--- a/jdk/make/java/dyn/Makefile Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/make/java/dyn/Makefile Tue Dec 21 18:45:45 2010 -0800
@@ -36,9 +36,7 @@
LANGUAGE_VERSION = -source 7
CLASS_VERSION = -target 7
-# Actually, it will be less disruptive to compile with the same
-# -target option as the rest of the system, and just turn on
-# the specific compiler option we need here:
-OTHER_JAVACFLAGS = -XDinvokedynamic
+# Tell the compiler not to accept transitional forms.
+OTHER_JAVACFLAGS = -XDallowTransitionalJSR292=no
include $(BUILDDIR)/common/Classes.gmk
--- a/jdk/src/share/classes/java/dyn/BootstrapMethod.java Tue Dec 21 15:27:55 2010 -0800
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,82 +0,0 @@
-/*
- * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package java.dyn;
-
-import java.lang.annotation.*;
-
-/**
- * Annotation on InvokeDynamic method calls which requests the JVM to use a specific
- * <a href="package-summary.html#bsm">bootstrap method</a>
- * to link the call. This annotation is not retained as such in the class file,
- * but is transformed into a constant-pool entry for the invokedynamic instruction which
- * specifies the desired bootstrap method.
- * <p>
- * If only the <code>value</code> is given, it must name a subclass of {@link CallSite}
- * with a constructor which accepts a class, string, and method type.
- * If the <code>value</code> and <code>name</code> are both given, there must be
- * a static method in the given class of the given name which accepts a class, string,
- * and method type, and returns a reference coercible to {@link CallSite}.
- * <p>
- * This annotation can be placed either on the return type of a single {@link InvokeDynamic}
- * call (see examples) or else it can be placed on an enclosing class or method, where it
- * determines a default bootstrap method for any {@link InvokeDynamic} calls which are not
- * specifically annotated with a bootstrap method.
- * Every {@link InvokeDynamic} call must be given a bootstrap method.
- * <p>
- * Examples:
-<blockquote><pre>
-@BootstrapMethod(value=MyLanguageRuntime.class, name="bootstrapDynamic")
-String x = (String) InvokeDynamic.greet();
-//BSM => MyLanguageRuntime.bootstrapDynamic(Here.class, "greet", methodType(String.class))
-@BootstrapMethod(MyCallSite.class)
-void example() throws Throwable {
- InvokeDynamic.greet();
- //BSM => new MyCallSite(Here.class, "greet", methodType(void.class))
-}
-</pre></blockquote>
- * <p>
- */
-@Target({ElementType.TYPE_USE,
- // For defaulting every indy site within a class or method; cf. @SuppressWarnings:
- ElementType.TYPE, ElementType.METHOD, ElementType.CONSTRUCTOR
- })
-@Retention(RetentionPolicy.SOURCE)
-public @interface BootstrapMethod {
- /** The class containing the bootstrap method. */
- Class<?> value();
-
- /** The name of the bootstrap method.
- * If this is the empty string, an instance of the bootstrap class is created,
- * and a constructor is invoked.
- * Otherwise, there must be a static method of the required name.
- */
- String name() default ""; // empty string denotes a constructor with 'new'
-
- /** The argument types of the bootstrap method, as passed out by the JVM.
- * There is usually no reason to override the default.
- */
- Class<?>[] arguments() default {Class.class, String.class, MethodType.class};
-}
--- a/jdk/src/share/classes/java/dyn/CallSite.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/java/dyn/CallSite.java Tue Dec 21 18:45:45 2010 -0800
@@ -26,40 +26,45 @@
package java.dyn;
import sun.dyn.*;
+import sun.dyn.empty.Empty;
+import sun.misc.Unsafe;
import java.util.Collection;
/**
* A {@code CallSite} is a holder for a variable {@link MethodHandle},
* which is called its {@code target}.
- * Every call to a {@code CallSite} is delegated to the site's current target.
+ * An {@code invokedynamic} instruction linked to a {@code CallSite} delegates
+ * all calls to the site's current target.
+ * A {@code CallSite} may be associated with several {@code invokedynamic}
+ * instructions, or it may be "free floating", associated with none.
+ * In any case, it may be invoked through an associated method handle
+ * called its {@linkplain #dynamicInvoker dynamic invoker}.
* <p>
- * A call site is initially created in an <em>unlinked</em> state,
- * which is distinguished by a null target variable.
- * Before the call site may be invoked (and before certain other
- * operations are attempted), the call site must be linked to
- * a non-null target.
+ * {@code CallSite} is an abstract class which does not allow
+ * direct subclassing by users. It has three immediate,
+ * concrete subclasses that may be either instantiated or subclassed.
+ * <ul>
+ * <li>If a mutable target is not required, an {@code invokedynamic} instruction
+ * may be permanently bound by means of a {@linkplain ConstantCallSite constant call site}.
+ * <li>If a mutable target is required which has volatile variable semantics,
+ * because updates to the target must be immediately and reliably witnessed by other threads,
+ * a {@linkplain VolatileCallSite volatile call site} may be used.
+ * <li>Otherwise, if a mutable target is required,
+ * a {@linkplain MutableCallSite mutable call site} may be used.
+ * </ul>
* <p>
- * A call site may be <em>relinked</em> by changing its target.
- * The new target must be non-null and must have the same
- * {@linkplain MethodHandle#type() type}
+ * A non-constant call site may be <em>relinked</em> by changing its target.
+ * The new target must have the same {@linkplain MethodHandle#type() type}
* as the previous target.
* Thus, though a call site can be relinked to a series of
* successive targets, it cannot change its type.
* <p>
- * Linkage happens once in the lifetime of any given {@code CallSite} object.
- * Because of call site invalidation, this linkage can be repeated for
- * a single {@code invokedynamic} instruction, with multiple {@code CallSite} objects.
- * When a {@code CallSite} is unlinked from an {@code invokedynamic} instruction,
- * the instruction is reset so that it is no longer associated with
- * the {@code CallSite} object, but the {@code CallSite} does not change
- * state.
- * <p>
* Here is a sample use of call sites and bootstrap methods which links every
* dynamic call site to print its arguments:
<blockquote><pre><!-- see indy-demo/src/PrintArgsDemo.java -->
-@BootstrapMethod(value=PrintArgsDemo.class, name="bootstrapDynamic")
static void test() throws Throwable {
- InvokeDynamic.baz("baz arg", 2, 3.14);
+ // THE FOLLOWING LINE IS PSEUDOCODE FOR A JVM INSTRUCTION
+ InvokeDynamic[#bootstrapDynamic].baz("baz arg", 2, 3.14);
}
private static void printArgs(Object... args) {
System.out.println(java.util.Arrays.deepToString(args));
@@ -71,16 +76,15 @@
printArgs = lookup.findStatic(thisClass,
"printArgs", MethodType.methodType(void.class, Object[].class));
}
-private static CallSite bootstrapDynamic(Class caller, String name, MethodType type) {
+private static CallSite bootstrapDynamic(MethodHandles.Lookup caller, String name, MethodType type) {
// ignore caller and name, but match the type:
- return new CallSite(MethodHandles.collectArguments(printArgs, type));
+ return new ConstantCallSite(MethodHandles.collectArguments(printArgs, type));
}
</pre></blockquote>
* @author John Rose, JSR 292 EG
*/
-public class CallSite
- implements MethodHandleProvider
-{
+abstract
+public class CallSite {
private static final Access IMPL_TOKEN = Access.getToken();
// Fields used only by the JVM. Do not use or change.
@@ -88,61 +92,47 @@
private int vmindex; // supplied by the JVM (BCI within calling method)
// The actual payload of this call site:
- private MethodHandle target;
+ /*package-private*/
+ MethodHandle target;
// Remove this field for PFD and delete deprecated methods:
private MemberName calleeNameRemoveForPFD;
/**
- * Make a blank call site object.
- * Before it is returned from a bootstrap method, this {@code CallSite} object
- * must be provided with
- * a target method via a call to {@link CallSite#setTarget(MethodHandle) setTarget},
- * or by a subclass override of {@link CallSite#initialTarget(Class,String,MethodType) initialTarget}.
+ * Make a blank call site object with the given method type.
+ * An initial target method is supplied which will throw
+ * an {@link IllegalStateException} if called.
+ * <p>
+ * Before this {@code CallSite} object is returned from a bootstrap method,
+ * it is usually provided with a more useful target method,
+ * via a call to {@link CallSite#setTarget(MethodHandle) setTarget}.
+ * @throws NullPointerException if the proposed type is null
*/
- public CallSite() {
+ /*package-private*/
+ CallSite(MethodType type) {
+ target = MethodHandles.invokers(type).uninitializedCallSite();
}
/**
* Make a blank call site object, possibly equipped with an initial target method handle.
- * The initial target reference may be null, in which case the {@code CallSite} object
- * must be provided with a target method via a call to {@link CallSite#setTarget},
- * or by a subclass override of {@link CallSite#initialTarget}.
- * @param target the method handle which will be the initial target of the call site, or null if there is none yet
+ * @param target the method handle which will be the initial target of the call site
+ * @throws NullPointerException if the proposed target is null
*/
- public CallSite(MethodHandle target) {
+ /*package-private*/
+ CallSite(MethodHandle target) {
+ target.type(); // null check
this.target = target;
}
- /** @deprecated transitional form defined in EDR but removed in PFD */
- public CallSite(Class<?> caller, String name, MethodType type) {
- this.calleeNameRemoveForPFD = new MemberName(caller, name, type);
- }
- /** @deprecated transitional form defined in EDR but removed in PFD */
- public Class<?> callerClass() {
- MemberName callee = this.calleeNameRemoveForPFD;
- return callee == null ? null : callee.getDeclaringClass();
- }
- /** @deprecated transitional form defined in EDR but removed in PFD */
- public String name() {
- MemberName callee = this.calleeNameRemoveForPFD;
- return callee == null ? null : callee.getName();
- }
- /** @deprecated transitional form defined in EDR but removed in PFD */
+ /**
+ * Report the type of this call site's target.
+ * Although targets may change, the call site's type can never change.
+ * The {@code setTarget} method enforces this invariant by refusing any new target that does
+ * not have the previous target's type.
+ * @return the type of the current target, which is also the type of any future target
+ */
public MethodType type() {
- MemberName callee = this.calleeNameRemoveForPFD;
- return callee == null ? (target == null ? null : target.type()) : callee.getMethodType();
- }
- /** @deprecated transitional form defined in EDR but removed in PFD */
- protected MethodHandle initialTarget() {
- return initialTarget(callerClass(), name(), type());
- }
-
- /** Report if the JVM has linked this {@code CallSite} object to a dynamic call site instruction.
- * Once it is linked, it is never unlinked.
- */
- private boolean isLinked() {
- return vmmethod != null;
+ return target.type();
}
/** Called from JVM (or low-level Java code) after the BSM returns the newly created CallSite.
@@ -152,68 +142,66 @@
MethodType type,
MemberName callerMethod,
int callerBCI) {
- if (this.isLinked()) {
+ if (this.vmmethod != null) {
+ // FIXME
throw new InvokeDynamicBootstrapError("call site has already been linked to an invokedynamic instruction");
}
- MethodHandle target = this.target;
- if (target == null) {
- this.target = target = this.initialTarget(callerMethod.getDeclaringClass(), name, type);
- }
- if (!target.type().equals(type)) {
+ if (!this.type().equals(type)) {
throw wrongTargetType(target, type);
}
this.vmindex = callerBCI;
this.vmmethod = callerMethod;
- assert(this.isLinked());
}
/**
- * Just after a call site is created by a bootstrap method handle,
- * if the target has not been initialized by the factory method itself,
- * the method {@code initialTarget} is called to produce an initial
- * non-null target. (Live call sites must never have null targets.)
- * <p>
- * The arguments are the same as those passed to the bootstrap method.
- * Thus, a bootstrap method is free to ignore the arguments and simply
- * create a "blank" {@code CallSite} object of an appropriate subclass.
+ * Report the current linkage state of the call site, a value which may change over time.
* <p>
- * If the bootstrap method itself does not initialize the call site,
- * this method must be overridden, because it just raises an
- * {@code InvokeDynamicBootstrapError}, which in turn causes the
- * linkage of the {@code invokedynamic} instruction to terminate
- * abnormally.
- * @deprecated transitional form defined in EDR but removed in PFD
- */
- protected MethodHandle initialTarget(Class<?> callerClass, String name, MethodType type) {
- throw new InvokeDynamicBootstrapError("target must be initialized before call site is linked: "+name+type);
- }
-
- /**
- * Report the current linkage state of the call site. (This is mutable.)
- * The value may not be null after the {@code CallSite} object is returned
- * from the bootstrap method of the {@code invokedynamic} instruction.
- * When an {@code invokedynamic} instruction is executed, the target method
- * of its associated {@code call site} object is invoked directly,
- * as if via {@link MethodHandle}{@code .invoke}.
+ * If a {@code CallSite} object is returned
+ * from the bootstrap method of the {@code invokedynamic} instruction,
+ * the {@code CallSite} is permanently bound to that instruction.
+ * When the {@code invokedynamic} instruction is executed, the target method
+ * of its associated call site object is invoked directly.
+ * It is as if the instruction calls {@code getTarget} and then
+ * calls {@link MethodHandle#invokeExact invokeExact} on the result.
* <p>
- * The interactions of {@code getTarget} with memory are the same
+ * Unless specified differently by a subclass,
+ * the interactions of {@code getTarget} with memory are the same
* as of a read from an ordinary variable, such as an array element or a
* non-volatile, non-final field.
* <p>
* In particular, the current thread may choose to reuse the result
* of a previous read of the target from memory, and may fail to see
* a recent update to the target by another thread.
- * @return the current linkage state of the call site
+ * <p>
+ * In a {@linkplain ConstantCallSite constant call site}, the {@code getTarget} method behaves
+ * like a read from a {@code final} field of the {@code CallSite}.
+ * <p>
+ * In a {@linkplain VolatileCallSite volatile call site}, the {@code getTarget} method behaves
+ * like a read from a {@code volatile} field of the {@code CallSite}.
+ * <p>
+ * This method may not be overridden by application code.
+ * @return the current linkage state of the call site, its target method handle
+ * @see ConstantCallSite
+ * @see VolatileCallSite
* @see #setTarget
*/
- public MethodHandle getTarget() {
+ public final MethodHandle getTarget() {
+ return getTarget0();
+ }
+
+ /**
+ * Privileged implementations can override this to force final or volatile semantics on getTarget.
+ */
+ /*package-private*/
+ MethodHandle getTarget0() {
return target;
}
/**
* Set the target method of this call site.
* <p>
- * The interactions of {@code setTarget} with memory are the same
+ * Unless a subclass of CallSite documents otherwise,
+ * the interactions of {@code setTarget} with memory are the same
* as of a write to an ordinary variable, such as an array element or a
* non-volatile, non-final field.
* <p>
@@ -224,43 +212,32 @@
* at any given call site.
* @param newTarget the new target
* @throws NullPointerException if the proposed new target is null
- * @throws WrongMethodTypeException if the call site is linked and the proposed new target
+ * @throws WrongMethodTypeException if the proposed new target
* has a method type that differs from the previous target
+ * @throws UnsupportedOperationException if the call site is
+ * in fact a {@link ConstantCallSite}
*/
public void setTarget(MethodHandle newTarget) {
+ checkTargetChange(this.target, newTarget);
+ setTargetNormal(newTarget);
+ }
+
+ void checkTargetChange(MethodHandle oldTarget, MethodHandle newTarget) {
+ MethodType oldType = oldTarget.type();
MethodType newType = newTarget.type(); // null check!
- MethodHandle oldTarget = this.target;
- if (oldTarget == null) {
- // CallSite is not yet linked.
- assert(!isLinked());
- this.target = newTarget; // might be null!
- return;
- }
- MethodType oldType = oldTarget.type();
- if (!newTarget.type().equals(oldType))
+ if (!newType.equals(oldType))
throw wrongTargetType(newTarget, oldType);
- if (oldTarget != newTarget)
- CallSiteImpl.setCallSiteTarget(IMPL_TOKEN, this, newTarget);
}
private static WrongMethodTypeException wrongTargetType(MethodHandle target, MethodType type) {
- return new WrongMethodTypeException(String.valueOf(target)+target.type()+" should be of type "+type);
- }
-
- /** Produce a printed representation that displays information about this call site
- * that may be useful to the human reader.
- */
- @Override
- public String toString() {
- return "CallSite"+(target == null ? "" : target.type());
+ return new WrongMethodTypeException(String.valueOf(target)+" should be of type "+type);
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle equivalent to an invokedynamic instruction
* which has been linked to this call site.
- * <p>If this call site is a {@link ConstantCallSite}, this method
- * simply returns the call site's target, since that will not change.
+ * <p>If this call site is a {@linkplain ConstantCallSite constant call site},
+ * this method simply returns the call site's target, since that will never change.
* <p>Otherwise, this method is equivalent to the following code:
* <p><blockquote><pre>
* MethodHandle getTarget, invoker, result;
@@ -271,8 +248,9 @@
* @return a method handle which always invokes this call site's current target
*/
public final MethodHandle dynamicInvoker() {
- if (this instanceof ConstantCallSite)
- return getTarget(); // will not change dynamically
+ if (this instanceof ConstantCallSite) {
+ return getTarget0(); // will not change dynamically
+ }
MethodHandle getTarget = MethodHandleImpl.bindReceiver(IMPL_TOKEN, GET_TARGET, this);
MethodHandle invoker = MethodHandles.exactInvoker(this.type());
return MethodHandles.foldArguments(invoker, getTarget);
@@ -287,9 +265,34 @@
}
}
- /** Implementation of {@link MethodHandleProvider} which returns {@code this.dynamicInvoker()}. */
- public final MethodHandle asMethodHandle() { return dynamicInvoker(); }
+ /** This guy is rolled into the default target if a MethodType is supplied to the constructor. */
+ /*package-private*/
+ static Empty uninitializedCallSite() {
+ throw new IllegalStateException("uninitialized call site");
+ }
+
+ // unsafe stuff:
+ private static final Unsafe unsafe = Unsafe.getUnsafe();
+ private static final long TARGET_OFFSET;
+
+ static {
+ try {
+ TARGET_OFFSET = unsafe.objectFieldOffset(CallSite.class.getDeclaredField("target"));
+ } catch (Exception ex) { throw new Error(ex); }
+ }
- /** Implementation of {@link MethodHandleProvider}, which returns {@code this.dynamicInvoker().asType(type)}. */
- public final MethodHandle asMethodHandle(MethodType type) { return dynamicInvoker().asType(type); }
+ /*package-private*/
+ void setTargetNormal(MethodHandle newTarget) {
+ target = newTarget;
+ //CallSiteImpl.setCallSiteTarget(IMPL_TOKEN, this, newTarget);
+ }
+ /*package-private*/
+ MethodHandle getTargetVolatile() {
+ return (MethodHandle) unsafe.getObjectVolatile(this, TARGET_OFFSET);
+ }
+ /*package-private*/
+ void setTargetVolatile(MethodHandle newTarget) {
+ unsafe.putObjectVolatile(this, TARGET_OFFSET, newTarget);
+ //CallSiteImpl.setCallSiteTarget(IMPL_TOKEN, this, newTarget);
+ }
}
--- a/jdk/src/share/classes/java/dyn/ClassValue.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/java/dyn/ClassValue.java Tue Dec 21 18:45:45 2010 -0800
@@ -28,44 +28,78 @@
import java.util.WeakHashMap;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
+import java.lang.reflect.UndeclaredThrowableException;
/**
* Lazily associate a computed value with (potentially) every class.
* @author John Rose, JSR 292 EG
*/
-public abstract class ClassValue<T> {
+public class ClassValue<T> {
/**
* Compute the given class's derived value for this {@code ClassValue}.
* <p>
* This method will be invoked within the first thread that accesses
- * the value with the {@link #get}.
+ * the value with the {@link #get get} method.
* <p>
* Normally, this method is invoked at most once per class,
- * but it may be invoked again in case of subsequent invocations
- * of {@link #remove} followed by {@link #get}.
+ * but it may be invoked again if there has been a call to
+ * {@link #remove remove}.
+ * <p>
+ * If there is no override from a subclass, this method returns
+ * the result of applying the {@code ClassValue}'s {@code computeValue}
+ * method handle, which was supplied at construction time.
*
- * @return the computed value for this thread-local
+ * @return the newly computed value associated with this {@code ClassValue}, for the given class or interface
+ * @throws UndeclaredThrowableException if the {@code computeValue} method handle invocation throws something other than a {@code RuntimeException} or {@code Error}
+ * @throws UnsupportedOperationException if the {@code computeValue} method handle is null (subclasses must override)
*/
- protected abstract T computeValue(Class<?> type);
+ protected T computeValue(Class<?> type) {
+ if (computeValue == null)
+ return null;
+ try {
+ return (T) (Object) computeValue.invokeGeneric(type);
+ } catch (Throwable ex) {
+ if (ex instanceof Error) throw (Error) ex;
+ if (ex instanceof RuntimeException) throw (RuntimeException) ex;
+ throw new UndeclaredThrowableException(ex);
+ }
+ }
+
+ private final MethodHandle computeValue;
/**
* Creates a new class value.
+ * Subclasses which use this constructor must override
+ * the {@link #computeValue computeValue} method,
+ * since the default {@code computeValue} method requires a method handle,
+ * which this constructor does not provide.
*/
protected ClassValue() {
+ this.computeValue = null;
+ }
+
+ /**
+ * Creates a new class value, whose {@link #computeValue computeValue} method
+ * will return the result of {@code computeValue.invokeGeneric(type)}.
+ * @throws NullPointerException if the method handle parameter is null
+ */
+ public ClassValue(MethodHandle computeValue) {
+ computeValue.getClass(); // trigger NPE if null
+ this.computeValue = computeValue;
}
/**
* Returns the value for the given class.
* If no value has yet been computed, it is obtained by
- * by an invocation of the {@link #computeValue} method.
+ * by an invocation of the {@link #computeValue computeValue} method.
* <p>
* The actual installation of the value on the class
- * is performed while the class's synchronization lock
- * is held. At that point, if racing threads have
+ * is performed atomically.
+ * At that point, if racing threads have
* computed values, one is chosen, and returned to
* all the racing threads.
*
- * @return the current thread's value of this thread-local
+ * @return the current value associated with this {@code ClassValue}, for the given class or interface
*/
public T get(Class<?> type) {
ClassValueMap map = getMap(type);
@@ -81,9 +115,16 @@
/**
* Removes the associated value for the given class.
* If this value is subsequently {@linkplain #get read} for the same class,
- * its value will be reinitialized by invoking its {@link #computeValue} method.
+ * its value will be reinitialized by invoking its {@link #computeValue computeValue} method.
* This may result in an additional invocation of the
- * {@code computeValue} method for the given class.
+ * {@code computeValue computeValue} method for the given class.
+ * <p>
+ * If racing threads perform a combination of {@code get} and {@code remove} calls,
+ * the calls are serialized.
+ * A value produced by a call to {@code computeValue} will be discarded, if
+ * the corresponding {@code get} call was followed by a {@code remove} call
+ * before the {@code computeValue} could complete.
+ * In such a case, the {@code get} call will re-invoke {@code computeValue}.
*/
public void remove(Class<?> type) {
ClassValueMap map = getMap(type);
@@ -118,6 +159,7 @@
// Warm up the table with a null entry.
map.preInitializeEntry(this);
}
+ STORE_BARRIER.lazySet(0);
// All stores pending from table expansion are completed.
synchronized (map) {
value = (T) map.initializeEntry(this, value);
--- a/jdk/src/share/classes/java/dyn/ConstantCallSite.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/java/dyn/ConstantCallSite.java Tue Dec 21 18:45:45 2010 -0800
@@ -27,17 +27,21 @@
/**
* A {@code ConstantCallSite} is a {@link CallSite} whose target is permanent, and can never be changed.
- * The only way to relink an {@code invokedynamic} instruction bound to a {@code ConstantCallSite} is
- * to invalidate the instruction as a whole.
+ * An {@code invokedynamic} instruction linked to a {@code ConstantCallSite} is permanently
+ * bound to the call site's target.
* @author John Rose, JSR 292 EG
*/
public class ConstantCallSite extends CallSite {
- /** Create a call site with a permanent target. */
+ /** Create a call site with a permanent target.
+ * @throws NullPointerException if the proposed target is null
+ */
public ConstantCallSite(MethodHandle target) {
super(target);
}
- /** Throw an {@link IllegalArgumentException}, because this kind of call site cannot change its target. */
+ /**
+ * Throw an {@link UnsupportedOperationException}, because this kind of call site cannot change its target.
+ */
@Override public final void setTarget(MethodHandle ignore) {
- throw new IllegalArgumentException("ConstantCallSite");
+ throw new UnsupportedOperationException("ConstantCallSite");
}
}
--- a/jdk/src/share/classes/java/dyn/InvokeDynamic.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/java/dyn/InvokeDynamic.java Tue Dec 21 18:45:45 2010 -0800
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2008, 2009, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@@ -26,55 +26,8 @@
package java.dyn;
/**
- * {@code InvokeDynamic} is a class with neither methods nor instances,
- * which serves only as a syntactic marker in Java source code for
- * an {@code invokedynamic} instruction.
- * (See <a href="package-summary.html#jvm_mods">the package information</a> for specifics on this instruction.)
- * <p>
- * The {@code invokedynamic} instruction is incomplete without a target method.
- * The target method is a property of the reified {@linkplain CallSite call site object}
- * which is linked to each active {@code invokedynamic} instruction.
- * The call site object is initially produced by a
- * {@linkplain BootstrapMethod bootstrap method}
- * associated with the class whose bytecodes include the dynamic call site.
- * <p>
- * The type {@code InvokeDynamic} has no particular meaning as a
- * class or interface supertype, or an object type; it can never be instantiated.
- * Logically, it denotes a source of all dynamically typed methods.
- * It may be viewed as a pure syntactic marker of static calls.
- * It may be imported for ease of use.
- * <p>
- * Here are some examples:
-<blockquote><pre><!-- see indy-demo/src/JavaDocExamples.java -->
-@BootstrapMethod(value=Here.class, name="bootstrapDynamic")
-static void example() throws Throwable {
- Object x; String s; int i;
- x = InvokeDynamic.greet("world"); // greet(Ljava/lang/String;)Ljava/lang/Object;
- s = (String) InvokeDynamic.hail(x); // hail(Ljava/lang/Object;)Ljava/lang/String;
- InvokeDynamic.cogito(); // cogito()V
- i = (int) InvokeDynamic.#"op:+"(2, 3); // "op:+"(II)I
+ * This is a place-holder class. Some HotSpot implementations need to see it.
+ */
+final class InvokeDynamic {
+ private InvokeDynamic() { throw new InternalError(); } // do not instantiate
}
-static MethodHandle bootstrapDynamic(Class caller, String name, MethodType type) { ... }
-</pre></blockquote>
- * Each of the above calls generates a single invokedynamic instruction
- * with the name-and-type descriptors indicated in the comments.
- * <p>
- * The argument types are taken directly from the actual arguments,
- * while the return type corresponds to the target of the assignment.
- * (Currently, the return type must be given as a false type parameter.
- * This type parameter is an irregular use of the generic type syntax,
- * and is likely to change in favor of a convention based on target typing.)
- * <p>
- * The final example uses a special syntax for uttering non-Java names.
- * Any name legal to the JVM may be given between the double quotes.
- * <p>
- * None of these calls is complete without a bootstrap method,
- * which must be declared for the enclosing class or method.
- * @author John Rose, JSR 292 EG
- */
-@MethodHandle.PolymorphicSignature
-public final class InvokeDynamic {
- private InvokeDynamic() { throw new InternalError(); } // do not instantiate
-
- // no statically defined static methods
-}
--- a/jdk/src/share/classes/java/dyn/InvokeDynamicBootstrapError.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/java/dyn/InvokeDynamicBootstrapError.java Tue Dec 21 18:45:45 2010 -0800
@@ -67,4 +67,16 @@
public InvokeDynamicBootstrapError(String s, Throwable cause) {
super(s, cause);
}
+
+ /**
+ * Constructs a {@code InvokeDynamicBootstrapError} with the specified
+ * cause.
+ *
+ * @param cause the cause, may be {@code null}.
+ */
+ public InvokeDynamicBootstrapError(Throwable cause) {
+ // cf. Throwable(Throwable cause) constructor.
+ super(cause == null ? null : cause.toString());
+ initCause(cause);
+ }
}
--- a/jdk/src/share/classes/java/dyn/Linkage.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/java/dyn/Linkage.java Tue Dec 21 18:45:45 2010 -0800
@@ -29,15 +29,16 @@
import java.util.WeakHashMap;
import sun.dyn.Access;
import sun.dyn.MethodHandleImpl;
+import sun.dyn.util.VerifyAccess;
import sun.reflect.Reflection;
-import static sun.dyn.util.VerifyAccess.checkBootstrapPrivilege;
import static sun.dyn.MemberName.newIllegalArgumentException;
/**
- * This class consists exclusively of static methods that control
- * the linkage of {@code invokedynamic} instructions, and specifically
- * their reification as {@link CallSite} objects.
+ * <em>CLASS WILL BE REMOVED FOR PFD:</em>
+ * Static routines for controlling invokedynamic behavior.
+ * Replaced by non-static APIs.
* @author John Rose, JSR 292 EG
+ * @deprecated This class will be removed in the Public Final Draft.
*/
public class Linkage {
private static final Access IMPL_TOKEN = Access.getToken();
@@ -45,68 +46,24 @@
private Linkage() {} // do not instantiate
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
+ * <em>METHOD WILL BE REMOVED FOR PFD:</em>
* Register a <em>bootstrap method</em> to use when linking dynamic call sites within
* a given caller class.
- * <p>
- * A bootstrap method must be a method handle with a return type of {@link CallSite}
- * and the following arguments:
- * <ul>
- * <li>the class containing the {@code invokedynamic} instruction, for which the bootstrap method was registered
- * <li>the name of the method being invoked (a {@link String})
- * <li>the type of the method being invoked (a {@link MethodType})
- * </ul>
- * The bootstrap method acts as a factory method which accepts the given arguments
- * and returns a {@code CallSite} object (possibly of a subclass of {@code CallSite}).
- * <p>
- * The registration must take place exactly once, either before the class has begun
- * being initialized, or from within the class's static initializer.
- * Registration will fail with an exception if any of the following conditions hold:
- * <ul>
- * <li>The immediate caller of this method is in a different package than the given caller class,
- * and there is a security manager, and its {@code checkPermission} call throws
- * when passed {@link LinkagePermission}("registerBootstrapMethod",callerClass).
- * <li>The given caller class already has a bootstrap method registered.
- * <li>The given caller class is already fully initialized.
- * <li>The given caller class is in the process of initialization, in another thread.
- * </ul>
- * Because of these rules, a class may install its own bootstrap method in
- * a static initializer.
- * @param callerClass a class that may have {@code invokedynamic} sites
- * @param bootstrapMethod the method to use to bootstrap all such sites
- * @exception IllegalArgumentException if the class argument is null or
- * a primitive class, or if the bootstrap method is the wrong type
- * @exception IllegalStateException if the class already has a bootstrap
- * method, or if the its static initializer has already run
- * or is already running in another thread
- * @exception SecurityException if there is a security manager installed,
- * and a {@link LinkagePermission} check fails for "registerBootstrapMethod"
- * @deprecated Use @{@link BootstrapMethod} annotations instead
+ * @deprecated Use @{@link BootstrapMethod} annotations instead.
*/
public static
void registerBootstrapMethod(Class callerClass, MethodHandle bootstrapMethod) {
Class callc = Reflection.getCallerClass(2);
- checkBootstrapPrivilege(callc, callerClass, "registerBootstrapMethod");
- checkBSM(bootstrapMethod);
+ if (callc != null && !VerifyAccess.isSamePackage(callerClass, callc))
+ throw new IllegalArgumentException("cannot set bootstrap method on "+callerClass);
MethodHandleImpl.registerBootstrap(IMPL_TOKEN, callerClass, bootstrapMethod);
}
- static private void checkBSM(MethodHandle mh) {
- if (mh == null) throw newIllegalArgumentException("null bootstrap method");
- if (mh.type() == BOOTSTRAP_METHOD_TYPE) return;
- throw new WrongMethodTypeException(mh.toString());
- }
-
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
+ * <em>METHOD WILL BE REMOVED FOR PFD:</em>
* Simplified version of {@code registerBootstrapMethod} for self-registration,
* to be called from a static initializer.
- * Finds a static method of the required type in the
- * given runtime class, and installs it on the caller class.
- * @throws NoSuchMethodException if there is no such method
- * @throws IllegalStateException if the caller class's static initializer
- * has already run, or is already running in another thread
- * @deprecated Use @{@link BootstrapMethod} annotations instead
+ * @deprecated Use @{@link BootstrapMethod} annotations instead.
*/
public static
void registerBootstrapMethod(Class<?> runtime, String name) {
@@ -115,15 +72,9 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
+ * <em>METHOD WILL BE REMOVED FOR PFD:</em>
* Simplified version of {@code registerBootstrapMethod} for self-registration,
- * to be called from a static initializer.
- * Finds a static method of the required type in the
- * caller class itself, and installs it on the caller class.
- * @throws IllegalArgumentException if there is no such method
- * @throws IllegalStateException if the caller class's static initializer
- * has already run, or is already running in another thread
- * @deprecated Use @{@link BootstrapMethod} annotations instead
+ * @deprecated Use @{@link BootstrapMethod} annotations instead.
*/
public static
void registerBootstrapMethod(String name) {
@@ -140,82 +91,33 @@
} catch (NoAccessException ex) {
throw new IllegalArgumentException("no such bootstrap method in "+runtime+": "+name, ex);
}
- checkBSM(bootstrapMethod);
MethodHandleImpl.registerBootstrap(IMPL_TOKEN, callerClass, bootstrapMethod);
}
- /**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
- * Report the bootstrap method registered for a given caller class.
- * Returns null if the class has never yet registered a bootstrap method.
- * Only callers privileged to set the bootstrap method may inquire
- * about it, because a bootstrap method is potentially a back-door entry
- * point into its class.
- * @exception IllegalArgumentException if the argument is null or
- * a primitive class
- * @exception SecurityException if there is a security manager installed,
- * and the immediate caller of this method is not in the same
- * package as the caller class
- * and a {@link LinkagePermission} check fails for "getBootstrapMethod"
- * @deprecated
- */
- public static
- MethodHandle getBootstrapMethod(Class callerClass) {
- Class callc = Reflection.getCallerClass(2);
- checkBootstrapPrivilege(callc, callerClass, "getBootstrapMethod");
- return MethodHandleImpl.getBootstrap(IMPL_TOKEN, callerClass);
- }
-
- /**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
- * The type of any bootstrap method is a three-argument method
- * {@code (Class, String, MethodType)} returning a {@code CallSite}.
- */
- public static final MethodType BOOTSTRAP_METHOD_TYPE
+ private static final MethodType BOOTSTRAP_METHOD_TYPE
= MethodType.methodType(CallSite.class,
Class.class, String.class, MethodType.class);
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
+ * <em>METHOD WILL BE REMOVED FOR PFD:</em>
* Invalidate all <code>invokedynamic</code> call sites everywhere.
- * <p>
- * When this method returns, every <code>invokedynamic</code> instruction
- * will invoke its bootstrap method on next call.
- * <p>
- * It is unspecified whether call sites already known to the Java
- * code will continue to be associated with <code>invokedynamic</code>
- * instructions. If any call site is still so associated, its
- * {@link CallSite#getTarget()} method is guaranteed to return null
- * the invalidation operation completes.
- * <p>
- * Invalidation operations are likely to be slow. Use them sparingly.
+ * @deprecated Use {@linkplain CallSite#setTarget call site target setting}
+ * and {@link VolatileCallSite#invalidateAll call site invalidation} instead.
*/
public static
Object invalidateAll() {
- SecurityManager security = System.getSecurityManager();
- if (security != null) {
- security.checkPermission(new LinkagePermission("invalidateAll"));
- }
- throw new UnsupportedOperationException("NYI");
+ throw new UnsupportedOperationException();
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
+ * <em>METHOD WILL BE REMOVED FOR PFD:</em>
* Invalidate all {@code invokedynamic} call sites in the bytecodes
* of any methods of the given class.
- * <p>
- * When this method returns, every matching <code>invokedynamic</code>
- * instruction will invoke its bootstrap method on next call.
- * <p>
- * For additional semantics of call site invalidation,
- * see {@link #invalidateAll()}.
+ * @deprecated Use {@linkplain CallSite#setTarget call site target setting}
+ * and {@link VolatileCallSite#invalidateAll call site invalidation} instead.
*/
public static
Object invalidateCallerClass(Class<?> callerClass) {
- SecurityManager security = System.getSecurityManager();
- if (security != null) {
- security.checkPermission(new LinkagePermission("invalidateAll", callerClass));
- }
- throw new UnsupportedOperationException("NYI");
+ throw new UnsupportedOperationException();
}
}
--- a/jdk/src/share/classes/java/dyn/LinkagePermission.java Tue Dec 21 15:27:55 2010 -0800
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,104 +0,0 @@
-/*
- * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package java.dyn;
-
-import java.security.*;
-import java.util.Enumeration;
-import java.util.Hashtable;
-import java.util.StringTokenizer;
-
-/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
- * This class is for managing runtime permission checking for
- * operations performed by methods in the {@link Linkage} class.
- * Like a {@link RuntimePermission}, on which it is modeled,
- * a {@code LinkagePermission} contains a target name but
- * no actions list; you either have the named permission
- * or you don't.
- * <p>
- * The following table lists all the possible {@code LinkagePermission} target names,
- * and for each provides a description of what the permission allows
- * and a discussion of the risks of granting code the permission.
- * <p>
- *
- * <table border=1 cellpadding=5 summary="permission target name,
- * what the target allows,and associated risks">
- * <tr>
- * <th>Permission Target Name</th>
- * <th>What the Permission Allows</th>
- * <th>Risks of Allowing this Permission</th>
- * </tr>
- *
- * <tr>
- * <td>invalidateAll</td>
- * <td>Force the relinking of invokedynamic call sites everywhere.</td>
- * <td>This could allow an attacker to slow down the system,
- * or perhaps expose timing bugs in a dynamic language implementations,
- * by forcing redundant relinking operations.</td>
- * </tr>
- *
- *
- * <tr>
- * <td>invalidateCallerClass.{class name}</td>
- * <td>Force the relinking of invokedynamic call sites in the given class.</td>
- * <td>See {@code invalidateAll}.</td>
- * </tr>
- * </table>
- * <p>ISSUE: Is this still needed?
- *
- * @see java.lang.RuntimePermission
- * @see java.lang.SecurityManager
- *
- * @author John Rose, JSR 292 EG
- */
-
-public final class LinkagePermission extends BasicPermission {
- private static final long serialVersionUID = 292L;
-
- /**
- * Create a new LinkagePermission with the given name.
- * The name is the symbolic name of the LinkagePermission, such as
- * "invalidateCallerClass.*", etc. An asterisk
- * may appear at the end of the name, following a ".", or by itself, to
- * signify a wildcard match.
- *
- * @param name the name of the LinkagePermission
- */
- public LinkagePermission(String name) {
- super(name);
- }
-
- /**
- * Create a new LinkagePermission with the given name on the given class.
- * Equivalent to {@code LinkagePermission(name+"."+clazz.getName())}.
- *
- * @param name the name of the LinkagePermission
- * @param clazz the class affected by the permission
- */
- public LinkagePermission(String name, Class<?> clazz) {
- super(name + "." + clazz.getName());
- }
-}
--- a/jdk/src/share/classes/java/dyn/MethodHandle.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/java/dyn/MethodHandle.java Tue Dec 21 18:45:45 2010 -0800
@@ -37,20 +37,29 @@
* A method handle is a typed, directly executable reference to a method,
* constructor, field, or similar low-level operation, with optional
* transformations of arguments or return values.
- * (These transformations include conversion, insertion, deletion,
- * substitution. See the methods of this class and of {@link MethodHandles}.)
+ * These transformations are quite general, and include such patterns as
+ * {@linkplain #asType conversion},
+ * {@linkplain #bindTo insertion},
+ * {@linkplain java.dyn.MethodHandles#dropArguments deletion},
+ * and {@linkplain java.dyn.MethodHandles#filterArguments substitution}.
+ * <p>
+ * <em>Note: The super-class of MethodHandle is Object.
+ * Any other super-class visible in the Reference Implementation
+ * will be removed before the Proposed Final Draft.
+ * Also, the final version will not include any public or
+ * protected constructors.</em>
* <p>
* Method handles are strongly typed according to signature.
* They are not distinguished by method name or enclosing class.
* A method handle must be invoked under a signature which matches
- * the method handle's own {@link MethodType method type}.
+ * the method handle's own {@linkplain MethodType method type}.
* <p>
- * Every method handle confesses its type via the {@code type} accessor.
+ * Every method handle reports its type via the {@link #type type} accessor.
* The structure of this type is a series of classes, one of which is
* the return type of the method (or {@code void.class} if none).
* <p>
* Every method handle appears as an object containing a method named
- * {@code invoke}, whose signature exactly matches
+ * {@link #invokeExact invokeExact}, whose signature exactly matches
* the method handle's type.
* A Java method call expression, which compiles to an
* {@code invokevirtual} instruction,
@@ -61,15 +70,29 @@
* (The type is specified in the {@code invokevirtual} instruction,
* via a {@code CONSTANT_NameAndType} constant pool entry.)
* The call looks within the receiver object for a method
- * named {@code invoke} of the intended method type.
+ * named {@code invokeExact} of the intended method type.
* The call fails with a {@link WrongMethodTypeException}
- * if the method does not exist, even if there is an {@code invoke}
+ * if the method does not exist, even if there is an {@code invokeExact}
* method of a closely similar signature.
* As with other kinds
* of methods in the JVM, signature matching during method linkage
* is exact, and does not allow for language-level implicit conversions
* such as {@code String} to {@code Object} or {@code short} to {@code int}.
* <p>
+ * Each individual method handle also contains a method named
+ * {@link #invokeGeneric invokeGeneric}, whose type is the same
+ * as {@code invokeExact}, and is therefore also reported by
+ * the {@link #type type} accessor.
+ * A call to {@code invokeGeneric} works the same as a call to
+ * {@code invokeExact}, if the signature specified by the caller
+ * exactly matches the method handle's own type.
+ * If there is a type mismatch, {@code invokeGeneric} attempts
+ * to adjust the type of the target method handle
+ * (as if by a call to {@link #asType asType})
+ * to obtain an exactly invokable target.
+ * This allows a more powerful negotiation of method type
+ * between caller and callee.
+ * <p>
* A method handle is an unrestricted capability to call a method.
* A method handle can be formed on a non-public method by a class
* that has access to that method; the resulting handle can be used
@@ -77,31 +100,47 @@
* checking is performed when the method handle is created, not
* (as in reflection) every time it is called. Handles to non-public
* methods, or in non-public classes, should generally be kept secret.
- * They should not be passed to untrusted code.
+ * They should not be passed to untrusted code unless their use from
+ * the untrusted code would be harmless.
* <p>
- * Bytecode in an extended JVM can directly call a method handle's
- * {@code invoke} from an {@code invokevirtual} instruction.
+ * Bytecode in the JVM can directly call a method handle's
+ * {@code invokeExact} method from an {@code invokevirtual} instruction.
* The receiver class type must be {@code MethodHandle} and the method name
- * must be {@code invoke}. The signature of the invocation
+ * must be {@code invokeExact}. The signature of the invocation
* (after resolving symbolic type names) must exactly match the method type
* of the target method.
+ * Similarly, bytecode can directly call a method handle's {@code invokeGeneric}
+ * method. The signature of the invocation (after resolving symbolic type names)
+ * must either exactly match the method type or be a valid argument to
+ * the target's {@link #asType asType} method.
* <p>
- * Every {@code invoke} method always throws {@link Exception},
+ * Every {@code invokeExact} and {@code invokeGeneric} method always
+ * throws {@link java.lang.Throwable Throwable},
* which is to say that there is no static restriction on what a method handle
* can throw. Since the JVM does not distinguish between checked
* and unchecked exceptions (other than by their class, of course),
* there is no particular effect on bytecode shape from ascribing
* checked exceptions to method handle invocations. But in Java source
* code, methods which perform method handle calls must either explicitly
- * throw {@code Exception}, or else must catch all checked exceptions locally.
+ * throw {@code java.lang.Throwable Throwable}, or else must catch all
+ * throwables locally, rethrowing only those which are legal in the context,
+ * and wrapping ones which are illegal.
* <p>
- * Bytecode in an extended JVM can directly obtain a method handle
+ * Bytecode in the JVM can directly obtain a method handle
* for any accessible method from a {@code ldc} instruction
- * which refers to a {@code CONSTANT_Methodref} or
- * {@code CONSTANT_InterfaceMethodref} constant pool entry.
+ * which refers to a {@code CONSTANT_MethodHandle} constant pool entry.
+ * (Each such entry refers directly to a {@code CONSTANT_Methodref},
+ * {@code CONSTANT_InterfaceMethodref}, or {@code CONSTANT_Fieldref}
+ * constant pool entry.
+ * For more details, see the <a href="package-summary.html#mhcon">package summary</a>.)
* <p>
- * All JVMs can also use a reflective API called {@code MethodHandles}
+ * Java code can also use a reflective API called
+ * {@link java.dyn.MethodHandles.Lookup MethodHandles.Lookup}
* for creating and calling method handles.
+ * For example, a static method handle can be obtained
+ * from {@link java.dyn.MethodHandles.Lookup#findStatic Lookup.findStatic}.
+ * There are also bridge methods from Core Reflection API objects,
+ * such as {@link java.dyn.MethodHandles.Lookup#unreflect Lookup.ureflect}.
* <p>
* A method reference may refer either to a static or non-static method.
* In the non-static case, the method handle type includes an explicit
@@ -128,10 +167,10 @@
mt = MethodType.methodType(String.class, char.class, char.class);
mh = lookup.findVirtual(String.class, "replace", mt);
// (Ljava/lang/String;CC)Ljava/lang/String;
-s = mh.<String>invokeExact("daddy",'d','n');
+s = (String) mh.invokeExact("daddy",'d','n');
assert(s.equals("nanny"));
// weakly typed invocation (using MHs.invoke)
-s = (String) mh.invokeVarargs("sappy", 'p', 'v');
+s = (String) mh.invokeWithArguments("sappy", 'p', 'v');
assert(s.equals("savvy"));
// mt is {Object[] => List}
mt = MethodType.methodType(java.util.List.class, Object[].class);
@@ -147,14 +186,22 @@
mt = MethodType.methodType(int.class);
mh = lookup.findVirtual(java.util.List.class, "size", mt);
// (Ljava/util/List;)I
-i = mh.<int>invokeExact(java.util.Arrays.asList(1,2,3));
+i = (int) mh.invokeExact(java.util.Arrays.asList(1,2,3));
assert(i == 3);
+mt = MethodType.methodType(void.class, String.class);
+mh = lookup.findVirtual(java.io.PrintStream.class, "println", mt);
+mh.invokeExact(System.out, "Hello, world.");
+// (Ljava/io/PrintStream;Ljava/lang/String;)V
* </pre></blockquote>
* Each of the above calls generates a single invokevirtual instruction
* with the name {@code invoke} and the type descriptors indicated in the comments.
* The argument types are taken directly from the actual arguments,
- * while the return type is taken from the type parameter.
- * (This type parameter may be a primitive, and it defaults to {@code Object}.)
+ * while the return type is taken from the cast immediately applied to the call.
+ * This cast may be to a primitive.
+ * If it is missing, the type defaults to {@code Object} if the call
+ * occurs in a context which uses the return value.
+ * If the call occurs as a statement, a cast is impossible,
+ * and there is no return type; the call is {@code void}.
* <p>
* <em>A note on generic typing:</em> Method handles do not represent
* their function types in terms of Java parameterized (generic) types,
@@ -162,7 +209,7 @@
* Java types.
* <ol>
* <li>Method types range over all possible arities,
- * from no arguments to an arbitrary number of arguments.
+ * from no arguments to up to 255 of arguments (a limit imposed by the JVM).
* Generics are not variadic, and so cannot represent this.</li>
* <li>Method types can specify arguments of primitive types,
* which Java generic types cannot range over.</li>
@@ -180,6 +227,19 @@
* fields, methods, and constructors can be represented directly
* in a class file's constant pool as constants to be loaded by {@code ldc} bytecodes.
* Loading such a constant causes the component classes of its type to be loaded as necessary.
+ * <p>
+ * Method handles cannot be subclassed by the user.
+ * Implementations may (or may not) create internal subclasses of {@code MethodHandle}
+ * which may be visible via the {@code java.lang.Object#getClass Object.getClass}
+ * operation. The programmer should not draw conclusions about a method handle
+ * from its specific class, as the method handle class hierarchy (if any)
+ * may change from time to time or across implementations from different vendors.
+ * <p>
+ * With respect to the Java Memory Model, any method handle will behave
+ * as if all of its fields are final variables. This means that any method
+ * handle made visible to the application will always be fully formed.
+ * This is true even if the method handle is published through a shared
+ * variables in a data race.
*
* @see MethodType
* @see MethodHandles
@@ -189,7 +249,6 @@
// Note: This is an implementation inheritance hack, and will be removed
// with a JVM change which moves the required hidden state onto this class.
extends MethodHandleImpl
- implements MethodHandleProvider
{
private static Access IMPL_TOKEN = Access.getToken();
@@ -208,7 +267,7 @@
/**
* Report the type of this method handle.
- * Every invocation of this method handle must exactly match this type.
+ * Every invocation of this method handle via {@code invokeExact} must exactly match this type.
* @return the method handle type
*/
public final MethodType type() {
@@ -216,12 +275,16 @@
}
/**
- * The constructor for MethodHandle may only be called by privileged code.
- * Subclasses may be in other packages, but must possess
- * a token which they obtained from MH with a security check.
- * @param token non-null object which proves access permission
- * @param type type (permanently assigned) of the new method handle
+ * <em>CONSTRUCTOR WILL BE REMOVED FOR PFD:</em>
+ * Temporary constructor in early versions of the Reference Implementation.
+ * Method handle inheritance (if any) will be contained completely within
+ * the {@code java.dyn} package.
*/
+ // The constructor for MethodHandle may only be called by privileged code.
+ // Subclasses may be in other packages, but must possess
+ // a token which they obtained from MH with a security check.
+ // @param token non-null object which proves access permission
+ // @param type type (permanently assigned) of the new method handle
protected MethodHandle(Access token, MethodType type) {
super(token);
Access.check(token);
@@ -243,92 +306,116 @@
});
}
- /** The string of a direct method handle is the simple name of its target method.
- * The string of an adapter or bound method handle is the string of its
- * target method handle.
- * The string of a Java method handle is the string of its entry point method,
- * unless the Java method handle overrides the toString method.
+ /**
+ * Returns a string representation of the method handle,
+ * starting with the string {@code "MethodHandle"} and
+ * ending with the string representation of the method handle's type.
+ * In other words, this method returns a string equal to the value of:
+ * <blockquote><pre>
+ * "MethodHandle" + type().toString()
+ * </pre></blockquote>
+ * <p>
+ * Note: Future releases of this API may add further information
+ * to the string representation.
+ * Therefore, the present syntax should not be parsed by applications.
+ *
+ * @return a string representation of the method handle
*/
@Override
public String toString() {
return MethodHandleImpl.getNameString(IMPL_TOKEN, this);
}
- //// This is the "Method Handle Kernel API" discussed at the JVM Language Summit, 9/2009.
- //// Implementations here currently delegate to statics in MethodHandles. Some of those statics
- //// will be deprecated. Others will be kept as "algorithms" to supply degrees of freedom
- //// not present in the Kernel API.
-
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Invoke the method handle, allowing any caller signature, but requiring an exact signature match.
* The signature at the call site of {@code invokeExact} must
- * exactly match this method handle's {@code type}.
+ * exactly match this method handle's {@link #type type}.
* No conversions are allowed on arguments or return values.
+ * @throws WrongMethodTypeException if the target's type is not identical with the caller's type signature
+ * @throws Throwable anything thrown by the underlying method propagates unchanged through the method handle call
*/
- public final native @PolymorphicSignature <R,A> R invokeExact(A... args) throws Throwable;
-
- // FIXME: remove this transitional form
- /** @deprecated transitional form defined in EDR but removed in PFD */
- public final native @PolymorphicSignature <R,A> R invoke(A... args) throws Throwable;
+ public final native @PolymorphicSignature Object invokeExact(Object... args) throws Throwable;
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Invoke the method handle, allowing any caller signature,
- * and performing simple conversions for arguments and return types.
- * The signature at the call site of {@code invokeGeneric} must
- * have the same arity as this method handle's {@code type}.
+ * and optionally performing conversions for arguments and return types.
* <p>
- * If the call site signature exactly matches this method handle's {@code type},
- * the call proceeds as if by {@link #invokeExact}.
+ * If the call site signature exactly matches this method handle's {@link #type type},
+ * the call proceeds as if by {@link #invokeExact invokeExact}.
* <p>
* Otherwise, the call proceeds as if this method handle were first
- * adjusted by calling {@link #asType} to adjust this method handle
+ * adjusted by calling {@link #asType asType} to adjust this method handle
* to the required type, and then the call proceeds as if by
- * {@link #invokeExact} on the adjusted method handle.
+ * {@link #invokeExact invokeExact} on the adjusted method handle.
+ * <p>
+ * There is no guarantee that the {@code asType} call is actually made.
+ * If the JVM can predict the results of making the call, it may perform
+ * adaptations directly on the caller's arguments,
+ * and call the target method handle according to its own exact type.
+ * <p>
+ * If the method handle is equipped with a
+ * {@linkplain #withTypeHandler type handler}, the handler must produce
+ * an entry point of the call site's exact type.
+ * Otherwise, the signature at the call site of {@code invokeGeneric} must
+ * be a valid argument to the standard {@code asType} method.
+ * In particular, the caller must specify the same argument arity
+ * as the callee's type.
+ * @throws WrongMethodTypeException if the target's type cannot be adjusted to the caller's type signature
+ * @throws Throwable anything thrown by the underlying method propagates unchanged through the method handle call
*/
- public final native @PolymorphicSignature <R,A> R invokeGeneric(A... args) throws Throwable;
-
- // ?? public final native @PolymorphicSignature <R,A,V> R invokeVarargs(A args, V[] varargs) throws Throwable;
+ public final native @PolymorphicSignature Object invokeGeneric(Object... args) throws Throwable;
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Perform a varargs invocation, passing the arguments in the given array
- * to the method handle, as if via {@link #invokeGeneric} from a call site
+ * to the method handle, as if via {@link #invokeGeneric invokeGeneric} from a call site
* which mentions only the type {@code Object}, and whose arity is the length
* of the argument array.
* <p>
- * The length of the arguments array must equal the parameter count
- * of the target's type.
- * The arguments array is spread into separate arguments.
+ * Specifically, execution proceeds as if by the following steps,
+ * although the methods are not guaranteed to be called if the JVM
+ * can predict their effects.
+ * <ul>
+ * <li>Determine the length of the argument array as {@code N}.
+ * For a null reference, {@code N=0}. </li>
+ * <li>Determine the generic type {@code TN} of {@code N} arguments as
+ * as {@code TN=MethodType.genericMethodType(N)}.</li>
+ * <li>Force the original target method handle {@code MH0} to the
+ * required type, as {@code MH1 = MH0.asType(TN)}. </li>
+ * <li>Spread the array into {@code N} separate arguments {@code A0, ...}. </li>
+ * <li>Invoke the type-adjusted method handle on the unpacked arguments:
+ * MH1.invokeExact(A0, ...). </li>
+ * <li>Take the return value as an {@code Object} reference. </li>
+ * </ul>
* <p>
- * In order to match the type of the target, the following argument
+ * Because of the action of the {@code asType} step, the following argument
* conversions are applied as necessary:
* <ul>
* <li>reference casting
* <li>unboxing
+ * <li>widening primitive conversions
* </ul>
- * The following conversions are not applied:
- * <ul>
- * <li>primitive conversions (e.g., {@code byte} to {@code int}
- * <li>varargs conversions other than the initial spread
- * <li>any application-specific conversions (e.g., string to number)
- * </ul>
+ * <p>
* The result returned by the call is boxed if it is a primitive,
* or forced to null if the return type is void.
* <p>
* This call is equivalent to the following code:
* <p><blockquote><pre>
- * MethodHandle invoker = MethodHandles.genericInvoker(this.type(), 0, true);
- * Object result = invoker.invokeExact(this, arguments);
+ * MethodHandle invoker = MethodHandles.varargsInvoker(this.type(), 0);
+ * Object result = invoker.invokeExact(this, arguments);
* </pre></blockquote>
* @param arguments the arguments to pass to the target
* @return the result returned by the target
- * @see MethodHandles#genericInvoker
+ * @throws WrongMethodTypeException if the target's type cannot be adjusted to take the arguments
+ * @throws Throwable anything thrown by the target method invocation
+ * @see MethodHandles#varargsInvoker
*/
- public final Object invokeVarargs(Object... arguments) throws Throwable {
+ public final Object invokeWithArguments(Object... arguments) throws Throwable {
int argc = arguments == null ? 0 : arguments.length;
MethodType type = type();
+ if (type.parameterCount() != argc) {
+ // simulate invokeGeneric
+ return asType(MethodType.genericMethodType(argc)).invokeWithArguments(arguments);
+ }
if (argc <= 10) {
MethodHandle invoker = MethodHandles.invokers(type).genericInvoker();
switch (argc) {
@@ -372,99 +459,70 @@
MethodHandle invoker = MethodHandles.invokers(type).varargsInvoker(0);
return invoker.invokeExact(this, arguments);
}
- /** Equivalent to {@code invokeVarargs(arguments.toArray())}. */
+ /** Equivalent to {@code invokeWithArguments(arguments.toArray())}. */
+ public final Object invokeWithArguments(java.util.List<?> arguments) throws Throwable {
+ return invokeWithArguments(arguments.toArray());
+ }
+ @Deprecated
+ public final Object invokeVarargs(Object... arguments) throws Throwable {
+ return invokeWithArguments(arguments);
+ }
+ @Deprecated
public final Object invokeVarargs(java.util.List<?> arguments) throws Throwable {
- return invokeVarargs(arguments.toArray());
+ return invokeWithArguments(arguments.toArray());
}
- /* --- this is intentionally NOT a javadoc yet ---
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
+ /**
* Produce an adapter method handle which adapts the type of the
- * current method handle to a new type by pairwise argument conversion.
- * The original type and new type must have the same number of arguments.
- * The resulting method handle is guaranteed to confess a type
+ * current method handle to a new type
+ * The resulting method handle is guaranteed to report a type
* which is equal to the desired new type.
* <p>
* If the original type and new type are equal, returns {@code this}.
* <p>
- * The following conversions are applied as needed both to
- * arguments and return types. Let T0 and T1 be the differing
- * new and old parameter types (or old and new return types)
- * for corresponding values passed by the new and old method types.
- * Given those types T0, T1, one of the following conversions is applied
- * if possible:
- * <ul>
- * <li>If T0 and T1 are references, and T1 is not an interface type,
- * then a cast to T1 is applied.
- * (The types do not need to be related in any particular way.)
- * <li>If T0 and T1 are references, and T1 is an interface type,
- * then the value of type T0 is passed as a T1 without a cast.
- * (This treatment of interfaces follows the usage of the bytecode verifier.)
- * <li>If T0 and T1 are primitives, then a Java casting
- * conversion (JLS 5.5) is applied, if one exists.
- * <li>If T0 and T1 are primitives and one is boolean,
- * the boolean is treated as a one-bit unsigned integer.
- * (This treatment follows the usage of the bytecode verifier.)
- * A conversion from another primitive type behaves as if
- * it first converts to byte, and then masks all but the low bit.
- * <li>If T0 is a primitive and T1 a reference, a boxing
- * conversion is applied if one exists, possibly followed by
- * an reference conversion to a superclass.
- * T1 must be a wrapper class or a supertype of one.
- * If T1 is a wrapper class, T0 is converted if necessary
- * to T1's primitive type by one of the preceding conversions.
- * Otherwise, T0 is boxed, and its wrapper converted to T1.
- * <li>If T0 is a reference and T1 a primitive, an unboxing
- * conversion is applied if one exists, possibly preceded by
- * a reference conversion to a wrapper class.
- * T0 must be a wrapper class or a supertype of one.
- * If T0 is a wrapper class, its primitive value is converted
- * if necessary to T1 by one of the preceding conversions.
- * Otherwise, T0 is converted directly to the wrapper type for T1,
- * which is then unboxed.
- * <li>If the return type T1 is void, any returned value is discarded
- * <li>If the return type T0 is void and T1 a reference, a null value is introduced.
- * <li>If the return type T0 is void and T1 a primitive, a zero value is introduced.
- * </ul>
+ * This method provides the crucial behavioral difference between
+ * {@link #invokeExact invokeExact} and {@link #invokeGeneric invokeGeneric}. The two methods
+ * perform the same steps when the caller's type descriptor is identical
+ * with the callee's, but when the types differ, {@link #invokeGeneric invokeGeneric}
+ * also calls {@code asType} (or some internal equivalent) in order
+ * to match up the caller's and callee's types.
* <p>
- */
- /**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
- * Produce an adapter method handle which adapts the type of the
- * current method handle to a new type by pairwise argument conversion.
- * The original type and new type must have the same number of arguments.
- * The resulting method handle is guaranteed to confess a type
- * which is equal to the desired new type.
+ * This method is equivalent to {@link MethodHandles#convertArguments convertArguments},
+ * except for method handles produced by {@link #withTypeHandler withTypeHandler},
+ * in which case the specified type handler is used for calls to {@code asType}.
* <p>
- * If the original type and new type are equal, returns {@code this}.
- * <p>
- * This method is equivalent to {@link MethodHandles#convertArguments}.
+ * Note that the default behavior of {@code asType} only performs
+ * pairwise argument conversion and return value conversion.
+ * Because of this, unless the method handle has a type handler,
+ * the original type and new type must have the same number of arguments.
+ *
* @param newType the expected type of the new method handle
* @return a method handle which delegates to {@code this} after performing
* any necessary argument conversions, and arranges for any
* necessary return value conversions
- * @throws IllegalArgumentException if the conversion cannot be made
+ * @throws WrongMethodTypeException if the conversion cannot be made
* @see MethodHandles#convertArguments
*/
- public final MethodHandle asType(MethodType newType) {
+ public MethodHandle asType(MethodType newType) {
return MethodHandles.convertArguments(this, newType);
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle which adapts, as its <i>target</i>,
* the current method handle. The type of the adapter will be
- * the same as the type of the target, except that all but the first
- * {@code keepPosArgs} parameters of the target's type are replaced
- * by a single array parameter of type {@code Object[]}.
- * Thus, if {@code keepPosArgs} is zero, the adapter will take all
- * arguments in a single object array.
+ * the same as the type of the target, except that the final
+ * {@code arrayLength} parameters of the target's type are replaced
+ * by a single array parameter of type {@code arrayType}.
+ * <p>
+ * If the array element type differs from any of the corresponding
+ * argument types on original target,
+ * the original target is adapted to take the array elements directly,
+ * as if by a call to {@link #asType asType}.
* <p>
* When called, the adapter replaces a trailing array argument
* by the array's elements, each as its own argument to the target.
* (The order of the arguments is preserved.)
* They are converted pairwise by casting and/or unboxing
- * (as if by {@link MethodHandles#convertArguments})
* to the types of the trailing parameters of the target.
* Finally the target is called.
* What the target eventually returns is returned unchanged by the adapter.
@@ -473,54 +531,67 @@
* contains exactly enough elements to provide a correct argument count
* to the target method handle.
* (The array may also be null when zero elements are required.)
- * @param keepPosArgs the number of leading positional arguments to preserve
- * @return a new method handle which spreads its final argument,
+ * @param arrayType usually {@code Object[]}, the type of the array argument from which to extract the spread arguments
+ * @param arrayLength the number of arguments to spread from an incoming array argument
+ * @return a new method handle which spreads its final array argument,
* before calling the original method handle
+ * @throws IllegalArgumentException if {@code arrayType} is not an array type
* @throws IllegalArgumentException if target does not have at least
- * {@code keepPosArgs} parameter types
+ * {@code arrayLength} parameter types
+ * @throws WrongMethodTypeException if the implied {@code asType} call fails
*/
- public final MethodHandle asSpreader(int keepPosArgs) {
+ public final MethodHandle asSpreader(Class<?> arrayType, int arrayLength) {
+ Class<?> arrayElement = arrayType.getComponentType();
+ if (arrayElement == null) throw newIllegalArgumentException("not an array type");
MethodType oldType = type();
int nargs = oldType.parameterCount();
+ if (nargs < arrayLength) throw newIllegalArgumentException("bad spread array length");
+ int keepPosArgs = nargs - arrayLength;
MethodType newType = oldType.dropParameterTypes(keepPosArgs, nargs);
- newType = newType.insertParameterTypes(keepPosArgs, Object[].class);
+ newType = newType.insertParameterTypes(keepPosArgs, arrayType);
return MethodHandles.spreadArguments(this, newType);
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle which adapts, as its <i>target</i>,
* the current method handle. The type of the adapter will be
* the same as the type of the target, except that a single trailing
- * array parameter of type {@code Object[]} is replaced by
- * {@code spreadArrayArgs} parameters of type {@code Object}.
+ * parameter (usually of type {@code arrayType}) is replaced by
+ * {@code arrayLength} parameters whose type is element type of {@code arrayType}.
* <p>
- * When called, the adapter replaces its trailing {@code spreadArrayArgs}
- * arguments by a single new {@code Object} array, whose elements
+ * If the array type differs from the final argument type on original target,
+ * the original target is adapted to take the array type directly,
+ * as if by a call to {@link #asType asType}.
+ * <p>
+ * When called, the adapter replaces its trailing {@code arrayLength}
+ * arguments by a single new array of type {@code arrayType}, whose elements
* comprise (in order) the replaced arguments.
* Finally the target is called.
* What the target eventually returns is returned unchanged by the adapter.
* <p>
- * (The array may also be a shared constant when {@code spreadArrayArgs} is zero.)
- * @param spreadArrayArgs the number of arguments to spread from the trailing array
+ * (The array may also be a shared constant when {@code arrayLength} is zero.)
+ * @param arrayType usually {@code Object[]}, the type of the array argument which will collect the arguments
+ * @param arrayLength the number of arguments to collect into a new array argument
* @return a new method handle which collects some trailing argument
* into an array, before calling the original method handle
- * @throws IllegalArgumentException if the last argument of the target
- * is not {@code Object[]}
- * @throws IllegalArgumentException if {@code spreadArrayArgs} is not
+ * @throws IllegalArgumentException if {@code arrayType} is not an array type
+ or {@code arrayType} is not assignable to this method handle's trailing parameter type
+ * @throws IllegalArgumentException if {@code arrayLength} is not
* a legal array size
- * @deprecated Provisional and unstable; use {@link MethodHandles#collectArguments}.
+ * @throws WrongMethodTypeException if the implied {@code asType} call fails
*/
- public final MethodHandle asCollector(int spreadArrayArgs) {
+ public final MethodHandle asCollector(Class<?> arrayType, int arrayLength) {
+ Class<?> arrayElement = arrayType.getComponentType();
+ if (arrayElement == null) throw newIllegalArgumentException("not an array type");
MethodType oldType = type();
int nargs = oldType.parameterCount();
MethodType newType = oldType.dropParameterTypes(nargs-1, nargs);
- newType = newType.insertParameterTypes(nargs-1, MethodType.genericMethodType(spreadArrayArgs).parameterArray());
+ newType = newType.insertParameterTypes(nargs-1,
+ java.util.Collections.<Class<?>>nCopies(arrayLength, arrayElement));
return MethodHandles.collectArguments(this, newType);
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle which binds the given argument
* to the current method handle as <i>target</i>.
* The type of the bound handle will be
@@ -541,15 +612,81 @@
* leading parameter type that is a reference type
* @throws ClassCastException if {@code x} cannot be converted
* to the leading parameter type of the target
- * @deprecated Provisional and unstable; use {@link MethodHandles#insertArguments}.
+ * @see MethodHandles#insertArguments
*/
public final MethodHandle bindTo(Object x) {
return MethodHandles.insertArguments(this, 0, x);
}
- /** Implementation of {@link MethodHandleProvider}, which returns {@code this}. */
- public final MethodHandle asMethodHandle() { return this; }
+ /**
+ * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
+ * Create a new method handle with the same type as this one,
+ * but whose {@code asType} method invokes the given
+ * {@code typeHandler} on this method handle,
+ * instead of the standard {@code MethodHandles.convertArguments}.
+ * <p>
+ * The new method handle will have the same behavior as the
+ * old one when invoked by {@code invokeExact}.
+ * For {@code invokeGeneric} calls which exactly match
+ * the method type, the two method handles will also
+ * have the same behavior.
+ * For other {@code invokeGeneric} calls, the {@code typeHandler}
+ * will control the behavior of the new method handle.
+ * <p>
+ * Thus, a method handle with an {@code asType} handler can
+ * be configured to accept more than one arity of {@code invokeGeneric}
+ * call, and potentially every possible arity.
+ * It can also be configured to supply default values for
+ * optional arguments, when the caller does not specify them.
+ * <p>
+ * The given method handle must take two arguments and return
+ * one result. The result it returns must be a method handle
+ * of exactly the requested type. If the result returned by
+ * the target is null, a {@link NullPointerException} is thrown,
+ * else if the type of the target does not exactly match
+ * the requested type, a {@link WrongMethodTypeException} is thrown.
+ * <p>
+ * A method handle's type handler is not guaranteed to be called every
+ * time its {@code asType} or {@code invokeGeneric} method is called.
+ * If the implementation is faced is able to prove that an equivalent
+ * type handler call has already occurred (on the same two arguments),
+ * it may substitute the result of that previous invocation, without
+ * making a new invocation. Thus, type handlers should not (in general)
+ * perform significant side effects.
+ * <p>
+ * Therefore, the type handler is invoked as if by this code:
+ * <blockquote><pre>
+ * MethodHandle target = this; // original method handle
+ * MethodHandle adapter = ...; // adapted method handle
+ * MethodType requestedType = ...; // argument to asType()
+ * if (type().equals(requestedType))
+ * return adapter;
+ * MethodHandle result = (MethodHandle)
+ * typeHandler.invokeGeneric(target, requestedType);
+ * if (!result.type().equals(requestedType))
+ * throw new WrongMethodTypeException();
+ * return result;
+ * </pre></blockquote>
+ * <p>
+ * For example, here is a list-making variable-arity method handle:
+ * <blockquote><pre>
+MethodHandle makeEmptyList = MethodHandles.constant(List.class, Arrays.asList());
+MethodHandle asList = lookup()
+ .findStatic(Arrays.class, "asList", methodType(List.class, Object[].class));
+static MethodHandle collectingTypeHandler(MethodHandle base, MethodType newType) {
+ return asList.asCollector(Object[].class, newType.parameterCount()).asType(newType);
+}
+MethodHandle collectingTypeHandler = lookup()
+ .findStatic(lookup().lookupClass(), "collectingTypeHandler",
+ methodType(MethodHandle.class, MethodHandle.class, MethodType.class));
+MethodHandle makeAnyList = makeEmptyList.withTypeHandler(collectingTypeHandler);
- /** Implementation of {@link MethodHandleProvider}, which returns {@code this.asType(type)}. */
- public final MethodHandle asMethodHandle(MethodType type) { return this.asType(type); }
+assertEquals("[]", makeAnyList.invokeGeneric().toString());
+assertEquals("[1]", makeAnyList.invokeGeneric(1).toString());
+assertEquals("[two, too]", makeAnyList.invokeGeneric("two", "too").toString());
+ * <pre><blockquote>
+ */
+ public MethodHandle withTypeHandler(MethodHandle typeHandler) {
+ return MethodHandles.withTypeHandler(this, typeHandler);
+ }
}
--- a/jdk/src/share/classes/java/dyn/MethodHandleProvider.java Tue Dec 21 15:27:55 2010 -0800
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,80 +0,0 @@
-/*
- * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package java.dyn;
-
-/**
- * An interface for an object to provide a target {@linkplain MethodHandle method handle} to a {@code invokedynamic} instruction.
- * There are many function-like objects in various Java APIs.
- * This interface provides a standard way for such function-like objects to be bound
- * to a dynamic call site, by providing a view of their behavior in the form of a low-level method handle.
- * <p>
- * The type {@link MethodHandle} is a concrete class whose implementation
- * hierarchy (if any) may be tightly coupled to the underlying JVM implementation.
- * It cannot also serve as a base type for user-defined functional APIs.
- * For this reason, {@code MethodHandle} cannot be subclassed to add new
- * behavior to method handles. But this interface can be used to provide
- * a link between a user-defined function and the {@code invokedynamic}
- * instruction and the method handle API.
- */
-public interface MethodHandleProvider {
- /** Produce a method handle which will serve as a behavioral proxy for the current object.
- * The type and invocation behavior of the proxy method handle are user-defined,
- * and should have some relation to the intended meaning of the original object itself.
- * <p>
- * The current object may have a changeable behavior.
- * For example, {@link CallSite} has a {@code setTarget} method which changes its invocation.
- * In such a case, it is <em>incorrect</em> for {@code asMethodHandle} to return
- * a method handle whose behavior may diverge from that of the current object.
- * Rather, the returned method handle must stably and permanently access
- * the behavior of the current object, even if that behavior is changeable.
- * <p>
- * The reference identity of the proxy method handle is not guaranteed to
- * have any particular relation to the reference identity of the object.
- * In particular, several objects with the same intended meaning could
- * share a common method handle, or the same object could return different
- * method handles at different times. In the latter case, the different
- * method handles should have the same type and invocation behavior,
- * and be usable from any thread at any time.
- * In particular, if a MethodHandleProvider is bound to an <code>invokedynamic</code>
- * call site, the proxy method handle extracted at the time of binding
- * will be used for an unlimited time, until the call site is rebound.
- * <p>
- * The type {@link MethodHandle} itself implements {@code MethodHandleProvider}, and
- * for this method simply returns {@code this}.
- */
- public MethodHandle asMethodHandle();
-
- /** Produce a method handle of a given type which will serve as a behavioral proxy for the current object.
- * As for the no-argument version {@link #asMethodHandle()}, the invocation behavior of the
- * proxy method handle is user-defined. But the type must be the given type,
- * or else a {@link WrongMethodTypeException} must be thrown.
- * <p>
- * If the current object somehow represents a variadic or overloaded behavior,
- * the method handle returned for a given type might represent only a subset of
- * the current object's repertoire of behaviors, which correspond to that type.
- */
- public MethodHandle asMethodHandle(MethodType type) throws WrongMethodTypeException;
-}
--- a/jdk/src/share/classes/java/dyn/MethodHandles.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/java/dyn/MethodHandles.java Tue Dec 21 18:45:45 2010 -0800
@@ -29,6 +29,7 @@
import sun.dyn.Access;
import sun.dyn.MemberName;
import sun.dyn.MethodHandleImpl;
+import sun.dyn.util.ValueConversions;
import sun.dyn.util.VerifyAccess;
import sun.dyn.util.Wrapper;
import java.util.List;
@@ -135,28 +136,58 @@
* In general, the conditions under which a method handle may be
* created for a method {@code M} are exactly as restrictive as the conditions
* under which the lookup class could have compiled a call to {@code M}.
- * This rule is applied even if the Java compiler might have created
+ * <p>
+ * In some cases, this access is obtained by the Java compiler by creating
* an wrapper method to access a private method of another class
* in the same top-level declaration.
- * For example, a lookup object created for a nested class {@code C.D}
+ * For example, a nested class {@code C.D}
* can access private members within other related classes such as
- * {@code C}, {@code C.D.E}, or {@code C.B}.
+ * {@code C}, {@code C.D.E}, or {@code C.B},
+ * but the Java compiler may need to generate wrapper methods in
+ * those related classes. In such cases, a {@code Lookup} object on
+ * {@code C.E} would be unable to those private members.
+ * A workaround for this limitation is the {@link Lookup#in Lookup.in} method,
+ * which can transform a lookup on {@code C.E} into one on any of those other
+ * classes, without special elevation of privilege.
*/
public static final
class Lookup {
/** The class on behalf of whom the lookup is being performed. */
private final Class<?> lookupClass;
- /** The allowed sorts of members which may be looked up (public, etc.), with STATIC for package. */
+ /** The allowed sorts of members which may be looked up (PUBLIC, etc.). */
private final int allowedModes;
- private static final int
- PUBLIC = Modifier.PUBLIC,
- PACKAGE = Modifier.STATIC,
- PROTECTED = Modifier.PROTECTED,
- PRIVATE = Modifier.PRIVATE,
- ALL_MODES = (PUBLIC | PACKAGE | PROTECTED | PRIVATE),
- TRUSTED = -1;
+ /** A single-bit mask representing {@code public} access,
+ * which may contribute to the result of {@link #lookupModes lookupModes}.
+ * The value, {@code 0x01}, happens to be the same as the value of the
+ * {@code public} {@linkplain java.lang.reflect.Modifier#PUBLIC modifier bit}.
+ */
+ public static final int PUBLIC = Modifier.PUBLIC;
+
+ /** A single-bit mask representing {@code private} access,
+ * which may contribute to the result of {@link #lookupModes lookupModes}.
+ * The value, {@code 0x02}, happens to be the same as the value of the
+ * {@code private} {@linkplain java.lang.reflect.Modifier#PRIVATE modifier bit}.
+ */
+ public static final int PRIVATE = Modifier.PRIVATE;
+
+ /** A single-bit mask representing {@code protected} access,
+ * which may contribute to the result of {@link #lookupModes lookupModes}.
+ * The value, {@code 0x04}, happens to be the same as the value of the
+ * {@code protected} {@linkplain java.lang.reflect.Modifier#PROTECTED modifier bit}.
+ */
+ public static final int PROTECTED = Modifier.PROTECTED;
+
+ /** A single-bit mask representing {@code package} access (default access),
+ * which may contribute to the result of {@link #lookupModes lookupModes}.
+ * The value is {@code 0x08}, which does not correspond meaningfully to
+ * any particular {@linkplain java.lang.reflect.Modifier modifier bit}.
+ */
+ public static final int PACKAGE = Modifier.STATIC;
+
+ private static final int ALL_MODES = (PUBLIC | PRIVATE | PROTECTED | PACKAGE);
+ private static final int TRUSTED = -1;
private static int fixmods(int mods) {
mods &= (ALL_MODES - PACKAGE);
@@ -181,13 +212,21 @@
}
/** Which types of members can this lookup object produce?
- * The result is a bit-mask of the {@link Modifier} bits
- * {@linkplain Modifier#PUBLIC PUBLIC (0x01)},
- * {@linkplain Modifier#PROTECTED PROTECTED (0x02)},
- * {@linkplain Modifier#PRIVATE PRIVATE (0x04)},
- * and {@linkplain Modifier#STATIC STATIC (0x08)}.
- * The modifier bit {@code STATIC} stands in for the package protection mode,
- * which does not have an explicit modifier bit.
+ * The result is a bit-mask of the bits
+ * {@linkplain #PUBLIC PUBLIC (0x01)},
+ * {@linkplain #PRIVATE PRIVATE (0x02)},
+ * {@linkplain #PROTECTED PROTECTED (0x04)},
+ * and {@linkplain #PACKAGE PACKAGE (0x08)}.
+ * <p>
+ * A freshly-created lookup object
+ * on the {@linkplain java.dyn.MethodHandles#lookup() caller's class}
+ * has all possible bits set, since the caller class can access all its own members.
+ * A lookup object on a new lookup class
+ * {@linkplain java.dyn.MethodHandles.Lookup#in created from a previous lookup object}
+ * may have some mode bits set to zero.
+ * The purpose of this is to restrict access via the new lookup object,
+ * so that it can access only names which can be reached by the original
+ * lookup object, and also by the new lookup class.
*/
public int lookupModes() {
return allowedModes & ALL_MODES;
@@ -220,18 +259,21 @@
/**
* Create a lookup on the specified new lookup class.
* The resulting object will report the specified
- * class as its own {@link #lookupClass}.
+ * class as its own {@link #lookupClass lookupClass}.
* <p>
* However, the resulting {@code Lookup} object is guaranteed
* to have no more access capabilities than the original.
- * In particular:<ul>
+ * In particular, access capabilities can be lost as follows:<ul>
* <li>If the new lookup class differs from the old one,
* protected members will not be accessible by virtue of inheritance.
+ * (Protected members may continue to be accessible because of package sharing.)
* <li>If the new lookup class is in a different package
* than the old one, protected and default (package) members will not be accessible.
* <li>If the new lookup class is not within the same package member
* as the old one, private members will not be accessible.
- * <li>In all cases, public members will continue to be accessible.
+ * <li>If the new lookup class is not accessible to the old lookup class,
+ * then no members, not even public members, will be accessible.
+ * (In all other cases, public members will continue to be accessible.)
* </ul>
*/
public Lookup in(Class<?> requestedLookupClass) {
@@ -245,10 +287,17 @@
&& !VerifyAccess.isSamePackage(this.lookupClass, requestedLookupClass)) {
newModes &= ~(PACKAGE|PRIVATE);
}
+ // Allow nestmate lookups to be created without special privilege:
if ((newModes & PRIVATE) != 0
&& !VerifyAccess.isSamePackageMember(this.lookupClass, requestedLookupClass)) {
newModes &= ~PRIVATE;
}
+ if (newModes == PUBLIC
+ && !VerifyAccess.isClassAccessible(requestedLookupClass, this.lookupClass)) {
+ // The requested class it not accessible from the lookup class.
+ // No permissions.
+ newModes = 0;
+ }
checkUnprivilegedlookupClass(requestedLookupClass);
return new Lookup(requestedLookupClass, newModes);
}
@@ -272,35 +321,43 @@
throw newIllegalArgumentException("illegal lookupClass: "+lookupClass);
}
- /** Display the name of the class.
- * If there are restrictions on the access permitted to this lookup,
- * display those also.
+ /**
+ * Display the name of the class from which lookups are to be made.
+ * (The name is the one reported by {@link java.lang.Class#getName() Class.getName}.)
+ * If there are restrictions on the access permitted to this lookup,
+ * this is indicated by adding a suffix to the class name, consisting
+ * of a slash and a keyword. The keyword is chosen as follows:
+ * <ul>
+ * <li>If no access is allowed, the suffix is "/noaccess".
+ * <li>If only public access is allowed, the suffix is "/public".
+ * <li>If only public and package access are allowed, the suffix is "/package".
+ * <li>If only public, package, and private access are allowed, the suffix is "/private".
+ * </ul>
+ * If none of the above cases apply, it is the case that full
+ * access (public, package, private, and protected) is allowed.
+ * In this case, no suffix is added.
+ * This is true only of an object obtained originally from
+ * {@link java.dyn.MethodHandles#lookup() MethodHandles.lookup}.
+ * Objects created by {@link java.dyn.MethodHandles.Lookup#in() Lookup#in}
+ * always have restricted access, and will display a suffix.
*/
@Override
public String toString() {
- String modestr;
String cname = lookupClass.getName();
switch (allowedModes) {
case TRUSTED:
- return "/trusted";
+ return "/trusted"; // internal only
case PUBLIC:
- modestr = "/public";
- if (lookupClass == Object.class)
- return modestr;
- break;
+ return cname + "/public";
case PUBLIC|PACKAGE:
return cname + "/package";
- case 0: // should not happen
- return cname + "/empty";
+ case 0: // no privileges
+ return cname + "/noaccess";
case ALL_MODES:
return cname;
+ default:
+ return cname + "/private";
}
- StringBuilder buf = new StringBuilder(cname);
- if ((allowedModes & PUBLIC) != 0) buf.append("/public");
- if ((allowedModes & PACKAGE) != 0) buf.append("/package");
- if ((allowedModes & PROTECTED) != 0) buf.append("/protected");
- if ((allowedModes & PRIVATE) != 0) buf.append("/private");
- return buf.toString();
}
// call this from an entry point method in Lookup with extraFrames=0.
@@ -326,7 +383,6 @@
* @param name the name of the method
* @param type the type of the method
* @return the desired method handle
- * @exception SecurityException <em>TBD</em>
* @exception NoAccessException if the method does not exist or access checking fails
*/
public
@@ -342,13 +398,6 @@
* with the receiver type (usually {@code refc}) prepended.
* The method and all its argument types must be accessible to the lookup class.
* <p>
- * (<em>BUG NOTE:</em> The type {@code Object} may be prepended instead
- * of the receiver type, if the receiver type is not on the boot class path.
- * This is due to a temporary JVM limitation, in which MethodHandle
- * claims to be unable to access such classes. To work around this
- * bug, use {@code convertArguments} to normalize the type of the leading
- * argument to a type on the boot class path, such as {@code Object}.)
- * <p>
* When called, the handle will treat the first argument as a receiver
* and dispatch on the receiver's type to determine which method
* implementation to enter.
@@ -358,7 +407,6 @@
* @param name the name of the method
* @param type the type of the method, with the receiver argument omitted
* @return the desired method handle
- * @exception SecurityException <em>TBD</em>
* @exception NoAccessException if the method does not exist or access checking fails
*/
public MethodHandle findVirtual(Class<?> refc, String name, MethodType type) throws NoAccessException {
@@ -382,7 +430,6 @@
* @param refc the class or interface from which the method is accessed
* @param type the type of the method, with the receiver argument omitted, and a void return type
* @return the desired method handle
- * @exception SecurityException <em>TBD</em>
* @exception NoAccessException if the method does not exist or access checking fails
*/
public MethodHandle findConstructor(Class<?> refc, MethodType type) throws NoAccessException {
@@ -409,13 +456,13 @@
* {@code invokespecial} instruction.)
* <p>
* If the explicitly specified caller class is not identical with the
- * lookup class, a security check TBD is performed.
+ * lookup class, or if this lookup object does not have private access
+ * privileges, the access fails.
* @param refc the class or interface from which the method is accessed
* @param name the name of the method (which must not be "<init>")
* @param type the type of the method, with the receiver argument omitted
* @param specialCaller the proposed calling class to perform the {@code invokespecial}
* @return the desired method handle
- * @exception SecurityException <em>TBD</em>
* @exception NoAccessException if the method does not exist or access checking fails
*/
public MethodHandle findSpecial(Class<?> refc, String name, MethodType type,
@@ -428,7 +475,6 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle giving read access to a non-static field.
* The type of the method handle will have a return type of the field's
* value type.
@@ -445,7 +491,6 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle giving write access to a non-static field.
* The type of the method handle will have a void return type.
* The method handle will take two arguments, the instance containing
@@ -462,7 +507,6 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle giving read access to a static field.
* The type of the method handle will have a return type of the field's
* value type.
@@ -478,7 +522,6 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle giving write access to a static field.
* The type of the method handle will have a void return type.
* The method handle will take a single
@@ -515,7 +558,6 @@
* @param name the name of the method
* @param type the type of the method, with the receiver argument omitted
* @return the desired method handle
- * @exception SecurityException <em>TBD</em>
* @exception NoAccessException if the method does not exist or access checking fails
*/
public MethodHandle bind(Object receiver, String name, MethodType type) throws NoAccessException {
@@ -530,7 +572,6 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Make a direct method handle to <i>m</i>, if the lookup class has permission.
* If <i>m</i> is non-static, the receiver argument is treated as an initial argument.
* If <i>m</i> is virtual, overriding is respected on every call.
@@ -554,7 +595,6 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle for a reflected method.
* It will bypass checks for overriding methods on the receiver,
* as if by a {@code invokespecial} instruction from within the {@code specialCaller}.
@@ -579,7 +619,6 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle for a reflected constructor.
* The type of the method handle will be that of the constructor,
* with the return type changed to the declaring class.
@@ -602,7 +641,6 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle giving read access to a reflected field.
* The type of the method handle will have a return type of the field's
* value type.
@@ -620,7 +658,6 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle giving write access to a reflected field.
* The type of the method handle will have a void return type.
* If the field is static, the method handle will take a single
@@ -681,7 +718,7 @@
int allowedModes = this.allowedModes;
if (allowedModes == TRUSTED) return;
int mods = m.getModifiers();
- if (Modifier.isPublic(mods) && Modifier.isPublic(refc.getModifiers()))
+ if (Modifier.isPublic(mods) && Modifier.isPublic(refc.getModifiers()) && allowedModes != 0)
return; // common case
int requestedModes = fixmods(mods); // adjust 0 => PACKAGE
if ((requestedModes & allowedModes) != 0
@@ -706,6 +743,8 @@
return "access to public member failed"; // (how?)
else if (allowedModes == PUBLIC)
return "member is not public";
+ else if (allowedModes == 0)
+ return "attempted member access through a non-public class";
if (Modifier.isPrivate(mods))
return "member is private";
if (Modifier.isProtected(mods))
@@ -713,9 +752,14 @@
return "member is private to package";
}
+ private static final boolean ALLOW_NESTMATE_ACCESS = false;
+
void checkSpecialCaller(Class<?> specialCaller) throws NoAccessException {
if (allowedModes == TRUSTED) return;
- if (!VerifyAccess.isSamePackageMember(specialCaller, lookupClass()))
+ if ((allowedModes & PRIVATE) == 0
+ || (specialCaller != lookupClass()
+ && !(ALLOW_NESTMATE_ACCESS &&
+ VerifyAccess.isSamePackageMember(specialCaller, lookupClass()))))
throw newNoAccessException("no private access for invokespecial",
new MemberName(specialCaller), lookupClass());
}
@@ -725,7 +769,9 @@
// on itself or a subclass. Enforce that restriction, from JVMS 5.4.4, etc.
if (!method.isProtected() || method.isStatic()
|| allowedModes == TRUSTED
- || VerifyAccess.isSamePackageMember(method.getDeclaringClass(), lookupClass()))
+ || method.getDeclaringClass() == lookupClass()
+ || (ALLOW_NESTMATE_ACCESS &&
+ VerifyAccess.isSamePackageMember(method.getDeclaringClass(), lookupClass())))
return mh;
else
return restrictReceiver(method, mh, lookupClass());
@@ -765,7 +811,6 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle giving read access to elements of an array.
* The type of the method handle will have a return type of the array's
* element type. Its first argument will be the array type,
@@ -780,7 +825,6 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle giving write access to elements of an array.
* The type of the method handle will have a void return type.
* Its last argument will be the array's element type.
@@ -796,25 +840,6 @@
/// method handle invocation (reflective style)
/**
- * @deprecated Alias for MethodHandle.invokeVarargs.
- */
- @Deprecated
- public static
- Object invokeVarargs(MethodHandle target, Object... arguments) throws Throwable {
- return target.invokeVarargs(arguments);
- }
-
- /**
- * @deprecated Alias for MethodHandle.invokeVarargs.
- */
- @Deprecated
- public static
- Object invoke(MethodHandle target, Object... arguments) throws Throwable {
- return target.invokeVarargs(arguments);
- }
-
- /**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle which will invoke any method handle of the
* given type on a standard set of {@code Object} type arguments.
* The resulting invoker will be a method handle with the following
@@ -823,18 +848,28 @@
* <li>a single {@code MethodHandle} target
* <li>zero or more {@code Object} values (one for each argument in {@code type})
* </ul>
- * The invoker will apply reference casts as necessary and unbox primitive arguments,
- * as if by {@link #convertArguments}.
+ * <p>
+ * The invoker will behave like a call to {@link MethodHandle.invokeGeneric} with
+ * the indicated {@code type}.
+ * That is, if the target is exactly of the given {@code type}, it will behave
+ * like {@code invokeExact}; otherwise it behave as if {@link MethodHandle.asType}
+ * is used to convert the target to the required {@code type}.
+ * <p>
+ * The type of the returned invoker will not be the given {@code type}, but rather
+ * will have all parameter and return types replaced by {@code Object}.
+ * <p>
+ * Before invoking its target, the invoker will apply reference casts as
+ * necessary and unbox and widen primitive arguments, as if by {@link #convertArguments}.
* The return value of the invoker will be an {@code Object} reference,
* boxing a primitive value if the original type returns a primitive,
* and always null if the original type returns void.
* <p>
* This method is equivalent to the following code (though it may be more efficient):
* <p><blockquote><pre>
- * MethodHandle invoker = exactInvoker(type);
+ * MethodHandle invoker = lookup().findVirtual(MethodHandle.class, "invokeGeneric", type);
* MethodType genericType = type.generic();
* genericType = genericType.insertParameterType(0, MethodHandle.class);
- * return convertArguments(invoker, genericType);
+ * return invoker.asType(genericType);
* </pre></blockquote>
* @param type the type of target methods which the invoker will apply to
* @return a method handle suitable for invoking any method handle of the given type
@@ -845,9 +880,8 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle which will invoke any method handle of the
- * given type on a standard set of {@code Object} type arguments
+ * given {@code type} on a standard set of {@code Object} type arguments
* and a single trailing {@code Object[]} array.
* The resulting invoker will be a method handle with the following
* arguments:
@@ -856,18 +890,31 @@
* <li>zero or more {@code Object} values (counted by {@code objectArgCount})
* <li>an {@code Object[]} array containing more arguments
* </ul>
- * The invoker will spread the varargs array, apply
- * reference casts as necessary, and unbox primitive arguments.
+ * <p>
+ * The invoker will behave like a call to {@link MethodHandle.invokeGeneric} with
+ * the indicated {@code type}.
+ * That is, if the target is exactly of the given {@code type}, it will behave
+ * like {@code invokeExact}; otherwise it behave as if {@link MethodHandle.asType}
+ * is used to convert the target to the required {@code type}.
+ * <p>
+ * The type of the returned invoker will not be the given {@code type}, but rather
+ * will have all parameter and return types replaced by {@code Object}, except for
+ * the last parameter type, which will be the array type {@code Object[]}.
+ * <p>
+ * Before invoking its target, the invoker will spread the varargs array, apply
+ * reference casts as necessary, and unbox and widen primitive arguments.
* The return value of the invoker will be an {@code Object} reference,
* boxing a primitive value if the original type returns a primitive,
* and always null if the original type returns void.
* <p>
* This method is equivalent to the following code (though it may be more efficient):
* <p><blockquote><pre>
- * MethodHandle invoker = exactInvoker(type);
- * MethodType vaType = MethodType.makeGeneric(objectArgCount, true);
+ * MethodHandle invoker = lookup().findVirtual(MethodHandle.class, "invokeGeneric", type);
+ * MethodType vaType = MethodType.genericMethodType(objectArgCount, true);
* vaType = vaType.insertParameterType(0, MethodHandle.class);
- * return spreadArguments(invoker, vaType);
+ * int spreadArgCount = type.parameterCount - objectArgCount;
+ * invoker = invoker.asSpreader(Object.class, spreadArgCount);
+ * return invoker.asType(vaType);
* </pre></blockquote>
* @param type the desired target type
* @param objectArgCount number of fixed (non-varargs) {@code Object} arguments
@@ -881,7 +928,6 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle which will take a invoke any method handle of the
* given type. The resulting invoker will have a type which is
* exactly equal to the desired type, except that it will accept
@@ -889,7 +935,7 @@
* <p>
* This method is equivalent to the following code (though it may be more efficient):
* <p><blockquote><pre>
- * lookup().findVirtual(MethodHandle.class, "invoke", type);
+ * lookup().findVirtual(MethodHandle.class, "invokeExact", type);
* </pre></blockquote>
* @param type the desired target type
* @return a method handle suitable for invoking any method handle of the given type
@@ -899,39 +945,6 @@
return invokers(type).exactInvoker();
}
- /**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
- * Produce a method handle equivalent to an invokedynamic instruction
- * which has been linked to the given call site.
- * Along with {@link Lookup#findVirtual}, {@link Lookup#findStatic},
- * and {@link Lookup#findSpecial}, this completes the emulation
- * of the JVM's {@code invoke} instructions.
- * <p>This method is equivalent to the following code:
- * <p><blockquote><pre>
- * MethodHandle getTarget, invoker, result;
- * getTarget = lookup().bind(site, "getTarget", methodType(MethodHandle.class));
- * invoker = exactInvoker(site.type());
- * result = foldArguments(invoker, getTarget)
- * </pre></blockquote>
- * @return a method handle which always invokes the call site's target
- */
- public static
- MethodHandle dynamicInvoker(CallSite site) throws NoAccessException {
- MethodHandle getCSTarget = GET_TARGET;
- if (getCSTarget == null) {
- try {
- GET_TARGET = getCSTarget = Lookup.IMPL_LOOKUP.
- findVirtual(CallSite.class, "getTarget", MethodType.methodType(MethodHandle.class));
- } catch (NoAccessException ex) {
- throw new InternalError();
- }
- }
- MethodHandle getTarget = MethodHandleImpl.bindReceiver(IMPL_TOKEN, getCSTarget, site);
- MethodHandle invoker = exactInvoker(site.type());
- return foldArguments(invoker, getTarget);
- }
- private static MethodHandle GET_TARGET = null; // link this lazily, not eagerly
-
static Invokers invokers(MethodType type) {
return MethodTypeImpl.invokers(IMPL_TOKEN, type);
}
@@ -974,23 +987,23 @@
if (t0.isPrimitive())
return Wrapper.asPrimitiveType(t1).cast(value);
else
- return Wrapper.OBJECT.cast(value, t1);
+ return Wrapper.OBJECT.convert(value, t1);
}
boolean prim0 = t0.isPrimitive(), prim1 = t1.isPrimitive();
if (!prim0) {
// check contract with caller
- Wrapper.OBJECT.cast(value, t0);
+ Wrapper.OBJECT.convert(value, t0);
if (!prim1) {
- return Wrapper.OBJECT.cast(value, t1);
+ return Wrapper.OBJECT.convert(value, t1);
}
// convert reference to primitive by unboxing
Wrapper w1 = Wrapper.forPrimitiveType(t1);
- return w1.cast(value, t1);
+ return w1.convert(value, t1);
}
// check contract with caller:
Wrapper.asWrapperType(t0).cast(value);
Wrapper w1 = Wrapper.forPrimitiveType(t1);
- return w1.cast(value, t1);
+ return w1.convert(value, t1);
}
static
@@ -1011,7 +1024,7 @@
* Produce a method handle which adapts the type of the
* given method handle to a new type by pairwise argument conversion.
* The original type and new type must have the same number of arguments.
- * The resulting method handle is guaranteed to confess a type
+ * The resulting method handle is guaranteed to report a type
* which is equal to the desired new type.
* <p>
* If the original type and new type are equal, returns target.
@@ -1023,34 +1036,21 @@
* Given those types T0, T1, one of the following conversions is applied
* if possible:
* <ul>
- * <li>If T0 and T1 are references, and T1 is not an interface type,
- * then a cast to T1 is applied.
+ * <li>If T0 and T1 are references, then a cast to T1 is applied.
* (The types do not need to be related in any particular way.)
- * <li>If T0 and T1 are references, and T1 is an interface type,
- * then the value of type T0 is passed as a T1 without a cast.
- * (This treatment of interfaces follows the usage of the bytecode verifier.)
- * <li>If T0 and T1 are primitives, then a Java casting
- * conversion (JLS 5.5) is applied, if one exists.
- * <li>If T0 and T1 are primitives and one is boolean,
- * the boolean is treated as a one-bit unsigned integer.
- * (This treatment follows the usage of the bytecode verifier.)
- * A conversion from another primitive type behaves as if
- * it first converts to byte, and then masks all but the low bit.
+ * <li>If T0 and T1 are primitives, then a Java method invocation
+ * conversion (JLS 5.3) is applied, if one exists.
* <li>If T0 is a primitive and T1 a reference, a boxing
* conversion is applied if one exists, possibly followed by
- * an reference conversion to a superclass.
+ * a reference conversion to a superclass.
* T1 must be a wrapper class or a supertype of one.
- * If T1 is a wrapper class, T0 is converted if necessary
- * to T1's primitive type by one of the preceding conversions.
- * Otherwise, T0 is boxed, and its wrapper converted to T1.
* <li>If T0 is a reference and T1 a primitive, an unboxing
- * conversion is applied if one exists, possibly preceded by
- * a reference conversion to a wrapper class.
+ * conversion will be applied at runtime, possibly followed
+ * by a Java method invocation conversion (JLS 5.3)
+ * on the primitive value. (These are the widening conversions.)
* T0 must be a wrapper class or a supertype of one.
- * If T0 is a wrapper class, its primitive value is converted
- * if necessary to T1 by one of the preceding conversions.
- * Otherwise, T0 is converted directly to the wrapper type for T1,
- * which is then unboxed.
+ * (In the case where T0 is Object, these are the conversions
+ * allowed by java.lang.reflect.Method.invoke.)
* <li>If the return type T1 is void, any returned value is discarded
* <li>If the return type T0 is void and T1 a reference, a null value is introduced.
* <li>If the return type T0 is void and T1 a primitive, a zero value is introduced.
@@ -1060,26 +1060,109 @@
* @return a method handle which delegates to {@code target} after performing
* any necessary argument conversions, and arranges for any
* necessary return value conversions
- * @throws IllegalArgumentException if the conversion cannot be made
+ * @throws WrongMethodTypeException if the conversion cannot be made
* @see MethodHandle#asType
+ * @see MethodHandles#explicitCastArguments
*/
public static
MethodHandle convertArguments(MethodHandle target, MethodType newType) {
MethodType oldType = target.type();
if (oldType.equals(newType))
return target;
- MethodHandle res = MethodHandleImpl.convertArguments(IMPL_TOKEN, target,
- newType, oldType, null);
+ MethodHandle res = null;
+ try {
+ res = MethodHandleImpl.convertArguments(IMPL_TOKEN, target,
+ newType, oldType, null);
+ } catch (IllegalArgumentException ex) {
+ }
if (res == null)
- throw newIllegalArgumentException("cannot convert to "+newType+": "+target);
+ throw new WrongMethodTypeException("cannot convert to "+newType+": "+target);
return res;
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
+ * Produce a method handle which adapts the type of the
+ * given method handle to a new type by pairwise argument conversion.
+ * The original type and new type must have the same number of arguments.
+ * The resulting method handle is guaranteed to report a type
+ * which is equal to the desired new type.
+ * <p>
+ * If the original type and new type are equal, returns target.
+ * <p>
+ * The same conversions are allowed as for {@link #convertArguments convertArguments},
+ * and some additional conversions are also applied if those conversions fail.
+ * Given types T0, T1, one of the following conversions is applied
+ * in addition, if the conversions specified for {@code convertArguments}
+ * would be insufficient:
+ * <ul>
+ * <li>If T0 and T1 are references, and T1 is an interface type,
+ * then the value of type T0 is passed as a T1 without a cast.
+ * (This treatment of interfaces follows the usage of the bytecode verifier.)
+ * <li>If T0 and T1 are primitives and one is boolean,
+ * the boolean is treated as a one-bit unsigned integer.
+ * (This treatment follows the usage of the bytecode verifier.)
+ * A conversion from another primitive type behaves as if
+ * it first converts to byte, and then masks all but the low bit.
+ * <li>If a primitive value would be converted by {@code convertArguments}
+ * using Java method invocation conversion (JLS 5.3),
+ * Java casting conversion (JLS 5.5) may be used also.
+ * This allows primitives to be narrowed as well as widened.
+ * </ul>
+ * @param target the method handle to invoke after arguments are retyped
+ * @param newType the expected type of the new method handle
+ * @return a method handle which delegates to {@code target} after performing
+ * any necessary argument conversions, and arranges for any
+ * necessary return value conversions
+ * @throws WrongMethodTypeException if the conversion cannot be made
+ * @see MethodHandle#asType
+ * @see MethodHandles#convertArguments
+ */
+ public static
+ MethodHandle explicitCastArguments(MethodHandle target, MethodType newType) {
+ return convertArguments(target, newType); // FIXME!
+ }
+
+ /*
+ FIXME: Reconcile javadoc with 10/22/2010 EG notes on conversion:
+
+ Both converters arrange for their method handles to convert arguments
+ and return values. The conversion rules are the same for arguments
+ and return values, and depend only on source and target types, S and
+ T. The conversions allowed by castConvertArguments are a strict
+ superset of those performed by convertArguments.
+
+ In all cases, if S and T are references, a simple checkcast is done.
+ If neither S nor T is a primitive, no attempt is made to unbox and
+ box. A failed conversion throws ClassCastException.
+
+ If T is void, the value is dropped.
+
+ For compatibility with reflection, if S is void and T is a reference,
+ a null value is produced.
+
+ For compatibility with reflection, if S is a reference and T is a
+ primitive, S is first unboxed and then undergoes primitive conversion.
+ In the case of 'convertArguments', only assignment conversion is
+ performed (no narrowing primitive conversion).
+
+ If S is a primitive, S is boxed, and then the above rules are applied.
+ If S and T are both primitives, the boxing will be undetectable; only
+ the primitive conversions will be apparent to the user. The key point
+ is that if S is a primitive type, the implementation may box it and
+ treat is as Object, without loss of information, or it may use a "fast
+ path" which does not use boxing.
+
+ Notwithstanding the rules above, for compatibility with the verifier,
+ if T is an interface, it is treated as if it were Object. [KEEP THIS?]
+
+ Also, for compatibility with the verifier, a boolean may be undergo
+ widening or narrowing conversion to any other primitive type. [KEEP THIS?]
+ */
+
+ /**
* Produce a method handle which adapts the calling sequence of the
* given method handle to a new type, by reordering the arguments.
- * The resulting method handle is guaranteed to confess a type
+ * The resulting method handle is guaranteed to report a type
* which is equal to the desired new type.
* <p>
* The given array controls the reordering.
@@ -1092,22 +1175,42 @@
* outgoing argument will be taken from the {@code I}-th incoming
* argument, where {@code I} is {@code reorder[N]}.
* <p>
+ * No argument or return value conversions are applied.
+ * The type of each incoming argument, as determined by {@code newType},
+ * must be identical to the type of the corresponding outgoing argument
+ * or arguments in the target method handle.
+ * The return type of {@code newType} must be identical to the return
+ * type of the original target.
+ * <p>
* The reordering array need not specify an actual permutation.
* An incoming argument will be duplicated if its index appears
* more than once in the array, and an incoming argument will be dropped
* if its index does not appear in the array.
- * <p>
- * Pairwise conversions are applied as needed to arguments and return
- * values, as with {@link #convertArguments}.
+ * As in the case of {@link #dropArguments(MethodHandle,int,List) dropArguments},
+ * incoming arguments which are not mentioned in the reordering array
+ * are may be any type, as determined only by {@code newType}.
+ * <blockquote><pre>
+MethodType intfn1 = MethodType.methodType(int.class, int.class);
+MethodType intfn2 = MethodType.methodType(int.class, int.class, int.class);
+MethodHandle sub = ... {int x, int y => x-y} ...;
+assert(sub.type().equals(intfn2));
+MethodHandle sub1 = MethodHandles.permuteArguments(sub, intfn2, 0, 1);
+MethodHandle rsub = MethodHandles.permuteArguments(sub, intfn2, 1, 0);
+assert((int)rsub.invokeExact(1, 100) == 99);
+MethodHandle add = ... {int x, int y => x+y} ...;
+assert(add.type().equals(intfn2));
+MethodHandle twice = MethodHandles.permuteArguments(add, intfn1, 0, 0);
+assert(twice.type().equals(intfn1));
+assert((int)twice.invokeExact(21) == 42);
+ * </pre></blockquote>
* @param target the method handle to invoke after arguments are reordered
* @param newType the expected type of the new method handle
* @param reorder a string which controls the reordering
- * @return a method handle which delegates to {@code target} after performing
- * any necessary argument motion and conversions, and arranges for any
- * necessary return value conversions
+ * @return a method handle which delegates to {@code target} after it
+ * drops unused arguments and moves and/or duplicates the other arguments
*/
public static
- MethodHandle permuteArguments(MethodHandle target, MethodType newType, int[] reorder) {
+ MethodHandle permuteArguments(MethodHandle target, MethodType newType, int... reorder) {
MethodType oldType = target.type();
checkReorder(reorder, newType, oldType);
return MethodHandleImpl.convertArguments(IMPL_TOKEN, target,
@@ -1130,33 +1233,21 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
- * Produce a method handle which adapts the type of the
- * given method handle to a new type, by spreading the final argument.
- * The resulting method handle is guaranteed to confess a type
- * which is equal to the desired new type.
- * <p>
- * The final parameter type of the new type must be an array type T[].
- * This is the type of what is called the <i>spread</i> argument.
- * All other arguments of the new type are called <i>ordinary</i> arguments.
- * <p>
- * The ordinary arguments of the new type are pairwise converted
- * to the initial parameter types of the old type, according to the
- * rules in {@link #convertArguments}.
- * Any additional arguments in the old type
- * are converted from the array element type T,
- * again according to the rules in {@link #convertArguments}.
- * The return value is converted according likewise.
- * <p>
- * The call verifies that the spread argument is in fact an array
- * of exactly the type length, i.e., the excess number of
- * arguments in the old type over the ordinary arguments in the new type.
- * If there are no excess arguments, the spread argument is also
- * allowed to be null.
- * @param target the method handle to invoke after the argument is prepended
+ * <em>METHOD WILL BE REMOVED FOR PFD:</em>
+ * Equivalent to the following code:
+ * <p><blockquote><pre>
+ * int spreadPos = newType.parameterCount() - 1;
+ * Class<?> spreadType = newType.parameterType(spreadPos);
+ * int spreadCount = target.type().parameterCount() - spreadPos;
+ * MethodHandle adapter = target.asSpreader(spreadType, spreadCount);
+ * adapter = adapter.asType(newType);
+ * return adapter;
+ * </pre></blockquote>
+ * @param target the method handle to invoke after argument spreading
* @param newType the expected type of the new method handle
- * @return a new method handle which spreads its final argument,
+ * @return a method handle which spreads its final argument,
* before calling the original method handle
+ * @deprecated Use {@link MethodHandle#asSpreader}
*/
public static
MethodHandle spreadArguments(MethodHandle target, MethodType newType) {
@@ -1176,21 +1267,22 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
- * Produce a method handle which adapts the type of the
- * given method handle to a new type, by collecting a series of
- * trailing arguments as elements to a single argument array.
- * <p>
- * This method may be used as an inverse to {@link #spreadArguments}.
- * The final parameter type of the old type must be an array type T[],
- * which is the type of what is called the <i>spread</i> argument.
- * The trailing arguments of the new type which correspond to
- * the spread argument are all converted to type T and collected
- * into an array before the original method is called.
- * @param target the method handle to invoke after the argument is prepended
+ * <em>METHOD WILL BE REMOVED FOR PFD:</em>
+ * Equivalent to the following code:
+ * <p><blockquote><pre>
+ * int collectPos = target.type().parameterCount() - 1;
+ * Class<?> collectType = target.type().parameterType(collectPos);
+ * if (!collectType.isArray()) collectType = Object[].class;
+ * int collectCount = newType.parameterCount() - collectPos;
+ * MethodHandle adapter = target.asCollector(collectType, collectCount);
+ * adapter = adapter.asType(newType);
+ * return adapter;
+ * </pre></blockquote>
+ * @param target the method handle to invoke after argument collection
* @param newType the expected type of the new method handle
- * @return a new method handle which collects some trailing argument
+ * @return a method handle which collects some trailing argument
* into an array, before calling the original method handle
+ * @deprecated Use {@link MethodHandle#asCollector} instead.
*/
public static
MethodHandle collectArguments(MethodHandle target, MethodType newType) {
@@ -1209,7 +1301,88 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
+ * Produce a method handle of the requested return type which returns the given
+ * constant value every time it is invoked.
+ * <p>
+ * Before the method handle is returned, the passed-in value is converted to the requested type.
+ * If the requested type is primitive, widening primitive conversions are attempted,
+ * else reference conversions are attempted.
+ * <p>The returned method handle is equivalent to {@code identity(type).bindTo(value)},
+ * unless the type is {@code void}, in which case it is {@code identity(type)}.
+ * @param type the return type of the desired method handle
+ * @param value the value to return
+ * @return a method handle of the given return type and no arguments, which always returns the given value
+ * @throws WrongMethodTypeException if the value cannot be converted to the required return type
+ */
+ public static
+ MethodHandle constant(Class<?> type, Object value) {
+ if (type.isPrimitive()) {
+ if (type == void.class) return identity(type);
+ Wrapper w = Wrapper.forPrimitiveType(type);
+ return identity(type).bindTo(w.convert(value, type));
+ } else {
+ return identity(type).bindTo(type.cast(value));
+ }
+ }
+
+ /**
+ * Produce a method handle of the requested type which returns the given
+ * constant value every time it is invoked.
+ * <p>
+ * Before the method handle is returned, the passed-in value is converted to the requested return type,
+ * as if by {@link #explicitCastArguments #explicitCastArguments}.
+ * That is, if the return type is primitive, the value is unboxed,
+ * and the primitive value is widened and/or narrowed.
+ * Otherwise, reference conversions are attempted.
+ * @param type the type of the desired method handle
+ * @param value the value to return
+ * @return a method handle of the given return type and no arguments, which always returns the given value
+ * @throws WrongMethodTypeException if the value cannot be converted to the required return type
+ */
+ public static
+ MethodHandle constant(MethodType type, Object value) {
+ MethodHandle target = constant(type.returnType(), value);
+ int len = type.parameterCount();
+ if (len == 0)
+ return target.asType(type);
+ target = target.asType(type.dropParameterTypes(0, len));
+ return dropArguments(target, 0, type.parameterList().subList(0, len));
+ }
+
+ /**
+ * Produce a method handle which returns its sole argument when invoked.
+ * <p>The identity function for {@code void} takes no arguments and returns no values.
+ * @param type the type of the sole parameter and return value of the desired method handle
+ * @return a unary method handle which accepts and returns the given type
+ */
+ public static
+ MethodHandle identity(Class<?> type) {
+ return ValueConversions.identity(type);
+ }
+
+ /**
+ * Produce a method handle of the requested type which returns its argument when invoked.
+ * If the return type differs from the first argument type, the argument will be
+ * converted as if by {@link #explicitCastArguments explicitCastArguments}.
+ * If there are additional arguments beyond the first, they are discarded.
+ * <p>The identity function for {@code void} discards all its arguments.
+ * @param type the type of the desired method handle
+ * @return a method handle of the given type, which always returns its first argument
+ * @throws WrongMethodTypeException if the first argument cannot be converted to the required return type
+ */
+ public static
+ MethodHandle identity(MethodType type) {
+ MethodHandle target = identity(type.returnType());
+ int len = type.parameterCount();
+ if (len == 1)
+ return explicitCastArguments(target, type);
+ if (len == 0)
+ throw new IllegalArgumentException("not enough arguments");
+ target = explicitCastArguments(target, type.dropParameterTypes(1, len));
+ return dropArguments(target, 1, type.parameterList().subList(1, len));
+ }
+
+ /**
* Produce a method handle which calls the original method handle {@code target},
* after inserting the given argument(s) at the given position.
* The formal parameters to {@code target} which will be supplied by those
@@ -1229,8 +1402,9 @@
* @param target the method handle to invoke after the argument is inserted
* @param pos where to insert the argument (zero for the first)
* @param values the series of arguments to insert
- * @return a new method handle which inserts an additional argument,
+ * @return a method handle which inserts an additional argument,
* before calling the original method handle
+ * @see MethodHandle#bindTo
*/
public static
MethodHandle insertArguments(MethodHandle target, int pos, Object... values) {
@@ -1263,14 +1437,7 @@
return result;
}
- @Deprecated // "use MethodHandles.insertArguments instead"
- public static
- MethodHandle insertArgument(MethodHandle target, int pos, Object value) {
- return insertArguments(target, pos, value);
- }
-
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Produce a method handle which calls the original method handle,
* after dropping the given argument(s) at the given position.
* The type of the new method handle will insert the given argument
@@ -1283,25 +1450,25 @@
* <p>
* <b>Example:</b>
* <p><blockquote><pre>
- * import static java.dyn.MethodHandles.*;
- * import static java.dyn.MethodType.*;
- * ...
- * MethodHandle cat = lookup().findVirtual(String.class,
- * "concat", methodType(String.class, String.class));
- * System.out.println((String) cat.invokeExact("x", "y")); // xy
- * MethodHandle d0 = dropArguments(cat, 0, String.class);
- * System.out.println((String) d0.invokeExact("x", "y", "z")); // yz
- * MethodHandle d1 = dropArguments(cat, 1, String.class);
- * System.out.println((String) d1.invokeExact("x", "y", "z")); // xz
- * MethodHandle d2 = dropArguments(cat, 2, String.class);
- * System.out.println((String) d2.invokeExact("x", "y", "z")); // xy
- * MethodHandle d12 = dropArguments(cat, 1, int.class, boolean.class);
- * System.out.println((String) d12.invokeExact("x", 12, true, "z")); // xz
+import static java.dyn.MethodHandles.*;
+import static java.dyn.MethodType.*;
+...
+MethodHandle cat = lookup().findVirtual(String.class,
+ "concat", methodType(String.class, String.class));
+assertEquals("xy", (String) cat.invokeExact("x", "y"));
+MethodHandle d0 = dropArguments(cat, 0, String.class);
+assertEquals("yz", (String) d0.invokeExact("x", "y", "z"));
+MethodHandle d1 = dropArguments(cat, 1, String.class);
+assertEquals("xz", (String) d1.invokeExact("x", "y", "z"));
+MethodHandle d2 = dropArguments(cat, 2, String.class);
+assertEquals("xy", (String) d2.invokeExact("x", "y", "z"));
+MethodHandle d12 = dropArguments(cat, 1, int.class, boolean.class);
+assertEquals("xz", (String) d12.invokeExact("x", 12, true, "z"));
* </pre></blockquote>
- * @param target the method handle to invoke after the argument is dropped
- * @param valueTypes the type(s) of the argument to drop
- * @param pos which argument to drop (zero for the first)
- * @return a new method handle which drops an argument of the given type,
+ * @param target the method handle to invoke after the arguments are dropped
+ * @param valueTypes the type(s) of the argument(s) to drop
+ * @param pos position of first argument to drop (zero for the leftmost)
+ * @return a method handle which drops arguments of the given types,
* before calling the original method handle
*/
public static
@@ -1319,23 +1486,36 @@
return MethodHandleImpl.dropArguments(IMPL_TOKEN, target, newType, pos);
}
+ /**
+ * Produce a method handle which calls the original method handle,
+ * after dropping the given argument(s) at the given position.
+ * The type of the new method handle will insert the given argument
+ * type(s), at that position, into the original handle's type.
+ * This method is equivalent to the following code:
+ * <code>
+ * {@link #dropArguments(MethodHandle,int,List) dropArguments}(target, pos, Arrays.asList(valueTypes))
+ * </code>
+ * @param target the method handle to invoke after the arguments are dropped
+ * @param valueTypes the type(s) of the argument(s) to drop
+ * @param pos position of first argument to drop (zero for the leftmost)
+ * @return a method handle which drops arguments of the given types,
+ * before calling the original method handle
+ */
public static
MethodHandle dropArguments(MethodHandle target, int pos, Class<?>... valueTypes) {
return dropArguments(target, pos, Arrays.asList(valueTypes));
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Adapt a target method handle {@code target} by pre-processing
* one or more of its arguments, each with its own unary filter function,
* and then calling the target with each pre-processed argument
* replaced by the result of its corresponding filter function.
* <p>
* The pre-processing is performed by one or more method handles,
- * specified in the non-null elements of the {@code filters} array.
- * (If there are no such elements, the original target is returned.)
- * Each filter (that is, each non-null element of {@code filters})
- * is applied to the corresponding argument of the adapter.
+ * specified in the elements of the {@code filters} array.
+ * (If there are no elements in the array, the original target is returned.)
+ * Each filter is applied to the corresponding argument of the adapter.
* <p>
* If a filter {@code F} applies to the {@code N}th argument of
* the method handle, then {@code F} must be a method handle which
@@ -1345,46 +1525,49 @@
* The return type of {@code F} must be identical to the corresponding
* parameter type of the target.
* <p>
- * It is an error if there are non-null elements of {@code filters}
+ * It is an error if there are elements of {@code filters}
* which do not correspond to argument positions in the target.
- * The actual length of the target array may be any number, it need
- * not be the same as the parameter count of the target type.
- * (This provides an easy way to filter just the first argument or two
- * of a target method handle.)
- * <p> Here is pseudocode for the resulting adapter:
- * <blockquote><pre>
- * // there are N arguments in the A sequence
- * T target(A[N]...);
- * [i<N] V[i] filter[i](B[i]) = filters[i] ?: identity;
- * T adapter(B[N]... b) {
- * A[N] a...;
- * [i<N] a[i] = filter[i](b[i]);
- * return target(a...);
- * }
+ * <b>Example:</b>
+ * <p><blockquote><pre>
+import static java.dyn.MethodHandles.*;
+import static java.dyn.MethodType.*;
+...
+MethodHandle cat = lookup().findVirtual(String.class,
+ "concat", methodType(String.class, String.class));
+MethodHandle upcase = lookup().findVirtual(String.class,
+ "toUpperCase", methodType(String.class));
+assertEquals("xy", (String) cat.invokeExact("x", "y"));
+MethodHandle f0 = filterArguments(cat, 0, upcase);
+assertEquals("Xy", (String) f0.invokeExact("x", "y")); // Xy
+MethodHandle f1 = filterArguments(cat, 1, upcase);
+assertEquals("xY", (String) f1.invokeExact("x", "y")); // xY
+MethodHandle f2 = filterArguments(cat, 0, upcase, upcase);
+assertEquals("XY", (String) f2.invokeExact("x", "y")); // XY
* </pre></blockquote>
* @param target the method handle to invoke after arguments are filtered
+ * @param pos the position of the first argument to filter
* @param filters method handles to call initially on filtered arguments
* @return method handle which incorporates the specified argument filtering logic
- * @throws IllegalArgumentException if a non-null element of {@code filters}
- * does not match a corresponding argument type of {@code target}
+ * @throws IllegalArgumentException if an element of {@code filters} is null or
+ * does not match a corresponding argument type of {@code target} as described above
*/
public static
- MethodHandle filterArguments(MethodHandle target, MethodHandle... filters) {
+ MethodHandle filterArguments(MethodHandle target, int pos, MethodHandle... filters) {
MethodType targetType = target.type();
MethodHandle adapter = target;
MethodType adapterType = targetType;
- int pos = -1, maxPos = targetType.parameterCount();
+ int maxPos = targetType.parameterCount();
+ int curPos = pos;
for (MethodHandle filter : filters) {
- pos += 1;
- if (filter == null) continue;
- if (pos >= maxPos)
+ if (curPos >= maxPos)
throw newIllegalArgumentException("too many filters");
MethodType filterType = filter.type();
if (filterType.parameterCount() != 1
- || filterType.returnType() != targetType.parameterType(pos))
+ || filterType.returnType() != targetType.parameterType(curPos))
throw newIllegalArgumentException("target and filter types do not match");
- adapterType = adapterType.changeParameterType(pos, filterType.parameterType(0));
- adapter = MethodHandleImpl.filterArgument(IMPL_TOKEN, adapter, pos, filter);
+ adapterType = adapterType.changeParameterType(curPos, filterType.parameterType(0));
+ adapter = MethodHandleImpl.filterArgument(IMPL_TOKEN, adapter, curPos, filter);
+ curPos += 1;
}
MethodType midType = adapter.type();
if (midType != adapterType)
@@ -1393,7 +1576,48 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
+ * Adapt a target method handle {@code target} by post-processing
+ * its return value with a unary filter function.
+ * <p>
+ * If a filter {@code F} applies to the return value of
+ * the target method handle, then {@code F} must be a method handle which
+ * takes exactly one argument. The return type of {@code F}
+ * replaces the return type of the target
+ * in the resulting adapted method handle.
+ * The argument type of {@code F} must be identical to the
+ * return type of the target.
+ * <b>Example:</b>
+ * <p><blockquote><pre>
+import static java.dyn.MethodHandles.*;
+import static java.dyn.MethodType.*;
+...
+MethodHandle cat = lookup().findVirtual(String.class,
+ "concat", methodType(String.class, String.class));
+MethodHandle length = lookup().findVirtual(String.class,
+ "length", methodType(int.class));
+System.out.println((String) cat.invokeExact("x", "y")); // xy
+MethodHandle f0 = filterReturnValue(cat, length);
+System.out.println((int) f0.invokeExact("x", "y")); // 2
+ * </pre></blockquote>
+ * @param target the method handle to invoke before filtering the return value
+ * @param filter method handle to call on the return value
+ * @return method handle which incorporates the specified return value filtering logic
+ * @throws IllegalArgumentException if {@code filter} is null or
+ * does not match the return type of {@code target} as described above
+ */
+ public static
+ MethodHandle filterReturnValue(MethodHandle target, MethodHandle filter) {
+ MethodType targetType = target.type();
+ MethodType filterType = filter.type();
+ if (filterType.parameterCount() != 1
+ || filterType.parameterType(0) != targetType.returnType())
+ throw newIllegalArgumentException("target and filter types do not match");
+ // FIXME: Too many nodes here.
+ MethodHandle returner = dropArguments(filter, 0, targetType.parameterList());
+ return foldArguments(returner, exactInvoker(target.type()).bindTo(target));
+ }
+
+ /**
* Adapt a target method handle {@code target} by pre-processing
* some of its arguments, and then calling the target with
* the result of the pre-processing, plus all original arguments.
@@ -1410,10 +1634,10 @@
* The resulting adapter is the same type as the target, except that the
* initial argument type of the target is dropped.
* <p>
- * (Note that {@link #dropArguments} can be used to remove any arguments
+ * (Note that {@link #dropArguments(MethodHandle,int,List) dropArguments} can be used to remove any arguments
* that either the {@code combiner} or {@code target} does not wish to receive.
* If some of the incoming arguments are destined only for the combiner,
- * consider using {@link #collectArguments} instead, since those
+ * consider using {@link MethodHandle#asCollector} instead, since those
* arguments will not need to be live on the stack on entry to the
* target.)
* <p>
@@ -1434,7 +1658,7 @@
* @return method handle which incorporates the specified argument folding logic
* @throws IllegalArgumentException if the first argument type of
* {@code target} is not the same as {@code combiner}'s return type,
- * or if the next {@code foldArgs} argument types of {@code target}
+ * or if the following argument types of {@code target}
* are not identical with the argument types of {@code combiner}
*/
public static
@@ -1443,6 +1667,10 @@
MethodType combinerType = combiner.type();
int foldArgs = combinerType.parameterCount();
boolean ok = (targetType.parameterCount() >= 1 + foldArgs);
+ if (ok && !combinerType.parameterList().equals(targetType.parameterList().subList(1, foldArgs+1)))
+ ok = false;
+ if (ok && !combinerType.returnType().equals(targetType.parameterType(0)))
+ ok = false;
if (!ok)
throw misMatchedTypes("target and combiner types", targetType, combinerType);
MethodType newType = targetType.dropParameterTypes(0, 1);
@@ -1450,7 +1678,6 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Make a method handle which adapts a target method handle,
* by guarding it with a test, a boolean-valued method handle.
* If the guard fails, a fallback handle is called instead.
@@ -1470,6 +1697,9 @@
* return fallback(a..., b...);
* }
* </pre></blockquote>
+ * Note that the test arguments ({@code a...} in the pseudocode) cannot
+ * be modified by execution of the test, and so are passed unchanged
+ * from the caller to the target or fallback as appropriate.
* @param test method handle used for test, must return boolean
* @param target method handle to call if test passes
* @param fallback method handle to call if test fails
@@ -1485,40 +1715,19 @@
MethodType gtype = test.type();
MethodType ttype = target.type();
MethodType ftype = fallback.type();
- if (ttype != ftype)
+ if (!ttype.equals(ftype))
throw misMatchedTypes("target and fallback types", ttype, ftype);
- MethodType gtype2 = ttype.changeReturnType(boolean.class);
- if (gtype2 != gtype) {
- if (gtype.returnType() != boolean.class)
- throw newIllegalArgumentException("guard type is not a predicate "+gtype);
- int gpc = gtype.parameterCount(), tpc = ttype.parameterCount();
- if (gpc < tpc) {
- test = dropArguments(test, gpc, ttype.parameterList().subList(gpc, tpc));
- gtype = test.type();
- }
- if (gtype2 != gtype)
+ if (gtype.returnType() != boolean.class)
+ throw newIllegalArgumentException("guard type is not a predicate "+gtype);
+ List<Class<?>> targs = ttype.parameterList();
+ List<Class<?>> gargs = gtype.parameterList();
+ if (!targs.equals(gargs)) {
+ int gpc = gargs.size(), tpc = targs.size();
+ if (gpc >= tpc || !targs.subList(0, gpc).equals(gargs))
throw misMatchedTypes("target and test types", ttype, gtype);
+ test = dropArguments(test, gpc, targs.subList(gpc, tpc));
+ gtype = test.type();
}
- /* {
- MethodHandle invoke = findVirtual(MethodHandle.class, "invoke", target.type());
- static MethodHandle choose(boolean z, MethodHandle t, MethodHandle f) {
- return z ? t : f;
- }
- static MethodHandle compose(MethodHandle f, MethodHandle g) {
- Class<?> initargs = g.type().parameterArray();
- f = dropArguments(f, 1, initargs); // ignore 2nd copy of args
- return combineArguments(f, g);
- }
- // choose = \z.(z ? target : fallback)
- MethodHandle choose = findVirtual(MethodHandles.class, "choose",
- MethodType.methodType(boolean.class, MethodHandle.class, MethodHandle.class));
- choose = appendArgument(choose, target);
- choose = appendArgument(choose, fallback);
- MethodHandle dispatch = compose(choose, test);
- // dispatch = \(a...).(test(a...) ? target : fallback)
- return combineArguments(invoke, dispatch, 0);
- // return \(a...).((test(a...) ? target : fallback).invokeExact(a...))
- } */
return MethodHandleImpl.makeGuardWithTest(IMPL_TOKEN, test, target, fallback);
}
@@ -1527,29 +1736,38 @@
}
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* Make a method handle which adapts a target method handle,
* by running it inside an exception handler.
* If the target returns normally, the adapter returns that value.
* If an exception matching the specified type is thrown, the fallback
* handle is called instead on the exception, plus the original arguments.
* <p>
- * The handler must have leading parameter of {@code exType} or a supertype,
- * followed by arguments which correspond <em>(how? TBD)</em> to
- * all the parameters of the target.
- * The target and handler must return the same type.
+ * The target and handler must have the same corresponding
+ * argument and return types, except that handler may omit trailing arguments
+ * (similarly to the predicate in {@link #guardWithTest guardWithTest}).
+ * Also, the handler must have an extra leading parameter of {@code exType} or a supertype.
* <p> Here is pseudocode for the resulting adapter:
* <blockquote><pre>
- * T target(A...);
+ * T target(A..., B...);
* T handler(ExType, A...);
- * T adapter(A... a) {
+ * T adapter(A... a, B... b) {
* try {
- * return target(a...);
+ * return target(a..., b...);
* } catch (ExType ex) {
* return handler(ex, a...);
* }
* }
* </pre></blockquote>
+ * Note that the saved arguments ({@code a...} in the pseudocode) cannot
+ * be modified by execution of the target, and so are passed unchanged
+ * from the caller to the handler, if the handler is invoked.
+ * <p>
+ * The target and handler must return the same type, even if the handler
+ * always throws. (This might happen, for instance, because the handler
+ * is simulating a {@code finally} clause).
+ * To create such a throwing handler, compose the handler creation logic
+ * with {@link #throwException throwException},
+ * in order to create a method handle of the correct return type.
* @param target method handle to call
* @param exType the type of exception which the handler will catch
* @param handler method handle to call if a matching exception is thrown
@@ -1563,16 +1781,23 @@
MethodHandle catchException(MethodHandle target,
Class<? extends Throwable> exType,
MethodHandle handler) {
- MethodType targetType = target.type();
- MethodType handlerType = handler.type();
- boolean ok = (targetType.parameterCount() ==
- handlerType.parameterCount() - 1);
-// for (int i = 0; ok && i < numExArgs; i++) {
-// if (targetType.parameterType(i) != handlerType.parameterType(1+i))
-// ok = false;
-// }
- if (!ok)
- throw newIllegalArgumentException("target and handler types do not match");
+ MethodType ttype = target.type();
+ MethodType htype = handler.type();
+ if (htype.parameterCount() < 1 ||
+ !htype.parameterType(0).isAssignableFrom(exType))
+ throw newIllegalArgumentException("handler does not accept exception type "+exType);
+ if (htype.returnType() != ttype.returnType())
+ throw misMatchedTypes("target and handler return types", ttype, htype);
+ List<Class<?>> targs = ttype.parameterList();
+ List<Class<?>> hargs = htype.parameterList();
+ hargs = hargs.subList(1, hargs.size()); // omit leading parameter from handler
+ if (!targs.equals(hargs)) {
+ int hpc = hargs.size(), tpc = targs.size();
+ if (hpc >= tpc || !targs.subList(0, hpc).equals(hargs))
+ throw misMatchedTypes("target and handler types", ttype, htype);
+ handler = dropArguments(handler, hpc, hargs.subList(hpc, tpc));
+ htype = handler.type();
+ }
return MethodHandleImpl.makeGuardWithCatch(IMPL_TOKEN, target, exType, handler);
}
@@ -1590,10 +1815,11 @@
}
/**
- * Produce a wrapper instance of the given "SAM" type which redirects its calls to the given method handle.
- * A SAM type is a type which declares a single abstract method.
- * Additionally, it must have either no constructor (as an interface)
- * or have a public or protected constructor of zero arguments (as a class).
+ * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
+ * Produce a wrapper instance of the given "SAM" interface which redirects
+ * its calls to the given method handle.
+ * A SAM interface is an interface which declares a single abstract method.
+ * The type must be public. (No additional access checks are performed.)
* <p>
* The resulting instance of the required SAM type will respond to
* invocation of the SAM type's single abstract method by calling
@@ -1605,9 +1831,9 @@
* The method handle may throw an <em>undeclared exception</em>,
* which means any checked exception (or other checked throwable)
* not declared by the SAM type's single abstract method.
- * If this happens, the throwable will be wrapped in an instance
- * of {@link UndeclaredThrowableException} and thrown in that
- * wrapped form.
+ * If this happens, the throwable will be wrapped in an instance of
+ * {@link java.lang.reflect.UndeclaredThrowableException UndeclaredThrowableException}
+ * and thrown in that wrapped form.
* <p>
* The wrapper instance is guaranteed to be of a non-public
* implementation class C in a package containing no classes
@@ -1618,19 +1844,36 @@
* <li>the SAM type itself and any methods in the SAM type
* <li>the supertypes of the SAM type (if any) and their methods
* <li>{@link Object} and its methods
- * <li>{@link MethodHandleProvider} and its methods
+ * <li>{@link java.dyn.AsInstanceObject AsInstanceObject} and its methods</li>
* </ul>
* <p>
+ * (Note: When determining the unique abstract method of a SAM interface,
+ * the public {@code Object} methods ({@code toString}, {@code equals}, {@code hashCode})
+ * are disregarded. For example, {@link java.util.Comparator} is a SAM interface,
+ * even though it re-declares the {@code Object.equals} method.)
+ * <p>
* No stable mapping is promised between the SAM type and
* the implementation class C. Over time, several implementation
* classes might be used for the same SAM type.
* <p>
* This method is not guaranteed to return a distinct
- * wrapper object for each separate call. If the JVM is able
- * to prove that a wrapper has already been created for a given
+ * wrapper object for each separate call. If the implementation is able
+ * to prove that a wrapper of the required SAM type
+ * has already been created for a given
* method handle, or for another method handle with the
- * same behavior, the JVM may return that wrapper in place of
+ * same behavior, the implementation may return that wrapper in place of
* a new wrapper.
+ * <p>
+ * This method is designed to apply to common use cases
+ * where a single method handle must interoperate with
+ * a type (class or interface) that implements a function-like
+ * API. Additional variations, such as SAM classes with
+ * private constructors, or interfaces with multiple but related
+ * entry points, must be covered by hand-written or automatically
+ * generated adapter classes. In those cases, consider implementing
+ * {@link java.dyn.MethodHandles.AsInstanceObject AsInstanceObject}
+ * in the adapters, so that generic code can extract the underlying
+ * method handle without knowing where the SAM adapter came from.
* @param target the method handle to invoke from the wrapper
* @param samType the desired type of the wrapper, a SAM type
* @return a correctly-typed wrapper for the given {@code target}
@@ -1639,38 +1882,93 @@
*/
// ISSUE: Should we delegate equals/hashCode to the targets?
// Not useful unless there is a stable equals/hashCode behavior
- // for MethodHandle, and for MethodHandleProvider.asMethodHandle.
+ // for MethodHandle, but there isn't.
public static
- <T> T asInstance(MethodHandle target, Class<T> samType) {
+ <T> T asInstance(final MethodHandle target, final Class<T> samType) {
// POC implementation only; violates the above contract several ways
final Method sam = getSamMethod(samType);
if (sam == null)
throw new IllegalArgumentException("not a SAM type: "+samType.getName());
MethodType samMT = MethodType.methodType(sam.getReturnType(), sam.getParameterTypes());
if (!samMT.equals(target.type()))
- throw new IllegalArgumentException("wrong method type");
- final MethodHandle mh = target;
+ throw new IllegalArgumentException("wrong method type: "+target+" should match "+sam);
return samType.cast(Proxy.newProxyInstance(
samType.getClassLoader(),
- new Class[]{ samType, MethodHandleProvider.class },
+ new Class[]{ samType, AsInstanceObject.class },
new InvocationHandler() {
+ private Object getArg(String name) {
+ if ((Object)name == "getAsInstanceTarget") return target;
+ if ((Object)name == "getAsInstanceType") return samType;
+ throw new AssertionError();
+ }
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
- if (method.getDeclaringClass() == MethodHandleProvider.class) {
- return method.invoke(mh, args);
- }
- assert method.equals(sam) : method;
- return mh.invokeVarargs(args);
+ if (method.getDeclaringClass() == AsInstanceObject.class)
+ return getArg(method.getName());
+ if (method.equals(sam))
+ return target.invokeVarargs(args);
+ if (isObjectMethod(method))
+ return callObjectMethod(this, method, args);
+ throw new InternalError();
}
}));
}
+ /**
+ * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
+ * Interface implemented by every object which is produced by {@link #asInstance asInstance}.
+ * The methods of this interface allow a caller to recover the parameters
+ * to {@code asInstance}.
+ * This allows applications to repeatedly convert between method handles
+ * and SAM objects, without the risk of creating unbounded delegation chains.
+ */
+ public interface AsInstanceObject {
+ /** Produce or recover a target method handle which is behaviorally
+ * equivalent to the SAM method of this object.
+ */
+ public MethodHandle getAsInstanceTarget();
+ /** Recover the SAM type for which this object was created.
+ */
+ public Class<?> getAsInstanceType();
+ }
+
+ private static
+ boolean isObjectMethod(Method m) {
+ switch (m.getName()) {
+ case "toString":
+ return (m.getReturnType() == String.class
+ && m.getParameterTypes().length == 0);
+ case "hashCode":
+ return (m.getReturnType() == int.class
+ && m.getParameterTypes().length == 0);
+ case "equals":
+ return (m.getReturnType() == boolean.class
+ && m.getParameterTypes().length == 1
+ && m.getParameterTypes()[0] == Object.class);
+ }
+ return false;
+ }
+
+ private static
+ Object callObjectMethod(Object self, Method m, Object[] args) {
+ assert(isObjectMethod(m)) : m;
+ switch (m.getName()) {
+ case "toString":
+ return self.getClass().getName() + "@" + Integer.toHexString(self.hashCode());
+ case "hashCode":
+ return System.identityHashCode(self);
+ case "equals":
+ return (self == args[0]);
+ }
+ return null;
+ }
+
private static
Method getSamMethod(Class<?> samType) {
Method sam = null;
for (Method m : samType.getMethods()) {
int mod = m.getModifiers();
if (Modifier.isAbstract(mod)) {
- if (sam != null)
+ if (sam != null && !isObjectMethod(sam))
return null; // too many abstract methods
sam = m;
}
@@ -1691,4 +1989,9 @@
}
return null;
}
+
+ /*non-public*/
+ static MethodHandle withTypeHandler(MethodHandle target, MethodHandle typeHandler) {
+ return MethodHandleImpl.withTypeHandler(IMPL_TOKEN, target, typeHandler);
+ }
}
--- a/jdk/src/share/classes/java/dyn/MethodType.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/java/dyn/MethodType.java Tue Dec 21 18:45:45 2010 -0800
@@ -56,21 +56,33 @@
* <p>
* This type can be created only by factory methods.
* All factory methods may cache values, though caching is not guaranteed.
+ * Some factory methods are static, while others are virtual methods which
+ * modify precursor method types, e.g., by changing a selected parameter.
+ * <p>
+ * Factory methods which operate on groups of parameter types
+ * are systematically presented in two versions, so that both Java arrays and
+ * Java lists can be used to work with groups of parameter types.
+ * The query methods {@code parameterArray} and {@code parameterList}
+ * also provide a choice between arrays and lists.
* <p>
* {@code MethodType} objects are sometimes derived from bytecode instructions
* such as {@code invokedynamic}, specifically from the type descriptor strings associated
* with the instructions in a class file's constant pool.
- * When this occurs, any classes named in the descriptor strings must be loaded.
- * (But they need not be initialized.)
- * This loading may occur at any time before the {@code MethodType} object is first derived.
* <p>
- * Like classes and strings, method types can be represented directly
- * in a class file's constant pool as constants to be loaded by {@code ldc} bytecodes.
- * Loading such a constant causes its component classes to be loaded as necessary.
+ * Like classes and strings, method types can also be represented directly
+ * in a class file's constant pool as constants. The may be loaded by an {@code ldc}
+ * instruction which refers to a suitable {@code CONSTANT_MethodType} constant pool entry.
+ * The entry refers to a {@code CONSTANT_Utf8} spelling for the descriptor string.
+ * For more details, see the <a href="package-summary.html#mtcon">package summary</a>.
+ * <p>
+ * When the JVM materializes a {@code MethodType} from a descriptor string,
+ * all classes named in the descriptor must be accessible, and will be loaded.
+ * (But the classes need not be initialized, as is the case with a {@code CONSTANT_Class}.)
+ * This loading may occur at any time before the {@code MethodType} object is first derived.
* @author John Rose, JSR 292 EG
*/
public final
-class MethodType implements java.lang.reflect.Type {
+class MethodType {
private final Class<?> rtype;
private final Class<?>[] ptypes;
private MethodTypeForm form; // erased form, plus cached data about primitives
@@ -119,7 +131,7 @@
for (Class<?> ptype : ptypes) {
ptype.equals(ptype); // null check
if (ptype == void.class)
- throw newIllegalArgumentException("void parameter: "+this);
+ throw newIllegalArgumentException("parameter type cannot be void");
}
}
@@ -139,10 +151,6 @@
MethodType methodType(Class<?> rtype, Class<?>[] ptypes) {
return makeImpl(rtype, ptypes, false);
}
- @Deprecated public static
- MethodType make(Class<?> rtype, Class<?>[] ptypes) {
- return methodType(rtype, ptypes);
- }
/** Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[])}. */
public static
@@ -150,10 +158,6 @@
boolean notrust = false; // random List impl. could return evil ptypes array
return makeImpl(rtype, ptypes.toArray(NO_PTYPES), notrust);
}
- @Deprecated public static
- MethodType make(Class<?> rtype, List<? extends Class<?>> ptypes) {
- return methodType(rtype, ptypes);
- }
/** Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[])}.
* The leading parameter type is prepended to the remaining array.
@@ -165,10 +169,6 @@
System.arraycopy(ptypes, 0, ptypes1, 1, ptypes.length);
return makeImpl(rtype, ptypes1, true);
}
- @Deprecated public static
- MethodType make(Class<?> rtype, Class<?> ptype0, Class<?>... ptypes) {
- return methodType(rtype, ptype0, ptypes);
- }
/** Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[])}.
* The resulting method has no parameter types.
@@ -177,10 +177,6 @@
MethodType methodType(Class<?> rtype) {
return makeImpl(rtype, NO_PTYPES, true);
}
- @Deprecated public static
- MethodType make(Class<?> rtype) {
- return methodType(rtype);
- }
/** Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[])}.
* The resulting method has the single given parameter type.
@@ -189,10 +185,6 @@
MethodType methodType(Class<?> rtype, Class<?> ptype0) {
return makeImpl(rtype, new Class<?>[]{ ptype0 }, true);
}
- @Deprecated public static
- MethodType make(Class<?> rtype, Class<?> ptype0) {
- return methodType(rtype, ptype0);
- }
/** Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[])}.
* The resulting method has the same parameter types as {@code ptypes},
@@ -202,10 +194,6 @@
MethodType methodType(Class<?> rtype, MethodType ptypes) {
return makeImpl(rtype, ptypes.ptypes, true);
}
- @Deprecated public static
- MethodType make(Class<?> rtype, MethodType ptypes) {
- return methodType(rtype, ptypes);
- }
/**
* Sole factory method to find or create an interned method type.
@@ -275,10 +263,6 @@
}
return mt;
}
- @Deprecated public static
- MethodType makeGeneric(int objectArgCount, boolean varargs) {
- return genericMethodType(objectArgCount, varargs);
- }
/**
* All parameters and the return type will be Object.
@@ -290,10 +274,6 @@
MethodType genericMethodType(int objectArgCount) {
return genericMethodType(objectArgCount, false);
}
- @Deprecated public static
- MethodType makeGeneric(int objectArgCount) {
- return genericMethodType(objectArgCount);
- }
/** Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[])}.
* @param num the index (zero-based) of the parameter type to change
@@ -307,18 +287,6 @@
return makeImpl(rtype, nptypes, true);
}
- /** Convenience method for {@link #insertParameterTypes}.
- * @deprecated Use {@link #insertParameterTypes} instead.
- */
- @Deprecated
- public MethodType insertParameterType(int num, Class<?> nptype) {
- int len = ptypes.length;
- Class<?>[] nptypes = Arrays.copyOfRange(ptypes, 0, len+1);
- System.arraycopy(nptypes, num, nptypes, num+1, len-num);
- nptypes[num] = nptype;
- return makeImpl(rtype, nptypes, true);
- }
-
/** Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[])}.
* @param num the position (zero-based) of the inserted parameter type(s)
* @param ptypesToInsert zero or more a new parameter types to insert into the parameter list
@@ -337,6 +305,22 @@
}
/** Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[])}.
+ * @param ptypesToInsert zero or more a new parameter types to insert after the end of the parameter list
+ * @return the same type, except with the selected parameter(s) appended
+ */
+ public MethodType appendParameterTypes(Class<?>... ptypesToInsert) {
+ return insertParameterTypes(parameterCount(), ptypesToInsert);
+ }
+
+ /** Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[])}.
+ * @param ptypesToInsert zero or more a new parameter types to insert after the end of the parameter list
+ * @return the same type, except with the selected parameter(s) appended
+ */
+ public MethodType appendParameterTypes(List<Class<?>> ptypesToInsert) {
+ return insertParameterTypes(parameterCount(), ptypesToInsert);
+ }
+
+ /** Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[])}.
* @param num the position (zero-based) of the inserted parameter type(s)
* @param ptypesToInsert zero or more a new parameter types to insert into the parameter list
* @return the same type, except with the selected parameter(s) inserted
@@ -377,14 +361,6 @@
return makeImpl(rtype, nptypes, true);
}
- /** Convenience method for {@link #dropParameterTypes}.
- * @deprecated Use {@link #dropParameterTypes} instead.
- */
- @Deprecated
- public MethodType dropParameterType(int num) {
- return dropParameterTypes(num, num+1);
- }
-
/** Convenience method for {@link #methodType(java.lang.Class, java.lang.Class[])}.
* @param nrtype a return parameter type to replace the old one with
* @return the same type, except with the return type change
@@ -552,7 +528,9 @@
* parenthesis enclosed, comma separated list of type names,
* followed immediately by the return type.
* <p>
- * If a type name is array, it the base type followed
+ * Each type is represented by its
+ * {@link java.lang.Class#getSimpleName simple name}.
+ * If a type name name is array, it the base type followed
* by [], rather than the Class.getName of the array type.
*/
@Override
@@ -561,35 +539,13 @@
sb.append("(");
for (int i = 0; i < ptypes.length; i++) {
if (i > 0) sb.append(",");
- putName(sb, ptypes[i]);
+ sb.append(ptypes[i].getSimpleName());
}
sb.append(")");
- putName(sb, rtype);
+ sb.append(rtype.getSimpleName());
return sb.toString();
}
- static void putName(StringBuilder sb, Class<?> cls) {
- int brackets = 0;
- while (cls.isArray()) {
- cls = cls.getComponentType();
- brackets++;
- }
- String n = cls.getName();
- /*
- if (n.startsWith("java.lang.")) {
- String nb = n.substring("java.lang.".length());
- if (nb.indexOf('.') < 0) n = nb;
- } else if (n.indexOf('.') < 0) {
- n = "."+n; // anonymous package
- }
- */
- sb.append(n);
- while (brackets > 0) {
- sb.append("[]");
- brackets--;
- }
- }
-
/// Queries which have to do with the bytecode architecture
/** The number of JVM stack slots required to invoke a method
@@ -690,14 +646,4 @@
public String toMethodDescriptorString() {
return BytecodeDescriptor.unparse(this);
}
-
- /** Temporary alias for toMethodDescriptorString; delete after M3. */
- public String toBytecodeString() {
- return toMethodDescriptorString();
- }
- /** Temporary alias for fromMethodDescriptorString; delete after M3. */
- public static MethodType fromBytecodeString(String descriptor, ClassLoader loader)
- throws IllegalArgumentException, TypeNotPresentException {
- return fromMethodDescriptorString(descriptor, loader);
- }
}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/dyn/MutableCallSite.java Tue Dec 21 18:45:45 2010 -0800
@@ -0,0 +1,206 @@
+/*
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.dyn;
+
+import sun.dyn.*;
+import sun.dyn.empty.Empty;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/**
+ * A {@code MutableCallSite} is a {@link CallSite} whose target variable
+ * behaves like an ordinary field.
+ * An {@code invokedynamic} instruction linked to a {@code MutableCallSite} delegates
+ * all calls to the site's current target.
+ * The {@linkplain CallSite#dynamicInvoker dynamic invoker} of a mutable call site
+ * also delegates each call to the site's current target.
+ * <p>
+ * Here is an example of a mutable call site which introduces a
+ * state variable into a method handle chain.
+ * <blockquote><pre>
+MutableCallSite name = new MutableCallSite(MethodType.methodType(String.class));
+MethodHandle MH_name = name.dynamicInvoker();
+MethodType MT_str2 = MethodType.methodType(String.class, String.class);
+MethodHandle MH_upcase = MethodHandles.lookup()
+ .findVirtual(String.class, "toUpperCase", MT_str2);
+MethodHandle worker1 = MethodHandles.filterReturnValue(MH_name, MH_upcase);
+name.setTarget(MethodHandles.constant(String.class, "Rocky"));
+assertEquals("ROCKY", (String) worker1.invokeExact());
+name.setTarget(MethodHandles.constant(String.class, "Fred"));
+assertEquals("FRED", (String) worker1.invokeExact());
+// (mutation can be continued indefinitely)
+ * </pre></blockquote>
+ * <p>
+ * The same call site may be used in several places at once.
+ * <blockquote><pre>
+MethodHandle MH_dear = MethodHandles.lookup()
+ .findVirtual(String.class, "concat", MT_str2).bindTo(", dear?");
+MethodHandle worker2 = MethodHandles.filterReturnValue(MH_name, MH_dear);
+assertEquals("Fred, dear?", (String) worker2.invokeExact());
+name.setTarget(MethodHandles.constant(String.class, "Wilma"));
+assertEquals("WILMA", (String) worker1.invokeExact());
+assertEquals("Wilma, dear?", (String) worker2.invokeExact());
+ * </pre></blockquote>
+ * <p>
+ * <em>Non-synchronization of target values:</em>
+ * A write to a mutable call site's target does not force other threads
+ * to become aware of the updated value. Threads which do not perform
+ * suitable synchronization actions relative to the updated call site
+ * may cache the old target value and delay their use of the new target
+ * value indefinitely.
+ * (This is a normal consequence of the Java Memory Model as applied
+ * to object fields.)
+ * <p>
+ * The {@link #sync sync} operation provides a way to force threads
+ * to accept a new target value, even if there is no other synchronization.
+ * <p>
+ * For target values which will be frequently updated, consider using
+ * a {@linkplain VolatileCallSite volatile call site} instead.
+ * @author John Rose, JSR 292 EG
+ */
+public class MutableCallSite extends CallSite {
+ /**
+ * Make a blank call site object with the given method type.
+ * An initial target method is supplied which will throw
+ * an {@link IllegalStateException} if called.
+ * <p>
+ * Before this {@code CallSite} object is returned from a bootstrap method,
+ * it is usually provided with a more useful target method,
+ * via a call to {@link CallSite#setTarget(MethodHandle) setTarget}.
+ * @throws NullPointerException if the proposed type is null
+ */
+ public MutableCallSite(MethodType type) {
+ super(type);
+ }
+
+ /**
+ * Make a blank call site object, possibly equipped with an initial target method handle.
+ * @param target the method handle which will be the initial target of the call site
+ * @throws NullPointerException if the proposed target is null
+ */
+ public MutableCallSite(MethodHandle target) {
+ super(target);
+ }
+
+ /**
+ * Perform a synchronization operation on each call site in the given array,
+ * forcing all other threads to throw away any cached values previously
+ * loaded from the target of any of the call sites.
+ * <p>
+ * This operation does not reverse any calls that have already started
+ * on an old target value.
+ * (Java supports {@linkplain java.lang.Object#wait() forward time travel} only.)
+ * <p>
+ * The overall effect is to force all future readers of each call site's target
+ * to accept the most recently stored value.
+ * ("Most recently" is reckoned relative to the {@code sync} itself.)
+ * Conversely, the {@code sync} call may block until all readers have
+ * (somehow) decached all previous versions of each call site's target.
+ * <p>
+ * To avoid race conditions, calls to {@code setTarget} and {@code sync}
+ * should generally be performed under some sort of mutual exclusion.
+ * Note that reader threads may observe an updated target as early
+ * as the {@code setTarget} call that install the value
+ * (and before the {@code sync} that confirms the value).
+ * On the other hand, reader threads may observe previous versions of
+ * the target until the {@code sync} call returns
+ * (and after the {@code setTarget} that attempts to convey the updated version).
+ * <p>
+ * In terms of the Java Memory Model, this operation performs a synchronization
+ * action which is comparable in effect to the writing of a volatile variable
+ * by the current thread, and an eventual volatile read by every other thread
+ * that may access one of the affected call sites.
+ * <p>
+ * The following effects are apparent, for each individual call site {@code S}:
+ * <ul>
+ * <li>A new volatile variable {@code V} is created, and written by the current thread.
+ * As defined by the JMM, this write is a global synchronization event.
+ * <li>As is normal with thread-local ordering of write events,
+ * every action already performed by the current thread is
+ * taken to happen before the volatile write to {@code V}.
+ * (In some implementations, this means that the current thread
+ * performs a global release operation.)
+ * <li>Specifically, the write to the current target of {@code S} is
+ * taken to happen before the volatile write to {@code V}.
+ * <li>The volatile write to {@code V} is placed
+ * (in an implementation specific manner)
+ * in the global synchronization order.
+ * <li>Consider an arbitrary thread {@code T} (other than the current thread).
+ * If {@code T} executes a synchronization action {@code A}
+ * after the volatile write to {@code V} (in the global synchronization order),
+ * it is therefore required to see either the current target
+ * of {@code S}, or a later write to that target,
+ * if it executes a read on the target of {@code S}.
+ * (This constraint is called "synchronization-order consistency".)
+ * <li>The JMM specifically allows optimizing compilers to elide
+ * reads or writes of variables that are known to be useless.
+ * Such elided reads and writes have no effect on the happens-before
+ * relation. Regardless of this fact, the volatile {@code V}
+ * will not be elided, even though its written value is
+ * indeterminate and its read value is not used.
+ * </ul>
+ * Because of the last point, the implementation behaves as if a
+ * volatile read of {@code V} were performed by {@code T}
+ * immediately after its action {@code A}. In the local ordering
+ * of actions in {@code T}, this read happens before any future
+ * read of the target of {@code S}. It is as if the
+ * implementation arbitrarily picked a read of {@code S}'s target
+ * by {@code T}, and forced a read of {@code V} to precede it,
+ * thereby ensuring communication of the new target value.
+ * <p>
+ * As long as the constraints of the Java Memory Model are obeyed,
+ * implementations may delay the completion of a {@code sync}
+ * operation while other threads ({@code T} above) continue to
+ * use previous values of {@code S}'s target.
+ * However, implementations are (as always) encouraged to avoid
+ * livelock, and to eventually require all threads to take account
+ * of the updated target.
+ * <p>
+ * This operation is likely to be expensive and should be used sparingly.
+ * If possible, it should be buffered for batch processing on sets of call sites.
+ * <p style="font-size:smaller;">
+ * (This is a static method on a set of call sites, not a
+ * virtual method on a single call site, for performance reasons.
+ * Some implementations may incur a large fixed overhead cost
+ * for processing one or more synchronization operations,
+ * but a small incremental cost for each additional call site.
+ * In any case, this operation is likely to be costly, since
+ * other threads may have to be somehow interrupted
+ * in order to make them notice the updated target value.
+ * However, it may be observed that a single call to synchronize
+ * several sites has the same formal effect as many calls,
+ * each on just one of the sites.)
+ * <p>
+ * Simple implementations of {@code MutableCallSite} may use
+ * a volatile variable for the target of a mutable call site.
+ * In such an implementation, the {@code sync} method can be a no-op,
+ * and yet it will conform to the JMM behavior documented above.
+ */
+ public static void sync(MutableCallSite[] sites) {
+ STORE_BARRIER.lazySet(0);
+ // FIXME: NYI
+ }
+ private static final AtomicInteger STORE_BARRIER = new AtomicInteger();
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/dyn/Switcher.java Tue Dec 21 18:45:45 2010 -0800
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.dyn;
+
+/**
+ * <p>
+ * A {@code Switcher} is an object which can publish state transitions to other threads.
+ * A switcher is initially in the <em>valid</em> state, but may at any time be
+ * changed to the <em>invalid</em> state. Invalidation cannot be reversed.
+ * <p>
+ * A single switcher may be used to create any number of guarded method handle pairs.
+ * Each guarded pair is wrapped in a new method handle {@code M},
+ * which is permanently associated with the switcher that created it.
+ * Each pair consists of a target {@code T} and a fallback {@code F}.
+ * While the switcher is valid, invocations to {@code M} are delegated to {@code T}.
+ * After it is invalidated, invocations are delegated to {@code F}.
+ * <p>
+ * Invalidation is global and immediate, as if the switcher contained a
+ * volatile boolean variable consulted on every call to {@code M}.
+ * The invalidation is also permanent, which means the switcher
+ * can change state only once.
+ * <p>
+ * Here is an example of a switcher in action:
+ * <blockquote><pre>
+MethodType MT_str2 = MethodType.methodType(String.class, String.class);
+MethodHandle MH_strcat = MethodHandles.lookup()
+ .findVirtual(String.class, "concat", MT_str2);
+Switcher switcher = new Switcher();
+// the following steps may be repeated to re-use the same switcher:
+MethodHandle worker1 = strcat;
+MethodHandle worker2 = MethodHandles.permuteArguments(strcat, MT_str2, 1, 0);
+MethodHandle worker = switcher.guardWithTest(worker1, worker2);
+assertEquals("method", (String) worker.invokeExact("met", "hod"));
+switcher.invalidate();
+assertEquals("hodmet", (String) worker.invokeExact("met", "hod"));
+ * </pre></blockquote>
+ * <p>
+ * <em>Implementation Note:</em>
+ * A switcher behaves as if implemented on top of {@link MutableCallSite},
+ * approximately as follows:
+ * <blockquote><pre>
+public class Switcher {
+ private static final MethodHandle
+ K_true = MethodHandles.constant(boolean.class, true),
+ K_false = MethodHandles.constant(boolean.class, false);
+ private final MutableCallSite mcs;
+ private final MethodHandle mcsInvoker;
+ public Switcher() {
+ this.mcs = new MutableCallSite(K_true);
+ this.mcsInvoker = mcs.dynamicInvoker();
+ }
+ public MethodHandle guardWithTest(
+ MethodHandle target, MethodHandle fallback) {
+ // Note: mcsInvoker is of type boolean().
+ // Target and fallback may take any arguments, but must have the same type.
+ return MethodHandles.guardWithTest(this.mcsInvoker, target, fallback);
+ }
+ public static void invalidateAll(Switcher[] switchers) {
+ List<MutableCallSite> mcss = new ArrayList<>();
+ for (Switcher s : switchers) mcss.add(s.mcs);
+ for (MutableCallSite mcs : mcss) mcs.setTarget(K_false);
+ MutableCallSite.sync(mcss.toArray(new MutableCallSite[0]));
+ }
+}
+ * </pre></blockquote>
+ * @author Remi Forax, JSR 292 EG
+ */
+public class Switcher {
+ private static final MethodHandle
+ K_true = MethodHandles.constant(boolean.class, true),
+ K_false = MethodHandles.constant(boolean.class, false);
+
+ private final MutableCallSite mcs;
+ private final MethodHandle mcsInvoker;
+
+ /** Create a switcher. */
+ public Switcher() {
+ this.mcs = new MutableCallSite(K_true);
+ this.mcsInvoker = mcs.dynamicInvoker();
+ }
+
+ /**
+ * Return a method handle which always delegates either to the target or the fallback.
+ * The method handle will delegate to the target exactly as long as the switcher is valid.
+ * After that, it will permanently delegate to the fallback.
+ * <p>
+ * The target and fallback must be of exactly the same method type,
+ * and the resulting combined method handle will also be of this type.
+ * @see MethodHandles#guardWithTest
+ */
+ public MethodHandle guardWithTest(MethodHandle target, MethodHandle fallback) {
+ if (mcs.getTarget() == K_false)
+ return fallback; // already invalid
+ return MethodHandles.guardWithTest(mcsInvoker, target, fallback);
+ }
+
+ /** Set all of the given switchers into the invalid state. */
+ public static void invalidateAll(Switcher[] switchers) {
+ MutableCallSite[] sites = new MutableCallSite[switchers.length];
+ int fillp = 0;
+ for (Switcher switcher : switchers) {
+ sites[fillp++] = switcher.mcs;
+ switcher.mcs.setTarget(K_false);
+ }
+ MutableCallSite.sync(sites);
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/java/dyn/VolatileCallSite.java Tue Dec 21 18:45:45 2010 -0800
@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package java.dyn;
+
+import java.util.List;
+
+/**
+ * A {@code VolatileCallSite} is a {@link CallSite} whose target acts like a volatile variable.
+ * An {@code invokedynamic} instruction linked to a {@code VolatileCallSite} sees updates
+ * to its call site target immediately, even if the update occurs in another thread.
+ * There may be a performance penalty for such tight coupling between threads.
+ * <p>
+ * Unlike {@code MutableCallSite}, there is no
+ * {@linkplain MutableCallSite#sync sync operation} on volatile
+ * call sites, since every write to a volatile variable is implicitly
+ * synchronized with reader threads.
+ * <p>
+ * In other respects, a {@code VolatileCallSite} is interchangeable
+ * with {@code MutableCallSite}.
+ * @see MutableCallSite
+ * @author John Rose, JSR 292 EG
+ */
+public class VolatileCallSite extends CallSite {
+ /** Create a call site with a volatile target.
+ * The initial target is set to a method handle
+ * of the given type which will throw {@code IllegalStateException}.
+ * @throws NullPointerException if the proposed type is null
+ */
+ public VolatileCallSite(MethodType type) {
+ super(type);
+ }
+
+ /** Create a call site with a volatile target.
+ * The target is set to the given value.
+ * @throws NullPointerException if the proposed target is null
+ */
+ public VolatileCallSite(MethodHandle target) {
+ super(target);
+ }
+
+ /** Internal override to nominally final getTarget. */
+ @Override
+ MethodHandle getTarget0() {
+ return getTargetVolatile();
+ }
+
+ /**
+ * Set the target method of this call site, as a volatile variable.
+ * Has the same effect as {@link CallSite#setTarget CallSite.setTarget}, with the additional
+ * effects associated with volatiles, in the Java Memory Model.
+ */
+ @Override public void setTarget(MethodHandle newTarget) {
+ checkTargetChange(getTargetVolatile(), newTarget);
+ setTargetVolatile(newTarget);
+ }
+}
--- a/jdk/src/share/classes/java/dyn/package-info.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/java/dyn/package-info.java Tue Dec 21 18:45:45 2010 -0800
@@ -24,7 +24,6 @@
*/
/**
- * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
* This package contains dynamic language support provided directly by
* the Java core class libraries and virtual machine.
* <p>
@@ -42,13 +41,6 @@
* argument and return value conversions are applied.
* </li>
*
- * <li>In source code, the class {@link java.dyn.InvokeDynamic InvokeDynamic} appears to accept
- * any static method invocation, of any name and any signature.
- * But instead of emitting
- * an {@code invokestatic} instruction for such a call, the Java compiler emits
- * an {@code invokedynamic} instruction with the given name and signature.
- * </li>
- *
* <li>The JVM bytecode format supports immediate constants of
* the classes {@link java.dyn.MethodHandle MethodHandle} and {@link java.dyn.MethodType MethodType}.
* </li>
@@ -56,51 +48,68 @@
*
* <h2><a name="jvm_mods"></a>Corresponding JVM bytecode format changes</h2>
* <em>The following low-level information is presented here as a preview of
- * changes being made to the Java Virtual Machine specification for JSR 292.</em>
+ * changes being made to the Java Virtual Machine specification for JSR 292.
+ * This information will be incorporated in a future version of the JVM specification.</em>
*
- * <h3>{@code invokedynamic} instruction format</h3>
+ * <h3><a name="indyinsn"></a>{@code invokedynamic} instruction format</h3>
* In bytecode, an {@code invokedynamic} instruction is formatted as five bytes.
* The first byte is the opcode 186 (hexadecimal {@code BA}).
* The next two bytes are a constant pool index (in the same format as for the other {@code invoke} instructions).
* The final two bytes are reserved for future use and required to be zero.
* The constant pool reference of an {@code invokedynamic} instruction is to a entry
- * with tag {@code CONSTANT_InvokeDynamic} (decimal 17). See below for its format.
- * The entry specifies the bootstrap method (a {@link java.dyn.MethodHandle MethodHandle} constant),
- * the dynamic invocation name, and the argument types and return type of the call.
+ * with tag {@code CONSTANT_InvokeDynamic} (decimal 18). See below for its format.
+ * (The tag value 17 is also temporarily allowed. See below.)
+ * The entry specifies the following information:
+ * <ul>
+ * <li>a bootstrap method (a {@link java.dyn.MethodHandle MethodHandle} constant)</li>
+ * <li>the dynamic invocation name (a UTF8 string)</li>
+ * <li>the argument and return types of the call (encoded as a signature in a UTF8 string)</li>
+ * <li>optionally, a sequence of additional <em>static arguments</em> to the bootstrap method ({@code ldc}-type constants)</li>
+ * </ul>
* <p>
* Each instance of an {@code invokedynamic} instruction is called a <em>dynamic call site</em>.
* Multiple instances of an {@code invokedynamic} instruction can share a single
* {@code CONSTANT_InvokeDynamic} entry.
* In any case, distinct call sites always have distinct linkage state.
* <p>
- * Moreover, for the purpose of distinguishing dynamic call sites,
- * the JVM is allowed (but not required) to make internal copies
- * of {@code invokedynamic} instructions, each one
- * constituting a separate dynamic call site with its own linkage state.
- * Such copying, if it occurs, cannot be observed except indirectly via
- * execution of bootstrap methods and target methods.
- * <p>
* A dynamic call site is originally in an unlinked state. In this state, there is
* no target method for the call site to invoke.
* A dynamic call site is linked by means of a bootstrap method,
* as <a href="#bsm">described below</a>.
- * <p>
- * <em>(Historic Note: Some older JVMs may allow the index of a {@code CONSTANT_NameAndType}
+ *
+ * <p style="font-size:smaller;">
+ * (Historic Note: Some older JVMs may allow the index of a {@code CONSTANT_NameAndType}
* instead of a {@code CONSTANT_InvokeDynamic}. In earlier, obsolete versions of this API, the
- * bootstrap method was specified dynamically, in a per-class basis, during class initialization.)</em>
+ * bootstrap method was specified dynamically, in a per-class basis, during class initialization.)
*
- * <h3>constant pool entries for {@code invokedynamic} instructions</h3>
- * If a constant pool entry has the tag {@code CONSTANT_InvokeDynamic} (decimal 17),
- * it must contain exactly four more bytes.
- * The first two bytes after the tag must be an index to a {@code CONSTANT_MethodHandle}
- * entry, and the second two bytes must be an index to a {@code CONSTANT_NameAndType}.
+ * <h3><a name="indycon"></a>constant pool entries for {@code invokedynamic} instructions</h3>
+ * If a constant pool entry has the tag {@code CONSTANT_InvokeDynamic} (decimal 18),
+ * it must contain exactly four more bytes after the tag.
+ * These bytes are interpreted as two 16-bit indexes, in the usual {@code u2} format.
+ * The first pair of bytes after the tag must be an index into a side table called the
+ * <em>bootstrap method table</em>, which is stored in the {@code BootstrapMethods}
+ * attribute as <a href="#bsmattr">described below</a>.
+ * The second pair of bytes must be an index to a {@code CONSTANT_NameAndType}.
+ * This table is not part of the constant pool. Instead, it is stored
+ * in a class attribute named {@code BootstrapMethods}, described below.
+ * <p>
* The first index specifies a bootstrap method used by the associated dynamic call sites.
* The second index specifies the method name, argument types, and return type of the dynamic call site.
* The structure of such an entry is therefore analogous to a {@code CONSTANT_Methodref},
- * except that the {@code CONSTANT_Class} reference in a {@code CONSTANT_Methodref} entry
- * is replaced by a bootstrap method reference.
+ * except that the bootstrap method specifier reference replaces
+ * the {@code CONSTANT_Class} reference of a {@code CONSTANT_Methodref} entry.
+ * <p>
+ * Some older JVMs may allow an older constant pool entry tag of decimal 17.
+ * The format and behavior of a constant pool entry with this tag is identical to
+ * an entry with a tag of decimal 18, except that the first index refers directly
+ * to a {@code CONSTANT_MethodHandle} to use as the bootstrap method.
+ * This format does not require the bootstrap method table.
*
- * <h3>constant pool entries for {@code MethodType}s</h3>
+ * <p style="font-size:smaller;">
+ * <em>(Note: The Proposed Final Draft of this specification is likely to support
+ * only the tag 18, not the tag 17.)</em>
+ *
+ * <h3><a name="mtcon"></a>constant pool entries for {@linkplain java.dyn.MethodType method types}</h3>
* If a constant pool entry has the tag {@code CONSTANT_MethodType} (decimal 16),
* it must contain exactly two more bytes, which must be an index to a {@code CONSTANT_Utf8}
* entry which represents a method type signature.
@@ -113,7 +122,7 @@
* Access checking and error reporting is performed exactly as it is for
* references by {@code ldc} instructions to {@code CONSTANT_Class} constants.
*
- * <h3>constant pool entries for {@code MethodHandle}s</h3>
+ * <h3><a name="mhcon"></a>constant pool entries for {@linkplain java.dyn.MethodHandle method handles}</h3>
* If a constant pool entry has the tag {@code CONSTANT_MethodHandle} (decimal 15),
* it must contain exactly three more bytes. The first byte after the tag is a subtag
* value which must be in the range 1 through 9, and the last two must be an index to a
@@ -129,7 +138,7 @@
* <p>
* As with {@code CONSTANT_Class} and {@code CONSTANT_MethodType} constants,
* the {@code Class} or {@code MethodType} object which reifies the field or method's
- * type is created. Any classes mentioned in this reificaiton will be loaded if necessary,
+ * type is created. Any classes mentioned in this reification will be loaded if necessary,
* but not initialized, and access checking and error reporting performed as usual.
* <p>
* The method handle itself will have a type and behavior determined by the subtag as follows:
@@ -148,16 +157,45 @@
* </table>
* </code>
* <p>
- * The special names {@code <init>} and {@code <clinit>} are not allowed except for subtag 8 as shown.
+ * The special name {@code <clinit>} is not allowed.
+ * The special name {@code <init>} is not allowed except for subtag 8 as shown.
* <p>
- * The verifier applies the same access checks and restrictions for these references as for the hypothetical
+ * The JVM verifier and linker apply the same access checks and restrictions for these references as for the hypothetical
* bytecode instructions specified in the last column of the table. In particular, method handles to
* private and protected members can be created in exactly those classes for which the corresponding
* normal accesses are legal.
* <p>
- * None of these constant types force class initialization.
- * Method handles for subtags {@code REF_getStatic}, {@code REF_putStatic}, and {@code REF_invokeStatic}
+ * A constant may refer to a method or constructor with the {@code varargs}
+ * bit (hexadecimal {@code 80}) set in its modifier bitmask.
+ * The method handle constant produced for such a method behaves the same
+ * as if the {@code varargs} bit were not set.
+ * The argument-collecting behavior of {@code varargs} can be emulated by
+ * adapting the method handle constant with
+ * {@link java.dyn.MethodHandle#asCollector asCollector}.
+ * There is no provision for doing this automatically.
+ * <p>
+ * Although the {@code CONSTANT_MethodHandle} and {@code CONSTANT_MethodType} constant types
+ * resolve class names, they do not force class initialization.
+ * Method handle constants for subtags {@code REF_getStatic}, {@code REF_putStatic}, and {@code REF_invokeStatic}
* may force class initialization on their first invocation, just like the corresponding bytecodes.
+ * <p>
+ * The rules of section 5.4.3 of the
+ * <a href="http://java.sun.com/docs/books/jvms/second_edition/html/ConstantPool.doc.html#73492">JVM Specification</a>
+ * apply to the resolution of {@code CONSTANT_MethodType}, {@code CONSTANT_MethodHandle},
+ * and {@code CONSTANT_InvokeDynamic} constants,
+ * by the execution of {@code invokedynamic} and {@code ldc} instructions.
+ * (Roughly speaking, this means that every use of a constant pool entry
+ * must lead to the same outcome.
+ * If the resoultion succeeds, the same object reference is produced
+ * by every subsequent execution of the same instruction.
+ * If the resolution of the constant causes an error to occur,
+ * the same error will be re-thrown on every subsequent attempt
+ * to use this particular constant.)
+ * <p>
+ * Constants created by the resolution of these constant pool types are not necessarily
+ * interned. Except for {@link CONSTANT_Class} and {@link CONSTANT_String} entries,
+ * two distinct constant pool entries might not resolve to the same reference
+ * even if they contain the same symbolic reference.
*
* <h2><a name="bsm"></a>Bootstrap Methods</h2>
* Before the JVM can execute a dynamic call site (an {@code invokedynamic} instruction),
@@ -181,24 +219,36 @@
* call site execution.
* Linkage does not trigger class initialization.
* <p>
- * Next, the bootstrap method call is started, with four values being stacked:
+ * Next, the bootstrap method call is started, with four or five values being stacked:
* <ul>
* <li>a {@code MethodHandle}, the resolved bootstrap method itself </li>
- * <li>a {@code Class}, the <em>caller class</em> in which dynamic call site occurs </li>
+ * <li>a {@code MethodHandles.Lookup}, a lookup object on the <em>caller class</em> in which dynamic call site occurs </li>
* <li>a {@code String}, the method name mentioned in the call site </li>
* <li>a {@code MethodType}, the resolved type signature of the call </li>
+ * <li>optionally, a single object representing one or more <a href="#args">additional static arguments</a> </li>
* </ul>
* The method handle is then applied to the other values as if by
- * {@linkplain java.dyn.MethodHandle#invokeGeneric the <code>invokeGeneric</code> method}.
- * The returned result must be a {@link java.dyn.CallSite CallSite}, a {@link java.dyn.MethodHandle MethodHandle},
- * or another {@link java.dyn.MethodHandleProvider MethodHandleProvider} value.
- * The method {@linkplain java.dyn.MethodHandleProvider#asMethodHandle asMethodHandle}
- * is then called on the returned value. The result of that second
- * call is the {@code MethodHandle} which becomes the
- * permanent binding for the dynamic call site.
- * That method handle's type must be exactly equal to the type
+ * {@link java.dyn.MethodHandle#invokeGeneric invokeGeneric}.
+ * The returned result must be a {@link java.dyn.CallSite CallSite} (or a subclass).
+ * The type of the call site's target must be exactly equal to the type
* derived from the dynamic call site signature and passed to
* the bootstrap method.
+ * The call site then becomes permanently linked to the dynamic call site.
+ * <p>
+ * As long as each bootstrap method can be correctly invoked
+ * by <code>invokeGeneric</code>, its detailed type is arbitrary.
+ * For example, the first argument could be {@code Object}
+ * instead of {@code MethodHandles.Lookup}, and the return type
+ * could also be {@code Object} instead of {@code CallSite}.
+ * <p>
+ * As with any method handle constant, a {@code varargs} modifier bit
+ * on the bootstrap method is ignored.
+ * <p>
+ * Note that the first argument of the bootstrap method cannot be
+ * a simple {@code Class} reference. (This is a change from earlier
+ * versions of this specification. If the caller class is needed,
+ * it is easy to {@linkplain java.dyn.MethodHandles.Lookup#lookupClass() extract it}
+ * from the {@code Lookup} object.)
* <p>
* After resolution, the linkage process may fail in a variety of ways.
* All failures are reported by an {@link java.dyn.InvokeDynamicBootstrapError InvokeDynamicBootstrapError},
@@ -206,81 +256,209 @@
* site execution.
* The following circumstances will cause this:
* <ul>
+ * <li>the index to the bootstrap method specifier is out of range </li>
+ * <li>the bootstrap method cannot be resolved </li>
+ * <li>the {@code MethodType} to pass to the bootstrap method cannot be resolved </li>
+ * <li>a static argument to the bootstrap method cannot be resolved
+ * (i.e., a {@code CONSTANT_Class}, {@code CONSTANT_MethodType},
+ * or {@code CONSTANT_MethodHandle} argument cannot be linked) </li>
+ * <li>the bootstrap method has the wrong arity,
+ * causing {@code invokeGeneric} to throw {@code WrongMethodTypeException} </li>
+ * <li>the bootstrap method has a wrong argument or return type </li>
* <li>the bootstrap method invocation completes abnormally </li>
* <li>the result from the bootstrap invocation is not a reference to
- * an object of type {@link java.dyn.MethodHandleProvider MethodHandleProvider} </li>
- * <li>the call to {@code asMethodHandle} completes abnormally </li>
- * <li>the call to {@code asMethodHandle} fails to return a reference to
- * an object of type {@link java.dyn.MethodHandle MethodHandle} </li>
- * <li>the method handle produced by {@code asMethodHandle} does not have
+ * an object of type {@link java.dyn.CallSite CallSite} </li>
+ * <li>the target of the {@code CallSite} does not have a target of
* the expected {@code MethodType} </li>
* </ul>
- * <h3>timing of linkage</h3>
+ *
+ * <h3><a name="linktime"></a>timing of linkage</h3>
* A dynamic call site is linked just before its first execution.
* The bootstrap method call implementing the linkage occurs within
* a thread that is attempting a first execution.
* <p>
- * If there are several such threads, the JVM picks one thread
- * and runs the bootstrap method while the others wait for the
- * invocation to terminate normally or abnormally.
- * <p>
- * After a bootstrap method is called and a method handle target
- * successfully extracted, the JVM attempts to link the instruction
- * being executed to the target method handle.
- * This may fail if there has been intervening linkage
- * or invalidation event for the same instruction.
- * If such a failure occurs, the dynamic call site must be
- * re-executed from the beginning, either re-linking it
- * (if it has been invalidated) or invoking the target
- * (if it the instruction has been linked by some other means).
- * <p>
- * If the instruction is linked successfully, the target method
- * handle is invoked to complete the instruction execution.
- * The state of linkage continues until the method containing the
- * dynamic call site is garbage collected, or the dynamic call site
- * is invalidated by an explicit request,
- * such as {@link java.dyn.Linkage#invalidateCallerClass Linkage.invalidateCallerClass}.
+ * If there are several such threads, the bootstrap method may be
+ * invoked in several threads concurrently.
+ * Therefore, bootstrap methods which access global application
+ * data must take the usual precautions against race conditions.
+ * In any case, every {@code invokedynamic} instruction is either
+ * unlinked or linked to a unique {@code CallSite} object.
* <p>
* In an application which requires dynamic call sites with individually
* mutable behaviors, their bootstrap methods should produce distinct
* {@link java.dyn.CallSite CallSite} objects, one for each linkage request.
- * <p>
- * If a class containing {@code invokedynamic} instructions
- * is {@linkplain java.dyn.Linkage#invalidateCallerClass(Class) invalidated},
- * subsequent execution of those {@code invokedynamic} instructions
- * will require linking.
- * It is as if they had never been executed in the first place.
- * (However, invalidation does not cause constant pool entries to be
- * resolved a second time.)
- * <p>
- * Invalidation events and bootstrap method calls for a particular
- * dynamic call site are globally ordered relative to each other.
- * When an invokedynamic instruction is invalidated, if there is
- * simultaneously a bootstrap method invocation in process
- * (in the same thread or a different thread), the result
- * eventually returned must not be used to link the call site.
- * Put another way, when a call site is invalidated, its
- * subsequent linkage (if any) must be performed by a bootstrap method
- * call initiated after the invalidation occurred.
+ * Alternatively, an application can link a single {@code CallSite} object
+ * to several {@code invokedynamic} instructions, in which case
+ * a change to the target method will become visible at each of
+ * the instructions.
* <p>
* If several threads simultaneously execute a bootstrap method for a single dynamic
- * call site, the JVM must choose one target object and installs it visibly to
+ * call site, the JVM must choose one {@code CallSite} object and install it visibly to
* all threads. Any other bootstrap method calls are allowed to complete, but their
* results are ignored, and their dynamic call site invocations proceed with the originally
* chosen target object.
+ *
+ * <p style="font-size:smaller;">
+ * (Historic Note: Unlike some previous versions of this specification,
+ * these rules do not enable the JVM to duplicate dynamic call sites,
+ * or to issue “causeless” bootstrap method calls.
+ * Every dynamic call site transitions at most once from unlinked to linked,
+ * just before its first invocation.)
+ *
+ * <h3><a name="bsmattr">the {@code BootstrapMethods} attribute </h3>
+ * Each {@code CONSTANT_InvokeDynamic} entry contains an index which references
+ * a bootstrap method specifier; all such specifiers are contained in a separate array.
+ * This array is defined by a class attribute named {@code BootstrapMethods}.
+ * The body of this attribute consists of a sequence of byte pairs, all interpreted as
+ * as 16-bit counts or constant pool indexes, in the {@code u2} format.
+ * The attribute body starts with a count of bootstrap method specifiers,
+ * which is immediately followed by the sequence of specifiers.
* <p>
- * The JVM is free to duplicate dynamic call sites.
- * This means that, even if a class contains just one {@code invokedynamic}
- * instruction, its bootstrap method may be executed several times,
- * once for each duplicate. Thus, bootstrap method code should not
- * assume an exclusive one-to-one correspondence between particular occurrences
- * of {@code invokedynamic} bytecodes in class files and linkage events.
+ * Each bootstrap method specifier contains an index to a
+ * {@code CONSTANT_MethodHandle} constant, which is the bootstrap
+ * method itself.
+ * This is followed by a count, and then a sequence (perhaps empty) of
+ * indexes to <a href="#args">additional static arguments</a>
+ * for the bootstrap method.
+ * <p>
+ * During class loading, the verifier must check the structure of the
+ * {@code BootstrapMethods} attribute. In particular, each constant
+ * pool index must be of the correct type. A bootstrap method index
+ * must refer to a {@code CONSTANT_MethodHandle} (tag 15).
+ * Every other index must refer to a valid operand of an
+ * {@code ldc_w} or {@code ldc2_w} instruction (tag 3..8 or 15..16).
+ *
+ * <h3><a name="args">static arguments to the bootstrap method</h3>
+ * An {@code invokedynamic} instruction specifies at least three arguments
+ * to pass to its bootstrap method:
+ * The caller class (expressed as a {@link java.dyn.MethodHandles.Lookup Lookup object},
+ * the name (extracted from the {@code CONSTANT_NameAndType} entry),
+ * and the type (also extracted from the {@code CONSTANT_NameAndType} entry).
+ * The {@code invokedynamic} instruction may specify additional metadata values
+ * to pass to its bootstrap method.
+ * Collectively, these values are called <em>static arguments</em> to the
+ * {@code invokedynamic} instruction, because they are used once at link
+ * time to determine the instruction's behavior on subsequent sets of
+ * <em>dynamic arguments</em>.
+ * <p>
+ * Static arguments are used to communicate application-specific meta-data
+ * to the bootstrap method.
+ * Drawn from the constant pool, they may include references to classes, method handles,
+ * strings, or numeric data that may be relevant to the task of linking that particular call site.
+ * <p>
+ * Static arguments are specified constant pool indexes stored in the {@code BootstrapMethods} attribute.
+ * Before the bootstrap method is invoked, each index is used to compute an {@code Object}
+ * reference to the indexed value in the constant pool.
+ * If the value is a primitive type, it is converted to a reference by boxing conversion.
+ * The valid constant pool entries are listed in this table:
+ * <code>
+ * <table border=1 cellpadding=5 summary="Static argument types">
+ * <tr><th>entry type</th><th>argument type</th><th>argument value</th></tr>
+ * <tr><td>CONSTANT_String</td><td><code>java.lang.String</code></td><td>the indexed string literal</td></tr>
+ * <tr><td>CONSTANT_Class</td><td><code>java.lang.Class</code></td><td>the indexed class, resolved</td></tr>
+ * <tr><td>CONSTANT_Integer</td><td><code>java.lang.Integer</code></td><td>the indexed int value</td></tr>
+ * <tr><td>CONSTANT_Long</td><td><code>java.lang.Long</code></td><td>the indexed long value</td></tr>
+ * <tr><td>CONSTANT_Float</td><td><code>java.lang.Float</code></td><td>the indexed float value</td></tr>
+ * <tr><td>CONSTANT_Double</td><td><code>java.lang.Double</code></td><td>the indexed double value</td></tr>
+ * <tr><td>CONSTANT_MethodHandle</td><td><code>java.dyn.MethodHandle</code></td><td>the indexed method handle constant</td></tr>
+ * <tr><td>CONSTANT_MethodType</td><td><code>java.dyn.MethodType</code></td><td>the indexed method type constant</td></tr>
+ * </table>
+ * </code>
+ * <p>
+ * If a given {@code invokedynamic} instruction specifies no static arguments,
+ * the instruction's bootstrap method will be invoked on three arguments,
+ * conveying the instruction's caller class, name, and method type.
+ * If the {@code invokedynamic} instruction specifies one or more static arguments,
+ * a fourth argument will be passed to the bootstrap argument,
+ * either an {@code Object} reference to the sole extra argument (if there is one)
+ * or an {@code Object} array of references to all the arguments (if there are two or more),
+ * as if the bootstrap method is a variable-arity method.
+ * <code>
+ * <table border=1 cellpadding=5 summary="Static argument types">
+ * <tr><th>N</th><th>sample bootstrap method</th></tr>
+ * <tr><td>0</td><td><code>CallSite bootstrap(Lookup caller, String name, MethodType type)</code></td></tr>
+ * <tr><td>1</td><td><code>CallSite bootstrap(Lookup caller, String name, MethodType type, Object arg)</code></td></tr>
+ * <tr><td>2</td><td><code>CallSite bootstrap(Lookup caller, String name, MethodType type, Object... args)</code></td></tr>
+ * </table>
+ * </code>
* <p>
- * In principle, each individual execution of an {@code invokedynamic}
- * instruction could be deemed (by a conforming implementation) to be a separate
- * duplicate, requiring its own execution of the bootstrap method.
- * However, implementations are expected to perform code duplication
- * (if at all) in order to improve performance, not make it worse.
+ * The argument and return types listed here are used by the {@code invokeGeneric}
+ * call to the bootstrap method.
+ * As noted above, the actual method type of the bootstrap method can vary.
+ * For example, the fourth argument could be {@code MethodHandle},
+ * if that is the type of the corresponding constant in
+ * the {@code CONSTANT_InvokeDynamic} entry.
+ * In that case, the {@code invokeGeneric} call will pass the extra method handle
+ * constant as an {@code Object}, but the type matching machinery of {@code invokeGeneric}
+ * will cast the reference back to {@code MethodHandle} before invoking the bootstrap method.
+ * (If a string constant were passed instead, by badly generated code, that cast would then fail.)
+ * <p>
+ * If the fourth argument is an array, the array element type must be {@code Object},
+ * since object arrays (as produced by the JVM at this point) cannot be converted
+ * to other array types.
+ * <p>
+ * If an array is provided, it will appear to be freshly allocated.
+ * That is, the same array will not appear to two bootstrap method calls.
+ * <p>
+ * Extra bootstrap method arguments are intended to allow language implementors
+ * to safely and compactly encode metadata.
+ * In principle, the name and extra arguments are redundant,
+ * since each call site could be given its own unique bootstrap method.
+ * Such a practice is likely to produce large class files and constant pools.
+ *
+ * <p style="font-size:smaller;">
+ * <em>PROVISIONAL API, WORK IN PROGRESS:</em>
+ * (Usage Note: There is no mechanism for specifying five or more positional arguments to the bootstrap method.
+ * If there are two or more arguments, the Java code of the bootstrap method is required to extract them from
+ * a varargs-style object array.
+ * This design uses varargs because it anticipates some use cases where bootstrap arguments
+ * contribute components of variable-length structures, such as virtual function tables
+ * or interpreter token streams.
+ * Such parameters would be awkward or impossible to manage if represented
+ * as normal positional method arguments,
+ * since there would need to be one Java method per length.
+ * On balance, leaving out the varargs feature would cause more trouble to users than keeping it.
+ * Also, this design allows bootstrap methods to be called in a limited JVM stack depth.
+ * At both the user and JVM level, the difference between varargs and non-varargs
+ * calling sequences can easily be bridged via the
+ * {@link java.dyn.MethodHandle#asSpreader asSpreader}
+ * and {@link java.dyn.MethodHandle#asSpreader asCollector} methods.)
+ *
+ * <h2><a name="structs"></a>Structure Summary</h2>
+ * <blockquote><pre>// summary of constant and attribute structures
+struct CONSTANT_MethodHandle_info {
+ u1 tag = 15;
+ u1 reference_kind; // 1..8 (one of REF_invokeVirtual, etc.)
+ u2 reference_index; // index to CONSTANT_Fieldref or *Methodref
+}
+struct CONSTANT_MethodType_info {
+ u1 tag = 16;
+ u2 descriptor_index; // index to CONSTANT_Utf8, as in NameAndType
+}
+struct CONSTANT_InvokeDynamic_17_info {
+ u1 tag = 17;
+ u2 bootstrap_method_index; // index to CONSTANT_MethodHandle
+ u2 name_and_type_index; // same as for CONSTANT_Methodref, etc.
+}
+struct CONSTANT_InvokeDynamic_info {
+ u1 tag = 18;
+ u2 bootstrap_method_attr_index; // index into BootstrapMethods_attr
+ u2 name_and_type_index; // index to CONSTANT_NameAndType, as in Methodref
+}
+struct BootstrapMethods_attr {
+ u2 name; // CONSTANT_Utf8 = "BootstrapMethods"
+ u4 size;
+ u2 bootstrap_method_count;
+ struct bootstrap_method_specifier {
+ u2 bootstrap_method_ref; // index to CONSTANT_MethodHandle
+ u2 bootstrap_argument_count;
+ u2 bootstrap_arguments[bootstrap_argument_count]; // constant pool indexes
+ } bootstrap_methods[bootstrap_method_count];
+}
+ * </pre></blockquote>
+ * <p>
+ * <em>Note: The Proposed Final Draft of JSR 292 may remove the constant tag 17,
+ * for the sake of simplicity.</em>
*
* @author John Rose, JSR 292 EG
*/
--- a/jdk/src/share/classes/sun/dyn/AdapterMethodHandle.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/AdapterMethodHandle.java Tue Dec 21 18:45:45 2010 -0800
@@ -478,6 +478,39 @@
return new AdapterMethodHandle(target, newType, makeConv(raw ? OP_RETYPE_RAW : OP_RETYPE_ONLY));
}
+ static MethodHandle makeTypeHandler(Access token,
+ MethodHandle target, MethodHandle typeHandler) {
+ Access.check(token);
+ return new WithTypeHandler(target, typeHandler);
+ }
+
+ static class WithTypeHandler extends AdapterMethodHandle {
+ final MethodHandle target, typeHandler;
+ WithTypeHandler(MethodHandle target, MethodHandle typeHandler) {
+ super(target, target.type(), makeConv(OP_RETYPE_ONLY));
+ this.target = target;
+ this.typeHandler = typeHandler.asType(TYPE_HANDLER_TYPE);
+ }
+
+ public MethodHandle asType(MethodType newType) {
+ if (this.type() == newType)
+ return this;
+ try {
+ MethodHandle retyped = (MethodHandle) typeHandler.invokeExact(target, newType);
+ // Contract: Must return the desired type, or throw WMT
+ if (retyped.type() != newType)
+ throw new WrongMethodTypeException(retyped.toString());
+ return retyped;
+ } catch (Throwable ex) {
+ if (ex instanceof Error) throw (Error)ex;
+ if (ex instanceof RuntimeException) throw (RuntimeException)ex;
+ throw new RuntimeException(ex);
+ }
+ }
+ private static final MethodType TYPE_HANDLER_TYPE
+ = MethodType.methodType(MethodHandle.class, MethodHandle.class, MethodType.class);
+ }
+
/** Can a checkcast adapter validly convert the target to newType?
* The JVM supports all kind of reference casts, even silly ones.
*/
--- a/jdk/src/share/classes/sun/dyn/BoundMethodHandle.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/BoundMethodHandle.java Tue Dec 21 18:45:45 2010 -0800
@@ -103,21 +103,20 @@
super(Access.TOKEN, type);
this.argument = argument;
this.vmargslot = vmargslot;
- assert(this.getClass() == AdapterMethodHandle.class);
+ assert(this instanceof AdapterMethodHandle);
}
- /** Initialize the current object as a Java method handle, binding it
+ /** Initialize the current object as a self-bound method handle, binding it
* as the first argument of the method handle {@code entryPoint}.
* The invocation type of the resulting method handle will be the
* same as {@code entryPoint}, except that the first argument
* type will be dropped.
*/
- protected BoundMethodHandle(MethodHandle entryPoint) {
- super(Access.TOKEN, entryPoint.type().dropParameterTypes(0, 1));
+ protected BoundMethodHandle(Access token, MethodHandle entryPoint) {
+ super(token, entryPoint.type().dropParameterTypes(0, 1));
this.argument = this; // kludge; get rid of
this.vmargslot = this.type().parameterSlotDepth(0);
initTarget(entryPoint, 0);
- assert(this instanceof JavaMethodHandle);
}
/** Make sure the given {@code argument} can be used as {@code argnum}-th
@@ -173,6 +172,11 @@
@Override
public String toString() {
+ return MethodHandleImpl.addTypeString(baseName(), this);
+ }
+
+ /** Component of toString() before the type string. */
+ protected String baseName() {
MethodHandle mh = this;
while (mh instanceof BoundMethodHandle) {
Object info = MethodHandleNatives.getTargetInfo(mh);
@@ -185,12 +189,16 @@
if (name != null)
return name;
else
- return super.toString(); // <unknown>, probably
+ return noParens(super.toString()); // "invoke", probably
}
assert(mh != this);
- if (mh instanceof JavaMethodHandle)
- break; // access JMH.toString(), not BMH.toString()
}
- return mh.toString();
+ return noParens(mh.toString());
+ }
+
+ private static String noParens(String str) {
+ int paren = str.indexOf('(');
+ if (paren >= 0) str = str.substring(0, paren);
+ return str;
}
}
--- a/jdk/src/share/classes/sun/dyn/CallSiteImpl.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/CallSiteImpl.java Tue Dec 21 18:45:45 2010 -0800
@@ -41,31 +41,45 @@
Object info,
// Caller information:
MemberName callerMethod, int callerBCI) {
- Class<?> caller = callerMethod.getDeclaringClass();
+ Class<?> callerClass = callerMethod.getDeclaringClass();
+ Object caller;
+ if (bootstrapMethod.type().parameterType(0) == Class.class)
+ caller = callerClass; // remove for PFD
+ else
+ caller = MethodHandleImpl.IMPL_LOOKUP.in(callerClass);
if (bootstrapMethod == null) {
// If there is no bootstrap method, throw IncompatibleClassChangeError.
// This is a valid generic error type for resolution (JLS 12.3.3).
throw new IncompatibleClassChangeError
- ("Class "+caller.getName()+" has not declared a bootstrap method for invokedynamic");
+ ("Class "+callerClass.getName()+" has not declared a bootstrap method for invokedynamic");
}
CallSite site;
try {
Object binding;
- if (false) // switch when invokeGeneric works
- binding = bootstrapMethod.invokeGeneric(caller, name, type);
- else
- binding = bootstrapMethod.invokeVarargs(new Object[]{ caller, name, type });
+ if (info == null) {
+ if (false) // switch when invokeGeneric works
+ binding = bootstrapMethod.invokeGeneric(caller, name, type);
+ else
+ binding = bootstrapMethod.invokeVarargs(new Object[]{ caller, name, type });
+ } else {
+ info = maybeReBox(info);
+ if (false) // switch when invokeGeneric works
+ binding = bootstrapMethod.invokeGeneric(caller, name, type, info);
+ else
+ binding = bootstrapMethod.invokeVarargs(new Object[]{ caller, name, type, info });
+ }
//System.out.println("BSM for "+name+type+" => "+binding);
if (binding instanceof CallSite) {
site = (CallSite) binding;
- } else if (binding instanceof MethodHandleProvider) {
- MethodHandle target = ((MethodHandleProvider) binding).asMethodHandle();
+ } else if (binding instanceof MethodHandle) {
+ // Transitional!
+ MethodHandle target = (MethodHandle) binding;
site = new ConstantCallSite(target);
} else {
throw new ClassCastException("bootstrap method failed to produce a MethodHandle or CallSite");
}
- PRIVATE_INITIALIZE_CALL_SITE.<void>invokeExact(site, name, type,
- callerMethod, callerBCI);
+ PRIVATE_INITIALIZE_CALL_SITE.invokeExact(site, name, type,
+ callerMethod, callerBCI);
assert(site.getTarget() != null);
assert(site.getTarget().type().equals(type));
} catch (Throwable ex) {
@@ -79,6 +93,24 @@
return site;
}
+ private static Object maybeReBox(Object x) {
+ if (x instanceof Integer) {
+ int xi = (int) x;
+ if (xi == (byte) xi)
+ x = xi; // must rebox; see JLS 5.1.7
+ return x;
+ } else if (x instanceof Object[]) {
+ Object[] xa = (Object[]) x;
+ for (int i = 0; i < xa.length; i++) {
+ if (xa[i] instanceof Integer)
+ xa[i] = maybeReBox(xa[i]);
+ }
+ return xa;
+ } else {
+ return x;
+ }
+ }
+
// This method is private in CallSite because it touches private fields in CallSite.
// These private fields (vmmethod, vmindex) are specific to the JVM.
private static final MethodHandle PRIVATE_INITIALIZE_CALL_SITE;
--- a/jdk/src/share/classes/sun/dyn/FilterGeneric.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/FilterGeneric.java Tue Dec 21 18:45:45 2010 -0800
@@ -115,7 +115,7 @@
static MethodHandle make(Kind kind, int pos, MethodHandle filter, MethodHandle target) {
FilterGeneric fgen = of(kind, pos, filter.type(), target.type());
- return fgen.makeInstance(kind, pos, filter, target).asMethodHandle();
+ return fgen.makeInstance(kind, pos, filter, target);
}
/** Return the adapter information for this target and filter type. */
@@ -225,13 +225,13 @@
* The invoker is kept separate from the target because it can be
* generated once per type erasure family, and reused across adapters.
*/
- static abstract class Adapter extends JavaMethodHandle {
+ static abstract class Adapter extends BoundMethodHandle {
protected final MethodHandle filter; // transforms one or more arguments
protected final MethodHandle target; // ultimate target
@Override
public String toString() {
- return target.toString();
+ return MethodHandleImpl.addTypeString(target, this);
}
protected boolean isPrototype() { return target == null; }
@@ -246,7 +246,7 @@
protected Adapter(MethodHandle entryPoint,
MethodHandle filter, MethodHandle target) {
- super(entryPoint);
+ super(Access.TOKEN, entryPoint);
this.filter = filter;
this.target = target;
}
@@ -303,7 +303,7 @@
protected Object invoke_C0(Object a0) { return target.invokeExact(filter.invokeExact(a0)); }
protected Object invoke_C1(Object a0) { return target.invokeExact(a0, filter.invokeExact()); }
protected Object invoke_Y0(Object a0) { Object[] av = { a0 };
- filter.<void>invokeExact(av); return target.invokeExact(av[0]); }
+ filter.invokeExact(av); return target.invokeExact(av[0]); }
}
static class F2X extends Adapter {
protected F2X(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
@@ -320,7 +320,7 @@
protected Object invoke_C1(Object a0, Object a1) { return target.invokeExact(a0, filter.invokeExact(a1)); }
protected Object invoke_C2(Object a0, Object a1) { return target.invokeExact(a0, a1, filter.invokeExact()); }
protected Object invoke_Y0(Object a0, Object a1) { Object[] av = { a0, a1 };
- filter.<void>invokeExact(av); return target.invokeExact(av[0], av[1]); }
+ filter.invokeExact(av); return target.invokeExact(av[0], av[1]); }
}
// */
@@ -337,7 +337,7 @@
return target.invokeExact(filter.invokeExact()); }
static final Object[] NO_ARGS = { };
protected Object invoke_Y0() throws Throwable {
- filter.<void>invokeExact(NO_ARGS); // make the flyby
+ filter.invokeExact(NO_ARGS); // make the flyby
return target.invokeExact(); }
}
@@ -375,7 +375,7 @@
" return target.invokeExact(@av@, filter.invokeExact()); }",
" protected Object invoke_Y0(@Tvav@) throws Throwable {",
" Object[] av = { @av@ };",
- " filter.<void>invokeExact(av); // make the flyby",
+ " filter.invokeExact(av); // make the flyby",
" return target.invokeExact(@av[i]@); }",
" }",
} };
@@ -518,7 +518,7 @@
return target.invokeExact(a0, filter.invokeExact()); }
protected Object invoke_Y0(Object a0) throws Throwable {
Object[] av = { a0 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0]); }
}
static class F2 extends Adapter {
@@ -548,7 +548,7 @@
return target.invokeExact(a0, a1, filter.invokeExact()); }
protected Object invoke_Y0(Object a0, Object a1) throws Throwable {
Object[] av = { a0, a1 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1]); }
}
static class F3 extends Adapter {
@@ -585,7 +585,7 @@
return target.invokeExact(a0, a1, a2, filter.invokeExact()); }
protected Object invoke_Y0(Object a0, Object a1, Object a2) throws Throwable {
Object[] av = { a0, a1, a2 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2]); }
}
static class F4 extends Adapter {
@@ -629,7 +629,7 @@
return target.invokeExact(a0, a1, a2, a3, filter.invokeExact()); }
protected Object invoke_Y0(Object a0, Object a1, Object a2, Object a3) throws Throwable {
Object[] av = { a0, a1, a2, a3 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3]); }
}
static class F5 extends Adapter {
@@ -698,7 +698,7 @@
protected Object invoke_Y0(Object a0, Object a1, Object a2, Object a3,
Object a4) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4]); }
}
static class F6 extends Adapter {
@@ -777,7 +777,7 @@
protected Object invoke_Y0(Object a0, Object a1, Object a2, Object a3,
Object a4, Object a5) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5]); }
}
static class F7 extends Adapter {
@@ -866,7 +866,7 @@
protected Object invoke_Y0(Object a0, Object a1, Object a2, Object a3,
Object a4, Object a5, Object a6) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5, a6 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5], av[6]); }
}
static class F8 extends Adapter {
@@ -965,7 +965,7 @@
protected Object invoke_Y0(Object a0, Object a1, Object a2, Object a3,
Object a4, Object a5, Object a6, Object a7) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5, a6, a7 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5], av[6], av[7]); }
}
static class F9 extends Adapter {
@@ -1104,7 +1104,7 @@
Object a4, Object a5, Object a6, Object a7,
Object a8) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5, a6, a7, a8 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5], av[6], av[7], av[8]); }
}
static class F10 extends Adapter {
@@ -1256,7 +1256,7 @@
Object a4, Object a5, Object a6, Object a7,
Object a8, Object a9) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5, a6, a7, a8, a9 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5], av[6], av[7], av[8], av[9]); }
}
static class F11 extends Adapter {
@@ -1442,7 +1442,7 @@
Object a4, Object a5, Object a6, Object a7,
Object a8, Object a9, Object a10) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5], av[6], av[7], av[8], av[9], av[10]); }
}
static class F12 extends Adapter {
@@ -1644,7 +1644,7 @@
Object a4, Object a5, Object a6, Object a7,
Object a8, Object a9, Object a10, Object a11) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5], av[6], av[7], av[8], av[9], av[10], av[11]); }
}
static class F13 extends Adapter {
@@ -1904,7 +1904,7 @@
Object a8, Object a9, Object a10, Object a11,
Object a12) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5], av[6], av[7], av[8], av[9], av[10], av[11], av[12]); }
}
static class F14 extends Adapter {
@@ -2183,7 +2183,7 @@
Object a8, Object a9, Object a10, Object a11,
Object a12, Object a13) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5], av[6], av[7], av[8], av[9], av[10], av[11], av[12], av[13]); }
}
static class F15 extends Adapter {
@@ -2481,7 +2481,7 @@
Object a8, Object a9, Object a10, Object a11,
Object a12, Object a13, Object a14) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5], av[6], av[7], av[8], av[9], av[10], av[11], av[12], av[13], av[14]); }
}
static class F16 extends Adapter {
@@ -2798,7 +2798,7 @@
Object a8, Object a9, Object a10, Object a11,
Object a12, Object a13, Object a14, Object a15) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5], av[6], av[7], av[8], av[9], av[10], av[11], av[12], av[13], av[14], av[15]); }
}
static class F17 extends Adapter {
@@ -3188,7 +3188,7 @@
Object a12, Object a13, Object a14, Object a15,
Object a16) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5], av[6], av[7], av[8], av[9], av[10], av[11], av[12], av[13], av[14], av[15], av[16]); }
}
static class F18 extends Adapter {
@@ -3600,7 +3600,7 @@
Object a12, Object a13, Object a14, Object a15,
Object a16, Object a17) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5], av[6], av[7], av[8], av[9], av[10], av[11], av[12], av[13], av[14], av[15], av[16], av[17]); }
}
static class F19 extends Adapter {
@@ -4034,7 +4034,7 @@
Object a12, Object a13, Object a14, Object a15,
Object a16, Object a17, Object a18) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5], av[6], av[7], av[8], av[9], av[10], av[11], av[12], av[13], av[14], av[15], av[16], av[17], av[18]); }
}
static class F20 extends Adapter {
@@ -4490,7 +4490,7 @@
Object a12, Object a13, Object a14, Object a15,
Object a16, Object a17, Object a18, Object a19) throws Throwable {
Object[] av = { a0, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19 };
- filter.<void>invokeExact(av); // make the flyby
+ filter.invokeExact(av); // make the flyby
return target.invokeExact(av[0], av[1], av[2], av[3], av[4], av[5], av[6], av[7], av[8], av[9], av[10], av[11], av[12], av[13], av[14], av[15], av[16], av[17], av[18], av[19]); }
}
}
--- a/jdk/src/share/classes/sun/dyn/FilterOneArgument.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/FilterOneArgument.java Tue Dec 21 18:45:45 2010 -0800
@@ -36,7 +36,7 @@
* final method type is the responsibility of a JVM-level adapter.
* @author jrose
*/
-public class FilterOneArgument extends JavaMethodHandle {
+public class FilterOneArgument extends BoundMethodHandle {
protected final MethodHandle filter; // Object -> Object
protected final MethodHandle target; // Object -> Object
@@ -62,7 +62,7 @@
}
protected FilterOneArgument(MethodHandle filter, MethodHandle target) {
- super(INVOKE);
+ super(Access.TOKEN, INVOKE);
this.filter = filter;
this.target = target;
}
--- a/jdk/src/share/classes/sun/dyn/FromGeneric.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/FromGeneric.java Tue Dec 21 18:45:45 2010 -0800
@@ -241,7 +241,7 @@
* The invoker is kept separate from the target because it can be
* generated once per type erasure family, and reused across adapters.
*/
- static abstract class Adapter extends JavaMethodHandle {
+ static abstract class Adapter extends BoundMethodHandle {
/*
* class X<<R,int N>> extends Adapter {
* (MH, Object**N)=>raw(R) invoker;
@@ -256,7 +256,7 @@
@Override
public String toString() {
- return target.toString();
+ return MethodHandleImpl.addTypeString(target, this);
}
protected boolean isPrototype() { return target == null; }
@@ -271,7 +271,7 @@
protected Adapter(MethodHandle entryPoint,
MethodHandle invoker, MethodHandle convert, MethodHandle target) {
- super(entryPoint);
+ super(Access.TOKEN, entryPoint);
this.invoker = invoker;
this.convert = convert;
this.target = target;
@@ -283,11 +283,11 @@
// { return new ThisType(entryPoint, convert, target); }
/// Conversions on the value returned from the target.
- protected Object convert_L(Object result) throws Throwable { return convert.<Object>invokeExact(result); }
- protected Object convert_I(int result) throws Throwable { return convert.<Object>invokeExact(result); }
- protected Object convert_J(long result) throws Throwable { return convert.<Object>invokeExact(result); }
- protected Object convert_F(float result) throws Throwable { return convert.<Object>invokeExact(result); }
- protected Object convert_D(double result) throws Throwable { return convert.<Object>invokeExact(result); }
+ protected Object convert_L(Object result) throws Throwable { return convert.invokeExact(result); }
+ protected Object convert_I(int result) throws Throwable { return convert.invokeExact(result); }
+ protected Object convert_J(long result) throws Throwable { return convert.invokeExact(result); }
+ protected Object convert_F(float result) throws Throwable { return convert.invokeExact(result); }
+ protected Object convert_D(double result) throws Throwable { return convert.invokeExact(result); }
static private final String CLASS_PREFIX; // "sun.dyn.FromGeneric$"
static {
@@ -316,11 +316,11 @@
{ super(e, i, c, t); }
protected xA2 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)
{ return new xA2(e, i, c, t); }
- protected Object invoke_L2(Object a0, Object a1) throws Throwable { return convert_L(invoker.<Object>invokeExact(target, a0, a1)); }
- protected Object invoke_I2(Object a0, Object a1) throws Throwable { return convert_I(invoker.<int >invokeExact(target, a0, a1)); }
- protected Object invoke_J2(Object a0, Object a1) throws Throwable { return convert_J(invoker.<long >invokeExact(target, a0, a1)); }
- protected Object invoke_F2(Object a0, Object a1) throws Throwable { return convert_F(invoker.<float >invokeExact(target, a0, a1)); }
- protected Object invoke_D2(Object a0, Object a1) throws Throwable { return convert_D(invoker.<double>invokeExact(target, a0, a1)); }
+ protected Object invoke_L2(Object a0, Object a1) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1)); }
+ protected Object invoke_I2(Object a0, Object a1) throws Throwable { return convert_I((int) invoker.invokeExact(target, a0, a1)); }
+ protected Object invoke_J2(Object a0, Object a1) throws Throwable { return convert_J((long) invoker.invokeExact(target, a0, a1)); }
+ protected Object invoke_F2(Object a0, Object a1) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1)); }
+ protected Object invoke_D2(Object a0, Object a1) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1)); }
}
// */
@@ -329,7 +329,8 @@
//{{{
import java.util.*;
class genclasses {
- static String[] TYPES = { "Object", "int ", "long ", "float ", "double" };
+ static String[] TYPES = { "Object", "int ", "long ", "float ", "double" };
+ static String[] WRAPS = { " ", "(Integer)", "(Long) ", "(Float) ", "(Double) " };
static String[] TCHARS = { "L", "I", "J", "F", "D", "A" };
static String[][] TEMPLATES = { {
"@for@ arity=0..10 rcat<=4 nrefs<=99 nints=0 nlongs=0",
@@ -341,13 +342,13 @@
" protected @cat@ makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)",
" { return new @cat@(e, i, c, t); }",
" //@each-R@",
- " protected Object invoke_@catN@(@Tvav@) throws Throwable { return convert_@Rc@(invoker.<@R@>invokeExact(target@av@)); }",
+ " protected Object invoke_@catN@(@Tvav@) throws Throwable { return convert_@Rc@((@R@)@W@invoker.invokeExact(target@av@)); }",
" //@end-R@",
" }",
} };
static final String NEWLINE_INDENT = "\n ";
enum VAR {
- cat, catN, R, Rc, av, Tvav, Ovav;
+ cat, catN, R, Rc, W, av, Tvav, Ovav;
public final String pattern = "@"+toString().replace('_','.')+"@";
public String binding;
static void makeBindings(boolean topLevel, int rcat, int nrefs, int nints, int nlongs) {
@@ -357,6 +358,7 @@
VAR.catN.binding = catstr(rcat, nrefs, nints, nlongs);
VAR.R.binding = TYPES[rcat];
VAR.Rc.binding = TCHARS[rcat];
+ VAR.W.binding = WRAPS[rcat];
String[] Tv = new String[nargs];
String[] av = new String[nargs];
String[] Tvav = new String[nargs];
@@ -497,11 +499,11 @@
{ super(e, i, c, t); }
protected A0 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)
{ return new A0(e, i, c, t); }
- protected Object invoke_L0() throws Throwable { return convert_L(invoker.<Object>invokeExact(target)); }
- protected Object invoke_I0() throws Throwable { return convert_I(invoker.<int >invokeExact(target)); }
- protected Object invoke_J0() throws Throwable { return convert_J(invoker.<long >invokeExact(target)); }
- protected Object invoke_F0() throws Throwable { return convert_F(invoker.<float >invokeExact(target)); }
- protected Object invoke_D0() throws Throwable { return convert_D(invoker.<double>invokeExact(target)); }
+ protected Object invoke_L0() throws Throwable { return convert_L((Object)invoker.invokeExact(target)); }
+ protected Object invoke_I0() throws Throwable { return convert_I((int) invoker.invokeExact(target)); }
+ protected Object invoke_J0() throws Throwable { return convert_J((long) invoker.invokeExact(target)); }
+ protected Object invoke_F0() throws Throwable { return convert_F((float) invoker.invokeExact(target)); }
+ protected Object invoke_D0() throws Throwable { return convert_D((double)invoker.invokeExact(target)); }
}
static class A1 extends Adapter {
protected A1(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
@@ -509,11 +511,11 @@
{ super(e, i, c, t); }
protected A1 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)
{ return new A1(e, i, c, t); }
- protected Object invoke_L1(Object a0) throws Throwable { return convert_L(invoker.<Object>invokeExact(target, a0)); }
- protected Object invoke_I1(Object a0) throws Throwable { return convert_I(invoker.<int >invokeExact(target, a0)); }
- protected Object invoke_J1(Object a0) throws Throwable { return convert_J(invoker.<long >invokeExact(target, a0)); }
- protected Object invoke_F1(Object a0) throws Throwable { return convert_F(invoker.<float >invokeExact(target, a0)); }
- protected Object invoke_D1(Object a0) throws Throwable { return convert_D(invoker.<double>invokeExact(target, a0)); }
+ protected Object invoke_L1(Object a0) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0)); }
+ protected Object invoke_I1(Object a0) throws Throwable { return convert_I((int) invoker.invokeExact(target, a0)); }
+ protected Object invoke_J1(Object a0) throws Throwable { return convert_J((long) invoker.invokeExact(target, a0)); }
+ protected Object invoke_F1(Object a0) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0)); }
+ protected Object invoke_D1(Object a0) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0)); }
}
static class A2 extends Adapter {
protected A2(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
@@ -521,11 +523,11 @@
{ super(e, i, c, t); }
protected A2 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)
{ return new A2(e, i, c, t); }
- protected Object invoke_L2(Object a0, Object a1) throws Throwable { return convert_L(invoker.<Object>invokeExact(target, a0, a1)); }
- protected Object invoke_I2(Object a0, Object a1) throws Throwable { return convert_I(invoker.<int >invokeExact(target, a0, a1)); }
- protected Object invoke_J2(Object a0, Object a1) throws Throwable { return convert_J(invoker.<long >invokeExact(target, a0, a1)); }
- protected Object invoke_F2(Object a0, Object a1) throws Throwable { return convert_F(invoker.<float >invokeExact(target, a0, a1)); }
- protected Object invoke_D2(Object a0, Object a1) throws Throwable { return convert_D(invoker.<double>invokeExact(target, a0, a1)); }
+ protected Object invoke_L2(Object a0, Object a1) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1)); }
+ protected Object invoke_I2(Object a0, Object a1) throws Throwable { return convert_I((int) invoker.invokeExact(target, a0, a1)); }
+ protected Object invoke_J2(Object a0, Object a1) throws Throwable { return convert_J((long) invoker.invokeExact(target, a0, a1)); }
+ protected Object invoke_F2(Object a0, Object a1) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1)); }
+ protected Object invoke_D2(Object a0, Object a1) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1)); }
}
static class A3 extends Adapter {
protected A3(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
@@ -533,11 +535,11 @@
{ super(e, i, c, t); }
protected A3 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)
{ return new A3(e, i, c, t); }
- protected Object invoke_L3(Object a0, Object a1, Object a2) throws Throwable { return convert_L(invoker.<Object>invokeExact(target, a0, a1, a2)); }
- protected Object invoke_I3(Object a0, Object a1, Object a2) throws Throwable { return convert_I(invoker.<int >invokeExact(target, a0, a1, a2)); }
- protected Object invoke_J3(Object a0, Object a1, Object a2) throws Throwable { return convert_J(invoker.<long >invokeExact(target, a0, a1, a2)); }
- protected Object invoke_F3(Object a0, Object a1, Object a2) throws Throwable { return convert_F(invoker.<float >invokeExact(target, a0, a1, a2)); }
- protected Object invoke_D3(Object a0, Object a1, Object a2) throws Throwable { return convert_D(invoker.<double>invokeExact(target, a0, a1, a2)); }
+ protected Object invoke_L3(Object a0, Object a1, Object a2) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2)); }
+ protected Object invoke_I3(Object a0, Object a1, Object a2) throws Throwable { return convert_I((int) invoker.invokeExact(target, a0, a1, a2)); }
+ protected Object invoke_J3(Object a0, Object a1, Object a2) throws Throwable { return convert_J((long) invoker.invokeExact(target, a0, a1, a2)); }
+ protected Object invoke_F3(Object a0, Object a1, Object a2) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2)); }
+ protected Object invoke_D3(Object a0, Object a1, Object a2) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2)); }
}
static class A4 extends Adapter {
protected A4(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
@@ -545,11 +547,11 @@
{ super(e, i, c, t); }
protected A4 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)
{ return new A4(e, i, c, t); }
- protected Object invoke_L4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_L(invoker.<Object>invokeExact(target, a0, a1, a2, a3)); }
- protected Object invoke_I4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_I(invoker.<int >invokeExact(target, a0, a1, a2, a3)); }
- protected Object invoke_J4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_J(invoker.<long >invokeExact(target, a0, a1, a2, a3)); }
- protected Object invoke_F4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_F(invoker.<float >invokeExact(target, a0, a1, a2, a3)); }
- protected Object invoke_D4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_D(invoker.<double>invokeExact(target, a0, a1, a2, a3)); }
+ protected Object invoke_L4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2, a3)); }
+ protected Object invoke_I4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_I((int) invoker.invokeExact(target, a0, a1, a2, a3)); }
+ protected Object invoke_J4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_J((long) invoker.invokeExact(target, a0, a1, a2, a3)); }
+ protected Object invoke_F4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2, a3)); }
+ protected Object invoke_D4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2, a3)); }
}
static class A5 extends Adapter {
protected A5(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
@@ -557,11 +559,11 @@
{ super(e, i, c, t); }
protected A5 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)
{ return new A5(e, i, c, t); }
- protected Object invoke_L5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_L(invoker.<Object>invokeExact(target, a0, a1, a2, a3, a4)); }
- protected Object invoke_I5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_I(invoker.<int >invokeExact(target, a0, a1, a2, a3, a4)); }
- protected Object invoke_J5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_J(invoker.<long >invokeExact(target, a0, a1, a2, a3, a4)); }
- protected Object invoke_F5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_F(invoker.<float >invokeExact(target, a0, a1, a2, a3, a4)); }
- protected Object invoke_D5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_D(invoker.<double>invokeExact(target, a0, a1, a2, a3, a4)); }
+ protected Object invoke_L5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2, a3, a4)); }
+ protected Object invoke_I5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_I((int) invoker.invokeExact(target, a0, a1, a2, a3, a4)); }
+ protected Object invoke_J5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_J((long) invoker.invokeExact(target, a0, a1, a2, a3, a4)); }
+ protected Object invoke_F5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2, a3, a4)); }
+ protected Object invoke_D5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2, a3, a4)); }
}
static class A6 extends Adapter {
protected A6(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
@@ -569,11 +571,11 @@
{ super(e, i, c, t); }
protected A6 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)
{ return new A6(e, i, c, t); }
- protected Object invoke_L6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_L(invoker.<Object>invokeExact(target, a0, a1, a2, a3, a4, a5)); }
- protected Object invoke_I6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_I(invoker.<int >invokeExact(target, a0, a1, a2, a3, a4, a5)); }
- protected Object invoke_J6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_J(invoker.<long >invokeExact(target, a0, a1, a2, a3, a4, a5)); }
- protected Object invoke_F6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_F(invoker.<float >invokeExact(target, a0, a1, a2, a3, a4, a5)); }
- protected Object invoke_D6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_D(invoker.<double>invokeExact(target, a0, a1, a2, a3, a4, a5)); }
+ protected Object invoke_L6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5)); }
+ protected Object invoke_I6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_I((int) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5)); }
+ protected Object invoke_J6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_J((long) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5)); }
+ protected Object invoke_F6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5)); }
+ protected Object invoke_D6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5)); }
}
static class A7 extends Adapter {
protected A7(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
@@ -581,11 +583,11 @@
{ super(e, i, c, t); }
protected A7 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)
{ return new A7(e, i, c, t); }
- protected Object invoke_L7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_L(invoker.<Object>invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }
- protected Object invoke_I7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_I(invoker.<int >invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }
- protected Object invoke_J7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_J(invoker.<long >invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }
- protected Object invoke_F7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_F(invoker.<float >invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }
- protected Object invoke_D7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_D(invoker.<double>invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }
+ protected Object invoke_L7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }
+ protected Object invoke_I7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_I((int) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }
+ protected Object invoke_J7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_J((long) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }
+ protected Object invoke_F7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }
+ protected Object invoke_D7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6)); }
}
static class A8 extends Adapter {
protected A8(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
@@ -593,11 +595,11 @@
{ super(e, i, c, t); }
protected A8 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)
{ return new A8(e, i, c, t); }
- protected Object invoke_L8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_L(invoker.<Object>invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }
- protected Object invoke_I8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_I(invoker.<int >invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }
- protected Object invoke_J8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_J(invoker.<long >invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }
- protected Object invoke_F8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_F(invoker.<float >invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }
- protected Object invoke_D8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_D(invoker.<double>invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }
+ protected Object invoke_L8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }
+ protected Object invoke_I8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_I((int) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }
+ protected Object invoke_J8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_J((long) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }
+ protected Object invoke_F8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }
+ protected Object invoke_D8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7)); }
}
static class A9 extends Adapter {
protected A9(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
@@ -605,11 +607,11 @@
{ super(e, i, c, t); }
protected A9 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)
{ return new A9(e, i, c, t); }
- protected Object invoke_L9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_L(invoker.<Object>invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }
- protected Object invoke_I9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_I(invoker.<int >invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }
- protected Object invoke_J9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_J(invoker.<long >invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }
- protected Object invoke_F9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_F(invoker.<float >invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }
- protected Object invoke_D9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_D(invoker.<double>invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }
+ protected Object invoke_L9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }
+ protected Object invoke_I9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_I((int) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }
+ protected Object invoke_J9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_J((long) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }
+ protected Object invoke_F9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }
+ protected Object invoke_D9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8)); }
}
static class A10 extends Adapter {
protected A10(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
@@ -617,10 +619,10 @@
{ super(e, i, c, t); }
protected A10 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t)
{ return new A10(e, i, c, t); }
- protected Object invoke_L10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_L(invoker.<Object>invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }
- protected Object invoke_I10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_I(invoker.<int >invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }
- protected Object invoke_J10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_J(invoker.<long >invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }
- protected Object invoke_F10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_F(invoker.<float >invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }
- protected Object invoke_D10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_D(invoker.<double>invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }
+ protected Object invoke_L10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_L((Object)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }
+ protected Object invoke_I10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_I((int) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }
+ protected Object invoke_J10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_J((long) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }
+ protected Object invoke_F10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_F((float) invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }
+ protected Object invoke_D10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return convert_D((double)invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9)); }
}
}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/share/classes/sun/dyn/InvokeGeneric.java Tue Dec 21 18:45:45 2010 -0800
@@ -0,0 +1,160 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package sun.dyn;
+
+import java.dyn.*;
+import java.lang.reflect.*;
+import sun.dyn.util.*;
+
+/**
+ * Adapters which manage MethodHanndle.invokeGeneric calls.
+ * The JVM calls one of these when the exact type match fails.
+ * @author jrose
+ */
+class InvokeGeneric {
+ // erased type for the call, which originates from an invokeGeneric site
+ private final MethodType erasedCallerType;
+ // an invoker of type (MT, MH; A...) -> R
+ private final MethodHandle initialInvoker;
+
+ /** Compute and cache information for this adapter, so that it can
+ * call out to targets of the erasure-family of the given erased type.
+ */
+ private InvokeGeneric(MethodType erasedCallerType) throws NoAccessException {
+ this.erasedCallerType = erasedCallerType;
+ this.initialInvoker = makeInitialInvoker();
+ assert initialInvoker.type().equals(erasedCallerType
+ .insertParameterTypes(0, MethodType.class, MethodHandle.class))
+ : initialInvoker.type();
+ }
+
+ private static MethodHandles.Lookup lookup() {
+ return MethodHandleImpl.IMPL_LOOKUP;
+ }
+
+ /** Return the adapter information for this type's erasure. */
+ static MethodHandle genericInvokerOf(MethodType type) {
+ MethodTypeImpl form = MethodTypeImpl.of(type);
+ MethodHandle genericInvoker = form.genericInvoker;
+ if (genericInvoker == null) {
+ try {
+ InvokeGeneric gen = new InvokeGeneric(form.erasedType());
+ form.genericInvoker = genericInvoker = gen.initialInvoker;
+ } catch (NoAccessException ex) {
+ throw new RuntimeException(ex);
+ }
+ }
+ return genericInvoker;
+ }
+
+ private MethodHandle makeInitialInvoker() throws NoAccessException {
+ // postDispatch = #(MH'; MT, MH; A...){MH'(MT, MH; A)}
+ MethodHandle postDispatch = makePostDispatchInvoker();
+ MethodHandle invoker;
+ if (returnConversionPossible()) {
+ invoker = MethodHandles.foldArguments(postDispatch,
+ dispatcher("dispatchWithConversion"));
+ } else {
+ invoker = MethodHandles.foldArguments(postDispatch, dispatcher("dispatch"));
+ }
+ return invoker;
+ }
+
+ private static final Class<?>[] EXTRA_ARGS = { MethodType.class, MethodHandle.class };
+ private MethodHandle makePostDispatchInvoker() {
+ // Take (MH'; MT, MH; A...) and run MH'(MT, MH; A...).
+ MethodType invokerType = erasedCallerType.insertParameterTypes(0, EXTRA_ARGS);
+ return MethodHandles.exactInvoker(invokerType);
+ }
+ private MethodHandle dropDispatchArguments(MethodHandle targetInvoker) {
+ assert(targetInvoker.type().parameterType(0) == MethodHandle.class);
+ return MethodHandles.dropArguments(targetInvoker, 1, EXTRA_ARGS);
+ }
+
+ private MethodHandle dispatcher(String dispatchName) throws NoAccessException {
+ return lookup().bind(this, dispatchName,
+ MethodType.methodType(MethodHandle.class,
+ MethodType.class, MethodHandle.class));
+ }
+
+ static final boolean USE_AS_TYPE_PATH = true;
+
+ /** Return a method handle to invoke on the callerType, target, and remaining arguments.
+ * The method handle must finish the call.
+ * This is the first look at the caller type and target.
+ */
+ private MethodHandle dispatch(MethodType callerType, MethodHandle target) {
+ MethodType targetType = target.type();
+ if (USE_AS_TYPE_PATH || target instanceof AdapterMethodHandle.WithTypeHandler) {
+ MethodHandle newTarget = target.asType(callerType);
+ targetType = callerType;
+ Invokers invokers = MethodTypeImpl.invokers(Access.TOKEN, targetType);
+ MethodHandle invoker = invokers.erasedInvokerWithDrops;
+ if (invoker == null) {
+ invokers.erasedInvokerWithDrops = invoker =
+ dropDispatchArguments(invokers.erasedInvoker());
+ }
+ return invoker.bindTo(newTarget);
+ }
+ throw new RuntimeException("NYI");
+ }
+
+ private MethodHandle dispatchWithConversion(MethodType callerType, MethodHandle target) {
+ MethodHandle finisher = dispatch(callerType, target);
+ if (returnConversionNeeded(callerType, target))
+ finisher = addReturnConversion(finisher, callerType.returnType()); //FIXME: slow
+ return finisher;
+ }
+
+ private boolean returnConversionPossible() {
+ Class<?> needType = erasedCallerType.returnType();
+ return !needType.isPrimitive();
+ }
+ private boolean returnConversionNeeded(MethodType callerType, MethodHandle target) {
+ Class<?> needType = callerType.returnType();
+ if (needType == erasedCallerType.returnType())
+ return false; // no conversions possible, since must be primitive or Object
+ Class<?> haveType = target.type().returnType();
+ if (VerifyType.isNullConversion(haveType, needType))
+ return false;
+ return true;
+ }
+ private MethodHandle addReturnConversion(MethodHandle target, Class<?> type) {
+ if (true) throw new RuntimeException("NYI");
+ // FIXME: This is slow because it creates a closure node on every call that requires a return cast.
+ MethodType targetType = target.type();
+ MethodHandle caster = ValueConversions.identity(type);
+ caster = caster.asType(MethodType.methodType(type, targetType.returnType()));
+ // Drop irrelevant arguments, because we only care about the return value:
+ caster = MethodHandles.dropArguments(caster, 1, targetType.parameterList());
+ MethodHandle result = MethodHandles.foldArguments(caster, target);
+ return result.asType(target.type());
+ }
+
+ public String toString() {
+ return "InvokeGeneric"+erasedCallerType;
+ }
+}
--- a/jdk/src/share/classes/sun/dyn/Invokers.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/Invokers.java Tue Dec 21 18:45:45 2010 -0800
@@ -26,6 +26,7 @@
package sun.dyn;
import java.dyn.*;
+import sun.dyn.empty.Empty;
/**
* Construction and caching of often-used invokers.
@@ -38,12 +39,19 @@
// exact invoker for the outgoing call
private /*lazy*/ MethodHandle exactInvoker;
+ // erased (partially untyped but with primitives) invoker for the outgoing call
+ private /*lazy*/ MethodHandle erasedInvoker;
+ /*lazy*/ MethodHandle erasedInvokerWithDrops; // for InvokeGeneric
+
// generic (untyped) invoker for the outgoing call
private /*lazy*/ MethodHandle genericInvoker;
// generic (untyped) invoker for the outgoing call; accepts a single Object[]
private final /*lazy*/ MethodHandle[] varargsInvokers;
+ // invoker for an unbound callsite
+ private /*lazy*/ MethodHandle uninitializedCallSite;
+
/** Compute and cache information common to all collecting adapters
* that implement members of the erasure-family of the given erased type.
*/
@@ -80,6 +88,19 @@
return invoker;
}
+ public MethodHandle erasedInvoker() {
+ MethodHandle invoker1 = exactInvoker();
+ MethodHandle invoker = erasedInvoker;
+ if (invoker != null) return invoker;
+ MethodType erasedType = targetType.erase();
+ if (erasedType == targetType.generic())
+ invoker = genericInvoker();
+ else
+ invoker = MethodHandles.convertArguments(invoker1, invokerType(erasedType));
+ erasedInvoker = invoker;
+ return invoker;
+ }
+
public MethodHandle varargsInvoker(int objectArgCount) {
MethodHandle vaInvoker = varargsInvokers[objectArgCount];
if (vaInvoker != null) return vaInvoker;
@@ -90,6 +111,35 @@
return vaInvoker;
}
+ private static MethodHandle THROW_UCS = null;
+
+ public MethodHandle uninitializedCallSite() {
+ MethodHandle invoker = uninitializedCallSite;
+ if (invoker != null) return invoker;
+ if (targetType.parameterCount() > 0) {
+ MethodType type0 = targetType.dropParameterTypes(0, targetType.parameterCount());
+ Invokers invokers0 = MethodTypeImpl.invokers(Access.TOKEN, type0);
+ invoker = MethodHandles.dropArguments(invokers0.uninitializedCallSite(),
+ 0, targetType.parameterList());
+ assert(invoker.type().equals(targetType));
+ uninitializedCallSite = invoker;
+ return invoker;
+ }
+ if (THROW_UCS == null) {
+ try {
+ THROW_UCS = MethodHandleImpl.IMPL_LOOKUP
+ .findStatic(CallSite.class, "uninitializedCallSite",
+ MethodType.methodType(Empty.class));
+ } catch (NoAccessException ex) {
+ throw new RuntimeException(ex);
+ }
+ }
+ invoker = AdapterMethodHandle.makeRetypeRaw(Access.TOKEN, targetType, THROW_UCS);
+ assert(invoker.type().equals(targetType));
+ uninitializedCallSite = invoker;
+ return invoker;
+ }
+
public String toString() {
return "Invokers"+targetType;
}
--- a/jdk/src/share/classes/sun/dyn/JavaMethodHandle.java Tue Dec 21 15:27:55 2010 -0800
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,172 +0,0 @@
-/*
- * Copyright (c) 2008, 2009, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-package sun.dyn;
-
-import java.dyn.*;
-import sun.dyn.Access;
-
-/**
- * A Java method handle is a deprecated proposal for extending
- * the basic method handle type with additional
- * programmer defined methods and fields.
- * Its behavior as a method handle is determined at instance creation time,
- * by providing the new instance with an "entry point" method handle
- * to handle calls. This entry point must accept a leading argument
- * whose type is the Java method handle itself or a supertype, and the
- * entry point is always called with the Java method handle itself as
- * the first argument. This is similar to ordinary virtual methods, which also
- * accept the receiver object {@code this} as an implicit leading argument.
- * The {@code MethodType} of the Java method handle is the same as that
- * of the entry point method handle, with the leading parameter type
- * omitted.
- * <p>
- * Here is an example of usage, creating a hybrid object/functional datum:
- * <p><blockquote><pre>
- * class Greeter extends JavaMethodHandle {
- * private String greeting = "hello";
- * public void setGreeting(String s) { greeting = s; }
- * public void run() { System.out.println(greeting+", "+greetee); }
- * private final String greetee;
- * Greeter(String greetee) {
- * super(RUN); // alternatively, super("run")
- * this.greetee = greetee;
- * }
- * // the entry point function is computed once:
- * private static final MethodHandle RUN
- * = MethodHandles.lookup().findVirtual(Greeter.class, "run",
- * MethodType.make(void.class));
- * }
- * // class Main { public static void main(String... av) { ...
- * Greeter greeter = new Greeter("world");
- * greeter.run(); // prints "hello, world"
- * // Statically typed method handle invocation (most direct):
- * MethodHandle mh = greeter;
- * mh.<void>invokeExact(); // also prints "hello, world"
- * // Dynamically typed method handle invocation:
- * MethodHandles.invokeExact(greeter); // also prints "hello, world"
- * greeter.setGreeting("howdy");
- * mh.invokeExact(); // prints "howdy, world" (object-like mutable behavior)
- * </pre></blockquote>
- * <p>
- * In the example of {@code Greeter}, the method {@code run} provides the entry point.
- * The entry point need not be a constant value; it may be independently
- * computed in each call to the constructor. The entry point does not
- * even need to be a method on the {@code Greeter} class, though
- * that is the typical case.
- * <p>
- * The entry point may also be provided symbolically, in which case the the
- * {@code JavaMethodHandle} constructor performs the lookup of the entry point.
- * This makes it possible to use {@code JavaMethodHandle} to create an anonymous
- * inner class:
- * <p><blockquote><pre>
- * // We can also do this with symbolic names and/or inner classes:
- * MethodHandles.invokeExact(new JavaMethodHandle("yow") {
- * void yow() { System.out.println("yow, world"); }
- * });
- * </pre></blockquote>
- * <p>
- * Here is similar lower-level code which works in terms of a bound method handle.
- * <p><blockquote><pre>
- * class Greeter {
- * public void run() { System.out.println("hello, "+greetee); }
- * private final String greetee;
- * Greeter(String greetee) { this.greetee = greetee; }
- * // the entry point function is computed once:
- * private static final MethodHandle RUN
- * = MethodHandles.findVirtual(Greeter.class, "run",
- * MethodType.make(void.class));
- * }
- * // class Main { public static void main(String... av) { ...
- * Greeter greeter = new Greeter("world");
- * greeter.run(); // prints "hello, world"
- * MethodHandle mh = MethodHanndles.insertArgument(Greeter.RUN, 0, greeter);
- * mh.invokeExact(); // also prints "hello, world"
- * </pre></blockquote>
- * Note that the method handle must be separately created as a view on the base object.
- * This increases footprint, complexity, and dynamic indirections.
- * <p>
- * Here is a pure functional value expressed most concisely as an anonymous inner class:
- * <p><blockquote><pre>
- * // class Main { public static void main(String... av) { ...
- * final String greetee = "world";
- * MethodHandle greeter = new JavaMethodHandle("run") {
- * private void run() { System.out.println("hello, "+greetee); }
- * }
- * greeter.invokeExact(); // prints "hello, world"
- * </pre></blockquote>
- * <p>
- * Here is an abstract parameterized lvalue, efficiently expressed as a subtype of MethodHandle,
- * and instantiated as an anonymous class. The data structure is a handle to 1-D array,
- * with a specialized index type (long). It is created by inner class, and uses
- * signature-polymorphic APIs throughout.
- * <p><blockquote><pre>
- * abstract class AssignableMethodHandle extends JavaMethodHandle {
- * private final MethodHandle setter;
- * public MethodHandle setter() { return setter; }
- * public AssignableMethodHandle(String get, String set) {
- * super(get);
- * MethodType getType = this.type();
- * MethodType setType = getType.insertParameterType(getType.parameterCount(), getType.returnType()).changeReturnType(void.class);
- * this.setter = MethodHandles.publicLookup().bind(this, set, setType);
- * }
- * }
- * // class Main { public static void main(String... av) { ...
- * final Number[] stuff = { 123, 456 };
- * AssignableMethodHandle stuffPtr = new AssignableMethodHandle("get", "set") {
- * public Number get(long i) { return stuff[(int)i]; }
- * public void set(long i, Object x) { stuff[(int)i] = x; }
- * }
- * int x = (Integer) stuffPtr.<Number>invokeExact(1L); // 456
- * stuffPtr.setter().<void>invokeExact(0L, (Number) 789); // replaces 123 with 789
- * </pre></blockquote>
- * @see MethodHandle
- * @deprecated The JSR 292 EG intends to replace {@code JavaMethodHandle} with
- * an interface-based API for mixing method handle behavior with other classes.
- * @author John Rose, JSR 292 EG
- */
-public abstract class JavaMethodHandle
- // Note: This is an implementation inheritance hack, and will be removed
- // with a JVM change which moves the required hidden behavior onto this class.
- extends sun.dyn.BoundMethodHandle
-{
- private static final Access IMPL_TOKEN = Access.getToken();
-
- /**
- * When creating a {@code JavaMethodHandle}, the actual method handle
- * invocation behavior will be delegated to the specified {@code entryPoint}.
- * This may be any method handle which can take the newly constructed object
- * as a leading parameter.
- * <p>
- * The method handle type of {@code this} (i.e, the fully constructed object)
- * will be {@code entryPoint}, minus the leading argument.
- * The leading argument will be bound to {@code this} on every method
- * handle invocation.
- * @param entryPoint the method handle to handle calls
- */
- protected JavaMethodHandle(MethodHandle entryPoint) {
- super(entryPoint);
- }
-}
--- a/jdk/src/share/classes/sun/dyn/MethodHandleImpl.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/MethodHandleImpl.java Tue Dec 21 18:45:45 2010 -0800
@@ -199,7 +199,7 @@
return allocator;
}
- static final class AllocateObject<C> extends JavaMethodHandle {
+ static final class AllocateObject<C> extends BoundMethodHandle {
private static final Unsafe unsafe = Unsafe.getUnsafe();
private final Class<C> allocateClass;
@@ -207,7 +207,7 @@
private AllocateObject(MethodHandle invoker,
Class<C> allocateClass, MethodHandle rawConstructor) {
- super(invoker);
+ super(Access.TOKEN, invoker);
this.allocateClass = allocateClass;
this.rawConstructor = rawConstructor;
}
@@ -237,7 +237,7 @@
}
@Override
public String toString() {
- return allocateClass.getSimpleName();
+ return addTypeString(allocateClass.getSimpleName(), this);
}
@SuppressWarnings("unchecked")
private C allocate() throws InstantiationException {
@@ -245,52 +245,52 @@
}
private C invoke_V(Object... av) throws Throwable {
C obj = allocate();
- rawConstructor.<void>invokeExact((Object)obj, av);
+ rawConstructor.invokeExact((Object)obj, av);
return obj;
}
private C invoke_L0() throws Throwable {
C obj = allocate();
- rawConstructor.<void>invokeExact((Object)obj);
+ rawConstructor.invokeExact((Object)obj);
return obj;
}
private C invoke_L1(Object a0) throws Throwable {
C obj = allocate();
- rawConstructor.<void>invokeExact((Object)obj, a0);
+ rawConstructor.invokeExact((Object)obj, a0);
return obj;
}
private C invoke_L2(Object a0, Object a1) throws Throwable {
C obj = allocate();
- rawConstructor.<void>invokeExact((Object)obj, a0, a1);
+ rawConstructor.invokeExact((Object)obj, a0, a1);
return obj;
}
private C invoke_L3(Object a0, Object a1, Object a2) throws Throwable {
C obj = allocate();
- rawConstructor.<void>invokeExact((Object)obj, a0, a1, a2);
+ rawConstructor.invokeExact((Object)obj, a0, a1, a2);
return obj;
}
private C invoke_L4(Object a0, Object a1, Object a2, Object a3) throws Throwable {
C obj = allocate();
- rawConstructor.<void>invokeExact((Object)obj, a0, a1, a2, a3);
+ rawConstructor.invokeExact((Object)obj, a0, a1, a2, a3);
return obj;
}
private C invoke_L5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable {
C obj = allocate();
- rawConstructor.<void>invokeExact((Object)obj, a0, a1, a2, a3, a4);
+ rawConstructor.invokeExact((Object)obj, a0, a1, a2, a3, a4);
return obj;
}
private C invoke_L6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable {
C obj = allocate();
- rawConstructor.<void>invokeExact((Object)obj, a0, a1, a2, a3, a4, a5);
+ rawConstructor.invokeExact((Object)obj, a0, a1, a2, a3, a4, a5);
return obj;
}
private C invoke_L7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable {
C obj = allocate();
- rawConstructor.<void>invokeExact((Object)obj, a0, a1, a2, a3, a4, a5, a6);
+ rawConstructor.invokeExact((Object)obj, a0, a1, a2, a3, a4, a5, a6);
return obj;
}
private C invoke_L8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable {
C obj = allocate();
- rawConstructor.<void>invokeExact((Object)obj, a0, a1, a2, a3, a4, a5, a6, a7);
+ rawConstructor.invokeExact((Object)obj, a0, a1, a2, a3, a4, a5, a6, a7);
return obj;
}
static MethodHandle[] makeInvokes() {
@@ -369,19 +369,19 @@
return mhs[isSetter ? 1 : 0];
}
- static final class FieldAccessor<C,V> extends JavaMethodHandle {
+ static final class FieldAccessor<C,V> extends BoundMethodHandle {
private static final Unsafe unsafe = Unsafe.getUnsafe();
final Object base; // for static refs only
final long offset;
final String name;
public FieldAccessor(Access token, MemberName field, boolean isSetter) {
- super(fhandle(field.getDeclaringClass(), field.getFieldType(), isSetter, field.isStatic()));
+ super(Access.TOKEN, fhandle(field.getDeclaringClass(), field.getFieldType(), isSetter, field.isStatic()));
this.offset = (long) field.getVMIndex(token);
this.name = field.getName();
this.base = staticBase(field);
}
- public String toString() { return name; }
+ public String toString() { return addTypeString(name, this); }
int getFieldI(C obj) { return unsafe.getInt(obj, offset); }
void setFieldI(C obj, int x) { unsafe.putInt(obj, offset, x); }
@@ -560,7 +560,9 @@
MethodHandle bindReceiver(Access token,
MethodHandle target, Object receiver) {
Access.check(token);
- if (target instanceof AdapterMethodHandle) {
+ if (target instanceof AdapterMethodHandle &&
+ ((AdapterMethodHandle)target).conversionOp() == MethodHandleNatives.Constants.OP_RETYPE_ONLY
+ ) {
Object info = MethodHandleNatives.getTargetInfo(target);
if (info instanceof DirectMethodHandle) {
DirectMethodHandle dmh = (DirectMethodHandle) info;
@@ -908,11 +910,11 @@
throw new UnsupportedOperationException("NYI");
}
- private static class GuardWithTest extends JavaMethodHandle {
+ private static class GuardWithTest extends BoundMethodHandle {
private final MethodHandle test, target, fallback;
private GuardWithTest(MethodHandle invoker,
MethodHandle test, MethodHandle target, MethodHandle fallback) {
- super(invoker);
+ super(Access.TOKEN, invoker);
this.test = test;
this.target = target;
this.fallback = fallback;
@@ -946,57 +948,57 @@
}
@Override
public String toString() {
- return target.toString();
+ return addTypeString(target, this);
}
private Object invoke_V(Object... av) throws Throwable {
- if (test.<boolean>invokeExact(av))
- return target.<Object>invokeExact(av);
- return fallback.<Object>invokeExact(av);
+ if ((boolean) test.invokeExact(av))
+ return target.invokeExact(av);
+ return fallback.invokeExact(av);
}
private Object invoke_L0() throws Throwable {
- if (test.<boolean>invokeExact())
- return target.<Object>invokeExact();
- return fallback.<Object>invokeExact();
+ if ((boolean) test.invokeExact())
+ return target.invokeExact();
+ return fallback.invokeExact();
}
private Object invoke_L1(Object a0) throws Throwable {
- if (test.<boolean>invokeExact(a0))
- return target.<Object>invokeExact(a0);
- return fallback.<Object>invokeExact(a0);
+ if ((boolean) test.invokeExact(a0))
+ return target.invokeExact(a0);
+ return fallback.invokeExact(a0);
}
private Object invoke_L2(Object a0, Object a1) throws Throwable {
- if (test.<boolean>invokeExact(a0, a1))
- return target.<Object>invokeExact(a0, a1);
- return fallback.<Object>invokeExact(a0, a1);
+ if ((boolean) test.invokeExact(a0, a1))
+ return target.invokeExact(a0, a1);
+ return fallback.invokeExact(a0, a1);
}
private Object invoke_L3(Object a0, Object a1, Object a2) throws Throwable {
- if (test.<boolean>invokeExact(a0, a1, a2))
- return target.<Object>invokeExact(a0, a1, a2);
- return fallback.<Object>invokeExact(a0, a1, a2);
+ if ((boolean) test.invokeExact(a0, a1, a2))
+ return target.invokeExact(a0, a1, a2);
+ return fallback.invokeExact(a0, a1, a2);
}
private Object invoke_L4(Object a0, Object a1, Object a2, Object a3) throws Throwable {
- if (test.<boolean>invokeExact(a0, a1, a2, a3))
- return target.<Object>invokeExact(a0, a1, a2, a3);
- return fallback.<Object>invokeExact(a0, a1, a2, a3);
+ if ((boolean) test.invokeExact(a0, a1, a2, a3))
+ return target.invokeExact(a0, a1, a2, a3);
+ return fallback.invokeExact(a0, a1, a2, a3);
}
private Object invoke_L5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable {
- if (test.<boolean>invokeExact(a0, a1, a2, a3, a4))
- return target.<Object>invokeExact(a0, a1, a2, a3, a4);
- return fallback.<Object>invokeExact(a0, a1, a2, a3, a4);
+ if ((boolean) test.invokeExact(a0, a1, a2, a3, a4))
+ return target.invokeExact(a0, a1, a2, a3, a4);
+ return fallback.invokeExact(a0, a1, a2, a3, a4);
}
private Object invoke_L6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable {
- if (test.<boolean>invokeExact(a0, a1, a2, a3, a4, a5))
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5);
- return fallback.<Object>invokeExact(a0, a1, a2, a3, a4, a5);
+ if ((boolean) test.invokeExact(a0, a1, a2, a3, a4, a5))
+ return target.invokeExact(a0, a1, a2, a3, a4, a5);
+ return fallback.invokeExact(a0, a1, a2, a3, a4, a5);
}
private Object invoke_L7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable {
- if (test.<boolean>invokeExact(a0, a1, a2, a3, a4, a5, a6))
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6);
- return fallback.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6);
+ if ((boolean) test.invokeExact(a0, a1, a2, a3, a4, a5, a6))
+ return target.invokeExact(a0, a1, a2, a3, a4, a5, a6);
+ return fallback.invokeExact(a0, a1, a2, a3, a4, a5, a6);
}
private Object invoke_L8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable {
- if (test.<boolean>invokeExact(a0, a1, a2, a3, a4, a5, a6, a7))
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6, a7);
- return fallback.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6, a7);
+ if ((boolean) test.invokeExact(a0, a1, a2, a3, a4, a5, a6, a7))
+ return target.invokeExact(a0, a1, a2, a3, a4, a5, a6, a7);
+ return fallback.invokeExact(a0, a1, a2, a3, a4, a5, a6, a7);
}
static MethodHandle[] makeInvokes() {
ArrayList<MethodHandle> invokes = new ArrayList<MethodHandle>();
@@ -1036,7 +1038,7 @@
return GuardWithTest.make(token, test, target, fallback);
}
- private static class GuardWithCatch extends JavaMethodHandle {
+ private static class GuardWithCatch extends BoundMethodHandle {
private final MethodHandle target;
private final Class<? extends Throwable> exType;
private final MethodHandle catcher;
@@ -1045,93 +1047,93 @@
}
public GuardWithCatch(MethodHandle invoker,
MethodHandle target, Class<? extends Throwable> exType, MethodHandle catcher) {
- super(invoker);
+ super(Access.TOKEN, invoker);
this.target = target;
this.exType = exType;
this.catcher = catcher;
}
@Override
public String toString() {
- return target.toString();
+ return addTypeString(target, this);
}
private Object invoke_V(Object... av) throws Throwable {
try {
- return target.<Object>invokeExact(av);
+ return target.invokeExact(av);
} catch (Throwable t) {
if (!exType.isInstance(t)) throw t;
- return catcher.<Object>invokeExact(t, av);
+ return catcher.invokeExact(t, av);
}
}
private Object invoke_L0() throws Throwable {
try {
- return target.<Object>invokeExact();
+ return target.invokeExact();
} catch (Throwable t) {
if (!exType.isInstance(t)) throw t;
- return catcher.<Object>invokeExact(t);
+ return catcher.invokeExact(t);
}
}
private Object invoke_L1(Object a0) throws Throwable {
try {
- return target.<Object>invokeExact(a0);
+ return target.invokeExact(a0);
} catch (Throwable t) {
if (!exType.isInstance(t)) throw t;
- return catcher.<Object>invokeExact(t, a0);
+ return catcher.invokeExact(t, a0);
}
}
private Object invoke_L2(Object a0, Object a1) throws Throwable {
try {
- return target.<Object>invokeExact(a0, a1);
+ return target.invokeExact(a0, a1);
} catch (Throwable t) {
if (!exType.isInstance(t)) throw t;
- return catcher.<Object>invokeExact(t, a0, a1);
+ return catcher.invokeExact(t, a0, a1);
}
}
private Object invoke_L3(Object a0, Object a1, Object a2) throws Throwable {
try {
- return target.<Object>invokeExact(a0, a1, a2);
+ return target.invokeExact(a0, a1, a2);
} catch (Throwable t) {
if (!exType.isInstance(t)) throw t;
- return catcher.<Object>invokeExact(t, a0, a1, a2);
+ return catcher.invokeExact(t, a0, a1, a2);
}
}
private Object invoke_L4(Object a0, Object a1, Object a2, Object a3) throws Throwable {
try {
- return target.<Object>invokeExact(a0, a1, a2, a3);
+ return target.invokeExact(a0, a1, a2, a3);
} catch (Throwable t) {
if (!exType.isInstance(t)) throw t;
- return catcher.<Object>invokeExact(t, a0, a1, a2, a3);
+ return catcher.invokeExact(t, a0, a1, a2, a3);
}
}
private Object invoke_L5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable {
try {
- return target.<Object>invokeExact(a0, a1, a2, a3, a4);
+ return target.invokeExact(a0, a1, a2, a3, a4);
} catch (Throwable t) {
if (!exType.isInstance(t)) throw t;
- return catcher.<Object>invokeExact(t, a0, a1, a2, a3, a4);
+ return catcher.invokeExact(t, a0, a1, a2, a3, a4);
}
}
private Object invoke_L6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable {
try {
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5);
+ return target.invokeExact(a0, a1, a2, a3, a4, a5);
} catch (Throwable t) {
if (!exType.isInstance(t)) throw t;
- return catcher.<Object>invokeExact(t, a0, a1, a2, a3, a4, a5);
+ return catcher.invokeExact(t, a0, a1, a2, a3, a4, a5);
}
}
private Object invoke_L7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable {
try {
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6);
+ return target.invokeExact(a0, a1, a2, a3, a4, a5, a6);
} catch (Throwable t) {
if (!exType.isInstance(t)) throw t;
- return catcher.<Object>invokeExact(t, a0, a1, a2, a3, a4, a5, a6);
+ return catcher.invokeExact(t, a0, a1, a2, a3, a4, a5, a6);
}
}
private Object invoke_L8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable {
try {
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6, a7);
+ return target.invokeExact(a0, a1, a2, a3, a4, a5, a6, a7);
} catch (Throwable t) {
if (!exType.isInstance(t)) throw t;
- return catcher.<Object>invokeExact(t, a0, a1, a2, a3, a4, a5, a6, a7);
+ return catcher.invokeExact(t, a0, a1, a2, a3, a4, a5, a6, a7);
}
}
static MethodHandle[] makeInvokes() {
@@ -1217,21 +1219,24 @@
if (target != null)
name = MethodHandleNatives.getMethodName(target);
if (name == null)
- return "<unknown>";
- return name.getName();
+ return "invoke" + target.type();
+ return name.getName() + target.type();
}
- public static String addTypeString(MethodHandle target) {
- if (target == null) return "null";
- return target.toString() + target.type();
+ static String addTypeString(Object obj, MethodHandle target) {
+ String str = String.valueOf(obj);
+ if (target == null) return str;
+ int paren = str.indexOf('(');
+ if (paren >= 0) str = str.substring(0, paren);
+ return str + target.type();
}
- public static void checkSpreadArgument(Object av, int n) {
+ static void checkSpreadArgument(Object av, int n) {
if (av == null ? n != 0 : ((Object[])av).length != n)
throw newIllegalArgumentException("Array is not of length "+n);
}
- public static void raiseException(int code, Object actual, Object required) {
+ static void raiseException(int code, Object actual, Object required) {
String message;
// disregard the identity of the actual object, if it is not a class:
if (!(actual instanceof Class) && !(actual instanceof MethodType))
@@ -1257,4 +1262,9 @@
Access.check(token);
return MethodHandleNatives.getBootstrap(callerClass);
}
+
+ public static MethodHandle withTypeHandler(Access token, MethodHandle target, MethodHandle typeHandler) {
+ Access.check(token);
+ return AdapterMethodHandle.makeTypeHandler(token, target, typeHandler);
+ }
}
--- a/jdk/src/share/classes/sun/dyn/MethodHandleNatives.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/MethodHandleNatives.java Tue Dec 21 18:45:45 2010 -0800
@@ -317,6 +317,20 @@
}
/**
+ * The JVM wants to use a MethodType with invokeGeneric. Give the runtime fair warning.
+ */
+ static void notifyGenericMethodType(MethodType type) {
+ try {
+ // Trigger adapter creation.
+ InvokeGeneric.genericInvokerOf(type);
+ } catch (Exception ex) {
+ Error err = new InternalError("Exception while resolving invokeGeneric");
+ err.initCause(ex);
+ throw err;
+ }
+ }
+
+ /**
* The JVM is resolving a CONSTANT_MethodHandle CP entry. And it wants our help.
* It will make an up-call to this method. (Do not change the name or signature.)
*/
--- a/jdk/src/share/classes/sun/dyn/MethodTypeImpl.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/MethodTypeImpl.java Tue Dec 21 18:45:45 2010 -0800
@@ -48,6 +48,7 @@
final long primCounts; // packed prim & double counts
final int vmslots; // total number of parameter slots
final MethodType erasedType; // the canonical erasure
+
/*lazy*/ MethodType primsAsBoxes; // replace prims by wrappers
/*lazy*/ MethodType primArgsAsBoxes; // wrap args only; make raw return
/*lazy*/ MethodType primsAsInts; // replace prims by int/long
@@ -59,6 +60,7 @@
/*lazy*/ FromGeneric fromGeneric; // convert cs. w/o prims to with
/*lazy*/ SpreadGeneric[] spreadGeneric; // expand one argument to many
/*lazy*/ FilterGeneric filterGeneric; // convert argument(s) on the fly
+ /*lazy*/ MethodHandle genericInvoker; // hook for invokeGeneric
public MethodType erasedType() {
return erasedType;
--- a/jdk/src/share/classes/sun/dyn/SpreadGeneric.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/SpreadGeneric.java Tue Dec 21 18:45:45 2010 -0800
@@ -208,7 +208,7 @@
* The invoker is kept separate from the target because it can be
* generated once per type erasure family, and reused across adapters.
*/
- static abstract class Adapter extends JavaMethodHandle {
+ static abstract class Adapter extends BoundMethodHandle {
/*
* class X<<R,int M,int N>> extends Adapter {
* (Object**N)=>R target;
@@ -221,21 +221,21 @@
@Override
public String toString() {
- return target.toString();
+ return MethodHandleImpl.addTypeString(target, this);
}
static final MethodHandle NO_ENTRY = ValueConversions.identity();
protected boolean isPrototype() { return target == null; }
protected Adapter(SpreadGeneric outer) {
- super(NO_ENTRY);
+ super(Access.TOKEN, NO_ENTRY);
this.outer = outer;
this.target = null;
assert(isPrototype());
}
protected Adapter(SpreadGeneric outer, MethodHandle target) {
- super(outer.entryPoint);
+ super(Access.TOKEN, outer.entryPoint);
this.outer = outer;
this.target = target;
}
@@ -277,12 +277,12 @@
protected xS2(SpreadGeneric outer, MethodHandle t) { super(outer, t); }
protected xS2 makeInstance(SpreadGeneric outer, MethodHandle t) { return new xS2(outer, t); }
protected Object invoke_S0(Object a0, Object a1, Object av) throws Throwable { av = super.check(av,0);
- return target.<Object>invokeExact(a0, a1)); }
+ return target.invokeExact(a0, a1)); }
protected Object invoke_S1(Object a0, Object av) throws Throwable { av = super.check(av,1);
- return target.<Object>invokeExact(a0,
+ return target.invokeExact(a0,
super.select(av,0)); }
protected Object invoke_S2(Object a0, Object av) throws Throwable { av = super.check(av,1);
- return target.<Object>invokeExact(
+ return target.invokeExact(
super.select(av,0), super.select(av,1)); }
}
// */
@@ -300,10 +300,10 @@
" protected @cat@(SpreadGeneric outer, MethodHandle t) { super(outer, t); }",
" protected @cat@ makeInstance(SpreadGeneric outer, MethodHandle t) { return new @cat@(outer, t); }",
" protected Object invoke_S0(@Tvav,@Object av) throws Throwable { av = super.check(av, 0);",
- " return target.<Object>invokeExact(@av@); }",
+ " return target.invokeExact(@av@); }",
" //@each-S@",
" protected Object invoke_S@S@(@Tvav,@Object av) throws Throwable { av = super.check(av, @S@);",
- " return target.<Object>invokeExact(@av,@@sv@); }",
+ " return target.invokeExact(@av,@@sv@); }",
" //@end-S@",
" }",
} };
@@ -414,16 +414,16 @@
protected S0(SpreadGeneric outer, MethodHandle t) { super(outer, t); }
protected S0 makeInstance(SpreadGeneric outer, MethodHandle t) { return new S0(outer, t); }
protected Object invoke_S0(Object av) throws Throwable { av = super.check(av, 0);
- return target.<Object>invokeExact(); }
+ return target.invokeExact(); }
}
static class S1 extends Adapter {
protected S1(SpreadGeneric outer) { super(outer); } // to build prototype
protected S1(SpreadGeneric outer, MethodHandle t) { super(outer, t); }
protected S1 makeInstance(SpreadGeneric outer, MethodHandle t) { return new S1(outer, t); }
protected Object invoke_S0(Object a0, Object av) throws Throwable { av = super.check(av, 0);
- return target.<Object>invokeExact(a0); }
+ return target.invokeExact(a0); }
protected Object invoke_S1(Object av) throws Throwable { av = super.check(av, 1);
- return target.<Object>invokeExact(
+ return target.invokeExact(
super.select(av,0)); }
}
static class S2 extends Adapter {
@@ -431,12 +431,12 @@
protected S2(SpreadGeneric outer, MethodHandle t) { super(outer, t); }
protected S2 makeInstance(SpreadGeneric outer, MethodHandle t) { return new S2(outer, t); }
protected Object invoke_S0(Object a0, Object a1, Object av) throws Throwable { av = super.check(av, 0);
- return target.<Object>invokeExact(a0, a1); }
+ return target.invokeExact(a0, a1); }
protected Object invoke_S1(Object a0, Object av) throws Throwable { av = super.check(av, 1);
- return target.<Object>invokeExact(a0,
+ return target.invokeExact(a0,
super.select(av,0)); }
protected Object invoke_S2(Object av) throws Throwable { av = super.check(av, 2);
- return target.<Object>invokeExact(
+ return target.invokeExact(
super.select(av,0), super.select(av,1)); }
}
static class S3 extends Adapter {
@@ -444,15 +444,15 @@
protected S3(SpreadGeneric outer, MethodHandle t) { super(outer, t); }
protected S3 makeInstance(SpreadGeneric outer, MethodHandle t) { return new S3(outer, t); }
protected Object invoke_S0(Object a0, Object a1, Object a2, Object av) throws Throwable { av = super.check(av, 0);
- return target.<Object>invokeExact(a0, a1, a2); }
+ return target.invokeExact(a0, a1, a2); }
protected Object invoke_S1(Object a0, Object a1, Object av) throws Throwable { av = super.check(av, 1);
- return target.<Object>invokeExact(a0, a1,
+ return target.invokeExact(a0, a1,
super.select(av,0)); }
protected Object invoke_S2(Object a0, Object av) throws Throwable { av = super.check(av, 2);
- return target.<Object>invokeExact(a0,
+ return target.invokeExact(a0,
super.select(av,0), super.select(av,1)); }
protected Object invoke_S3(Object av) throws Throwable { av = super.check(av, 3);
- return target.<Object>invokeExact(
+ return target.invokeExact(
super.select(av,0), super.select(av,1), super.select(av,2)); }
}
static class S4 extends Adapter {
@@ -460,18 +460,18 @@
protected S4(SpreadGeneric outer, MethodHandle t) { super(outer, t); }
protected S4 makeInstance(SpreadGeneric outer, MethodHandle t) { return new S4(outer, t); }
protected Object invoke_S0(Object a0, Object a1, Object a2, Object a3, Object av) throws Throwable { av = super.check(av, 0);
- return target.<Object>invokeExact(a0, a1, a2, a3); }
+ return target.invokeExact(a0, a1, a2, a3); }
protected Object invoke_S1(Object a0, Object a1, Object a2, Object av) throws Throwable { av = super.check(av, 1);
- return target.<Object>invokeExact(a0, a1, a2,
+ return target.invokeExact(a0, a1, a2,
super.select(av,0)); }
protected Object invoke_S2(Object a0, Object a1, Object av) throws Throwable { av = super.check(av, 2);
- return target.<Object>invokeExact(a0, a1,
+ return target.invokeExact(a0, a1,
super.select(av,0), super.select(av,1)); }
protected Object invoke_S3(Object a0, Object av) throws Throwable { av = super.check(av, 3);
- return target.<Object>invokeExact(a0,
+ return target.invokeExact(a0,
super.select(av,0), super.select(av,1), super.select(av,2)); }
protected Object invoke_S4(Object av) throws Throwable { av = super.check(av, 4);
- return target.<Object>invokeExact(
+ return target.invokeExact(
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3)); }
}
static class S5 extends Adapter {
@@ -479,21 +479,21 @@
protected S5(SpreadGeneric outer, MethodHandle t) { super(outer, t); }
protected S5 makeInstance(SpreadGeneric outer, MethodHandle t) { return new S5(outer, t); }
protected Object invoke_S0(Object a0, Object a1, Object a2, Object a3, Object a4, Object av) throws Throwable { av = super.check(av, 0);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4); }
+ return target.invokeExact(a0, a1, a2, a3, a4); }
protected Object invoke_S1(Object a0, Object a1, Object a2, Object a3, Object av) throws Throwable { av = super.check(av, 1);
- return target.<Object>invokeExact(a0, a1, a2, a3,
+ return target.invokeExact(a0, a1, a2, a3,
super.select(av,0)); }
protected Object invoke_S2(Object a0, Object a1, Object a2, Object av) throws Throwable { av = super.check(av, 2);
- return target.<Object>invokeExact(a0, a1, a2,
+ return target.invokeExact(a0, a1, a2,
super.select(av,0), super.select(av,1)); }
protected Object invoke_S3(Object a0, Object a1, Object av) throws Throwable { av = super.check(av, 3);
- return target.<Object>invokeExact(a0, a1,
+ return target.invokeExact(a0, a1,
super.select(av,0), super.select(av,1), super.select(av,2)); }
protected Object invoke_S4(Object a0, Object av) throws Throwable { av = super.check(av, 4);
- return target.<Object>invokeExact(a0,
+ return target.invokeExact(a0,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3)); }
protected Object invoke_S5(Object av) throws Throwable { av = super.check(av, 5);
- return target.<Object>invokeExact(
+ return target.invokeExact(
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4)); }
}
@@ -502,25 +502,25 @@
protected S6(SpreadGeneric outer, MethodHandle t) { super(outer, t); }
protected S6 makeInstance(SpreadGeneric outer, MethodHandle t) { return new S6(outer, t); }
protected Object invoke_S0(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object av) throws Throwable { av = super.check(av, 0);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5); }
+ return target.invokeExact(a0, a1, a2, a3, a4, a5); }
protected Object invoke_S1(Object a0, Object a1, Object a2, Object a3, Object a4, Object av) throws Throwable { av = super.check(av, 1);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4,
+ return target.invokeExact(a0, a1, a2, a3, a4,
super.select(av,0)); }
protected Object invoke_S2(Object a0, Object a1, Object a2, Object a3, Object av) throws Throwable { av = super.check(av, 2);
- return target.<Object>invokeExact(a0, a1, a2, a3,
+ return target.invokeExact(a0, a1, a2, a3,
super.select(av,0), super.select(av,1)); }
protected Object invoke_S3(Object a0, Object a1, Object a2, Object av) throws Throwable { av = super.check(av, 3);
- return target.<Object>invokeExact(a0, a1, a2,
+ return target.invokeExact(a0, a1, a2,
super.select(av,0), super.select(av,1), super.select(av,2)); }
protected Object invoke_S4(Object a0, Object a1, Object av) throws Throwable { av = super.check(av, 4);
- return target.<Object>invokeExact(a0, a1,
+ return target.invokeExact(a0, a1,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3)); }
protected Object invoke_S5(Object a0, Object av) throws Throwable { av = super.check(av, 5);
- return target.<Object>invokeExact(a0,
+ return target.invokeExact(a0,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4)); }
protected Object invoke_S6(Object av) throws Throwable { av = super.check(av, 6);
- return target.<Object>invokeExact(
+ return target.invokeExact(
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5)); }
}
@@ -529,29 +529,29 @@
protected S7(SpreadGeneric outer, MethodHandle t) { super(outer, t); }
protected S7 makeInstance(SpreadGeneric outer, MethodHandle t) { return new S7(outer, t); }
protected Object invoke_S0(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object av) throws Throwable { av = super.check(av, 0);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6); }
+ return target.invokeExact(a0, a1, a2, a3, a4, a5, a6); }
protected Object invoke_S1(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object av) throws Throwable { av = super.check(av, 1);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5,
+ return target.invokeExact(a0, a1, a2, a3, a4, a5,
super.select(av,0)); }
protected Object invoke_S2(Object a0, Object a1, Object a2, Object a3, Object a4, Object av) throws Throwable { av = super.check(av, 2);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4,
+ return target.invokeExact(a0, a1, a2, a3, a4,
super.select(av,0), super.select(av,1)); }
protected Object invoke_S3(Object a0, Object a1, Object a2, Object a3, Object av) throws Throwable { av = super.check(av, 3);
- return target.<Object>invokeExact(a0, a1, a2, a3,
+ return target.invokeExact(a0, a1, a2, a3,
super.select(av,0), super.select(av,1), super.select(av,2)); }
protected Object invoke_S4(Object a0, Object a1, Object a2, Object av) throws Throwable { av = super.check(av, 4);
- return target.<Object>invokeExact(a0, a1, a2,
+ return target.invokeExact(a0, a1, a2,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3)); }
protected Object invoke_S5(Object a0, Object a1, Object av) throws Throwable { av = super.check(av, 5);
- return target.<Object>invokeExact(a0, a1,
+ return target.invokeExact(a0, a1,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4)); }
protected Object invoke_S6(Object a0, Object av) throws Throwable { av = super.check(av, 6);
- return target.<Object>invokeExact(a0,
+ return target.invokeExact(a0,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5)); }
protected Object invoke_S7(Object av) throws Throwable { av = super.check(av, 7);
- return target.<Object>invokeExact(
+ return target.invokeExact(
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5), super.select(av,6)); }
}
@@ -560,33 +560,33 @@
protected S8(SpreadGeneric outer, MethodHandle t) { super(outer, t); }
protected S8 makeInstance(SpreadGeneric outer, MethodHandle t) { return new S8(outer, t); }
protected Object invoke_S0(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object av) throws Throwable { av = super.check(av, 0);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6, a7); }
+ return target.invokeExact(a0, a1, a2, a3, a4, a5, a6, a7); }
protected Object invoke_S1(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object av) throws Throwable { av = super.check(av, 1);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6,
+ return target.invokeExact(a0, a1, a2, a3, a4, a5, a6,
super.select(av,0)); }
protected Object invoke_S2(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object av) throws Throwable { av = super.check(av, 2);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5,
+ return target.invokeExact(a0, a1, a2, a3, a4, a5,
super.select(av,0), super.select(av,1)); }
protected Object invoke_S3(Object a0, Object a1, Object a2, Object a3, Object a4, Object av) throws Throwable { av = super.check(av, 3);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4,
+ return target.invokeExact(a0, a1, a2, a3, a4,
super.select(av,0), super.select(av,1), super.select(av,2)); }
protected Object invoke_S4(Object a0, Object a1, Object a2, Object a3, Object av) throws Throwable { av = super.check(av, 4);
- return target.<Object>invokeExact(a0, a1, a2, a3,
+ return target.invokeExact(a0, a1, a2, a3,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3)); }
protected Object invoke_S5(Object a0, Object a1, Object a2, Object av) throws Throwable { av = super.check(av, 5);
- return target.<Object>invokeExact(a0, a1, a2,
+ return target.invokeExact(a0, a1, a2,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4)); }
protected Object invoke_S6(Object a0, Object a1, Object av) throws Throwable { av = super.check(av, 6);
- return target.<Object>invokeExact(a0, a1,
+ return target.invokeExact(a0, a1,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5)); }
protected Object invoke_S7(Object a0, Object av) throws Throwable { av = super.check(av, 7);
- return target.<Object>invokeExact(a0,
+ return target.invokeExact(a0,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5), super.select(av,6)); }
protected Object invoke_S8(Object av) throws Throwable { av = super.check(av, 8);
- return target.<Object>invokeExact(
+ return target.invokeExact(
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5), super.select(av,6), super.select(av,7)); }
}
@@ -595,37 +595,37 @@
protected S9(SpreadGeneric outer, MethodHandle t) { super(outer, t); }
protected S9 makeInstance(SpreadGeneric outer, MethodHandle t) { return new S9(outer, t); }
protected Object invoke_S0(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object av) throws Throwable { av = super.check(av, 0);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6, a7, a8); }
+ return target.invokeExact(a0, a1, a2, a3, a4, a5, a6, a7, a8); }
protected Object invoke_S1(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object av) throws Throwable { av = super.check(av, 1);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6, a7,
+ return target.invokeExact(a0, a1, a2, a3, a4, a5, a6, a7,
super.select(av,0)); }
protected Object invoke_S2(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object av) throws Throwable { av = super.check(av, 2);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6,
+ return target.invokeExact(a0, a1, a2, a3, a4, a5, a6,
super.select(av,0), super.select(av,1)); }
protected Object invoke_S3(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object av) throws Throwable { av = super.check(av, 3);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5,
+ return target.invokeExact(a0, a1, a2, a3, a4, a5,
super.select(av,0), super.select(av,1), super.select(av,2)); }
protected Object invoke_S4(Object a0, Object a1, Object a2, Object a3, Object a4, Object av) throws Throwable { av = super.check(av, 4);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4,
+ return target.invokeExact(a0, a1, a2, a3, a4,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3)); }
protected Object invoke_S5(Object a0, Object a1, Object a2, Object a3, Object av) throws Throwable { av = super.check(av, 5);
- return target.<Object>invokeExact(a0, a1, a2, a3,
+ return target.invokeExact(a0, a1, a2, a3,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4)); }
protected Object invoke_S6(Object a0, Object a1, Object a2, Object av) throws Throwable { av = super.check(av, 6);
- return target.<Object>invokeExact(a0, a1, a2,
+ return target.invokeExact(a0, a1, a2,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5)); }
protected Object invoke_S7(Object a0, Object a1, Object av) throws Throwable { av = super.check(av, 7);
- return target.<Object>invokeExact(a0, a1,
+ return target.invokeExact(a0, a1,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5), super.select(av,6)); }
protected Object invoke_S8(Object a0, Object av) throws Throwable { av = super.check(av, 8);
- return target.<Object>invokeExact(a0,
+ return target.invokeExact(a0,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5), super.select(av,6), super.select(av,7)); }
protected Object invoke_S9(Object av) throws Throwable { av = super.check(av, 9);
- return target.<Object>invokeExact(
+ return target.invokeExact(
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5), super.select(av,6), super.select(av,7),
super.select(av,8)); }
@@ -635,42 +635,42 @@
protected S10(SpreadGeneric outer, MethodHandle t) { super(outer, t); }
protected S10 makeInstance(SpreadGeneric outer, MethodHandle t) { return new S10(outer, t); }
protected Object invoke_S0(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9, Object av) throws Throwable { av = super.check(av, 0);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9); }
+ return target.invokeExact(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9); }
protected Object invoke_S1(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object av) throws Throwable { av = super.check(av, 1);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6, a7, a8,
+ return target.invokeExact(a0, a1, a2, a3, a4, a5, a6, a7, a8,
super.select(av,0)); }
protected Object invoke_S2(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object av) throws Throwable { av = super.check(av, 2);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6, a7,
+ return target.invokeExact(a0, a1, a2, a3, a4, a5, a6, a7,
super.select(av,0), super.select(av,1)); }
protected Object invoke_S3(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object av) throws Throwable { av = super.check(av, 3);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5, a6,
+ return target.invokeExact(a0, a1, a2, a3, a4, a5, a6,
super.select(av,0), super.select(av,1), super.select(av,2)); }
protected Object invoke_S4(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object av) throws Throwable { av = super.check(av, 4);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4, a5,
+ return target.invokeExact(a0, a1, a2, a3, a4, a5,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3)); }
protected Object invoke_S5(Object a0, Object a1, Object a2, Object a3, Object a4, Object av) throws Throwable { av = super.check(av, 5);
- return target.<Object>invokeExact(a0, a1, a2, a3, a4,
+ return target.invokeExact(a0, a1, a2, a3, a4,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4)); }
protected Object invoke_S6(Object a0, Object a1, Object a2, Object a3, Object av) throws Throwable { av = super.check(av, 6);
- return target.<Object>invokeExact(a0, a1, a2, a3,
+ return target.invokeExact(a0, a1, a2, a3,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5)); }
protected Object invoke_S7(Object a0, Object a1, Object a2, Object av) throws Throwable { av = super.check(av, 7);
- return target.<Object>invokeExact(a0, a1, a2,
+ return target.invokeExact(a0, a1, a2,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5), super.select(av,6)); }
protected Object invoke_S8(Object a0, Object a1, Object av) throws Throwable { av = super.check(av, 8);
- return target.<Object>invokeExact(a0, a1,
+ return target.invokeExact(a0, a1,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5), super.select(av,6), super.select(av,7)); }
protected Object invoke_S9(Object a0, Object av) throws Throwable { av = super.check(av, 9);
- return target.<Object>invokeExact(a0,
+ return target.invokeExact(a0,
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5), super.select(av,6), super.select(av,7),
super.select(av,8)); }
protected Object invoke_S10(Object av) throws Throwable { av = super.check(av, 10);
- return target.<Object>invokeExact(
+ return target.invokeExact(
super.select(av,0), super.select(av,1), super.select(av,2), super.select(av,3),
super.select(av,4), super.select(av,5), super.select(av,6), super.select(av,7),
super.select(av,8), super.select(av,9)); }
--- a/jdk/src/share/classes/sun/dyn/ToGeneric.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/ToGeneric.java Tue Dec 21 18:45:45 2010 -0800
@@ -323,7 +323,7 @@
* via another method handle {@code convert}, which is responsible for
* converting the object result into the raw return value.
*/
- static abstract class Adapter extends JavaMethodHandle {
+ static abstract class Adapter extends BoundMethodHandle {
/*
* class X<<R,A...>> extends Adapter {
* Object...=>Object target;
@@ -337,13 +337,13 @@
@Override
public String toString() {
- return target == null ? "prototype:"+convert : target.toString();
+ return target == null ? "prototype:"+convert : MethodHandleImpl.addTypeString(target, this);
}
protected boolean isPrototype() { return target == null; }
/* Prototype constructor. */
protected Adapter(MethodHandle entryPoint) {
- super(entryPoint);
+ super(Access.TOKEN, entryPoint);
this.invoker = null;
this.convert = entryPoint;
this.target = null;
@@ -355,7 +355,7 @@
}
protected Adapter(MethodHandle entryPoint, MethodHandle invoker, MethodHandle convert, MethodHandle target) {
- super(entryPoint);
+ super(Access.TOKEN, entryPoint);
this.invoker = invoker;
this.convert = convert;
this.target = target;
@@ -367,33 +367,33 @@
// { return new ThisType(entryPoint, convert, target); }
// Code to run when the arguments (<= 4) have all been boxed.
- protected Object target() throws Throwable { return invoker.<Object>invokeExact(target); }
- protected Object target(Object a0) throws Throwable { return invoker.<Object>invokeExact(target, a0); }
+ protected Object target() throws Throwable { return invoker.invokeExact(target); }
+ protected Object target(Object a0) throws Throwable { return invoker.invokeExact(target, a0); }
protected Object target(Object a0, Object a1)
- throws Throwable { return invoker.<Object>invokeExact(target, a0, a1); }
+ throws Throwable { return invoker.invokeExact(target, a0, a1); }
protected Object target(Object a0, Object a1, Object a2)
- throws Throwable { return invoker.<Object>invokeExact(target, a0, a1, a2); }
+ throws Throwable { return invoker.invokeExact(target, a0, a1, a2); }
protected Object target(Object a0, Object a1, Object a2, Object a3)
- throws Throwable { return invoker.<Object>invokeExact(target, a0, a1, a2, a3); }
+ throws Throwable { return invoker.invokeExact(target, a0, a1, a2, a3); }
/*
- protected Object target_0(Object... av) throws Throwable { return invoker.<Object>invokeExact(target, av); }
+ protected Object target_0(Object... av) throws Throwable { return invoker.invokeExact(target, av); }
protected Object target_1(Object a0, Object... av)
- throws Throwable { return invoker.<Object>invokeExact(target, a0, (Object)av); }
+ throws Throwable { return invoker.invokeExact(target, a0, (Object)av); }
protected Object target_2(Object a0, Object a1, Object... av)
- throws Throwable { return invoker.<Object>invokeExact(target, a0, a1, (Object)av); }
+ throws Throwable { return invoker.invokeExact(target, a0, a1, (Object)av); }
protected Object target_3(Object a0, Object a1, Object a2, Object... av)
- throws Throwable { return invoker.<Object>invokeExact(target, a0, a1, a2, (Object)av); }
+ throws Throwable { return invoker.invokeExact(target, a0, a1, a2, (Object)av); }
protected Object target_4(Object a0, Object a1, Object a2, Object a3, Object... av)
- throws Throwable { return invoker.<Object>invokeExact(target, a0, a1, a2, a3, (Object)av); }
+ throws Throwable { return invoker.invokeExact(target, a0, a1, a2, a3, (Object)av); }
// */
// (For more than 4 arguments, generate the code in the adapter itself.)
// Code to run when the generic target has finished and produced a value.
- protected Object return_L(Object res) throws Throwable { return convert.<Object>invokeExact(res); }
- protected int return_I(Object res) throws Throwable { return convert.<int >invokeExact(res); }
- protected long return_J(Object res) throws Throwable { return convert.<long >invokeExact(res); }
- protected float return_F(Object res) throws Throwable { return convert.<float >invokeExact(res); }
- protected double return_D(Object res) throws Throwable { return convert.<double>invokeExact(res); }
+ protected Object return_L(Object res) throws Throwable { return (Object)convert.invokeExact(res); }
+ protected int return_I(Object res) throws Throwable { return (int) convert.invokeExact(res); }
+ protected long return_J(Object res) throws Throwable { return (long) convert.invokeExact(res); }
+ protected float return_F(Object res) throws Throwable { return (float) convert.invokeExact(res); }
+ protected double return_D(Object res) throws Throwable { return (double)convert.invokeExact(res); }
static private final String CLASS_PREFIX; // "sun.dyn.ToGeneric$"
static {
@@ -420,7 +420,7 @@
protected A1(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
protected A1(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { super(e, i, c, t); }
protected A1 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { return new A1(e, i, c, t); }
- protected Object target(Object a0) throws Throwable { return invoker.<Object>invokeExact(target, a0); }
+ protected Object target(Object a0) throws Throwable { return invoker.invokeExact(target, a0); }
protected Object targetA1(Object a0) throws Throwable { return target(a0); }
protected Object targetA1(int a0) throws Throwable { return target(a0); }
protected Object targetA1(long a0) throws Throwable { return target(a0); }
@@ -458,7 +458,7 @@
" protected @cat@(MethodHandle entryPoint) { super(entryPoint); } // to build prototype",
" protected @cat@(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { super(e, i, c, t); }",
" protected @cat@ makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { return new @cat@(e, i, c, t); }",
- " protected Object target(@Ovav@) throws Throwable { return invoker.<Object>invokeExact(target, @av@); }",
+ " protected Object target(@Ovav@) throws Throwable { return invoker.invokeExact(target, @av@); }",
" //@each-Tv@",
" protected Object target@cat@(@Tvav@) throws Throwable { return target(@av@); }",
" //@end-Tv@",
@@ -618,7 +618,7 @@
protected A0(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
protected A0(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { super(e, i, c, t); }
protected A0 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { return new A0(e, i, c, t); }
- protected Object target() throws Throwable { return invoker.<Object>invokeExact(target); }
+ protected Object target() throws Throwable { return invoker.invokeExact(target); }
protected Object targetA0() throws Throwable { return target(); }
protected Object invoke_L() throws Throwable { return return_L(targetA0()); }
protected int invoke_I() throws Throwable { return return_I(targetA0()); }
@@ -630,7 +630,7 @@
protected A1(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
protected A1(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { super(e, i, c, t); }
protected A1 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { return new A1(e, i, c, t); }
- protected Object target(Object a0) throws Throwable { return invoker.<Object>invokeExact(target, a0); }
+ protected Object target(Object a0) throws Throwable { return invoker.invokeExact(target, a0); }
protected Object targetA1(Object a0) throws Throwable { return target(a0); }
protected Object targetA1(int a0) throws Throwable { return target(a0); }
protected Object targetA1(long a0) throws Throwable { return target(a0); }
@@ -654,7 +654,7 @@
protected A2(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
protected A2(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { super(e, i, c, t); }
protected A2 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { return new A2(e, i, c, t); }
- protected Object target(Object a0, Object a1) throws Throwable { return invoker.<Object>invokeExact(target, a0, a1); }
+ protected Object target(Object a0, Object a1) throws Throwable { return invoker.invokeExact(target, a0, a1); }
protected Object targetA2(Object a0, Object a1) throws Throwable { return target(a0, a1); }
protected Object targetA2(Object a0, int a1) throws Throwable { return target(a0, a1); }
protected Object targetA2(int a0, int a1) throws Throwable { return target(a0, a1); }
@@ -690,7 +690,7 @@
protected A3(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
protected A3(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { super(e, i, c, t); }
protected A3 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { return new A3(e, i, c, t); }
- protected Object target(Object a0, Object a1, Object a2) throws Throwable { return invoker.<Object>invokeExact(target, a0, a1, a2); }
+ protected Object target(Object a0, Object a1, Object a2) throws Throwable { return invoker.invokeExact(target, a0, a1, a2); }
protected Object targetA3(Object a0, Object a1, Object a2) throws Throwable { return target(a0, a1, a2); }
protected Object targetA3(Object a0, Object a1, int a2) throws Throwable { return target(a0, a1, a2); }
protected Object targetA3(Object a0, int a1, int a2) throws Throwable { return target(a0, a1, a2); }
@@ -739,7 +739,7 @@
protected A4(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
protected A4(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { super(e, i, c, t); }
protected A4 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { return new A4(e, i, c, t); }
- protected Object target(Object a0, Object a1, Object a2, Object a3) throws Throwable { return invoker.<Object>invokeExact(target, a0, a1, a2, a3); }
+ protected Object target(Object a0, Object a1, Object a2, Object a3) throws Throwable { return invoker.invokeExact(target, a0, a1, a2, a3); }
protected Object targetA4(Object a0, Object a1, Object a2, Object a3) throws Throwable { return target(a0, a1, a2, a3); }
protected Object targetA4(Object a0, Object a1, Object a2, int a3) throws Throwable { return target(a0, a1, a2, a3); }
protected Object targetA4(Object a0, Object a1, int a2, int a3) throws Throwable { return target(a0, a1, a2, a3); }
@@ -781,7 +781,7 @@
protected A5(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
protected A5(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { super(e, i, c, t); }
protected A5 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { return new A5(e, i, c, t); }
- protected Object target(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return invoker.<Object>invokeExact(target, a0, a1, a2, a3, a4); }
+ protected Object target(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return invoker.invokeExact(target, a0, a1, a2, a3, a4); }
protected Object targetA5(Object a0, Object a1, Object a2, Object a3, Object a4) throws Throwable { return target(a0, a1, a2, a3, a4); }
protected Object targetA5(Object a0, Object a1, Object a2, Object a3, int a4) throws Throwable { return target(a0, a1, a2, a3, a4); }
protected Object targetA5(Object a0, Object a1, Object a2, int a3, int a4) throws Throwable { return target(a0, a1, a2, a3, a4); }
@@ -832,7 +832,7 @@
protected A6(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
protected A6(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { super(e, i, c, t); }
protected A6 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { return new A6(e, i, c, t); }
- protected Object target(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return invoker.<Object>invokeExact(target, a0, a1, a2, a3, a4, a5); }
+ protected Object target(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return invoker.invokeExact(target, a0, a1, a2, a3, a4, a5); }
protected Object targetA6(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5) throws Throwable { return target(a0, a1, a2, a3, a4, a5); }
protected Object targetA6(Object a0, Object a1, Object a2, Object a3, Object a4, long a5) throws Throwable { return target(a0, a1, a2, a3, a4, a5); }
protected Object targetA6(Object a0, Object a1, Object a2, Object a3, long a4, long a5) throws Throwable { return target(a0, a1, a2, a3, a4, a5); }
@@ -866,7 +866,7 @@
protected A7(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
protected A7(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { super(e, i, c, t); }
protected A7 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { return new A7(e, i, c, t); }
- protected Object target(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return invoker.<Object>invokeExact(target, a0, a1, a2, a3, a4, a5, a6); }
+ protected Object target(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6); }
protected Object targetA7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6) throws Throwable { return target(a0, a1, a2, a3, a4, a5, a6); }
protected Object targetA7(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, long a6) throws Throwable { return target(a0, a1, a2, a3, a4, a5, a6); }
protected Object targetA7(Object a0, Object a1, Object a2, Object a3, Object a4, long a5, long a6) throws Throwable { return target(a0, a1, a2, a3, a4, a5, a6); }
@@ -904,7 +904,7 @@
protected A8(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
protected A8(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { super(e, i, c, t); }
protected A8 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { return new A8(e, i, c, t); }
- protected Object target(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return invoker.<Object>invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7); }
+ protected Object target(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7); }
protected Object targetA8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7) throws Throwable { return target(a0, a1, a2, a3, a4, a5, a6, a7); }
protected Object targetA8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, long a7) throws Throwable { return target(a0, a1, a2, a3, a4, a5, a6, a7); }
protected Object targetA8(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, long a6, long a7) throws Throwable { return target(a0, a1, a2, a3, a4, a5, a6, a7); }
@@ -946,7 +946,7 @@
protected A9(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
protected A9(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { super(e, i, c, t); }
protected A9 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { return new A9(e, i, c, t); }
- protected Object target(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return invoker.<Object>invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8); }
+ protected Object target(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8); }
protected Object targetA9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8) throws Throwable { return target(a0, a1, a2, a3, a4, a5, a6, a7, a8); }
protected Object targetA9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, long a8) throws Throwable { return target(a0, a1, a2, a3, a4, a5, a6, a7, a8); }
protected Object targetA9(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, long a7, long a8) throws Throwable { return target(a0, a1, a2, a3, a4, a5, a6, a7, a8); }
@@ -992,7 +992,7 @@
protected A10(MethodHandle entryPoint) { super(entryPoint); } // to build prototype
protected A10(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { super(e, i, c, t); }
protected A10 makeInstance(MethodHandle e, MethodHandle i, MethodHandle c, MethodHandle t) { return new A10(e, i, c, t); }
- protected Object target(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return invoker.<Object>invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9); }
+ protected Object target(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return invoker.invokeExact(target, a0, a1, a2, a3, a4, a5, a6, a7, a8, a9); }
protected Object targetA10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, Object a9) throws Throwable { return target(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9); }
protected Object targetA10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, Object a8, long a9) throws Throwable { return target(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9); }
protected Object targetA10(Object a0, Object a1, Object a2, Object a3, Object a4, Object a5, Object a6, Object a7, long a8, long a9) throws Throwable { return target(a0, a1, a2, a3, a4, a5, a6, a7, a8, a9); }
--- a/jdk/src/share/classes/sun/dyn/util/ValueConversions.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/util/ValueConversions.java Tue Dec 21 18:45:45 2010 -0800
@@ -377,7 +377,7 @@
REBOX_CONVERSIONS = newWrapperCaches(2);
/**
- * Becase we normalize primitive types to reduce the number of signatures,
+ * Because we normalize primitive types to reduce the number of signatures,
* primitives are sometimes manipulated under an "erased" type,
* either int (for types other than long/double) or long (for all types).
* When the erased primitive value is then boxed into an Integer or Long,
@@ -475,10 +475,10 @@
}
private static final EnumMap<Wrapper, MethodHandle>[]
- ZERO_CONSTANT_FUNCTIONS = newWrapperCaches(1);
+ CONSTANT_FUNCTIONS = newWrapperCaches(2);
public static MethodHandle zeroConstantFunction(Wrapper wrap) {
- EnumMap<Wrapper, MethodHandle> cache = ZERO_CONSTANT_FUNCTIONS[0];
+ EnumMap<Wrapper, MethodHandle> cache = CONSTANT_FUNCTIONS[0];
MethodHandle mh = cache.get(wrap);
if (mh != null) {
return mh;
@@ -544,6 +544,24 @@
}
/**
+ * Identity function on ints.
+ * @param x an arbitrary int value
+ * @return the same value x
+ */
+ static int identity(int x) {
+ return x;
+ }
+
+ /**
+ * Identity function on longs.
+ * @param x an arbitrary long value
+ * @return the same value x
+ */
+ static long identity(long x) {
+ return x;
+ }
+
+ /**
* Identity function, with reference cast.
* @param t an arbitrary reference type
* @param x an arbitrary reference value
@@ -553,7 +571,7 @@
return t.cast(x);
}
- private static final MethodHandle IDENTITY, CAST_REFERENCE, ALWAYS_NULL, ALWAYS_ZERO, ZERO_OBJECT, IGNORE, EMPTY;
+ private static final MethodHandle IDENTITY, IDENTITY_I, IDENTITY_J, CAST_REFERENCE, ALWAYS_NULL, ALWAYS_ZERO, ZERO_OBJECT, IGNORE, EMPTY;
static {
try {
MethodType idType = MethodType.genericMethodType(1);
@@ -562,6 +580,8 @@
MethodType ignoreType = idType.changeReturnType(void.class);
MethodType zeroObjectType = MethodType.genericMethodType(0);
IDENTITY = IMPL_LOOKUP.findStatic(ValueConversions.class, "identity", idType);
+ IDENTITY_I = IMPL_LOOKUP.findStatic(ValueConversions.class, "identity", MethodType.methodType(int.class, int.class));
+ IDENTITY_J = IMPL_LOOKUP.findStatic(ValueConversions.class, "identity", MethodType.methodType(long.class, long.class));
//CAST_REFERENCE = IMPL_LOOKUP.findVirtual(Class.class, "cast", idType);
CAST_REFERENCE = IMPL_LOOKUP.findStatic(ValueConversions.class, "castReference", castType);
ALWAYS_NULL = IMPL_LOOKUP.findStatic(ValueConversions.class, "alwaysNull", idType);
@@ -613,8 +633,53 @@
return IDENTITY;
}
+ public static MethodHandle identity(Class<?> type) {
+ if (type == Object.class)
+ return IDENTITY;
+ else if (!type.isPrimitive())
+ return retype(MethodType.methodType(type, type), IDENTITY);
+ else
+ return identity(Wrapper.forPrimitiveType(type));
+ }
+
+ static MethodHandle identity(Wrapper wrap) {
+ EnumMap<Wrapper, MethodHandle> cache = CONSTANT_FUNCTIONS[1];
+ MethodHandle mh = cache.get(wrap);
+ if (mh != null) {
+ return mh;
+ }
+ // slow path
+ MethodType type = MethodType.methodType(wrap.primitiveType());
+ if (wrap != Wrapper.VOID)
+ type = type.appendParameterTypes(wrap.primitiveType());
+ try {
+ mh = IMPL_LOOKUP.findStatic(ValueConversions.class, "identity", type);
+ } catch (NoAccessException ex) {
+ mh = null;
+ }
+ if (mh == null && wrap == Wrapper.VOID) {
+ mh = EMPTY; // #(){} : #()void
+ }
+ if (mh != null) {
+ cache.put(wrap, mh);
+ return mh;
+ }
+
+ // use a raw conversion
+ if (wrap.isSingleWord() && wrap != Wrapper.INT) {
+ mh = retype(type, identity(Wrapper.INT));
+ } else if (wrap.isDoubleWord() && wrap != Wrapper.LONG) {
+ mh = retype(type, identity(Wrapper.LONG));
+ }
+ if (mh != null) {
+ cache.put(wrap, mh);
+ return mh;
+ }
+ throw new IllegalArgumentException("cannot find identity for " + wrap);
+ }
+
private static MethodHandle retype(MethodType type, MethodHandle mh) {
- return AdapterMethodHandle.makeRetypeOnly(IMPL_TOKEN, type, mh);
+ return AdapterMethodHandle.makeRetypeRaw(IMPL_TOKEN, type, mh);
}
private static final Object[] NO_ARGS_ARRAY = {};
--- a/jdk/src/share/classes/sun/dyn/util/VerifyAccess.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/util/VerifyAccess.java Tue Dec 21 18:45:45 2010 -0800
@@ -25,7 +25,6 @@
package sun.dyn.util;
-import java.dyn.LinkagePermission;
import java.dyn.NoAccessException;
import java.lang.reflect.Modifier;
import sun.dyn.MemberName;
@@ -43,6 +42,7 @@
private static final int PACKAGE_ONLY = 0;
private static final int ALL_ACCESS_MODES = (PUBLIC|PRIVATE|PROTECTED|PACKAGE_ONLY);
+ private static final boolean ALLOW_NESTMATE_ACCESS = false;
/**
* Evaluate the JVM linkage rules for access to the given method
@@ -102,6 +102,8 @@
// a superclass of the lookup class.
}
}
+ if (defc == lookupClass)
+ return true; // easy check; all self-access is OK
switch (mods & ALL_ACCESS_MODES) {
case PUBLIC:
if (refc != defc) return true; // already checked above
@@ -112,7 +114,8 @@
return isSamePackage(defc, lookupClass);
case PRIVATE:
// Loosened rules for privates follows access rules for inner classes.
- return isSamePackageMember(defc, lookupClass);
+ return (ALLOW_NESTMATE_ACCESS &&
+ isSamePackageMember(defc, lookupClass));
default:
throw new IllegalArgumentException("bad modifiers: "+Modifier.toString(mods));
}
@@ -206,24 +209,4 @@
}
return false;
}
-
- /**
- * Ensure the requesting class have privileges to perform invokedynamic
- * linkage operations on subjectClass. True if requestingClass is
- * Access.class (meaning the request originates from the JVM) or if the
- * classes are in the same package and have consistent class loaders.
- * (The subject class loader must be identical with or be a child of
- * the requesting class loader.)
- * @param requestingClass
- * @param subjectClass
- */
- public static void checkBootstrapPrivilege(Class requestingClass, Class subjectClass,
- String permissionName) {
- if (requestingClass == null) return;
- if (requestingClass == subjectClass) return;
- SecurityManager security = System.getSecurityManager();
- if (security == null) return; // open season
- if (isSamePackage(requestingClass, subjectClass)) return;
- security.checkPermission(new LinkagePermission(permissionName, requestingClass));
- }
}
--- a/jdk/src/share/classes/sun/dyn/util/Wrapper.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/src/share/classes/sun/dyn/util/Wrapper.java Tue Dec 21 18:45:45 2010 -0800
@@ -26,17 +26,19 @@
package sun.dyn.util;
public enum Wrapper {
- INT(Integer.class, int.class, 'I', (Integer)(int)0, Format.signed(32)),
- LONG(Long.class, long.class, 'J', (Long)(long)0, Format.signed(64)),
+ BOOLEAN(Boolean.class, boolean.class, 'Z', (Boolean)false, Format.unsigned(1)),
+ // These must be in the order defined for widening primitive conversions in JLS 5.1.2
BYTE(Byte.class, byte.class, 'B', (Byte)(byte)0, Format.signed(8)),
SHORT(Short.class, short.class, 'S', (Short)(short)0, Format.signed(16)),
CHAR(Character.class, char.class, 'C', (Character)(char)0, Format.unsigned(16)),
- BOOLEAN(Boolean.class, boolean.class, 'Z', (Boolean)false, Format.unsigned(1)),
+ INT(Integer.class, int.class, 'I', (Integer)(int)0, Format.signed(32)),
+ LONG(Long.class, long.class, 'J', (Long)(long)0, Format.signed(64)),
FLOAT(Float.class, float.class, 'F', (Float)(float)0, Format.floating(32)),
DOUBLE(Double.class, double.class, 'D', (Double)(double)0, Format.floating(64)),
- VOID(Void.class, void.class, 'V', null, Format.other(0)),
//NULL(Null.class, null.class, 'N', null, Format.other(1)),
OBJECT(Object.class, Object.class, 'L', null, Format.other(1)),
+ // VOID must be the last type, since it is "assignable" from any other type:
+ VOID(Void.class, void.class, 'V', null, Format.other(0)),
;
private final Class<?> wrapperType;
@@ -76,9 +78,11 @@
false);
return kind | (size << SIZE_SHIFT) | (slots << SLOT_SHIFT);
}
- static int
+ static final int
INT = SIGNED | (32 << SIZE_SHIFT) | (1 << SLOT_SHIFT),
+ SHORT = SIGNED | (16 << SIZE_SHIFT) | (1 << SLOT_SHIFT),
BOOLEAN = UNSIGNED | (1 << SIZE_SHIFT) | (1 << SLOT_SHIFT),
+ CHAR = UNSIGNED | (16 << SIZE_SHIFT) | (1 << SLOT_SHIFT),
FLOAT = FLOATING | (32 << SIZE_SHIFT) | (1 << SLOT_SHIFT),
VOID = UNSIGNED | (0 << SIZE_SHIFT) | (0 << SLOT_SHIFT),
NUM_MASK = (-1) << SIZE_SHIFT;
@@ -111,6 +115,29 @@
/** Is the wrapped type either float or double? */
public boolean isFloating() { return format >= Format.FLOAT; }
+ /** Does the JVM verifier allow a variable of this wrapper's
+ * primitive type to be assigned from a value of the given wrapper's primitive type?
+ * Cases:
+ * <ul>
+ * <li>unboxing followed by widening primitive conversion
+ * <li>any type converted to {@code void}
+ * <li>boxing conversion followed by widening reference conversion to {@code Object}
+ * <li>conversion of {@code boolean} to any type
+ * </ul>
+ */
+ public boolean isConvertibleFrom(Wrapper source) {
+ if (this == source) return true;
+ if (this.compareTo(source) < 0) {
+ // At best, this is a narrowing conversion.
+ return false;
+ }
+ if ((this.format ^ source.format) == (Format.SHORT ^ Format.CHAR)) {
+ assert (this == SHORT && source == CHAR) || (this == CHAR && source == SHORT);
+ return false;
+ }
+ return true;
+ }
+
/** Produce a zero value for the given wrapper type.
* This will be a numeric zero for a number or character,
* false for a boolean, and null for a reference or void.
@@ -122,10 +149,10 @@
public Object zero() { return zero; }
/** Produce a zero value for the given wrapper type T.
- * The optinoal argument must a type compatible with this wrapper.
+ * The optional argument must a type compatible with this wrapper.
* Equivalent to {@code this.cast(this.zero(), type)}.
*/
- public <T> T zero(Class<T> type) { return cast(zero, type); }
+ public <T> T zero(Class<T> type) { return convert(zero, type); }
// /** Produce a wrapper for the given wrapper or primitive type. */
// public static Wrapper valueOf(Class<?> type) {
@@ -264,7 +291,11 @@
exampleType.isInterface()) {
return forceType(wrapperType, exampleType);
}
- throw new ClassCastException(exampleType + " not <:" + wrapperType);
+ throw newClassCastException(exampleType, primitiveType);
+ }
+
+ private static ClassCastException newClassCastException(Class<?> actual, Class<?> expected) {
+ return new ClassCastException(actual + " is not compatible with " + expected);
}
/** If {@code type} is a primitive type, return the corresponding
@@ -325,17 +356,55 @@
// }
/** Cast a wrapped value to the given type, which may be either a primitive or wrapper type.
+ * The given target type must be this wrapper's primitive or wrapper type.
+ * If this wrapper is OBJECT, the target type may also be an interface, perform no runtime check.
* Performs standard primitive conversions, including truncation and float conversions.
* The given type must be compatible with this wrapper. That is, it must either
* be the wrapper type (or a subtype, in the case of {@code OBJECT}) or else
* it must be the wrapper's primitive type.
+ * Primitive conversions are only performed if the given type is itself a primitive.
* @throws ClassCastException if the given type is not compatible with this wrapper
*/
public <T> T cast(Object x, Class<T> type) {
+ return convert(x, type, true);
+ }
+
+ /** Convert a wrapped value to the given type.
+ * The given target type must be this wrapper's primitive or wrapper type.
+ * This is equivalent to {@link #cast}, except that it refuses to perform
+ * narrowing primitive conversions.
+ */
+ public <T> T convert(Object x, Class<T> type) {
+ return convert(x, type, false);
+ }
+
+ private <T> T convert(Object x, Class<T> type, boolean isCast) {
+ if (this == OBJECT) {
+ // If the target wrapper is OBJECT, just do a reference cast.
+ // If the target type is an interface, perform no runtime check.
+ // (This loophole is safe, and is allowed by the JVM verifier.)
+ // If the target type is a primitive, change it to a wrapper.
+ @SuppressWarnings("unchecked")
+ T result = (T) x; // unchecked warning is expected here
+ return result;
+ }
Class<T> wtype = wrapperType(type);
- if (wtype.isInstance(x))
- return wtype.cast(x);
- return wtype.cast(wrap(x));
+ if (wtype.isInstance(x)) {
+ @SuppressWarnings("unchecked")
+ T result = (T) x; // unchecked warning is expected here
+ return result;
+ }
+ Class<?> sourceType = x.getClass(); // throw NPE if x is null
+ if (!isCast) {
+ Wrapper source = findWrapperType(sourceType);
+ if (source == null || !this.isConvertibleFrom(source)) {
+ throw newClassCastException(wtype, sourceType);
+ }
+ }
+ @SuppressWarnings("unchecked")
+ T result = (T) wrap(x); // unchecked warning is expected here
+ assert result.getClass() == wtype;
+ return result;
}
/** Cast a reference type to another reference type.
--- a/jdk/test/java/dyn/ClassValueTest.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/test/java/dyn/ClassValueTest.java Tue Dec 21 18:45:45 2010 -0800
@@ -53,12 +53,13 @@
return "CV1:" + type.getName();
}
static int countForCV1;
- static final ClassValue<String> CV1 = new ClassValue<String>() {
+ static final ClassValue<String> CV1 = new CV1();
+ private static class CV1 extends ClassValue<String> {
protected String computeValue(Class<?> type) {
countForCV1++;
return nameForCV1(type);
}
- };
+ }
static final Class[] CLASSES = {
String.class,
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/dyn/InvokeDynamicPrintArgs.java Tue Dec 21 18:45:45 2010 -0800
@@ -0,0 +1,172 @@
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/* @test
+ * @summary smoke test for invokedynamic instructions
+ * @library indify
+ * @compile InvokeDynamicPrintArgs.java
+ * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableInvokeDynamic
+ * indify.Indify
+ * --verify-specifier-count=3 --transitionalJSR292=false
+ * --expand-properties --classpath ${test.classes}
+ * --java InvokeDynamicPrintArgs --check-output
+ */
+
+import java.util.*;
+import java.io.*;
+
+import java.dyn.*;
+import static java.dyn.MethodHandles.*;
+import static java.dyn.MethodType.*;
+
+public class InvokeDynamicPrintArgs {
+ public static void main(String... av) throws Throwable {
+ if (av.length > 0) openBuf(); // --check-output mode
+ System.out.println("Printing some argument lists, starting with a empty one:");
+ INDY_nothing().invokeExact(); // BSM specifier #0 = {bsm}
+ INDY_bar().invokeExact("bar arg", 1); // BSM specifier #1 = {bsm2, Void.class, "void type"}
+ INDY_bar2().invokeExact("bar2 arg", 222); // BSM specifier #1 = (same)
+ INDY_baz().invokeExact("baz arg", 2, 3.14); // BSM specifier #2 = {bsm2, 1234.5}
+ INDY_foo().invokeExact("foo arg"); // BSM specifier #0 = (same)
+ // Hence, BSM specifier count should be 3. See "--verify-specifier-count=3" above.
+ System.out.println("Done printing argument lists.");
+ closeBuf();
+ }
+
+ private static PrintStream oldOut;
+ private static ByteArrayOutputStream buf;
+ private static void openBuf() {
+ oldOut = System.out;
+ buf = new ByteArrayOutputStream();
+ System.setOut(new PrintStream(buf));
+ }
+ private static void closeBuf() {
+ if (buf == null) return;
+ System.out.flush();
+ System.setOut(oldOut);
+ String[] haveLines = new String(buf.toByteArray()).split("[\n\r]+");
+ for (String line : haveLines) System.out.println(line);
+ Iterator<String> iter = Arrays.asList(haveLines).iterator();
+ for (String want : EXPECT_OUTPUT) {
+ String have = iter.hasNext() ? iter.next() : "[EOF]";
+ if (want.equals(have)) continue;
+ System.err.println("want line: "+want);
+ System.err.println("have line: "+have);
+ throw new AssertionError("unexpected output: "+have);
+ }
+ if (iter.hasNext())
+ throw new AssertionError("unexpected output: "+iter.next());
+ }
+ private static final String[] EXPECT_OUTPUT = {
+ "Printing some argument lists, starting with a empty one:",
+ "[InvokeDynamicPrintArgs, nothing, ()void][]",
+ "[InvokeDynamicPrintArgs, bar, (java.lang.String,int)void, class java.lang.Void, void type!, 1, 234.5, 67.5, 89][bar arg, 1]",
+ "[InvokeDynamicPrintArgs, bar2, (java.lang.String,int)void, class java.lang.Void, void type!, 1, 234.5, 67.5, 89][bar2 arg, 222]",
+ "[InvokeDynamicPrintArgs, baz, (java.lang.String,int,double)void, 1234.5][baz arg, 2, 3.14]",
+ "[InvokeDynamicPrintArgs, foo, (java.lang.String)void][foo arg]",
+ "Done printing argument lists."
+ };
+
+ private static void printArgs(Object bsmInfo, Object... args) {
+ System.out.println(bsmInfo+Arrays.deepToString(args));
+ }
+ private static MethodHandle MH_printArgs() throws ReflectiveOperationException {
+ shouldNotCallThis();
+ return lookup().findStatic(lookup().lookupClass(),
+ "printArgs", methodType(void.class, Object.class, Object[].class));
+ }
+
+ private static CallSite bsm(Lookup caller, String name, MethodType type) throws ReflectiveOperationException {
+ // ignore caller and name, but match the type:
+ Object bsmInfo = Arrays.asList(caller, name, type);
+ return new ConstantCallSite(MH_printArgs().bindTo(bsmInfo).asCollector(Object[].class, type.parameterCount()).asType(type));
+ }
+ private static MethodType MT_bsm() {
+ shouldNotCallThis();
+ return methodType(CallSite.class, Lookup.class, String.class, MethodType.class);
+ }
+ private static MethodHandle MH_bsm() throws ReflectiveOperationException {
+ shouldNotCallThis();
+ return lookup().findStatic(lookup().lookupClass(), "bsm", MT_bsm());
+ }
+
+ private static CallSite bsm2(Lookup caller, String name, MethodType type, Object arg) throws ReflectiveOperationException {
+ // ignore caller and name, but match the type:
+ List<Object> bsmInfo = new ArrayList<>(Arrays.asList(caller, name, type));
+ if (arg instanceof Object[])
+ bsmInfo.addAll(Arrays.asList((Object[])arg));
+ else
+ bsmInfo.add(arg);
+ return new ConstantCallSite(MH_printArgs().bindTo(bsmInfo).asCollector(Object[].class, type.parameterCount()).asType(type));
+ }
+ private static MethodType MT_bsm2() {
+ shouldNotCallThis();
+ return methodType(CallSite.class, Lookup.class, String.class, MethodType.class, Object.class);
+ }
+ private static MethodHandle MH_bsm2() throws ReflectiveOperationException {
+ shouldNotCallThis();
+ return lookup().findStatic(lookup().lookupClass(), "bsm2", MT_bsm2());
+ }
+
+ private static MethodHandle INDY_nothing() throws Throwable {
+ shouldNotCallThis();
+ return ((CallSite) MH_bsm().invokeGeneric(lookup(),
+ "nothing", methodType(void.class)
+ )).dynamicInvoker();
+ }
+ private static MethodHandle INDY_foo() throws Throwable {
+ shouldNotCallThis();
+ return ((CallSite) MH_bsm().invokeGeneric(lookup(),
+ "foo", methodType(void.class, String.class)
+ )).dynamicInvoker();
+ }
+ private static MethodHandle INDY_bar() throws Throwable {
+ shouldNotCallThis();
+ return ((CallSite) MH_bsm2().invokeGeneric(lookup(),
+ "bar", methodType(void.class, String.class, int.class)
+ , new Object[] { Void.class, "void type!",
+ 1, 234.5F, 67.5, (long)89 }
+ )).dynamicInvoker();
+ }
+ private static MethodHandle INDY_bar2() throws Throwable {
+ shouldNotCallThis();
+ return ((CallSite) MH_bsm2().invokeGeneric(lookup(),
+ "bar2", methodType(void.class, String.class, int.class)
+ , new Object[] { Void.class, "void type!",
+ 1, 234.5F, 67.5, (long)89 }
+ )).dynamicInvoker();
+ }
+ private static MethodHandle INDY_baz() throws Throwable {
+ shouldNotCallThis();
+ return ((CallSite) MH_bsm2().invokeGeneric(lookup(),
+ "baz", methodType(void.class, String.class, int.class, double.class)
+ , 1234.5
+ )).dynamicInvoker();
+ }
+
+ private static void shouldNotCallThis() {
+ // if this gets called, the transformation has not taken place
+ if (System.getProperty("InvokeDynamicPrintArgs.allow-untransformed") != null) return;
+ throw new AssertionError("this code should be statically transformed away by Indify");
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/dyn/InvokeGenericTest.java Tue Dec 21 18:45:45 2010 -0800
@@ -0,0 +1,484 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/* @test
+ * @summary unit tests for java.dyn.MethodHandle.invokeGeneric
+ * @compile -XDallowTransitionalJSR292=no -target 7 InvokeGenericTest.java
+ * @run junit/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles test.java.dyn.InvokeGenericTest
+ */
+
+package test.java.dyn;
+
+import java.dyn.*;
+import static java.dyn.MethodHandles.*;
+import static java.dyn.MethodType.*;
+import java.lang.reflect.*;
+import java.util.*;
+import org.junit.*;
+import static org.junit.Assert.*;
+import static org.junit.Assume.*;
+
+
+/**
+ *
+ * @author jrose
+ */
+public class InvokeGenericTest {
+ // How much output?
+ static int verbosity = 0;
+ static {
+ String vstr = System.getProperty("test.java.dyn.InvokeGenericTest.verbosity");
+ if (vstr != null) verbosity = Integer.parseInt(vstr);
+ }
+
+ @Test
+ public void testFirst() throws Throwable {
+ verbosity += 9; try {
+ // left blank for debugging
+ } finally { printCounts(); verbosity -= 9; }
+ }
+
+ public InvokeGenericTest() {
+ }
+
+ @Before
+ public void checkImplementedPlatform() {
+ boolean platformOK = false;
+ Properties properties = System.getProperties();
+ String vers = properties.getProperty("java.vm.version");
+ String name = properties.getProperty("java.vm.name");
+ String arch = properties.getProperty("os.arch");
+ if ((arch.equals("amd64") || arch.equals("i386") || arch.equals("x86") ||
+ arch.equals("sparc") || arch.equals("sparcv9")) &&
+ (name.contains("Client") || name.contains("Server"))
+ ) {
+ platformOK = true;
+ } else {
+ System.err.println("Skipping tests for unsupported platform: "+Arrays.asList(vers, name, arch));
+ }
+ assumeTrue(platformOK);
+ }
+
+ String testName;
+ static int allPosTests, allNegTests;
+ int posTests, negTests;
+ @After
+ public void printCounts() {
+ if (verbosity >= 2 && (posTests | negTests) != 0) {
+ System.out.println();
+ if (posTests != 0) System.out.println("=== "+testName+": "+posTests+" positive test cases run");
+ if (negTests != 0) System.out.println("=== "+testName+": "+negTests+" negative test cases run");
+ allPosTests += posTests;
+ allNegTests += negTests;
+ posTests = negTests = 0;
+ }
+ }
+ void countTest(boolean positive) {
+ if (positive) ++posTests;
+ else ++negTests;
+ }
+ void countTest() { countTest(true); }
+ void startTest(String name) {
+ if (testName != null) printCounts();
+ if (verbosity >= 1)
+ System.out.println(name);
+ posTests = negTests = 0;
+ testName = name;
+ }
+
+ @BeforeClass
+ public static void setUpClass() throws Exception {
+ calledLog.clear();
+ calledLog.add(null);
+ nextArgVal = INITIAL_ARG_VAL;
+ }
+
+ @AfterClass
+ public static void tearDownClass() throws Exception {
+ int posTests = allPosTests, negTests = allNegTests;
+ if (verbosity >= 2 && (posTests | negTests) != 0) {
+ System.out.println();
+ if (posTests != 0) System.out.println("=== "+posTests+" total positive test cases");
+ if (negTests != 0) System.out.println("=== "+negTests+" total negative test cases");
+ }
+ }
+
+ static List<Object> calledLog = new ArrayList<Object>();
+ static Object logEntry(String name, Object... args) {
+ return Arrays.asList(name, Arrays.asList(args));
+ }
+ static Object called(String name, Object... args) {
+ Object entry = logEntry(name, args);
+ calledLog.add(entry);
+ return entry;
+ }
+ static void assertCalled(String name, Object... args) {
+ Object expected = logEntry(name, args);
+ Object actual = calledLog.get(calledLog.size() - 1);
+ if (expected.equals(actual) && verbosity < 9) return;
+ System.out.println("assertCalled "+name+":");
+ System.out.println("expected: "+expected);
+ System.out.println("actual: "+actual);
+ System.out.println("ex. types: "+getClasses(expected));
+ System.out.println("act. types: "+getClasses(actual));
+ assertEquals("previous method call", expected, actual);
+ }
+ static void printCalled(MethodHandle target, String name, Object... args) {
+ if (verbosity >= 3)
+ System.out.println("calling MH="+target+" to "+name+Arrays.toString(args));
+ }
+
+ static Object castToWrapper(Object value, Class<?> dst) {
+ Object wrap = null;
+ if (value instanceof Number)
+ wrap = castToWrapperOrNull(((Number)value).longValue(), dst);
+ if (value instanceof Character)
+ wrap = castToWrapperOrNull((char)(Character)value, dst);
+ if (wrap != null) return wrap;
+ return dst.cast(value);
+ }
+
+ static Object castToWrapperOrNull(long value, Class<?> dst) {
+ if (dst == int.class || dst == Integer.class)
+ return (int)(value);
+ if (dst == long.class || dst == Long.class)
+ return (long)(value);
+ if (dst == char.class || dst == Character.class)
+ return (char)(value);
+ if (dst == short.class || dst == Short.class)
+ return (short)(value);
+ if (dst == float.class || dst == Float.class)
+ return (float)(value);
+ if (dst == double.class || dst == Double.class)
+ return (double)(value);
+ if (dst == byte.class || dst == Byte.class)
+ return (byte)(value);
+ if (dst == boolean.class || dst == boolean.class)
+ return ((value % 29) & 1) == 0;
+ return null;
+ }
+
+ static final int ONE_MILLION = (1000*1000), // first int value
+ TEN_BILLION = (10*1000*1000*1000), // scale factor to reach upper 32 bits
+ INITIAL_ARG_VAL = ONE_MILLION << 1; // <<1 makes space for sign bit;
+ static long nextArgVal;
+ static long nextArg(boolean moreBits) {
+ long val = nextArgVal++;
+ long sign = -(val & 1); // alternate signs
+ val >>= 1;
+ if (moreBits)
+ // Guarantee some bits in the high word.
+ // In any case keep the decimal representation simple-looking,
+ // with lots of zeroes, so as not to make the printed decimal
+ // strings unnecessarily noisy.
+ val += (val % ONE_MILLION) * TEN_BILLION;
+ return val ^ sign;
+ }
+ static int nextArg() {
+ // Produce a 32-bit result something like ONE_MILLION+(smallint).
+ // Example: 1_000_042.
+ return (int) nextArg(false);
+ }
+ static long nextArg(Class<?> kind) {
+ if (kind == long.class || kind == Long.class ||
+ kind == double.class || kind == Double.class)
+ // produce a 64-bit result something like
+ // ((TEN_BILLION+1) * (ONE_MILLION+(smallint)))
+ // Example: 10_000_420_001_000_042.
+ return nextArg(true);
+ return (long) nextArg();
+ }
+
+ static Object randomArg(Class<?> param) {
+ Object wrap = castToWrapperOrNull(nextArg(param), param);
+ if (wrap != null) {
+ return wrap;
+ }
+// import sun.dyn.util.Wrapper;
+// Wrapper wrap = Wrapper.forBasicType(dst);
+// if (wrap == Wrapper.OBJECT && Wrapper.isWrapperType(dst))
+// wrap = Wrapper.forWrapperType(dst);
+// if (wrap != Wrapper.OBJECT)
+// return wrap.wrap(nextArg++);
+ if (param.isInterface()) {
+ for (Class<?> c : param.getClasses()) {
+ if (param.isAssignableFrom(c) && !c.isInterface())
+ { param = c; break; }
+ }
+ }
+ if (param.isInterface() || param.isAssignableFrom(String.class))
+ return "#"+nextArg();
+ else
+ try {
+ return param.newInstance();
+ } catch (InstantiationException ex) {
+ } catch (IllegalAccessException ex) {
+ }
+ return null; // random class not Object, String, Integer, etc.
+ }
+ static Object[] randomArgs(Class<?>... params) {
+ Object[] args = new Object[params.length];
+ for (int i = 0; i < args.length; i++)
+ args[i] = randomArg(params[i]);
+ return args;
+ }
+ static Object[] randomArgs(int nargs, Class<?> param) {
+ Object[] args = new Object[nargs];
+ for (int i = 0; i < args.length; i++)
+ args[i] = randomArg(param);
+ return args;
+ }
+
+ static final Object ANON_OBJ = new Object();
+ static Object zeroArg(Class<?> param) {
+ Object x = castToWrapperOrNull(0L, param);
+ if (x != null) return x;
+ if (param.isInterface() || param.isAssignableFrom(String.class)) return "\"\"";
+ if (param == Object.class) return ANON_OBJ;
+ if (param.getComponentType() != null) return Array.newInstance(param.getComponentType(), 0);
+ return null;
+ }
+ static Object[] zeroArgs(Class<?>... params) {
+ Object[] args = new Object[params.length];
+ for (int i = 0; i < args.length; i++)
+ args[i] = zeroArg(params[i]);
+ return args;
+ }
+ static Object[] zeroArgs(List<Class<?>> params) {
+ return zeroArgs(params.toArray(new Class<?>[0]));
+ }
+
+ static <T, E extends T> T[] array(Class<T[]> atype, E... a) {
+ return Arrays.copyOf(a, a.length, atype);
+ }
+ static <T> T[] cat(T[] a, T... b) {
+ int alen = a.length, blen = b.length;
+ if (blen == 0) return a;
+ T[] c = Arrays.copyOf(a, alen + blen);
+ System.arraycopy(b, 0, c, alen, blen);
+ return c;
+ }
+ static Integer[] boxAll(int... vx) {
+ Integer[] res = new Integer[vx.length];
+ for (int i = 0; i < res.length; i++) {
+ res[i] = vx[i];
+ }
+ return res;
+ }
+ static Object getClasses(Object x) {
+ if (x == null) return x;
+ if (x instanceof String) return x; // keep the name
+ if (x instanceof List) {
+ // recursively report classes of the list elements
+ Object[] xa = ((List)x).toArray();
+ for (int i = 0; i < xa.length; i++)
+ xa[i] = getClasses(xa[i]);
+ return Arrays.asList(xa);
+ }
+ return x.getClass().getSimpleName();
+ }
+
+ static MethodHandle changeArgTypes(MethodHandle target, Class<?> argType) {
+ return changeArgTypes(target, 0, 999, argType);
+ }
+ static MethodHandle changeArgTypes(MethodHandle target,
+ int beg, int end, Class<?> argType) {
+ MethodType targetType = target.type();
+ end = Math.min(end, targetType.parameterCount());
+ ArrayList<Class<?>> argTypes = new ArrayList<Class<?>>(targetType.parameterList());
+ Collections.fill(argTypes.subList(beg, end), argType);
+ MethodType ttype2 = MethodType.methodType(targetType.returnType(), argTypes);
+ return MethodHandles.convertArguments(target, ttype2);
+ }
+
+ // This lookup is good for all members in and under InvokeGenericTest.
+ static final Lookup LOOKUP = MethodHandles.lookup();
+
+ Map<List<Class<?>>, MethodHandle> CALLABLES = new HashMap<List<Class<?>>, MethodHandle>();
+ MethodHandle callable(List<Class<?>> params) {
+ MethodHandle mh = CALLABLES.get(params);
+ if (mh == null) {
+ mh = collectArguments(collector_MH, methodType(Object.class, params));
+ CALLABLES.put(params, mh);
+ }
+ return mh;
+ }
+ MethodHandle callable(Class<?>... params) {
+ return callable(Arrays.asList(params));
+ }
+ private static Object collector(Object... args) {
+ return Arrays.asList(args);
+ }
+ private static final MethodHandle collector_MH;
+ static {
+ try {
+ collector_MH
+ = LOOKUP.findStatic(LOOKUP.lookupClass(),
+ "collector",
+ methodType(Object.class, Object[].class));
+ } catch (NoAccessException ex) {
+ throw new RuntimeException(ex);
+ }
+ }
+
+ @Test
+ public void testSimple() throws Throwable {
+ startTest("testSimple");
+ countTest();
+ String[] args = { "one", "two" };
+ MethodHandle mh = callable(Object.class, String.class);
+ Object res; List resl;
+ res = resl = (List) mh.invokeGeneric((String)args[0], (Object)args[1]);
+ //System.out.println(res);
+ assertEquals(Arrays.asList(args), res);
+ }
+
+ @Test
+ public void testWrongArgumentCount() throws Throwable {
+ startTest("testWrongArgumentCount");
+ for (int i = 0; i <= 10; i++) {
+ testWrongArgumentCount(Collections.<Class<?>>nCopies(i, Integer.class));
+ if (i <= 4) {
+ testWrongArgumentCount(Collections.<Class<?>>nCopies(i, int.class));
+ testWrongArgumentCount(Collections.<Class<?>>nCopies(i, long.class));
+ }
+ }
+ }
+ public void testWrongArgumentCount(List<Class<?>> params) throws Throwable {
+ int max = params.size();
+ for (int i = 0; i < max; i++) {
+ List<Class<?>> params2 = params.subList(0, i);
+ for (int k = 0; k <= 2; k++) {
+ if (k == 1) params = methodType(Object.class, params).generic().parameterList();
+ if (k == 2) params2 = methodType(Object.class, params2).generic().parameterList();
+ testWrongArgumentCount(params, params2);
+ testWrongArgumentCount(params2, params);
+ }
+ }
+ }
+ public void testWrongArgumentCount(List<Class<?>> expect, List<Class<?>> observe) throws Throwable {
+ countTest(false);
+ if (expect.equals(observe))
+ assert(false);
+ MethodHandle target = callable(expect);
+ Object[] args = zeroArgs(observe);
+ Object junk;
+ try {
+ switch (args.length) {
+ case 0:
+ junk = target.invokeGeneric(); break;
+ case 1:
+ junk = target.invokeGeneric(args[0]); break;
+ case 2:
+ junk = target.invokeGeneric(args[0], args[1]); break;
+ case 3:
+ junk = target.invokeGeneric(args[0], args[1], args[2]); break;
+ case 4:
+ junk = target.invokeGeneric(args[0], args[1], args[2], args[3]); break;
+ default:
+ junk = target.invokeWithArguments(args); break;
+ }
+ } catch (WrongMethodTypeException ex) {
+ return;
+ } catch (Exception ex) {
+ throw new RuntimeException("wrong exception calling "+target+target.type()+" on "+Arrays.asList(args)+" : "+ex);
+ }
+ throw new RuntimeException("bad success calling "+target+target.type()+" on "+Arrays.asList(args));
+ }
+
+ /** Make a list of all combinations of the given types, with the given arities.
+ * A void return type is possible iff the first type is void.class.
+ */
+ static List<MethodType> allMethodTypes(int minargc, int maxargc, Class<?>... types) {
+ ArrayList<MethodType> result = new ArrayList<MethodType>();
+ if (types.length > 0) {
+ ArrayList<MethodType> argcTypes = new ArrayList<MethodType>();
+ // build arity-zero types first
+ for (Class<?> rtype : types) {
+ argcTypes.add(MethodType.methodType(rtype));
+ }
+ if (types[0] == void.class)
+ // void is not an argument type
+ types = Arrays.copyOfRange(types, 1, types.length);
+ for (int argc = 0; argc <= maxargc; argc++) {
+ if (argc >= minargc)
+ result.addAll(argcTypes);
+ if (argc >= maxargc)
+ break;
+ ArrayList<MethodType> prevTypes = argcTypes;
+ argcTypes = new ArrayList<MethodType>();
+ for (MethodType prevType : prevTypes) {
+ for (Class<?> ptype : types) {
+ argcTypes.add(prevType.insertParameterTypes(argc, ptype));
+ }
+ }
+ }
+ }
+ return Collections.unmodifiableList(result);
+ }
+ static List<MethodType> allMethodTypes(int argc, Class<?>... types) {
+ return allMethodTypes(argc, argc, types);
+ }
+
+ interface RandomInterface { }
+
+ MethodHandle toString_MH;
+
+ @Test
+ public void testReferenceConversions() throws Throwable {
+ startTest("testReferenceConversions");
+ toString_MH = LOOKUP.
+ findVirtual(Object.class, "toString", MethodType.methodType(String.class));
+ String[] args = { "one", "two" };
+ for (MethodType type : allMethodTypes(2, Object.class, String.class, RandomInterface.class)) {
+ testReferenceConversions(type, args);
+ }
+ }
+ public void testReferenceConversions(MethodType type, Object... args) throws Throwable {
+ countTest();
+ if (verbosity > 3) System.out.println("target type: "+type);
+ MethodHandle mh = callable(type.parameterList());
+ MethodHandle tsdrop = MethodHandles.dropArguments(toString_MH, 1, type.parameterList());
+ mh = MethodHandles.foldArguments(tsdrop, mh);
+ mh = mh.asType(type);
+ Object res = mh.invokeGeneric((String)args[0], (Object)args[1]);
+ //System.out.println(res);
+ assertEquals(Arrays.asList(args).toString(), res);
+ }
+
+
+ @Test @Ignore("known failure pending 6939861")
+ public void testBoxConversions() throws Throwable {
+ startTest("testBoxConversions");
+ countTest();
+ Integer[] args = { 1, 2 };
+ MethodHandle mh = callable(Object.class, int.class);
+ Object res; List resl;
+ res = resl = (List) mh.invokeGeneric((int)args[0], (Object)args[1]);
+ //System.out.println(res);
+ assertEquals(Arrays.asList(args), res);
+ }
+
+}
--- a/jdk/test/java/dyn/JavaDocExamples.java Tue Dec 21 15:27:55 2010 -0800
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,128 +0,0 @@
-/*
- * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This code is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 only, as
- * published by the Free Software Foundation. Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- */
-
-/* @test
- * @summary example code used in javadoc for java.dyn API
- * @compile -XDallowTransitionalJSR292=no JavaDocExamples.java
- * @run junit/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles test.java.dyn.JavaDocExamples
- */
-
-/*
----- To run outside jtreg:
-$ $JAVA7X_HOME/bin/javac -cp $JUNIT4_JAR -d /tmp/Classes \
- $DAVINCI/sources/jdk/test/java/dyn/JavaDocExamples.java
-$ $JAVA7X_HOME/bin/java -cp $JUNIT4_JAR:/tmp/Classes \
- -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles \
- -Dtest.java.dyn.JavaDocExamples.verbosity=1 \
- test.java.dyn.JavaDocExamples
-----
-*/
-
-package test.java.dyn;
-
-import java.dyn.*;
-import static java.dyn.MethodHandles.*;
-import static java.dyn.MethodType.*;
-
-import java.lang.reflect.*;
-import java.util.*;
-
-import org.junit.*;
-import static org.junit.Assert.*;
-import static org.junit.Assume.*;
-
-
-/**
- * @author jrose
- */
-public class JavaDocExamples {
- /** Wrapper for running the JUnit tests in this module.
- * Put JUnit on the classpath!
- */
- public static void main(String... ignore) {
- org.junit.runner.JUnitCore.runClasses(JavaDocExamples.class);
- }
- // How much output?
- static int verbosity = Integer.getInteger("test.java.dyn.JavaDocExamples.verbosity", 0);
-
-{}
-static final private Lookup LOOKUP = lookup();
-// static final private MethodHandle CONCAT_1 = LOOKUP.findVirtual(String.class,
-// "concat", methodType(String.class, String.class));
-// static final private MethodHandle HASHCODE_1 = LOOKUP.findVirtual(Object.class,
-// "hashCode", methodType(int.class));
-
-// form required if NoAccessException is intercepted:
-static final private MethodHandle CONCAT_2, HASHCODE_2;
-static {
- try {
- CONCAT_2 = LOOKUP.findVirtual(String.class,
- "concat", methodType(String.class, String.class));
- HASHCODE_2 = LOOKUP.findVirtual(Object.class,
- "hashCode", methodType(int.class));
- } catch (NoAccessException ex) {
- throw new RuntimeException(ex);
- }
-}
-{}
-
- @Test public void testFindVirtual() throws Throwable {
-{}
-MethodHandle CONCAT_3 = LOOKUP.findVirtual(String.class,
- "concat", methodType(String.class, String.class));
-MethodHandle HASHCODE_3 = LOOKUP.findVirtual(Object.class,
- "hashCode", methodType(int.class));
-//assertEquals("xy", (String) CONCAT_1.invokeExact("x", "y"));
-assertEquals("xy", (String) CONCAT_2.<String>invokeExact("x", "y"));
-assertEquals("xy", (String) CONCAT_3.<String>invokeExact("x", "y"));
-//assertEquals("xy".hashCode(), (int) HASHCODE_1.<int>invokeExact((Object)"xy"));
-assertEquals("xy".hashCode(), (int) HASHCODE_2.<int>invokeExact((Object)"xy"));
-assertEquals("xy".hashCode(), (int) HASHCODE_3.<int>invokeExact((Object)"xy"));
-{}
- }
- @Test public void testDropArguments() throws Throwable {
- {{
-{} /// JAVADOC
-MethodHandle cat = lookup().findVirtual(String.class,
- "concat", methodType(String.class, String.class));
-cat = cat.asType(methodType(Object.class, String.class, String.class)); /*(String)*/
-assertEquals("xy", /*(String)*/ cat.invokeExact("x", "y"));
-MethodHandle d0 = dropArguments(cat, 0, String.class);
-assertEquals("yz", /*(String)*/ d0.invokeExact("x", "y", "z"));
-MethodHandle d1 = dropArguments(cat, 1, String.class);
-assertEquals("xz", /*(String)*/ d1.invokeExact("x", "y", "z"));
-MethodHandle d2 = dropArguments(cat, 2, String.class);
-assertEquals("xy", /*(String)*/ d2.invokeExact("x", "y", "z"));
-MethodHandle d12 = dropArguments(cat, 1, int.class, boolean.class);
-assertEquals("xz", /*(String)*/ d12.invokeExact("x", 12, true, "z"));
- }}
- }
-
- static void assertEquals(Object exp, Object act) {
- if (verbosity > 0)
- System.out.println("result: "+act);
- Assert.assertEquals(exp, act);
- }
-}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/dyn/JavaDocExamplesTest.java Tue Dec 21 18:45:45 2010 -0800
@@ -0,0 +1,178 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/* @test
+ * @summary example code used in javadoc for java.dyn API
+ * @compile -XDallowTransitionalJSR292=no JavaDocExamplesTest.java
+ * @run junit/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles test.java.dyn.JavaDocExamplesTest
+ */
+
+/*
+---- To run outside jtreg:
+$ $JAVA7X_HOME/bin/javac -cp $JUNIT4_JAR -d /tmp/Classes \
+ $DAVINCI/sources/jdk/test/java/dyn/JavaDocExamplesTest.java
+$ $JAVA7X_HOME/bin/java -cp $JUNIT4_JAR:/tmp/Classes \
+ -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles \
+ -Dtest.java.dyn.JavaDocExamplesTest.verbosity=1 \
+ test.java.dyn.JavaDocExamplesTest
+----
+*/
+
+package test.java.dyn;
+
+import java.dyn.*;
+import static java.dyn.MethodHandles.*;
+import static java.dyn.MethodType.*;
+
+import java.lang.reflect.*;
+import java.util.*;
+
+import org.junit.*;
+import static org.junit.Assert.*;
+import static org.junit.Assume.*;
+
+
+/**
+ * @author jrose
+ */
+public class JavaDocExamplesTest {
+ /** Wrapper for running the JUnit tests in this module.
+ * Put JUnit on the classpath!
+ */
+ public static void main(String... ignore) {
+ org.junit.runner.JUnitCore.runClasses(JavaDocExamplesTest.class);
+ }
+ // How much output?
+ static int verbosity = Integer.getInteger("test.java.dyn.JavaDocExamplesTest.verbosity", 0);
+
+{}
+static final private Lookup LOOKUP = lookup();
+// static final private MethodHandle CONCAT_1 = LOOKUP.findVirtual(String.class,
+// "concat", methodType(String.class, String.class));
+// static final private MethodHandle HASHCODE_1 = LOOKUP.findVirtual(Object.class,
+// "hashCode", methodType(int.class));
+
+// form required if NoAccessException is intercepted:
+static final private MethodHandle CONCAT_2, HASHCODE_2;
+static {
+ try {
+ CONCAT_2 = LOOKUP.findVirtual(String.class,
+ "concat", methodType(String.class, String.class));
+ HASHCODE_2 = LOOKUP.findVirtual(Object.class,
+ "hashCode", methodType(int.class));
+ } catch (NoAccessException ex) {
+ throw new RuntimeException(ex);
+ }
+}
+{}
+
+ @Test public void testFindVirtual() throws Throwable {
+{}
+MethodHandle CONCAT_3 = LOOKUP.findVirtual(String.class,
+ "concat", methodType(String.class, String.class));
+MethodHandle HASHCODE_3 = LOOKUP.findVirtual(Object.class,
+ "hashCode", methodType(int.class));
+//assertEquals("xy", (String) CONCAT_1.invokeExact("x", "y"));
+assertEquals("xy", (String) CONCAT_2.invokeExact("x", "y"));
+assertEquals("xy", (String) CONCAT_3.invokeExact("x", "y"));
+//assertEquals("xy".hashCode(), (int) HASHCODE_1.invokeExact((Object)"xy"));
+assertEquals("xy".hashCode(), (int) HASHCODE_2.invokeExact((Object)"xy"));
+assertEquals("xy".hashCode(), (int) HASHCODE_3.invokeExact((Object)"xy"));
+{}
+ }
+ @Test public void testDropArguments() throws Throwable {
+ {{
+{} /// JAVADOC
+MethodHandle cat = lookup().findVirtual(String.class,
+ "concat", methodType(String.class, String.class));
+assertEquals("xy", (String) cat.invokeExact("x", "y"));
+MethodHandle d0 = dropArguments(cat, 0, String.class);
+assertEquals("yz", (String) d0.invokeExact("x", "y", "z"));
+MethodHandle d1 = dropArguments(cat, 1, String.class);
+assertEquals("xz", (String) d1.invokeExact("x", "y", "z"));
+MethodHandle d2 = dropArguments(cat, 2, String.class);
+assertEquals("xy", (String) d2.invokeExact("x", "y", "z"));
+MethodHandle d12 = dropArguments(cat, 1, int.class, boolean.class);
+assertEquals("xz", (String) d12.invokeExact("x", 12, true, "z"));
+ }}
+ }
+
+ @Test public void testFilterArguments() throws Throwable {
+ {{
+{} /// JAVADOC
+MethodHandle cat = lookup().findVirtual(String.class,
+ "concat", methodType(String.class, String.class));
+MethodHandle upcase = lookup().findVirtual(String.class,
+ "toUpperCase", methodType(String.class));
+assertEquals("xy", (String) cat.invokeExact("x", "y"));
+MethodHandle f0 = filterArguments(cat, 0, upcase);
+assertEquals("Xy", (String) f0.invokeExact("x", "y")); // Xy
+MethodHandle f1 = filterArguments(cat, 1, upcase);
+assertEquals("xY", (String) f1.invokeExact("x", "y")); // xY
+MethodHandle f2 = filterArguments(cat, 0, upcase, upcase);
+assertEquals("XY", (String) f2.invokeExact("x", "y")); // XY
+ }}
+ }
+
+ static void assertEquals(Object exp, Object act) {
+ if (verbosity > 0)
+ System.out.println("result: "+act);
+ Assert.assertEquals(exp, act);
+ }
+
+static MethodHandle asList;
+ @Test public void testWithTypeHandler() throws Throwable {
+ {{
+{} /// JAVADOC
+MethodHandle makeEmptyList = MethodHandles.constant(List.class, Arrays.asList());
+MethodHandle asList = lookup()
+ .findStatic(Arrays.class, "asList", methodType(List.class, Object[].class));
+
+JavaDocExamplesTest.asList = asList;
+/*
+static MethodHandle collectingTypeHandler(MethodHandle base, MethodType newType) {
+ return asList.asCollector(Object[].class, newType.parameterCount()).asType(newType);
+}
+*/
+
+MethodHandle collectingTypeHandler = lookup()
+ .findStatic(lookup().lookupClass(), "collectingTypeHandler",
+ methodType(MethodHandle.class, MethodHandle.class, MethodType.class));
+MethodHandle makeAnyList = makeEmptyList.withTypeHandler(collectingTypeHandler);
+
+assertEquals("[]", makeAnyList.invokeGeneric().toString());
+assertEquals("[1]", makeAnyList.invokeGeneric(1).toString());
+assertEquals("[two, too]", makeAnyList.invokeGeneric("two", "too").toString());
+ }}
+ }
+
+static MethodHandle collectingTypeHandler(MethodHandle base, MethodType newType) {
+ //System.out.println("Converting "+asList+" to "+newType);
+ MethodHandle conv = asList.asCollector(Object[].class, newType.parameterCount()).asType(newType);
+ //System.out.println(" =>"+conv);
+ return conv;
+}
+
+}
--- a/jdk/test/java/dyn/MethodHandlesTest.java Tue Dec 21 15:27:55 2010 -0800
+++ b/jdk/test/java/dyn/MethodHandlesTest.java Tue Dec 21 18:45:45 2010 -0800
@@ -25,8 +25,8 @@
/* @test
* @summary unit tests for java.dyn.MethodHandles
- * @compile -XDinvokedynamic MethodHandlesTest.java
- * @run junit/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableInvokeDynamic test.java.dyn.MethodHandlesTest
+ * @compile -source 7 -target 7 -XDallowTransitionalJSR292=no MethodHandlesTest.java
+ * @run junit/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableMethodHandles test.java.dyn.MethodHandlesTest
*/
package test.java.dyn;
@@ -62,7 +62,6 @@
// lookups, without exercising the actual method handle.
static boolean DO_MORE_CALLS = true;
-
@Test
public void testFirst() throws Throwable {
verbosity += 9; try {
@@ -458,7 +457,7 @@
Exception noAccess = null;
try {
if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
- target = lookup.findStatic(defc, name, type);
+ target = lookup.in(defc).findStatic(defc, name, type);
} catch (NoAccessException ex) {
noAccess = ex;
}
@@ -469,16 +468,22 @@
assertEquals(positive ? "positive test" : "negative test erroneously passed", positive, target != null);
if (!positive) return; // negative test failed as expected
assertEquals(type, target.type());
- assertTrue(target.toString().contains(name)); // rough check
+ assertNameStringContains(target, name);
if (!DO_MORE_CALLS && lookup != PRIVATE) return;
Object[] args = randomArgs(params);
printCalled(target, name, args);
- target.invokeVarargs(args);
+ target.invokeWithArguments(args);
assertCalled(name, args);
if (verbosity >= 1)
System.out.print(':');
}
+ // rough check of name string
+ static void assertNameStringContains(Object x, String s) {
+ if (x.toString().contains(s)) return;
+ assertEquals(s, x);
+ }
+
@Test
public void testFindVirtual() throws Throwable {
if (CAN_SKIP_WORKING) return;
@@ -522,7 +527,7 @@
Exception noAccess = null;
try {
if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
- target = lookup.findVirtual(defc, methodName, type);
+ target = lookup.in(defc).findVirtual(defc, methodName, type);
} catch (NoAccessException ex) {
noAccess = ex;
}
@@ -535,12 +540,12 @@
Class<?>[] paramsWithSelf = cat(array(Class[].class, (Class)defc), params);
MethodType typeWithSelf = MethodType.methodType(ret, paramsWithSelf);
assertEquals(typeWithSelf, target.type());
- assertTrue(target.toString().contains(methodName)); // rough check
+ assertNameStringContains(target, methodName);
if (!DO_MORE_CALLS && lookup != PRIVATE) return;
Object[] argsWithSelf = randomArgs(paramsWithSelf);
if (rcvc != defc) argsWithSelf[0] = randomArg(rcvc);
printCalled(target, name, argsWithSelf);
- target.invokeVarargs(argsWithSelf);
+ target.invokeWithArguments(argsWithSelf);
assertCalled(name, argsWithSelf);
if (verbosity >= 1)
System.out.print(':');
@@ -576,7 +581,8 @@
Exception noAccess = null;
try {
if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
- target = lookup.findSpecial(defc, name, type, specialCaller);
+ if (verbosity >= 5) System.out.println(" lookup => "+lookup.in(specialCaller));
+ target = lookup.in(specialCaller).findSpecial(defc, name, type, specialCaller);
} catch (NoAccessException ex) {
noAccess = ex;
}
@@ -591,11 +597,11 @@
assertEquals(type, target.type().dropParameterTypes(0,1));
Class<?>[] paramsWithSelf = cat(array(Class[].class, (Class)specialCaller), params);
MethodType typeWithSelf = MethodType.methodType(ret, paramsWithSelf);
- assertTrue(target.toString().contains(name)); // rough check
+ assertNameStringContains(target, name);
if (!DO_MORE_CALLS && lookup != PRIVATE && lookup != EXAMPLE) return;
Object[] args = randomArgs(paramsWithSelf);
printCalled(target, name, args);
- target.invokeVarargs(args);
+ target.invokeWithArguments(args);
assertCalled(name, args);
}
@@ -632,7 +638,7 @@
Exception noAccess = null;
try {
if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
- target = lookup.bind(receiver, methodName, type);
+ target = lookup.in(defc).bind(receiver, methodName, type);
} catch (NoAccessException ex) {
noAccess = ex;
}
@@ -645,7 +651,7 @@
assertEquals(type, target.type());
Object[] args = randomArgs(params);
printCalled(target, name, args);
- target.invokeVarargs(args);
+ target.invokeWithArguments(args);
Object[] argsWithReceiver = cat(array(Object[].class, receiver), args);
assertCalled(name, argsWithReceiver);
if (verbosity >= 1)
@@ -705,9 +711,9 @@
try {
if (verbosity >= 4) System.out.println("lookup via "+lookup+" of "+defc+" "+name+type);
if (isSpecial)
- target = lookup.unreflectSpecial(rmethod, specialCaller);
+ target = lookup.in(specialCaller).unreflectSpecial(rmethod, specialCaller);
else
- target = lookup.unreflect(rmethod);
+ target = lookup.in(defc).unreflect(rmethod);
} catch (NoAccessException ex) {
noAccess = ex;
}
@@ -737,7 +743,7 @@
}
Object[] argsMaybeWithSelf = randomArgs(paramsMaybeWithSelf);
printCalled(target, name, argsMaybeWithSelf);
- target.invokeVarargs(argsMaybeWithSelf);
+ target.invokeWithArguments(argsMaybeWithSelf);
assertCalled(name, argsMaybeWithSelf);
if (verbosity >= 1)
System.out.print(':');
@@ -875,7 +881,7 @@
if (isStatic) expType = expType.dropParameterTypes(0, 1);
MethodHandle mh = lookup.unreflectGetter(f);
assertSame(mh.type(), expType);
- assertEquals(mh.toString(), fname);
+ assertNameStringContains(mh, fname);
HasFields fields = new HasFields();
Object sawValue;
Class<?> rtype = type;
@@ -885,12 +891,12 @@
for (int i = 0; i <= 1; i++) {
if (isStatic) {
if (type == int.class)
- sawValue = mh.<int>invokeExact(); // do these exactly
+ sawValue = (int) mh.invokeExact(); // do these exactly
else
sawValue = mh.invokeExact();
} else {
if (type == int.class)
- sawValue = mh.<int>invokeExact((Object) fields);
+ sawValue = (int) mh.invokeExact((Object) fields);
else
sawValue = mh.invokeExact((Object) fields);
}
@@ -947,7 +953,7 @@
mh = lookup.findStaticSetter(fclass, fname, ftype);
else throw new InternalError();
assertSame(mh.type(), expType);
- assertEquals(mh.toString(), fname);
+ assertNameStringContains(mh, fname);
HasFields fields = new HasFields();
Object sawValue;
Class<?> vtype = type;
@@ -959,14 +965,14 @@
Object putValue = randomArg(type);
if (isStatic) {
if (type == int.class)
- mh.<void>invokeExact((int)(Integer)putValue); // do these exactly
+ mh.invokeExact((int)putValue); // do these exactly
else
- mh.<void>invokeExact(putValue);
+ mh.invokeExact(putValue);
} else {
if (type == int.class)
- mh.<void>invokeExact((Object) fields, (int)(Integer)putValue);
+ mh.invokeExact((Object) fields, (int)putValue);
else
- mh.<void>invokeExact((Object) fields, putValue);
+ mh.invokeExact((Object) fields, putValue);
}
assertEquals(f.get(fields), putValue);
}
@@ -1032,11 +1038,11 @@
model.set(i, random);
if (testSetter) {
if (elemType == int.class)
- mh.<void>invokeExact((int[]) array, i, (int)(Integer)random);
+ mh.invokeExact((int[]) array, i, (int)random);
else if (elemType == boolean.class)
- mh.<void>invokeExact((boolean[]) array, i, (boolean)(Boolean)random);
+ mh.invokeExact((boolean[]) array, i, (boolean)random);
else
- mh.<void>invokeExact(array, i, random);
+ mh.invokeExact(array, i, random);
assertEquals(model, array2list(array));
} else {
Array.set(array, i, random);
@@ -1052,9 +1058,9 @@
if (!testSetter) {
expValue = sawValue;
if (elemType == int.class)
- sawValue = mh.<int>invokeExact((int[]) array, i);
+ sawValue = (int) mh.invokeExact((int[]) array, i);
else if (elemType == boolean.class)
- sawValue = mh.<boolean>invokeExact((boolean[]) array, i);
+ sawValue = (boolean) mh.invokeExact((boolean[]) array, i);
else
sawValue = mh.invokeExact(array, i);
assertEquals(sawValue, expValue);
@@ -1102,6 +1108,18 @@
}
}
+ static MethodHandle typeHandler2(MethodHandle target, MethodType newType) {
+ MethodType oldType = target.type();
+ int oldArity = oldType.parameterCount();
+ int newArity = newType.parameterCount();
+ if (newArity < oldArity)
+ return MethodHandles.insertArguments(target, oldArity, "OPTIONAL");
+ else if (newArity > oldArity)
+ return MethodHandles.dropArguments(target, oldArity-1, newType.parameterType(oldArity-1));
+ else
+ return target; // attempt no further conversions
+ }
+
@Test
public void testConvertArguments() throws Throwable {
if (CAN_SKIP_WORKING) return;
@@ -1115,10 +1133,29 @@
}
void testConvert(MethodHandle id, Class<?> rtype, String name, Class<?>... params) throws Throwable {
- testConvert(true, id, rtype, name, params);
+ testConvert(true, false, id, rtype, name, params);
+ testConvert(true, true, id, rtype, name, params);
}
- void testConvert(boolean positive, MethodHandle id, Class<?> rtype, String name, Class<?>... params) throws Throwable {
+ @Test
+ public void testTypeHandler() throws Throwable {
+ MethodHandle id = Callee.ofType(1);
+ MethodHandle th2 = PRIVATE.findStatic(MethodHandlesTest.class, "typeHandler2",
+ MethodType.methodType(MethodHandle.class, MethodHandle.class, MethodType.class));
+ MethodHandle id2 = id.withTypeHandler(th2);
+ testConvert(true, false, id2, null, "id", Object.class);
+ testConvert(true, true, id2, null, "id", Object.class);
+ if (true) return; //FIXME
+ testConvert(true, false, id2, null, "id", String.class); // FIXME: throws WMT
+ testConvert(false, true, id2, null, "id", String.class); // FIXME: should not succeed
+ testConvert(false, false, id2, null, "id", Object.class, String.class); //FIXME: array[1] line 1164
+ testConvert(true, true, id2, null, "id", Object.class, String.class);
+ testConvert(false, false, id2, null, "id");
+ testConvert(true, true, id2, null, "id");
+ }
+
+ void testConvert(boolean positive, boolean useAsType,
+ MethodHandle id, Class<?> rtype, String name, Class<?>... params) throws Throwable {
countTest(positive);
MethodType idType = id.type();
if (rtype == null) rtype = idType.returnType();
@@ -1135,7 +1172,7 @@
if (src != dst)
convArgs[i] = castToWrapper(convArgs[i], dst);
}
- Object convResult = id.invokeVarargs(convArgs);
+ Object convResult = id.invokeWithArguments(convArgs);
{
Class<?> dst = newType.returnType();
Class<?> src = idType.returnType();
@@ -1145,7 +1182,10 @@
MethodHandle target = null;
RuntimeException error = null;
try {
- target = MethodHandles.convertArguments(id, newType);
+ if (useAsType)
+ target = MethodHandles.convertArguments(id, newType);
+ else
+ target = id.asType(newType);
} catch (RuntimeException ex) {
error = ex;
}
@@ -1157,7 +1197,7 @@
if (!positive) return; // negative test failed as expected
assertEquals(newType, target.type());
printCalled(target, id.toString(), args);
- Object result = target.invokeVarargs(args);
+ Object result = target.invokeWithArguments(args);
assertCalled(name, convArgs);
assertEquals(convResult, result);
if (verbosity >= 1)
@@ -1279,7 +1319,7 @@
MethodType outType = MethodType.methodType(Object.class, permTypes);
MethodHandle target = MethodHandles.convertArguments(ValueConversions.varargsList(outargs), outType);
MethodHandle newTarget = MethodHandles.permuteArguments(target, inType, reorder);
- Object result = newTarget.invokeVarargs(args);
+ Object result = newTarget.invokeWithArguments(args);
Object expected = Arrays.asList(permArgs);
assertEquals(expected, result);
}
@@ -1311,19 +1351,19 @@
Object[] args = randomArgs(target2.type().parameterArray());
// make sure the target does what we think it does:
if (pos == 0 && nargs < 5) {
- Object[] check = (Object[]) target.invokeVarargs(args);
+ Object[] check = (Object[]) target.invokeWithArguments(args);
assertArrayEquals(args, check);
switch (nargs) {
case 0:
- check = target.<Object[]>invokeExact();
+ check = (Object[]) target.invokeExact();
assertArrayEquals(args, check);
break;
case 1:
- check = target.<Object[]>invokeExact(args[0]);
+ check = (Object[]) target.invokeExact(args[0]);
assertArrayEquals(args, check);
break;
case 2:
- check = target.<Object[]>invokeExact(args[0], args[1]);
+ check = (Object[]) target.invokeExact(args[0], args[1]);
assertArrayEquals(args, check);
break;
}
@@ -1337,12 +1377,15 @@
MethodHandle result = MethodHandles.spreadArguments(target2, newType);
Object[] returnValue;
if (pos == 0) {
- Object rawRetVal = result.invokeExact(args);
- returnValue = (Object[]) rawRetVal;
+ // In the following line, the first cast implies
+ // normal Object return value for the MH call (Object[])->Object,
+ // while the second cast dynamically converts to an Object array.
+ // Such a double cast is typical of MH.invokeExact.
+ returnValue = (Object[]) (Object) result.invokeExact(args);
} else {
Object[] args1 = Arrays.copyOfRange(args, 0, pos+1);
args1[pos] = Arrays.copyOfRange(args, pos, args.length);
- returnValue = (Object[]) result.invokeVarargs(args1);
+ returnValue = (Object[]) result.invokeWithArguments(args1);
}
assertArrayEquals(args, returnValue);
}
@@ -1379,7 +1422,7 @@
if (verbosity >= 3)
System.out.println("collect from "+Arrays.asList(args)+" ["+pos+".."+nargs+"]");
MethodHandle result = MethodHandles.collectArguments(target, newType);
- Object[] returnValue = (Object[]) result.invokeVarargs(args);
+ Object[] returnValue = (Object[]) result.invokeWithArguments(args);
// assertTrue(returnValue.length == pos+1 && returnValue[pos] instanceof Object[]);
// returnValue[pos] = Arrays.asList((Object[]) returnValue[pos]);
// collectedArgs[pos] = Arrays.asList((Object[]) collectedArgs[pos]);
@@ -1412,7 +1455,7 @@
MethodHandle target2 = MethodHandles.insertArguments(target, pos,
(Object[]) argsToInsert.toArray());
argsToInsert.clear(); // remove from argsToInsert
- Object res2 = target2.invokeVarargs(argsToPass);
+ Object res2 = target2.invokeWithArguments(argsToPass);
Object res2List = Arrays.asList((Object[])res2);
if (verbosity >= 3)
System.out.println("result: "+res2List);
@@ -1440,14 +1483,12 @@
Object[] argsToPass = randomArgs(nargs, Object.class);
if (verbosity >= 3)
System.out.println("filter "+target+" at "+pos+" with "+filter);
- MethodHandle[] filters = new MethodHandle[pos*2+1];
- filters[pos] = filter;
- MethodHandle target2 = MethodHandles.filterArguments(target, filters);
+ MethodHandle target2 = MethodHandles.filterArguments(target, pos, filter);
// Simulate expected effect of filter on arglist:
Object[] filteredArgs = argsToPass.clone();
filteredArgs[pos] = filter.invokeExact(filteredArgs[pos]);
List<Object> expected = Arrays.asList(filteredArgs);
- Object result = target2.invokeVarargs(argsToPass);
+ Object result = target2.invokeWithArguments(argsToPass);
if (verbosity >= 3)
System.out.println("result: "+result);
if (!expected.equals(result))
@@ -1472,7 +1513,7 @@
if (pos != 0) return; // can fold only at pos=0 for now
countTest();
MethodHandle target = ValueConversions.varargsList(1 + nargs);
- MethodHandle combine = ValueConversions.varargsList(fold);
+ MethodHandle combine = ValueConversions.varargsList(fold).asType(MethodType.genericMethodType(fold));
List<Object> argsToPass = Arrays.asList(randomArgs(nargs, Object.class));
if (verbosity >= 3)
System.out.println("fold "+target+" with "+combine);
@@ -1482,9 +1523,9 @@
List<Object> argsToFold = expected.subList(pos, pos + fold);
if (verbosity >= 3)
System.out.println("fold: "+argsToFold+" into "+target2);
- Object foldedArgs = combine.invokeVarargs(argsToFold);
+ Object foldedArgs = combine.invokeWithArguments(argsToFold);
argsToFold.add(0, foldedArgs);
- Object result = target2.invokeVarargs(argsToPass);
+ Object result = target2.invokeWithArguments(argsToPass);
if (verbosity >= 3)
System.out.println("result: "+result);
if (!expected.equals(result))
@@ -1516,7 +1557,7 @@
for (int i = drop; i > 0; i--) {
argsToDrop.add(pos, "blort#"+i);
}
- Object res2 = target2.invokeVarargs(argsToDrop);
+ Object res2 = target2.invokeWithArguments(argsToDrop);
Object res2List = Arrays.asList((Object[])res2);
//if (!resList.equals(res2List))
// System.out.println("*** fail at n/p/d = "+nargs+"/"+pos+"/"+drop+": "+argsToDrop+" => "+res2List);
@@ -1572,7 +1613,7 @@
countTest();
calledLog.clear();
inv = MethodHandles.exactInvoker(type);
- result = inv.invokeVarargs(targetPlusArgs);
+ result = inv.invokeWithArguments(targetPlusArgs);
if (testRetCode) assertEquals(code, result);
assertCalled("invokee", args);
// generic invoker
@@ -1598,7 +1639,7 @@
assertCalled("invokee", args);
}
calledLog.clear();
- result = inv.invokeVarargs(targetPlusArgs);
+ result = inv.invokeWithArguments(targetPlusArgs);
if (testRetCode) assertEquals(code, result);
assertCalled("invokee", args);
// varargs invoker #0
@@ -1640,17 +1681,29 @@
List<Object> tailList = targetPlusVarArgs.subList(1+k, 1+nargs);
Object[] tail = tailList.toArray();
tailList.clear(); tailList.add(tail);
- result = inv.invokeVarargs(targetPlusVarArgs);
+ result = inv.invokeWithArguments(targetPlusVarArgs);
if (testRetCode) assertEquals(code, result);
assertCalled("invokee", args);
}
+
// dynamic invoker
countTest();
- CallSite site = new CallSite(MethodHandlesTest.class, "foo", type);
- inv = MethodHandles.dynamicInvoker(site);
+ CallSite site = new MutableCallSite(type);
+ inv = site.dynamicInvoker();
+
+ // see if we get the result of the original target:
+ try {
+ result = inv.invokeWithArguments(args);
+ assertTrue("should not reach here", false);
+ } catch (IllegalStateException ex) {
+ String msg = ex.getMessage();
+ assertTrue(msg, msg.contains("site"));
+ }
+
+ // set new target after invoker is created, to make sure we track target
site.setTarget(target);
calledLog.clear();
- result = inv.invokeVarargs(args);
+ result = inv.invokeWithArguments(args);
if (testRetCode) assertEquals(code, result);
assertCalled("invokee", args);
}
@@ -1734,7 +1787,7 @@
String willCall = (equals ? "targetIfEquals" : "fallbackIfNotEquals");
if (verbosity >= 3)
System.out.println(logEntry(willCall, argList));
- Object result = mh.invokeVarargs(argList);
+ Object result = mh.invokeWithArguments(argList);
assertCalled(willCall, argList);
}
}
@@ -1767,16 +1820,17 @@
MethodHandle throwOrReturn
= PRIVATE.findStatic(MethodHandlesTest.class, "throwOrReturn",
MethodType.methodType(Object.class, Object.class, Throwable.class));
- MethodHandle thrower = throwOrReturn;
+ MethodHandle thrower = throwOrReturn.asType(MethodType.genericMethodType(2));
while (thrower.type().parameterCount() < nargs)
thrower = MethodHandles.dropArguments(thrower, thrower.type().parameterCount(), Object.class);
+ MethodHandle catcher = ValueConversions.varargsList(1+nargs).asType(MethodType.genericMethodType(1+nargs));
MethodHandle target = MethodHandles.catchException(thrower,
- thrown.getClass(), ValueConversions.varargsList(1+nargs));
+ thrown.getClass(), catcher);
assertEquals(thrower.type(), target.type());
//System.out.println("catching with "+target+" : "+throwOrReturn);
Object[] args = randomArgs(nargs, Object.class);
args[1] = (throwIt ? thrown : null);
- Object returned = target.invokeVarargs(args);
+ Object returned = target.invokeWithArguments(args);
//System.out.println("return from "+target+" : "+returned);
if (!throwIt) {
assertSame(args[0], returned);
@@ -1828,13 +1882,10 @@
testCastFailure("unbox/return", 11000);
}
- static class Surprise implements MethodHandleProvider {
+ static class Surprise {
public MethodHandle asMethodHandle() {
return VALUE.bindTo(this);
}
- public MethodHandle asMethodHandle(MethodType type) {
- return asMethodHandle().asType(type);
- }
Object value(Object x) {
trace("value", x);
if (boo != null) return boo;
@@ -1896,8 +1947,8 @@
}
if (callee != null) {
callee = MethodHandles.convertArguments(callee, MethodType.genericMethodType(1));
- surprise = MethodHandles.filterArguments(callee, surprise);
- identity = MethodHandles.filterArguments(callee, identity);
+ surprise = MethodHandles.filterArguments(callee, 0, surprise);
+ identity = MethodHandles.filterArguments(callee, 0, identity);
}
}
assertNotSame(mode, surprise, surprise0);
@@ -1949,7 +2000,7 @@
assertEquals(mt, mh.type());
assertEquals(Example.class, mh.type().returnType());
args = randomArgs(mh.type().parameterArray());
- mh.invokeVarargs(args);
+ mh.invokeWithArguments(args);
assertCalled(name, args);
// Try a virtual method.
@@ -1959,7 +2010,7 @@
assertEquals(mt, mh.type().dropParameterTypes(0,1));
assertTrue(mh.type().parameterList().contains(Example.class));
args = randomArgs(mh.type().parameterArray());
- mh.invokeVarargs(args);
+ mh.invokeWithArguments(args);
assertCalled(name, args);
}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/dyn/indify/Indify.java Tue Dec 21 18:45:45 2010 -0800
@@ -0,0 +1,1861 @@
+/*
+ * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package indify;
+
+import java.util.*;
+import java.io.*;
+import java.lang.reflect.Modifier;
+import java.util.regex.*;
+
+/**
+ * Transform one or more class files to incorporate JSR 292 features,
+ * such as {@code invokedynamic}.
+ * <p>
+ * This is a standalone program in a single source file.
+ * In this form, it may be useful for test harnesses, small experiments, and javadoc examples.
+ * Copies of this file may show up in multiple locations for standalone usage.
+ * The primary maintained location of this file is as follows:
+ * <a href="http://kenai.com/projects/ninja/sources/indify-repo/content/src/indify/Indify.java">
+ * http://kenai.com/projects/ninja/sources/indify-repo/content/src/indify/Indify.java</a>
+ * <p>
+ * Static private methods named MH_x and MT_x (where x is arbitrary)
+ * must be stereotyped generators of MethodHandle and MethodType
+ * constants. All calls to them are transformed to {@code CONSTANT_MethodHandle}
+ * and {@code CONSTANT_MethodType} "ldc" instructions.
+ * The stereotyped code must create method types by calls to {@code methodType} or
+ * {@code fromMethodDescriptorString}. The "lookup" argument must be created
+ * by calls to {@code java.dyn.MethodHandles#lookup MethodHandles.lookup}.
+ * The class and string arguments must be constant.
+ * The following methods of {@code java.dyn.MethodHandle.Lookup Lookup} are
+ * allowed for method handle creation: {@code findStatic}, {@code findVirtual},
+ * {@code findConstructor}, {@code findSpecial},
+ * {@code findGetter}, {@code findSetter},
+ * {@code findStaticGetter}, or {@code findStaticSetter}.
+ * The call to one of these methods must be followed immediately
+ * by an {@code areturn} instruction.
+ * The net result of the call to the MH_x or MT_x method must be
+ * the creation of a constant method handle. Thus, replacing calls
+ * to MH_x or MT_x methods by {@code ldc} instructions should leave
+ * the meaning of the program unchanged.
+ * <p>
+ * Static private methods named INDY_x must be stereotyped generators
+ * of {@code invokedynamic} call sites.
+ * All calls to them must be immediately followed by
+ * {@code invokeExact} calls.
+ * All such pairs of calls are transformed to {@code invokedynamic}
+ * instructions. Each INDY_x method must begin with a call to a
+ * MH_x method, which is taken to be its bootstrap method.
+ * The method must be immediately invoked (via {@code invokeGeneric}
+ * on constant lookup, name, and type arguments. An object array of
+ * constants may also be appended to the {@code invokeGeneric call}.
+ * This call must be cast to {@code CallSite}, and the result must be
+ * immediately followed by a call to {@code dynamicInvoker}, with the
+ * resulting method handle returned.
+ * <p>
+ * The net result of all of these actions is equivalent to the JVM's
+ * execution of an {@code invokedynamic} instruction in the unlinked state.
+ * Running this code once should produce the same results as running
+ * the corresponding {@code invokedynamic} instruction.
+ * In order to model the caching behavior, the code of an INDY_x
+ * method is allowed to begin with getstatic, aaload, and if_acmpne
+ * instructions which load a static method handle value and return it
+ * if the value is non-null.
+ * <p>
+ * Example usage:
+ * <blockquote><pre>
+$ JAVA_HOME=(some recent OpenJDK 7 build)
+$ ant
+$ $JAVA_HOME/bin/java -cp build/classes indify.Indify --overwrite --dest build/testout build/classes/indify/Example.class
+$ $JAVA_HOME/bin/java -XX:+UnlockExperimentalVMOptions -XX:+EnableInvokeDynamic -cp build/classes indify.Example
+MT = (java.lang.Object)java.lang.Object
+MH = adder(int,int)java.lang.Integer
+adder(1,2) = 3
+calling indy: 42
+$ $JAVA_HOME/bin/java -XX:+UnlockExperimentalVMOptions -XX:+EnableInvokeDynamic -cp build/testout indify.Example
+(same output as above)
+ * </pre></blockquote>
+ * <p>
+ * Until the format of {@code CONSTANT_InvokeDynamic} entries is finalized,
+ * the {@code --transitionalJSR292} switch is recommended (and turned on by default).
+ * <p>
+ * A version of this transformation built on top of <a href="http://asm.ow2.org/">http://asm.ow2.org/</a> would be welcome.
+ * @author John Rose
+ */
+public class Indify {
+ public static void main(String... av) throws IOException {
+ new Indify().run(av);
+ }
+
+ public File dest;
+ public String[] classpath = {"."};
+ public boolean keepgoing = false;
+ public boolean expandProperties = false;
+ public boolean overwrite = false;
+ public boolean quiet = false;
+ public boolean verbose = false;
+ public boolean transitionalJSR292 = true; // default to false later
+ public boolean all = false;
+ public int verifySpecifierCount = -1;
+
+ public void run(String... av) throws IOException {
+ List<String> avl = new ArrayList<>(Arrays.asList(av));
+ parseOptions(avl);
+ if (avl.isEmpty())
+ throw new IllegalArgumentException("Usage: indify [--dest dir] [option...] file...");
+ if ("--java".equals(avl.get(0))) {
+ avl.remove(0);
+ try {
+ runApplication(avl.toArray(new String[0]));
+ } catch (Exception ex) {
+ if (ex instanceof RuntimeException) throw (RuntimeException) ex;
+ throw new RuntimeException(ex);
+ }
+ return;
+ }
+ Exception err = null;
+ for (String a : avl) {
+ try {
+ indify(a);
+ } catch (Exception ex) {
+ if (err == null) err = ex;
+ System.err.println("failure on "+a);
+ if (!keepgoing) break;
+ }
+ }
+ if (err != null) {
+ if (err instanceof IOException) throw (IOException) err;
+ throw (RuntimeException) err;
+ }
+ }
+
+ /** Execute the given application under a class loader which indifies all application classes. */
+ public void runApplication(String... av) throws Exception {
+ List<String> avl = new ArrayList<>(Arrays.asList(av));
+ String mainClassName = avl.remove(0);
+ av = avl.toArray(new String[0]);
+ Class<?> mainClass = Class.forName(mainClassName, true, makeClassLoader());
+ java.lang.reflect.Method main = mainClass.getMethod("main", String[].class);
+ main.invoke(null, (Object) av);
+ }
+
+ public void parseOptions(List<String> av) throws IOException {
+ for (; !av.isEmpty(); av.remove(0)) {
+ String a = av.get(0);
+ if (a.startsWith("-")) {
+ String a2 = null;
+ int eq = a.indexOf('=');
+ if (eq > 0) {
+ a2 = maybeExpandProperties(a.substring(eq+1));
+ a = a.substring(0, eq+1);
+ }
+ switch (a) {
+ case "--java":
+ return; // keep this argument
+ case "-d": case "--dest": case "-d=": case "--dest=":
+ dest = new File(a2 != null ? a2 : maybeExpandProperties(av.remove(1)));
+ break;
+ case "-cp": case "--classpath":
+ classpath = maybeExpandProperties(av.remove(1)).split("["+File.pathSeparatorChar+"]");
+ break;
+ case "-k": case "--keepgoing": case "--keepgoing=":
+ keepgoing = booleanOption(a2); // print errors but keep going
+ break;
+ case "--expand-properties": case "--expand-properties=":
+ expandProperties = booleanOption(a2); // expand property references in subsequent arguments
+ break;
+ case "--verify-specifier-count": case "--verify-specifier-count=":
+ verifySpecifierCount = Integer.valueOf(a2);
+ break;
+ case "--overwrite": case "--overwrite=":
+ overwrite = booleanOption(a2); // overwrite output files
+ break;
+ case "--all": case "--all=":
+ all = booleanOption(a2); // copy all classes, even if no patterns
+ break;
+ case "-q": case "--quiet": case "--quiet=":
+ quiet = booleanOption(a2); // less output
+ break;
+ case "-v": case "--verbose": case "--verbose=":
+ verbose = booleanOption(a2); // more output
+ break;
+ case "--transitionalJSR292": case "--transitionalJSR292=":
+ transitionalJSR292 = booleanOption(a2); // use older invokedynamic format
+ break;
+ default:
+ throw new IllegalArgumentException("unrecognized flag: "+a);
+ }
+ continue;
+ } else {
+ break;
+ }
+ }
+ if (dest == null && !overwrite)
+ throw new RuntimeException("no output specified; need --dest d or --overwrite");
+ if (expandProperties) {
+ for (int i = 0; i < av.size(); i++)
+ av.set(i, maybeExpandProperties(av.get(i)));
+ }
+ }
+
+ private boolean booleanOption(String s) {
+ if (s == null) return true;
+ switch (s) {
+ case "true": case "yes": case "1": return true;
+ case "false": case "no": case "0": return false;
+ }
+ throw new IllegalArgumentException("unrecognized boolean flag="+s);
+ }
+
+ private String maybeExpandProperties(String s) {
+ if (!expandProperties) return s;
+ Set<String> propsDone = new HashSet<>();
+ while (s.contains("${")) {
+ int lbrk = s.indexOf("${");
+ int rbrk = s.indexOf('}', lbrk);
+ if (rbrk < 0) break;
+ String prop = s.substring(lbrk+2, rbrk);
+ if (!propsDone.add(prop)) break;
+ String value = System.getProperty(prop);
+ if (verbose) System.err.println("expanding ${"+prop+"} => "+value);
+ if (value == null) break;
+ s = s.substring(0, lbrk) + value + s.substring(rbrk+1);
+ }
+ return s;
+ }
+
+ public void indify(String a) throws IOException {
+ File f = new File(a);
+ String fn = f.getName();
+ if (fn.endsWith(".class") && f.isFile())
+ indifyFile(f, dest);
+ else if (fn.endsWith(".jar") && f.isFile())
+ indifyJar(f, dest);
+ else if (f.isDirectory())
+ indifyTree(f, dest);
+ else if (!keepgoing)
+ throw new RuntimeException("unrecognized file: "+a);
+ }
+
+ private void ensureDirectory(File dir) {
+ if (dir.mkdirs() && !quiet)
+ System.err.println("created "+dir);
+ }
+
+ public void indifyFile(File f, File dest) throws IOException {
+ if (verbose) System.err.println("reading "+f);
+ ClassFile cf = new ClassFile(f);
+ Logic logic = new Logic(cf);
+ boolean changed = logic.transform();
+ logic.reportPatternMethods(quiet, keepgoing);
+ if (changed || all) {
+ File outfile;
+ if (dest != null) {
+ ensureDirectory(dest);
+ outfile = classPathFile(dest, cf.nameString());
+ } else {
+ outfile = f; // overwrite input file, no matter where it is
+ }
+ cf.writeTo(outfile);
+ if (!quiet) System.err.println("wrote "+outfile);
+ }
+ }
+
+ File classPathFile(File pathDir, String className) {
+ String qualname = className+".class";
+ qualname = qualname.replace('/', File.separatorChar);
+ return new File(pathDir, qualname);
+ }
+
+ public void indifyJar(File f, Object dest) throws IOException {
+ throw new UnsupportedOperationException("Not yet implemented");
+ }
+
+ public void indifyTree(File f, File dest) throws IOException {
+ if (verbose) System.err.println("reading directory: "+f);
+ for (File f2 : f.listFiles(new FilenameFilter() {
+ public boolean accept(File dir, String name) {
+ if (name.endsWith(".class")) return true;
+ if (name.contains(".")) return false;
+ // return true if it might be a package name:
+ return Character.isJavaIdentifierStart(name.charAt(0));
+ }})) {
+ if (f2.getName().endsWith(".class"))
+ indifyFile(f2, dest);
+ else if (f2.isDirectory())
+ indifyTree(f2, dest);
+ }
+ }
+
+ public ClassLoader makeClassLoader() {
+ return new Loader();
+ }
+ private class Loader extends ClassLoader {
+ Loader() {
+ this(Indify.class.getClassLoader());
+ }
+ Loader(ClassLoader parent) {
+ super(parent);
+ }
+ public Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
+ File f = findClassInPath(name);
+ if (f != null) {
+ try {
+ Class<?> c = transformAndLoadClass(f);
+ if (c != null) {
+ if (resolve) resolveClass(c);
+ return c;
+ }
+ } catch (Exception ex) {
+ if (ex instanceof IllegalArgumentException)
+ // pass error from reportPatternMethods
+ throw (IllegalArgumentException) ex;
+ }
+ }
+ return super.loadClass(name, resolve);
+ }
+ private File findClassInPath(String name) {
+ for (String s : classpath) {
+ File f = classPathFile(new File(s), name);
+ if (f.exists() && f.canRead()) {
+ return f;
+ }
+ }
+ return null;
+ }
+ protected Class<?> findClass(String name) throws ClassNotFoundException {
+ try {
+ return transformAndLoadClass(findClassInPath(name));
+ } catch (IOException ex) {
+ throw new ClassNotFoundException("IO error", ex);
+ }
+ }
+ private Class<?> transformAndLoadClass(File f) throws ClassNotFoundException, IOException {
+ if (verbose) System.out.println("Loading class from "+f);
+ ClassFile cf = new ClassFile(f);
+ Logic logic = new Logic(cf);
+ boolean changed = logic.transform();
+ if (verbose && !changed) System.out.println("(no change)");
+ logic.reportPatternMethods(!verbose, keepgoing);
+ byte[] bytes = cf.toByteArray();
+ return defineClass(null, bytes, 0, bytes.length);
+ }
+ }
+
+ private class Logic {
+ // Indify logic, per se.
+ ClassFile cf;
+ final char[] poolMarks;
+ final Map<Method,Constant> constants = new HashMap<>();
+ final Map<Method,String> indySignatures = new HashMap<>();
+ Logic(ClassFile cf) {
+ this.cf = cf;
+ poolMarks = new char[cf.pool.size()];
+ }
+ boolean transform() {
+ if (!initializeMarks()) return false;
+ if (!findPatternMethods()) return false;
+ Pool pool = cf.pool;
+ //for (Constant c : cp) System.out.println(" # "+c);
+ for (Method m : cf.methods) {
+ if (constants.containsKey(m)) continue; // don't bother
+ // Transform references.
+ int blab = 0;
+ for (Instruction i = m.instructions(); i != null; i = i.next()) {
+ if (i.bc != opc_invokestatic) continue;
+ int methi = i.u2At(1);
+ if (poolMarks[methi] == 0) continue;
+ Short[] ref = pool.getMemberRef((short)methi);
+ Method conm = findMember(cf.methods, ref[1], ref[2]);
+ if (conm == null) continue;
+ Constant con = constants.get(conm);
+ if (con == null) continue;
+ if (blab++ == 0 && !quiet)
+ System.err.println("patching "+cf.nameString()+"."+m);
+ //if (blab == 1) { for (Instruction j = m.instructions(); j != null; j = j.next()) System.out.println(" |"+j); }
+ if (con.tag == CONSTANT_InvokeDynamic ||
+ con.tag == CONSTANT_InvokeDynamic_17) {
+ // need to patch the following instruction too,
+ // but there are usually intervening argument pushes too
+ Instruction i2 = findPop(i);
+ Short[] ref2 = null;
+ short ref2i = 0;
+ if (i2 != null && i2.bc == opc_invokevirtual &&
+ poolMarks[(char)(ref2i = (short) i2.u2At(1))] == 'D')
+ ref2 = pool.getMemberRef(ref2i);
+ if (ref2 == null || !"invokeExact".equals(pool.getString(ref2[1]))) {
+ System.err.println(m+": failed to create invokedynamic at "+i.pc);
+ continue;
+ }
+ String invType = pool.getString(ref2[2]);
+ String bsmType = indySignatures.get(conm);
+ if (!invType.equals(bsmType)) {
+ System.err.println(m+": warning: "+conm+" call type and local invoke type differ: "
+ +bsmType+", "+invType);
+ }
+ assert(i.len == 3 || i2.len == 3);
+ if (!quiet) System.err.println(i+" "+conm+";...; "+i2+" => invokedynamic "+con);
+ int start = i.pc + 3, end = i2.pc;
+ System.arraycopy(i.codeBase, start, i.codeBase, i.pc, end-start);
+ i.forceNext(0); // force revisit of new instruction
+ i2.u1AtPut(-3, opc_invokedynamic);
+ i2.u2AtPut(-2, con.index);
+ i2.u2AtPut(0, (short)0);
+ i2.u1AtPut(2, opc_nop);
+ //System.out.println(new Instruction(i.codeBase, i2.pc-3));
+ } else {
+ if (!quiet) System.err.println(i+" "+conm+" => ldc "+con);
+ assert(i.len == 3);
+ i.u1AtPut(0, opc_ldc_w);
+ i.u2AtPut(1, con.index);
+ }
+ }
+ //if (blab >= 1) { for (Instruction j = m.instructions(); j != null; j = j.next()) System.out.println(" |"+j); }
+ }
+ cf.methods.removeAll(constants.keySet());
+ return true;
+ }
+
+ // Scan forward from the instruction to find where the stack p
+ // below the current sp at the instruction.
+ Instruction findPop(Instruction i) {
+ //System.out.println("findPop from "+i);
+ Pool pool = cf.pool;
+ JVMState jvm = new JVMState();
+ decode:
+ for (i = i.clone().next(); i != null; i = i.next()) {
+ String pops = INSTRUCTION_POPS[i.bc];
+ //System.out.println(" "+i+" "+jvm.stack+" : "+pops.replace("$", " => "));
+ if (pops == null) break;
+ if (jvm.stackMotion(i.bc)) continue decode;
+ if (pops.indexOf('Q') >= 0) {
+ Short[] ref = pool.getMemberRef((short) i.u2At(1));
+ String type = simplifyType(pool.getString(CONSTANT_Utf8, ref[2]));
+ switch (i.bc) {
+ case opc_getstatic:
+ case opc_getfield:
+ case opc_putstatic:
+ case opc_putfield:
+ pops = pops.replace("Q", type);
+ break;
+ default:
+ if (!type.startsWith("("))
+ throw new InternalError(i.toString());
+ pops = pops.replace("Q$Q", type.substring(1).replace(")","$"));
+ break;
+ }
+ //System.out.println("special type: "+type+" => "+pops);
+ }
+ int npops = pops.indexOf('$');
+ if (npops < 0) throw new InternalError();
+ if (npops > jvm.sp()) return i;
+ List<Object> args = jvm.args(npops);
+ int k = 0;
+ for (Object x : args) {
+ char have = (Character) x;
+ char want = pops.charAt(k++);
+ if (have == 'X' || want == 'X') continue;
+ if (have != want) break decode;
+ }
+ if (pops.charAt(k++) != '$') break decode;
+ args.clear();
+ while (k < pops.length())
+ args.add(pops.charAt(k++));
+ }
+ System.err.println("*** bailout on jvm: "+jvm.stack+" "+i);
+ return null;
+ }
+
+ boolean findPatternMethods() {
+ boolean found = false;
+ for (char mark : "THI".toCharArray()) {
+ for (Method m : cf.methods) {
+ if (!Modifier.isPrivate(m.access)) continue;
+ if (!Modifier.isStatic(m.access)) continue;
+ if (nameAndTypeMark(m.name, m.type) == mark) {
+ Constant con = scanPattern(m, mark);
+ if (con == null) continue;
+ constants.put(m, con);
+ found = true;
+ }
+ }
+ }
+ return found;
+ }
+
+ void reportPatternMethods(boolean quietly, boolean allowMatchFailure) {
+ if (!quietly && !constants.keySet().isEmpty())
+ System.err.println("pattern methods removed: "+constants.keySet());
+ for (Method m : cf.methods) {
+ if (nameMark(cf.pool.getString(m.name)) != 0 &&
+ constants.get(m) == null) {
+ String failure = "method has special name but fails to match pattern: "+m;
+ if (!allowMatchFailure)
+ throw new IllegalArgumentException(failure);
+ else if (!quietly)
+ System.err.println("warning: "+failure);
+ }
+ }
+ if (verifySpecifierCount >= 0) {
+ List<Object[]> specs = bootstrapMethodSpecifiers(false);
+ int specsLen = (specs == null ? 0 : specs.size());
+ if (specsLen != verifySpecifierCount) {
+ throw new IllegalArgumentException("BootstrapMethods length is "+specsLen+" but should be "+verifySpecifierCount);
+ }
+ }
+ }
+
+ // mark constant pool entries according to participation in patterns
+ boolean initializeMarks() {
+ boolean changed = false;
+ for (;;) {
+ boolean changed1 = false;
+ int cpindex = -1;
+ for (Constant e : cf.pool) {
+ ++cpindex;
+ if (e == null) continue;
+ char mark = poolMarks[cpindex];
+ if (mark != 0) continue;
+ switch (e.tag) {
+ case CONSTANT_Utf8:
+ mark = nameMark(e.itemString()); break;
+ case CONSTANT_NameAndType:
+ mark = nameAndTypeMark(e.itemIndexes()); break;
+ case CONSTANT_Class: {
+ int n1 = e.itemIndex();
+ char nmark = poolMarks[(char)n1];
+ if ("DJ".indexOf(nmark) >= 0)
+ mark = nmark;
+ break;
+ }
+ case CONSTANT_Field:
+ case CONSTANT_Method: {
+ Short[] n12 = e.itemIndexes();
+ short cl = n12[0];
+ short nt = n12[1];
+ char cmark = poolMarks[(char)cl];
+ if (cmark != 0) {
+ mark = cmark; // it is a java.dyn.* or java.lang.* method
+ break;
+ }
+ String cls = cf.pool.getString(CONSTANT_Class, cl);
+ if (cls.equals(cf.nameString())) {
+ switch (poolMarks[(char)nt]) {
+ // it is a private MH/MT/INDY method
+ case 'T': case 'H': case 'I':
+ mark = poolMarks[(char)nt];
+ break;
+ }
+ }
+ break;
+ }
+ default: break;
+ }
+ if (mark != 0) {
+ poolMarks[cpindex] = mark;
+ changed1 = true;
+ }
+ }
+ if (!changed1)
+ break;
+ changed = true;
+ }
+ return changed;
+ }
+ char nameMark(String s) {
+ if (s.startsWith("MT_")) return 'T';
+ else if (s.startsWith("MH_")) return 'H';
+ else if (s.startsWith("INDY_")) return 'I';
+ else if (s.startsWith("java/dyn/")) return 'D';
+ else if (s.startsWith("java/lang/")) return 'J';
+ return 0;
+ }
+ char nameAndTypeMark(Short[] n12) {
+ return nameAndTypeMark(n12[0], n12[1]);
+ }
+ char nameAndTypeMark(short n1, short n2) {
+ char mark = poolMarks[(char)n1];
+ if (mark == 0) return 0;
+ String descr = cf.pool.getString(CONSTANT_Utf8, n2);
+ String requiredType;
+ switch (poolMarks[(char)n1]) {
+ case 'H': requiredType = "()Ljava/dyn/MethodHandle;"; break;
+ case 'T': requiredType = "()Ljava/dyn/MethodType;"; break;
+ case 'I': requiredType = "()Ljava/dyn/MethodHandle;"; break;
+ default: return 0;
+ }
+ if (descr.equals(requiredType)) return mark;
+ return 0;
+ }
+
+ private class JVMState {
+ final List<Object> stack = new ArrayList<>();
+ int sp() { return stack.size(); }
+ void push(Object x) { stack.add(x); }
+ void push2(Object x) { stack.add(EMPTY_SLOT); stack.add(x); }
+ void pushAt(int pos, Object x) { stack.add(stack.size()+pos, x); }
+ Object pop() { return stack.remove(sp()-1); }
+ Object top() { return stack.get(sp()-1); }
+ List<Object> args(boolean hasRecv, String type) {
+ return args(argsize(type) + (hasRecv ? 1 : 0));
+ }
+ List<Object> args(int argsize) {
+ return stack.subList(sp()-argsize, sp());
+ }
+ boolean stackMotion(int bc) {
+ switch (bc) {
+ case opc_pop: pop(); break;
+ case opc_pop2: pop(); pop(); break;
+ case opc_swap: pushAt(-1, pop()); break;
+ case opc_dup: push(top()); break;
+ case opc_dup_x1: pushAt(-2, top()); break;
+ case opc_dup_x2: pushAt(-3, top()); break;
+ // ? also: dup2{,_x1,_x2}
+ default: return false;
+ }
+ return true;
+ }
+ }
+ private final String EMPTY_SLOT = "_";
+ private void removeEmptyJVMSlots(List<Object> args) {
+ for (;;) {
+ int i = args.indexOf(EMPTY_SLOT);
+ if (i >= 0 && i+1 < args.size()
+ && (isConstant(args.get(i+1), CONSTANT_Long) ||
+ isConstant(args.get(i+1), CONSTANT_Double)))
+ args.remove(i);
+ else break;
+ }
+ }
+
+ private Constant scanPattern(Method m, char patternMark) {
+ if (verbose) System.err.println("scan "+m+" for pattern="+patternMark);
+ int wantTag;
+ switch (patternMark) {
+ case 'T': wantTag = CONSTANT_MethodType; break;
+ case 'H': wantTag = CONSTANT_MethodHandle; break;
+ case 'I': wantTag = CONSTANT_InvokeDynamic; break;
+ default: throw new InternalError();
+ }
+ Instruction i = m.instructions();
+ JVMState jvm = new JVMState();
+ Pool pool = cf.pool;
+ int branchCount = 0;
+ Object arg;
+ List<Object> args;
+ List<Object> bsmArgs = null; // args to invokeGeneric
+ decode:
+ for (; i != null; i = i.next()) {
+ //System.out.println(jvm.stack+" "+i);
+ int bc = i.bc;
+ switch (bc) {
+ case opc_ldc: jvm.push(pool.get(i.u1At(1))); break;
+ case opc_ldc_w: jvm.push(pool.get(i.u2At(1))); break;
+ case opc_ldc2_w: jvm.push2(pool.get(i.u2At(1))); break;
+ case opc_aconst_null: jvm.push(null); break;
+ case opc_bipush: jvm.push((int)(byte) i.u1At(1)); break;
+ case opc_sipush: jvm.push((int)(short)i.u2At(1)); break;
+
+ // these support creation of a restarg array
+ case opc_anewarray:
+ arg = jvm.pop();
+ if (!(arg instanceof Integer)) break decode;
+ arg = Arrays.asList(new Object[(Integer)arg]);
+ jvm.push(arg);
+ break;
+ case opc_dup:
+ jvm.push(jvm.top()); break;
+ case opc_aastore:
+ args = jvm.args(3); // array, index, value
+ if (args.get(0) instanceof List &&
+ args.get(1) instanceof Integer) {
+ ((List<Object>)args.get(0)).set( (Integer)args.get(1), args.get(2) );
+ }
+ args.clear();
+ break;
+
+ case opc_getstatic:
+ {
+ // int.class compiles to getstatic Integer.TYPE
+ int fieldi = i.u2At(1);
+ char mark = poolMarks[fieldi];
+ //System.err.println("getstatic "+fieldi+Arrays.asList(pool.getStrings(pool.getMemberRef((short)fieldi)))+mark);
+ if (mark == 'J') {
+ Short[] ref = pool.getMemberRef((short) fieldi);
+ String name = pool.getString(CONSTANT_Utf8, ref[1]);
+ if ("TYPE".equals(name)) {
+ String wrapperName = pool.getString(CONSTANT_Class, ref[0]).replace('/', '.');
+ // a primitive type descriptor
+ Class<?> primClass;
+ try {
+ primClass = (Class<?>) Class.forName(wrapperName).getField(name).get(null);
+ } catch (Exception ex) {
+ throw new InternalError("cannot load "+wrapperName+"."+name);
+ }
+ jvm.push(primClass);
+ break;
+ }
+ }
+ // unknown field; keep going...
+ jvm.push(UNKNOWN_CON);
+ break;
+ }
+ case opc_putstatic:
+ {
+ if (patternMark != 'I') break decode;
+ jvm.pop();
+ // unknown field; keep going...
+ break;
+ }
+
+ case opc_invokestatic:
+ case opc_invokevirtual:
+ {
+ boolean hasRecv = (bc == opc_invokevirtual);
+ int methi = i.u2At(1);
+ char mark = poolMarks[methi];
+ Short[] ref = pool.getMemberRef((short)methi);
+ String type = pool.getString(CONSTANT_Utf8, ref[2]);
+ //System.out.println("invoke "+pool.getString(CONSTANT_Utf8, ref[1])+" "+Arrays.asList(ref)+" : "+type);
+ args = jvm.args(hasRecv, type);
+ String intrinsic = null;
+ Constant con;
+ if (mark == 'D' || mark == 'J') {
+ intrinsic = pool.getString(CONSTANT_Utf8, ref[1]);
+ if (mark == 'J') {
+ String cls = pool.getString(CONSTANT_Class, ref[0]);
+ cls = cls.substring(1+cls.lastIndexOf('/'));
+ intrinsic = cls+"."+intrinsic;
+ }
+ //System.out.println("recognized intrinsic "+intrinsic);
+ byte refKind = -1;
+ switch (intrinsic) {
+ case "findGetter": refKind = REF_getField; break;
+ case "findStaticGetter": refKind = REF_getStatic; break;
+ case "findSetter": refKind = REF_putField; break;
+ case "findStaticSetter": refKind = REF_putStatic; break;
+ case "findVirtual": refKind = REF_invokeVirtual; break;
+ case "findStatic": refKind = REF_invokeStatic; break;
+ case "findSpecial": refKind = REF_invokeSpecial; break;
+ case "findConstructor": refKind = REF_newInvokeSpecial; break;
+ }
+ if (refKind >= 0 && (con = parseMemberLookup(refKind, args)) != null) {
+ args.clear(); args.add(con);
+ continue;
+ }
+ }
+ Method ownMethod = null;
+ if (mark == 'T' || mark == 'H' || mark == 'I') {
+ ownMethod = findMember(cf.methods, ref[1], ref[2]);
+ }
+ switch (intrinsic == null ? "" : intrinsic) {
+ case "fromMethodDescriptorString":
+ con = makeMethodTypeCon(args.get(0));
+ args.clear(); args.add(con);
+ continue;
+ case "methodType": {
+ flattenVarargs(args); // there are several overloadings, some with varargs
+ StringBuilder buf = new StringBuilder();
+ String rtype = null;
+ for (Object typeArg : args) {
+ if (typeArg instanceof Class) {
+ Class<?> argClass = (Class<?>) typeArg;
+ if (argClass.isPrimitive()) {
+ char tchar;
+ switch (argClass.getName()) {
+ case "void": tchar = 'V'; break;
+ case "boolean": tchar = 'Z'; break;
+ case "byte": tchar = 'B'; break;
+ case "char": tchar = 'C'; break;
+ case "short": tchar = 'S'; break;
+ case "int": tchar = 'I'; break;
+ case "long": tchar = 'J'; break;
+ case "float": tchar = 'F'; break;
+ case "double": tchar = 'D'; break;
+ default: throw new InternalError(argClass.toString());
+ }
+ buf.append(tchar);
+ } else {
+ // should not happen, but...
+ buf.append('L').append(argClass.getName().replace('.','/')).append(';');
+ }
+ } else if (typeArg instanceof Constant) {
+ Constant argCon = (Constant) typeArg;
+ if (argCon.tag == CONSTANT_Class) {
+ String cn = pool.get(argCon.itemIndex()).itemString();
+ if (cn.endsWith(";"))
+ buf.append(cn);
+ else
+ buf.append('L').append(cn).append(';');
+ } else {
+ break decode;
+ }
+ } else {
+ break decode;
+ }
+ if (rtype == null) {
+ // first arg is treated differently
+ rtype = buf.toString();
+ buf.setLength(0);
+ buf.append('(');
+ }
+ }
+ buf.append(')').append(rtype);
+ con = con = makeMethodTypeCon(buf.toString());
+ args.clear(); args.add(con);
+ continue;
+ }
+ case "lookup":
+ case "dynamicInvoker":
+ args.clear(); args.add(intrinsic);
+ continue;
+ case "lookupClass":
+ if (args.equals(Arrays.asList("lookup"))) {
+ // fold lookup().lookupClass() to the enclosing class
+ args.clear(); args.add(pool.get(cf.thisc));
+ continue;
+ }
+ break;
+ case "invokeGeneric":
+ case "invokeWithArguments":
+ if (patternMark != 'I') break decode;
+ if ("invokeWithArguments".equals(intrinsic))
+ flattenVarargs(args);
+ bsmArgs = new ArrayList(args);
+ args.clear(); args.add("invokeGeneric");
+ continue;
+ case "Integer.valueOf":
+ case "Float.valueOf":
+ case "Long.valueOf":
+ case "Double.valueOf":
+ removeEmptyJVMSlots(args);
+ if (args.size() == 1) {
+ arg = args.remove(0);
+ assert(3456 == (CONSTANT_Integer*1000 + CONSTANT_Float*100 + CONSTANT_Long*10 + CONSTANT_Double));
+ if (isConstant(arg, CONSTANT_Integer + "IFLD".indexOf(intrinsic.charAt(0)))
+ || arg instanceof Number) {
+ args.add(arg); continue;
+ }
+ }
+ break decode;
+ }
+ if (!hasRecv && ownMethod != null && patternMark != 0) {
+ con = constants.get(ownMethod);
+ if (con == null) break decode;
+ args.clear(); args.add(con);
+ continue;
+ } else if (type.endsWith(")V")) {
+ // allow calls like println("reached the pattern method")
+ args.clear();
+ continue;
+ }
+ break decode; // bail out for most calls
+ }
+ case opc_areturn:
+ {
+ ++branchCount;
+ if (bsmArgs != null) {
+ // parse bsmArgs as (MH, lookup, String, MT, [extra])
+ Constant indyCon = makeInvokeDynamicCon(bsmArgs);
+ if (indyCon != null) {
+ Constant typeCon = (Constant) bsmArgs.get(3);
+ indySignatures.put(m, pool.getString(typeCon.itemIndex()));
+ return indyCon;
+ }
+ System.err.println(m+": inscrutable bsm arguments: "+bsmArgs);
+ break decode; // bail out
+ }
+ arg = jvm.pop();
+ if (branchCount == 2 && UNKNOWN_CON.equals(arg))
+ break; // merge to next path
+ if (isConstant(arg, wantTag))
+ return (Constant) arg;
+ break decode; // bail out
+ }
+ default:
+ if (jvm.stackMotion(i.bc)) break;
+ if (bc >= opc_nconst_MIN && bc <= opc_nconst_MAX)
+ { jvm.push(INSTRUCTION_CONSTANTS[bc - opc_nconst_MIN]); break; }
+ if (patternMark == 'I') {
+ // these support caching paths in INDY_x methods
+ if (bc == opc_aload || bc >= opc_aload_0 && bc <= opc_aload_MAX)
+ { jvm.push(UNKNOWN_CON); break; }
+ if (bc == opc_astore || bc >= opc_astore_0 && bc <= opc_astore_MAX)
+ { jvm.pop(); break; }
+ switch (bc) {
+ case opc_getfield:
+ case opc_aaload:
+ jvm.push(UNKNOWN_CON); break;
+ case opc_ifnull:
+ case opc_ifnonnull:
+ // ignore branch target
+ if (++branchCount != 1) break decode;
+ jvm.pop();
+ break;
+ case opc_checkcast:
+ arg = jvm.top();
+ if ("invokeWithArguments".equals(arg) ||
+ "invokeGeneric".equals(arg))
+ break; // assume it is a helpful cast
+ break decode;
+ default:
+ break decode; // bail out
+ }
+ continue decode; // go to next instruction
+ }
+ break decode; // bail out
+ } //end switch
+ }
+ System.err.println(m+": bailout on "+i+" jvm stack: "+jvm.stack);
+ return null;
+ }
+ private final String UNKNOWN_CON = "<unknown>";
+
+ private void flattenVarargs(List<Object> args) {
+ int size = args.size();
+ if (size > 0 && args.get(size-1) instanceof List)
+ args.addAll((List<Object>) args.remove(size-1));
+ }
+
+ private boolean isConstant(Object x, int tag) {
+ return x instanceof Constant && ((Constant)x).tag == tag;
+ }
+ private Constant makeMethodTypeCon(Object x) {
+ short utfIndex;
+ if (x instanceof String)
+ utfIndex = (short) cf.pool.addConstant(CONSTANT_Utf8, x).index;
+ else if (isConstant(x, CONSTANT_String))
+ utfIndex = ((Constant)x).itemIndex();
+ else return null;
+ return cf.pool.addConstant(CONSTANT_MethodType, utfIndex);
+ }
+ private Constant parseMemberLookup(byte refKind, List<Object> args) {
+ // E.g.: lookup().findStatic(Foo.class, "name", MethodType)
+ if (args.size() != 4) return null;
+ int argi = 0;
+ if (!"lookup".equals(args.get(argi++))) return null;
+ short refindex, cindex, ntindex, nindex, tindex;
+ Object con;
+ if (!isConstant(con = args.get(argi++), CONSTANT_Class)) return null;
+ cindex = (short)((Constant)con).index;
+ if (!isConstant(con = args.get(argi++), CONSTANT_String)) return null;
+ nindex = ((Constant)con).itemIndex();
+ if (isConstant(con = args.get(argi++), CONSTANT_MethodType) ||
+ isConstant(con, CONSTANT_Class)) {
+ tindex = ((Constant)con).itemIndex();
+ } else return null;
+ ntindex = (short) cf.pool.addConstant(CONSTANT_NameAndType,
+ new Short[]{ nindex, tindex }).index;
+ byte reftag = CONSTANT_Method;
+ if (refKind <= REF_putStatic)
+ reftag = CONSTANT_Field;
+ else if (refKind == REF_invokeInterface)
+ reftag = CONSTANT_InterfaceMethod;
+ Constant ref = cf.pool.addConstant(reftag, new Short[]{ cindex, ntindex });
+ return cf.pool.addConstant(CONSTANT_MethodHandle, new Object[]{ refKind, (short)ref.index });
+ }
+ private Constant makeInvokeDynamicCon(List<Object> args) {
+ // E.g.: MH_bsm.invokeGeneric(lookup(), "name", MethodType, "extraArg")
+ removeEmptyJVMSlots(args);
+ if (args.size() != 4 && args.size() != 5) return null;
+ int argi = 0;
+ short nindex, tindex, ntindex, bsmindex;
+ Object con;
+ if (!isConstant(con = args.get(argi++), CONSTANT_MethodHandle)) return null;
+ bsmindex = (short) ((Constant)con).index;
+ if (!"lookup".equals(args.get(argi++))) return null;
+ if (!isConstant(con = args.get(argi++), CONSTANT_String)) return null;
+ nindex = ((Constant)con).itemIndex();
+ if (!isConstant(con = args.get(argi++), CONSTANT_MethodType)) return null;
+ tindex = ((Constant)con).itemIndex();
+ ntindex = (short) cf.pool.addConstant(CONSTANT_NameAndType,
+ new Short[]{ nindex, tindex }).index;
+ if (transitionalJSR292) {
+ if (argi != args.size()) {
+ System.err.println("BSM specifier has extra arguments but transitionalJSR292=1");
+ return null;
+ }
+ return cf.pool.addConstant(CONSTANT_InvokeDynamic_17,
+ new Short[]{ bsmindex, ntindex });
+ }
+ List<Object> extraArgs = Collections.emptyList();
+ if (argi < args.size()) {
+ Object arg = args.get(argi);
+ if (arg instanceof List)
+ extraArgs = (List<Object>) arg;
+ else
+ extraArgs = Arrays.asList(arg);
+ removeEmptyJVMSlots(args);
+ }
+ List<Short> extraArgIndexes = new CountedList<>(Short.class);
+ for (Object x : extraArgs) {
+ if (x instanceof Number) {
+ Object num = null; byte numTag = 0;
+ if (x instanceof Integer) { num = x; numTag = CONSTANT_Integer; }
+ if (x instanceof Float) { num = Float.floatToRawIntBits((Float)x); numTag = CONSTANT_Float; }
+ if (x instanceof Long) { num = x; numTag = CONSTANT_Long; }
+ if (x instanceof Double) { num = Double.doubleToRawLongBits((Double)x); numTag = CONSTANT_Double; }
+ if (num != null) x = cf.pool.addConstant(numTag, x);
+ }
+ if (!(x instanceof Constant)) return null;
+ extraArgIndexes.add((short) ((Constant)x).index);
+ }
+ List<Object[]> specs = bootstrapMethodSpecifiers(true);
+ int specindex = -1;
+ Object[] spec = new Object[]{ bsmindex, extraArgIndexes };
+ for (Object[] spec1 : specs) {
+ if (Arrays.equals(spec1, spec)) {
+ specindex = specs.indexOf(spec1);
+ if (verbose) System.err.println("reusing BSM specifier: "+spec1[0]+spec1[1]);
+ break;
+ }
+ }
+ if (specindex == -1) {
+ specindex = (short) specs.size();
+ specs.add(spec);
+ if (verbose) System.err.println("adding BSM specifier: "+spec[0]+spec[1]);
+ }
+ return cf.pool.addConstant(CONSTANT_InvokeDynamic,
+ new Short[]{ (short)specindex, ntindex });
+ }
+
+ List<Object[]> bootstrapMethodSpecifiers(boolean createIfNotFound) {
+ Attr bsms = cf.findAttr("BootstrapMethods");
+ if (bsms == null) {
+ if (!createIfNotFound) return null;
+ bsms = new Attr(cf, "BootstrapMethods", new byte[]{0,0});
+ assert(bsms == cf.findAttr("BootstrapMethods"));
+ }
+ if (bsms.item instanceof byte[]) {
+ // unflatten
+ List<Object[]> specs = new CountedList<>(Object[].class);
+ DataInputStream in = new DataInputStream(new ByteArrayInputStream((byte[]) bsms.item));
+ try {
+ int len = (char) in.readShort();
+ for (int i = 0; i < len; i++) {
+ short bsm = in.readShort();
+ int argc = (char) in.readShort();
+ List<Short> argv = new CountedList<>(Short.class);
+ for (int j = 0; j < argc; j++)
+ argv.add(in.readShort());
+ specs.add(new Object[]{ bsm, argv });
+ }
+ } catch (IOException ex) { throw new InternalError(); }
+ bsms.item = specs;
+ }
+ return (List<Object[]>) bsms.item;
+ }
+ }
+
+ private DataInputStream openInput(File f) throws IOException {
+ return new DataInputStream(new BufferedInputStream(new FileInputStream(f)));
+ }
+
+ private DataOutputStream openOutput(File f) throws IOException {
+ if (!overwrite && f.exists())
+ throw new IOException("file already exists: "+f);
+ ensureDirectory(f.getParentFile());
+ return new DataOutputStream(new BufferedOutputStream(new FileOutputStream(f)));
+ }
+
+ static byte[] readRawBytes(DataInputStream in, int size) throws IOException {
+ byte[] bytes = new byte[size];
+ int nr = in.read(bytes);
+ if (nr != size)
+ throw new InternalError("wrong size: "+nr);
+ return bytes;
+ }
+
+ private interface Chunk {
+ void readFrom(DataInputStream in) throws IOException;
+ void writeTo(DataOutputStream out) throws IOException;
+ }
+
+ private static class CountedList<T> extends ArrayList<T> implements Chunk {
+ final Class<? extends T> itemClass;
+ final int rowlen;
+ CountedList(Class<? extends T> itemClass, int rowlen) {
+ this.itemClass = itemClass;
+ this.rowlen = rowlen;
+ }
+ CountedList(Class<? extends T> itemClass) { this(itemClass, -1); }
+ public void readFrom(DataInputStream in) throws IOException {
+ int count = in.readUnsignedShort();
+ while (size() < count) {
+ if (rowlen < 0) {
+ add(readInput(in, itemClass));
+ } else {
+ Class<?> elemClass = itemClass.getComponentType();
+ Object[] row = (Object[]) java.lang.reflect.Array.newInstance(elemClass, rowlen);
+ for (int i = 0; i < rowlen; i++)
+ row[i] = readInput(in, elemClass);
+ add(itemClass.cast(row));
+ }
+ }
+ }
+ public void writeTo(DataOutputStream out) throws IOException {
+ out.writeShort((short)size());
+ for (T item : this) {
+ writeOutput(out, item);
+ }
+ }
+ }
+
+ private static <T> T readInput(DataInputStream in, Class<T> dataClass) throws IOException {
+ Object data;
+ if (dataClass == Integer.class) {
+ data = in.readInt();
+ } else if (dataClass == Short.class) {
+ data = in.readShort();
+ } else if (dataClass == Byte.class) {
+ data = in.readByte();
+ } else if (dataClass == String.class) {
+ data = in.readUTF();
+ } else if (Chunk.class.isAssignableFrom(dataClass)) {
+ T obj;
+ try { obj = dataClass.newInstance(); }
+ catch (Exception ex) { throw new RuntimeException(ex); }
+ ((Chunk)obj).readFrom(in);
+ data = obj;
+ } else {
+ throw new InternalError("bad input datum: "+dataClass);
+ }
+ return dataClass.cast(data);
+ }
+ private static <T> T readInput(byte[] bytes, Class<T> dataClass) {
+ try {
+ return readInput(new DataInputStream(new ByteArrayInputStream(bytes)), dataClass);
+ } catch (IOException ex) {
+ throw new InternalError();
+ }
+ }
+ private static void readInputs(DataInputStream in, Object... data) throws IOException {
+ for (Object x : data) ((Chunk)x).readFrom(in);
+ }
+
+ private static void writeOutput(DataOutputStream out, Object data) throws IOException {
+ if (data == null) {
+ return;
+ } if (data instanceof Integer) {
+ out.writeInt((Integer)data);
+ } else if (data instanceof Long) {
+ out.writeLong((Long)data);
+ } else if (data instanceof Short) {
+ out.writeShort((Short)data);
+ } else if (data instanceof Byte) {
+ out.writeByte((Byte)data);
+ } else if (data instanceof String) {
+ out.writeUTF((String)data);
+ } else if (data instanceof byte[]) {
+ out.write((byte[])data);
+ } else if (data instanceof Object[]) {
+ for (Object x : (Object[]) data)
+ writeOutput(out, x);
+ } else if (data instanceof Chunk) {
+ Chunk x = (Chunk) data;
+ x.writeTo(out);
+ } else if (data instanceof List) {
+ for (Object x : (List<?>) data)
+ writeOutput(out, x);
+ } else {
+ throw new InternalError("bad output datum: "+data+" : "+data.getClass().getName());
+ }
+ }
+ private static void writeOutputs(DataOutputStream out, Object... data) throws IOException {
+ for (Object x : data) writeOutput(out, x);
+ }
+
+ public static abstract class Outer {
+ public abstract List<? extends Inner> inners();
+ protected void linkInners() {
+ for (Inner i : inners()) {
+ i.linkOuter(this);
+ if (i instanceof Outer)
+ ((Outer)i).linkInners();
+ }
+ }
+ public <T extends Outer> T outer(Class<T> c) {
+ for (Outer walk = this;; walk = ((Inner)walk).outer()) {
+ if (c.isInstance(walk))
+ return c.cast(walk);
+ //if (!(walk instanceof Inner)) return null;
+ }
+ }
+
+ public abstract List<Attr> attrs();
+ public Attr findAttr(String name) {
+ return findAttr(outer(ClassFile.class).pool.stringIndex(name, false));
+ }
+ public Attr findAttr(int name) {
+ if (name == 0) return null;
+ for (Attr a : attrs()) {
+ if (a.name == name) return a;
+ }
+ return null;
+ }
+ }
+ public interface Inner { Outer outer(); void linkOuter(Outer o); }
+ public static abstract class InnerOuter extends Outer implements Inner {
+ public Outer outer;
+ public Outer outer() { return outer; }
+ public void linkOuter(Outer o) { assert(outer == null); outer = o; }
+ }
+ public static class Constant<T> implements Chunk {
+ public final byte tag;
+ public final T item;
+ public final int index;
+ public Constant(int index, byte tag, T item) {
+ this.index = index;
+ this.tag = tag;
+ this.item = item;
+ }
+ public Constant checkTag(byte tag) {
+ if (this.tag != tag) throw new InternalError(this.toString());
+ return this;
+ }
+ public String itemString() { return (String)item; }
+ public Short itemIndex() { return (Short)item; }
+ public Short[] itemIndexes() { return (Short[])item; }
+ public void readFrom(DataInputStream in) throws IOException {
+ throw new InternalError("do not call");
+ }
+ public void writeTo(DataOutputStream out) throws IOException {
+ writeOutputs(out, tag, item);
+ }
+ public boolean equals(Object x) { return (x instanceof Constant && equals((Constant)x)); }
+ public boolean equals(Constant that) {
+ return (this.tag == that.tag && this.itemAsComparable().equals(that.itemAsComparable()));
+ }
+ public int hashCode() { return (tag * 31) + this.itemAsComparable().hashCode(); }
+ public Object itemAsComparable() {
+ switch (tag) {
+ case CONSTANT_Double: return Double.longBitsToDouble((Long)item);
+ case CONSTANT_Float: return Float.intBitsToFloat((Integer)item);
+ }
+ return (item instanceof Object[] ? Arrays.asList((Object[])item) : item);
+ }
+ public String toString() {
+ String itstr = String.valueOf(itemAsComparable());
+ return (index + ":" + tagName(tag) + (itstr.startsWith("[")?"":"=") + itstr);
+ }
+ private static String[] TAG_NAMES;
+ public static String tagName(byte tag) { // used for error messages
+ if (TAG_NAMES == null)
+ TAG_NAMES = ("None Utf8 Unicode Integer Float Long Double Class String"
+ +" Fieldref Methodref InterfaceMethodref NameAndType #13 #14"
+ +" MethodHandle MethodType InvokeDynamic#17 InvokeDynamic").split(" ");
+ if ((tag & 0xFF) >= TAG_NAMES.length) return "#"+(tag & 0xFF);
+ return TAG_NAMES[tag & 0xFF];
+ }
+ }
+
+ public static class Pool extends CountedList<Constant> implements Chunk {
+ private Map<String,Short> strings = new TreeMap<>();
+
+ public Pool() {
+ super(Constant.class);
+ }
+ public void readFrom(DataInputStream in) throws IOException {
+ int count = in.readUnsignedShort();
+ add(null); // always ignore first item
+ while (size() < count) {
+ readConstant(in);
+ }
+ }
+ public <T> Constant<T> addConstant(byte tag, T item) {
+ Constant<T> con = new Constant<>(size(), tag, item);
+ int idx = indexOf(con);
+ if (idx >= 0) return get(idx);
+ add(con);
+ if (tag == CONSTANT_Utf8) strings.put((String)item, (short) con.index);
+ return con;
+ }
+ private void readConstant(DataInputStream in) throws IOException {
+ byte tag = in.readByte();
+ int index = size();
+ Object arg;
+ switch (tag) {
+ case CONSTANT_Utf8:
+ arg = in.readUTF();
+ strings.put((String) arg, (short) size());
+ break;
+ case CONSTANT_Integer:
+ case CONSTANT_Float:
+ arg = in.readInt(); break;
+ case CONSTANT_Long:
+ case CONSTANT_Double:
+ add(new Constant(index, tag, in.readLong()));
+ add(null);
+ return;
+ case CONSTANT_Class:
+ case CONSTANT_String:
+ arg = in.readShort(); break;
+ case CONSTANT_Field:
+ case CONSTANT_Method:
+ case CONSTANT_InterfaceMethod:
+ case CONSTANT_NameAndType:
+ case CONSTANT_InvokeDynamic_17:
+ case CONSTANT_InvokeDynamic:
+ // read an ordered pair
+ arg = new Short[] { in.readShort(), in.readShort() };
+ break;
+ case CONSTANT_MethodHandle:
+ // read an ordered pair; first part is a u1 (not u2)
+ arg = new Object[] { in.readByte(), in.readShort() };
+ break;
+ case CONSTANT_MethodType:
+ arg = in.readShort(); break;
+ default:
+ throw new InternalError("bad CP tag "+tag);
+ }
+ add(new Constant(index, tag, arg));
+ }
+
+ // Access:
+ public Constant get(int index) {
+ // extra 1-bits get into the shorts
+ return super.get((char) index);
+ }
+ String getString(byte tag, short index) {
+ get(index).checkTag(tag);
+ return getString(index);
+ }
+ String getString(short index) {
+ Object v = get(index).item;
+ if (v instanceof Short)
+ v = get((Short)v).checkTag(CONSTANT_Utf8).item;
+ return (String) v;
+ }
+ String[] getStrings(Short[] indexes) {
+ String[] res = new String[indexes.length];
+ for (int i = 0; i < indexes.length; i++)
+ res[i] = getString(indexes[i]);
+ return res;
+ }
+ int stringIndex(String name, boolean createIfNotFound) {
+ Short x = strings.get(name);
+ if (x != null) return (char)(int) x;
+ if (!createIfNotFound) return 0;
+ return addConstant(CONSTANT_Utf8, name).index;
+ }
+ Short[] getMemberRef(short index) {
+ Short[] cls_nnt = get(index).itemIndexes();
+ Short[] name_type = get(cls_nnt[1]).itemIndexes();
+ return new Short[]{ cls_nnt[0], name_type[0], name_type[1] };
+ }
+ }
+
+ public class ClassFile extends Outer implements Chunk {
+ ClassFile(File f) throws IOException {
+ DataInputStream in = openInput(f);
+ try {
+ readFrom(in);
+ } finally {
+ if (in != null) in.close();
+ }
+ }
+
+ public int magic, version; // <min:maj>
+ public final Pool pool = new Pool();
+ public short access, thisc, superc;
+ public final List<Short> interfaces = new CountedList<>(Short.class);
+ public final List<Field> fields = new CountedList<>(Field.class);
+ public final List<Method> methods = new CountedList<>(Method.class);
+ public final List<Attr> attrs = new CountedList<>(Attr.class);
+
+ public final void readFrom(DataInputStream in) throws IOException {
+ magic = in.readInt(); version = in.readInt();
+ if (magic != 0xCAFEBABE) throw new IOException("bad magic number");
+ pool.readFrom(in);
+ Code_index = pool.stringIndex("Code", false);
+ access = in.readShort(); thisc = in.readShort(); superc = in.readShort();
+ readInputs(in, interfaces, fields, methods, attrs);
+ if (in.read() >= 0) throw new IOException("junk after end of file");
+ linkInners();
+ }
+
+ void writeTo(File f) throws IOException {
+ DataOutputStream out = openOutput(f);
+ try {
+ writeTo(out);
+ } finally {
+ out.close();
+ }
+ }
+
+ public void writeTo(DataOutputStream out) throws IOException {
+ writeOutputs(out, magic, version, pool,
+ access, thisc, superc, interfaces,
+ fields, methods, attrs);
+ }
+
+ public byte[] toByteArray() {
+ try {
+ ByteArrayOutputStream buf = new ByteArrayOutputStream();
+ writeTo(new DataOutputStream(buf));
+ return buf.toByteArray();
+ } catch (IOException ex) {
+ throw new InternalError();
+ }
+ }
+
+ public List<Inner> inners() {
+ List<Inner> inns = new ArrayList<>();
+ inns.addAll(fields); inns.addAll(methods); inns.addAll(attrs);
+ return inns;
+ }
+ public List<Attr> attrs() { return attrs; }
+
+ // derived stuff:
+ public String nameString() { return pool.getString(CONSTANT_Class, thisc); }
+ int Code_index;
+ }
+
+ private static <T extends Member> T findMember(List<T> mems, int name, int type) {
+ if (name == 0 || type == 0) return null;
+ for (T m : mems) {
+ if (m.name == name && m.type == type) return m;
+ }
+ return null;
+ }
+
+ public static class Member extends InnerOuter implements Chunk {
+ public short access, name, type;
+ public final List<Attr> attrs = new CountedList<>(Attr.class);
+ public void readFrom(DataInputStream in) throws IOException {
+ access = in.readShort(); name = in.readShort(); type = in.readShort();
+ readInputs(in, attrs);
+ }
+ public void writeTo(DataOutputStream out) throws IOException {
+ writeOutputs(out, access, name, type, attrs);
+ }
+ public List<Attr> inners() { return attrs; }
+ public List<Attr> attrs() { return attrs; }
+ public ClassFile outer() { return (ClassFile) outer; }
+ public String nameString() { return outer().pool.getString(CONSTANT_Utf8, name); }
+ public String typeString() { return outer().pool.getString(CONSTANT_Utf8, type); }
+ public String toString() {
+ if (outer == null) return super.toString();
+ return nameString() + (this instanceof Method ? "" : ":")
+ + simplifyType(typeString());
+ }
+ }
+ public static class Field extends Member {
+ }
+ public static class Method extends Member {
+ public Code code() {
+ Attr a = findAttr("Code");
+ if (a == null) return null;
+ return (Code) a.item;
+ }
+ public Instruction instructions() {
+ Code code = code();
+ if (code == null) return null;
+ return code.instructions();
+ }
+ }
+
+ public static class Attr extends InnerOuter implements Chunk {
+ public short name;
+ public int size = -1; // no pre-declared size
+ public Object item;
+
+ public Attr() {}
+ public Attr(Outer outer, String name, Object item) {
+ ClassFile cf = outer.outer(ClassFile.class);
+ linkOuter(outer);
+ this.name = (short) cf.pool.stringIndex(name, true);
+ this.item = item;
+ outer.attrs().add(this);
+ }
+ public void readFrom(DataInputStream in) throws IOException {
+ name = in.readShort();
+ size = in.readInt();
+ item = readRawBytes(in, size);
+ }
+ public void writeTo(DataOutputStream out) throws IOException {
+ out.writeShort(name);
+ // write the 4-byte size header and then the contents:
+ byte[] bytes;
+ int trueSize;
+ if (item instanceof byte[]) {
+ bytes = (byte[]) item;
+ out.writeInt(trueSize = bytes.length);
+ out.write(bytes);
+ } else {
+ trueSize = flatten(out);
+ }
+ if (trueSize != size && size >= 0)
+ System.err.println("warning: attribute size changed "+size+" to "+trueSize);
+ }
+ public void linkOuter(Outer o) {
+ super.linkOuter(o);
+ if (item instanceof byte[] &&
+ outer instanceof Method &&
+ ((Method)outer).outer().Code_index == name) {
+ item = readInput((byte[])item, Code.class);
+ }
+ }
+ public List<Inner> inners() {
+ if (item instanceof Inner)
+ return Collections.nCopies(1, (Inner)item);
+ return Collections.emptyList();
+ }
+ public List<Attr> attrs() { return null; } // Code overrides this
+ public byte[] flatten() {
+ ByteArrayOutputStream buf = new ByteArrayOutputStream(size);
+ flatten(buf);
+ return buf.toByteArray();
+ }
+ public int flatten(DataOutputStream out) throws IOException {
+ ByteArrayOutputStream buf = new ByteArrayOutputStream(Math.max(20, size));
+ int trueSize = flatten(buf);
+ out.writeInt(trueSize);
+ buf.writeTo(out);
+ return trueSize;
+ }
+ private int flatten(ByteArrayOutputStream buf) {
+ try {
+ writeOutput(new DataOutputStream(buf), item);
+ return buf.size();
+ } catch (IOException ex) {
+ throw new InternalError();
+ }
+ }
+ public String nameString() {
+ ClassFile cf = outer(ClassFile.class);
+ if (cf == null) return "#"+name;
+ return cf.pool.getString(name);
+ }
+ public String toString() {
+ return nameString()+(size < 0 ? "=" : "["+size+"]=")+item;
+ }
+ }
+
+ public static class Code extends InnerOuter implements Chunk {
+ public short stacks, locals;
+ public byte[] bytes;
+ public final List<Short[]> etable = new CountedList<>(Short[].class, 4);
+ public final List<Attr> attrs = new CountedList<>(Attr.class);
+ // etable[N] = (N)*{ startpc, endpc, handlerpc, catchtype }
+ public void readFrom(DataInputStream in) throws IOException {
+ stacks = in.readShort(); locals = in.readShort();
+ bytes = readRawBytes(in, in.readInt());
+ readInputs(in, etable, attrs);
+ }
+ public void writeTo(DataOutputStream out) throws IOException {
+ writeOutputs(out, stacks, locals, bytes.length, bytes, etable, attrs);
+ }
+ public List<Attr> inners() { return attrs; }
+ public List<Attr> attrs() { return attrs; }
+ public Instruction instructions() {
+ return new Instruction(bytes, 0);
+ }
+ }
+
+ // lots of constants
+ private static final byte
+ CONSTANT_Utf8 = 1,
+ CONSTANT_Integer = 3,
+ CONSTANT_Float = 4,
+ CONSTANT_Long = 5,
+ CONSTANT_Double = 6,
+ CONSTANT_Class = 7,
+ CONSTANT_String = 8,
+ CONSTANT_Field = 9,
+ CONSTANT_Method = 10,
+ CONSTANT_InterfaceMethod = 11,
+ CONSTANT_NameAndType = 12,
+ CONSTANT_MethodHandle = 15, // JSR 292
+ CONSTANT_MethodType = 16, // JSR 292
+ CONSTANT_InvokeDynamic_17 = 17, // JSR 292, only occurs in old class files
+ CONSTANT_InvokeDynamic = 18; // JSR 292
+ private static final byte
+ REF_getField = 1,
+ REF_getStatic = 2,
+ REF_putField = 3,
+ REF_putStatic = 4,
+ REF_invokeVirtual = 5,
+ REF_invokeStatic = 6,
+ REF_invokeSpecial = 7,
+ REF_newInvokeSpecial = 8,
+ REF_invokeInterface = 9;
+
+ private static final int
+ opc_nop = 0,
+ opc_aconst_null = 1,
+ opc_nconst_MIN = 2, // iconst_m1
+ opc_nconst_MAX = 15, // dconst_1
+ opc_bipush = 16,
+ opc_sipush = 17,
+ opc_ldc = 18,
+ opc_ldc_w = 19,
+ opc_ldc2_w = 20,
+ opc_aload = 25,
+ opc_aload_0 = 42,
+ opc_aload_MAX = 45,
+ opc_aaload = 50,
+ opc_astore = 58,
+ opc_astore_0 = 75,
+ opc_astore_MAX = 78,
+ opc_aastore = 83,
+ opc_pop = 87,
+ opc_pop2 = 88,
+ opc_dup = 89,
+ opc_dup_x1 = 90,
+ opc_dup_x2 = 91,
+ opc_dup2 = 92,
+ opc_dup2_x1 = 93,
+ opc_dup2_x2 = 94,
+ opc_swap = 95,
+ opc_tableswitch = 170,
+ opc_lookupswitch = 171,
+ opc_areturn = 176,
+ opc_getstatic = 178,
+ opc_putstatic = 179,
+ opc_getfield = 180,
+ opc_putfield = 181,
+ opc_invokevirtual = 182,
+ opc_invokespecial = 183,
+ opc_invokestatic = 184,
+ opc_invokeinterface = 185,
+ opc_invokedynamic = 186,
+ opc_anewarray = 189,
+ opc_checkcast = 192,
+ opc_ifnull = 198,
+ opc_ifnonnull = 199,
+ opc_wide = 196;
+
+ private static final Object[] INSTRUCTION_CONSTANTS = {
+ -1, 0, 1, 2, 3, 4, 5, 0L, 1L, 0.0F, 1.0F, 2.0F, 0.0D, 1.0D
+ };
+
+ private static final String INSTRUCTION_FORMATS =
+ "nop$ aconst_null$L iconst_m1$I iconst_0$I iconst_1$I "+
+ "iconst_2$I iconst_3$I iconst_4$I iconst_5$I lconst_0$J_ "+
+ "lconst_1$J_ fconst_0$F fconst_1$F fconst_2$F dconst_0$D_ "+
+ "dconst_1$D_ bipush=bx$I sipush=bxx$I ldc=bk$X ldc_w=bkk$X "+
+ "ldc2_w=bkk$X_ iload=bl/wbll$I lload=bl/wbll$J_ fload=bl/wbll$F "+
+ "dload=bl/wbll$D_ aload=bl/wbll$L iload_0$I iload_1$I "+
+ "iload_2$I iload_3$I lload_0$J_ lload_1$J_ lload_2$J_ "+
+ "lload_3$J_ fload_0$F fload_1$F fload_2$F fload_3$F dload_0$D_ "+
+ "dload_1$D_ dload_2$D_ dload_3$D_ aload_0$L aload_1$L "+
+ "aload_2$L aload_3$L iaload$LI$I laload$LI$J_ faload$LI$F "+
+ "daload$LI$D_ aaload$LI$L baload$LI$I caload$LI$I saload$LI$I "+
+ "istore=bl/wbll$I$ lstore=bl/wbll$J_$ fstore=bl/wbll$F$ "+
+ "dstore=bl/wbll$D_$ astore=bl/wbll$L$ istore_0$I$ istore_1$I$ "+
+ "istore_2$I$ istore_3$I$ lstore_0$J_$ lstore_1$J_$ "+
+ "lstore_2$J_$ lstore_3$J_$ fstore_0$F$ fstore_1$F$ fstore_2$F$ "+
+ "fstore_3$F$ dstore_0$D_$ dstore_1$D_$ dstore_2$D_$ "+
+ "dstore_3$D_$ astore_0$L$ astore_1$L$ astore_2$L$ astore_3$L$ "+
+ "iastore$LII$ lastore$LIJ_$ fastore$LIF$ dastore$LID_$ "+
+ "aastore$LIL$ bastore$LII$ castore$LII$ sastore$LII$ pop$X$ "+
+ "pop2$XX$ dup$X$XX dup_x1$XX$XXX dup_x2$XXX$XXXX dup2$XX$XXXX "+
+ "dup2_x1$XXX$XXXXX dup2_x2$XXXX$XXXXXX swap$XX$XX "+
+ "iadd$II$I ladd$J_J_$J_ fadd$FF$F dadd$D_D_$D_ isub$II$I "+
+ "lsub$J_J_$J_ fsub$FF$F dsub$D_D_$D_ imul$II$I lmul$J_J_$J_ "+
+ "fmul$FF$F dmul$D_D_$D_ idiv$II$I ldiv$J_J_$J_ fdiv$FF$F "+
+ "ddiv$D_D_$D_ irem$II$I lrem$J_J_$J_ frem$FF$F drem$D_D_$D_ "+
+ "ineg$I$I lneg$J_$J_ fneg$F$F dneg$D_$D_ ishl$II$I lshl$J_I$J_ "+
+ "ishr$II$I lshr$J_I$J_ iushr$II$I lushr$J_I$J_ iand$II$I "+
+ "land$J_J_$J_ ior$II$I lor$J_J_$J_ ixor$II$I lxor$J_J_$J_ "+
+ "iinc=blx/wbllxx$ i2l$I$J_ i2f$I$F i2d$I$D_ l2i$J_$I l2f$J_$F "+
+ "l2d$J_$D_ f2i$F$I f2l$F$J_ f2d$F$D_ d2i$D_$I d2l$D_$J_ "+
+ "d2f$D_$F i2b$I$I i2c$I$I i2s$I$I lcmp fcmpl fcmpg dcmpl dcmpg "+
+ "ifeq=boo ifne=boo iflt=boo ifge=boo ifgt=boo ifle=boo "+
+ "if_icmpeq=boo if_icmpne=boo if_icmplt=boo if_icmpge=boo "+
+ "if_icmpgt=boo if_icmple=boo if_acmpeq=boo if_acmpne=boo "+
+ "goto=boo jsr=boo ret=bl/wbll tableswitch=* lookupswitch=* "+
+ "ireturn lreturn freturn dreturn areturn return "+
+ "getstatic=bkf$Q putstatic=bkf$Q$ getfield=bkf$L$Q "+
+ "putfield=bkf$LQ$ invokevirtual=bkm$LQ$Q "+
+ "invokespecial=bkm$LQ$Q invokestatic=bkm$Q$Q "+
+ "invokeinterface=bkixx$LQ$Q invokedynamic=bkd__$Q$Q new=bkc$L "+
+ "newarray=bx$I$L anewarray=bkc$I$L arraylength$L$I athrow "+
+ "checkcast=bkc$L$L instanceof=bkc$L$I monitorenter$L "+
+ "monitorexit$L wide=* multianewarray=bkcx ifnull=boo "+
+ "ifnonnull=boo goto_w=boooo jsr_w=boooo ";
+ private static final String[] INSTRUCTION_NAMES;
+ private static final String[] INSTRUCTION_POPS;
+ private static final int[] INSTRUCTION_INFO;
+ static {
+ String[] insns = INSTRUCTION_FORMATS.split(" ");
+ assert(insns[opc_lookupswitch].startsWith("lookupswitch"));
+ assert(insns[opc_tableswitch].startsWith("tableswitch"));
+ assert(insns[opc_wide].startsWith("wide"));
+ assert(insns[opc_invokedynamic].startsWith("invokedynamic"));
+ int[] info = new int[256];
+ String[] names = new String[256];
+ String[] pops = new String[256];
+ for (int i = 0; i < insns.length; i++) {
+ String insn = insns[i];
+ int dl = insn.indexOf('$');
+ if (dl > 0) {
+ String p = insn.substring(dl+1);
+ if (p.indexOf('$') < 0) p = "$" + p;
+ pops[i] = p;
+ insn = insn.substring(0, dl);
+ }
+ int eq = insn.indexOf('=');
+ if (eq < 0) {
+ info[i] = 1;
+ names[i] = insn;
+ continue;
+ }
+ names[i] = insn.substring(0, eq);
+ String fmt = insn.substring(eq+1);
+ if (fmt.equals("*")) {
+ info[i] = 0;
+ continue;
+ }
+ int sl = fmt.indexOf('/');
+ if (sl < 0) {
+ info[i] = (char) fmt.length();
+ } else {
+ String wfmt = fmt.substring(sl+1);
+ fmt = fmt.substring(0, sl);
+ info[i] = (char)( fmt.length() + (wfmt.length() * 16) );
+ }
+ }
+ INSTRUCTION_INFO = info;
+ INSTRUCTION_NAMES = names;
+ INSTRUCTION_POPS = pops;
+ }
+
+ public static class Instruction implements Cloneable {
+ byte[] codeBase;
+ int pc;
+ int bc;
+ int info;
+ int wide;
+ int len;
+ Instruction(byte[] codeBase, int pc) {
+ this.codeBase = codeBase;
+ init(pc);
+ }
+ public Instruction clone() {
+ try {
+ return (Instruction) super.clone();
+ } catch (CloneNotSupportedException ex) {
+ throw new InternalError();
+ }
+ }
+ private Instruction init(int pc) {
+ this.pc = pc;
+ this.bc = codeBase[pc] & 0xFF;
+ this.info = INSTRUCTION_INFO[bc];
+ this.wide = 0;
+ this.len = (info & 0x0F);
+ if (len == 0)
+ computeLength();
+ return this;
+ }
+ Instruction next() {
+ if (len == 0 && bc != 0) throw new InternalError();
+ int npc = pc + len;
+ if (npc == codeBase.length)
+ return null;
+ return init(npc);
+ }
+ void forceNext(int newLen) {
+ bc = opc_nop;
+ len = newLen;
+ }
+
+ public String toString() {
+ StringBuilder buf = new StringBuilder();
+ buf.append(pc).append(":").append(INSTRUCTION_NAMES[bc]);
+ switch (len) {
+ case 3: buf.append(" ").append(u2At(1)); break;
+ case 5: buf.append(" ").append(u2At(1)).append(" ").append(u2At(3)); break;
+ default: for (int i = 1; i < len; i++) buf.append(" ").append(u1At(1));
+ }
+ return buf.toString();
+ }
+
+ // these are the hard parts
+ private void computeLength() {
+ int cases;
+ switch (bc) {
+ case opc_wide:
+ bc = codeBase[pc + 1];
+ info = INSTRUCTION_INFO[bc];
+ len = ((info >> 4) & 0x0F);
+ if (len == 0) throw new RuntimeException("misplaced wide bytecode: "+bc);
+ return;
+
+ case opc_tableswitch:
+ cases = (u4At(alignedIntOffset(2)) - u4At(alignedIntOffset(1)) + 1);
+ len = alignedIntOffset(3 + cases*1);
+ return;
+
+ case opc_lookupswitch:
+ cases = u4At(alignedIntOffset(1));
+ len = alignedIntOffset(2 + cases*2);
+ return;
+
+ default:
+ throw new RuntimeException("unknown bytecode: "+bc);
+ }
+ }
+ // switch code
+ // clget the Nth int (where 0 is the first after the opcode itself)
+ public int alignedIntOffset(int n) {
+ int pos = pc + 1;
+ pos += ((-pos) & 0x03); // align it
+ pos += (n * 4);
+ return pos - pc;
+ }
+ public int u1At(int pos) {
+ return (codeBase[pc+pos] & 0xFF);
+ }
+ public int u2At(int pos) {
+ return (u1At(pos+0)<<8) + u1At(pos+1);
+ }
+ public int u4At(int pos) {
+ return (u2At(pos+0)<<16) + u2At(pos+2);
+ }
+ public void u1AtPut(int pos, int x) {
+ codeBase[pc+pos] = (byte)x;
+ }
+ public void u2AtPut(int pos, int x) {
+ codeBase[pc+pos+0] = (byte)(x >> 8);
+ codeBase[pc+pos+1] = (byte)(x >> 0);
+ }
+ }
+
+ static String simplifyType(String type) {
+ String simpleType = OBJ_SIGNATURE.matcher(type).replaceAll("L");
+ assert(simpleType.matches("^\\([A-Z]*\\)[A-Z]$"));
+ // change (DD)D to (D_D_)D_
+ simpleType = WIDE_SIGNATURE.matcher(simpleType).replaceAll("\\0_");
+ return simpleType;
+ }
+ static int argsize(String type) {
+ return simplifyType(type).length()-3;
+ }
+ private static final Pattern OBJ_SIGNATURE = Pattern.compile("\\[*L[^;]*;|\\[+[A-Z]");
+ private static final Pattern WIDE_SIGNATURE = Pattern.compile("[JD]");
+}