--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/lang/invoke/PrivateInvokeTest.java Tue Jul 24 10:47:44 2012 -0700
@@ -0,0 +1,376 @@
+/*
+ * Copyright (c) 2009, 2011, 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 white-box testing of method handle sub-primitives
+ * @run junit test.java.lang.invoke.PrivateInvokeTest
+ */
+
+package test.java.lang.invoke;
+
+import java.lang.invoke.*;
+import static java.lang.invoke.MethodHandles.*;
+import static java.lang.invoke.MethodType.*;
+import java.lang.reflect.*;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import org.junit.*;
+import static org.junit.Assert.*;
+
+public class PrivateInvokeTest {
+ // Utility functions
+ private static final Lookup LOOKUP = lookup();
+ private static final Class<?> THIS_CLASS = PrivateInvokeTest.class;
+ private static final int
+ REF_NONE = 0, // null value
+ 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,
+ REF_LIMIT = 10,
+ REF_MH_invokeBasic = REF_NONE;;
+ private static final String[] REF_KIND_NAMES = {
+ "MH::invokeBasic",
+ "REF_getField", "REF_getStatic", "REF_putField", "REF_putStatic",
+ "REF_invokeVirtual", "REF_invokeStatic", "REF_invokeSpecial",
+ "REF_newInvokeSpecial", "REF_invokeInterface"
+ };
+ private int verbose;
+ //{ verbose = 99; } // for debugging
+ {
+ String vstr = System.getProperty(THIS_CLASS.getSimpleName()+".verbose");
+ if (vstr == null)
+ vstr = System.getProperty(THIS_CLASS.getName()+".verbose");
+ if (vstr == null)
+ vstr = System.getProperty("test.verbose");
+ if (vstr != null) verbose = Integer.parseInt(vstr);
+ }
+ private static int referenceKind(Method m) {
+ if (Modifier.isStatic(m.getModifiers()))
+ return REF_invokeStatic;
+ else if (m.getDeclaringClass().isInterface())
+ return REF_invokeInterface;
+ else if (Modifier.isFinal(m.getModifiers()) ||
+ Modifier.isFinal(m.getDeclaringClass().getModifiers()))
+ return REF_invokeSpecial;
+ else
+ return REF_invokeVirtual;
+ }
+ private static MethodType basicType(MethodType mtype) {
+ MethodType btype = mtype.erase();
+ if (btype.hasPrimitives()) {
+ for (int i = -1; i < mtype.parameterCount(); i++) {
+ Class<?> type = (i < 0 ? mtype.returnType() : mtype.parameterType(i));
+ if (type == boolean.class ||
+ type == byte.class ||
+ type == char.class ||
+ type == short.class) {
+ type = int.class;
+ if (i < 0)
+ btype = btype.changeReturnType(type);
+ else
+ btype = btype.changeParameterType(i, type);
+ }
+ }
+ }
+ return btype;
+ }
+ private static Method getMethod(Class<?> defc, String name, Class<?>... ptypes) {
+ try {
+ return defc.getDeclaredMethod(name, ptypes);
+ } catch (NoSuchMethodException ex) {
+ }
+ try {
+ return defc.getMethod(name, ptypes);
+ } catch (NoSuchMethodException ex) {
+ throw new IllegalArgumentException(ex);
+ }
+ }
+ private static MethodHandle unreflect(Method m) {
+ try {
+ MethodHandle mh = LOOKUP.unreflect(m);
+ if (Modifier.isTransient(m.getModifiers()))
+ mh = mh.asFixedArity(); // remove varargs wrapper
+ return mh;
+ } catch (IllegalAccessException ex) {
+ throw new IllegalArgumentException(ex);
+ }
+ }
+ private static final Lookup DIRECT_INVOKER_LOOKUP;
+ private static final Class<?> MEMBER_NAME_CLASS;
+ private static final MethodHandle MH_INTERNAL_MEMBER_NAME;
+ private static final MethodHandle MH_DEBUG_STRING;
+ static {
+ try {
+ // This is white box testing. Use reflection to grab private implementation bits.
+ String magicName = "IMPL_LOOKUP";
+ Field magicLookup = MethodHandles.Lookup.class.getDeclaredField(magicName);
+ // This unit test will fail if a security manager is installed.
+ magicLookup.setAccessible(true);
+ // Forbidden fruit...
+ DIRECT_INVOKER_LOOKUP = (Lookup) magicLookup.get(null);
+ MEMBER_NAME_CLASS = Class.forName("java.lang.invoke.MemberName", false, MethodHandle.class.getClassLoader());
+ MH_INTERNAL_MEMBER_NAME = DIRECT_INVOKER_LOOKUP
+ .findVirtual(MethodHandle.class, "internalMemberName", methodType(MEMBER_NAME_CLASS))
+ .asType(methodType(Object.class, MethodHandle.class));
+ MH_DEBUG_STRING = DIRECT_INVOKER_LOOKUP
+ .findVirtual(MethodHandle.class, "debugString", methodType(String.class));
+ } catch (ReflectiveOperationException ex) {
+ throw new InternalError(ex);
+ }
+ }
+ private Object internalMemberName(MethodHandle mh) {
+ try {
+ return MH_INTERNAL_MEMBER_NAME.invokeExact(mh);
+ } catch (Throwable ex) {
+ throw new InternalError(ex);
+ }
+ }
+ private String debugString(MethodHandle mh) {
+ try {
+ return (String) MH_DEBUG_STRING.invokeExact(mh);
+ } catch (Throwable ex) {
+ throw new InternalError(ex);
+ }
+ }
+ private static MethodHandle directInvoker(int refKind, MethodType mtype) {
+ return directInvoker(REF_KIND_NAMES[refKind], mtype);
+ }
+ private static MethodHandle directInvoker(String name, MethodType mtype) {
+ boolean isStatic;
+ mtype = mtype.erase();
+ if (name.startsWith("MH::")) {
+ isStatic = false;
+ name = strip("MH::", name);
+ } else if (name.startsWith("REF_")) {
+ isStatic = true;
+ name = strip("REF_", name);
+ if (name.startsWith("invoke"))
+ name = "linkTo"+strip("invoke", name);
+ mtype = mtype.appendParameterTypes(MEMBER_NAME_CLASS);
+ } else {
+ throw new AssertionError("name="+name);
+ }
+ //System.out.println("directInvoker = "+name+mtype);
+ try {
+ if (isStatic)
+ return DIRECT_INVOKER_LOOKUP
+ .findStatic(MethodHandle.class, name, mtype);
+ else
+ return DIRECT_INVOKER_LOOKUP
+ .findVirtual(MethodHandle.class, name, mtype);
+ } catch (ReflectiveOperationException ex) {
+ throw new IllegalArgumentException(ex);
+ }
+ }
+ private Object invokeWithArguments(Method m, Object... args) {
+ Object recv = null;
+ if (!Modifier.isStatic(m.getModifiers())) {
+ recv = args[0];
+ args = pop(1, args);
+ }
+ try {
+ return m.invoke(recv, args);
+ } catch (IllegalAccessException|IllegalArgumentException|InvocationTargetException ex) {
+ throw new IllegalArgumentException(ex);
+ }
+ }
+ private Object invokeWithArguments(MethodHandle mh, Object... args) {
+ try {
+ return mh.invokeWithArguments(args);
+ } catch (Throwable ex) {
+ throw new IllegalArgumentException(ex);
+ }
+ }
+ private int counter;
+ private Object makeArgument(Class<?> type) {
+ final String cname = type.getSimpleName();
+ final int n = ++counter;
+ final int nn = (n << 10) + 13;
+ if (type.isAssignableFrom(String.class)) {
+ return "<"+cname+"#"+nn+">";
+ }
+ if (type == THIS_CLASS) return this.withCounter(nn);
+ if (type == Integer.class || type == int.class) return nn;
+ if (type == Character.class || type == char.class) return (char)(n % 100+' ');
+ if (type == Byte.class || type == byte.class) return (byte)-(n % 100);
+ if (type == Long.class || type == long.class) return (long)nn;
+ throw new IllegalArgumentException("don't know how to make argument of type: "+type);
+ }
+ private Object[] makeArguments(Class<?>... ptypes) {
+ Object[] args = new Object[ptypes.length];
+ for (int i = 0; i < args.length; i++)
+ args[i] = makeArgument(ptypes[i]);
+ return args;
+ }
+ private Object[] makeArguments(MethodType mtype) {
+ return makeArguments(mtype.parameterArray());
+ }
+ private Object[] pop(int n, Object[] args) {
+ if (n >= 0)
+ return Arrays.copyOfRange(args, n, args.length);
+ else
+ return Arrays.copyOfRange(args, 0, args.length+n);
+ }
+ private Object[] pushAtFront(Object arg1, Object[] args) {
+ Object[] res = new Object[1+args.length];
+ res[0] = arg1;
+ System.arraycopy(args, 0, res, 1, args.length);
+ return res;
+ }
+ private Object[] pushAtBack(Object[] args, Object argN) {
+ Object[] res = new Object[1+args.length];
+ System.arraycopy(args, 0, res, 0, args.length);
+ res[args.length] = argN;
+ return res;
+ }
+ private static String strip(String prefix, String s) {
+ assert(s.startsWith(prefix));
+ return s.substring(prefix.length());
+ }
+
+ private final int[] refKindTestCounts = new int[REF_KIND_NAMES.length];
+ @After
+ public void printCounts() {
+ ArrayList<String> zeroes = new ArrayList<>();
+ for (int i = 0; i < refKindTestCounts.length; i++) {
+ final int count = refKindTestCounts[i];
+ final String name = REF_KIND_NAMES[i];
+ if (count == 0) {
+ if (name != null) zeroes.add(name);
+ continue;
+ }
+ if (verbose >= 0)
+ System.out.println("test count for "+name+" : "+count);
+ else if (name != null)
+ zeroes.add(name);
+ }
+ if (verbose >= 0)
+ System.out.println("test counts zero for "+zeroes);
+ }
+
+ // Test subjects
+ public static String makeString(Object x) { return "makeString("+x+")"; }
+ public static String dupString(String x) { return "("+x+"+"+x+")"; }
+ public static String intString(int x) { return "intString("+x+")"; }
+ public static String byteString(byte x) { return "byteString("+x+")"; }
+ public static String longString(String x, long y, String z) { return "longString("+x+y+z+")"; }
+
+ public final String toString() {
+ return "<"+getClass().getSimpleName()+"#"+counter+">";
+ }
+ public final String hello() { return "hello from "+this; }
+ private PrivateInvokeTest withCounter(int counter) {
+ PrivateInvokeTest res = new PrivateInvokeTest();
+ res.counter = counter;
+ return res;
+ }
+
+ public static void main(String... av) throws Throwable {
+ new PrivateInvokeTest().run();
+ }
+ public void run() throws Throwable {
+ testFirst();
+ testInvokeDirect();
+ }
+
+ @Test
+ public void testFirst() throws Throwable {
+ if (true) return; // nothing here
+ try {
+ System.out.println("start of testFirst");
+ } finally {
+ System.out.println("end of testFirst");
+ }
+ }
+
+ @Test
+ public void testInvokeDirect() {
+ testInvokeDirect(getMethod(THIS_CLASS, "hello"));
+ testInvokeDirect(getMethod(Object.class, "toString"));
+ testInvokeDirect(getMethod(Comparable.class, "compareTo", Object.class));
+ testInvokeDirect(getMethod(THIS_CLASS, "makeString", Object.class));
+ testInvokeDirect(getMethod(THIS_CLASS, "dupString", String.class));
+ testInvokeDirect(getMethod(THIS_CLASS, "intString", int.class));
+ testInvokeDirect(getMethod(THIS_CLASS, "byteString", byte.class));
+ testInvokeDirect(getMethod(THIS_CLASS, "longString", String.class, long.class, String.class));
+ }
+
+ void testInvokeDirect(Method m) {
+ final int refKind = referenceKind(m);
+ testInvokeDirect(m, refKind);
+ testInvokeDirect(m, REF_MH_invokeBasic);
+ }
+ void testInvokeDirect(Method m, int refKind) {
+ if (verbose >= 1)
+ System.out.println("testInvoke m="+m+" : "+REF_KIND_NAMES[refKind]);
+ final MethodHandle mh = unreflect(m);
+ Object[] args = makeArguments(mh.type());
+ Object res1 = invokeWithArguments(m, args);
+ // res1 comes from java.lang.reflect.Method::invoke
+ if (verbose >= 1)
+ System.out.println("m"+Arrays.asList(args)+" => "+res1);
+ // res2 comes from java.lang.invoke.MethodHandle::invoke
+ Object res2 = invokeWithArguments(mh, args);
+ assertEquals(res1, res2);
+ MethodType mtype = mh.type();
+ testInvokeVia("DMH invoker", refKind, directInvoker(refKind, mtype), mh, res1, args);
+ MethodType etype = mtype.erase();
+ if (etype != mtype) {
+ // Try a detuned invoker.
+ testInvokeVia("erased DMH invoker", refKind, directInvoker(refKind, etype), mh, res1, args);
+ }
+ MethodType btype = basicType(mtype);
+ if (btype != mtype && btype != etype) {
+ // Try a detuned invoker.
+ testInvokeVia("basic DMH invoker", refKind, directInvoker(refKind, btype), mh, res1, args);
+ }
+ if (false) {
+ // this can crash the JVM
+ testInvokeVia("generic DMH invoker", refKind, directInvoker(refKind, mtype.generic()), mh, res1, args);
+ }
+ refKindTestCounts[refKind] += 1;
+ }
+
+ void testInvokeVia(String kind, int refKind, MethodHandle invoker, MethodHandle mh, Object res1, Object... args) {
+ Object[] args1;
+ if (refKind == REF_MH_invokeBasic)
+ args1 = pushAtFront(mh, args);
+ else
+ args1 = pushAtBack(args, internalMemberName(mh));
+ if (verbose >= 2) {
+ System.out.println(kind+" invoker="+invoker+" mh="+debugString(mh)+" args="+Arrays.asList(args1));
+ }
+ Object res3 = invokeWithArguments(invoker, args1);
+ assertEquals(res1, res3);
+ }
+}