author | psandoz |
Thu, 24 Mar 2016 11:21:21 +0100 | |
changeset 36934 | 590fc47a0aeb |
parent 36435 | 0408881ad616 |
child 37343 | 35a2231828a7 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008, 2015, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package java.lang.invoke; |
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import jdk.internal.ref.CleanerFactory; |
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import sun.invoke.util.Wrapper; |
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import java.lang.invoke.MethodHandles.Lookup; |
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import java.lang.reflect.Field; |
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import static java.lang.invoke.MethodHandleNatives.Constants.*; |
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import static java.lang.invoke.MethodHandleStatics.TRACE_METHOD_LINKAGE; |
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import static java.lang.invoke.MethodHandles.Lookup.IMPL_LOOKUP; |
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/** |
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* The JVM interface for the method handles package is all here. |
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* This is an interface internal and private to an implementation of JSR 292. |
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* <em>This class is not part of the JSR 292 standard.</em> |
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* @author jrose |
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*/ |
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class MethodHandleNatives { |
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private MethodHandleNatives() { } // static only |
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/// MemberName support |
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static native void init(MemberName self, Object ref); |
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static native void expand(MemberName self); |
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static native MemberName resolve(MemberName self, Class<?> caller) throws LinkageError; |
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static native int getMembers(Class<?> defc, String matchName, String matchSig, |
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int matchFlags, Class<?> caller, int skip, MemberName[] results); |
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/// Field layout queries parallel to jdk.internal.misc.Unsafe: |
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static native long objectFieldOffset(MemberName self); // e.g., returns vmindex |
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static native long staticFieldOffset(MemberName self); // e.g., returns vmindex |
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static native Object staticFieldBase(MemberName self); // e.g., returns clazz |
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static native Object getMemberVMInfo(MemberName self); // returns {vmindex,vmtarget} |
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/// CallSite support |
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/** Tell the JVM that we need to change the target of a CallSite. */ |
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static native void setCallSiteTargetNormal(CallSite site, MethodHandle target); |
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static native void setCallSiteTargetVolatile(CallSite site, MethodHandle target); |
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/** Represents a context to track nmethod dependencies on CallSite instance target. */ |
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static class CallSiteContext implements Runnable { |
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//@Injected JVM_nmethodBucket* vmdependencies; |
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static CallSiteContext make(CallSite cs) { |
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final CallSiteContext newContext = new CallSiteContext(); |
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// CallSite instance is tracked by a Cleanable which clears native |
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// structures allocated for CallSite context. Though the CallSite can |
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// become unreachable, its Context is retained by the Cleanable instance |
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// (which is referenced from Cleaner instance which is referenced from |
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// CleanerFactory class) until cleanup is performed. |
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CleanerFactory.cleaner().register(cs, newContext); |
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return newContext; |
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} |
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@Override |
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public void run() { |
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MethodHandleNatives.clearCallSiteContext(this); |
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} |
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} |
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/** Invalidate all recorded nmethods. */ |
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private static native void clearCallSiteContext(CallSiteContext context); |
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private static native void registerNatives(); |
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static { |
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registerNatives(); |
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} |
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/** |
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* Compile-time constants go here. This collection exists not only for |
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* reference from clients, but also for ensuring the VM and JDK agree on the |
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* values of these constants (see {@link #verifyConstants()}). |
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*/ |
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static class Constants { |
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Constants() { } // static only |
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static final int |
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MN_IS_METHOD = 0x00010000, // method (not constructor) |
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MN_IS_CONSTRUCTOR = 0x00020000, // constructor |
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MN_IS_FIELD = 0x00040000, // field |
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MN_IS_TYPE = 0x00080000, // nested type |
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MN_CALLER_SENSITIVE = 0x00100000, // @CallerSensitive annotation detected |
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MN_REFERENCE_KIND_SHIFT = 24, // refKind |
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MN_REFERENCE_KIND_MASK = 0x0F000000 >> MN_REFERENCE_KIND_SHIFT, |
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// The SEARCH_* bits are not for MN.flags but for the matchFlags argument of MHN.getMembers: |
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MN_SEARCH_SUPERCLASSES = 0x00100000, |
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MN_SEARCH_INTERFACES = 0x00200000; |
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/** |
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* Constant pool reference-kind codes, as used by CONSTANT_MethodHandle CP entries. |
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*/ |
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static final byte |
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REF_NONE = 0, // null value |
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REF_getField = 1, |
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REF_getStatic = 2, |
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REF_putField = 3, |
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REF_putStatic = 4, |
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REF_invokeVirtual = 5, |
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REF_invokeStatic = 6, |
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REF_invokeSpecial = 7, |
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REF_newInvokeSpecial = 8, |
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REF_invokeInterface = 9, |
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REF_LIMIT = 10; |
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} |
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static boolean refKindIsValid(int refKind) { |
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return (refKind > REF_NONE && refKind < REF_LIMIT); |
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} |
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static boolean refKindIsField(byte refKind) { |
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assert(refKindIsValid(refKind)); |
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return (refKind <= REF_putStatic); |
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} |
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static boolean refKindIsGetter(byte refKind) { |
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assert(refKindIsValid(refKind)); |
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return (refKind <= REF_getStatic); |
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} |
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static boolean refKindIsSetter(byte refKind) { |
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return refKindIsField(refKind) && !refKindIsGetter(refKind); |
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} |
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static boolean refKindIsMethod(byte refKind) { |
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return !refKindIsField(refKind) && (refKind != REF_newInvokeSpecial); |
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} |
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static boolean refKindIsConstructor(byte refKind) { |
152 |
return (refKind == REF_newInvokeSpecial); |
|
153 |
} |
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static boolean refKindHasReceiver(byte refKind) { |
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assert(refKindIsValid(refKind)); |
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return (refKind & 1) != 0; |
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} |
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static boolean refKindIsStatic(byte refKind) { |
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return !refKindHasReceiver(refKind) && (refKind != REF_newInvokeSpecial); |
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} |
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static boolean refKindDoesDispatch(byte refKind) { |
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assert(refKindIsValid(refKind)); |
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return (refKind == REF_invokeVirtual || |
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refKind == REF_invokeInterface); |
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} |
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static { |
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final int HR_MASK = ((1 << REF_getField) | |
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(1 << REF_putField) | |
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(1 << REF_invokeVirtual) | |
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(1 << REF_invokeSpecial) | |
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(1 << REF_invokeInterface) |
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); |
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for (byte refKind = REF_NONE+1; refKind < REF_LIMIT; refKind++) { |
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assert(refKindHasReceiver(refKind) == (((1<<refKind) & HR_MASK) != 0)) : refKind; |
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} |
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} |
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static String refKindName(byte refKind) { |
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assert(refKindIsValid(refKind)); |
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switch (refKind) { |
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case REF_getField: return "getField"; |
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case REF_getStatic: return "getStatic"; |
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case REF_putField: return "putField"; |
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case REF_putStatic: return "putStatic"; |
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case REF_invokeVirtual: return "invokeVirtual"; |
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case REF_invokeStatic: return "invokeStatic"; |
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case REF_invokeSpecial: return "invokeSpecial"; |
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case REF_newInvokeSpecial: return "newInvokeSpecial"; |
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case REF_invokeInterface: return "invokeInterface"; |
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default: return "REF_???"; |
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} |
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} |
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192 |
|
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private static native int getNamedCon(int which, Object[] name); |
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194 |
static boolean verifyConstants() { |
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Object[] box = { null }; |
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for (int i = 0; ; i++) { |
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box[0] = null; |
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int vmval = getNamedCon(i, box); |
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199 |
if (box[0] == null) break; |
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200 |
String name = (String) box[0]; |
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201 |
try { |
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202 |
Field con = Constants.class.getDeclaredField(name); |
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203 |
int jval = con.getInt(null); |
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if (jval == vmval) continue; |
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String err = (name+": JVM has "+vmval+" while Java has "+jval); |
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206 |
if (name.equals("CONV_OP_LIMIT")) { |
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207 |
System.err.println("warning: "+err); |
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208 |
continue; |
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209 |
} |
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210 |
throw new InternalError(err); |
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211 |
} catch (NoSuchFieldException | IllegalAccessException ex) { |
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212 |
String err = (name+": JVM has "+vmval+" which Java does not define"); |
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213 |
// ignore exotic ops the JVM cares about; we just wont issue them |
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214 |
//System.err.println("warning: "+err); |
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215 |
continue; |
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216 |
} |
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217 |
} |
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218 |
return true; |
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|
219 |
} |
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220 |
static { |
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221 |
assert(verifyConstants()); |
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222 |
} |
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223 |
|
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224 |
// Up-calls from the JVM. |
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225 |
// These must NOT be public. |
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226 |
|
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227 |
/** |
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228 |
* The JVM is linking an invokedynamic instruction. Create a reified call site for it. |
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229 |
*/ |
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230 |
static MemberName linkCallSite(Object callerObj, |
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231 |
Object bootstrapMethodObj, |
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|
232 |
Object nameObj, Object typeObj, |
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|
233 |
Object staticArguments, |
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|
234 |
Object[] appendixResult) { |
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|
235 |
MethodHandle bootstrapMethod = (MethodHandle)bootstrapMethodObj; |
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|
236 |
Class<?> caller = (Class<?>)callerObj; |
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237 |
String name = nameObj.toString().intern(); |
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238 |
MethodType type = (MethodType)typeObj; |
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239 |
if (!TRACE_METHOD_LINKAGE) |
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240 |
return linkCallSiteImpl(caller, bootstrapMethod, name, type, |
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241 |
staticArguments, appendixResult); |
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242 |
return linkCallSiteTracing(caller, bootstrapMethod, name, type, |
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243 |
staticArguments, appendixResult); |
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244 |
} |
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245 |
static MemberName linkCallSiteImpl(Class<?> caller, |
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246 |
MethodHandle bootstrapMethod, |
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247 |
String name, MethodType type, |
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248 |
Object staticArguments, |
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249 |
Object[] appendixResult) { |
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250 |
CallSite callSite = CallSite.makeSite(bootstrapMethod, |
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251 |
name, |
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252 |
type, |
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|
253 |
staticArguments, |
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254 |
caller); |
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255 |
if (callSite instanceof ConstantCallSite) { |
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256 |
appendixResult[0] = callSite.dynamicInvoker(); |
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|
257 |
return Invokers.linkToTargetMethod(type); |
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|
258 |
} else { |
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259 |
appendixResult[0] = callSite; |
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260 |
return Invokers.linkToCallSiteMethod(type); |
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261 |
} |
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262 |
} |
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263 |
// Tracing logic: |
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264 |
static MemberName linkCallSiteTracing(Class<?> caller, |
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265 |
MethodHandle bootstrapMethod, |
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266 |
String name, MethodType type, |
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267 |
Object staticArguments, |
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268 |
Object[] appendixResult) { |
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|
269 |
Object bsmReference = bootstrapMethod.internalMemberName(); |
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diff
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|
270 |
if (bsmReference == null) bsmReference = bootstrapMethod; |
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diff
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|
271 |
Object staticArglist = (staticArguments instanceof Object[] ? |
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diff
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|
272 |
java.util.Arrays.asList((Object[]) staticArguments) : |
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diff
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|
273 |
staticArguments); |
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diff
changeset
|
274 |
System.out.println("linkCallSite "+caller.getName()+" "+ |
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diff
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|
275 |
bsmReference+" "+ |
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diff
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|
276 |
name+type+"/"+staticArglist); |
5c9e5961d21c
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diff
changeset
|
277 |
try { |
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diff
changeset
|
278 |
MemberName res = linkCallSiteImpl(caller, bootstrapMethod, name, type, |
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diff
changeset
|
279 |
staticArguments, appendixResult); |
5c9e5961d21c
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diff
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|
280 |
System.out.println("linkCallSite => "+res+" + "+appendixResult[0]); |
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diff
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|
281 |
return res; |
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diff
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|
282 |
} catch (Throwable ex) { |
5c9e5961d21c
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diff
changeset
|
283 |
System.out.println("linkCallSite => throw "+ex); |
5c9e5961d21c
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diff
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|
284 |
throw ex; |
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diff
changeset
|
285 |
} |
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changeset
|
286 |
} |
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diff
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|
287 |
|
4ada807383c8
6939134: JSR 292 adjustments to method handle invocation
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diff
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|
288 |
/** |
4ada807383c8
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diff
changeset
|
289 |
* The JVM wants a pointer to a MethodType. Oblige it by finding or creating one. |
4ada807383c8
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diff
changeset
|
290 |
*/ |
4ada807383c8
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diff
changeset
|
291 |
static MethodType findMethodHandleType(Class<?> rtype, Class<?>[] ptypes) { |
8821
2836ee97ee27
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|
292 |
return MethodType.makeImpl(rtype, ptypes, true); |
5722
4ada807383c8
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|
293 |
} |
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|
294 |
|
5726 | 295 |
/** |
13423
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|
296 |
* The JVM wants to link a call site that requires a dynamic type check. |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
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changeset
|
297 |
* Name is a type-checking invoker, invokeExact or invoke. |
17843fff200d
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|
298 |
* Return a JVM method (MemberName) to handle the invoking. |
17843fff200d
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|
299 |
* The method assumes the following arguments on the stack: |
17843fff200d
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diff
changeset
|
300 |
* 0: the method handle being invoked |
17843fff200d
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changeset
|
301 |
* 1-N: the arguments to the method handle invocation |
19804 | 302 |
* N+1: an optional, implicitly added argument (typically the given MethodType) |
303 |
* <p> |
|
304 |
* The nominal method at such a call site is an instance of |
|
305 |
* a signature-polymorphic method (see @PolymorphicSignature). |
|
306 |
* Such method instances are user-visible entities which are |
|
307 |
* "split" from the generic placeholder method in {@code MethodHandle}. |
|
308 |
* (Note that the placeholder method is not identical with any of |
|
309 |
* its instances. If invoked reflectively, is guaranteed to throw an |
|
310 |
* {@code UnsupportedOperationException}.) |
|
311 |
* If the signature-polymorphic method instance is ever reified, |
|
312 |
* it appears as a "copy" of the original placeholder |
|
313 |
* (a native final member of {@code MethodHandle}) except |
|
314 |
* that its type descriptor has shape required by the instance, |
|
315 |
* and the method instance is <em>not</em> varargs. |
|
316 |
* The method instance is also marked synthetic, since the |
|
317 |
* method (by definition) does not appear in Java source code. |
|
318 |
* <p> |
|
319 |
* The JVM is allowed to reify this method as instance metadata. |
|
320 |
* For example, {@code invokeBasic} is always reified. |
|
321 |
* But the JVM may instead call {@code linkMethod}. |
|
322 |
* If the result is an * ordered pair of a {@code (method, appendix)}, |
|
323 |
* the method gets all the arguments (0..N inclusive) |
|
324 |
* plus the appendix (N+1), and uses the appendix to complete the call. |
|
325 |
* In this way, one reusable method (called a "linker method") |
|
326 |
* can perform the function of any number of polymorphic instance |
|
327 |
* methods. |
|
328 |
* <p> |
|
329 |
* Linker methods are allowed to be weakly typed, with any or |
|
330 |
* all references rewritten to {@code Object} and any primitives |
|
331 |
* (except {@code long}/{@code float}/{@code double}) |
|
332 |
* rewritten to {@code int}. |
|
333 |
* A linker method is trusted to return a strongly typed result, |
|
334 |
* according to the specific method type descriptor of the |
|
335 |
* signature-polymorphic instance it is emulating. |
|
336 |
* This can involve (as necessary) a dynamic check using |
|
337 |
* data extracted from the appendix argument. |
|
338 |
* <p> |
|
339 |
* The JVM does not inspect the appendix, other than to pass |
|
340 |
* it verbatim to the linker method at every call. |
|
341 |
* This means that the JDK runtime has wide latitude |
|
342 |
* for choosing the shape of each linker method and its |
|
343 |
* corresponding appendix. |
|
344 |
* Linker methods should be generated from {@code LambdaForm}s |
|
345 |
* so that they do not become visible on stack traces. |
|
346 |
* <p> |
|
347 |
* The {@code linkMethod} call is free to omit the appendix |
|
348 |
* (returning null) and instead emulate the required function |
|
349 |
* completely in the linker method. |
|
350 |
* As a corner case, if N==255, no appendix is possible. |
|
351 |
* In this case, the method returned must be custom-generated to |
|
352 |
* to perform any needed type checking. |
|
353 |
* <p> |
|
354 |
* If the JVM does not reify a method at a call site, but instead |
|
355 |
* calls {@code linkMethod}, the corresponding call represented |
|
356 |
* in the bytecodes may mention a valid method which is not |
|
357 |
* representable with a {@code MemberName}. |
|
358 |
* Therefore, use cases for {@code linkMethod} tend to correspond to |
|
359 |
* special cases in reflective code such as {@code findVirtual} |
|
360 |
* or {@code revealDirect}. |
|
8821
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diff
changeset
|
361 |
*/ |
13423
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7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
362 |
static MemberName linkMethod(Class<?> callerClass, int refKind, |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
363 |
Class<?> defc, String name, Object type, |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
364 |
Object[] appendixResult) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
365 |
if (!TRACE_METHOD_LINKAGE) |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
366 |
return linkMethodImpl(callerClass, refKind, defc, name, type, appendixResult); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
367 |
return linkMethodTracing(callerClass, refKind, defc, name, type, appendixResult); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
368 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
369 |
static MemberName linkMethodImpl(Class<?> callerClass, int refKind, |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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diff
changeset
|
370 |
Class<?> defc, String name, Object type, |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
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11006
diff
changeset
|
371 |
Object[] appendixResult) { |
13610
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
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13423
diff
changeset
|
372 |
try { |
36934 | 373 |
if (refKind == REF_invokeVirtual) { |
374 |
if (defc == MethodHandle.class) { |
|
375 |
return Invokers.methodHandleInvokeLinkerMethod( |
|
376 |
name, fixMethodType(callerClass, type), appendixResult); |
|
377 |
} else if (defc == VarHandle.class) { |
|
378 |
return varHandleOperationLinkerMethod( |
|
379 |
name, fixMethodType(callerClass, type), appendixResult); |
|
380 |
} |
|
13610
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
381 |
} |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
382 |
} catch (Throwable ex) { |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
383 |
if (ex instanceof LinkageError) |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
384 |
throw (LinkageError) ex; |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
385 |
else |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
386 |
throw new LinkageError(ex.getMessage(), ex); |
9646
5ebbe5ab084f
6939861: JVM should handle more conversion operations
jrose
parents:
9645
diff
changeset
|
387 |
} |
13610
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
388 |
throw new LinkageError("no such method "+defc.getName()+"."+name+type); |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
389 |
} |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
390 |
private static MethodType fixMethodType(Class<?> callerClass, Object type) { |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
391 |
if (type instanceof MethodType) |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
392 |
return (MethodType) type; |
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
393 |
else |
32986
ea54ac8672e7
8136893: Improve early java.lang.invoke infrastructure initialization
plevart
parents:
32649
diff
changeset
|
394 |
return MethodType.fromDescriptor((String)type, callerClass.getClassLoader()); |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
395 |
} |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
396 |
// Tracing logic: |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
397 |
static MemberName linkMethodTracing(Class<?> callerClass, int refKind, |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
398 |
Class<?> defc, String name, Object type, |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
399 |
Object[] appendixResult) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
400 |
System.out.println("linkMethod "+defc.getName()+"."+ |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
401 |
name+type+"/"+Integer.toHexString(refKind)); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
402 |
try { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
403 |
MemberName res = linkMethodImpl(callerClass, refKind, defc, name, type, appendixResult); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
404 |
System.out.println("linkMethod => "+res+" + "+appendixResult[0]); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
405 |
return res; |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
406 |
} catch (Throwable ex) { |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
407 |
System.out.println("linkMethod => throw "+ex); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
408 |
throw ex; |
7554
8a0ad9757002
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents:
7052
diff
changeset
|
409 |
} |
8a0ad9757002
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents:
7052
diff
changeset
|
410 |
} |
8a0ad9757002
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents:
7052
diff
changeset
|
411 |
|
36934 | 412 |
/** |
413 |
* Obtain the method to link to the VarHandle operation. |
|
414 |
* This method is located here and not in Invokers to avoid |
|
415 |
* intializing that and other classes early on in VM bootup. |
|
416 |
*/ |
|
417 |
private static MemberName varHandleOperationLinkerMethod(String name, |
|
418 |
MethodType mtype, |
|
419 |
Object[] appendixResult) { |
|
420 |
// Get the signature method type |
|
421 |
MethodType sigType = mtype.basicType(); |
|
422 |
||
423 |
// Get the access kind from the method name |
|
424 |
VarHandle.AccessMode ak; |
|
425 |
try { |
|
426 |
ak = VarHandle.AccessMode.valueOf(name); |
|
427 |
} catch (IllegalArgumentException e) { |
|
428 |
throw MethodHandleStatics.newInternalError(e); |
|
429 |
} |
|
430 |
||
431 |
// If not polymorphic in the return type, such as the compareAndSet |
|
432 |
// methods that return boolean |
|
433 |
if (ak.isPolyMorphicInReturnType) { |
|
434 |
if (ak.returnType != mtype.returnType()) { |
|
435 |
// The caller contains a different return type than that |
|
436 |
// defined by the method |
|
437 |
throw newNoSuchMethodErrorOnVarHandle(name, mtype); |
|
438 |
} |
|
439 |
// Adjust the return type of the signature method type |
|
440 |
sigType = sigType.changeReturnType(ak.returnType); |
|
441 |
} |
|
442 |
||
443 |
// Get the guard method type for linking |
|
444 |
MethodType guardType = sigType |
|
445 |
// VarHandle at start |
|
446 |
.insertParameterTypes(0, VarHandle.class) |
|
447 |
// Access descriptor at end |
|
448 |
.appendParameterTypes(VarHandle.AccessDescriptor.class); |
|
449 |
||
450 |
// Create the appendix descriptor constant |
|
451 |
VarHandle.AccessDescriptor ad = new VarHandle.AccessDescriptor(mtype, ak.at.ordinal(), ak.ordinal()); |
|
452 |
appendixResult[0] = ad; |
|
453 |
||
454 |
if (MethodHandleStatics.VAR_HANDLE_GUARDS) { |
|
455 |
MemberName linker = new MemberName( |
|
456 |
VarHandleGuards.class, "guard_" + getVarHandleMethodSignature(sigType), |
|
457 |
guardType, REF_invokeStatic); |
|
458 |
try { |
|
459 |
return MemberName.getFactory().resolveOrFail( |
|
460 |
REF_invokeStatic, linker, VarHandleGuards.class, ReflectiveOperationException.class); |
|
461 |
} catch (ReflectiveOperationException ex) { |
|
462 |
// Fall back to lambda form linkage if guard method is not available |
|
463 |
// TODO Optionally log fallback ? |
|
464 |
} |
|
465 |
} |
|
466 |
return Invokers.varHandleInvokeLinkerMethod(name, mtype); |
|
467 |
} |
|
468 |
static String getVarHandleMethodSignature(MethodType mt) { |
|
469 |
StringBuilder sb = new StringBuilder(mt.parameterCount() + 1); |
|
470 |
||
471 |
for (int i = 0; i < mt.parameterCount(); i++) { |
|
472 |
Class<?> pt = mt.parameterType(i); |
|
473 |
sb.append(getCharType(pt)); |
|
474 |
} |
|
475 |
||
476 |
sb.append('_').append(getCharType(mt.returnType())); |
|
477 |
||
478 |
return sb.toString(); |
|
479 |
} |
|
480 |
static char getCharType(Class<?> pt) { |
|
481 |
return Wrapper.forBasicType(pt).basicTypeChar(); |
|
482 |
} |
|
483 |
static NoSuchMethodError newNoSuchMethodErrorOnVarHandle(String name, MethodType mtype) { |
|
484 |
return new NoSuchMethodError("VarHandle." + name + mtype); |
|
485 |
} |
|
13610
28122b96858e
7191102: nightly failures after JSR 292 lazy method handle update (round 3)
jrose
parents:
13423
diff
changeset
|
486 |
|
7554
8a0ad9757002
6939224: MethodHandle.invokeGeneric needs to perform the correct set of conversions
jrose
parents:
7052
diff
changeset
|
487 |
/** |
5726 | 488 |
* The JVM is resolving a CONSTANT_MethodHandle CP entry. And it wants our help. |
489 |
* It will make an up-call to this method. (Do not change the name or signature.) |
|
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
490 |
* The type argument is a Class for field requests and a MethodType for non-fields. |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
491 |
* <p> |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
492 |
* Recent versions of the JVM may also pass a resolved MemberName for the type. |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
493 |
* In that case, the name is ignored and may be null. |
5726 | 494 |
*/ |
495 |
static MethodHandle linkMethodHandleConstant(Class<?> callerClass, int refKind, |
|
496 |
Class<?> defc, String name, Object type) { |
|
7052
963a5baf2ba3
6980096: JSR 292 reflective lookup should throw checked exceptions
jrose
parents:
5727
diff
changeset
|
497 |
try { |
963a5baf2ba3
6980096: JSR 292 reflective lookup should throw checked exceptions
jrose
parents:
5727
diff
changeset
|
498 |
Lookup lookup = IMPL_LOOKUP.in(callerClass); |
13423
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
499 |
assert(refKindIsValid(refKind)); |
17843fff200d
7023639: JSR 292 method handle invocation needs a fast path for compiled code
twisti
parents:
11006
diff
changeset
|
500 |
return lookup.linkMethodHandleConstant((byte) refKind, defc, name, type); |
20498
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
501 |
} catch (IllegalAccessException ex) { |
21326 | 502 |
Throwable cause = ex.getCause(); |
503 |
if (cause instanceof AbstractMethodError) { |
|
504 |
throw (AbstractMethodError) cause; |
|
505 |
} else { |
|
506 |
Error err = new IllegalAccessError(ex.getMessage()); |
|
507 |
throw initCauseFrom(err, ex); |
|
508 |
} |
|
20498
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
509 |
} catch (NoSuchMethodException ex) { |
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
510 |
Error err = new NoSuchMethodError(ex.getMessage()); |
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
511 |
throw initCauseFrom(err, ex); |
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
512 |
} catch (NoSuchFieldException ex) { |
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
513 |
Error err = new NoSuchFieldError(ex.getMessage()); |
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
514 |
throw initCauseFrom(err, ex); |
8347
e5daa5772ffd
7013730: JSR 292 reflective operations should report errors with standard exception types
jrose
parents:
7554
diff
changeset
|
515 |
} catch (ReflectiveOperationException ex) { |
7052
963a5baf2ba3
6980096: JSR 292 reflective lookup should throw checked exceptions
jrose
parents:
5727
diff
changeset
|
516 |
Error err = new IncompatibleClassChangeError(); |
20498
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
517 |
throw initCauseFrom(err, ex); |
5726 | 518 |
} |
519 |
} |
|
14222 | 520 |
|
521 |
/** |
|
20498
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
522 |
* Use best possible cause for err.initCause(), substituting the |
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
523 |
* cause for err itself if the cause has the same (or better) type. |
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
524 |
*/ |
32649
2ee9017c7597
8136583: Core libraries should use blessed modifier order
martin
parents:
31070
diff
changeset
|
525 |
private static Error initCauseFrom(Error err, Exception ex) { |
20498
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
526 |
Throwable th = ex.getCause(); |
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
527 |
if (err.getClass().isInstance(th)) |
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
528 |
return (Error) th; |
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
529 |
err.initCause(th == null ? ex : th); |
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
530 |
return err; |
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
531 |
} |
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
532 |
|
6b1da6741f95
8022701: Accessibility checking: InvocationTargetException is thrown instead of IllegalAccessError
drchase
parents:
19804
diff
changeset
|
533 |
/** |
14222 | 534 |
* Is this method a caller-sensitive method? |
25979 | 535 |
* I.e., does it call Reflection.getCallerClass or a similar method |
14222 | 536 |
* to ask about the identity of its caller? |
537 |
*/ |
|
538 |
static boolean isCallerSensitive(MemberName mem) { |
|
16118 | 539 |
if (!mem.isInvocable()) return false; // fields are not caller sensitive |
16906
44dfee24cb71
8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents:
16121
diff
changeset
|
540 |
|
44dfee24cb71
8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents:
16121
diff
changeset
|
541 |
return mem.isCallerSensitive() || canBeCalledVirtual(mem); |
44dfee24cb71
8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents:
16121
diff
changeset
|
542 |
} |
44dfee24cb71
8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents:
16121
diff
changeset
|
543 |
|
44dfee24cb71
8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents:
16121
diff
changeset
|
544 |
static boolean canBeCalledVirtual(MemberName mem) { |
44dfee24cb71
8010117: Annotate jdk caller sensitive methods with @sun.reflect.CallerSensitive
mchung
parents:
16121
diff
changeset
|
545 |
assert(mem.isInvocable()); |
14222 | 546 |
Class<?> defc = mem.getDeclaringClass(); |
547 |
switch (mem.getName()) { |
|
16118 | 548 |
case "checkMemberAccess": |
549 |
return canBeCalledVirtual(mem, java.lang.SecurityManager.class); |
|
14222 | 550 |
case "getContextClassLoader": |
16118 | 551 |
return canBeCalledVirtual(mem, java.lang.Thread.class); |
14222 | 552 |
} |
553 |
return false; |
|
554 |
} |
|
14679
e1fbc33baf51
8003851: MethodHandleNatives dependency on java.sql.DriverManager
mchung
parents:
14222
diff
changeset
|
555 |
|
16118 | 556 |
static boolean canBeCalledVirtual(MemberName symbolicRef, Class<?> definingClass) { |
557 |
Class<?> symbolicRefClass = symbolicRef.getDeclaringClass(); |
|
558 |
if (symbolicRefClass == definingClass) return true; |
|
559 |
if (symbolicRef.isStatic() || symbolicRef.isPrivate()) return false; |
|
560 |
return (definingClass.isAssignableFrom(symbolicRefClass) || // Msym overrides Mdef |
|
561 |
symbolicRefClass.isInterface()); // Mdef implements Msym |
|
562 |
} |
|
2707
5a17df307cbc
6829144: JSR 292 JVM features need a provisional Java API
jrose
parents:
diff
changeset
|
563 |
} |