author | prr |
Thu, 26 Jul 2018 10:00:40 -0700 | |
changeset 51251 | 0a7a0a6dfa22 |
parent 50405 | 449cbde4c40c |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2015, 2018, 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. |
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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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/** |
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* @test |
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* @bug 8057967 |
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* @requires vm.opt.final.ClassUnloading |
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* @modules java.base/jdk.internal.misc |
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* java.base/jdk.internal.org.objectweb.asm |
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* @library patches / |
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* |
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* @build java.base/java.lang.invoke.MethodHandleHelper |
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* @run main/bootclasspath/othervm -Xbatch -XX:+IgnoreUnrecognizedVMOptions -Xlog:class+unload |
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* -XX:+PrintCompilation -XX:+TraceDependencies -XX:+TraceReferenceGC |
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* -verbose:gc |
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* compiler.jsr292.CallSiteDepContextTest |
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*/ |
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package compiler.jsr292; |
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import jdk.internal.misc.Unsafe; |
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import jdk.internal.org.objectweb.asm.ClassWriter; |
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import jdk.internal.org.objectweb.asm.Handle; |
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import jdk.internal.org.objectweb.asm.MethodVisitor; |
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import java.lang.invoke.CallSite; |
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import java.lang.invoke.MethodHandle; |
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import java.lang.invoke.MethodHandleHelper; |
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import java.lang.invoke.MethodHandles; |
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import java.lang.invoke.MethodType; |
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import java.lang.invoke.MutableCallSite; |
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import java.lang.ref.PhantomReference; |
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import java.lang.ref.Reference; |
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import java.lang.ref.ReferenceQueue; |
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import java.lang.reflect.Field; |
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import static jdk.internal.org.objectweb.asm.Opcodes.ACC_PUBLIC; |
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import static jdk.internal.org.objectweb.asm.Opcodes.ACC_STATIC; |
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import static jdk.internal.org.objectweb.asm.Opcodes.ACC_SUPER; |
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import static jdk.internal.org.objectweb.asm.Opcodes.H_INVOKESTATIC; |
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import static jdk.internal.org.objectweb.asm.Opcodes.IRETURN; |
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public class CallSiteDepContextTest { |
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static final Unsafe UNSAFE = Unsafe.getUnsafe(); |
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static final MethodHandles.Lookup LOOKUP = MethodHandleHelper.IMPL_LOOKUP; |
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static final String CLASS_NAME = "compiler/jsr292/Test"; |
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static final String METHOD_NAME = "m"; |
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static final MethodType TYPE = MethodType.methodType(int.class); |
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static MutableCallSite mcs; |
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static MethodHandle bsmMH; |
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static { |
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try { |
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bsmMH = LOOKUP.findStatic( |
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CallSiteDepContextTest.class, "bootstrap", |
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MethodType.methodType(CallSite.class, MethodHandles.Lookup.class, String.class, MethodType.class)); |
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} catch(Throwable e) { |
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throw new InternalError(e); |
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} |
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} |
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public static CallSite bootstrap(MethodHandles.Lookup caller, |
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String invokedName, |
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MethodType invokedType) { |
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return mcs; |
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} |
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static class T { |
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static int f1() { return 1; } |
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static int f2() { return 2; } |
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} |
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static byte[] getClassFile(String suffix) { |
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ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES | ClassWriter.COMPUTE_MAXS); |
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MethodVisitor mv; |
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cw.visit(52, ACC_PUBLIC | ACC_SUPER, CLASS_NAME + suffix, null, "java/lang/Object", null); |
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{ |
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mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, METHOD_NAME, TYPE.toMethodDescriptorString(), null, null); |
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mv.visitCode(); |
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Handle bsm = new Handle(H_INVOKESTATIC, |
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CallSiteDepContextTest.class.getName().replace(".", "/"), |
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"bootstrap", |
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bsmMH.type().toMethodDescriptorString()); |
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mv.visitInvokeDynamicInsn("methodName", TYPE.toMethodDescriptorString(), bsm); |
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mv.visitInsn(IRETURN); |
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mv.visitMaxs(0, 0); |
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mv.visitEnd(); |
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} |
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cw.visitEnd(); |
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return cw.toByteArray(); |
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} |
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private static void execute(int expected, MethodHandle... mhs) throws Throwable { |
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for (int i = 0; i < 20_000; i++) { |
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for (MethodHandle mh : mhs) { |
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int r = (int) mh.invokeExact(); |
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if (r != expected) { |
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throw new Error(r + " != " + expected); |
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} |
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} |
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} |
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} |
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public static void testHiddenDepField() { |
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try { |
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Field f = MethodHandleHelper.MHN_CALL_SITE_CONTEXT_CLASS.getDeclaredField("vmdependencies"); |
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throw new AssertionError("Context.dependencies field should be hidden"); |
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} catch(NoSuchFieldException e) { /* expected */ } |
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} |
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public static void testSharedCallSite() throws Throwable { |
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Class<?> cls1 = UNSAFE.defineAnonymousClass(CallSiteDepContextTest.class, getClassFile("CS_1"), null); |
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Class<?> cls2 = UNSAFE.defineAnonymousClass(CallSiteDepContextTest.class, getClassFile("CS_2"), null); |
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MethodHandle[] mhs = new MethodHandle[] { |
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LOOKUP.findStatic(cls1, METHOD_NAME, TYPE), |
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LOOKUP.findStatic(cls2, METHOD_NAME, TYPE) |
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}; |
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mcs = new MutableCallSite(LOOKUP.findStatic(T.class, "f1", TYPE)); |
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execute(1, mhs); |
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mcs.setTarget(LOOKUP.findStatic(T.class, "f2", TYPE)); |
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execute(2, mhs); |
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} |
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public static void testNonBoundCallSite() throws Throwable { |
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mcs = new MutableCallSite(LOOKUP.findStatic(T.class, "f1", TYPE)); |
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// mcs.context == null |
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MethodHandle mh = mcs.dynamicInvoker(); |
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execute(1, mh); |
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// mcs.context == cls1 |
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Class<?> cls1 = UNSAFE.defineAnonymousClass(CallSiteDepContextTest.class, getClassFile("NonBound_1"), null); |
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MethodHandle mh1 = LOOKUP.findStatic(cls1, METHOD_NAME, TYPE); |
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execute(1, mh1); |
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159 |
|
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mcs.setTarget(LOOKUP.findStatic(T.class, "f2", TYPE)); |
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|
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execute(2, mh, mh1); |
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} |
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164 |
|
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static ReferenceQueue rq = new ReferenceQueue(); |
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static PhantomReference ref; |
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167 |
|
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public static void testGC(boolean clear, boolean precompile) throws Throwable { |
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String id = "_" + clear + "_" + precompile; |
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170 |
|
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mcs = new MutableCallSite(LOOKUP.findStatic(T.class, "f1", TYPE)); |
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172 |
|
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Class<?>[] cls = new Class[] { |
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UNSAFE.defineAnonymousClass(CallSiteDepContextTest.class, getClassFile("GC_1" + id), null), |
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UNSAFE.defineAnonymousClass(CallSiteDepContextTest.class, getClassFile("GC_2" + id), null), |
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}; |
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177 |
|
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MethodHandle[] mhs = new MethodHandle[] { |
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LOOKUP.findStatic(cls[0], METHOD_NAME, TYPE), |
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LOOKUP.findStatic(cls[1], METHOD_NAME, TYPE), |
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181 |
}; |
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182 |
|
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// mcs.context == cls[0] |
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int r = (int) mhs[0].invokeExact(); |
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185 |
|
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186 |
execute(1, mhs); |
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187 |
|
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ref = new PhantomReference<>(cls[0], rq); |
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cls[0] = UNSAFE.defineAnonymousClass(CallSiteDepContextTest.class, getClassFile("GC_3" + id), null); |
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mhs[0] = LOOKUP.findStatic(cls[0], METHOD_NAME, TYPE); |
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191 |
|
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192 |
do { |
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193 |
System.gc(); |
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194 |
try { |
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195 |
Reference ref1 = rq.remove(100); |
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196 |
if (ref1 == ref) { |
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197 |
break; |
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|
198 |
} |
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199 |
} catch(InterruptedException e) { /* ignore */ } |
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200 |
} while (true); |
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|
201 |
|
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202 |
if (clear) { |
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203 |
ref.clear(); |
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204 |
System.gc(); // Ensure that the stale context is unloaded |
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|
205 |
} |
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206 |
if (precompile) { |
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207 |
execute(1, mhs); |
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|
208 |
} |
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mcs.setTarget(LOOKUP.findStatic(T.class, "f2", TYPE)); |
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|
210 |
execute(2, mhs); |
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|
211 |
} |
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|
212 |
|
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213 |
public static void main(String[] args) throws Throwable { |
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214 |
testHiddenDepField(); |
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215 |
testSharedCallSite(); |
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216 |
testNonBoundCallSite(); |
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217 |
testGC(false, false); |
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218 |
testGC(false, true); |
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219 |
testGC( true, false); |
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220 |
testGC( true, true); |
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221 |
System.out.println("TEST PASSED"); |
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|
222 |
} |
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223 |
} |