90ac004ff6
Removed installing of unused class. Added error output to ClassFileInstaller. Reviewed-by: vlivanov, zmajo
156 lines
4.9 KiB
Java
156 lines
4.9 KiB
Java
/*
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* Copyright (c) 2016, 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 8072008
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* @library /testlibrary /test/lib
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* @compile -XDignore.symbol.file RedefineTest.java Agent.java
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* @run main ClassFileInstaller sun.hotspot.WhiteBox
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* sun.hotspot.WhiteBox$WhiteBoxPermission
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* java.lang.invoke.RedefineTest
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* Agent
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* @run main Agent agent.jar java.lang.invoke.RedefineTest
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* @run main/othervm -Xbootclasspath/a:. -javaagent:agent.jar
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* -XX:+IgnoreUnrecognizedVMOptions
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* -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
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* -Xbatch -XX:-TieredCompilation -XX:CICompilerCount=1
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* java.lang.invoke.RedefineTest
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*/
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package java.lang.invoke;
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import sun.hotspot.WhiteBox;
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import sun.misc.Unsafe;
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import jdk.internal.org.objectweb.asm.*;
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import jdk.internal.vm.annotation.DontInline;
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import java.lang.instrument.ClassDefinition;
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import java.lang.instrument.Instrumentation;
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import static jdk.internal.org.objectweb.asm.Opcodes.*;
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public class RedefineTest {
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static final MethodHandles.Lookup LOOKUP = MethodHandles.Lookup.IMPL_LOOKUP;
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static final Unsafe UNSAFE = Unsafe.getUnsafe();
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static final String NAME = "java/lang/invoke/RedefineTest$T";
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static Class<?> getClass(int r) {
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byte[] classFile = getClassFile(r);
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return UNSAFE.defineClass(NAME, classFile, 0, classFile.length, null, null);
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}
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/**
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* Generates a class of the following shape:
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* static class T {
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* @DontInline public static int f() { return $r; }
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* }
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*/
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static byte[] getClassFile(int r) {
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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, NAME, null, "java/lang/Object", null);
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{
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mv = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "f", "()I", null, null);
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mv.visitAnnotation("Ljdk/internal/vm/annotation/DontInline;", true);
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mv.visitCode();
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mv.visitLdcInsn(r);
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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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static final MethodHandle mh;
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static final Class<?> CLS = getClass(0);
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static {
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try {
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mh = LOOKUP.findStatic(CLS, "f", MethodType.methodType(int.class));
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} catch (Exception e) {
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throw new Error(e);
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}
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}
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static final WhiteBox WB = WhiteBox.getWhiteBox();
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@DontInline
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static int invokeBasic() {
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try {
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return (int)mh.invokeExact();
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} catch (Throwable e) {
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throw new Error(e);
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}
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}
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static Instrumentation instr;
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public static void premain(String args, Instrumentation instr) {
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RedefineTest.instr = instr;
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}
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public static void main(String[] args) throws Exception {
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for (int i = 0; i < 20_000; i++) {
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int r = invokeBasic();
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if (r != 0) {
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throw new Error(r + " != 0");
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}
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}
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// WB.ensureCompiled();
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redefine();
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int exp = (instr != null) ? 1 : 0;
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for (int i = 0; i < 20_000; i++) {
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if (invokeBasic() != exp) {
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throw new Error();
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}
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}
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WB.clearInlineCaches();
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for (int i = 0; i < 20_000; i++) {
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if (invokeBasic() != exp) {
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throw new Error();
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}
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}
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// WB.ensureCompiled();
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}
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static void redefine() {
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if (instr == null) {
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System.out.println("NOT REDEFINED");
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return;
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}
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ClassDefinition cd = new ClassDefinition(CLS, getClassFile(1));
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try {
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instr.redefineClasses(cd);
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} catch (Exception e) {
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throw new Error(e);
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}
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System.out.println("REDEFINED");
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}
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}
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