125 lines
4.6 KiB
Java
125 lines
4.6 KiB
Java
/*
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* Copyright (c) 2023, 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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*
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* @bug 8228604
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*
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* @requires vm.jvmti
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* @modules java.base/jdk.internal.org.objectweb.asm
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* @library /test/lib
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*
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* @run main/othervm/native -agentlib:MissedStackMapFrames MissedStackMapFrames
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*/
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import jdk.internal.org.objectweb.asm.ClassReader;
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import jdk.internal.org.objectweb.asm.ClassVisitor;
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import jdk.internal.org.objectweb.asm.MethodVisitor;
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import jdk.internal.org.objectweb.asm.Opcodes;
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public class MissedStackMapFrames {
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static {
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System.loadLibrary("MissedStackMapFrames");
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}
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/* For each test class:
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* - loads class (JNIEnv::FindClass);
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* - retransforms class (jvmtiEnv::RetransformClasses).
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* Saves class bytes passed to ClassFileLoadHook.
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*/
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private static native boolean doTest();
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/* methods to analyze doTest results */
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private static native int testCount();
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private static native Class testClass(int idx);
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private static native byte[] loadBytes(int idx);
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private static native byte[] retransformBytes(int idx);
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private static int getStackMapFrameCount(byte[] classfileBuffer) {
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ClassReader reader = new ClassReader(classfileBuffer);
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final int[] frameCount = {0};
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ClassVisitor cv = new ClassVisitor(Opcodes.ASM9) {
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@Override
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public MethodVisitor visitMethod(int access, String name,
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String descriptor, String signature,
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String[] exceptions) {
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return new MethodVisitor(Opcodes.ASM9) {
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private int methodFrames = 0;
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@Override
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public void visitFrame(int type, int numLocal, Object[] local,
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int numStack, Object[] stack) {
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methodFrames++;
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}
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@Override
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public void visitEnd() {
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log(" method " + name + " - " + methodFrames + " frames");
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frameCount[0] += methodFrames;
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}
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};
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}
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};
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reader.accept(cv, 0);
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return frameCount[0];
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}
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private static int checkStackMapFrames(String mode, byte[] classfileBuffer) {
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log(mode + ", len = " + classfileBuffer.length);
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int frameCount = getStackMapFrameCount(classfileBuffer);
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log(" Has stack map frames: " + frameCount);
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if (frameCount == 0) {
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throw new RuntimeException(mode + " - no stack frames");
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}
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return frameCount;
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}
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private static void checkStackMapFrames(String mode, byte[] classfileBuffer, int expectedCount) {
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int actualCount = checkStackMapFrames(mode, classfileBuffer);
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if (actualCount != expectedCount) {
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throw new RuntimeException(mode + " - unexpected stack frames count: " + actualCount
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+ " (expected " + expectedCount + ")");
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}
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}
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public static void main(String[] args) throws Exception {
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if (!doTest()) {
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throw new RuntimeException("Test failed");
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}
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// verify results
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for (int i = 0; i < testCount(); i++) {
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Class cls = testClass(i);
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byte[] loadBytes = loadBytes(i);
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byte[] retransformBytes = retransformBytes(i);
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int loadCount = checkStackMapFrames(cls + "(load)", loadBytes);
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checkStackMapFrames(cls + "(retransform)", retransformBytes, loadCount);
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}
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}
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private static void log(Object msg) {
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System.out.println(msg);
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}
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}
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