144 lines
5.2 KiB
Java
144 lines
5.2 KiB
Java
/*
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* Copyright (c) 2014, 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.
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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 8051344
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* @summary Force OSR compilation with non-empty stack at the OSR entry point.
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* @modules java.base/jdk.internal.org.objectweb.asm
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* @run main/othervm -XX:CompileCommand=compileonly,TestCase::test
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* compiler.osr.TestOSRWithNonEmptyStack
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*/
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package compiler.osr;
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import jdk.internal.org.objectweb.asm.ClassWriter;
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import jdk.internal.org.objectweb.asm.Label;
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import jdk.internal.org.objectweb.asm.MethodVisitor;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.Method;
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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.ALOAD;
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import static jdk.internal.org.objectweb.asm.Opcodes.DUP;
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import static jdk.internal.org.objectweb.asm.Opcodes.IADD;
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import static jdk.internal.org.objectweb.asm.Opcodes.ICONST_0;
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import static jdk.internal.org.objectweb.asm.Opcodes.ICONST_1;
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import static jdk.internal.org.objectweb.asm.Opcodes.IF_ICMPLT;
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import static jdk.internal.org.objectweb.asm.Opcodes.ILOAD;
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import static jdk.internal.org.objectweb.asm.Opcodes.INVOKESPECIAL;
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import static jdk.internal.org.objectweb.asm.Opcodes.ISTORE;
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import static jdk.internal.org.objectweb.asm.Opcodes.POP;
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import static jdk.internal.org.objectweb.asm.Opcodes.RETURN;
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public class TestOSRWithNonEmptyStack extends ClassLoader {
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private static final int CLASS_FILE_VERSION = 52;
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private static final String CLASS_NAME = "TestCase";
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private static final String METHOD_NAME = "test";
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private static final int ITERATIONS = 1_000_000;
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private static byte[] generateTestClass() {
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ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
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cw.visit(TestOSRWithNonEmptyStack.CLASS_FILE_VERSION, ACC_PUBLIC,
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TestOSRWithNonEmptyStack.CLASS_NAME, null, "java/lang/Object",
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null);
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TestOSRWithNonEmptyStack.generateConstructor(cw);
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TestOSRWithNonEmptyStack.generateTestMethod(cw);
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cw.visitEnd();
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return cw.toByteArray();
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}
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private static void generateConstructor(ClassWriter classWriter) {
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MethodVisitor mv = classWriter.visitMethod(ACC_PUBLIC, "<init>", "()V",
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null, null);
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mv.visitCode();
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mv.visitVarInsn(ALOAD, 0);
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mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V",
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false);
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mv.visitInsn(RETURN);
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mv.visitMaxs(0, 0);
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mv.visitEnd();
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}
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private static void generateTestMethod(ClassWriter classWriter) {
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MethodVisitor mv = classWriter.visitMethod(ACC_PUBLIC,
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TestOSRWithNonEmptyStack.METHOD_NAME, "()V", null, null);
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Label osrEntryPoint = new Label();
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mv.visitCode();
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// Push 'this' into stack before OSR entry point to bail out compilation
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mv.visitVarInsn(ALOAD, 0);
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// Setup loop counter
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mv.visitInsn(ICONST_0);
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mv.visitVarInsn(ISTORE, 1);
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// Begin loop
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mv.visitLabel(osrEntryPoint);
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// Increment loop counter
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mv.visitVarInsn(ILOAD, 1);
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mv.visitInsn(ICONST_1);
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mv.visitInsn(IADD);
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// Duplicate it for loop condition check
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mv.visitInsn(DUP);
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mv.visitVarInsn(ISTORE, 1);
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// Check loop condition
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mv.visitLdcInsn(TestOSRWithNonEmptyStack.ITERATIONS);
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mv.visitJumpInsn(IF_ICMPLT, osrEntryPoint);
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// Pop 'this'.
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mv.visitInsn(POP);
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mv.visitInsn(RETURN);
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mv.visitMaxs(0, 0);
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mv.visitEnd();
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}
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private void run() {
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byte[] bytecode = TestOSRWithNonEmptyStack.generateTestClass();
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try {
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Class klass = defineClass(TestOSRWithNonEmptyStack.CLASS_NAME,
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bytecode, 0, bytecode.length);
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Constructor ctor = klass.getConstructor();
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Method method = klass.getDeclaredMethod(
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TestOSRWithNonEmptyStack.METHOD_NAME);
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Object testCase = ctor.newInstance();
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method.invoke(testCase);
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} catch (Exception e) {
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throw new RuntimeException(
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"Test bug: generated class should be valid.", e);
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}
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}
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public static void main(String args[]) {
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new TestOSRWithNonEmptyStack().run();
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}
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}
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