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/*******************************************************************************
* Copyright (c) 2009, 2019 Mountainminds GmbH & Co. KG and Contributors
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Evgeny Mandrikov - initial API and implementation
*
*******************************************************************************/
package org.jacoco.core.test.validation.java8;
import static org.junit.Assert.assertEquals;
import java.lang.invoke.CallSite;
import java.lang.invoke.ConstantCallSite;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodType;
import java.lang.reflect.InvocationTargetException;
import org.jacoco.core.instr.Instrumenter;
import org.jacoco.core.runtime.IRuntime;
import org.jacoco.core.runtime.RuntimeData;
import org.jacoco.core.runtime.SystemPropertiesRuntime;
import org.jacoco.core.test.TargetLoader;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Handle;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
/**
* Test of ASM bug
* <a href="https://gitlab.ow2.org/asm/asm/issues/317748">#317748</a> that
* caused
* {@code java.lang.ClassFormatError: Short length on BootstrapMethods in class file}
* during instrumentation.
*/
public class BootstrapMethodReferenceTest {
private IRuntime runtime;
private Instrumenter instrumenter;
@Before
public void setup() throws Exception {
runtime = new SystemPropertiesRuntime();
instrumenter = new Instrumenter(runtime);
runtime.startup(new RuntimeData());
}
@After
public void teardown() {
runtime.shutdown();
}
@Test
public void test() throws Exception {
final String className = "Example";
final ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
cw.visit(Opcodes.V1_7, Opcodes.ACC_PUBLIC, className, null,
"java/lang/Object", null);
final MethodVisitor mv = cw.visitMethod(
Opcodes.ACC_PUBLIC | Opcodes.ACC_STATIC, "run", "()I", null,
null);
mv.visitCode();
addCauseOfResizeInstructions(mv);
final MethodType methodType = MethodType.methodType(CallSite.class,
MethodHandles.Lookup.class, String.class, MethodType.class);
final Handle handle = new Handle(Opcodes.H_INVOKESTATIC,
this.getClass().getCanonicalName().replace('.', '/'),
"bootstrap", methodType.toMethodDescriptorString(), false);
mv.visitInvokeDynamicInsn("invoke", "()I", handle);
mv.visitInsn(Opcodes.IRETURN);
mv.visitMaxs(1, 0);
mv.visitEnd();
cw.visitEnd();
final byte[] original = cw.toByteArray();
assertEquals(42, run(className, original));
final byte[] instrumented = instrumenter.instrument(original,
className);
assertEquals(42, run(className, instrumented));
}
private static int run(final String className, final byte[] bytes)
throws ClassNotFoundException, NoSuchMethodException,
InvocationTargetException, IllegalAccessException {
final Integer result = (Integer) new TargetLoader()
.add(className, bytes).getMethod("run").invoke(null);
return result.intValue();
}
/**
* Adds code that triggers usage of
* {@link org.objectweb.asm.MethodWriter#COMPUTE_INSERTED_FRAMES} during
* instrumentation.
*/
private static void addCauseOfResizeInstructions(final MethodVisitor mv) {
mv.visitInsn(Opcodes.ICONST_0);
mv.visitInsn(Opcodes.ICONST_1);
final Label target = new Label();
mv.visitJumpInsn(Opcodes.IFLE, target);
for (int i = 0; i < Short.MAX_VALUE; i++) {
mv.visitInsn(Opcodes.NOP);
}
mv.visitLabel(target);
}
public static CallSite bootstrap(final MethodHandles.Lookup caller,
final String name, final MethodType type) throws Exception {
return new ConstantCallSite(
caller.findStatic(BootstrapMethodReferenceTest.class,
"callTarget", MethodType.methodType(int.class)));
}
public static int callTarget() {
return 42;
}
}
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