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/*******************************************************************************
* Copyright (c) 2009, 2021 Mountainminds GmbH & Co. KG and Contributors
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Evgeny Mandrikov - initial API and implementation
*
*******************************************************************************/
package org.jacoco.core.internal.analysis.filter;
import org.objectweb.asm.Handle;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.tree.InvokeDynamicInsnNode;
import org.objectweb.asm.tree.MethodNode;
/**
* Filters methods <code>toString</code>, <code>hashCode</code> and
* <code>equals</code> that compiler generates for records.
*/
public final class RecordsFilter implements IFilter {
public void filter(final MethodNode methodNode,
final IFilterContext context, final IFilterOutput output) {
if (!"java/lang/Record".equals(context.getSuperClassName())) {
return;
}
final Matcher matcher = new Matcher();
if (matcher.isEquals(methodNode) || matcher.isHashCode(methodNode)
|| matcher.isToString(methodNode)) {
output.ignore(methodNode.instructions.getFirst(),
methodNode.instructions.getLast());
}
}
private static class Matcher extends AbstractMatcher {
boolean isToString(final MethodNode m) {
if (!"toString".equals(m.name)
|| !"()Ljava/lang/String;".equals(m.desc)) {
return false;
}
firstIsALoad0(m);
nextIsInvokeDynamic("toString");
nextIs(Opcodes.ARETURN);
return cursor != null;
}
boolean isHashCode(final MethodNode m) {
if (!"hashCode".equals(m.name) || !"()I".equals(m.desc)) {
return false;
}
firstIsALoad0(m);
nextIsInvokeDynamic("hashCode");
nextIs(Opcodes.IRETURN);
return cursor != null;
}
boolean isEquals(final MethodNode m) {
if (!"equals".equals(m.name)
|| !"(Ljava/lang/Object;)Z".equals(m.desc)) {
return false;
}
firstIsALoad0(m);
nextIs(Opcodes.ALOAD);
nextIsInvokeDynamic("equals");
nextIs(Opcodes.IRETURN);
return cursor != null;
}
private void nextIsInvokeDynamic(final String name) {
nextIs(Opcodes.INVOKEDYNAMIC);
if (cursor == null) {
return;
}
final InvokeDynamicInsnNode i = (InvokeDynamicInsnNode) cursor;
final Handle bsm = i.bsm;
if (name.equals(i.name)
&& "java/lang/runtime/ObjectMethods".equals(bsm.getOwner())
&& "bootstrap".equals(bsm.getName())) {
return;
}
cursor = null;
}
}
}
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