| /******************************************************************************* |
| * Copyright (c) 2009, 2017 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.internal.analysis.filter; |
| |
| import org.objectweb.asm.Opcodes; |
| import org.objectweb.asm.tree.AbstractInsnNode; |
| import org.objectweb.asm.tree.MethodNode; |
| import org.objectweb.asm.tree.TryCatchBlockNode; |
| |
| /** |
| * Filters code that is generated for synchronized statement. |
| */ |
| public final class SynchronizedFilter implements IFilter { |
| |
| public void filter(MethodNode methodNode, IFilterOutput output) { |
| for (TryCatchBlockNode tryCatch : methodNode.tryCatchBlocks) { |
| if (tryCatch.type != null) { |
| continue; |
| } |
| if (tryCatch.start == tryCatch.handler) { |
| continue; |
| } |
| final AbstractInsnNode to = new Matcher(tryCatch.handler).match(); |
| if (to == null) { |
| continue; |
| } |
| output.ignore(tryCatch.handler, to); |
| } |
| } |
| |
| private static class Matcher { |
| private final AbstractInsnNode start; |
| private AbstractInsnNode cursor; |
| |
| private Matcher(final AbstractInsnNode start) { |
| this.start = start; |
| } |
| |
| private AbstractInsnNode match() { |
| if (nextIsEcj() || nextIsJavac()) { |
| return cursor; |
| } |
| return null; |
| } |
| |
| private boolean nextIsJavac() { |
| cursor = start; |
| return nextIs(Opcodes.ASTORE) && nextIs(Opcodes.ALOAD) |
| && nextIs(Opcodes.MONITOREXIT) && nextIs(Opcodes.ALOAD) |
| && nextIs(Opcodes.ATHROW); |
| } |
| |
| private boolean nextIsEcj() { |
| cursor = start; |
| return nextIs(Opcodes.ALOAD) && nextIs(Opcodes.MONITOREXIT) |
| && nextIs(Opcodes.ATHROW); |
| } |
| |
| /** |
| * Moves {@link #cursor} to next instruction and returns |
| * <code>true</code> if it has given opcode. |
| */ |
| private boolean nextIs(int opcode) { |
| next(); |
| return cursor != null && cursor.getOpcode() == opcode; |
| } |
| |
| /** |
| * Moves {@link #cursor} to next instruction. |
| */ |
| private void next() { |
| do { |
| cursor = cursor.getNext(); |
| } while (cursor != null |
| && (cursor.getType() == AbstractInsnNode.FRAME |
| || cursor.getType() == AbstractInsnNode.LABEL |
| || cursor.getType() == AbstractInsnNode.LINE)); |
| } |
| } |
| |
| } |