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/*******************************************************************************
* Copyright (c) 2009, 2012 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:
* Marc R. Hoffmann - initial API and implementation
*
*******************************************************************************/
package org.jacoco.core.internal.flow;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodAdapter;
import org.objectweb.asm.Opcodes;
/**
* Adapter that creates additional visitor events for probes to be inserted into
* a method.
*/
public final class MethodProbesAdapter extends MethodAdapter {
private final IMethodProbesVisitor probesVisitor;
private final IProbeIdGenerator idGenerator;
/**
* Create a new adapter instance.
*
* @param probesVisitor
* visitor to delegate to
* @param idGenerator
* generator for unique probe ids
*/
public MethodProbesAdapter(final IMethodProbesVisitor probesVisitor,
final IProbeIdGenerator idGenerator) {
super(probesVisitor);
this.probesVisitor = probesVisitor;
this.idGenerator = idGenerator;
}
@Override
public void visitLabel(final Label label) {
if (LabelInfo.isMultiTarget(label) && LabelInfo.isSuccessor(label)) {
probesVisitor.visitProbe(idGenerator.nextId());
}
probesVisitor.visitLabel(label);
}
@Override
public void visitInsn(final int opcode) {
switch (opcode) {
case Opcodes.IRETURN:
case Opcodes.LRETURN:
case Opcodes.FRETURN:
case Opcodes.DRETURN:
case Opcodes.ARETURN:
case Opcodes.RETURN:
case Opcodes.ATHROW:
probesVisitor.visitInsnWithProbe(opcode, idGenerator.nextId());
break;
default:
probesVisitor.visitInsn(opcode);
break;
}
}
@Override
public void visitJumpInsn(final int opcode, final Label label) {
if (LabelInfo.isMultiTarget(label)) {
probesVisitor.visitJumpInsnWithProbe(opcode, label,
idGenerator.nextId());
} else {
probesVisitor.visitJumpInsn(opcode, label);
}
}
@Override
public void visitLookupSwitchInsn(final Label dflt, final int[] keys,
final Label[] labels) {
if (markLabels(dflt, labels)) {
probesVisitor.visitLookupSwitchInsnWithProbes(dflt, keys, labels);
} else {
probesVisitor.visitLookupSwitchInsn(dflt, keys, labels);
}
}
@Override
public void visitTableSwitchInsn(final int min, final int max,
final Label dflt, final Label[] labels) {
if (markLabels(dflt, labels)) {
probesVisitor
.visitTableSwitchInsnWithProbes(min, max, dflt, labels);
} else {
probesVisitor.visitTableSwitchInsn(min, max, dflt, labels);
}
}
private boolean markLabels(final Label dflt, final Label[] labels) {
boolean probe = false;
LabelInfo.resetDone(labels);
if (LabelInfo.isMultiTarget(dflt)) {
LabelInfo.setProbeId(dflt, idGenerator.nextId());
probe = true;
}
LabelInfo.setDone(dflt);
for (final Label l : labels) {
if (!LabelInfo.isDone(l) && LabelInfo.isMultiTarget(l)) {
LabelInfo.setProbeId(l, idGenerator.nextId());
probe = true;
}
LabelInfo.setDone(l);
}
return probe;
}
}
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