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/*******************************************************************************
* Copyright (c) 2009, 2018 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:
* Fabian Mastenbroek - 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;
/**
* Filters branch in bytecode that Kotlin compiler generates for reading from
* <code>lateinit</code> properties.
*/
public class KotlinLateinitFilter implements IFilter {
private final static String OWNER = "kotlin/jvm/internal/Intrinsics";
private final static String NAME = "throwUninitializedPropertyAccessException";
public void filter(final MethodNode methodNode, final IFilterContext context,
final IFilterOutput output) {
for (AbstractInsnNode i = methodNode.instructions
.getFirst(); i != null; i = i.getNext()) {
if (i.getOpcode() != Opcodes.IFNONNULL) {
continue;
}
final AbstractInsnNode end = new Matcher(i).match();
if (end != null) {
output.ignore(i, end);
}
}
}
private static class Matcher extends AbstractMatcher {
private final AbstractInsnNode start;
private Matcher(final AbstractInsnNode start) {
this.start = start;
}
private AbstractInsnNode match() {
cursor = start;
nextIs(Opcodes.LDC);
nextIsInvokeStatic(OWNER, NAME);
return cursor;
}
}
}
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