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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:
* 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.JumpInsnNode;
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 {
public void filter(final MethodNode methodNode,
final IFilterContext context, final IFilterOutput output) {
final Matcher matcher = new Matcher();
for (final AbstractInsnNode node : methodNode.instructions) {
matcher.match(node, output);
}
}
private static class Matcher extends AbstractMatcher {
public void match(final AbstractInsnNode start,
final IFilterOutput output) {
if (Opcodes.IFNONNULL != start.getOpcode()) {
return;
}
cursor = start;
nextIs(Opcodes.LDC);
nextIsInvoke(Opcodes.INVOKESTATIC, "kotlin/jvm/internal/Intrinsics",
"throwUninitializedPropertyAccessException",
"(Ljava/lang/String;)V");
if (cursor != null
&& skipNonOpcodes(cursor.getNext()) != skipNonOpcodes(
((JumpInsnNode) start).label)) {
nextIs(Opcodes.ACONST_NULL);
nextIs(Opcodes.ATHROW);
}
if (cursor != null) {
output.ignore(start, cursor);
}
}
}
}
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