blob: 65e763d51a6073d60a8ca468032f1e1d1fda55da (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/*******************************************************************************
* 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));
}
}
}
|
