1/*
2 * Copyright 2013, Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32package org.jf.dexlib2.builder;
33
34import com.google.common.collect.Lists;
35import junit.framework.Assert;
36import org.jf.dexlib2.Opcode;
37import org.jf.dexlib2.builder.instruction.BuilderInstruction10t;
38import org.jf.dexlib2.builder.instruction.BuilderInstruction10x;
39import org.jf.dexlib2.iface.ExceptionHandler;
40import org.jf.dexlib2.iface.MethodImplementation;
41import org.jf.dexlib2.iface.TryBlock;
42import org.jf.dexlib2.iface.debug.DebugItem;
43import org.jf.dexlib2.iface.debug.LineNumber;
44import org.jf.dexlib2.iface.instruction.Instruction;
45import org.jf.dexlib2.iface.instruction.OffsetInstruction;
46import org.junit.Test;
47
48import java.util.List;
49
50public class FixOffsetsTest {
51    @Test
52    public void testFixOffsets() {
53        MethodImplementationBuilder builder = new MethodImplementationBuilder(1);
54
55        Label firstGotoTarget = builder.getLabel("firstGotoTarget");
56        builder.addInstruction(new BuilderInstruction10t(Opcode.GOTO, firstGotoTarget));
57
58        builder.addLineNumber(1);
59
60        for (int i=0; i<250; i++) {
61            builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
62        }
63
64        builder.addLabel("tryStart");
65
66        builder.addLineNumber(2);
67
68        for (int i=0; i<250; i++) {
69            builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
70        }
71
72        builder.addLineNumber(3);
73
74        Label secondGotoTarget = builder.getLabel("secondGotoTarget");
75        builder.addInstruction(new BuilderInstruction10t(Opcode.GOTO, secondGotoTarget));
76
77
78        builder.addLineNumber(4);
79        builder.addLabel("handler");
80
81        for (int i=0; i<500; i++) {
82            builder.addInstruction(new BuilderInstruction10x(Opcode.NOP));
83        }
84
85        builder.addLineNumber(5);
86
87        builder.addLabel("tryEnd");
88
89        builder.addLabel("firstGotoTarget");
90        builder.addLabel("secondGotoTarget");
91        builder.addInstruction(new BuilderInstruction10x(Opcode.RETURN_VOID));
92
93        Label tryStart = builder.getLabel("tryStart");
94        Label tryEnd = builder.getLabel("tryEnd");
95        Label handler = builder.getLabel("handler");
96
97        builder.addCatch(tryStart, tryEnd, handler);
98
99        MethodImplementation impl = builder.getMethodImplementation();
100
101        List<? extends Instruction> instructions = Lists.newArrayList(impl.getInstructions());
102        Assert.assertEquals(1003, instructions.size());
103
104        Assert.assertEquals(Opcode.GOTO_16, instructions.get(0).getOpcode());
105        Assert.assertEquals(1004, ((OffsetInstruction)instructions.get(0)).getCodeOffset());
106
107        Assert.assertEquals(Opcode.GOTO_16, instructions.get(501).getOpcode());
108        Assert.assertEquals(502, ((OffsetInstruction)instructions.get(501)).getCodeOffset());
109
110        List<? extends TryBlock<? extends ExceptionHandler>> exceptionHandlers = impl.getTryBlocks();
111
112        Assert.assertEquals(1, exceptionHandlers.size());
113        Assert.assertEquals(252, exceptionHandlers.get(0).getStartCodeAddress());
114        Assert.assertEquals(752, exceptionHandlers.get(0).getCodeUnitCount());
115
116        Assert.assertEquals(1, exceptionHandlers.get(0).getExceptionHandlers().size());
117
118        ExceptionHandler exceptionHandler = exceptionHandlers.get(0).getExceptionHandlers().get(0);
119        Assert.assertEquals(504, exceptionHandler.getHandlerCodeAddress());
120
121        List<DebugItem> debugItems = Lists.newArrayList(impl.getDebugItems());
122
123        Assert.assertEquals(5, debugItems.size());
124
125        Assert.assertEquals(1, ((LineNumber)debugItems.get(0)).getLineNumber());
126        Assert.assertEquals(2, debugItems.get(0).getCodeAddress());
127
128        Assert.assertEquals(2, ((LineNumber)debugItems.get(1)).getLineNumber());
129        Assert.assertEquals(252, debugItems.get(1).getCodeAddress());
130
131        Assert.assertEquals(3, ((LineNumber)debugItems.get(2)).getLineNumber());
132        Assert.assertEquals(502, debugItems.get(2).getCodeAddress());
133
134        Assert.assertEquals(4, ((LineNumber)debugItems.get(3)).getLineNumber());
135        Assert.assertEquals(504, debugItems.get(3).getCodeAddress());
136
137        Assert.assertEquals(5, ((LineNumber)debugItems.get(4)).getLineNumber());
138        Assert.assertEquals(1004, debugItems.get(4).getCodeAddress());
139    }
140}
141