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
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
// Copyright (c) 2016, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
package com.android.tools.r8.graph;
import com.android.tools.r8.ApiLevelException;
import com.android.tools.r8.Resource.Origin;
import com.android.tools.r8.errors.InvalidDebugInfoException;
import com.android.tools.r8.ir.code.IRCode;
import com.android.tools.r8.ir.code.ValueNumberGenerator;
import com.android.tools.r8.ir.conversion.IRBuilder;
import com.android.tools.r8.ir.conversion.JarSourceCode;
import com.android.tools.r8.jar.JarRegisterEffectsVisitor;
import com.android.tools.r8.naming.ClassNameMapper;
import com.android.tools.r8.utils.InternalOptions;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.util.IdentityHashMap;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.commons.JSRInlinerAdapter;
import org.objectweb.asm.tree.MethodNode;
import org.objectweb.asm.util.Textifier;
import org.objectweb.asm.util.TraceMethodVisitor;
public class JarCode extends Code {
public static class ReparseContext {
// This will hold the content of the whole class. Once all the methods of the class are swapped
// from this to the actual JarCode, no other references would be left and the content can be
// GC'd.
public byte[] classCache;
public DexProgramClass owner;
private IdentityHashMap<DexMethod, JarCode> lookupMap = new IdentityHashMap<>();
}
private final DexType clazz;
private final Origin origin;
private MethodNode node;
private ReparseContext context;
private final JarApplicationReader application;
public JarCode(
DexMethod method, Origin origin, ReparseContext context, JarApplicationReader application) {
this.clazz = method.getHolder();
this.origin = origin;
this.context = context;
this.application = application;
context.lookupMap.put(method, this);
}
@Override
public boolean isJarCode() {
return true;
}
@Override
public JarCode asJarCode() {
return this;
}
@Override
protected int computeHashCode() {
triggerDelayedParsingIfNeccessary();
return node.hashCode();
}
@Override
protected boolean computeEquals(Object other) {
triggerDelayedParsingIfNeccessary();
if (this == other) {
return true;
}
if (other instanceof JarCode) {
JarCode o = (JarCode) other;
o.triggerDelayedParsingIfNeccessary();
// TODO(zerny): This amounts to object equality.
return node.equals(o.node);
}
return false;
}
@Override
public IRCode buildIR(DexEncodedMethod encodedMethod, InternalOptions options)
throws ApiLevelException {
triggerDelayedParsingIfNeccessary();
return options.debug
? internalBuildWithLocals(encodedMethod, null, options)
: internalBuild(encodedMethod, null, options);
}
public IRCode buildIR(
DexEncodedMethod encodedMethod, ValueNumberGenerator generator, InternalOptions options)
throws ApiLevelException {
assert generator != null;
triggerDelayedParsingIfNeccessary();
return options.debug
? internalBuildWithLocals(encodedMethod, generator, options)
: internalBuild(encodedMethod, generator, options);
}
private IRCode internalBuildWithLocals(
DexEncodedMethod encodedMethod, ValueNumberGenerator generator, InternalOptions options)
throws ApiLevelException {
try {
return internalBuild(encodedMethod, generator, options);
} catch (InvalidDebugInfoException e) {
options.warningInvalidDebugInfo(encodedMethod, origin, e);
node.localVariables.clear();
return internalBuild(encodedMethod, generator, options);
}
}
private IRCode internalBuild(
DexEncodedMethod encodedMethod, ValueNumberGenerator generator, InternalOptions options)
throws ApiLevelException {
if (!options.debug) {
node.localVariables.clear();
}
JarSourceCode source = new JarSourceCode(clazz, node, application);
IRBuilder builder =
(generator == null)
? new IRBuilder(encodedMethod, source, options)
: new IRBuilder(encodedMethod, source, generator, options);
return builder.build();
}
@Override
public void registerReachableDefinitions(UseRegistry registry) {
triggerDelayedParsingIfNeccessary();
node.instructions.accept(new JarRegisterEffectsVisitor(clazz, registry, application));
}
@Override
public String toString() {
triggerDelayedParsingIfNeccessary();
TraceMethodVisitor visitor = new TraceMethodVisitor(new Textifier());
node.accept(visitor);
StringWriter writer = new StringWriter();
visitor.p.print(new PrintWriter(writer));
return writer.toString();
}
@Override
public String toString(DexEncodedMethod method, ClassNameMapper naming) {
return toString();
}
private void triggerDelayedParsingIfNeccessary() {
if (context != null) {
// The SecondVistor is in charge of setting the context to null.
DexProgramClass owner = context.owner;
new ClassReader(context.classCache).accept(new SecondVisitor(context, application),
ClassReader.SKIP_FRAMES);
assert verifyNoReparseContext(owner);
}
}
/**
* Fills the MethodNodes of all the methods in the class and removes the ReparseContext.
*/
private static class SecondVisitor extends ClassVisitor {
private final ReparseContext context;
private final JarApplicationReader application;
public SecondVisitor(ReparseContext context, JarApplicationReader application) {
super(Opcodes.ASM6);
this.context = context;
this.application = application;
}
@Override
public MethodVisitor visitMethod(int access, String name, String desc, String signature,
String[] exceptions) {
MethodNode node = new JSRInlinerAdapter(null, access, name, desc, signature, exceptions);
JarCode code = context.lookupMap.get(application.getMethod(context.owner.type, name, desc));
if (code != null) {
code.context = null;
code.node = node;
return node;
}
return null;
}
}
private static boolean verifyNoReparseContext(DexProgramClass owner) {
for (DexEncodedMethod method : owner.virtualMethods()) {
Code code = method.getCode();
if (code != null && code.isJarCode()) {
if (code.asJarCode().context != null) {
return false;
}
}
}
for (DexEncodedMethod method : owner.directMethods()) {
Code code = method.getCode();
if (code != null && code.isJarCode()) {
if (code.asJarCode().context != null) {
return false;
}
}
}
return true;
}
}
|
