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
212
213
214
215
216
217
218
219
220
221
222
223
224
|
/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.lang.ref.PhantomReference;
import java.lang.ref.ReferenceQueue;
import java.lang.ref.SoftReference;
import java.lang.ref.WeakReference;
import libcore.util.NativeAllocationRegistry;
// We take a heap dump that includes a single instance of this
// DumpedStuff class. Objects stored as fields in this class can be easily
// found in the hprof dump by searching for the instance of the DumpedStuff
// class and reading the desired field.
public class DumpedStuff extends SuperDumpedStuff {
private void allocateObjectAtKnownSite() {
objectAllocatedAtKnownSite = new Object();
allocateObjectAtKnownSubSite();
allocateObjectAtObfSuperSite();
allocateObjectAtUnObfSuperSite();
allocateObjectAtOverriddenSite();
}
private void allocateObjectAtKnownSubSite() {
objectAllocatedAtKnownSubSite = new Object();
}
public void allocateObjectAtOverriddenSite() {
objectAllocatedAtOverriddenSite = new Object();
}
DumpedStuff(boolean baseline) {
allocateObjectAtKnownSite();
int n = baseline ? 400000 : 1000000;
bigArray = new byte[n];
for (int i = 0; i < n; i++) {
bigArray[i] = (byte)((i * i) & 0xFF);
}
// 0x12345, 50000, and 0xABCDABCD are arbitrary values.
NativeAllocationRegistry registry = new NativeAllocationRegistry(
Main.class.getClassLoader(), 0x12345, 50000);
registry.registerNativeAllocation(anObject, 0xABCDABCD);
{
Object object = new Object();
aLongStrongPathToSamplePathObject = new Reference(new Reference(new Reference(object)));
aShortWeakPathToSamplePathObject = new WeakReference(new Reference(object));
}
addedObject = baseline ? null : new AddedObject();
removedObject = baseline ? new RemovedObject() : null;
modifiedObject = new ModifiedObject();
modifiedObject.value = baseline ? 5 : 8;
modifiedObject.modifiedRefField = baseline ? "A1" : "A2";
modifiedObject.unmodifiedRefField = "B";
modifiedStaticField = baseline ? "C1" : "C2";
modifiedArray = baseline ? new int[]{0, 1, 2, 3} : new int[]{3, 1, 2, 0};
// Deep matching dominator trees shouldn't smash the stack when we try
// to diff them. Make some deep dominator trees to help test it.
for (int i = 0; i < 10000; i++) {
StackSmasher smasher = new StackSmasher();
smasher.child = stackSmasher;
stackSmasher = smasher;
if (!baseline) {
smasher = new StackSmasher();
smasher.child = stackSmasherAdded;
stackSmasherAdded = smasher;
}
}
gcPathArray[2].right.left = gcPathArray[2].left.right;
}
public static class ObjectTree {
public ObjectTree left;
public ObjectTree right;
public ObjectTree(ObjectTree left, ObjectTree right) {
this.left = left;
this.right = right;
}
}
public static class AddedObject {
}
public static class RemovedObject {
}
public static class UnchangedObject {
}
public static class ModifiedObject {
public int value;
public String modifiedRefField;
public String unmodifiedRefField;
}
public static class StackSmasher {
public StackSmasher child;
}
public static class Reference {
public Object referent;
public Reference(Object referent) {
this.referent = referent;
}
}
public interface IDumpedManager {
public static class Stub extends android.os.Binder implements IDumpedManager {
private static final java.lang.String DESCRIPTOR = "DumpedStuff$IDumpedManager";
public Stub() {
super(DESCRIPTOR);
}
public static class Proxy implements IDumpedManager {
android.os.IBinder mRemote;
Proxy(android.os.IBinder binderProxy) {
mRemote = binderProxy;
}
}
}
}
public interface IBinderInterfaceImpostor {
public static class Stub {
public static class Proxy implements IBinderInterfaceImpostor {
android.os.IBinder mFakeRemote = new android.os.BinderProxy();
Proxy(android.os.IBinder binderProxy) {
mFakeRemote = binderProxy;
}
}
}
}
private static class BinderProxyCarrier {
android.os.IBinder mRemote;
BinderProxyCarrier(android.os.IBinder binderProxy) {
mRemote = binderProxy;
}
}
private static class BinderService extends IDumpedManager.Stub {
// Intentionally empty
};
private static class FakeBinderService extends IBinderInterfaceImpostor.Stub {
// Intentionally empty
};
public String basicString = "hello, world";
public String nonAscii = "Sigma (Ʃ) is not ASCII";
public String embeddedZero = "embedded\0..."; // Non-ASCII for string compression purposes.
public char[] charArray = "char thing".toCharArray();
public String nullString = null;
public Object anObject = new Object();
public Reference aReference = new Reference(anObject);
public ReferenceQueue<Object> referenceQueue = new ReferenceQueue<Object>();
public PhantomReference aPhantomReference = new PhantomReference(anObject, referenceQueue);
public WeakReference aWeakReference = new WeakReference(anObject, referenceQueue);
public WeakReference aNullReferentReference = new WeakReference(null, referenceQueue);
public SoftReference aSoftReference = new SoftReference(new Object());
public Reference reachabilityReferenceChain;
public byte[] bigArray;
public ObjectTree[] gcPathArray = new ObjectTree[]{null, null,
new ObjectTree(
new ObjectTree(null, new ObjectTree(null, null)),
new ObjectTree(null, null)),
null};
public Reference aLongStrongPathToSamplePathObject;
public WeakReference aShortWeakPathToSamplePathObject;
public WeakReference aWeakRefToGcRoot = new WeakReference(Main.class);
public SoftReference aSoftChain = new SoftReference(new Reference(new Reference(new Object())));
public Object[] basicStringRef;
public AddedObject addedObject;
public UnchangedObject unchangedObject = new UnchangedObject();
public RemovedObject removedObject;
public ModifiedObject modifiedObject;
public StackSmasher stackSmasher;
public StackSmasher stackSmasherAdded;
public static String modifiedStaticField;
public int[] modifiedArray;
public Object objectAllocatedAtKnownSite;
public Object objectAllocatedAtKnownSubSite;
public android.os.IBinder correctBinderProxy = new android.os.BinderProxy();
public android.os.IBinder imposedBinderProxy = new android.os.BinderProxy();
public android.os.IBinder carriedBinderProxy = new android.os.BinderProxy();
Object correctBinderProxyObject = new IDumpedManager.Stub.Proxy(correctBinderProxy);
Object impostorBinderProxyObject = new IBinderInterfaceImpostor.Stub.Proxy(imposedBinderProxy);
Object carrierBinderProxyObject = new BinderProxyCarrier(carriedBinderProxy);
Object binderService = new BinderService();
Object fakeBinderService = new FakeBinderService();
Object binderToken = new android.os.Binder();
Object namedBinderToken = new android.os.Binder("awesomeToken");
// Allocate those objects that we need to not be GC'd before taking the heap
// dump.
public void shouldNotGc() {
reachabilityReferenceChain = new Reference(
new SoftReference(
new Reference(
new WeakReference(
new SoftReference(
new PhantomReference(new Object(), referenceQueue))))));
}
}
|
