blob: f41ff2a94a5915277d7143330a3c0fcbfa017b26 (
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
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
|
/*
* Copyright (C) 2014 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.reflect.Method;
import java.nio.ByteBuffer;
public class Main {
public static void main(String[] args) throws Exception {
String name = System.getProperty("java.vm.name");
if (!"Dalvik".equals(name)) {
System.out.println("This test is not supported on " + name);
return;
}
testRecentAllocationTracking();
}
private static void testRecentAllocationTracking() throws Exception {
System.out.println("Confirm empty");
Allocations empty = new Allocations(DdmVmInternal.getRecentAllocations());
System.out.println("empty=" + empty);
System.out.println("Confirm enable");
System.out.println("status=" + DdmVmInternal.getRecentAllocationStatus());
DdmVmInternal.enableRecentAllocations(true);
System.out.println("status=" + DdmVmInternal.getRecentAllocationStatus());
System.out.println("Capture some allocations (note just this causes allocations)");
Allocations before = new Allocations(DdmVmInternal.getRecentAllocations());
System.out.println("before > 0=" + (before.numberOfEntries > 0));
System.out.println("Confirm when we overflow, we don't roll over to zero. b/17392248");
final int overflowAllocations = 64 * 1024; // Won't fit in unsigned 16-bit value.
for (int i = 0; i < overflowAllocations; i++) {
new Object();
}
Allocations after = new Allocations(DdmVmInternal.getRecentAllocations());
System.out.println("before < overflowAllocations=" + (before.numberOfEntries < overflowAllocations));
System.out.println("after > before=" + (after.numberOfEntries > before.numberOfEntries));
System.out.println("after.numberOfEntries=" + after.numberOfEntries);
System.out.println("Disable and confirm back to empty");
DdmVmInternal.enableRecentAllocations(false);
System.out.println("status=" + DdmVmInternal.getRecentAllocationStatus());
Allocations reset = new Allocations(DdmVmInternal.getRecentAllocations());
System.out.println("reset=" + reset);
System.out.println("Confirm we can disable twice in a row");
DdmVmInternal.enableRecentAllocations(false);
System.out.println("status=" + DdmVmInternal.getRecentAllocationStatus());
DdmVmInternal.enableRecentAllocations(false);
System.out.println("status=" + DdmVmInternal.getRecentAllocationStatus());
System.out.println("Confirm we can reenable twice in a row without losing allocations");
DdmVmInternal.enableRecentAllocations(true);
System.out.println("status=" + DdmVmInternal.getRecentAllocationStatus());
for (int i = 0; i < 16 * 1024; i++) {
new String("fnord");
}
Allocations first = new Allocations(DdmVmInternal.getRecentAllocations());
DdmVmInternal.enableRecentAllocations(true);
System.out.println("status=" + DdmVmInternal.getRecentAllocationStatus());
Allocations second = new Allocations(DdmVmInternal.getRecentAllocations());
System.out.println("second > first =" + (second.numberOfEntries > first.numberOfEntries));
System.out.println("Goodbye");
DdmVmInternal.enableRecentAllocations(false);
Allocations goodbye = new Allocations(DdmVmInternal.getRecentAllocations());
System.out.println("goodbye=" + goodbye);
}
private static class Allocations {
final int messageHeaderLen;
final int entryHeaderLen;
final int stackFrameLen;
final int numberOfEntries;
final int offsetToStringTableFromStartOfMessage;
final int numberOfClassNameStrings;
final int numberOfMethodNameStrings;
final int numberOfSourceFileNameStrings;
Allocations(byte[] allocations) {
ByteBuffer b = ByteBuffer.wrap(allocations);
messageHeaderLen = b.get() & 0xff;
if (messageHeaderLen != 15) {
throw new IllegalArgumentException("Unexpected messageHeaderLen " + messageHeaderLen);
}
entryHeaderLen = b.get() & 0xff;
if (entryHeaderLen != 9) {
throw new IllegalArgumentException("Unexpected entryHeaderLen " + entryHeaderLen);
}
stackFrameLen = b.get() & 0xff;
if (stackFrameLen != 8) {
throw new IllegalArgumentException("Unexpected messageHeaderLen " + stackFrameLen);
}
numberOfEntries = b.getShort() & 0xffff;
offsetToStringTableFromStartOfMessage = b.getInt();
numberOfClassNameStrings = b.getShort() & 0xffff;
numberOfMethodNameStrings = b.getShort() & 0xffff;
numberOfSourceFileNameStrings = b.getShort() & 0xffff;
}
public String toString() {
return ("Allocations[message header len: " + messageHeaderLen +
" entry header len: " + entryHeaderLen +
" stack frame len: " + stackFrameLen +
" number of entries: " + numberOfEntries +
" offset to string table from start of message: " + offsetToStringTableFromStartOfMessage +
" number of class name strings: " + numberOfClassNameStrings +
" number of method name strings: " + numberOfMethodNameStrings +
" number of source file name strings: " + numberOfSourceFileNameStrings +
"]");
}
}
private static class DdmVmInternal {
private static final Method enableRecentAllocationsMethod;
private static final Method getRecentAllocationStatusMethod;
private static final Method getRecentAllocationsMethod;
static {
try {
Class c = Class.forName("org.apache.harmony.dalvik.ddmc.DdmVmInternal");
enableRecentAllocationsMethod = c.getDeclaredMethod("enableRecentAllocations",
Boolean.TYPE);
getRecentAllocationStatusMethod = c.getDeclaredMethod("getRecentAllocationStatus");
getRecentAllocationsMethod = c.getDeclaredMethod("getRecentAllocations");
} catch (Exception e) {
throw new RuntimeException(e);
}
}
public static void enableRecentAllocations(boolean enable) throws Exception {
enableRecentAllocationsMethod.invoke(null, enable);
}
public static boolean getRecentAllocationStatus() throws Exception {
return (boolean) getRecentAllocationStatusMethod.invoke(null);
}
public static byte[] getRecentAllocations() throws Exception {
return (byte[]) getRecentAllocationsMethod.invoke(null);
}
}
}
|
