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
|
/* //device/libs/android_runtime/android_ddm_DdmHandleNativeHeap.cpp
**
** Copyright 2006, 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.
*/
#undef LOG_TAG
#define LOG_TAG "DdmHandleNativeHeap"
#include <JNIHelp.h>
#include <jni.h>
#include <android_runtime/AndroidRuntime.h>
#include <utils/Log.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#if defined(__arm__)
extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
size_t* infoSize, size_t* totalMemory, size_t* backtraceSize);
extern "C" void free_malloc_leak_info(uint8_t* info);
#endif
#define MAPS_FILE_SIZE 65 * 1024
struct Header {
size_t mapSize;
size_t allocSize;
size_t allocInfoSize;
size_t totalMemory;
size_t backtraceSize;
};
namespace android {
/*
* Retrieve the native heap information and the info from /proc/<self>/maps,
* copy them into a byte[] with a "struct Header" that holds data offsets,
* and return the array.
*/
static jbyteArray getLeakInfo(JNIEnv *env, jobject clazz)
{
#if defined(__arm__)
// get the info in /proc/[pid]/map
Header header;
memset(&header, 0, sizeof(header));
pid_t pid = getpid();
char path[FILENAME_MAX];
sprintf(path, "/proc/%d/maps", pid);
struct stat sb;
int ret = stat(path, &sb);
uint8_t* mapsFile = NULL;
if (ret == 0) {
mapsFile = (uint8_t*)malloc(MAPS_FILE_SIZE);
int fd = open(path, O_RDONLY);
if (mapsFile != NULL && fd != -1) {
int amount = 0;
do {
uint8_t* ptr = mapsFile + header.mapSize;
amount = read(fd, ptr, MAPS_FILE_SIZE);
if (amount <= 0) {
if (errno != EINTR)
break;
else
continue;
}
header.mapSize += amount;
} while (header.mapSize < MAPS_FILE_SIZE);
ALOGD("**** read %d bytes from '%s'", (int) header.mapSize, path);
}
}
uint8_t* allocBytes;
get_malloc_leak_info(&allocBytes, &header.allocSize, &header.allocInfoSize,
&header.totalMemory, &header.backtraceSize);
jbyte* bytes = NULL;
jbyte* ptr = NULL;
jbyteArray array = env->NewByteArray(sizeof(Header) + header.mapSize + header.allocSize);
if (array == NULL) {
goto done;
}
bytes = env->GetByteArrayElements(array, NULL);
ptr = bytes;
// ALOGD("*** mapSize: %d allocSize: %d allocInfoSize: %d totalMemory: %d",
// header.mapSize, header.allocSize, header.allocInfoSize, header.totalMemory);
memcpy(ptr, &header, sizeof(header));
ptr += sizeof(header);
if (header.mapSize > 0 && mapsFile != NULL) {
memcpy(ptr, mapsFile, header.mapSize);
ptr += header.mapSize;
}
memcpy(ptr, allocBytes, header.allocSize);
env->ReleaseByteArrayElements(array, bytes, 0);
done:
if (mapsFile != NULL) {
free(mapsFile);
}
// free the info up!
free_malloc_leak_info(allocBytes);
return array;
#else
return NULL;
#endif
}
static JNINativeMethod method_table[] = {
{ "getLeakInfo", "()[B", (void*)getLeakInfo },
};
int register_android_ddm_DdmHandleNativeHeap(JNIEnv *env)
{
return AndroidRuntime::registerNativeMethods(env, "android/ddm/DdmHandleNativeHeap", method_table, NELEM(method_table));
}
};
|
