1 /*
2 * Copyright 2011, The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17
18 //#define LOG_NDEBUG 0
19 #define LOG_TAG "MemoryLeackTrackUtil"
20 #include <utils/Log.h>
21
22 #include "media/MemoryLeakTrackUtil.h"
23 #include <sstream>
24
25 /*
26 * The code here originally resided in MediaPlayerService.cpp
27 */
28
29 // Figure out the abi based on defined macros.
30 #if defined(__arm__)
31 #define ABI_STRING "arm"
32 #elif defined(__aarch64__)
33 #define ABI_STRING "arm64"
34 #elif defined(__mips__) && !defined(__LP64__)
35 #define ABI_STRING "mips"
36 #elif defined(__mips__) && defined(__LP64__)
37 #define ABI_STRING "mips64"
38 #elif defined(__i386__)
39 #define ABI_STRING "x86"
40 #elif defined(__x86_64__)
41 #define ABI_STRING "x86_64"
42 #else
43 #error "Unsupported ABI"
44 #endif
45
46 extern std::string backtrace_string(const uintptr_t* frames, size_t frame_count);
47
48 namespace android {
49
50 extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize,
51 size_t* infoSize, size_t* totalMemory, size_t* backtraceSize);
52
53 extern "C" void free_malloc_leak_info(uint8_t* info);
54
dumpMemoryAddresses(size_t limit)55 std::string dumpMemoryAddresses(size_t limit)
56 {
57 uint8_t *info;
58 size_t overallSize;
59 size_t infoSize;
60 size_t totalMemory;
61 size_t backtraceSize;
62 get_malloc_leak_info(&info, &overallSize, &infoSize, &totalMemory, &backtraceSize);
63
64 size_t count;
65 if (info == nullptr || overallSize == 0 || infoSize == 0
66 || (count = overallSize / infoSize) == 0) {
67 ALOGD("no malloc info, libc.debug.malloc.program property should be set");
68 return std::string();
69 }
70
71 std::ostringstream oss;
72 oss << totalMemory << " bytes in " << count << " allocations\n";
73 oss << " ABI: '" ABI_STRING "'" << "\n\n";
74 if (count > limit) count = limit;
75
76 // The memory is sorted based on total size which is useful for finding
77 // worst memory offenders. For diffs, sometimes it is preferable to sort
78 // based on the backtrace.
79 for (size_t i = 0; i < count; i++) {
80 struct AllocEntry {
81 size_t size; // bit 31 is set if this is zygote allocated memory
82 size_t allocations;
83 uintptr_t backtrace[];
84 };
85
86 const AllocEntry * const e = (AllocEntry *)(info + i * infoSize);
87
88 oss << (e->size * e->allocations)
89 << " bytes ( " << e->size << " bytes * " << e->allocations << " allocations )\n";
90 oss << backtrace_string(e->backtrace, backtraceSize) << "\n";
91 }
92 oss << "\n";
93 free_malloc_leak_info(info);
94 return oss.str();
95 }
96
97 } // namespace android
98