MemoryLeakTrackUtil.cpp revision 538ec5e04f389cba637b030757be317fcb8677a8
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 46extern std::string backtrace_string(const uintptr_t* frames, size_t frame_count); 47 48namespace android { 49 50extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize, 51 size_t* infoSize, size_t* totalMemory, size_t* backtraceSize); 52 53extern "C" void free_malloc_leak_info(uint8_t* info); 54 55std::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