1/* 2 * Copyright 2017, 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#define DEBUG false // STOPSHIP if true 18#include "Log.h" 19 20#include <sstream> 21#include "MemoryLeakTrackUtil.h" 22 23/* 24 * The code here originally resided in MediaPlayerService.cpp 25 */ 26 27// Figure out the abi based on defined macros. 28#if defined(__arm__) 29#define ABI_STRING "arm" 30#elif defined(__aarch64__) 31#define ABI_STRING "arm64" 32#elif defined(__mips__) && !defined(__LP64__) 33#define ABI_STRING "mips" 34#elif defined(__mips__) && defined(__LP64__) 35#define ABI_STRING "mips64" 36#elif defined(__i386__) 37#define ABI_STRING "x86" 38#elif defined(__x86_64__) 39#define ABI_STRING "x86_64" 40#else 41#error "Unsupported ABI" 42#endif 43 44extern std::string backtrace_string(const uintptr_t* frames, size_t frame_count); 45 46namespace android { 47namespace os { 48namespace statsd { 49 50extern "C" void get_malloc_leak_info(uint8_t** info, size_t* overallSize, size_t* infoSize, 51 size_t* totalMemory, size_t* backtraceSize); 52 53extern "C" void free_malloc_leak_info(uint8_t* info); 54 55std::string dumpMemInfo(size_t limit) { 56 uint8_t* info; 57 size_t overallSize; 58 size_t infoSize; 59 size_t totalMemory; 60 size_t backtraceSize; 61 get_malloc_leak_info(&info, &overallSize, &infoSize, &totalMemory, &backtraceSize); 62 63 size_t count; 64 if (info == nullptr || overallSize == 0 || infoSize == 0 || 65 (count = overallSize / infoSize) == 0) { 66 VLOG("no malloc info, libc.debug.malloc.program property should be set"); 67 return std::string(); 68 } 69 70 std::ostringstream oss; 71 oss << totalMemory << " bytes in " << count << " allocations\n"; 72 oss << " ABI: '" ABI_STRING "'" 73 << "\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) << " bytes ( " << e->size << " bytes * " << e->allocations 89 << " 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 statsd 98} // namespace os 99} // namespace android