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/*
* Copyright 2011, 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.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "MemoryLeackTrackUtil"
#include <utils/Log.h>
#include <mediautils/MemoryLeakTrackUtil.h>
#include <sstream>
#include <bionic/malloc.h>
/*
* The code here originally resided in MediaPlayerService.cpp
*/
// Figure out the abi based on defined macros.
#if defined(__arm__)
#define ABI_STRING "arm"
#elif defined(__aarch64__)
#define ABI_STRING "arm64"
#elif defined(__mips__) && !defined(__LP64__)
#define ABI_STRING "mips"
#elif defined(__mips__) && defined(__LP64__)
#define ABI_STRING "mips64"
#elif defined(__i386__)
#define ABI_STRING "x86"
#elif defined(__x86_64__)
#define ABI_STRING "x86_64"
#else
#error "Unsupported ABI"
#endif
extern std::string backtrace_string(const uintptr_t* frames, size_t frame_count);
namespace android {
std::string dumpMemoryAddresses(size_t limit)
{
android_mallopt_leak_info_t leak_info;
if (!android_mallopt(M_GET_MALLOC_LEAK_INFO, &leak_info, sizeof(leak_info))) {
return "";
}
size_t count;
if (leak_info.buffer == nullptr || leak_info.overall_size == 0 || leak_info.info_size == 0
|| (count = leak_info.overall_size / leak_info.info_size) == 0) {
ALOGD("no malloc info, libc.debug.malloc.program property should be set");
return "";
}
std::ostringstream oss;
oss << leak_info.total_memory << " bytes in " << count << " allocations\n";
oss << " ABI: '" ABI_STRING "'" << "\n\n";
if (count > limit) count = limit;
// The memory is sorted based on total size which is useful for finding
// worst memory offenders. For diffs, sometimes it is preferable to sort
// based on the backtrace.
for (size_t i = 0; i < count; i++) {
struct AllocEntry {
size_t size; // bit 31 is set if this is zygote allocated memory
size_t allocations;
uintptr_t backtrace[];
};
const AllocEntry * const e = (AllocEntry *)(leak_info.buffer + i * leak_info.info_size);
oss << (e->size * e->allocations)
<< " bytes ( " << e->size << " bytes * " << e->allocations << " allocations )\n";
oss << backtrace_string(e->backtrace, leak_info.backtrace_size) << "\n";
}
oss << "\n";
android_mallopt(M_FREE_MALLOC_LEAK_INFO, &leak_info, sizeof(leak_info));
return oss.str();
}
} // namespace android