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// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/trace_event/malloc_dump_provider.h"
#include <malloc.h>
#include "base/trace_event/process_memory_dump.h"
namespace base {
namespace trace_event {
namespace {
const char kDumperFriendlyName[] = "Malloc";
const char kDumperName[] = "malloc";
} // namespace
// static
MallocDumpProvider* MallocDumpProvider::GetInstance() {
return Singleton<MallocDumpProvider,
LeakySingletonTraits<MallocDumpProvider>>::get();
}
MallocDumpProvider::MallocDumpProvider() {
}
MallocDumpProvider::~MallocDumpProvider() {
}
// Called at trace dump point time. Creates a snapshot the memory counters for
// the current process.
bool MallocDumpProvider::DumpInto(ProcessMemoryDump* pmd) {
struct mallinfo info = mallinfo();
DCHECK(info.uordblks > 0);
DCHECK_GE(info.arena + info.hblkhd, info.uordblks);
MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(kDumperName);
if (!dump)
return false;
// When the system allocator is implemented by tcmalloc, the total physical
// size is given by |arena| and |hblkhd| is 0. In case of Android's jemalloc
// |arena| is 0 and the outer pages size is reported by |hblkhd|. In case of
// dlmalloc the total is given by |arena| + |hblkhd|.
// For more details see link: http://goo.gl/fMR8lF.
dump->set_physical_size_in_bytes(info.arena + info.hblkhd);
// mallinfo doesn't support any allocated object count.
dump->set_allocated_objects_count(0);
// Total allocated space is given by |uordblks|.
dump->set_allocated_objects_size_in_bytes(info.uordblks);
return true;
}
const char* MallocDumpProvider::GetFriendlyName() const {
return kDumperFriendlyName;
}
} // namespace trace_event
} // namespace base
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