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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/memory/madv_free_discardable_memory_allocator_posix.h"
#include <inttypes.h>
#include <sys/mman.h>
#include "base/process/process_metrics.h"
#include "base/strings/string_number_conversions.h"
#include "base/task/single_thread_task_runner.h"
#include "base/tracing_buildflags.h"
#if BUILDFLAG(ENABLE_BASE_TRACING)
#include "base/trace_event/memory_dump_manager.h" // no-presubmit-check
#endif // BUILDFLAG(ENABLE_BASE_TRACING)
namespace base {
MadvFreeDiscardableMemoryAllocatorPosix::
MadvFreeDiscardableMemoryAllocatorPosix() {
#if BUILDFLAG(ENABLE_BASE_TRACING)
// Don't register dump provider if
// SingleThreadTaskRunner::CurrentDefaultHAndle is not set, such as in tests
// and Android Webview.
if (base::SingleThreadTaskRunner::HasCurrentDefault()) {
trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
this, "MadvFreeDiscardableMemoryAllocator",
SingleThreadTaskRunner::GetCurrentDefault());
}
#endif // BUILDFLAG(ENABLE_BASE_TRACING)
}
MadvFreeDiscardableMemoryAllocatorPosix::
~MadvFreeDiscardableMemoryAllocatorPosix() {
#if BUILDFLAG(ENABLE_BASE_TRACING)
trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider(this);
#endif // BUILDFLAG(ENABLE_BASE_TRACING)
}
std::unique_ptr<DiscardableMemory>
MadvFreeDiscardableMemoryAllocatorPosix::AllocateLockedDiscardableMemory(
size_t size) {
return std::make_unique<MadvFreeDiscardableMemoryPosix>(size,
&bytes_allocated_);
}
size_t MadvFreeDiscardableMemoryAllocatorPosix::GetBytesAllocated() const {
return bytes_allocated_;
}
bool MadvFreeDiscardableMemoryAllocatorPosix::OnMemoryDump(
const trace_event::MemoryDumpArgs& args,
trace_event::ProcessMemoryDump* pmd) {
#if BUILDFLAG(ENABLE_BASE_TRACING)
if (args.level_of_detail !=
base::trace_event::MemoryDumpLevelOfDetail::kBackground) {
return true;
}
base::trace_event::MemoryAllocatorDump* total_dump =
pmd->CreateAllocatorDump("discardable/madv_free_allocated");
total_dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
base::trace_event::MemoryAllocatorDump::kUnitsBytes,
GetBytesAllocated());
return true;
#else // BUILDFLAG(ENABLE_BASE_TRACING)
return false;
#endif // BUILDFLAG(ENABLE_BASE_TRACING)
}
} // namespace base
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