f2f7a840f9
Add detection code for a field trial comparing different implementations of discardable memory, targeting a very specific subset of devices and platforms which possess required capabilities. Further details in bug if required. Bug: 1014513 Change-Id: Id81a19b06e0c94fa6090ef1d5f6d2cd7fdd80e1b Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1922749 Commit-Queue: Gordon Guan <gordonguan@google.com> Reviewed-by: Egor Pasko <pasko@chromium.org> Reviewed-by: Daniel Cheng <dcheng@chromium.org> Reviewed-by: Michael Thiessen <mthiesse@chromium.org> Cr-Commit-Position: refs/heads/master@{#719665}
49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
// Copyright 2019 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <utility>
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#include "base/command_line.h"
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#include "base/memory/discardable_memory.h"
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#include "content/child/child_process.h"
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#include "content/child/child_thread_impl.h"
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#include "content/public/common/content_switches.h"
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#include "content/renderer/discardable_memory_utils.h"
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#if defined(OS_POSIX)
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#include <sys/mman.h>
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#include <sys/utsname.h>
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#include "base/memory/madv_free_discardable_memory_allocator_posix.h"
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#include "base/memory/madv_free_discardable_memory_posix.h"
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#endif
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#if defined(OS_ANDROID)
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#include <third_party/ashmem/ashmem.h>
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#endif
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namespace content {
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std::unique_ptr<base::DiscardableMemoryAllocator>
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CreateDiscardableMemoryAllocator() {
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#if defined(OS_POSIX)
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if (base::GetDiscardableMemoryBacking() ==
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base::DiscardableMemoryBacking::kMadvFree) {
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DVLOG(1) << "Using MADV_FREE for discardable memory";
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return std::make_unique<base::MadvFreeDiscardableMemoryAllocatorPosix>();
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}
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#endif // defined(OS_POSIX)
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DVLOG(1) << "Using shared memory for discardable memory";
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mojo::PendingRemote<discardable_memory::mojom::DiscardableSharedMemoryManager>
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manager_remote;
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ChildThread::Get()->BindHostReceiver(
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manager_remote.InitWithNewPipeAndPassReceiver());
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return std::make_unique<
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discardable_memory::ClientDiscardableSharedMemoryManager>(
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std::move(manager_remote), ChildProcess::current()->io_task_runner());
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}
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} // namespace content
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