52 lines
1.7 KiB
C++
52 lines
1.7 KiB
C++
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// Copyright 2015 The Chromium Authors
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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 "base/profiler/stack_sampler.h"
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#include "base/check.h"
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#include "base/functional/bind.h"
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#include "base/memory/ptr_util.h"
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#include "base/profiler/native_unwinder_win.h"
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#include "base/profiler/stack_copier_suspend.h"
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#include "base/profiler/suspendable_thread_delegate_win.h"
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#include "build/build_config.h"
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namespace base {
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// static
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std::unique_ptr<StackSampler> StackSampler::Create(
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SamplingProfilerThreadToken thread_token,
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ModuleCache* module_cache,
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UnwindersFactory core_unwinders_factory,
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RepeatingClosure record_sample_callback,
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StackSamplerTestDelegate* test_delegate) {
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DCHECK(!core_unwinders_factory);
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#if defined(ARCH_CPU_X86_64) || defined(ARCH_CPU_ARM64)
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const auto create_unwinders = []() {
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std::vector<std::unique_ptr<Unwinder>> unwinders;
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unwinders.push_back(std::make_unique<NativeUnwinderWin>());
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return unwinders;
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};
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return base::WrapUnique(new StackSampler(
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std::make_unique<StackCopierSuspend>(
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std::make_unique<SuspendableThreadDelegateWin>(thread_token)),
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BindOnce(create_unwinders), module_cache,
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std::move(record_sample_callback), test_delegate));
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#else
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return nullptr;
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#endif
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}
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// static
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size_t StackSampler::GetStackBufferSize() {
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// The default Win32 reserved stack size is 1 MB and Chrome Windows threads
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// currently always use the default, but this allows for expansion if it
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// occurs. The size beyond the actual stack size consists of unallocated
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// virtual memory pages so carries little cost (just a bit of wasted address
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// space).
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return 2 << 20; // 2 MiB
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}
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} // namespace base
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