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75 lines
2.2 KiB
C++
75 lines
2.2 KiB
C++
// 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 <pthread.h>
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#include <memory>
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#include "base/memory/ptr_util.h"
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#include "base/threading/platform_thread.h"
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#include "build/build_config.h"
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#if BUILDFLAG(IS_CHROMEOS) && \
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(defined(ARCH_CPU_X86_64) || defined(ARCH_CPU_ARM64))
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#include "base/check.h"
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#include "base/functional/bind.h"
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#include "base/profiler/frame_pointer_unwinder.h"
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#include "base/profiler/stack_copier_signal.h"
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#include "base/profiler/thread_delegate_posix.h"
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#include "base/profiler/unwinder.h"
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#endif
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namespace base {
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namespace {
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#if BUILDFLAG(IS_CHROMEOS) && \
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(defined(ARCH_CPU_X86_64) || defined(ARCH_CPU_ARM64))
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std::vector<std::unique_ptr<Unwinder>> CreateUnwinders() {
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std::vector<std::unique_ptr<Unwinder>> unwinders;
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unwinders.push_back(std::make_unique<FramePointerUnwinder>());
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return unwinders;
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}
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#endif
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} // namespace
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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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#if BUILDFLAG(IS_CHROMEOS) && \
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(defined(ARCH_CPU_X86_64) || defined(ARCH_CPU_ARM64))
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DCHECK(!core_unwinders_factory);
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return base::WrapUnique(
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new StackSampler(std::make_unique<StackCopierSignal>(
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ThreadDelegatePosix::Create(thread_token)),
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BindOnce(&CreateUnwinders), 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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size_t StackSampler::GetStackBufferSize() {
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size_t stack_size = PlatformThread::GetDefaultThreadStackSize();
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pthread_attr_t attr;
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if (stack_size == 0 && pthread_attr_init(&attr) == 0) {
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if (pthread_attr_getstacksize(&attr, &stack_size) != 0)
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stack_size = 0;
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pthread_attr_destroy(&attr);
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}
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// Maximum limits under NPTL implementation.
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constexpr size_t kDefaultStackLimit = 4 * (1 << 20);
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return stack_size > 0 ? stack_size : kDefaultStackLimit;
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}
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} // namespace base
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