| // Copyright 2015 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/profiler/stack_sampler.h" |
| |
| #include <pthread.h> |
| |
| #include <memory> |
| |
| #include "base/memory/ptr_util.h" |
| #include "base/threading/platform_thread.h" |
| #include "build/build_config.h" |
| |
| #if BUILDFLAG(IS_CHROMEOS) && \ |
| (defined(ARCH_CPU_X86_64) || defined(ARCH_CPU_ARM64)) |
| #include "base/profiler/stack_copier_signal.h" |
| #include "base/profiler/thread_delegate_posix.h" |
| #endif |
| |
| namespace base { |
| |
| std::unique_ptr<StackSampler> StackSampler::Create( |
| SamplingProfilerThreadToken thread_token, |
| std::unique_ptr<StackUnwindData> stack_unwind_data, |
| UnwindersFactory core_unwinders_factory, |
| RepeatingClosure record_sample_callback, |
| StackSamplerTestDelegate* test_delegate) { |
| #if BUILDFLAG(IS_CHROMEOS) && \ |
| (defined(ARCH_CPU_X86_64) || defined(ARCH_CPU_ARM64)) |
| return base::WrapUnique(new StackSampler( |
| std::make_unique<StackCopierSignal>( |
| ThreadDelegatePosix::Create(thread_token)), |
| std::move(stack_unwind_data), std::move(core_unwinders_factory), |
| std::move(record_sample_callback), test_delegate)); |
| #else |
| return nullptr; |
| #endif |
| } |
| |
| size_t StackSampler::GetStackBufferSize() { |
| size_t stack_size = PlatformThread::GetDefaultThreadStackSize(); |
| |
| pthread_attr_t attr; |
| if (stack_size == 0 && pthread_attr_init(&attr) == 0) { |
| if (pthread_attr_getstacksize(&attr, &stack_size) != 0) { |
| stack_size = 0; |
| } |
| pthread_attr_destroy(&attr); |
| } |
| |
| // Maximum limits under NPTL implementation. |
| constexpr size_t kDefaultStackLimit = 4 * (1 << 20); |
| return stack_size > 0 ? stack_size : kDefaultStackLimit; |
| } |
| |
| } // namespace base |