// Copyright 2019 The Chromium Authors. All rights reserved. // 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 #include "base/check.h" #include "base/profiler/stack_copier_signal.h" #include "base/profiler/stack_sampler_impl.h" #include "base/profiler/thread_delegate_posix.h" #include "base/profiler/unwinder.h" #include "base/threading/platform_thread.h" namespace base { std::unique_ptr StackSampler::Create( SamplingProfilerThreadToken thread_token, ModuleCache* module_cache, UnwindersFactory core_unwinders_factory, RepeatingClosure record_sample_callback, StackSamplerTestDelegate* test_delegate) { auto thread_delegate = ThreadDelegatePosix::Create(thread_token); if (!thread_delegate) return nullptr; return std::make_unique( std::make_unique(std::move(thread_delegate)), std::move(core_unwinders_factory), module_cache, std::move(record_sample_callback), test_delegate); } 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); } // 1MB is default thread limit set by Android at art/runtime/thread_pool.h. constexpr size_t kDefaultStackLimit = 1 << 20; return stack_size > 0 ? stack_size : kDefaultStackLimit; } } // namespace base