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- // 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 <pthread.h>
- #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> 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<StackSamplerImpl>(
- std::make_unique<StackCopierSignal>(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
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