| Avi Drissman | e4622aa | 2022-09-08 20:36:06 | [diff] [blame] | 1 | // Copyright 2019 The Chromium Authors |
| Charlie Andrews | 63dbdf6 | 2019-07-30 20:55:49 | [diff] [blame] | 2 | // Use of this source code is governed by a BSD-style license that can be |
| 3 | // found in the LICENSE file. |
| 4 | |
| 5 | #include "base/profiler/stack_sampler.h" |
| 6 | |
| 7 | #include <pthread.h> |
| 8 | |
| Mike Wittman | d793287 | 2020-05-14 20:33:48 | [diff] [blame] | 9 | #include "base/check.h" |
| Mike Wittman | 9d409c23 | 2022-11-02 02:32:41 | [diff] [blame] | 10 | #include "base/memory/ptr_util.h" |
| Mike Wittman | fe998b3 | 2019-09-06 21:35:22 | [diff] [blame] | 11 | #include "base/profiler/stack_copier_signal.h" |
| Mike Wittman | 1834978 | 2019-10-22 17:11:22 | [diff] [blame] | 12 | #include "base/profiler/thread_delegate_posix.h" |
| Etienne Pierre-doray | 3bc9c6f2 | 2020-03-31 19:20:37 | [diff] [blame] | 13 | #include "base/profiler/unwinder.h" |
| Charlie Andrews | 63dbdf6 | 2019-07-30 20:55:49 | [diff] [blame] | 14 | #include "base/threading/platform_thread.h" |
| 15 | |
| 16 | namespace base { |
| 17 | |
| 18 | std::unique_ptr<StackSampler> StackSampler::Create( |
| Mike Wittman | eb9eb9b | 2019-10-24 16:08:25 | [diff] [blame] | 19 | SamplingProfilerThreadToken thread_token, |
| Charlie Andrews | 63dbdf6 | 2019-07-30 20:55:49 | [diff] [blame] | 20 | ModuleCache* module_cache, |
| Mike Wittman | f824d26 | 2020-09-22 06:05:40 | [diff] [blame] | 21 | UnwindersFactory core_unwinders_factory, |
| Etienne Pierre-doray | 60129f7 | 2020-06-29 17:22:55 | [diff] [blame] | 22 | RepeatingClosure record_sample_callback, |
| Mike Wittman | d793287 | 2020-05-14 20:33:48 | [diff] [blame] | 23 | StackSamplerTestDelegate* test_delegate) { |
| ssid | 30dea2a | 2020-09-25 23:51:29 | [diff] [blame] | 24 | auto thread_delegate = ThreadDelegatePosix::Create(thread_token); |
| 25 | if (!thread_delegate) |
| 26 | return nullptr; |
| Mike Wittman | 9d409c23 | 2022-11-02 02:32:41 | [diff] [blame] | 27 | return base::WrapUnique(new StackSampler( |
| ssid | 30dea2a | 2020-09-25 23:51:29 | [diff] [blame] | 28 | std::make_unique<StackCopierSignal>(std::move(thread_delegate)), |
| Mike Wittman | f824d26 | 2020-09-22 06:05:40 | [diff] [blame] | 29 | std::move(core_unwinders_factory), module_cache, |
| Mike Wittman | 9d409c23 | 2022-11-02 02:32:41 | [diff] [blame] | 30 | std::move(record_sample_callback), test_delegate)); |
| Charlie Andrews | 63dbdf6 | 2019-07-30 20:55:49 | [diff] [blame] | 31 | } |
| 32 | |
| 33 | size_t StackSampler::GetStackBufferSize() { |
| 34 | size_t stack_size = PlatformThread::GetDefaultThreadStackSize(); |
| 35 | |
| 36 | pthread_attr_t attr; |
| 37 | if (stack_size == 0 && pthread_attr_init(&attr) == 0) { |
| 38 | if (pthread_attr_getstacksize(&attr, &stack_size) != 0) |
| 39 | stack_size = 0; |
| 40 | pthread_attr_destroy(&attr); |
| 41 | } |
| 42 | |
| 43 | // 1MB is default thread limit set by Android at art/runtime/thread_pool.h. |
| 44 | constexpr size_t kDefaultStackLimit = 1 << 20; |
| 45 | return stack_size > 0 ? stack_size : kDefaultStackLimit; |
| 46 | } |
| 47 | |
| 48 | } // namespace base |