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// Copyright 2017 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 "base/check.h"
#include "base/profiler/native_unwinder_mac.h"
#include "base/profiler/stack_copier_suspend.h"
#include "base/profiler/stack_sampler_impl.h"
#include "base/profiler/suspendable_thread_delegate_mac.h"
namespace base {
// static
std::unique_ptr<StackSampler> StackSampler::Create(
SamplingProfilerThreadToken thread_token,
ModuleCache* module_cache,
std::vector<std::unique_ptr<Unwinder>> core_unwinders,
StackSamplerTestDelegate* test_delegate) {
DCHECK(core_unwinders.empty());
core_unwinders.push_back(std::make_unique<NativeUnwinderMac>(module_cache));
return std::make_unique<StackSamplerImpl>(
std::make_unique<StackCopierSuspend>(
std::make_unique<SuspendableThreadDelegateMac>(thread_token)),
std::move(core_unwinders), module_cache, test_delegate);
}
// static
size_t StackSampler::GetStackBufferSize() {
size_t stack_size = PlatformThread::GetDefaultThreadStackSize();
// If getrlimit somehow fails, return the default macOS main thread stack size
// of 8 MB (DFLSSIZ in <i386/vmparam.h>) with extra wiggle room.
return stack_size > 0 ? stack_size : 12 * 1024 * 1024;
}
} // namespace base
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