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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/bind.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 {
namespace {
std::vector<std::unique_ptr<Unwinder>> CreateUnwinders(
ModuleCache* module_cache) {
std::vector<std::unique_ptr<Unwinder>> unwinders;
unwinders.push_back(std::make_unique<NativeUnwinderMac>(module_cache));
return unwinders;
}
} // namespace
// static
std::unique_ptr<StackSampler> StackSampler::Create(
SamplingProfilerThreadToken thread_token,
ModuleCache* module_cache,
UnwindersFactory core_unwinders_factory,
RepeatingClosure record_sample_callback,
StackSamplerTestDelegate* test_delegate) {
DCHECK(!core_unwinders_factory);
return std::make_unique<StackSamplerImpl>(
std::make_unique<StackCopierSuspend>(
std::make_unique<SuspendableThreadDelegateMac>(thread_token)),
BindOnce(&CreateUnwinders, Unretained(module_cache)), module_cache,
std::move(record_sample_callback), 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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