1 // Copyright 2017 The Chromium Authors. All rights reserved.
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 "base/bind.h"
8 #include "base/check.h"
9 #include "base/profiler/native_unwinder_mac.h"
10 #include "base/profiler/stack_copier_suspend.h"
11 #include "base/profiler/stack_sampler_impl.h"
12 #include "base/profiler/suspendable_thread_delegate_mac.h"
13
14 namespace base {
15
16 namespace {
17
CreateUnwinders(ModuleCache * module_cache)18 std::vector<std::unique_ptr<Unwinder>> CreateUnwinders(
19 ModuleCache* module_cache) {
20 std::vector<std::unique_ptr<Unwinder>> unwinders;
21 unwinders.push_back(std::make_unique<NativeUnwinderMac>(module_cache));
22 return unwinders;
23 }
24
25 } // namespace
26
27 // static
Create(SamplingProfilerThreadToken thread_token,ModuleCache * module_cache,UnwindersFactory core_unwinders_factory,RepeatingClosure record_sample_callback,StackSamplerTestDelegate * test_delegate)28 std::unique_ptr<StackSampler> StackSampler::Create(
29 SamplingProfilerThreadToken thread_token,
30 ModuleCache* module_cache,
31 UnwindersFactory core_unwinders_factory,
32 RepeatingClosure record_sample_callback,
33 StackSamplerTestDelegate* test_delegate) {
34 DCHECK(!core_unwinders_factory);
35 return std::make_unique<StackSamplerImpl>(
36 std::make_unique<StackCopierSuspend>(
37 std::make_unique<SuspendableThreadDelegateMac>(thread_token)),
38 BindOnce(&CreateUnwinders, Unretained(module_cache)), module_cache,
39 std::move(record_sample_callback), test_delegate);
40 }
41
42 // static
GetStackBufferSize()43 size_t StackSampler::GetStackBufferSize() {
44 size_t stack_size = PlatformThread::GetDefaultThreadStackSize();
45
46 // If getrlimit somehow fails, return the default macOS main thread stack size
47 // of 8 MB (DFLSSIZ in <i386/vmparam.h>) with extra wiggle room.
48 return stack_size > 0 ? stack_size : 12 * 1024 * 1024;
49 }
50
51 } // namespace base
52