Repo created

TMessagesProj/jni/voip/webrtc/base/profiler/stack_sampler_impl.h

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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.
+
+#ifndef BASE_PROFILER_STACK_SAMPLER_IMPL_H_
+#define BASE_PROFILER_STACK_SAMPLER_IMPL_H_
+
+#include <memory>
+
+#include "base/base_export.h"
+#include "base/profiler/frame.h"
+#include "base/profiler/register_context.h"
+#include "base/profiler/stack_copier.h"
+#include "base/profiler/stack_sampler.h"
+
+namespace base {
+
+class Unwinder;
+
+// Cross-platform stack sampler implementation. Delegates to StackCopier for the
+// platform-specific stack copying implementation.
+class BASE_EXPORT StackSamplerImpl : public StackSampler {
+ public:
+  StackSamplerImpl(std::unique_ptr<StackCopier> stack_copier,
+                   std::unique_ptr<Unwinder> native_unwinder,
+                   ModuleCache* module_cache,
+                   StackSamplerTestDelegate* test_delegate = nullptr);
+  ~StackSamplerImpl() override;
+
+  StackSamplerImpl(const StackSamplerImpl&) = delete;
+  StackSamplerImpl& operator=(const StackSamplerImpl&) = delete;
+
+  // StackSampler:
+  void AddAuxUnwinder(std::unique_ptr<Unwinder> unwinder) override;
+  void RecordStackFrames(StackBuffer* stack_buffer,
+                         ProfileBuilder* profile_builder) override;
+
+  // Exposes the internal function for unit testing.
+  static std::vector<Frame> WalkStackForTesting(ModuleCache* module_cache,
+                                                RegisterContext* thread_context,
+                                                uintptr_t stack_top,
+                                                Unwinder* native_unwinder,
+                                                Unwinder* aux_unwinder);
+
+ private:
+  static std::vector<Frame> WalkStack(ModuleCache* module_cache,
+                                      RegisterContext* thread_context,
+                                      uintptr_t stack_top,
+                                      Unwinder* native_unwinder,
+                                      Unwinder* aux_unwinder);
+
+  const std::unique_ptr<StackCopier> stack_copier_;
+  const std::unique_ptr<Unwinder> native_unwinder_;
+  std::unique_ptr<Unwinder> aux_unwinder_;
+  ModuleCache* const module_cache_;
+  StackSamplerTestDelegate* const test_delegate_;
+};
+
+}  // namespace base
+
+#endif  // BASE_PROFILER_STACK_SAMPLER_IMPL_H_