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| 1 // Copyright 2015 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 #ifndef COMPONENTS_TRACING_CHILD_CHILD_MEMORY_DUMP_MANAGER_DELEGATE_IMPL_H_ | |
| 6 #define COMPONENTS_TRACING_CHILD_CHILD_MEMORY_DUMP_MANAGER_DELEGATE_IMPL_H_ | |
| 7 | |
| 8 #include "base/trace_event/memory_dump_manager.h" | |
| 9 | |
| 10 #include <stdint.h> | |
| 11 | |
| 12 #include "base/macros.h" | |
| 13 #include "base/memory/ref_counted.h" | |
| 14 #include "base/memory/singleton.h" | |
| 15 #include "base/synchronization/lock.h" | |
| 16 #include "components/tracing/tracing_export.h" | |
| 17 | |
| 18 namespace base { | |
| 19 class SingleThreadTaskRunner; | |
| 20 } // namespace base | |
| 21 | |
| 22 namespace tracing { | |
| 23 | |
| 24 class ChildTraceMessageFilter; | |
| 25 | |
| 26 // This class is a simple proxy class between the MemoryDumpManager and the | |
| 27 // ChildTraceMessageFilter. It's only purpose is to adapt the lifetime of | |
| 28 // CTMF to the demands of MDM, which expects the delegate to be thread-safe | |
| 29 // and long lived. CTMF, instead, can be torn down during browser shutdown. | |
| 30 // This class is registered as MDM delegate in child processes and handles | |
| 31 // gracefully (and thread-safely) failures in the case of a lack of the CTMF. | |
| 32 class TRACING_EXPORT ChildMemoryDumpManagerDelegateImpl | |
| 33 : public base::trace_event::MemoryDumpManagerDelegate { | |
| 34 public: | |
| 35 static ChildMemoryDumpManagerDelegateImpl* GetInstance(); | |
| 36 | |
| 37 // base::trace_event::MemoryDumpManagerDelegate implementation. | |
| 38 void RequestGlobalMemoryDump( | |
| 39 const base::trace_event::MemoryDumpRequestArgs& args, | |
| 40 const base::trace_event::MemoryDumpCallback& callback) override; | |
| 41 uint64_t GetTracingProcessId() const override; | |
| 42 | |
| 43 void SetChildTraceMessageFilter(ChildTraceMessageFilter* ctmf); | |
| 44 | |
| 45 // Pass kInvalidTracingProcessId to invalidate the id. | |
| 46 void set_tracing_process_id(uint64_t id) { | |
| 47 DCHECK(tracing_process_id_ == | |
| 48 base::trace_event::MemoryDumpManager::kInvalidTracingProcessId || | |
| 49 id == | |
| 50 base::trace_event::MemoryDumpManager::kInvalidTracingProcessId || | |
| 51 id == tracing_process_id_); | |
| 52 tracing_process_id_ = id; | |
| 53 } | |
| 54 | |
| 55 protected: | |
| 56 // Make CreateProcessDump() visible to ChildTraceMessageFilter. | |
| 57 friend class ChildTraceMessageFilter; | |
| 58 | |
| 59 private: | |
| 60 friend struct base::DefaultSingletonTraits< | |
| 61 ChildMemoryDumpManagerDelegateImpl>; | |
| 62 | |
| 63 ChildMemoryDumpManagerDelegateImpl(); | |
| 64 ~ChildMemoryDumpManagerDelegateImpl() override; | |
| 65 | |
| 66 ChildTraceMessageFilter* ctmf_; // Not owned. | |
| 67 | |
| 68 // The SingleThreadTaskRunner where the |ctmf_| lives. | |
| 69 // It is NULL iff |cmtf_| is NULL. | |
| 70 scoped_refptr<base::SingleThreadTaskRunner> ctmf_task_runner_; | |
| 71 | |
| 72 // Protects from concurrent access to |ctmf_task_runner_| to allow | |
| 73 // RequestGlobalMemoryDump to be called from arbitrary threads. | |
| 74 base::Lock lock_; | |
| 75 | |
| 76 // The unique id of the child process, created for tracing and is expected to | |
| 77 // be valid only when tracing is enabled. | |
| 78 uint64_t tracing_process_id_; | |
| 79 | |
| 80 DISALLOW_COPY_AND_ASSIGN(ChildMemoryDumpManagerDelegateImpl); | |
| 81 }; | |
| 82 | |
| 83 } // namespace tracing | |
| 84 | |
| 85 #endif // COMPONENTS_TRACING_CHILD_CHILD_MEMORY_DUMP_MANAGER_DELEGATE_IMPL_H_ | |
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Chromium Code Reviews
Issue 2694083005:
memory-infra: Finish moving memory_infra from TracingController (Closed)
