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1 // Copyright 2017 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef BASE_MEMORY_SHARED_MEMORY_TRACKER_H_ | 5 #ifndef BASE_MEMORY_SHARED_MEMORY_TRACKER_H_ |
6 #define BASE_MEMORY_SHARED_MEMORY_TRACKER_H_ | 6 #define BASE_MEMORY_SHARED_MEMORY_TRACKER_H_ |
7 | 7 |
8 #include "base/memory/shared_memory.h" | 8 #include "base/memory/shared_memory.h" |
9 #include "base/synchronization/lock.h" | 9 #include "base/synchronization/lock.h" |
10 #include "base/trace_event/memory_dump_provider.h" | 10 #include "base/trace_event/memory_dump_provider.h" |
11 | 11 |
12 namespace base { | 12 namespace base { |
13 | 13 |
14 namespace trace_event { | 14 namespace trace_event { |
| 15 class MemoryAllocatorDumpGuid; |
15 class ProcessMemoryDump; | 16 class ProcessMemoryDump; |
16 } | 17 } |
17 | 18 |
18 // SharedMemoryTracker tracks shared memory usage. | 19 // SharedMemoryTracker tracks shared memory usage. |
19 class BASE_EXPORT SharedMemoryTracker | 20 class BASE_EXPORT SharedMemoryTracker |
20 : public base::trace_event::MemoryDumpProvider { | 21 : public base::trace_event::MemoryDumpProvider { |
21 public: | 22 public: |
22 // Returns a singleton instance. | 23 // Returns a singleton instance. |
23 static SharedMemoryTracker* GetInstance(); | 24 static SharedMemoryTracker* GetInstance(); |
24 | 25 |
| 26 // Adds two ownership edges between the given guid |source| and its global |
| 27 // shared memory dump. This helps to get accurate effective size of modules |
| 28 // that backend is shared memory. |
| 29 static bool AddOwnershipEdges( |
| 30 trace_event::ProcessMemoryDump* pmd, |
| 31 const trace_event::MemoryAllocatorDumpGuid& source, |
| 32 const SharedMemoryHandle& shared_memory_handle); |
| 33 static bool AddOwnershipEdges( |
| 34 trace_event::ProcessMemoryDump* pmd, |
| 35 const trace_event::MemoryAllocatorDumpGuid& source, |
| 36 const SharedMemoryHandle& shared_memory_handle, |
| 37 int importance); |
| 38 |
25 // Records shared memory usage on mapping. | 39 // Records shared memory usage on mapping. |
26 void IncrementMemoryUsage(const SharedMemory& shared_memory); | 40 void IncrementMemoryUsage(const SharedMemory& shared_memory); |
27 | 41 |
28 // Records shared memory usage on unmapping. | 42 // Records shared memory usage on unmapping. |
29 void DecrementMemoryUsage(const SharedMemory& shared_memory); | 43 void DecrementMemoryUsage(const SharedMemory& shared_memory); |
30 | 44 |
31 private: | 45 private: |
32 struct Usage { | 46 struct Usage { |
33 Usage(); | 47 Usage(); |
34 Usage(const Usage& rhs); | 48 Usage(const Usage& rhs); |
35 ~Usage(); | 49 ~Usage(); |
36 SharedMemory::UniqueId unique_id; | 50 SharedMemory::UniqueId unique_id; |
37 size_t size; | 51 size_t size; |
38 }; | 52 }; |
39 | 53 |
40 SharedMemoryTracker(); | 54 SharedMemoryTracker(); |
41 ~SharedMemoryTracker() override; | 55 ~SharedMemoryTracker() override; |
42 | 56 |
43 // base::trace_event::MemoryDumpProvider implementation. | 57 // base::trace_event::MemoryDumpProvider implementation. |
44 bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args, | 58 bool OnMemoryDump(const trace_event::MemoryDumpArgs& args, |
45 base::trace_event::ProcessMemoryDump* pmd) override; | 59 trace_event::ProcessMemoryDump* pmd) override; |
46 | 60 |
47 // Used to lock when |usages_| is modified or read. | 61 // Used to lock when |usages_| is modified or read. |
48 Lock usages_lock_; | 62 Lock usages_lock_; |
49 std::unordered_map<const SharedMemory*, Usage> usages_; | 63 std::unordered_map<const SharedMemory*, Usage> usages_; |
50 | 64 |
51 DISALLOW_COPY_AND_ASSIGN(SharedMemoryTracker); | 65 DISALLOW_COPY_AND_ASSIGN(SharedMemoryTracker); |
52 }; | 66 }; |
53 | 67 |
54 } // namespace base | 68 } // namespace base |
55 | 69 |
56 #endif // BASE_MEMORY_SHARED_MEMORY_TRACKER_H_ | 70 #endif // BASE_MEMORY_SHARED_MEMORY_TRACKER_H_ |
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