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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 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 | 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_TRACE_EVENT_HEAP_PROFILER_ALLOCATION_CONTEXT_TRACKER_H_ | 5 #ifndef BASE_TRACE_EVENT_HEAP_PROFILER_ALLOCATION_CONTEXT_TRACKER_H_ |
6 #define BASE_TRACE_EVENT_HEAP_PROFILER_ALLOCATION_CONTEXT_TRACKER_H_ | 6 #define BASE_TRACE_EVENT_HEAP_PROFILER_ALLOCATION_CONTEXT_TRACKER_H_ |
7 | 7 |
8 #include <vector> | 8 #include <vector> |
9 | 9 |
10 #include "base/atomicops.h" | 10 #include "base/atomicops.h" |
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45 | 45 |
46 // Returns the thread-local instance, creating one if necessary. Returns | 46 // Returns the thread-local instance, creating one if necessary. Returns |
47 // always a valid instance, unless it is called re-entrantly, in which case | 47 // always a valid instance, unless it is called re-entrantly, in which case |
48 // returns nullptr in the nested calls. | 48 // returns nullptr in the nested calls. |
49 static AllocationContextTracker* GetInstanceForCurrentThread(); | 49 static AllocationContextTracker* GetInstanceForCurrentThread(); |
50 | 50 |
51 // Set the thread name in the AllocationContextTracker of the current thread | 51 // Set the thread name in the AllocationContextTracker of the current thread |
52 // if capture is enabled. | 52 // if capture is enabled. |
53 static void SetCurrentThreadName(const char* name); | 53 static void SetCurrentThreadName(const char* name); |
54 | 54 |
| 55 // Starts and ends a new ignore scope between which the allocations are |
| 56 // ignored in the heap profiler. A dummy context that short circuits to |
| 57 // "tracing_overhead" is returned for these allocations. |
| 58 void begin_ignore_scope() { ignore_scope_depth_++; } |
| 59 void end_ignore_scope() { |
| 60 if (ignore_scope_depth_) |
| 61 ignore_scope_depth_--; |
| 62 } |
| 63 |
55 // Pushes a frame onto the thread-local pseudo stack. | 64 // Pushes a frame onto the thread-local pseudo stack. |
56 void PushPseudoStackFrame(const char* trace_event_name); | 65 void PushPseudoStackFrame(const char* trace_event_name); |
57 | 66 |
58 // Pops a frame from the thread-local pseudo stack. | 67 // Pops a frame from the thread-local pseudo stack. |
59 void PopPseudoStackFrame(const char* trace_event_name); | 68 void PopPseudoStackFrame(const char* trace_event_name); |
60 | 69 |
61 // Push and pop current task's context. A stack is used to support nested | 70 // Push and pop current task's context. A stack is used to support nested |
62 // tasks and the top of the stack will be used in allocation context. | 71 // tasks and the top of the stack will be used in allocation context. |
63 void PushCurrentTaskContext(const char* context); | 72 void PushCurrentTaskContext(const char* context); |
64 void PopCurrentTaskContext(const char* context); | 73 void PopCurrentTaskContext(const char* context); |
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76 // The pseudo stack where frames are |TRACE_EVENT| names. | 85 // The pseudo stack where frames are |TRACE_EVENT| names. |
77 std::vector<const char*> pseudo_stack_; | 86 std::vector<const char*> pseudo_stack_; |
78 | 87 |
79 // The thread name is used as the first entry in the pseudo stack. | 88 // The thread name is used as the first entry in the pseudo stack. |
80 const char* thread_name_; | 89 const char* thread_name_; |
81 | 90 |
82 // Stack of tasks' contexts. Context serves as a different dimension than | 91 // Stack of tasks' contexts. Context serves as a different dimension than |
83 // pseudo stack to cluster allocations. | 92 // pseudo stack to cluster allocations. |
84 std::vector<const char*> task_contexts_; | 93 std::vector<const char*> task_contexts_; |
85 | 94 |
| 95 uint32_t ignore_scope_depth_; |
| 96 |
86 DISALLOW_COPY_AND_ASSIGN(AllocationContextTracker); | 97 DISALLOW_COPY_AND_ASSIGN(AllocationContextTracker); |
87 }; | 98 }; |
88 | 99 |
89 } // namespace trace_event | 100 } // namespace trace_event |
90 } // namespace base | 101 } // namespace base |
91 | 102 |
92 #endif // BASE_TRACE_EVENT_HEAP_PROFILER_ALLOCATION_CONTEXT_TRACKER_H_ | 103 #endif // BASE_TRACE_EVENT_HEAP_PROFILER_ALLOCATION_CONTEXT_TRACKER_H_ |
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