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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project 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 V8_PROFILER_SAMPLER_H_ | 5 #ifndef V8_PROFILER_SAMPLER_H_ |
6 #define V8_PROFILER_SAMPLER_H_ | 6 #define V8_PROFILER_SAMPLER_H_ |
7 | 7 |
8 #include "include/v8.h" | 8 #include "include/v8.h" |
9 | 9 |
10 #include "src/base/atomicops.h" | 10 #include "src/base/atomicops.h" |
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27 // TickSample captures the information collected for each sample. | 27 // TickSample captures the information collected for each sample. |
28 struct TickSample { | 28 struct TickSample { |
29 // Internal profiling (with --prof + tools/$OS-tick-processor) wants to | 29 // Internal profiling (with --prof + tools/$OS-tick-processor) wants to |
30 // include the runtime function we're calling. Externally exposed tick | 30 // include the runtime function we're calling. Externally exposed tick |
31 // samples don't care. | 31 // samples don't care. |
32 enum RecordCEntryFrame { kIncludeCEntryFrame, kSkipCEntryFrame }; | 32 enum RecordCEntryFrame { kIncludeCEntryFrame, kSkipCEntryFrame }; |
33 | 33 |
34 TickSample() | 34 TickSample() |
35 : state(OTHER), | 35 : state(OTHER), |
36 pc(NULL), | 36 pc(NULL), |
37 external_callback(NULL), | 37 external_callback_entry(NULL), |
38 frames_count(0), | 38 frames_count(0), |
39 has_external_callback(false), | 39 has_external_callback(false), |
40 update_stats(true), | 40 update_stats(true), |
41 top_frame_type(StackFrame::NONE) {} | 41 top_frame_type(StackFrame::NONE) {} |
42 void Init(Isolate* isolate, const v8::RegisterState& state, | 42 void Init(Isolate* isolate, const v8::RegisterState& state, |
43 RecordCEntryFrame record_c_entry_frame, bool update_stats); | 43 RecordCEntryFrame record_c_entry_frame, bool update_stats); |
44 static void GetStackSample(Isolate* isolate, const v8::RegisterState& state, | 44 static void GetStackSample(Isolate* isolate, const v8::RegisterState& state, |
45 RecordCEntryFrame record_c_entry_frame, | 45 RecordCEntryFrame record_c_entry_frame, |
46 void** frames, size_t frames_limit, | 46 void** frames, size_t frames_limit, |
47 v8::SampleInfo* sample_info); | 47 v8::SampleInfo* sample_info); |
48 StateTag state; // The state of the VM. | 48 StateTag state; // The state of the VM. |
49 Address pc; // Instruction pointer. | 49 Address pc; // Instruction pointer. |
50 union { | 50 union { |
51 Address tos; // Top stack value (*sp). | 51 Address tos; // Top stack value (*sp). |
52 Address external_callback; | 52 Address external_callback_entry; |
53 }; | 53 }; |
54 static const unsigned kMaxFramesCountLog2 = 8; | 54 static const unsigned kMaxFramesCountLog2 = 8; |
55 static const unsigned kMaxFramesCount = (1 << kMaxFramesCountLog2) - 1; | 55 static const unsigned kMaxFramesCount = (1 << kMaxFramesCountLog2) - 1; |
56 Address stack[kMaxFramesCount]; // Call stack. | 56 Address stack[kMaxFramesCount]; // Call stack. |
57 base::TimeTicks timestamp; | 57 base::TimeTicks timestamp; |
58 unsigned frames_count : kMaxFramesCountLog2; // Number of captured frames. | 58 unsigned frames_count : kMaxFramesCountLog2; // Number of captured frames. |
59 bool has_external_callback : 1; | 59 bool has_external_callback : 1; |
60 bool update_stats : 1; // Whether the sample should update aggregated stats. | 60 bool update_stats : 1; // Whether the sample should update aggregated stats. |
61 StackFrame::Type top_frame_type : 4; | 61 StackFrame::Type top_frame_type : 4; |
62 }; | 62 }; |
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130 unsigned js_sample_count_; | 130 unsigned js_sample_count_; |
131 unsigned external_sample_count_; | 131 unsigned external_sample_count_; |
132 DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler); | 132 DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler); |
133 }; | 133 }; |
134 | 134 |
135 | 135 |
136 } // namespace internal | 136 } // namespace internal |
137 } // namespace v8 | 137 } // namespace v8 |
138 | 138 |
139 #endif // V8_PROFILER_SAMPLER_H_ | 139 #endif // V8_PROFILER_SAMPLER_H_ |
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