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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 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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62 top_frame_type(StackFrame::NONE) {} | 62 top_frame_type(StackFrame::NONE) {} |
63 void Init(Isolate* isolate, const RegisterState& state); | 63 void Init(Isolate* isolate, const RegisterState& state); |
64 StateTag state; // The state of the VM. | 64 StateTag state; // The state of the VM. |
65 Address pc; // Instruction pointer. | 65 Address pc; // Instruction pointer. |
66 union { | 66 union { |
67 Address tos; // Top stack value (*sp). | 67 Address tos; // Top stack value (*sp). |
68 Address external_callback; | 68 Address external_callback; |
69 }; | 69 }; |
70 static const int kMaxFramesCount = 64; | 70 static const int kMaxFramesCount = 64; |
71 Address stack[kMaxFramesCount]; // Call stack. | 71 Address stack[kMaxFramesCount]; // Call stack. |
| 72 TimeTicks timestamp; |
72 int frames_count : 8; // Number of captured frames. | 73 int frames_count : 8; // Number of captured frames. |
73 bool has_external_callback : 1; | 74 bool has_external_callback : 1; |
74 StackFrame::Type top_frame_type : 4; | 75 StackFrame::Type top_frame_type : 4; |
75 }; | 76 }; |
76 | 77 |
77 class Sampler { | 78 class Sampler { |
78 public: | 79 public: |
79 // Initializes the Sampler support. Called once at VM startup. | 80 // Initializes the Sampler support. Called once at VM startup. |
80 static void SetUp(); | 81 static void SetUp(); |
81 static void TearDown(); | 82 static void TearDown(); |
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141 bool is_counting_samples_; | 142 bool is_counting_samples_; |
142 // Counts stack samples taken in JS VM state. | 143 // Counts stack samples taken in JS VM state. |
143 unsigned js_and_external_sample_count_; | 144 unsigned js_and_external_sample_count_; |
144 DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler); | 145 DISALLOW_IMPLICIT_CONSTRUCTORS(Sampler); |
145 }; | 146 }; |
146 | 147 |
147 | 148 |
148 } } // namespace v8::internal | 149 } } // namespace v8::internal |
149 | 150 |
150 #endif // V8_SAMPLER_H_ | 151 #endif // V8_SAMPLER_H_ |
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