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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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51 Address tos; // Top stack value (*sp). | 51 Address tos; // Top stack value (*sp). |
52 Address external_callback; | 52 Address external_callback; |
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 : 5; |
62 }; | 62 }; |
63 | 63 |
64 class Sampler { | 64 class Sampler { |
65 public: | 65 public: |
66 // Initializes the Sampler support. Called once at VM startup. | 66 // Initializes the Sampler support. Called once at VM startup. |
67 static void SetUp(); | 67 static void SetUp(); |
68 static void TearDown(); | 68 static void TearDown(); |
69 | 69 |
70 // Initialize sampler. | 70 // Initialize sampler. |
71 Sampler(Isolate* isolate, int interval); | 71 Sampler(Isolate* isolate, int interval); |
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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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