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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_PROFILER_STACK_SAMPLING_PROFILER_H_ | 5 #ifndef BASE_PROFILER_STACK_SAMPLING_PROFILER_H_ |
| 6 #define BASE_PROFILER_STACK_SAMPLING_PROFILER_H_ | 6 #define BASE_PROFILER_STACK_SAMPLING_PROFILER_H_ |
| 7 | 7 |
| 8 #include <string> | 8 #include <string> |
| 9 #include <vector> | 9 #include <vector> |
| 10 | 10 |
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| 56 // The results of the profiling are passed to the completed callback and consist | 56 // The results of the profiling are passed to the completed callback and consist |
| 57 // of a vector of CallStackProfiles. Each CallStackProfile corresponds to a | 57 // of a vector of CallStackProfiles. Each CallStackProfile corresponds to a |
| 58 // burst as specified in SamplingParams and contains a set of Samples and | 58 // burst as specified in SamplingParams and contains a set of Samples and |
| 59 // Modules. One Sample corresponds to a single recorded stack, and the Modules | 59 // Modules. One Sample corresponds to a single recorded stack, and the Modules |
| 60 // record those modules associated with the recorded stack frames. | 60 // record those modules associated with the recorded stack frames. |
| 61 class BASE_EXPORT StackSamplingProfiler { | 61 class BASE_EXPORT StackSamplingProfiler { |
| 62 public: | 62 public: |
| 63 // Module represents the module (DLL or exe) corresponding to a stack frame. | 63 // Module represents the module (DLL or exe) corresponding to a stack frame. |
| 64 struct BASE_EXPORT Module { | 64 struct BASE_EXPORT Module { |
| 65 Module(); | 65 Module(); |
| 66 Module(const void* base_address, const std::string& id, | 66 Module(uintptr_t base_address, |
| 67 const std::string& id, |
| 67 const FilePath& filename); | 68 const FilePath& filename); |
| 68 ~Module(); | 69 ~Module(); |
| 69 | 70 |
| 70 // Points to the base address of the module. | 71 // Points to the base address of the module. |
| 71 const void* base_address; | 72 uintptr_t base_address; |
| 72 | 73 |
| 73 // An opaque binary string that uniquely identifies a particular program | 74 // An opaque binary string that uniquely identifies a particular program |
| 74 // version with high probability. This is parsed from headers of the loaded | 75 // version with high probability. This is parsed from headers of the loaded |
| 75 // module. | 76 // module. |
| 76 // For binaries generated by GNU tools: | 77 // For binaries generated by GNU tools: |
| 77 // Contents of the .note.gnu.build-id field. | 78 // Contents of the .note.gnu.build-id field. |
| 78 // On Windows: | 79 // On Windows: |
| 79 // GUID + AGE in the debug image headers of a module. | 80 // GUID + AGE in the debug image headers of a module. |
| 80 std::string id; | 81 std::string id; |
| 81 | 82 |
| 82 // The filename of the module. | 83 // The filename of the module. |
| 83 FilePath filename; | 84 FilePath filename; |
| 84 }; | 85 }; |
| 85 | 86 |
| 86 // Frame represents an individual sampled stack frame with module information. | 87 // Frame represents an individual sampled stack frame with module information. |
| 87 struct BASE_EXPORT Frame { | 88 struct BASE_EXPORT Frame { |
| 88 // Identifies an unknown module. | 89 // Identifies an unknown module. |
| 89 static const size_t kUnknownModuleIndex = static_cast<size_t>(-1); | 90 static const size_t kUnknownModuleIndex = static_cast<size_t>(-1); |
| 90 | 91 |
| 91 Frame(const void* instruction_pointer, size_t module_index); | 92 Frame(uintptr_t instruction_pointer, size_t module_index); |
| 92 ~Frame(); | 93 ~Frame(); |
| 93 | 94 |
| 95 // Default constructor to satisfy IPC macros. Do not use explicitly. |
| 96 Frame(); |
| 97 |
| 94 // The sampled instruction pointer within the function. | 98 // The sampled instruction pointer within the function. |
| 95 const void* instruction_pointer; | 99 uintptr_t instruction_pointer; |
| 96 | 100 |
| 97 // Index of the module in CallStackProfile::modules. We don't represent | 101 // Index of the module in CallStackProfile::modules. We don't represent |
| 98 // module state directly here to save space. | 102 // module state directly here to save space. |
| 99 size_t module_index; | 103 size_t module_index; |
| 100 }; | 104 }; |
| 101 | 105 |
| 102 // Sample represents a set of stack frames. | 106 // Sample represents a set of stack frames. |
| 103 using Sample = std::vector<Frame>; | 107 using Sample = std::vector<Frame>; |
| 104 | 108 |
| 105 // CallStackProfile represents a set of samples. | 109 // CallStackProfile represents a set of samples. |
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| 233 // The metrics provider code wants to put Samples in a map and compare them, | 237 // The metrics provider code wants to put Samples in a map and compare them, |
| 234 // which requires us to define a few operators. | 238 // which requires us to define a few operators. |
| 235 BASE_EXPORT bool operator==(const StackSamplingProfiler::Frame& a, | 239 BASE_EXPORT bool operator==(const StackSamplingProfiler::Frame& a, |
| 236 const StackSamplingProfiler::Frame& b); | 240 const StackSamplingProfiler::Frame& b); |
| 237 BASE_EXPORT bool operator<(const StackSamplingProfiler::Frame& a, | 241 BASE_EXPORT bool operator<(const StackSamplingProfiler::Frame& a, |
| 238 const StackSamplingProfiler::Frame& b); | 242 const StackSamplingProfiler::Frame& b); |
| 239 | 243 |
| 240 } // namespace base | 244 } // namespace base |
| 241 | 245 |
| 242 #endif // BASE_PROFILER_STACK_SAMPLING_PROFILER_H_ | 246 #endif // BASE_PROFILER_STACK_SAMPLING_PROFILER_H_ |
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