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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_NATIVE_STACK_SAMPLER_H_ | 5 #ifndef BASE_PROFILER_NATIVE_STACK_SAMPLER_H_ |
6 #define BASE_PROFILER_NATIVE_STACK_SAMPLER_H_ | 6 #define BASE_PROFILER_NATIVE_STACK_SAMPLER_H_ |
7 | 7 |
8 #include <memory> | 8 #include <memory> |
9 | 9 |
10 #include "base/base_export.h" | 10 #include "base/base_export.h" |
11 #include "base/macros.h" | 11 #include "base/macros.h" |
12 #include "base/profiler/stack_sampling_profiler.h" | 12 #include "base/profiler/stack_sampling_profiler.h" |
13 #include "base/threading/platform_thread.h" | 13 #include "base/threading/platform_thread.h" |
14 | 14 |
15 namespace base { | 15 namespace base { |
16 | 16 |
17 class NativeStackSamplerTestDelegate; | 17 class NativeStackSamplerTestDelegate; |
18 | 18 |
19 // NativeStackSampler is an implementation detail of StackSamplingProfiler. It | 19 // NativeStackSampler is an implementation detail of StackSamplingProfiler. It |
20 // abstracts the native implementation required to record a stack sample for a | 20 // abstracts the native implementation required to record a stack sample for a |
21 // given thread. | 21 // given thread. |
22 class NativeStackSampler { | 22 class NativeStackSampler { |
23 public: | 23 public: |
24 // The thread state as determined by the sampler during it's last attempt. | |
Mike Wittman
2017/02/13 22:35:57
All changes in this file and native_stack_sampler_
bcwhite
2017/02/14 14:33:01
Done.
| |
25 enum ThreadState { | |
26 THREAD_UNCHECKED, | |
27 THREAD_RUNNING, | |
28 THREAD_EXITED, | |
29 THREAD_UNSUSPENDABLE, | |
30 THREAD_NO_INFO, | |
31 THREAD_STACK_TOO_BIG, | |
32 THREAD_INACCESSIBLE, | |
33 }; | |
34 | |
24 // The callback type used to add annotations to a sample during collection. | 35 // The callback type used to add annotations to a sample during collection. |
25 // This is passed to the native sampler to be applied at the most appropriate | 36 // This is passed to the native sampler to be applied at the most appropriate |
26 // time. It is a simple function-pointer because the generated code must be | 37 // time. It is a simple function-pointer because the generated code must be |
27 // completely predictable and do nothing that could acquire a mutex; a | 38 // completely predictable and do nothing that could acquire a mutex; a |
28 // Callback object is code outside the control of this object and could, | 39 // Callback object is code outside the control of this object and could, |
29 // for example, acquire a mutex as part of allocating memory for a LOG | 40 // for example, acquire a mutex as part of allocating memory for a LOG |
30 // message. | 41 // message. |
31 using AnnotateCallback = void (*)(StackSamplingProfiler::Sample*); | 42 using AnnotateCallback = void (*)(StackSamplingProfiler::Sample*); |
32 | 43 |
33 virtual ~NativeStackSampler(); | 44 virtual ~NativeStackSampler(); |
(...skipping 13 matching lines...) Expand all Loading... | |
47 virtual void ProfileRecordingStarting( | 58 virtual void ProfileRecordingStarting( |
48 std::vector<StackSamplingProfiler::Module>* modules) = 0; | 59 std::vector<StackSamplingProfiler::Module>* modules) = 0; |
49 | 60 |
50 // Records a stack sample to |sample|. | 61 // Records a stack sample to |sample|. |
51 virtual void RecordStackSample(StackSamplingProfiler::Sample* sample) = 0; | 62 virtual void RecordStackSample(StackSamplingProfiler::Sample* sample) = 0; |
52 | 63 |
53 // Notifies the sampler that we've stopped recording the current | 64 // Notifies the sampler that we've stopped recording the current |
54 // profile. | 65 // profile. |
55 virtual void ProfileRecordingStopped() = 0; | 66 virtual void ProfileRecordingStopped() = 0; |
56 | 67 |
68 // Gets the last-known thread state. | |
69 ThreadState thread_state() { return thread_state_; } | |
70 | |
57 protected: | 71 protected: |
58 NativeStackSampler(); | 72 NativeStackSampler(); |
59 | 73 |
74 void set_thread_state(ThreadState state) { thread_state_ = state; } | |
75 | |
60 private: | 76 private: |
77 ThreadState thread_state_ = THREAD_UNCHECKED; | |
78 | |
61 DISALLOW_COPY_AND_ASSIGN(NativeStackSampler); | 79 DISALLOW_COPY_AND_ASSIGN(NativeStackSampler); |
62 }; | 80 }; |
63 | 81 |
64 // NativeStackSamplerTestDelegate provides seams for test code to execute during | 82 // NativeStackSamplerTestDelegate provides seams for test code to execute during |
65 // stack collection. | 83 // stack collection. |
66 class BASE_EXPORT NativeStackSamplerTestDelegate { | 84 class BASE_EXPORT NativeStackSamplerTestDelegate { |
67 public: | 85 public: |
68 virtual ~NativeStackSamplerTestDelegate(); | 86 virtual ~NativeStackSamplerTestDelegate(); |
69 | 87 |
70 // Called after copying the stack and resuming the target thread, but prior to | 88 // Called after copying the stack and resuming the target thread, but prior to |
71 // walking the stack. Invoked on the SamplingThread. | 89 // walking the stack. Invoked on the SamplingThread. |
72 virtual void OnPreStackWalk() = 0; | 90 virtual void OnPreStackWalk(){}; |
91 | |
92 // Called after the sampling is complete. | |
93 virtual void OnPostRecordSample(NativeStackSampler::ThreadState state){}; | |
73 | 94 |
74 protected: | 95 protected: |
75 NativeStackSamplerTestDelegate(); | 96 NativeStackSamplerTestDelegate(); |
76 | 97 |
77 private: | 98 private: |
78 DISALLOW_COPY_AND_ASSIGN(NativeStackSamplerTestDelegate); | 99 DISALLOW_COPY_AND_ASSIGN(NativeStackSamplerTestDelegate); |
79 }; | 100 }; |
80 | 101 |
81 } // namespace base | 102 } // namespace base |
82 | 103 |
83 #endif // BASE_PROFILER_NATIVE_STACK_SAMPLER_H_ | 104 #endif // BASE_PROFILER_NATIVE_STACK_SAMPLER_H_ |
84 | 105 |
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