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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 CHROME_COMMON_STACK_SAMPLING_CONFIGURATION_H_ | 5 #ifndef CHROME_COMMON_STACK_SAMPLING_CONFIGURATION_H_ |
6 #define CHROME_COMMON_STACK_SAMPLING_CONFIGURATION_H_ | 6 #define CHROME_COMMON_STACK_SAMPLING_CONFIGURATION_H_ |
7 | 7 |
8 #include <string> | |
9 | |
10 #include "base/callback.h" | |
8 #include "base/macros.h" | 11 #include "base/macros.h" |
9 #include "base/profiler/stack_sampling_profiler.h" | 12 #include "base/profiler/stack_sampling_profiler.h" |
10 | 13 |
11 // Chooses a configuration for the stack sampling profiler for browser process | 14 namespace base { |
12 // startup. This must live outside of ChromeBrowserMainParts so it can be | 15 class CommandLine; |
13 // friended by ChromeMetricsServiceAccessor. | 16 } // namespace base |
17 | |
18 // StackSamplingConfiguration chooses a configuration for the enable state of | |
19 // the stack sampling profiler across all processes. This configuration is | |
20 // determined once at browser process startup. Configurations for child | |
21 // processes are communicated via command line arguments. | |
14 class StackSamplingConfiguration { | 22 class StackSamplingConfiguration { |
15 public: | 23 public: |
16 // This callback indirection is required to avoid a DEPS on | 24 // This callback indirection is required to avoid a DEPS on |
17 // chrome/browser/metrics. | 25 // chrome/browser/metrics. |
18 using RegisterSyntheticFieldTrialFunction = base::Callback<bool( | 26 using RegisterSyntheticFieldTrialFunction = base::Callback<bool( |
19 const std::string& trial_name, | 27 const std::string& trial_name, |
20 const std::string& group_name)>; | 28 const std::string& group_name)>; |
29 | |
21 StackSamplingConfiguration(); | 30 StackSamplingConfiguration(); |
22 | 31 |
23 // Get the stack sampling params to use for this session. | 32 // Get the stack sampling params to use for this process. |
24 base::StackSamplingProfiler::SamplingParams GetSamplingParams() const; | 33 base::StackSamplingProfiler::SamplingParams |
34 GetSamplingParamsForCurrentProcess() const; | |
25 | 35 |
26 // Returns true if the profiler should be started at all. | 36 // Returns true if the profiler should be started for the current process. |
27 bool IsProfilerEnabled() const; | 37 bool IsProfilerEnabledForCurrentProcess() const; |
28 | 38 |
29 // Register the chosen configuration as a synthetic field trial. | 39 // Register the chosen configuration as a synthetic field trial. This should |
40 // only be called from the browser process. | |
30 void RegisterSyntheticFieldTrial( | 41 void RegisterSyntheticFieldTrial( |
31 const RegisterSyntheticFieldTrialFunction& register_field_trial) const; | 42 const RegisterSyntheticFieldTrialFunction& register_field_trial) const; |
32 | 43 |
44 // Add a command line switch that instructs the child process to run the | |
45 // profiler. This should only be called from the browser process. | |
46 void AppendCommandLineSwitchForChildProcess( | |
47 const std::string process_type, | |
Ilya Sherman
2016/09/28 01:02:15
nit: Did you mean to pass by const-reference? We
Mike Wittman
2016/09/28 19:34:26
Oops, yes that was the intent. Done.
| |
48 base::CommandLine* command_line) const; | |
49 | |
50 // Returns the StackSamplingConfiguration for the process. | |
51 static StackSamplingConfiguration* Get(); | |
52 | |
33 private: | 53 private: |
34 enum ProfileConfiguration { | 54 enum ProfileConfiguration { |
55 // Chrome-wide configurations set in the browser process. | |
35 PROFILE_DISABLED, | 56 PROFILE_DISABLED, |
36 PROFILE_CONTROL, | 57 PROFILE_CONTROL, |
37 PROFILE_NO_SAMPLES, // Run the profiler thread, but don't collect profiles. | 58 PROFILE_BROWSER_PROCESS, |
38 PROFILE_5HZ, | 59 PROFILE_GPU_PROCESS, |
39 PROFILE_10HZ, | 60 PROFILE_BROWSER_AND_GPU_PROCESS, |
40 PROFILE_100HZ | 61 |
62 // Configuration set in the child processes, which receive their enable | |
63 // state on the command line from the browser process. | |
64 PROFILE_FROM_COMMAND_LINE | |
41 }; | 65 }; |
42 | 66 |
67 // Generates sampling profiler configurations for all processes. | |
43 static ProfileConfiguration GenerateConfiguration(); | 68 static ProfileConfiguration GenerateConfiguration(); |
44 | 69 |
70 // In the browser process this represents the configuration to use across all | |
71 // Chrome processes. In the child processes it is alwasys | |
72 // PROFILE_FROM_COMMAND_LINE. | |
45 const ProfileConfiguration configuration_; | 73 const ProfileConfiguration configuration_; |
46 | 74 |
47 DISALLOW_COPY_AND_ASSIGN(StackSamplingConfiguration); | 75 DISALLOW_COPY_AND_ASSIGN(StackSamplingConfiguration); |
48 }; | 76 }; |
49 | 77 |
50 #endif // CHROME_COMMON_STACK_SAMPLING_CONFIGURATION_H_ | 78 #endif // CHROME_COMMON_STACK_SAMPLING_CONFIGURATION_H_ |
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