1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
// APIs that control the lifetime of the profiler: Initialization, start, pause,
// resume, stop, and shutdown.
#ifndef ProfilerControl_h
#define ProfilerControl_h
#include "mozilla/BaseProfilerRAIIMacro.h"
// Everything in here is also safe to include unconditionally, and only defines
// empty macros if MOZ_GECKO_PROFILER is unset.
// If your file only uses particular APIs (e.g., only markers), please consider
// including only the needed headers instead of this one, to reduce compilation
// dependencies.
enum class IsFastShutdown {
No,
Yes,
};
#ifndef MOZ_GECKO_PROFILER
// This file can be #included unconditionally. However, everything within this
// file must be guarded by a #ifdef MOZ_GECKO_PROFILER, *except* for the
// following macros and functions, which encapsulate the most common operations
// and thus avoid the need for many #ifdefs.
# define AUTO_PROFILER_INIT ::profiler_init_main_thread_id()
# define AUTO_PROFILER_INIT2
// Function stubs for when MOZ_GECKO_PROFILER is not defined.
static inline void profiler_init(void* stackTop) {}
static inline void profiler_shutdown(
IsFastShutdown aIsFastShutdown = IsFastShutdown::No) {}
#else // !MOZ_GECKO_PROFILER
# include "BaseProfiler.h"
# include "mozilla/Attributes.h"
# include "mozilla/Maybe.h"
# include "mozilla/MozPromise.h"
# include "mozilla/PowerOfTwo.h"
# include "mozilla/Vector.h"
//---------------------------------------------------------------------------
// Start and stop the profiler
//---------------------------------------------------------------------------
static constexpr mozilla::PowerOfTwo32 PROFILER_DEFAULT_ENTRIES =
mozilla::baseprofiler::BASE_PROFILER_DEFAULT_ENTRIES;
static constexpr mozilla::PowerOfTwo32 PROFILER_DEFAULT_STARTUP_ENTRIES =
mozilla::baseprofiler::BASE_PROFILER_DEFAULT_STARTUP_ENTRIES;
# define PROFILER_DEFAULT_INTERVAL BASE_PROFILER_DEFAULT_INTERVAL
# define PROFILER_MAX_INTERVAL BASE_PROFILER_MAX_INTERVAL
# define PROFILER_DEFAULT_ACTIVE_TAB_ID 0
// Initialize the profiler. If MOZ_PROFILER_STARTUP is set the profiler will
// also be started. This call must happen before any other profiler calls
// (except profiler_start(), which will call profiler_init() if it hasn't
// already run).
void profiler_init(void* stackTop);
void profiler_init_threadmanager();
// Call this as early as possible
# define AUTO_PROFILER_INIT mozilla::AutoProfilerInit PROFILER_RAII
// Call this after the nsThreadManager is Init()ed
# define AUTO_PROFILER_INIT2 mozilla::AutoProfilerInit2 PROFILER_RAII
// Clean up the profiler module, stopping it if required. This function may
// also save a shutdown profile if requested. No profiler calls should happen
// after this point and all profiling stack labels should have been popped.
void profiler_shutdown(IsFastShutdown aIsFastShutdown = IsFastShutdown::No);
// Start the profiler -- initializing it first if necessary -- with the
// selected options. Stops and restarts the profiler if it is already active.
// After starting the profiler is "active". The samples will be recorded in a
// circular buffer.
// "aCapacity" is the maximum number of 8-bytes entries in the profiler's
// circular buffer.
// "aInterval" the sampling interval, measured in millseconds.
// "aFeatures" is the feature set. Features unsupported by this
// platform/configuration are ignored.
// "aFilters" is the list of thread filters. Threads that do not match any
// of the filters are not profiled. A filter matches a thread if
// (a) the thread name contains the filter as a case-insensitive
// substring, or
// (b) the filter is of the form "pid:<n>" where n is the process
// id of the process that the thread is running in.
// "aActiveTabID" BrowserId of the active browser screen's active tab.
// It's being used to determine the profiled tab. It's "0" if
// we failed to get the ID.
// "aDuration" is the duration of entries in the profiler's circular buffer.
// Returns as soon as this process' profiler has started, the returned promise
// gets resolved when profilers in sub-processes (if any) have started.
RefPtr<mozilla::GenericPromise> profiler_start(
mozilla::PowerOfTwo32 aCapacity, double aInterval, uint32_t aFeatures,
const char** aFilters, uint32_t aFilterCount, uint64_t aActiveTabID,
const mozilla::Maybe<double>& aDuration = mozilla::Nothing());
// Stop the profiler and discard the profile without saving it. A no-op if the
// profiler is inactive. After stopping the profiler is "inactive".
// Returns as soon as this process' profiler has stopped, the returned promise
// gets resolved when profilers in sub-processes (if any) have stopped.
RefPtr<mozilla::GenericPromise> profiler_stop();
// If the profiler is inactive, start it. If it's already active, restart it if
// the requested settings differ from the current settings. Both the check and
// the state change are performed while the profiler state is locked.
// The only difference to profiler_start is that the current buffer contents are
// not discarded if the profiler is already running with the requested settings.
void profiler_ensure_started(
mozilla::PowerOfTwo32 aCapacity, double aInterval, uint32_t aFeatures,
const char** aFilters, uint32_t aFilterCount, uint64_t aActiveTabID,
const mozilla::Maybe<double>& aDuration = mozilla::Nothing());
//---------------------------------------------------------------------------
// Control the profiler
//---------------------------------------------------------------------------
// Pause and resume the profiler. No-ops if the profiler is inactive. While
// paused the profile will not take any samples and will not record any data
// into its buffers. The profiler remains fully initialized in this state.
// Timeline markers will still be stored. This feature will keep JavaScript
// profiling enabled, thus allowing toggling the profiler without invalidating
// the JIT.
// Returns as soon as this process' profiler has paused/resumed, the returned
// promise gets resolved when profilers in sub-processes (if any) have
// paused/resumed.
RefPtr<mozilla::GenericPromise> profiler_pause();
RefPtr<mozilla::GenericPromise> profiler_resume();
// Only pause and resume the periodic sampling loop, including stack sampling,
// counters, and profiling overheads.
// Returns as soon as this process' profiler has paused/resumed sampling, the
// returned promise gets resolved when profilers in sub-processes (if any) have
// paused/resumed sampling.
RefPtr<mozilla::GenericPromise> profiler_pause_sampling();
RefPtr<mozilla::GenericPromise> profiler_resume_sampling();
//---------------------------------------------------------------------------
// Get information from the profiler
//---------------------------------------------------------------------------
// Get the params used to start the profiler. Returns 0 and an empty vector
// (via outparams) if the profile is inactive. It's possible that the features
// returned may be slightly different to those requested due to required
// adjustments.
void profiler_get_start_params(
int* aEntrySize, mozilla::Maybe<double>* aDuration, double* aInterval,
uint32_t* aFeatures,
mozilla::Vector<const char*, 0, mozilla::MallocAllocPolicy>* aFilters,
uint64_t* aActiveTabID);
//---------------------------------------------------------------------------
// RAII classes
//---------------------------------------------------------------------------
namespace mozilla {
class MOZ_RAII AutoProfilerInit {
public:
explicit AutoProfilerInit() { profiler_init(this); }
~AutoProfilerInit() { profiler_shutdown(); }
private:
};
class MOZ_RAII AutoProfilerInit2 {
public:
explicit AutoProfilerInit2() { profiler_init_threadmanager(); }
private:
};
} // namespace mozilla
#endif // !MOZ_GECKO_PROFILER
#endif // ProfilerControl_h
|
