1
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2
// Use of this source code is governed by a BSD-style license that can be
3
// found in the LICENSE file.
5
// This header file defines the set of trace_event macros without specifying
6
// how the events actually get collected and stored. If you need to expose trace
7
// events to some other universe, you can copy-and-paste this file as well as
8
// trace_event.h, modifying the macros contained there as necessary for the
9
// target platform. The end result is that multiple libraries can funnel events
10
// through to a shared trace event collector.
12
// Trace events are for tracking application performance and resource usage.
13
// Macros are provided to track:
14
// Begin and end of function calls
17
// Events are issued against categories. Whereas LOG's
18
// categories are statically defined, TRACE categories are created
19
// implicitly with a string. For example:
20
// TRACE_EVENT_INSTANT0("MY_SUBSYSTEM", "SomeImportantEvent",
21
// TRACE_EVENT_SCOPE_THREAD)
23
// It is often the case that one trace may belong in multiple categories at the
24
// same time. The first argument to the trace can be a comma-separated list of
25
// categories, forming a category group, like:
27
// TRACE_EVENT_INSTANT0("input,views", "OnMouseOver", TRACE_EVENT_SCOPE_THREAD)
29
// We can enable/disable tracing of OnMouseOver by enabling/disabling either
32
// Events can be INSTANT, or can be pairs of BEGIN and END in the same scope:
33
// TRACE_EVENT_BEGIN0("MY_SUBSYSTEM", "SomethingCostly")
34
// doSomethingCostly()
35
// TRACE_EVENT_END0("MY_SUBSYSTEM", "SomethingCostly")
36
// Note: our tools can't always determine the correct BEGIN/END pairs unless
37
// these are used in the same scope. Use ASYNC_BEGIN/ASYNC_END macros if you
38
// need them to be in separate scopes.
40
// A common use case is to trace entire function scopes. This
41
// issues a trace BEGIN and END automatically:
42
// void doSomethingCostly() {
43
// TRACE_EVENT0("MY_SUBSYSTEM", "doSomethingCostly");
47
// Additional parameters can be associated with an event:
48
// void doSomethingCostly2(int howMuch) {
49
// TRACE_EVENT1("MY_SUBSYSTEM", "doSomethingCostly",
50
// "howMuch", howMuch);
54
// The trace system will automatically add to this information the
55
// current process id, thread id, and a timestamp in microseconds.
57
// To trace an asynchronous procedure such as an IPC send/receive, use
58
// ASYNC_BEGIN and ASYNC_END:
59
// [single threaded sender code]
60
// static int send_count = 0;
62
// TRACE_EVENT_ASYNC_BEGIN0("ipc", "message", send_count);
63
// Send(new MyMessage(send_count));
65
// void OnMyMessage(send_count) {
66
// TRACE_EVENT_ASYNC_END0("ipc", "message", send_count);
68
// The third parameter is a unique ID to match ASYNC_BEGIN/ASYNC_END pairs.
69
// ASYNC_BEGIN and ASYNC_END can occur on any thread of any traced process.
70
// Pointers can be used for the ID parameter, and they will be mangled
71
// internally so that the same pointer on two different processes will not
72
// match. For example:
73
// class MyTracedClass {
76
// TRACE_EVENT_ASYNC_BEGIN0("category", "MyTracedClass", this);
79
// TRACE_EVENT_ASYNC_END0("category", "MyTracedClass", this);
83
// Trace event also supports counters, which is a way to track a quantity
84
// as it varies over time. Counters are created with the following macro:
85
// TRACE_COUNTER1("MY_SUBSYSTEM", "myCounter", g_myCounterValue);
87
// Counters are process-specific. The macro itself can be issued from any
90
// Sometimes, you want to track two counters at once. You can do this with two
92
// TRACE_COUNTER1("MY_SUBSYSTEM", "myCounter0", g_myCounterValue[0]);
93
// TRACE_COUNTER1("MY_SUBSYSTEM", "myCounter1", g_myCounterValue[1]);
94
// Or you can do it with a combined macro:
95
// TRACE_COUNTER2("MY_SUBSYSTEM", "myCounter",
96
// "bytesPinned", g_myCounterValue[0],
97
// "bytesAllocated", g_myCounterValue[1]);
98
// This indicates to the tracing UI that these counters should be displayed
99
// in a single graph, as a summed area chart.
101
// Since counters are in a global namespace, you may want to disambiguate with a
102
// unique ID, by using the TRACE_COUNTER_ID* variations.
104
// By default, trace collection is compiled in, but turned off at runtime.
105
// Collecting trace data is the responsibility of the embedding
106
// application. In Chrome's case, navigating to about:tracing will turn on
107
// tracing and display data collected across all active processes.
110
// Memory scoping note:
111
// Tracing copies the pointers, not the string content, of the strings passed
112
// in for category_group, name, and arg_names. Thus, the following code will
114
// char* str = strdup("importantName");
115
// TRACE_EVENT_INSTANT0("SUBSYSTEM", str); // BAD!
116
// free(str); // Trace system now has dangling pointer
118
// To avoid this issue with the |name| and |arg_name| parameters, use the
119
// TRACE_EVENT_COPY_XXX overloads of the macros at additional runtime overhead.
120
// Notes: The category must always be in a long-lived char* (i.e. static const).
121
// The |arg_values|, when used, are always deep copied with the _COPY
124
// When are string argument values copied:
125
// const char* arg_values are only referenced by default:
126
// TRACE_EVENT1("category", "name",
127
// "arg1", "literal string is only referenced");
128
// Use TRACE_STR_COPY to force copying of a const char*:
129
// TRACE_EVENT1("category", "name",
130
// "arg1", TRACE_STR_COPY("string will be copied"));
131
// std::string arg_values are always copied:
132
// TRACE_EVENT1("category", "name",
133
// "arg1", std::string("string will be copied"));
136
// Convertable notes:
137
// Converting a large data type to a string can be costly. To help with this,
138
// the trace framework provides an interface ConvertableToTraceFormat. If you
139
// inherit from it and implement the AppendAsTraceFormat method the trace
140
// framework will call back to your object to convert a trace output time. This
141
// means, if the category for the event is disabled, the conversion will not
144
// class MyData : public base::debug::ConvertableToTraceFormat {
147
// virtual void AppendAsTraceFormat(std::string* out) const OVERRIDE {
148
// out->append("{\"foo\":1}");
151
// virtual ~MyData() {}
152
// DISALLOW_COPY_AND_ASSIGN(MyData);
155
// TRACE_EVENT1("foo", "bar", "data",
156
// scoped_refptr<ConvertableToTraceFormat>(new MyData()));
158
// The trace framework will take ownership if the passed pointer and it will
159
// be free'd when the trace buffer is flushed.
161
// Note, we only do the conversion when the buffer is flushed, so the provided
162
// data object should not be modified after it's passed to the trace framework.
166
// A thread safe singleton and mutex are used for thread safety. Category
167
// enabled flags are used to limit the performance impact when the system
170
// TRACE_EVENT macros first cache a pointer to a category. The categories are
171
// statically allocated and safe at all times, even after exit. Fetching a
172
// category is protected by the TraceLog::lock_. Multiple threads initializing
173
// the static variable is safe, as they will be serialized by the lock and
174
// multiple calls will return the same pointer to the category.
176
// Then the category_group_enabled flag is checked. This is a unsigned char, and
177
// not intended to be multithread safe. It optimizes access to AddTraceEvent
178
// which is threadsafe internally via TraceLog::lock_. The enabled flag may
179
// cause some threads to incorrectly call or skip calling AddTraceEvent near
180
// the time of the system being enabled or disabled. This is acceptable as
181
// we tolerate some data loss while the system is being enabled/disabled and
182
// because AddTraceEvent is threadsafe internally and checks the enabled state
185
// Without the use of these static category pointers and enabled flags all
186
// trace points would carry a significant performance cost of acquiring a lock
187
// and resolving the category.
189
#ifndef BASE_DEBUG_TRACE_EVENT_H_
190
#define BASE_DEBUG_TRACE_EVENT_H_
194
#include "base/atomicops.h"
195
#include "base/debug/trace_event_impl.h"
196
#include "base/debug/trace_event_memory.h"
197
#include "base/debug/trace_event_system_stats_monitor.h"
198
#include "build/build_config.h"
200
// By default, const char* argument values are assumed to have long-lived scope
201
// and will not be copied. Use this macro to force a const char* to be copied.
202
#define TRACE_STR_COPY(str) \
203
trace_event_internal::TraceStringWithCopy(str)
205
// This will mark the trace event as disabled by default. The user will need
206
// to explicitly enable the event.
207
#define TRACE_DISABLED_BY_DEFAULT(name) "disabled-by-default-" name
209
// By default, uint64 ID argument values are not mangled with the Process ID in
210
// TRACE_EVENT_ASYNC macros. Use this macro to force Process ID mangling.
211
#define TRACE_ID_MANGLE(id) \
212
trace_event_internal::TraceID::ForceMangle(id)
214
// By default, pointers are mangled with the Process ID in TRACE_EVENT_ASYNC
215
// macros. Use this macro to prevent Process ID mangling.
216
#define TRACE_ID_DONT_MANGLE(id) \
217
trace_event_internal::TraceID::DontMangle(id)
219
// Records a pair of begin and end events called "name" for the current
220
// scope, with 0, 1 or 2 associated arguments. If the category is not
221
// enabled, then this does nothing.
222
// - category and name strings must have application lifetime (statics or
223
// literals). They may not include " chars.
224
#define TRACE_EVENT0(category_group, name) \
225
INTERNAL_TRACE_MEMORY(category_group, name) \
226
INTERNAL_TRACE_EVENT_ADD_SCOPED(category_group, name)
227
#define TRACE_EVENT1(category_group, name, arg1_name, arg1_val) \
228
INTERNAL_TRACE_MEMORY(category_group, name) \
229
INTERNAL_TRACE_EVENT_ADD_SCOPED(category_group, name, arg1_name, arg1_val)
230
#define TRACE_EVENT2( \
231
category_group, name, arg1_name, arg1_val, arg2_name, arg2_val) \
232
INTERNAL_TRACE_MEMORY(category_group, name) \
233
INTERNAL_TRACE_EVENT_ADD_SCOPED( \
234
category_group, name, arg1_name, arg1_val, arg2_name, arg2_val)
236
// Records events like TRACE_EVENT2 but uses |memory_tag| for memory tracing.
237
// Use this where |name| is too generic to accurately aggregate allocations.
238
#define TRACE_EVENT_WITH_MEMORY_TAG2( \
239
category, name, memory_tag, arg1_name, arg1_val, arg2_name, arg2_val) \
240
INTERNAL_TRACE_MEMORY(category, memory_tag) \
241
INTERNAL_TRACE_EVENT_ADD_SCOPED( \
242
category, name, arg1_name, arg1_val, arg2_name, arg2_val)
244
// UNSHIPPED_TRACE_EVENT* are like TRACE_EVENT* except that they are not
245
// included in official builds.
248
#undef TRACING_IS_OFFICIAL_BUILD
249
#define TRACING_IS_OFFICIAL_BUILD 1
250
#elif !defined(TRACING_IS_OFFICIAL_BUILD)
251
#define TRACING_IS_OFFICIAL_BUILD 0
254
#if TRACING_IS_OFFICIAL_BUILD
255
#define UNSHIPPED_TRACE_EVENT0(category_group, name) (void)0
256
#define UNSHIPPED_TRACE_EVENT1(category_group, name, arg1_name, arg1_val) \
258
#define UNSHIPPED_TRACE_EVENT2(category_group, name, arg1_name, arg1_val, \
259
arg2_name, arg2_val) (void)0
260
#define UNSHIPPED_TRACE_EVENT_INSTANT0(category_group, name, scope) (void)0
261
#define UNSHIPPED_TRACE_EVENT_INSTANT1(category_group, name, scope, \
262
arg1_name, arg1_val) (void)0
263
#define UNSHIPPED_TRACE_EVENT_INSTANT2(category_group, name, scope, \
264
arg1_name, arg1_val, \
265
arg2_name, arg2_val) (void)0
267
#define UNSHIPPED_TRACE_EVENT0(category_group, name) \
268
TRACE_EVENT0(category_group, name)
269
#define UNSHIPPED_TRACE_EVENT1(category_group, name, arg1_name, arg1_val) \
270
TRACE_EVENT1(category_group, name, arg1_name, arg1_val)
271
#define UNSHIPPED_TRACE_EVENT2(category_group, name, arg1_name, arg1_val, \
272
arg2_name, arg2_val) \
273
TRACE_EVENT2(category_group, name, arg1_name, arg1_val, arg2_name, arg2_val)
274
#define UNSHIPPED_TRACE_EVENT_INSTANT0(category_group, name, scope) \
275
TRACE_EVENT_INSTANT0(category_group, name, scope)
276
#define UNSHIPPED_TRACE_EVENT_INSTANT1(category_group, name, scope, \
277
arg1_name, arg1_val) \
278
TRACE_EVENT_INSTANT1(category_group, name, scope, arg1_name, arg1_val)
279
#define UNSHIPPED_TRACE_EVENT_INSTANT2(category_group, name, scope, \
280
arg1_name, arg1_val, \
281
arg2_name, arg2_val) \
282
TRACE_EVENT_INSTANT2(category_group, name, scope, arg1_name, arg1_val, \
286
// Records a single event called "name" immediately, with 0, 1 or 2
287
// associated arguments. If the category is not enabled, then this
289
// - category and name strings must have application lifetime (statics or
290
// literals). They may not include " chars.
291
#define TRACE_EVENT_INSTANT0(category_group, name, scope) \
292
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, \
293
category_group, name, TRACE_EVENT_FLAG_NONE | scope)
294
#define TRACE_EVENT_INSTANT1(category_group, name, scope, arg1_name, arg1_val) \
295
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, \
296
category_group, name, TRACE_EVENT_FLAG_NONE | scope, \
298
#define TRACE_EVENT_INSTANT2(category_group, name, scope, arg1_name, arg1_val, \
299
arg2_name, arg2_val) \
300
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, \
301
category_group, name, TRACE_EVENT_FLAG_NONE | scope, \
302
arg1_name, arg1_val, arg2_name, arg2_val)
303
#define TRACE_EVENT_COPY_INSTANT0(category_group, name, scope) \
304
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, \
305
category_group, name, TRACE_EVENT_FLAG_COPY | scope)
306
#define TRACE_EVENT_COPY_INSTANT1(category_group, name, scope, \
307
arg1_name, arg1_val) \
308
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, \
309
category_group, name, TRACE_EVENT_FLAG_COPY | scope, arg1_name, \
311
#define TRACE_EVENT_COPY_INSTANT2(category_group, name, scope, \
312
arg1_name, arg1_val, \
313
arg2_name, arg2_val) \
314
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_INSTANT, \
315
category_group, name, TRACE_EVENT_FLAG_COPY | scope, \
316
arg1_name, arg1_val, arg2_name, arg2_val)
318
// Sets the current sample state to the given category and name (both must be
319
// constant strings). These states are intended for a sampling profiler.
320
// Implementation note: we store category and name together because we don't
321
// want the inconsistency/expense of storing two pointers.
322
// |thread_bucket| is [0..2] and is used to statically isolate samples in one
323
// thread from others.
324
#define TRACE_EVENT_SET_SAMPLING_STATE_FOR_BUCKET( \
325
bucket_number, category, name) \
326
trace_event_internal:: \
327
TraceEventSamplingStateScope<bucket_number>::Set(category "\0" name)
329
// Returns a current sampling state of the given bucket.
330
#define TRACE_EVENT_GET_SAMPLING_STATE_FOR_BUCKET(bucket_number) \
331
trace_event_internal::TraceEventSamplingStateScope<bucket_number>::Current()
333
// Creates a scope of a sampling state of the given bucket.
335
// { // The sampling state is set within this scope.
336
// TRACE_EVENT_SAMPLING_STATE_SCOPE_FOR_BUCKET(0, "category", "name");
339
#define TRACE_EVENT_SCOPED_SAMPLING_STATE_FOR_BUCKET( \
340
bucket_number, category, name) \
341
trace_event_internal::TraceEventSamplingStateScope<bucket_number> \
342
traceEventSamplingScope(category "\0" name);
344
// Syntactic sugars for the sampling tracing in the main thread.
345
#define TRACE_EVENT_SCOPED_SAMPLING_STATE(category, name) \
346
TRACE_EVENT_SCOPED_SAMPLING_STATE_FOR_BUCKET(0, category, name)
347
#define TRACE_EVENT_GET_SAMPLING_STATE() \
348
TRACE_EVENT_GET_SAMPLING_STATE_FOR_BUCKET(0)
349
#define TRACE_EVENT_SET_SAMPLING_STATE(category, name) \
350
TRACE_EVENT_SET_SAMPLING_STATE_FOR_BUCKET(0, category, name)
353
// Records a single BEGIN event called "name" immediately, with 0, 1 or 2
354
// associated arguments. If the category is not enabled, then this
356
// - category and name strings must have application lifetime (statics or
357
// literals). They may not include " chars.
358
#define TRACE_EVENT_BEGIN0(category_group, name) \
359
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_BEGIN, \
360
category_group, name, TRACE_EVENT_FLAG_NONE)
361
#define TRACE_EVENT_BEGIN1(category_group, name, arg1_name, arg1_val) \
362
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_BEGIN, \
363
category_group, name, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
364
#define TRACE_EVENT_BEGIN2(category_group, name, arg1_name, arg1_val, \
365
arg2_name, arg2_val) \
366
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_BEGIN, \
367
category_group, name, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val, \
369
#define TRACE_EVENT_COPY_BEGIN0(category_group, name) \
370
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_BEGIN, \
371
category_group, name, TRACE_EVENT_FLAG_COPY)
372
#define TRACE_EVENT_COPY_BEGIN1(category_group, name, arg1_name, arg1_val) \
373
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_BEGIN, \
374
category_group, name, TRACE_EVENT_FLAG_COPY, arg1_name, arg1_val)
375
#define TRACE_EVENT_COPY_BEGIN2(category_group, name, arg1_name, arg1_val, \
376
arg2_name, arg2_val) \
377
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_BEGIN, \
378
category_group, name, TRACE_EVENT_FLAG_COPY, arg1_name, arg1_val, \
381
// Similar to TRACE_EVENT_BEGINx but with a custom |at| timestamp provided.
382
// - |id| is used to match the _BEGIN event with the _END event.
383
// Events are considered to match if their category_group, name and id values
384
// all match. |id| must either be a pointer or an integer value up to 64 bits.
385
// If it's a pointer, the bits will be xored with a hash of the process ID so
386
// that the same pointer on two different processes will not collide.
387
#define TRACE_EVENT_BEGIN_WITH_ID_TID_AND_TIMESTAMP0(category_group, \
388
name, id, thread_id, timestamp) \
389
INTERNAL_TRACE_EVENT_ADD_WITH_ID_TID_AND_TIMESTAMP( \
390
TRACE_EVENT_PHASE_ASYNC_BEGIN, category_group, name, id, thread_id, \
391
timestamp, TRACE_EVENT_FLAG_NONE)
392
#define TRACE_EVENT_COPY_BEGIN_WITH_ID_TID_AND_TIMESTAMP0( \
393
category_group, name, id, thread_id, timestamp) \
394
INTERNAL_TRACE_EVENT_ADD_WITH_ID_TID_AND_TIMESTAMP( \
395
TRACE_EVENT_PHASE_ASYNC_BEGIN, category_group, name, id, thread_id, \
396
timestamp, TRACE_EVENT_FLAG_COPY)
398
// Records a single END event for "name" immediately. If the category
399
// is not enabled, then this does nothing.
400
// - category and name strings must have application lifetime (statics or
401
// literals). They may not include " chars.
402
#define TRACE_EVENT_END0(category_group, name) \
403
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_END, \
404
category_group, name, TRACE_EVENT_FLAG_NONE)
405
#define TRACE_EVENT_END1(category_group, name, arg1_name, arg1_val) \
406
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_END, \
407
category_group, name, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
408
#define TRACE_EVENT_END2(category_group, name, arg1_name, arg1_val, \
409
arg2_name, arg2_val) \
410
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_END, \
411
category_group, name, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val, \
413
#define TRACE_EVENT_COPY_END0(category_group, name) \
414
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_END, \
415
category_group, name, TRACE_EVENT_FLAG_COPY)
416
#define TRACE_EVENT_COPY_END1(category_group, name, arg1_name, arg1_val) \
417
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_END, \
418
category_group, name, TRACE_EVENT_FLAG_COPY, arg1_name, arg1_val)
419
#define TRACE_EVENT_COPY_END2(category_group, name, arg1_name, arg1_val, \
420
arg2_name, arg2_val) \
421
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_END, \
422
category_group, name, TRACE_EVENT_FLAG_COPY, arg1_name, arg1_val, \
425
// Similar to TRACE_EVENT_ENDx but with a custom |at| timestamp provided.
426
// - |id| is used to match the _BEGIN event with the _END event.
427
// Events are considered to match if their category_group, name and id values
428
// all match. |id| must either be a pointer or an integer value up to 64 bits.
429
// If it's a pointer, the bits will be xored with a hash of the process ID so
430
// that the same pointer on two different processes will not collide.
431
#define TRACE_EVENT_END_WITH_ID_TID_AND_TIMESTAMP0(category_group, \
432
name, id, thread_id, timestamp) \
433
INTERNAL_TRACE_EVENT_ADD_WITH_ID_TID_AND_TIMESTAMP( \
434
TRACE_EVENT_PHASE_ASYNC_END, category_group, name, id, thread_id, \
435
timestamp, TRACE_EVENT_FLAG_NONE)
436
#define TRACE_EVENT_COPY_END_WITH_ID_TID_AND_TIMESTAMP0( \
437
category_group, name, id, thread_id, timestamp) \
438
INTERNAL_TRACE_EVENT_ADD_WITH_ID_TID_AND_TIMESTAMP( \
439
TRACE_EVENT_PHASE_ASYNC_END, category_group, name, id, thread_id, \
440
timestamp, TRACE_EVENT_FLAG_COPY)
442
// Records the value of a counter called "name" immediately. Value
443
// must be representable as a 32 bit integer.
444
// - category and name strings must have application lifetime (statics or
445
// literals). They may not include " chars.
446
#define TRACE_COUNTER1(category_group, name, value) \
447
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_COUNTER, \
448
category_group, name, TRACE_EVENT_FLAG_NONE, \
449
"value", static_cast<int>(value))
450
#define TRACE_COPY_COUNTER1(category_group, name, value) \
451
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_COUNTER, \
452
category_group, name, TRACE_EVENT_FLAG_COPY, \
453
"value", static_cast<int>(value))
455
// Records the values of a multi-parted counter called "name" immediately.
456
// The UI will treat value1 and value2 as parts of a whole, displaying their
457
// values as a stacked-bar chart.
458
// - category and name strings must have application lifetime (statics or
459
// literals). They may not include " chars.
460
#define TRACE_COUNTER2(category_group, name, value1_name, value1_val, \
461
value2_name, value2_val) \
462
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_COUNTER, \
463
category_group, name, TRACE_EVENT_FLAG_NONE, \
464
value1_name, static_cast<int>(value1_val), \
465
value2_name, static_cast<int>(value2_val))
466
#define TRACE_COPY_COUNTER2(category_group, name, value1_name, value1_val, \
467
value2_name, value2_val) \
468
INTERNAL_TRACE_EVENT_ADD(TRACE_EVENT_PHASE_COUNTER, \
469
category_group, name, TRACE_EVENT_FLAG_COPY, \
470
value1_name, static_cast<int>(value1_val), \
471
value2_name, static_cast<int>(value2_val))
473
// Records the value of a counter called "name" immediately. Value
474
// must be representable as a 32 bit integer.
475
// - category and name strings must have application lifetime (statics or
476
// literals). They may not include " chars.
477
// - |id| is used to disambiguate counters with the same name. It must either
478
// be a pointer or an integer value up to 64 bits. If it's a pointer, the bits
479
// will be xored with a hash of the process ID so that the same pointer on
480
// two different processes will not collide.
481
#define TRACE_COUNTER_ID1(category_group, name, id, value) \
482
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_COUNTER, \
483
category_group, name, id, TRACE_EVENT_FLAG_NONE, \
484
"value", static_cast<int>(value))
485
#define TRACE_COPY_COUNTER_ID1(category_group, name, id, value) \
486
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_COUNTER, \
487
category_group, name, id, TRACE_EVENT_FLAG_COPY, \
488
"value", static_cast<int>(value))
490
// Records the values of a multi-parted counter called "name" immediately.
491
// The UI will treat value1 and value2 as parts of a whole, displaying their
492
// values as a stacked-bar chart.
493
// - category and name strings must have application lifetime (statics or
494
// literals). They may not include " chars.
495
// - |id| is used to disambiguate counters with the same name. It must either
496
// be a pointer or an integer value up to 64 bits. If it's a pointer, the bits
497
// will be xored with a hash of the process ID so that the same pointer on
498
// two different processes will not collide.
499
#define TRACE_COUNTER_ID2(category_group, name, id, value1_name, value1_val, \
500
value2_name, value2_val) \
501
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_COUNTER, \
502
category_group, name, id, TRACE_EVENT_FLAG_NONE, \
503
value1_name, static_cast<int>(value1_val), \
504
value2_name, static_cast<int>(value2_val))
505
#define TRACE_COPY_COUNTER_ID2(category_group, name, id, value1_name, \
506
value1_val, value2_name, value2_val) \
507
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_COUNTER, \
508
category_group, name, id, TRACE_EVENT_FLAG_COPY, \
509
value1_name, static_cast<int>(value1_val), \
510
value2_name, static_cast<int>(value2_val))
513
// Records a single ASYNC_BEGIN event called "name" immediately, with 0, 1 or 2
514
// associated arguments. If the category is not enabled, then this
516
// - category and name strings must have application lifetime (statics or
517
// literals). They may not include " chars.
518
// - |id| is used to match the ASYNC_BEGIN event with the ASYNC_END event. ASYNC
519
// events are considered to match if their category_group, name and id values
520
// all match. |id| must either be a pointer or an integer value up to 64 bits.
521
// If it's a pointer, the bits will be xored with a hash of the process ID so
522
// that the same pointer on two different processes will not collide.
524
// An asynchronous operation can consist of multiple phases. The first phase is
525
// defined by the ASYNC_BEGIN calls. Additional phases can be defined using the
526
// ASYNC_STEP_INTO or ASYNC_STEP_PAST macros. The ASYNC_STEP_INTO macro will
527
// annotate the block following the call. The ASYNC_STEP_PAST macro will
528
// annotate the block prior to the call. Note that any particular event must use
529
// only STEP_INTO or STEP_PAST macros; they can not mix and match. When the
530
// operation completes, call ASYNC_END.
532
// An ASYNC trace typically occurs on a single thread (if not, they will only be
533
// drawn on the thread defined in the ASYNC_BEGIN event), but all events in that
534
// operation must use the same |name| and |id|. Each step can have its own
536
#define TRACE_EVENT_ASYNC_BEGIN0(category_group, name, id) \
537
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, \
538
category_group, name, id, TRACE_EVENT_FLAG_NONE)
539
#define TRACE_EVENT_ASYNC_BEGIN1(category_group, name, id, arg1_name, \
541
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, \
542
category_group, name, id, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
543
#define TRACE_EVENT_ASYNC_BEGIN2(category_group, name, id, arg1_name, \
544
arg1_val, arg2_name, arg2_val) \
545
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, \
546
category_group, name, id, TRACE_EVENT_FLAG_NONE, \
547
arg1_name, arg1_val, arg2_name, arg2_val)
548
#define TRACE_EVENT_COPY_ASYNC_BEGIN0(category_group, name, id) \
549
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, \
550
category_group, name, id, TRACE_EVENT_FLAG_COPY)
551
#define TRACE_EVENT_COPY_ASYNC_BEGIN1(category_group, name, id, arg1_name, \
553
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, \
554
category_group, name, id, TRACE_EVENT_FLAG_COPY, \
556
#define TRACE_EVENT_COPY_ASYNC_BEGIN2(category_group, name, id, arg1_name, \
557
arg1_val, arg2_name, arg2_val) \
558
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_BEGIN, \
559
category_group, name, id, TRACE_EVENT_FLAG_COPY, \
560
arg1_name, arg1_val, arg2_name, arg2_val)
562
// Records a single ASYNC_STEP_INTO event for |step| immediately. If the
563
// category is not enabled, then this does nothing. The |name| and |id| must
564
// match the ASYNC_BEGIN event above. The |step| param identifies this step
565
// within the async event. This should be called at the beginning of the next
566
// phase of an asynchronous operation. The ASYNC_BEGIN event must not have any
567
// ASYNC_STEP_PAST events.
568
#define TRACE_EVENT_ASYNC_STEP_INTO0(category_group, name, id, step) \
569
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_STEP_INTO, \
570
category_group, name, id, TRACE_EVENT_FLAG_NONE, "step", step)
571
#define TRACE_EVENT_ASYNC_STEP_INTO1(category_group, name, id, step, \
572
arg1_name, arg1_val) \
573
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_STEP_INTO, \
574
category_group, name, id, TRACE_EVENT_FLAG_NONE, "step", step, \
577
// Records a single ASYNC_STEP_PAST event for |step| immediately. If the
578
// category is not enabled, then this does nothing. The |name| and |id| must
579
// match the ASYNC_BEGIN event above. The |step| param identifies this step
580
// within the async event. This should be called at the beginning of the next
581
// phase of an asynchronous operation. The ASYNC_BEGIN event must not have any
582
// ASYNC_STEP_INTO events.
583
#define TRACE_EVENT_ASYNC_STEP_PAST0(category_group, name, id, step) \
584
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_STEP_PAST, \
585
category_group, name, id, TRACE_EVENT_FLAG_NONE, "step", step)
586
#define TRACE_EVENT_ASYNC_STEP_PAST1(category_group, name, id, step, \
587
arg1_name, arg1_val) \
588
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_STEP_PAST, \
589
category_group, name, id, TRACE_EVENT_FLAG_NONE, "step", step, \
592
// Records a single ASYNC_END event for "name" immediately. If the category
593
// is not enabled, then this does nothing.
594
#define TRACE_EVENT_ASYNC_END0(category_group, name, id) \
595
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \
596
category_group, name, id, TRACE_EVENT_FLAG_NONE)
597
#define TRACE_EVENT_ASYNC_END1(category_group, name, id, arg1_name, arg1_val) \
598
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \
599
category_group, name, id, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
600
#define TRACE_EVENT_ASYNC_END2(category_group, name, id, arg1_name, arg1_val, \
601
arg2_name, arg2_val) \
602
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \
603
category_group, name, id, TRACE_EVENT_FLAG_NONE, \
604
arg1_name, arg1_val, arg2_name, arg2_val)
605
#define TRACE_EVENT_COPY_ASYNC_END0(category_group, name, id) \
606
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \
607
category_group, name, id, TRACE_EVENT_FLAG_COPY)
608
#define TRACE_EVENT_COPY_ASYNC_END1(category_group, name, id, arg1_name, \
610
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \
611
category_group, name, id, TRACE_EVENT_FLAG_COPY, \
613
#define TRACE_EVENT_COPY_ASYNC_END2(category_group, name, id, arg1_name, \
614
arg1_val, arg2_name, arg2_val) \
615
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_ASYNC_END, \
616
category_group, name, id, TRACE_EVENT_FLAG_COPY, \
617
arg1_name, arg1_val, arg2_name, arg2_val)
620
// Records a single FLOW_BEGIN event called "name" immediately, with 0, 1 or 2
621
// associated arguments. If the category is not enabled, then this
623
// - category and name strings must have application lifetime (statics or
624
// literals). They may not include " chars.
625
// - |id| is used to match the FLOW_BEGIN event with the FLOW_END event. FLOW
626
// events are considered to match if their category_group, name and id values
627
// all match. |id| must either be a pointer or an integer value up to 64 bits.
628
// If it's a pointer, the bits will be xored with a hash of the process ID so
629
// that the same pointer on two different processes will not collide.
630
// FLOW events are different from ASYNC events in how they are drawn by the
631
// tracing UI. A FLOW defines asynchronous data flow, such as posting a task
632
// (FLOW_BEGIN) and later executing that task (FLOW_END). Expect FLOWs to be
633
// drawn as lines or arrows from FLOW_BEGIN scopes to FLOW_END scopes. Similar
634
// to ASYNC, a FLOW can consist of multiple phases. The first phase is defined
635
// by the FLOW_BEGIN calls. Additional phases can be defined using the FLOW_STEP
636
// macros. When the operation completes, call FLOW_END. An async operation can
637
// span threads and processes, but all events in that operation must use the
638
// same |name| and |id|. Each event can have its own args.
639
#define TRACE_EVENT_FLOW_BEGIN0(category_group, name, id) \
640
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_BEGIN, \
641
category_group, name, id, TRACE_EVENT_FLAG_NONE)
642
#define TRACE_EVENT_FLOW_BEGIN1(category_group, name, id, arg1_name, arg1_val) \
643
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_BEGIN, \
644
category_group, name, id, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
645
#define TRACE_EVENT_FLOW_BEGIN2(category_group, name, id, arg1_name, arg1_val, \
646
arg2_name, arg2_val) \
647
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_BEGIN, \
648
category_group, name, id, TRACE_EVENT_FLAG_NONE, \
649
arg1_name, arg1_val, arg2_name, arg2_val)
650
#define TRACE_EVENT_COPY_FLOW_BEGIN0(category_group, name, id) \
651
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_BEGIN, \
652
category_group, name, id, TRACE_EVENT_FLAG_COPY)
653
#define TRACE_EVENT_COPY_FLOW_BEGIN1(category_group, name, id, arg1_name, \
655
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_BEGIN, \
656
category_group, name, id, TRACE_EVENT_FLAG_COPY, \
658
#define TRACE_EVENT_COPY_FLOW_BEGIN2(category_group, name, id, arg1_name, \
659
arg1_val, arg2_name, arg2_val) \
660
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_BEGIN, \
661
category_group, name, id, TRACE_EVENT_FLAG_COPY, \
662
arg1_name, arg1_val, arg2_name, arg2_val)
664
// Records a single FLOW_STEP event for |step| immediately. If the category
665
// is not enabled, then this does nothing. The |name| and |id| must match the
666
// FLOW_BEGIN event above. The |step| param identifies this step within the
667
// async event. This should be called at the beginning of the next phase of an
668
// asynchronous operation.
669
#define TRACE_EVENT_FLOW_STEP0(category_group, name, id, step) \
670
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_STEP, \
671
category_group, name, id, TRACE_EVENT_FLAG_NONE, "step", step)
672
#define TRACE_EVENT_FLOW_STEP1(category_group, name, id, step, \
673
arg1_name, arg1_val) \
674
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_STEP, \
675
category_group, name, id, TRACE_EVENT_FLAG_NONE, "step", step, \
677
#define TRACE_EVENT_COPY_FLOW_STEP0(category_group, name, id, step) \
678
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_STEP, \
679
category_group, name, id, TRACE_EVENT_FLAG_COPY, "step", step)
680
#define TRACE_EVENT_COPY_FLOW_STEP1(category_group, name, id, step, \
681
arg1_name, arg1_val) \
682
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_STEP, \
683
category_group, name, id, TRACE_EVENT_FLAG_COPY, "step", step, \
686
// Records a single FLOW_END event for "name" immediately. If the category
687
// is not enabled, then this does nothing.
688
#define TRACE_EVENT_FLOW_END0(category_group, name, id) \
689
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_END, \
690
category_group, name, id, TRACE_EVENT_FLAG_NONE)
691
#define TRACE_EVENT_FLOW_END1(category_group, name, id, arg1_name, arg1_val) \
692
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_END, \
693
category_group, name, id, TRACE_EVENT_FLAG_NONE, arg1_name, arg1_val)
694
#define TRACE_EVENT_FLOW_END2(category_group, name, id, arg1_name, arg1_val, \
695
arg2_name, arg2_val) \
696
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_END, \
697
category_group, name, id, TRACE_EVENT_FLAG_NONE, \
698
arg1_name, arg1_val, arg2_name, arg2_val)
699
#define TRACE_EVENT_COPY_FLOW_END0(category_group, name, id) \
700
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_END, \
701
category_group, name, id, TRACE_EVENT_FLAG_COPY)
702
#define TRACE_EVENT_COPY_FLOW_END1(category_group, name, id, arg1_name, \
704
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_END, \
705
category_group, name, id, TRACE_EVENT_FLAG_COPY, \
707
#define TRACE_EVENT_COPY_FLOW_END2(category_group, name, id, arg1_name, \
708
arg1_val, arg2_name, arg2_val) \
709
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_FLOW_END, \
710
category_group, name, id, TRACE_EVENT_FLAG_COPY, \
711
arg1_name, arg1_val, arg2_name, arg2_val)
713
// Macros to track the life time and value of arbitrary client objects.
714
// See also TraceTrackableObject.
715
#define TRACE_EVENT_OBJECT_CREATED_WITH_ID(category_group, name, id) \
716
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_CREATE_OBJECT, \
717
category_group, name, TRACE_ID_DONT_MANGLE(id), TRACE_EVENT_FLAG_NONE)
719
#define TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(category_group, name, id, snapshot) \
720
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_SNAPSHOT_OBJECT, \
721
category_group, name, TRACE_ID_DONT_MANGLE(id), TRACE_EVENT_FLAG_NONE,\
722
"snapshot", snapshot)
724
#define TRACE_EVENT_OBJECT_DELETED_WITH_ID(category_group, name, id) \
725
INTERNAL_TRACE_EVENT_ADD_WITH_ID(TRACE_EVENT_PHASE_DELETE_OBJECT, \
726
category_group, name, TRACE_ID_DONT_MANGLE(id), TRACE_EVENT_FLAG_NONE)
728
#define INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE() \
729
UNLIKELY(*INTERNAL_TRACE_EVENT_UID(category_group_enabled) & \
730
(base::debug::TraceLog::ENABLED_FOR_RECORDING | \
731
base::debug::TraceLog::ENABLED_FOR_EVENT_CALLBACK))
733
// Macro to efficiently determine if a given category group is enabled.
734
#define TRACE_EVENT_CATEGORY_GROUP_ENABLED(category_group, ret) \
736
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
737
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \
744
// Macro to efficiently determine, through polling, if a new trace has begun.
745
#define TRACE_EVENT_IS_NEW_TRACE(ret) \
747
static int INTERNAL_TRACE_EVENT_UID(lastRecordingNumber) = 0; \
748
int num_traces_recorded = TRACE_EVENT_API_GET_NUM_TRACES_RECORDED(); \
749
if (num_traces_recorded != -1 && \
750
num_traces_recorded != \
751
INTERNAL_TRACE_EVENT_UID(lastRecordingNumber)) { \
752
INTERNAL_TRACE_EVENT_UID(lastRecordingNumber) = \
753
num_traces_recorded; \
760
////////////////////////////////////////////////////////////////////////////////
761
// Implementation specific tracing API definitions.
763
// Get a pointer to the enabled state of the given trace category. Only
764
// long-lived literal strings should be given as the category group. The
765
// returned pointer can be held permanently in a local static for example. If
766
// the unsigned char is non-zero, tracing is enabled. If tracing is enabled,
767
// TRACE_EVENT_API_ADD_TRACE_EVENT can be called. It's OK if tracing is disabled
768
// between the load of the tracing state and the call to
769
// TRACE_EVENT_API_ADD_TRACE_EVENT, because this flag only provides an early out
770
// for best performance when tracing is disabled.
771
// const unsigned char*
772
// TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(const char* category_group)
773
#define TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED \
774
base::debug::TraceLog::GetCategoryGroupEnabled
776
// Get the number of times traces have been recorded. This is used to implement
777
// the TRACE_EVENT_IS_NEW_TRACE facility.
778
// unsigned int TRACE_EVENT_API_GET_NUM_TRACES_RECORDED()
779
#define TRACE_EVENT_API_GET_NUM_TRACES_RECORDED \
780
base::debug::TraceLog::GetInstance()->GetNumTracesRecorded
782
// Add a trace event to the platform tracing system.
783
// base::debug::TraceEventHandle TRACE_EVENT_API_ADD_TRACE_EVENT(
785
// const unsigned char* category_group_enabled,
787
// unsigned long long id,
789
// const char** arg_names,
790
// const unsigned char* arg_types,
791
// const unsigned long long* arg_values,
792
// unsigned char flags)
793
#define TRACE_EVENT_API_ADD_TRACE_EVENT \
794
base::debug::TraceLog::GetInstance()->AddTraceEvent
796
// Add a trace event to the platform tracing system.
797
// base::debug::TraceEventHandle TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_TIMESTAMP(
799
// const unsigned char* category_group_enabled,
801
// unsigned long long id,
803
// const TimeTicks& timestamp,
805
// const char** arg_names,
806
// const unsigned char* arg_types,
807
// const unsigned long long* arg_values,
808
// unsigned char flags)
809
#define TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP \
810
base::debug::TraceLog::GetInstance()->AddTraceEventWithThreadIdAndTimestamp
812
// Set the duration field of a COMPLETE trace event.
813
// void TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(
814
// const unsigned char* category_group_enabled,
816
// base::debug::TraceEventHandle id)
817
#define TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION \
818
base::debug::TraceLog::GetInstance()->UpdateTraceEventDuration
820
// Defines atomic operations used internally by the tracing system.
821
#define TRACE_EVENT_API_ATOMIC_WORD base::subtle::AtomicWord
822
#define TRACE_EVENT_API_ATOMIC_LOAD(var) base::subtle::NoBarrier_Load(&(var))
823
#define TRACE_EVENT_API_ATOMIC_STORE(var, value) \
824
base::subtle::NoBarrier_Store(&(var), (value))
826
// Defines visibility for classes in trace_event.h
827
#define TRACE_EVENT_API_CLASS_EXPORT BASE_EXPORT
829
// The thread buckets for the sampling profiler.
830
TRACE_EVENT_API_CLASS_EXPORT extern \
831
TRACE_EVENT_API_ATOMIC_WORD g_trace_state[3];
833
#define TRACE_EVENT_API_THREAD_BUCKET(thread_bucket) \
834
g_trace_state[thread_bucket]
836
////////////////////////////////////////////////////////////////////////////////
838
// Implementation detail: trace event macros create temporary variables
839
// to keep instrumentation overhead low. These macros give each temporary
840
// variable a unique name based on the line number to prevent name collisions.
841
#define INTERNAL_TRACE_EVENT_UID3(a,b) \
842
trace_event_unique_##a##b
843
#define INTERNAL_TRACE_EVENT_UID2(a,b) \
844
INTERNAL_TRACE_EVENT_UID3(a,b)
845
#define INTERNAL_TRACE_EVENT_UID(name_prefix) \
846
INTERNAL_TRACE_EVENT_UID2(name_prefix, __LINE__)
848
// Implementation detail: internal macro to create static category.
849
// No barriers are needed, because this code is designed to operate safely
850
// even when the unsigned char* points to garbage data (which may be the case
851
// on processors without cache coherency).
852
#define INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO_CUSTOM_VARIABLES( \
853
category_group, atomic, category_group_enabled) \
854
category_group_enabled = \
855
reinterpret_cast<const unsigned char*>(TRACE_EVENT_API_ATOMIC_LOAD( \
857
if (UNLIKELY(!category_group_enabled)) { \
858
category_group_enabled = \
859
TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(category_group); \
860
TRACE_EVENT_API_ATOMIC_STORE(atomic, \
861
reinterpret_cast<TRACE_EVENT_API_ATOMIC_WORD>( \
862
category_group_enabled)); \
865
#define INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group) \
866
static TRACE_EVENT_API_ATOMIC_WORD INTERNAL_TRACE_EVENT_UID(atomic) = 0; \
867
const unsigned char* INTERNAL_TRACE_EVENT_UID(category_group_enabled); \
868
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO_CUSTOM_VARIABLES(category_group, \
869
INTERNAL_TRACE_EVENT_UID(atomic), \
870
INTERNAL_TRACE_EVENT_UID(category_group_enabled));
872
// Implementation detail: internal macro to create static category and add
873
// event if the category is enabled.
874
#define INTERNAL_TRACE_EVENT_ADD(phase, category_group, name, flags, ...) \
876
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
877
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \
878
trace_event_internal::AddTraceEvent( \
879
phase, INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, \
880
trace_event_internal::kNoEventId, flags, ##__VA_ARGS__); \
884
// Implementation detail: internal macro to create static category and add begin
885
// event if the category is enabled. Also adds the end event when the scope
887
#define INTERNAL_TRACE_EVENT_ADD_SCOPED(category_group, name, ...) \
888
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
889
trace_event_internal::ScopedTracer INTERNAL_TRACE_EVENT_UID(tracer); \
890
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \
891
base::debug::TraceEventHandle h = trace_event_internal::AddTraceEvent( \
892
TRACE_EVENT_PHASE_COMPLETE, \
893
INTERNAL_TRACE_EVENT_UID(category_group_enabled), \
894
name, trace_event_internal::kNoEventId, \
895
TRACE_EVENT_FLAG_NONE, ##__VA_ARGS__); \
896
INTERNAL_TRACE_EVENT_UID(tracer).Initialize( \
897
INTERNAL_TRACE_EVENT_UID(category_group_enabled), name, h); \
900
// Implementation detail: internal macro to create static category and add
901
// event if the category is enabled.
902
#define INTERNAL_TRACE_EVENT_ADD_WITH_ID(phase, category_group, name, id, \
905
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
906
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \
907
unsigned char trace_event_flags = flags | TRACE_EVENT_FLAG_HAS_ID; \
908
trace_event_internal::TraceID trace_event_trace_id( \
909
id, &trace_event_flags); \
910
trace_event_internal::AddTraceEvent( \
911
phase, INTERNAL_TRACE_EVENT_UID(category_group_enabled), \
912
name, trace_event_trace_id.data(), trace_event_flags, \
917
// Implementation detail: internal macro to create static category and add
918
// event if the category is enabled.
919
#define INTERNAL_TRACE_EVENT_ADD_WITH_ID_TID_AND_TIMESTAMP(phase, \
920
category_group, name, id, thread_id, timestamp, flags, ...) \
922
INTERNAL_TRACE_EVENT_GET_CATEGORY_INFO(category_group); \
923
if (INTERNAL_TRACE_EVENT_CATEGORY_GROUP_ENABLED_FOR_RECORDING_MODE()) { \
924
unsigned char trace_event_flags = flags | TRACE_EVENT_FLAG_HAS_ID; \
925
trace_event_internal::TraceID trace_event_trace_id( \
926
id, &trace_event_flags); \
927
trace_event_internal::AddTraceEventWithThreadIdAndTimestamp( \
928
phase, INTERNAL_TRACE_EVENT_UID(category_group_enabled), \
929
name, trace_event_trace_id.data(), \
930
thread_id, base::TimeTicks::FromInternalValue(timestamp), \
931
trace_event_flags, ##__VA_ARGS__); \
935
// Notes regarding the following definitions:
936
// New values can be added and propagated to third party libraries, but existing
937
// definitions must never be changed, because third party libraries may use old
940
// Phase indicates the nature of an event entry. E.g. part of a begin/end pair.
941
#define TRACE_EVENT_PHASE_BEGIN ('B')
942
#define TRACE_EVENT_PHASE_END ('E')
943
#define TRACE_EVENT_PHASE_COMPLETE ('X')
944
#define TRACE_EVENT_PHASE_INSTANT ('i')
945
#define TRACE_EVENT_PHASE_ASYNC_BEGIN ('S')
946
#define TRACE_EVENT_PHASE_ASYNC_STEP_INTO ('T')
947
#define TRACE_EVENT_PHASE_ASYNC_STEP_PAST ('p')
948
#define TRACE_EVENT_PHASE_ASYNC_END ('F')
949
#define TRACE_EVENT_PHASE_FLOW_BEGIN ('s')
950
#define TRACE_EVENT_PHASE_FLOW_STEP ('t')
951
#define TRACE_EVENT_PHASE_FLOW_END ('f')
952
#define TRACE_EVENT_PHASE_METADATA ('M')
953
#define TRACE_EVENT_PHASE_COUNTER ('C')
954
#define TRACE_EVENT_PHASE_SAMPLE ('P')
955
#define TRACE_EVENT_PHASE_CREATE_OBJECT ('N')
956
#define TRACE_EVENT_PHASE_SNAPSHOT_OBJECT ('O')
957
#define TRACE_EVENT_PHASE_DELETE_OBJECT ('D')
959
// Flags for changing the behavior of TRACE_EVENT_API_ADD_TRACE_EVENT.
960
#define TRACE_EVENT_FLAG_NONE (static_cast<unsigned char>(0))
961
#define TRACE_EVENT_FLAG_COPY (static_cast<unsigned char>(1 << 0))
962
#define TRACE_EVENT_FLAG_HAS_ID (static_cast<unsigned char>(1 << 1))
963
#define TRACE_EVENT_FLAG_MANGLE_ID (static_cast<unsigned char>(1 << 2))
964
#define TRACE_EVENT_FLAG_SCOPE_OFFSET (static_cast<unsigned char>(1 << 3))
966
#define TRACE_EVENT_FLAG_SCOPE_MASK (static_cast<unsigned char>( \
967
TRACE_EVENT_FLAG_SCOPE_OFFSET | (TRACE_EVENT_FLAG_SCOPE_OFFSET << 1)))
969
// Type values for identifying types in the TraceValue union.
970
#define TRACE_VALUE_TYPE_BOOL (static_cast<unsigned char>(1))
971
#define TRACE_VALUE_TYPE_UINT (static_cast<unsigned char>(2))
972
#define TRACE_VALUE_TYPE_INT (static_cast<unsigned char>(3))
973
#define TRACE_VALUE_TYPE_DOUBLE (static_cast<unsigned char>(4))
974
#define TRACE_VALUE_TYPE_POINTER (static_cast<unsigned char>(5))
975
#define TRACE_VALUE_TYPE_STRING (static_cast<unsigned char>(6))
976
#define TRACE_VALUE_TYPE_COPY_STRING (static_cast<unsigned char>(7))
977
#define TRACE_VALUE_TYPE_CONVERTABLE (static_cast<unsigned char>(8))
979
// Enum reflecting the scope of an INSTANT event. Must fit within
980
// TRACE_EVENT_FLAG_SCOPE_MASK.
981
#define TRACE_EVENT_SCOPE_GLOBAL (static_cast<unsigned char>(0 << 3))
982
#define TRACE_EVENT_SCOPE_PROCESS (static_cast<unsigned char>(1 << 3))
983
#define TRACE_EVENT_SCOPE_THREAD (static_cast<unsigned char>(2 << 3))
985
#define TRACE_EVENT_SCOPE_NAME_GLOBAL ('g')
986
#define TRACE_EVENT_SCOPE_NAME_PROCESS ('p')
987
#define TRACE_EVENT_SCOPE_NAME_THREAD ('t')
989
namespace trace_event_internal {
991
// Specify these values when the corresponding argument of AddTraceEvent is not
993
const int kZeroNumArgs = 0;
994
const unsigned long long kNoEventId = 0;
996
// TraceID encapsulates an ID that can either be an integer or pointer. Pointers
997
// are by default mangled with the Process ID so that they are unlikely to
998
// collide when the same pointer is used on different processes.
1003
explicit DontMangle(const void* id)
1004
: data_(static_cast<unsigned long long>(
1005
reinterpret_cast<unsigned long>(id))) {}
1006
explicit DontMangle(unsigned long long id) : data_(id) {}
1007
explicit DontMangle(unsigned long id) : data_(id) {}
1008
explicit DontMangle(unsigned int id) : data_(id) {}
1009
explicit DontMangle(unsigned short id) : data_(id) {}
1010
explicit DontMangle(unsigned char id) : data_(id) {}
1011
explicit DontMangle(long long id)
1012
: data_(static_cast<unsigned long long>(id)) {}
1013
explicit DontMangle(long id)
1014
: data_(static_cast<unsigned long long>(id)) {}
1015
explicit DontMangle(int id)
1016
: data_(static_cast<unsigned long long>(id)) {}
1017
explicit DontMangle(short id)
1018
: data_(static_cast<unsigned long long>(id)) {}
1019
explicit DontMangle(signed char id)
1020
: data_(static_cast<unsigned long long>(id)) {}
1021
unsigned long long data() const { return data_; }
1023
unsigned long long data_;
1028
explicit ForceMangle(unsigned long long id) : data_(id) {}
1029
explicit ForceMangle(unsigned long id) : data_(id) {}
1030
explicit ForceMangle(unsigned int id) : data_(id) {}
1031
explicit ForceMangle(unsigned short id) : data_(id) {}
1032
explicit ForceMangle(unsigned char id) : data_(id) {}
1033
explicit ForceMangle(long long id)
1034
: data_(static_cast<unsigned long long>(id)) {}
1035
explicit ForceMangle(long id)
1036
: data_(static_cast<unsigned long long>(id)) {}
1037
explicit ForceMangle(int id)
1038
: data_(static_cast<unsigned long long>(id)) {}
1039
explicit ForceMangle(short id)
1040
: data_(static_cast<unsigned long long>(id)) {}
1041
explicit ForceMangle(signed char id)
1042
: data_(static_cast<unsigned long long>(id)) {}
1043
unsigned long long data() const { return data_; }
1045
unsigned long long data_;
1048
TraceID(const void* id, unsigned char* flags)
1049
: data_(static_cast<unsigned long long>(
1050
reinterpret_cast<unsigned long>(id))) {
1051
*flags |= TRACE_EVENT_FLAG_MANGLE_ID;
1053
TraceID(ForceMangle id, unsigned char* flags) : data_(id.data()) {
1054
*flags |= TRACE_EVENT_FLAG_MANGLE_ID;
1056
TraceID(DontMangle id, unsigned char* flags) : data_(id.data()) {
1058
TraceID(unsigned long long id, unsigned char* flags)
1059
: data_(id) { (void)flags; }
1060
TraceID(unsigned long id, unsigned char* flags)
1061
: data_(id) { (void)flags; }
1062
TraceID(unsigned int id, unsigned char* flags)
1063
: data_(id) { (void)flags; }
1064
TraceID(unsigned short id, unsigned char* flags)
1065
: data_(id) { (void)flags; }
1066
TraceID(unsigned char id, unsigned char* flags)
1067
: data_(id) { (void)flags; }
1068
TraceID(long long id, unsigned char* flags)
1069
: data_(static_cast<unsigned long long>(id)) { (void)flags; }
1070
TraceID(long id, unsigned char* flags)
1071
: data_(static_cast<unsigned long long>(id)) { (void)flags; }
1072
TraceID(int id, unsigned char* flags)
1073
: data_(static_cast<unsigned long long>(id)) { (void)flags; }
1074
TraceID(short id, unsigned char* flags)
1075
: data_(static_cast<unsigned long long>(id)) { (void)flags; }
1076
TraceID(signed char id, unsigned char* flags)
1077
: data_(static_cast<unsigned long long>(id)) { (void)flags; }
1079
unsigned long long data() const { return data_; }
1082
unsigned long long data_;
1085
// Simple union to store various types as unsigned long long.
1086
union TraceValueUnion {
1088
unsigned long long as_uint;
1091
const void* as_pointer;
1092
const char* as_string;
1095
// Simple container for const char* that should be copied instead of retained.
1096
class TraceStringWithCopy {
1098
explicit TraceStringWithCopy(const char* str) : str_(str) {}
1099
operator const char* () const { return str_; }
1104
// Define SetTraceValue for each allowed type. It stores the type and
1105
// value in the return arguments. This allows this API to avoid declaring any
1106
// structures so that it is portable to third_party libraries.
1107
#define INTERNAL_DECLARE_SET_TRACE_VALUE(actual_type, \
1110
static inline void SetTraceValue( \
1112
unsigned char* type, \
1113
unsigned long long* value) { \
1114
TraceValueUnion type_value; \
1115
type_value.union_member = arg; \
1116
*type = value_type_id; \
1117
*value = type_value.as_uint; \
1119
// Simpler form for int types that can be safely casted.
1120
#define INTERNAL_DECLARE_SET_TRACE_VALUE_INT(actual_type, \
1122
static inline void SetTraceValue( \
1124
unsigned char* type, \
1125
unsigned long long* value) { \
1126
*type = value_type_id; \
1127
*value = static_cast<unsigned long long>(arg); \
1130
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(unsigned long long, TRACE_VALUE_TYPE_UINT)
1131
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(unsigned long, TRACE_VALUE_TYPE_UINT)
1132
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(unsigned int, TRACE_VALUE_TYPE_UINT)
1133
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(unsigned short, TRACE_VALUE_TYPE_UINT)
1134
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(unsigned char, TRACE_VALUE_TYPE_UINT)
1135
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(long long, TRACE_VALUE_TYPE_INT)
1136
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(long, TRACE_VALUE_TYPE_INT)
1137
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(int, TRACE_VALUE_TYPE_INT)
1138
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(short, TRACE_VALUE_TYPE_INT)
1139
INTERNAL_DECLARE_SET_TRACE_VALUE_INT(signed char, TRACE_VALUE_TYPE_INT)
1140
INTERNAL_DECLARE_SET_TRACE_VALUE(bool, as_bool, TRACE_VALUE_TYPE_BOOL)
1141
INTERNAL_DECLARE_SET_TRACE_VALUE(double, as_double, TRACE_VALUE_TYPE_DOUBLE)
1142
INTERNAL_DECLARE_SET_TRACE_VALUE(const void*, as_pointer,
1143
TRACE_VALUE_TYPE_POINTER)
1144
INTERNAL_DECLARE_SET_TRACE_VALUE(const char*, as_string,
1145
TRACE_VALUE_TYPE_STRING)
1146
INTERNAL_DECLARE_SET_TRACE_VALUE(const TraceStringWithCopy&, as_string,
1147
TRACE_VALUE_TYPE_COPY_STRING)
1149
#undef INTERNAL_DECLARE_SET_TRACE_VALUE
1150
#undef INTERNAL_DECLARE_SET_TRACE_VALUE_INT
1152
// std::string version of SetTraceValue so that trace arguments can be strings.
1153
static inline void SetTraceValue(const std::string& arg,
1154
unsigned char* type,
1155
unsigned long long* value) {
1156
TraceValueUnion type_value;
1157
type_value.as_string = arg.c_str();
1158
*type = TRACE_VALUE_TYPE_COPY_STRING;
1159
*value = type_value.as_uint;
1162
// These AddTraceEvent and AddTraceEventWithThreadIdAndTimestamp template
1163
// functions are defined here instead of in the macro, because the arg_values
1164
// could be temporary objects, such as std::string. In order to store
1165
// pointers to the internal c_str and pass through to the tracing API,
1166
// the arg_values must live throughout these procedures.
1168
static inline base::debug::TraceEventHandle
1169
AddTraceEventWithThreadIdAndTimestamp(
1171
const unsigned char* category_group_enabled,
1173
unsigned long long id,
1175
const base::TimeTicks& timestamp,
1176
unsigned char flags,
1177
const char* arg1_name,
1178
const scoped_refptr<base::debug::ConvertableToTraceFormat>& arg1_val) {
1179
const int num_args = 1;
1180
unsigned char arg_types[1] = { TRACE_VALUE_TYPE_CONVERTABLE };
1181
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
1182
phase, category_group_enabled, name, id, thread_id, timestamp,
1183
num_args, &arg1_name, arg_types, NULL, &arg1_val, flags);
1186
template<class ARG1_TYPE>
1187
static inline base::debug::TraceEventHandle
1188
AddTraceEventWithThreadIdAndTimestamp(
1190
const unsigned char* category_group_enabled,
1192
unsigned long long id,
1194
const base::TimeTicks& timestamp,
1195
unsigned char flags,
1196
const char* arg1_name,
1197
const ARG1_TYPE& arg1_val,
1198
const char* arg2_name,
1199
const scoped_refptr<base::debug::ConvertableToTraceFormat>& arg2_val) {
1200
const int num_args = 2;
1201
const char* arg_names[2] = { arg1_name, arg2_name };
1203
unsigned char arg_types[2];
1204
unsigned long long arg_values[2];
1205
SetTraceValue(arg1_val, &arg_types[0], &arg_values[0]);
1206
arg_types[1] = TRACE_VALUE_TYPE_CONVERTABLE;
1208
scoped_refptr<base::debug::ConvertableToTraceFormat> convertable_values[2];
1209
convertable_values[1] = arg2_val;
1211
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
1212
phase, category_group_enabled, name, id, thread_id, timestamp,
1213
num_args, arg_names, arg_types, arg_values, convertable_values, flags);
1216
template<class ARG2_TYPE>
1217
static inline base::debug::TraceEventHandle
1218
AddTraceEventWithThreadIdAndTimestamp(
1220
const unsigned char* category_group_enabled,
1222
unsigned long long id,
1224
const base::TimeTicks& timestamp,
1225
unsigned char flags,
1226
const char* arg1_name,
1227
const scoped_refptr<base::debug::ConvertableToTraceFormat>& arg1_val,
1228
const char* arg2_name,
1229
const ARG2_TYPE& arg2_val) {
1230
const int num_args = 2;
1231
const char* arg_names[2] = { arg1_name, arg2_name };
1233
unsigned char arg_types[2];
1234
unsigned long long arg_values[2];
1235
arg_types[0] = TRACE_VALUE_TYPE_CONVERTABLE;
1237
SetTraceValue(arg2_val, &arg_types[1], &arg_values[1]);
1239
scoped_refptr<base::debug::ConvertableToTraceFormat> convertable_values[2];
1240
convertable_values[0] = arg1_val;
1242
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
1243
phase, category_group_enabled, name, id, thread_id, timestamp,
1244
num_args, arg_names, arg_types, arg_values, convertable_values, flags);
1247
static inline base::debug::TraceEventHandle
1248
AddTraceEventWithThreadIdAndTimestamp(
1250
const unsigned char* category_group_enabled,
1252
unsigned long long id,
1254
const base::TimeTicks& timestamp,
1255
unsigned char flags,
1256
const char* arg1_name,
1257
const scoped_refptr<base::debug::ConvertableToTraceFormat>& arg1_val,
1258
const char* arg2_name,
1259
const scoped_refptr<base::debug::ConvertableToTraceFormat>& arg2_val) {
1260
const int num_args = 2;
1261
const char* arg_names[2] = { arg1_name, arg2_name };
1262
unsigned char arg_types[2] =
1263
{ TRACE_VALUE_TYPE_CONVERTABLE, TRACE_VALUE_TYPE_CONVERTABLE };
1264
scoped_refptr<base::debug::ConvertableToTraceFormat> convertable_values[2] =
1265
{ arg1_val, arg2_val };
1267
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
1268
phase, category_group_enabled, name, id, thread_id, timestamp,
1269
num_args, arg_names, arg_types, NULL, convertable_values, flags);
1272
static inline base::debug::TraceEventHandle
1273
AddTraceEventWithThreadIdAndTimestamp(
1275
const unsigned char* category_group_enabled,
1277
unsigned long long id,
1279
const base::TimeTicks& timestamp,
1280
unsigned char flags) {
1281
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
1282
phase, category_group_enabled, name, id, thread_id, timestamp,
1283
kZeroNumArgs, NULL, NULL, NULL, NULL, flags);
1286
static inline base::debug::TraceEventHandle AddTraceEvent(
1288
const unsigned char* category_group_enabled,
1290
unsigned long long id,
1291
unsigned char flags) {
1292
int thread_id = static_cast<int>(base::PlatformThread::CurrentId());
1293
base::TimeTicks now = base::TimeTicks::NowFromSystemTraceTime();
1294
return AddTraceEventWithThreadIdAndTimestamp(phase, category_group_enabled,
1295
name, id, thread_id, now, flags);
1298
template<class ARG1_TYPE>
1299
static inline base::debug::TraceEventHandle
1300
AddTraceEventWithThreadIdAndTimestamp(
1302
const unsigned char* category_group_enabled,
1304
unsigned long long id,
1306
const base::TimeTicks& timestamp,
1307
unsigned char flags,
1308
const char* arg1_name,
1309
const ARG1_TYPE& arg1_val) {
1310
const int num_args = 1;
1311
unsigned char arg_types[1];
1312
unsigned long long arg_values[1];
1313
SetTraceValue(arg1_val, &arg_types[0], &arg_values[0]);
1314
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
1315
phase, category_group_enabled, name, id, thread_id, timestamp,
1316
num_args, &arg1_name, arg_types, arg_values, NULL, flags);
1319
template<class ARG1_TYPE>
1320
static inline base::debug::TraceEventHandle AddTraceEvent(
1322
const unsigned char* category_group_enabled,
1324
unsigned long long id,
1325
unsigned char flags,
1326
const char* arg1_name,
1327
const ARG1_TYPE& arg1_val) {
1328
int thread_id = static_cast<int>(base::PlatformThread::CurrentId());
1329
base::TimeTicks now = base::TimeTicks::NowFromSystemTraceTime();
1330
return AddTraceEventWithThreadIdAndTimestamp(phase, category_group_enabled,
1331
name, id, thread_id, now, flags,
1332
arg1_name, arg1_val);
1335
template<class ARG1_TYPE, class ARG2_TYPE>
1336
static inline base::debug::TraceEventHandle
1337
AddTraceEventWithThreadIdAndTimestamp(
1339
const unsigned char* category_group_enabled,
1341
unsigned long long id,
1343
const base::TimeTicks& timestamp,
1344
unsigned char flags,
1345
const char* arg1_name,
1346
const ARG1_TYPE& arg1_val,
1347
const char* arg2_name,
1348
const ARG2_TYPE& arg2_val) {
1349
const int num_args = 2;
1350
const char* arg_names[2] = { arg1_name, arg2_name };
1351
unsigned char arg_types[2];
1352
unsigned long long arg_values[2];
1353
SetTraceValue(arg1_val, &arg_types[0], &arg_values[0]);
1354
SetTraceValue(arg2_val, &arg_types[1], &arg_values[1]);
1355
return TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_THREAD_ID_AND_TIMESTAMP(
1356
phase, category_group_enabled, name, id, thread_id, timestamp,
1357
num_args, arg_names, arg_types, arg_values, NULL, flags);
1360
template<class ARG1_TYPE, class ARG2_TYPE>
1361
static inline base::debug::TraceEventHandle AddTraceEvent(
1363
const unsigned char* category_group_enabled,
1365
unsigned long long id,
1366
unsigned char flags,
1367
const char* arg1_name,
1368
const ARG1_TYPE& arg1_val,
1369
const char* arg2_name,
1370
const ARG2_TYPE& arg2_val) {
1371
int thread_id = static_cast<int>(base::PlatformThread::CurrentId());
1372
base::TimeTicks now = base::TimeTicks::NowFromSystemTraceTime();
1373
return AddTraceEventWithThreadIdAndTimestamp(phase, category_group_enabled,
1374
name, id, thread_id, now, flags,
1375
arg1_name, arg1_val,
1376
arg2_name, arg2_val);
1379
// Used by TRACE_EVENTx macros. Do not use directly.
1380
class TRACE_EVENT_API_CLASS_EXPORT ScopedTracer {
1382
// Note: members of data_ intentionally left uninitialized. See Initialize.
1383
ScopedTracer() : p_data_(NULL) {}
1386
if (p_data_ && *data_.category_group_enabled)
1387
TRACE_EVENT_API_UPDATE_TRACE_EVENT_DURATION(
1388
data_.category_group_enabled, data_.name, data_.event_handle);
1391
void Initialize(const unsigned char* category_group_enabled,
1393
base::debug::TraceEventHandle event_handle) {
1394
data_.category_group_enabled = category_group_enabled;
1396
data_.event_handle = event_handle;
1401
// This Data struct workaround is to avoid initializing all the members
1402
// in Data during construction of this object, since this object is always
1403
// constructed, even when tracing is disabled. If the members of Data were
1404
// members of this class instead, compiler warnings occur about potential
1405
// uninitialized accesses.
1407
const unsigned char* category_group_enabled;
1409
base::debug::TraceEventHandle event_handle;
1415
// Used by TRACE_EVENT_BINARY_EFFICIENTx macro. Do not use directly.
1416
class TRACE_EVENT_API_CLASS_EXPORT ScopedTraceBinaryEfficient {
1418
ScopedTraceBinaryEfficient(const char* category_group, const char* name);
1419
~ScopedTraceBinaryEfficient();
1422
const unsigned char* category_group_enabled_;
1424
base::debug::TraceEventHandle event_handle_;
1427
// This macro generates less code then TRACE_EVENT0 but is also
1428
// slower to execute when tracing is off. It should generally only be
1429
// used with code that is seldom executed or conditionally executed
1431
// For now the category_group must be "gpu".
1432
#define TRACE_EVENT_BINARY_EFFICIENT0(category_group, name) \
1433
trace_event_internal::ScopedTraceBinaryEfficient \
1434
INTERNAL_TRACE_EVENT_UID(scoped_trace)(category_group, name);
1436
// TraceEventSamplingStateScope records the current sampling state
1437
// and sets a new sampling state. When the scope exists, it restores
1438
// the sampling state having recorded.
1439
template<size_t BucketNumber>
1440
class TraceEventSamplingStateScope {
1442
TraceEventSamplingStateScope(const char* category_and_name) {
1443
previous_state_ = TraceEventSamplingStateScope<BucketNumber>::Current();
1444
TraceEventSamplingStateScope<BucketNumber>::Set(category_and_name);
1447
~TraceEventSamplingStateScope() {
1448
TraceEventSamplingStateScope<BucketNumber>::Set(previous_state_);
1451
static inline const char* Current() {
1452
return reinterpret_cast<const char*>(TRACE_EVENT_API_ATOMIC_LOAD(
1453
g_trace_state[BucketNumber]));
1456
static inline void Set(const char* category_and_name) {
1457
TRACE_EVENT_API_ATOMIC_STORE(
1458
g_trace_state[BucketNumber],
1459
reinterpret_cast<TRACE_EVENT_API_ATOMIC_WORD>(
1460
const_cast<char*>(category_and_name)));
1464
const char* previous_state_;
1467
} // namespace trace_event_internal
1472
template<typename IDType> class TraceScopedTrackableObject {
1474
TraceScopedTrackableObject(const char* category_group, const char* name,
1476
: category_group_(category_group),
1479
TRACE_EVENT_OBJECT_CREATED_WITH_ID(category_group_, name_, id_);
1482
template <typename ArgType> void snapshot(ArgType snapshot) {
1483
TRACE_EVENT_OBJECT_SNAPSHOT_WITH_ID(category_group_, name_, id_, snapshot);
1486
~TraceScopedTrackableObject() {
1487
TRACE_EVENT_OBJECT_DELETED_WITH_ID(category_group_, name_, id_);
1491
const char* category_group_;
1495
DISALLOW_COPY_AND_ASSIGN(TraceScopedTrackableObject);
1498
} // namespace debug
1501
#endif /* BASE_DEBUG_TRACE_EVENT_H_ */