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Issue 12316146: Expose global state variables for sampling tracing to WebKit (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Updated nits Created 7 years, 9 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 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 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 #include "webkit/glue/webkitplatformsupport_impl.h" 5 #include "webkit/glue/webkitplatformsupport_impl.h"
6 6
7 #include <math.h> 7 #include <math.h>
8 8
9 #include <vector> 9 #include <vector>
10 10
11 #include "base/allocator/allocator_extension.h" 11 #include "base/allocator/allocator_extension.h"
12 #include "base/bind.h" 12 #include "base/bind.h"
13 #include "base/debug/trace_event.h"
14 #include "base/memory/discardable_memory.h" 13 #include "base/memory/discardable_memory.h"
15 #include "base/memory/scoped_ptr.h" 14 #include "base/memory/scoped_ptr.h"
16 #include "base/memory/singleton.h" 15 #include "base/memory/singleton.h"
17 #include "base/message_loop.h" 16 #include "base/message_loop.h"
18 #include "base/metrics/histogram.h" 17 #include "base/metrics/histogram.h"
19 #include "base/metrics/stats_counters.h" 18 #include "base/metrics/stats_counters.h"
20 #include "base/platform_file.h" 19 #include "base/platform_file.h"
21 #include "base/process_util.h" 20 #include "base/process_util.h"
22 #include "base/rand_util.h" 21 #include "base/rand_util.h"
23 #include "base/string_number_conversions.h" 22 #include "base/string_number_conversions.h"
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446 boundary_value + 1, base::HistogramBase::kUmaTargetedHistogramFlag); 445 boundary_value + 1, base::HistogramBase::kUmaTargetedHistogramFlag);
447 DCHECK_EQ(name, counter->histogram_name()); 446 DCHECK_EQ(name, counter->histogram_name());
448 counter->Add(sample); 447 counter->Add(sample);
449 } 448 }
450 449
451 const unsigned char* WebKitPlatformSupportImpl::getTraceCategoryEnabledFlag( 450 const unsigned char* WebKitPlatformSupportImpl::getTraceCategoryEnabledFlag(
452 const char* category_name) { 451 const char* category_name) {
453 return TRACE_EVENT_API_GET_CATEGORY_ENABLED(category_name); 452 return TRACE_EVENT_API_GET_CATEGORY_ENABLED(category_name);
454 } 453 }
455 454
455 TRACE_EVENT_API_ATOMIC_WORD* WebKitPlatformSupportImpl::getTraceSamplingState(
456 const unsigned thread_bucket) {
457 switch(thread_bucket) {
abarth-chromium 2013/02/27 02:58:00 Is this really better than a branch + TRACE_EVENT_
haraken 2013/02/27 03:29:55 I cannot use it because it results in 'g_trace_sta
458 case 0:
459 return reinterpret_cast<TRACE_EVENT_API_ATOMIC_WORD*>(
460 &TRACE_EVENT_API_THREAD_BUCKET(0));
461 case 1:
462 return reinterpret_cast<TRACE_EVENT_API_ATOMIC_WORD*>(
463 &TRACE_EVENT_API_THREAD_BUCKET(1));
464 case 2:
465 return reinterpret_cast<TRACE_EVENT_API_ATOMIC_WORD*>(
466 &TRACE_EVENT_API_THREAD_BUCKET(2));
467 default:
468 NOTREACHED() << "Unknown thread bucket type.";
469 }
470 return NULL;
471 }
472
456 void WebKitPlatformSupportImpl::addTraceEvent( 473 void WebKitPlatformSupportImpl::addTraceEvent(
457 char phase, 474 char phase,
458 const unsigned char* category_enabled, 475 const unsigned char* category_enabled,
459 const char* name, 476 const char* name,
460 unsigned long long id, 477 unsigned long long id,
461 int num_args, 478 int num_args,
462 const char** arg_names, 479 const char** arg_names,
463 const unsigned char* arg_types, 480 const unsigned char* arg_types,
464 const unsigned long long* arg_values, 481 const unsigned long long* arg_values,
465 unsigned char flags) { 482 unsigned char flags) {
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952 return NULL; 969 return NULL;
953 scoped_ptr<WebDiscardableMemoryImpl> discardable( 970 scoped_ptr<WebDiscardableMemoryImpl> discardable(
954 new WebDiscardableMemoryImpl()); 971 new WebDiscardableMemoryImpl());
955 if (discardable->InitializeAndLock(bytes)) 972 if (discardable->InitializeAndLock(bytes))
956 return discardable.release(); 973 return discardable.release();
957 return NULL; 974 return NULL;
958 } 975 }
959 976
960 977
961 } // namespace webkit_glue 978 } // namespace webkit_glue
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