1 // Copyright (c) 2011 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. 4 5 #include "base/debug/trace_event_win.h" 6 7 #include "base/logging.h" 8 #include "base/memory/singleton.h" 9 #include <initguid.h> // NOLINT 10 11 namespace base { 12 namespace debug { 13 14 using base::win::EtwEventType; 15 using base::win::EtwMofEvent; 16 17 // {3DADA31D-19EF-4dc1-B345-037927193422} 18 const GUID kChromeTraceProviderName = { 19 0x3dada31d, 0x19ef, 0x4dc1, 0xb3, 0x45, 0x3, 0x79, 0x27, 0x19, 0x34, 0x22 }; 20 21 // {B967AE67-BB22-49d7-9406-55D91EE1D560} 22 const GUID kTraceEventClass32 = { 23 0xb967ae67, 0xbb22, 0x49d7, 0x94, 0x6, 0x55, 0xd9, 0x1e, 0xe1, 0xd5, 0x60 }; 24 25 // {97BE602D-2930-4ac3-8046-B6763B631DFE} 26 const GUID kTraceEventClass64 = { 27 0x97be602d, 0x2930, 0x4ac3, 0x80, 0x46, 0xb6, 0x76, 0x3b, 0x63, 0x1d, 0xfe}; 28 29 30 TraceLog::TraceLog() : EtwTraceProvider(kChromeTraceProviderName) { 31 Register(); 32 } 33 34 TraceLog* TraceLog::GetInstance() { 35 return Singleton<TraceLog, StaticMemorySingletonTraits<TraceLog> >::get(); 36 } 37 38 bool TraceLog::StartTracing() { 39 return true; 40 } 41 42 void TraceLog::TraceEvent(const char* name, 43 size_t name_len, 44 EventType type, 45 const void* id, 46 const char* extra, 47 size_t extra_len) { 48 // Make sure we don't touch NULL. 49 if (name == NULL) 50 name = ""; 51 if (extra == NULL) 52 extra = ""; 53 54 EtwEventType etw_type = 0; 55 switch (type) { 56 case TraceLog::EVENT_BEGIN: 57 etw_type = kTraceEventTypeBegin; 58 break; 59 case TraceLog::EVENT_END: 60 etw_type = kTraceEventTypeEnd; 61 break; 62 63 case TraceLog::EVENT_INSTANT: 64 etw_type = kTraceEventTypeInstant; 65 break; 66 67 default: 68 NOTREACHED() << "Unknown event type"; 69 etw_type = kTraceEventTypeInstant; 70 break; 71 } 72 73 EtwMofEvent<5> event(kTraceEventClass32, 74 etw_type, 75 TRACE_LEVEL_INFORMATION); 76 event.SetField(0, name_len + 1, name); 77 event.SetField(1, sizeof(id), &id); 78 event.SetField(2, extra_len + 1, extra); 79 80 // See whether we're to capture a backtrace. 81 void* backtrace[32]; 82 if (enable_flags() & CAPTURE_STACK_TRACE) { 83 DWORD hash = 0; 84 DWORD depth = CaptureStackBackTrace(0, 85 arraysize(backtrace), 86 backtrace, 87 &hash); 88 event.SetField(3, sizeof(depth), &depth); 89 event.SetField(4, sizeof(backtrace[0]) * depth, backtrace); 90 } 91 92 // Trace the event. 93 Log(event.get()); 94 } 95 96 void TraceLog::Trace(const char* name, 97 size_t name_len, 98 EventType type, 99 const void* id, 100 const char* extra, 101 size_t extra_len) { 102 TraceLog* provider = TraceLog::GetInstance(); 103 if (provider && provider->IsTracing()) { 104 // Compute the name & extra lengths if not supplied already. 105 if (name_len == -1) 106 name_len = (name == NULL) ? 0 : strlen(name); 107 if (extra_len == -1) 108 extra_len = (extra == NULL) ? 0 : strlen(extra); 109 110 provider->TraceEvent(name, name_len, type, id, extra, extra_len); 111 } 112 } 113 114 void TraceLog::Resurrect() { 115 StaticMemorySingletonTraits<TraceLog>::Resurrect(); 116 } 117 118 } // namespace debug 119 } // namespace base 120
