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. 4#include "base/debug/trace_event_win.h" 5 6#include "base/logging.h" 7#include "base/memory/singleton.h" 8#include <initguid.h> // NOLINT 9 10namespace base { 11namespace debug { 12 13using base::win::EtwEventType; 14using base::win::EtwMofEvent; 15 16// {3DADA31D-19EF-4dc1-B345-037927193422} 17const GUID kChromeTraceProviderName = { 18 0x3dada31d, 0x19ef, 0x4dc1, 0xb3, 0x45, 0x3, 0x79, 0x27, 0x19, 0x34, 0x22 }; 19 20// {B967AE67-BB22-49d7-9406-55D91EE1D560} 21const GUID kTraceEventClass32 = { 22 0xb967ae67, 0xbb22, 0x49d7, 0x94, 0x6, 0x55, 0xd9, 0x1e, 0xe1, 0xd5, 0x60 }; 23 24// {97BE602D-2930-4ac3-8046-B6763B631DFE} 25const GUID kTraceEventClass64 = { 26 0x97be602d, 0x2930, 0x4ac3, 0x80, 0x46, 0xb6, 0x76, 0x3b, 0x63, 0x1d, 0xfe}; 27 28 29TraceEventETWProvider::TraceEventETWProvider() : 30 EtwTraceProvider(kChromeTraceProviderName) { 31 Register(); 32} 33 34TraceEventETWProvider* TraceEventETWProvider::GetInstance() { 35 return Singleton<TraceEventETWProvider, 36 StaticMemorySingletonTraits<TraceEventETWProvider> >::get(); 37} 38 39bool TraceEventETWProvider::StartTracing() { 40 return true; 41} 42 43void TraceEventETWProvider::TraceEvent(const char* name, 44 size_t name_len, 45 char type, 46 const void* id, 47 const char* extra, 48 size_t extra_len) { 49 // Make sure we don't touch NULL. 50 if (name == NULL) 51 name = ""; 52 if (extra == NULL) 53 extra = ""; 54 55 EtwEventType etw_type = 0; 56 switch (type) { 57 case TRACE_EVENT_PHASE_BEGIN: 58 etw_type = kTraceEventTypeBegin; 59 break; 60 case TRACE_EVENT_PHASE_END: 61 etw_type = kTraceEventTypeEnd; 62 break; 63 64 case TRACE_EVENT_PHASE_INSTANT: 65 etw_type = kTraceEventTypeInstant; 66 break; 67 68 default: 69 NOTREACHED() << "Unknown event type"; 70 etw_type = kTraceEventTypeInstant; 71 break; 72 } 73 74 EtwMofEvent<5> event(kTraceEventClass32, 75 etw_type, 76 TRACE_LEVEL_INFORMATION); 77 event.SetField(0, name_len + 1, name); 78 event.SetField(1, sizeof(id), &id); 79 event.SetField(2, extra_len + 1, extra); 80 81 // These variables are declared here so that they are not out of scope when 82 // the event is logged. 83 DWORD depth; 84 void* backtrace[32]; 85 86 // See whether we're to capture a backtrace. 87 if (enable_flags() & CAPTURE_STACK_TRACE) { 88 depth = CaptureStackBackTrace(0, 89 arraysize(backtrace), 90 backtrace, 91 NULL); 92 event.SetField(3, sizeof(depth), &depth); 93 event.SetField(4, sizeof(backtrace[0]) * depth, backtrace); 94 } 95 96 // Trace the event. 97 Log(event.get()); 98} 99 100void TraceEventETWProvider::Trace(const char* name, 101 size_t name_len, 102 char type, 103 const void* id, 104 const char* extra, 105 size_t extra_len) { 106 TraceEventETWProvider* provider = TraceEventETWProvider::GetInstance(); 107 if (provider && provider->IsTracing()) { 108 // Compute the name & extra lengths if not supplied already. 109 if (name_len == kUseStrlen) 110 name_len = (name == NULL) ? 0 : strlen(name); 111 if (extra_len == kUseStrlen) 112 extra_len = (extra == NULL) ? 0 : strlen(extra); 113 114 provider->TraceEvent(name, name_len, type, id, extra, extra_len); 115 } 116} 117 118void TraceEventETWProvider::Resurrect() { 119 StaticMemorySingletonTraits<TraceEventETWProvider>::Resurrect(); 120} 121 122} // namespace debug 123} // namespace base 124