src/base/debug/trace_event_win.cc

   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
  10 namespace base {
  11 namespace debug {
  12
  13 using base::win::EtwEventType;
  14 using base::win::EtwMofEvent;
  15
  16 // {3DADA31D-19EF-4dc1-B345-037927193422}
  17 const GUID kChromeTraceProviderName = {
  18     0x3dada31d, 0x19ef, 0x4dc1, 0xb3, 0x45, 0x3, 0x79, 0x27, 0x19, 0x34, 0x22 };
  19
  20 // {B967AE67-BB22-49d7-9406-55D91EE1D560}
  21 const GUID kTraceEventClass32 = {
  22     0xb967ae67, 0xbb22, 0x49d7, 0x94, 0x6, 0x55, 0xd9, 0x1e, 0xe1, 0xd5, 0x60 };
  23
  24 // {97BE602D-2930-4ac3-8046-B6763B631DFE}
  25 const GUID kTraceEventClass64 = {
  26     0x97be602d, 0x2930, 0x4ac3, 0x80, 0x46, 0xb6, 0x76, 0x3b, 0x63, 0x1d, 0xfe};
  27
  28
  29 TraceEventETWProvider::TraceEventETWProvider() :
  30     EtwTraceProvider(kChromeTraceProviderName) {
  31   Register();
  32 }
  33
  34 TraceEventETWProvider* TraceEventETWProvider::GetInstance() {
  35   return Singleton<TraceEventETWProvider,
  36       StaticMemorySingletonTraits<TraceEventETWProvider> >::get();
  37 }
  38
  39 bool TraceEventETWProvider::StartTracing() {
  40   return true;
  41 }
  42
  43 void 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
 100 void 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
 118 void TraceEventETWProvider::Resurrect() {
 119   StaticMemorySingletonTraits<TraceEventETWProvider>::Resurrect();
 120 }
 121
 122 }  // namespace debug
 123 }  // namespace base