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Unified Diff: base/trace_event/trace_event_etw_export_win.h

Issue 1038453002: Add option to export tracing events to ETW. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Add missing dependency in base.gyp Created 5 years, 8 months ago
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Index: base/trace_event/trace_event_etw_export_win.h
diff --git a/base/trace_event/trace_event_etw_export_win.h b/base/trace_event/trace_event_etw_export_win.h
new file mode 100644
index 0000000000000000000000000000000000000000..73a9d89ccdf84d934845e6456126d14f3ed0e871
--- /dev/null
+++ b/base/trace_event/trace_event_etw_export_win.h
@@ -0,0 +1,66 @@
+// Copyright (c) 2015 The Chromium Authors. All rights reserved.
Lei Zhang 2015/04/15 08:10:36 nit: no (c)
Georges Khalil 2015/04/15 15:10:32 Done (same in .cc too).
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This file contains the Windows-specific exporting to ETW.
+#ifndef BASE_TRACE_EVENT_TRACE_ETW_EXPORT_H_
+#define BASE_TRACE_EVENT_TRACE_ETW_EXPORT_H_
+
+#include "base/base_export.h"
+#include "base/trace_event/trace_event_impl.h"
+
+// Fwd.
+template <typename Type>
+struct StaticMemorySingletonTraits;
+
+namespace base {
+namespace trace_event {
+
+class BASE_EXPORT TraceEventETWExport {
+ public:
+ ~TraceEventETWExport();
+
+ // Retrieves the singleton.
+ // Note that this may return NULL post-AtExit processing.
+ static TraceEventETWExport* GetInstance();
+
+ static void EnableETWExport();
+ static void DisableETWExport();
+
+ static bool isETWExportEnabled() { return GetInstance()->ETWExportEnabled_; }
+
+ static void AddEvent(
Lei Zhang 2015/04/15 08:10:36 The above methods seem more obvious, but AddEvent(
Georges Khalil 2015/04/15 15:10:32 I added documentation for all functions. Should be
+ char phase,
+ const unsigned char* category_group_enabled,
+ const char* name,
+ unsigned long long id,
+ int num_args,
+ const char** arg_names,
+ const unsigned char* arg_types,
+ const unsigned long long* arg_values,
+ const scoped_refptr<ConvertableToTraceFormat>* convertable_values);
+
+ static void AddCustomEvent(const char* name,
Lei Zhang 2015/04/15 08:10:36 This doesn't seem to have any callers?
Georges Khalil 2015/04/15 15:10:32 Not yet, this is used to add an event that is only
+ char const* phase,
+ const char* arg_name_1,
+ const char* arg_value_1,
+ const char* arg_name_2,
+ const char* arg_value_2,
+ const char* arg_name_3,
+ const char* arg_value_3);
+
+ void Resurrect();
+
+ private:
+ bool ETWExportEnabled_;
+ // Ensure only the provider can construct us.
+ friend struct StaticMemorySingletonTraits<TraceEventETWExport>;
+ TraceEventETWExport();
+
+ DISALLOW_COPY_AND_ASSIGN(TraceEventETWExport);
+};
+
+} // namespace trace_event
+} // namespace base
+
+#endif // BASE_TRACE_EVENT_TRACE_ETW_EXPORT_H_

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