Index: base/trace_event/event_name_filter.h |
diff --git a/base/trace_event/event_name_filter.h b/base/trace_event/event_name_filter.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..19333b3e03338d5d6981e71e0c4c3ce2b9073f26 |
--- /dev/null |
+++ b/base/trace_event/event_name_filter.h |
@@ -0,0 +1,46 @@ |
+// Copyright 2016 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#ifndef BASE_TRACE_EVENT_EVENT_NAME_FILTER_H_ |
+#define BASE_TRACE_EVENT_EVENT_NAME_FILTER_H_ |
+ |
+#include <memory> |
+#include <string> |
+#include <unordered_set> |
+ |
+#include "base/base_export.h" |
+#include "base/macros.h" |
+#include "base/trace_event/trace_event_filter.h" |
+ |
+namespace base { |
+namespace trace_event { |
+ |
+class TraceEvent; |
+ |
+// Filters trace events by checking the full name against a whitelist. |
+// The current implementation is quite simple and dumb and just uses a |
+// hashtable which requires char* to std::string conversion. It could be smarter |
+// and use a bloom filter trie. However, today this is used too rarely to |
+// justify that cost. |
+class BASE_EXPORT EventNameFilter : public TraceEventFilter { |
+ public: |
+ using EventNamesWhitelist = std::unordered_set<std::string>; |
+ static const char kName[]; |
+ |
+ EventNameFilter(std::unique_ptr<EventNamesWhitelist>); |
+ ~EventNameFilter() override; |
+ |
+ // TraceEventFilter implementation. |
+ bool FilterTraceEvent(const TraceEvent&) const override; |
+ |
+ private: |
+ std::unique_ptr<const EventNamesWhitelist> event_names_whitelist_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(EventNameFilter); |
+}; |
+ |
+} // namespace trace_event |
+} // namespace base |
+ |
+#endif // BASE_TRACE_EVENT_EVENT_NAME_FILTER_H_ |