Index: base/trace_event/memory_tracing_observer.h |
diff --git a/base/trace_event/memory_tracing_observer.h b/base/trace_event/memory_tracing_observer.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..1efea18c4d552509fa5d2c59c0015f165a287a28 |
--- /dev/null |
+++ b/base/trace_event/memory_tracing_observer.h |
@@ -0,0 +1,45 @@ |
+// Copyright 2017 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_MEMORY_TRACING_OBSERVER_H_ |
+#define BASE_TRACE_EVENT_MEMORY_TRACING_OBSERVER_H_ |
+ |
+#include "base/macros.h" |
+#include "base/trace_event/memory_dump_manager.h" |
+#include "base/trace_event/trace_event.h" |
+ |
+namespace base { |
+ |
+namespace trace_event { |
+ |
+// Observes TraceLog for Enable/Disable events and when they occur Enables and |
+// Disables the MemoryDumpManager with the correct state based on reading the |
+// trace log. Also provides a method for adding a dump to the trace. |
+class BASE_EXPORT MemoryTracingObserver |
+ : public TraceLog::EnabledStateObserver { |
+ public: |
+ static const char* const kTraceCategory; |
+ |
+ MemoryTracingObserver(TraceLog*, MemoryDumpManager*); |
+ ~MemoryTracingObserver() override; |
+ |
+ // TraceLog::EnabledStateObserver implementation. |
+ void OnTraceLogEnabled() override; |
+ void OnTraceLogDisabled() override; |
+ |
+ bool AddDumpToTraceIfEnabled(const MemoryDumpRequestArgs*, |
+ const ProcessId, |
+ const ProcessMemoryDump*); |
+ |
+ private: |
+ MemoryDumpManager* const memory_dump_manager_; |
+ TraceLog* const trace_log_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(MemoryTracingObserver); |
+}; |
+ |
+} // namespace trace_event |
+} // namespace base |
+ |
+#endif // BASE_TRACE_EVENT_MEMORY_TRACING_OBSERVER_H_ |