Add global timeline stream overrides

runtime/vm/timeline.h

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_TIMELINE_H_
 #define VM_TIMELINE_H_
 
 #include "vm/allocation.h"
 #include "vm/bitfield.h"
 
 namespace dart {
 
 class JSONArray;
 class JSONObject;
 class JSONStream;
 class Object;
 class ObjectPointerVisitor;
 class RawArray;
 class Thread;
 class TimelineEvent;
 class TimelineEventBlock;
 class TimelineEventRecorder;
 class TimelineStream;
 
+// (name, enabled by default for isolate).
+#define ISOLATE_TIMELINE_STREAM_LIST(V)                                        \
+  V(API, false)                                                                \
+  V(Compiler, false)                                                           \
+  V(Embedder, false)                                                           \
+  V(GC, false)                                                                 \
+  V(Isolate, false)                                                            \
 
 class Timeline : public AllStatic {
  public:
   // Initialize timeline system. Not thread safe.
   static void InitOnce();
 
   // Shutdown timeline system. Not thread safe.
   static void Shutdown();
 
   // Access the global recorder. Not thread safe.
   static TimelineEventRecorder* recorder();
 
   static bool EnableStreamByDefault(const char* stream_name);
 
   static TimelineStream* GetVMStream();
 
+#define ISOLATE_TIMELINE_STREAM_FLAGS(name, not_used)                          \
+  static const bool* Stream##name##EnabledFlag() {                             \
+    return &stream_##name##_enabled_;                                          \
+  }                                                                            \
+  static void SetStream##name##Enabled(bool enabled) {                         \
+    stream_##name##_enabled_ = enabled;                                        \
+  }
+  ISOLATE_TIMELINE_STREAM_LIST(ISOLATE_TIMELINE_STREAM_FLAGS)
+#undef ISOLATE_TIMELINE_STREAM_FLAGS
+
  private:
   static TimelineEventRecorder* recorder_;
   static TimelineStream* vm_stream_;
 
+#define ISOLATE_TIMELINE_STREAM_DECLARE_FLAG(name, not_used)                   \
+  static bool stream_##name##_enabled_;
+  ISOLATE_TIMELINE_STREAM_LIST(ISOLATE_TIMELINE_STREAM_DECLARE_FLAG)
+#undef ISOLATE_TIMELINE_STREAM_DECLARE_FLAG
+
   friend class TimelineRecorderOverride;
 };
 
 
 // You should get a |TimelineEvent| from a |TimelineStream|.
 class TimelineEvent {
  public:
   // Keep in sync with StateBits below.
   enum EventType {
     kNone,
@@ skipping 128 matching lines @@
 
   class EventTypeField : public BitField<EventType, kEventTypeBit, 4> {};
 
   friend class TimelineTestHelper;
   friend class TimelineStream;
   DISALLOW_COPY_AND_ASSIGN(TimelineEvent);
 };
 
 
 // A stream of timeline events. A stream has a name and can be enabled or
-// disabled.
+// disabled (globally and per isolate).
 class TimelineStream {
  public:
   TimelineStream();
 
-  void Init(const char* name, bool enabled);
+  void Init(const char* name,
+            bool enabled,
+            const bool* globally_enabled = NULL);
 
   const char* name() const {
     return name_;
   }
 
+  bool Enabled() const {
+    return ((globally_enabled_ != NULL) && *globally_enabled_) ||
+           enabled();
+  }
+
   bool enabled() const {
     return enabled_;
   }
 
   void set_enabled(bool enabled) {
     enabled_ = enabled;
   }
 
   // Records an event. Will return |NULL| if not enabled. The returned
   // |TimelineEvent| is in an undefined state and must be initialized.
   TimelineEvent* StartEvent();
 
  private:
   const char* name_;
   bool enabled_;
+  const bool* globally_enabled_;
 };
 
-
-// (name, enabled by default).
-#define ISOLATE_TIMELINE_STREAM_LIST(V)                                        \
-  V(API, false)                                                                \
-  V(Compiler, false)                                                           \
-  V(Embedder, false)                                                           \
-  V(GC, false)                                                                 \
-  V(Isolate, false)                                                            \
-
-
 #define TIMELINE_FUNCTION_COMPILATION_DURATION(thread, suffix, function)       \
   TimelineDurationScope tds(thread,                                            \
                             thread->isolate()->GetCompilerStream(),            \
                             "Compile" suffix);                                 \
   if (tds.enabled()) {                                                         \
     tds.SetNumArguments(1);                                                    \
     tds.CopyArgument(                                                          \
         0,                                                                     \
         "function",                                                            \
         const_cast<char*>(function.ToLibNamePrefixedQualifiedCString()));      \
@@ skipping 351 matching lines @@
   TimelineEventBlock* Next();
 
  private:
   TimelineEventBlock* current_;
   TimelineEventRecorder* recorder_;
 };
 
 }  // namespace dart
 
 #endif  // VM_TIMELINE_H_