Endless thread safe timeline recorder

runtime/vm/thread.h

Index: runtime/vm/thread.h
diff --git a/runtime/vm/thread.h b/runtime/vm/thread.h
index 2b2d343e94f419e3a95eae2745efe4f669e25254..a0b3c609617a94d3641e985bc33f03a9a95f2717 100644
--- a/runtime/vm/thread.h
+++ b/runtime/vm/thread.h
@@ -19,6 +19,7 @@ class Object;
 class RawBool;
 class RawObject;
 class StackResource;
+class TimelineEventBlock;
 class Zone;
 
 
@@ -187,6 +188,7 @@ class Thread {
     Zone* zone;
     uword top_exit_frame_info;
     StackResource* top_resource;
+    TimelineEventBlock* current_block;

[koda, 2015/08/07 01:09:54]

Name is a bit too general; consider adding "_timeline" or "_event" to avoid
confusion with store_buffer_block. Ditto below.

[Cutch, 2015/08/07 16:47:42]

Done.

 #if defined(DEBUG)
     HandleScope* top_handle_scope;
     intptr_t no_handle_scope_depth;
@@ -204,6 +206,14 @@ CACHED_CONSTANTS_LIST(DEFINE_OFFSET_METHOD)
   static bool CanLoadFromThread(const Object& object);
   static intptr_t OffsetFromThread(const Object& object);
 
+  TimelineEventBlock* current_block() const {
+    return state_.current_block;
+  }
+
+  void set_current_block(TimelineEventBlock* block) {
+    state_.current_block = block;
+  }
+
  private:
   static ThreadLocalKey thread_key_;
 
@@ -235,6 +245,7 @@ CACHED_CONSTANTS_LIST(DECLARE_MEMBERS)
   static void SetCurrent(Thread* current);
 
   void Schedule(Isolate* isolate);
+  void PostSchedule();
   void Unschedule();
 
   friend class ApiZone;