Expose all EventLog events as DTrace probes

- Defines a DTrace provider, called 'HaskellEvent', that provides a probe
  for every event of the eventlog framework.
- In contrast to the original eventlog, the DTrace probes are available in
  all flavours of the runtime system (DTrace probes have virtually no
  overhead if not enabled); when -DTRACING is defined both the regular
  event log as well as DTrace probes can be used.
- Currently, Mac OS X only.  User-space DTrace probes are implemented
  differently on Mac OS X than in the original DTrace implementation.
  Nevertheless, it shouldn't be too hard to enable these probes on other
  platforms, too.
- Documentation is at http://hackage.haskell.org/trac/ghc/wiki/DTrace

1 files changed, 2 insertions, 1 deletions

diff --git a/includes/rts/EventLogFormat.h b/includes/rts/EventLogFormat.h
index 83330dadaa..87010eea8a 100644
--- a/includes/rts/EventLogFormat.h
+++ b/includes/rts/EventLogFormat.h
@@ -112,7 +112,7 @@
 #define EVENT_GC_END              10 /* ()                     */
 #define EVENT_REQUEST_SEQ_GC      11 /* ()                     */
 #define EVENT_REQUEST_PAR_GC      12 /* ()                     */
-#define EVENT_CREATE_SPARK_THREAD 15 /* (thread, spark_thread) */
+#define EVENT_CREATE_SPARK_THREAD 15 /* (spark_thread)         */
 #define EVENT_LOG_MSG             16 /* (message ...)          */
 #define EVENT_STARTUP             17 /* (num_capabilities)     */
 #define EVENT_BLOCK_MARKER        18 /* (size, end_time, capability) */
@@ -148,6 +148,7 @@ typedef StgWord64 EventTimestamp; // in nanoseconds
 typedef StgWord32 EventThreadID;
 typedef StgWord16 EventCapNo;
 typedef StgWord16 EventPayloadSize; // variable-size events
+typedef StgWord16 EventThreadStatus; // status for EVENT_STOP_THREAD
 
 #endif