GVL Instrumentation API: add STARTED and EXITED events

[Feature #18339]

After experimenting with the initial version of the API I figured there is a need
for an exit event to cleanup instrumentation data. e.g. if you record data in a
{thread_id -> data} table, you need to free associated data when a thread goes away.

1 files changed, 6 insertions, 4 deletions

diff --git a/include/ruby/thread.h b/include/ruby/thread.h
index 7f9e623fe5..299aa2d62e 100644
--- a/include/ruby/thread.h
+++ b/include/ruby/thread.h
@@ -190,10 +190,12 @@ void *rb_nogvl(void *(*func)(void *), void *data1,
  */
 #define RUBY_CALL_WO_GVL_FLAG_SKIP_CHECK_INTS_
 
-#define RUBY_INTERNAL_THREAD_EVENT_READY      0x01 /** acquiring GVL */
-#define RUBY_INTERNAL_THREAD_EVENT_RESUMED    0x02 /** acquired GVL */
-#define RUBY_INTERNAL_THREAD_EVENT_SUSPENDED  0x04 /** released GVL */
-#define RUBY_INTERNAL_THREAD_EVENT_MASK       0x07 /** All Thread events */
+#define RUBY_INTERNAL_THREAD_EVENT_STARTED    1 << 0 /** thread started */
+#define RUBY_INTERNAL_THREAD_EVENT_READY      1 << 1 /** acquiring GVL */
+#define RUBY_INTERNAL_THREAD_EVENT_RESUMED    1 << 2 /** acquired GVL */
+#define RUBY_INTERNAL_THREAD_EVENT_SUSPENDED  1 << 3 /** released GVL */
+#define RUBY_INTERNAL_THREAD_EVENT_EXITED     1 << 4 /** thread terminated */
+#define RUBY_INTERNAL_THREAD_EVENT_MASK       0xff /** All Thread events */
 
 typedef void rb_internal_thread_event_data_t; // for future extension.