fix(profiling): track existing asyncio loop if it exists

Author: KowalskiThomas

ddtrace/profiling/_asyncio.py

@@ -57,7 +57,15 @@ def _(asyncio):
     if THREAD_LINK is None:
         THREAD_LINK = _threading._ThreadLink()
 
-    init_stack_v2 = config.stack.v2_enabled and stack_v2.is_available
+    init_stack_v2: bool = config.stack.v2_enabled and stack_v2.is_available
+
+    if init_stack_v2:
+        try:
+            running_loop = asyncio.get_running_loop()
+            stack_v2.track_asyncio_loop(typing.cast(int, ddtrace_threading.current_thread().ident), running_loop)
+        except RuntimeError:
+            # No existing loop to track, continue
+            pass
 
     @partial(wrap, sys.modules["asyncio.events"].BaseDefaultEventLoopPolicy.set_event_loop)
     def _(f, args, kwargs):

releasenotes/notes/profiling-fix-untracked-existing-event-loop-6842ff15328dae9c.yaml

@@ -0,0 +1,4 @@
+fixes:
+  - |
+    profiling: this fix resolves an issue where importing the profiler module after an asyncio Event Loop had been
+    started would make the Profiler blind to the existing Event Loop and its Tasks.