fix(profiling): use official PyGen_yf from CPython 3.13

Author: KowalskiThomas

ddtrace/internal/datadog/profiling/stack_v2/echion/echion/cpython/tasks.h

@@ -171,7 +171,37 @@ extern "C"
 #define RESUME_QUICK INSTRUMENTED_RESUME
 #endif
 
-#if PY_VERSION_HEX >= 0x030b0000
+#if PY_VERSION_HEX >= 0x030d0000
+
+    inline PyObject* PyGen_yf(PyGenObject* gen, PyObject* frame_addr)
+    {
+        if (gen->gi_frame_state != FRAME_SUSPENDED_YIELD_FROM) {
+            return nullptr;
+        }
+
+        _PyInterpreterFrame frame;
+        if (copy_type(frame_addr, frame)) {
+            return nullptr;
+        }
+
+        if (frame.stacktop < 1 || frame.stacktop > (1 << 20)) {
+            return nullptr;
+        }
+
+        auto localsplus = std::make_unique<PyObject*[]>(frame.stacktop);
+
+        // Calculate the remote address of the localsplus array
+        auto remote_localsplus = reinterpret_cast<PyObject**>(reinterpret_cast<uintptr_t>(frame_addr) +
+                                                              offsetof(_PyInterpreterFrame, localsplus));
+        if (copy_generic(remote_localsplus, localsplus.get(), (frame.stacktop) * sizeof(PyObject*))) {
+            return nullptr;
+        }
+
+        return localsplus[frame.stacktop - 1];
+    }
+
+#elif PY_VERSION_HEX >= 0x030b0000
+
     inline PyObject* PyGen_yf(PyGenObject* gen, PyObject* frame_addr)
     {
         PyObject* yf = NULL;

releasenotes/notes/profiling-use-official-pygen-yf-for-313-9e9df6f153fae01f.yaml

@@ -0,0 +1,5 @@
+fixes:
+  - |
+    profiling: This improves stack unwinding for asyncio workloads running Python 3.13+ by replicating
+    the official PyGen_yf function from CPython 3.13. Previously, the sampler would use the version from an older
+    version of CPython, which could lead to incomplete asyncio stacks.