[3.12] gh-100227: Lock Around Adding Global Audit Hooks (gh-105515) (gh-105525)

The risk of a race with this state is relatively low, but we play it safe anyway.
(cherry picked from commit e822a676f1f3bef6c5413e9b856db481c08ac2a5)

1 files changed, 4 insertions, 1 deletions

diff --git a/Include/internal/pycore_runtime.h b/Include/internal/pycore_runtime.h
index 6e06e87..8f51e2d 100644
--- a/Include/internal/pycore_runtime.h
+++ b/Include/internal/pycore_runtime.h
@@ -143,7 +143,10 @@ typedef struct pyruntimestate {
     // is called multiple times.
     Py_OpenCodeHookFunction open_code_hook;
     void *open_code_userdata;
-    _Py_AuditHookEntry *audit_hook_head;
+    struct {
+        PyThread_type_lock mutex;
+        _Py_AuditHookEntry *head;
+    } audit_hooks;
 
     struct _py_object_runtime_state object_state;
     struct _Py_float_runtime_state float_state;