From 097258ca5004abe5e98bcaa9a0195d88ec977a30 Mon Sep 17 00:00:00 2001
From: "Jeong, YunWon" <69878+youknowone@users.noreply.github.com>
Date: Wed, 4 Mar 2026 04:35:52 +0900
Subject: [PATCH] Add monitoring lock reinit and use raw() accessor (#7335)

Add missing reinit_mutex_after_fork for vm.state.monitoring
PyMutex in reinit_locks_after_fork.

Use Mutex::raw() accessor in reinit_parking_lot_mutex instead
of pointer cast from struct start for layout safety.
---
 crates/vm/src/stdlib/posix.rs  | 1 +
 crates/vm/src/stdlib/thread.rs | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/crates/vm/src/stdlib/posix.rs b/crates/vm/src/stdlib/posix.rs
index 7076e42b9..febb3af9b 100644
--- a/crates/vm/src/stdlib/posix.rs
+++ b/crates/vm/src/stdlib/posix.rs
@@ -759,6 +759,7 @@ pub mod module {
             reinit_mutex_after_fork(&vm.state.atexit_funcs);
             reinit_mutex_after_fork(&vm.state.global_trace_func);
             reinit_mutex_after_fork(&vm.state.global_profile_func);
+            reinit_mutex_after_fork(&vm.state.monitoring);
 
             // PyGlobalState parking_lot::Mutex locks
             reinit_mutex_after_fork(&vm.state.thread_frames);
diff --git a/crates/vm/src/stdlib/thread.rs b/crates/vm/src/stdlib/thread.rs
index 00068705a..a3ff23cf2 100644
--- a/crates/vm/src/stdlib/thread.rs
+++ b/crates/vm/src/stdlib/thread.rs
@@ -987,8 +987,8 @@ pub(crate) mod _thread {
     #[cfg(unix)]
     fn reinit_parking_lot_mutex<T: ?Sized>(mutex: &parking_lot::Mutex<T>) {
         unsafe {
-            let ptr = mutex as *const parking_lot::Mutex<T> as *mut u8;
-            core::ptr::write_bytes(ptr, 0, core::mem::size_of::<parking_lot::RawMutex>());
+            let raw = mutex.raw() as *const parking_lot::RawMutex as *mut u8;
+            core::ptr::write_bytes(raw, 0, core::mem::size_of::<parking_lot::RawMutex>());
         }
     }