From d22195e7416e7923e2868e3f250abb457f115fc6 Mon Sep 17 00:00:00 2001
From: Divy Srivastava <dj.srivastava23@gmail.com>
Date: Mon, 14 Oct 2024 12:41:34 +0530
Subject: [PATCH] fix(ext/napi): pass user context to napi_threadsafe_fn
 finalizers (#26229)

Fixes https://github.com/denoland/deno/issues/26228
---
 cli/napi/node_api.rs   | 2 +-
 tests/napi/src/tsfn.rs | 6 ++++--
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/cli/napi/node_api.rs b/cli/napi/node_api.rs
index 2efb71c267c93c..4497a4695aec87 100644
--- a/cli/napi/node_api.rs
+++ b/cli/napi/node_api.rs
@@ -692,7 +692,7 @@ impl Drop for TsFn {
 
     if let Some(finalizer) = self.thread_finalize_cb {
       unsafe {
-        (finalizer)(self.env as _, self.thread_finalize_data, ptr::null_mut());
+        (finalizer)(self.env as _, self.thread_finalize_data, self.context);
       }
     }
   }
diff --git a/tests/napi/src/tsfn.rs b/tests/napi/src/tsfn.rs
index dabc96f835a8da..a3a231cec19c12 100644
--- a/tests/napi/src/tsfn.rs
+++ b/tests/napi/src/tsfn.rs
@@ -46,6 +46,7 @@ fn create_custom_gc(env: sys::napi_env) {
     "Create async resource string in napi_register_module_v1 napi_register_module_v1"
   );
   let mut custom_gc_tsfn = ptr::null_mut();
+  let context = Box::into_raw(Box::new(0)) as *mut c_void;
   check_status_or_panic!(
     unsafe {
       sys::napi_create_threadsafe_function(
@@ -57,7 +58,7 @@ fn create_custom_gc(env: sys::napi_env) {
         1,
         ptr::null_mut(),
         Some(custom_gc_finalize),
-        ptr::null_mut(),
+        context,
         Some(custom_gc),
         &mut custom_gc_tsfn,
       )
@@ -80,8 +81,9 @@ unsafe extern "C" fn empty(
 unsafe extern "C" fn custom_gc_finalize(
   _env: sys::napi_env,
   _finalize_data: *mut c_void,
-  _finalize_hint: *mut c_void,
+  finalize_hint: *mut c_void,
 ) {
+  let _ = Box::from_raw(finalize_hint as *mut i32);
 }
 
 extern "C" fn custom_gc(