src: dispose of V8 platform in `process.exit()`

Calling `process.exit()` calls the C `exit()` function, which in turn
calls the destructors of static C++ objects. This can lead to race
conditions with other concurrently executing threads; disposing of all
Worker threads and then the V8 platform instance helps with this
(although it might not be a full solution for all problems of
this kind).

Refs: https://github.com/nodejs/node/issues/24403
Refs: https://github.com/nodejs/node/issues/25007

PR-URL: https://github.com/nodejs/node/pull/25061
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>

3 files changed, 10 insertions, 2 deletions

diff --git a/src/env.cc b/src/env.cc
index d2d5d5bf35..50c718f9e9 100644
--- a/src/env.cc
+++ b/src/env.cc
@@ -859,10 +859,13 @@ void Environment::AsyncHooks::grow_async_ids_stack() {
 uv_key_t Environment::thread_local_env = {};
 
 void Environment::Exit(int exit_code) {
-  if (is_main_thread())
+  if (is_main_thread()) {
+    stop_sub_worker_contexts();
+    DisposePlatform();
     exit(exit_code);
-  else
+  } else {
     worker_context_->Exit(exit_code);
+  }
 }
 
 void Environment::stop_sub_worker_contexts() {
diff --git a/src/node.cc b/src/node.cc
index d5f3f4e6aa..7a585646f6 100644
--- a/src/node.cc
+++ b/src/node.cc
@@ -345,6 +345,10 @@ tracing::AgentWriterHandle* GetTracingAgentWriter() {
   return v8_platform.GetTracingAgentWriter();
 }
 
+void DisposePlatform() {
+  v8_platform.Dispose();
+}
+
 #ifdef __POSIX__
 static const unsigned kMaxSignal = 32;
 #endif
diff --git a/src/node_internals.h b/src/node_internals.h
index 0b0c97f8c8..fc27b384ec 100644
--- a/src/node_internals.h
+++ b/src/node_internals.h
@@ -345,6 +345,7 @@ int ThreadPoolWork::CancelWork() {
 }
 
 tracing::AgentWriterHandle* GetTracingAgentWriter();
+void DisposePlatform();
 
 static inline const char* errno_string(int errorno) {
 #define ERRNO_CASE(e)  case e: return #e;