src: add can_call_into_js flag

This prevents calls back into JS from the shutdown phase.

Many thanks for Stephen Belanger for reviewing the original version of
this commit in the Ayo.js project.

Refs: https://github.com/ayojs/ayo/pull/82
PR-URL: https://github.com/nodejs/node/pull/19377
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/node_contextify.cc b/src/node_contextify.cc
index 4db82d4d7ca..23582454cd6 100644
--- a/src/node_contextify.cc
+++ b/src/node_contextify.cc
@@ -820,6 +820,8 @@ class ContextifyScript : public BaseObject {
                           const bool display_errors,
                           const bool break_on_sigint,
                           const FunctionCallbackInfo<Value>& args) {
+    if (!env->can_call_into_js())
+      return false;
     if (!ContextifyScript::InstanceOf(env, args.Holder())) {
       env->ThrowTypeError(
           "Script methods can only be called on script instances.");