Merged: [debug] Disable debug events if JS execution is disallowed

src/debug/debug.cc

Index: src/debug/debug.cc
diff --git a/src/debug/debug.cc b/src/debug/debug.cc
index e04695771bf1f1c7755832ad10c240853a56ad6a..cce167f942934f1254a71dd4494b2e35b7c8ceea 100644
--- a/src/debug/debug.cc
+++ b/src/debug/debug.cc
@@ -1701,6 +1701,11 @@ MaybeHandle<Object> Debug::PromiseHasUserDefinedRejectHandler(
 
 
 void Debug::OnException(Handle<Object> exception, Handle<Object> promise) {
+  // We cannot generate debug events when JS execution is disallowed.
+  // TODO(5530): Reenable debug events within DisallowJSScopes once relevant
+  // code (MakeExceptionEvent and ProcessDebugEvent) have been moved to C++.
+  if (!AllowJavascriptExecution::IsAllowed(isolate_)) return;
+
   Isolate::CatchType catch_type = isolate_->PredictExceptionCatcher();
 
   // Don't notify listener of exceptions that are internal to a desugaring.