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 a99ea3f15c7f6f209dc1032515cf9dd5f49f5b5e..5323c13a90902ed4e7d2f033e53cff481a47458f 100644
--- a/src/debug/debug.cc
+++ b/src/debug/debug.cc
@@ -1697,6 +1697,11 @@ void Debug::OnPromiseReject(Handle<Object> promise, Handle<Object> value) {
 
 
 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.