1 files changed, 11 insertions, 0 deletions
diff --git a/js/src/builtin/ModuleObject.cpp b/js/src/builtin/ModuleObject.cpp
index b9db9bf02d..0365f744a6 100644
--- a/js/src/builtin/ModuleObject.cpp
+++ b/js/src/builtin/ModuleObject.cpp
@@ -1109,6 +1109,17 @@ JSScript* ModuleObject::script() const {
   return ptr;
 }
 
+const char* ModuleObject::filename() const {
+  // The ScriptSlot will be cleared once the module is evaluated, so we try to
+  // get the filename from cyclicModuleFields().
+
+  // TODO: Bug 1885483: Provide filename for JSON modules
+  if (!hasCyclicModuleFields()) {
+    return "(JSON module)";
+  }
+  return cyclicModuleFields()->scriptSourceObject->source()->filename();
+}
+
 static inline void AssertValidModuleStatus(ModuleStatus status) {
   MOZ_ASSERT(status >= ModuleStatus::Unlinked &&
              status <= ModuleStatus::Evaluated_Error);