Bug 433529: Part 6 - Add JS_GetFunctionDisplayId as a jsapi function for a JSFunction's displayAtom. r=jimb

js/src/jsapi.cpp

@@ -4924,6 +4924,12 @@ JS_GetFunctionId(JSFunction *fun)
     return fun->atom();
 }
 
+JS_PUBLIC_API(JSString *)
+JS_GetFunctionDisplayId(JSFunction *fun)
+{
+    return fun->displayAtom();
+}
+
 JS_PUBLIC_API(unsigned)
 JS_GetFunctionFlags(JSFunction *fun)
 {

js/src/jsapi.h

@@ -4974,6 +4974,16 @@ JS_GetFunctionObject(JSFunction *fun);
 extern JS_PUBLIC_API(JSString *)
 JS_GetFunctionId(JSFunction *fun);
 
+/*
+ * Return a function's display name. This is the defined name if one was given
+ * where the function was defined, or it could be an inferred name by the JS
+ * engine in the case that the function was defined to be anonymous. This can
+ * still return NULL if a useful display name could not be inferred. The same
+ * restrictions on rooting as those in JS_GetFunctionId apply.
+ */
+extern JS_PUBLIC_API(JSString *)
+JS_GetFunctionDisplayId(JSFunction *fun);
+
 /*
  * Return JSFUN_* flags for fun.
  */