From 90921b63a02fa1c62b643bf548ab646f4b98c4f7 Mon Sep 17 00:00:00 2001
From: Boris Zbarsky <bzbarsky@mit.edu>
Date: Tue, 14 May 2013 14:17:09 -0400
Subject: [PATCH] Bug 872043.  Add an API for getting the canonical
 Array.prototype for a global.  r=waldo

---
 js/src/jsapi.cpp | 8 ++++++++
 js/src/jsapi.h   | 7 +++++++
 2 files changed, 15 insertions(+)

diff --git a/js/src/jsapi.cpp b/js/src/jsapi.cpp
index 49961dc2bce..c57570640c1 100644
--- a/js/src/jsapi.cpp
+++ b/js/src/jsapi.cpp
@@ -2242,6 +2242,14 @@ JS_GetFunctionPrototype(JSContext *cx, JSObject *forObj)
     return forObj->global().getOrCreateFunctionPrototype(cx);
 }
 
+JS_PUBLIC_API(JSObject *)
+JS_GetArrayPrototype(JSContext *cx, JSObject *forObj)
+{
+    CHECK_REQUEST(cx);
+    assertSameCompartment(cx, forObj);
+    return forObj->global().getOrCreateArrayPrototype(cx);
+}
+
 JS_PUBLIC_API(JSObject *)
 JS_GetGlobalForObject(JSContext *cx, JSObject *obj)
 {
diff --git a/js/src/jsapi.h b/js/src/jsapi.h
index 1a7a431cc68..8a2588f0d4e 100644
--- a/js/src/jsapi.h
+++ b/js/src/jsapi.h
@@ -2159,6 +2159,13 @@ JS_GetFunctionPrototype(JSContext *cx, JSObject *forObj);
 extern JS_PUBLIC_API(JSObject *)
 JS_GetObjectPrototype(JSContext *cx, JSObject *forObj);
 
+/*
+ * Returns the original value of |Array.prototype| from the global object in
+ * which |forObj| was created.
+ */
+extern JS_PUBLIC_API(JSObject *)
+JS_GetArrayPrototype(JSContext *cx, JSObject *forObj);
+
 extern JS_PUBLIC_API(JSObject *)
 JS_GetGlobalForObject(JSContext *cx, JSObject *obj);