From 56bc55bdfb3f3a8e0083ce9a3f25df43bc12548b Mon Sep 17 00:00:00 2001
From: Andrew McCreight <continuation@gmail.com>
Date: Tue, 17 Dec 2013 19:29:57 -0800
Subject: [PATCH] Bug 937818, part 2 - Add js::ZoneGlobalsAreAllGray. r=jonco

If all globals in a zone are gray, then all live objects in that zone
should also be gray.
---
 js/src/jsfriendapi.cpp | 11 +++++++++++
 js/src/jsfriendapi.h   |  3 +++
 2 files changed, 14 insertions(+)

diff --git a/js/src/jsfriendapi.cpp b/js/src/jsfriendapi.cpp
index e62b9dec3781..ff0a433c8033 100644
--- a/js/src/jsfriendapi.cpp
+++ b/js/src/jsfriendapi.cpp
@@ -647,6 +647,17 @@ js::AreGCGrayBitsValid(JSRuntime *rt)
     return rt->gcGrayBitsValid;
 }
 
+JS_FRIEND_API(bool)
+js::ZoneGlobalsAreAllGray(JS::Zone *zone)
+{
+    for (CompartmentsInZoneIter comp(zone); !comp.done(); comp.next()) {
+        JSObject *obj = comp->maybeGlobal();
+        if (!obj || !JS::GCThingIsMarkedGray(obj))
+            return false;
+    }
+    return true;
+}
+
 JS_FRIEND_API(JSGCTraceKind)
 js::GCThingTraceKind(void *thing)
 {
diff --git a/js/src/jsfriendapi.h b/js/src/jsfriendapi.h
index 6e41232400cb..4c5d113d2d34 100644
--- a/js/src/jsfriendapi.h
+++ b/js/src/jsfriendapi.h
@@ -339,6 +339,9 @@ TraceWeakMaps(WeakMapTracer *trc);
 extern JS_FRIEND_API(bool)
 AreGCGrayBitsValid(JSRuntime *rt);
 
+extern JS_FRIEND_API(bool)
+ZoneGlobalsAreAllGray(JS::Zone *zone);
+
 typedef void
 (*GCThingCallback)(void *closure, void *gcthing);