Revision: 17740
Author: [email protected]
Date: Thu Nov 14 11:56:03 2013 UTC
Log: Avoid integer overflow in CopyMap.
[email protected]
Review URL: https://chromiumcodereview.appspot.com/63173023
http://code.google.com/p/v8/source/detail?r=17740
Modified:
/branches/bleeding_edge/src/factory.cc
=======================================
--- /branches/bleeding_edge/src/factory.cc Wed Nov 13 10:34:06 2013 UTC
+++ /branches/bleeding_edge/src/factory.cc Thu Nov 14 11:56:03 2013 UTC
@@ -626,11 +626,12 @@
int instance_size_delta = extra_inobject_properties * kPointerSize;
int max_instance_size_delta =
JSObject::kMaxInstanceSize - copy->instance_size();
- if (instance_size_delta > max_instance_size_delta) {
+ int max_extra_properties = max_instance_size_delta >> kPointerSizeLog2;
+ if (extra_inobject_properties > max_extra_properties) {
// If the instance size overflows, we allocate as many properties
// as we can as inobject properties.
instance_size_delta = max_instance_size_delta;
- extra_inobject_properties = max_instance_size_delta >>
kPointerSizeLog2;
+ extra_inobject_properties = max_extra_properties;
}
// Adjust the map with the extra inobject properties.
int inobject_properties =
--
--
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