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Restore logic to increase fixed slot count for object types which have had slot arrays allocated, bug 693221.

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This commit is contained in:
Brian Hackett 2011-10-29 17:03:59 -07:00
parent a94b1b5173
commit 0470c56a60
1 changed files with 21 additions and 0 deletions
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21
js/src/jsobj.cpp
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@ -4674,6 +4674,27 @@ JSObject::growSlots(JSContext *cx, uint32 oldCount, uint32 newCount)
size_t oldSize = Probes::objectResizeActive() ? slotsAndStructSize() : 0;
size_t newSize = oldSize + (newCount - oldCount) * sizeof(Value);
/*
* If we are allocating slots for an object whose type is always created
* by calling 'new' on a particular script, bump the GC kind for that
* type to give these objects a larger number of fixed slots when future
* objects are constructed.
*/
if (!hasLazyType() && !oldCount && type()->newScript) {
gc::AllocKind kind = type()->newScript->allocKind;
unsigned newScriptSlots = gc::GetGCKindSlots(kind);
if (newScriptSlots == numFixedSlots() && gc::TryIncrementAllocKind(&kind)) {
JSObject *obj = NewReshapedObject(cx, type(), getParent(), kind,
type()->newScript->shape);
if (!obj)
return false;
type()->newScript->allocKind = kind;
type()->newScript->shape = obj->lastProperty();
type()->markStateChange(cx);
}
}
if (!oldCount) {
slots = (Value *) cx->malloc_(newCount * sizeof(Value));
if (!slots)