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Bug 957542 - Set minimum slots of ArrayObject to 2 to fix GGC, r=jandem

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This commit is contained in:
Hannes Verschore 2014-02-10 14:22:36 +01:00
parent 1ad706b831
commit 4c5e3939e4
2 changed files with 3 additions and 0 deletions
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2
js/src/vm/ObjectImpl.cpp
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@ -365,6 +365,8 @@ js::ObjectImpl::dynamicSlotsCount(uint32_t nfixed, uint32_t span, const Class *c
// this because slots are uncommon in that case.
if (clasp != &ArrayObject::class_ && span <= SLOT_CAPACITY_MIN)
return SLOT_CAPACITY_MIN;
if (clasp == &ArrayObject::class_ && span <= SLOT_CAPACITY_ARRAYOBJECT_MIN)
return SLOT_CAPACITY_ARRAYOBJECT_MIN;
uint32_t slots = mozilla::RoundUpPow2(span);
MOZ_ASSERT(slots >= span);

1
js/src/vm/ObjectImpl.h
View File

@ -1155,6 +1155,7 @@ class ObjectImpl : public gc::BarrieredCell<ObjectImpl>
* since they normally don't have a lot of slots.
*/
static const uint32_t SLOT_CAPACITY_MIN = 8;
static const uint32_t SLOT_CAPACITY_ARRAYOBJECT_MIN = 2;
HeapSlot *fixedSlots() const {
return reinterpret_cast<HeapSlot *>(uintptr_t(this) + sizeof(ObjectImpl));