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Call the relevant scope-data constructor when allocating it, and poison/mark as undefined the memory for the trailing array of BindingNames, ratther than impermissibly PodZero-ing non-trivial classes.

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trav90 2018-09-02 18:59:51 -05:00 • committed by Roy Tam
commit 78d0ec7fc9
4 changed files with 72 additions and 31 deletions
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4
js/src/vm/Scope.cpp
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@ -191,12 +191,12 @@ template <typename ConcreteScope>
static UniquePtr<typename ConcreteScope::Data>
NewEmptyScopeData(ExclusiveContext* cx, uint32_t length = 0)
{
uint8_t* bytes = cx->zone()->pod_calloc<uint8_t>(ConcreteScope::sizeOfData(length));
uint8_t* bytes = cx->zone()->pod_malloc<uint8_t>(ConcreteScope::sizeOfData(length));
if (!bytes)
ReportOutOfMemory(cx);
auto data = reinterpret_cast<typename ConcreteScope::Data*>(bytes);
if (data)
new (data) typename ConcreteScope::Data();
new (data) typename ConcreteScope::Data(length);
return UniquePtr<typename ConcreteScope::Data>(data);
}