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LibJS: Defer GC during cell construction

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This stops us from trying to collect not fully constructed Cells,
which's vtables are not fully initialized, which would cause issues
during GC.
This commit is contained in:
Hendiadyoin1 2023-09-23 13:47:16 +02:00 • committed by Andreas Kling
parent 87e063db65
commit 12c6692611
Notes: sideshowbarker 2024-07-17 03:27:40 +09:00
1 changed files with 4 additions and 0 deletions
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4
Userland/Libraries/LibJS/Heap/Heap.h
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@ -39,7 +39,9 @@ public:
NonnullGCPtr<T> allocate_without_realm(Args&&... args)
{
auto* memory = allocate_cell(sizeof(T));
defer_gc();
new (memory) T(forward<Args>(args)...);
undefer_gc();
return *static_cast<T*>(memory);
}
@ -47,7 +49,9 @@ public:
NonnullGCPtr<T> allocate(Realm& realm, Args&&... args)
{
auto* memory = allocate_cell(sizeof(T));
defer_gc();
new (memory) T(forward<Args>(args)...);
undefer_gc();
auto* cell = static_cast<T*>(memory);
memory->initialize(realm);
return *cell;