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LibJS: Expose minimum possible cell size of JS::Heap

Use this to avoid creating a 16 byte cell allocator on x86_64, where the
size of FreelistEntry is 24 bytes. Every JS::Cell must be at least the
size of the FreelistEntry or things start crashing, so the 16 byte
allocator was wasted on that platform.
This commit is contained in:
Andrew Kaster 2021-05-29 06:24:30 -06:00 committed by Linus Groh
parent 07c62f9f42
commit 81a5dcde84
2 changed files with 7 additions and 1 deletions

View file

@ -101,6 +101,9 @@ private:
size_t m_next_lazy_freelist_index { 0 };
FreelistEntry* m_freelist { nullptr };
alignas(Cell) u8 m_storage[];
public:
static constexpr size_t min_possible_cell_size = sizeof(FreelistEntry);
};
}