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Fix in-place expansion of wide slabs

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This commit is contained in:
Feoramund
2025-03-28 19:50:16 -04:00
parent 8638bd3b89
commit 44a7015609
1 changed files with 5 additions and 1 deletions
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6
base/runtime/heap_allocator_implementation.odin
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@@ -1822,6 +1822,7 @@ heap_resize :: proc "contextless" (old_ptr: rawptr, old_size: int, new_size: int
}
superpage.next_free_slab_index = min(superpage.next_free_slab_index, slab.index + contiguous_new)
superpage.free_slabs += contiguous_old - contiguous_new
slab.bin_size = new_size
if previously_full_superpage {
heap_cache_add_superpage_with_free_slabs(superpage)
heap_debug_cover(.Superpage_Added_To_Open_Cache_By_Resizing_Wide_Slab)
@@ -1847,6 +1848,10 @@ heap_resize :: proc "contextless" (old_ptr: rawptr, old_size: int, new_size: int
heap_slab_clear_data(next_slab)
}
}
// We must update the slab's `bin_size` before calling
// `heap_update_next_free_slab`, as that procedure will need to
// iterate over the slabs.
slab.bin_size = new_size
superpage.free_slabs += contiguous_old - contiguous_new
if superpage.free_slabs == 0 {
heap_cache_remove_superpage_with_free_slabs(superpage)
@@ -1857,7 +1862,6 @@ heap_resize :: proc "contextless" (old_ptr: rawptr, old_size: int, new_size: int
}
// The slab-wide allocation has been resized in-place.
slab.bin_size = new_size
return old_ptr
}