diff options
Diffstat (limited to 'core/mem/rollback_stack_allocator.odin')
| -rw-r--r-- | core/mem/rollback_stack_allocator.odin | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/core/mem/rollback_stack_allocator.odin b/core/mem/rollback_stack_allocator.odin index a3f6647cf..b86f514ec 100644 --- a/core/mem/rollback_stack_allocator.odin +++ b/core/mem/rollback_stack_allocator.odin @@ -155,7 +155,11 @@ rb_resize :: proc(stack: ^Rollback_Stack, ptr: rawptr, old_size, size, alignment assert(block.offset >= cast(uintptr)old_size, "Rollback Stack Allocator received invalid `old_size`.") if block.offset + cast(uintptr)size - cast(uintptr)old_size < cast(uintptr)len(block.buffer) { - block.offset += cast(uintptr)size - cast(uintptr)old_size + // Prevent singleton allocations from fragmenting by forbidding + // them to shrink, removing the possibility of overflow bugs. + if len(block.buffer) <= stack.block_size { + block.offset += cast(uintptr)size - cast(uintptr)old_size + } #no_bounds_check return (cast([^]byte)ptr)[:size], nil } } |