From c2f3d074e34eecce2bb7dc2cf11ef2d5d65c019d Mon Sep 17 00:00:00 2001
From: Feoramund <161657516+Feoramund@users.noreply.github.com>
Date: Thu, 19 Jun 2025 19:36:14 -0400
Subject: [PATCH] mem: Forbid construction of `Buddy_Allocator` with
 insufficient space

This takes into account eventual alignment.
---
 core/mem/allocators.odin | 1 +
 1 file changed, 1 insertion(+)

diff --git a/core/mem/allocators.odin b/core/mem/allocators.odin
index e3b96a8f7..a5a7d9951 100644
--- a/core/mem/allocators.odin
+++ b/core/mem/allocators.odin
@@ -2239,6 +2239,7 @@ buddy_allocator_init :: proc(b: ^Buddy_Allocator, data: []byte, alignment: uint,
 	b.head.is_free = true
 	b.tail = buddy_block_next(b.head)
 	b.alignment = alignment
+	assert(uint(len(data)) >= 2 * buddy_block_size_required(b, 1), "The size of the backing buffer must be large enough to hold at least two 1-byte allocations given the alignment requirements, otherwise it cannot split.", loc)
 	// sanitizer.address_poison(data)
 }