[libc-commits] [libc] [libc] Add aligned_alloc (PR #96586)

[via libc-commits]

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@@ -47,10 +48,16 @@ TEST_FOR_EACH_ALLOCATOR(CanAllocate, 2048) {
   void *ptr = allocator.allocate(ALLOC_SIZE);
 
   ASSERT_NE(ptr, static_cast<void *>(nullptr));
-  // In this case, the allocator should be returning us the start of the chunk.
-  EXPECT_EQ(ptr, static_cast<void *>(
-                     reinterpret_cast<cpp::byte *>(allocator.region_start()) +
-                     FreeListHeap<>::BlockType::BLOCK_OVERHEAD));
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PiJoules wrote:

>From the changes in this patch, this actually isn't always guaranteed now even for a fresh allocator since the new `MIN_ALLOCATION` is dependent on `max_align_t` which could be larger than the alignment for `BlockType`. In this case, the allocation may no longer be guaranteed to be the very first block.

https://github.com/llvm/llvm-project/pull/96586