tree 7e194615cf3beeeb43b041f7cbb5d7f914a81709
parent 5937b7f9d123e6b01064fdb488d6c96d28d99a75
author Abseil Team <absl-team@google.com> 1663605000 -0700
committer Copybara-Service <copybara-worker@google.com> 1663605043 -0700

Make BTrees work with custom allocators that recycle memory.

The btree data structure poisons regions of memory it's not using. It leaves
these regions poisoned when it frees memory. This means that a custom memory
allocator that tries to reuse freed memory will trigger an ASAN
use-after-poison error.

The fix is to unpoison each memory region right before freeing it.

PiperOrigin-RevId: 475309671
Change-Id: I29d55c298d3d89a83e1f960deb6e93118891ff83