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Message-ID: <e32b1534-009b-1d8e-dd9c-6f5a3bb71d3a@oracle.com>
Date: Thu, 25 Feb 2021 11:22:32 -0800
From: Alan Coopersmith <alan.coopersmith@...cle.com>
To: libc-coord@...ts.openwall.com, David Goldblatt <davidtgoldblatt@...il.com>
Subject: Re: Sized deallocation for C
On 2/25/21 10:59 AM, David Goldblatt wrote:
> Current Sized-Deallocation Support
The libumem library included with Solaris and illumos as a user-space
implementation of the kernel's slab allocator also does this, requiring
the size be specified in calls to umem_free:
https://docs.oracle.com/cd/E88353_01/html/E37843/umem-free-3malloc.html
https://www.usenix.org/conference/2001-usenix-annual-technical-conference/magazines-and-vmem-extending-slab-allocator-many
> 5. Implementations may provide extensions to query the usable size of an allocation
Implementations that don't already do this and are thinking of adding it
should consider the fairly common malloc_usable_size() API, already found
in the GNU, FreeBSD, and Solaris libc implementations.
--
-Alan Coopersmith- alan.coopersmith@...cle.com
Oracle Solaris Engineering - https://blogs.oracle.com/alanc
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