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| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2021-01-29 17:07:28 +0000 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2021-03-26 11:03:06 +0000 |
| commit | c076a0bc698c537f72c33bad2925f4e3da59d23c (patch) | |
| tree | 188e36bfaa2c51ca50df2f1ef882a8fd57a61780 /sysdeps/generic | |
| parent | 42bac88a211a7fac9dd1bfe7d1e45e59ac50c24f (diff) | |
| download | glibc-c076a0bc698c537f72c33bad2925f4e3da59d23c.tar.gz | |
malloc: Only support zeroing and not arbitrary memset with mtag
The memset api is suboptimal and does not provide much benefit. Memory
tagging only needs a zeroing memset (and only for memory that's sized
and aligned to multiples of the tag granule), so change the internal
api and the target hooks accordingly. This is to simplify the
implementation of the target hook.
Reviewed-by: DJ Delorie <dj@redhat.com>
Diffstat (limited to 'sysdeps/generic')
| -rw-r--r-- | sysdeps/generic/libc-mtag.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/sysdeps/generic/libc-mtag.h b/sysdeps/generic/libc-mtag.h index e8fc236b6c..4743e873f1 100644 --- a/sysdeps/generic/libc-mtag.h +++ b/sysdeps/generic/libc-mtag.h @@ -44,12 +44,12 @@ __libc_mtag_tag_region (void *p, size_t n) return p; } -/* Optimized equivalent to __libc_mtag_tag_region followed by memset. */ +/* Optimized equivalent to __libc_mtag_tag_region followed by memset to 0. */ static inline void * -__libc_mtag_memset_with_tag (void *p, int c, size_t n) +__libc_mtag_tag_zero_region (void *p, size_t n) { __libc_mtag_link_error (); - return memset (p, c, n); + return memset (p, 0, n); } /* Convert address P to a pointer that is tagged correctly for that |