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| author |   deraadt <deraadt@openbsd.org> | 2017-03-17 17:00:38 +0000 |
|---|---|---|
| committer | deraadt <deraadt@openbsd.org> | 2017-03-17 17:00:38 +0000 |
| commit | ba61a52ad7bdc0f92bf756c452f0de45ab7edc59 (patch) | |
| tree | b158eb72d0ae6f80b899955d48dcc4be6bfb47e5 /lib/libc/stdlib/malloc.3 | |
| parent | various tweaks; ok rzalamena (diff) | |
| download | wireguard-openbsd-ba61a52ad7bdc0f92bf756c452f0de45ab7edc59.tar.xz wireguard-openbsd-ba61a52ad7bdc0f92bf756c452f0de45ab7edc59.zip | |
Strengthen description of recallocarray(3) behaviour, hoping that readers
make the behaviour -> use case connection.
help from jmc and jsing
Diffstat (limited to 'lib/libc/stdlib/malloc.3')
| -rw-r--r-- | lib/libc/stdlib/malloc.3 | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/lib/libc/stdlib/malloc.3 b/lib/libc/stdlib/malloc.3 index e24a811bec3..0053748991a 100644 --- a/lib/libc/stdlib/malloc.3 +++ b/lib/libc/stdlib/malloc.3 @@ -30,9 +30,9 @@ .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" -.\" $OpenBSD: malloc.3,v 1.103 2017/03/07 06:07:50 otto Exp $ +.\" $OpenBSD: malloc.3,v 1.104 2017/03/17 17:00:38 deraadt Exp $ .\" -.Dd $Mdocdate: March 7 2017 $ +.Dd $Mdocdate: March 17 2017 $ .Dt MALLOC 3 .Os .Sh NAME @@ -119,9 +119,14 @@ The .Fn recallocarray function is similar to .Fn reallocarray -except that it takes care of clearing newly allocated memory. -Additionally, the memory that becomes unallocated while shrinking -or moving existing allocations is erased. +except it ensures newly allocated memory is cleared similar to +.Xr calloc 3 . +Memory that becomes unallocated while shrinking or moving existing +allocations is explicitly discarded (meaning, pages of memory +are disposed via +.Xr munmap 2 , +and smaller allocations are cleared with +.Xr explicit_bzero 3 Ns ). If .Fa ptr is a |