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Don't dedupe signals less than SIGRTMIN

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FreeBSD always delivers all signals sent with sigqueue, except when
dealing with low memory conditions according to kib (see
bug # 212173 comment # 5).

In collaboration with:	kib
PR:	212173
Sponsored by:	EMC / Isilon Storage Division
This commit is contained in:
ngie 2016-09-03 00:47:54 +00:00
parent 8d51d635d5
commit 19d3dd9206
1 changed files with 18 additions and 0 deletions
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18
contrib/netbsd-tests/lib/libc/sys/t_sigqueue.c
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@ -151,6 +151,23 @@ sigorder(int *ordered, const int *tosend, size_t len)
if (len == 1)
return len;
#ifdef __FreeBSD__
/*
* Don't dedupe signal numbers (bug 212173)
*
* Per kib's comment..
*
* "
* OTOH, FreeBSD behaviour is to treat all signals as realtime while
* there is no mem shortage and siginfo can be allocated. In
* particular, signals < SIGRTMIN are not collapsed when queued more
* than once.
* "
*/
return len;
#else
size_t i, j;
for (i = 0, j = 0; i < len - 1; i++) {
if (ordered[i] >= SIGRTMIN)
@ -164,6 +181,7 @@ sigorder(int *ordered, const int *tosend, size_t len)
ordered[i + 1] = ordered[j];
}
return i + 1;
#endif
}
ATF_TC(sigqueue_rt);