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lib: Avoid assertion if sig_ioctl is unsed from a child accidentally

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The timer is tied to the creator thread, i.e. it is not inheritable
across fork() or clone()/pthread_create(). Using it thus causes an
assertion failure in the test after the one that aborts (and so on until
we perform an interruptible test correctly) - one mistake snowballs. We
can stop the snowball by doing an initial check and diverting back to
drmIoctl().

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2016-04-03 09:51:49 +01:00
parent cb12d05e79
commit bd292436ed
1 changed files with 6 additions and 0 deletions
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6
lib/igt_aux.c
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@ -115,6 +115,12 @@ sig_ioctl(int fd, unsigned long request, void *arg)
SIG_ASSERT(__igt_sigiter.tid == gettid());
memset(&its, 0, sizeof(its));
if (timer_settime(__igt_sigiter.timer, 0, &its, NULL)) {
/* oops, we didn't undo the interrupter (i.e. !unwound abort) */
igt_ioctl = drmIoctl;
return drmIoctl(fd, request, arg);
}
its.it_value = __igt_sigiter.offset;
do {
long serial;