stress2: Added a regression test
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tools/test/stress2/misc/kevent16.sh
Executable file
92
tools/test/stress2/misc/kevent16.sh
Executable file
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#!/bin/sh
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# Bug 258310 - kevent() does not see signal with zero timeout
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# Test scenario copied from the bug report.
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# Fixed by: 98168a6e6c12 - main - kqueue: drain kqueue taskqueue if syscall tickled it
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cat > /tmp/kevent16.c <<EOF
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#ifdef NDEBUG
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#undef NDEBUG
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#endif
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#define _GNU_SOURCE
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#include <sys/types.h>
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#include <sys/event.h>
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#include <assert.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <poll.h>
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#include <unistd.h>
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int
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main(void)
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{
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long l;
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int rv;
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sigset_t set;
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rv = sigemptyset(&set);
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assert(rv == 0);
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rv = sigaddset(&set, SIGUSR1);
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assert(rv == 0);
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rv = sigprocmask(SIG_BLOCK, &set, NULL);
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assert(rv == 0);
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int skq = kqueue();
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assert(skq >= 0);
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struct kevent kev;
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EV_SET(&kev, SIGUSR1, EVFILT_SIGNAL, EV_ADD, 0, 0, 0);
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rv = kevent(skq, &kev, 1, NULL, 0, NULL);
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assert(rv == 0);
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int kq = kqueue();
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assert(kq >= 0);
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EV_SET(&kev, skq, EVFILT_READ, EV_ADD | EV_CLEAR, 0, 0, 0);
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rv = kevent(kq, &kev, 1, NULL, 0, NULL);
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assert(rv == 0);
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for (l = 0; l < 1000000; l++) {
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rv = kill(getpid(), SIGUSR1);
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assert(rv == 0);
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/* Turn this into `#if 1` to avoid the race. */
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#if 0
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rv = kevent(kq, NULL, 0, &kev, 1, NULL);
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#else
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rv = kevent(kq, NULL, 0, &kev, 1, &(struct timespec) { 0, 0 });
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#endif
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assert(rv == 1);
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rv = kevent(kq, NULL, 0, &kev, 1, &(struct timespec) { 0, 0 });
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assert(rv == 0);
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rv = kevent(skq, NULL, 0, &kev, 1, &(struct timespec) { 0, 0 });
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assert(rv == 1);
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rv = kevent(skq, NULL, 0, &kev, 1, &(struct timespec) { 0, 0 });
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assert(rv == 0);
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siginfo_t siginfo;
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rv = sigtimedwait(&set, &siginfo, &(struct timespec) { 0, 0 });
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assert(rv == SIGUSR1);
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rv = sigtimedwait(&set, &siginfo, &(struct timespec) { 0, 0 });
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assert(rv < 0);
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assert(errno == EAGAIN);
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}
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}
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EOF
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cc -o /tmp/kevent16 -Wall -Wextra -O2 /tmp/kevent16.c || exit 1
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/tmp/kevent16; s=$?
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rm -f /tmp/kevent16.c kevent16 kevent16.core
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exit $s
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