160 lines
3.5 KiB
Bash
Executable File
160 lines
3.5 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2017 Dell EMC Isilon
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# Hunt for lost wakeup problem.
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. ../default.cfg
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dir=/tmp
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odir=`pwd`
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cd $dir
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sed '1,/^EOF/d' < $odir/$0 > $dir/pause.c
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mycc -o pause -Wall -Wextra -O0 -g pause.c || exit 1
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rm -f pause.c
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pkill pause
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$dir/pause &
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pid=$!
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start=`date +%s`
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while pgrep -q pause; do
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sleep .5
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[ $((`date +%s` - $start)) -gt 1200 ] &&
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{ echo "Timed out"; pgrep pause | xargs ps -lp; exit 1; }
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done
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wait $pid
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s=$?
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cd $odir
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rm -rf $dir/pause
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exit $s
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EOF
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#include <sys/param.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <machine/atomic.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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static volatile u_int *share;
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#define PARALLEL 400
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#define RUNTIME (5 * 60)
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#define SYNC 0
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void
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hand(int i __unused) {
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}
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static void
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test(int idx)
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{
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pid_t pid;
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time_t start;
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atomic_add_int(&share[SYNC], 1);
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while (share[SYNC] != PARALLEL)
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usleep(1);
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share[idx] = 0;
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if ((pid = fork()) == 0) {
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share[idx] = 1;
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for (;;)
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pause();
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_exit(0);
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}
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while (share[idx] == 0)
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usleep(10);
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start = time(NULL);
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while (time(NULL) - start < 60) {
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usleep(arc4random() % 100);
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if (kill(pid, SIGHUP) == -1)
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err(1, "kill(%d)", pid);
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}
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kill(pid, SIGTERM);
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if (waitpid(pid, NULL, 0) != pid)
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err(1, "waitpid(%d)", pid);
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_exit(0);
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}
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int
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main(void)
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{
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pid_t pids[PARALLEL];
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struct sigaction sa;
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size_t len;
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time_t start;
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int e, i, status;
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sa.sa_handler = hand;
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = 0;
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if (sigaction(SIGHUP, &sa, NULL) == -1)
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err(1, "sigaction");
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e = 0;
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len = PAGE_SIZE;
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if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
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MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
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err(1, "mmap");
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start = time(NULL);
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while ((time(NULL) - start) < RUNTIME && e == 0) {
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share[SYNC] = 0;
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for (i = 0; i < PARALLEL; i++) {
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if ((pids[i] = fork()) == 0)
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test(i + 1);
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if (pids[i] == -1)
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err(1, "fork()");
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}
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for (i = 0; i < PARALLEL; i++) {
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if (waitpid(pids[i], &status, 0) == -1)
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err(1, "waitpid(%d)", pids[i]);
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if (status != 0) {
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if (WIFSIGNALED(status))
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fprintf(stderr,
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"pid %d exit signal %d\n",
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pids[i], WTERMSIG(status));
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}
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e += status == 0 ? 0 : 1;
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}
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}
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return (e);
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}
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