1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2018 Dell EMC Isilon 7# 8# Redistribution and use in source and binary forms, with or without 9# modification, are permitted provided that the following conditions 10# are met: 11# 1. Redistributions of source code must retain the above copyright 12# notice, this list of conditions and the following disclaimer. 13# 2. Redistributions in binary form must reproduce the above copyright 14# notice, this list of conditions and the following disclaimer in the 15# documentation and/or other materials provided with the distribution. 16# 17# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27# SUCH DAMAGE. 28# 29 30# No problems seen. 31 32. ../default.cfg 33 34dir=/tmp 35odir=`pwd` 36cd $dir 37sed '1,/^EOF/d' < $odir/$0 > $dir/sigstop2.c 38mycc -o sigstop2 -Wall -Wextra -O0 -g sigstop2.c || exit 1 39rm -f sigstop2.c 40 41$dir/sigstop2 42s=$? 43[ -f sigstop2.core -a $s -eq 0 ] && 44 { ls -l sigstop2.core; mv sigstop2.core $dir; s=1; } 45 46rm -rf $dir/sigstop2 47exit $s 48 49EOF 50#include <sys/param.h> 51#include <sys/mman.h> 52#include <sys/stat.h> 53#include <sys/wait.h> 54 55#include <machine/atomic.h> 56 57#include <err.h> 58#include <errno.h> 59#include <fcntl.h> 60#include <signal.h> 61#include <stdio.h> 62#include <stdlib.h> 63#include <time.h> 64#include <unistd.h> 65 66static volatile u_int *share; 67 68#define N 100 69#define PARALLEL 4 70#define RUNTIME (1 * 60) 71#define SYNC 0 72 73static void 74test(void) 75{ 76 pid_t pids[N]; 77 int i; 78 79 atomic_add_int(&share[SYNC], 1); 80 while (share[SYNC] != PARALLEL) 81 ; 82 83 for (i = 0; i < N; i++) { 84 if ((pids[i] = fork()) == 0) { 85 for (;;) 86 pause(); 87 _exit(0); 88 } 89 } 90 91 for (i = 0; i < N; i++) 92 if (kill(pids[i], SIGSTOP) == -1) 93 err(1, "kill(%d)", pids[i]); 94 for (i = 0; i < N; i++) 95 if (kill(pids[i], SIGINT) == -1) 96 err(1, "kill(%d)", pids[i]); 97 for (i = 0; i < N; i++) 98 if (kill(pids[i], SIGKILL) == -1) 99 err(1, "kill(%d)", pids[i]); 100 for (i = 0; i < N; i++) 101 if (waitpid(pids[i], NULL, 0) != pids[i]) 102 err(1, "waitpid(%d)", pids[i]); 103 104 _exit(0); 105} 106 107int 108main(void) 109{ 110 pid_t pids[PARALLEL]; 111 size_t len; 112 time_t start; 113 int e, i, status; 114 115 e = 0; 116 len = PAGE_SIZE; 117 if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE, 118 MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) 119 err(1, "mmap"); 120 121 start = time(NULL); 122 while ((time(NULL) - start) < RUNTIME && e == 0) { 123 share[SYNC] = 0; 124 for (i = 0; i < PARALLEL; i++) { 125 if ((pids[i] = fork()) == 0) 126 test(); 127 if (pids[i] == -1) 128 err(1, "fork()"); 129 } 130 for (i = 0; i < PARALLEL; i++) { 131 if (waitpid(pids[i], &status, 0) == -1) 132 err(1, "waitpid(%d)", pids[i]); 133 if (status != 0) { 134 if (WIFSIGNALED(status)) 135 fprintf(stderr, 136 "pid %d exit signal %d\n", 137 pids[i], WTERMSIG(status)); 138 } 139 e += status == 0 ? 0 : 1; 140 } 141 } 142 143 return (e); 144} 145