18a272653SPeter Holm#!/bin/sh 28a272653SPeter Holm 38a272653SPeter Holm# 48a272653SPeter Holm# Copyright (c) 2009 Peter Holm <pho@FreeBSD.org> 58a272653SPeter Holm# All rights reserved. 68a272653SPeter Holm# 78a272653SPeter Holm# Redistribution and use in source and binary forms, with or without 88a272653SPeter Holm# modification, are permitted provided that the following conditions 98a272653SPeter Holm# are met: 108a272653SPeter Holm# 1. Redistributions of source code must retain the above copyright 118a272653SPeter Holm# notice, this list of conditions and the following disclaimer. 128a272653SPeter Holm# 2. Redistributions in binary form must reproduce the above copyright 138a272653SPeter Holm# notice, this list of conditions and the following disclaimer in the 148a272653SPeter Holm# documentation and/or other materials provided with the distribution. 158a272653SPeter Holm# 168a272653SPeter Holm# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 178a272653SPeter Holm# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 188a272653SPeter Holm# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 198a272653SPeter Holm# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 208a272653SPeter Holm# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 218a272653SPeter Holm# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 228a272653SPeter Holm# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 238a272653SPeter Holm# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 248a272653SPeter Holm# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 258a272653SPeter Holm# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 268a272653SPeter Holm# SUCH DAMAGE. 278a272653SPeter Holm# 288a272653SPeter Holm 298a272653SPeter Holm# Regression test for panic in semexit_myhook 308a272653SPeter Holm# Test scenario by kib@ 318a272653SPeter Holm 328a272653SPeter Holm. ../default.cfg 338a272653SPeter Holm 348a272653SPeter Holmodir=`pwd` 358a272653SPeter Holm 368a272653SPeter Holmcd /tmp 378a272653SPeter Holmsed '1,/^EOF/d' < $odir/$0 > sem.c 388a272653SPeter Holmmycc -o sem -Wall sem.c 398a272653SPeter Holmrm -f sem.c 408a272653SPeter Holm 418a272653SPeter Holmcd $RUNDIR/.. 428a272653SPeter Holmfor i in `jot 5`; do 438a272653SPeter Holm /tmp/sem& 448a272653SPeter Holmdone 458a272653SPeter Holmfor i in `jot 5`; do 468a272653SPeter Holm wait 478a272653SPeter Holmdone 488a272653SPeter Holm 498a272653SPeter Holmrm -f /tmp/sem 508a272653SPeter Holm 518a272653SPeter Holmexit 528a272653SPeter HolmEOF 538a272653SPeter Holm#include <stdio.h> 548a272653SPeter Holm#include <stdlib.h> 558a272653SPeter Holm#include <unistd.h> 568a272653SPeter Holm#include <sys/types.h> 578a272653SPeter Holm#include <sys/param.h> 588a272653SPeter Holm#include <sys/ipc.h> 598a272653SPeter Holm#include <sys/msg.h> 608a272653SPeter Holm#include <sys/shm.h> 618a272653SPeter Holm#include <sys/sem.h> 628a272653SPeter Holm#include <signal.h> 638a272653SPeter Holm#include <sys/wait.h> 648a272653SPeter Holm#include <sched.h> 658a272653SPeter Holm#include <errno.h> 668a272653SPeter Holm#include <err.h> 678a272653SPeter Holm 688a272653SPeter Holmint semid = -1; 698a272653SPeter Holmkey_t semkey; 708a272653SPeter Holmstruct sembuf sop[2]; 718a272653SPeter Holm 728a272653SPeter Holmsize_t pgsize; 738a272653SPeter Holmpid_t pid; 748a272653SPeter Holm 758a272653SPeter Holmvoid 768a272653SPeter Holmrandom_work(void) 778a272653SPeter Holm{ 788a272653SPeter Holm int i, n; 798a272653SPeter Holm 808a272653SPeter Holm n = (arc4random() % 5000) + 200; 818a272653SPeter Holm for (i = 0; i < n; i++) 828a272653SPeter Holm (void) getpid(); 838a272653SPeter Holm} 848a272653SPeter Holm 858a272653SPeter Holmint 868a272653SPeter Holmmain() 878a272653SPeter Holm{ 888a272653SPeter Holm int i, j, seed, status; 898a272653SPeter Holm 908a272653SPeter Holm seed = getpid(); 918a272653SPeter Holm semkey = ftok("/", seed); 928a272653SPeter Holm 938a272653SPeter Holm for (i = 0; i < 5000; i++) { 948a272653SPeter Holm 958a272653SPeter Holm pid = fork(); 968a272653SPeter Holm if (pid == -1) { 978a272653SPeter Holm perror("fork"); 988a272653SPeter Holm exit(2); 998a272653SPeter Holm } 1008a272653SPeter Holm 1018a272653SPeter Holm if (pid == 0) { /* child */ 1028a272653SPeter Holm j = 0; 1038a272653SPeter Holm /* get sem */ 1048a272653SPeter Holm do { 1058a272653SPeter Holm sched_yield(); 1068a272653SPeter Holm semid = semget(semkey, 0, 0); 1078a272653SPeter Holm } while (semid == -1 && j++ < 10000); 1088a272653SPeter Holm if (semid == -1) 1098a272653SPeter Holm exit(1); 1108a272653SPeter Holm 1118a272653SPeter Holm /* 1128a272653SPeter Holm * Attempt to acquire the semaphore. 1138a272653SPeter Holm */ 1148a272653SPeter Holm sop[0].sem_num = 0; 1158a272653SPeter Holm sop[0].sem_op = -1; 1168a272653SPeter Holm sop[0].sem_flg = SEM_UNDO; 1178a272653SPeter Holm 1188a272653SPeter Holm semop(semid, sop, 1); 1198a272653SPeter Holm random_work(); 1208a272653SPeter Holm _exit(0); 1218a272653SPeter Holm 1228a272653SPeter Holm } else { /* parent */ 1238a272653SPeter Holm /* create sem */ 1248a272653SPeter Holm if ((semid = semget(semkey, 1, IPC_CREAT | 010640)) == -1) 1258a272653SPeter Holm err(1, "semget (%s:%d)", __FILE__, __LINE__); 1268a272653SPeter Holm usleep(2000); 1278a272653SPeter Holm 1288a272653SPeter Holm sop[0].sem_num = 0; 1298a272653SPeter Holm sop[0].sem_op = 1; 1308a272653SPeter Holm sop[0].sem_flg = 0; 1318a272653SPeter Holm if (semop(semid, sop, 1) == -1) 1328a272653SPeter Holm warn("init: semop (%s:%d)", __FILE__, __LINE__); 1338a272653SPeter Holm 1348a272653SPeter Holm random_work(); 1358a272653SPeter Holm if (semctl(semid, 0, IPC_RMID, 0) == -1 && errno != EINVAL) 1368a272653SPeter Holm warn("shmctl IPC_RMID (%s:%d)", __FILE__, __LINE__); 1378a272653SPeter Holm 1388a272653SPeter Holm } 1398a272653SPeter Holm waitpid(pid, &status, 0); 1408a272653SPeter Holm } 1418a272653SPeter Holm return (0); 1428a272653SPeter Holm} 143