1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2019 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# "panic: vm_page_free_prep: freeing mapped page 0x657936c" seen. 31# https://people.freebsd.org/~pho/stress/log/sem_wait.txt 32# Fixed by r350005 33 34. ../default.cfg 35 36cat > /tmp/sem_wait.c <<EOF 37#include <sys/param.h> 38#include <sys/mman.h> 39#include <sys/stat.h> 40#include <sys/wait.h> 41 42#include <err.h> 43#include <pthread.h> 44#include <semaphore.h> 45#include <signal.h> 46#include <stdio.h> 47#include <stdlib.h> 48#include <string.h> 49#include <time.h> 50#include <unistd.h> 51 52static sem_t *semaphore; 53 54static void * 55test(void) { 56 57 setproctitle("%s", __func__); 58 alarm(300); 59 for (;;) { 60 if (sem_wait(semaphore) == -1) 61 err(1, "sem_wait"); 62 if (sem_post(semaphore) == -1) 63 err(1, "sem_post"); 64 } 65} 66 67int 68main(void) { 69 pid_t pid; 70 size_t len; 71 time_t start; 72 73 setproctitle("%s", __func__); 74 alarm(300); 75 len = PAGE_SIZE; 76 if ((semaphore = mmap(NULL, len, PROT_READ | PROT_WRITE, 77 MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) 78 err(1, "mmap"); 79 80 // initialize semaphore and set value to 1 81 if (sem_init(semaphore, 1, 1) == -1) 82 err(1, "sem_init"); 83 84 if ((pid = fork()) == 0) 85 test(); 86 if (pid == -1) 87 err(1, "fork()"); 88 89 usleep(50); 90 alarm(300); 91 start = time(NULL); 92 while (time(NULL) - start < 60) { 93 if (sem_wait(semaphore) == -1) 94 err(1, "sem_wait"); 95 if (sem_post(semaphore) == -1) 96 err(1, "sem_post"); 97 } 98 kill(pid, SIGHUP); 99 if (waitpid(pid, NULL, 0) != pid) 100 err(1, "waitpid()"); 101 102 return (0); 103} 104EOF 105mycc -o /tmp/sem_wait -Wall -Wextra -O2 /tmp/sem_wait.c || exit 1 106timeout 6m /tmp/sem_wait; s=$? 107[ $s -eq 124 ] && echo "Timed out" 108rm -f /tmp/sem_wait /tmp/sem_wait.c 109exit $s 110