1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5# 6# Copyright (c) 2022 Peter Holm 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# Regression test for D36069 31# thread_create(): call cpu_copy_thread() after td_pflags is zeroed 32 33# Seen before fix: 34# cc: error: unable to execute command: Segmentation fault (core dumped) 35# cc: error: linker command failed due to signal (use -v to see invocation) 36# Aug 9 18:27:47 freebsd-vm kernel: pid 32094 (ld.lld), jid 0, uid 0: exited on signal 11 (core dumped) 37 38. ../default.cfg 39[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1 40 41dir=/tmp 42odir=`pwd` 43cd $dir 44sed '1,/^EOF/d' < $odir/$0 > $dir/fork2.c 45mycc -o fork2 -Wall -Wextra -O0 -g fork2.c || exit 1 46cd $odir 47 48set -e 49mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint 50[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart 51mdconfig -a -t swap -s 2g -u $mdstart 52bsdlabel -w md$mdstart auto 53newfs $newfs_flags md${mdstart}$part > /dev/null 54mount /dev/md${mdstart}$part $mntpoint 55set +e 56 57cd $mntpoint 58$dir/fork2 59s=$? 60pkill fork2 61[ -f fork2.core -a $s -eq 0 ] && 62 { ls -l fork2.core; mv fork2.core $dir; s=1; } 63cd $odir 64 65for i in `jot 6`; do 66 mount | grep -q "on $mntpoint " || break 67 umount $mntpoint && break || sleep 10 68 [ $i -eq 6 ] && 69 { echo FATAL; fstat -mf $mntpoint; exit 1; } 70done 71mdconfig -d -u $mdstart 72cd $dir 73mycc -o $dir/fork2 -Wall -Wextra -O0 -g $dir/fork2.c; s=$? 74rm -rf $dir/fork2 $dir/fork2.c 75exit $s 76 77EOF 78#include <sys/param.h> 79#include <sys/mman.h> 80#include <sys/stat.h> 81#include <sys/wait.h> 82 83#include <machine/atomic.h> 84 85#include <err.h> 86#include <errno.h> 87#include <fcntl.h> 88#include <signal.h> 89#include <stdio.h> 90#include <stdlib.h> 91#include <time.h> 92#include <unistd.h> 93 94static volatile u_int *share; 95 96#define MX 5000 97#define RUNTIME (1 * 60) 98#define SYNC 0 99 100int 101main(void) 102{ 103 pid_t pid; 104 size_t len; 105 time_t start; 106 int n; 107 108 len = PAGE_SIZE; 109 if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE, 110 MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) 111 err(1, "mmap"); 112 113 n = 0; 114 signal(SIGCHLD, SIG_IGN); 115 start = time(NULL); 116 while ((time(NULL) - start) < RUNTIME) { 117 while ((atomic_load_int(&share[SYNC])) > MX) 118 usleep(100); 119 n++; 120 pid = fork(); 121 if (pid == -1) 122 err(1, "fork)"); 123 if (pid == 0) { 124 atomic_add_int(&share[SYNC], 1); 125 while (atomic_load_int(&share[SYNC]) <= MX) 126 usleep(10000); 127 usleep(arc4random() % 1000); 128 atomic_add_int(&share[SYNC], -1); 129 raise(SIGHUP); 130 _exit(0); 131 } 132 } 133 atomic_add_int(&share[SYNC], MX * 2); 134 fprintf(stderr, "%d fork() calls\n", n); 135} 136