1#!/bin/sh 2 3# 4# SPDX-License-Identifier: BSD-2-Clause 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 52newfs $newfs_flags md$mdstart > /dev/null 53mount /dev/md$mdstart $mntpoint 54set +e 55 56cd $mntpoint 57$dir/fork2 58s=$? 59pkill fork2 60[ -f fork2.core -a $s -eq 0 ] && 61 { ls -l fork2.core; mv fork2.core $dir; s=1; } 62cd $odir 63 64for i in `jot 6`; do 65 mount | grep -q "on $mntpoint " || break 66 umount $mntpoint && break || sleep 10 67 [ $i -eq 6 ] && 68 { echo FATAL; fstat -mf $mntpoint; exit 1; } 69done 70mdconfig -d -u $mdstart 71cd $dir 72mycc -o $dir/fork2 -Wall -Wextra -O0 -g $dir/fork2.c; s=$? 73rm -rf $dir/fork2 $dir/fork2.c 74exit $s 75 76EOF 77#include <sys/param.h> 78#include <sys/mman.h> 79#include <sys/stat.h> 80#include <sys/wait.h> 81 82#include <machine/atomic.h> 83 84#include <err.h> 85#include <errno.h> 86#include <fcntl.h> 87#include <signal.h> 88#include <stdio.h> 89#include <stdlib.h> 90#include <time.h> 91#include <unistd.h> 92 93static volatile u_int *share; 94 95#define MX 5000 96#define RUNTIME (1 * 60) 97#define SYNC 0 98 99int 100main(void) 101{ 102 pid_t pid; 103 size_t len; 104 time_t start; 105 int n; 106 107 len = PAGE_SIZE; 108 if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE, 109 MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED) 110 err(1, "mmap"); 111 112 n = 0; 113 signal(SIGCHLD, SIG_IGN); 114 start = time(NULL); 115 while ((time(NULL) - start) < RUNTIME) { 116 while ((atomic_load_int(&share[SYNC])) > MX) 117 usleep(100); 118 n++; 119 pid = fork(); 120 if (pid == -1) 121 err(1, "fork)"); 122 if (pid == 0) { 123 atomic_add_int(&share[SYNC], 1); 124 while (atomic_load_int(&share[SYNC]) <= MX) 125 usleep(10000); 126 usleep(arc4random() % 1000); 127 atomic_add_int(&share[SYNC], -1); 128 raise(SIGHUP); 129 _exit(0); 130 } 131 } 132 atomic_add_int(&share[SYNC], MX * 2); 133 fprintf(stderr, "%d fork() calls\n", n); 134} 135