142 lines
3.8 KiB
Bash
Executable File
142 lines
3.8 KiB
Bash
Executable File
#!/bin/sh
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#
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# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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#
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# Copyright (c) 2020 Konstantin Belousov
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# sigfastblock test scenario by Konstantin Belousov <kib@FreeBSD.org>
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. ../default.cfg
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[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
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[ `uname -p` != "amd64" ] && exit 0
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cat > /tmp/sigfastblock.c <<EOF
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/* $Id: sigfastblock1.c,v 1.4 2020/02/16 19:53:14 kostik Exp kostik $ */
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#include <sys/types.h>
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#include <sys/signalvar.h>
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#include <sys/sysctl.h>
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#include <err.h>
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#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#ifdef __ILP32
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#define BITNESS "32"
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#else
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#define BITNESS "64"
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#endif
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int block;
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static void
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sighandler(int signo, siginfo_t *si, void *ucp __unused)
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{
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printf("block %#x sig %d si_code %d si_pid %d\n",
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block, signo, si->si_code, si->si_pid);
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}
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int
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main(void)
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{
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struct timespec rqts;
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struct sigaction sa;
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int error, val;
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size_t valsize;
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pid_t child;
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valsize = sizeof(val);
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error = sysctlbyname("kern.elf" BITNESS ".sigfastblock", &val,
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&valsize, NULL, 0);
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if (error != 0)
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err(1, "sigfastblock sysctl");
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if (val != 0)
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errx(1, "sigfastblock use in rtld must be turned off");
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memset(&sa, 0, sizeof(sa));
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sa.sa_sigaction = sighandler;
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sa.sa_flags = SA_SIGINFO;
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error = sigaction(SIGUSR1, &sa, NULL);
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child = fork();
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if (child == -1)
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err(1, "fork");
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if (child == 0) {
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sleep(2);
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kill(getppid(), SIGUSR1);
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_exit(0);
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}
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error = __sys_sigfastblock(SIGFASTBLOCK_SETPTR, &block);
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if (error != 0)
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err(1, "sigfastblock setptr");
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printf("Registered block at %p\n", &block);
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block = SIGFASTBLOCK_INC;
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rqts.tv_sec = 4;
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rqts.tv_nsec = 0;
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errno = 0;
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error = nanosleep(&rqts, 0);
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printf("nanosleep 1 returned %d, errno %d, block %#x\n",
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error, errno, block);
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raise(SIGUSR1);
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errno = 0;
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error = nanosleep(&rqts, 0);
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printf("nanosleep 2 returned %d, errno %d, block %#x\n",
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error, errno, block);
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errno = 0;
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block -= SIGFASTBLOCK_INC;
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error = __sys_sigfastblock(SIGFASTBLOCK_UNBLOCK, NULL);
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printf("unblock returned %d, errno %d, block %#x\n",
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error, errno, block);
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}
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EOF
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mycc -o /tmp/sigfastblock -Wall -Wextra -O2 -g /tmp/sigfastblock.c || exit 1
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echo "Expect:
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Registered block at 0x2030c0
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nanosleep 1 returned -1, errno 4, block 0x11
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nanosleep 2 returned 0, errno 0, block 0x11
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unblock returned 0, errno 0, block 0
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block 0 sig 30 si_code 65543 si_pid 1151
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block 0 sig 30 si_code 65537 si_pid 1152
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"
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cd /tmp
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sysctl kern.elf64.sigfastblock=0
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sysctl kern.elf32.sigfastblock=0
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./sigfastblock; s=$?
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sysctl kern.elf64.sigfastblock=1
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sysctl kern.elf32.sigfastblock=1
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rm -f /tmp/sigfastblock.c /tmp/sigfastblock
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exit $s
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