154 lines
3.7 KiB
Bash
Executable File
154 lines
3.7 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2020 Jeffrey Roberson <jeff@FreeBSD.org>
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# All rights reserved.
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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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. ../default.cfg
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# "panic: freeing mapped page 0xfffffe000aa73910" seen:
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# https://people.freebsd.org/~pho/stress/log/collapse.txt
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odir=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $odir/$0 > collapse.c
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mycc -o collapse -Wall -Wextra -g -O0 collapse.c || exit 1
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rm -f collapse.c
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cd $odir
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daemon sh -c '(cd ../testcases/swap; ./swap -t 20m -i 16 -l 85)' > \
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/dev/null 2>&1
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sleep 2
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/tmp/collapse
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while pgrep -q swap; do
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pkill -9 swap
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done
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rm -f /tmp/collapse
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exit 0
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EOF
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#include <sys/param.h>
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#include <sys/mman.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.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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#define ADRSPACE (256 * 1024)
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#define DEPTH 6
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#define WIDTH 3
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#define PARALLEL 4
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#define RUNTIME 1200
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#define CHILDTIME 5
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#define STARTTIME 5
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#define TOUCH 16
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char *p;
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static void
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child(int depth, time_t start)
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{
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time_t run, delay;
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int i, shared, off;
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int len;
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/* Pick a random bit of address space to change inherit on. */
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for (i = 0; i < ADRSPACE; i += len) {
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shared = arc4random() & 0x1;
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len = roundup2(arc4random() % ((ADRSPACE - i) / 4),
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PAGE_SIZE);
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if (minherit(p + i, len, shared ? INHERIT_SHARE :
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INHERIT_COPY) != 0)
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err(1, "minherit");
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}
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for (i = 0; depth != 0 && i < WIDTH; i++)
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if (fork() == 0)
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child(depth - 1, start);
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/*
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* Touch all of the memory and exit at a random time to collapse
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* some portion of the chain.
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*/
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delay = arc4random() % (CHILDTIME - 1);
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run = arc4random() % (CHILDTIME - delay);
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for (;;) {
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if (time(NULL) >= start + delay)
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break;
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usleep(100);
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}
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while (time(NULL) - start < run) {
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off = rounddown2(arc4random() % ADRSPACE, PAGE_SIZE);
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bzero(p + off, PAGE_SIZE);
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usleep((run * 1000) / TOUCH);
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}
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_exit(0);
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}
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static void
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work(int depth)
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{
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if ((p = mmap(NULL, ADRSPACE, PROT_READ | PROT_WRITE,
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MAP_SHARED | MAP_ANON, -1, 0)) == MAP_FAILED) {
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if (errno == ENOMEM)
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return;
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err(1, "mmap()");
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}
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child(depth, time(NULL) + STARTTIME);
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}
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int
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main(void)
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{
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pid_t pids[PARALLEL];
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time_t start;
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int i, n;
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start = time(NULL);
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while (time(NULL) - start < RUNTIME) {
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n = arc4random() % PARALLEL + 1;
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for (i = 0; i < n; i++) {
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if ((pids[i] = fork()) == 0)
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work(DEPTH);
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}
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sleep(CHILDTIME + STARTTIME + 1);
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for (i = 0; i < n; i++)
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if (waitpid(pids[i], NULL, 0) != pids[i])
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err(1, "waitpid(%d)", pids[i]);
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}
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return (0);
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}
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