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|
#!/bin/sh
# Regression test for:
# D53963: vm_fault: only rely on PG_ZERO when the page was newly allocated
# Test scenario suggestions by: kib
# Problem seen:
# b[0] is 4. Expected 0
# b[0] is 4. Expected 0
. ../default.cfg
set -u
prog=$(basename "$0" .sh)
cat > /tmp/$prog.c <<EOF
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static int debug = 0;
static int fail, fd, ok, parallel;
static volatile int done, go;
static char *buf;
static char *path = "/dev/md$mdstart";
#define PARALLEL 3
#define RUNTIME 180
void *
wr(void *arg __unused)
{
int n;
while (done != 1) {
while (go == 0 && done != 1) {
usleep(10);
}
go = 2;
n = write(fd, buf, 512);
if (n == -1 && errno != EFAULT)
warn("write()");
if (debug == 1) {
if (n == -1)
fail++;
else
ok++;
}
}
return (NULL);
}
int
test(void)
{
size_t len;
int i, pagesize;
char *a, *b, *c, *p;
pagesize = sysconf(_SC_PAGESIZE);
len = 3 * pagesize;
if ((p = mmap(NULL, len, PROT_READ | PROT_WRITE,
MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
err(1, "mmap(%ld pages", len);
if (mlock(p, len) == -1)
err(1, "mlock()");
a = p;
b = a + pagesize;
buf = b;
c = b + pagesize;
memset(a, 2, pagesize);
memset(b, 4, pagesize);
memset(c, 8, pagesize);
if (munlock(b, pagesize) == -1)
err(1, "munlock(b)");
go = 1;
while (go == 1)
usleep(10);
if (munmap(b, pagesize) == -1)
err(1, "munmap(b)");
if (mmap(b, pagesize, PROT_READ | PROT_WRITE,
MAP_ANON | MAP_FIXED, -1, 0) == MAP_FAILED)
err(1, "mmap(%d pages", pagesize);
for (i = 0; i < pagesize; i++) {
if (b[i] != 0) {
fprintf(stderr, "b[%d] is %d. Expected 0\n", i, (int)b[i]);
return (1);
}
}
go = 0;
if (munmap(p, len) == -1)
err(1, "Final munmap()");
return (0);
}
int
run(void)
{
pthread_t tid;
time_t start;
int e;
ok = fail = 0;
go = 0;
e = pthread_create(&tid, NULL, wr, NULL);
if (e)
errc(1, e, "pthread_create()");
fail = ok = 0;
start = time(NULL);
while ((time(NULL) - start) < 30) {
if (lseek(fd, 0, SEEK_SET) == -1)
err(1, "lseek(0)");
if (fsync(fd) != 0)
err(1, "fsync()");
if ((e = test()) != 0)
break;
}
done = 1;
pthread_join(tid, NULL);
if (debug == 1)
fprintf(stderr, "Fail = %3d, OK = %5d, parallel = %d\n", fail, ok, parallel);
_exit(e);
}
int
main(void)
{
pid_t pids[PARALLEL];
time_t start;
int e, i, status;
if ((fd = open(path, O_WRONLY)) == -1)
err(1, "open(%s)", path);
e = 0;
start = time(NULL);
while ((time(NULL) - start) < RUNTIME && e == 0) {
parallel = arc4random() % PARALLEL + 1;
for (i = 0; i < parallel; i++) {
if ((pids[i] = fork()) == 0)
run();
if (pids[i] == -1)
err(1, "fork()");
}
for (i = 0; i < parallel; i++) {
if (waitpid(pids[i], &status, 0) == -1)
err(1, "waitpid(%d)", pids[i]);
if (status != 0) {
if (WIFSIGNALED(status))
fprintf(stderr,
"pid %d exit signal %d\n",
pids[i], WTERMSIG(status));
}
e += status == 0 ? 0 : 1;
}
}
close(fd);
return (e);
}
EOF
mycc -o /tmp/$prog -Wall -Wextra -O0 -g /tmp/$prog.c -pthread || exit 1
mdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart
truncate -s 2g $diskimage
mdconfig -a -t vnode -f $diskimage -u $mdstart
../testcases/swap/swap -t 3m -i 20 -l 100 > /dev/null &
sleep 3
cd /tmp; ./$prog; s=$?; cd -
while pkill swap; do sleep .1; done
wait
rm -f /tmp/$prog.c /tmp/$prog $diskimage
mdconfig -d -u $mdstart
exit $s
|
