int main(int argc, char *argv[])
{
void *addr;
int i;
int ret;
int fd = 0;
int semid;
int semaphore;
int inject = 0;
int madvise_code = MADV_HWPOISON;
int early_kill = 0;
int avoid_touch = 0;
int anonflag = 0;
int shmflag = 0;
int shmkey = 0;
int forkflag = 0;
int privateflag = 0;
int cowflag = 0;
char c;
pid_t pid = 0;
void *expected_addr = NULL;
struct sembuf sembuffer;
PS = getpagesize();
HPS = HPAGE_SIZE;
file_size = 1;
corrupt_page = -1;
if (argc == 1) {
usage();
exit(EXIT_FAILURE);
}
while ((c = getopt_long(argc, argv,
"m:o:xOeSAaFpcf:h", opts, NULL)) != -1) {
switch (c) {
case 'm':
file_size = strtol(optarg, NULL, 10);
break;
case 'o':
corrupt_page = strtol(optarg, NULL, 10);
break;
case 'x':
inject = 1;
break;
case 'O':
madvise_code = MADV_SOFT_OFFLINE;
break;
case 'e':
early_kill = 1;
break;
case 'S':
shmflag = 1;
break;
case 'A':
anonflag = 1;
break;
case 'a':
avoid_touch = 1;
break;
case 'F':
forkflag = 1;
break;
case 'p':
privateflag = 1;
break;
case 'c':
cowflag = 1;
break;
case 'f':
strcat(filename, optarg);
shmkey = strtol(optarg, NULL, 10);
break;
case 'h':
usage();
exit(EXIT_SUCCESS);
default:
usage();
exit(EXIT_FAILURE);
}
}
if (inject && corrupt_page * PS > file_size * HPAGE_SIZE)
errmsg("Target page is out of range.\n");
if (avoid_touch && corrupt_page == -1)
errmsg("Avoid which page?\n");
/* Construct file name */
if (access(argv[argc - 1], F_OK) == -1) {
usage();
exit(EXIT_FAILURE);
} else {
strcpy(filepath, argv[argc - 1]);
strcat(filepath, filename);
}
if (shmflag) {
addr = alloc_shm_hugepage(&shmkey, file_size * HPAGE_SIZE);
if (!addr)
errmsg("Failed in alloc_shm_hugepage()");
} else if (anonflag) {
addr = alloc_anonymous_hugepage(file_size * HPAGE_SIZE,
privateflag);
if (!addr)
errmsg("Failed in alloc_anonymous_hugepage()");
} else {
addr = alloc_filebacked_hugepage(filepath,
file_size * HPAGE_SIZE,
privateflag, &fd);
if (!addr)
errmsg("Failed in alloc_filebacked_hugepage()");
}
if (corrupt_page != -1 && avoid_touch)
expected_addr = (void *)(addr + corrupt_page / 512 * HPAGE_SIZE);
if (forkflag) {
semid = semget(IPC_PRIVATE, 1, 0666|IPC_CREAT);
if (semid == -1) {
perror("semget");
goto cleanout;
}
semaphore = semctl(semid, 0, SETVAL, 1);
if (semaphore == -1) {
perror("semctl");
goto cleanout;
}
if (get_semaphore(semid, &sembuffer)) {
perror("get_semaphore");
goto cleanout;
}
}
write_hugepage(addr, file_size, 0);
read_hugepage(addr, file_size, 0);
if (early_kill)
prctl(PR_MCE_KILL, PR_MCE_KILL_SET, PR_MCE_KILL_EARLY,
NULL, NULL);
/*
* Intended order:
* 1. Child COWs
* 2. Parent madvise()s
* 3. Child exit()s
*/
if (forkflag) {
pid = fork();
if (!pid) {
/* Semaphore is already held */
if (cowflag) {
write_hugepage(addr, file_size, 0);
read_hugepage(addr, file_size, 0);
}
if (put_semaphore(semid, &sembuffer))
err("put_semaphore");
usleep(1000);
/* Wait for madvise() to be done */
if (get_semaphore(semid, &sembuffer))
err("put_semaphore");
if (put_semaphore(semid, &sembuffer))
err("put_semaphore");
return 0;
}
}
/* Wait for COW */
if (forkflag && get_semaphore(semid, &sembuffer)) {
perror("get_semaphore");
goto cleanout;
}
if (inject && corrupt_page != -1) {
ret = madvise(addr + corrupt_page * PS, PS, madvise_code);
if (ret) {
printf("madivise return %d :", ret);
perror("madvise");
goto cleanout;
}
}
if (forkflag && put_semaphore(semid, &sembuffer)) {
perror("put_semaphore");
goto cleanout;
}
if (madvise_code != MADV_SOFT_OFFLINE);
write_hugepage(addr, file_size, expected_addr);
read_hugepage(addr, file_size, expected_addr);
if (forkflag) {
if (wait(&i) == -1)
err("wait");
if (semctl(semid, 0, IPC_RMID) == -1)
err("semctl(IPC_RMID)");
}
cleanout:
if (shmflag) {
if (free_shm_hugepage(shmkey, addr) == -1)
exit(2);
} else if (anonflag) {
if (free_anonymous_hugepage(addr, file_size * HPAGE_SIZE) == -1)
exit(2);
} else {
if (free_filebacked_hugepage(addr, file_size * HPAGE_SIZE,
fd, filepath) == -1)
exit(2);
}
return 0;
}
int main(int argc, char *argv[]) {
int fd;
int sem;
int nrpages = 1;
int ret = 0;
int tmp = 0;
int offset = 0;
char c;
char *filename;
char *actype;
char *onerror;
char *p;
pid_t pid;
int wait_status;
uint64_t pflag;
struct sembuf sembuf;
struct pagestat pgstat;
if (argc != 5) {
printf("Usage: %s filename nrpages accesstype onerror\n", argv[0]);
exit(EXIT_FAILURE);
}
filename = argv[1];
nrpages = strtol(argv[2], NULL, 10);
actype = argv[3];
onerror = argv[4];
DEB("filename = %s, nrpages = %d, actype = %s, onerror = %s\n",
filename, nrpages, actype, onerror);
if (strcmp(onerror, "onerror") == 0)
offset = 0;
else
offset = PS;
sem = create_and_init_semaphore();
fd = open_check(filename, O_RDWR, 0);
tmp = pread(fd, rbuf, nrpages*PS, 0);
DEB("parent first read %d [%c,%c]\n", tmp, rbuf[0], rbuf[PS]);
get_semaphore(sem, &sembuf);
if ((pid = fork()) == 0) {
get_semaphore(sem, &sembuf); /* wait parent to dirty page */
p = mmap_check((void *)REFADDR, nrpages * PS,
PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (p != (void *)REFADDR)
err("mmap");
if (nrpages == 1) {
DEB("child read (after dirty) [%c]\n", p[0]);
#ifdef DEBUG
get_pagestat(p, &pgstat);
#endif
} else {
DEB("child read (after dirty) [%c,%c]\n", p[0], p[PS]);
#ifdef DEBUG
get_pagestat(p, &pgstat);
get_pagestat(p+PS, &pgstat);
#endif
}
DEB("child hwpoison to vaddr %p\n", p);
madvise(&p[0], PS, 100); /* hwpoison */
put_semaphore(sem, &sembuf);
get_semaphore(sem, &sembuf);
DEB("child terminated\n");
put_semaphore(sem, &sembuf);
get_pflags(pgstat.pfn, &pflag, 1);
exit(EXIT_SUCCESS);
} else {
DEB("parent dirty\n");
usleep(1000);
memset(wbuf, 49, nrpages * PS);
pwrite(fd, wbuf, nrpages * PS, 0);
tmp = pread(fd, rbuf, nrpages * PS, 0);
DEB("parent second read (after dirty) %d [%c,%c]\n",
tmp, rbuf[0], rbuf[PS]);
put_semaphore(sem, &sembuf); /* kick child to inject error */
get_semaphore(sem, &sembuf); /* pagecache should be hwpoison */
DEB("parent check\n");
if (strcmp(actype, "read") == 0) {
tmp = pread(fd, rbuf, PS, offset);
if (tmp < 0)
DEB("parent first read failed.\n");
tmp = pread(fd, rbuf, PS, offset);
DEB("parent read after hwpoison %d [%c,%c]\n",
tmp, rbuf[0], rbuf[PS]);
if (tmp < 0) {
ret = -1;
perror("read");
} else {
ret = 0;
}
} else if (strcmp(actype, "writefull") == 0) {
memset(wbuf, 50, nrpages * PS);
tmp = pwrite(fd, wbuf, PS, offset);
tmp = pwrite(fd, wbuf, PS, offset);
DEB("parent write after hwpoison %d\n", tmp);
if (tmp < 0) {
ret = -1;
perror("writefull");
} else {
ret = 0;
}
} else if (strcmp(actype, "writepart") == 0) {
memset(wbuf, 50, nrpages * PS);
tmp = pwrite(fd, wbuf, PS / 2, offset);
tmp = pwrite(fd, wbuf, PS / 2, offset);
DEB("parent write after hwpoison %d\n", tmp);
if (tmp < 0) {
ret = -1;
perror("writefull");
} else {
ret = 0;
}
} else if (strcmp(actype, "fsync") == 0) {
ret = fsync(fd);
ret = fsync(fd);
DEB("parent fsync after hwpoison [ret %d]\n", ret);
if (ret)
perror("fsync");
} else if (strcmp(actype, "sync_range_write") == 0) {
ret = sync_file_range(fd, offset, PS, SYNC_FILE_RANGE_WRITE);
ret = sync_file_range(fd, offset, PS, SYNC_FILE_RANGE_WRITE);
if (ret)
perror("sync_range_write");
} else if (strcmp(actype, "sync_range_wait") == 0) {
ret = sync_file_range(fd, offset, PS, SYNC_FILE_RANGE_WAIT_BEFORE);
ret = sync_file_range(fd, offset, PS, SYNC_FILE_RANGE_WAIT_BEFORE);
if (ret)
perror("sync_range_wait");
} else if (strcmp(actype, "mmapread") == 0) {
/*
* If mmap access failed, this program should be
* terminated by segmentation fault with non-zero
* returned value. So we don't set ret here.
*/
p = mmap_check((void *)REFADDR, nrpages * PS,
PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (p != (void *)REFADDR)
err("mmap");
c = p[offset];
DEB("parent mmap() read after hwpoison [%c]\n", p[offset]);
} else if (strcmp(actype, "mmapwrite") == 0) {
p = mmap_check((void *)REFADDR, nrpages * PS,
PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (p != (void *)REFADDR)
err("mmap");
memset(&p[offset], 50, PS);
DEB("parent mmap() write after hwpoison [%c]\n", p[offset]);
}
}
put_semaphore(sem, &sembuf);
waitpid(pid, &wait_status, 0);
if (!WIFEXITED(wait_status))
err("waitpid");
delete_semaphore(sem);
DEB("parent exit %d.\n", ret);
return ret;
}