int main(int ac, char **av)
{
int lc;
int Hflag = 0;
long page_sz, map_sz;
int sflag = 0;
option_t options[] = {
{"H:", &Hflag, &Hopt},
{"s:", &sflag, &nr_opt},
{NULL, NULL, NULL}
};
tst_parse_opts(ac, av, options, &help);
check_hugepage();
if (!Hflag) {
tst_tmpdir();
Hopt = tst_get_tmpdir();
}
if (sflag)
hugepages = SAFE_STRTOL(NULL, nr_opt, 0, LONG_MAX);
page_sz = getpagesize();
map_sz = read_meminfo("Hugepagesize:") * 1024 * 2;
setup();
for (lc = 0; TEST_LOOPING(lc); lc++) {
/* Creat a temporary file used for huge mapping */
fildes = open(TEMPFILE, O_RDWR | O_CREAT, 0666);
if (fildes < 0)
tst_brkm(TBROK | TERRNO, cleanup,
"opening %s failed", TEMPFILE);
/* Creat a file used for normal mapping */
nfildes = open("/dev/zero", O_RDONLY, 0666);
if (nfildes < 0)
tst_brkm(TBROK | TERRNO, cleanup,
"opening /dev/zero failed");
tst_count = 0;
/*
* Call mmap on /dev/zero 5 times
*/
for (i = 0; i < 5; i++) {
addr = mmap(0, 256 * 1024 * 1024, PROT_READ,
MAP_SHARED, nfildes, 0);
addrlist[i] = addr;
}
while (range_is_mapped(cleanup, low_addr, low_addr + map_sz) == 1) {
low_addr = low_addr + 0x10000000;
if (low_addr < LOW_ADDR)
tst_brkm(TBROK | TERRNO, cleanup,
"no empty region to use");
}
/* mmap using normal pages and a low memory address */
addr = mmap((void *)low_addr, page_sz, PROT_READ,
MAP_SHARED | MAP_FIXED, nfildes, 0);
if (addr == MAP_FAILED)
tst_brkm(TBROK | TERRNO, cleanup,
"mmap failed on nfildes");
while (range_is_mapped(cleanup, low_addr2, low_addr2 + map_sz) == 1) {
low_addr2 = low_addr2 + 0x10000000;
if (low_addr2 < LOW_ADDR2)
tst_brkm(TBROK | TERRNO, cleanup,
"no empty region to use");
}
/* Attempt to mmap a huge page into a low memory address */
addr2 = mmap((void *)low_addr2, map_sz, PROT_READ | PROT_WRITE,
MAP_SHARED, fildes, 0);
#if __WORDSIZE == 64 /* 64-bit process */
if (addr2 == MAP_FAILED) {
tst_resm(TFAIL | TERRNO, "huge mmap failed unexpectedly"
" with %s (64-bit)", TEMPFILE);
close(fildes);
continue;
} else {
tst_resm(TPASS, "huge mmap succeeded (64-bit)");
}
#else /* 32-bit process */
if (addr2 == MAP_FAILED)
tst_resm(TFAIL | TERRNO, "huge mmap failed unexpectedly"
" with %s (32-bit)", TEMPFILE);
else if (addr2 > 0) {
tst_resm(TCONF,
"huge mmap failed to test the scenario");
close(fildes);
continue;
} else if (addr == 0)
tst_resm(TPASS, "huge mmap succeeded (32-bit)");
#endif
/* Clean up things in case we are looping */
for (i = 0; i < 5; i++) {
if (munmap(addrlist[i], 256 * 1024 * 1024) == -1)
tst_resm(TBROK | TERRNO,
"munmap of addrlist[%d] failed", i);
}
#if __WORDSIZE == 64
if (munmap(addr2, map_sz) == -1)
tst_brkm(TFAIL | TERRNO, NULL, "huge munmap failed");
#endif
if (munmap(addr, page_sz) == -1)
tst_brkm(TFAIL | TERRNO, NULL, "munmap failed");
close(fildes);
}
cleanup();
tst_exit();
}
int main(int argc, char *argv[])
{
long hpage_size;
int fd;
void *p;
unsigned long straddle_addr;
test_init(argc, argv);
hpage_size = check_hugepagesize();
if (sizeof(void *) <= 4)
TEST_BUG("64-bit only");
if (hpage_size > FOURGB)
CONFIG("Huge page size too large");
fd = hugetlbfs_unlinked_fd();
if (fd < 0)
FAIL("hugetlbfs_unlinked_fd()");
straddle_addr = FOURGB - hpage_size;
/* We first try to get the mapping without MAP_FIXED */
verbose_printf("Mapping without MAP_FIXED at %lx...", straddle_addr);
p = mmap((void *)straddle_addr, 2*hpage_size, PROT_READ|PROT_WRITE,
MAP_SHARED, fd, 0);
if (p == (void *)straddle_addr) {
/* These tests irrelevant if we didn't get the
* straddle address */
verbose_printf("done\n");
if (test_addr_huge(p) != 1)
FAIL("Mapped address is not hugepage");
if (test_addr_huge(p + hpage_size) != 1)
FAIL("Mapped address is not hugepage");
verbose_printf("Clearing below 4GB...");
memset(p, 0, hpage_size);
verbose_printf("done\n");
verbose_printf("Clearing above 4GB...");
memset(p + hpage_size, 0, hpage_size);
verbose_printf("done\n");
} else {
verbose_printf("got %p instead, never mind\n", p);
munmap(p, 2*hpage_size);
}
verbose_printf("Mapping with MAP_FIXED at %lx...", straddle_addr);
p = mmap((void *)straddle_addr, 2*hpage_size, PROT_READ|PROT_WRITE,
MAP_SHARED|MAP_FIXED, fd, 0);
if (p == MAP_FAILED) {
/* this area crosses last low slice and first high slice */
unsigned long below_start = FOURGB - 256L*1024*1024;
unsigned long above_end = 1024L*1024*1024*1024;
if (range_is_mapped(below_start, above_end) == 1) {
verbose_printf("region (4G-256M)-1T is not free\n");
verbose_printf("mmap() failed: %s\n", strerror(errno));
PASS_INCONCLUSIVE();
} else
FAIL("mmap() FIXED failed: %s\n", strerror(errno));
}
if (p != (void *)straddle_addr) {
verbose_printf("got %p instead\n", p);
FAIL("Wrong address with MAP_FIXED");
}
verbose_printf("done\n");
if (test_addr_huge(p) != 1)
FAIL("Mapped address is not hugepage");
if (test_addr_huge(p + hpage_size) != 1)
FAIL("Mapped address is not hugepage");
verbose_printf("Clearing below 4GB...");
memset(p, 0, hpage_size);
verbose_printf("done\n");
verbose_printf("Clearing above 4GB...");
memset(p + hpage_size, 0, hpage_size);
verbose_printf("done\n");
verbose_printf("Tested above 4GB\n");
PASS();
}