static void test_mprotect(int fd, char *testname,
unsigned long len1, int prot1,
unsigned long len2, int prot2)
{
void *p;
int err;
verbose_printf("Testing %s\n", testname);
verbose_printf("Mapping with prot=%x\n", prot1);
p = mmap(NULL, len1, prot1, MAP_SHARED, fd, 0);
if (p == MAP_FAILED)
FAIL("%s: mmap(prot=%x): %s", testname, prot1,
strerror(errno));
test_prot(p, prot1);
verbose_printf("mprotect()ing to prot=%x\n", prot2);
err = mprotect(p, len2, prot2);
if (err != 0)
FAIL("%s: mprotect(prot=%x): %s", testname, prot2,
strerror(errno));
test_prot(p, prot2);
if (len2 < len1)
test_prot(p + len2, prot1);
munmap(p, len1);
}
void
tests_prot(void)
{
int n = init_test_prot();
int i, j;
/* Try each combination of protection. */
for (i = 0; i < n; i++) {
for (j = 0; j < n; j++)
test_prot(SIG1, i, j, SIGSETSIZE);
}
/* Try some random values. */
for (i = 0; i < 1000; i++) {
test_prot(rand() % (SIGMAX + 2), rand() % n, rand() % n,
SIGSETSIZE + (rand() % 10 == 0 ? 1 : 0));
}
}