Correct the position of a "stop if MAP_FAILED" check in the mmap() tests, so that if mmap() does fail we print a failure message rather than segfaulting inside memcpy(). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
477 lines
12 KiB
C
477 lines
12 KiB
C
/*
|
|
* Small test program to verify simulated mmap behaviour.
|
|
*
|
|
* When running qemu-linux-user with the -p flag, you may need to tell
|
|
* this test program about the pagesize because getpagesize() will not reflect
|
|
* the -p choice. Simply pass one argument beeing the pagesize.
|
|
*
|
|
* Copyright (c) 2007 AXIS Communications AB
|
|
* Written by Edgar E. Iglesias.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include <sys/mman.h>
|
|
|
|
#define D(x)
|
|
|
|
#define fail_unless(x) \
|
|
do \
|
|
{ \
|
|
if (!(x)) { \
|
|
fprintf (stderr, "FAILED at %s:%d\n", __FILE__, __LINE__); \
|
|
exit (EXIT_FAILURE); \
|
|
} \
|
|
} while (0);
|
|
|
|
unsigned char *dummybuf;
|
|
static unsigned int pagesize;
|
|
static unsigned int pagemask;
|
|
int test_fd;
|
|
size_t test_fsize;
|
|
|
|
void check_aligned_anonymous_unfixed_mmaps(void)
|
|
{
|
|
void *p1;
|
|
void *p2;
|
|
void *p3;
|
|
void *p4;
|
|
void *p5;
|
|
uintptr_t p;
|
|
int i;
|
|
|
|
fprintf (stderr, "%s", __func__);
|
|
for (i = 0; i < 0x1fff; i++)
|
|
{
|
|
size_t len;
|
|
|
|
len = pagesize + (pagesize * i & 7);
|
|
p1 = mmap(NULL, len, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
p2 = mmap(NULL, len, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
p3 = mmap(NULL, len, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
p4 = mmap(NULL, len, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
p5 = mmap(NULL, len, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
|
|
/* Make sure we get pages aligned with the pagesize. The
|
|
target expects this. */
|
|
fail_unless (p1 != MAP_FAILED);
|
|
fail_unless (p2 != MAP_FAILED);
|
|
fail_unless (p3 != MAP_FAILED);
|
|
fail_unless (p4 != MAP_FAILED);
|
|
fail_unless (p5 != MAP_FAILED);
|
|
p = (uintptr_t) p1;
|
|
D(printf ("p=%x\n", p));
|
|
fail_unless ((p & pagemask) == 0);
|
|
p = (uintptr_t) p2;
|
|
fail_unless ((p & pagemask) == 0);
|
|
p = (uintptr_t) p3;
|
|
fail_unless ((p & pagemask) == 0);
|
|
p = (uintptr_t) p4;
|
|
fail_unless ((p & pagemask) == 0);
|
|
p = (uintptr_t) p5;
|
|
fail_unless ((p & pagemask) == 0);
|
|
|
|
/* Make sure we can read from the entire area. */
|
|
memcpy (dummybuf, p1, pagesize);
|
|
memcpy (dummybuf, p2, pagesize);
|
|
memcpy (dummybuf, p3, pagesize);
|
|
memcpy (dummybuf, p4, pagesize);
|
|
memcpy (dummybuf, p5, pagesize);
|
|
|
|
munmap (p1, len);
|
|
munmap (p2, len);
|
|
munmap (p3, len);
|
|
munmap (p4, len);
|
|
munmap (p5, len);
|
|
}
|
|
fprintf (stderr, " passed\n");
|
|
}
|
|
|
|
void check_large_anonymous_unfixed_mmap(void)
|
|
{
|
|
void *p1;
|
|
uintptr_t p;
|
|
size_t len;
|
|
|
|
fprintf (stderr, "%s", __func__);
|
|
|
|
len = 0x02000000;
|
|
p1 = mmap(NULL, len, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
|
|
/* Make sure we get pages aligned with the pagesize. The
|
|
target expects this. */
|
|
fail_unless (p1 != MAP_FAILED);
|
|
p = (uintptr_t) p1;
|
|
fail_unless ((p & pagemask) == 0);
|
|
|
|
/* Make sure we can read from the entire area. */
|
|
memcpy (dummybuf, p1, pagesize);
|
|
munmap (p1, len);
|
|
fprintf (stderr, " passed\n");
|
|
}
|
|
|
|
void check_aligned_anonymous_unfixed_colliding_mmaps(void)
|
|
{
|
|
char *p1;
|
|
char *p2;
|
|
char *p3;
|
|
uintptr_t p;
|
|
int i;
|
|
|
|
fprintf (stderr, "%s", __func__);
|
|
for (i = 0; i < 0x2fff; i++)
|
|
{
|
|
int nlen;
|
|
p1 = mmap(NULL, pagesize, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
fail_unless (p1 != MAP_FAILED);
|
|
p = (uintptr_t) p1;
|
|
fail_unless ((p & pagemask) == 0);
|
|
memcpy (dummybuf, p1, pagesize);
|
|
|
|
p2 = mmap(NULL, pagesize, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
fail_unless (p2 != MAP_FAILED);
|
|
p = (uintptr_t) p2;
|
|
fail_unless ((p & pagemask) == 0);
|
|
memcpy (dummybuf, p2, pagesize);
|
|
|
|
|
|
munmap (p1, pagesize);
|
|
nlen = pagesize * 8;
|
|
p3 = mmap(NULL, nlen, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
|
|
fail_unless (p3 != MAP_FAILED);
|
|
|
|
/* Check if the mmaped areas collide. */
|
|
if (p3 < p2
|
|
&& (p3 + nlen) > p2)
|
|
fail_unless (0);
|
|
|
|
memcpy (dummybuf, p3, pagesize);
|
|
|
|
/* Make sure we get pages aligned with the pagesize. The
|
|
target expects this. */
|
|
p = (uintptr_t) p3;
|
|
fail_unless ((p & pagemask) == 0);
|
|
munmap (p2, pagesize);
|
|
munmap (p3, nlen);
|
|
}
|
|
fprintf (stderr, " passed\n");
|
|
}
|
|
|
|
void check_aligned_anonymous_fixed_mmaps(void)
|
|
{
|
|
char *addr;
|
|
void *p1;
|
|
uintptr_t p;
|
|
int i;
|
|
|
|
/* Find a suitable address to start with. */
|
|
addr = mmap(NULL, pagesize * 40, PROT_READ | PROT_WRITE,
|
|
MAP_PRIVATE | MAP_ANONYMOUS,
|
|
-1, 0);
|
|
fprintf (stderr, "%s addr=%p", __func__, addr);
|
|
fail_unless (addr != MAP_FAILED);
|
|
|
|
for (i = 0; i < 40; i++)
|
|
{
|
|
/* Create submaps within our unfixed map. */
|
|
p1 = mmap(addr, pagesize, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
|
|
-1, 0);
|
|
/* Make sure we get pages aligned with the pagesize.
|
|
The target expects this. */
|
|
p = (uintptr_t) p1;
|
|
fail_unless (p1 == addr);
|
|
fail_unless ((p & pagemask) == 0);
|
|
memcpy (dummybuf, p1, pagesize);
|
|
munmap (p1, pagesize);
|
|
addr += pagesize;
|
|
}
|
|
fprintf (stderr, " passed\n");
|
|
}
|
|
|
|
void check_aligned_anonymous_fixed_mmaps_collide_with_host(void)
|
|
{
|
|
char *addr;
|
|
void *p1;
|
|
uintptr_t p;
|
|
int i;
|
|
|
|
/* Find a suitable address to start with. Right were the x86 hosts
|
|
stack is. */
|
|
addr = ((void *)0x80000000);
|
|
fprintf (stderr, "%s addr=%p", __func__, addr);
|
|
fprintf (stderr, "FIXME: QEMU fails to track pages used by the host.");
|
|
|
|
for (i = 0; i < 20; i++)
|
|
{
|
|
/* Create submaps within our unfixed map. */
|
|
p1 = mmap(addr, pagesize, PROT_READ | PROT_WRITE,
|
|
MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
|
|
-1, 0);
|
|
/* Make sure we get pages aligned with the pagesize.
|
|
The target expects this. */
|
|
p = (uintptr_t) p1;
|
|
fail_unless (p1 == addr);
|
|
fail_unless ((p & pagemask) == 0);
|
|
memcpy (p1, dummybuf, pagesize);
|
|
munmap (p1, pagesize);
|
|
addr += pagesize;
|
|
}
|
|
fprintf (stderr, " passed\n");
|
|
}
|
|
|
|
void check_file_unfixed_mmaps(void)
|
|
{
|
|
unsigned int *p1, *p2, *p3;
|
|
uintptr_t p;
|
|
int i;
|
|
|
|
fprintf (stderr, "%s", __func__);
|
|
for (i = 0; i < 0x10; i++)
|
|
{
|
|
size_t len;
|
|
|
|
len = pagesize;
|
|
p1 = mmap(NULL, len, PROT_READ,
|
|
MAP_PRIVATE,
|
|
test_fd, 0);
|
|
p2 = mmap(NULL, len, PROT_READ,
|
|
MAP_PRIVATE,
|
|
test_fd, pagesize);
|
|
p3 = mmap(NULL, len, PROT_READ,
|
|
MAP_PRIVATE,
|
|
test_fd, pagesize * 2);
|
|
|
|
fail_unless (p1 != MAP_FAILED);
|
|
fail_unless (p2 != MAP_FAILED);
|
|
fail_unless (p3 != MAP_FAILED);
|
|
|
|
/* Make sure we get pages aligned with the pagesize. The
|
|
target expects this. */
|
|
p = (uintptr_t) p1;
|
|
fail_unless ((p & pagemask) == 0);
|
|
p = (uintptr_t) p2;
|
|
fail_unless ((p & pagemask) == 0);
|
|
p = (uintptr_t) p3;
|
|
fail_unless ((p & pagemask) == 0);
|
|
|
|
/* Verify that the file maps was made correctly. */
|
|
D(printf ("p1=%d p2=%d p3=%d\n", *p1, *p2, *p3));
|
|
fail_unless (*p1 == 0);
|
|
fail_unless (*p2 == (pagesize / sizeof *p2));
|
|
fail_unless (*p3 == ((pagesize * 2) / sizeof *p3));
|
|
|
|
memcpy (dummybuf, p1, pagesize);
|
|
memcpy (dummybuf, p2, pagesize);
|
|
memcpy (dummybuf, p3, pagesize);
|
|
munmap (p1, len);
|
|
munmap (p2, len);
|
|
munmap (p3, len);
|
|
}
|
|
fprintf (stderr, " passed\n");
|
|
}
|
|
|
|
void check_file_unfixed_eof_mmaps(void)
|
|
{
|
|
char *cp;
|
|
unsigned int *p1;
|
|
uintptr_t p;
|
|
int i;
|
|
|
|
fprintf (stderr, "%s", __func__);
|
|
for (i = 0; i < 0x10; i++)
|
|
{
|
|
p1 = mmap(NULL, pagesize, PROT_READ,
|
|
MAP_PRIVATE,
|
|
test_fd,
|
|
(test_fsize - sizeof *p1) & ~pagemask);
|
|
|
|
fail_unless (p1 != MAP_FAILED);
|
|
|
|
/* Make sure we get pages aligned with the pagesize. The
|
|
target expects this. */
|
|
p = (uintptr_t) p1;
|
|
fail_unless ((p & pagemask) == 0);
|
|
/* Verify that the file maps was made correctly. */
|
|
fail_unless (p1[(test_fsize & pagemask) / sizeof *p1 - 1]
|
|
== ((test_fsize - sizeof *p1) / sizeof *p1));
|
|
|
|
/* Verify that the end of page is accessable and zeroed. */
|
|
cp = (void *) p1;
|
|
fail_unless (cp[pagesize - 4] == 0);
|
|
munmap (p1, pagesize);
|
|
}
|
|
fprintf (stderr, " passed\n");
|
|
}
|
|
|
|
void check_file_fixed_eof_mmaps(void)
|
|
{
|
|
char *addr;
|
|
char *cp;
|
|
unsigned int *p1;
|
|
uintptr_t p;
|
|
int i;
|
|
|
|
/* Find a suitable address to start with. */
|
|
addr = mmap(NULL, pagesize * 44, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS,
|
|
-1, 0);
|
|
|
|
fprintf (stderr, "%s addr=%p", __func__, (void *)addr);
|
|
fail_unless (addr != MAP_FAILED);
|
|
|
|
for (i = 0; i < 0x10; i++)
|
|
{
|
|
/* Create submaps within our unfixed map. */
|
|
p1 = mmap(addr, pagesize, PROT_READ,
|
|
MAP_PRIVATE | MAP_FIXED,
|
|
test_fd,
|
|
(test_fsize - sizeof *p1) & ~pagemask);
|
|
|
|
fail_unless (p1 != MAP_FAILED);
|
|
|
|
/* Make sure we get pages aligned with the pagesize. The
|
|
target expects this. */
|
|
p = (uintptr_t) p1;
|
|
fail_unless ((p & pagemask) == 0);
|
|
|
|
/* Verify that the file maps was made correctly. */
|
|
fail_unless (p1[(test_fsize & pagemask) / sizeof *p1 - 1]
|
|
== ((test_fsize - sizeof *p1) / sizeof *p1));
|
|
|
|
/* Verify that the end of page is accessable and zeroed. */
|
|
cp = (void *)p1;
|
|
fail_unless (cp[pagesize - 4] == 0);
|
|
munmap (p1, pagesize);
|
|
addr += pagesize;
|
|
}
|
|
fprintf (stderr, " passed\n");
|
|
}
|
|
|
|
void check_file_fixed_mmaps(void)
|
|
{
|
|
unsigned char *addr;
|
|
unsigned int *p1, *p2, *p3, *p4;
|
|
int i;
|
|
|
|
/* Find a suitable address to start with. */
|
|
addr = mmap(NULL, pagesize * 40 * 4, PROT_READ,
|
|
MAP_PRIVATE | MAP_ANONYMOUS,
|
|
-1, 0);
|
|
fprintf (stderr, "%s addr=%p", __func__, (void *)addr);
|
|
fail_unless (addr != MAP_FAILED);
|
|
|
|
for (i = 0; i < 40; i++)
|
|
{
|
|
p1 = mmap(addr, pagesize, PROT_READ,
|
|
MAP_PRIVATE | MAP_FIXED,
|
|
test_fd, 0);
|
|
p2 = mmap(addr + pagesize, pagesize, PROT_READ,
|
|
MAP_PRIVATE | MAP_FIXED,
|
|
test_fd, pagesize);
|
|
p3 = mmap(addr + pagesize * 2, pagesize, PROT_READ,
|
|
MAP_PRIVATE | MAP_FIXED,
|
|
test_fd, pagesize * 2);
|
|
p4 = mmap(addr + pagesize * 3, pagesize, PROT_READ,
|
|
MAP_PRIVATE | MAP_FIXED,
|
|
test_fd, pagesize * 3);
|
|
|
|
/* Make sure we get pages aligned with the pagesize.
|
|
The target expects this. */
|
|
fail_unless (p1 == (void *)addr);
|
|
fail_unless (p2 == (void *)addr + pagesize);
|
|
fail_unless (p3 == (void *)addr + pagesize * 2);
|
|
fail_unless (p4 == (void *)addr + pagesize * 3);
|
|
|
|
/* Verify that the file maps was made correctly. */
|
|
fail_unless (*p1 == 0);
|
|
fail_unless (*p2 == (pagesize / sizeof *p2));
|
|
fail_unless (*p3 == ((pagesize * 2) / sizeof *p3));
|
|
fail_unless (*p4 == ((pagesize * 3) / sizeof *p4));
|
|
|
|
memcpy (dummybuf, p1, pagesize);
|
|
memcpy (dummybuf, p2, pagesize);
|
|
memcpy (dummybuf, p3, pagesize);
|
|
memcpy (dummybuf, p4, pagesize);
|
|
|
|
munmap (p1, pagesize);
|
|
munmap (p2, pagesize);
|
|
munmap (p3, pagesize);
|
|
munmap (p4, pagesize);
|
|
addr += pagesize * 4;
|
|
}
|
|
fprintf (stderr, " passed\n");
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
char tempname[] = "/tmp/.cmmapXXXXXX";
|
|
unsigned int i;
|
|
|
|
/* Trust the first argument, otherwise probe the system for our
|
|
pagesize. */
|
|
if (argc > 1)
|
|
pagesize = strtoul(argv[1], NULL, 0);
|
|
else
|
|
pagesize = sysconf(_SC_PAGESIZE);
|
|
|
|
/* Assume pagesize is a power of two. */
|
|
pagemask = pagesize - 1;
|
|
dummybuf = malloc (pagesize);
|
|
printf ("pagesize=%u pagemask=%x\n", pagesize, pagemask);
|
|
|
|
test_fd = mkstemp(tempname);
|
|
unlink(tempname);
|
|
|
|
/* Fill the file with int's counting from zero and up. */
|
|
for (i = 0; i < (pagesize * 4) / sizeof i; i++)
|
|
write (test_fd, &i, sizeof i);
|
|
/* Append a few extra writes to make the file end at non
|
|
page boundary. */
|
|
write (test_fd, &i, sizeof i); i++;
|
|
write (test_fd, &i, sizeof i); i++;
|
|
write (test_fd, &i, sizeof i); i++;
|
|
|
|
test_fsize = lseek(test_fd, 0, SEEK_CUR);
|
|
|
|
/* Run the tests. */
|
|
check_aligned_anonymous_unfixed_mmaps();
|
|
check_aligned_anonymous_unfixed_colliding_mmaps();
|
|
check_aligned_anonymous_fixed_mmaps();
|
|
check_file_unfixed_mmaps();
|
|
check_file_fixed_mmaps();
|
|
check_file_fixed_eof_mmaps();
|
|
check_file_unfixed_eof_mmaps();
|
|
|
|
/* Fails at the moment. */
|
|
/* check_aligned_anonymous_fixed_mmaps_collide_with_host(); */
|
|
|
|
return EXIT_SUCCESS;
|
|
}
|