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Diffstat (limited to 'qemu/tests/tcg/test-mmap.c')
| -rw-r--r-- | qemu/tests/tcg/test-mmap.c | 484 |
1 files changed, 484 insertions, 0 deletions
diff --git a/qemu/tests/tcg/test-mmap.c b/qemu/tests/tcg/test-mmap.c new file mode 100644 index 000000000..3982fa2c7 --- /dev/null +++ b/qemu/tests/tcg/test-mmap.c @@ -0,0 +1,484 @@ +/* + * 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 being 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 accessible 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 accessible 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"); +} + +void checked_write(int fd, const void *buf, size_t count) +{ + ssize_t rc = write(fd, buf, count); + fail_unless(rc == count); +} + +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++) { + checked_write(test_fd, &i, sizeof i); + } + + /* Append a few extra writes to make the file end at non + page boundary. */ + checked_write(test_fd, &i, sizeof i); i++; + checked_write(test_fd, &i, sizeof i); i++; + checked_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; +} |