----- Original Message -----
> From: "DAN LI" <[email protected]>
> To: "LTP list" <[email protected]>
> Cc: "Jan Stancek" <[email protected]>, [email protected]
> Sent: Monday, 24 June, 2013 10:03:57 AM
> Subject: [LTP] [PATCH v2] mmap/mmap13.c: new case to test SIGBUS error of mmap
>
>
> Test SIGBUS error by accessing to a portion of the buffer that does not
> correspond to the file.
>
> Signed-off-by: DAN LI <[email protected]>
Reviewed-by: Jan Stancek <[email protected]>
v2 looks good to me. As for others, ../.gitignore is missing "mmap13",
but I think comitter can add that.
Regards,
Jan
> ---
> runtest/syscalls | 1 +
> testcases/kernel/syscalls/mmap/mmap13.c | 152
> ++++++++++++++++++++++++++++++++
> 2 files changed, 153 insertions(+)
> create mode 100644 testcases/kernel/syscalls/mmap/mmap13.c
>
> diff --git a/runtest/syscalls b/runtest/syscalls
> index e6ce29c..eba0200 100644
> --- a/runtest/syscalls
> +++ b/runtest/syscalls
> @@ -561,6 +561,7 @@ mmap06 mmap06
> mmap07 mmap07
> mmap08 mmap08
> mmap09 mmap09
> +mmap13 mmap13
> # test is broken, mask it for now.
> #mmap11 mmap11 -i 30000
>
> diff --git a/testcases/kernel/syscalls/mmap/mmap13.c
> b/testcases/kernel/syscalls/mmap/mmap13.c
> new file mode 100644
> index 0000000..0fe039e
> --- /dev/null
> +++ b/testcases/kernel/syscalls/mmap/mmap13.c
> @@ -0,0 +1,152 @@
> +/*
> + * Copyright (c) 2013 FNST, DAN LI <[email protected]>
> + *
> + * 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, write to the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
> USA
> + */
> +
> +/*
> + * Test Description:
> + * Verify error signal SIGBUS.
> + * "Attempted access to a portion of the buffer that does not correspond
> + * to the file."
> + *
> + * Expected Result:
> + * mmap() should succeed returning the address of the mapped region,
> + * and an attempt to access the memory which does not correspond to the
> file
> + * should rise the signal SIGBUS.
> + */
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <sys/types.h>
> +#include <errno.h>
> +#include <unistd.h>
> +#include <fcntl.h>
> +#include <string.h>
> +#include <signal.h>
> +#include <sys/stat.h>
> +#include <sys/mman.h>
> +#include <setjmp.h>
> +
> +#include "test.h"
> +#include "usctest.h"
> +
> +#define TEMPFILE "mmapfile"
> +
> +char *TCID = "mmap13";
> +int TST_TOTAL = 1;
> +
> +static size_t page_sz;
> +static char *addr;
> +static int fildes;
> +static volatile sig_atomic_t pass;
> +static sigjmp_buf env;
> +
> +static void setup(void);
> +static void cleanup(void);
> +static void sig_handler(int sig);
> +
> +int main(int argc, char *argv[])
> +{
> + int lc;
> + char *ch;
> + char *msg;
> +
> + msg = parse_opts(argc, argv, NULL, NULL);
> + if (msg != NULL)
> + tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
> +
> + setup();
> +
> + for (lc = 0; TEST_LOOPING(lc); lc++) {
> + tst_count = 0;
> +
> + addr = mmap(0, page_sz * 2, PROT_READ | PROT_WRITE,
> + MAP_FILE | MAP_SHARED, fildes, 0);
> +
> + if (addr == MAP_FAILED) {
> + tst_resm(TFAIL | TERRNO, "mmap() failed on %s",
> + TEMPFILE);
> + continue;
> + }
> +
> + if (STD_FUNCTIONAL_TEST) {
> +
> + if (sigsetjmp(env, 1) == 0) {
> + ch = addr + page_sz + 1;
> + *ch = 0;
> + }
> +
> + if (pass)
> + tst_resm(TPASS, "Got SIGBUS "
> + "as expected");
> + else
> + tst_resm(TFAIL, "Invalid access not "
> + "rise SIGBUS");
> + } else {
> + tst_resm(TPASS, "call succeeded");
> + }
> +
> + if (munmap(addr, page_sz * 2) != 0)
> + tst_brkm(TFAIL | TERRNO, cleanup,
> + "failed to unmap the mmapped pages");
> +
> + pass = 0;
> + }
> +
> + cleanup();
> + tst_exit();
> +}
> +
> +static void setup(void)
> +{
> + tst_sig(NOFORK, sig_handler, cleanup);
> +
> + TEST_PAUSE;
> +
> + page_sz = getpagesize();
> +
> + tst_tmpdir();
> +
> + fildes = open(TEMPFILE, O_RDWR | O_CREAT, 0766);
> + if (fildes < 0)
> + tst_brkm(TFAIL | TERRNO, cleanup, "opening %s failed",
> + TEMPFILE);
> +
> + if (ftruncate(fildes, page_sz / 2) == -1)
> + tst_brkm(TFAIL | TERRNO, cleanup, "ftruncate %s failed",
> + TEMPFILE);
> +}
> +
> +/*
> + * This function gets executed when the test process receives
> + * the signal SIGBUS while trying to access the memory which
> + * does not correspond to the file.
> + */
> +static void sig_handler(int sig)
> +{
> + if (sig == SIGBUS) {
> + pass = 1;
> + siglongjmp(env, 1);
> + } else {
> + tst_brkm(TBROK, cleanup, "received an unexpected signal");
> + }
> +}
> +
> +static void cleanup(void)
> +{
> + close(fildes);
> + TEST_CLEANUP;
> + tst_rmdir();
> +}
> --
> 1.8.1
>
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