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]> --- 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 ------------------------------------------------------------------------------ This SF.net email is sponsored by Windows: Build for Windows Store. http://p.sf.net/sfu/windows-dev2dev _______________________________________________ Ltp-list mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ltp-list
