| /* |
| * Copyright (c) 2013 FNST, DAN LI <li.dan@cn.fujitsu.com> |
| * |
| * 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(NULL, 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(); |
| } |