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Diffstat (limited to 'winsup/testsuite/winsup.api/ltp/mmap05.c')
| -rw-r--r-- | winsup/testsuite/winsup.api/ltp/mmap05.c | 303 |
1 files changed, 303 insertions, 0 deletions
diff --git a/winsup/testsuite/winsup.api/ltp/mmap05.c b/winsup/testsuite/winsup.api/ltp/mmap05.c new file mode 100644 index 000000000..e8186899f --- /dev/null +++ b/winsup/testsuite/winsup.api/ltp/mmap05.c @@ -0,0 +1,303 @@ +/* + * + * Copyright (c) International Business Machines Corp., 2001 + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* + * Test Name: mmap05 + * + * Test Description: + * Call mmap() to map a file creating mapped memory with no access under + * the following conditions - + * - The prot parameter is set to PROT_NONE + * - The file descriptor is open for read(any mode other than write) + * - The minimum file permissions should be 0444. + * + * The call should succeed to map the file creating mapped memory with the + * required attributes. + * + * Expected Result: + * mmap() should succeed returning the address of the mapped region, + * and an attempt to access the contents of the mapped region should give + * rise to the signal SIGSEGV. + * + * Algorithm: + * Setup: + * Setup signal handling. + * Pause for SIGUSR1 if option specified. + * Create temporary directory. + * + * Test: + * Loop if the proper options are given. + * Execute system call + * Check return code, if system call failed (return=-1) + * Log the errno and Issue a FAIL message. + * Otherwise, + * Verify the Functionality of system call + * if successful, + * Issue Functionality-Pass message. + * Otherwise, + * Issue Functionality-Fail message. + * Cleanup: + * Print errno log and/or timing stats if options given + * Delete the temporary directory created. + * + * Usage: <for command-line> + * mmap05 [-c n] [-f] [-i n] [-I x] [-P x] [-t] + * where, -c n : Run n copies concurrently. + * -f : Turn off functionality Testing. + * -i n : Execute test n times. + * -I x : Execute test for x seconds. + * -P x : Pause for x seconds between iterations. + * -t : Turn on syscall timing. + * + * HISTORY + * 07/2001 Ported by Wayne Boyer + * + * RESTRICTIONS: + * None. + */ + +#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="mmap05"; /* Test program identifier. */ +int TST_TOTAL=1; /* Total number of test cases. */ +extern int Tst_count; /* Test Case counter for tst_* routines */ +size_t page_sz; /* system page size */ +char *addr; /* addr of memory mapped region */ +int fildes = -1; /* file descriptor for temporary file */ +int pass=0; /* pass flag perhaps set to 1 in sig_handler */ +sigjmp_buf env; /* environment for sigsetjmp/siglongjmp */ + +void setup(); /* Main setup function of test */ +void cleanup(); /* cleanup function for the test */ +void sig_handler(); /* signal handler to catch SIGSEGV */ + +int +main(int ac, char **av) +{ + int lc; /* loop counter */ + const char *msg; /* message returned from parse_opts */ + char file_content; /* tempfile content */ + + /* Parse standard options given to run the test. */ + msg = parse_opts(ac, av, (option_t *) NULL, NULL); + if (msg != (char *) NULL) { + tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); + tst_exit(); + } + + /* Perform global setup for test */ + setup(); + + /* Check looping state if -i option given */ + for (lc = 0; TEST_LOOPING(lc); lc++) { + /* Reset Tst_count in case we are looping. */ + Tst_count=0; + + /* + * Call mmap to map the temporary file 'TEMPFILE' + * with no access. + */ + + TEST(mmap(0, page_sz, PROT_NONE, + MAP_FILE|MAP_SHARED, fildes, 0)); + + /* Check for the return value of mmap() */ + if (TEST_RETURN == (int)MAP_FAILED) { + tst_resm(TFAIL, "mmap() Failed on %s, errno=%d : %s", + TEMPFILE, errno, strerror(errno)); + continue; + } + + /* + * Perform functional verification if test + * executed without (-f) option. + */ + if (STD_FUNCTIONAL_TEST) { + + /* + * Try to access the mapped region. This should + * generate a SIGSEGV which will be caught below. + * + * This is wrapped by the sigsetjmp() call that will + * take care of restoring the program's context in an + * elegant way in conjunction with the call to + * siglongjmp() in the signal handler. + */ + if (sigsetjmp(env, 1) == 0) { + file_content = addr[0]; + } + + if (pass) { + tst_resm(TPASS, "Got SIGSEGV as expected"); + } else { + tst_resm(TFAIL, "Mapped memory region with NO " + "access is accessible"); + } + } else { + tst_resm(TPASS, "call succeeded"); + } + + /* Unmap mapped memory and reset pass in case we are looping */ + if (munmap(addr, page_sz) != 0) { + tst_brkm(TFAIL, cleanup, "munmap() fails to unmap the " + "memory, errno=%d", errno); + } + pass = 0; + + } /* End for TEST_LOOPING */ + + /* Call cleanup() to undo setup done for the test. */ + cleanup(); + + /*NOTREACHED*/ +} /* End main */ + +/* + * setup() - performs all ONE TIME setup for this test. + * Get the system page size. + * Create a temporary directory and a file under it. + * Write some known data into file and close it. + * Change the mode permissions on file to 0444 + * Re-open the file for reading. + */ +void +setup() +{ + char *tst_buff; /* test buffer to hold known data */ + + /* capture signals */ + tst_sig(NOFORK, sig_handler, cleanup); + + /* Pause if that option was specified */ + TEST_PAUSE; + + /* Get the system page size */ + if ((page_sz = getpagesize()) < 0) { + tst_brkm(TFAIL, NULL, + "getpagesize() fails to get system page size"); + tst_exit(); + } + + /* Allocate space for the test buffer */ + if ((tst_buff = (char *)calloc(page_sz, sizeof(char))) == NULL) { + tst_brkm(TFAIL, NULL, + "calloc() failed to allocate space for tst_buff"); + tst_exit(); + } + + /* Fill the test buffer with the known data */ + memset(tst_buff, 'A', page_sz); + + /* make a temp directory and cd to it */ + tst_tmpdir(); + + /* Creat a temporary file used for mapping */ + if ((fildes = open(TEMPFILE, O_WRONLY | O_CREAT, 0666)) < 0) { + tst_brkm(TFAIL, NULL, "open() on %s Failed, errno=%d : %s", + TEMPFILE, errno, strerror(errno)); + free(tst_buff); + cleanup(); + } + + /* Write test buffer contents into temporary file */ + if (write(fildes, tst_buff, strlen(tst_buff)) != strlen(tst_buff)) { + tst_brkm(TFAIL, NULL, "write() on %s Failed, errno=%d : %s", + TEMPFILE, errno, strerror(errno)); + free(tst_buff); + cleanup(); + } + + /* Free the memory allocated for test buffer */ + free(tst_buff); + + /* Close the temporary file opened for write */ + if (close(fildes) < 0) { + tst_brkm(TFAIL, cleanup, "close() on %s Failed, errno=%d : %s", + TEMPFILE, errno, strerror(errno)); + } + + /* Make sure proper permissions set on file */ + if (chmod(TEMPFILE, 0444) < 0) { + tst_brkm(TFAIL, cleanup, "chmod() on %s Failed, errno=%d : %s", + TEMPFILE, errno, strerror(errno)); + } + + /* Open the temporary file again for reading */ + if ((fildes = open(TEMPFILE, O_RDONLY)) < 0) { + tst_brkm(TFAIL, cleanup, "open(%s) with read-only Failed, " + "errno:%d", TEMPFILE, errno); + } +} + +/* + * sig_handler() - Signal Cathing function. + * This function gets executed when the test process receives + * the signal SIGSEGV while trying to access the contents of memory which + * is not accessible. + */ +void +sig_handler(sig) +{ + if (sig == SIGSEGV) { + /* set the global variable and jump back */ + pass = 1; + siglongjmp(env, 1); + } else { + tst_brkm(TBROK, cleanup, "received an unexpected signal"); + } +} + +/* + * cleanup() - performs all ONE TIME cleanup for this test at + * completion or premature exit. + * Remove the temporary directory created. + */ +void +cleanup() +{ + /* + * print timing stats if that option was specified. + * print errno log if that option was specified. + */ + TEST_CLEANUP; + + if (fildes >= 0) + close (fildes); + + /* Remove tmp dir and all files in it */ + tst_rmdir(); + + /* exit with return code appropriate for results */ + tst_exit(); +} |