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Diffstat (limited to 'winsup/testsuite/winsup.api/ltp/munmap01.c')
| -rw-r--r-- | winsup/testsuite/winsup.api/ltp/munmap01.c | 282 |
1 files changed, 282 insertions, 0 deletions
diff --git a/winsup/testsuite/winsup.api/ltp/munmap01.c b/winsup/testsuite/winsup.api/ltp/munmap01.c new file mode 100644 index 000000000..5de98b6ff --- /dev/null +++ b/winsup/testsuite/winsup.api/ltp/munmap01.c @@ -0,0 +1,282 @@ +/* + * + * 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: munmap01 + * + * Test Description: + * Verify that, munmap call will succeed to unmap a mapped file or + * anonymous shared memory region from the calling process's address space + * and after successful completion of munmap, the unmapped region is no + * longer accessible. + * + * Expected Result: + * munmap call should succeed to unmap a mapped file or anonymous shared + * memory region from the process's address space and it returns with a + * value 0, further reference to the unmapped region should result in a + * segmentation fault (SIGSEGV). + * + * Algorithm: + * Setup: + * Setup signal handling. + * Create temporary directory. + * Pause for SIGUSR1 if option specified. + * + * 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> + * munmap01 [-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 <errno.h> +#include <unistd.h> +#include <fcntl.h> +#include <sys/stat.h> +#include <sys/mman.h> + +#include "test.h" +#include "usctest.h" + +#define TEMPFILE "mmapfile" + +char *TCID="munmap01"; /* Test program identifier. */ +int TST_TOTAL=1; /* Total number of test cases. */ +extern int Tst_count; /* Test Case counter for tst_* routines */ + +char *addr; /* addr of memory mapped region */ +int fildes; /* file descriptor for tempfile */ +unsigned int map_len; /* length of the region to be mapped */ + +void setup(); /* Main setup function of test */ +void cleanup(); /* cleanup function for the test */ +void sig_handler(); /* signal catching function */ + +int +main(int ac, char **av) +{ + int lc; /* loop counter */ + const char *msg; /* message returned from parse_opts */ + + /* Parse standard options given to run the test. */ + msg = parse_opts(ac, av, (option_t *)NULL, NULL); + if (msg != (char *)NULL) { + tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s", msg); + } + + /* 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; + + /* Perform global setup for test */ + setup(); + + /* + * Call munmap to unmap the mapped region of the + * temporary file from the calling process's address space. + */ + TEST(munmap(addr, map_len)); + + /* Check for the return value of munmap() */ + if (TEST_RETURN == -1) { + tst_resm(TFAIL, "munmap() fails, errno=%d : %s", + TEST_ERRNO, strerror(TEST_ERRNO)); + continue; + } + + /* + * Perform functional verification if test + * executed without (-f) option. + */ + if (STD_FUNCTIONAL_TEST) { + /* + * Check whether further reference is possible + * to the unmapped memory region by writing + * to the first byte of region with + * some arbitrary number. + */ + *addr = 50; + + /* This message is printed if no SIGSEGV */ + tst_resm(TFAIL, "process succeeds to refer unmapped " + "memory region"); + } else { + tst_resm(TPASS, "call succeeded"); + } + + /* Call cleanup() to undo setup done for the test. */ + cleanup(); + + } /* End for TEST_LOOPING */ + + /* exit with return code appropriate for results */ + tst_exit(); + + /*NOTREACHED*/ +} /* End main */ + +/* + * setup() - performs all ONE TIME setup for this test. + * + * Set up signal handler to catch SIGSEGV. + * Get system page size, create a temporary file for reading/writing, + * write one byte data into it, map the open file for the specified + * map length. + */ +void +setup() +{ + size_t page_sz; /* system page size */ + + /* capture signals */ + tst_sig(NOFORK, DEF_HANDLER, cleanup); + + /* call signal function to trap the signal generated */ + if (signal(SIGSEGV, sig_handler) == SIG_ERR) { + tst_brkm(TBROK, cleanup, "signal fails to catch signal"); + tst_exit(); + } + + /* Pause if that option was specified */ + TEST_PAUSE; + + /* Get the system page size */ + if ((page_sz = getpagesize()) < 0) { + tst_brkm(TBROK, cleanup, + "getpagesize() fails to get system page size"); + tst_exit(); + } + + /* + * Get the length of the open file to be mapped into process + * address space. + */ + map_len = 3 * page_sz; + + /* make a temp directory and cd to it */ + tst_tmpdir(); + + /* Creat a temporary file used for mapping */ + if ((fildes = open(TEMPFILE, O_RDWR | O_CREAT, 0666)) < 0) { + tst_brkm(TBROK, cleanup, "open() on %s Failed, errno=%d : %s", + TEMPFILE, errno, strerror(errno)); + tst_exit(); + } + + /* + * move the file pointer to maplength position from the beginning + * of the file. + */ + if (lseek(fildes, map_len, SEEK_SET) == -1) { + tst_brkm(TBROK, cleanup, "lseek() fails on %s, errno=%d : %s", + TEMPFILE, errno, strerror(errno)); + tst_exit(); + } + + /* Write one byte into temporary file */ + if (write(fildes, "a", 1) != 1) { + tst_brkm(TBROK, cleanup, "write() on %s Failed, errno=%d : %s", + TEMPFILE, errno, strerror(errno)); + tst_exit(); + } + + /* + * map the open file 'TEMPFILE' from its beginning up to the maplength + * into the calling process's address space at the system choosen + * with read/write permissions to the the mapped region. + */ + addr = mmap(0, map_len, PROT_READ | PROT_WRITE, \ + MAP_FILE | MAP_SHARED, fildes, 0); + + /* check for the return value of mmap system call */ + if (addr == (char *)MAP_FAILED) { + tst_brkm(TBROK, cleanup, "mmap() Failed on %s, errno=%d : %s", + TEMPFILE, errno, strerror(errno)); + tst_exit(); + } +} + +/* + * sig_handler() - signal catching function. + * This function is used to trap the signal generated when tried to read or + * write to the memory mapped region which is already detached from the + * calling process address space. + * this function is invoked when SIGSEGV generated and it calls test + * cleanup function and exit the program. + */ +void +sig_handler() +{ + tst_resm(TPASS, "Functionality of munmap() successful"); + + /* Invoke test cleanup function and exit */ + cleanup(); + + /* exit with return code appropriate for results */ + tst_exit(); +} + +/* + * cleanup() - performs all ONE TIME cleanup for this test at + * completion or premature exit. + * Close the temporary file. + * Remove the temporary directory. + */ +void +cleanup() +{ + /* + * print timing stats if that option was specified. + * print errno log if that option was specified. + */ + TEST_CLEANUP; + + /* Close the temporary file */ + if (close(fildes) < 0) { + tst_brkm(TFAIL, NULL, "close() on %s Failed, errno=%d : %s", + TEMPFILE, errno, strerror(errno)); + } + + /* Remove the temporary directory and all files in it */ + tst_rmdir(); +} |