| /* |
| * |
| * 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: munmap03 |
| * |
| * Test Description: |
| * Verify that, munmap call will fail to unmap a mapped file or anonymous |
| * shared memory region from the calling process's address space if the |
| * address and the length of the region to be unmapped points outside the |
| * calling process's address space |
| * |
| * Expected Result: |
| * munmap call should fail with return value -1 and sets errno EINVAL. |
| * |
| * 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) |
| * if errno set == expected errno |
| * Issue sys call fails with expected return value and errno. |
| * Otherwise, |
| * Issue sys call fails with unexpected errno. |
| * Otherwise, |
| * Issue sys call returns unexpected value. |
| * |
| * Cleanup: |
| * Print errno log and/or timing stats if options given |
| * Delete the temporary directory(s)/file(s) created. |
| * |
| * Usage: <for command-line> |
| * munmap03 [-c n] [-e] [-i n] [-I x] [-P x] [-t] |
| * where, -c n : Run n copies concurrently. |
| * -e : Turn on errno logging. |
| * -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/mman.h> |
| #include <sys/resource.h> |
| #include <sys/stat.h> |
| |
| #include "test.h" |
| #include "usctest.h" |
| |
| #define TEMPFILE "mmapfile" |
| |
| char *TCID="munmap03"; /* 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 */ |
| char *faddr; /* addr of memory mapped region */ |
| int fildes; /* file descriptor for tempfile */ |
| size_t map_len; /* length of the region to be mapped */ |
| |
| int exp_enos[]={EINVAL, 0}; |
| |
| void setup(); /* Main setup function of test */ |
| void cleanup(); /* cleanup function for the test */ |
| |
| int |
| main(int ac, char **av) |
| { |
| int lc; /* loop counter */ |
| 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); |
| } |
| |
| /* set the expected errnos... */ |
| TEST_EXP_ENOS(exp_enos); |
| |
| /* 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(); |
| |
| /* |
| * Attempt to unmap the mapped region of the temporary file |
| * from the address that points outside the process's |
| * address space. |
| */ |
| TEST(munmap(addr, map_len)); |
| |
| /* Check for the return value of munmap() */ |
| if (TEST_RETURN != -1) { |
| tst_resm(TFAIL, "munmap() returned %d, expected -1", |
| TEST_RETURN); |
| continue; |
| } |
| |
| TEST_ERROR_LOG(TEST_ERRNO); |
| |
| /* Check for expected errno. */ |
| if (TEST_ERRNO == EINVAL) { |
| tst_resm(TPASS, "munmap() fails, mapped address is " |
| "invalid, errno:%d", TEST_ERRNO); |
| } else { |
| tst_resm(TFAIL, "munmap() fails, invalid errno:%d, " |
| "expected:%d", TEST_ERRNO, EINVAL); |
| } |
| |
| /* Call cleanup() to undo setup done for the test. */ |
| cleanup(); |
| |
| } /* End for TEST_LOOPING */ |
| |
| /* exit with return code appropriate for results */ |
| tst_exit(); |
| |
| /*NOTREACHED*/ |
| return 0; |
| |
| } /* End main */ |
| |
| /* |
| * setup() - performs all ONE TIME setup for this test. |
| * |
| * 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() |
| { |
| struct rlimit brkval; /* variable to hold max. break val */ |
| |
| /* capture signals */ |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| /* Pause if that option was specified */ |
| TEST_PAUSE; |
| |
| /* call getrlimit function to get the maximum possible break value */ |
| getrlimit(RLIMIT_DATA, &brkval); |
| |
| /* 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. |
| */ |
| #ifdef UCLINUX |
| /* MAP_SHARED not implemented on uClinux */ |
| faddr = mmap(0, map_len, PROT_READ | PROT_WRITE, \ |
| MAP_FILE | MAP_PRIVATE, fildes, 0); |
| #else |
| faddr = mmap(0, map_len, PROT_READ | PROT_WRITE, \ |
| MAP_FILE | MAP_SHARED, fildes, 0); |
| #endif |
| |
| /* check for the return value of mmap system call */ |
| if (faddr == (char *)MAP_FAILED) { |
| tst_brkm(TBROK, cleanup, "mmap() Failed on %s, errno=%d : %s", |
| TEMPFILE, errno, strerror(errno)); |
| tst_exit(); |
| } |
| |
| /* convert the MAX. possible break value */ |
| addr = (char *) brkval.rlim_max; |
| } |
| |
| /* |
| * cleanup() - performs all ONE TIME cleanup for this test at |
| * completion or premature exit. |
| * Unmap the mapped region of the file. |
| * 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; |
| |
| /* |
| * unmap the mapped region of the file from the process |
| * address space |
| */ |
| if (munmap(faddr, map_len) < 0) { |
| tst_brkm(TBROK, NULL, "munmap() fails to unmap the mapped " |
| "region of the file"); |
| } |
| |
| /* Close the temporary file */ |
| if (close(fildes) < 0) { |
| tst_brkm(TBROK, NULL, "close() on %s Failed, errno=%d : %s", |
| TEMPFILE, errno, strerror(errno)); |
| } |
| |
| /* Remove the temporary directory and all files in it */ |
| tst_rmdir(); |
| } |