| /* |
| * |
| * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| /* |
| * Test Name: mremap01 |
| * |
| * Test Description: |
| * Verify that, mremap() succeeds when used to expand the existing |
| * virtual memory mapped region to the requested size where the |
| * virtual memory area was previously mapped to a file using mmap(). |
| * |
| * Expected Result: |
| * mremap() should succeed returning the address of new virtual memory area. |
| * The expanded mapped memory region should be accessible and able to |
| * synchronize with the file. |
| * |
| * 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> |
| * mremap01 [-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 |
| * |
| * 11/09/2001 Manoj Iyer (manjo@austin.ibm.com) |
| * Modified. |
| * - #include <linux/mman.h> should not be included as per man page for |
| * mremap, #include <sys/mman.h> alone should do the job. But inorder |
| * to include definition of MREMAP_MAYMOVE defined in bits/mman.h |
| * (included by sys/mman.h) __USE_GNU needs to be defined. |
| * There may be a more elegant way of doing this... |
| * |
| * RESTRICTIONS: |
| * None. |
| */ |
| #include <unistd.h> |
| #include <errno.h> |
| #define __USE_GNU |
| #include <sys/mman.h> |
| #undef __USE_GNU |
| #include <fcntl.h> |
| |
| #include "test.h" |
| |
| #define TEMPFILE "mremapfile" |
| |
| char *TCID = "mremap01"; |
| int TST_TOTAL = 1; |
| char *addr; /* addr of memory mapped region */ |
| int memsize; /* memory mapped size */ |
| int newsize; /* new size of virtual memory block */ |
| int fildes; /* file descriptor for tempfile */ |
| |
| void setup(); /* Main setup function of test */ |
| void cleanup(); /* cleanup function for the test */ |
| |
| int main(int ac, char **av) |
| { |
| const char *msg; |
| int ind; /* counter variable */ |
| |
| if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| tst_count = 0; |
| |
| setup(); |
| |
| /* |
| * Call mremap to expand the existing mapped |
| * memory region (memsize) by newsize limits. |
| */ |
| addr = mremap(addr, memsize, newsize, MREMAP_MAYMOVE); |
| |
| /* Check for the return value of mremap() */ |
| if (addr == MAP_FAILED) |
| tst_brkm(TFAIL | TERRNO, cleanup, "mremap failed"); |
| |
| /* |
| * Attempt to initialize the expanded memory |
| * mapped region with data. If the map area |
| * was bad, we'd get SIGSEGV. |
| */ |
| for (ind = 0; ind < newsize; ind++) { |
| addr[ind] = (char)ind; |
| } |
| |
| /* |
| * Memory mapped area is good. Now, attempt |
| * to synchronize the mapped memory region |
| * with the file. |
| */ |
| if (msync(addr, newsize, MS_SYNC) != 0) { |
| tst_resm(TFAIL | TERRNO, "msync failed to synch " |
| "mapped file"); |
| } else { |
| tst_resm(TPASS, "Functionality of " |
| "mremap() is correct"); |
| } |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| /* |
| * void |
| * setup() - performs all ONE TIME setup for this test. |
| * |
| * Get system page size, Set the size of virtual memory area and the |
| * new size after resize, |
| * Creat a temporary directory and a file under it. |
| * Stratch the file size to the size of virtual memory area and |
| * write 1 byte (\0). Map the temporary file for the length of virtual |
| * memory (memsize) into memory. |
| */ |
| void setup(void) |
| { |
| int pagesz; /* system's page size */ |
| |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| |
| /* Get the system page size */ |
| if ((pagesz = getpagesize()) < 0) { |
| tst_brkm(TFAIL, NULL, |
| "getpagesize failed to get system page size"); |
| } |
| |
| /* Get the size of virtual memory area to be mapped */ |
| memsize = (1000 * pagesz); |
| |
| /* Get the New size of virtual memory block after resize */ |
| newsize = (memsize * 2); |
| |
| tst_tmpdir(); |
| |
| /* Creat a temporary file used for mapping */ |
| if ((fildes = open(TEMPFILE, O_RDWR | O_CREAT, 0666)) < 0) |
| tst_brkm(TBROK | TERRNO, cleanup, "opening %s failed", |
| TEMPFILE); |
| |
| /* Stretch the file to the size of virtual memory area */ |
| if (lseek(fildes, (off_t) memsize, SEEK_SET) != (off_t) memsize) { |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "lseeking to %d offset pos. failed", memsize); |
| } |
| |
| /* Write one byte data into temporary file */ |
| if (write(fildes, "\0", 1) != 1) { |
| tst_brkm(TBROK, cleanup, "writing to %s failed", TEMPFILE); |
| } |
| |
| /* |
| * Call mmap to map virtual memory (memsize bytes) from the |
| * beginning of temporary file (offset is 0) into memory. |
| */ |
| addr = mmap(0, memsize, PROT_WRITE, MAP_SHARED, fildes, 0); |
| |
| /* Check for the return value of mmap() */ |
| if (addr == (char *)MAP_FAILED) { |
| tst_brkm(TBROK, cleanup, "mmaping Failed on %s", TEMPFILE); |
| } |
| |
| /* Stretch the file to newsize of virtual memory block */ |
| if (lseek(fildes, (off_t) newsize, SEEK_SET) != (off_t) newsize) { |
| tst_brkm(TBROK, cleanup, "lseek() to %d offset pos. Failed, " |
| "error=%d : %s", newsize, errno, strerror(errno)); |
| } |
| |
| /* Write one byte data into temporary file */ |
| if (write(fildes, "\0", 1) != 1) { |
| tst_brkm(TBROK | TERRNO, cleanup, "writing to %s failed", |
| TEMPFILE); |
| } |
| } |
| |
| /* |
| * void |
| * cleanup() - performs all ONE TIME cleanup for this test at |
| * completion or premature exit. |
| * Unmap the mapped memory area done in the test. |
| * Close the temporary file. |
| * Remove the temporary directory. |
| */ |
| void cleanup(void) |
| { |
| |
| /* Unmap the mapped memory */ |
| if (munmap(addr, newsize) != 0) |
| tst_brkm(TBROK | TERRNO, NULL, "munmap failed"); |
| |
| /* Close the temporary file */ |
| if (close(fildes) < 0) { |
| tst_brkm(TBROK, NULL, "closing %s failed", TEMPFILE); |
| } |
| |
| tst_rmdir(); |
| } |