238 lines
6.7 KiB
C
238 lines
6.7 KiB
C
/*
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*
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* Copyright (c) International Business Machines Corp., 2001
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* Test Name: mremap01
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*
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* Test Description:
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* Verify that, mremap() succeeds when used to expand the existing
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* virtual memory mapped region to the requested size where the
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* virtual memory area was previously mapped to a file using mmap().
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*
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* Expected Result:
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* mremap() should succeed returning the address of new virtual memory area.
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* The expanded mapped memory region should be accessible and able to
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* synchronize with the file.
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*
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* Algorithm:
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* Setup:
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* Setup signal handling.
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* Create temporary directory.
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* Pause for SIGUSR1 if option specified.
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*
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* Test:
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* Loop if the proper options are given.
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* Execute system call
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* Check return code, if system call failed (return=-1)
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* Log the errno and Issue a FAIL message.
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* Otherwise,
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* Verify the Functionality of system call
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* if successful,
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* Issue Functionality-Pass message.
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* Otherwise,
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* Issue Functionality-Fail message.
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* Cleanup:
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* Print errno log and/or timing stats if options given
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* Delete the temporary directory created.
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*
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* Usage: <for command-line>
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* mremap01 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
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* where, -c n : Run n copies concurrently.
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* -f : Turn off functionality Testing.
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* -i n : Execute test n times.
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* -I x : Execute test for x seconds.
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* -P x : Pause for x seconds between iterations.
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* -t : Turn on syscall timing.
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*
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* HISTORY
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* 07/2001 Ported by Wayne Boyer
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*
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* 11/09/2001 Manoj Iyer (manjo@austin.ibm.com)
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* Modified.
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* - #include <linux/mman.h> should not be included as per man page for
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* mremap, #include <sys/mman.h> alone should do the job. But inorder
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* to include definition of MREMAP_MAYMOVE defined in bits/mman.h
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* (included by sys/mman.h) __USE_GNU needs to be defined.
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* There may be a more elegant way of doing this...
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*
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* RESTRICTIONS:
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* None.
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*/
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#define _GNU_SOURCE
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#include <unistd.h>
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#include <errno.h>
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#include <sys/mman.h>
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#include <fcntl.h>
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#include "test.h"
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#include "safe_macros.h"
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#define TEMPFILE "mremapfile"
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char *TCID = "mremap01";
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int TST_TOTAL = 1;
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char *addr; /* addr of memory mapped region */
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int memsize; /* memory mapped size */
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int newsize; /* new size of virtual memory block */
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int fildes; /* file descriptor for tempfile */
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void setup(); /* Main setup function of test */
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void cleanup(); /* cleanup function for the test */
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int main(int ac, char **av)
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{
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int ind; /* counter variable */
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tst_parse_opts(ac, av, NULL, NULL);
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tst_count = 0;
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setup();
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/*
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* Call mremap to expand the existing mapped
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* memory region (memsize) by newsize limits.
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*/
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addr = mremap(addr, memsize, newsize, MREMAP_MAYMOVE);
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/* Check for the return value of mremap() */
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if (addr == MAP_FAILED)
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tst_brkm(TFAIL | TERRNO, cleanup, "mremap failed");
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/*
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* Attempt to initialize the expanded memory
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* mapped region with data. If the map area
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* was bad, we'd get SIGSEGV.
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*/
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for (ind = 0; ind < newsize; ind++) {
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addr[ind] = (char)ind;
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}
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/*
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* Memory mapped area is good. Now, attempt
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* to synchronize the mapped memory region
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* with the file.
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*/
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if (msync(addr, newsize, MS_SYNC) != 0) {
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tst_resm(TFAIL | TERRNO, "msync failed to synch "
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"mapped file");
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} else {
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tst_resm(TPASS, "Functionality of "
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"mremap() is correct");
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}
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cleanup();
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tst_exit();
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}
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/*
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* void
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* setup() - performs all ONE TIME setup for this test.
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*
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* Get system page size, Set the size of virtual memory area and the
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* new size after resize,
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* Creat a temporary directory and a file under it.
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* Stratch the file size to the size of virtual memory area and
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* write 1 byte (\0). Map the temporary file for the length of virtual
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* memory (memsize) into memory.
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*/
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void setup(void)
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{
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int pagesz; /* system's page size */
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tst_sig(NOFORK, DEF_HANDLER, cleanup);
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TEST_PAUSE;
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/* Get the system page size */
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if ((pagesz = getpagesize()) < 0) {
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tst_brkm(TFAIL, NULL,
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"getpagesize failed to get system page size");
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}
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/* Get the size of virtual memory area to be mapped */
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memsize = (1000 * pagesz);
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/* Get the New size of virtual memory block after resize */
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newsize = (memsize * 2);
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tst_tmpdir();
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/* Creat a temporary file used for mapping */
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if ((fildes = open(TEMPFILE, O_RDWR | O_CREAT, 0666)) < 0)
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tst_brkm(TBROK | TERRNO, cleanup, "opening %s failed",
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TEMPFILE);
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/* Stretch the file to the size of virtual memory area */
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if (lseek(fildes, (off_t) memsize, SEEK_SET) != (off_t) memsize) {
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tst_brkm(TBROK | TERRNO, cleanup,
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"lseeking to %d offset pos. failed", memsize);
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}
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/* Write one byte data into temporary file */
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if (write(fildes, "\0", 1) != 1) {
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tst_brkm(TBROK, cleanup, "writing to %s failed", TEMPFILE);
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}
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/*
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* Call mmap to map virtual memory (memsize bytes) from the
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* beginning of temporary file (offset is 0) into memory.
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*/
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addr = mmap(0, memsize, PROT_WRITE, MAP_SHARED, fildes, 0);
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/* Check for the return value of mmap() */
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if (addr == (char *)MAP_FAILED) {
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tst_brkm(TBROK, cleanup, "mmaping Failed on %s", TEMPFILE);
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}
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/* Stretch the file to newsize of virtual memory block */
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if (lseek(fildes, (off_t) newsize, SEEK_SET) != (off_t) newsize) {
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tst_brkm(TBROK, cleanup, "lseek() to %d offset pos. Failed, "
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"error=%d : %s", newsize, errno, strerror(errno));
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}
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/* Write one byte data into temporary file */
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if (write(fildes, "\0", 1) != 1) {
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tst_brkm(TBROK | TERRNO, cleanup, "writing to %s failed",
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TEMPFILE);
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}
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}
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/*
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* void
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* cleanup() - performs all ONE TIME cleanup for this test at
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* completion or premature exit.
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* Unmap the mapped memory area done in the test.
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* Close the temporary file.
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* Remove the temporary directory.
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*/
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void cleanup(void)
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{
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/* Unmap the mapped memory */
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if (munmap(addr, newsize) != 0)
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tst_brkm(TBROK | TERRNO, NULL, "munmap failed");
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/* Close the temporary file */
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SAFE_CLOSE(NULL, fildes);
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tst_rmdir();
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}
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