302 lines
8.3 KiB
C
302 lines
8.3 KiB
C
/*
|
|
*
|
|
* 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 <sys/types.h>
|
|
#include <errno.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"
|
|
|
|
const 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(void) __attribute__((noreturn)); /* 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 */
|
|
volatile 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))
|
|
!= (int)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();
|
|
}
|