287 lines
6.8 KiB
C
287 lines
6.8 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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* NAME
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* shmat01.c
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*
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* DESCRIPTION
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* shmat01 - test that shmat() works correctly
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*
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* ALGORITHM
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* create a shared memory resouce with read/write permissions
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* loop if that option was specified
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* call shmat() with the TEST() macro using three valid conditions
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* check the return code
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* if failure, issue a FAIL message.
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* otherwise,
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* if doing functionality testing
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* check for the correct conditions after the call
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* if correct,
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* issue a PASS message
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* otherwise
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* issue a FAIL message
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* call cleanup
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*
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* USAGE: <for command-line>
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* shmat01 [-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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* 03/2001 - Written by Wayne Boyer
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*
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* RESTRICTIONS
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* none
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*/
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#include "ipcshm.h"
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char *TCID = "shmat01";
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int TST_TOTAL = 3;
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extern int Tst_count;
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#define CASE0 10 /* values to write into the shared */
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#define CASE1 20 /* memory location. */
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#ifdef __ia64__
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#define UNALIGNED 0x5ff00eee /* an address not evenly divisible by */
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#elif defined __XTENSA__ /* SHMLBA which defaults to 0x8048e8b */
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/* TASK_SIZE on Xtensa is only 0x40000000 */
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#define UNALIGNED 0x28ffeeee
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#elif defined __arm__
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#define UNALIGNED 0x28ffeeee
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#else
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#define UNALIGNED 0x5fffeeee
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#endif
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int shm_id_1 = -1;
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void *addr; /* for result of shmat-call */
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struct test_case_t {
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int *shmid;
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void *addr;
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int flags;
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} TC[] = {
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/* a straight forward read/write attach */
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{&shm_id_1, 0, 0},
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/* an attach using non aligned memory */
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{&shm_id_1, (void *)UNALIGNED, SHM_RND},
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/* a read only attach */
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{&shm_id_1, 0, SHM_RDONLY}
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};
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int main(int ac, char **av)
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{
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int lc; /* loop counter */
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char *msg; /* message returned from parse_opts */
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int i;
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void check_functionality(int);
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/* parse standard options */
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if ((msg = parse_opts(ac, av, (option_t *)NULL, NULL)) != (char *)NULL){
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tst_brkm(TBROK, cleanup, "OPTION PARSING ERROR - %s", msg);
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}
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setup(); /* global setup */
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/* The following loop checks looping state if -i option given */
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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/* reset Tst_count in case we are looping */
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Tst_count = 0;
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/* loop through the test cases */
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for (i=0; i<TST_TOTAL; i++) {
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/*
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* Use TEST macro to make the call
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*/
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errno = 0;
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addr = shmat(*(TC[i].shmid), (void *)(TC[i].addr),
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TC[i].flags);
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TEST_ERRNO = errno;
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if (addr == (void *)-1) {
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tst_brkm(TFAIL, cleanup, "%s call failed - "
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"errno = %d : %s", TCID, TEST_ERRNO,
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strerror(TEST_ERRNO));
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} else {
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if (STD_FUNCTIONAL_TEST) {
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check_functionality(i);
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} else {
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tst_resm(TPASS, "call succeeded");
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}
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}
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/*
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* clean up things in case we are looping - in
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* this case, detach the shared memory
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*/
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if (shmdt((const void *)addr) == -1) {
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tst_brkm(TBROK, cleanup,
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"Couldn't detach shared memory");
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}
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}
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}
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cleanup();
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/*NOTREACHED*/
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return(0);
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}
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/*
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* check_functionality - check various conditions to make sure they
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* are correct.
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*/
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void
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check_functionality(int i)
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{
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void *orig_add;
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int *shared;
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int fail = 0;
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struct shmid_ds buf;
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shared = (int *)addr;
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/* stat the shared memory ID */
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if (shmctl(shm_id_1, IPC_STAT, &buf) == -1) {
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tst_brkm(TBROK, cleanup, "couldn't stat shared memory");
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}
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/* check the number of attaches */
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if (buf.shm_nattch != 1) {
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tst_resm(TFAIL, "# of attaches is incorrect");
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return;
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}
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/* check the size of the segment */
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if (buf.shm_segsz != INT_SIZE) {
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tst_resm(TFAIL, "segment size is incorrect");
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return;
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}
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/* check for specific conditions depending on the type of attach */
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switch(i) {
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case 0:
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/*
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* Check the functionality of the first call by simply
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* "writing" a value to the shared memory space.
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* If this fails the program will get a SIGSEGV, dump
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* core and exit.
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*/
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*shared = CASE0;
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break;
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case 1:
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/*
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* Check the functionality of the second call by writing
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* a value to the shared memory space and then checking
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* that the original address given was rounded down as
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* specified in the man page.
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*/
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*shared = CASE1;
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orig_add = (void *)((unsigned long)addr + (((unsigned long)TC[i].addr)%SHMLBA));
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if (orig_add != TC[i].addr) {
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tst_resm(TFAIL, "shared memory address is not "
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"correct");
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fail = 1;
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}
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break;
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case 2:
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/*
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* This time the shared memory is read only. Read the value
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* and check that it is equal to the value set in case #2,
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* because shared memory is persistent.
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*/
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if (*shared != CASE1) {
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tst_resm(TFAIL, "shared memory value isn't correct");
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fail = 1;
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}
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break;
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}
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if (!fail) {
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tst_resm(TPASS, "conditions and functionality are correct");
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}
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}
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/*
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* setup() - performs all the ONE TIME setup for this test.
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*/
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void
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setup(void)
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{
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/* capture signals */
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tst_sig(NOFORK, DEF_HANDLER, cleanup);
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/* Pause if that option was specified */
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TEST_PAUSE;
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/*
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* Create a temporary directory and cd into it.
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* This helps to ensure that a unique msgkey is created.
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* See ../lib/libipc.c for more information.
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*/
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tst_tmpdir();
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/* Get an IPC resouce key */
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shmkey = getipckey();
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/* create a shared memory resource with read and write permissions */
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if ((shm_id_1 = shmget(shmkey++, INT_SIZE, SHM_RW | IPC_CREAT |
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IPC_EXCL)) == -1) {
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tst_brkm(TBROK, cleanup, "Failed to create shared memory "
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"resource 1 in setup()");
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}
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}
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/*
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* cleanup() - performs all the ONE TIME cleanup for this test at completion
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* or premature exit.
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*/
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void
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cleanup(void)
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{
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/* if it exists, remove the shared memory resource */
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rm_shm(shm_id_1);
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/* Remove the temporary directory */
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tst_rmdir();
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/*
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* print timing stats if that option was specified.
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* print errno log if that option was specified.
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*/
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TEST_CLEANUP;
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/* exit with return code appropriate for results */
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tst_exit();
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}
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