| /* |
| * Copyright (c) International Business Machines Corp., 2003. |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of version 2 of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * You should have received a copy of the GNU General Public License along |
| * with this program; if not, write the Free Software Foundation, Inc., 59 |
| * Temple Place - Suite 330, Boston MA 02111-1307, USA. |
| * |
| */ |
| /********************************************************** |
| * |
| * TEST IDENTIFIER : clone07 |
| * |
| * EXECUTED BY : anyone |
| * |
| * TEST TITLE : glibc bug test for clone(2) |
| * |
| * TEST CASE TOTAL : 1 |
| * |
| * AUTHOR : Robbie Williamson <robbiew@us.ibm.com> |
| * |
| * SIGNALS |
| * Uses SIGUSR1 to pause before test if option set. |
| * (See the parse_opts(3) man page). |
| * |
| * DESCRIPTION |
| * This is a test for a glibc bug for the clone(2) system call. |
| * |
| * Setup: |
| * Setup signal handling. |
| * Pause for SIGUSR1 if option specified. |
| * |
| * Test: |
| * Loop if the proper options are given. |
| * Call clone() with only SIGCHLD flag |
| * |
| * CHILD: |
| * return 0; |
| * |
| * PARENT: |
| * wait for child to finish |
| * If a SIGSEGV is not received by the child for using return() |
| * test passed |
| * else |
| * test failed |
| * |
| * Cleanup: |
| * Print errno log and/or timing stats if options given |
| * |
| * USAGE: <for command-line> |
| * clone01 [-c n] [-e] [-i n] [-I x] [-P x] [-t] [-h] [-f] [-p] |
| * where, -c n : Run n copies concurrently. |
| * -e : Turn on errno logging. |
| * -h : Show help screen |
| * -f : Turn off functional testing |
| * -i n : Execute test n times. |
| * -I x : Execute test for x seconds. |
| * -p : Pause for SIGUSR1 before starting |
| * -P x : Pause for x seconds between iterations. |
| * -t : Turn on syscall timing. |
| * |
| ****************************************************************/ |
| |
| #if defined UCLINUX && !__THROW |
| /* workaround for libc bug */ |
| #define __THROW |
| #endif |
| |
| #include <errno.h> |
| #include <sched.h> |
| #include <sys/wait.h> |
| #include "test.h" |
| #include "usctest.h" |
| #include "clone_platform.h" |
| |
| #define TRUE 1 |
| #define FALSE 0 |
| |
| static void setup(); |
| static void cleanup(); |
| static int do_child(); |
| |
| char *TCID = "clone07"; /* Test program identifier. */ |
| int TST_TOTAL = 1; /* Total number of test cases. */ |
| extern int Tst_count; /* Test Case counter for tst_* routines */ |
| |
| void sigsegv_handler(int); |
| void sigusr2_handler(int); |
| static int child_pid; |
| static int fail = FALSE; |
| |
| int main(int ac, char **av) |
| { |
| |
| int lc; /* loop counter */ |
| char *msg; /* message returned from parse_opts */ |
| void *child_stack; /* stack for child */ |
| |
| /* parse standard options */ |
| if ((msg = parse_opts(ac, av, NULL, NULL)) |
| != NULL) { |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| } |
| |
| /* 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; |
| /* Allocate stack for child */ |
| if((child_stack = (void *) malloc(CHILD_STACK_SIZE)) == NULL) { |
| tst_brkm(TBROK, cleanup, "Cannot allocate stack for child"); |
| } |
| |
| |
| /* |
| * Call clone(2) |
| */ |
| child_pid = ltp_clone(SIGCHLD, do_child, NULL, |
| CHILD_STACK_SIZE, child_stack); |
| wait(NULL); |
| free(child_stack); |
| } /* End for TEST_LOOPING */ |
| |
| if (fail == FALSE) |
| tst_resm(TPASS, |
| "Use of return() in child did not cause SIGSEGV"); |
| else { |
| tst_resm(TFAIL, "Use of return() in child caused SIGSEGV"); |
| } |
| |
| cleanup(); |
| |
| return 0; |
| |
| } /* End main */ |
| |
| /* setup() - performs all ONE TIME setup for this test */ |
| void setup() |
| { |
| struct sigaction def_act; |
| struct sigaction act; |
| |
| /* Pause if that option was specified */ |
| TEST_PAUSE; |
| |
| act.sa_handler = sigsegv_handler; |
| act.sa_flags = SA_RESTART; |
| if ((sigaction(SIGSEGV, &act, NULL)) == -1) { |
| tst_resm(TWARN|TERRNO, |
| "sigaction() for SIGSEGV failed in test_setup()"); |
| } |
| |
| /* Setup signal handler for SIGUSR2 */ |
| def_act.sa_handler = sigusr2_handler; |
| def_act.sa_flags = SA_RESTART | SA_RESETHAND; |
| |
| if ((sigaction(SIGUSR2, &def_act, NULL)) == -1) { |
| tst_resm(TWARN|TERRNO, |
| "sigaction() for SIGUSR2 failed in test_setup()"); |
| } |
| |
| } /* End setup() */ |
| |
| /* |
| *cleanup() - performs all ONE TIME cleanup for this test at |
| * completion or premature exit. |
| */ |
| void cleanup() |
| { |
| |
| /* |
| * print timing stats if that option was specified. |
| * print errno log if that option was specified. |
| */ |
| TEST_CLEANUP; |
| |
| kill(child_pid, SIGKILL); |
| /* exit with return code appropriate for results */ |
| tst_exit(); |
| } /* End cleanup() */ |
| |
| /* |
| * do_child() - function executed by child |
| */ |
| int do_child(void) |
| { |
| return 0; |
| } |
| |
| void sigsegv_handler(int sig) |
| { |
| if (child_pid == 0) { |
| kill(getppid(), SIGUSR2); |
| _exit(42); |
| } |
| } |
| |
| /* sig_default_handler() - Default handler for parent */ |
| void sigusr2_handler(int sig) |
| { |
| if (child_pid != 0) { |
| fail = TRUE; |
| } |
| } |