| /* |
| * Copyright (c) International Business Machines Corp., 2003. |
| * Copyright (c) 2012 Wanlong Gao <gaowanlong@cn.fujitsu.com> |
| * |
| * 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., |
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| */ |
| /* |
| * This is a test for a glibc bug for the clone(2) system call. |
| */ |
| |
| #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 "clone_platform.h" |
| |
| #define TRUE 1 |
| #define FALSE 0 |
| |
| static void setup(); |
| static int do_child(); |
| |
| char *TCID = "clone07"; |
| int TST_TOTAL = 1; |
| |
| static void sigsegv_handler(int); |
| static void sigusr2_handler(int); |
| static int child_pid; |
| static int fail = FALSE; |
| |
| int main(int ac, char **av) |
| { |
| |
| int lc, status; |
| void *child_stack; |
| |
| tst_parse_opts(ac, av, NULL, NULL); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| tst_count = 0; |
| child_stack = malloc(CHILD_STACK_SIZE); |
| if (child_stack == NULL) |
| tst_brkm(TBROK, NULL, |
| "Cannot allocate stack for child"); |
| |
| child_pid = ltp_clone(SIGCHLD, do_child, NULL, |
| CHILD_STACK_SIZE, child_stack); |
| |
| if (child_pid < 0) |
| tst_brkm(TBROK | TERRNO, NULL, "clone failed"); |
| |
| if ((wait(&status)) == -1) |
| tst_brkm(TBROK | TERRNO, NULL, |
| "wait failed, status: %d", status); |
| |
| free(child_stack); |
| } |
| |
| 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"); |
| |
| tst_exit(); |
| } |
| |
| static void setup(void) |
| { |
| struct sigaction def_act; |
| struct sigaction act; |
| |
| TEST_PAUSE; |
| |
| act.sa_handler = sigsegv_handler; |
| act.sa_flags = SA_RESTART; |
| sigemptyset(&act.sa_mask); |
| 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; |
| sigemptyset(&def_act.sa_mask); |
| |
| if ((sigaction(SIGUSR2, &def_act, NULL)) == -1) |
| tst_resm(TWARN | TERRNO, |
| "sigaction() for SIGUSR2 failed in test_setup()"); |
| } |
| |
| static int do_child(void) |
| { |
| return 0; |
| } |
| |
| static void sigsegv_handler(int sig) |
| { |
| if (child_pid == 0) { |
| kill(getppid(), SIGUSR2); |
| _exit(42); |
| } |
| } |
| |
| /* sig_default_handler() - Default handler for parent */ |
| static void sigusr2_handler(int sig) |
| { |
| if (child_pid != 0) |
| fail = TRUE; |
| } |