129 lines
2.8 KiB
C
129 lines
2.8 KiB
C
/*
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* Copyright (c) International Business Machines Corp., 2003.
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* Copyright (c) 2012 Wanlong Gao <gaowanlong@cn.fujitsu.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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*/
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/*
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* This is a test for a glibc bug for the clone(2) system call.
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*/
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#if defined UCLINUX && !__THROW
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/* workaround for libc bug */
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#define __THROW
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#endif
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#include <errno.h>
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#include <sched.h>
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#include <sys/wait.h>
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#include "test.h"
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#include "clone_platform.h"
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#define TRUE 1
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#define FALSE 0
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static void setup();
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static int do_child();
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char *TCID = "clone07";
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int TST_TOTAL = 1;
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static void sigsegv_handler(int);
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static void sigusr2_handler(int);
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static int child_pid;
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static int fail = FALSE;
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int main(int ac, char **av)
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{
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int lc, status;
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void *child_stack;
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tst_parse_opts(ac, av, NULL, NULL);
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setup();
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for (lc = 0; TEST_LOOPING(lc); lc++) {
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tst_count = 0;
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child_stack = malloc(CHILD_STACK_SIZE);
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if (child_stack == NULL)
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tst_brkm(TBROK, NULL,
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"Cannot allocate stack for child");
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child_pid = ltp_clone(SIGCHLD, do_child, NULL,
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CHILD_STACK_SIZE, child_stack);
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if (child_pid < 0)
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tst_brkm(TBROK | TERRNO, NULL, "clone failed");
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if ((wait(&status)) == -1)
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tst_brkm(TBROK | TERRNO, NULL,
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"wait failed, status: %d", status);
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free(child_stack);
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}
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if (fail == FALSE)
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tst_resm(TPASS,
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"Use of return() in child did not cause SIGSEGV");
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else
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tst_resm(TFAIL, "Use of return() in child caused SIGSEGV");
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tst_exit();
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}
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static void setup(void)
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{
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struct sigaction def_act;
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struct sigaction act;
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TEST_PAUSE;
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act.sa_handler = sigsegv_handler;
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act.sa_flags = SA_RESTART;
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sigemptyset(&act.sa_mask);
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if ((sigaction(SIGSEGV, &act, NULL)) == -1)
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tst_resm(TWARN | TERRNO,
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"sigaction() for SIGSEGV failed in test_setup()");
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/* Setup signal handler for SIGUSR2 */
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def_act.sa_handler = sigusr2_handler;
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def_act.sa_flags = SA_RESTART | SA_RESETHAND;
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sigemptyset(&def_act.sa_mask);
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if ((sigaction(SIGUSR2, &def_act, NULL)) == -1)
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tst_resm(TWARN | TERRNO,
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"sigaction() for SIGUSR2 failed in test_setup()");
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}
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static int do_child(void)
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{
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return 0;
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}
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static void sigsegv_handler(int sig)
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{
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if (child_pid == 0) {
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kill(getppid(), SIGUSR2);
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_exit(42);
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}
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}
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/* sig_default_handler() - Default handler for parent */
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static void sigusr2_handler(int sig)
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{
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if (child_pid != 0)
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fail = TRUE;
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}
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