| /* |
| * Copyright (c) 2002-2003, Intel Corporation. All rights reserved. |
| * Created by: salwan.searty REMOVE-THIS AT intel DOT com |
| * This file is licensed under the GPL license. For the full content |
| * of this license, see the COPYING file at the top level of this |
| * source tree. |
| |
| This program tests the assertion that a signal explicitly declared to execute on |
| an alternate stack (using sigaltstack) shall be delivered on the alternate stack |
| specified by ss. |
| |
| While it is easy to use a call like sigaltstack((stack_t *)0, &oss) to verify |
| that the signal stack that the handler is being executed on is the same alternate |
| signal stack ss that I defined for that signal, I do not want to rely of the |
| use of oss since we're testing sigaltstack(). |
| |
| Instead, what I do is declare an integer i inside the handler and verify that |
| at least the address of i is located between ss.ss_sp and ss.ss_size. |
| |
| */ |
| |
| #define _XOPEN_SOURCE 600 |
| |
| #include <signal.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include "posixtest.h" |
| |
| #define SIGTOTEST SIGUSR1 |
| |
| stack_t alternate_s; |
| |
| void handler(int signo) |
| { |
| int i = 0; |
| if ((void*)&i < (alternate_s.ss_sp) || (long)&i>=((long)alternate_s.ss_sp + (long)alternate_s.ss_size)) { |
| |
| printf("Test FAILED: address of local variable is not inside the memory allocated for the alternate signal stack\n"); |
| exit(PTS_FAIL); |
| } |
| } |
| |
| int main() |
| { |
| |
| struct sigaction act; |
| act.sa_flags = SA_ONSTACK; |
| act.sa_handler = handler; |
| sigemptyset(&act.sa_mask); |
| |
| if (sigaction(SIGUSR1, &act, 0) == -1) { |
| perror("Unexpected error while attempting to setup test pre-conditions"); |
| return PTS_UNRESOLVED; |
| } |
| |
| if ((alternate_s.ss_sp = (void *)malloc(SIGSTKSZ)) == NULL) { |
| perror("Unexpected error while attempting to setup test pre-conditions"); |
| return PTS_UNRESOLVED; |
| } |
| |
| alternate_s.ss_flags = 0; |
| alternate_s.ss_size = SIGSTKSZ; |
| |
| if (sigaltstack(&alternate_s, (stack_t *)0) == -1) { |
| perror("Unexpected error while attempting to setup test pre-conditions"); |
| return PTS_UNRESOLVED; |
| } |
| |
| if (raise(SIGUSR1) == -1) { |
| perror("Unexpected error while attempting to setup test pre-conditions"); |
| return PTS_UNRESOLVED; |
| } |
| |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } |