| /* |
| * 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 if ss_flags is set to SS_DISABLE, then |
| the alternate stack is disabled. |
| |
| Steps: |
| - Set up a handler for signal SIGTOTEST and set the sa_flags member to SA_ONSTACK. |
| - Using the first call to sigaltstack(), get the process's current stack info (original_s.) |
| - Allocate memory for the alternate signal stack (alternate_s.) |
| - call sigaltstack() to define the alternate signal stack, and set ss_flags to SS_DISABLE |
| - raise SIGTOTEST |
| - Inside the handler, use sigaltstack() to obtain the current stack that the handler is |
| executing on (handler_s) and verify that: |
| 1. The ss_sp member of the handler_s is equal to that of original_s. |
| 2. The ss_size member of the hanlder_s is equal to that of original_s. |
| */ |
| |
| |
| #include <signal.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include "posixtest.h" |
| |
| #define SIGTOTEST SIGUSR1 |
| |
| static stack_t alternate_s, original_s; |
| |
| void handler() |
| { |
| |
| stack_t handler_s; |
| |
| if (sigaltstack(NULL, &handler_s) == -1) { |
| perror |
| ("Unexpected error while attempting to setup test pre-conditions"); |
| exit(PTS_UNRESOLVED); |
| } |
| |
| if (handler_s.ss_sp != original_s.ss_sp) { |
| printf |
| ("Test FAILED: ss_sp of the handler's stack changed even though SS_DISABLE was set\n"); |
| exit(PTS_FAIL); |
| } |
| |
| if (handler_s.ss_size != original_s.ss_size) { |
| printf |
| ("Test FAILED: ss_size of the handler's stack changed even though SS_DISABLE was set\n"); |
| exit(PTS_FAIL); |
| } |
| |
| } |
| |
| int main(void) |
| { |
| |
| 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 (sigaltstack(NULL, &original_s) == -1) { |
| perror |
| ("Unexpected error while attempting to setup test pre-conditions"); |
| return PTS_UNRESOLVED; |
| } |
| |
| if ((alternate_s.ss_sp = malloc(SIGSTKSZ)) == NULL) { |
| perror |
| ("Unexpected error while attempting to setup test pre-conditions"); |
| return PTS_UNRESOLVED; |
| } |
| |
| alternate_s.ss_flags = SS_DISABLE; |
| alternate_s.ss_size = SIGSTKSZ; |
| |
| if (sigaltstack(&alternate_s, NULL) == -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; |
| } |