1 /* 2 * Copyright (c) 2002-2003, Intel Corporation. All rights reserved. 3 * Created by: salwan.searty REMOVE-THIS AT intel DOT com 4 * This file is licensed under the GPL license. For the full content 5 * of this license, see the COPYING file at the top level of this 6 * source tree. 7 8 This program tests the assertion that if the ss_flags member is not set to SS_DISABLE, 9 the stack shall be enabled, and the ss_sp and ss_size members specify the new address 10 and size of the stack. 11 12 Steps: 13 - Set up a handler for signal SIGTOTEST and set the sa_flags member to SA_ONSTACK. 14 - Allocate memory for the alternate signal stack 15 - call sigaltstack() to define the alternate signal stack 16 - raise SIGTOTEST 17 - Inside the handler, use sigaltstack to examine/obtain the current alternate signal 18 stack and verify that the ss_flags member of the obtained alternate signal stack is SS_DISABLE. 19 */ 20 21 #define _XOPEN_SOURCE 600 22 23 #include <signal.h> 24 #include <stdio.h> 25 #include <stdlib.h> 26 #include "posixtest.h" 27 28 #define SIGTOTEST SIGUSR1 29 30 static stack_t alternate_s; 31 32 void handler() 33 { 34 stack_t handler_s; 35 36 if (sigaltstack(NULL, &handler_s) == -1) { 37 perror 38 ("Unexpected error while attempting to setup test pre-conditions"); 39 exit(PTS_UNRESOLVED); 40 } 41 42 if (handler_s.ss_flags != SS_DISABLE) { 43 printf 44 ("Test FAILED: The alternate stack's ss_flags member does not contain SS_DISABLE even though the alternate signal stack is disabled.\n"); 45 exit(PTS_FAIL); 46 } 47 } 48 49 int main(void) 50 { 51 52 struct sigaction act; 53 act.sa_flags = SA_ONSTACK; 54 act.sa_handler = handler; 55 sigemptyset(&act.sa_mask); 56 57 if (sigaction(SIGTOTEST, &act, 0) == -1) { 58 perror 59 ("Unexpected error while attempting to setup test pre-conditions"); 60 return PTS_UNRESOLVED; 61 } 62 63 if ((alternate_s.ss_sp = malloc(SIGSTKSZ)) == NULL) { 64 perror 65 ("Unexpected error while attempting to setup test pre-conditions"); 66 return PTS_UNRESOLVED; 67 } 68 69 alternate_s.ss_flags = SS_DISABLE; 70 alternate_s.ss_size = SIGSTKSZ; 71 72 if (sigaltstack(&alternate_s, NULL) == -1) { 73 perror 74 ("Unexpected error while attempting to setup test pre-conditions"); 75 return PTS_UNRESOLVED; 76 } 77 78 if (raise(SIGTOTEST) == -1) { 79 perror 80 ("Unexpected error while attempting to setup test pre-conditions"); 81 return PTS_UNRESOLVED; 82 } 83 84 printf("Test PASSED\n"); 85 return PTS_PASS; 86 } 87
