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: 19 1. The ss_sp member of the obtained alternate signal stack is equal to the ss_sp 20 that we defined in the main() function. 21 2. The ss_size member of the obtained alternate signal stack is equal to the ss_size 22 that we defined in the main() function. 23 */ 24 25 #define _XOPEN_SOURCE 600 26 27 #include <signal.h> 28 #include <stdio.h> 29 #include <stdlib.h> 30 #include "posixtest.h" 31 32 #define SIGTOTEST SIGUSR1 33 34 static stack_t alternate_s; 35 handler()36void handler() 37 { 38 39 stack_t handler_s; 40 41 if (sigaltstack(NULL, &handler_s) == -1) { 42 perror 43 ("Unexpected error while attempting to setup test pre-conditions"); 44 exit(PTS_UNRESOLVED); 45 } 46 47 if (handler_s.ss_sp != alternate_s.ss_sp) { 48 printf 49 ("Test FAILED: ss_sp of the stack is not same as the defined one\n"); 50 exit(PTS_FAIL); 51 } 52 53 if (handler_s.ss_size != alternate_s.ss_size) { 54 printf 55 ("Test FAILED: ss_size of the stack is not same as the defined one\n"); 56 exit(PTS_FAIL); 57 } 58 59 } 60 main(void)61int main(void) 62 { 63 64 struct sigaction act; 65 act.sa_flags = SA_ONSTACK; 66 act.sa_handler = handler; 67 sigemptyset(&act.sa_mask); 68 69 if (sigaction(SIGTOTEST, &act, 0) == -1) { 70 perror 71 ("Unexpected error while attempting to setup test pre-conditions"); 72 return PTS_UNRESOLVED; 73 } 74 75 if ((alternate_s.ss_sp = malloc(SIGSTKSZ)) == NULL) { 76 perror 77 ("Unexpected error while attempting to setup test pre-conditions"); 78 return PTS_UNRESOLVED; 79 } 80 81 alternate_s.ss_flags = 0; 82 alternate_s.ss_size = SIGSTKSZ; 83 84 if (sigaltstack(&alternate_s, NULL) == -1) { 85 perror 86 ("Unexpected error while attempting to setup test pre-conditions"); 87 return PTS_UNRESOLVED; 88 } 89 90 if (raise(SIGTOTEST) == -1) { 91 perror 92 ("Unexpected error while attempting to setup test pre-conditions"); 93 return PTS_UNRESOLVED; 94 } 95 96 printf("Test PASSED\n"); 97 return PTS_PASS; 98 } 99