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 22 #include <signal.h> 23 #include <stdio.h> 24 #include <stdlib.h> 25 #include "posixtest.h" 26 27 #define SIGTOTEST SIGUSR1 28 29 static stack_t alternate_s; 30 31 void handler() 32 { 33 stack_t handler_s; 34 35 if (sigaltstack(NULL, &handler_s) == -1) { 36 perror 37 ("Unexpected error while attempting to setup test pre-conditions"); 38 exit(PTS_UNRESOLVED); 39 } 40 41 if (handler_s.ss_flags != SS_DISABLE) { 42 printf 43 ("Test FAILED: The alternate stack's ss_flags member does not contain SS_DISABLE even though the alternate signal stack is disabled.\n"); 44 exit(PTS_FAIL); 45 } 46 } 47 48 int main(void) 49 { 50 51 struct sigaction act; 52 act.sa_flags = SA_ONSTACK; 53 act.sa_handler = handler; 54 sigemptyset(&act.sa_mask); 55 56 if (sigaction(SIGTOTEST, &act, 0) == -1) { 57 perror 58 ("Unexpected error while attempting to setup test pre-conditions"); 59 return PTS_UNRESOLVED; 60 } 61 62 if ((alternate_s.ss_sp = malloc(SIGSTKSZ)) == NULL) { 63 perror 64 ("Unexpected error while attempting to setup test pre-conditions"); 65 return PTS_UNRESOLVED; 66 } 67 68 alternate_s.ss_flags = SS_DISABLE; 69 alternate_s.ss_size = SIGSTKSZ; 70 71 if (sigaltstack(&alternate_s, NULL) == -1) { 72 perror 73 ("Unexpected error while attempting to setup test pre-conditions"); 74 return PTS_UNRESOLVED; 75 } 76 77 if (raise(SIGTOTEST) == -1) { 78 perror 79 ("Unexpected error while attempting to setup test pre-conditions"); 80 return PTS_UNRESOLVED; 81 } 82 83 printf("Test PASSED\n"); 84 return PTS_PASS; 85 } 86
