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 (altstack1)
15 - call sigaltstack() to define the alternate signal stack
16 - raise SIGTOTEST
17 - Inside the handler, try to change the alternate signal stack to altstack2, and verify
18 that the attempt fails.
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 altstack1;
31
handler()32 void handler()
33 {
34 stack_t altstack2;
35
36 if ((altstack2.ss_sp = malloc(SIGSTKSZ)) == NULL) {
37 perror
38 ("Unexpected error while attempting to setup test pre-conditions");
39 exit(PTS_UNRESOLVED);
40 }
41
42 altstack2.ss_flags = 0;
43 altstack2.ss_size = SIGSTKSZ;
44
45 if (sigaltstack(&altstack2, NULL) != -1) {
46 printf
47 ("Test FAILED: Attempt to set change alternate stack while inside handler succeeded.\n");
48 exit(PTS_FAIL);
49 }
50 }
51
main(void)52 int main(void)
53 {
54
55 struct sigaction act;
56 act.sa_flags = SA_ONSTACK;
57 act.sa_handler = handler;
58 sigemptyset(&act.sa_mask);
59
60 if (sigaction(SIGTOTEST, &act, 0) == -1) {
61 perror
62 ("Unexpected error while attempting to setup test pre-conditions");
63 return PTS_UNRESOLVED;
64 }
65
66 if ((altstack1.ss_sp = malloc(SIGSTKSZ)) == NULL) {
67 perror
68 ("Unexpected error while attempting to setup test pre-conditions");
69 return PTS_UNRESOLVED;
70 }
71
72 altstack1.ss_flags = 0;
73 altstack1.ss_size = SIGSTKSZ;
74
75 if (sigaltstack(&altstack1, NULL) == -1) {
76 perror
77 ("Unexpected error while attempting to setup test pre-conditions");
78 return PTS_UNRESOLVED;
79 }
80
81 if (raise(SIGTOTEST) == -1) {
82 perror
83 ("Unexpected error while attempting to setup test pre-conditions");
84 return PTS_UNRESOLVED;
85 }
86
87 printf("Test PASSED\n");
88 return PTS_PASS;
89 }
90