1 // SPDX-License-Identifier: GPL-2.0-or-later
2
3 /*
4 * Copyright (c) International Business Machines Corp., 2001
5 * Ported by John George (2001)
6 * Copyright (C) 2024 SUSE LLC Andrea Manzini <[email protected]>
7 */
8
9 /*\
10 * [Description]
11 *
12 * Verify that sigaltstack() fails with return value -1 and set expected errno:
13 *
14 * - EINVAL on invalid value.
15 * - ENOMEM on stack is < MINSIGSTKSZ.
16 */
17
18 #include <stdlib.h>
19 #include "tst_test.h"
20
21 #define INVAL_FLAGS 9999
22
23 static stack_t sigstk;
24
25 static struct test_case {
26 int flag;
27 int size;
28 char *desc;
29 int exp_errno;
30 } tcases[] = {
31 {INVAL_FLAGS, SIGSTKSZ, "Invalid Flag value", EINVAL},
32 /* use value low enough for all kernel versions
33 * avoid using MINSIGSTKSZ defined by glibc as it could be different
34 * from the one in kernel ABI
35 */
36 {0, (2048 - 1), "alternate stack is < MINSIGSTKSZ", ENOMEM} };
37
check_sigaltstack(unsigned int nr)38 static void check_sigaltstack(unsigned int nr)
39 {
40 struct test_case *tc = &tcases[nr];
41
42 sigstk.ss_size = tc->size;
43 sigstk.ss_flags = tc->flag;
44 TST_EXP_FAIL(sigaltstack(&sigstk, NULL), tc->exp_errno, "%s", tc->desc);
45 }
46
setup(void)47 static void setup(void)
48 {
49 sigstk.ss_sp = SAFE_MALLOC(SIGSTKSZ);
50 }
51
cleanup(void)52 static void cleanup(void)
53 {
54 free(sigstk.ss_sp);
55 }
56
57 static struct tst_test test = {
58 .setup = setup,
59 .cleanup = cleanup,
60 .test = check_sigaltstack,
61 .tcnt = ARRAY_SIZE(tcases),
62 .needs_tmpdir = 1
63 };
64