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375a4844 | 1 | /* Check getcontext and setcontext on the context from makecontext. |
581c785b | 2 | Copyright (C) 2018-2022 Free Software Foundation, Inc. |
375a4844 L |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
375a4844 L |
18 | |
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <ucontext.h> | |
22 | #include <unistd.h> | |
23 | #include <stdatomic.h> | |
24 | ||
25 | static ucontext_t ctx[3]; | |
26 | static atomic_int done; | |
27 | ||
28 | static void | |
29 | __attribute__((noinline, noclone)) | |
30 | f2 (void) | |
31 | { | |
32 | printf ("start f2\n"); | |
33 | done++; | |
34 | if (setcontext (&ctx[2]) != 0) | |
35 | { | |
36 | printf ("%s: setcontext: %m\n", __FUNCTION__); | |
37 | exit (EXIT_FAILURE); | |
38 | } | |
39 | } | |
40 | ||
41 | static void | |
42 | f1 (void) | |
43 | { | |
44 | printf ("start f1\n"); | |
45 | if (getcontext (&ctx[2]) != 0) | |
46 | { | |
47 | printf ("%s: getcontext: %m\n", __FUNCTION__); | |
48 | exit (EXIT_FAILURE); | |
49 | } | |
50 | if (done) | |
51 | exit (EXIT_SUCCESS); | |
52 | f2 (); | |
53 | } | |
54 | ||
55 | static int | |
56 | do_test (void) | |
57 | { | |
58 | char st1[32768]; | |
59 | puts ("making contexts"); | |
60 | if (getcontext (&ctx[0]) != 0) | |
61 | { | |
62 | printf ("%s: getcontext: %m\n", __FUNCTION__); | |
63 | exit (EXIT_FAILURE); | |
64 | } | |
65 | if (getcontext (&ctx[1]) != 0) | |
66 | { | |
67 | printf ("%s: getcontext: %m\n", __FUNCTION__); | |
68 | exit (EXIT_FAILURE); | |
69 | } | |
70 | ctx[1].uc_stack.ss_sp = st1; | |
71 | ctx[1].uc_stack.ss_size = sizeof st1; | |
72 | ctx[1].uc_link = &ctx[0]; | |
73 | makecontext (&ctx[1], (void (*) (void)) f1, 0); | |
74 | if (setcontext (&ctx[1]) != 0) | |
75 | { | |
76 | printf ("%s: setcontext: %m\n", __FUNCTION__); | |
77 | exit (EXIT_FAILURE); | |
78 | } | |
79 | exit (EXIT_FAILURE); | |
80 | } | |
81 | ||
82 | #include <support/test-driver.c> |