1 | /* Check setcontext on the context from makecontext. |
2 | Copyright (C) 2018-2022 Free Software Foundation, Inc. |
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 |
17 | <https://www.gnu.org/licenses/>. */ |
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[5]; |
26 | static atomic_int done; |
27 | |
28 | static void |
29 | f1 (void) |
30 | { |
31 | puts (s: "start f1" ); |
32 | if (!done) |
33 | { |
34 | if (getcontext (ucp: &ctx[2]) != 0) |
35 | { |
36 | printf (format: "%s: getcontext: %m\n" , __FUNCTION__); |
37 | exit (EXIT_FAILURE); |
38 | } |
39 | if (done) |
40 | { |
41 | puts (s: "set context in f1" ); |
42 | if (setcontext (&ctx[3]) != 0) |
43 | { |
44 | printf (format: "%s: setcontext: %m\n" , __FUNCTION__); |
45 | exit (EXIT_FAILURE); |
46 | } |
47 | } |
48 | } |
49 | done++; |
50 | puts (s: "swap contexts in f1" ); |
51 | if (swapcontext (oucp: &ctx[4], ucp: &ctx[2]) != 0) |
52 | { |
53 | printf (format: "%s: setcontext: %m\n" , __FUNCTION__); |
54 | exit (EXIT_FAILURE); |
55 | } |
56 | puts (s: "end f1" ); |
57 | exit (done == 2 ? EXIT_SUCCESS : EXIT_FAILURE); |
58 | } |
59 | |
60 | static int |
61 | do_test (void) |
62 | { |
63 | char st1[32768]; |
64 | puts (s: "making contexts" ); |
65 | if (getcontext (ucp: &ctx[0]) != 0) |
66 | { |
67 | printf (format: "%s: getcontext: %m\n" , __FUNCTION__); |
68 | exit (EXIT_FAILURE); |
69 | } |
70 | if (getcontext (ucp: &ctx[1]) != 0) |
71 | { |
72 | printf (format: "%s: getcontext: %m\n" , __FUNCTION__); |
73 | exit (EXIT_FAILURE); |
74 | } |
75 | ctx[1].uc_stack.ss_sp = st1; |
76 | ctx[1].uc_stack.ss_size = sizeof st1; |
77 | ctx[1].uc_link = &ctx[0]; |
78 | makecontext (ucp: &ctx[1], func: (void (*) (void)) f1, argc: 0); |
79 | puts (s: "swap contexts" ); |
80 | if (swapcontext (oucp: &ctx[3], ucp: &ctx[1]) != 0) |
81 | { |
82 | printf (format: "%s: setcontext: %m\n" , __FUNCTION__); |
83 | exit (EXIT_FAILURE); |
84 | } |
85 | if (done != 1) |
86 | exit (EXIT_FAILURE); |
87 | done++; |
88 | puts (s: "set context" ); |
89 | if (setcontext (&ctx[4]) != 0) |
90 | { |
91 | printf (format: "%s: setcontext: %m\n" , __FUNCTION__); |
92 | exit (EXIT_FAILURE); |
93 | } |
94 | exit (EXIT_FAILURE); |
95 | } |
96 | |
97 | #include <support/test-driver.c> |
98 | |