1 | /* Check multiple setcontext calls. |
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 | |
24 | static ucontext_t ctx[2]; |
25 | static volatile int done; |
26 | |
27 | static void f2 (void); |
28 | |
29 | static void |
30 | __attribute__ ((noinline, noclone)) |
31 | f1 (void) |
32 | { |
33 | printf (format: "start f1\n" ); |
34 | f2 (); |
35 | } |
36 | |
37 | static void |
38 | __attribute__ ((noinline, noclone)) |
39 | f2 (void) |
40 | { |
41 | printf (format: "start f2\n" ); |
42 | if (setcontext (&ctx[1]) != 0) |
43 | { |
44 | printf (format: "%s: setcontext: %m\n" , __FUNCTION__); |
45 | exit (EXIT_FAILURE); |
46 | } |
47 | } |
48 | |
49 | static void |
50 | f3 (void) |
51 | { |
52 | printf (format: "start f3\n" ); |
53 | if (done) |
54 | exit (EXIT_SUCCESS); |
55 | done = 1; |
56 | if (setcontext (&ctx[0]) != 0) |
57 | { |
58 | printf (format: "%s: setcontext: %m\n" , __FUNCTION__); |
59 | exit (EXIT_FAILURE); |
60 | } |
61 | } |
62 | |
63 | static int |
64 | do_test (void) |
65 | { |
66 | char st1[32768]; |
67 | |
68 | puts (s: "making contexts" ); |
69 | if (getcontext (ucp: &ctx[0]) != 0) |
70 | { |
71 | printf (format: "%s: getcontext: %m\n" , __FUNCTION__); |
72 | exit (EXIT_FAILURE); |
73 | } |
74 | if (getcontext (ucp: &ctx[1]) != 0) |
75 | { |
76 | printf (format: "%s: getcontext: %m\n" , __FUNCTION__); |
77 | exit (EXIT_FAILURE); |
78 | } |
79 | ctx[1].uc_stack.ss_sp = st1; |
80 | ctx[1].uc_stack.ss_size = sizeof st1; |
81 | ctx[1].uc_link = &ctx[0]; |
82 | makecontext (ucp: &ctx[1], func: (void (*) (void)) f3, argc: 0); |
83 | f1 (); |
84 | puts (s: "FAIL: returned from f1 ()" ); |
85 | exit (EXIT_FAILURE); |
86 | } |
87 | |
88 | #include <support/test-driver.c> |
89 | |