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1 | /* Check longjmp from user context to main context. |
2 | Copyright (C) 2023 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 <setjmp.h> | |
22 | #include <ucontext.h> | |
23 | #include <unistd.h> | |
24 | ||
25 | static jmp_buf jmpbuf; | |
26 | static ucontext_t ctx; | |
27 | ||
28 | static void f2 (void); | |
29 | ||
30 | static void | |
31 | __attribute__ ((noinline, noclone)) | |
32 | f1 (void) | |
33 | { | |
34 | printf ("start f1\n"); | |
35 | f2 (); | |
36 | } | |
37 | ||
38 | static void | |
39 | __attribute__ ((noinline, noclone)) | |
40 | f2 (void) | |
41 | { | |
42 | printf ("start f2\n"); | |
43 | if (setcontext (&ctx) != 0) | |
44 | { | |
45 | printf ("%s: setcontext: %m\n", __FUNCTION__); | |
46 | exit (EXIT_FAILURE); | |
47 | } | |
48 | } | |
49 | ||
50 | static void | |
51 | f3 (void) | |
52 | { | |
53 | printf ("start f3\n"); | |
54 | longjmp (jmpbuf, 1); | |
55 | } | |
56 | ||
57 | static int | |
58 | __attribute__ ((noinline, noclone)) | |
59 | do_test_1 (void) | |
60 | { | |
61 | char st1[32768]; | |
62 | ||
63 | if (setjmp (jmpbuf) != 0) | |
64 | return 0; | |
65 | ||
66 | puts ("making contexts"); | |
67 | if (getcontext (&ctx) != 0) | |
68 | { | |
69 | printf ("%s: getcontext: %m\n", __FUNCTION__); | |
70 | exit (EXIT_FAILURE); | |
71 | } | |
72 | ctx.uc_stack.ss_sp = st1; | |
73 | ctx.uc_stack.ss_size = sizeof st1; | |
74 | ctx.uc_link = NULL; | |
75 | makecontext (&ctx, (void (*) (void)) f3, 0); | |
76 | f1 (); | |
77 | puts ("FAIL: returned from f1 ()"); | |
78 | exit (EXIT_FAILURE); | |
79 | } | |
80 | ||
81 | static int | |
82 | do_test (void) | |
83 | { | |
84 | return do_test_1 (); | |
85 | } | |
86 | ||
87 | #include <support/test-driver.c> |