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d4697bc9 | 1 | /* Copyright (C) 2003-2014 Free Software Foundation, Inc. |
79b0a335 UD |
2 | This file is part of the GNU C Library. |
3 | Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. | |
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 | |
59ba27a6 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
79b0a335 UD |
18 | |
19 | #include <errno.h> | |
20 | #include <error.h> | |
21 | #include <limits.h> | |
22 | #include <pthread.h> | |
23 | #include <stdio.h> | |
24 | #include <stdlib.h> | |
25 | #include <ucontext.h> | |
26 | ||
79b0a335 | 27 | #define N 4 |
72e61500 UD |
28 | #if __WORDSIZE == 64 |
29 | #define GUARD_PATTERN 0xdeadbeafdeadbeaf | |
30 | #else | |
31 | #define GUARD_PATTERN 0xdeadbeaf | |
32 | #endif | |
33 | ||
34 | typedef struct { | |
35 | ucontext_t uctx; | |
36 | unsigned long guard[3]; | |
37 | } tst_context_t; | |
79b0a335 | 38 | |
fb9d5c73 | 39 | static char stacks[N][2 * PTHREAD_STACK_MIN]; |
72e61500 | 40 | static tst_context_t ctx[N][2]; |
79b0a335 UD |
41 | static volatile int failures; |
42 | ||
43 | ||
44 | static void | |
45 | fct (long int n) | |
46 | { | |
e6eb894e UD |
47 | char on_stack[1]; |
48 | ||
79b0a335 | 49 | /* Just to use the thread local descriptor. */ |
e6eb894e | 50 | printf ("%ld: in %s now, on_stack = %p\n", n, __FUNCTION__, on_stack); |
79b0a335 | 51 | errno = 0; |
e6eb894e | 52 | |
72e61500 UD |
53 | if (ctx[n][1].uctx.uc_link != &ctx[n][0].uctx) |
54 | { | |
55 | printf ("context[%ld][1] uc_link damaged, = %p\n", n, | |
56 | ctx[n][1].uctx.uc_link); | |
57 | exit (1); | |
58 | } | |
59 | ||
60 | if ((ctx[n][0].guard[0] != GUARD_PATTERN) | |
61 | || (ctx[n][0].guard[1] != GUARD_PATTERN) | |
62 | || (ctx[n][0].guard[2] != GUARD_PATTERN)) | |
63 | { | |
64 | printf ("%ld: %s context[0] overflow detected!\n", n, __FUNCTION__); | |
65 | ++failures; | |
66 | } | |
67 | ||
68 | if ((ctx[n][1].guard[0] != GUARD_PATTERN) | |
69 | || (ctx[n][1].guard[1] != GUARD_PATTERN) | |
70 | || (ctx[n][1].guard[2] != GUARD_PATTERN)) | |
71 | { | |
72 | printf ("%ld: %s context[1] overflow detected!\n", n, __FUNCTION__); | |
73 | ++failures; | |
74 | } | |
75 | ||
e6eb894e UD |
76 | if (n < 0 || n >= N) |
77 | { | |
78 | printf ("%ld out of range\n", n); | |
79 | exit (1); | |
80 | } | |
81 | ||
82 | if (on_stack < stacks[n] || on_stack >= stacks[n] + sizeof (stacks[0])) | |
83 | { | |
84 | printf ("%ld: on_stack not on appropriate stack\n", n); | |
85 | exit (1); | |
86 | } | |
79b0a335 UD |
87 | } |
88 | ||
89 | ||
90 | static void * | |
91 | tf (void *arg) | |
92 | { | |
93 | int n = (int) (long int) arg; | |
94 | ||
72e61500 UD |
95 | ctx[n][0].guard[0] = GUARD_PATTERN; |
96 | ctx[n][0].guard[1] = GUARD_PATTERN; | |
97 | ctx[n][0].guard[2] = GUARD_PATTERN; | |
98 | ||
99 | ctx[n][1].guard[0] = GUARD_PATTERN; | |
100 | ctx[n][1].guard[1] = GUARD_PATTERN; | |
101 | ctx[n][1].guard[2] = GUARD_PATTERN; | |
102 | ||
103 | if (getcontext (&ctx[n][1].uctx) != 0) | |
79b0a335 UD |
104 | { |
105 | printf ("%d: cannot get context: %m\n", n); | |
106 | exit (1); | |
107 | } | |
108 | ||
109 | printf ("%d: %s: before makecontext\n", n, __FUNCTION__); | |
110 | ||
72e61500 | 111 | ctx[n][1].uctx.uc_stack.ss_sp = stacks[n]; |
fb9d5c73 | 112 | ctx[n][1].uctx.uc_stack.ss_size = sizeof (stacks[n]); |
72e61500 UD |
113 | ctx[n][1].uctx.uc_link = &ctx[n][0].uctx; |
114 | makecontext (&ctx[n][1].uctx, (void (*) (void)) fct, 1, (long int) n); | |
79b0a335 UD |
115 | |
116 | printf ("%d: %s: before swapcontext\n", n, __FUNCTION__); | |
117 | ||
72e61500 | 118 | if (swapcontext (&ctx[n][0].uctx, &ctx[n][1].uctx) != 0) |
79b0a335 UD |
119 | { |
120 | ++failures; | |
121 | printf ("%d: %s: swapcontext failed\n", n, __FUNCTION__); | |
122 | } | |
123 | else | |
124 | printf ("%d: back in %s\n", n, __FUNCTION__); | |
125 | ||
126 | return NULL; | |
127 | } | |
128 | ||
129 | ||
130 | static volatile int global; | |
131 | ||
132 | ||
133 | static int | |
134 | do_test (void) | |
135 | { | |
136 | int n; | |
137 | pthread_t th[N]; | |
138 | ucontext_t mctx; | |
139 | ||
140 | puts ("making contexts"); | |
141 | if (getcontext (&mctx) != 0) | |
142 | { | |
143 | if (errno == ENOSYS) | |
144 | { | |
145 | puts ("context handling not supported"); | |
146 | exit (0); | |
147 | } | |
148 | ||
149 | printf ("%s: getcontext: %m\n", __FUNCTION__); | |
150 | exit (1); | |
151 | } | |
152 | ||
153 | /* Play some tricks with this context. */ | |
154 | if (++global == 1) | |
155 | if (setcontext (&mctx) != 0) | |
156 | { | |
157 | puts ("setcontext failed"); | |
158 | exit (1); | |
159 | } | |
160 | if (global != 2) | |
161 | { | |
162 | puts ("global not incremented twice"); | |
163 | exit (1); | |
164 | } | |
165 | puts ("global OK"); | |
166 | ||
4d1a02ef UD |
167 | pthread_attr_t at; |
168 | ||
169 | if (pthread_attr_init (&at) != 0) | |
170 | { | |
171 | puts ("attr_init failed"); | |
172 | return 1; | |
173 | } | |
174 | ||
175 | if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0) | |
176 | { | |
177 | puts ("attr_setstacksize failed"); | |
178 | return 1; | |
179 | } | |
180 | ||
79b0a335 | 181 | for (n = 0; n < N; ++n) |
4d1a02ef | 182 | if (pthread_create (&th[n], &at, tf, (void *) (long int) n) != 0) |
79b0a335 UD |
183 | { |
184 | puts ("create failed"); | |
185 | exit (1); | |
186 | } | |
187 | ||
4d1a02ef UD |
188 | if (pthread_attr_destroy (&at) != 0) |
189 | { | |
190 | puts ("attr_destroy failed"); | |
191 | return 1; | |
192 | } | |
193 | ||
79b0a335 UD |
194 | for (n = 0; n < N; ++n) |
195 | if (pthread_join (th[n], NULL) != 0) | |
196 | { | |
197 | puts ("join failed"); | |
198 | exit (1); | |
199 | } | |
200 | ||
201 | return failures; | |
202 | } | |
203 | ||
204 | #define TEST_FUNCTION do_test () | |
205 | #include "../test-skeleton.c" |