1 | /* Copyright (C) 2003-2024 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <pthread.h> |
19 | #include <signal.h> |
20 | #include <stdint.h> |
21 | #include <stdio.h> |
22 | #include <stdlib.h> |
23 | #include <unistd.h> |
24 | |
25 | |
26 | #ifdef SIGRTMIN |
27 | |
28 | # define N 2 |
29 | static pthread_barrier_t bar; |
30 | static struct |
31 | { |
32 | void *p; |
33 | pthread_t s; |
34 | } ti[N]; |
35 | static int sig1; |
36 | |
37 | |
38 | static void |
39 | handler (int sig) |
40 | { |
41 | pthread_t self = pthread_self (); |
42 | size_t i; |
43 | |
44 | for (i = 0; i < N; ++i) |
45 | if (ti[i].s == self) |
46 | { |
47 | if ((uintptr_t) ti[i].p <= (uintptr_t) &self |
48 | && (uintptr_t) ti[i].p + 2 * MINSIGSTKSZ > (uintptr_t) &self) |
49 | { |
50 | puts (s: "alt stack not used" ); |
51 | exit (1); |
52 | } |
53 | |
54 | printf (format: "thread %zu used alt stack for signal %d\n" , i, sig); |
55 | |
56 | return; |
57 | } |
58 | |
59 | puts (s: "handler: thread not found" ); |
60 | exit (1); |
61 | } |
62 | |
63 | |
64 | static void * |
65 | tf (void *arg) |
66 | { |
67 | size_t nr = (uintptr_t) arg; |
68 | if (nr >= N) |
69 | { |
70 | puts (s: "wrong nr parameter" ); |
71 | exit (1); |
72 | } |
73 | |
74 | sigset_t ss; |
75 | sigemptyset (&ss); |
76 | size_t i; |
77 | for (i = 0; i < N; ++i) |
78 | if (i != nr) |
79 | if (sigaddset (&ss, sig1 + i) != 0) |
80 | { |
81 | puts (s: "tf: sigaddset failed" ); |
82 | exit (1); |
83 | } |
84 | if (pthread_sigmask (SIG_BLOCK, newmask: &ss, NULL) != 0) |
85 | { |
86 | puts (s: "tf: sigmask failed" ); |
87 | exit (1); |
88 | } |
89 | |
90 | void *p = malloc (size: 2 * MINSIGSTKSZ); |
91 | if (p == NULL) |
92 | { |
93 | puts (s: "tf: malloc failed" ); |
94 | exit (1); |
95 | } |
96 | |
97 | stack_t s; |
98 | s.ss_sp = p; |
99 | s.ss_size = 2 * MINSIGSTKSZ; |
100 | s.ss_flags = 0; |
101 | if (sigaltstack (ss: &s, NULL) != 0) |
102 | { |
103 | puts (s: "tf: sigaltstack failed" ); |
104 | exit (1); |
105 | } |
106 | |
107 | ti[nr].p = p; |
108 | ti[nr].s = pthread_self (); |
109 | |
110 | pthread_barrier_wait (barrier: &bar); |
111 | |
112 | pthread_barrier_wait (barrier: &bar); |
113 | |
114 | return NULL; |
115 | } |
116 | |
117 | |
118 | static int |
119 | do_test (void) |
120 | { |
121 | sig1 = SIGRTMIN; |
122 | if (sig1 + N > SIGRTMAX) |
123 | { |
124 | puts (s: "too few RT signals" ); |
125 | return 0; |
126 | } |
127 | |
128 | struct sigaction sa; |
129 | sa.sa_handler = handler; |
130 | sa.sa_flags = 0; |
131 | sigemptyset (&sa.sa_mask); |
132 | |
133 | if (sigaction (sig: sig1, act: &sa, NULL) != 0 |
134 | || sigaction (sig: sig1 + 1, act: &sa, NULL) != 0 |
135 | || sigaction (sig: sig1 + 2, act: &sa, NULL) != 0) |
136 | { |
137 | puts (s: "sigaction failed" ); |
138 | return 1; |
139 | } |
140 | |
141 | if (pthread_barrier_init (barrier: &bar, NULL, count: 1 + N) != 0) |
142 | { |
143 | puts (s: "barrier_init failed" ); |
144 | return 1; |
145 | } |
146 | |
147 | pthread_t th[N]; |
148 | size_t i; |
149 | for (i = 0; i < N; ++i) |
150 | if (pthread_create (newthread: &th[i], NULL, start_routine: tf, arg: (void *) (long int) i) != 0) |
151 | { |
152 | puts (s: "create failed" ); |
153 | return 1; |
154 | } |
155 | |
156 | /* Block the three signals. */ |
157 | sigset_t ss; |
158 | sigemptyset (&ss); |
159 | for (i = 0; i <= N; ++i) |
160 | sigaddset (&ss, sig1 + i); |
161 | if (pthread_sigmask (SIG_BLOCK, newmask: &ss, NULL) != 0) |
162 | { |
163 | puts (s: "main: sigmask failed" ); |
164 | return 1; |
165 | } |
166 | |
167 | pthread_barrier_wait (barrier: &bar); |
168 | |
169 | /* Send some signals. */ |
170 | pid_t me = getpid (); |
171 | kill (pid: me, sig: sig1 + N); |
172 | for (i = 0; i < N; ++i) |
173 | kill (pid: me, sig: sig1 + i); |
174 | kill (pid: me, sig: sig1 + N); |
175 | |
176 | /* Give the signals a chance to be worked on. */ |
177 | sleep (seconds: 1); |
178 | |
179 | pthread_barrier_wait (barrier: &bar); |
180 | |
181 | for (i = 0; i < N; ++i) |
182 | if (pthread_join (th: th[i], NULL) != 0) |
183 | { |
184 | puts (s: "join failed" ); |
185 | return 1; |
186 | } |
187 | |
188 | return 0; |
189 | } |
190 | |
191 | # define TEST_FUNCTION do_test () |
192 | |
193 | #else |
194 | # define TEST_FUNCTION 0 |
195 | #endif |
196 | #include "../test-skeleton.c" |
197 | |