Commit | Line | Data |
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8bc2021f EZ |
1 | /* BeginSourceFile tls.c |
2 | ||
3 | This file creates and deletes threads. It uses thread local storage | |
4 | variables too. */ | |
5 | ||
6 | #include <unistd.h> | |
7 | #include <stdlib.h> | |
8 | #include <stdio.h> | |
9 | #include <assert.h> | |
10 | #include <pthread.h> | |
11 | #include <semaphore.h> | |
12 | #include <errno.h> | |
13 | ||
14 | #define N_THREADS 3 | |
15 | ||
16 | /* Uncomment to turn on debugging output */ | |
17 | /*#define START_DEBUG*/ | |
18 | ||
19 | /* Thread-local storage. */ | |
20 | __thread int a_thread_local; | |
21 | __thread int another_thread_local; | |
22 | ||
e0740f77 JK |
23 | /* psymtabs->symtabs resolving check. */ |
24 | extern __thread int file2_thread_local; | |
25 | ||
8bc2021f EZ |
26 | /* Global variable just for info addr in gdb. */ |
27 | int a_global; | |
28 | ||
29 | /* Print the results of thread-local storage. */ | |
30 | int thread_local_val[ N_THREADS ]; | |
31 | int another_thread_local_val[ N_THREADS ]; | |
32 | ||
33 | /* Semaphores to make sure the threads are alive when we print the TLS | |
34 | variables from gdb. */ | |
35 | sem_t tell_main, tell_thread; | |
36 | ||
37 | ||
38 | void print_error () | |
39 | { | |
40 | switch (errno) | |
41 | { | |
42 | case EAGAIN: | |
43 | fprintf (stderr, "EAGAIN\n"); | |
44 | break; | |
45 | case EINTR: | |
46 | fprintf (stderr, "EINTR\n"); | |
47 | break; | |
48 | case EINVAL: | |
49 | fprintf (stderr, "EINVAL\n"); | |
50 | break; | |
51 | case ENOSYS: | |
52 | fprintf (stderr, "ENOSYS\n"); | |
53 | break; | |
54 | case ENOENT: | |
55 | fprintf (stderr, "ENOENT\n"); | |
56 | break; | |
57 | case EDEADLK: | |
58 | fprintf (stderr, "EDEADLK\n"); | |
59 | break; | |
60 | default: | |
61 | fprintf (stderr, "Unknown error\n"); | |
62 | break; | |
63 | } | |
64 | } | |
65 | ||
66 | /* Routine for each thread to run, does nothing. */ | |
67 | void *spin( vp ) | |
68 | void * vp; | |
69 | { | |
70 | int me = (long) vp; | |
71 | int i; | |
72 | ||
73 | /* Use a_global. */ | |
74 | a_global++; | |
75 | ||
76 | a_thread_local = 0; | |
77 | another_thread_local = me; | |
78 | for( i = 0; i <= me; i++ ) { | |
79 | a_thread_local += i; | |
80 | } | |
81 | ||
82 | another_thread_local_val[me] = another_thread_local; | |
83 | thread_local_val[ me ] = a_thread_local; /* here we know tls value */ | |
84 | ||
85 | if (sem_post (&tell_main) == -1) | |
86 | { | |
87 | fprintf (stderr, "th %d post on sem tell_main failed\n", me); | |
88 | print_error (); | |
89 | return; | |
90 | } | |
91 | #ifdef START_DEBUG | |
92 | fprintf (stderr, "th %d post on tell main\n", me); | |
93 | #endif | |
94 | ||
51514e06 | 95 | while (1) |
8bc2021f | 96 | { |
8bc2021f EZ |
97 | #ifdef START_DEBUG |
98 | fprintf (stderr, "th %d start wait on tell_thread\n", me); | |
99 | #endif | |
51514e06 MC |
100 | if (sem_wait (&tell_thread) == 0) |
101 | break; | |
102 | ||
103 | if (errno == EINTR) | |
104 | { | |
8bc2021f | 105 | #ifdef START_DEBUG |
51514e06 | 106 | fprintf (stderr, "th %d wait tell_thread got EINTR, rewaiting\n", me); |
8bc2021f | 107 | #endif |
51514e06 MC |
108 | continue; |
109 | } | |
110 | else | |
111 | { | |
112 | fprintf (stderr, "th %d wait on sem tell_thread failed\n", me); | |
113 | print_error (); | |
114 | return; | |
8bc2021f EZ |
115 | } |
116 | } | |
8bc2021f EZ |
117 | |
118 | #ifdef START_DEBUG | |
119 | fprintf (stderr, "th %d Wait on tell_thread\n", me); | |
120 | #endif | |
121 | ||
122 | } | |
123 | ||
e0740f77 JK |
124 | void |
125 | function_referencing_file2_thread_local (void) | |
126 | { | |
127 | file2_thread_local = file2_thread_local; | |
128 | } | |
129 | ||
8bc2021f EZ |
130 | void |
131 | do_pass() | |
132 | { | |
133 | int i; | |
134 | pthread_t t[ N_THREADS ]; | |
135 | int err; | |
136 | ||
137 | for( i = 0; i < N_THREADS; i++) | |
138 | { | |
139 | thread_local_val[i] = 0; | |
140 | another_thread_local_val[i] = 0; | |
141 | } | |
142 | ||
143 | if (sem_init (&tell_main, 0, 0) == -1) | |
144 | { | |
145 | fprintf (stderr, "tell_main semaphore init failed\n"); | |
146 | return; | |
147 | } | |
148 | ||
149 | if (sem_init (&tell_thread, 0, 0) == -1) | |
150 | { | |
151 | fprintf (stderr, "tell_thread semaphore init failed\n"); | |
152 | return; | |
153 | } | |
154 | ||
155 | /* Start N_THREADS threads, then join them so that they are terminated. */ | |
156 | for( i = 0; i < N_THREADS; i++ ) | |
157 | { | |
158 | err = pthread_create( &t[i], NULL, spin, (void *) (long) i ); | |
159 | if( err != 0 ) { | |
160 | fprintf(stderr, "Error in thread %d create\n", i ); | |
161 | } | |
162 | } | |
163 | ||
164 | for( i = 0; i < N_THREADS; i++ ) | |
51514e06 MC |
165 | { |
166 | while (1) | |
167 | { | |
8bc2021f | 168 | #ifdef START_DEBUG |
51514e06 | 169 | fprintf (stderr, "main %d start wait on tell_main\n", i); |
8bc2021f | 170 | #endif |
51514e06 MC |
171 | if (sem_wait (&tell_main) == 0) |
172 | break; | |
8bc2021f | 173 | |
51514e06 MC |
174 | if (errno == EINTR) |
175 | { | |
8bc2021f | 176 | #ifdef START_DEBUG |
51514e06 | 177 | fprintf (stderr, "main %d wait tell_main got EINTR, rewaiting\n", i); |
8bc2021f | 178 | #endif |
51514e06 MC |
179 | continue; |
180 | } | |
181 | else | |
182 | { | |
183 | fprintf (stderr, "main %d wait on sem tell_main failed\n", i); | |
184 | print_error (); | |
185 | return; | |
186 | } | |
187 | } | |
188 | } | |
8bc2021f EZ |
189 | |
190 | #ifdef START_DEBUG | |
191 | fprintf (stderr, "main done waiting on tell_main\n"); | |
192 | #endif | |
193 | ||
194 | i = 10; /* Here all threads should be still alive. */ | |
195 | ||
196 | for( i = 0; i < N_THREADS; i++ ) | |
197 | { | |
198 | if (sem_post (&tell_thread) == -1) | |
199 | { | |
200 | fprintf (stderr, "main %d post on sem tell_thread failed\n", i); | |
201 | print_error (); | |
202 | return; | |
203 | } | |
204 | #ifdef START_DEBUG | |
205 | fprintf (stderr, "main %d post on tell_thread\n", i); | |
206 | #endif | |
207 | } | |
208 | ||
209 | for( i = 0; i < N_THREADS; i++ ) | |
210 | { | |
211 | err = pthread_join(t[i], NULL ); | |
212 | if( err != 0 ) | |
213 | { | |
214 | fprintf (stderr, "error in thread %d join\n", i ); | |
215 | } | |
216 | } | |
217 | ||
218 | i = 10; /* Null line for setting bpts on. */ | |
219 | ||
220 | } | |
221 | ||
222 | int | |
223 | main() | |
224 | { | |
225 | do_pass (); | |
226 | ||
227 | return 0; /* Set breakpoint here before exit. */ | |
228 | } | |
229 | ||
230 | /* EndSourceFile */ |