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1 | /* This testcase is part of GDB, the GNU debugger. |
2 | ||
32d0add0 | 3 | Copyright 2012-2015 Free Software Foundation, Inc. |
64776a0b PA |
4 | |
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 3 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program 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 | |
13 | GNU General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <pthread.h> | |
20 | #include <stdio.h> | |
21 | #include <stdlib.h> | |
22 | #include <sched.h> | |
23 | #include <errno.h> | |
24 | #include <string.h> | |
25 | #include <assert.h> | |
26 | #include <stdio.h> | |
27 | #include <sys/types.h> | |
28 | #include <dirent.h> | |
29 | #include <assert.h> | |
37bc665e | 30 | #include <unistd.h> |
64776a0b PA |
31 | |
32 | /* Count the number of tasks/threads in the PID thread group. */ | |
33 | ||
34 | static int | |
35 | count_tasks (pid_t pid) | |
36 | { | |
37 | char path[100]; | |
38 | int count; | |
39 | DIR *d; | |
40 | ||
41 | snprintf (path, sizeof (path), "/proc/%d/task/", (int) pid); | |
42 | d = opendir (path); | |
43 | if (d == NULL) | |
44 | return -1; | |
45 | ||
46 | for (count = 0; readdir (d) != NULL; count++) | |
47 | ; | |
48 | closedir (d); | |
49 | ||
50 | /* Account for '.' and '..'. */ | |
51 | assert (count > 2); | |
52 | return count - 2; | |
53 | } | |
54 | ||
55 | pthread_attr_t attr[CPU_SETSIZE]; | |
56 | pthread_t thr[CPU_SETSIZE]; | |
57 | ||
58 | static void * | |
59 | mythread (void *_arg) | |
60 | { | |
61 | return NULL; | |
62 | } | |
63 | ||
64 | int | |
65 | main () | |
66 | { | |
67 | int i; | |
68 | ||
69 | for (i = 0; i < CPU_SETSIZE; i++) | |
70 | { | |
71 | cpu_set_t set; | |
72 | int ret; | |
73 | ||
74 | pthread_attr_init (&attr[i]); | |
75 | CPU_ZERO_S (sizeof (set), &set); | |
76 | CPU_SET_S (i, sizeof (set), &set); | |
77 | ||
78 | ret = pthread_attr_setaffinity_np (&attr[i], sizeof (set), &set); | |
79 | if (ret != 0) | |
80 | { | |
81 | fprintf (stderr, "set_affinity: %d: %s\n", ret, strerror (ret)); | |
82 | exit (3); | |
83 | } | |
84 | ret = pthread_create (&thr[i], &attr[i], mythread, NULL); | |
85 | /* Should fail with EINVAL at some point. */ | |
86 | if (ret != 0) | |
87 | { | |
88 | unsigned long t; | |
89 | ||
90 | fprintf (stderr, "pthread_create: %d: %s\n", ret, strerror (ret)); | |
91 | ||
92 | /* Wait for all threads to exit. pthread_create spawns a | |
93 | clone thread even in the failing case, as it can only try | |
94 | to set the affinity after creating the thread. That new | |
95 | thread is immediately canceled (because setting the | |
96 | affinity fails), by killing it with a SIGCANCEL signal, | |
97 | which may end up in pthread_cancel/unwind paths, which | |
98 | may trigger a libgcc_s.so load, making the thread hit the | |
99 | solib-event breakpoint. Now, if we would let the program | |
100 | exit without waiting, sometimes it would happen that the | |
101 | inferior exits just while we're handling the solib-event, | |
102 | resulting in errors being thrown due to failing ptrace | |
103 | call fails (with ESCHR), breaking the test. */ | |
104 | t = 16; | |
105 | while (count_tasks (getpid ()) > 1) | |
106 | { | |
107 | usleep (t); | |
108 | ||
109 | if (t < 256) | |
110 | t *= 2; | |
111 | } | |
112 | ||
113 | /* Normal exit, because this is what we are expecting. */ | |
114 | exit (0); | |
115 | } | |
116 | } | |
117 | ||
118 | /* Should not normally be reached. */ | |
119 | exit (1); | |
120 | } |