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89f6307c | 1 | /* Multi-threaded test for resolver initialization. |
04277e02 | 2 | Copyright (C) 2017-2019 Free Software Foundation, Inc. |
89f6307c FW |
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 | |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
89f6307c FW |
18 | |
19 | #include <netdb.h> | |
20 | #include <resolv.h> | |
21 | #include <stdlib.h> | |
22 | #include <support/check.h> | |
23 | #include <support/support.h> | |
24 | #include <support/xthread.h> | |
25 | ||
26 | /* Whether name lookups succeed does not really matter. We use this | |
27 | to trigger initialization of the resolver. */ | |
28 | static const char *test_hostname = "www.gnu.org"; | |
29 | ||
30 | /* The different initialization methods. */ | |
31 | enum test_type { init, byname, gai }; | |
32 | enum { type_count = 3 }; | |
33 | ||
34 | /* Thread function. Perform a few resolver options. */ | |
35 | static void * | |
36 | thread_func (void *closure) | |
37 | { | |
38 | enum test_type *ptype = closure; | |
39 | /* Perform a few calls to the requested operation. */ | |
40 | TEST_VERIFY (*ptype >= 0); | |
41 | TEST_VERIFY (*ptype < (int) type_count); | |
42 | for (int i = 0; i < 3; ++i) | |
43 | switch (*ptype) | |
44 | { | |
45 | case init: | |
46 | res_init (); | |
47 | break; | |
48 | case byname: | |
49 | gethostbyname (test_hostname); | |
50 | break; | |
51 | case gai: | |
52 | { | |
53 | struct addrinfo hints = { 0, }; | |
54 | struct addrinfo *ai = NULL; | |
55 | if (getaddrinfo (test_hostname, "80", &hints, &ai) == 0) | |
56 | freeaddrinfo (ai); | |
57 | } | |
58 | break; | |
59 | } | |
60 | free (ptype); | |
61 | return NULL; | |
62 | } | |
63 | ||
64 | static int | |
65 | do_test (void) | |
66 | { | |
67 | /* Start a small number of threads which perform resolver | |
68 | operations. */ | |
69 | enum { thread_count = 30 }; | |
70 | ||
71 | pthread_t threads[thread_count]; | |
72 | for (int i = 0; i < thread_count; ++i) | |
73 | { | |
74 | enum test_type *ptype = xmalloc (sizeof (*ptype)); | |
75 | *ptype = i % type_count; | |
76 | threads[i] = xpthread_create (NULL, thread_func, ptype); | |
77 | } | |
78 | for (int i = 0; i < type_count; ++i) | |
79 | { | |
80 | enum test_type *ptype = xmalloc (sizeof (*ptype)); | |
81 | *ptype = i; | |
82 | thread_func (ptype); | |
83 | } | |
84 | for (int i = 0; i < thread_count; ++i) | |
85 | xpthread_join (threads[i]); | |
86 | return 0; | |
87 | } | |
88 | ||
89 | #include <support/test-driver.c> |