1 /*
2 * Copyright (C) 2010 Red Hat, Inc.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
11 *
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program
17 * with other software, or any other product whatsoever.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write the Free Software Foundation,
21 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
22 */
23 /*
24 * munmap() don't check sysctl_max_mapcount
25 *
26 * From http://lkml.org/lkml/2009/10/2/85:
27 *
28 * On ia64, the following test program exit abnormally, because glibc
29 * thread library called abort().
30 *
31 * ========================================================
32 * (gdb) bt
33 * #0 0xa000000000010620 in __kernel_syscall_via_break ()
34 * #1 0x20000000003208e0 in raise () from /lib/libc.so.6.1
35 * #2 0x2000000000324090 in abort () from /lib/libc.so.6.1
36 * #3 0x200000000027c3e0 in __deallocate_stack () from
37 * /lib/libpthread.so.0
38 * #4 0x200000000027f7c0 in start_thread () from /lib/libpthread.so.0
39 * #5 0x200000000047ef60 in __clone2 () from /lib/libc.so.6.1
40 * ========================================================
41 * The fact is, glibc call munmap() when thread exitng time for freeing
42 * stack, and it assume munlock() never fail. However, munmap() often
43 * make vma splitting and it with many mapcount make -ENOMEM.
44 *
45 * Oh well, stack unfreeing is not reasonable option. Also munlock() via
46 * free() shouldn't failed.
47 *
48 * Thus, munmap() shoudn't check max-mapcount.
49 */
50 #include<stdio.h>
51 #include<stdlib.h>
52 #include<string.h>
53 #include<pthread.h>
54 #include<errno.h>
55 #include<unistd.h>
56 #include "test.h"
57
58 char *TCID = "mmap11";
59 int TST_TOTAL = 1;
60
61 #define MAL_SIZE (100*1024)
62
63 static void *wait_thread(void *args);
64 static void *wait_thread2(void *args);
65 static void setup(void);
66 static void cleanup(void);
67 static void check(void);
68
main(int argc,char * argv[])69 int main(int argc, char *argv[])
70 {
71
72 tst_parse_opts(argc, argv, NULL, NULL);
73 setup();
74 check();
75 cleanup();
76 tst_exit();
77 }
78
setup(void)79 void setup(void)
80 {
81 tst_require_root();
82
83 tst_sig(FORK, DEF_HANDLER, cleanup);
84 TEST_PAUSE;
85 }
86
cleanup(void)87 void cleanup(void)
88 {
89 }
90
check(void)91 void check(void)
92 {
93 int lc;
94 pthread_t *thread, th;
95 int ret, count = 0;
96 pthread_attr_t attr;
97
98 ret = pthread_attr_init(&attr);
99 if (ret)
100 tst_brkm(TBROK | TERRNO, cleanup, "pthread_attr_init");
101 ret = pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
102 if (ret)
103 tst_brkm(TBROK | TERRNO, cleanup,
104 "pthread_attr_setdetachstate");
105 thread = malloc(STD_LOOP_COUNT * sizeof(pthread_t));
106 if (thread == NULL)
107 tst_brkm(TBROK | TERRNO, cleanup, "malloc");
108
109 for (lc = 0; TEST_LOOPING(lc); lc++) {
110 tst_count = 0;
111 ret = pthread_create(&th, &attr, wait_thread, NULL);
112 if (ret) {
113 tst_resm(TINFO, "[%d] ", count);
114 tst_brkm(TBROK | TERRNO, cleanup, "pthread_create");
115 }
116 count++;
117 ret = pthread_create(&thread[lc], &attr, wait_thread2, NULL);
118 if (ret) {
119 tst_resm(TINFO, "[%d] ", count);
120 tst_brkm(TBROK | TERRNO, cleanup, "pthread_create");
121 }
122 count++;
123 }
124 tst_resm(TPASS, "test completed.");
125 free(thread);
126 }
127
wait_thread(void * args)128 void *wait_thread(void *args)
129 {
130 void *addr;
131
132 addr = malloc(MAL_SIZE);
133 if (addr)
134 memset(addr, 1, MAL_SIZE);
135 sleep(1);
136 return NULL;
137 }
138
wait_thread2(void * args)139 void *wait_thread2(void *args)
140 {
141 return NULL;
142 }
143