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84696f37 MM |
1 | /* Self tests for scoped_mmap for GDB, the GNU debugger. |
2 | ||
3 | Copyright (C) 2018 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | ||
22 | #include "common/scoped_mmap.h" | |
23 | #include "config.h" | |
24 | ||
25 | #if defined(HAVE_SYS_MMAN_H) && defined(HAVE_UNISTD_H) | |
26 | ||
27 | #include "selftest.h" | |
5c831bb1 | 28 | #include "common/gdb_unlinker.h" |
84696f37 MM |
29 | |
30 | #include <unistd.h> | |
31 | ||
32 | namespace selftests { | |
33 | namespace scoped_mmap { | |
34 | ||
35 | /* Test that the file is unmapped. */ | |
36 | static void | |
37 | test_destroy () | |
38 | { | |
39 | void *mem; | |
40 | ||
41 | errno = 0; | |
42 | { | |
43 | ::scoped_mmap smmap (nullptr, sysconf (_SC_PAGESIZE), PROT_WRITE, | |
44 | MAP_ANONYMOUS | MAP_PRIVATE, 0, 0); | |
45 | ||
46 | mem = smmap.get (); | |
47 | SELF_CHECK (mem != nullptr); | |
48 | } | |
49 | ||
50 | SELF_CHECK (msync (mem, sysconf (_SC_PAGESIZE), 0) == -1 && errno == ENOMEM); | |
51 | } | |
52 | ||
53 | /* Test that the memory can be released. */ | |
54 | static void | |
55 | test_release () | |
56 | { | |
57 | void *mem; | |
58 | ||
59 | errno = 0; | |
60 | { | |
61 | ::scoped_mmap smmap (nullptr, sysconf (_SC_PAGESIZE), PROT_WRITE, | |
62 | MAP_ANONYMOUS | MAP_PRIVATE, 0, 0); | |
63 | ||
64 | mem = smmap.release (); | |
65 | SELF_CHECK (mem != nullptr); | |
66 | } | |
67 | ||
68 | SELF_CHECK (msync (mem, sysconf (_SC_PAGESIZE), 0) == 0 || errno != ENOMEM); | |
69 | ||
70 | munmap (mem, sysconf (_SC_PAGESIZE)); | |
71 | } | |
72 | ||
73 | /* Run selftests. */ | |
74 | static void | |
75 | run_tests () | |
76 | { | |
77 | test_destroy (); | |
78 | test_release (); | |
79 | } | |
80 | ||
81 | } /* namespace scoped_mmap */ | |
5c831bb1 SM |
82 | |
83 | namespace mmap_file | |
84 | { | |
85 | ||
86 | /* Test the standard usage of mmap_file. */ | |
87 | static void | |
88 | test_normal () | |
89 | { | |
90 | char filename[] = "scoped_mmapped_file-selftest-XXXXXX"; | |
91 | int fd = mkstemp (filename); | |
92 | SELF_CHECK (fd >= 0); | |
93 | ||
94 | write (fd, "Hello!", 7); | |
95 | close (fd); | |
96 | ||
97 | gdb::unlinker unlink_test_file (filename); | |
98 | ||
99 | { | |
100 | ::scoped_mmap m = ::mmap_file (filename); | |
101 | ||
102 | SELF_CHECK (m.get () != MAP_FAILED); | |
103 | SELF_CHECK (m.size () == 7); | |
104 | SELF_CHECK (0 == strcmp ((char *) m.get (), "Hello!")); | |
105 | } | |
106 | } | |
107 | ||
108 | /* Calling mmap_file with a non-existent file should throw an exception. */ | |
109 | static void | |
110 | test_invalid_filename () | |
111 | { | |
112 | bool threw = false; | |
113 | ||
114 | try { | |
115 | ::scoped_mmap m = ::mmap_file ("/this/file/should/not/exist"); | |
116 | } catch (gdb_exception &e) { | |
117 | threw = true; | |
118 | } | |
119 | ||
120 | SELF_CHECK (threw); | |
121 | } | |
122 | ||
123 | ||
124 | /* Run selftests. */ | |
125 | static void | |
126 | run_tests () | |
127 | { | |
128 | test_normal (); | |
129 | test_invalid_filename (); | |
130 | } | |
131 | ||
132 | } /* namespace mmap_file */ | |
84696f37 MM |
133 | } /* namespace selftests */ |
134 | ||
135 | #endif /* !defined(HAVE_SYS_MMAN_H) || !defined(HAVE_UNISTD_H) */ | |
136 | ||
137 | void | |
138 | _initialize_scoped_mmap_selftests () | |
139 | { | |
140 | #if defined(HAVE_SYS_MMAN_H) && defined(HAVE_UNISTD_H) | |
141 | selftests::register_test ("scoped_mmap", | |
142 | selftests::scoped_mmap::run_tests); | |
5c831bb1 SM |
143 | selftests::register_test ("mmap_file", |
144 | selftests::mmap_file::run_tests); | |
84696f37 MM |
145 | #endif |
146 | } |