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84696f37 MM |
1 | /* Self tests for scoped_mmap for GDB, the GNU debugger. |
2 | ||
42a4f53d | 3 | Copyright (C) 2018-2019 Free Software Foundation, Inc. |
84696f37 MM |
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 | ||
268a13a5 TT |
22 | #include "gdbsupport/filestuff.h" |
23 | #include "gdbsupport/scoped_mmap.h" | |
84696f37 MM |
24 | #include "config.h" |
25 | ||
4176f14d | 26 | #if defined(HAVE_SYS_MMAN_H) |
84696f37 | 27 | |
268a13a5 TT |
28 | #include "gdbsupport/selftest.h" |
29 | #include "gdbsupport/gdb_unlinker.h" | |
84696f37 MM |
30 | |
31 | #include <unistd.h> | |
32 | ||
33 | namespace selftests { | |
34 | namespace scoped_mmap { | |
35 | ||
36 | /* Test that the file is unmapped. */ | |
37 | static void | |
38 | test_destroy () | |
39 | { | |
40 | void *mem; | |
41 | ||
42 | errno = 0; | |
43 | { | |
44 | ::scoped_mmap smmap (nullptr, sysconf (_SC_PAGESIZE), PROT_WRITE, | |
45 | MAP_ANONYMOUS | MAP_PRIVATE, 0, 0); | |
46 | ||
47 | mem = smmap.get (); | |
48 | SELF_CHECK (mem != nullptr); | |
49 | } | |
50 | ||
51 | SELF_CHECK (msync (mem, sysconf (_SC_PAGESIZE), 0) == -1 && errno == ENOMEM); | |
52 | } | |
53 | ||
54 | /* Test that the memory can be released. */ | |
55 | static void | |
56 | test_release () | |
57 | { | |
58 | void *mem; | |
59 | ||
60 | errno = 0; | |
61 | { | |
62 | ::scoped_mmap smmap (nullptr, sysconf (_SC_PAGESIZE), PROT_WRITE, | |
63 | MAP_ANONYMOUS | MAP_PRIVATE, 0, 0); | |
64 | ||
65 | mem = smmap.release (); | |
66 | SELF_CHECK (mem != nullptr); | |
67 | } | |
68 | ||
69 | SELF_CHECK (msync (mem, sysconf (_SC_PAGESIZE), 0) == 0 || errno != ENOMEM); | |
70 | ||
71 | munmap (mem, sysconf (_SC_PAGESIZE)); | |
72 | } | |
73 | ||
74 | /* Run selftests. */ | |
75 | static void | |
76 | run_tests () | |
77 | { | |
78 | test_destroy (); | |
79 | test_release (); | |
80 | } | |
81 | ||
82 | } /* namespace scoped_mmap */ | |
5c831bb1 SM |
83 | |
84 | namespace mmap_file | |
85 | { | |
86 | ||
87 | /* Test the standard usage of mmap_file. */ | |
88 | static void | |
89 | test_normal () | |
90 | { | |
91 | char filename[] = "scoped_mmapped_file-selftest-XXXXXX"; | |
b3279b60 | 92 | int fd = gdb_mkostemp_cloexec (filename); |
5c831bb1 SM |
93 | SELF_CHECK (fd >= 0); |
94 | ||
83202f7a | 95 | SELF_CHECK (write (fd, "Hello!", 7) == 7); |
5c831bb1 SM |
96 | close (fd); |
97 | ||
98 | gdb::unlinker unlink_test_file (filename); | |
99 | ||
100 | { | |
101 | ::scoped_mmap m = ::mmap_file (filename); | |
102 | ||
103 | SELF_CHECK (m.get () != MAP_FAILED); | |
104 | SELF_CHECK (m.size () == 7); | |
105 | SELF_CHECK (0 == strcmp ((char *) m.get (), "Hello!")); | |
106 | } | |
107 | } | |
108 | ||
109 | /* Calling mmap_file with a non-existent file should throw an exception. */ | |
110 | static void | |
111 | test_invalid_filename () | |
112 | { | |
113 | bool threw = false; | |
114 | ||
115 | try { | |
116 | ::scoped_mmap m = ::mmap_file ("/this/file/should/not/exist"); | |
117 | } catch (gdb_exception &e) { | |
118 | threw = true; | |
119 | } | |
120 | ||
121 | SELF_CHECK (threw); | |
122 | } | |
123 | ||
124 | ||
125 | /* Run selftests. */ | |
126 | static void | |
127 | run_tests () | |
128 | { | |
129 | test_normal (); | |
130 | test_invalid_filename (); | |
131 | } | |
132 | ||
133 | } /* namespace mmap_file */ | |
84696f37 MM |
134 | } /* namespace selftests */ |
135 | ||
4176f14d | 136 | #endif /* !defined(HAVE_SYS_MMAN_H) */ |
84696f37 MM |
137 | |
138 | void | |
139 | _initialize_scoped_mmap_selftests () | |
140 | { | |
4176f14d | 141 | #if defined(HAVE_SYS_MMAN_H) |
84696f37 MM |
142 | selftests::register_test ("scoped_mmap", |
143 | selftests::scoped_mmap::run_tests); | |
5c831bb1 SM |
144 | selftests::register_test ("mmap_file", |
145 | selftests::mmap_file::run_tests); | |
84696f37 MM |
146 | #endif |
147 | } |