1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
/* Self tests for scoped_mmap for GDB, the GNU debugger.
Copyright (C) 2018 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "common/filestuff.h"
#include "common/scoped_mmap.h"
#include "config.h"
#if defined(HAVE_SYS_MMAN_H)
#include "selftest.h"
#include "common/gdb_unlinker.h"
#include <unistd.h>
namespace selftests {
namespace scoped_mmap {
/* Test that the file is unmapped. */
static void
test_destroy ()
{
void *mem;
errno = 0;
{
::scoped_mmap smmap (nullptr, sysconf (_SC_PAGESIZE), PROT_WRITE,
MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
mem = smmap.get ();
SELF_CHECK (mem != nullptr);
}
SELF_CHECK (msync (mem, sysconf (_SC_PAGESIZE), 0) == -1 && errno == ENOMEM);
}
/* Test that the memory can be released. */
static void
test_release ()
{
void *mem;
errno = 0;
{
::scoped_mmap smmap (nullptr, sysconf (_SC_PAGESIZE), PROT_WRITE,
MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);
mem = smmap.release ();
SELF_CHECK (mem != nullptr);
}
SELF_CHECK (msync (mem, sysconf (_SC_PAGESIZE), 0) == 0 || errno != ENOMEM);
munmap (mem, sysconf (_SC_PAGESIZE));
}
/* Run selftests. */
static void
run_tests ()
{
test_destroy ();
test_release ();
}
} /* namespace scoped_mmap */
namespace mmap_file
{
/* Test the standard usage of mmap_file. */
static void
test_normal ()
{
char filename[] = "scoped_mmapped_file-selftest-XXXXXX";
int fd = gdb_mkostemp_cloexec (filename);
SELF_CHECK (fd >= 0);
SELF_CHECK (write (fd, "Hello!", 7) == 7);
close (fd);
gdb::unlinker unlink_test_file (filename);
{
::scoped_mmap m = ::mmap_file (filename);
SELF_CHECK (m.get () != MAP_FAILED);
SELF_CHECK (m.size () == 7);
SELF_CHECK (0 == strcmp ((char *) m.get (), "Hello!"));
}
}
/* Calling mmap_file with a non-existent file should throw an exception. */
static void
test_invalid_filename ()
{
bool threw = false;
try {
::scoped_mmap m = ::mmap_file ("/this/file/should/not/exist");
} catch (gdb_exception &e) {
threw = true;
}
SELF_CHECK (threw);
}
/* Run selftests. */
static void
run_tests ()
{
test_normal ();
test_invalid_filename ();
}
} /* namespace mmap_file */
} /* namespace selftests */
#endif /* !defined(HAVE_SYS_MMAN_H) */
void
_initialize_scoped_mmap_selftests ()
{
#if defined(HAVE_SYS_MMAN_H)
selftests::register_test ("scoped_mmap",
selftests::scoped_mmap::run_tests);
selftests::register_test ("mmap_file",
selftests::mmap_file::run_tests);
#endif
}
|
