1 /* scoped_mmap, automatically unmap files
3 Copyright (C) 2018-2021 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
20 #include "common-defs.h"
21 #include "scoped_mmap.h"
22 #include "scoped_fd.h"
23 #include "gdbsupport/filestuff.h"
25 #ifdef HAVE_SYS_MMAN_H
28 mmap_file (const char *filename
)
30 scoped_fd
fd (gdb_open_cloexec (filename
, O_RDONLY
, 0));
32 perror_with_name (("open"));
34 off_t size
= lseek (fd
.get (), 0, SEEK_END
);
36 perror_with_name (("lseek"));
38 /* We can't map an empty file. */
40 error (_("file to mmap is empty"));
42 scoped_mmap
mmapped_file (nullptr, size
, PROT_READ
, MAP_PRIVATE
, fd
.get (), 0);
43 if (mmapped_file
.get () == MAP_FAILED
)
44 perror_with_name (("mmap"));
49 #endif /* HAVE_SYS_MMAN_H */
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