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- /* scoped_mmap, automatically unmap files
- Copyright (C) 2018-2022 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 "common-defs.h"
- #include "scoped_mmap.h"
- #include "scoped_fd.h"
- #include "gdbsupport/filestuff.h"
- #ifdef HAVE_SYS_MMAN_H
- scoped_mmap
- mmap_file (const char *filename)
- {
- scoped_fd fd = gdb_open_cloexec (filename, O_RDONLY, 0);
- if (fd.get () < 0)
- perror_with_name (("open"));
- off_t size = lseek (fd.get (), 0, SEEK_END);
- if (size < 0)
- perror_with_name (("lseek"));
- /* We can't map an empty file. */
- if (size == 0)
- error (_("file to mmap is empty"));
- scoped_mmap mmapped_file (nullptr, size, PROT_READ, MAP_PRIVATE, fd.get (), 0);
- if (mmapped_file.get () == MAP_FAILED)
- perror_with_name (("mmap"));
- return mmapped_file;
- }
- #endif /* HAVE_SYS_MMAN_H */
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