mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-27 04:52:05 +08:00
13084383e8
Make gdb_open_cloexec return a scoped_fd, to encourage using automatic management of the file descriptor closing. Except in the most trivial cases, I changed the callers to just release the fd, which retains their existing behavior. That will allow the transition to using scoped_fd more to go gradually, one caller at a time. Change-Id: Ife022b403f96e71d5ebb4f1056ef6251b30fe554
50 lines
1.4 KiB
C++
50 lines
1.4 KiB
C++
/* scoped_mmap, automatically unmap files
|
|
|
|
Copyright (C) 2018-2021 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 */
|