18dffb485Schristos /* scoped_mmap, automatically unmap files 28dffb485Schristos 3*5ba1f45fSchristos Copyright (C) 2018-2024 Free Software Foundation, Inc. 48dffb485Schristos 58dffb485Schristos This file is part of GDB. 68dffb485Schristos 78dffb485Schristos This program is free software; you can redistribute it and/or modify 88dffb485Schristos it under the terms of the GNU General Public License as published by 98dffb485Schristos the Free Software Foundation; either version 3 of the License, or 108dffb485Schristos (at your option) any later version. 118dffb485Schristos 128dffb485Schristos This program is distributed in the hope that it will be useful, 138dffb485Schristos but WITHOUT ANY WARRANTY; without even the implied warranty of 148dffb485Schristos MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 158dffb485Schristos GNU General Public License for more details. 168dffb485Schristos 178dffb485Schristos You should have received a copy of the GNU General Public License 188dffb485Schristos along with this program. If not, see <http://www.gnu.org/licenses/>. */ 198dffb485Schristos 208dffb485Schristos #include "scoped_mmap.h" 218dffb485Schristos #include "scoped_fd.h" 228dffb485Schristos #include "gdbsupport/filestuff.h" 238dffb485Schristos 248dffb485Schristos #ifdef HAVE_SYS_MMAN_H 258dffb485Schristos 268dffb485Schristos scoped_mmap 278dffb485Schristos mmap_file (const char *filename) 288dffb485Schristos { 294b169a6bSchristos scoped_fd fd = gdb_open_cloexec (filename, O_RDONLY, 0); 308dffb485Schristos if (fd.get () < 0) 318dffb485Schristos perror_with_name (("open")); 328dffb485Schristos 338dffb485Schristos off_t size = lseek (fd.get (), 0, SEEK_END); 348dffb485Schristos if (size < 0) 358dffb485Schristos perror_with_name (("lseek")); 368dffb485Schristos 378dffb485Schristos /* We can't map an empty file. */ 388dffb485Schristos if (size == 0) 398dffb485Schristos error (_("file to mmap is empty")); 408dffb485Schristos 418dffb485Schristos scoped_mmap mmapped_file (nullptr, size, PROT_READ, MAP_PRIVATE, fd.get (), 0); 428dffb485Schristos if (mmapped_file.get () == MAP_FAILED) 438dffb485Schristos perror_with_name (("mmap")); 448dffb485Schristos 458dffb485Schristos return mmapped_file; 468dffb485Schristos } 478dffb485Schristos 488dffb485Schristos #endif /* HAVE_SYS_MMAN_H */ 49