c04fe68f6b
Within gdb open bfd objects are reused where possible if an attempt is made to reopen a file that is already being debugged. To spot if the on disc file has changed gdb currently examines the mtime of the file and compares it to the mtime of the open bfd in the cache. A problem exists when the on disc file is being rapidly regenerated, as happens, for example, with automated testing. In some cases the file is generated so quickly that the mtime appears not to change, while the on disc file has changed. This patch extends the bfd cache to also hold the file size of the file, the inode of the file, and the device id of the file; gdb can then compare filename, file size, mtime, inode, and device id to determine if an existing bfd object can be reused. gdb/ChangeLog: * gdb_bfd.c (struct gdb_bfd_data): Add size, inode, and device id field. (struct gdb_bfd_cache_search): Likewise. (eq_bfd): Compare the size, inode, and device id fields. (gdb_bfd_open): Initialise the size, inode, and device id fields. (gdb_bfd_ref): Likewise. (gdb_bfd_unref): Likewise.
946 lines
21 KiB
C
946 lines
21 KiB
C
/* Definitions for BFD wrappers used by GDB.
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Copyright (C) 2011-2015 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "gdb_bfd.h"
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#include "ui-out.h"
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#include "gdbcmd.h"
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#include "hashtab.h"
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#include "filestuff.h"
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#include "vec.h"
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#ifdef HAVE_MMAP
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#include <sys/mman.h>
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#ifndef MAP_FAILED
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#define MAP_FAILED ((void *) -1)
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#endif
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#endif
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#include "target.h"
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#include "gdb/fileio.h"
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#include "inferior.h"
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typedef bfd *bfdp;
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DEF_VEC_P (bfdp);
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/* An object of this type is stored in the section's user data when
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mapping a section. */
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struct gdb_bfd_section_data
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{
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/* Size of the data. */
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bfd_size_type size;
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/* If the data was mmapped, this is the length of the map. */
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bfd_size_type map_len;
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/* The data. If NULL, the section data has not been read. */
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void *data;
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/* If the data was mmapped, this is the map address. */
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void *map_addr;
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};
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/* A hash table holding every BFD that gdb knows about. This is not
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to be confused with 'gdb_bfd_cache', which is used for sharing
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BFDs; in contrast, this hash is used just to implement
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"maint info bfd". */
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static htab_t all_bfds;
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/* An object of this type is stored in each BFD's user data. */
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struct gdb_bfd_data
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{
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/* The reference count. */
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int refc;
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/* The mtime of the BFD at the point the cache entry was made. */
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time_t mtime;
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/* The file size (in bytes) at the point the cache entry was made. */
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off_t size;
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/* The inode of the file at the point the cache entry was made. */
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ino_t inode;
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/* The device id of the file at the point the cache entry was made. */
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dev_t device_id;
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/* This is true if we have determined whether this BFD has any
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sections requiring relocation. */
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unsigned int relocation_computed : 1;
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/* This is true if any section needs relocation. */
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unsigned int needs_relocations : 1;
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/* This is true if we have successfully computed the file's CRC. */
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unsigned int crc_computed : 1;
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/* The file's CRC. */
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unsigned long crc;
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/* If the BFD comes from an archive, this points to the archive's
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BFD. Otherwise, this is NULL. */
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bfd *archive_bfd;
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/* Table of all the bfds this bfd has included. */
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VEC (bfdp) *included_bfds;
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/* The registry. */
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REGISTRY_FIELDS;
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};
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#define GDB_BFD_DATA_ACCESSOR(ABFD) \
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((struct gdb_bfd_data *) bfd_usrdata (ABFD))
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DEFINE_REGISTRY (bfd, GDB_BFD_DATA_ACCESSOR)
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/* A hash table storing all the BFDs maintained in the cache. */
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static htab_t gdb_bfd_cache;
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/* The type of an object being looked up in gdb_bfd_cache. We use
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htab's capability of storing one kind of object (BFD in this case)
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and using a different sort of object for searching. */
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struct gdb_bfd_cache_search
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{
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/* The filename. */
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const char *filename;
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/* The mtime. */
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time_t mtime;
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/* The file size (in bytes). */
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off_t size;
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/* The inode of the file. */
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ino_t inode;
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/* The device id of the file. */
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dev_t device_id;
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};
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/* A hash function for BFDs. */
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static hashval_t
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hash_bfd (const void *b)
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{
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const bfd *abfd = b;
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/* It is simplest to just hash the filename. */
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return htab_hash_string (bfd_get_filename (abfd));
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}
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/* An equality function for BFDs. Note that this expects the caller
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to search using struct gdb_bfd_cache_search only, not BFDs. */
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static int
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eq_bfd (const void *a, const void *b)
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{
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const bfd *abfd = a;
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const struct gdb_bfd_cache_search *s = b;
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struct gdb_bfd_data *gdata = bfd_usrdata (abfd);
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return (gdata->mtime == s->mtime
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&& gdata->size == s->size
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&& gdata->inode == s->inode
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&& gdata->device_id == s->device_id
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&& strcmp (bfd_get_filename (abfd), s->filename) == 0);
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}
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/* See gdb_bfd.h. */
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int
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is_target_filename (const char *name)
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{
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return startswith (name, TARGET_SYSROOT_PREFIX);
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}
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/* See gdb_bfd.h. */
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int
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gdb_bfd_has_target_filename (struct bfd *abfd)
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{
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return is_target_filename (bfd_get_filename (abfd));
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}
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/* Return the system error number corresponding to ERRNUM. */
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static int
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fileio_errno_to_host (int errnum)
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{
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switch (errnum)
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{
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case FILEIO_EPERM:
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return EPERM;
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case FILEIO_ENOENT:
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return ENOENT;
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case FILEIO_EINTR:
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return EINTR;
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case FILEIO_EIO:
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return EIO;
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case FILEIO_EBADF:
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return EBADF;
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case FILEIO_EACCES:
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return EACCES;
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case FILEIO_EFAULT:
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return EFAULT;
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case FILEIO_EBUSY:
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return EBUSY;
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case FILEIO_EEXIST:
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return EEXIST;
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case FILEIO_ENODEV:
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return ENODEV;
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case FILEIO_ENOTDIR:
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return ENOTDIR;
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case FILEIO_EISDIR:
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return EISDIR;
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case FILEIO_EINVAL:
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return EINVAL;
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case FILEIO_ENFILE:
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return ENFILE;
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case FILEIO_EMFILE:
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return EMFILE;
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case FILEIO_EFBIG:
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return EFBIG;
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case FILEIO_ENOSPC:
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return ENOSPC;
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case FILEIO_ESPIPE:
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return ESPIPE;
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case FILEIO_EROFS:
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return EROFS;
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case FILEIO_ENOSYS:
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return ENOSYS;
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case FILEIO_ENAMETOOLONG:
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return ENAMETOOLONG;
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}
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return -1;
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}
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/* Wrapper for target_fileio_open suitable for passing as the
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OPEN_FUNC argument to gdb_bfd_openr_iovec. The supplied
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OPEN_CLOSURE is unused. */
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static void *
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gdb_bfd_iovec_fileio_open (struct bfd *abfd, void *inferior)
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{
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const char *filename = bfd_get_filename (abfd);
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int fd, target_errno;
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int *stream;
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gdb_assert (is_target_filename (filename));
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fd = target_fileio_open ((struct inferior *) inferior,
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filename + strlen (TARGET_SYSROOT_PREFIX),
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FILEIO_O_RDONLY, 0,
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&target_errno);
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if (fd == -1)
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{
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errno = fileio_errno_to_host (target_errno);
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bfd_set_error (bfd_error_system_call);
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return NULL;
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}
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stream = XCNEW (int);
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*stream = fd;
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return stream;
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}
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/* Wrapper for target_fileio_pread suitable for passing as the
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PREAD_FUNC argument to gdb_bfd_openr_iovec. */
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static file_ptr
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gdb_bfd_iovec_fileio_pread (struct bfd *abfd, void *stream, void *buf,
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file_ptr nbytes, file_ptr offset)
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{
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int fd = *(int *) stream;
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int target_errno;
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file_ptr pos, bytes;
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pos = 0;
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while (nbytes > pos)
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{
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bytes = target_fileio_pread (fd, (gdb_byte *) buf + pos,
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nbytes - pos, offset + pos,
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&target_errno);
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if (bytes == 0)
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/* Success, but no bytes, means end-of-file. */
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break;
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if (bytes == -1)
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{
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errno = fileio_errno_to_host (target_errno);
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bfd_set_error (bfd_error_system_call);
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return -1;
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}
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pos += bytes;
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}
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return pos;
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}
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/* Wrapper for target_fileio_close suitable for passing as the
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CLOSE_FUNC argument to gdb_bfd_openr_iovec. */
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static int
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gdb_bfd_iovec_fileio_close (struct bfd *abfd, void *stream)
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{
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int fd = *(int *) stream;
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int target_errno;
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xfree (stream);
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/* Ignore errors on close. These may happen with remote
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targets if the connection has already been torn down. */
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target_fileio_close (fd, &target_errno);
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/* Zero means success. */
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return 0;
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}
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/* Wrapper for target_fileio_fstat suitable for passing as the
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STAT_FUNC argument to gdb_bfd_openr_iovec. */
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static int
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gdb_bfd_iovec_fileio_fstat (struct bfd *abfd, void *stream,
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struct stat *sb)
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{
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int fd = *(int *) stream;
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int target_errno;
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int result;
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result = target_fileio_fstat (fd, sb, &target_errno);
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if (result == -1)
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{
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errno = fileio_errno_to_host (target_errno);
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bfd_set_error (bfd_error_system_call);
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}
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return result;
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}
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/* See gdb_bfd.h. */
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struct bfd *
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gdb_bfd_open (const char *name, const char *target, int fd)
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{
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hashval_t hash;
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void **slot;
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bfd *abfd;
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struct gdb_bfd_cache_search search;
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struct stat st;
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if (is_target_filename (name))
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{
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if (!target_filesystem_is_local ())
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{
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gdb_assert (fd == -1);
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return gdb_bfd_openr_iovec (name, target,
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gdb_bfd_iovec_fileio_open,
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current_inferior (),
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gdb_bfd_iovec_fileio_pread,
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gdb_bfd_iovec_fileio_close,
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gdb_bfd_iovec_fileio_fstat);
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}
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name += strlen (TARGET_SYSROOT_PREFIX);
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}
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if (gdb_bfd_cache == NULL)
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gdb_bfd_cache = htab_create_alloc (1, hash_bfd, eq_bfd, NULL,
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xcalloc, xfree);
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if (fd == -1)
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{
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fd = gdb_open_cloexec (name, O_RDONLY | O_BINARY, 0);
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if (fd == -1)
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{
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bfd_set_error (bfd_error_system_call);
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return NULL;
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}
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}
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search.filename = name;
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if (fstat (fd, &st) < 0)
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{
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/* Weird situation here. */
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search.mtime = 0;
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search.size = 0;
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search.inode = 0;
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search.device_id = 0;
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}
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else
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{
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search.mtime = st.st_mtime;
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search.size = st.st_size;
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search.inode = st.st_ino;
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search.device_id = st.st_dev;
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}
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/* Note that this must compute the same result as hash_bfd. */
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hash = htab_hash_string (name);
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/* Note that we cannot use htab_find_slot_with_hash here, because
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opening the BFD may fail; and this would violate hashtab
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invariants. */
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abfd = htab_find_with_hash (gdb_bfd_cache, &search, hash);
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if (abfd != NULL)
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{
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close (fd);
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gdb_bfd_ref (abfd);
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return abfd;
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}
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abfd = bfd_fopen (name, target, FOPEN_RB, fd);
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if (abfd == NULL)
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return NULL;
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slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash, INSERT);
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gdb_assert (!*slot);
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*slot = abfd;
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gdb_bfd_ref (abfd);
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return abfd;
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}
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/* A helper function that releases any section data attached to the
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BFD. */
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static void
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free_one_bfd_section (bfd *abfd, asection *sectp, void *ignore)
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{
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struct gdb_bfd_section_data *sect = bfd_get_section_userdata (abfd, sectp);
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if (sect != NULL && sect->data != NULL)
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{
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#ifdef HAVE_MMAP
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if (sect->map_addr != NULL)
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{
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int res;
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res = munmap (sect->map_addr, sect->map_len);
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gdb_assert (res == 0);
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}
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else
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#endif
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xfree (sect->data);
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}
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}
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/* Close ABFD, and warn if that fails. */
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static int
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gdb_bfd_close_or_warn (struct bfd *abfd)
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{
|
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int ret;
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char *name = bfd_get_filename (abfd);
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bfd_map_over_sections (abfd, free_one_bfd_section, NULL);
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ret = bfd_close (abfd);
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if (!ret)
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warning (_("cannot close \"%s\": %s"),
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name, bfd_errmsg (bfd_get_error ()));
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return ret;
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}
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|
||
/* See gdb_bfd.h. */
|
||
|
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void
|
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gdb_bfd_ref (struct bfd *abfd)
|
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{
|
||
struct stat buf;
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struct gdb_bfd_data *gdata;
|
||
void **slot;
|
||
|
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if (abfd == NULL)
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return;
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|
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gdata = bfd_usrdata (abfd);
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||
|
||
if (gdata != NULL)
|
||
{
|
||
gdata->refc += 1;
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||
return;
|
||
}
|
||
|
||
/* Ask BFD to decompress sections in bfd_get_full_section_contents. */
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||
abfd->flags |= BFD_DECOMPRESS;
|
||
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||
gdata = bfd_zalloc (abfd, sizeof (struct gdb_bfd_data));
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gdata->refc = 1;
|
||
gdata->mtime = bfd_get_mtime (abfd);
|
||
gdata->size = bfd_get_size (abfd);
|
||
gdata->archive_bfd = NULL;
|
||
if (bfd_stat (abfd, &buf) == 0)
|
||
{
|
||
gdata->inode = buf.st_ino;
|
||
gdata->device_id = buf.st_dev;
|
||
}
|
||
else
|
||
{
|
||
/* The stat failed. */
|
||
gdata->inode = 0;
|
||
gdata->device_id = 0;
|
||
}
|
||
bfd_usrdata (abfd) = gdata;
|
||
|
||
bfd_alloc_data (abfd);
|
||
|
||
/* This is the first we've seen it, so add it to the hash table. */
|
||
slot = htab_find_slot (all_bfds, abfd, INSERT);
|
||
gdb_assert (slot && !*slot);
|
||
*slot = abfd;
|
||
}
|
||
|
||
/* See gdb_bfd.h. */
|
||
|
||
void
|
||
gdb_bfd_unref (struct bfd *abfd)
|
||
{
|
||
int ix;
|
||
struct gdb_bfd_data *gdata;
|
||
struct gdb_bfd_cache_search search;
|
||
bfd *archive_bfd, *included_bfd;
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||
|
||
if (abfd == NULL)
|
||
return;
|
||
|
||
gdata = bfd_usrdata (abfd);
|
||
gdb_assert (gdata->refc >= 1);
|
||
|
||
gdata->refc -= 1;
|
||
if (gdata->refc > 0)
|
||
return;
|
||
|
||
archive_bfd = gdata->archive_bfd;
|
||
search.filename = bfd_get_filename (abfd);
|
||
|
||
if (gdb_bfd_cache && search.filename)
|
||
{
|
||
hashval_t hash = htab_hash_string (search.filename);
|
||
void **slot;
|
||
|
||
search.mtime = gdata->mtime;
|
||
search.size = gdata->size;
|
||
search.inode = gdata->inode;
|
||
search.device_id = gdata->device_id;
|
||
slot = htab_find_slot_with_hash (gdb_bfd_cache, &search, hash,
|
||
NO_INSERT);
|
||
|
||
if (slot && *slot)
|
||
htab_clear_slot (gdb_bfd_cache, slot);
|
||
}
|
||
|
||
for (ix = 0;
|
||
VEC_iterate (bfdp, gdata->included_bfds, ix, included_bfd);
|
||
++ix)
|
||
gdb_bfd_unref (included_bfd);
|
||
VEC_free (bfdp, gdata->included_bfds);
|
||
|
||
bfd_free_data (abfd);
|
||
bfd_usrdata (abfd) = NULL; /* Paranoia. */
|
||
|
||
htab_remove_elt (all_bfds, abfd);
|
||
|
||
gdb_bfd_close_or_warn (abfd);
|
||
|
||
gdb_bfd_unref (archive_bfd);
|
||
}
|
||
|
||
/* A helper function that returns the section data descriptor
|
||
associated with SECTION. If no such descriptor exists, a new one
|
||
is allocated and cleared. */
|
||
|
||
static struct gdb_bfd_section_data *
|
||
get_section_descriptor (asection *section)
|
||
{
|
||
struct gdb_bfd_section_data *result;
|
||
|
||
result = bfd_get_section_userdata (section->owner, section);
|
||
|
||
if (result == NULL)
|
||
{
|
||
result = bfd_zalloc (section->owner, sizeof (*result));
|
||
bfd_set_section_userdata (section->owner, section, result);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
/* See gdb_bfd.h. */
|
||
|
||
const gdb_byte *
|
||
gdb_bfd_map_section (asection *sectp, bfd_size_type *size)
|
||
{
|
||
bfd *abfd;
|
||
struct gdb_bfd_section_data *descriptor;
|
||
bfd_byte *data;
|
||
|
||
gdb_assert ((sectp->flags & SEC_RELOC) == 0);
|
||
gdb_assert (size != NULL);
|
||
|
||
abfd = sectp->owner;
|
||
|
||
descriptor = get_section_descriptor (sectp);
|
||
|
||
/* If the data was already read for this BFD, just reuse it. */
|
||
if (descriptor->data != NULL)
|
||
goto done;
|
||
|
||
#ifdef HAVE_MMAP
|
||
if (!bfd_is_section_compressed (abfd, sectp))
|
||
{
|
||
/* The page size, used when mmapping. */
|
||
static int pagesize;
|
||
|
||
if (pagesize == 0)
|
||
pagesize = getpagesize ();
|
||
|
||
/* Only try to mmap sections which are large enough: we don't want
|
||
to waste space due to fragmentation. */
|
||
|
||
if (bfd_get_section_size (sectp) > 4 * pagesize)
|
||
{
|
||
descriptor->size = bfd_get_section_size (sectp);
|
||
descriptor->data = bfd_mmap (abfd, 0, descriptor->size, PROT_READ,
|
||
MAP_PRIVATE, sectp->filepos,
|
||
&descriptor->map_addr,
|
||
&descriptor->map_len);
|
||
|
||
if ((caddr_t)descriptor->data != MAP_FAILED)
|
||
{
|
||
#if HAVE_POSIX_MADVISE
|
||
posix_madvise (descriptor->map_addr, descriptor->map_len,
|
||
POSIX_MADV_WILLNEED);
|
||
#endif
|
||
goto done;
|
||
}
|
||
|
||
/* On failure, clear out the section data and try again. */
|
||
memset (descriptor, 0, sizeof (*descriptor));
|
||
}
|
||
}
|
||
#endif /* HAVE_MMAP */
|
||
|
||
/* Handle compressed sections, or ordinary uncompressed sections in
|
||
the no-mmap case. */
|
||
|
||
descriptor->size = bfd_get_section_size (sectp);
|
||
descriptor->data = NULL;
|
||
|
||
data = NULL;
|
||
if (!bfd_get_full_section_contents (abfd, sectp, &data))
|
||
error (_("Can't read data for section '%s' in file '%s'"),
|
||
bfd_get_section_name (abfd, sectp),
|
||
bfd_get_filename (abfd));
|
||
descriptor->data = data;
|
||
|
||
done:
|
||
gdb_assert (descriptor->data != NULL);
|
||
*size = descriptor->size;
|
||
return descriptor->data;
|
||
}
|
||
|
||
/* Return 32-bit CRC for ABFD. If successful store it to *FILE_CRC_RETURN and
|
||
return 1. Otherwise print a warning and return 0. ABFD seek position is
|
||
not preserved. */
|
||
|
||
static int
|
||
get_file_crc (bfd *abfd, unsigned long *file_crc_return)
|
||
{
|
||
unsigned long file_crc = 0;
|
||
|
||
if (bfd_seek (abfd, 0, SEEK_SET) != 0)
|
||
{
|
||
warning (_("Problem reading \"%s\" for CRC: %s"),
|
||
bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
|
||
return 0;
|
||
}
|
||
|
||
for (;;)
|
||
{
|
||
gdb_byte buffer[8 * 1024];
|
||
bfd_size_type count;
|
||
|
||
count = bfd_bread (buffer, sizeof (buffer), abfd);
|
||
if (count == (bfd_size_type) -1)
|
||
{
|
||
warning (_("Problem reading \"%s\" for CRC: %s"),
|
||
bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
|
||
return 0;
|
||
}
|
||
if (count == 0)
|
||
break;
|
||
file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count);
|
||
}
|
||
|
||
*file_crc_return = file_crc;
|
||
return 1;
|
||
}
|
||
|
||
/* See gdb_bfd.h. */
|
||
|
||
int
|
||
gdb_bfd_crc (struct bfd *abfd, unsigned long *crc_out)
|
||
{
|
||
struct gdb_bfd_data *gdata = bfd_usrdata (abfd);
|
||
|
||
if (!gdata->crc_computed)
|
||
gdata->crc_computed = get_file_crc (abfd, &gdata->crc);
|
||
|
||
if (gdata->crc_computed)
|
||
*crc_out = gdata->crc;
|
||
return gdata->crc_computed;
|
||
}
|
||
|
||
|
||
|
||
/* See gdb_bfd.h. */
|
||
|
||
bfd *
|
||
gdb_bfd_fopen (const char *filename, const char *target, const char *mode,
|
||
int fd)
|
||
{
|
||
bfd *result = bfd_fopen (filename, target, mode, fd);
|
||
|
||
if (result)
|
||
gdb_bfd_ref (result);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* See gdb_bfd.h. */
|
||
|
||
bfd *
|
||
gdb_bfd_openr (const char *filename, const char *target)
|
||
{
|
||
bfd *result = bfd_openr (filename, target);
|
||
|
||
if (result)
|
||
gdb_bfd_ref (result);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* See gdb_bfd.h. */
|
||
|
||
bfd *
|
||
gdb_bfd_openw (const char *filename, const char *target)
|
||
{
|
||
bfd *result = bfd_openw (filename, target);
|
||
|
||
if (result)
|
||
gdb_bfd_ref (result);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* See gdb_bfd.h. */
|
||
|
||
bfd *
|
||
gdb_bfd_openr_iovec (const char *filename, const char *target,
|
||
void *(*open_func) (struct bfd *nbfd,
|
||
void *open_closure),
|
||
void *open_closure,
|
||
file_ptr (*pread_func) (struct bfd *nbfd,
|
||
void *stream,
|
||
void *buf,
|
||
file_ptr nbytes,
|
||
file_ptr offset),
|
||
int (*close_func) (struct bfd *nbfd,
|
||
void *stream),
|
||
int (*stat_func) (struct bfd *abfd,
|
||
void *stream,
|
||
struct stat *sb))
|
||
{
|
||
bfd *result = bfd_openr_iovec (filename, target,
|
||
open_func, open_closure,
|
||
pread_func, close_func, stat_func);
|
||
|
||
if (result)
|
||
gdb_bfd_ref (result);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* See gdb_bfd.h. */
|
||
|
||
void
|
||
gdb_bfd_mark_parent (bfd *child, bfd *parent)
|
||
{
|
||
struct gdb_bfd_data *gdata;
|
||
|
||
gdb_bfd_ref (child);
|
||
/* No need to stash the filename here, because we also keep a
|
||
reference on the parent archive. */
|
||
|
||
gdata = bfd_usrdata (child);
|
||
if (gdata->archive_bfd == NULL)
|
||
{
|
||
gdata->archive_bfd = parent;
|
||
gdb_bfd_ref (parent);
|
||
}
|
||
else
|
||
gdb_assert (gdata->archive_bfd == parent);
|
||
}
|
||
|
||
/* See gdb_bfd.h. */
|
||
|
||
bfd *
|
||
gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous)
|
||
{
|
||
bfd *result = bfd_openr_next_archived_file (archive, previous);
|
||
|
||
if (result)
|
||
gdb_bfd_mark_parent (result, archive);
|
||
|
||
return result;
|
||
}
|
||
|
||
/* See gdb_bfd.h. */
|
||
|
||
void
|
||
gdb_bfd_record_inclusion (bfd *includer, bfd *includee)
|
||
{
|
||
struct gdb_bfd_data *gdata;
|
||
|
||
gdb_bfd_ref (includee);
|
||
gdata = bfd_usrdata (includer);
|
||
VEC_safe_push (bfdp, gdata->included_bfds, includee);
|
||
}
|
||
|
||
/* See gdb_bfd.h. */
|
||
|
||
bfd *
|
||
gdb_bfd_fdopenr (const char *filename, const char *target, int fd)
|
||
{
|
||
bfd *result = bfd_fdopenr (filename, target, fd);
|
||
|
||
if (result)
|
||
gdb_bfd_ref (result);
|
||
|
||
return result;
|
||
}
|
||
|
||
|
||
|
||
gdb_static_assert (ARRAY_SIZE (_bfd_std_section) == 4);
|
||
|
||
/* See gdb_bfd.h. */
|
||
|
||
int
|
||
gdb_bfd_section_index (bfd *abfd, asection *section)
|
||
{
|
||
if (section == NULL)
|
||
return -1;
|
||
else if (section == bfd_com_section_ptr)
|
||
return bfd_count_sections (abfd);
|
||
else if (section == bfd_und_section_ptr)
|
||
return bfd_count_sections (abfd) + 1;
|
||
else if (section == bfd_abs_section_ptr)
|
||
return bfd_count_sections (abfd) + 2;
|
||
else if (section == bfd_ind_section_ptr)
|
||
return bfd_count_sections (abfd) + 3;
|
||
return section->index;
|
||
}
|
||
|
||
/* See gdb_bfd.h. */
|
||
|
||
int
|
||
gdb_bfd_count_sections (bfd *abfd)
|
||
{
|
||
return bfd_count_sections (abfd) + 4;
|
||
}
|
||
|
||
/* See gdb_bfd.h. */
|
||
|
||
int
|
||
gdb_bfd_requires_relocations (bfd *abfd)
|
||
{
|
||
struct gdb_bfd_data *gdata = bfd_usrdata (abfd);
|
||
|
||
if (gdata->relocation_computed == 0)
|
||
{
|
||
asection *sect;
|
||
|
||
for (sect = abfd->sections; sect != NULL; sect = sect->next)
|
||
if ((sect->flags & SEC_RELOC) != 0)
|
||
{
|
||
gdata->needs_relocations = 1;
|
||
break;
|
||
}
|
||
|
||
gdata->relocation_computed = 1;
|
||
}
|
||
|
||
return gdata->needs_relocations;
|
||
}
|
||
|
||
|
||
|
||
/* A callback for htab_traverse that prints a single BFD. */
|
||
|
||
static int
|
||
print_one_bfd (void **slot, void *data)
|
||
{
|
||
bfd *abfd = *slot;
|
||
struct gdb_bfd_data *gdata = bfd_usrdata (abfd);
|
||
struct ui_out *uiout = data;
|
||
struct cleanup *inner;
|
||
|
||
inner = make_cleanup_ui_out_tuple_begin_end (uiout, NULL);
|
||
ui_out_field_int (uiout, "refcount", gdata->refc);
|
||
ui_out_field_string (uiout, "addr", host_address_to_string (abfd));
|
||
ui_out_field_string (uiout, "filename", bfd_get_filename (abfd));
|
||
ui_out_text (uiout, "\n");
|
||
do_cleanups (inner);
|
||
|
||
return 1;
|
||
}
|
||
|
||
/* Implement the 'maint info bfd' command. */
|
||
|
||
static void
|
||
maintenance_info_bfds (char *arg, int from_tty)
|
||
{
|
||
struct cleanup *cleanup;
|
||
struct ui_out *uiout = current_uiout;
|
||
|
||
cleanup = make_cleanup_ui_out_table_begin_end (uiout, 3, -1, "bfds");
|
||
ui_out_table_header (uiout, 10, ui_left, "refcount", "Refcount");
|
||
ui_out_table_header (uiout, 18, ui_left, "addr", "Address");
|
||
ui_out_table_header (uiout, 40, ui_left, "filename", "Filename");
|
||
|
||
ui_out_table_body (uiout);
|
||
htab_traverse (all_bfds, print_one_bfd, uiout);
|
||
|
||
do_cleanups (cleanup);
|
||
}
|
||
|
||
/* -Wmissing-prototypes */
|
||
extern initialize_file_ftype _initialize_gdb_bfd;
|
||
|
||
void
|
||
_initialize_gdb_bfd (void)
|
||
{
|
||
all_bfds = htab_create_alloc (10, htab_hash_pointer, htab_eq_pointer,
|
||
NULL, xcalloc, xfree);
|
||
|
||
add_cmd ("bfds", class_maintenance, maintenance_info_bfds, _("\
|
||
List the BFDs that are currently open."),
|
||
&maintenanceinfolist);
|
||
}
|