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3736004f01
I tried debugging a remote Windows program on Linux host, and pointed the
sysroot to "/some/path/" rather than "remote:", and I found GDB couldn't
find the dlls in the sysroot. If the dll name is
"C:/Windows/system32/ntdll.dll", I end up with the sysroot+in_pathname
concatenated this way:
(top-gdb) p temp_pathname
$1 = 0x228b690 "/some/pathC:/Windows/system32/ntdll.dll"
^^
That is, a directory separator is missing. This is a regression.
The problem is that solib_find decides that since the target path has
a drive spec, a separator is not necessary, which is clearly wrong in
this case. That check was added in
<https://sourceware.org/ml/gdb-patches/2013-06/msg00028.html>, to
handle the case of sysroot being "remote:". This patch fixes that
original issue in a different way. Instead of checking whether the
path has a drive spec, check whether the sysroot is "remote:". The
patch adds a table that helps visualize the cases that need a
separator. I also confirmed the original issue is still handled as
expected. That is, that "set sysroot remote:" still does the right
thing.
remote_filename_p returns true if the filename is prefixed with
"remote:". In this case, we need to check whether the filename is
exactly "remote:". I thought of different ways or either changing
remote_filename_p or adding another convenience function to remote.c
to avoid exposing the "remote:" prefix out of remote.c. But all
attempts turned out adding lot of over needless complication. So the
patch just exposes the prefix behind a new macro, which allows using a
straighforward strcmp.
gdb/
2013-09-27 Pedro Alves <palves@redhat.com>
* remote.h (REMOTE_SYSROOT_PREFIX): New define.
(remote_filename_p): Add comment.
* remote.c (remote_filename_p): Adjust to use
REMOTE_SYSROOT_PREFIX.
* solib.c (solib_find): When deciding whether we need to add a
directory separator, check whether the sysroot is "remote:"
instead of checking whether the patch has a drive spec. Add
comments.
75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
/* Remote target communications for serial-line targets in custom GDB protocol
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Copyright (C) 1999-2013 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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#ifndef REMOTE_H
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#define REMOTE_H
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#include "remote-notif.h"
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struct target_desc;
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/* Read a packet from the remote machine, with error checking, and
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store it in *BUF. Resize *BUF using xrealloc if necessary to hold
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the result, and update *SIZEOF_BUF. If FOREVER, wait forever
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rather than timing out; this is used (in synchronous mode) to wait
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for a target that is is executing user code to stop. */
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extern void getpkt (char **buf, long *sizeof_buf, int forever);
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/* Send a packet to the remote machine, with error checking. The data
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of the packet is in BUF. The string in BUF can be at most PBUFSIZ
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- 5 to account for the $, # and checksum, and for a possible /0 if
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we are debugging (remote_debug) and want to print the sent packet
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as a string. */
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extern int putpkt (char *buf);
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extern int hex2bin (const char *hex, gdb_byte *bin, int count);
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extern int bin2hex (const gdb_byte *bin, char *hex, int count);
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extern char *unpack_varlen_hex (char *buff, ULONGEST *result);
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void register_remote_g_packet_guess (struct gdbarch *gdbarch, int bytes,
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const struct target_desc *tdesc);
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void register_remote_support_xml (const char *);
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void remote_file_put (const char *local_file, const char *remote_file,
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int from_tty);
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void remote_file_get (const char *remote_file, const char *local_file,
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int from_tty);
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void remote_file_delete (const char *remote_file, int from_tty);
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bfd *remote_bfd_open (const char *remote_file, const char *target);
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/* If a path starts with this sequence, GDB will retrieve the target
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libraries from the remote system. */
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#define REMOTE_SYSROOT_PREFIX "remote:"
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/* True if FILENAME starts with REMOTE_SYSROOT_PREFIX. */
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int remote_filename_p (const char *filename);
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extern int remote_register_number_and_offset (struct gdbarch *gdbarch,
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int regnum, int *pnum,
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int *poffset);
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extern void remote_notif_get_pending_events (struct notif_client *np);
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#endif
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