Re: [PATCH] dejagnu framework for testing gdbserver

[Fernando Nasser <fnasser at cygnus dot com>]

Nice.  Can it run with the old gdbserver as well?

Thanks.

Fernando


Michael Snyder wrote:
> 
> The old gdb/testsuite/config/gdbserver.exp had not been
> used or updated since 1995, so I've rewritten it from
> scratch.  My new version has been tested on linux x86
> (with the same machine for host and target).  Extensions
> and enhancements welcome.
> 
> Since it's essentially a new file, I'll just include it
> here instead of a context diff.
> 
> 2000-10-19  Michael Snyder  <msnyder@cleaver.cygnus.com>
> 
>         * config/gdbserver.exp:  Rewritten from the ground up, to make
> it
>         compatible with the current dejagnu tree, and to make it work
> with
>         the new "gdbserver" in libremote.
> 
>   ----------------------------------------------------------------------------------------------------
> # Test framework for GDB (remote protocol) using a "gdbserver",
> # ie. a debug agent running as a native process on the same or
> # a different host.
> 
> #   Copyright (C) 2000, Free Software Foundation, Inc.
> 
> # 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 2 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, write to the Free Software
> # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
> 
> # Please email any bugs, comments, and/or additions to this file to:
> # bug-gdb@prep.ai.mit.edu
> 
> # This file was written by Michael Snyder. (msnyder@redhat.com)
> 
> #
> # This module to be used for testing gdb with a "gdbserver"
> # built either from libremote or from gdb/gdbserver.
> #
> 
> # Load the basic testing library, and the remote stuff.
> load_lib ../config/monitor.exp
> 
> #
> # To be addressed or set in your baseboard config file:
> #
> #   set_board_info gdb_protocol "remote"
> #       Unles you have a gdbserver that uses a different protocol...
> #
> #   set_board_info use_gdb_stub 1
> #       This tells the rest of the test suite not to do things
> #       like "run" which don't work well on remote targets.
> #
> #   set_board_info gdb,do_reload_on_run 1
> #       Unles you have a gdbserver that can handle multiple sessions.
> #
> #   set_board_info noargs 1
> #       At present there is no provision in the remote protocol
> #       for passing arguments.  This test framework does not
> #       address the issue, so it's best to set this variable
> #       in your baseboard configuration file.
> #       FIXME: there's no reason why the test harness couldn't
> #       pass commandline args when it spawns gdbserver.
> #
> #   set_board_info gdb,noinferiorio 1
> #       Neither the traditional gdbserver nor the one in libremote
> #       can presently capture stdout and relay it to GDB via the
> #       'O' packet.  This means that tests involving printf will
> #       fail unles you set this varibale in your baseboard
> #       configuration file.
> #
> #   set_board_info gdb,no_hardware_watchpoints 1
> #       Unles you have a gdbserver that supports hardware watchpoints.
> #       FIXME: gdb should detect if the target doesn't support them,
> #       and fall back to using software watchpoints.
> #
> #   set_board_info gdb_server_prog
> #       This will be the path to the gdbserver program you want to test.
> #       Defaults to "gdbserver".
> #
> #   set_board_info sockethost
> #       The name of the host computer whose socket is being used.
> #       Defaults to "localhost".  Note: old gdbserver requires
> #       that you define this, but libremote/gdbserver does not.
> #
> #   set_board_info socketport
> #       Port id to use for socket connection.  If not set explicitly,
> #       it will start at "2345" and increment for each use.
> #
> 
> #
> # gdb_load -- load a file into the debugger.
> #             return a -1 if anything goes wrong.
> #
> 
> global server_exec;
> global portnum;
> set portnum "2345";
> 
> proc gdb_load { args } {
>     global server_exec;
>     global portnum;
> 
>     # Port id -- either specified in baseboard file, or managed here.
>     if [target_info exists gdb,socketport] {
>         set portnum [target_info gdb,socketport];
>     } else {
>         # Bump the port number to avoid conflicts with hung ports.
>         incr portnum;
>     }
> 
>     # Extract the local and remote host ids from the target board struct.
> 
>     if [target_info exists sockethost] {
>         set debughost  [target_info sockethost];
>     } else {
>         set debughost "localhost:";
>     }
>     # Extract the protocol
>     if [target_info exists gdb_protocol] {
>         set protocol [target_info gdb_protocol];
>     } else {
>         set protocol "remote";
>     }
> 
>     # Extract the name of the gdbserver, if known (default 'gdbserver').
>     if [target_info exists gdb_server_prog] {
>         set gdbserver [target_info gdb_server_prog];
>     } else {
>         set gdbserver "gdbserver";
>     }
>     # Extract the socket hostname
>     if [target_info exists sockethost] {
>         set sockethost [target_info sockethost];
>     } else {
>         set sockethost ""
>     }
> 
>     # Export the host:port pair.
>     set gdbport $debughost$portnum;
> 
>     if { $args == "" || $args == "{}" } {
>         if [info exists server_exec] {
>             set args $server_exec;
>         } else {
>             send_gdb "info files\n";
>             gdb_expect 30 {
>                 -re "Symbols from \"(\[^\"\]+)\"" {
>                     set args $expect_out(1,string);
>                     exp_continue;
>                 }
>                 -re "Local exec file:\[\r\n\]+\[ \t\]*`(\[^'\]+)'," {
>                     set args $expect_out(1,string);
>                     exp_continue;
>                 }
>                 -re "$gdb_prompt $" { }
>             }
>         }
>     }
> 
>     # remember new exec file
>     set server_exec $args;
> 
>     # Fire off the debug agent
>     remote_spawn host \
>             "$gdbserver $sockethost$portnum $args >& /dev/null < /dev/null &" \
>             writeonly
> 
>     # Give it a little time to establish
>     sleep 2
> 
>     # tell gdb what file we are debugging
>     if [gdb_file_cmd $args] {
>         return -1;
>     }
> 
>     # attach to the "serial port"
>     gdb_target_cmd $protocol $gdbport;
> 
>     return 0;
> }

-- 
Fernando Nasser
Red Hat Canada Ltd.                     E-Mail:  fnasser@cygnus.com
2323 Yonge Street, Suite #300
Toronto, Ontario   M4P 2C9