1 # Copyright 2000-2021 Free Software Foundation, Inc.
3 # This program is free software; you can redistribute it and/or modify
4 # it under the terms of the GNU General Public License as published by
5 # the Free Software Foundation; either version 3 of the License, or
6 # (at your option) any later version.
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU General Public License for more details.
13 # You should have received a copy of the GNU General Public License
14 # along with this program. If not, see <http://www.gnu.org/licenses/>.
16 # This file is based on config/gdbserver.exp, which was written by
17 # Michael Snyder (msnyder@redhat.com).
20 # To be addressed or set in your baseboard config file:
22 # set_board_info gdb_protocol "remote"
23 # Unles you have a gdbserver that uses a different protocol...
24 # After GDB starts you should check global $gdbserver_protocol instead as
25 # the testfile may force a specific different target protocol itself.
27 # set_board_info gdb_server_prog
28 # This will be the path to the gdbserver program you want to test.
29 # Defaults to "gdbserver".
31 # set_board_info sockethost
32 # The name of the host computer whose socket is being used.
33 # Defaults to "localhost". Note: old gdbserver requires
34 # that you define this, but libremote/gdbserver does not.
36 # set_board_info gdb,socketport
37 # Port id to use for socket connection. If not set explicitly,
38 # it will start at "2345" and increment for each use.
39 # After GDB starts you should check global $gdbserver_gdbport for the
40 # real port used. It is not useful if $gdbserver_reconnect_p was not set.
45 # Send gdb the "target" command. Returns 0 on success, 1 on failure, 2 on
47 # If specified, then ADDITIONAL_TEXT must match the text that comes after
48 # the connection message in order for the procedure to succeed.
50 proc gdb_target_cmd_ext { targetname serialport {additional_text ""} } {
53 set serialport_re [string_to_regexp $serialport]
54 for {set i 1} {$i <= 3} {incr i} {
55 send_gdb "target $targetname $serialport\n"
57 -re "A program is being debugged already.*ill it.*y or n. $" {
61 -re "unknown host.*$gdb_prompt" {
62 verbose "Couldn't look up $serialport"
64 -re "Couldn't establish connection to remote.*$gdb_prompt $" {
65 verbose "Connection failed"
67 -re "Non-stop mode requested, but remote does not support non-stop.*$gdb_prompt $" {
68 verbose "remote does not support non-stop"
71 -re "Remote MIPS debugging.*$additional_text.*$gdb_prompt" {
72 verbose "Set target to $targetname"
75 -re "Remote debugging using .*$serialport_re.*$additional_text.*$gdb_prompt $" {
76 verbose "Set target to $targetname"
79 -re "Remote debugging using stdio.*$additional_text.*$gdb_prompt $" {
80 verbose "Set target to $targetname"
83 -re "Remote target $targetname connected to.*$additional_text.*$gdb_prompt $" {
84 verbose "Set target to $targetname"
87 -re "Connected to.*$additional_text.*$gdb_prompt $" {
88 verbose "Set target to $targetname"
91 -re "Ending remote.*$gdb_prompt $" { }
92 -re "Connection refused.*$gdb_prompt $" {
93 verbose "Connection refused by remote target. Pausing, and trying again."
97 -re "Timeout reading from remote system.*$gdb_prompt $" {
98 verbose "Got timeout error from gdb."
100 -notransfer -re "Remote debugging using .*\r\n> $" {
101 # We got an unexpected prompt while creating the target.
102 # Leave it there for the test to diagnose.
105 -re ": Network is unreachable.\r\n.*$gdb_prompt $" {
117 # Like gdb_target_cmd_ext, but returns 0 on success, 1 on failure.
119 proc gdb_target_cmd { args } {
120 set res [eval gdb_target_cmd_ext $args]
121 return [expr $res == 0 ? 0 : 1]
127 # Locate the gdbserver binary. Returns "" if gdbserver could not be found.
129 proc find_gdbserver { } {
133 if [info exists GDBSERVER] {
137 if [target_info exists gdb_server_prog] {
138 return [target_info gdb_server_prog]
141 set toplevel [file join [file dirname $GDB] .. gdbserver]
142 foreach gdbserver [list "${GDB}server" $toplevel] {
143 if { [file isdirectory $gdbserver] } {
144 append gdbserver "/gdbserver"
147 if { [file executable $gdbserver] } {
155 # Return non-zero if we should skip gdbserver-specific tests.
157 proc skip_gdbserver_tests { } {
158 if { [find_gdbserver] == "" } {
162 # If GDB is lack of XML support, and targets, like arm, have
163 # multiple target descriptions, GDB doesn't know which target
164 # description GDBserver uses, and may fail to parse 'g' packet
166 if { [gdb_skip_xml_test]
167 && ([istarget "arm*-*-linux*"]
168 || [istarget "mips*-*-linux*"]
169 || [istarget "powerpc*-*-linux*"]
170 || [istarget "s390*-*-linux*"]
171 || [istarget "x86_64-*-linux*"]
172 || [istarget "i\[34567\]86-*-linux*"]) } {
179 # Download the currently loaded program to the target if necessary.
180 # Return the target system filename.
181 # NOTE: This was named "gdbserver_download", but that collides with the
182 # dejagnu "download" API function when using load_generic_config "gdbserver".
184 proc gdbserver_download_current_prog { } {
185 global gdbserver_host_exec
186 global gdbserver_host_mtime
187 global gdbserver_server_exec
188 global last_loaded_file
190 if { ![info exists last_loaded_file] } {
194 set host_exec $last_loaded_file
196 # If we already downloaded a file to the target, see if we can reuse it.
198 if { [info exists gdbserver_server_exec] } {
201 # If the file has changed, we can not.
202 if { $host_exec != $gdbserver_host_exec } {
206 # If the mtime has changed, we can not.
207 if { [file mtime $host_exec] != $gdbserver_host_mtime } {
213 set gdbserver_host_exec $host_exec
214 set gdbserver_host_mtime [file mtime $host_exec]
215 set gdbserver_server_exec [gdb_remote_download target $host_exec]
218 return $gdbserver_server_exec
221 # Default routine to compute the argument to "target remote".
223 proc gdbserver_default_get_remote_address { host port } {
224 # Historically HOST included the trailing ":".
225 # To avoid breaking any board files out there we leave things alone.
229 # Default routine to compute the "comm" argument for gdbserver.
231 proc gdbserver_default_get_comm_port { port } {
235 # Start a gdbserver process with initial OPTIONS and trailing ARGUMENTS.
236 # The port will be filled in between them automatically.
238 # Returns the target protocol and socket to connect to.
240 proc gdbserver_start { options arguments } {
242 global GDB_TEST_SOCKETHOST
244 # Port id -- either specified in baseboard file, or managed here.
245 if [target_info exists gdb,socketport] {
246 set portnum [target_info gdb,socketport]
248 # Bump the port number to avoid conflicts with hung ports.
252 # Extract the local and remote host ids from the target board struct.
253 if { [info exists GDB_TEST_SOCKETHOST] } {
254 # The user is not supposed to provide a port number, just a
255 # hostname/address, therefore we add the trailing ":" here.
256 set debughost "${GDB_TEST_SOCKETHOST}:"
257 # Escape open and close square brackets.
258 set debughost_tmp [string map { [ \\[ ] \\] } $debughost]
259 # We need a "gdbserver" version of the debughost, which will
260 # have the possible connection prefix stripped. This is
261 # because gdbserver currently doesn't recognize the prefixes.
262 regsub -all "^\(tcp:|udp:|tcp4:|udp4:|tcp6:|udp6:\)" $debughost_tmp "" debughost_gdbserver
263 } elseif [target_info exists sockethost] {
264 set debughost [target_info sockethost]
265 set debughost_gdbserver $debughost
267 set debughost "localhost:"
268 set debughost_gdbserver $debughost
271 # Some boards use a different value for the port that is passed to
272 # gdbserver and the port that is passed to the "target remote" command.
273 # One example is the stdio gdbserver support.
274 if [target_info exists gdb,get_remote_address] {
275 set get_remote_address [target_info gdb,get_remote_address]
277 set get_remote_address gdbserver_default_get_remote_address
279 if [target_info exists gdbserver,get_comm_port] {
280 set get_comm_port [target_info gdbserver,get_comm_port]
282 set get_comm_port gdbserver_default_get_comm_port
285 # Extract the protocol
286 if [target_info exists gdb_protocol] {
287 set protocol [target_info gdb_protocol]
289 set protocol "remote"
292 set gdbserver [find_gdbserver]
294 # Loop till we find a free port.
296 # Fire off the debug agent.
297 set gdbserver_command "$gdbserver"
299 # If gdbserver_reconnect will be called $gdbserver_reconnect_p must be
300 # set to true already during gdbserver_start.
301 global gdbserver_reconnect_p
304 if {![info exists gdbserver_reconnect_p] || !$gdbserver_reconnect_p} {
305 # GDB client could accidentally connect to a stale server.
306 append gdbserver_command " --once"
309 # Enable debug if set.
310 if [gdbserver_debug_enabled] {
311 global gdbserverdebug
313 foreach entry [split $gdbserverdebug ,] {
316 append gdbserver_command " --debug"
320 append gdbserver_command " --remote-debug"
325 # Ensure debugfile is only added if something has been enabled
327 set debugfile [standard_output_file gdbserver.debug]
328 append gdbserver_command " --debug-file=$debugfile"
332 if { $options != "" } {
333 append gdbserver_command " $options"
335 if { $debughost_gdbserver != "" } {
336 append gdbserver_command " $debughost_gdbserver"
338 if { $portnum != "" } {
339 if { $debughost_gdbserver == "" } {
340 append gdbserver_command " "
342 append gdbserver_command "[$get_comm_port $portnum]"
344 if { $arguments != "" } {
345 append gdbserver_command " $arguments"
348 gdbserver_write_cmd_file $gdbserver_command
350 global server_spawn_id
351 set server_spawn_id [remote_spawn target $gdbserver_command]
353 # GDBserver doesn't do inferior I/O through GDB. But we can
354 # talk to the program using GDBserver's tty instead.
355 global inferior_spawn_id
356 set inferior_spawn_id $server_spawn_id
358 # Wait for the server to open its TCP socket, so that GDB can connect.
363 -re "Listening on" { }
364 -re "Can't (bind address|listen on socket): Address already in use\\.\r\n" {
365 verbose -log "Port $portnum is already in use."
366 if ![target_info exists gdb,socketport] {
367 # Bump the port number to avoid the conflict.
368 wait -i $expect_out(spawn_id)
373 -re ".*: cannot resolve name: .*\r\n" {
374 error "gdbserver cannot resolve name."
377 error "Timeout waiting for gdbserver response."
383 return [list $protocol [$get_remote_address $debughost $portnum]]
386 # Start a gdbserver process running SERVER_EXEC, and connect GDB
387 # to it. CHILD_ARGS are passed to the inferior.
389 # Returns the target protocol and socket to connect to.
391 proc gdbserver_spawn { child_args } {
392 set target_exec [gdbserver_download_current_prog]
394 # Fire off the debug agent. This flavour of gdbserver takes as
395 # arguments the port information, the name of the executable file to
396 # be debugged, and any arguments.
397 set arguments "$target_exec"
398 if { $child_args != "" } {
399 append arguments " $child_args"
401 return [gdbserver_start "" $arguments]
404 # Close the GDBserver connection.
406 proc close_gdbserver {} {
407 global server_spawn_id
409 # We can't just call close, because if gdbserver is local then that means
410 # that it will get a SIGHUP. Doing it this way could also allow us to
411 # get at the inferior's input or output if necessary, and means that we
412 # don't need to redirect output.
414 if {![info exists server_spawn_id]} {
418 verbose "Quitting GDBserver"
420 catch "close -i $server_spawn_id"
421 catch "wait -i $server_spawn_id"
422 unset server_spawn_id
425 # Hook into GDB exit, and close GDBserver. We must load this
426 # explicitly here, and rename the procedures we want to override.
427 load_lib mi-support.exp
429 if { [info procs gdbserver_orig_gdb_exit] == "" } {
430 rename gdb_exit gdbserver_orig_gdb_exit
431 rename mi_gdb_exit gdbserver_orig_mi_gdb_exit
434 # Cleanup gdbserver $server_spawn_id
436 proc gdbserver_exit { is_mi } {
437 global gdb_spawn_id server_spawn_id
440 if {[info exists gdb_spawn_id] && [info exists server_spawn_id]} {
441 # GDB may be terminated in an expected way or an unexpected way,
442 # but DejaGNU doesn't know that, so gdb_spawn_id isn't unset.
443 # Catch the exceptions.
446 set monitor_exit "-interpreter-exec console \"monitor exit\""
448 set monitor_exit "monitor exit"
450 send_gdb "$monitor_exit\n";
451 # We use expect rather than gdb_expect because
452 # we want to suppress printing exception messages, otherwise,
453 # remote_expect, invoked by gdb_expect, prints the exceptions.
456 -i "$gdb_spawn_id" -re "$gdb_prompt $" {
458 if { [info exists server_spawn_id] } {
462 -i "$server_spawn_id" eof {
463 wait -i $expect_out(spawn_id)
464 unset server_spawn_id
465 if { ! $have_prompt } {
470 warning "Timed out waiting for EOF in server after $monitor_exit"
478 # Local version of gdb_exit that also cleans up gdbserver $server_spawn_id.
480 proc gdbserver_gdb_exit { is_mi } {
481 global gdb_spawn_id server_spawn_id
483 global gdbserver_reconnect_p
485 # Leave GDBserver running if we're exiting GDB in order to
486 # reconnect to the same instance of GDBserver again.
487 if {[info exists gdbserver_reconnect_p] && $gdbserver_reconnect_p} {
489 gdbserver_orig_mi_gdb_exit
491 gdbserver_orig_gdb_exit
496 gdbserver_exit $is_mi
499 gdbserver_orig_mi_gdb_exit
501 gdbserver_orig_gdb_exit
509 proc mi_gdb_exit {} {
513 # Start a gdbserver process running HOST_EXEC and pass CHILD_ARGS
514 # to it. Return 0 on success, or non-zero on failure: 2 if gdbserver
515 # failed to start or 1 if we couldn't connect to it.
517 proc gdbserver_run { child_args } {
518 global gdbserver_protocol
519 global gdbserver_gdbport
521 # Kill anything running before we try to start gdbserver, in case
522 # we are sharing a serial connection.
524 send_gdb "kill\n" optional
526 -re "Kill the program being debugged. .y or n. $" {
528 verbose "\t\tKilling previous program being debugged"
531 -re "$gdb_prompt $" {
536 if { [catch { gdbserver_spawn $child_args } res] == 1 } {
540 set gdbserver_protocol [lindex $res 0]
541 set gdbserver_gdbport [lindex $res 1]
543 return [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
546 # Reconnect to the previous gdbserver session.
548 proc gdbserver_reconnect { } {
549 global gdbserver_protocol
550 global gdbserver_gdbport
552 global gdbserver_reconnect_p
553 if {![info exists gdbserver_reconnect_p] || !$gdbserver_reconnect_p} {
554 error "gdbserver_reconnect_p is not set before gdbserver_reconnect"
558 return [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
561 # Start gdbserver in extended mode with OPTIONS and connect to it. Note
562 # this frobs $gdbserver_protocol, so should be used only from a board
563 # that usually connects in target remote mode.
564 proc gdbserver_start_extended { {options ""} } {
565 global gdbserver_protocol
566 global gdbserver_gdbport
569 set gdbserver_options "--multi"
571 if { $options != "" } {
572 append gdbserver_options " $options"
575 if { [catch { gdbserver_start $gdbserver_options "" } res] == 1 } {
579 set gdbserver_protocol [lindex $res 0]
580 if { [string first "extended-" $gdbserver_protocol] != 0} {
581 set gdbserver_protocol "extended-$gdbserver_protocol"
583 set gdbserver_gdbport [lindex $res 1]
585 # Even if the board file is testing with target remote, our caller
586 # wants to test against gdbserver in extended-remote mode. Make sure to
587 # disable stub-like techniques.
590 return [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
593 # Start and connect to a gdbserver in extended/multi mode. Unlike
594 # gdbserver_start_extended, this does not frob $gdbserver_protocol.
596 proc gdbserver_start_multi { } {
597 global gdbserver_protocol
598 global gdbserver_gdbport
600 if { [catch { gdbserver_start "--multi" "" } res] == 1 } {
604 set gdbserver_protocol [lindex $res 0]
605 set gdbserver_gdbport [lindex $res 1]
607 return [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
610 # Start a gdbserver process in multi/extended mode, and have GDB
611 # connect to it (MI version). Return 0 on success, or non-zero on
614 proc mi_gdbserver_start_multi { } {
615 global gdbserver_protocol
616 global gdbserver_gdbport
618 if { [catch { gdbserver_start "--multi" "" } res] == 1 } {
622 set gdbserver_protocol [lindex $res 0]
623 set gdbserver_gdbport [lindex $res 1]
625 return [mi_gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
628 # Check if debugging is enabled for gdbserver.
630 proc gdbserver_debug_enabled { } {
631 global gdbserverdebug
633 # If not already read, get the debug setting from environment or board setting.
634 if ![info exists gdbserverdebug] {
636 if [info exists env(GDBSERVER_DEBUG)] {
637 set gdbserverdebug $env(GDBSERVER_DEBUG)
638 } elseif [target_info exists gdbserver,debug] {
639 set gdbserverdebug [target_info gdbserver,debug]
645 # Expand the all option
646 if { $gdbserverdebug == "all" } {
647 set gdbserverdebug "debug,remote,replay"
650 # Ensure it is not empty.
651 return [expr { $gdbserverdebug != "" }]
654 # Write the command line used to invocate gdbserver to the cmd file.
656 proc gdbserver_write_cmd_file { cmdline } {
657 set logfile [standard_output_file_with_gdb_instance gdbserver.cmd]
658 set cmd_file [open $logfile w]
659 puts $cmd_file $cmdline
660 catch "close $cmd_file"
663 # Override gdb_debug_init so that we can set replay logging in GDB if required.
664 # Backup the original function so we can call it afterwards
666 rename gdb_debug_init _gdb_debug_init
668 proc gdb_debug_init { } {
669 global gdbserverdebug
672 if [gdbserver_debug_enabled] {
673 foreach entry [split $gdbserverdebug ,] {
674 if { $entry == "replay" } {
675 set replayfile [standard_output_file_with_gdb_instance gdbserver.replay]
676 send_gdb "set remotelogfile $replayfile\n" optional
678 -re "$gdb_prompt $" {}
684 # Now call the standard debug init function