gdb/testsuite/lib/mi-support.exp

   1 # Copyright 1999-2000, 2002-2005, 2007-2012 Free Software Foundation,
   2 # Inc.
   3
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 # This file was based on a file written by Fred Fish. (fnf@cygnus.com)
  18
  19 # Test setup routines that work with the MI interpreter.
  20
  21 # The variable mi_gdb_prompt is a regexp which matches the gdb mi prompt.
  22 # Set it if it is not already set.
  23 global mi_gdb_prompt
  24 if ![info exists mi_gdb_prompt] then {
  25     set mi_gdb_prompt "\[(\]gdb\[)\] \r\n"
  26 }
  27
  28 global mi_inferior_spawn_id
  29 global mi_inferior_tty_name
  30
  31 set MIFLAGS "-i=mi"
  32
  33 set thread_selected_re "=thread-selected,id=\"\[0-9\]+\"\r\n"
  34 set library_loaded_re "=library-loaded\[^\n\]+\"\r\n"
  35 set breakpoint_re "=(?:breakpoint-created|breakpoint-deleted)\[^\n\]+\"\r\n"
  36
  37 #
  38 # mi_gdb_exit -- exit the GDB, killing the target program if necessary
  39 #
  40 proc mi_gdb_exit {} {
  41     catch mi_uncatched_gdb_exit
  42 }
  43
  44 proc mi_uncatched_gdb_exit {} {
  45     global GDB
  46     global INTERNAL_GDBFLAGS GDBFLAGS
  47     global verbose
  48     global gdb_spawn_id;
  49     global gdb_prompt
  50     global mi_gdb_prompt
  51     global MIFLAGS
  52
  53     gdb_stop_suppressing_tests;
  54
  55     if { [info procs sid_exit] != "" } {
  56         sid_exit
  57     }
  58
  59     if ![info exists gdb_spawn_id] {
  60         return;
  61     }
  62
  63     verbose "Quitting $GDB $INTERNAL_GDBFLAGS $GDBFLAGS $MIFLAGS"
  64
  65     if { [is_remote host] && [board_info host exists fileid] } {
  66         send_gdb "999-gdb-exit\n";
  67         gdb_expect 10 {
  68             -re "y or n" {
  69                 send_gdb "y\n";
  70                 exp_continue;
  71             }
  72             -re "Undefined command.*$gdb_prompt $" {
  73                 send_gdb "quit\n"
  74                 exp_continue;
  75             }
  76             -re "DOSEXIT code" { }
  77             default { }
  78         }
  79     }
  80
  81     if ![is_remote host] {
  82         remote_close host;
  83     }
  84     unset gdb_spawn_id
  85 }
  86
  87 #
  88 # default_mi_gdb_start [INFERIOR_PTY] -- start gdb running, default procedure
  89 #
  90 # INFERIOR_PTY should be set to separate-inferior-tty to have the inferior work
  91 # with it's own PTY. If set to same-inferior-tty, the inferior shares GDB's PTY.
  92 # The default value is same-inferior-tty.
  93 #
  94 # When running over NFS, particularly if running many simultaneous
  95 # tests on different hosts all using the same server, things can
  96 # get really slow.  Give gdb at least 3 minutes to start up.
  97 #
  98 proc default_mi_gdb_start { args } {
  99     global verbose use_gdb_stub
 100     global GDB
 101     global INTERNAL_GDBFLAGS GDBFLAGS
 102     global gdb_prompt
 103     global mi_gdb_prompt
 104     global timeout
 105     global gdb_spawn_id;
 106     global MIFLAGS
 107
 108     gdb_stop_suppressing_tests;
 109     set inferior_pty no-tty
 110
 111     # Set the default value, it may be overriden later by specific testfile.
 112     set use_gdb_stub [target_info exists use_gdb_stub]
 113
 114     if { [llength $args] == 1} {
 115         set inferior_pty [lindex $args 0]
 116     }
 117
 118     set separate_inferior_pty [string match $inferior_pty separate-inferior-tty]
 119
 120     # Start SID.
 121     if { [info procs sid_start] != "" } {
 122         verbose "Spawning SID"
 123         sid_start
 124     }
 125
 126     verbose "Spawning $GDB $INTERNAL_GDBFLAGS $GDBFLAGS $MIFLAGS"
 127
 128     if [info exists gdb_spawn_id] {
 129         return 0;
 130     }
 131
 132     if ![is_remote host] {
 133         if { [which $GDB] == 0 } then {
 134             perror "$GDB does not exist."
 135             exit 1
 136         }
 137     }
 138
 139     # Create the new PTY for the inferior process.
 140     if { $separate_inferior_pty } {
 141         spawn -pty
 142         global mi_inferior_spawn_id
 143         global mi_inferior_tty_name
 144         set mi_inferior_spawn_id $spawn_id
 145         set mi_inferior_tty_name $spawn_out(slave,name)
 146     }
 147
 148     set res [remote_spawn host "$GDB $INTERNAL_GDBFLAGS $GDBFLAGS $MIFLAGS [host_info gdb_opts]"];
 149     if { $res < 0 || $res == "" } {
 150         perror "Spawning $GDB failed."
 151         return 1;
 152     }
 153     gdb_expect {
 154         -re "~\"GNU.*\r\n~\".*$mi_gdb_prompt$" {
 155             # We have a new format mi startup prompt.  If we are
 156             # running mi1, then this is an error as we should be
 157             # using the old-style prompt.
 158             if { $MIFLAGS == "-i=mi1" } {
 159                 perror "(mi startup) Got unexpected new mi prompt."
 160                 remote_close host;
 161                 return -1;
 162             }
 163             verbose "GDB initialized."
 164         }
 165         -re "\[^~\].*$mi_gdb_prompt$" {
 166             # We have an old format mi startup prompt.  If we are
 167             # not running mi1, then this is an error as we should be
 168             # using the new-style prompt.
 169             if { $MIFLAGS != "-i=mi1" } {
 170                 perror "(mi startup) Got unexpected old mi prompt."
 171                 remote_close host;
 172                 return -1;
 173             }
 174             verbose "GDB initialized."
 175         }
 176         -re ".*unrecognized option.*for a complete list of options." {
 177             untested "Skip mi tests (not compiled with mi support)."
 178             remote_close host;
 179             return -1;
 180         }
 181         -re ".*Interpreter `mi' unrecognized." {
 182             untested "Skip mi tests (not compiled with mi support)."
 183             remote_close host;
 184             return -1;
 185         }
 186         timeout {
 187             perror "(timeout) GDB never initialized after 10 seconds."
 188             remote_close host;
 189             return -1
 190         }
 191     }
 192     set gdb_spawn_id -1;
 193
 194     # FIXME: mi output does not go through pagers, so these can be removed.
 195     # force the height to "unlimited", so no pagers get used
 196     send_gdb "100-gdb-set height 0\n"
 197     gdb_expect 10 {
 198         -re ".*100-gdb-set height 0\r\n100\\\^done\r\n$mi_gdb_prompt$" {
 199             verbose "Setting height to 0." 2
 200         }
 201         timeout {
 202             warning "Couldn't set the height to 0"
 203         }
 204     }
 205     # force the width to "unlimited", so no wraparound occurs
 206     send_gdb "101-gdb-set width 0\n"
 207     gdb_expect 10 {
 208         -re ".*101-gdb-set width 0\r\n101\\\^done\r\n$mi_gdb_prompt$" {
 209             verbose "Setting width to 0." 2
 210         }
 211         timeout {
 212             warning "Couldn't set the width to 0."
 213         }
 214     }
 215     # If allowing the inferior to have its own PTY then assign the inferior
 216     # its own terminal device here.
 217     if { $separate_inferior_pty } {
 218         send_gdb "102-inferior-tty-set $mi_inferior_tty_name\n"
 219         gdb_expect 10 {
 220             -re ".*102\\\^done\r\n$mi_gdb_prompt$" {
 221                 verbose "redirect inferior output to new terminal device."
 222             }
 223             timeout {
 224                 warning "Couldn't redirect inferior output." 2
 225             }
 226         }
 227     }
 228
 229     mi_detect_async
 230
 231     return 0;
 232 }
 233
 234 #
 235 # Overridable function. You can override this function in your
 236 # baseboard file.
 237 #
 238 proc mi_gdb_start { args } {
 239   return [default_mi_gdb_start $args]
 240 }
 241
 242 # Many of the tests depend on setting breakpoints at various places and
 243 # running until that breakpoint is reached.  At times, we want to start
 244 # with a clean-slate with respect to breakpoints, so this utility proc
 245 # lets us do this without duplicating this code everywhere.
 246 #
 247
 248 proc mi_delete_breakpoints {} {
 249     global mi_gdb_prompt
 250
 251 # FIXME: The mi operation won't accept a prompt back and will use the 'all' arg
 252     send_gdb "102-break-delete\n"
 253     gdb_expect 30 {
 254          -re "Delete all breakpoints.*y or n.*$" {
 255             send_gdb "y\n";
 256             exp_continue
 257          }
 258          -re "102-break-delete\r\n102\\\^done\r\n$mi_gdb_prompt$" {
 259             # This happens if there were no breakpoints
 260          }
 261          timeout { perror "Delete all breakpoints in mi_delete_breakpoints (timeout)" ; return }
 262     }
 263
 264 # The correct output is not "No breakpoints or watchpoints." but an
 265 # empty BreakpointTable. Also, a query is not acceptable with mi.
 266     send_gdb "103-break-list\n"
 267     gdb_expect 30 {
 268          -re "103-break-list\r\n103\\\^done,BreakpointTable=\{\}\r\n$mi_gdb_prompt$" {}
 269          -re "103-break-list\r\n103\\\^done,BreakpointTable=\{nr_rows=\".\",nr_cols=\".\",hdr=\\\[\{width=\".*\",alignment=\".*\",col_name=\"number\",colhdr=\"Num\"\}.*colhdr=\"Type\".*colhdr=\"Disp\".*colhdr=\"Enb\".*colhdr=\"Address\".*colhdr=\"What\".*\\\],body=\\\[\\\]\}\r\n$mi_gdb_prompt$" {}
 270          -re "103-break-list\r\n103\\\^doneNo breakpoints or watchpoints.\r\n\r\n$mi_gdb_prompt$" {warning "Unexpected console text received"}
 271          -re "$mi_gdb_prompt$" { perror "Breakpoints not deleted" ; return }
 272          -re "Delete all breakpoints.*or n.*$" {
 273             warning "Unexpected prompt for breakpoints deletion";
 274             send_gdb "y\n";
 275             exp_continue
 276         }
 277          timeout { perror "-break-list (timeout)" ; return }
 278     }
 279 }
 280
 281 proc mi_gdb_reinitialize_dir { subdir } {
 282     global mi_gdb_prompt
 283     global MIFLAGS
 284
 285     global suppress_flag
 286     if { $suppress_flag } {
 287         return
 288     }
 289
 290     if [is_remote host] {
 291         return "";
 292     }
 293
 294     if { $MIFLAGS == "-i=mi1" } {
 295       send_gdb "104-environment-directory\n"
 296       gdb_expect 60 {
 297         -re ".*Reinitialize source path to empty.*y or n. " {
 298             warning "Got confirmation prompt for dir reinitialization."
 299             send_gdb "y\n"
 300             gdb_expect 60 {
 301                 -re "$mi_gdb_prompt$" {}
 302                 timeout {error "Dir reinitialization failed (timeout)"}
 303             }
 304         }
 305         -re "$mi_gdb_prompt$" {}
 306         timeout {error "Dir reinitialization failed (timeout)"}
 307       }
 308     } else {
 309       send_gdb "104-environment-directory -r\n"
 310       gdb_expect 60 {
 311         -re "104\\\^done,source-path=.*\r\n$mi_gdb_prompt$" {}
 312         -re "$mi_gdb_prompt$" {}
 313         timeout {error "Dir reinitialization failed (timeout)"}
 314       }
 315     }
 316
 317     send_gdb "105-environment-directory $subdir\n"
 318     gdb_expect 60 {
 319         -re "Source directories searched.*$mi_gdb_prompt$" {
 320             verbose "Dir set to $subdir"
 321         }
 322         -re "105\\\^done.*\r\n$mi_gdb_prompt$" {
 323             # FIXME: We return just the prompt for now.
 324             verbose "Dir set to $subdir"
 325             # perror "Dir \"$subdir\" failed."
 326         }
 327     }
 328 }
 329
 330 # Send GDB the "target" command.
 331 # FIXME: Some of these patterns are not appropriate for MI.  Based on
 332 # config/monitor.exp:gdb_target_command.
 333 proc mi_gdb_target_cmd { targetname serialport } {
 334     global mi_gdb_prompt
 335
 336     set serialport_re [string_to_regexp $serialport]
 337     for {set i 1} {$i <= 3} {incr i} {
 338         send_gdb "47-target-select $targetname $serialport\n"
 339         gdb_expect 60 {
 340             -re "47\\^connected.*$mi_gdb_prompt" {
 341                 verbose "Set target to $targetname";
 342                 return 0;
 343             }
 344             -re "unknown host.*$mi_gdb_prompt" {
 345                 verbose "Couldn't look up $serialport"
 346             }
 347             -re "Couldn't establish connection to remote.*$mi_gdb_prompt$" {
 348                 verbose "Connection failed";
 349             }
 350             -re "Remote MIPS debugging.*$mi_gdb_prompt$" {
 351                 verbose "Set target to $targetname";
 352                 return 0;
 353             }
 354             -re "Remote debugging using .*$serialport_re.*$mi_gdb_prompt$" {
 355                 verbose "Set target to $targetname";
 356                 return 0;
 357             }
 358             -re "Remote target $targetname connected to.*$mi_gdb_prompt$" {
 359                 verbose "Set target to $targetname";
 360                 return 0;
 361             }
 362             -re "Connected to.*$mi_gdb_prompt$" {
 363                 verbose "Set target to $targetname";
 364                 return 0;
 365             }
 366             -re "Ending remote.*$mi_gdb_prompt$" { }
 367             -re "Connection refused.*$mi_gdb_prompt$" {
 368                 verbose "Connection refused by remote target.  Pausing, and trying again."
 369                 sleep 5
 370                 continue
 371             }
 372             -re "Non-stop mode requested, but remote does not support non-stop.*$mi_gdb_prompt" {
 373                 unsupported "Non-stop mode not supported"
 374                 return 1
 375             }
 376             -re "Timeout reading from remote system.*$mi_gdb_prompt$" {
 377                 verbose "Got timeout error from gdb.";
 378             }
 379             timeout {
 380                 send_gdb "\ 3";
 381                 break
 382             }
 383         }
 384     }
 385     return 1
 386 }
 387
 388 #
 389 # load a file into the debugger (file command only).
 390 # return a -1 if anything goes wrong.
 391 #
 392 proc mi_gdb_file_cmd { arg } {
 393     global verbose
 394     global loadpath
 395     global loadfile
 396     global GDB
 397     global mi_gdb_prompt
 398     global last_loaded_file
 399     upvar timeout timeout
 400
 401     set last_loaded_file $arg
 402
 403     if [is_remote host] {
 404         set arg [remote_download host $arg];
 405         if { $arg == "" } {
 406             error "download failed"
 407             return -1;
 408         }
 409     }
 410
 411 # FIXME: Several of these patterns are only acceptable for console
 412 # output.  Queries are an error for mi.
 413     send_gdb "105-file-exec-and-symbols $arg\n"
 414     gdb_expect 120 {
 415         -re "Reading symbols from.*done.*$mi_gdb_prompt$" {
 416             verbose "\t\tLoaded $arg into the $GDB"
 417             return 0
 418         }
 419         -re "has no symbol-table.*$mi_gdb_prompt$" {
 420             perror "$arg wasn't compiled with \"-g\""
 421             return -1
 422         }
 423         -re "Load new symbol table from \".*\".*y or n. $" {
 424             send_gdb "y\n"
 425             gdb_expect 120 {
 426                 -re "Reading symbols from.*done.*$mi_gdb_prompt$" {
 427                     verbose "\t\tLoaded $arg with new symbol table into $GDB"
 428                     # All OK
 429                 }
 430                 timeout {
 431                     perror "(timeout) Couldn't load $arg, other program already loaded."
 432                     return -1
 433                 }
 434             }
 435         }
 436         -re "No such file or directory.*$mi_gdb_prompt$" {
 437             perror "($arg) No such file or directory\n"
 438             return -1
 439         }
 440         -re "105-file-exec-and-symbols .*\r\n105\\\^done\r\n$mi_gdb_prompt$" {
 441             # We (MI) are just giving the prompt back for now, instead of giving
 442             # some acknowledgement.
 443             return 0
 444         }
 445         timeout {
 446             perror "couldn't load $arg into $GDB (timed out)."
 447             return -1
 448         }
 449         eof {
 450             # This is an attempt to detect a core dump, but seems not to
 451             # work.  Perhaps we need to match .* followed by eof, in which
 452             # gdb_expect does not seem to have a way to do that.
 453             perror "couldn't load $arg into $GDB (end of file)."
 454             return -1
 455         }
 456     }
 457 }
 458
 459 #
 460 # connect to the target and download a file, if necessary.
 461 # return a -1 if anything goes wrong.
 462 #
 463 proc mi_gdb_target_load { } {
 464     global verbose
 465     global loadpath
 466     global loadfile
 467     global GDB
 468     global mi_gdb_prompt
 469
 470     if [target_info exists gdb_load_timeout] {
 471         set loadtimeout [target_info gdb_load_timeout]
 472     } else {
 473         set loadtimeout 1600
 474     }
 475
 476     if { [info procs gdbserver_gdb_load] != "" } {
 477         mi_gdb_test "kill" ".*" ""
 478         set res [gdbserver_gdb_load]
 479         set protocol [lindex $res 0]
 480         set gdbport [lindex $res 1]
 481
 482         if { [mi_gdb_target_cmd $protocol $gdbport] != 0 } {
 483             return -1
 484         }
 485     } elseif { [info procs send_target_sid] != "" } {
 486         # For SID, things get complex
 487         send_gdb "kill\n"
 488         gdb_expect 10 {
 489             -re ".*$mi_gdb_prompt$"
 490         }
 491         send_target_sid
 492         gdb_expect $loadtimeout {
 493             -re "\\^done.*$mi_gdb_prompt$" {
 494             }
 495             timeout {
 496                 perror "Unable to connect to SID target (timeout)"
 497                 return -1
 498             }
 499         }
 500         send_gdb "48-target-download\n"
 501         gdb_expect $loadtimeout {
 502             -re "48\\^done.*$mi_gdb_prompt$" {
 503             }
 504             timeout {
 505                 perror "Unable to download to SID target (timeout)"
 506                 return -1
 507             }
 508         }
 509     } elseif { [target_info protocol] == "sim" } {
 510         # For the simulator, just connect to it directly.
 511         send_gdb "47-target-select sim\n"
 512         gdb_expect $loadtimeout {
 513             -re "47\\^connected.*$mi_gdb_prompt$" {
 514             }
 515             timeout {
 516                 perror "Unable to select sim target (timeout)"
 517                 return -1
 518             }
 519         }
 520         send_gdb "48-target-download\n"
 521         gdb_expect $loadtimeout {
 522             -re "48\\^done.*$mi_gdb_prompt$" {
 523             }
 524             timeout {
 525                 perror "Unable to download to sim target (timeout)"
 526                 return -1
 527             }
 528         }
 529     } elseif { [target_info gdb_protocol] == "remote" } {
 530         # remote targets
 531         if { [mi_gdb_target_cmd "remote" [target_info netport]] != 0 } {
 532             perror "Unable to connect to remote target"
 533             return -1
 534         }
 535         send_gdb "48-target-download\n"
 536         gdb_expect $loadtimeout {
 537             -re "48\\^done.*$mi_gdb_prompt$" {
 538             }
 539             timeout {
 540                 perror "Unable to download to remote target (timeout)"
 541                 return -1
 542             }
 543         }
 544     }
 545     return 0
 546 }
 547
 548 #
 549 # load a file into the debugger.
 550 # return a -1 if anything goes wrong.
 551 #
 552 proc mi_gdb_load { arg } {
 553     if { $arg != "" } {
 554         return [mi_gdb_file_cmd $arg]
 555     }
 556     return 0
 557 }
 558
 559 # mi_gdb_test COMMAND PATTERN MESSAGE [IPATTERN] -- send a command to gdb;
 560 #   test the result.
 561 #
 562 # COMMAND is the command to execute, send to GDB with send_gdb.  If
 563 #   this is the null string no command is sent.
 564 # PATTERN is the pattern to match for a PASS, and must NOT include
 565 #   the \r\n sequence immediately before the gdb prompt.
 566 # MESSAGE is the message to be printed.  (If this is the empty string,
 567 #   then sometimes we don't call pass or fail at all; I don't
 568 #   understand this at all.)
 569 # IPATTERN is the pattern to match for the inferior's output.  This parameter
 570 #   is optional.  If present, it will produce a PASS if the match is
 571 #   successful, and a FAIL if unsuccessful.
 572 #
 573 # Returns:
 574 #    1 if the test failed,
 575 #    0 if the test passes,
 576 #   -1 if there was an internal error.
 577 #
 578 proc mi_gdb_test { args } {
 579     global verbose
 580     global mi_gdb_prompt
 581     global GDB expect_out
 582     global inferior_exited_re async
 583     upvar timeout timeout
 584
 585     set command [lindex $args 0]
 586     set pattern [lindex $args 1]
 587     set message [lindex $args 2]
 588
 589     if [llength $args]==4 {
 590         set ipattern [lindex $args 3]
 591     }
 592
 593     if [llength $args]==5 {
 594         set question_string [lindex $args 3];
 595         set response_string [lindex $args 4];
 596     } else {
 597         set question_string "^FOOBAR$"
 598     }
 599
 600     if $verbose>2 then {
 601         send_user "Sending \"$command\" to gdb\n"
 602         send_user "Looking to match \"$pattern\"\n"
 603         send_user "Message is \"$message\"\n"
 604     }
 605
 606     set result -1
 607     set string "${command}\n";
 608     set string_regex [string_to_regexp $command]
 609
 610     if { $command != "" } {
 611         while { "$string" != "" } {
 612             set foo [string first "\n" "$string"];
 613             set len [string length "$string"];
 614             if { $foo < [expr $len - 1] } {
 615                 set str [string range "$string" 0 $foo];
 616                 if { [send_gdb "$str"] != "" } {
 617                     global suppress_flag;
 618
 619                     if { ! $suppress_flag } {
 620                         perror "Couldn't send $command to GDB.";
 621                     }
 622                     fail "$message";
 623                     return $result;
 624                 }
 625                 gdb_expect 2 {
 626                     -re "\[\r\n\]" { }
 627                     timeout { }
 628                 }
 629                 set string [string range "$string" [expr $foo + 1] end];
 630             } else {
 631                 break;
 632             }
 633         }
 634         if { "$string" != "" } {
 635             if { [send_gdb "$string"] != "" } {
 636                 global suppress_flag;
 637
 638                 if { ! $suppress_flag } {
 639                     perror "Couldn't send $command to GDB.";
 640                 }
 641                 fail "$message";
 642                 return $result;
 643             }
 644         }
 645     }
 646
 647     if [info exists timeout] {
 648         set tmt $timeout;
 649     } else {
 650         global timeout;
 651         if [info exists timeout] {
 652             set tmt $timeout;
 653         } else {
 654             set tmt 60;
 655         }
 656     }
 657     if {$async} {
 658         # With $prompt_re "" there may come arbitrary asynchronous response
 659         # from the previous command, before or after $string_regex.
 660         set string_regex ".*"
 661     }
 662     verbose -log "Expecting: ^($string_regex\[\r\n\]+)?($pattern\[\r\n\]+$mi_gdb_prompt\[ \]*)"
 663     gdb_expect $tmt {
 664          -re "\\*\\*\\* DOSEXIT code.*" {
 665              if { $message != "" } {
 666                  fail "$message";
 667              }
 668              gdb_suppress_entire_file "GDB died";
 669              return -1;
 670          }
 671          -re "Ending remote debugging.*$mi_gdb_prompt\[ \]*$" {
 672             if ![isnative] then {
 673                 warning "Can`t communicate to remote target."
 674             }
 675             gdb_exit
 676             gdb_start
 677             set result -1
 678         }
 679          -re "^($string_regex\[\r\n\]+)?($pattern\[\r\n\]+$mi_gdb_prompt\[ \]*)" {
 680             # At this point, $expect_out(1,string) is the MI input command.
 681             # and $expect_out(2,string) is the MI output command.
 682             # If $expect_out(1,string) is "", then there was no MI input command here.
 683
 684             # NOTE, there is no trailing anchor because with GDB/MI,
 685             # asynchronous responses can happen at any point, causing more
 686             # data to be available.  Normally an anchor is used to make
 687             # sure the end of the output is matched, however, $mi_gdb_prompt
 688             # is just as good of an anchor since mi_gdb_test is meant to
 689             # match a single mi output command.  If a second GDB/MI output
 690             # response is sent, it will be in the buffer for the next
 691             # time mi_gdb_test is called.
 692             if ![string match "" $message] then {
 693                 pass "$message"
 694             }
 695             set result 0
 696         }
 697          -re "(${question_string})$" {
 698             send_gdb "$response_string\n";
 699             exp_continue;
 700         }
 701          -re "Undefined.* command:.*$mi_gdb_prompt\[ \]*$" {
 702             perror "Undefined command \"$command\"."
 703             fail "$message"
 704             set result 1
 705         }
 706          -re "Ambiguous command.*$mi_gdb_prompt\[ \]*$" {
 707             perror "\"$command\" is not a unique command name."
 708             fail "$message"
 709             set result 1
 710         }
 711          -re "$inferior_exited_re with code \[0-9\]+.*$mi_gdb_prompt\[ \]*$" {
 712             if ![string match "" $message] then {
 713                 set errmsg "$message (the program exited)"
 714             } else {
 715                 set errmsg "$command (the program exited)"
 716             }
 717             fail "$errmsg"
 718             return -1
 719         }
 720          -re "The program is not being run.*$mi_gdb_prompt\[ \]*$" {
 721             if ![string match "" $message] then {
 722                 set errmsg "$message (the program is no longer running)"
 723             } else {
 724                 set errmsg "$command (the program is no longer running)"
 725             }
 726             fail "$errmsg"
 727             return -1
 728         }
 729          -re ".*$mi_gdb_prompt\[ \]*$" {
 730             if ![string match "" $message] then {
 731                 fail "$message"
 732             }
 733             set result 1
 734         }
 735          "<return>" {
 736             send_gdb "\n"
 737             perror "Window too small."
 738             fail "$message"
 739         }
 740          -re "\\(y or n\\) " {
 741             send_gdb "n\n"
 742             perror "Got interactive prompt."
 743             fail "$message"
 744         }
 745          eof {
 746              perror "Process no longer exists"
 747              if { $message != "" } {
 748                  fail "$message"
 749              }
 750              return -1
 751         }
 752          full_buffer {
 753             perror "internal buffer is full."
 754             fail "$message"
 755         }
 756         timeout {
 757             if ![string match "" $message] then {
 758                 fail "$message (timeout)"
 759             }
 760             set result 1
 761         }
 762     }
 763
 764     # If the GDB output matched, compare the inferior output.
 765     if { $result == 0 } {
 766         if [ info exists ipattern ] {
 767             if { ![target_info exists gdb,noinferiorio] } {
 768                 global mi_inferior_spawn_id
 769                 expect {
 770                     -i $mi_inferior_spawn_id -re "$ipattern" {
 771                         pass "$message inferior output"
 772                     }
 773                     timeout {
 774                         fail "$message inferior output (timeout)"
 775                         set result 1
 776                     }
 777                 }
 778             } else {
 779                 unsupported "$message inferior output"
 780             }
 781         }
 782     }
 783
 784     return $result
 785 }
 786
 787 #
 788 # MI run command.  (A modified version of gdb_run_cmd)
 789 #
 790
 791 # In patterns, the newline sequence ``\r\n'' is matched explicitly as
 792 # ``.*$'' could swallow up output that we attempt to match elsewhere.
 793
 794 proc mi_run_cmd_full {use_mi_command args} {
 795     global suppress_flag
 796     if { $suppress_flag } {
 797         return -1
 798     }
 799     global mi_gdb_prompt use_gdb_stub
 800     global thread_selected_re
 801     global library_loaded_re
 802
 803     if {$use_mi_command} {
 804         set run_prefix "220-exec-"
 805         set run_match "220"
 806     } else {
 807         set run_prefix ""
 808         set run_match ""
 809     }
 810
 811     if [target_info exists gdb_init_command] {
 812         send_gdb "[target_info gdb_init_command]\n";
 813         gdb_expect 30 {
 814             -re "$mi_gdb_prompt$" { }
 815             default {
 816                 perror "gdb_init_command for target failed";
 817                 return -1;
 818             }
 819         }
 820     }
 821
 822     if { [mi_gdb_target_load] < 0 } {
 823         return -1
 824     }
 825
 826     if $use_gdb_stub {
 827         if [target_info exists gdb,do_reload_on_run] {
 828             send_gdb "${run_prefix}continue\n";
 829             gdb_expect 60 {
 830                 -re "${run_match}\\^running\[\r\n\]+\\*running,thread-id=\"\[^\"\]+\"\r\n$mi_gdb_prompt" {}
 831                 default {}
 832             }
 833             return 0;
 834         }
 835
 836         if [target_info exists gdb,start_symbol] {
 837             set start [target_info gdb,start_symbol];
 838         } else {
 839             set start "start";
 840         }
 841
 842         # HACK: Should either use 000-jump or fix the target code
 843         # to better handle RUN.
 844         send_gdb  "jump *$start\n"
 845         warning "Using CLI jump command, expect run-to-main FAIL"
 846         return 0
 847     }
 848
 849     send_gdb "${run_prefix}run $args\n"
 850     gdb_expect {
 851         -re "${run_match}\\^running\r\n(\\*running,thread-id=\"\[^\"\]+\"\r\n|=thread-created,id=\"1\",group-id=\"\[0-9\]+\"\r\n)*(${library_loaded_re})*(${thread_selected_re})?${mi_gdb_prompt}" {
 852         }
 853         -re "\\^error,msg=\"The target does not support running in non-stop mode.\"" {
 854             unsupported "Non-stop mode not supported"
 855             return -1
 856         }
 857         timeout {
 858             perror "Unable to start target"
 859             return -1
 860         }
 861     }
 862     # NOTE: Shortly after this there will be a ``000*stopped,...(gdb)''
 863
 864     return 0
 865 }
 866
 867 # A wrapper for mi_run_cmd_full which uses -exec-run and
 868 # -exec-continue, as appropriate.  ARGS are passed verbatim to
 869 # mi_run_cmd_full.
 870 proc mi_run_cmd {args} {
 871     return [eval mi_run_cmd_full 1 $args]
 872 }
 873
 874 # A wrapper for mi_run_cmd_full which uses the CLI commands 'run' and
 875 # 'continue', as appropriate.  ARGS are passed verbatim to
 876 # mi_run_cmd_full.
 877 proc mi_run_with_cli {args} {
 878     return [eval mi_run_cmd_full 0 $args]
 879 }
 880
 881 #
 882 # Just like run-to-main but works with the MI interface
 883 #
 884
 885 proc mi_run_to_main { } {
 886     global suppress_flag
 887     if { $suppress_flag } {
 888         return -1
 889     }
 890
 891     global srcdir
 892     global subdir
 893     global binfile
 894     global srcfile
 895
 896     mi_delete_breakpoints
 897     mi_gdb_reinitialize_dir $srcdir/$subdir
 898     mi_gdb_load ${binfile}
 899
 900     mi_runto main
 901 }
 902
 903
 904 # Just like gdb's "runto" proc, it will run the target to a given
 905 # function.  The big difference here between mi_runto and mi_execute_to
 906 # is that mi_execute_to must have the inferior running already.  This
 907 # proc will (like gdb's runto) (re)start the inferior, too.
 908 #
 909 # FUNC is the linespec of the place to stop (it inserts a breakpoint here).
 910 # It returns:
 911 #   -1  if test suppressed, failed, timedout
 912 #    0  if test passed
 913
 914 proc mi_runto_helper {func run_or_continue} {
 915   global suppress_flag
 916   if { $suppress_flag } {
 917     return -1
 918   }
 919
 920   global mi_gdb_prompt expect_out
 921   global hex decimal fullname_syntax
 922
 923   set test "mi runto $func"
 924   mi_gdb_test "200-break-insert -t $func" \
 925     "200\\^done,bkpt=\{number=\"\[0-9\]+\",type=\"breakpoint\",disp=\"del\",enabled=\"y\",addr=\"$hex\",func=\"$func\(\\\(.*\\\)\)?\",file=\".*\",line=\"\[0-9\]*\",times=\"0\",original-location=\".*\"\}" \
 926     "breakpoint at $func"
 927
 928   if {![regexp {number="[0-9]+"} $expect_out(buffer) str]
 929       || ![scan $str {number="%d"} bkptno]} {
 930     set bkptno {[0-9]+}
 931   }
 932
 933   if {$run_or_continue == "run"} {
 934       if { [mi_run_cmd] < 0 } {
 935           return -1
 936       }
 937   } else {
 938       mi_send_resuming_command "exec-continue" "$test"
 939   }
 940
 941   mi_expect_stop "breakpoint-hit" $func ".*" ".*" "\[0-9\]+" { "" "disp=\"del\"" } $test
 942 }
 943
 944 proc mi_runto {func} {
 945     return [mi_runto_helper $func "run"]
 946 }
 947
 948 # Next to the next statement
 949 # For return values, see mi_execute_to_helper
 950
 951 proc mi_next { test } {
 952   return [mi_next_to {.*} {.*} {.*} {.*} $test]
 953 }
 954
 955
 956 # Step to the next statement
 957 # For return values, see mi_execute_to_helper
 958
 959 proc mi_step { test } {
 960   return [mi_step_to {.*} {.*} {.*} {.*} $test]
 961 }
 962
 963 set async "unknown"
 964
 965 proc mi_detect_async {} {
 966     global async
 967     global mi_gdb_prompt
 968
 969     send_gdb "show target-async\n"
 970
 971     gdb_expect {
 972         -re ".*Controlling the inferior in asynchronous mode is on...*$mi_gdb_prompt$" {
 973             set async 1
 974         }
 975         -re ".*$mi_gdb_prompt$" {
 976             set async 0
 977         }
 978         timeout {
 979             set async 0
 980         }
 981     }
 982     return $async
 983 }
 984
 985 # Wait for MI *stopped notification to appear.
 986 # The REASON, FUNC, ARGS, FILE and LINE are regular expressions
 987 # to match against whatever is output in *stopped.  FILE may also match
 988 # filename of a file without debug info.  ARGS should not include [] the
 989 # list of argument is enclosed in, and other regular expressions should
 990 # not include quotes.
 991 # If EXTRA is a list of one element, it's the regular expression
 992 # for output expected right after *stopped, and before GDB prompt.
 993 # If EXTRA is a list of two elements, the first element is for
 994 # output right after *stopped, and the second element is output
 995 # right after reason field.  The regex after reason should not include
 996 # the comma separating it from the following fields.
 997 #
 998 # When we fail to match output at all, -1 is returned.  If FILE does
 999 # match and the target system has no debug info for FILE return 0.
1000 # Otherwise, the line at which we stop is returned.  This is useful when
1001 # exact line is not possible to specify for some reason -- one can pass
1002 # the .* or "\[0-9\]*" regexps for line, and then check the line
1003 # programmatically.
1004 #
1005 # Do not pass .* for any argument if you are expecting more than one stop.
1006 proc mi_expect_stop { reason func args file line extra test } {
1007
1008     global mi_gdb_prompt
1009     global hex
1010     global decimal
1011     global fullname_syntax
1012     global async
1013     global thread_selected_re
1014     global breakpoint_re
1015
1016     set after_stopped ""
1017     set after_reason ""
1018     if { [llength $extra] == 2 } {
1019         set after_stopped [lindex $extra 0]
1020         set after_reason [lindex $extra 1]
1021         set after_reason "${after_reason},"
1022     } elseif { [llength $extra] == 1 } {
1023         set after_stopped [lindex $extra 0]
1024     }
1025
1026     if {$async} {
1027         set prompt_re ""
1028     } else {
1029         set prompt_re "$mi_gdb_prompt$"
1030     }
1031
1032     if { $reason == "really-no-reason" } {
1033         gdb_expect {
1034           -re "\\*stopped\r\n$prompt_re" {
1035             pass "$test"
1036           }
1037           timeout {
1038               fail "$test (unknown output after running)"
1039           }
1040         }
1041         return
1042     }
1043
1044     if { $reason == "exited-normally" } {
1045
1046         gdb_expect {
1047           -re "\\*stopped,reason=\"exited-normally\"\r\n$prompt_re" {
1048             pass "$test"
1049           }
1050           -re ".*$mi_gdb_prompt$" {fail "continue to end (2)"}
1051           timeout {
1052               fail "$test (unknown output after running)"
1053           }
1054         }
1055         return
1056     }
1057
1058     set args "\\\[$args\\\]"
1059
1060     set bn ""
1061     if { $reason == "breakpoint-hit" } {
1062         set bn {bkptno="[0-9]+",}
1063     } elseif { $reason == "solib-event" } {
1064         set bn ".*"
1065     }
1066
1067     set r ""
1068     if { $reason != "" } {
1069         set r "reason=\"$reason\","
1070     }
1071
1072
1073     set a $after_reason
1074
1075     set any "\[^\n\]*"
1076
1077     verbose -log "mi_expect_stop: expecting: \\*stopped,${r}${a}${bn}frame=\{addr=\"$hex\",func=\"$func\",args=$args,(?:file=\"$any$file\",fullname=\"${fullname_syntax}$file\",line=\"$line\"|from=\"$file\")\}$after_stopped,thread-id=\"$decimal\",stopped-threads=$any\r\n($thread_selected_re|$breakpoint_re)*$prompt_re"
1078     gdb_expect {
1079         -re "\\*stopped,${r}${a}${bn}frame=\{addr=\"$hex\",func=\"$func\",args=$args,(?:file=\"$any$file\",fullname=\"${fullname_syntax}$file\",line=\"($line)\"|from=\"$file\")\}$after_stopped,thread-id=\"$decimal\",stopped-threads=$any\r\n($thread_selected_re|$breakpoint_re)*$prompt_re" {
1080             pass "$test"
1081             if {[array names expect_out "2,string"] != ""} {
1082                 return $expect_out(2,string)
1083             }
1084             # No debug info available but $file does match.
1085             return 0
1086         }
1087         -re "\\*stopped,${r}${a}${bn}frame=\{addr=\"$hex\",func=\"$any\",args=\[\\\[\{\]$any\[\\\]\}\],file=\"$any\",fullname=\"${fullname_syntax}$any\",line=\"\[0-9\]*\"\}$after_stopped,thread-id=\"$decimal\",stopped-threads=$any\r\n($thread_selected_re|$breakpoint_re)*$prompt_re" {
1088             verbose -log "got $expect_out(buffer)"
1089             fail "$test (stopped at wrong place)"
1090             return -1
1091         }
1092         -re ".*\r\n$mi_gdb_prompt$" {
1093             verbose -log "got $expect_out(buffer)"
1094             fail "$test (unknown output after running)"
1095             return -1
1096         }
1097         timeout {
1098             fail "$test (timeout)"
1099             return -1
1100         }
1101     }
1102 }
1103
1104 # Wait for MI *stopped notification related to an interrupt request to
1105 # appear.
1106 proc mi_expect_interrupt { test } {
1107     global mi_gdb_prompt
1108     global decimal
1109     global async
1110
1111     if {$async} {
1112         set prompt_re ""
1113     } else {
1114         set prompt_re "$mi_gdb_prompt$"
1115     }
1116
1117     set r "reason=\"signal-received\",signal-name=\"0\",signal-meaning=\"Signal 0\""
1118
1119     set any "\[^\n\]*"
1120
1121     # A signal can land anywhere, just ignore the location
1122     verbose -log "mi_expect_interrupt: expecting: \\*stopped,${r}$any\r\n$prompt_re"
1123     gdb_expect {
1124         -re "\\*stopped,${r}$any\r\n$prompt_re" {
1125             pass "$test"
1126             return 0;
1127         }
1128         -re ".*\r\n$mi_gdb_prompt$" {
1129             verbose -log "got $expect_out(buffer)"
1130             fail "$test (unknown output after running)"
1131             return -1
1132         }
1133         timeout {
1134             fail "$test (timeout)"
1135             return -1
1136         }
1137     }
1138 }
1139
1140 # cmd should not include the number or newline (i.e. "exec-step 3", not
1141 # "220-exec-step 3\n"
1142
1143 # Can not match -re ".*\r\n${mi_gdb_prompt}", because of false positives
1144 # after the first prompt is printed.
1145
1146 proc mi_execute_to { cmd reason func args file line extra test } {
1147     global suppress_flag
1148     if { $suppress_flag } {
1149         return -1
1150     }
1151
1152     mi_send_resuming_command "$cmd" "$test"
1153     set r [mi_expect_stop $reason $func $args $file $line $extra $test]
1154     return $r
1155 }
1156
1157 proc mi_next_to { func args file line test } {
1158     mi_execute_to "exec-next" "end-stepping-range" "$func" "$args" \
1159         "$file" "$line" "" "$test"
1160 }
1161
1162 proc mi_step_to { func args file line test } {
1163     mi_execute_to "exec-step" "end-stepping-range" "$func" "$args" \
1164         "$file" "$line" "" "$test"
1165 }
1166
1167 proc mi_finish_to { func args file line result ret test } {
1168     mi_execute_to "exec-finish" "function-finished" "$func" "$args" \
1169         "$file" "$line" \
1170         ",gdb-result-var=\"$result\",return-value=\"$ret\"" \
1171         "$test"
1172 }
1173
1174 proc mi_continue_to {func} {
1175     mi_runto_helper $func "continue"
1176 }
1177
1178 proc mi0_execute_to { cmd reason func args file line extra test } {
1179     mi_execute_to_helper "$cmd" "$reason" "$func" "\{$args\}" \
1180         "$file" "$line" "$extra" "$test"
1181 }
1182
1183 proc mi0_next_to { func args file line test } {
1184     mi0_execute_to "exec-next" "end-stepping-range" "$func" "$args" \
1185         "$file" "$line" "" "$test"
1186 }
1187
1188 proc mi0_step_to { func args file line test } {
1189     mi0_execute_to "exec-step" "end-stepping-range" "$func" "$args" \
1190         "$file" "$line" "" "$test"
1191 }
1192
1193 proc mi0_finish_to { func args file line result ret test } {
1194     mi0_execute_to "exec-finish" "function-finished" "$func" "$args" \
1195         "$file" "$line" \
1196         ",gdb-result-var=\"$result\",return-value=\"$ret\"" \
1197         "$test"
1198 }
1199
1200 proc mi0_continue_to { bkptno func args file line test } {
1201     mi0_execute_to "exec-continue" "breakpoint-hit\",bkptno=\"$bkptno" \
1202         "$func" "$args" "$file" "$line" "" "$test"
1203 }
1204
1205 # Creates a breakpoint and checks the reported fields are as expected
1206 proc mi_create_breakpoint { location number disp func file line address test } {
1207     verbose -log "Expecting: 222\\^done,bkpt=\{number=\"$number\",type=\"breakpoint\",disp=\"$disp\",enabled=\"y\",addr=\"$address\",func=\"$func\",file=\"$file\",fullname=\".*\",line=\"$line\",times=\"0\",original-location=\".*\"\}"
1208     mi_gdb_test "222-break-insert $location" \
1209         "222\\^done,bkpt=\{number=\"$number\",type=\"breakpoint\",disp=\"$disp\",enabled=\"y\",addr=\"$address\",func=\"$func\",file=\"$file\",fullname=\".*\",line=\"$line\",times=\"0\",original-location=\".*\"\}" \
1210         $test
1211 }
1212
1213 proc mi_list_breakpoints { expected test } {
1214     set fullname ".*"
1215
1216     set body ""
1217     set first 1
1218
1219     foreach item $expected {
1220         if {$first == 0} {
1221             set body "$body,"
1222             set first 0
1223         }
1224         set number [lindex $item 0]
1225         set disp [lindex $item 1]
1226         set func [lindex $item 2]
1227         set file [lindex $item 3]
1228         set line [lindex $item 4]
1229         set address [lindex $item 5]
1230         set body "${body}bkpt=\{number=\"$number\",type=\"breakpoint\",disp=\"$disp\",enabled=\"y\",addr=\"$address\",func=\"$func\",file=\".*$file\",${fullname},line=\"$line\",times=\"0\",original-location=\".*\"\}"
1231         set first 0
1232     }
1233
1234     verbose -log "Expecting: 666\\\^done,BreakpointTable=\{nr_rows=\".\",nr_cols=\".\",hdr=\\\[\{width=\".*\",alignment=\".*\",col_name=\"number\",colhdr=\"Num\"\}.*colhdr=\"Type\".*colhdr=\"Disp\".*colhdr=\"Enb\".*colhdr=\"Address\".*colhdr=\"What\".*\\\],body=\\\[$body\\\]\}"
1235     mi_gdb_test "666-break-list" \
1236         "666\\\^done,BreakpointTable=\{nr_rows=\".\",nr_cols=\".\",hdr=\\\[\{width=\".*\",alignment=\".*\",col_name=\"number\",colhdr=\"Num\"\}.*colhdr=\"Type\".*colhdr=\"Disp\".*colhdr=\"Enb\".*colhdr=\"Address\".*colhdr=\"What\".*\\\],body=\\\[$body\\\]\}" \
1237         $test
1238 }
1239
1240 # Creates varobj named NAME for EXPRESSION.
1241 # Name cannot be "-".
1242 proc mi_create_varobj { name expression testname } {
1243     mi_gdb_test "-var-create $name * $expression" \
1244         "\\^done,name=\"$name\",numchild=\"\[0-9\]+\",value=\".*\",type=.*,has_more=\"0\"" \
1245         $testname
1246 }
1247
1248 proc mi_create_floating_varobj { name expression testname } {
1249     mi_gdb_test "-var-create $name @ $expression" \
1250         "\\^done,name=\"$name\",numchild=\"\(-1\|\[0-9\]+\)\",value=\".*\",type=.*" \
1251         $testname
1252 }
1253
1254
1255 # Same as mi_create_varobj, but also checks the reported type
1256 # of the varobj.
1257 proc mi_create_varobj_checked { name expression type testname } {
1258     mi_gdb_test "-var-create $name * $expression" \
1259         "\\^done,name=\"$name\",numchild=\"\[0-9\]+\",value=\".*\",type=\"$type\".*" \
1260         $testname
1261 }
1262
1263 # Same as mi_create_floating_varobj, but assumes the test is creating
1264 # a dynamic varobj that has children, so the value must be "{...}".
1265 proc mi_create_dynamic_varobj {name expression testname} {
1266     mi_gdb_test "-var-create $name @ $expression" \
1267         "\\^done,name=\"$name\",numchild=\"\(-1\|\[0-9\]+\)\",value=\"{\\.\\.\\.}\",type=.*" \
1268         $testname
1269 }
1270
1271 # Deletes the specified NAME.
1272 proc mi_delete_varobj { name testname } {
1273     mi_gdb_test "-var-delete $name" \
1274         "\\^done,ndeleted=.*" \
1275         $testname
1276 }
1277
1278 # Updates varobj named NAME and checks that all varobjs in EXPECTED
1279 # are reported as updated, and no other varobj is updated.
1280 # Assumes that no varobj is out of scope and that no varobj changes
1281 # types.
1282 proc mi_varobj_update { name expected testname } {
1283     set er "\\^done,changelist=\\\["
1284     set first 1
1285     foreach item $expected {
1286         set v "{name=\"$item\",in_scope=\"true\",type_changed=\"false\",has_more=\".\"}"
1287         if {$first == 1} {
1288             set er "$er$v"
1289             set first 0
1290         } else {
1291             set er "$er,$v"
1292         }
1293     }
1294     set er "$er\\\]"
1295
1296     verbose -log "Expecting: $er" 2
1297     mi_gdb_test "-var-update $name" $er $testname
1298 }
1299
1300 proc mi_varobj_update_with_type_change { name new_type new_children testname } {
1301     set v "{name=\"$name\",in_scope=\"true\",type_changed=\"true\",new_type=\"$new_type\",new_num_children=\"$new_children\",has_more=\".\"}"
1302     set er "\\^done,changelist=\\\[$v\\\]"
1303     verbose -log "Expecting: $er"
1304     mi_gdb_test "-var-update $name" $er $testname
1305 }
1306
1307 # A helper that turns a key/value list into a regular expression
1308 # matching some MI output.
1309 proc mi_varobj_update_kv_helper {list} {
1310     set first 1
1311     set rx ""
1312     foreach {key value} $list {
1313         if {!$first} {
1314             append rx ,
1315         }
1316         set first 0
1317         if {$key == "new_children"} {
1318             append rx "$key=\\\[$value\\\]"
1319         } else {
1320             append rx "$key=\"$value\""
1321         }
1322     }
1323     return $rx
1324 }
1325
1326 # A helper for mi_varobj_update_dynamic that computes a match
1327 # expression given a child list.
1328 proc mi_varobj_update_dynamic_helper {children} {
1329     set crx ""
1330
1331     set first 1
1332     foreach child $children {
1333         if {!$first} {
1334             append crx ,
1335         }
1336         set first 0
1337         append crx "{"
1338         append crx [mi_varobj_update_kv_helper $child]
1339         append crx "}"
1340     }
1341
1342     return $crx
1343 }
1344
1345 # Update a dynamic varobj named NAME.  CHILDREN is a list of children
1346 # that have been updated; NEW_CHILDREN is a list of children that were
1347 # added to the primary varobj.  Each child is a list of key/value
1348 # pairs that are expected.  SELF is a key/value list holding
1349 # information about the varobj itself.  TESTNAME is the name of the
1350 # test.
1351 proc mi_varobj_update_dynamic {name testname self children new_children} {
1352     if {[llength $new_children]} {
1353         set newrx [mi_varobj_update_dynamic_helper $new_children]
1354         lappend self new_children $newrx
1355     }
1356     set selfrx [mi_varobj_update_kv_helper $self]
1357     set crx [mi_varobj_update_dynamic_helper $children]
1358
1359     set er "\\^done,changelist=\\\[\{name=\"$name\",in_scope=\"true\""
1360     append er ",$selfrx\}"
1361     if {"$crx" != ""} {
1362         append er ",$crx"
1363     }
1364     append er "\\\]"
1365
1366     verbose -log "Expecting: $er"
1367     mi_gdb_test "-var-update $name" $er $testname
1368 }
1369
1370 proc mi_check_varobj_value { name value testname } {
1371
1372     mi_gdb_test "-var-evaluate-expression $name" \
1373         "\\^done,value=\"$value\"" \
1374         $testname
1375 }
1376
1377 # Helper proc which constructs a child regexp for
1378 # mi_list_varobj_children and mi_varobj_update_dynamic.
1379 proc mi_child_regexp {children add_child} {
1380     set children_exp {}
1381     set whatever "\"\[^\"\]+\""
1382
1383     if {$add_child} {
1384         set pre "child="
1385     } else {
1386         set pre ""
1387     }
1388
1389     foreach item $children {
1390
1391         set name [lindex $item 0]
1392         set exp [lindex $item  1]
1393         set numchild [lindex $item 2]
1394         if {[llength $item] == 5} {
1395             set type [lindex $item 3]
1396             set value [lindex $item 4]
1397
1398             lappend children_exp\
1399                 "$pre{name=\"$name\",exp=\"$exp\",numchild=\"$numchild\",value=\"$value\",type=\"$type\"\(,thread-id=\"\[0-9\]+\")?}"
1400         } elseif {[llength $item] == 4} {
1401             set type [lindex $item 3]
1402
1403             lappend children_exp\
1404                 "$pre{name=\"$name\",exp=\"$exp\",numchild=\"$numchild\",type=\"$type\"\(,thread-id=\"\[0-9\]+\")?}"
1405         } else {
1406             lappend children_exp\
1407                 "$pre{name=\"$name\",exp=\"$exp\",numchild=\"$numchild\"(,thread-id=\"\[0-9\]+\")?}"
1408         }
1409     }
1410     return [join $children_exp ","]
1411 }
1412
1413 # Check the results of the:
1414 #
1415 #   -var-list-children VARNAME
1416 #
1417 # command.  The CHILDREN parement should be a list of lists.
1418 # Each inner list can have either 3 or 4 elements, describing
1419 # fields that gdb is expected to report for child variable object,
1420 # in the following order
1421 #
1422 #   - Name
1423 #   - Expression
1424 #   - Number of children
1425 #   - Type
1426 #
1427 # If inner list has 3 elements, the gdb is expected to output no
1428 # type for a child and no value.
1429 #
1430 # If the inner list has 4 elements, gdb output is expected to
1431 # have no value.
1432 #
1433 proc mi_list_varobj_children { varname children testname } {
1434     mi_list_varobj_children_range $varname "" "" [llength $children] $children \
1435       $testname
1436 }
1437
1438 # Like mi_list_varobj_children, but sets a subrange.  NUMCHILDREN is
1439 # the total number of children.
1440 proc mi_list_varobj_children_range {varname from to numchildren children testname} {
1441     set options ""
1442     if {[llength $varname] == 2} {
1443         set options [lindex $varname 1]
1444         set varname [lindex $varname 0]
1445     }
1446
1447     set whatever "\"\[^\"\]+\""
1448
1449     set children_exp_j [mi_child_regexp $children 1]
1450     if {$numchildren} {
1451         set expected "\\^done,numchild=\".*\",children=\\\[$children_exp_j.*\\\]"
1452     } {
1453         set expected "\\^done,numchild=\"0\""
1454     }
1455
1456     if {"$to" == ""} {
1457         append expected ",has_more=\"0\""
1458     } elseif {$to >= 0 && $numchildren > $to} {
1459         append expected ",has_more=\"1\""
1460     } else {
1461         append expected ",has_more=\"0\""
1462     }
1463
1464     verbose -log "Expecting: $expected"
1465
1466     mi_gdb_test "-var-list-children $options $varname $from $to" \
1467       $expected $testname
1468 }
1469
1470 # Verifies that variable object VARNAME has NUMBER children,
1471 # where each one is named $VARNAME.<index-of-child> and has type TYPE.
1472 proc mi_list_array_varobj_children { varname number type testname } {
1473     set t {}
1474     for {set i 0} {$i < $number} {incr i} {
1475         lappend t [list $varname.$i $i 0 $type]
1476     }
1477     mi_list_varobj_children $varname $t $testname
1478 }
1479
1480 # A list of two-element lists.  First element of each list is
1481 # a Tcl statement, and the second element is the line
1482 # number of source C file where the statement originates.
1483 set mi_autotest_data ""
1484 # The name of the source file for autotesting.
1485 set mi_autotest_source ""
1486
1487 proc count_newlines { string } {
1488     return [regexp -all "\n" $string]
1489 }
1490
1491 # Prepares for running inline tests in FILENAME.
1492 # See comments for mi_run_inline_test for detailed
1493 # explanation of the idea and syntax.
1494 proc mi_prepare_inline_tests { filename } {
1495
1496     global srcdir
1497     global subdir
1498     global mi_autotest_source
1499     global mi_autotest_data
1500
1501     set mi_autotest_data {}
1502
1503     set mi_autotest_source $filename
1504
1505     if { ! [regexp "^/" "$filename"] } then {
1506         set filename "$srcdir/$subdir/$filename"
1507     }
1508
1509     set chan [open $filename]
1510     set content [read $chan]
1511     set line_number 1
1512     while {1} {
1513         set start [string first "/*:" $content]
1514         if {$start != -1} {
1515             set end [string first ":*/" $content]
1516             if {$end == -1} {
1517                 error "Unterminated special comment in $filename"
1518             }
1519
1520             set prefix [string range $content 0 $start]
1521             set prefix_newlines [count_newlines $prefix]
1522
1523             set line_number [expr $line_number+$prefix_newlines]
1524             set comment_line $line_number
1525
1526             set comment [string range $content [expr $start+3] [expr $end-1]]
1527
1528             set comment_newlines [count_newlines $comment]
1529             set line_number [expr $line_number+$comment_newlines]
1530
1531             set comment [string trim $comment]
1532             set content [string range $content [expr $end+3] \
1533                              [string length $content]]
1534             lappend mi_autotest_data [list $comment $comment_line]
1535         } else {
1536            break
1537         }
1538     }
1539     close $chan
1540 }
1541
1542 # Helper to mi_run_inline_test below.
1543 # Return the list of all (statement,line_number) lists
1544 # that comprise TESTCASE.  The begin and end markers
1545 # are not included.
1546 proc mi_get_inline_test {testcase} {
1547
1548     global mi_gdb_prompt
1549     global mi_autotest_data
1550     global mi_autotest_source
1551
1552     set result {}
1553
1554     set seen_begin 0
1555     set seen_end 0
1556     foreach l $mi_autotest_data {
1557
1558         set comment [lindex $l 0]
1559
1560         if {$comment == "BEGIN: $testcase"} {
1561             set seen_begin 1
1562         } elseif {$comment == "END: $testcase"} {
1563             set seen_end 1
1564             break
1565         } elseif {$seen_begin==1} {
1566             lappend result $l
1567         }
1568     }
1569
1570     if {$seen_begin == 0} {
1571         error "Autotest $testcase not found"
1572     }
1573
1574     if {$seen_begin == 1 && $seen_end == 0} {
1575         error "Missing end marker for test $testcase"
1576     }
1577
1578     return $result
1579 }
1580
1581 # Sets temporary breakpoint at LOCATION.
1582 proc mi_tbreak {location} {
1583
1584     global mi_gdb_prompt
1585
1586     mi_gdb_test "-break-insert -t $location" \
1587         {\^done,bkpt=.*} \
1588         "run to $location (set breakpoint)"
1589 }
1590
1591 # Send COMMAND that must be a command that resumes
1592 # the inferior (run/continue/next/etc) and consumes
1593 # the "^running" output from it.
1594 proc mi_send_resuming_command_raw {command test} {
1595
1596     global mi_gdb_prompt
1597     global thread_selected_re
1598     global library_loaded_re
1599
1600     send_gdb "$command\n"
1601     gdb_expect {
1602         -re "\\^running\r\n\\*running,thread-id=\"\[^\"\]+\"\r\n($library_loaded_re)*($thread_selected_re)?${mi_gdb_prompt}" {
1603             # Note that lack of 'pass' call here -- this works around limitation
1604             # in DejaGNU xfail mechanism. mi-until.exp has this:
1605             #
1606             #     setup_kfail gdb/2104 "*-*-*"
1607             #     mi_execute_to ...
1608             #
1609             # and mi_execute_to uses mi_send_resuming_command.  If we use 'pass' here,
1610             # it will reset kfail, so when the actual test fails, it will be flagged
1611             # as real failure.
1612             return 0
1613         }
1614         -re "\\^error,msg=\"Displaced stepping is only supported in ARM mode\".*" {
1615             unsupported "$test (Thumb mode)"
1616             return -1
1617         }
1618         -re "\\^error,msg=.*" {
1619             fail "$test (MI error)"
1620             return -1
1621         }
1622         -re ".*${mi_gdb_prompt}" {
1623             fail "$test (failed to resume)"
1624             return -1
1625         }
1626         timeout {
1627             fail "$test"
1628             return -1
1629         }
1630     }
1631 }
1632
1633 proc mi_send_resuming_command {command test} {
1634     mi_send_resuming_command_raw -$command $test
1635 }
1636
1637 # Helper to mi_run_inline_test below.
1638 # Sets a temporary breakpoint at LOCATION and runs
1639 # the program using COMMAND.  When the program is stopped
1640 # returns the line at which it.  Returns -1 if line cannot
1641 # be determined.
1642 # Does not check that the line is the same as requested.
1643 # The caller can check itself if required.
1644 proc mi_continue_to_line {location test} {
1645
1646     mi_tbreak $location
1647     mi_send_resuming_command "exec-continue" "run to $location (exec-continue)"
1648     return [mi_get_stop_line $test]
1649 }
1650
1651 # Wait until gdb prints the current line.
1652 proc mi_get_stop_line {test} {
1653
1654   global mi_gdb_prompt
1655   global async
1656
1657   if {$async} {
1658       set prompt_re ""
1659   } else {
1660       set prompt_re "$mi_gdb_prompt$"
1661   }
1662
1663   gdb_expect {
1664       -re ".*line=\"(\[0-9\]*)\".*\r\n$prompt_re" {
1665           return $expect_out(1,string)
1666       }
1667       -re ".*$mi_gdb_prompt" {
1668           fail "wait for stop ($test)"
1669       }
1670       timeout {
1671           fail "wait for stop ($test)"
1672       }
1673   }
1674 }
1675
1676 # Run a MI test embedded in comments in a C file.
1677 # The C file should contain special comments in the following
1678 # three forms:
1679 #
1680 #    /*: BEGIN: testname :*/
1681 #    /*:  <Tcl statements> :*/
1682 #    /*: END: testname :*/
1683 #
1684 # This procedure find the begin and end marker for the requested
1685 # test. Then, a temporary breakpoint is set at the begin
1686 # marker and the program is run (from start).
1687 #
1688 # After that, for each special comment between the begin and end
1689 # marker, the Tcl statements are executed.  It is assumed that
1690 # for each comment, the immediately preceding line is executable
1691 # C statement.  Then, gdb will be single-stepped until that
1692 # preceding C statement is executed, and after that the
1693 # Tcl statements in the comment will be executed.
1694 #
1695 # For example:
1696 #
1697 #     /*: BEGIN: assignment-test :*/
1698 #     v = 10;
1699 #     /*: <Tcl code to check that 'v' is indeed 10 :*/
1700 #     /*: END: assignment-test :*/
1701 #
1702 # The mi_prepare_inline_tests function should be called before
1703 # calling this function.  A given C file can contain several
1704 # inline tests.  The names of the tests must be unique within one
1705 # C file.
1706 #
1707 proc mi_run_inline_test { testcase } {
1708
1709     global mi_gdb_prompt
1710     global hex
1711     global decimal
1712     global fullname_syntax
1713     global mi_autotest_source
1714
1715     set commands [mi_get_inline_test $testcase]
1716
1717     set first 1
1718     set line_now 1
1719
1720     foreach c $commands {
1721         set statements [lindex $c 0]
1722         set line [lindex $c 1]
1723         set line [expr $line-1]
1724
1725         # We want gdb to be stopped at the expression immediately
1726         # before the comment.  If this is the first comment, the
1727         # program is either not started yet or is in some random place,
1728         # so we run it.  For further comments, we might be already
1729         # standing at the right line. If not continue till the
1730         # right line.
1731
1732         if {$first==1} {
1733             # Start the program afresh.
1734             mi_tbreak "$mi_autotest_source:$line"
1735             mi_run_cmd
1736             set line_now [mi_get_stop_line "$testcase: step to $line"]
1737             set first 0
1738         } elseif {$line_now!=$line} {
1739             set line_now [mi_continue_to_line "$mi_autotest_source:$line" "continue to $line"]
1740         }
1741
1742         if {$line_now!=$line} {
1743             fail "$testcase: go to line $line"
1744         }
1745
1746         # We're not at the statement right above the comment.
1747         # Execute that statement so that the comment can test
1748         # the state after the statement is executed.
1749
1750         # Single-step past the line.
1751         if { [mi_send_resuming_command "exec-next" "$testcase: step over $line"] != 0 } {
1752             return -1
1753         }
1754         set line_now [mi_get_stop_line "$testcase: step over $line"]
1755
1756         # We probably want to use 'uplevel' so that statements
1757         # have direct access to global variables that the
1758         # main 'exp' file has set up.  But it's not yet clear,
1759         # will need more experience to be sure.
1760         eval $statements
1761     }
1762 }
1763
1764 proc get_mi_thread_list {name} {
1765   global expect_out
1766
1767   # MI will return a list of thread ids:
1768   #
1769   # -thread-list-ids
1770   # ^done,thread-ids=[thread-id="1",thread-id="2",...],number-of-threads="N"
1771   # (gdb)
1772   mi_gdb_test "-thread-list-ids" \
1773     {.*\^done,thread-ids={(thread-id="[0-9]+"(,)?)+},current-thread-id="[0-9]+",number-of-threads="[0-9]+"} \
1774     "-thread_list_ids ($name)"
1775
1776   set output {}
1777   if {[info exists expect_out(buffer)]} {
1778     set output $expect_out(buffer)
1779   }
1780
1781   set thread_list {}
1782   if {![regexp {thread-ids=\{(thread-id="[0-9]+"(,)?)*\}} $output threads]} {
1783     fail "finding threads in MI output ($name)"
1784   } else {
1785     pass "finding threads in MI output ($name)"
1786
1787     # Make list of console threads
1788     set start [expr {[string first \{ $threads] + 1}]
1789     set end   [expr {[string first \} $threads] - 1}]
1790     set threads [string range $threads $start $end]
1791     foreach thread [split $threads ,] {
1792       if {[scan $thread {thread-id="%d"} num]} {
1793         lappend thread_list $num
1794       }
1795     }
1796   }
1797
1798   return $thread_list
1799 }
1800
1801 # Check that MI and the console know of the same threads.
1802 # Appends NAME to all test names.
1803 proc check_mi_and_console_threads {name} {
1804   global expect_out
1805
1806   mi_gdb_test "-thread-list-ids" \
1807     {.*\^done,thread-ids={(thread-id="[0-9]+"(,)*)+},current-thread-id="[0-9]+",number-of-threads="[0-9]+"} \
1808     "-thread-list-ids ($name)"
1809   set mi_output {}
1810   if {[info exists expect_out(buffer)]} {
1811     set mi_output $expect_out(buffer)
1812   }
1813
1814   # GDB will return a list of thread ids and some more info:
1815   #
1816   # (gdb)
1817   # -interpreter-exec console "info threads"
1818   # ~"  4 Thread 2051 (LWP 7734)  0x401166b1 in __libc_nanosleep () at __libc_nanosleep:-1"
1819   # ~"  3 Thread 1026 (LWP 7733)   () at __libc_nanosleep:-1"
1820   # ~"  2 Thread 2049 (LWP 7732)  0x401411f8 in __poll (fds=0x804bb24, nfds=1, timeout=2000) at ../sysdeps/unix/sysv/linux/poll.c:63"
1821   # ~"* 1 Thread 1024 (LWP 7731)  main (argc=1, argv=0xbfffdd94) at ../../../src/gdb/testsuite/gdb.mi/pthreads.c:160"
1822   # FIXME: kseitz/2002-09-05: Don't use the hack-cli method.
1823   mi_gdb_test "info threads" \
1824     {.*(~".*"[\r\n]*)+.*} \
1825     "info threads ($name)"
1826   set console_output {}
1827   if {[info exists expect_out(buffer)]} {
1828     set console_output $expect_out(buffer)
1829   }
1830
1831   # Make a list of all known threads to console (gdb's thread IDs)
1832   set console_thread_list {}
1833   foreach line [split $console_output \n] {
1834     if {[string index $line 0] == "~"} {
1835       # This is a line from the console; trim off "~", " ", "*", and "\""
1836       set line [string trim $line ~\ \"\*]
1837       if {[scan $line "%d" id] == 1} {
1838         lappend console_thread_list $id
1839       }
1840     }
1841   }
1842
1843   # Now find the result string from MI
1844   set mi_result ""
1845   foreach line [split $mi_output \n] {
1846     if {[string range $line 0 4] == "^done"} {
1847       set mi_result $line
1848     }
1849   }
1850   if {$mi_result == ""} {
1851     fail "finding MI result string ($name)"
1852   } else {
1853     pass "finding MI result string ($name)"
1854   }
1855
1856   # Finally, extract the thread ids and compare them to the console
1857   set num_mi_threads_str ""
1858   if {![regexp {number-of-threads="[0-9]+"} $mi_result num_mi_threads_str]} {
1859     fail "finding number of threads in MI output ($name)"
1860   } else {
1861     pass "finding number of threads in MI output ($name)"
1862
1863     # Extract the number of threads from the MI result
1864     if {![scan $num_mi_threads_str {number-of-threads="%d"} num_mi_threads]} {
1865       fail "got number of threads from MI ($name)"
1866     } else {
1867       pass "got number of threads from MI ($name)"
1868
1869       # Check if MI and console have same number of threads
1870       if {$num_mi_threads != [llength $console_thread_list]} {
1871         fail "console and MI have same number of threads ($name)"
1872       } else {
1873         pass "console and MI have same number of threads ($name)"
1874
1875         # Get MI thread list
1876         set mi_thread_list [get_mi_thread_list $name]
1877
1878         # Check if MI and console have the same threads
1879         set fails 0
1880         foreach ct [lsort $console_thread_list] mt [lsort $mi_thread_list] {
1881           if {$ct != $mt} {
1882             incr fails
1883           }
1884         }
1885         if {$fails > 0} {
1886           fail "MI and console have same threads ($name)"
1887
1888           # Send a list of failures to the log
1889           send_log "Console has thread ids: $console_thread_list\n"
1890           send_log "MI has thread ids: $mi_thread_list\n"
1891         } else {
1892           pass "MI and console have same threads ($name)"
1893         }
1894       }
1895     }
1896   }
1897 }
1898
1899 # Download shared libraries to the target.
1900 proc mi_load_shlibs { args } {
1901     if {![is_remote target]} {
1902         return
1903     }
1904
1905     foreach file $args {
1906         gdb_download [shlib_target_file $file]
1907     }
1908
1909     # Even if the target supplies full paths for shared libraries,
1910     # they may not be paths for this system.
1911     mi_gdb_test "set solib-search-path [file dirname [lindex $args 0]]" "\^done" ""
1912 }
1913
1914 proc mi_reverse_list { list } {
1915     if { [llength $list] <= 1 } {
1916         return $list
1917     }
1918     set tail [lrange $list 1 [llength $list]]
1919     set rtail [mi_reverse_list $tail]
1920     lappend rtail [lindex $list 0]
1921     return $rtail
1922 }
1923
1924 proc mi_check_thread_states { xstates test } {
1925     global expect_out
1926     set states [mi_reverse_list $xstates]
1927     set pattern ".*\\^done,threads=\\\["
1928     foreach s $states {
1929         set pattern "${pattern}(.*)state=\"$s\""
1930     }
1931     set pattern "${pattern}(,core=\"\[0-9\]*\")?\\\}\\\].*"
1932
1933     verbose -log "expecting: $pattern"
1934     mi_gdb_test "-thread-info" $pattern $test
1935 }
1936
1937 # Return a list of MI features supported by this gdb.
1938 proc mi_get_features {} {
1939     global expect_out mi_gdb_prompt
1940
1941     send_gdb "-list-features\n"
1942
1943     gdb_expect {
1944         -re "\\^done,features=\\\[(.*)\\\]\r\n$mi_gdb_prompt$" {
1945             regsub -all -- \" $expect_out(1,string) "" features
1946             return [split $features ,]
1947         }
1948         -re ".*\r\n$mi_gdb_prompt$" {
1949             verbose -log "got $expect_out(buffer)"
1950             return ""
1951         }
1952         timeout {
1953             verbose -log "timeout in mi_gdb_prompt"
1954             return ""
1955         }
1956     }
1957 }
1958
1959 # Variable Object Trees
1960 #
1961 # Yet another way to check varobjs. Pass mi_walk_varobj_tree a "list" of
1962 # variables (not unlike the actual source code definition), and it will
1963 # automagically test the children for you (by default).
1964 #
1965 # Example:
1966 #
1967 # source code:
1968 # struct bar {
1969 #   union {
1970 #     int integer;
1971 #     void *ptr;
1972 #   };
1973 #   const int *iPtr;
1974 # };
1975 #
1976 # class foo {
1977 # public:
1978 #   int a;
1979 #   struct {
1980 #     int b;
1981 #     struct bar *c;
1982 #   };
1983 # };
1984 #
1985 # foo *f = new foo (); <-- break here
1986 #
1987 # We want to check all the children of "f".
1988 #
1989 # Translate the above structures into the following tree:
1990 #
1991 # set tree {
1992 #   foo f {
1993 #     {} public {
1994 #       int a {}
1995 #       anonymous struct {
1996 #         {} public {
1997 #           int b {}
1998 #           {bar *} c {
1999 #             {} public {
2000 #               anonymous union {
2001 #                 {} public {
2002 #                   int integer {}
2003 #                   {void *} ptr {}
2004 #                 }
2005 #               }
2006 #               {const int *} iPtr {
2007 #                 {const int} {*iPtr} {}
2008 #               }
2009 #             }
2010 #           }
2011 #         }
2012 #       }
2013 #     }
2014 #   }
2015 # }
2016 #
2017 # mi_walk_varobj_tree c++ $tree
2018 #
2019 # If you'd prefer to walk the tree using your own callback,
2020 # simply pass the name of the callback to mi_walk_varobj_tree.
2021 #
2022 # This callback should take one argument, the name of the variable
2023 # to process.  This name is the name of a global array holding the
2024 # variable's properties (object name, type, etc).
2025 #
2026 # An example callback:
2027 #
2028 # proc my_callback {var} {
2029 #   upvar #0 $var varobj
2030 #
2031 #   puts "my_callback: called on varobj $varobj(obj_name)"
2032 # }
2033 #
2034 # The arrays created for each variable object contain the following
2035 # members:
2036 #
2037 # obj_name     - the object name for accessing this variable via MI
2038 # display_name - the display name for this variable (exp="display_name" in
2039 #                the output of -var-list-children)
2040 # type         - the type of this variable (type="type" in the output
2041 #                of -var-list-children, or the special tag "anonymous"
2042 # path_expr    - the "-var-info-path-expression" for this variable
2043 #                NOTE: This member cannot be used reliably with typedefs.
2044 #                Use with caution!
2045 #                See notes inside get_path_expr for more.
2046 # parent       - the variable name of the parent varobj
2047 # children     - a list of children variable names (which are the
2048 #                names Tcl arrays, not object names)
2049 #
2050 # For each variable object, an array containing the above fields will
2051 # be created under the root node (conveniently called, "root").  For example,
2052 # a variable object with handle "OBJ.public.0_anonymous.a" will have
2053 # a corresponding global Tcl variable named "root.OBJ.public.0_anonymous.a".
2054 #
2055 # Note that right now, this mechanism cannot be used for recursive data
2056 # structures like linked lists.
2057
2058 namespace eval ::varobj_tree {
2059   # An index which is appended to root varobjs to ensure uniqueness.
2060   variable _root_idx 0
2061
2062   # A procedure to help with debuggging varobj trees.
2063   # VARIABLE_NAME is the name of the variable to dump.
2064   # CMD, if present, is the name of the callback to output the contstructed
2065   #   strings. By default, it uses expect's "send_log" command.
2066   # TERM, if present, is a terminating character. By default it is the newline.
2067   #
2068   # To output to the terminal (not the expect log), use
2069   # mi_varobj_tree_dump_variable my_variable puts ""
2070
2071   proc mi_varobj_tree_dump_variable {variable_name {cmd send_log} {term "\n"}} {
2072     upvar #0 $variable_name varobj
2073
2074     eval "$cmd \"VAR = $variable_name$term\""
2075
2076     # Explicitly encode the array indices, since outputting them
2077     # in some logical order is better than what "array names" might
2078     # return.
2079     foreach idx {obj_name parent display_name type path_expr} {
2080       eval "$cmd \"\t$idx = $varobj($idx)$term\""
2081     }
2082
2083     # Output children
2084     set num [llength $varobj(children)]
2085     eval "$cmd \"\tnum_children = $num$term\""
2086     if {$num > 0} {
2087       eval "$cmd \"\tchildren = $varobj(children)$term\""
2088     }
2089   }
2090
2091   # The default callback used by mi_walk_varobj_tree.  This callback
2092   # simply checks all of VAR's children.  It specifically does not test
2093   # path expressions, since that is very problematic.
2094   #
2095   # This procedure may be used in custom callbacks.
2096   proc test_children_callback {variable_name} {
2097     upvar #0 $variable_name varobj
2098
2099     if {[llength $varobj(children)] > 0} {
2100       # Construct the list of children the way mi_list_varobj_children
2101       # expects to get it:
2102       # { {obj_name display_name num_children type} ... }
2103       set children_list {}
2104       foreach child $varobj(children) {
2105         upvar #0 $child c
2106         set clist [list [string_to_regexp $c(obj_name)] \
2107                        [string_to_regexp $c(display_name)] \
2108                        [llength $c(children)]]
2109         if {[string length $c(type)] > 0} {
2110           lappend clist [string_to_regexp $c(type)]
2111         }
2112         lappend children_list $clist
2113       }
2114
2115       mi_list_varobj_children $varobj(obj_name) $children_list \
2116           "VT: list children of $varobj(obj_name)"
2117     }
2118   }
2119
2120   # Set the properties of the varobj represented by
2121   # PARENT_VARIABLE - the name of the parent's variable
2122   # OBJNAME         - the MI object name of this variable
2123   # DISP_NAME       - the display name of this variable
2124   # TYPE            - the type of this variable
2125   # PATH            - the path expression for this variable
2126   # CHILDREN        - a list of the variable's children
2127   proc create_varobj {parent_variable objname disp_name \
2128                           type path children} {
2129     upvar #0 $parent_variable parent
2130
2131     set var_name "root.$objname"
2132     global $var_name
2133     array set $var_name [list obj_name $objname]
2134     array set $var_name [list display_name $disp_name]
2135     array set $var_name [list type $type]
2136     array set $var_name [list path_expr $path]
2137     array set $var_name [list parent "$parent_variable"]
2138     array set $var_name [list children \
2139                              [get_tree_children $var_name $children]]
2140     return $var_name
2141   }
2142
2143   # Should VARIABLE be used in path expressions?  The CPLUS_FAKE_CHILD
2144   # varobjs and anonymous structs/unions are not used for path expressions.
2145   proc is_path_expr_parent {variable} {
2146     upvar #0 $variable varobj
2147
2148     # If the varobj's type is "", it is a CPLUS_FAKE_CHILD.
2149     # If the tail of the varobj's object name is "%d_anonymous",
2150     # then it represents an anonymous struct or union.
2151     if {[string length $varobj(type)] == 0 \
2152             || [regexp {[0-9]+_anonymous$} $varobj(obj_name)]} {
2153       return false
2154     }
2155
2156     return true
2157   }
2158
2159   # Return the path expression for the variable named NAME in
2160   # parent varobj whose variable name is given by PARENT_VARIABLE.
2161   proc get_path_expr {parent_variable name type} {
2162     upvar #0 $parent_variable parent
2163     upvar #0 $parent_variable path_parent
2164
2165     # If TYPE is "", this is one of the CPLUS_FAKE_CHILD varobjs,
2166     # which has no path expression.  Likewsise for anonymous structs
2167     # and unions.
2168     if {[string length $type] == 0 \
2169             || [string compare $type "anonymous"] == 0} {
2170       return ""
2171     }
2172
2173     # Find the path parent variable.
2174     while {![is_path_expr_parent $parent_variable]} {
2175       set parent_variable $path_parent(parent)
2176       upvar #0 $parent_variable path_parent
2177     }
2178
2179     # This is where things get difficult.  We do not actually know
2180     # the real type for variables defined via typedefs, so we don't actually
2181     # know whether the parent is a structure/union or not.
2182     #
2183     # So we assume everything that isn't a simple type is a compound type.
2184     set stars ""
2185     regexp {\*+} $parent(type) stars
2186     set is_compound 1
2187     if {[string index $name 0] == "*"} {
2188       set is_compound 0
2189     }
2190
2191     if {[string index $parent(type) end] == "\]"} {
2192       # Parent is an array.
2193       return "($path_parent(path_expr))\[$name\]"
2194     } elseif {$is_compound} {
2195       # Parent is a structure or union or a pointer to one.
2196       if {[string length $stars]} {
2197         set join "->"
2198       } else {
2199         set join "."
2200       }
2201
2202       global root
2203
2204       # To make matters even more hideous, varobj.c has slightly different
2205       # path expressions for C and C++.
2206       set path_expr "($path_parent(path_expr))$join$name"
2207       if {[string compare -nocase $root(language) "c"] == 0} {
2208         return $path_expr
2209       } else {
2210         return "($path_expr)"
2211       }
2212     } else {
2213       # Parent is a pointer.
2214       return "*($path_parent(path_expr))"
2215     }
2216   }
2217
2218   # Process the CHILDREN (a list of varobj_tree elements) of the variable
2219   # given by PARENT_VARIABLE.  Returns a list of children variables.
2220   proc get_tree_children {parent_variable children} {
2221     upvar #0 $parent_variable parent
2222
2223     set field_idx 0
2224     set children_list {}
2225     foreach {type name children} $children {
2226       if {[string compare $parent_variable "root"] == 0} {
2227         # Root variable
2228         variable _root_idx
2229         incr _root_idx
2230         set objname "$name$_root_idx"
2231         set disp_name "$name"
2232         set path_expr "$name"
2233       } elseif {[string compare $type "anonymous"] == 0} {
2234         # Special case: anonymous types.  In this case, NAME will either be
2235         # "struct" or "union".
2236         set objname "$parent(obj_name).${field_idx}_anonymous"
2237         set disp_name "<anonymous $name>"
2238         set path_expr ""
2239         set type "$name {...}"
2240       } else {
2241         set objname "$parent(obj_name).$name"
2242         set disp_name $name
2243         set path_expr [get_path_expr $parent_variable $name $type]
2244       }
2245
2246       lappend children_list [create_varobj $parent_variable $objname \
2247                                  $disp_name $type $path_expr $children]
2248       incr field_idx
2249     }
2250
2251     return $children_list
2252   }
2253
2254   # The main procedure to call the given CALLBACK on the elements of the
2255   # given varobj TREE.  See detailed explanation above.
2256   proc walk_tree {language tree callback} {
2257     global root
2258
2259     if {[llength $tree] < 3} {
2260       error "tree does not contain enough elements"
2261     }
2262
2263     # Create root node and process the tree.
2264     array set root [list language $language]
2265     array set root [list obj_name "root"]
2266     array set root [list display_name "root"]
2267     array set root [list type "root"]
2268     array set root [list path_expr "root"]
2269     array set root [list parent "root"]
2270     array set root [list children [get_tree_children root $tree]]
2271
2272     # Walk the tree
2273     set all_nodes $root(children); # a stack of nodes
2274     while {[llength $all_nodes] > 0} {
2275       # "Pop" the name of the global variable containing this varobj's
2276       # information from the stack of nodes.
2277       set var_name [lindex $all_nodes 0]
2278       set all_nodes [lreplace $all_nodes 0 0]
2279
2280       # Bring the global named in VAR_NAME into scope as the local variable
2281       # VAROBJ.
2282       upvar #0 $var_name varobj
2283
2284       # Append any children of VAROBJ to the list of nodes to walk.
2285       if {[llength $varobj(children)] > 0} {
2286         set all_nodes [concat $all_nodes $varobj(children)]
2287       }
2288
2289       # If this is a root variable, create the variable object for it.
2290       if {[string compare $varobj(parent) "root"] == 0} {
2291         mi_create_varobj $varobj(obj_name) $varobj(display_name) \
2292             "VT: create root varobj for $varobj(display_name)"
2293       }
2294
2295       # Now call the callback for VAROBJ.
2296       uplevel #0 $callback $var_name
2297     }
2298   }
2299 }
2300
2301 # The default varobj tree callback, which simply tests -var-list-children.
2302 proc mi_varobj_tree_test_children_callback {variable} {
2303   ::varobj_tree::test_children_callback $variable
2304 }
2305
2306 # Walk the variable object tree given by TREE, calling the specified
2307 # CALLBACK.  By default this uses mi_varobj_tree_test_children_callback.
2308 proc mi_walk_varobj_tree {language tree \
2309                               {callback \
2310                                    mi_varobj_tree_test_children_callback}} {
2311   ::varobj_tree::walk_tree $language $tree $callback
2312 }