path: root/gdb/testsuite/lib/mi-support.exp

# Copyright 1999, 2000, 2002, 2003, 2004, 2005, 2007, 2008
# Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

# Please email any bugs, comments, and/or additions to this file to:
# bug-gdb@prep.ai.mit.edu

# This file was based on a file written by Fred Fish. (fnf@cygnus.com)

# Test setup routines that work with the MI interpreter.

# The variable mi_gdb_prompt is a regexp which matches the gdb mi prompt.
# Set it if it is not already set.
global mi_gdb_prompt
if ![info exists mi_gdb_prompt] then {
    set mi_gdb_prompt "\[(\]gdb\[)\] \r\n"
}

global mi_inferior_spawn_id
global mi_inferior_tty_name

set MIFLAGS "-i=mi"

#
# mi_gdb_exit -- exit the GDB, killing the target program if necessary
#
proc mi_gdb_exit {} {
    catch mi_uncatched_gdb_exit
}

proc mi_uncatched_gdb_exit {} {
    global GDB
    global GDBFLAGS
    global verbose
    global gdb_spawn_id;
    global gdb_prompt
    global mi_gdb_prompt
    global MIFLAGS

    gdb_stop_suppressing_tests;

    if { [info procs sid_exit] != "" } {
	sid_exit
    }

    if ![info exists gdb_spawn_id] {
	return;
    }

    verbose "Quitting $GDB $GDBFLAGS $MIFLAGS"

    if { [is_remote host] && [board_info host exists fileid] } {
	send_gdb "999-gdb-exit\n";
	gdb_expect 10 {
	    -re "y or n" {
		send_gdb "y\n";
		exp_continue;
	    }
            -re "Undefined command.*$gdb_prompt $" {
                send_gdb "quit\n"
		exp_continue;
            }
	    -re "DOSEXIT code" { }
	    default { }
	}
    }

    if ![is_remote host] {
	remote_close host;
    }
    unset gdb_spawn_id
}

#
# mi_gdb_start [INFERIOR_PTY] -- start gdb running, default procedure
#
# INFERIOR_PTY should be set to separate-inferior-tty to have the inferior work 
# with it's own PTY. If set to same-inferior-tty, the inferior shares GDB's PTY. 
# The default value is same-inferior-tty.
#
# When running over NFS, particularly if running many simultaneous
# tests on different hosts all using the same server, things can
# get really slow.  Give gdb at least 3 minutes to start up.
#
proc mi_gdb_start { args } {
    global verbose
    global GDB
    global GDBFLAGS
    global gdb_prompt
    global mi_gdb_prompt
    global timeout
    global gdb_spawn_id;
    global MIFLAGS

    gdb_stop_suppressing_tests;
    set inferior_pty no-tty

    if { [llength $args] == 1} {
	set inferior_pty [lindex $args 0]
    }

    set separate_inferior_pty [string match $inferior_pty separate-inferior-tty]

    # Start SID.
    if { [info procs sid_start] != "" } {
	verbose "Spawning SID"
	sid_start
    }

    verbose "Spawning $GDB -nw $GDBFLAGS $MIFLAGS"

    if [info exists gdb_spawn_id] {
	return 0;
    }

    if ![is_remote host] {
	if { [which $GDB] == 0 } then {
	    perror "$GDB does not exist."
	    exit 1
	}
    }

    # Create the new PTY for the inferior process.
    if { $separate_inferior_pty } {
	spawn -pty
	global mi_inferior_spawn_id
	global mi_inferior_tty_name
	set mi_inferior_spawn_id $spawn_id
	set mi_inferior_tty_name $spawn_out(slave,name)
    }

    set res [remote_spawn host "$GDB -nw $GDBFLAGS $MIFLAGS [host_info gdb_opts]"];
    if { $res < 0 || $res == "" } {
	perror "Spawning $GDB failed."
	return 1;
    }
    gdb_expect {
	-re "~\"GNU.*\r\n~\".*$mi_gdb_prompt$" {
	    # We have a new format mi startup prompt.  If we are
	    # running mi1, then this is an error as we should be
	    # using the old-style prompt.
	    if { $MIFLAGS == "-i=mi1" } {
	        perror "(mi startup) Got unexpected new mi prompt."
	        remote_close host;
	        return -1;
	    }
	    verbose "GDB initialized."
	}
	-re "\[^~\].*$mi_gdb_prompt$" {
	    # We have an old format mi startup prompt.  If we are
	    # not running mi1, then this is an error as we should be
	    # using the new-style prompt.
	    if { $MIFLAGS != "-i=mi1" } {
	        perror "(mi startup) Got unexpected old mi prompt."
	        remote_close host;
	        return -1;
	    }
	    verbose "GDB initialized."
	}
	-re ".*$gdb_prompt $" {
	    untested "Skip mi tests (got non-mi prompt)."
	    remote_close host;
	    return -1;
	}
	-re ".*unrecognized option.*for a complete list of options." {
	    untested "Skip mi tests (not compiled with mi support)."
	    remote_close host;
	    return -1;
	}
	-re ".*Interpreter `mi' unrecognized." {
	    untested "Skip mi tests (not compiled with mi support)."
	    remote_close host;
	    return -1;
	}
	timeout {
	    perror "(timeout) GDB never initialized after 10 seconds."
	    remote_close host;
	    return -1
	}
    }
    set gdb_spawn_id -1;

    # FIXME: mi output does not go through pagers, so these can be removed.
    # force the height to "unlimited", so no pagers get used
    send_gdb "100-gdb-set height 0\n"
    gdb_expect 10 {
	-re ".*100-gdb-set height 0\r\n100\\\^done\r\n$mi_gdb_prompt$" { 
	    verbose "Setting height to 0." 2
	}
	timeout {
	    warning "Couldn't set the height to 0"
	}
    }
    # force the width to "unlimited", so no wraparound occurs
    send_gdb "101-gdb-set width 0\n"
    gdb_expect 10 {
	-re ".*101-gdb-set width 0\r\n101\\\^done\r\n$mi_gdb_prompt$" {
	    verbose "Setting width to 0." 2
	}
	timeout {
	    warning "Couldn't set the width to 0."
	}
    }
    # If allowing the inferior to have its own PTY then assign the inferior
    # its own terminal device here.
    if { $separate_inferior_pty } {
	send_gdb "102-inferior-tty-set $mi_inferior_tty_name\n"
	gdb_expect 10 {
	    -re ".*102\\\^done\r\n$mi_gdb_prompt$" {
		verbose "redirect inferior output to new terminal device."
	    }
	    timeout {
	    	warning "Couldn't redirect inferior output." 2
	    }
    	}
    }

    return 0;
}

# Many of the tests depend on setting breakpoints at various places and
# running until that breakpoint is reached.  At times, we want to start
# with a clean-slate with respect to breakpoints, so this utility proc 
# lets us do this without duplicating this code everywhere.
#

proc mi_delete_breakpoints {} {
    global mi_gdb_prompt

# FIXME: The mi operation won't accept a prompt back and will use the 'all' arg
    send_gdb "102-break-delete\n"
    gdb_expect 30 {
	 -re "Delete all breakpoints.*y or n.*$" {
	    send_gdb "y\n";
	    exp_continue
         }
	 -re "102-break-delete\r\n102\\\^done\r\n$mi_gdb_prompt$" {
            # This happens if there were no breakpoints
	 }
	 timeout { perror "Delete all breakpoints in mi_delete_breakpoints (timeout)" ; return }
    }

# The correct output is not "No breakpoints or watchpoints." but an
# empty BreakpointTable. Also, a query is not acceptable with mi.
    send_gdb "103-break-list\n"
    gdb_expect 30 {
	 -re "103-break-list\r\n103\\\^done,BreakpointTable=\{\}\r\n$mi_gdb_prompt$" {}
	 -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=\\\[\\\]\}" {}
	 -re "103-break-list\r\n103\\\^doneNo breakpoints or watchpoints.\r\n\r\n$mi_gdb_prompt$" {warning "Unexpected console text received"}
	 -re "$mi_gdb_prompt$" { perror "Breakpoints not deleted" ; return }
	 -re "Delete all breakpoints.*or n.*$" {
	    warning "Unexpected prompt for breakpoints deletion";
	    send_gdb "y\n";
	    exp_continue
	}
	 timeout { perror "-break-list (timeout)" ; return }
    }
}

proc mi_gdb_reinitialize_dir { subdir } {
    global mi_gdb_prompt
    global MIFLAGS

    global suppress_flag
    if { $suppress_flag } {
	return
    }

    if [is_remote host] {
	return "";
    }

    if { $MIFLAGS == "-i=mi1" } {
      send_gdb "104-environment-directory\n"
      gdb_expect 60 {
	-re ".*Reinitialize source path to empty.*y or n. " {
            warning "Got confirmation prompt for dir reinitialization."
	    send_gdb "y\n"
	    gdb_expect 60 {
		-re "$mi_gdb_prompt$" {}
                timeout {error "Dir reinitialization failed (timeout)"}
	    }
	}
	-re "$mi_gdb_prompt$" {}
        timeout {error "Dir reinitialization failed (timeout)"}
      }
    } else {
      send_gdb "104-environment-directory -r\n"
      gdb_expect 60 {
	-re "104\\\^done,source-path=.*\r\n$mi_gdb_prompt$" {}
	-re "$mi_gdb_prompt$" {}
        timeout {error "Dir reinitialization failed (timeout)"}
      }
    }

    send_gdb "105-environment-directory $subdir\n"
    gdb_expect 60 {
	-re "Source directories searched.*$mi_gdb_prompt$" {
	    verbose "Dir set to $subdir"
	}
	-re "105\\\^done.*\r\n$mi_gdb_prompt$" {
            # FIXME: We return just the prompt for now.
	    verbose "Dir set to $subdir"
	    # perror "Dir \"$subdir\" failed."
	}
    }
}

# Send GDB the "target" command.
# FIXME: Some of these patterns are not appropriate for MI.  Based on
# config/monitor.exp:gdb_target_command.
proc mi_gdb_target_cmd { targetname serialport } {
    global mi_gdb_prompt

    set serialport_re [string_to_regexp $serialport]
    for {set i 1} {$i <= 3} {incr i} {
	send_gdb "47-target-select $targetname $serialport\n"
	gdb_expect 60 {
	    -re "47\\^connected.*$mi_gdb_prompt$" {
		verbose "Set target to $targetname";
		return 0;
	    }
	    -re "unknown host.*$mi_gdb_prompt" {
	        verbose "Couldn't look up $serialport"
	    }
	    -re "Couldn't establish connection to remote.*$mi_gdb_prompt$" {
		verbose "Connection failed";
	    }
	    -re "Remote MIPS debugging.*$mi_gdb_prompt$" {
		verbose "Set target to $targetname";
		return 0;
	    }
	    -re "Remote debugging using .*$serialport_re.*$mi_gdb_prompt$" {
		verbose "Set target to $targetname";
		return 0;
	    }
	    -re "Remote target $targetname connected to.*$mi_gdb_prompt$" {
		verbose "Set target to $targetname";
		return 0;
	    }
	    -re "Connected to.*$mi_gdb_prompt$" { 
		verbose "Set target to $targetname";
		return 0;
	    }
	    -re "Ending remote.*$mi_gdb_prompt$" { }
	    -re "Connection refused.*$mi_gdb_prompt$" {
		verbose "Connection refused by remote target.  Pausing, and trying again."
		sleep 5
		continue
	    }
	    -re "Timeout reading from remote system.*$mi_gdb_prompt$" {
		verbose "Got timeout error from gdb.";
	    }
	    timeout {
		send_gdb "";
		break
	    }
	}
    }
    return 1
}

#
# load a file into the debugger (file command only).
# return a -1 if anything goes wrong.
#
proc mi_gdb_file_cmd { arg } {
    global verbose
    global loadpath
    global loadfile
    global GDB
    global mi_gdb_prompt
    global last_loaded_file
    upvar timeout timeout

    set last_loaded_file $arg

    if [is_remote host] {
	set arg [remote_download host $arg];
	if { $arg == "" } {
	    error "download failed"
	    return -1;
	}
    }

# FIXME: Several of these patterns are only acceptable for console
# output.  Queries are an error for mi.
    send_gdb "105-file-exec-and-symbols $arg\n"
    gdb_expect 120 {
        -re "Reading symbols from.*done.*$mi_gdb_prompt$" {
            verbose "\t\tLoaded $arg into the $GDB"
            return 0
        }
        -re "has no symbol-table.*$mi_gdb_prompt$" {
            perror "$arg wasn't compiled with \"-g\""
            return -1
        }
        -re "Load new symbol table from \".*\".*y or n. $" {
            send_gdb "y\n"
            gdb_expect 120 {
                -re "Reading symbols from.*done.*$mi_gdb_prompt$" {
                    verbose "\t\tLoaded $arg with new symbol table into $GDB"
                    # All OK
                }
                timeout {
                    perror "(timeout) Couldn't load $arg, other program already loaded."
                    return -1
                }
            }
	}
        -re "No such file or directory.*$mi_gdb_prompt$" {
            perror "($arg) No such file or directory\n"
            return -1
        }
        -re "105-file-exec-and-symbols .*\r\n105\\\^done\r\n$mi_gdb_prompt$" {
            # We (MI) are just giving the prompt back for now, instead of giving
	    # some acknowledgement.
	    return 0
	}
        timeout {
            perror "couldn't load $arg into $GDB (timed out)."
            return -1
        }
	eof {
            # This is an attempt to detect a core dump, but seems not to
            # work.  Perhaps we need to match .* followed by eof, in which
            # gdb_expect does not seem to have a way to do that.
            perror "couldn't load $arg into $GDB (end of file)."
            return -1
        }
    }
}

#
# connect to the target and download a file, if necessary.
# return a -1 if anything goes wrong.
#
proc mi_gdb_target_load { } {
    global verbose
    global loadpath
    global loadfile
    global GDB
    global mi_gdb_prompt
    upvar timeout timeout

    if { [info procs gdbserver_gdb_load] != "" } {
	mi_gdb_test "kill" ".*" ""
	set res [gdbserver_gdb_load]
	set protocol [lindex $res 0]
	set gdbport [lindex $res 1]

	if { [mi_gdb_target_cmd $protocol $gdbport] != 0 } {
	    return -1
	}
    } elseif { [info procs send_target_sid] != "" } {
	# For SID, things get complex
	send_gdb "kill\n"
	gdb_expect 10 {
	    -re ".*$mi_gdb_prompt$"
	}
	send_target_sid
	gdb_expect 60 {
	    -re "\\^done.*$mi_gdb_prompt$" {
	    }
	    timeout {
		perror "Unable to connect to SID target"
		return -1
	    }
	}
	send_gdb "48-target-download\n"
	gdb_expect 10 {
	    -re "48\\^done.*$mi_gdb_prompt$" {
	    }
	    timeout {
		perror "Unable to download to SID target"
		return -1
	    }
	}
    } elseif { [target_info protocol] == "sim" } {
	# For the simulator, just connect to it directly.
	send_gdb "47-target-select sim\n"
	gdb_expect 10 {
	    -re "47\\^connected.*$mi_gdb_prompt$" {
	    }
	    timeout {
		perror "Unable to select sim target"
		return -1
	    }
	}
	send_gdb "48-target-download\n"
	gdb_expect 10 {
	    -re "48\\^done.*$mi_gdb_prompt$" {
	    }
	    timeout {
		perror "Unable to download to sim target"
		return -1
	    }
	}
    } elseif { [target_info gdb_protocol] == "remote" } {
	# remote targets
	if { [mi_gdb_target_cmd "remote" [target_info netport]] != 0 } {
	    perror "Unable to connect to remote target"
	    return -1
	}
	send_gdb "48-target-download\n"
	gdb_expect 10 {
	    -re "48\\^done.*$mi_gdb_prompt$" {
	    }
	    timeout {
		perror "Unable to download to remote target"
		return -1
	    }
	}
    }
    return 0
}

#
# load a file into the debugger.
# return a -1 if anything goes wrong.
#
proc mi_gdb_load { arg } {
    if { $arg != "" } {
	return [mi_gdb_file_cmd $arg]
    }
    return 0
}

# mi_gdb_test COMMAND PATTERN MESSAGE [IPATTERN] -- send a command to gdb; 
#   test the result.
#
# COMMAND is the command to execute, send to GDB with send_gdb.  If
#   this is the null string no command is sent.
# PATTERN is the pattern to match for a PASS, and must NOT include
#   the \r\n sequence immediately before the gdb prompt.
# MESSAGE is the message to be printed.  (If this is the empty string, 
#   then sometimes we don't call pass or fail at all; I don't 
#   understand this at all.)
# IPATTERN is the pattern to match for the inferior's output.  This parameter
#   is optional.  If present, it will produce a PASS if the match is 
#   successful, and a FAIL if unsuccessful.
#
# Returns:
#    1 if the test failed,
#    0 if the test passes,
#   -1 if there was an internal error.
#  
proc mi_gdb_test { args } {
    global verbose
    global mi_gdb_prompt
    global GDB expect_out
    upvar timeout timeout

    set command [lindex $args 0]
    set pattern [lindex $args 1]
    set message [lindex $args 2]

    if [llength $args]==4 {
	set ipattern [lindex $args 3]
    }

    if [llength $args]==5 {
	set question_string [lindex $args 3];
	set response_string [lindex $args 4];
    } else {
	set question_string "^FOOBAR$"
    }

    if $verbose>2 then {
	send_user "Sending \"$command\" to gdb\n"
	send_user "Looking to match \"$pattern\"\n"
	send_user "Message is \"$message\"\n"
    }

    set result -1
    set string "${command}\n";
    set string_regex [string_to_regexp $command]

    if { $command != "" } {
	while { "$string" != "" } {
	    set foo [string first "\n" "$string"];
	    set len [string length "$string"];
	    if { $foo < [expr $len - 1] } {
		set str [string range "$string" 0 $foo];
		if { [send_gdb "$str"] != "" } {
		    global suppress_flag;

		    if { ! $suppress_flag } {
			perror "Couldn't send $command to GDB.";
		    }
		    fail "$message";
		    return $result;
		}
		gdb_expect 2 {
		    -re "\[\r\n\]" { }
		    timeout { }
		}
		set string [string range "$string" [expr $foo + 1] end];
	    } else {
		break;
	    }
	}
	if { "$string" != "" } {
	    if { [send_gdb "$string"] != "" } {
		global suppress_flag;

		if { ! $suppress_flag } {
		    perror "Couldn't send $command to GDB.";
		}
		fail "$message";
		return $result;
	    }
	}
    }

    if [info exists timeout] {
	set tmt $timeout;
    } else {
	global timeout;
	if [info exists timeout] {
	    set tmt $timeout;
	} else {
	    set tmt 60;
	}
    }
    gdb_expect $tmt {
	 -re "\\*\\*\\* DOSEXIT code.*" {
	     if { $message != "" } {
		 fail "$message";
	     }
	     gdb_suppress_entire_file "GDB died";
	     return -1;
	 }
	 -re "Ending remote debugging.*$mi_gdb_prompt\[ \]*$" {
	    if ![isnative] then {
		warning "Can`t communicate to remote target."
	    }
	    gdb_exit
	    gdb_start
	    set result -1
	}
	 -re "^($string_regex\[\r\n\]+)?($pattern\[\r\n\]+$mi_gdb_prompt\[ \]*)" {
	    # At this point, $expect_out(1,string) is the MI input command.
	    # and $expect_out(2,string) is the MI output command.
	    # If $expect_out(1,string) is "", then there was no MI input command here.

	    # NOTE, there is no trailing anchor because with GDB/MI, 
	    # asynchronous responses can happen at any point, causing more 
	    # data to be available.  Normally an anchor is used to make 
	    # sure the end of the output is matched, however, $mi_gdb_prompt 
	    # is just as good of an anchor since mi_gdb_test is meant to 
	    # match a single mi output command.  If a second GDB/MI output 
	    # response is sent, it will be in the buffer for the next 
	    # time mi_gdb_test is called.
	    if ![string match "" $message] then {
		pass "$message"
	    }
	    set result 0
	}
	 -re "(${question_string})$" {
	    send_gdb "$response_string\n";
	    exp_continue;
	}
	 -re "Undefined.* command:.*$mi_gdb_prompt\[ \]*$" {
	    perror "Undefined command \"$command\"."
            fail "$message"
	    set result 1
	}
	 -re "Ambiguous command.*$mi_gdb_prompt\[ \]*$" {
	    perror "\"$command\" is not a unique command name."
            fail "$message"
	    set result 1
	}
	 -re "Program exited with code \[0-9\]+.*$mi_gdb_prompt\[ \]*$" {
	    if ![string match "" $message] then {
		set errmsg "$message (the program exited)"
	    } else {
		set errmsg "$command (the program exited)"
	    }
	    fail "$errmsg"
	    return -1
	}
	 -re "The program is not being run.*$mi_gdb_prompt\[ \]*$" {
	    if ![string match "" $message] then {
		set errmsg "$message (the program is no longer running)"
	    } else {
		set errmsg "$command (the program is no longer running)"
	    }
	    fail "$errmsg"
	    return -1
	}
	 -re ".*$mi_gdb_prompt\[ \]*$" {
	    if ![string match "" $message] then {
		fail "$message"
	    }
	    set result 1
	}
	 "<return>" {
	    send_gdb "\n"
	    perror "Window too small."
            fail "$message"
	}
	 -re "\\(y or n\\) " {
	    send_gdb "n\n"
	    perror "Got interactive prompt."
            fail "$message"
	}
	 eof {
	     perror "Process no longer exists"
	     if { $message != "" } {
		 fail "$message"
	     }
	     return -1
	}
	 full_buffer {
	    perror "internal buffer is full."
            fail "$message"
	}
	timeout	{
	    if ![string match "" $message] then {
		fail "$message (timeout)"
	    }
	    set result 1
	}
    }

    # If the GDB output matched, compare the inferior output.
    if { $result == 0 } {
	if [ info exists ipattern ] {
	    if { ![target_info exists gdb,noinferiorio] } {
		global mi_inferior_spawn_id
		expect {
		    -i $mi_inferior_spawn_id -re "$ipattern" {
			pass "$message inferior output"
		    }
		    timeout {
			fail "$message inferior output (timeout)"
			set result 1
		    }
		}
	    } else {
		unsupported "$message inferior output"
	    }
        }
    }

    return $result
}

#
# MI run command.  (A modified version of gdb_run_cmd)
#

# In patterns, the newline sequence ``\r\n'' is matched explicitly as
# ``.*$'' could swallow up output that we attempt to match elsewhere.

proc mi_run_cmd {args} {
    global suppress_flag
    if { $suppress_flag } {
	return -1
    }
    global mi_gdb_prompt

    if [target_info exists gdb_init_command] {
	send_gdb "[target_info gdb_init_command]\n";
	gdb_expect 30 {
	    -re "$mi_gdb_prompt$" { }
	    default {
		perror "gdb_init_command for target failed";
		return;
	    }
	}
    }

    if { [mi_gdb_target_load] < 0 } {
	return
    }

    if [target_info exists use_gdb_stub] {
	if [target_info exists gdb,do_reload_on_run] {
	    send_gdb "000-exec-continue\n";
	    gdb_expect 60 {
		-re "000\\^running\[\r\n\]+$mi_gdb_prompt$" {}
		default {}
	    }
	    return;
	}

	if [target_info exists gdb,start_symbol] {
	    set start [target_info gdb,start_symbol];
	} else {
	    set start "start";
	}

	# HACK: Should either use 000-jump or fix the target code
	# to better handle RUN.
	send_gdb  "jump *$start\n"
	warning "Using CLI jump command, expect run-to-main FAIL"
	return
    }

    send_gdb "000-exec-run $args\n"
    gdb_expect {
	-re "000\\^running\r\n${mi_gdb_prompt}" {
	}
	timeout {
	    perror "Unable to start target"
	    return
	}
    }
    # NOTE: Shortly after this there will be a ``000*stopped,...(gdb)''
}

#
# Just like run-to-main but works with the MI interface
#

proc mi_run_to_main { } {
    global suppress_flag
    if { $suppress_flag } {
	return -1
    }

    global srcdir
    global subdir
    global binfile
    global srcfile

    mi_delete_breakpoints
    mi_gdb_reinitialize_dir $srcdir/$subdir
    mi_gdb_load ${binfile}

    mi_runto main
}


# Just like gdb's "runto" proc, it will run the target to a given
# function.  The big difference here between mi_runto and mi_execute_to
# is that mi_execute_to must have the inferior running already.  This
# proc will (like gdb's runto) (re)start the inferior, too.
#
# FUNC is the linespec of the place to stop (it inserts a breakpoint here).
# It returns:
#   -1  if test suppressed, failed, timedout
#    0  if test passed

proc mi_runto_helper {func run_or_continue} {
  global suppress_flag
  if { $suppress_flag } {
    return -1
  }

  global mi_gdb_prompt expect_out
  global hex decimal fullname_syntax

  set test "mi runto $func"
  mi_gdb_test "200-break-insert -t $func" \
    "200\\^done,bkpt=\{number=\"\[0-9\]+\",type=\"breakpoint\",disp=\"del\",enabled=\"y\",addr=\"$hex\",func=\"$func\(\\\(.*\\\)\)?\",file=\".*\",line=\"\[0-9\]*\",times=\"0\"\}" \
    "breakpoint at $func"

  if {![regexp {number="[0-9]+"} $expect_out(buffer) str]
      || ![scan $str {number="%d"} bkptno]} {
    set bkptno {[0-9]+}
  }

  if {$run_or_continue == "run"} {
      mi_run_cmd
  } else {
      send_gdb "000-exec-continue\n"
      gdb_expect {
	  -re "000\\^running\r\n${mi_gdb_prompt}" {
	  }
	  timeout {
	    fail "$test"
	    return -1
	  }
      }
  }

  gdb_expect {
    -re ".*000\\*stopped,thread-id=\"$decimal\",frame=\{addr=\"$hex\",func=\"$func\",args=\(\\\[.*\\\]\|\{.*\}\),file=\".*\",fullname=\"${fullname_syntax}.*\",line=\"\[0-9\]*\"\}\r\n$mi_gdb_prompt$" {
      pass "$test"
      return 0
    }
    -re ".*$mi_gdb_prompt$" {
      fail "$test (2)"
    }
    timeout {
      fail "$test (timeout)"
      return -1
    }
  }
}

proc mi_runto {func} {
    mi_runto_helper $func "run"
}

# Next to the next statement
# For return values, see mi_execute_to_helper

proc mi_next { test } {
  return [mi_next_to {.*} {.*} {.*} {.*} $test]
}


# Step to the next statement
# For return values, see mi_execute_to_helper

proc mi_step { test } {
  return [mi_step_to {.*} {.*} {.*} {.*} $test]
}

# cmd should not include the number or newline (i.e. "exec-step 3", not
# "220-exec-step 3\n"

# Can not match -re ".*\r\n${mi_gdb_prompt}", because of false positives
# after the first prompt is printed.

proc mi_execute_to_helper { cmd reason func args file line extra test } {
    global suppress_flag
    if { $suppress_flag } {
	return -1
    }
    global mi_gdb_prompt
    global hex
    global decimal
    global fullname_syntax
    send_gdb "220-$cmd\n"
    gdb_expect {
	-re "220\\^running\r\n${mi_gdb_prompt}.*220\\*stopped,reason=\"$reason\",thread-id=\"$decimal\",frame=\{addr=\"$hex\",func=\"$func\",args=$args,file=\".*$file\",fullname=\"${fullname_syntax}$file\",line=\"$line\"\}$extra\r\n$mi_gdb_prompt$" {
	    pass "$test"
	    return 0
	}
	-re "220\\^running\r\n${mi_gdb_prompt}.*220\\*stopped,reason=\"$reason\",thread-id=\"$decimal\",frame=\{addr=\"$hex\",func=\".*\",args=\[\\\[\{\].*\[\\\]\}\],file=\".*\",fullname=\"${fullname_syntax}.*\",line=\"\[0-9\]*\"\}.*\r\n$mi_gdb_prompt$" {
	    fail "$test (stopped at wrong place)"
	    return -1
	}
	-re "220\\^running\r\n${mi_gdb_prompt}.*\r\n${mi_gdb_prompt}$" {
	    fail "$test (unknown output after running)"
	    return -1
	}
	timeout {
	    fail "$test (timeout)"
	    return -1
	}
    }
}

proc mi_execute_to { cmd reason func args file line extra test } {
    mi_execute_to_helper "$cmd" "$reason" "$func" "\\\[$args\\\]" \
	"$file" "$line" "$extra" "$test"
}

proc mi_next_to { func args file line test } {
    mi_execute_to "exec-next" "end-stepping-range" "$func" "$args" \
	"$file" "$line" "" "$test"
}

proc mi_step_to { func args file line test } {
    mi_execute_to "exec-step" "end-stepping-range" "$func" "$args" \
	"$file" "$line" "" "$test"
}

proc mi_finish_to { func args file line result ret test } {
    mi_execute_to "exec-finish" "function-finished" "$func" "$args" \
	"$file" "$line" \
	",gdb-result-var=\"$result\",return-value=\"$ret\"" \
	"$test"
}

proc mi_continue_to {func} {
    mi_runto_helper $func "continue"
}

proc mi0_execute_to { cmd reason func args file line extra test } {
    mi_execute_to_helper "$cmd" "$reason" "$func" "\{$args\}" \
	"$file" "$line" "$extra" "$test"
}

proc mi0_next_to { func args file line test } {
    mi0_execute_to "exec-next" "end-stepping-range" "$func" "$args" \
	"$file" "$line" "" "$test"
}

proc mi0_step_to { func args file line test } {
    mi0_execute_to "exec-step" "end-stepping-range" "$func" "$args" \
	"$file" "$line" "" "$test"
}

proc mi0_finish_to { func args file line result ret test } {
    mi0_execute_to "exec-finish" "function-finished" "$func" "$args" \
	"$file" "$line" \
	",gdb-result-var=\"$result\",return-value=\"$ret\"" \
	"$test"
}

proc mi0_continue_to { bkptno func args file line test } {
    mi0_execute_to "exec-continue" "breakpoint-hit\",bkptno=\"$bkptno" \
	"$func" "$args" "$file" "$line" "" "$test"
}

# Creates varobj named NAME for EXPRESSION.
# Name cannot be "-".
proc mi_create_varobj { name expression testname } {
    mi_gdb_test "-var-create $name * $expression" \
        "\\^done,name=\"$name\",numchild=\"\[0-9\]+\",value=\".*\",type=.*" \
        $testname
}

# Deletes the specified NAME. 
proc mi_delete_varobj { name testname } {
    mi_gdb_test "-var-delete $name" \
        "\\^done,ndeleted=.*" \
        $testname
}

# Updates varobj named NAME and checks that all varobjs in EXPECTED
# are reported as updated, and no other varobj is updated.
# Assumes that no varobj is out of scope and that no varobj changes
# types.
proc mi_varobj_update { name expected testname } {
    set er "\\^done,changelist=\\\["
    set first 1
    foreach item $expected {
        set v "{name=\"$item\",in_scope=\"true\",type_changed=\"false\"}"
        if {$first == 1} {
            set er "$er$v"
            set first 0
        } else {
            set er "$er,$v"
        }
    }
    set er "$er\\\]"

    verbose -log "Expecting: $er" 2
    mi_gdb_test "-var-update $name" $er $testname
}

proc mi_check_varobj_value { name value testname } {

    mi_gdb_test "-var-evaluate-expression $name" \
	"\\^done,value=\"$value\"" \
	$testname
}

# Check the results of the:
#
#   -var-list-children VARNAME
#
# command.  The CHILDREN parement should be a list of lists.
# Each inner list can have either 3 or 4 elements, describing
# fields that gdb is expected to report for child variable object,
# in the following order
#
#   - Name
#   - Expression
#   - Number of children
#   - Type
#
# If inner list has 3 elements, the gdb is expected to output no
# type for a child.
#
proc mi_list_varobj_children { varname children testname } {

    set numchildren [llength $children]
    set children_exp {}
    set whatever "\"\[^\"\]+\""

    foreach item $children {

        set name [lindex $item 0]
        set exp [lindex $item  1]
        set numchild [lindex $item 2]
        if {[llength $item] == 4} {
            set type [lindex $item 3]

            lappend children_exp\
                "child={name=\"$name\",exp=\"$exp\",numchild=\"$numchild\",type=\"$type\"}"
        } else {
            lappend children_exp\
                "child={name=\"$name\",exp=\"$exp\",numchild=\"$numchild\"}"
        }
    }
    set children_exp_j [join $children_exp ","]
    set expected "\\^done,numchild=\"$numchildren\",children=\\\[$children_exp_j\\\]"

    verbose -log "Expecting: $expected"

    mi_gdb_test "-var-list-children $varname" $expected $testname
}

# A list of two-element lists.  First element of each list is
# a Tcl statement, and the second element is the line
# number of source C file where the statement originates.
set mi_autotest_data ""
# The name of the source file for autotesting.
set mi_autotest_source ""

proc count_newlines { string } {
    return [regexp -all "\n" $string]
}

# Prepares for running inline tests in FILENAME.
# See comments for mi_run_inline_test for detailed
# explanation of the idea and syntax.
proc mi_prepare_inline_tests { filename } {

    global srcdir
    global subdir
    global mi_autotest_source
    global mi_autotest_data

    set mi_autotest_data {}

    set mi_autotest_source $filename
    
    if { ! [regexp "^/" "$filename"] } then {
	set filename "$srcdir/$subdir/$filename"
    }

    set chan [open $filename]
    set content [read $chan]
    set line_number 1
    while {1} {
        set start [string first "/*:" $content]
        if {$start != -1} {
            set end [string first ":*/" $content]
            if {$end == -1} {
                error "Unterminated special comment in $filename"
            }
            
            set prefix [string range $content 0 $start]
            set prefix_newlines [count_newlines $prefix]
            
            set line_number [expr $line_number+$prefix_newlines]
            set comment_line $line_number

            set comment [string range $content [expr $start+3] [expr $end-1]]

            set comment_newlines [count_newlines $comment]
            set line_number [expr $line_number+$comment_newlines]
            
            set comment [string trim $comment]
            set content [string range $content [expr $end+3] \
                             [string length $content]]
            lappend mi_autotest_data [list $comment $comment_line]
        } else {        
           break
        }        
    }
    close $chan
}

# Helper to mi_run_inline_test below.
# Return the list of all (statement,line_number) lists
# that comprise TESTCASE.  The begin and end markers
# are not included.
proc mi_get_inline_test {testcase} {

    global mi_gdb_prompt
    global mi_autotest_data
    global mi_autotest_source

    set result {}

    set seen_begin 0
    set seen_end 0
    foreach l $mi_autotest_data {

        set comment [lindex $l 0]

        if {$comment == "BEGIN: $testcase"} {
            set seen_begin 1
        } elseif {$comment == "END: $testcase"} {
            set seen_end 1
            break
        } elseif {$seen_begin==1} {
            lappend result $l
        }
    }

    if {$seen_begin == 0} {
        error "Autotest $testcase not found" 
    }

    if {$seen_begin == 1 && $seen_end == 0} {
        error "Missing end marker for test $testcase"
    }

    return $result
}

# Sets temporary breakpoint at LOCATION.
proc mi_tbreak {location} {

    global mi_gdb_prompt

    mi_gdb_test "-break-insert -t $location" \
        {\^done,bkpt=.*} \
        "run to $location (set breakpoint)"    
}

# Send COMMAND that must be a command that resumes
# the inferiour (run/continue/next/etc) and consumes
# the "^running" output from it.
proc mi_send_resuming_command {command test} {

    global mi_gdb_prompt

    send_gdb "220-$command\n"
    gdb_expect {
        -re "220\\^running\r\n${mi_gdb_prompt}" {
        }
        timeout {
            fail $test
        }
    }
}

# Helper to mi_run_inline_test below.
# Sets a temporary breakpoint at LOCATION and runs
# the program using COMMAND.  When the program is stopped
# returns the line at which it.  Returns -1 if line cannot
# be determined.
# Does not check that the line is the same as requested.
# The caller can check itself if required.
proc mi_continue_to_line {location test} {

    mi_tbreak $location   
    mi_send_resuming_command "exec-continue" "run to $location (exec-continue)"
    return [mi_wait_for_stop $test]
}

# Wait until gdb prints the current line.
proc mi_wait_for_stop {test} {

  global mi_gdb_prompt

  gdb_expect {
      -re ".*line=\"(.*)\".*\r\n$mi_gdb_prompt$" {
          return $expect_out(1,string)
      }
      -re ".*$mi_gdb_prompt$" {
          fail "wait for stop ($test)"
      }
      timeout {
          fail "wait for stop ($test)"
      }
  }
}

# Run a MI test embedded in comments in a C file.
# The C file should contain special comments in the following
# three forms:
#
#    /*: BEGIN: testname :*/
#    /*:  <Tcl statements> :*/
#    /*: END: testname :*/
#
# This procedure find the begin and end marker for the requested
# test. Then, a temporary breakpoint is set at the begin
# marker and the program is run (from start).
#
# After that, for each special comment between the begin and end
# marker, the Tcl statements are executed.  It is assumed that
# for each comment, the immediately preceding line is executable
# C statement.  Then, gdb will be single-stepped until that
# preceding C statement is executed, and after that the
# Tcl statements in the comment will be executed.
#
# For example:
#
#     /*: BEGIN: assignment-test :*/
#     v = 10;
#     /*: <Tcl code to check that 'v' is indeed 10 :*/
#     /*: END: assignment-test :*/
#
# The mi_prepare_inline_tests function should be called before
# calling this function.  A given C file can contain several
# inline tests.  The names of the tests must be unique within one
# C file.
#
proc mi_run_inline_test { testcase } {

    global mi_gdb_prompt
    global hex
    global decimal
    global fullname_syntax
    global mi_autotest_source

    set commands [mi_get_inline_test $testcase]

    set first 1
    set line_now 1

    foreach c $commands {
        set statements [lindex $c 0]
        set line [lindex $c 1]
        set line [expr $line-1]

        # We want gdb to be stopped at the expression immediately
        # before the comment.  If this is the first comment, the
        # program is either not started yet or is in some random place,
        # so we run it.  For further comments, we might be already
        # standing at the right line. If not continue till the
        # right line.

        if {$first==1} {
            # Start the program afresh.
            mi_tbreak "$mi_autotest_source:$line"
            mi_run_cmd
            set line_now [mi_wait_for_stop "$testcase: step to $line"]
            set first 0
        } elseif {$line_now!=$line} {
            set line_now [mi_continue_to_line "$mi_autotest_source:$line" "continue to $line"]
        }

        if {$line_now!=$line} {
            fail "$testcase: go to line $line"
        }

        # We're not at the statement right above the comment.
        # Execute that statement so that the comment can test
        # the state after the statement is executed.

        # Single-step past the line.
        mi_send_resuming_command "exec-next" "$testcase: step over $line"
        set line_now [mi_wait_for_stop "$testcase: step over $line"]

        # We probably want to use 'uplevel' so that statements
        # have direct access to global variables that the
        # main 'exp' file has set up.  But it's not yet clear,
        # will need more experience to be sure.
        eval $statements
    }
}