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# Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
# Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  

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

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

# Generic gdb subroutines that should work for any target.  If these
# need to be modified for any target, it can be done with a variable
# or by passing arguments.

load_lib libgloss.exp

global GDB
# OBSOLETE global CHILL_LIB
# OBSOLETE global CHILL_RT0

# OBSOLETE if ![info exists CHILL_LIB] {
# OBSOLETE     set CHILL_LIB [findfile $base_dir/../../gcc/ch/runtime/libchill.a "$base_dir/../../gcc/ch/runtime/libchill.a" [transform -lchill]]
# OBSOLETE }
# OBSOLETE verbose "using CHILL_LIB = $CHILL_LIB" 2
# OBSOLETE if ![info exists CHILL_RT0] {
# OBSOLETE     set CHILL_RT0 [findfile $base_dir/../../gcc/ch/runtime/chillrt0.o "$base_dir/../../gcc/ch/runtime/chillrt0.o" ""]
# OBSOLETE }
# OBSOLETE verbose "using CHILL_RT0 = $CHILL_RT0" 2

if [info exists TOOL_EXECUTABLE] {
    set GDB $TOOL_EXECUTABLE;
}
if ![info exists GDB] {
    if ![is_remote host] {
        set GDB [findfile $base_dir/../../gdb/gdb "$base_dir/../../gdb/gdb" [transform gdb]]
    } else {
        set GDB [transform gdb];
    }
}
verbose "using GDB = $GDB" 2

global GDBFLAGS
if ![info exists GDBFLAGS] {
    set GDBFLAGS "-nx"
}
verbose "using GDBFLAGS = $GDBFLAGS" 2

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

# Needed for some tests under Cygwin.
global EXEEXT
global env

if ![info exists env(EXEEXT)] {
    set EXEEXT ""
} else {
    set EXEEXT $env(EXEEXT)
}

### Only procedures should come after this point.

#
# gdb_version -- extract and print the version number of GDB
#
proc default_gdb_version {} {
    global GDB
    global GDBFLAGS
    global gdb_prompt
    set fileid [open "gdb_cmd" w];
    puts $fileid "q";
    close $fileid;
    set cmdfile [remote_download host "gdb_cmd"];
    set output [remote_exec host "$GDB -nw --command $cmdfile"]
    remote_file build delete "gdb_cmd";
    remote_file host delete "$cmdfile";
    set tmp [lindex $output 1];
    set version ""
    regexp " \[0-9\]\[^ \t\n\r\]+" "$tmp" version
    if ![is_remote host] {
        clone_output "[which $GDB] version $version $GDBFLAGS\n"
    } else {
        clone_output "$GDB on remote host version $version $GDBFLAGS\n"
    }
}

proc gdb_version { } {
    return [default_gdb_version];
}

#
# gdb_unload -- unload a file if one is loaded
#

proc gdb_unload {} {
    global verbose
    global GDB
    global gdb_prompt
    send_gdb "file\n"
    gdb_expect 60 {
        -re "No executable file now\[^\r\n\]*\[\r\n\]" { exp_continue }
        -re "No symbol file now\[^\r\n\]*\[\r\n\]" { exp_continue }
        -re "A program is being debugged already..*Kill it.*y or n. $"\
            { send_gdb "y\n"
                verbose "\t\tKilling previous program being debugged"
            exp_continue
        }
        -re "Discard symbol table from .*y or n.*$" {
            send_gdb "y\n"
            exp_continue
        }
        -re "$gdb_prompt $" {}
        timeout {
            perror "couldn't unload file in $GDB (timed out)."
            return -1
        }
    }
}

# 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 delete_breakpoints {} {
    global gdb_prompt

    # we need a larger timeout value here or this thing just confuses
    # itself.  May need a better implementation if possible. - guo
    #
    send_gdb "delete breakpoints\n"
    gdb_expect 100 {
         -re "Delete all breakpoints.*y or n.*$" {
            send_gdb "y\n";
            exp_continue
        }
         -re "$gdb_prompt $" { # This happens if there were no breakpoints
            }
         timeout { perror "Delete all breakpoints in delete_breakpoints (timeout)" ; return }
    }
    send_gdb "info breakpoints\n"
    gdb_expect 100 {
         -re "No breakpoints or watchpoints..*$gdb_prompt $" {}
         -re "$gdb_prompt $" { perror "breakpoints not deleted" ; return }
         -re "Delete all breakpoints.*or n.*$" {
            send_gdb "y\n";
            exp_continue
        }
         timeout { perror "info breakpoints (timeout)" ; return }
    }
}


#
# Generic run command.
#
# The second pattern below matches up to the first newline *only*.
# Using ``.*$'' could swallow up output that we attempt to match
# elsewhere.
#
proc gdb_run_cmd {args} {
    global gdb_prompt

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

    if [target_info exists use_gdb_stub] {
        if [target_info exists gdb,do_reload_on_run] {
            # Specifying no file, defaults to the executable
            # currently being debugged.
            if { [gdb_load ""] < 0 } {
                return;
            }
            send_gdb "continue\n";
            gdb_expect 60 {
                -re "Continu\[^\r\n\]*\[\r\n\]" {}
                default {}
            }
            return;
        }

        if [target_info exists gdb,start_symbol] {
            set start [target_info gdb,start_symbol];
        } else {
            set start "start";
        }
        send_gdb  "jump *$start\n"
        set start_attempt 1;
        while { $start_attempt } {
            # Cap (re)start attempts at three to ensure that this loop
            # always eventually fails.  Don't worry about trying to be
            # clever and not send a command when it has failed.
            if [expr $start_attempt > 3] {
                perror "Jump to start() failed (retry count exceeded)";
                return;
            }
            set start_attempt [expr $start_attempt + 1];
            gdb_expect 30 {
                -re "Continuing at \[^\r\n\]*\[\r\n\]" {
                    set start_attempt 0;
                }
                -re "No symbol \"_start\" in current.*$gdb_prompt $" {
                    perror "Can't find start symbol to run in gdb_run";
                    return;
                }
                -re "No symbol \"start\" in current.*$gdb_prompt $" {
                    send_gdb "jump *_start\n";
                }
                -re "No symbol.*context.*$gdb_prompt $" {
                    set start_attempt 0;
                }
                -re "Line.* Jump anyway.*y or n. $" {
                    send_gdb "y\n"
                }
                -re "The program is not being run.*$gdb_prompt $" {
                    if { [gdb_load ""] < 0 } {
                        return;
                    }
                    send_gdb "jump *$start\n";
                }
                timeout {
                    perror "Jump to start() failed (timeout)"; 
                    return
                }
            }
        }
        if [target_info exists gdb_stub] {
            gdb_expect 60 {
                -re "$gdb_prompt $" {
                    send_gdb "continue\n"
                }
            }
        }
        return
    }
    send_gdb "run $args\n"
# This doesn't work quite right yet.
    gdb_expect 60 {
        -re "The program .* has been started already.*y or n. $" {
            send_gdb "y\n"
            exp_continue
        }
        -re "Starting program: \[^\r\n\]*" {}
    }
}

proc gdb_breakpoint { function } {
    global gdb_prompt
    global decimal

    send_gdb "break $function\n"
    # The first two regexps are what we get with -g, the third is without -g.
    gdb_expect 30 {
        -re "Breakpoint \[0-9\]* at .*: file .*, line $decimal.\r\n$gdb_prompt $" {}
        -re "Breakpoint \[0-9\]*: file .*, line $decimal.\r\n$gdb_prompt $" {}
        -re "Breakpoint \[0-9\]* at .*$gdb_prompt $" {}
        -re "$gdb_prompt $" { fail "setting breakpoint at $function" ; return 0 }
        timeout { fail "setting breakpoint at $function (timeout)" ; return 0 }
    }
    return 1;
}    

# Set breakpoint at function and run gdb until it breaks there.
# Since this is the only breakpoint that will be set, if it stops
# at a breakpoint, we will assume it is the one we want.  We can't
# just compare to "function" because it might be a fully qualified,
# single quoted C++ function specifier.

proc runto { function } {
    global gdb_prompt
    global decimal

    delete_breakpoints

    if ![gdb_breakpoint $function] {
        return 0;
    }

    gdb_run_cmd
    
    # the "at foo.c:36" output we get with -g.
    # the "in func" output we get without -g.
    gdb_expect 30 {
        -re "Break.* at .*:$decimal.*$gdb_prompt $" {
            return 1
        }
        -re "Breakpoint \[0-9\]*, \[0-9xa-f\]* in .*$gdb_prompt $" { 
            return 1
        }
        -re "$gdb_prompt $" { 
            fail "running to $function in runto"
            return 0
        }
        timeout { 
            fail "running to $function in runto (timeout)"
            return 0
        }
    }
    return 1
}

#
# runto_main -- ask gdb to run until we hit a breakpoint at main.
#               The case where the target uses stubs has to be handled
#               specially--if it uses stubs, assuming we hit
#               breakpoint() and just step out of the function.
#
proc runto_main { } {
    global gdb_prompt
    global decimal

    if ![target_info exists gdb_stub] {
        return [runto main]
    }                   

    delete_breakpoints

    gdb_step_for_stub;

    return 1
}


### Continue, and expect to hit a breakpoint.
### Report a pass or fail, depending on whether it seems to have
### worked.  Use NAME as part of the test name; each call to
### continue_to_breakpoint should use a NAME which is unique within
### that test file.
proc gdb_continue_to_breakpoint {name} {
    global gdb_prompt
    set full_name "continue to breakpoint: $name"

    send_gdb "continue\n"
    gdb_expect {
        -re "Breakpoint .* at .*\r\n$gdb_prompt $" {
            pass $full_name
        }
        -re ".*$gdb_prompt $" {
            fail $full_name
        }
        timeout { 
            fail "$full_name (timeout)"
        }
    }
}


# gdb_test COMMAND PATTERN MESSAGE QUESTION RESPONSE
# 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 an optional message to be printed.  If this is
#   omitted, then the pass/fail messages use the command string as the
#   message.  (If this is the empty string, then sometimes we don't
#   call pass or fail at all; I don't understand this at all.)
# QUESTION is a question GDB may ask in response to COMMAND, like
#   "are you sure?"
# RESPONSE is the response to send if QUESTION appears.
#
# Returns:
#    1 if the test failed,
#    0 if the test passes,
#   -1 if there was an internal error.
#  
proc gdb_test { args } {
    global verbose
    global gdb_prompt
    global GDB
    upvar timeout timeout

    if [llength $args]>2 then {
        set message [lindex $args 2]
    } else {
        set message [lindex $args 0]
    }
    set command [lindex $args 0]
    set pattern [lindex $args 1]

    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";
    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;
                }
                # since we're checking if each line of the multi-line
                # command are 'accepted' by GDB here,
                # we need to set -notransfer expect option so that
                # command output is not lost for pattern matching
                # - guo
                gdb_expect 2 {
                    -notransfer -re "\[\r\n\]" { verbose "partial: match" 3 }
                    timeout { verbose "partial: timeout" 3 }
                }
                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 [target_info exists gdb,timeout] {
        set tmt [target_info gdb,timeout];
    } else {
        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.*$gdb_prompt $" {
            if ![isnative] then {
                warning "Can`t communicate to remote target."
            }
            gdb_exit
            gdb_start
            set result -1
        }
         -re "\[\r\n\]*($pattern)\[\r\n\]+$gdb_prompt $" {
            if ![string match "" $message] then {
                pass "$message"
            }
            set result 0
        }
         -re "(${question_string})$" {
            send_gdb "$response_string\n";
            exp_continue;
        }
         -re "Undefined\[a-z\]* command:.*$gdb_prompt $" {
            perror "Undefined command \"$command\"."
            fail "$message"
            set result 1
        }
         -re "Ambiguous command.*$gdb_prompt $" {
            perror "\"$command\" is not a unique command name."
            fail "$message"
            set result 1
        }
         -re "Program exited with code \[0-9\]+.*$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 "EXIT code \[0-9\r\n\]+Program exited normally.*$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.*$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 ".*$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
        }
    }
    return $result
}

# Test that a command gives an error.  For pass or fail, return
# a 1 to indicate that more tests can proceed.  However a timeout
# is a serious error, generates a special fail message, and causes
# a 0 to be returned to indicate that more tests are likely to fail
# as well.

proc test_print_reject { args } {
    global gdb_prompt
    global verbose

    if [llength $args]==2 then {
        set expectthis [lindex $args 1]
    } else {
        set expectthis "should never match this bogus string"
    }
    set sendthis [lindex $args 0]
    if $verbose>2 then {
        send_user "Sending \"$sendthis\" to gdb\n"
        send_user "Looking to match \"$expectthis\"\n"
    }
    send_gdb "$sendthis\n"
    #FIXME: Should add timeout as parameter.
    gdb_expect {
        -re "A .* in expression.*\\.*$gdb_prompt $" {
            pass "reject $sendthis"
            return 1
        }
        -re "Invalid syntax in expression.*$gdb_prompt $" {
            pass "reject $sendthis"
            return 1
        }
        -re "Junk after end of expression.*$gdb_prompt $" {
            pass "reject $sendthis"
            return 1
        }
        -re "Invalid number.*$gdb_prompt $" {
            pass "reject $sendthis"
            return 1
        }
        -re "Invalid character constant.*$gdb_prompt $" {
            pass "reject $sendthis"
            return 1
        }
        -re "No symbol table is loaded.*$gdb_prompt $" {
            pass "reject $sendthis"
            return 1
        }
        -re "No symbol .* in current context.*$gdb_prompt $" {
            pass "reject $sendthis"
            return 1
        }
        -re "Unmatched single quote.*$gdb_prompt $" {
            pass "reject $sendthis"
            return 1
        }
        -re "A character constant must contain at least one character.*$gdb_prompt $" {
            pass "reject $sendthis"
            return 1
        }
        -re "$expectthis.*$gdb_prompt $" {
            pass "reject $sendthis"
            return 1
        }
        -re ".*$gdb_prompt $" {
            fail "reject $sendthis"
            return 1
        }
        default {
            fail "reject $sendthis (eof or timeout)"
            return 0
        }
    }
}

# Given an input string, adds backslashes as needed to create a
# regexp that will match the string.

proc string_to_regexp {str} {
    set result $str
    regsub -all {[]*+.|()^$\[]} $str {\\&} result
    return $result
}

# Same as gdb_test, but the second parameter is not a regexp,
# but a string that must match exactly.

proc gdb_test_exact { args } {
    upvar timeout timeout

    set command [lindex $args 0]

    # This applies a special meaning to a null string pattern.  Without
    # this, "$pattern\r\n$gdb_prompt $" will match anything, including error
    # messages from commands that should have no output except a new
    # prompt.  With this, only results of a null string will match a null
    # string pattern.

    set pattern [lindex $args 1]
    if [string match $pattern ""] {
        set pattern [string_to_regexp [lindex $args 0]]
    } else {
        set pattern [string_to_regexp [lindex $args 1]]
    }

    # It is most natural to write the pattern argument with only
    # embedded \n's, especially if you are trying to avoid Tcl quoting
    # problems.  But gdb_expect really wants to see \r\n in patterns.  So
    # transform the pattern here.  First transform \r\n back to \n, in
    # case some users of gdb_test_exact already do the right thing.
    regsub -all "\r\n" $pattern "\n" pattern
    regsub -all "\n" $pattern "\r\n" pattern
    if [llength $args]==3 then {
        set message [lindex $args 2]
    } else {
        set message $command
    }

    return [gdb_test $command $pattern $message]
}

proc gdb_reinitialize_dir { subdir } {
    global gdb_prompt

    if [is_remote host] {
        return "";
    }
    send_gdb "dir\n"
    gdb_expect 60 {
        -re "Reinitialize source path to empty.*y or n. " {
            send_gdb "y\n"
            gdb_expect 60 {
                -re "Source directories searched.*$gdb_prompt $" {
                    send_gdb "dir $subdir\n"
                    gdb_expect 60 {
                        -re "Source directories searched.*$gdb_prompt $" {
                            verbose "Dir set to $subdir"
                        }
                        -re "$gdb_prompt $" {
                            perror "Dir \"$subdir\" failed."
                        }
                    }
                }
                -re "$gdb_prompt $" {
                    perror "Dir \"$subdir\" failed."
                }
            }
        }
        -re "$gdb_prompt $" {
            perror "Dir \"$subdir\" failed."
        }
    }
}

#
# gdb_exit -- exit the GDB, killing the target program if necessary
#
proc default_gdb_exit {} {
    global GDB
    global GDBFLAGS
    global verbose
    global gdb_spawn_id;

    gdb_stop_suppressing_tests;

    if ![info exists gdb_spawn_id] {
        return;
    }

    verbose "Quitting $GDB $GDBFLAGS"

    if { [is_remote host] && [board_info host exists fileid] } {
        send_gdb "quit\n";
        gdb_expect 10 {
            -re "y or n" {
                send_gdb "y\n";
                exp_continue;
            }
            -re "DOSEXIT code" { }
            default { }
        }
    }

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

#
# load a file into the debugger.
# return a -1 if anything goes wrong.
#
proc gdb_file_cmd { arg } {
    global verbose
    global loadpath
    global loadfile
    global GDB
    global gdb_prompt
    upvar timeout timeout

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

    send_gdb "file $arg\n"
    gdb_expect 120 {
        -re "Reading symbols from.*done.*$gdb_prompt $" {
            verbose "\t\tLoaded $arg into the $GDB"
            return 0
        }
        -re "has no symbol-table.*$gdb_prompt $" {
            perror "$arg wasn't compiled with \"-g\""
            return -1
        }
        -re "A program is being debugged already.*Kill it.*y or n. $" {
            send_gdb "y\n"
                verbose "\t\tKilling previous program being debugged"
            exp_continue
        }
        -re "Load new symbol table from \".*\".*y or n. $" {
            send_gdb "y\n"
            gdb_expect 120 {
                -re "Reading symbols from.*done.*$gdb_prompt $" {
                    verbose "\t\tLoaded $arg with new symbol table into $GDB"
                    return 0
                }
                timeout {
                    perror "(timeout) Couldn't load $arg, other program already loaded."
                    return -1
                }
            }
        }
        -re "No such file or directory.*$gdb_prompt $" {
            perror "($arg) No such file or directory\n"
            return -1
        }
        -re "$gdb_prompt $" {
            perror "couldn't load $arg into $GDB."
            return -1
            }
        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
        }
    }
}

#
# start gdb -- start gdb running, default procedure
#
# 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 default_gdb_start { } {
    global verbose
    global GDB
    global GDBFLAGS
    global gdb_prompt
    global timeout
    global gdb_spawn_id;

    gdb_stop_suppressing_tests;

    verbose "Spawning $GDB -nw $GDBFLAGS"

    if [info exists gdb_spawn_id] {
        return 0;
    }

    if ![is_remote host] {
        if { [which $GDB] == 0 } then {
            perror "$GDB does not exist."
            exit 1
        }
    }
    set res [remote_spawn host "$GDB -nw $GDBFLAGS [host_info gdb_opts]"];
    if { $res < 0 || $res == "" } {
        perror "Spawning $GDB failed."
        return 1;
    }
    gdb_expect 360 {
        -re "\[\r\n\]$gdb_prompt $" {
            verbose "GDB initialized."
        }
        -re "$gdb_prompt $"     {
            perror "GDB never initialized."
            return -1
        }
        timeout {
            perror "(timeout) GDB never initialized after 10 seconds."
            remote_close host;
            return -1
        }
    }
    set gdb_spawn_id -1;
    # force the height to "unlimited", so no pagers get used

    send_gdb "set height 0\n"
    gdb_expect 10 {
        -re "$gdb_prompt $" { 
            verbose "Setting height to 0." 2
        }
        timeout {
            warning "Couldn't set the height to 0"
        }
    }
    # force the width to "unlimited", so no wraparound occurs
    send_gdb "set width 0\n"
    gdb_expect 10 {
        -re "$gdb_prompt $" {
            verbose "Setting width to 0." 2
        }
        timeout {
            warning "Couldn't set the width to 0."
        }
    }
    return 0;
}

# Return a 1 for configurations for which we don't even want to try to
# test C++.

proc skip_cplus_tests {} {
    if { [istarget "d10v-*-*"] } {
        return 1
    }
    if { [istarget "h8300-*-*"] } {
        return 1
    }
    return 0
}

# OBSOLETE # * For crosses, the CHILL runtime doesn't build because it
# OBSOLETE # can't find setjmp.h, stdio.h, etc.
# OBSOLETE # * For AIX (as of 16 Mar 95), (a) there is no language code for
# OBSOLETE # CHILL in output_epilog in gcc/config/rs6000/rs6000.c, (b) collect2
# OBSOLETE # does not get along with AIX's too-clever linker.
# OBSOLETE # * On Irix5, there is a bug whereby set of bool, etc., don't get
# OBSOLETE # TYPE_LOW_BOUND for the bool right because force_to_range_type doesn't
# OBSOLETE # work with stub types.
# OBSOLETE # Lots of things seem to fail on the PA, and since it's not a supported
# OBSOLETE # chill target at the moment, don't run the chill tests.

# OBSOLETE proc skip_chill_tests {} {
# OBSOLETE     if ![info exists do_chill_tests] {
# OBSOLETE      return 1;
# OBSOLETE     }
# OBSOLETE     eval set skip_chill [expr ![isnative] || [istarget "*-*-aix*"] || [istarget "*-*-irix5*"] || [istarget "*-*-irix6*"] || [istarget "alpha-*-osf*"] || [istarget "hppa*-*-*"]]
# OBSOLETE     verbose "Skip chill tests is $skip_chill"
# OBSOLETE     return $skip_chill
# OBSOLETE }

# Skip all the tests in the file if you are not on an hppa running
# hpux target.

proc skip_hp_tests {} {
    eval set skip_hp [ expr ![isnative] || ![istarget "hppa*-*-hpux*"] ]
    verbose "Skip hp tests is $skip_hp"
    return $skip_hp
}

proc get_compiler_info {binfile args} {
    # Create and source the file that provides information about the compiler
    # used to compile the test case.
    # Compiler_type can be null or c++. If null we assume c.
    global srcdir
    global subdir
    # These two come from compiler.c.
    global signed_keyword_not_used
    global gcc_compiled

    if {![istarget "hppa*-*-hpux*"] && ![istarget "mips*-*-irix*"]} {
        if { [llength $args] > 0 } {
            if {$args == "c++"} {
                if { [gdb_compile "${srcdir}/lib/compiler.cc" "${binfile}.ci" preprocess {}] != "" } {
                    perror "Couldn't make ${binfile}.ci file"
                    return 1;
                }
            }
        } else {
            if { [gdb_compile "${srcdir}/lib/compiler.c" "${binfile}.ci" preprocess {}] != "" } {
                perror "Couldn't make ${binfile}.ci file"
                return 1;
            }
        }
    } else {
        if { [llength $args] > 0 } {
            if {$args == "c++"} {
                if { [eval gdb_preprocess \
                        [list "${srcdir}/lib/compiler.cc" "${binfile}.ci"] \
                        $args] != "" } {
                    perror "Couldn't make ${binfile}.ci file"
                    return 1;
                }
            }
        } elseif { $args != "f77" } {
            if { [eval gdb_preprocess \
                    [list "${srcdir}/lib/compiler.c" "${binfile}.ci"] \
                    $args] != "" } {
                perror "Couldn't make ${binfile}.ci file"
                return 1;
            }
        }
    }
    
    uplevel \#0 { set gcc_compiled 0 }

    if { [llength $args] == 0 || $args != "f77" } {
        source ${binfile}.ci
    }

    # Most compilers will evaluate comparisons and other boolean
    # operations to 0 or 1.
    uplevel \#0 { set true 1 }
    uplevel \#0 { set false 0 }

    uplevel \#0 { set hp_cc_compiler 0 }
    uplevel \#0 { set hp_aCC_compiler 0 }
    uplevel \#0 { set hp_f77_compiler 0 }
    uplevel \#0 { set hp_f90_compiler 0 }
    if { !$gcc_compiled && [istarget "hppa*-*-hpux*"] } {
        # Check for the HP compilers
        set compiler [lindex [split [get_compiler $args] " "] 0]
        catch "exec what $compiler" output
        if [regexp ".*HP aC\\+\\+.*" $output] {
            uplevel \#0 { set hp_aCC_compiler 1 }
            # Use of aCC results in boolean results being displayed as
            # "true" or "false"
            uplevel \#0 { set true true }
            uplevel \#0 { set false false }
        } elseif [regexp ".*HP C Compiler.*" $output] {
            uplevel \#0 { set hp_cc_compiler 1 }
        } elseif [regexp ".*HP-UX f77.*" $output] {
            uplevel \#0 { set hp_f77_compiler 1 }
        } elseif [regexp ".*HP-UX f90.*" $output] {
            uplevel \#0 { set hp_f90_compiler 1 }
        }
    }

    return 0;
}

proc get_compiler {args} {
    global CC CC_FOR_TARGET CXX CXX_FOR_TARGET F77_FOR_TARGET

    if { [llength $args] == 0 
         || ([llength $args] == 1 && [lindex $args 0] == "") } {
        set which_compiler "c"
    } else {
        if { $args =="c++" } {
            set which_compiler "c++"
        } elseif { $args =="f77" } {
            set which_compiler "f77"
        } else {
            perror "Unknown compiler type supplied to gdb_preprocess"
            return ""
        }
    }

    if [info exists CC_FOR_TARGET] {
        if {$which_compiler == "c"} {
            set compiler $CC_FOR_TARGET
        }
    }
 
    if [info exists CXX_FOR_TARGET] {
        if {$which_compiler == "c++"} {
            set compiler $CXX_FOR_TARGET
        }
    }

    if [info exists F77_FOR_TARGET] {
        if {$which_compiler == "f77"} {
            set compiler $F77_FOR_TARGET
        }
    }

    if { ![info exists compiler] } {
        if { $which_compiler == "c" } {
            if {[info exists CC]} {
                set compiler $CC
            }
        }
        if { $which_compiler == "c++" } {
            if {[info exists CXX]} {
                set compiler $CXX
            }
        }
        if {![info exists compiler]} {
            set compiler [board_info [target_info name] compiler];
            if { $compiler == "" } {
                perror "get_compiler: No compiler found"
                return ""
            }
        }
    }

    return $compiler
}

proc gdb_preprocess {source dest args} {
    set compiler [get_compiler "$args"]
    if { $compiler == "" } {
        return 1
    }

    set cmdline "$compiler -E $source > $dest"

    verbose "Invoking $compiler -E $source > $dest"
    verbose -log "Executing on local host: $cmdline" 2
    set status [catch "exec ${cmdline}" exec_output]

    set result [prune_warnings $exec_output]
    regsub "\[\r\n\]*$" "$result" "" result;
    regsub "^\[\r\n\]*" "$result" "" result;
    if { $result != "" } {
        clone_output "gdb compile failed, $result"
    }
    return $result;
}

set gdb_wrapper_initialized 0

proc gdb_wrapper_init { args } {
    global gdb_wrapper_initialized;
    global gdb_wrapper_file;
    global gdb_wrapper_flags;

    if { $gdb_wrapper_initialized == 1 } { return; }

    if {[target_info exists needs_status_wrapper] && \
            [target_info needs_status_wrapper] != "0"} {
        set result [build_wrapper "testglue.o"];
        if { $result != "" } {
            set gdb_wrapper_file [lindex $result 0];
            set gdb_wrapper_flags [lindex $result 1];
        } else {
            warning "Status wrapper failed to build."
        }
    }
    set gdb_wrapper_initialized 1
}

proc gdb_compile {source dest type options} {
    global GDB_TESTCASE_OPTIONS;
    global gdb_wrapper_file;
    global gdb_wrapper_flags;
    global gdb_wrapper_initialized;

    if [target_info exists gdb_stub] {
        set options2 { "additional_flags=-Dusestubs" }
        lappend options "libs=[target_info gdb_stub]";
        set options [concat $options2 $options]
    }
    if [target_info exists is_vxworks] {
        set options2 { "additional_flags=-Dvxworks" }
        lappend options "libs=[target_info gdb_stub]";
        set options [concat $options2 $options]
    }
    if [info exists GDB_TESTCASE_OPTIONS] {
        lappend options "additional_flags=$GDB_TESTCASE_OPTIONS";
    }
    verbose "options are $options"
    verbose "source is $source $dest $type $options"

    if { $gdb_wrapper_initialized == 0 } { gdb_wrapper_init }

    if {[target_info exists needs_status_wrapper] && \
            [target_info needs_status_wrapper] != "0" && \
            [info exists gdb_wrapper_file]} {
        lappend options "libs=${gdb_wrapper_file}"
        lappend options "ldflags=${gdb_wrapper_flags}"
    }

    set result [target_compile $source $dest $type $options];
    regsub "\[\r\n\]*$" "$result" "" result;
    regsub "^\[\r\n\]*" "$result" "" result;
    if { $result != "" } {
        clone_output "gdb compile failed, $result"
    }
    return $result;
}


# This is just like gdb_compile, above, except that it tries compiling
# against several different thread libraries, to see which one this
# system has.
proc gdb_compile_pthreads {source dest type options} {
    set built_binfile 0
    set why_msg "unrecognized error"
    foreach lib {-lpthreads -lpthread -lthread} {
        # This kind of wipes out whatever libs the caller may have
        # set.  Or maybe theirs will override ours.  How infelicitous.
        set options_with_lib [concat $options [list libs=$lib]]
        set ccout [gdb_compile $source $dest $type $options_with_lib]
        switch -regexp -- $ccout {
            ".*no posix threads support.*" {
                set why_msg "missing threads include file"
                break
            }
            ".*cannot open -lpthread.*" {
                set why_msg "missing runtime threads library"
            }
            ".*Can't find library for -lpthread.*" {
                set why_msg "missing runtime threads library"
            }
            {^$} {
                pass "successfully compiled posix threads test case"
                set built_binfile 1
                break
            }
        }
    }
    if {!$built_binfile} {
        unsupported "Couldn't compile $source: ${why_msg}"
        return -1
    }
}

proc send_gdb { string } {
    global suppress_flag;
    if { $suppress_flag } {
        return "suppressed";
    }
    return [remote_send host "$string"];
}

#
#

proc gdb_expect { args } {
    if { [llength $args] == 2  && [lindex $args 0] != "-re" } {
        set gtimeout [lindex $args 0];
        set expcode [list [lindex $args 1]];
    } else {
        upvar timeout timeout;

        set expcode $args;
        if [target_info exists gdb,timeout] {
            if [info exists timeout] {
                if { $timeout < [target_info gdb,timeout] } {
                    set gtimeout [target_info gdb,timeout];
                } else {
                    set gtimeout $timeout;
                }
            } else {
                set gtimeout [target_info gdb,timeout];
            }
        }

        if ![info exists gtimeout] {
            global timeout;
            if [info exists timeout] {
                set gtimeout $timeout;
            } else {
                # Eeeeew.
                set gtimeout 60;
            }
        }
    }
    global suppress_flag;
    global remote_suppress_flag;
    if [info exists remote_suppress_flag] {
        set old_val $remote_suppress_flag;
    }
    if [info exists suppress_flag] {
        if { $suppress_flag } {
            set remote_suppress_flag 1;
        }
    }
    set code [catch \
        {uplevel remote_expect host $gtimeout $expcode} string];
    if [info exists old_val] {
        set remote_suppress_flag $old_val;
    } else {
        if [info exists remote_suppress_flag] {
            unset remote_suppress_flag;
        }
    }

    if {$code == 1} {
        global errorInfo errorCode;

        return -code error -errorinfo $errorInfo -errorcode $errorCode $string
    } elseif {$code == 2} {
        return -code return $string
    } elseif {$code == 3} {
        return
    } elseif {$code > 4} {
        return -code $code $string
    }
}

# gdb_expect_list MESSAGE SENTINEL LIST -- expect a sequence of outputs
#
# Check for long sequence of output by parts.
# MESSAGE: is the test message to be printed with the test success/fail.
# SENTINEL: Is the terminal pattern indicating that output has finished.
# LIST: is the sequence of outputs to match.
# If the sentinel is recognized early, it is considered an error.
#
# Returns:
#    1 if the test failed,
#    0 if the test passes,
#   -1 if there was an internal error.
#
proc gdb_expect_list {test sentinel list} {
    global gdb_prompt
    global suppress_flag
    set index 0
    set ok 1
    if { $suppress_flag } {
        set ok 0
        unresolved "${test}"
    }
    while { ${index} < [llength ${list}] } {
        set pattern [lindex ${list} ${index}]
        set index [expr ${index} + 1]
        if { ${index} == [llength ${list}] } {
            if { ${ok} } {
                gdb_expect {
                    -re "${pattern}${sentinel}" {
                        # pass "${test}, pattern ${index} + sentinel"
                    }
                    -re "${sentinel}" {
                        fail "${test} (pattern ${index} + sentinel)"
                        set ok 0
                    }
                    timeout {
                        fail "${test} (pattern ${index} + sentinel) (timeout)"
                        set ok 0
                    }
                }
            } else {
                # unresolved "${test}, pattern ${index} + sentinel"
            }
        } else {
            if { ${ok} } {
                gdb_expect {
                    -re "${pattern}" {
                        # pass "${test}, pattern ${index}"
                    }
                    -re "${sentinel}" {
                        fail "${test} (pattern ${index})"
                        set ok 0
                    }
                    timeout {
                        fail "${test} (pattern ${index}) (timeout)"
                        set ok 0
                    }
                }
            } else {
                # unresolved "${test}, pattern ${index}"
            }
        }
    }
    if { ${ok} } {
        pass "${test}"
        return 0
    } else {
        return 1
    }
}

#
#
proc gdb_suppress_entire_file { reason } {
    global suppress_flag;

    warning "$reason\n";
    set suppress_flag -1;
}

#
# Set suppress_flag, which will cause all subsequent calls to send_gdb and
# gdb_expect to fail immediately (until the next call to 
# gdb_stop_suppressing_tests).
#
proc gdb_suppress_tests { args } {
    global suppress_flag;

    return;  # fnf - disable pending review of results where
             # testsuite ran better without this
    incr suppress_flag;

    if { $suppress_flag == 1 } {
        if { [llength $args] > 0 } {
            warning "[lindex $args 0]\n";
        } else {
            warning "Because of previous failure, all subsequent tests in this group will automatically fail.\n";
        }
    }
}

#
# Clear suppress_flag.
#
proc gdb_stop_suppressing_tests { } {
    global suppress_flag;

    if [info exists suppress_flag] {
        if { $suppress_flag > 0 } {
            set suppress_flag 0;
            clone_output "Tests restarted.\n";
        }
    } else {
        set suppress_flag 0;
    }
}

proc gdb_clear_suppressed { } {
    global suppress_flag;

    set suppress_flag 0;
}

proc gdb_start { } {
    default_gdb_start
}

proc gdb_exit { } {
    catch default_gdb_exit
}

#
# gdb_load -- load a file into the debugger.
#             return a -1 if anything goes wrong.
#
proc gdb_load { arg } {
    return [gdb_file_cmd $arg]
}

proc gdb_continue { function } {
    global decimal

    return [gdb_test "continue" ".*Breakpoint $decimal, $function .*" "continue to $function"];
}

proc default_gdb_init { args } {
    global gdb_wrapper_initialized
    
    gdb_clear_suppressed;

    # Make sure that the wrapper is rebuilt
    # with the appropriate multilib option.
    set gdb_wrapper_initialized 0
    
    # Uh, this is lame. Really, really, really lame. But there's this *one*
    # testcase that will fail in random places if we don't increase this.
    match_max -d 20000

    # We want to add the name of the TCL testcase to the PASS/FAIL messages.
    if { [llength $args] > 0 } {
        global pf_prefix

        set file [lindex $args 0];

        set pf_prefix "[file tail [file dirname $file]]/[file tail $file]:";
    }
    global gdb_prompt;
    if [target_info exists gdb_prompt] {
        set gdb_prompt [target_info gdb_prompt];
    } else {
        set gdb_prompt "\\(gdb\\)"
    }
}

proc gdb_init { args } {
    return [eval default_gdb_init $args];
}

proc gdb_finish { } {
    gdb_exit;
}

global debug_format
set debug_format "unknown"

# Run the gdb command "info source" and extract the debugging format
# information from the output and save it in debug_format.

proc get_debug_format { } {
    global gdb_prompt
    global verbose
    global expect_out
    global debug_format

    set debug_format "unknown"
    send_gdb "info source\n"
    gdb_expect 10 {
        -re "Compiled with (.*) debugging format.\r\n.*$gdb_prompt $" {
            set debug_format $expect_out(1,string)
            verbose "debug format is $debug_format"
            return 1;
        }
        -re "No current source file.\r\n$gdb_prompt $" {
            perror "get_debug_format used when no current source file"
            return 0;
        }
        -re "$gdb_prompt $" {
            warning "couldn't check debug format (no valid response)."
            return 1;
        }
        timeout {
            warning "couldn't check debug format (timed out)."
            return 1;
        }
    }
}

# Return true if FORMAT matches the debug format the current test was
# compiled with.  FORMAT is a shell-style globbing pattern; it can use
# `*', `[...]', and so on.
#
# This function depends on variables set by `get_debug_format', above.

proc test_debug_format {format} {
    global debug_format

    return [expr [string match $format $debug_format] != 0]
}

# Like setup_xfail, but takes the name of a debug format (DWARF 1,
# COFF, stabs, etc).  If that format matches the format that the
# current test was compiled with, then the next test is expected to
# fail for any target.  Returns 1 if the next test or set of tests is
# expected to fail, 0 otherwise (or if it is unknown).  Must have
# previously called get_debug_format.
proc setup_xfail_format { format } {
    set ret [test_debug_format $format];

    if {$ret} then {
        setup_xfail "*-*-*"
    }
    return $ret;
}

proc gdb_step_for_stub { } {
    global gdb_prompt;

    if ![target_info exists gdb,use_breakpoint_for_stub] {
        if [target_info exists gdb_stub_step_command] {
            set command [target_info gdb_stub_step_command];
        } else {
            set command "step";
        }
        send_gdb "${command}\n";
        set tries 0;
        gdb_expect 60 {
            -re "(main.* at |.*in .*start).*$gdb_prompt" {
                return;
            }
            -re ".*$gdb_prompt" {
                incr tries;
                if { $tries == 5 } {
                    fail "stepping out of breakpoint function";
                    return;
                }
                send_gdb "${command}\n";
                exp_continue;
            }
            default {
                fail "stepping out of breakpoint function";
                return;
            }
        }
    }
    send_gdb "where\n";
    gdb_expect {
        -re "main\[^\r\n\]*at \(\[^:]+\):\(\[0-9\]+\)" {
            set file $expect_out(1,string);
            set linenum [expr $expect_out(2,string) + 1];
            set breakplace "${file}:${linenum}";
        }
        default {}
    }
    send_gdb "break ${breakplace}\n";
    gdb_expect 60 {
        -re "Breakpoint (\[0-9\]+) at.*$gdb_prompt" {
            set breakpoint $expect_out(1,string);
        }
        -re "Breakpoint (\[0-9\]+): file.*$gdb_prompt" {
            set breakpoint $expect_out(1,string);
        }
        default {}
    }
    send_gdb "continue\n";
    gdb_expect 60 {
        -re "Breakpoint ${breakpoint},.*$gdb_prompt" {
            gdb_test "delete $breakpoint" ".*" "";
            return;
        }
        default {}
    }
}

### gdb_get_line_number TEXT [FILE]
###
### Search the source file FILE, and return the line number of a line
### containing TEXT.  Use this function instead of hard-coding line
### numbers into your test script.
###
### Specifically, this function uses GDB's "search" command to search
### FILE for the first line containing TEXT, and returns its line
### number.  Thus, FILE must be a source file, compiled into the
### executable you are running.  If omitted, FILE defaults to the
### value of the global variable `srcfile'; most test scripts set
### `srcfile' appropriately at the top anyway.
###
### Use this function to keep your test scripts independent of the
### exact line numbering of the source file.  Don't write:
### 
###   send_gdb "break 20"
### 
### This means that if anyone ever edits your test's source file, 
### your test could break.  Instead, put a comment like this on the
### source file line you want to break at:
### 
###   /* breakpoint spot: frotz.exp: test name */
### 
### and then write, in your test script (which we assume is named
### frotz.exp):
### 
###   send_gdb "break [gdb_get_line_number "frotz.exp: test name"]\n"
###
### (Yes, Tcl knows how to handle the nested quotes and brackets.
### Try this:
###     $ tclsh
###     % puts "foo [lindex "bar baz" 1]"
###     foo baz
###     % 
### Tcl is quite clever, for a little stringy language.)

proc gdb_get_line_number {text {file /omitted/}} {
    global gdb_prompt;
    global srcfile;

    if {! [string compare $file /omitted/]} {
        set file $srcfile
    }

    set result -1;
    gdb_test "list ${file}:1,1" ".*" ""
    send_gdb "search ${text}\n"
    gdb_expect {
        -re "\[\r\n\]+(\[0-9\]+)\[ \t\].*${text}.*$gdb_prompt $" {
            set result $expect_out(1,string)
        }
        -re ".*$gdb_prompt $" {
            fail "find line number containing \"${text}\""
        }
        timeout {
            fail "find line number containing \"${text}\" (timeout)"
        }
    }
    return $result;
}

# gdb_continue_to_end:
#       The case where the target uses stubs has to be handled specially. If a
#       stub is used, we set a breakpoint at exit because we cannot rely on
#       exit() behavior of a remote target.
# 
# mssg is the error message that gets printed.

proc gdb_continue_to_end {mssg} {
  if [target_info exists use_gdb_stub] {
    if {![gdb_breakpoint "exit"]} {
      return 0
    }
    gdb_test "continue" "Continuing..*Breakpoint .*exit.*" \
      "continue until exit at $mssg"
  } else {
    # Continue until we exit.  Should not stop again.
    # Don't bother to check the output of the program, that may be
    # extremely tough for some remote systems.
    gdb_test "continue"\
      "Continuing.\[\r\n0-9\]+(... EXIT code 0\[\r\n\]+|)Program exited normally\\..*"\
      "continue until exit at $mssg"
  }
}

proc rerun_to_main {} {
  global gdb_prompt

  if [target_info exists use_gdb_stub] {
    gdb_run_cmd
    gdb_expect {
      -re ".*Breakpoint .*main .*$gdb_prompt $"\
              {pass "rerun to main" ; return 0}
      -re "$gdb_prompt $"\
              {fail "rerun to main" ; return 0}
      timeout {fail "(timeout) rerun to main" ; return 0}
    }
  } else {
    send_gdb "run\n"
    gdb_expect {
      -re "Starting program.*$gdb_prompt $"\
              {pass "rerun to main" ; return 0}
      -re "$gdb_prompt $"\
              {fail "rerun to main" ; return 0}
      timeout {fail "(timeout) rerun to main" ; return 0}
    }
  }
}

# Print a message and return true if a test should be skipped
# due to lack of floating point suport.

proc gdb_skip_float_test { msg } {
    if [target_info exists gdb,skip_float_tests] {
        verbose "Skipping test '$msg': no float tests.";
        return 1;
    }
    return 0;
}

# Print a message and return true if a test should be skipped
# due to lack of stdio support.

proc gdb_skip_stdio_test { msg } {
    if [target_info exists gdb,noinferiorio] {
        verbose "Skipping test '$msg': no inferior i/o.";
        return 1;
    }
    return 0;
}

proc gdb_skip_bogus_test { msg } {
    return 0;
}