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#   Copyright (C) 2009, 2011 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 GCC; see the file COPYING3.  If not see

# .

# Utility for testing variable values using gdb, invoked via dg-final.

# Call pass if variable has the desired value, otherwise fail.

#

# Argument 0 is the line number on which to put a breakpoint

# Argument 1 is the name of the variable to be checked

# Argument 2 is the expected value of the variable

# Argument 3 handles expected failures and the like

proc gdb-test { args } {

    if { ![isnative] || [is_remote target] } { return }

    if { [llength $args] >= 4 } {

        switch [dg-process-target [lindex $args 3]] {

            "S" { }

            "N" { return }

            "F" { setup_xfail "*-*-*" }

            "P" { }

        }

    }

    # This assumes that we are three frames down from dg-test, and that

    # it still stores the filename of the testcase in a local variable "name".

    # A cleaner solution would require a new DejaGnu release.

    upvar 2 name testcase

    upvar 2 prog prog

    set gdb_name $::env(GUALITY_GDB_NAME)

    set testname "$testcase line [lindex $args 0] [lindex $args 1] == [lindex $args 2]"

    set output_file "[file rootname [file tail $prog]].exe"

    set cmd_file "[file rootname [file tail $prog]].gdb"

    set fd [open $cmd_file "w"]

    puts $fd "break [lindex $args 0]"

    puts $fd "run"

    puts $fd "print [lindex $args 1]"

    puts $fd "print [lindex $args 2]"

    puts $fd "quit"

    close $fd

    send_log "Spawning: $gdb_name -nx -nw -quiet -x $cmd_file ./$output_file\n"

    set res [remote_spawn target "$gdb_name -nx -nw -quiet -x $cmd_file ./$output_file"]

    if { $res < 0 || $res == "" } {

        unsupported "$testname"

        file delete $cmd_file

        return

    }

    remote_expect target [timeout_value] {

        # Too old GDB

        -re "Unhandled dwarf expression|Error in sourced command file" {

            unsupported "$testname"

            remote_close target

            file delete $cmd_file

            return

        }

        -re {[\n\r]\$1 = ([^\n\r]*)[\n\r]+\$2 = ([^\n\r]*)[\n\r]} {

            set first $expect_out(1,string)

            set second $expect_out(2,string)

            if { $first == $second } {

                pass "$testname"

            } else {

                send_log "$first != $second\n"

                fail "$testname"

            }

            remote_close target

            file delete $cmd_file

            return

        }

        timeout {

            unsupported "$testname"

            remote_close target

            file delete $cmd_file

            return

        }

    }

    unsupported "$testname"

    remote_close target

    file delete $cmd_file

    return

}