# Copyright 2002-2013 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/>.

# This file was written by Joel Brobecker. (brobecker@gnat.com), derived
# from selftest.exp, written by Rob Savoye.


# are we on a target board
if { [is_remote target] || ![isnative] } then {
    return
}

proc setup_test { executable } {
    global gdb_prompt
    global timeout
    global INTERNAL_GDBFLAGS

    # load yourself into the debugger
    # This can take a relatively long time, particularly for testing where
    # the executable is being accessed over a network, or where gdb does not
    # support partial symbols for a particular target and has to load the
    # entire symbol table.  Set the timeout to 10 minutes, which should be
    # adequate for most environments (it *has* timed out with 5 min on a
    # SPARCstation SLC under moderate load, so this isn't unreasonable).
    # After gdb is started, set the timeout to 30 seconds for the duration
    # of this test, and then back to the original value.

    set oldtimeout $timeout
    set timeout 600
    verbose "Timeout is now $timeout seconds" 2

    global gdb_file_cmd_debug_info
    set gdb_file_cmd_debug_info "unset"

    set result [gdb_load $executable]
    set timeout $oldtimeout
    verbose "Timeout is now $timeout seconds" 2

    if { $result != 0 } then {
	return -1
    }

    if { $gdb_file_cmd_debug_info != "debug" } then {
	untested "No debug information, skipping testcase."
	return -1
    }

    # Set a breakpoint at main
    gdb_test "break captured_main" \
            "Breakpoint.*at.* file.*, line.*" \
            "breakpoint in captured_main"

    # run yourself
    # It may take a very long time for the inferior gdb to start (lynx),
    # so we bump it back up for the duration of this command.
    set timeout 600

    set description "run until breakpoint at captured_main"
    gdb_test_multiple "run $INTERNAL_GDBFLAGS" "$description" {
        -re "Starting program.*Breakpoint \[0-9\]+,.*captured_main .data.* at .*main.c:.*$gdb_prompt $" {
            pass "$description"
        }
        -re "Starting program.*Breakpoint \[0-9\]+,.*captured_main .data.*$gdb_prompt $" {
            xfail "$description (line numbers scrambled?)"
        }
        -re "vfork: No more processes.*$gdb_prompt $" {
            fail "$description (out of virtual memory)"
            set timeout $oldtimeout
            verbose "Timeout is now $timeout seconds" 2
            return -1
        }
        -re ".*$gdb_prompt $" {
            fail "$description"
            set timeout $oldtimeout
            verbose "Timeout is now $timeout seconds" 2
            return -1
        }
    }

    set timeout $oldtimeout
    verbose "Timeout is now $timeout seconds" 2

    return 0
}

proc test_with_self { executable } {

    set setup_result [setup_test $executable]
    if {$setup_result <0} then {
        return -1
    }

    # A file which contains a directory prefix
    gdb_test "print gdb_realpath (\"./xfullpath.exp\")" \
             ".\[0-9\]+ =.*\".*/xfullpath.exp\"" \
             "A filename with ./ as the directory prefix"

    # A file which contains a directory prefix
    gdb_test "print gdb_realpath (\"../../defs.h\")" \
             ".\[0-9\]+ =.*\".*/defs.h\"" \
             "A filename with ../ in the directory prefix"

    # A one-character filename
    gdb_test "print gdb_realpath (\"./a\")" \
             ".\[0-9\]+ =.*\".*/a\"" \
             "A one-char filename in the current directory"
          
    # A file in the root directory
    gdb_test "print gdb_realpath (\"/root_file_which_should_exist\")" \
             ".\[0-9\]+ =.*\"/root_file_which_should_exist\"" \
             "A filename in the root directory"
          
    # A file which does not have a directory prefix
    gdb_test "print gdb_realpath (\"xfullpath.exp\")" \
             ".\[0-9\]+ =.*\"xfullpath.exp\"" \
             "A filename without any directory prefix"

    # A one-char filename without any directory prefix
    gdb_test "print gdb_realpath (\"a\")" \
             ".\[0-9\]+ =.*\"a\"" \
             "A one-char filename without any directory prefix"

    # An empty filename
    gdb_test "print gdb_realpath (\"\")" \
             ".\[0-9\]+ =.*\"\"" \
             "An empty filename"

    return 0
}

# Find a pathname to a file that we would execute if the shell was asked
# to run $arg using the current PATH.

proc find_gdb { arg } {

    # If the arg directly specifies an existing executable file, then
    # simply use it.

    if [file executable $arg] then {
	return $arg
    }

    set result [which $arg]
    if [string match "/" [ string range $result 0 0 ]] then {
	return $result
    }

    # If everything fails, just return the unqualified pathname as default
    # and hope for best.

    return $arg
}

# Run the test with self.
# Copy the file executable file in case this OS doesn't like to edit its own
# text space.

set GDB_FULLPATH [find_gdb $GDB]

# Remove any old copy lying around.
remote_file host delete x$tool

gdb_start
set file [remote_download host $GDB_FULLPATH x$tool]
set result [test_with_self $file];
gdb_exit;
catch "remote_file host delete $file";

if {$result <0} then {
    warning "Couldn't test self"
    return -1
}