# Copyright (C) 2014-2020 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/>.

# A collection of tests related to pagination resulting from running
# execution commands directly from the command line, with "-ex".

standard_testfile

if {[build_executable "failed to prepare" $testfile $srcfile debug] == -1} {
    return -1
}

set file_arg $binfile
if [is_remote host] {
  set file_arg [remote_download host $file_arg]
}

global GDBFLAGS
set saved_gdbflags $GDBFLAGS

# Returns true if the board can 'gdb -ex "start"', false otherwise.

proc probe_can_run_cmdline  {} {
    global srcfile file_arg
    global saved_gdbflags GDBFLAGS
    global gdb_prompt

    set GDBFLAGS $saved_gdbflags
    append GDBFLAGS " -ex \"set height 0\""
    append GDBFLAGS " -ex \"start\""
    append GDBFLAGS " --args \"$file_arg\""

    with_test_prefix "probe support" {
	set test "run to main"

	gdb_exit
	set res [gdb_spawn]
	if { $res != 0} {
	    fail $test
	    return -1
	}

	set res -1
	gdb_test_multiple "" $test {
	    -re "main .* at .*$srcfile.*$gdb_prompt $" {
		set res 1
		pass $test
	    }
	    -re "Don't know how to run.*$gdb_prompt $" {
		set res 0
		unsupported $test
	    }
	}

	# In case the board file wants to send further commands.
	gdb_test_no_output "set height unlimited"
	return $res
    }
}

# Check that we handle pagination correctly when it triggers due to an
# execution command entered directly on the command line.

proc test_fg_execution_pagination_return {} {
    global file_arg
    global saved_gdbflags GDBFLAGS
    global gdb_prompt pagination_prompt

    set GDBFLAGS $saved_gdbflags
    append GDBFLAGS " -ex \"set height 2\""
    append GDBFLAGS " -ex \"start\""
    append GDBFLAGS " --args \"$file_arg\""

    with_test_prefix "return" {
	set test "run to pagination"

	gdb_exit
	set res [gdb_spawn]
	if { $res != 0} {
	    fail $test
	    return $res
	}
	gdb_test_multiple "" $test {
	    -re "$pagination_prompt$" {
		pass $test
	    }
	    -re "$gdb_prompt $" {
		fail $test
	    }
	}

	send_gdb "\n"

	set saw_pagination_prompt 0
	set test "send \\n to GDB"
	gdb_test_multiple "" $test {
	    -re "$pagination_prompt$" {
		set saw_pagination_prompt 1
		send_gdb "\n"
		exp_continue
	    }
	    -re "$gdb_prompt $" {
		gdb_assert $saw_pagination_prompt $test
	    }
	}

	gdb_test "p 1" " = 1" "GDB accepts further input"

	# In case the board file wants to send further commands.
	gdb_test_no_output "set height unlimited"
    }
}

# Check that we handle canceling pagination correctly when it triggers
# due to an execution command entered directly on the command line.

proc test_fg_execution_pagination_cancel { how } {
    global file_arg
    global saved_gdbflags GDBFLAGS
    global gdb_prompt pagination_prompt

    set GDBFLAGS $saved_gdbflags

    append GDBFLAGS " -ex \"set height 2\""
    append GDBFLAGS " -ex \"start\""
    append GDBFLAGS " --args \"$file_arg\""

    with_test_prefix "cancel with $how" {
	set test "run to pagination"

	gdb_exit
	set res [gdb_spawn]
	if { $res != 0} {
	    fail $test
	    return $res
	}
	gdb_test_multiple "" $test {
	    -re "$pagination_prompt$" {
		pass $test
	    }
	}

	set test "cancel pagination"
	if { $how == "ctrl-c" } {
	    send_gdb "\003"
	} else {
	    send_gdb "q\n"

	}
	gdb_test_multiple "" $test {
	    -re "Quit\r\n$gdb_prompt $" {
		pass $test
	    }
	}

	gdb_test "p 1" " = 1" "GDB accepts further input"

	# In case the board file wants to send further commands.
	gdb_test_no_output "set height unlimited"
    }
}

if {[probe_can_run_cmdline] > 0} {
    test_fg_execution_pagination_return
    if ![target_info exists gdb,nointerrupts] {
       test_fg_execution_pagination_cancel "ctrl-c"
    }
    test_fg_execution_pagination_cancel "quit"
}

set GDBFLAGS $saved_gdbflags