# Copyright 2016-2021 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 test checks that the "thread", "select-frame", "frame" and "inferior"
# CLI commands, as well as the "-thread-select" and "-stack-select-frame" MI
# commands send the appropriate user-selection-change events to all UIs.
#
# This test considers the case where console and MI are two different UIs,
# and MI is created with the new-ui command.
#
# It also considers the case where the console commands are sent directly in
# the MI channel as described in PR 20487.
#
# It does so by starting 2 inferiors with 3 threads each.
# - Thread 1 of each inferior is the main thread, starting the others.
# - Thread 2 of each inferior is stopped at /* thread loop line */.
# - Thread 3 of each inferior is either stopped at /* thread loop line */, if we
#   are using all-stop, or running, if we are using non-stop.

# Do not run if gdb debug is enabled as it doesn't work for separate-mi-tty.
if [gdb_debug_enabled] {
    untested "debug is enabled"
    return 0
}

load_lib mi-support.exp

standard_testfile

# Multiple inferiors are needed, therefore only native gdb and extended
# gdbserver modes are supported.
if [use_gdb_stub] {
    untested "using gdb stub"
    return
}

set compile_options "debug pthreads"
if {[build_executable $testfile.exp $testfile ${srcfile} ${compile_options}] == -1} {
    untested "failed to compile"
    return -1
}

set main_break_line [gdb_get_line_number "main break line"]
set thread_loop_line [gdb_get_line_number "thread loop line"]
set thread_caller_line [gdb_get_line_number "thread caller line"]

# Return whether we expect thread THREAD to be running in mode MODE.
#
# MODE can be either "all-stop" or "non-stop".
# THREAD can be either a CLI thread id (e.g. 2.3) or an MI thread id (e.g. 6).

proc thread_is_running { mode thread } {
    if { $mode != "non-stop" } {
	return 0
    }

    return [expr {
	$thread == 1.3
	|| $thread == 2.3
	|| $thread == 3
	|| $thread == 6
    }]
}

# Make a regular expression to match the various inferior/thread/frame selection
# events for CLI.
#
# MODE can be either "all-stop" or "non-stop", indicating which one is currently
#   in use.
# INF is the inferior number we are expecting GDB to switch to, or -1 if we are
#   not expecting GDB to announce an inferior switch.
# THREAD is the thread number we are expecting GDB to switch to, or -1 if we are
#   not expecting GDB to announce a thread switch.
# FRAME is the frame number we are expecting GDB to switch to, or -1 if we are
#   not expecting GDB to announce a frame switch.  See the FRAME_RE variable for
#   details.

proc make_cli_re { mode inf thread frame } {
    global srcfile
    global thread_caller_line
    global thread_loop_line
    global main_break_line
    global decimal

    set any "\[^\r\n\]*"

    set cli_re ""

    set inf_re "\\\[Switching to inferior $inf${any}\\\]"
    set all_stop_thread_re "\\\[Switching to thread [string_to_regexp $thread]${any}\\\]"

    set frame_re(0) "#0${any}child_sub_function$any$srcfile:$thread_loop_line\r\n${any}thread loop line \\\*/"
    set frame_re(1) "#1${any}child_function \\\(args=0x0\\\) at ${any}$srcfile:$thread_caller_line\r\n$thread_caller_line${any}/\\\* thread caller line \\\*/"

    # Special frame for main thread.
    set frame_re(2) "#0${any}\r\n${main_break_line}${any}"

    if { $inf != -1 } {
	append cli_re $inf_re
    }

    if { $thread != -1 } {
	if { $inf != -1 } {
	    append cli_re "\r\n"
	}
	set thread_re $all_stop_thread_re

	if [thread_is_running $mode $thread] {
	    set thread_re "$thread_re\\\(running\\\)"
	}

	append cli_re $thread_re
    }

    if { $frame != -1 } {
	if { $thread != -1 } {
	    append cli_re "\r\n"
	}
	append cli_re $frame_re($frame)
    }

    return $cli_re
}

# Make a regular expression to match the various inferior/thread/frame selection
# events for MI.
#
# MODE can be either "all-stop" or "non-stop", indicating which one is currently
#   in use.
# THREAD is the thread number we are expecting GDB to switch to, or -1 if we are
#   not expecting GDB to announce a thread switch.
# If EVENT is 1, build a regex for an "=thread-selected" async event.
#   Otherwise, build a regex for a response to a command.
# FRAME is the frame number we are expecting GDB to switch to, or -1 if we are
#   not expecting GDB to announce a frame switch.  See the FRAME_RE variable for
#   details.

proc make_mi_re { mode thread frame type } {
    global srcfile
    global hex
    global decimal
    global thread_loop_line
    global main_break_line
    global thread_caller_line

    set any "\[^\r\n\]*"

    set mi_re ""

    set thread_event_re "=thread-selected,id=\"$thread\""
    set thread_answer_re "\\^done,new-thread-id=\"$thread\""

    set frame_re(0) ",frame=\{level=\"0\",addr=\"$hex\",func=\"child_sub_function\",args=\\\[\\\],file=\"${any}${srcfile}\",fullname=\"${any}${srcfile}\",line=\"$thread_loop_line\",arch=\"$any\"\}"
    set frame_re(1) ",frame=\{level=\"1\",addr=\"$hex\",func=\"child_function\",args=\\\[\{name=\"args\",value=\"0x0\"\}\\\],file=\"${any}${srcfile}\",fullname=\"${any}${srcfile}\",line=\"$thread_caller_line\",arch=\"$any\"\}"

    # Special frame for main thread.
    set frame_re(2) ",frame=\{level=\"0\",addr=\"$hex\",func=\"main\",args=\\\[\\\],file=\"${any}${srcfile}\",fullname=\"${any}${srcfile}\",line=\"${main_break_line}\",arch=\"$any\"\}"

    if { $thread != -1 } {
	if { $type == "event" } {
	    append mi_re $thread_event_re
	} elseif { $type == "response" } {
	    append mi_re $thread_answer_re
	} else {
	    error "Invalid value for EVENT."
	}
    }

    if { $frame != -1 } {
	append mi_re $frame_re($frame)
    }

    if { $type == "event" } {
	append mi_re "\r\n"
    }

    return $mi_re
}

# Make a regular expression to match the various inferior/thread/frame selection
# events when issuing CLI commands inside MI.
#
# COMMAND is the CLI command that was sent to GDB, which will be output in the
#   console output stream.
# CLI_IN_MI_MODE indicates which method of CLI-in-MI command is used.  It can be
#   either "direct" of "interpreter-exec".
# MODE can be either "all-stop" or "non-stop", indicating which one is currently
#   in use.
# If EVENT is 1, expect a =thread-select MI event.
# INF is the inferior number we are expecting GDB to switch to, or -1 if we are
#   not expecting GDB to announce an inferior switch.
# CLI_THREAD is the thread number as seen in the CLI (inferior-qualified) we are
#   expecting GDB to switch to, or -1 if we are not expecting GDB to announce a
#   thread switch.
# MI_THREAD is the thread number as seen in the MI (global number) we are
#   expecting GDB to switch to, or -1 if we are not expecting GDB to announce a
#   thread switch.
# FRAME is the frame number we are expecting GDB to switch to, or -1 if we are
#   not expecting GDB to announce a frame switch.  See the FRAME_RE variable for
#   details.

proc make_cli_in_mi_re { command cli_in_mi_mode mode event inf cli_thread
		         mi_thread frame  } {
    global srcfile
    global thread_loop_line
    global main_break_line
    global thread_caller_line

    set any "\[^\r\n\]*"

    set command_re [string_to_regexp $command]
    set cli_in_mi_re "$command_re\r\n"

    if { $cli_in_mi_mode == "direct" } {
	append cli_in_mi_re "&\"$command_re\\\\n\"\r\n"
    }

    set frame_re(0) "~\"#0${any}child_sub_function${any}$srcfile:$thread_loop_line\\\\n\"\r\n~\"${thread_loop_line}${any}thread loop line \\\*/\\\\n\"\r\n"
    set frame_re(1) "~\"#1${any}child_function \\\(args=0x0\\\) at ${any}$srcfile:$thread_caller_line\\\\n\"\r\n~\"$thread_caller_line${any}thread caller line \\\*/\\\\n\"\r\n"

    # Special frame for main thread.
    set frame_re(2) "~\"#0${any}main${any}\\\\n\"\r\n~\"${main_break_line}${any}\"\r\n"

    if { $inf != -1 } {
	append cli_in_mi_re "~\""
	append cli_in_mi_re [make_cli_re $mode $inf -1 -1]
	append cli_in_mi_re "\\\\n\"\r\n"
    }

    if { $cli_thread != "-1" } {
	append cli_in_mi_re "~\""
	append cli_in_mi_re [make_cli_re $mode -1 $cli_thread -1]
	append cli_in_mi_re "\\\\n\"\r\n"
    }

    if { $frame != -1 } {
	append cli_in_mi_re $frame_re($frame)
    }

    if { $event == 1 } {
	append cli_in_mi_re [make_mi_re $mode $mi_thread $frame event]
    }

    append cli_in_mi_re "\\^done"

    return $cli_in_mi_re
}

# Return the current value of the "scheduler-locking" parameter.

proc show_scheduler_locking { } {
    global gdb_prompt
    global expect_out

    set any "\[^\r\n\]*"

    set test "show scheduler-locking"
    gdb_test_multiple $test $test {
	-re ".*Mode for locking scheduler during execution is \"(${any})\".\r\n$gdb_prompt " {
	    pass $test
	    return $expect_out(1,string)
	}
    }

    error "Couldn't get current scheduler-locking value."
}

# Prepare inferior INF so it is in the state we expect (see comment at the top).

proc test_continue_to_start { mode inf } {
    global gdb_spawn_id
    global mi_spawn_id
    global gdb_main_spawn_id
    global srcfile
    global main_break_line
    global thread_loop_line
    global decimal
    global gdb_prompt

    set any "\[^\r\n\]*"

    if { $gdb_spawn_id != $gdb_main_spawn_id } {
	error "This should not happen."
    }

    with_test_prefix "inferior $inf" {
	with_spawn_id $gdb_main_spawn_id {
	    # Continue to the point where we know for sure the threads are
	    # started.
	    gdb_test "tbreak $srcfile:$main_break_line" \
		"Temporary breakpoint ${any}" \
		"set breakpoint in main"

	    gdb_continue_to_breakpoint "main breakpoint"

	    # Consume MI event output.
	    with_spawn_id $mi_spawn_id {
		mi_expect_stop "breakpoint-hit" "main" "" "$srcfile" \
		    "$decimal" {"" "disp=\"del\""} "stop at breakpoint in main"
	    }

	    if { $mode == "all-stop" } {
		set previous_schedlock_val [show_scheduler_locking]

		# Set scheduler-locking on, so that we can control threads
		# independently.
		gdb_test_no_output "set scheduler-locking on"

		# Continue each child thread to the point we want them to be.
		foreach thread { 2 3 } {
		    gdb_test "thread $inf.$thread" ".*" "select child thread $inf.$thread"

		    gdb_test "tbreak $srcfile:$thread_loop_line" \
			"Temporary breakpoint ${any}" \
			"set breakpoint for thread $inf.$thread"

		    gdb_continue_to_breakpoint "continue thread $inf.$thread to infinite loop breakpoint"

		    # Consume MI output.
		    with_spawn_id $mi_spawn_id {
			mi_expect_stop "breakpoint-hit" "child_sub_function" \
			    "" "$srcfile" "$decimal" {"" "disp=\"del\""} \
			    "thread $inf.$thread stops MI"
		    }
		}

		# Restore scheduler-locking to its original value.
		gdb_test_no_output "set scheduler-locking $previous_schedlock_val"
	    } else { # $mode == "non-stop"
		# Put a thread-specific breakpoint for thread 2 of the current
		# inferior.  We don't put a breakpoint for thread 3, since we
		# want to let it run.
		set test "set thread-specific breakpoint, thread $inf.2"
		gdb_test_multiple "tbreak $srcfile:$thread_loop_line thread $inf.2" $test {
		    -re "Temporary breakpoint ${any}\r\n$gdb_prompt " {
			pass $test
		    }
		}

		# Confirm the stop of thread $inf.2.
		set test "thread $inf.2 stops CLI"
		gdb_test_multiple "" $test {
		    -re "Thread $inf.2 ${any} hit Temporary breakpoint ${any}\r\n$thread_loop_line${any}\r\n" {
			pass $test
		    }
		}

		# Consume MI output.
		with_spawn_id $mi_spawn_id {
		    mi_expect_stop "breakpoint-hit" "child_sub_function" \
			"" "$srcfile" "$decimal" {"" "disp=\"del\""} \
			"thread $inf.2 stops MI"
		}
	    }
	}
    }
}

# Prepare the test environment.
#
# MODE can be either "all-stop" or "non-stop".

proc_with_prefix test_setup { mode } {
    global srcfile
    global srcdir
    global subdir
    global gdb_main_spawn_id
    global mi_spawn_id
    global decimal
    global binfile
    global GDBFLAGS
    global async

    set any "\[^\r\n\]*"

    mi_gdb_exit

    save_vars { GDBFLAGS } {
	if { $mode == "non-stop" } {
	    set GDBFLAGS [concat $GDBFLAGS " -ex \"set non-stop 1\""]
	}

	if { [mi_gdb_start "separate-mi-tty"] != 0 } {
	    return
	}
    }

    mi_delete_breakpoints
    mi_gdb_reinitialize_dir $srcdir/$subdir
    mi_gdb_load $binfile

    if { [mi_runto_main] < 0 } {
	return
    }

    # When using mi_expect_stop, we don't expect a prompt after the *stopped
    # event, since the blocking commands are done from the CLI.  Setting async
    # to 1 makes it not expect the prompt.
    set async 1

    with_spawn_id $gdb_main_spawn_id {
	# Add the second inferior now.  While this is not mandatory, it allows
	# us to assume that per-inferior thread numbering will be used,
	# simplifying test_continue_to_start a bit (Thread 1.2 and not Thread 2).
	gdb_test "add-inferior" "Added inferior 2 on connection .*" "add inferior 2"

	# Prepare the first inferior for the test.
	test_continue_to_start $mode 1

	# Switch to and start the second inferior.
	gdb_test "inferior 2" "\\\[Switching to inferior 2${any}\\\]" "switch to inferior 2"
	gdb_load ${binfile}

	# Doing "start" on the CLI generates a ton of MI output.  At some point,
	# if we don't consume/match it, the buffer between GDB's MI channel and
	# Expect will get full, GDB will block on a write system call and we'll
	# deadlock, waiting for CLI output that will never arrive.  And then
	# we're sad.  So instead of using gdb_test and expect CLI output, send
	# the start command first, then consume MI output, and finally consume
	# CLI output.
	send_gdb "start\n"

	with_spawn_id $mi_spawn_id {
	    mi_expect_stop "breakpoint-hit" "main" "" "$srcfile" "$decimal" \
		{"" "disp=\"del\""} "main stop"
	}

	# Consume CLI output.
	gdb_test "" "Temporary breakpoint.*Starting program.*"

	# Prepare the second inferior for the test.
	test_continue_to_start $mode 2
    }
}

# Reset the selection to frame #0 of thread THREAD.

proc reset_selection { thread } {
    global gdb_main_spawn_id

    set any "\[^\r\n\]*"

    with_spawn_id $gdb_main_spawn_id {
	gdb_test "thread $thread" \
	    "\\\[Switching to thread $thread ${any}\\\].*" \
	    "reset selection to thread $thread"
	gdb_test "frame 0" ".*" "reset selection to frame 0"
    }
}

# Flush Expect's internal buffers for both CLI and MI.
#
# The idea here is to send a command, and to consume all the characters that we
# expect that command to output, including the following prompt.  Using gdb_test
# and mi_gdb_test should do that.

proc flush_buffers { } {
    global gdb_main_spawn_id mi_spawn_id

    with_spawn_id $gdb_main_spawn_id {
	gdb_test "print 444" "= 444" "flush CLI"
    }

    with_spawn_id $mi_spawn_id {
	mi_gdb_test "555-data-evaluate-expression 666" ".*done,value=\"666\"" "flush MI"
    }
}

# Run a command on the current spawn id, to confirm that no output is pending
# in Expect's internal buffer.  This is used to ensure that nothing was output
# on the spawn id since the call to gdb_test/mi_gdb_test/flush_buffers.
#
# The key here is that the regexes use start-of-buffer anchors (^), ensuring
# that they match the entire buffer, confirming that there was nothing in it
# before.

proc ensure_no_output { test } {
    global gdb_spawn_id gdb_main_spawn_id mi_spawn_id
    global decimal

    if { $gdb_spawn_id == $gdb_main_spawn_id } {
	# CLI
	gdb_test "print 666" \
		 "^print 666\r\n\\\$$decimal = 666" \
		 "$test, ensure no output CLI"
    } elseif { $gdb_spawn_id == $mi_spawn_id } {
	# MI
	mi_gdb_test "777-data-evaluate-expression 888" \
		    "^777-data-evaluate-expression 888\r\n777\\^done,value=\"888\"" \
		    "$test, ensure no output MI"
    } else {
	error "Unexpected gdb_spawn_id value."
    }
}

# Match a regular expression, or ensure that there was no output.
#
# If RE is non-empty, try to match the content of the program output (using the
# current spawn_id) and pass/fail TEST accordingly.
# If RE is empty, ensure that the program did not output anything.

proc match_re_or_ensure_not_output { re test } {
    if { $re != "" } {
	gdb_expect {
	    -re "$re" {
		pass $test
	    }

	    default {
		fail $test
	    }
	}
    } else {
	ensure_no_output $test
    }
}

# Test selecting an inferior from CLI.

proc_with_prefix test_cli_inferior { mode } {
    global gdb_main_spawn_id mi_spawn_id

    reset_selection "1.1"

    set mi_re [make_mi_re $mode 4 2 event]
    set cli_re [make_cli_re $mode 2 2.1 2]

    flush_buffers

    # Do the 'inferior' command.
    with_spawn_id $gdb_main_spawn_id {
	gdb_test "inferior 2" $cli_re "CLI select inferior"
    }

    with_spawn_id $mi_spawn_id {
	match_re_or_ensure_not_output $mi_re "event on MI"
    }

    # Do the 'inferior' command on the currently selected inferior.  For now,
    # GDB naively re-outputs everything.
    with_spawn_id $gdb_main_spawn_id {
	gdb_test "inferior 2" $cli_re "CLI select inferior again"
    }

    with_spawn_id $mi_spawn_id {
	match_re_or_ensure_not_output $mi_re "event on MI again"
    }
}

# Test thread selection from CLI.

proc_with_prefix test_cli_thread { mode } {
    global gdb_main_spawn_id
    global mi_spawn_id

    set any "\[^\r\n\]*"

    reset_selection "1.1"
    flush_buffers

    with_test_prefix "thread 1.2" {
	# Do the 'thread' command to select a stopped thread.

	set mi_re [make_mi_re $mode 2 0 event]
	set cli_re [make_cli_re $mode -1 1.2 0]

	with_spawn_id $gdb_main_spawn_id {
	    gdb_test "thread 1.2" $cli_re "select thread"
	}

	with_spawn_id $mi_spawn_id {
	    match_re_or_ensure_not_output $mi_re "select thread, event on MI "
	}

	# Do the 'thread' command to select the same thread.  We shouldn't receive
	# an event on MI, since we won't actually switch thread.

	set mi_re ""

	with_spawn_id $gdb_main_spawn_id {
	    gdb_test "thread 1.2" $cli_re "select thread again"
	}

	with_spawn_id $mi_spawn_id {
	    match_re_or_ensure_not_output $mi_re "select thread, event on MI again"
	}

	# Try the 'thread' command without arguments.

	set cli_re "\\\[Current thread is 1\\.2.*\\\]"
	set mi_re ""

	with_spawn_id $gdb_main_spawn_id {
	    gdb_test "thread" $cli_re "thread without args"
	}

	with_spawn_id $mi_spawn_id {
	    match_re_or_ensure_not_output $mi_re "thread without args, event on MI"
	}
    }

    with_test_prefix "thread 1.3" {
	# Do the 'thread' command to select the third thread, stopped on all-stop,
	# running on non-stop.

	if { $mode == "all-stop" } {
	    set cli_re [make_cli_re $mode -1 1.3 0]
	    set mi_re [make_mi_re $mode 3 0 event]
	} else {
	    set cli_re [make_cli_re $mode -1 1.3 -1]
	    set mi_re [make_mi_re $mode 3 -1 event]
	}

	with_spawn_id $gdb_main_spawn_id {
	    gdb_test "thread 1.3" $cli_re "select thread"
	}

	with_spawn_id $mi_spawn_id {
	    match_re_or_ensure_not_output $mi_re "select thread, event on MI"
	}

	# Do the 'thread' command to select the third thread again.  Again, we
	# shouldn't receive an event on MI.

	set mi_re ""

	with_spawn_id $gdb_main_spawn_id {
	    gdb_test "thread 1.3" $cli_re "select thread again"
	}

	with_spawn_id $mi_spawn_id {
	    match_re_or_ensure_not_output $mi_re "select thread again, event on MI"
	}

	# Try the 'thread' command without arguments.

	set cli_re "\\\[Current thread is 1\\.3 ${any}\\\]"
	set mi_re ""

	with_spawn_id $gdb_main_spawn_id {
	    gdb_test "thread" $cli_re "thread without args"
	}

	with_spawn_id $mi_spawn_id {
	    match_re_or_ensure_not_output $mi_re "thread without args, event on MI"
	}
    }

    # Idea for the future: selecting a thread in a different inferior.  For now,
    # GDB doesn't show an inferior switch, but if it did, it would be a nice
    # place to test it.
}

# Test frame selection from CLI.

proc_with_prefix test_cli_frame { mode } {
    global gdb_main_spawn_id mi_spawn_id

    with_test_prefix "thread 1.2" {
	reset_selection "1.2"
	flush_buffers

	# Do the 'frame' command to select frame 1.

	set mi_re [make_mi_re $mode 2 1 event]
	set cli_re [make_cli_re $mode -1 -1 1]

	with_spawn_id $gdb_main_spawn_id {
	    gdb_test "frame 1" $cli_re "select frame 1"
	}

	with_spawn_id $mi_spawn_id {
	    match_re_or_ensure_not_output $mi_re "select frame 1, event on MI"
	}

	# Do the 'frame' command to select the same frame.  This time we don't
	# expect an event on MI, since we won't actually change frame.

	set mi_re ""

	with_spawn_id $gdb_main_spawn_id {
	    gdb_test "frame 1" $cli_re "select frame 1 again"
	}

	with_spawn_id $mi_spawn_id {
	    match_re_or_ensure_not_output $mi_re "select frame 1 again, event on MI"
	}

	# Do the 'frame' command without arguments.  We shouldn't see anything on MI.

	with_spawn_id $gdb_main_spawn_id {
	    gdb_test "frame" $cli_re "frame without args"
	}

	with_spawn_id $mi_spawn_id {
	    match_re_or_ensure_not_output $mi_re "frame without args, event on MI"
	}
    }

    with_test_prefix "thread 1.3" {
	# Now, try the 'frame' command on thread 3, which is running if we are in
	# non-stop mode.
	reset_selection "1.3"
	flush_buffers

	if {$mode == "all-stop"} {
	    set mi_re [make_mi_re $mode 3 1 event]
	    set cli_re [make_cli_re $mode -1 -1 1]
	} elseif {$mode == "non-stop"} {
	    set mi_re ""
	    set cli_re "Selected thread is running\\."
	}

	with_spawn_id $gdb_main_spawn_id {
	    gdb_test "frame 1" $cli_re "select frame 1"
	}

	with_spawn_id $mi_spawn_id {
	    match_re_or_ensure_not_output $mi_re "select frame 1, event on MI"
	}

	# Do the 'frame' command without arguments.

	if { $mode == "non-stop" } {
	    set cli_re "No stack\\."
	}
	set mi_re ""

	with_spawn_id $gdb_main_spawn_id {
	    gdb_test "frame" $cli_re "frame without args"
	}

	with_spawn_id $mi_spawn_id {
	    match_re_or_ensure_not_output $mi_re "frame without args, event on MI"
	}
    }
}

# Test frame selection from CLI with the select-frame command.

proc_with_prefix test_cli_select_frame { mode } {
    global gdb_main_spawn_id mi_spawn_id expect_out

    with_test_prefix "thread 1.2" {
	reset_selection "1.2"
	flush_buffers

	# Do the 'select-frame' command to select frame 1.

	set mi_re [make_mi_re $mode 2 1 event]

	with_spawn_id $gdb_main_spawn_id {
	    gdb_test_no_output "select-frame 1" "select frame 1"
	}

	with_spawn_id $mi_spawn_id {
	    match_re_or_ensure_not_output $mi_re "select frame 1, event on MI"
	}

	# Do the 'select-frame' command to select the same frame.  This time we expect to
	# event on MI, since we won't actually change frame.

	set mi_re ""

	with_spawn_id $gdb_main_spawn_id {
	    gdb_test_no_output "select-frame 1" "select frame 1 again"
	}

	with_spawn_id $mi_spawn_id {
	    match_re_or_ensure_not_output $mi_re "select frame 1 again, event on MI"
	}
    }

    with_test_prefix "thread 1.3" {
	# Now, try the 'select-frame' command on thread 3, which is running if we are in
	# non-stop mode.
	reset_selection "1.3"
	flush_buffers

	if {$mode == "all-stop"} {
	    set mi_re [make_mi_re $mode 3 1 event]
	} elseif {$mode == "non-stop"} {
	    set mi-re ""
	    set cli_re "Selected thread is running\\."
	}

	with_spawn_id $gdb_main_spawn_id {
	    if { $mode == "all-stop" } {
		gdb_test_no_output "select-frame 1" "select frame 1"
	    } else {
		gdb_test "select-frame 1" $cli_re "select frame 1"
	    }
	}

	with_spawn_id $mi_spawn_id {
	    match_re_or_ensure_not_output $mi_re "select frame 1, event on MI"
	}
    }
}

# Test doing an up and then down command from CLI.

proc_with_prefix test_cli_up_down { mode } {
    global gdb_main_spawn_id mi_spawn_id

    reset_selection "1.2"
    flush_buffers

    # Try doing an 'up'.

    set mi_re [make_mi_re $mode 2 1 event]
    set cli_re [make_cli_re $mode -1 -1 1]

    with_spawn_id $gdb_main_spawn_id {
	gdb_test "up" $cli_re "frame up"
    }

    with_spawn_id $mi_spawn_id {
	match_re_or_ensure_not_output $mi_re "frame up, event on MI"
    }

    # Try doing a 'down'.

    set mi_re [make_mi_re $mode 2 0 event]
    set cli_re [make_cli_re $mode -1 -1 0]

    with_spawn_id $gdb_main_spawn_id {
	gdb_test "down" $cli_re "frame down"
    }

    with_spawn_id $mi_spawn_id {
	match_re_or_ensure_not_output $mi_re "frame down, event on MI"
    }
}

# Test selecting a thread from MI.

proc_with_prefix test_mi_thread_select { mode } {
    global gdb_main_spawn_id mi_spawn_id

    reset_selection "1.1"
    flush_buffers

    with_test_prefix "thread 1.2" {
	# Do the '-thread-select' command to select a stopped thread.

	set mi_re [make_mi_re $mode 2 0 response]
	set cli_re [make_cli_re $mode -1 1.2 0]

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test "-thread-select 2" $mi_re "-thread-select"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output "$cli_re\r\n" "-thread-select, event on CLI"
	}

	# Do the '-thread-select' command to select the same thread.  We
	# shouldn't receive an event on CLI, since we won't actually switch
	# thread.

	set cli_re ""

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test "-thread-select 2" $mi_re "-thread-select again"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output $cli_re "-thread-select again, event on CLI"
	}
    }

    with_test_prefix "thread 1.3" {
	# Do the '-thread-select' command to select the third thread, stopped on all-stop,
	# running on non-stop.

	if { $mode == "all-stop" } {
	    set mi_re [make_mi_re $mode 3 0 response]
	    set cli_re [make_cli_re $mode -1 1.3 0]
	} else {
	    set mi_re [make_mi_re $mode 3 -1 response]
	    set cli_re [make_cli_re $mode -1 1.3 -1]
	}

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test "-thread-select 3" $mi_re "-thread-select"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output "$cli_re\r\n" "-thread-select, event on CLI"
	}

	# Do the 'thread' command to select the third thread again.  Again, we
	# shouldn't receive an event on MI.

	set cli_re ""

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test "-thread-select 3" $mi_re "-thread-select again"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output $cli_re "-thread-select again, event on CLI"
	}
    }

    with_test_prefix "thread 1.2 with --thread" {
	# Test selecting a thread from MI with a --thread option.  This test
	# verifies that even if the thread GDB would switch to is the same has
	# the thread specified with --thread, an event is still sent to CLI.
	# In this case this is thread 1.2

	set mi_re [make_mi_re $mode 2 0 response]
	set cli_re [make_cli_re $mode -1 1.2 0]

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test "-thread-select --thread 2 2" $mi_re "-thread-select"
	}

	with_spawn_id $gdb_main_spawn_id {
	    # This doesn't work as of now, no event is sent on CLI.  It is
	    # commented out so we don't have to wait for the timeout every time.
	    # match_re_or_ensure_not_output "$cli_re\r\n" "-thread-select, event on cli"
	    kfail "gdb/20631" "thread-select, event on cli"
	}
    }

    # Idea for the future: selecting a thread in a different inferior.  For now,
    # GDB doesn't show an inferior switch, but if it did, it would be a nice
    # place to test it.
}

proc_with_prefix test_mi_stack_select_frame { mode } {
    global gdb_main_spawn_id mi_spawn_id

    with_test_prefix "thread 1.2" {
	reset_selection "1.2"
	flush_buffers

	# Do the '-stack-select-frame' command to select frame 1.

	set mi_re "\\^done"
	set cli_re [make_cli_re $mode -1 -1 1]

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test "-stack-select-frame 1" $mi_re "-stack-select-frame"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output "$cli_re\r\n" "-stack-select-frame, event on MI"
	}

	# Do the '-stack-select-frame' command to select the same frame.  This time we don't
	# expect an event on CLI, since we won't actually change frame.

	set cli_re ""

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test "-stack-select-frame 1" $mi_re "-stack-select-frame again"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output $cli_re "-stack-select-frame again, event on MI"
	}
    }

    with_test_prefix "thread 1.3" {
	# Now, try the '-stack-select-frame' command on thread 3, which is
	# running if we are in non-stop mode.
	reset_selection "1.3"
	flush_buffers

	if {$mode == "all-stop"} {
	    set mi_re "\\^done"
	    set cli_re [make_cli_re $mode -1 -1 1]
	    append cli_re "\r\n"
	} elseif {$mode == "non-stop"} {
	    set cli_re ""
	    set mi_re "\\^error,msg=\"Selected thread is running\\.\""
	}

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test "-stack-select-frame 1" $mi_re "-stack-select-frame"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output $cli_re "-stack-select-frame, event on MI"
	}
    }
}

proc make_cli_in_mi_command { cli_in_mi_mode command } {
    if { $cli_in_mi_mode == "direct" } {
	return $command
    } elseif { $cli_in_mi_mode == "interpreter-exec" } {
	return "-interpreter-exec console \"$command\""
    } else {
	error "Invalid value for CLI_IN_MI_MODE."
    }
}

# Test selecting the inferior using a CLI command in the MI channel.

proc_with_prefix test_cli_in_mi_inferior { mode cli_in_mi_mode } {
    global gdb_main_spawn_id mi_spawn_id

    reset_selection "1.1"
    flush_buffers

    set command [make_cli_in_mi_command $cli_in_mi_mode "inferior 2"]

    set mi_re [make_cli_in_mi_re $command $cli_in_mi_mode $mode 1 2 2.1 4 2]
    set cli_re [make_cli_re $mode 2 "2.1" 2]

    with_spawn_id $mi_spawn_id {
	mi_gdb_test $command $mi_re "select inferior"
    }

    with_spawn_id $gdb_main_spawn_id {
	match_re_or_ensure_not_output "$cli_re\r\n" "select inferior, event on CLI"
    }

    # Do the 'inferior' command on the currently selected inferior.  For now,
    # GDB naively re-outputs everything.
    with_spawn_id $mi_spawn_id {
	mi_gdb_test $command $mi_re "select inferior again"
    }

    with_spawn_id $gdb_main_spawn_id {
	match_re_or_ensure_not_output $cli_re "select inferior again, event on CLI"
    }
}

# Test selecting the thread using a CLI command in the MI channel.

proc_with_prefix test_cli_in_mi_thread { mode cli_in_mi_mode } {
    global gdb_main_spawn_id mi_spawn_id

    reset_selection "1.1"
    flush_buffers

    with_test_prefix "thread 1.2" {
	# Do the 'thread' command to select a stopped thread.

	set command [make_cli_in_mi_command $cli_in_mi_mode "thread 1.2"]
	set mi_re [make_cli_in_mi_re $command $cli_in_mi_mode $mode 1 -1 1.2 2 0]
	set cli_re [make_cli_re $mode -1 1.2 0]

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test $command $mi_re "select thread"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output "$cli_re\r\n" "select thread, event on CLI"
	}

	# Do the 'thread' command to select the same thread.  We shouldn't
	# receive an event on CLI, since we won't actually switch thread.

	set mi_re [make_cli_in_mi_re $command $cli_in_mi_mode $mode 0 -1 1.2 2 0]
	set cli_re ""

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test $command $mi_re "select thread again"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output $cli_re "select thread again, event on CLI"
	}

	# Try the 'thread' command without arguments.

	set command [make_cli_in_mi_command $cli_in_mi_mode "thread"]

	set mi_re "${command}.*~\"\\\[Current thread is 1\\.2.*\\\]\\\\n\".*\\^done"
	set cli_re ""

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test $command $mi_re "thread without args"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output $cli_re "thread without args, event on CLI"
	}
    }

    with_test_prefix "thread 1.3" {
	# Do the 'thread' command to select the third thread, stopped on
	# all-stop, running on non-stop.

	set command [make_cli_in_mi_command $cli_in_mi_mode "thread 1.3"]
	if { $mode == "all-stop" } {
	    set mi_re [make_cli_in_mi_re $command $cli_in_mi_mode $mode 1 -1 1.3 3 0]
	    set cli_re [make_cli_re $mode -1 "1.3" 0]
	} else {
	    set mi_re [make_cli_in_mi_re $command $cli_in_mi_mode $mode 1 -1 1.3 3 -1]
	    set cli_re [make_cli_re $mode -1 "1.3" -1]
	}

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test $command $mi_re "select thread"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output "$cli_re\r\n" "select thread, event on CLI"
	}

	# Do the 'thread' command to select the third thread again.  Again, we
	# shouldn't receive an event on MI.

	if { $mode == "all-stop" } {
	    set mi_re [make_cli_in_mi_re $command $cli_in_mi_mode $mode 0 -1 1.3 3 0]
	} else {
	    set mi_re [make_cli_in_mi_re $command $cli_in_mi_mode $mode 0 -1 1.3 3 -1]
	}
	set cli_re ""

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test $command $mi_re "select thread again"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output $cli_re "select thread again, event on CLI"
	}

	# Try the 'thread' command without arguments.

	set command [make_cli_in_mi_command $cli_in_mi_mode "thread"]

	set mi_re "${command}.*~\"\\\[Current thread is 1\\.3.*\\\]\\\\n\".*\\^done"
	set cli_re ""

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test $command $mi_re "thread without args"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output $cli_re "thread without args, event on CLI"
	}
    }

    # Idea for the future: selecting a thread in a different inferior.  For now,
    # GDB doesn't show an inferior switch, but if it did, it would be a nice
    # place to test it.
}

# Test selecting the frame using a CLI command in the MI channel.

proc_with_prefix test_cli_in_mi_frame { mode cli_in_mi_mode } {
    global gdb_main_spawn_id mi_spawn_id

    with_test_prefix "thread 1.2" {
	reset_selection "1.2"
	flush_buffers

	# Do the 'frame' command to select frame 1.

	set command [make_cli_in_mi_command $cli_in_mi_mode "frame 1"]
	set cli_re [make_cli_re $mode -1 -1 1]
	set mi_re [make_cli_in_mi_re $command $cli_in_mi_mode $mode 1 -1 -1 2 1]

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test $command $mi_re "select frame 1"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output "$cli_re\r\n" "select frame 1, event on CLI"
	}

	# Do the 'frame' command to select the same frame.  This time we don't
	# expect an event on MI, since we won't actually change frame.

	set mi_re [make_cli_in_mi_re $command $cli_in_mi_mode $mode 0 -1 -1 2 1]
	set cli_re ""

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test $command $mi_re "select frame 1 again"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output $cli_re "select frame 1 again, event on CLI"
	}

	# Do the 'frame' command without arguments.  We shouldn't see anything on MI.

	set command [make_cli_in_mi_command $cli_in_mi_mode "frame"]
	set mi_re [make_cli_in_mi_re $command $cli_in_mi_mode $mode 0 -1 -1 2 1]

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test $command $mi_re "frame without args"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output $cli_re "frame without args, event on CLI"
	}
    }

    with_test_prefix "thread 1.3" {
	# Now, try the 'frame' command on thread 3, which is running if we are in
	# non-stop mode.
	reset_selection "1.3"
	flush_buffers

	set command [make_cli_in_mi_command $cli_in_mi_mode "frame 1"]
	if {$mode == "all-stop"} {
	    set cli_re [make_cli_re $mode -1 -1 1]
	    append cli_re "\r\n"
	    set mi_re [make_cli_in_mi_re $command $cli_in_mi_mode $mode 1 -1 -1 3 1]
	} elseif {$mode == "non-stop"} {
	    set cli_re ""
	    set mi_re "\\^error,msg=\"Selected thread is running\\.\".*"
	}

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test $command $mi_re "select frame 1"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output $cli_re "select frame 1, event on CLI"
	}

	# Do the 'frame' command without arguments.

	set command [make_cli_in_mi_command $cli_in_mi_mode "frame"]
	if { $mode == "all-stop" } {
	    set mi_re [make_cli_in_mi_re $command $cli_in_mi_mode $mode 0 -1 -1 -1 1]
	} else {
	    set mi_re "\\^error,msg=\"No stack\\.\""
	}
	set cli_re ""

	with_spawn_id $mi_spawn_id {
	    mi_gdb_test $command $mi_re "frame without args"
	}

	with_spawn_id $gdb_main_spawn_id {
	    match_re_or_ensure_not_output $cli_re "frame without args, event on CLI"
	}
    }
}

foreach_with_prefix mode { "all-stop" "non-stop" } {
    test_setup $mode

    # Test selecting inferior, thread and frame from CLI

    test_cli_inferior $mode
    test_cli_thread $mode
    test_cli_frame $mode
    test_cli_select_frame $mode
    test_cli_up_down $mode

    # Test selecting thread and frame from MI

    test_mi_thread_select $mode
    test_mi_stack_select_frame $mode

    # Test some CLI commands sent through MI, both with a "direct" command,
    # such as "thread 1", and with -interpreter-exec, such as
    # '-interpreter-exec console "thread 1"'.

    foreach_with_prefix exec_mode {"direct" "interpreter-exec"} {
	test_cli_in_mi_inferior $mode $exec_mode
	test_cli_in_mi_thread $mode $exec_mode
	test_cli_in_mi_frame $mode $exec_mode
    }
}