# Copyright 2022 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 aims at testing various operations after getting rid of an inferior
# that was running in background, or while we have an inferior running in
# background.  The original intent was to expose cases where the commit-resumed
# state of the process stratum target was not reset properly after killing an
# inferior running in background, which would be a problem when trying to run
# again.  The test was expanded to test various combinations of
# run-control-related actions done with an inferior running in background.

if {[use_gdb_stub]} {
    unsupported "test requires running"
    return
}

standard_testfile

if {[build_executable "failed to prepare" $testfile $srcfile]} {
    return
}

# Run one variation of the test:
#
# 1. Start an inferior in the background with "run &"
# 2. Do action 1
# 3. Do action 2
#
# Action 1 indicates what to do with the inferior running in background:
#
#  - kill: kill it
#  - detach: detach it
#  - add: add a new inferior and switch to it, leave the inferior running in
#    background alone
#  - none: do nothing, leave the inferior running in background alone
#
# Action 2 indicates what to do after that:
#
#  - start: use the start command
#  - run: use the run command
#  - attach: start a process outside of GDB and attach it
proc do_test { action1 action2 } {
    save_vars { ::GDBFLAGS } {
	append ::GDBFLAGS " -ex \"maintenance set target-non-stop on\""
	clean_restart $::binfile
    }

    # Ensure we are at least after the getpid call, should we need it.
    if { ![runto "after_getpid"] } {
	return
    }

    # Some commands below ask for confirmation.  Turn that off for simplicity.
    gdb_test "set confirm off"
    gdb_test -no-prompt-anchor "continue &"

    if { $action1 == "kill" } {
	gdb_test "kill" "Inferior 1 .* killed.*"
    } elseif { $action1 == "detach" } {
	set child_pid [get_integer_valueof "mypid" -1]
	if { $child_pid == -1 } {
	    fail "failed to extract child pid"
	    return
	}

	gdb_test "detach" "Inferior 1 .* detached.*" "detach from first instance"

	# Kill the detached process, to avoid hanging when exiting GDBserver,
	# when testing with the native-extended-gdbserver board.
	remote_exec target "kill $child_pid"
    } elseif { $action1 == "add" } {
	gdb_test "add-inferior -exec $::binfile" \
	    "Added inferior 2 on connection 1.*" "add-inferior"
	gdb_test "inferior 2" "Switching to inferior 2 .*"
    } elseif { $action1 == "none" } {

    } else {
	error "invalid action 1"
    }

    if { $action2 == "start" } {
	gdb_test "start" "Temporary breakpoint $::decimal\(?:\.$::decimal\)?, main .*"
    } elseif { $action2 == "run" } {
	gdb_test "break main" "Breakpoint $::decimal at $::hex.*"
	gdb_test "run" "Breakpoint $::decimal\(?:\.$::decimal\)?, main .*"
    } elseif { $action2 == "attach" } {
	set test_spawn_id [spawn_wait_for_attach $::binfile]
	set test_pid [spawn_id_get_pid $test_spawn_id]

	if { [gdb_attach $test_pid] } {
	    gdb_test "detach" "Inferior $::decimal .* detached.*" \
		"detach from second instance"
	}

	# Detach and kill this inferior so we don't leave it around.
	kill_wait_spawned_process $test_spawn_id
    } else {
	error "invalid action 2"
    }
}

foreach_with_prefix action1 { kill detach add none } {
    foreach_with_prefix action2 { start run attach } {
	do_test $action1 $action2
    }
}