# Copyright (C) 2017-2020 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/>.

# Test quitting GDB with live inferiors.
#
# Exercises combinations of:
#
# - quitting with "quit" command, or with SIGTERM/SIGHUP signals.
#
# - quitting with live inferior selected, or file_stratum inferior
#   selected.
#
# - quitting after "run", or after "attach".
#
# - quitting with local executable, or executable loaded from target
#   directly (via default "target:/" sysroot), or with no executable
#   loaded.

# Note: sending an asynchronous SIGHUP with kill is not the exact same
# as closing GDB's input, and that resulting in SIGHUP.  However, it's
# still a good approximation, and it has the advantage that because
# GDB still has a terminal, internal errors (if any) are visible in
# gdb.sum/gdb.log.

standard_testfile

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

# Send signal SIG to GDB, and expect GDB to exit.

proc test_quit_with_sig {sig} {
    set gdb_pid [exp_pid -i [board_info host fileid]]
    remote_exec host "kill -$sig ${gdb_pid}"

    set test "quit with SIG$sig"
    # If GDB mishandles the signal and doesn't exit, this should FAIL
    # with timeout.  We don't expect a GDB prompt, so if we see one,
    # we'll FAIL too (without having to wait for timeout).
    gdb_test_multiple "" $test {
	eof {
	    pass $test
	}
    }
}

# Call the "quit" command with an inferior live.
#
# APPEAR_HOW specifies how the running inferior appears in GDB.  Can
# be either:
#
# - "run"
#
#    Appear via the "run" command.
#
# - "attach"
#
#    Appear via the "attach" command.
#
# - "attach-nofile"
#
#    Appear via the "attach" command, but with no program preloaded in
#    GDB so that GDB reads the program directly from the target when
#    remote debugging (i.e., from the target:/ sysroot).  This makes
#    sure that GDB doesn't misbehave if it decides to close the
#    'target:/.../program' exec_file after closing the remote
#    connection.
#
# EXTRA_INFERIOR is a boolean that specifies whether we try to quit
# GDB with an extra executable-only (before "run") inferior selected
# or whether we try to quit GDB when the live inferior is selected,
# with no extra inferior.
#
# QUIT_HOW specifies how to tell GDB to quit.  It can be either "quit"
# (for "quit" command), "sighup" or "sigterm" (for quitting with
# SIGHUP and SIGTERM signals, respectively).

proc quit_with_live_inferior {appear_how extra_inferior quit_how} {
    global srcfile testfile binfile
    global gdb_spawn_id gdb_prompt

    set test_spawn_id ""

    if {$appear_how != "attach-nofile"} {
	clean_restart $binfile
    } else {
	clean_restart
    }

    if {$appear_how == "run"} {
	if ![runto_main] then {
	    fail "can't run to main"
	    return
	}
    } elseif {$appear_how == "attach" || $appear_how == "attach-nofile"} {
	set test_spawn_id [spawn_wait_for_attach $binfile]
	set testpid [spawn_id_get_pid $test_spawn_id]

	if {[gdb_test "attach $testpid" \
		 "Attaching to .*process $testpid.*Reading symbols from.*" \
		 "attach"] != 0} {
	    kill_wait_spawned_process $test_spawn_id
	    return
	}
    } else {
	error "unhandled '\$appear_how': $appear_how"
    }

    if {$extra_inferior} {
	gdb_test "add-inferior" "Added inferior 2 on connection .*" \
	    "add empty inferior 2"
	gdb_test "inferior 2" "Switching to inferior 2.*" \
	    "switch to inferior 2"
    }

    if {$quit_how == "quit"} {
	# Make regexp that matches the "quit" command's output.
	proc make_re {how} {
	    multi_line \
		"A debugging session is active.\[ \t\r\n\]*Inferior 1\[^\r\n\]* will be $how\." \
		"" \
		"Quit anyway\\? \\(y or n\\) $"
	}

	if {$appear_how == "run"} {
	    set quit_anyway_re [make_re "killed"]
	} else {
	    set quit_anyway_re [make_re "detached"]
	}

	set test "quit with \"quit\""
	gdb_test_multiple "quit" $test {
	    -re $quit_anyway_re {
		send_gdb "y\n"
		gdb_test_multiple "" $test {
		    eof {
			pass $test
		    }
		}
	    }
	}
    } elseif {$quit_how == "sighup"} {
	test_quit_with_sig HUP
    } elseif {$quit_how == "sigterm"} {
	test_quit_with_sig TERM
    } else {
	error "unhandled '\$quit_how': $quit_how"
    }

    if {$test_spawn_id != ""} {
	kill_wait_spawned_process $test_spawn_id
    }
}

foreach_with_prefix appear_how {"run" "attach" "attach-nofile"} {
    if {$appear_how != "run" && ![can_spawn_for_attach]} {
	continue
    }

    foreach_with_prefix extra_inferior {0 1} {
	foreach_with_prefix quit_how {"quit" "sigterm" "sighup"} {
	    quit_with_live_inferior $appear_how $extra_inferior $quit_how
	}
    }
}