# Copyright 2021-2023 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 that GDB does not crash when it is started without a terminal /
# without readline, and, it receives a SIGWINCH.  Regression test for
# PR gdb/26056.

if [target_info exists gdb,nosignals] {
    verbose "Skipping $subdir/$gdb_test_file_name.exp because of nosignals."
    return
}

# The testfile relies on "run" from the command line, so only works
# with "target native".
if { [target_info gdb_protocol] != "" } {
    return
}

gdb_exit

# Start GDB without a terminal, running sleep for a while.  Before the
# sleep exits, we'll send a SIGWINCH.  "show editing" to double check
# that readline is disabled.
save_vars { GDB GDBFLAGS } {
    set GDB "$srcdir/lib/notty-wrap $GDB"
    set GDBFLAGS "$GDBFLAGS -ex \"show editing\" -ex run --args sleep 3"

    gdb_spawn
}

set gdb_pid [exp_pid -i $gdb_spawn_id]

verbose -log "gdb_spawn_id=$gdb_spawn_id"
verbose -log "gdb_pid=$gdb_pid"

after 1000 {
    # Note, GDB is started under a shell, so PID is actually the
    # shell's pid, not GDB's.  Use "-PID" to send the signal to the
    # whole process group and reach GDB, instead of just to the shell.
    remote_exec host "kill -SIGWINCH -${gdb_pid}"
}

# If GDB mishandles the SIGWINCH and crashes, that happens before we
# see the "inferior exited normally" message, so this will ERROR with
# eof.
gdb_test_multiple "" "wait for sleep exit" {
    -re "Editing of command lines as they are typed is off.*$inferior_exited_re normally.*$gdb_prompt " {
	pass $gdb_test_name
    }
}

gdb_test_multiple "" "wait for gdb exit" {
    eof {
	set wait_status [wait -i $gdb_spawn_id]
	verbose -log "GDB process exited with wait status $wait_status"
	pass $gdb_test_name
    }
}