# Copyright 2017-2021 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/>.  */

# Check that we can attach to processes that are not process group
# leaders.  We test that by attaching to a fork child that doesn't
# call any of setpgrp/setpgid/setsid to move itself to a new process
# group.

if {![can_spawn_for_attach]} {
    return 0
}

standard_testfile

if { [build_executable ${testfile}.exp ${testfile} $srcfile {debug}] == -1 } {
    return -1
}

proc do_test {} {
    global binfile
    global decimal

    set test_spawn_id [spawn_wait_for_attach $binfile]
    set parent_pid [spawn_id_get_pid $test_spawn_id]

    # Attach to the parent, run it to a known point, extract the
    # child's PID, and detach.
    with_test_prefix "parent" {
	clean_restart ${binfile}

	gdb_test "attach $parent_pid" \
	    "Attaching to program.*, process $parent_pid.*" \
	    "attach"

	gdb_breakpoint "marker"
	gdb_continue_to_breakpoint "marker"

	set child_pid [get_integer_valueof "child_pid" -1]
	if {$child_pid == -1} {
	    return
	}

	gdb_test "detach" \
	    "Detaching from program: .*process $parent_pid\r\n\\\[Inferior $decimal \\(.*\\) detached\\\]"
    }

    # Start over, and attach to the child this time.
    with_test_prefix "child" {
	clean_restart $binfile

	gdb_test "attach $child_pid" \
	    "Attaching to program.*, process $child_pid.*" \
	    "attach"

	gdb_breakpoint "marker"
	gdb_continue_to_breakpoint "marker"

	gdb_test "detach" \
	    "Detaching from program: .*process $child_pid\r\n\\\[Inferior $decimal \\(.*\\) detached\\\]"
    }

    kill_wait_spawned_process $test_spawn_id
}

do_test