# This testcase is part of GDB, the GNU debugger.

# Copyright 2020-2021 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/>.

# Test receiving TARGET_WAITKIND_SIGNALLED events from multiple
# inferiors.  In all stop-mode, upon receiving the exit event from one
# of the inferiors, GDB will try to stop the other inferior, too.  So,
# a stop request will be sent.  Receiving a TARGET_WAITKIND_SIGNALLED
# status kind as a response to that stop request instead of a
# TARGET_WAITKIND_STOPPED should be handled by GDB without problems.

standard_testfile

if {[use_gdb_stub]} {
    return 0
}

if {[build_executable "failed to prepare" $testfile $srcfile {debug}]} {
    return -1
}

# We are testing GDB's ability to stop all threads.
# Hence, go with the all-stop-on-top-of-non-stop mode.
save_vars { GDBFLAGS } {
    append GDBFLAGS " -ex \"maint set target-non-stop on\""
    clean_restart ${binfile}
}

# Wrap the entire test in a namespace to avoid contaminating other tests.
namespace eval $testfile {

# Start inferior NUM and record its PID in the TESTPID array.

proc start_inferior {num} {
    with_test_prefix "start_inferior $num" {
	variable testpid
	global binfile srcfile

	if {$num != 1} {
	    gdb_test "add-inferior" "Added inferior .*" \
		"add empty inferior"
	    gdb_test "inferior $num" "Switching to inferior .*" \
		"switch to inferior"
	}

	gdb_load $binfile

	gdb_breakpoint "initialized" {temporary}
	gdb_run_cmd
	gdb_test "" ".*reakpoint .*, initialized .*${srcfile}.*" "run"

	set testpid($num) [get_integer_valueof "pid" -1]
	if {$testpid($num) == -1} {
	    return -1
	}

	return 0
    }
}

# Sufficient inferiors to make sure that at least some other inferior
# is killed while we're handling a killed event.
set NUM_INFS 10

# The array holding each inferior's PID, indexed by inferior number.
variable testpid
array set testpid {}

for {set i 1} {$i <= $NUM_INFS} {incr i} {
    if {[start_inferior $i] < 0} {
	return -1
    }
}

# We want to continue all processes.
gdb_test_no_output "set schedule-multiple on"

# Resume, but then kill all from outside.
gdb_test_multiple "continue" "continue processes" {
    -re "Continuing.\[\r\n\]+" {
	# Kill all processes at once.

	set kill_cmd "kill -9"
	for {set i 1} {$i <= $NUM_INFS} {incr i} {
	    append kill_cmd " $testpid($i)"
	}

	remote_exec target $kill_cmd
	exp_continue
    }
    -re "Program terminated with signal.*$gdb_prompt $" {
	pass $gdb_test_name
    }
}

# Check that "continue" collects the process kill event, as many times
# as we have inferiors left.

for {set i 2} {$i <= $NUM_INFS} {incr i} {
    with_test_prefix "inf $i" {
	set live_inferior ""

	# Pick any live inferior.
	gdb_test_multiple "info inferiors" "" {
	    -re "($decimal) *process.*$gdb_prompt $" {
		set live_inferior $expect_out(1,string)
	    }
	}

	if {$live_inferior == ""} {
	    return -1
	}

	gdb_test "inferior $live_inferior" \
	    ".*Switching to inferior $live_inferior.*" \
	    "switch to inferior"

	gdb_test "continue" \
	    "Program terminated with signal SIGKILL, .*" \
	    "continue to SIGKILL"
    }
}

}