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# 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
# 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 <>.
# Test that GDB can handle receiving the W and X packets for a target
# with multiple threads, but only a single inferior.
# Specifically, check GDB handles this case where multi-process
# extensions are turned off. At one point this was causing GDB to
# give a warning when the exit arrived that the remote needed to
# include a thread-id, which was not correct.
load_lib gdbserver-support.exp
if { [skip_gdbserver_tests] } {
verbose "skipping gdbserver tests"
return -1
# Start up GDB and GDBserver debugging EXECUTABLE. When
# DISABLE_MULTI_PROCESS is true then disable GDB's remote
# multi-process support, otherwise, leave it enabled.
# Places a breakpoint in function 'breakpt' and then continues to the
# breakpoint, at which point it runs 'info threads'.
proc prepare_for_test { executable disable_multi_process } {
save_vars { GDBFLAGS } {
# If GDB and GDBserver are both running locally, set the sysroot to avoid
# reading files via the remote protocol.
if { ![is_remote host] && ![is_remote target] } {
set GDBFLAGS "$GDBFLAGS -ex \"set sysroot\""
clean_restart ${executable}
# Make sure we're disconnected, in case we're testing with an
# extended-remote board, therefore already connected.
gdb_test "disconnect" ".*"
# Disable XML-based thread listing, and possible the multi-process
# extensions.
gdb_test_no_output "set remote threads-packet off"
if { $disable_multi_process } {
gdb_test_no_output "set remote multiprocess-feature-packet off"
# Start gdbserver and connect.
set res [gdbserver_start "" $executable]
set gdbserver_protocol [lindex $res 0]
set gdbserver_gdbport [lindex $res 1]
set res [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
if ![gdb_assert {$res == 0} "connect"] {
# Run until we hit the breakpt function, then list all threads.
gdb_breakpoint "breakpt"
gdb_continue_to_breakpoint "breakpt"
gdb_test "info threads" ".*"
# Run the tests where the inferior exits normally (the W packet) while
# we have multiple-threads. EXECUTABLE is the binary under test, and
# DISABLE_MULTI_PROCESS indicates if we should disable GDB's remote
# multi-process support.
proc run_exit_test { executable disable_multi_process } {
global decimal
prepare_for_test ${executable} ${disable_multi_process}
# Finally, continue until the process exits, ensure we don't see
# any warnings between "Continuing." and the final process has
# exited message.
if { $disable_multi_process } {
set process_pattern "Remote target"
} else {
set process_pattern "process $decimal"
gdb_test "continue" \
[multi_line \
"Continuing\\." \
"\\\[Inferior $decimal \\\(${process_pattern}\\\) exited normally\\\]" ] \
"continue until process exits"
# Run the tests where the inferior exits with a signal (the X packet)
# while we have multiple-threads. EXECUTABLE is the binary under
# test, and DISABLE_MULTI_PROCESS indicates if we should disable GDB's
# remote multi-process support.
proc run_signal_test { executable disable_multi_process } {
global decimal gdb_prompt
prepare_for_test ${executable} ${disable_multi_process}
set inf_pid [get_valueof "/d" "global_pid" "unknown"]
gdb_assert ![string eq ${inf_pid} "unknown"] "read the pid"
# This sets the inferior running again, with all threads going
# into a long delay loop.
send_gdb "continue\n"
# Send the inferior a signal to kill it.
sleep 1
remote_exec target "kill -9 ${inf_pid}"
# Process the output from GDB.
gdb_test_multiple "" "inferior exited with signal" {
-re "Continuing\\.\r\n\r\nProgram terminated with signal SIGKILL, Killed.\r\nThe program no longer exists.\r\n$gdb_prompt $" {
pass $gdb_test_name
# Run all of the tests.
foreach_with_prefix test { exit signal } {
set def "DO_[string toupper $test]_TEST"
set func "run_${test}_test"
set executable "$binfile-${test}"
if [build_executable "failed to prepare" $executable $srcfile \
[list debug pthreads additional_flags=-D${def}]] {
return -1
foreach_with_prefix multi_process { 0 1 } {
$func ${executable} ${multi_process}