gdb/testsuite/gdb.server/exit-multiple-threads.exp

# 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 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
}

standard_testfile

# 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 } {
    global GDBFLAGS

    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"] {
	return
    }

    # 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 [prepare_for_testing "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}
    }
}