1 # This testcase is part of GDB, the GNU debugger.
3 # Copyright 2018-2022 Free Software Foundation, Inc.
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6 # it under the terms of the GNU General Public License as published by
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12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 # GNU General Public License for more details.
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18 # Test backward compatibility with older GDBservers which did not
19 # include ";thread:NNN" in T stop replies when debugging
20 # single-threaded programs, even though they'd list the main thread in
21 # response to qfThreadInfo/qsThreadInfo. See PR remote/22597.
23 load_lib gdbserver-support.exp
25 if { [skip_gdbserver_tests] } {
26 verbose "skipping gdbserver tests"
31 if { [build_executable "failed to prepare" $testfile $srcfile] == -1 } {
35 # Run the tests with different features of GDBserver disabled.
36 proc run_test { disable_feature target_nonstop } {
37 global binfile gdb_prompt decimal GDBFLAGS
39 save_vars { GDBFLAGS } {
40 # If GDB and GDBserver are both running locally, set the sysroot to avoid
41 # reading files via the remote protocol.
42 if { ![is_remote host] && ![is_remote target] } {
43 set GDBFLAGS "$GDBFLAGS -ex \"set sysroot\""
46 clean_restart ${binfile}
49 # Make sure we're disconnected, in case we're testing with an
50 # extended-remote board, therefore already connected.
51 gdb_test "disconnect" ".*"
54 if { $disable_feature != "" } {
55 set packet_arg "--disable-packet=${disable_feature}"
57 set res [gdbserver_start $packet_arg $binfile]
58 set gdbserver_protocol [lindex $res 0]
59 set gdbserver_gdbport [lindex $res 1]
61 # Disable XML-based thread listing, and multi-process extensions.
62 gdb_test_no_output "set remote threads-packet off"
63 gdb_test_no_output "set remote multiprocess-feature-packet off"
65 # Set target-nonstop mode.
66 gdb_test_no_output "maint set target-non-stop ${target_nonstop}"
68 set res [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
69 if ![gdb_assert {$res == 0} "connect"] {
73 # There should be only one thread listed.
74 set test "info threads"
75 gdb_test_multiple $test $test {
76 -re "2 Thread.*$gdb_prompt $" {
79 -re "has terminated.*$gdb_prompt $" {
82 -re "\\\* 1\[\t \]*Thread\[^\r\n\]*\r\n$gdb_prompt $" {
89 # Bad GDB behaved like this:
91 # Cannot execute this command without a live selected thread.
93 gdb_test "c" "Breakpoint $decimal, main.*" "continue to main"
95 # Continue until exit. The server sends a 'W' with no PID.
96 # Bad GDB gave an error like below when target is nonstop:
99 # No process or thread specified in stop reply: W00
100 gdb_continue_to_end "" continue 1
103 # Disable different features within gdbserver:
105 # Tthread: Start GDBserver, with ";thread:NNN" in T stop replies disabled,
106 # emulating old gdbservers when debugging single-threaded programs.
108 # T: Start GDBserver with the entire 'T' stop reply packet disabled,
109 # GDBserver will instead send the 'S' stop reply.
110 foreach_with_prefix to_disable { "" Tthread T } {
111 foreach_with_prefix t_nonstop { off on } {
112 run_test $to_disable $t_nonstop
116 # Regression for PR gdb/26819: Cover the case when GDBserver does not report
117 # any threads (i.e. the remote target has no concept of threads).
119 # Scenario 1: Disable 'T' and 'qfThreadInfo' packets
120 # Scenario 2: Disable all threading packets
121 foreach_with_prefix to_disable { "T,qfThreadInfo" "threads" } {
122 # Non-stop mode not applicable - off.
123 run_test $to_disable off