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1 | # This testcase is part of GDB, the GNU debugger. |
2 | # | |
88b9d363 | 3 | # Copyright 2021-2022 Free Software Foundation, Inc. |
8f66807b AB |
4 | # |
5 | # This program is free software; you can redistribute it and/or modify | |
6 | # it under the terms of the GNU General Public License as published by | |
7 | # the Free Software Foundation; either version 3 of the License, or | |
8 | # (at your option) any later version. | |
9 | # | |
10 | # This program is distributed in the hope that it will be useful, | |
11 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | # GNU General Public License for more details. | |
14 | # | |
15 | # You should have received a copy of the GNU General Public License | |
16 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
17 | ||
18 | # Test how GDB handles the case where a target either doesn't use 'T' | |
19 | # packets at all or doesn't include a thread-id in a 'T' packet, AND, | |
20 | # where the test program contains multiple threads. | |
21 | # | |
22 | # In general if multiple threads are executing and the target doesn't | |
23 | # include a thread-id in its stop response then GDB will not be able | |
24 | # to correctly figure out which thread the stop applies to. | |
25 | # | |
26 | # However, this test covers a very specific case, there are multiple | |
27 | # threads but only a single thread is actually executing. So, when | |
28 | # the stop comes from the target, without a thread-id, GDB should be | |
29 | # able to correctly figure out which thread has stopped. | |
30 | ||
31 | load_lib gdbserver-support.exp | |
32 | ||
33 | if { [skip_gdbserver_tests] } { | |
34 | verbose "skipping gdbserver tests" | |
35 | return -1 | |
36 | } | |
37 | ||
38 | standard_testfile | |
39 | if { [build_executable "failed to prepare" $testfile $srcfile {debug pthreads}] == -1 } { | |
40 | return -1 | |
41 | } | |
42 | ||
43 | # Run the tests with different features of GDBserver disabled. | |
323fd5b9 PA |
44 | # TARGET_NON_STOP is passed to "maint set target-non-stop". |
45 | proc run_test { target_non_stop disable_feature } { | |
8f66807b | 46 | global binfile gdb_prompt decimal hex |
323fd5b9 | 47 | global GDBFLAGS |
8f66807b | 48 | |
323fd5b9 PA |
49 | save_vars { GDBFLAGS } { |
50 | append GDBFLAGS " -ex \"maint set target-non-stop $target_non_stop\"" | |
921b2bc7 SM |
51 | |
52 | # If GDB and GDBserver are both running locally, set the sysroot to avoid | |
53 | # reading files via the remote protocol. | |
54 | if { ![is_remote host] && ![is_remote target] } { | |
55 | set GDBFLAGS "$GDBFLAGS -ex \"set sysroot\"" | |
56 | } | |
57 | ||
323fd5b9 PA |
58 | clean_restart ${binfile} |
59 | } | |
8f66807b AB |
60 | |
61 | # Make sure we're disconnected, in case we're testing with an | |
62 | # extended-remote board, therefore already connected. | |
63 | gdb_test "disconnect" ".*" | |
64 | ||
65 | set packet_arg "" | |
66 | if { $disable_feature != "" } { | |
67 | set packet_arg "--disable-packet=${disable_feature}" | |
68 | } | |
69 | set res [gdbserver_start $packet_arg $binfile] | |
70 | set gdbserver_protocol [lindex $res 0] | |
71 | set gdbserver_gdbport [lindex $res 1] | |
72 | ||
73 | # Disable XML-based thread listing, and multi-process extensions. | |
74 | gdb_test_no_output "set remote threads-packet off" | |
75 | gdb_test_no_output "set remote multiprocess-feature-packet off" | |
76 | ||
77 | set res [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport] | |
78 | if ![gdb_assert {$res == 0} "connect"] { | |
79 | return | |
80 | } | |
81 | ||
82 | # There should be only one thread listed at this point. | |
83 | gdb_test_multiple "info threads" "" { | |
84 | -re "2 Thread.*$gdb_prompt $" { | |
85 | fail $gdb_test_name | |
86 | } | |
87 | -re "has terminated.*$gdb_prompt $" { | |
88 | fail $gdb_test_name | |
89 | } | |
90 | -re "\\\* 1\[\t \]*Thread\[^\r\n\]*\r\n$gdb_prompt $" { | |
91 | pass $gdb_test_name | |
92 | } | |
93 | } | |
94 | ||
95 | gdb_breakpoint "unlock_worker" | |
96 | gdb_continue_to_breakpoint "run to unlock_worker" | |
97 | ||
98 | # There should be two threads at this point with thread 1 selected. | |
99 | gdb_test "info threads" \ | |
100 | "\\\* 1\[\t \]*Thread\[^\r\n\]*\r\n 2\[\t \]*Thread\[^\r\n\]*" \ | |
101 | "second thread should now exist" | |
102 | ||
103 | # Switch threads. | |
104 | gdb_test "thread 2" ".*" "switch to second thread" | |
105 | ||
106 | # Now turn on scheduler-locking so that when we step thread 2 only | |
107 | # that one thread will be set running. | |
108 | gdb_test_no_output "set scheduler-locking on" | |
109 | ||
110 | # Single step thread 2. Only the one thread will step. When the | |
111 | # thread stops, if the stop packet doesn't include a thread-id | |
112 | # then GDB should still understand which thread stopped. | |
113 | gdb_test_multiple "stepi" "" { | |
114 | -re -wrap "Thread 1 received signal SIGTRAP.*" { | |
115 | fail $gdb_test_name | |
116 | } | |
117 | -re -wrap "$hex.*$decimal.*while \\(worker_blocked\\).*" { | |
118 | pass $gdb_test_name | |
119 | } | |
120 | } | |
121 | ||
122 | # Check that thread 2 is still selected. | |
123 | gdb_test "info threads" \ | |
124 | " 1\[\t \]*Thread\[^\r\n\]*\r\n\\\* 2\[\t \]*Thread\[^\r\n\]*" \ | |
125 | "second thread should still be selected after stepi" | |
126 | ||
127 | # Turn scheduler locking off again so that when we continue all | |
128 | # threads will be set running. | |
129 | gdb_test_no_output "set scheduler-locking off" | |
130 | ||
131 | # Continue until exit. The server sends a 'W' with no PID. | |
132 | # Bad GDB gave an error like below when target is nonstop: | |
133 | # (gdb) c | |
134 | # Continuing. | |
135 | # No process or thread specified in stop reply: W00 | |
136 | gdb_continue_to_end "" continue 1 | |
137 | } | |
138 | ||
139 | # Disable different features within gdbserver: | |
140 | # | |
141 | # Tthread: Start GDBserver, with ";thread:NNN" in T stop replies disabled, | |
142 | # emulating old gdbservers when debugging single-threaded programs. | |
143 | # | |
144 | # T: Start GDBserver with the entire 'T' stop reply packet disabled, | |
145 | # GDBserver will instead send the 'S' stop reply. | |
323fd5b9 PA |
146 | # |
147 | # Also test both all-stop and non-stop variants of the remote | |
148 | # protocol. | |
149 | foreach_with_prefix target-non-stop {"off" "on"} { | |
150 | foreach_with_prefix to_disable { "" Tthread T } { | |
151 | run_test ${target-non-stop} $to_disable | |
152 | } | |
8f66807b | 153 | } |