aboutsummaryrefslogtreecommitdiff
path: root/gdb/testsuite/gdb.server/stop-reply-no-thread-multi.exp
blob: 042c285d98a98799025398b40a696851e7e15244 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
# This testcase is part of GDB, the GNU debugger.
#
# Copyright 2021-2023 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 how GDB handles the case where a target either doesn't use 'T'
# packets at all or doesn't include a thread-id in a 'T' packet, AND,
# where the test program contains multiple threads.
#
# In general if multiple threads are executing and the target doesn't
# include a thread-id in its stop response then GDB will not be able
# to correctly figure out which thread the stop applies to.
#
# However, this test covers a very specific case, there are multiple
# threads but only a single thread is actually executing.  So, when
# the stop comes from the target, without a thread-id, GDB should be
# able to correctly figure out which thread has stopped.

load_lib gdbserver-support.exp

require allow_gdbserver_tests

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

# Run the tests with different features of GDBserver disabled.
# TARGET_NON_STOP is passed to "maint set target-non-stop".
proc run_test { target_non_stop disable_feature } {
    global binfile gdb_prompt decimal hex
    global GDBFLAGS

    save_vars { GDBFLAGS } {
	append GDBFLAGS " -ex \"maint set target-non-stop $target_non_stop\""

	# 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 ${binfile}
    }

    # Make sure we're disconnected, in case we're testing with an
    # extended-remote board, therefore already connected.
    gdb_test "disconnect" ".*"

    set packet_arg ""
    if { $disable_feature != "" } {
	set packet_arg "--disable-packet=${disable_feature}"
    }
    set res [gdbserver_start $packet_arg $binfile]
    set gdbserver_protocol [lindex $res 0]
    set gdbserver_gdbport [lindex $res 1]

    # Disable XML-based thread listing, and multi-process extensions.
    gdb_test \
	"set remote threads-packet off" \
	"Support for the 'qXfer:threads:read' packet on future remote targets is set to \"off\"."
    gdb_test \
	"set remote multiprocess-feature-packet off" \
	"Support for the 'multiprocess-feature' packet on future remote targets is set to \"off\"."

    set res [gdb_target_cmd $gdbserver_protocol $gdbserver_gdbport]
    if ![gdb_assert {$res == 0} "connect"] {
	return
    }

    # There should be only one thread listed at this point.
    gdb_test_multiple "info threads" "" {
	-re "2 Thread.*$gdb_prompt $" {
	    fail $gdb_test_name
	}
	-re "has terminated.*$gdb_prompt $" {
	    fail $gdb_test_name
	}
	-re "\\\* 1\[\t \]*Thread\[^\r\n\]*\r\n$gdb_prompt $" {
	    pass $gdb_test_name
	}
    }

    gdb_breakpoint "unlock_worker"
    gdb_continue_to_breakpoint "run to unlock_worker"

    # There should be two threads at this point with thread 1 selected.
    gdb_test "info threads" \
	"\\\* 1\[\t \]*Thread\[^\r\n\]*\r\n  2\[\t \]*Thread\[^\r\n\]*" \
	"second thread should now exist"

    # Switch threads.
    gdb_test "thread 2" ".*" "switch to second thread"

    # Now turn on scheduler-locking so that when we step thread 2 only
    # that one thread will be set running.
    gdb_test_no_output "set scheduler-locking on"

    # Single step thread 2.  Only the one thread will step.  When the
    # thread stops, if the stop packet doesn't include a thread-id
    # then GDB should still understand which thread stopped.
    gdb_test_multiple "stepi" "" {
	-re -wrap "Thread 1 received signal SIGTRAP.*" {
	    fail $gdb_test_name
	}
	-re -wrap "$hex.*$decimal.*while \\(worker_blocked\\).*" {
	    pass $gdb_test_name
	}
    }

    # Check that thread 2 is still selected.
    gdb_test "info threads" \
	"  1\[\t \]*Thread\[^\r\n\]*\r\n\\\* 2\[\t \]*Thread\[^\r\n\]*" \
	"second thread should still be selected after stepi"

    # Turn scheduler locking off again so that when we continue all
    # threads will be set running.
    gdb_test_no_output "set scheduler-locking off"

    # Continue until exit.  The server sends a 'W' with no PID.
    # Bad GDB gave an error like below when target is nonstop:
    #  (gdb) c
    #  Continuing.
    #  No process or thread specified in stop reply: W00
    gdb_continue_to_end "" continue 1
}

# Disable different features within gdbserver:
#
# Tthread: Start GDBserver, with ";thread:NNN" in T stop replies disabled,
#          emulating old gdbservers when debugging single-threaded programs.
#
# T: Start GDBserver with the entire 'T' stop reply packet disabled,
#    GDBserver will instead send the 'S' stop reply.
#
# Also test both all-stop and non-stop variants of the remote
# protocol.
foreach_with_prefix target-non-stop {"off" "on"} {
    foreach_with_prefix to_disable { "" Tthread T } {
	run_test ${target-non-stop} $to_disable
    }
}