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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
# Copyright (C) 2014-2016 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 "signal FOO" behaves correctly when we have multiple
# threads that have stopped for a signal.
if [target_info exists gdb,nosignals] {
verbose "Skipping ${testfile}.exp because of nosignals."
return -1
}
standard_testfile
if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" \
executable { debug }] != "" } {
return -1
}
# Run the test proper. SCHEDLOCK indicates which variant (around
# scheduler-locking) of the test to perform.
proc test { schedlock } {
global srcfile binfile
with_test_prefix "schedlock $schedlock" {
clean_restart ${binfile}
if ![runto_main] then {
fail "can't run to main"
return 0
}
gdb_test "handle SIGUSR1 stop print pass"
gdb_test "handle SIGUSR2 stop print pass"
gdb_test "break all_threads_started" "Breakpoint .* at .*$srcfile.*"
# Create threads one at a time, to insure stable thread
# numbers between runs and targets.
gdb_test "break thread_function" "Breakpoint .* at .*$srcfile.*"
gdb_test "continue" "thread_function.*" "thread 2 created"
gdb_test "continue" "thread_function.*" "thread 3 created"
gdb_test "continue" "all_threads_started.*"
# Using schedlock, let the main thread queue a signal for each
# non-main thread.
gdb_test_no_output "set scheduler-locking on"
gdb_test "break all_threads_signalled" "Breakpoint .* at .*$srcfile.*"
gdb_test "continue" "all_threads_signalled.*"
gdb_test "info threads" "\\\* 1\[ \t\]+Thread.*" "thread 1 selected"
# With schedlock still enabled, let each thread report its
# signal.
gdb_test "thread 3" "Switching to thread 3.*"
gdb_test "continue" "Thread 3 .*received signal SIGUSR2.*" "stop with SIGUSR2"
gdb_test "thread 2" "Switching to thread 2.*"
gdb_test "continue" "Thread 2 .*received signal SIGUSR1.*" "stop with SIGUSR1"
gdb_test "break handler_sigusr1" "Breakpoint .* at .*$srcfile.*"
gdb_test "break handler_sigusr2" "Breakpoint .* at .*$srcfile.*"
set handler_re "Breakpoint .*, handler_sigusr. \\(sig=.*\\) at .*"
# Now test the "signal" command with either scheduler locking
# enabled or disabled.
if { $schedlock == "off" } {
# With scheduler locking off, switch to the main thread
# and issue "signal 0". "signal 0" should then warn that
# two threads have signals that will be delivered. When
# we let the command proceed, a signal should be
# delivered, and thus the corresponding breakpoint in the
# signal handler should trigger.
gdb_test_no_output "set scheduler-locking off"
gdb_test "thread 1" "Switching to thread 1.*"
set queried 0
set test "signal command queries"
gdb_test_multiple "signal 0" $test {
-re "stopped with.*stopped with.*stopped with.*Continue anyway.*y or n. $" {
fail "$test (too many threads noted)"
set queried 1
}
-re "stopped with signal SIGUSR.*\r\nContinuing .*still deliver .*Continue anyway.*y or n. $" {
pass $test
set queried 1
}
-re "Continue anyway.*y or n. $" {
fail "$test (no threads noted)"
set queried 1
}
}
# Continuing should stop in one of the signal handlers.
# Which thread runs first is not determinate.
if {$queried} {
gdb_test "y" "$handler_re" "one signal delivered"
}
# Continuing a second time should stop in the other
# handler.
with_test_prefix "second signal" {
gdb_test "continue" "$handler_re" "signal delivered"
}
} else {
# With scheduler locking on, stay with thread 2 selected,
# and try to deliver its signal explicitly. The "signal"
# command should then warn that one other thread has a
# signal that will be delivered. When we let the command
# proceed, the current thread's signal should be
# delivered, and thus the corresponding breakpoint in the
# signal handler should trigger.
gdb_test "signal SIGUSR1" \
"Breakpoint .*, handler_sigusr1 \\(sig=.*\\) at .*" \
"signal command does not query, signal delivered"
with_test_prefix "second signal" {
# The other thread had stopped for a signal too, and
# it wasn't resumed yet. Disabling schedlock and
# trying "signal 0" from the main thread should warn
# again.
gdb_test_no_output "set scheduler-locking off"
set queried 0
set test "signal command queries"
gdb_test_multiple "signal 0" $test {
-re "stopped with.*stopped with.*Continue anyway.*y or n. $" {
fail "$test (too many threads noted)"
set queried 1
}
-re "stopped with signal SIGUSR.*\r\nContinuing .*still deliver .*Continue anyway.*y or n. $" {
pass $test
set queried 1
}
-re "Continue anyway.*y or n. $" {
fail "$test (no threads noted)"
set queried 1
}
}
if {$queried} {
gdb_test "y" "Breakpoint .*, handler_sigusr2 \\(sig=.*\\) at .*" "signal delivered"
}
}
}
# Both threads got their signal. Continuing again should
# neither intercept nor deliver any other signal.
gdb_test "b end" "Breakpoint .* at .*$srcfile.*"
gdb_test "continue" "end .*" "no more signals"
}
}
foreach schedlock {"off" "on"} {
test $schedlock
}
|
