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ede9f622 PA |
1 | # Copyright (C) 2014-2015 Free Software Foundation, Inc. |
2 | ||
3 | # This program is free software; you can redistribute it and/or modify | |
4 | # it under the terms of the GNU General Public License as published by | |
5 | # the Free Software Foundation; either version 3 of the License, or | |
6 | # (at your option) any later version. | |
7 | # | |
8 | # This program is distributed in the hope that it will be useful, | |
9 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | # GNU General Public License for more details. | |
12 | # | |
13 | # You should have received a copy of the GNU General Public License | |
14 | # along with this program. If not, see <http://www.gnu.org/licenses/>. | |
15 | ||
16 | # Test that GDB in non-stop mode gives roughly equal priority to | |
17 | # events of all threads. | |
18 | ||
19 | standard_testfile | |
20 | set executable ${testfile} | |
21 | ||
22 | if [target_info exists gdb,nosignals] { | |
23 | verbose "Skipping ${testfile}.exp because of nosignals." | |
24 | return -1 | |
25 | } | |
26 | ||
27 | if {[prepare_for_testing "failed to prepare" $testfile $srcfile {debug pthreads}] == -1} { | |
28 | return -1 | |
29 | } | |
30 | ||
31 | gdb_test_no_output "set non-stop on" | |
32 | ||
33 | if ![runto_main] { | |
34 | return -1 | |
35 | } | |
36 | ||
37 | # We want "handle print", to make sure the target backend reports the | |
38 | # signal to the run control core. | |
39 | gdb_test "handle SIGUSR1 print nostop pass" "" | |
40 | ||
41 | # Get current value of VAR from the inferior. TEST is used as test | |
42 | # message. | |
43 | ||
44 | proc get_value {var test} { | |
45 | global expect_out | |
46 | global gdb_prompt | |
47 | global decimal | |
48 | ||
49 | set value -1 | |
50 | gdb_test_multiple "print $var" "$test" { | |
51 | -re ".*= ($decimal).*\r\n$gdb_prompt $" { | |
52 | set value $expect_out(1,string) | |
53 | pass "$test" | |
54 | } | |
55 | } | |
56 | return ${value} | |
57 | } | |
58 | ||
59 | set NUM_THREADS [get_value "num_threads" "get num_threads"] | |
60 | ||
61 | # Account for the main thread. | |
62 | incr NUM_THREADS | |
63 | ||
64 | # Run threads to their start positions. This prepares for a new test | |
65 | # sequence. | |
66 | ||
67 | proc restart {} { | |
68 | global gdb_prompt | |
69 | global NUM_THREADS | |
70 | ||
71 | delete_breakpoints | |
72 | ||
73 | gdb_test "print got_sig = 0" " = 0" | |
74 | ||
75 | gdb_breakpoint [gdb_get_line_number "set thread breakpoint here"] | |
76 | gdb_breakpoint [gdb_get_line_number "set kill breakpoint here"] | |
77 | ||
78 | set test "continue -a&" | |
79 | gdb_test_multiple $test $test { | |
80 | -re "Continuing.\r\n$gdb_prompt " { | |
81 | pass $test | |
82 | } | |
83 | } | |
84 | ||
85 | for {set i 1} { $i <= $NUM_THREADS } { incr i } { | |
86 | set test "thread $i restarted" | |
87 | gdb_test_multiple "" $test { | |
88 | -re "breakpoint here" { | |
89 | # The prompt was already matched in the "continue &" | |
90 | # test above. We're now consuming asynchronous output | |
91 | # that comes after the prompt. | |
92 | pass $test | |
93 | } | |
94 | } | |
95 | } | |
96 | ||
97 | delete_breakpoints | |
98 | } | |
99 | ||
100 | # The test proper. SIGNAL_THREAD is the thread that has been elected | |
101 | # to receive the SIGUSR1 signal. | |
102 | ||
103 | proc test {signal_thread} { | |
104 | global gdb_prompt | |
105 | global NUM_THREADS | |
106 | ||
107 | with_test_prefix "signal_thread=$signal_thread" { | |
108 | restart | |
109 | ||
110 | # Set all threads stepping the infinite loop line in parallel. | |
111 | for {set i 2} { $i <= $NUM_THREADS } { incr i } { | |
112 | gdb_test "thread $i" \ | |
113 | "child_function.*set thread breakpoint here.*" \ | |
114 | "switch to thread $i to step it" | |
115 | ||
116 | if {$i == $signal_thread} { | |
117 | gdb_test "print signal_thread = self" " = .*" | |
118 | } | |
119 | ||
120 | gdb_test "step&" "" "set $i thread stepping" | |
121 | } | |
122 | ||
123 | gdb_test "thread 1" "Switching to .*" \ | |
124 | "switch to the main thread to queue signal" | |
125 | ||
126 | # Let the main thread queue the signal. | |
127 | gdb_breakpoint "loop_broke" | |
128 | set test "continue &" | |
129 | gdb_test_multiple $test $test { | |
130 | -re "Continuing.\r\n$gdb_prompt " { | |
131 | pass $test | |
132 | } | |
133 | } | |
134 | ||
135 | # Wait for all threads to finish their steps, and for the main | |
136 | # thread to hit the breakpoint. | |
137 | for {set i 1} { $i <= $NUM_THREADS } { incr i } { | |
138 | set test "thread $i broke out of loop" | |
139 | gdb_test_multiple "" $test { | |
140 | -re "loop_broke" { | |
141 | # The prompt was already matched in the "continue | |
142 | # &" test above. We're now consuming asynchronous | |
143 | # output that comes after the prompt. | |
144 | pass $test | |
145 | } | |
146 | } | |
147 | } | |
148 | ||
149 | # It's helpful to have this in the log if the test ever | |
150 | # happens to fail. | |
151 | gdb_test "info threads" | |
152 | } | |
153 | } | |
154 | ||
155 | # The kernel/debug API may always walk its thread list looking for the | |
156 | # first with an event, resulting in giving priority to e.g. the thread | |
157 | # with lowest kernel thread ID. So test once with the signal pending | |
158 | # in each thread, except the main thread. | |
159 | for {set i 2} { $i <= $NUM_THREADS } { incr i } { | |
160 | test $i | |
161 | } |