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
|
# Copyright (C) 2004-2016 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 making hand function calls in multiple threads.
set NR_THREADS 4
standard_testfile
if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "additional_flags=-DNR_THREADS=$NR_THREADS"]] != "" } {
return -1
}
# Some targets can't do function calls, so don't even bother with this
# test.
if [target_info exists gdb,cannot_call_functions] {
unsupported "this target can not call functions"
continue
}
proc get_dummy_frame_number { } {
global gdb_prompt
gdb_test_multiple "bt" "" {
-re "#(\[0-9\]*) *<function called from gdb>.*$gdb_prompt $" {
return $expect_out(1,string)
}
-re "$gdb_prompt $" {
return ""
}
timeout {
return ""
}
}
return ""
}
clean_restart ${binfile}
if { ![runto_main] } {
fail "can't run to main"
return 0
}
gdb_test "break all_threads_running" \
"Breakpoint 2 at .*: file .*${srcfile}, line .*" \
"breakpoint on all_threads_running"
gdb_test "break hand_call" \
"Breakpoint 3 at .*: file .*${srcfile}, line .*" \
"breakpoint on hand_call"
# Run the program and make sure GDB reports that we stopped after
# hitting breakpoint 2 in all_threads_running().
gdb_test "continue" \
".*Breakpoint 2, all_threads_running ().*" \
"run to all_threads_running"
# Before we start making hand function calls, turn on scheduler locking.
gdb_test_no_output "set scheduler-locking on" "enable scheduler locking"
gdb_test "show scheduler-locking" ".* locking scheduler .* is \"on\"." "show scheduler locking on"
# Now hand-call a function in each thread, having the function
# stop without returning.
# Add one for the main thread.
set total_nr_threads [expr $NR_THREADS + 1]
# Thread numbering in gdb is origin-1, so begin numbering at 1.
for { set i 1 } { $i <= $total_nr_threads } { incr i } {
set thread_nr $i
gdb_test "thread $thread_nr" \
".*Switching to thread $thread_nr.*" \
"prepare to make hand call, thread $thread_nr"
gdb_test_multiple "call hand_call()" "" {
-re "Breakpoint 3, .*$gdb_prompt $" {
pass "hand call, thread $thread_nr"
}
-re "$gdb_prompt $" {
fail "hand call, thread $thread_nr (got gdb prompt)"
}
timeout {
# If the target fails to stop at the breakpoint, it just ends
# up in an infinite loop in hand_call(). If this happens
# and we have lost the GDB prompt, no further tests in
# this file will work and there is no point in continuing.
fail "hand call, thread $thread_nr (runaway target)"
return 0
}
}
}
# Now have each hand-called function return.
# Turn confirmation off for the "return" command.
gdb_test_no_output "set confirm off"
clear_xfail "*-*-*"
for { set i 1 } { $i <= $total_nr_threads } { incr i } {
set thread_nr $i
gdb_test "thread $thread_nr" ".*" \
"prepare to discard hand call, thread $thread_nr"
set frame_number [get_dummy_frame_number]
if { "$frame_number" == "" } {
fail "dummy stack frame number, thread $thread_nr"
# Need something.
set frame_number 0
} else {
pass "dummy stack frame number, thread $thread_nr"
}
# Pop the dummy frame.
gdb_test "frame $frame_number" ".*" "setting frame, thread $thread_nr"
gdb_test "return" ".*" "discard hand call, thread $thread_nr"
# In case getting the dummy frame number failed, re-enable for next iter.
clear_xfail "*-*-*"
}
# Make sure all dummy frames got popped.
gdb_test_multiple "maint print dummy-frames" "all dummies popped" {
-re ".*stack=.*$gdb_prompt $" {
fail "all dummies popped"
}
-re ".*$gdb_prompt $" {
pass "all dummies popped"
}
}
# Before we resume the full program, turn off scheduler locking.
gdb_test_no_output "set scheduler-locking off" "disable scheduler locking"
gdb_test "show scheduler-locking" ".* locking scheduler .* is \"off\"." "show scheduler locking off"
# Continue one last time, the program should exit normally.
#
# ??? This currently doesn't work because gdb doesn't know how to singlestep
# over reported breakpoints that weren't in the last thread to run.
# Commented out until then.
#
# For reference sake ...
# An alternative is to manually work around the issue by manually setting
# the thread back to the first thread: the program is still at the
# all_threads_running breakpoint, which wasn't the last thread to run,
# and gdb doesn't know how to singlestep over reported breakpoints that
# weren't in the last thread to run.
#gdb_test "thread 1" ".*" "set thread to 1, prepare to resume"
#
#gdb_continue_to_end "hand-call-in-threads"
return 0
|
