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b5ab8ff3 | 1 | # Copyright 1999, 2001, 2002, 2003 Free Software Foundation, Inc. |
917317f4 JM |
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 2 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, write to the Free Software | |
15 | # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
16 | ||
17 | # Please email any bugs, comments, and/or additions to this file to: | |
18 | # bug-gdb@gnu.org | |
19 | ||
20 | #### Dining Philosophers, on LinuxThreads - Jim Blandy <jimb@cygnus.com> | |
21 | #### | |
22 | #### At the moment, GDB's support for LinuxThreads is pretty | |
23 | #### idiosyncratic --- GDB's output doesn't look much like the output | |
24 | #### it produces for other thread implementations, messages appear at | |
25 | #### different times, etc. So these tests are specific to LinuxThreads. | |
26 | #### | |
27 | #### However, if all goes well, Linux will soon have a libthread_db | |
28 | #### interface, and GDB will manage it the same way it does other | |
29 | #### libthread_db-based systems. Then, we can adjust this file to | |
30 | #### work with any such system. | |
31 | ||
32 | ### Other things we ought to test: | |
33 | ### stepping a thread while others are running | |
34 | ### killing and restarting | |
35 | ### quitting gracefully | |
36 | ||
37 | if $tracelevel then { | |
38 | strace $tracelevel | |
39 | } | |
40 | ||
41 | set prms_id 0 | |
42 | set bug_id 0 | |
43 | ||
44 | # This only works with Linux configurations. | |
45 | if ![istarget *-*-linux-gnu] then { | |
46 | return | |
47 | } | |
48 | ||
49 | set testfile "linux-dp" | |
50 | set srcfile ${testfile}.c | |
51 | set binfile ${objdir}/${subdir}/${testfile} | |
52 | if {[gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug libs=-lpthread}] != ""} { | |
b5ab8ff3 | 53 | return -1 |
917317f4 JM |
54 | } |
55 | ||
56 | gdb_start | |
57 | gdb_reinitialize_dir $srcdir/$subdir | |
58 | gdb_load ${binfile} | |
59 | send_gdb "set print sevenbit-strings\n" ; gdb_expect -re "$gdb_prompt $" | |
60 | runto_main | |
61 | ||
62 | # There should be no threads initially. | |
63 | gdb_test "info threads" "" "info threads 1" | |
64 | ||
65 | # Try stepping over the thread creation function. | |
66 | gdb_breakpoint [gdb_get_line_number "linuxthreads.exp: create philosopher"] | |
85e85163 | 67 | set expect_manager -1 |
917317f4 JM |
68 | for {set i 0} {$i < 5} {incr i} { |
69 | gdb_continue_to_breakpoint "about to create philosopher: $i" | |
c2d11a7d JM |
70 | send_gdb "next\n" |
71 | gdb_expect { | |
85e85163 JJ |
72 | -re "\\\[New .*\\\].*\\\[New .*\\\].*$gdb_prompt $" { |
73 | # Two threads are created the first time in LinuxThreads, | |
74 | # where the second is the manager thread. In NPTL, there is none. | |
75 | if {$i == 0} { | |
76 | set expect_manager 1 | |
77 | } | |
78 | pass "create philosopher: $i" | |
79 | } | |
ed9a39eb | 80 | -re "\\\[New .*\\\].*$gdb_prompt $" { |
85e85163 JJ |
81 | if {$i == 0} { |
82 | set expect_manager 0 | |
83 | } | |
c2d11a7d JM |
84 | pass "create philosopher: $i" |
85 | } | |
754cbe1c | 86 | -re "Program received signal.*(Unknown signal|SIGUSR|Real-time event).*$gdb_prompt $" { |
c2d11a7d JM |
87 | # It would be nice if we could catch the message that GDB prints |
88 | # when it first notices that the thread library doesn't support | |
89 | # debugging, or if we could explicitly ask GDB somehow. | |
90 | unsupported "This GDB does not support threads on this system." | |
91 | return -1 | |
92 | } | |
93 | -re "$gdb_prompt $" { | |
94 | fail "create philosopher: $i" | |
95 | } | |
96 | timeout { | |
97 | fail "(timeout) create philosopher: $i" | |
98 | } | |
99 | } | |
917317f4 JM |
100 | } |
101 | ||
85e85163 JJ |
102 | if {$expect_manager} { |
103 | set nthreads 7 | |
104 | } else { | |
105 | set nthreads 6 | |
106 | } | |
107 | ||
917317f4 JM |
108 | # Run until there are some threads. |
109 | gdb_breakpoint [gdb_get_line_number "linuxthreads.exp: info threads 2"] | |
110 | gdb_continue_to_breakpoint "main thread's sleep" | |
85e85163 JJ |
111 | set info_threads_ptn "" |
112 | for {set i $nthreads} {$i > 0} {incr i -1} { | |
113 | append info_threads_ptn "$i Thread .*" | |
114 | } | |
115 | gdb_test "info threads" $info_threads_ptn "info threads 2" | |
917317f4 JM |
116 | |
117 | # Try setting a thread-specific breakpoint. | |
118 | gdb_breakpoint "print_philosopher thread 5" | |
119 | gdb_continue_to_breakpoint "thread 5's print" | |
85e85163 | 120 | gdb_test "where" "print_philosopher.*philosopher.* from .*libpthread.*" \ |
917317f4 JM |
121 | "first thread-specific breakpoint hit" |
122 | ||
123 | # Make sure it's catching the right thread. Try hitting the | |
124 | # breakpoint ten times, and make sure we don't get anyone else. | |
125 | set only_five 1 | |
126 | for {set i 0} {$only_five > 0 && $i < 10} {incr i} { | |
127 | gdb_continue_to_breakpoint "thread 5's print, pass: $i" | |
128 | send_gdb "info threads\n" | |
129 | gdb_expect { | |
130 | -re "\\* 5 Thread .* print_philosopher .*\r\n$gdb_prompt $" { | |
131 | # Okay this time. | |
132 | } | |
133 | -re ".*$gdb_prompt $" { | |
134 | set only_five 0 | |
135 | } | |
136 | timeout { | |
137 | set only_five -1 | |
138 | } | |
139 | } | |
140 | } | |
141 | ||
142 | set name "thread-specific breakpoint is thread-specific" | |
143 | if {$only_five == 1} { pass $name } | |
144 | if {$only_five == 0} { fail $name } | |
145 | if {$only_five == -1} { fail "$name (timeout)" } | |
146 | ||
147 | ||
148 | ### Select a particular thread. | |
149 | proc select_thread {thread} { | |
150 | global gdb_prompt | |
151 | ||
152 | send_gdb "thread $thread\n" | |
153 | gdb_expect { | |
154 | -re "\\\[Switching to thread .*\\\].*\r\n$gdb_prompt $" { | |
155 | pass "selected thread: $thread" | |
156 | } | |
157 | -re "$gdb_prompt $" { | |
158 | fail "selected thread: $thread" | |
159 | } | |
160 | timeout { | |
161 | fail "selected thread: $thread (timeout)" | |
162 | } | |
163 | } | |
164 | } | |
165 | ||
166 | ### Select THREAD, check for a plausible backtrace, and make sure | |
167 | ### we're actually selecting a different philosopher each time. | |
168 | ### Return true if the thread had a stack which was not only | |
169 | ### acceptable, but interesting. SEEN should be an array in which | |
170 | ### SEEN(N) exists iff we have found philosopher number N before. | |
ac55707e MS |
171 | |
172 | set main_seen 0 | |
173 | set manager_seen 0 | |
174 | ||
917317f4 JM |
175 | proc check_philosopher_stack {thread seen_name} { |
176 | global gdb_prompt | |
177 | upvar $seen_name seen | |
ac55707e | 178 | global main_seen |
85e85163 | 179 | global expect_manager manager_seen |
917317f4 JM |
180 | |
181 | set name "philosopher is distinct: $thread" | |
182 | set interesting 0 | |
183 | ||
184 | select_thread $thread | |
185 | send_gdb "where\n" | |
186 | gdb_expect { | |
187 | -re ".* in philosopher \\(data=(0x\[0-9a-f\]+).*\r\n$gdb_prompt $" { | |
188 | set data $expect_out(1,string) | |
189 | if {[info exists seen($data)]} { | |
190 | fail $name | |
191 | } else { | |
192 | pass $name | |
193 | set seen($data) yep | |
194 | } | |
195 | set interesting 1 | |
196 | } | |
396cc255 DJ |
197 | -re ".* in __pthread_manager \\(.*$gdb_prompt $" { |
198 | if {$manager_seen == 1} { | |
199 | fail "manager thread is distinct: $thread" | |
200 | } else { | |
201 | set manager_seen 1 | |
202 | pass "manager thread is distinct: $thread" | |
203 | } | |
204 | set interesting 1 | |
205 | } | |
917317f4 JM |
206 | -re "pthread_start_thread.*\r\n$gdb_prompt $" { |
207 | ## Maybe the thread hasn't started yet. | |
208 | pass $name | |
209 | } | |
ac55707e MS |
210 | -re ".* in main \\(.*$gdb_prompt $" { |
211 | if {$main_seen == 1} { | |
212 | fail "main is distinct: $thread" | |
213 | } else { | |
214 | set main_seen 1 | |
215 | pass "main is distinct: $thread" | |
216 | } | |
217 | set interesting 1 | |
218 | } | |
917317f4 JM |
219 | -re " in \\?\\?.*\r\n$gdb_prompt $" { |
220 | ## Sometimes we can't get a backtrace. I'm going to call | |
221 | ## this a pass, since we do verify that at least one | |
222 | ## thread was interesting, so we can get more consistent | |
223 | ## test suite totals. But in my heart, I think it should | |
224 | ## be an xfail. | |
225 | pass $name | |
226 | } | |
227 | -re "$gdb_prompt $" { | |
228 | fail $name | |
229 | } | |
230 | timeout { | |
231 | fail "$name (timeout)" | |
232 | } | |
233 | } | |
234 | ||
235 | return $interesting | |
236 | } | |
237 | ||
238 | set any_interesting 0 | |
6ff9af88 DJ |
239 | array set seen {} |
240 | unset seen | |
85e85163 | 241 | for {set i 1} {$i <= $nthreads} {incr i} { |
917317f4 JM |
242 | if [check_philosopher_stack $i seen] { |
243 | set any_interesting 1 | |
244 | } | |
245 | } | |
246 | ||
247 | if {$any_interesting} { | |
248 | pass "found an interesting thread" | |
249 | } else { | |
250 | fail "found an interesting thread" | |
251 | } | |
85e85163 JJ |
252 | |
253 | if {$manager_seen == $expect_manager} { | |
254 | pass "manager thread found (not found) when expected" | |
255 | } else { | |
256 | fail "manager thread found (not found) when expected" | |
257 | } |