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9b254dd1 | 1 | # Copyright 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
2fa63963 | 2 | # Free Software Foundation, Inc. |
917317f4 JM |
3 | |
4 | # This program is free software; you can redistribute it and/or modify | |
5 | # it under the terms of the GNU General Public License as published by | |
e22f8b7c | 6 | # the Free Software Foundation; either version 3 of the License, or |
917317f4 | 7 | # (at your option) any later version. |
e22f8b7c | 8 | # |
917317f4 JM |
9 | # This program is distributed in the hope that it will be useful, |
10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | # GNU General Public License for more details. | |
e22f8b7c | 13 | # |
917317f4 | 14 | # You should have received a copy of the GNU General Public License |
e22f8b7c | 15 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
917317f4 JM |
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. | |
c3b69c04 | 45 | if ![istarget *-*-linux-gnu*] then { |
917317f4 JM |
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" | |
fcfcc2b5 NS |
70 | send_gdb "info threads\n" |
71 | set threads_before {} | |
72 | gdb_expect { | |
73 | -re "info threads\r\n" { | |
74 | exp_continue | |
75 | } | |
af2cbe8c | 76 | -re "^. +(\[0-9\]+ Thread \[-0-9a-fx\]+) \[^\n\]*\n" { |
fcfcc2b5 NS |
77 | verbose -log "found thread $expect_out(1,string)" 2 |
78 | lappend threads_before $expect_out(1,string) | |
79 | exp_continue | |
80 | } | |
ac6c2fba NS |
81 | -re "^\[^\n\]*\n" { |
82 | verbose -log "skipping line" 2 | |
83 | } | |
fcfcc2b5 NS |
84 | -re "^$gdb_prompt $" { |
85 | } | |
86 | timeout { | |
ac6c2fba | 87 | fail "(timeout) info threads before: $i" |
fcfcc2b5 NS |
88 | } |
89 | } | |
c2d11a7d | 90 | send_gdb "next\n" |
fcfcc2b5 | 91 | set threads_created 0 |
c2d11a7d | 92 | gdb_expect { |
fcfcc2b5 NS |
93 | -re "^next\r\n" { |
94 | exp_continue | |
85e85163 | 95 | } |
2fa63963 DJ |
96 | -re "^ *\[_!\] \[0-9\]* \[_!\]\r\n" { |
97 | # Ignore program output. | |
98 | exp_continue -continue_timer | |
99 | } | |
fcfcc2b5 NS |
100 | -re "^\\\[New \[^\]\n\]+\\\]\[^\n\]+\n" { |
101 | incr threads_created | |
102 | exp_continue | |
103 | } | |
104 | -re "^189\[^\n\]+\n" { | |
105 | exp_continue | |
106 | } | |
107 | -re "^$gdb_prompt $" { | |
c2d11a7d | 108 | } |
754cbe1c | 109 | -re "Program received signal.*(Unknown signal|SIGUSR|Real-time event).*$gdb_prompt $" { |
c2d11a7d JM |
110 | # It would be nice if we could catch the message that GDB prints |
111 | # when it first notices that the thread library doesn't support | |
112 | # debugging, or if we could explicitly ask GDB somehow. | |
113 | unsupported "This GDB does not support threads on this system." | |
114 | return -1 | |
115 | } | |
116 | -re "$gdb_prompt $" { | |
c2d11a7d JM |
117 | } |
118 | timeout { | |
119 | fail "(timeout) create philosopher: $i" | |
120 | } | |
121 | } | |
fcfcc2b5 NS |
122 | if { $threads_created == 0 } { |
123 | # Not all targets announce new threads as they are created. | |
124 | # For example, the GDB | |
125 | # remote protocol target only finds out about threads when | |
126 | # they actually report some event like a breakpoint hit, | |
127 | # or when the user types 'info threads'. | |
128 | unsupported "create philosopher: $i" | |
129 | } elseif { $threads_created == 1 } { | |
130 | if { $expect_manager < 0 } { | |
131 | set expect_manager 0 | |
132 | } | |
133 | pass "create philosopher: $i" | |
134 | } elseif { !$i && $threads_created == 2 } { | |
135 | # Two threads are created the first time in LinuxThreads, | |
136 | # where the second is the manager thread. In NPTL, there is none. | |
137 | set expect_manager 1 | |
138 | pass "create philosopher: $i" | |
139 | } else { | |
140 | fail "create philosopher: $i" | |
141 | } | |
142 | ||
143 | send_gdb "info threads\n" | |
144 | set threads_after {} | |
145 | gdb_expect { | |
146 | -re "info threads\r\n" { | |
147 | exp_continue | |
148 | } | |
af2cbe8c | 149 | -re "^. +(\[0-9\]+ Thread \[-0-9a-fx\]+) \[^\n\]*\n" { |
fcfcc2b5 NS |
150 | set name $expect_out(1,string) |
151 | for {set j 0} {$j != [llength $threads_before] } {incr j} { | |
152 | if {$name == [lindex $threads_before $j]} { | |
153 | set threads_before [lreplace $threads_before $j $j] | |
154 | set name "" | |
155 | break | |
156 | } | |
157 | } | |
158 | if { $name != "" } { | |
159 | lappend threads_after $name | |
160 | } | |
161 | exp_continue | |
162 | } | |
ac6c2fba NS |
163 | -re "^\[^\n\]*\n" { |
164 | verbose -log "skipping line" 2 | |
165 | } | |
fcfcc2b5 NS |
166 | -re "^$gdb_prompt $" { |
167 | if { [llength $threads_before] != 0 } { | |
ac6c2fba | 168 | fail "info threads after: $i" |
fcfcc2b5 NS |
169 | } elseif { !$i && [llength $threads_after] == 2 } { |
170 | set expect_manager 1 | |
ac6c2fba | 171 | pass "info threads after: $i" |
fcfcc2b5 NS |
172 | } elseif { [llength $threads_after] == 1 } { |
173 | if { $expect_manager < 0 } { | |
174 | set expect_manager 0 | |
175 | } | |
ac6c2fba | 176 | pass "info threads after: $i" |
fcfcc2b5 | 177 | } else { |
ac6c2fba | 178 | fail "info threads after: $i" |
fcfcc2b5 NS |
179 | } |
180 | } | |
181 | timeout { | |
ac6c2fba | 182 | fail "(timeout) info threads after: $i" |
fcfcc2b5 NS |
183 | } |
184 | } | |
185 | ||
917317f4 JM |
186 | } |
187 | ||
f10b16d4 | 188 | set nthreads 6 |
85e85163 | 189 | |
917317f4 JM |
190 | # Run until there are some threads. |
191 | gdb_breakpoint [gdb_get_line_number "linuxthreads.exp: info threads 2"] | |
192 | gdb_continue_to_breakpoint "main thread's sleep" | |
85e85163 JJ |
193 | set info_threads_ptn "" |
194 | for {set i $nthreads} {$i > 0} {incr i -1} { | |
195 | append info_threads_ptn "$i Thread .*" | |
196 | } | |
f10b16d4 JB |
197 | append info_threads_ptn "\[\r\n\]+$gdb_prompt $" |
198 | set info_threads_manager_ptn "[expr $nthreads + 1] Thread .*$info_threads_ptn" | |
199 | ||
200 | gdb_test_multiple "info threads" "info threads 2" { | |
201 | -re "$info_threads_manager_ptn" { | |
202 | # We did see a manager thread. Check that against what we expected. | |
203 | switch -exact -- $expect_manager { | |
204 | -1 { | |
205 | # We weren't sure whether to expect a manager thread. | |
206 | pass "info threads 2" | |
207 | } | |
208 | 1 { | |
209 | # We were expecting a manager thread. | |
210 | pass "info threads 2" | |
211 | } | |
212 | 0 { | |
213 | # We were not expecting to see the manager thread. | |
214 | fail "info threads 2" | |
215 | } | |
216 | } | |
217 | set expect_manager 1 | |
218 | incr nthreads | |
219 | } | |
220 | -re "$info_threads_ptn" { | |
221 | # We did not see a manager thread. Check that against what we | |
222 | # expected. | |
223 | switch -exact -- $expect_manager { | |
224 | -1 { | |
225 | # We weren't sure whether to expect a manager thread. | |
226 | # Don't expect it from here on out. | |
227 | pass "info threads 2" | |
228 | } | |
229 | 1 { | |
230 | # We were expecting a manager thread, but we didn't see one. | |
231 | fail "info threads 2" | |
232 | } | |
233 | 0 { | |
234 | # We were not expecting to see the manager thread. | |
235 | pass "info threads 2" | |
236 | } | |
237 | } | |
238 | set expect_manager 0 | |
239 | } | |
240 | } | |
241 | ||
917317f4 JM |
242 | |
243 | # Try setting a thread-specific breakpoint. | |
244 | gdb_breakpoint "print_philosopher thread 5" | |
245 | gdb_continue_to_breakpoint "thread 5's print" | |
f10b16d4 JB |
246 | # When there is no debugging info available for the thread library, |
247 | # the backtrace entry for philosopher's caller looks like: | |
248 | # #1 0x4001c548 in pthread_create () from /lib/libpthread.so.0 | |
249 | # If you do have debug info, the output obviously depends more on the | |
250 | # exact library in use; under NPTL, you get: | |
251 | # #2 0x0012b7fc in start_thread (arg=0x21) at pthread_create.c:264 | |
252 | gdb_test "where" "print_philosopher.*philosopher.* \(from .*libpthread\|at pthread_create\).*" \ | |
917317f4 JM |
253 | "first thread-specific breakpoint hit" |
254 | ||
255 | # Make sure it's catching the right thread. Try hitting the | |
256 | # breakpoint ten times, and make sure we don't get anyone else. | |
257 | set only_five 1 | |
258 | for {set i 0} {$only_five > 0 && $i < 10} {incr i} { | |
259 | gdb_continue_to_breakpoint "thread 5's print, pass: $i" | |
260 | send_gdb "info threads\n" | |
261 | gdb_expect { | |
262 | -re "\\* 5 Thread .* print_philosopher .*\r\n$gdb_prompt $" { | |
263 | # Okay this time. | |
264 | } | |
265 | -re ".*$gdb_prompt $" { | |
266 | set only_five 0 | |
267 | } | |
268 | timeout { | |
269 | set only_five -1 | |
270 | } | |
271 | } | |
272 | } | |
273 | ||
274 | set name "thread-specific breakpoint is thread-specific" | |
275 | if {$only_five == 1} { pass $name } | |
276 | if {$only_five == 0} { fail $name } | |
277 | if {$only_five == -1} { fail "$name (timeout)" } | |
278 | ||
279 | ||
280 | ### Select a particular thread. | |
281 | proc select_thread {thread} { | |
282 | global gdb_prompt | |
283 | ||
284 | send_gdb "thread $thread\n" | |
285 | gdb_expect { | |
286 | -re "\\\[Switching to thread .*\\\].*\r\n$gdb_prompt $" { | |
287 | pass "selected thread: $thread" | |
288 | } | |
289 | -re "$gdb_prompt $" { | |
290 | fail "selected thread: $thread" | |
291 | } | |
292 | timeout { | |
293 | fail "selected thread: $thread (timeout)" | |
294 | } | |
295 | } | |
296 | } | |
297 | ||
298 | ### Select THREAD, check for a plausible backtrace, and make sure | |
299 | ### we're actually selecting a different philosopher each time. | |
300 | ### Return true if the thread had a stack which was not only | |
301 | ### acceptable, but interesting. SEEN should be an array in which | |
302 | ### SEEN(N) exists iff we have found philosopher number N before. | |
ac55707e MS |
303 | |
304 | set main_seen 0 | |
305 | set manager_seen 0 | |
306 | ||
917317f4 JM |
307 | proc check_philosopher_stack {thread seen_name} { |
308 | global gdb_prompt | |
309 | upvar $seen_name seen | |
ac55707e | 310 | global main_seen |
85e85163 | 311 | global expect_manager manager_seen |
917317f4 JM |
312 | |
313 | set name "philosopher is distinct: $thread" | |
314 | set interesting 0 | |
315 | ||
316 | select_thread $thread | |
317 | send_gdb "where\n" | |
318 | gdb_expect { | |
319 | -re ".* in philosopher \\(data=(0x\[0-9a-f\]+).*\r\n$gdb_prompt $" { | |
320 | set data $expect_out(1,string) | |
321 | if {[info exists seen($data)]} { | |
322 | fail $name | |
323 | } else { | |
324 | pass $name | |
325 | set seen($data) yep | |
326 | } | |
327 | set interesting 1 | |
328 | } | |
396cc255 DJ |
329 | -re ".* in __pthread_manager \\(.*$gdb_prompt $" { |
330 | if {$manager_seen == 1} { | |
331 | fail "manager thread is distinct: $thread" | |
332 | } else { | |
333 | set manager_seen 1 | |
334 | pass "manager thread is distinct: $thread" | |
335 | } | |
336 | set interesting 1 | |
337 | } | |
917317f4 JM |
338 | -re "pthread_start_thread.*\r\n$gdb_prompt $" { |
339 | ## Maybe the thread hasn't started yet. | |
340 | pass $name | |
341 | } | |
ac55707e MS |
342 | -re ".* in main \\(.*$gdb_prompt $" { |
343 | if {$main_seen == 1} { | |
344 | fail "main is distinct: $thread" | |
345 | } else { | |
346 | set main_seen 1 | |
347 | pass "main is distinct: $thread" | |
348 | } | |
349 | set interesting 1 | |
350 | } | |
917317f4 JM |
351 | -re " in \\?\\?.*\r\n$gdb_prompt $" { |
352 | ## Sometimes we can't get a backtrace. I'm going to call | |
353 | ## this a pass, since we do verify that at least one | |
354 | ## thread was interesting, so we can get more consistent | |
355 | ## test suite totals. But in my heart, I think it should | |
356 | ## be an xfail. | |
357 | pass $name | |
358 | } | |
359 | -re "$gdb_prompt $" { | |
360 | fail $name | |
361 | } | |
362 | timeout { | |
363 | fail "$name (timeout)" | |
364 | } | |
365 | } | |
366 | ||
367 | return $interesting | |
368 | } | |
369 | ||
370 | set any_interesting 0 | |
6ff9af88 DJ |
371 | array set seen {} |
372 | unset seen | |
85e85163 | 373 | for {set i 1} {$i <= $nthreads} {incr i} { |
917317f4 JM |
374 | if [check_philosopher_stack $i seen] { |
375 | set any_interesting 1 | |
376 | } | |
377 | } | |
378 | ||
379 | if {$any_interesting} { | |
380 | pass "found an interesting thread" | |
381 | } else { | |
382 | fail "found an interesting thread" | |
383 | } | |
85e85163 JJ |
384 | |
385 | if {$manager_seen == $expect_manager} { | |
386 | pass "manager thread found (not found) when expected" | |
387 | } else { | |
388 | fail "manager thread found (not found) when expected" | |
389 | } |