1 # Copyright 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
2 # Free Software Foundation, Inc.
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
6 # the Free Software Foundation; either version 3 of the License, or
7 # (at your option) any later version.
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.
14 # You should have received a copy of the GNU General Public License
15 # along with this program. If not, see <http://www.gnu.org/licenses/>.
17 # Please email any bugs, comments, and/or additions to this file to:
20 #### Dining Philosophers, on LinuxThreads - Jim Blandy <jimb@cygnus.com>
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.
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.
32 ### Other things we ought to test:
33 ### stepping a thread while others are running
34 ### killing and restarting
35 ### quitting gracefully
44 # This only works with Linux configurations.
45 if ![istarget *-*-linux-gnu*] then {
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}] != ""} {
57 gdb_reinitialize_dir $srcdir/$subdir
59 send_gdb "set print sevenbit-strings\n" ; gdb_expect -re "$gdb_prompt $"
62 # There should be no threads initially.
63 gdb_test "info threads" "" "info threads 1"
65 # Try stepping over the thread creation function.
66 gdb_breakpoint [gdb_get_line_number "linuxthreads.exp: create philosopher"]
68 for {set i 0} {$i < 5} {incr i} {
69 gdb_continue_to_breakpoint "about to create philosopher: $i"
70 send_gdb "info threads\n"
73 -re "info threads\r\n" {
76 -re "^. +(\[0-9\]+ Thread \[-0-9a-fx\]+) \[^\n\]*\n" {
77 verbose -log "found thread $expect_out(1,string)" 2
78 lappend threads_before $expect_out(1,string)
82 verbose -log "skipping line" 2
84 -re "^$gdb_prompt $" {
87 fail "(timeout) info threads before: $i"
96 -re "^ *\[_!\] \[0-9\]* \[_!\]\r\n" {
97 # Ignore program output.
98 exp_continue -continue_timer
100 -re "^\\\[New \[^\]\n\]+\\\]\[^\n\]+\n" {
104 -re "^189\[^\n\]+\n" {
107 -re "^$gdb_prompt $" {
109 -re "Program received signal.*(Unknown signal|SIGUSR|Real-time event).*$gdb_prompt $" {
110 # It would be nice if we could catch the message that GDB prints
111 # when it first notices that the thread library doesn't support
112 # debugging, or if we could explicitly ask GDB somehow.
113 unsupported "This GDB does not support threads on this system."
116 -re "$gdb_prompt $" {
119 fail "(timeout) create philosopher: $i"
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 } {
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.
138 pass "create philosopher: $i"
140 fail "create philosopher: $i"
143 send_gdb "info threads\n"
146 -re "info threads\r\n" {
149 -re "^. +(\[0-9\]+ Thread \[-0-9a-fx\]+) \[^\n\]*\n" {
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]
159 lappend threads_after $name
164 verbose -log "skipping line" 2
166 -re "^$gdb_prompt $" {
167 if { [llength $threads_before] != 0 } {
168 fail "info threads after: $i"
169 } elseif { !$i && [llength $threads_after] == 2 } {
171 pass "info threads after: $i"
172 } elseif { [llength $threads_after] == 1 } {
173 if { $expect_manager < 0 } {
176 pass "info threads after: $i"
178 fail "info threads after: $i"
182 fail "(timeout) info threads after: $i"
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"
193 set info_threads_ptn ""
194 for {set i $nthreads} {$i > 0} {incr i -1} {
195 append info_threads_ptn "$i Thread .*"
197 append info_threads_ptn "\[\r\n\]+$gdb_prompt $"
198 set info_threads_manager_ptn "[expr $nthreads + 1] Thread .*$info_threads_ptn"
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 -- $expect_manager {
205 # We weren't sure whether to expect a manager thread.
206 pass "info threads 2"
209 # We were expecting a manager thread.
210 pass "info threads 2"
213 # We were not expecting to see the manager thread.
214 fail "info threads 2"
220 -re "$info_threads_ptn" {
221 # We did not see a manager thread. Check that against what we
223 switch -exact -- $expect_manager {
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"
230 # We were expecting a manager thread, but we didn't see one.
231 fail "info threads 2"
234 # We were not expecting to see the manager thread.
235 pass "info threads 2"
243 # Try setting a thread-specific breakpoint.
244 gdb_breakpoint "print_philosopher thread 5"
245 gdb_continue_to_breakpoint "thread 5's print"
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.* \(from .*libpthread\|at pthread_create\).*" \
253 "first thread-specific breakpoint hit"
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.
258 for {set i 0} {$only_five > 0 && $i < 10} {incr i} {
259 gdb_continue_to_breakpoint "thread 5's print, pass: $i"
260 send_gdb "info threads\n"
262 -re "\\* 5 Thread .* print_philosopher .*\r\n$gdb_prompt $" {
265 -re ".*$gdb_prompt $" {
274 set name "thread-specific breakpoint is thread-specific"
275 if {$only_five == 1} { pass $name }
276 if {$only_five == 0} { fail $name }
277 if {$only_five == -1} { fail "$name (timeout)" }
280 ### Select a particular thread.
281 proc select_thread {thread} {
284 send_gdb "thread $thread\n"
286 -re "\\\[Switching to thread .*\\\].*\r\n$gdb_prompt $" {
287 pass "selected thread: $thread"
289 -re "$gdb_prompt $" {
290 fail "selected thread: $thread"
293 fail "selected thread: $thread (timeout)"
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.
307 proc check_philosopher_stack {thread seen_name} {
309 upvar $seen_name seen
311 global expect_manager manager_seen
313 set name "philosopher is distinct: $thread"
316 select_thread $thread
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)]} {
329 -re ".* in __pthread_manager \\(.*$gdb_prompt $" {
330 if {$manager_seen == 1} {
331 fail "manager thread is distinct: $thread"
334 pass "manager thread is distinct: $thread"
338 -re "pthread_start_thread.*\r\n$gdb_prompt $" {
339 ## Maybe the thread hasn't started yet.
342 -re ".* in main \\(.*$gdb_prompt $" {
343 if {$main_seen == 1} {
344 fail "main is distinct: $thread"
347 pass "main is distinct: $thread"
351 -re " in \\?\\?.*\r\n$gdb_prompt $" {
352 ## Sometimes we can't get a backtrace. I'm going to call
353 ## this a pass, since we do verify that at least one
354 ## thread was interesting, so we can get more consistent
355 ## test suite totals. But in my heart, I think it should
359 -re "$gdb_prompt $" {
363 fail "$name (timeout)"
370 set any_interesting 0
373 for {set i 1} {$i <= $nthreads} {incr i} {
374 if [check_philosopher_stack $i seen] {
375 set any_interesting 1
379 if {$any_interesting} {
380 pass "found an interesting thread"
382 fail "found an interesting thread"
385 if {$manager_seen == $expect_manager} {
386 pass "manager thread found (not found) when expected"
388 fail "manager thread found (not found) when expected"