1 # Copyright 1999-2015 Free Software Foundation, Inc.
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.
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.
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/>.
16 # Please email any bugs, comments, and/or additions to this file to:
19 #### Dining Philosophers, on LinuxThreads - Jim Blandy <jimb@cygnus.com>
21 #### At the moment, GDB's support for LinuxThreads is pretty
22 #### idiosyncratic --- GDB's output doesn't look much like the output
23 #### it produces for other thread implementations, messages appear at
24 #### different times, etc. So these tests are specific to LinuxThreads.
26 #### However, if all goes well, Linux will soon have a libthread_db
27 #### interface, and GDB will manage it the same way it does other
28 #### libthread_db-based systems. Then, we can adjust this file to
29 #### work with any such system.
31 ### Other things we ought to test:
32 ### stepping a thread while others are running
33 ### killing and restarting
34 ### quitting gracefully
37 # This only works with Linux configurations.
38 if ![istarget *-*-linux-gnu*] then {
43 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != ""} {
47 clean_restart ${binfile}
48 gdb_test_no_output "set print sevenbit-strings"
51 # There should be no threads initially.
52 gdb_test "info threads" ".*" "info threads 1"
54 # Try stepping over the thread creation function.
55 gdb_breakpoint [gdb_get_line_number "linuxthreads.exp: create philosopher"]
57 for {set i 0} {$i < 5} {incr i} {
58 gdb_continue_to_breakpoint "about to create philosopher: $i"
60 gdb_test_multiple "info threads" "info threads before: $i" {
61 -re "info threads\r\n" {
64 -re "^ *Id.*Frame *\[\r\n\]+" {
67 -re "^. +(\[0-9\]+ *Thread \[-0-9a-fx\]+) \[^\n\]*\n" {
68 verbose -log "found thread $expect_out(1,string)" 2
69 lappend threads_before $expect_out(1,string)
73 verbose -log "skipping line" 2
74 exp_continue -continue_timer
76 -re "^$gdb_prompt $" {
80 gdb_test_multiple "next" "create philosopher: $i" {
84 -re "^ *\[_!\] \[0-9\]* \[_!\]\r\n" {
85 # Ignore program output.
86 exp_continue -continue_timer
88 -re "^\\\[New \[^\]\n\]+\\\]\[^\n\]+\n" {
92 -re "^189\[^\n\]+\n" {
95 -re "^$gdb_prompt $" {
97 -re "Program received signal.*(Unknown signal|SIGUSR|Real-time event).*$gdb_prompt $" {
98 # It would be nice if we could catch the message that GDB prints
99 # when it first notices that the thread library doesn't support
100 # debugging, or if we could explicitly ask GDB somehow.
101 unsupported "This GDB does not support threads on this system."
104 -re "$gdb_prompt $" {
107 if { $threads_created == 1 } {
108 if { $expect_manager < 0 } {
111 pass "create philosopher: $i"
112 } elseif { !$i && $threads_created == 2 } {
113 # Two threads are created the first time in LinuxThreads,
114 # where the second is the manager thread. In NPTL, there is none.
116 pass "create philosopher: $i"
118 fail "create philosopher: $i"
122 gdb_test_multiple "info threads" "info threads after: $i" {
123 -re "info threads\r\n" {
126 -re "^ *Id.*Frame *\[\r\n\]+" {
129 -re "^. +(\[0-9\]+ *Thread \[-0-9a-fx\]+) \[^\n\]*\n" {
130 set name $expect_out(1,string)
131 for {set j 0} {$j != [llength $threads_before] } {incr j} {
132 if {$name == [lindex $threads_before $j]} {
133 set threads_before [lreplace $threads_before $j $j]
139 lappend threads_after $name
144 verbose -log "skipping line" 2
145 exp_continue -continue_timer
147 -re "^$gdb_prompt $" {
148 if { [llength $threads_before] != 0 } {
149 fail "info threads after: $i"
150 } elseif { !$i && [llength $threads_after] == 2 } {
152 pass "info threads after: $i"
153 } elseif { [llength $threads_after] == 1 } {
154 if { $expect_manager < 0 } {
157 pass "info threads after: $i"
159 fail "info threads after: $i"
167 # Run until there are some threads.
168 gdb_breakpoint [gdb_get_line_number "linuxthreads.exp: info threads 2"]
169 gdb_continue_to_breakpoint "main thread's sleep"
170 set info_threads_ptn ".*"
171 for {set i $nthreads} {$i > 0} {incr i -1} {
172 append info_threads_ptn "$i *Thread .*"
174 append info_threads_ptn "\[\r\n\]+$gdb_prompt $"
175 set info_threads_manager_ptn "[expr $nthreads + 1] *Thread .*$info_threads_ptn"
177 gdb_test_multiple "info threads" "info threads 2" {
178 -re "$info_threads_manager_ptn" {
179 # We did see a manager thread. Check that against what we expected.
180 switch -exact -- $expect_manager {
182 # We weren't sure whether to expect a manager thread.
183 pass "info threads 2"
186 # We were expecting a manager thread.
187 pass "info threads 2"
190 # We were not expecting to see the manager thread.
191 fail "info threads 2"
197 -re "$info_threads_ptn" {
198 # We did not see a manager thread. Check that against what we
200 switch -exact -- $expect_manager {
202 # We weren't sure whether to expect a manager thread.
203 # Don't expect it from here on out.
204 pass "info threads 2"
207 # We were expecting a manager thread, but we didn't see one.
208 fail "info threads 2"
211 # We were not expecting to see the manager thread.
212 pass "info threads 2"
220 # Try setting a thread-specific breakpoint.
221 gdb_breakpoint "print_philosopher thread 5"
222 gdb_continue_to_breakpoint "thread 5's print"
223 # When there is no debugging info available for the thread library,
224 # the backtrace entry for philosopher's caller looks like:
225 # #2 0x4001c548 in pthread_create () from /lib/libpthread.so.0
226 # If you do have debug info, the output obviously depends more on the
227 # exact library in use; under NPTL, you get:
228 # #2 0x0012b7fc in start_thread (arg=0x21) at pthread_create.c:264
229 gdb_test "where" "print_philosopher.*philosopher.* \(from .*libpthread\|at pthread_create\|in pthread_create\).*" \
230 "first thread-specific breakpoint hit"
232 # Make sure it's catching the right thread. Try hitting the
233 # breakpoint ten times, and make sure we don't get anyone else.
235 for {set i 0} {$only_five > 0 && $i < 10} {incr i} {
236 gdb_continue_to_breakpoint "thread 5's print, pass: $i"
237 gdb_test_multiple "info threads" "" {
238 -re "\[*\] 5 *Thread .* +print_philosopher .*\r\n$gdb_prompt $" {
241 -re ".*$gdb_prompt $" {
250 set name "thread-specific breakpoint is thread-specific"
251 if {$only_five == 1} { pass $name }
252 if {$only_five == 0} { fail $name }
253 if {$only_five == -1} { fail "$name (timeout)" }
256 ### Select a particular thread.
257 proc select_thread {thread} {
260 gdb_test "thread $thread" \
261 "\\\[Switching to thread .*\\\].*" \
262 "selected thread: $thread"
265 ### Select THREAD, check for a plausible backtrace, and make sure
266 ### we're actually selecting a different philosopher each time.
267 ### Return true if the thread had a stack which was not only
268 ### acceptable, but interesting. SEEN should be an array in which
269 ### SEEN(N) exists iff we have found philosopher number N before.
274 proc check_philosopher_stack {thread seen_name} {
276 upvar $seen_name seen
278 global expect_manager manager_seen
280 set name "philosopher is distinct: $thread"
283 select_thread $thread
284 gdb_test_multiple "where" "$name" {
285 -re ".* in philosopher \\(data=(0x\[0-9a-f\]+).*\r\n$gdb_prompt $" {
286 set data $expect_out(1,string)
287 if {[info exists seen($data)]} {
295 -re ".* in __pthread_manager \\(.*$gdb_prompt $" {
296 if {$manager_seen == 1} {
297 fail "manager thread is distinct: $thread"
300 pass "manager thread is distinct: $thread"
304 -re "pthread_start_thread.*\r\n$gdb_prompt $" {
305 ## Maybe the thread hasn't started yet.
308 -re ".* in main \\(.*$gdb_prompt $" {
309 if {$main_seen == 1} {
310 fail "main is distinct: $thread"
313 pass "main is distinct: $thread"
317 -re " in \\?\\?.*\r\n$gdb_prompt $" {
318 ## Sometimes we can't get a backtrace. I'm going to call
319 ## this a pass, since we do verify that at least one
320 ## thread was interesting, so we can get more consistent
321 ## test suite totals. But in my heart, I think it should
330 set any_interesting 0
333 for {set i 1} {$i <= $nthreads} {incr i} {
334 if [check_philosopher_stack $i seen] {
335 set any_interesting 1
340 if {$any_interesting} {
341 pass "found an interesting thread"
343 fail "found an interesting thread"
346 if {$manager_seen == $expect_manager} {
347 pass "manager thread found (not found) when expected"
349 fail "manager thread found (not found) when expected"