1 # tls.exp -- Expect script to test thread-local storage
2 # Copyright (C) 1992, 2003, 2007, 2008 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/>. */
18 set srcfile ${testfile}.c
19 set binfile ${objdir}/${subdir}/${testfile}
21 if [istarget "*-*-linux"] then {
22 set target_cflags "-D_MIT_POSIX_THREADS"
27 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}"]] != "" } {
31 ### Compute the value of the a_thread_local variable.
32 proc compute_expected_value {value} {
35 while { $i <= $value} {
36 incr expected_value $i
39 return $expected_value
42 ### Get the value of the variable 'me' for the current thread.
43 proc get_me_variable {tnum} {
51 -re ".*= ($decimal).*\r\n$gdb_prompt $" {
52 set value_of_me $expect_out(1,string)
53 pass "$tnum thread print me"
56 fail "$tnum thread print me"
59 fail "$tnum thread print me (timeout)"
65 ### Check the values of the thread local variables in the thread.
66 ### Also check that info address print the right things.
67 proc check_thread_local {number} {
68 set me_variable [get_me_variable $number]
69 set expected_value [compute_expected_value ${me_variable}]
71 gdb_test "p a_thread_local" \
73 "${number} thread local storage"
75 gdb_test "p another_thread_local" \
77 "${number} another thread local storage"
79 gdb_test "info address a_thread_local" \
80 ".*a_thread_local.*a thread-local variable at offset.*" \
81 "${number} info address a_thread_local"
83 gdb_test "info address another_thread_local" \
84 ".*another_thread_local.*a thread-local variable at offset.*" \
85 "${number} info address another_thread_local"
88 ### Select a particular thread.
89 proc select_thread {thread} {
92 send_gdb "thread $thread\n"
94 -re "\\\[Switching to thread .*\\\].*\r\n$gdb_prompt $" {
95 pass "selected thread: $thread"
98 fail "selected thread: $thread"
101 fail "selected thread: $thread (timeout)"
106 ### Do a backtrace for the current thread, and check that the 'spin' routine
107 ### is in it. This means we have one of the threads we created, rather
108 ### than the main thread. Record the thread in the spin_threads
109 ### array. Also remember the level of the 'spin' routine in the backtrace, for
111 proc check_thread_stack {number spin_threads spin_threads_level} {
116 upvar $spin_threads tarr
117 upvar $spin_threads_level tarrl
119 select_thread $number
122 -re ".*(\[0-9\]+)\[ \t\]+$hex in spin \\(vp=(0x\[0-9a-f\]+).*\r\n$gdb_prompt $" {
123 if {[info exists tarr($number)]} {
124 fail "backtrace of thread number $number in spin"
126 pass "backtrace of thread number $number in spin"
127 set level $expect_out(1,string)
128 set tarrl($number) $level
132 -re ".*$gdb_prompt $" {
135 pass "backtrace of thread number $number not relevant"
138 fail "backtrace of thread number $number (timeout)"
145 gdb_reinitialize_dir $srcdir/$subdir
148 if ![runto_main] then {
149 fail "Can't run to main"
153 # Set a breakpoint at the "spin" routine to
154 # test the thread local's value.
156 gdb_test "b [gdb_get_line_number "here we know tls value"]" \
157 ".*Breakpoint 2.*tls.*" "set breakpoint at all threads"
159 # Set a bp at a point where we know all threads are alive.
161 gdb_test "b [gdb_get_line_number "still alive"]" \
162 ".*Breakpoint 3.*tls.*" "set breakpoint at synch point"
164 # Set a bp at the end to see if all threads are finished.
166 gdb_test "b [gdb_get_line_number "before exit"]" \
167 ".*Breakpoint 4.*tls.*" "set breakpoint at exit"
169 send_gdb "continue\n"
171 -re ".*Program received signal SIGSEGV.*a_thread_local = 0;.*$gdb_prompt $" {
172 # This is the first symptom if the gcc and binutils versions
173 # in use support TLS, but the system glibc does not.
174 unsupported "continue to first thread: system does not support TLS"
177 -re ".*Program exited normally.*$gdb_prompt $" {
178 fail "continue to first thread: program runaway"
180 -re ".*Pass 0 done.*Pass 1 done.*$gdb_prompt $" {
181 fail "continue to first thread: program runaway 2"
183 -re ".*Breakpoint 2.*tls value.*$gdb_prompt $" {
184 pass "continue to first thread: get to thread"
186 -re ".*$gdb_prompt $" {
187 fail "continue to first thread: no progress?"
189 timeout { fail "continue to first thread (timeout)" }
192 gdb_test "info thread" ".*Thread.*spin.*" \
193 "at least one th in spin while stopped at first th"
195 check_thread_local "first"
197 gdb_test "continue" ".*Breakpoint 2.*tls value.*" "continue to second thread"
198 gdb_test "info thread" "Thread.*spin.*" \
199 "at least one th in spin while stopped at second th"
201 check_thread_local "second"
203 gdb_test "continue" ".*Breakpoint 2.*tls value.*" "continue to third thread"
204 gdb_test "info thread" ".*Thread.*spin.*" \
205 "at least one th in spin while stopped at third th"
207 check_thread_local "third"
209 gdb_test "continue" ".*Breakpoint 3.*still alive.*" "continue to synch point"
212 send_gdb "info thread\n"
214 -re "^info thread\[ \t\r\n\]+(\[0-9\]+) Thread.*$gdb_prompt $" {
215 set no_of_threads $expect_out(1,string)
216 pass "get number of threads"
218 -re "$gdb_prompt $" {
219 fail "get number of threads"
222 fail "get number of threads (timeout)"
226 array set spin_threads {}
228 array set spin_threads_level {}
229 unset spin_threads_level
231 # For each thread check its backtrace to see if it is stopped at the
233 for {set i 1} {$i <= $no_of_threads} {incr i} {
234 check_thread_stack $i spin_threads spin_threads_level
237 ### Loop through the threads and check the values of the tls variables.
238 ### keep track of how many threads we find in the spin routine.
240 foreach i [array names spin_threads] {
241 if {$spin_threads($i) == 1} {
244 set level $spin_threads_level($i)
245 # We expect to be in sem_wait, but if the thread has not yet
246 # been scheduled, we might be in sem_post still. We could be at
247 # any intermediate point in spin, too, but that is much less
249 gdb_test "up $level" ".*spin.*sem_(wait|post).*" "thread $i up"
250 check_thread_local $i
254 if {$thrs_in_spin == 0} {
255 fail "No thread backtrace reported spin (vsyscall kernel problem?)"
258 gdb_test "continue" ".*Breakpoint 4.*before exit.*" "threads exited"
260 send_gdb "info thread\n"
262 -re ".* 1 Thread.*2 Thread.*$gdb_prompt $" {
263 fail "Too many threads left at end"
265 -re ".*\\\* 1 Thread.*main.*$gdb_prompt $" {
266 pass "Expect only base thread at end"
268 -re ".*No stack.*$gdb_prompt $" {
269 fail "runaway at end"
271 -re ".*$gdb_prompt $" {
274 timeout { fail "at end (timeout)" }
277 # Start over and do some "info address" stuff
281 gdb_test "info address a_global" \
282 ".*a_global.*static storage at address.*" "info address a_global"
284 setup_kfail "gdb/1294" "*-*-*"
285 gdb_test "info address me" ".*me.*is a variable at offset.*" "info address me"