1 # tls.exp -- Expect script to test thread-local storage
2 # Copyright (C) 1992, 2003, 2007-2012 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/>. */
19 set srcfile ${testfile}.c
20 set srcfile2 ${testfile2}.c
21 set binfile ${objdir}/${subdir}/${testfile}
23 if [istarget "*-*-linux"] then {
24 set target_cflags "-D_MIT_POSIX_THREADS"
29 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile} ${srcdir}/${subdir}/${srcfile2}" "${binfile}" executable [list c++ debug "incdir=${objdir}"]] != "" } {
33 ### Compute the value of the a_thread_local variable.
34 proc compute_expected_value {value} {
37 while { $i <= $value} {
38 incr expected_value $i
41 return $expected_value
44 ### Get the value of the variable 'me' for the current thread.
45 proc get_me_variable {tnum} {
53 -re ".*= ($decimal).*\r\n$gdb_prompt $" {
54 set value_of_me $expect_out(1,string)
55 pass "$tnum thread print me"
58 fail "$tnum thread print me"
61 fail "$tnum thread print me (timeout)"
67 ### Check the values of the thread local variables in the thread.
68 ### Also check that info address print the right things.
69 proc check_thread_local {number} {
70 set me_variable [get_me_variable $number]
71 set expected_value [compute_expected_value ${me_variable}]
73 gdb_test "p a_thread_local" \
75 "${number} thread local storage"
77 gdb_test "p K::another_thread_local" \
79 "${number} another thread local storage"
81 gdb_test "info address a_thread_local" \
82 ".*a_thread_local.*a thread-local variable at offset.*" \
83 "${number} info address a_thread_local"
85 gdb_test "info address K::another_thread_local" \
86 ".*another_thread_local.*a thread-local variable at offset.*" \
87 "${number} info address another_thread_local"
90 ### Select a particular thread.
91 proc select_thread {thread} {
94 send_gdb "thread $thread\n"
96 -re "\\\[Switching to thread .*\\\].*\r\n$gdb_prompt $" {
97 pass "selected thread: $thread"
100 fail "selected thread: $thread"
103 fail "selected thread: $thread (timeout)"
108 ### Do a backtrace for the current thread, and check that the 'spin' routine
109 ### is in it. This means we have one of the threads we created, rather
110 ### than the main thread. Record the thread in the spin_threads
111 ### array. Also remember the level of the 'spin' routine in the backtrace, for
113 proc check_thread_stack {number spin_threads spin_threads_level} {
118 upvar $spin_threads tarr
119 upvar $spin_threads_level tarrl
121 select_thread $number
124 -re ".*(\[0-9\]+)\[ \t\]+$hex in spin \\(vp=(0x\[0-9a-f\]+).*\r\n$gdb_prompt $" {
125 if {[info exists tarr($number)]} {
126 fail "backtrace of thread number $number in spin"
128 pass "backtrace of thread number $number in spin"
129 set level $expect_out(1,string)
130 set tarrl($number) $level
134 -re ".*$gdb_prompt $" {
137 pass "backtrace of thread number $number not relevant"
140 fail "backtrace of thread number $number (timeout)"
147 gdb_reinitialize_dir $srcdir/$subdir
150 if ![runto_main] then {
151 fail "Can't run to main"
155 # Set a breakpoint at the "spin" routine to
156 # test the thread local's value.
158 gdb_test "b [gdb_get_line_number "here we know tls value"]" \
159 ".*Breakpoint 2.*tls.*" "set breakpoint at all threads"
161 # Set a bp at a point where we know all threads are alive.
163 gdb_test "b [gdb_get_line_number "still alive"]" \
164 ".*Breakpoint 3.*tls.*" "set breakpoint at synch point"
166 # Set a bp at the end to see if all threads are finished.
168 gdb_test "b [gdb_get_line_number "before exit"]" \
169 ".*Breakpoint 4.*tls.*" "set breakpoint at exit"
171 send_gdb "continue\n"
173 -re ".*Program received signal SIGSEGV.*a_thread_local = 0;.*$gdb_prompt $" {
174 # This is the first symptom if the gcc and binutils versions
175 # in use support TLS, but the system glibc does not.
176 unsupported "continue to first thread: system does not support TLS"
179 -re ".*$inferior_exited_re normally.*$gdb_prompt $" {
180 fail "continue to first thread: program runaway"
182 -re ".*Pass 0 done.*Pass 1 done.*$gdb_prompt $" {
183 fail "continue to first thread: program runaway 2"
185 -re ".*Breakpoint 2.*tls value.*$gdb_prompt $" {
186 pass "continue to first thread: get to thread"
188 -re ".*$gdb_prompt $" {
189 fail "continue to first thread: no progress?"
191 timeout { fail "continue to first thread (timeout)" }
194 gdb_test "info thread" ".*Thread.*spin.*" \
195 "at least one th in spin while stopped at first th"
197 check_thread_local "first"
199 gdb_test "continue" ".*Breakpoint 2.*tls value.*" "continue to second thread"
200 gdb_test "info thread" "Thread.*spin.*" \
201 "at least one th in spin while stopped at second th"
203 check_thread_local "second"
205 gdb_test "continue" ".*Breakpoint 2.*tls value.*" "continue to third thread"
206 gdb_test "info thread" ".*Thread.*spin.*" \
207 "at least one th in spin while stopped at third th"
209 check_thread_local "third"
211 gdb_test "continue" ".*Breakpoint 3.*still alive.*" "continue to synch point"
214 send_gdb "info thread\n"
216 -re "^info thread\[ \t\r\n\]+ *Id .*Frame\[ \t\r\n\]+(\[0-9\]+) *Thread.*$gdb_prompt $" {
217 set no_of_threads $expect_out(1,string)
218 pass "get number of threads"
220 -re "$gdb_prompt $" {
221 fail "get number of threads"
224 fail "get number of threads (timeout)"
228 array set spin_threads {}
230 array set spin_threads_level {}
231 unset spin_threads_level
233 # For each thread check its backtrace to see if it is stopped at the
235 for {set i 1} {$i <= $no_of_threads} {incr i} {
236 check_thread_stack $i spin_threads spin_threads_level
239 ### Loop through the threads and check the values of the tls variables.
240 ### keep track of how many threads we find in the spin routine.
242 foreach i [array names spin_threads] {
243 if {$spin_threads($i) == 1} {
246 set level $spin_threads_level($i)
247 # We expect to be in sem_wait, but if the thread has not yet
248 # been scheduled, we might be in sem_post still. We could be at
249 # any intermediate point in spin, too, but that is much less
251 gdb_test "up $level" ".*spin.*sem_(wait|post).*" "thread $i up"
252 check_thread_local $i
256 if {$thrs_in_spin == 0} {
257 fail "No thread backtrace reported spin (vsyscall kernel problem?)"
260 gdb_test "continue" ".*Breakpoint 4.*before exit.*" "threads exited"
262 send_gdb "info thread\n"
264 -re ".* 1 *Thread.*2 *Thread.*$gdb_prompt $" {
265 fail "Too many threads left at end"
267 -re ".*\\\* 1 *Thread.*main.*$gdb_prompt $" {
268 pass "Expect only base thread at end"
270 -re ".*No stack.*$gdb_prompt $" {
271 fail "runaway at end"
273 -re ".*$gdb_prompt $" {
276 timeout { fail "at end (timeout)" }
279 # Start over and do some "info address" stuff
283 gdb_test "info address a_global" \
284 ".*a_global.*static storage at address.*" "info address a_global"
286 gdb_test "info address me" ".*me.*is a (complex DWARF expression:|variable).*" \
290 # Test LOC_UNRESOLVED references resolving for `extern' TLS variables.
292 gdb_test "p a_thread_local" " = \[0-9\]+"
293 # Here it could crash with: Cannot access memory at address 0x0
294 gdb_test "p file2_thread_local" " = \[0-9\]+"
295 # Depending on the current lookup scope we get LOC_UNRESOLVED or LOC_COMPUTED
297 # Symbol "file2_thread_local" is a thread-local variable at offset 8 in the thread-local storage for `.../gdb.threads/tls'.
298 gdb_test "info address file2_thread_local" "Symbol \"file2_thread_local\" is a thread-local variable.*"
299 # Here it could also crash with: Cannot access memory at address 0x0
300 gdb_test "p a_thread_local" " = \[0-9\]+" "p a_thread_local second time"
301 gdb_test "info address a_thread_local" "Symbol \"a_thread_local\" is a thread-local variable.*"