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/>. */
17 # Please email any bugs, comments, and/or additions to this file to:
18 # bug-gdb@prep.ai.mit.edu
21 set srcfile ${testfile}.c
22 set binfile ${objdir}/${subdir}/${testfile}
24 if [istarget "*-*-linux"] then {
25 set target_cflags "-D_MIT_POSIX_THREADS"
30 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}"]] != "" } {
34 ### Compute the value of the a_thread_local variable.
35 proc compute_expected_value {value} {
38 while { $i <= $value} {
39 incr expected_value $i
42 return $expected_value
45 ### Get the value of the variable 'me' for the current thread.
46 proc get_me_variable {tnum} {
54 -re ".*= ($decimal).*\r\n$gdb_prompt $" {
55 set value_of_me $expect_out(1,string)
56 pass "$tnum thread print me"
59 fail "$tnum thread print me"
62 fail "$tnum thread print me (timeout)"
68 ### Check the values of the thread local variables in the thread.
69 ### Also check that info address print the right things.
70 proc check_thread_local {number} {
71 set me_variable [get_me_variable $number]
72 set expected_value [compute_expected_value ${me_variable}]
74 gdb_test "p a_thread_local" \
76 "${number} thread local storage"
78 gdb_test "p another_thread_local" \
80 "${number} another thread local storage"
82 gdb_test "info address a_thread_local" \
83 ".*a_thread_local.*a thread-local variable at offset.*" \
84 "${number} info address a_thread_local"
86 gdb_test "info address another_thread_local" \
87 ".*another_thread_local.*a thread-local variable at offset.*" \
88 "${number} info address another_thread_local"
91 ### Select a particular thread.
92 proc select_thread {thread} {
95 send_gdb "thread $thread\n"
97 -re "\\\[Switching to thread .*\\\].*\r\n$gdb_prompt $" {
98 pass "selected thread: $thread"
100 -re "$gdb_prompt $" {
101 fail "selected thread: $thread"
104 fail "selected thread: $thread (timeout)"
109 ### Do a backtrace for the current thread, and check that the 'spin' routine
110 ### is in it. This means we have one of the threads we created, rather
111 ### than the main thread. Record the thread in the spin_threads
112 ### array. Also remember the level of the 'spin' routine in the backtrace, for
114 proc check_thread_stack {number spin_threads spin_threads_level} {
119 upvar $spin_threads tarr
120 upvar $spin_threads_level tarrl
122 select_thread $number
125 -re ".*(\[0-9\]+)\[ \t\]+$hex in spin \\(vp=(0x\[0-9a-f\]+).*\r\n$gdb_prompt $" {
126 if {[info exists tarr($number)]} {
127 fail "backtrace of thread number $number in spin"
129 pass "backtrace of thread number $number in spin"
130 set level $expect_out(1,string)
131 set tarrl($number) $level
135 -re ".*$gdb_prompt $" {
138 pass "backtrace of thread number $number not relevant"
141 fail "backtrace of thread number $number (timeout)"
148 gdb_reinitialize_dir $srcdir/$subdir
151 if ![runto_main] then {
152 fail "Can't run to main"
156 # Set a breakpoint at the "spin" routine to
157 # test the thread local's value.
159 gdb_test "b [gdb_get_line_number "here we know tls value"]" \
160 ".*Breakpoint 2.*tls.*" "set breakpoint at all threads"
162 # Set a bp at a point where we know all threads are alive.
164 gdb_test "b [gdb_get_line_number "still alive"]" \
165 ".*Breakpoint 3.*tls.*" "set breakpoint at synch point"
167 # Set a bp at the end to see if all threads are finished.
169 gdb_test "b [gdb_get_line_number "before exit"]" \
170 ".*Breakpoint 4.*tls.*" "set breakpoint at exit"
172 send_gdb "continue\n"
174 -re ".*Program received signal SIGSEGV.*a_thread_local = 0;.*$gdb_prompt $" {
175 # This is the first symptom if the gcc and binutils versions
176 # in use support TLS, but the system glibc does not.
177 unsupported "continue to first thread: system does not support TLS"
180 -re ".*Program exited normally.*$gdb_prompt $" {
181 fail "continue to first thread: program runaway"
183 -re ".*Pass 0 done.*Pass 1 done.*$gdb_prompt $" {
184 fail "continue to first thread: program runaway 2"
186 -re ".*Breakpoint 2.*tls value.*$gdb_prompt $" {
187 pass "continue to first thread: get to thread"
189 -re ".*$gdb_prompt $" {
190 fail "continue to first thread: no progress?"
192 timeout { fail "continue to first thread (timeout)" }
195 gdb_test "info thread" ".*Thread.*spin.*" \
196 "at least one th in spin while stopped at first th"
198 check_thread_local "first"
200 gdb_test "continue" ".*Breakpoint 2.*tls value.*" "continue to second thread"
201 gdb_test "info thread" "Thread.*spin.*" \
202 "at least one th in spin while stopped at second th"
204 check_thread_local "second"
206 gdb_test "continue" ".*Breakpoint 2.*tls value.*" "continue to third thread"
207 gdb_test "info thread" ".*Thread.*spin.*" \
208 "at least one th in spin while stopped at third th"
210 check_thread_local "third"
212 gdb_test "continue" ".*Breakpoint 3.*still alive.*" "continue to synch point"
215 send_gdb "info thread\n"
217 -re "^info thread\[ \t\r\n\]+(\[0-9\]+) Thread.*$gdb_prompt $" {
218 set no_of_threads $expect_out(1,string)
219 pass "get number of threads"
221 -re "$gdb_prompt $" {
222 fail "get number of threads"
225 fail "get number of threads (timeout)"
229 array set spin_threads {}
231 array set spin_threads_level {}
232 unset spin_threads_level
234 # For each thread check its backtrace to see if it is stopped at the
236 for {set i 1} {$i <= $no_of_threads} {incr i} {
237 check_thread_stack $i spin_threads spin_threads_level
240 ### Loop through the threads and check the values of the tls variables.
241 ### keep track of how many threads we find in the spin routine.
243 foreach i [array names spin_threads] {
244 if {$spin_threads($i) == 1} {
247 set level $spin_threads_level($i)
248 # We expect to be in sem_wait, but if the thread has not yet
249 # been scheduled, we might be in sem_post still. We could be at
250 # any intermediate point in spin, too, but that is much less
252 gdb_test "up $level" ".*spin.*sem_(wait|post).*" "thread $i up"
253 check_thread_local $i
257 if {$thrs_in_spin == 0} {
258 fail "No thread backtrace reported spin (vsyscall kernel problem?)"
261 gdb_test "continue" ".*Breakpoint 4.*before exit.*" "threads exited"
263 send_gdb "info thread\n"
265 -re ".* 1 Thread.*2 Thread.*$gdb_prompt $" {
266 fail "Too many threads left at end"
268 -re ".*\\\* 1 Thread.*main.*$gdb_prompt $" {
269 pass "Expect only base thread at end"
271 -re ".*No stack.*$gdb_prompt $" {
272 fail "runaway at end"
274 -re ".*$gdb_prompt $" {
277 timeout { fail "at end (timeout)" }
280 # Start over and do some "info address" stuff
284 gdb_test "info address a_global" \
285 ".*a_global.*static storage at address.*" "info address a_global"
287 setup_kfail "gdb/1294" "*-*-*"
288 gdb_test "info address me" ".*me.*is a variable at offset.*" "info address me"