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8bc2021f | 1 | # tls.exp -- Expect script to test thread-local storage |
32d0add0 | 2 | # Copyright (C) 1992-2015 Free Software Foundation, Inc. |
8bc2021f EZ |
3 | |
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 | |
e22f8b7c | 6 | # the Free Software Foundation; either version 3 of the License, or |
8bc2021f | 7 | # (at your option) any later version. |
e22f8b7c | 8 | # |
8bc2021f EZ |
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. | |
e22f8b7c | 13 | # |
8bc2021f | 14 | # You should have received a copy of the GNU General Public License |
e22f8b7c | 15 | # along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
8bc2021f | 16 | |
0efbbabc | 17 | standard_testfile tls.c tls2.c |
8bc2021f EZ |
18 | |
19 | if [istarget "*-*-linux"] then { | |
20 | set target_cflags "-D_MIT_POSIX_THREADS" | |
21 | } else { | |
22 | set target_cflags "" | |
23 | } | |
24 | ||
0efbbabc | 25 | if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile} ${srcdir}/${subdir}/${srcfile2}" "${binfile}" executable [list c++ debug]] != "" } { |
8bc2021f EZ |
26 | return -1 |
27 | } | |
28 | ||
29 | ### Compute the value of the a_thread_local variable. | |
30 | proc compute_expected_value {value} { | |
31 | set expected_value 0 | |
32 | set i 0 | |
33 | while { $i <= $value} { | |
34 | incr expected_value $i | |
35 | incr i | |
36 | } | |
37 | return $expected_value | |
38 | } | |
39 | ||
40 | ### Get the value of the variable 'me' for the current thread. | |
41 | proc get_me_variable {tnum} { | |
42 | global expect_out | |
43 | global gdb_prompt | |
44 | global decimal | |
45 | ||
46 | set value_of_me -1 | |
47 | send_gdb "print me\n" | |
48 | gdb_expect { | |
49 | -re ".*= ($decimal).*\r\n$gdb_prompt $" { | |
50 | set value_of_me $expect_out(1,string) | |
51 | pass "$tnum thread print me" | |
52 | } | |
53 | -re "$gdb_prompt $" { | |
54 | fail "$tnum thread print me" | |
55 | } | |
56 | timeout { | |
57 | fail "$tnum thread print me (timeout)" | |
58 | } | |
59 | } | |
60 | return ${value_of_me} | |
61 | } | |
62 | ||
63 | ### Check the values of the thread local variables in the thread. | |
64 | ### Also check that info address print the right things. | |
65 | proc check_thread_local {number} { | |
66 | set me_variable [get_me_variable $number] | |
67 | set expected_value [compute_expected_value ${me_variable}] | |
68 | ||
69 | gdb_test "p a_thread_local" \ | |
70 | "= $expected_value" \ | |
71 | "${number} thread local storage" | |
72 | ||
515ed532 | 73 | gdb_test "p K::another_thread_local" \ |
8bc2021f EZ |
74 | "= $me_variable" \ |
75 | "${number} another thread local storage" | |
76 | ||
77 | gdb_test "info address a_thread_local" \ | |
78 | ".*a_thread_local.*a thread-local variable at offset.*" \ | |
79 | "${number} info address a_thread_local" | |
80 | ||
515ed532 | 81 | gdb_test "info address K::another_thread_local" \ |
8bc2021f EZ |
82 | ".*another_thread_local.*a thread-local variable at offset.*" \ |
83 | "${number} info address another_thread_local" | |
84 | } | |
85 | ||
86 | ### Select a particular thread. | |
87 | proc select_thread {thread} { | |
88 | global gdb_prompt | |
89 | ||
90 | send_gdb "thread $thread\n" | |
91 | gdb_expect { | |
92 | -re "\\\[Switching to thread .*\\\].*\r\n$gdb_prompt $" { | |
93 | pass "selected thread: $thread" | |
94 | } | |
95 | -re "$gdb_prompt $" { | |
96 | fail "selected thread: $thread" | |
97 | } | |
98 | timeout { | |
99 | fail "selected thread: $thread (timeout)" | |
100 | } | |
101 | } | |
102 | } | |
103 | ||
104 | ### Do a backtrace for the current thread, and check that the 'spin' routine | |
105 | ### is in it. This means we have one of the threads we created, rather | |
106 | ### than the main thread. Record the thread in the spin_threads | |
107 | ### array. Also remember the level of the 'spin' routine in the backtrace, for | |
108 | ### later use. | |
109 | proc check_thread_stack {number spin_threads spin_threads_level} { | |
110 | global gdb_prompt | |
111 | global expect_out | |
112 | global decimal | |
113 | global hex | |
114 | upvar $spin_threads tarr | |
115 | upvar $spin_threads_level tarrl | |
116 | ||
117 | select_thread $number | |
118 | send_gdb "where\n" | |
119 | gdb_expect { | |
120 | -re ".*(\[0-9\]+)\[ \t\]+$hex in spin \\(vp=(0x\[0-9a-f\]+).*\r\n$gdb_prompt $" { | |
121 | if {[info exists tarr($number)]} { | |
122 | fail "backtrace of thread number $number in spin" | |
123 | } else { | |
124 | pass "backtrace of thread number $number in spin" | |
125 | set level $expect_out(1,string) | |
126 | set tarrl($number) $level | |
127 | set tarr($number) 1 | |
128 | } | |
129 | } | |
130 | -re ".*$gdb_prompt $" { | |
131 | set tarr($number) 0 | |
132 | set tarrl($number) 0 | |
133 | pass "backtrace of thread number $number not relevant" | |
134 | } | |
135 | timeout { | |
136 | fail "backtrace of thread number $number (timeout)" | |
137 | } | |
138 | } | |
139 | } | |
140 | ||
0efbbabc | 141 | clean_restart ${binfile} |
8bc2021f EZ |
142 | if ![runto_main] then { |
143 | fail "Can't run to main" | |
144 | return 0 | |
145 | } | |
146 | ||
147 | # Set a breakpoint at the "spin" routine to | |
148 | # test the thread local's value. | |
149 | # | |
150 | gdb_test "b [gdb_get_line_number "here we know tls value"]" \ | |
151 | ".*Breakpoint 2.*tls.*" "set breakpoint at all threads" | |
152 | ||
153 | # Set a bp at a point where we know all threads are alive. | |
154 | # | |
155 | gdb_test "b [gdb_get_line_number "still alive"]" \ | |
156 | ".*Breakpoint 3.*tls.*" "set breakpoint at synch point" | |
157 | ||
158 | # Set a bp at the end to see if all threads are finished. | |
159 | # | |
160 | gdb_test "b [gdb_get_line_number "before exit"]" \ | |
161 | ".*Breakpoint 4.*tls.*" "set breakpoint at exit" | |
162 | ||
163 | send_gdb "continue\n" | |
164 | gdb_expect { | |
4ee6625b DJ |
165 | -re ".*Program received signal SIGSEGV.*a_thread_local = 0;.*$gdb_prompt $" { |
166 | # This is the first symptom if the gcc and binutils versions | |
167 | # in use support TLS, but the system glibc does not. | |
168 | unsupported "continue to first thread: system does not support TLS" | |
169 | return -1 | |
170 | } | |
fda326dd | 171 | -re ".*$inferior_exited_re normally.*$gdb_prompt $" { |
8bc2021f EZ |
172 | fail "continue to first thread: program runaway" |
173 | } | |
174 | -re ".*Pass 0 done.*Pass 1 done.*$gdb_prompt $" { | |
175 | fail "continue to first thread: program runaway 2" | |
176 | } | |
177 | -re ".*Breakpoint 2.*tls value.*$gdb_prompt $" { | |
178 | pass "continue to first thread: get to thread" | |
179 | } | |
180 | -re ".*$gdb_prompt $" { | |
181 | fail "continue to first thread: no progress?" | |
182 | } | |
183 | timeout { fail "continue to first thread (timeout)" } | |
184 | } | |
185 | ||
186 | gdb_test "info thread" ".*Thread.*spin.*" \ | |
187 | "at least one th in spin while stopped at first th" | |
188 | ||
189 | check_thread_local "first" | |
190 | ||
191 | gdb_test "continue" ".*Breakpoint 2.*tls value.*" "continue to second thread" | |
192 | gdb_test "info thread" "Thread.*spin.*" \ | |
193 | "at least one th in spin while stopped at second th" | |
194 | ||
195 | check_thread_local "second" | |
196 | ||
197 | gdb_test "continue" ".*Breakpoint 2.*tls value.*" "continue to third thread" | |
198 | gdb_test "info thread" ".*Thread.*spin.*" \ | |
199 | "at least one th in spin while stopped at third th" | |
200 | ||
201 | check_thread_local "third" | |
202 | ||
203 | gdb_test "continue" ".*Breakpoint 3.*still alive.*" "continue to synch point" | |
204 | ||
51514e06 | 205 | set no_of_threads 0 |
8bc2021f EZ |
206 | send_gdb "info thread\n" |
207 | gdb_expect { | |
5d3d9cba | 208 | -re "^info thread\[ \t\r\n\]+ *Id .*Frame\[ \t\r\n\]+(\[0-9\]+) *Thread.*$gdb_prompt $" { |
8bc2021f EZ |
209 | set no_of_threads $expect_out(1,string) |
210 | pass "get number of threads" | |
211 | } | |
212 | -re "$gdb_prompt $" { | |
213 | fail "get number of threads" | |
214 | } | |
215 | timeout { | |
216 | fail "get number of threads (timeout)" | |
217 | } | |
218 | } | |
219 | ||
220 | array set spin_threads {} | |
221 | unset spin_threads | |
222 | array set spin_threads_level {} | |
223 | unset spin_threads_level | |
224 | ||
225 | # For each thread check its backtrace to see if it is stopped at the | |
226 | # spin routine. | |
227 | for {set i 1} {$i <= $no_of_threads} {incr i} { | |
228 | check_thread_stack $i spin_threads spin_threads_level | |
229 | } | |
230 | ||
231 | ### Loop through the threads and check the values of the tls variables. | |
232 | ### keep track of how many threads we find in the spin routine. | |
233 | set thrs_in_spin 0 | |
234 | foreach i [array names spin_threads] { | |
235 | if {$spin_threads($i) == 1} { | |
236 | incr thrs_in_spin | |
237 | select_thread $i | |
238 | set level $spin_threads_level($i) | |
61a771aa DJ |
239 | # We expect to be in sem_wait, but if the thread has not yet |
240 | # been scheduled, we might be in sem_post still. We could be at | |
241 | # any intermediate point in spin, too, but that is much less | |
242 | # likely. | |
243 | gdb_test "up $level" ".*spin.*sem_(wait|post).*" "thread $i up" | |
8bc2021f EZ |
244 | check_thread_local $i |
245 | } | |
246 | } | |
247 | ||
248 | if {$thrs_in_spin == 0} { | |
249 | fail "No thread backtrace reported spin (vsyscall kernel problem?)" | |
250 | } | |
251 | ||
252 | gdb_test "continue" ".*Breakpoint 4.*before exit.*" "threads exited" | |
253 | ||
254 | send_gdb "info thread\n" | |
255 | gdb_expect { | |
a7658b96 | 256 | -re ".* 1 *Thread.*2 *Thread.*$gdb_prompt $" { |
8bc2021f EZ |
257 | fail "Too many threads left at end" |
258 | } | |
a7658b96 | 259 | -re ".*\\\* 1 *Thread.*main.*$gdb_prompt $" { |
8bc2021f EZ |
260 | pass "Expect only base thread at end" |
261 | } | |
262 | -re ".*No stack.*$gdb_prompt $" { | |
263 | fail "runaway at end" | |
264 | } | |
265 | -re ".*$gdb_prompt $" { | |
266 | fail "mess at end" | |
267 | } | |
268 | timeout { fail "at end (timeout)" } | |
269 | } | |
270 | ||
271 | # Start over and do some "info address" stuff | |
272 | # | |
273 | runto spin | |
274 | ||
275 | gdb_test "info address a_global" \ | |
276 | ".*a_global.*static storage at address.*" "info address a_global" | |
277 | ||
fc529d80 | 278 | gdb_test "info address me" ".*me.*is a (complex DWARF expression:|variable).*" \ |
7155d578 | 279 | "info address me" |
8bc2021f | 280 | |
e0740f77 JK |
281 | |
282 | # Test LOC_UNRESOLVED references resolving for `extern' TLS variables. | |
283 | ||
284 | gdb_test "p a_thread_local" " = \[0-9\]+" | |
285 | # Here it could crash with: Cannot access memory at address 0x0 | |
286 | gdb_test "p file2_thread_local" " = \[0-9\]+" | |
287 | # Depending on the current lookup scope we get LOC_UNRESOLVED or LOC_COMPUTED | |
288 | # both printing: | |
289 | # Symbol "file2_thread_local" is a thread-local variable at offset 8 in the thread-local storage for `.../gdb.threads/tls'. | |
290 | gdb_test "info address file2_thread_local" "Symbol \"file2_thread_local\" is a thread-local variable.*" | |
291 | # Here it could also crash with: Cannot access memory at address 0x0 | |
292 | gdb_test "p a_thread_local" " = \[0-9\]+" "p a_thread_local second time" | |
293 | gdb_test "info address a_thread_local" "Symbol \"a_thread_local\" is a thread-local variable.*" | |
294 | ||
8bc2021f EZ |
295 | # Done! |
296 | # | |
297 | gdb_exit | |
298 | ||
299 | return 0 |