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8bc2021f | 1 | # tls.exp -- Expect script to test thread-local storage |
9b254dd1 | 2 | # Copyright (C) 1992, 2003, 2007, 2008 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 EZ |
16 | |
17 | # Please email any bugs, comments, and/or additions to this file to: | |
18 | # bug-gdb@prep.ai.mit.edu | |
19 | ||
20 | set testfile tls | |
21 | set srcfile ${testfile}.c | |
22 | set binfile ${objdir}/${subdir}/${testfile} | |
23 | ||
24 | if [istarget "*-*-linux"] then { | |
25 | set target_cflags "-D_MIT_POSIX_THREADS" | |
26 | } else { | |
27 | set target_cflags "" | |
28 | } | |
29 | ||
30 | if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}"]] != "" } { | |
31 | return -1 | |
32 | } | |
33 | ||
34 | ### Compute the value of the a_thread_local variable. | |
35 | proc compute_expected_value {value} { | |
36 | set expected_value 0 | |
37 | set i 0 | |
38 | while { $i <= $value} { | |
39 | incr expected_value $i | |
40 | incr i | |
41 | } | |
42 | return $expected_value | |
43 | } | |
44 | ||
45 | ### Get the value of the variable 'me' for the current thread. | |
46 | proc get_me_variable {tnum} { | |
47 | global expect_out | |
48 | global gdb_prompt | |
49 | global decimal | |
50 | ||
51 | set value_of_me -1 | |
52 | send_gdb "print me\n" | |
53 | gdb_expect { | |
54 | -re ".*= ($decimal).*\r\n$gdb_prompt $" { | |
55 | set value_of_me $expect_out(1,string) | |
56 | pass "$tnum thread print me" | |
57 | } | |
58 | -re "$gdb_prompt $" { | |
59 | fail "$tnum thread print me" | |
60 | } | |
61 | timeout { | |
62 | fail "$tnum thread print me (timeout)" | |
63 | } | |
64 | } | |
65 | return ${value_of_me} | |
66 | } | |
67 | ||
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}] | |
73 | ||
74 | gdb_test "p a_thread_local" \ | |
75 | "= $expected_value" \ | |
76 | "${number} thread local storage" | |
77 | ||
78 | gdb_test "p another_thread_local" \ | |
79 | "= $me_variable" \ | |
80 | "${number} another thread local storage" | |
81 | ||
82 | gdb_test "info address a_thread_local" \ | |
83 | ".*a_thread_local.*a thread-local variable at offset.*" \ | |
84 | "${number} info address a_thread_local" | |
85 | ||
86 | gdb_test "info address another_thread_local" \ | |
87 | ".*another_thread_local.*a thread-local variable at offset.*" \ | |
88 | "${number} info address another_thread_local" | |
89 | } | |
90 | ||
91 | ### Select a particular thread. | |
92 | proc select_thread {thread} { | |
93 | global gdb_prompt | |
94 | ||
95 | send_gdb "thread $thread\n" | |
96 | gdb_expect { | |
97 | -re "\\\[Switching to thread .*\\\].*\r\n$gdb_prompt $" { | |
98 | pass "selected thread: $thread" | |
99 | } | |
100 | -re "$gdb_prompt $" { | |
101 | fail "selected thread: $thread" | |
102 | } | |
103 | timeout { | |
104 | fail "selected thread: $thread (timeout)" | |
105 | } | |
106 | } | |
107 | } | |
108 | ||
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 | |
113 | ### later use. | |
114 | proc check_thread_stack {number spin_threads spin_threads_level} { | |
115 | global gdb_prompt | |
116 | global expect_out | |
117 | global decimal | |
118 | global hex | |
119 | upvar $spin_threads tarr | |
120 | upvar $spin_threads_level tarrl | |
121 | ||
122 | select_thread $number | |
123 | send_gdb "where\n" | |
124 | gdb_expect { | |
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" | |
128 | } else { | |
129 | pass "backtrace of thread number $number in spin" | |
130 | set level $expect_out(1,string) | |
131 | set tarrl($number) $level | |
132 | set tarr($number) 1 | |
133 | } | |
134 | } | |
135 | -re ".*$gdb_prompt $" { | |
136 | set tarr($number) 0 | |
137 | set tarrl($number) 0 | |
138 | pass "backtrace of thread number $number not relevant" | |
139 | } | |
140 | timeout { | |
141 | fail "backtrace of thread number $number (timeout)" | |
142 | } | |
143 | } | |
144 | } | |
145 | ||
146 | gdb_exit | |
147 | gdb_start | |
148 | gdb_reinitialize_dir $srcdir/$subdir | |
149 | ||
150 | gdb_load ${binfile} | |
151 | if ![runto_main] then { | |
152 | fail "Can't run to main" | |
153 | return 0 | |
154 | } | |
155 | ||
156 | # Set a breakpoint at the "spin" routine to | |
157 | # test the thread local's value. | |
158 | # | |
159 | gdb_test "b [gdb_get_line_number "here we know tls value"]" \ | |
160 | ".*Breakpoint 2.*tls.*" "set breakpoint at all threads" | |
161 | ||
162 | # Set a bp at a point where we know all threads are alive. | |
163 | # | |
164 | gdb_test "b [gdb_get_line_number "still alive"]" \ | |
165 | ".*Breakpoint 3.*tls.*" "set breakpoint at synch point" | |
166 | ||
167 | # Set a bp at the end to see if all threads are finished. | |
168 | # | |
169 | gdb_test "b [gdb_get_line_number "before exit"]" \ | |
170 | ".*Breakpoint 4.*tls.*" "set breakpoint at exit" | |
171 | ||
172 | send_gdb "continue\n" | |
173 | gdb_expect { | |
4ee6625b DJ |
174 | -re ".*Program received signal SIGSEGV.*a_thread_local = 0;.*$gdb_prompt $" { |
175 | # This is the first symptom if the gcc and binutils versions | |
176 | # in use support TLS, but the system glibc does not. | |
177 | unsupported "continue to first thread: system does not support TLS" | |
178 | return -1 | |
179 | } | |
8bc2021f EZ |
180 | -re ".*Program exited normally.*$gdb_prompt $" { |
181 | fail "continue to first thread: program runaway" | |
182 | } | |
183 | -re ".*Pass 0 done.*Pass 1 done.*$gdb_prompt $" { | |
184 | fail "continue to first thread: program runaway 2" | |
185 | } | |
186 | -re ".*Breakpoint 2.*tls value.*$gdb_prompt $" { | |
187 | pass "continue to first thread: get to thread" | |
188 | } | |
189 | -re ".*$gdb_prompt $" { | |
190 | fail "continue to first thread: no progress?" | |
191 | } | |
192 | timeout { fail "continue to first thread (timeout)" } | |
193 | } | |
194 | ||
195 | gdb_test "info thread" ".*Thread.*spin.*" \ | |
196 | "at least one th in spin while stopped at first th" | |
197 | ||
198 | check_thread_local "first" | |
199 | ||
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" | |
203 | ||
204 | check_thread_local "second" | |
205 | ||
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" | |
209 | ||
210 | check_thread_local "third" | |
211 | ||
212 | gdb_test "continue" ".*Breakpoint 3.*still alive.*" "continue to synch point" | |
213 | ||
51514e06 | 214 | set no_of_threads 0 |
8bc2021f EZ |
215 | send_gdb "info thread\n" |
216 | gdb_expect { | |
217 | -re "^info thread\[ \t\r\n\]+(\[0-9\]+) Thread.*$gdb_prompt $" { | |
218 | set no_of_threads $expect_out(1,string) | |
219 | pass "get number of threads" | |
220 | } | |
221 | -re "$gdb_prompt $" { | |
222 | fail "get number of threads" | |
223 | } | |
224 | timeout { | |
225 | fail "get number of threads (timeout)" | |
226 | } | |
227 | } | |
228 | ||
229 | array set spin_threads {} | |
230 | unset spin_threads | |
231 | array set spin_threads_level {} | |
232 | unset spin_threads_level | |
233 | ||
234 | # For each thread check its backtrace to see if it is stopped at the | |
235 | # spin routine. | |
236 | for {set i 1} {$i <= $no_of_threads} {incr i} { | |
237 | check_thread_stack $i spin_threads spin_threads_level | |
238 | } | |
239 | ||
240 | ### Loop through the threads and check the values of the tls variables. | |
241 | ### keep track of how many threads we find in the spin routine. | |
242 | set thrs_in_spin 0 | |
243 | foreach i [array names spin_threads] { | |
244 | if {$spin_threads($i) == 1} { | |
245 | incr thrs_in_spin | |
246 | select_thread $i | |
247 | set level $spin_threads_level($i) | |
61a771aa DJ |
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 | |
251 | # likely. | |
252 | gdb_test "up $level" ".*spin.*sem_(wait|post).*" "thread $i up" | |
8bc2021f EZ |
253 | check_thread_local $i |
254 | } | |
255 | } | |
256 | ||
257 | if {$thrs_in_spin == 0} { | |
258 | fail "No thread backtrace reported spin (vsyscall kernel problem?)" | |
259 | } | |
260 | ||
261 | gdb_test "continue" ".*Breakpoint 4.*before exit.*" "threads exited" | |
262 | ||
263 | send_gdb "info thread\n" | |
264 | gdb_expect { | |
265 | -re ".* 1 Thread.*2 Thread.*$gdb_prompt $" { | |
266 | fail "Too many threads left at end" | |
267 | } | |
268 | -re ".*\\\* 1 Thread.*main.*$gdb_prompt $" { | |
269 | pass "Expect only base thread at end" | |
270 | } | |
271 | -re ".*No stack.*$gdb_prompt $" { | |
272 | fail "runaway at end" | |
273 | } | |
274 | -re ".*$gdb_prompt $" { | |
275 | fail "mess at end" | |
276 | } | |
277 | timeout { fail "at end (timeout)" } | |
278 | } | |
279 | ||
280 | # Start over and do some "info address" stuff | |
281 | # | |
282 | runto spin | |
283 | ||
284 | gdb_test "info address a_global" \ | |
285 | ".*a_global.*static storage at address.*" "info address a_global" | |
286 | ||
e00759ef | 287 | setup_kfail "gdb/1294" "*-*-*" |
8bc2021f EZ |
288 | gdb_test "info address me" ".*me.*is a variable at offset.*" "info address me" |
289 | ||
290 | # Done! | |
291 | # | |
292 | gdb_exit | |
293 | ||
294 | return 0 |