aboutsummaryrefslogtreecommitdiff
path: root/gdb/testsuite/gdb.threads/tls.exp
blob: 2c475776f246ce061a50fae701cb2a94c40af8e6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
# tls.exp -- Expect script to test thread-local storage
# Copyright (C) 1992, 2003, 2007, 2008 Free Software Foundation, Inc.

# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

# Please email any bugs, comments, and/or additions to this file to:
# bug-gdb@prep.ai.mit.edu

set testfile tls
set srcfile ${testfile}.c
set binfile ${objdir}/${subdir}/${testfile}

if [istarget "*-*-linux"] then {
    set target_cflags "-D_MIT_POSIX_THREADS"
} else {
    set target_cflags ""
}

if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}"]] != "" } {
    return -1
}

### Compute the value of the a_thread_local variable.
proc compute_expected_value {value} {
    set expected_value 0
    set i 0
    while { $i <= $value} {
        incr expected_value $i
        incr i
    }
    return $expected_value
}

### Get the value of the variable 'me' for the current thread.
proc get_me_variable {tnum} {
    global expect_out
    global gdb_prompt
    global decimal

    set value_of_me -1
    send_gdb "print me\n"
    gdb_expect {
	-re ".*= ($decimal).*\r\n$gdb_prompt $" {
	    set value_of_me $expect_out(1,string)
	    pass "$tnum thread print me"
        }
	-re "$gdb_prompt $" {
	    fail "$tnum thread print me"
	}
	timeout {
	    fail "$tnum thread print me (timeout)" 
	}
    }
    return ${value_of_me}
}

### Check the values of the thread local variables in the thread.
### Also check that info address print the right things.
proc check_thread_local {number} {
    set me_variable [get_me_variable $number]
    set expected_value [compute_expected_value ${me_variable}]

    gdb_test "p a_thread_local" \
	    "= $expected_value" \
	    "${number} thread local storage"

    gdb_test "p another_thread_local" \
	    "= $me_variable" \
	    "${number} another thread local storage"

    gdb_test "info address a_thread_local" \
	    ".*a_thread_local.*a thread-local variable at offset.*" \
	    "${number} info address a_thread_local"

    gdb_test "info address another_thread_local" \
    	    ".*another_thread_local.*a thread-local variable at offset.*" \
	    "${number} info address another_thread_local"
}

### Select a particular thread.
proc select_thread {thread} {
    global gdb_prompt

    send_gdb "thread $thread\n"
    gdb_expect {
	-re "\\\[Switching to thread .*\\\].*\r\n$gdb_prompt $" {
	    pass "selected thread: $thread"
	}
	-re "$gdb_prompt $" {
	    fail "selected thread: $thread"
	}
	timeout {
	    fail "selected thread: $thread (timeout)"
	}
    }
}

### Do a backtrace for the current thread, and check that the 'spin' routine
### is in it. This means we have one of the threads we created, rather
### than the main thread. Record the thread in the spin_threads 
### array. Also remember the level of the 'spin' routine in the backtrace, for 
### later use.
proc check_thread_stack {number spin_threads spin_threads_level} {
    global gdb_prompt
    global expect_out
    global decimal
    global hex
    upvar $spin_threads tarr
    upvar $spin_threads_level tarrl

    select_thread $number
    send_gdb "where\n"
    gdb_expect {
	-re ".*(\[0-9\]+)\[ \t\]+$hex in spin \\(vp=(0x\[0-9a-f\]+).*\r\n$gdb_prompt $" {
	    if {[info exists tarr($number)]} {
		fail "backtrace of thread number $number in spin"
	    } else {
		pass "backtrace of thread number $number in spin"
                set level $expect_out(1,string)
		set tarrl($number) $level
		set tarr($number) 1
	    }
	}
	-re ".*$gdb_prompt $" {
	 set tarr($number) 0
	 set tarrl($number) 0
	 pass "backtrace of thread number $number not relevant"
	}
	timeout {
	    fail "backtrace of thread number $number (timeout)" 
	}
    }
}

gdb_exit
gdb_start
gdb_reinitialize_dir $srcdir/$subdir

gdb_load ${binfile}
if ![runto_main] then {
   fail "Can't run to main"
   return 0
}

# Set a breakpoint at the "spin" routine to
# test the thread local's value.  
#
gdb_test "b [gdb_get_line_number "here we know tls value"]" \
         ".*Breakpoint 2.*tls.*"   "set breakpoint at all threads"

# Set a bp at a point where we know all threads are alive.
#
gdb_test "b [gdb_get_line_number "still alive"]" \
         ".*Breakpoint 3.*tls.*" "set breakpoint at synch point"

# Set a bp at the end to see if all threads are finished.
#
gdb_test "b [gdb_get_line_number "before exit"]" \
         ".*Breakpoint 4.*tls.*" "set breakpoint at exit"

send_gdb "continue\n"
gdb_expect {
    -re ".*Program received signal SIGSEGV.*a_thread_local = 0;.*$gdb_prompt $" {
        # This is the first symptom if the gcc and binutils versions
        # in use support TLS, but the system glibc does not.
        unsupported "continue to first thread: system does not support TLS"
        return -1
    }
    -re ".*Program exited normally.*$gdb_prompt $" {
        fail "continue to first thread: program runaway"
    }
    -re ".*Pass 0 done.*Pass 1 done.*$gdb_prompt $" {
        fail "continue to first thread: program runaway 2"
    }
    -re ".*Breakpoint 2.*tls value.*$gdb_prompt $" {
        pass "continue to first thread: get to thread"
    }
    -re ".*$gdb_prompt $" {
        fail "continue to first thread: no progress?"
    }
    timeout { fail "continue to first thread (timeout)" }
}

gdb_test "info thread" ".*Thread.*spin.*" \
	"at least one th in spin while stopped at first th"

check_thread_local "first"

gdb_test "continue" ".*Breakpoint 2.*tls value.*" "continue to second thread"
gdb_test "info thread" "Thread.*spin.*" \
	"at least one th in spin while stopped at second th"

check_thread_local "second"

gdb_test "continue" ".*Breakpoint 2.*tls value.*" "continue to third thread"
gdb_test "info thread" ".*Thread.*spin.*" \
	"at least one th in spin while stopped at third th"

check_thread_local "third"

gdb_test "continue" ".*Breakpoint 3.*still alive.*" "continue to synch point"

set no_of_threads 0
send_gdb "info thread\n"
gdb_expect {
	-re "^info thread\[ \t\r\n\]+(\[0-9\]+) Thread.*$gdb_prompt $" {
	   set no_of_threads $expect_out(1,string)
	   pass "get number of threads"
        }
	-re "$gdb_prompt $" {
	    fail "get number of threads"
	}
	timeout {
	    fail "get number of threads (timeout)"
	}
}

array set spin_threads {}
unset spin_threads
array set spin_threads_level {}
unset spin_threads_level

# For each thread check its backtrace to see if it is stopped at the
# spin routine. 
for {set i 1} {$i <= $no_of_threads} {incr i} {
    check_thread_stack $i spin_threads spin_threads_level
}

### Loop through the threads and check the values of the tls variables.
### keep track of how many threads we find in the spin routine.
set thrs_in_spin 0
foreach i [array names spin_threads] {
    if {$spin_threads($i) == 1} {
      incr thrs_in_spin
      select_thread $i
      set level $spin_threads_level($i)
      # We expect to be in sem_wait, but if the thread has not yet
      # been scheduled, we might be in sem_post still.  We could be at
      # any intermediate point in spin, too, but that is much less
      # likely.
      gdb_test "up $level" ".*spin.*sem_(wait|post).*" "thread $i up"
      check_thread_local $i 
    }
}

if {$thrs_in_spin == 0} {
  fail "No thread backtrace reported spin (vsyscall kernel problem?)"
}

gdb_test "continue" ".*Breakpoint 4.*before exit.*" "threads exited"

send_gdb "info thread\n" 
gdb_expect {
    -re ".* 1 Thread.*2 Thread.*$gdb_prompt $" {
        fail "Too many threads left at end"
    }
    -re ".*\\\* 1 Thread.*main.*$gdb_prompt $" {
        pass "Expect only base thread at end"
    }
    -re ".*No stack.*$gdb_prompt $" {
        fail "runaway at end"
    }
    -re ".*$gdb_prompt $" {
        fail "mess at end"
    }
    timeout { fail "at end (timeout)" }
}

# Start over and do some "info address" stuff
#
runto spin

gdb_test "info address a_global" \
	".*a_global.*static storage at address.*" "info address a_global"

setup_kfail "gdb/1294" "*-*-*"
gdb_test "info address me" ".*me.*is a variable at offset.*" "info address me"

# Done!
#
gdb_exit

return 0