gnu/dist/gdb6/gdb/testsuite/gdb.threads/tls.exp

   1 # tls.exp -- Expect script to test thread-local storage
   2 # Copyright (C) 1992, 2003 Free Software Foundation, Inc.
   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
   6 # the Free Software Foundation; either version 2 of the License, or
   7 # (at your option) any later version.
   8 #
   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.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 # Please email any bugs, comments, and/or additions to this file to:
  19 # bug-gdb@prep.ai.mit.edu
  20
  21 set testfile tls
  22 set srcfile ${testfile}.c
  23 set binfile ${objdir}/${subdir}/${testfile}
  24
  25 if [istarget "*-*-linux"] then {
  26     set target_cflags "-D_MIT_POSIX_THREADS"
  27 } else {
  28     set target_cflags ""
  29 }
  30
  31 if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable [list debug "incdir=${objdir}"]] != "" } {
  32     return -1
  33 }
  34
  35 ### Compute the value of the a_thread_local variable.
  36 proc compute_expected_value {value} {
  37     set expected_value 0
  38     set i 0
  39     while { $i <= $value} {
  40         incr expected_value $i
  41         incr i
  42     }
  43     return $expected_value
  44 }
  45
  46 ### Get the value of the variable 'me' for the current thread.
  47 proc get_me_variable {tnum} {
  48     global expect_out
  49     global gdb_prompt
  50     global decimal
  51
  52     set value_of_me -1
  53     send_gdb "print me\n"
  54     gdb_expect {
  55         -re ".*= ($decimal).*\r\n$gdb_prompt $" {
  56             set value_of_me $expect_out(1,string)
  57             pass "$tnum thread print me"
  58         }
  59         -re "$gdb_prompt $" {
  60             fail "$tnum thread print me"
  61         }
  62         timeout {
  63             fail "$tnum thread print me (timeout)"
  64         }
  65     }
  66     return ${value_of_me}
  67 }
  68
  69 ### Check the values of the thread local variables in the thread.
  70 ### Also check that info address print the right things.
  71 proc check_thread_local {number} {
  72     set me_variable [get_me_variable $number]
  73     set expected_value [compute_expected_value ${me_variable}]
  74
  75     gdb_test "p a_thread_local" \
  76             "= $expected_value" \
  77             "${number} thread local storage"
  78
  79     gdb_test "p another_thread_local" \
  80             "= $me_variable" \
  81             "${number} another thread local storage"
  82
  83     gdb_test "info address a_thread_local" \
  84             ".*a_thread_local.*a thread-local variable at offset.*" \
  85             "${number} info address a_thread_local"
  86
  87     gdb_test "info address another_thread_local" \
  88             ".*another_thread_local.*a thread-local variable at offset.*" \
  89             "${number} info address another_thread_local"
  90 }
  91
  92 ### Select a particular thread.
  93 proc select_thread {thread} {
  94     global gdb_prompt
  95
  96     send_gdb "thread $thread\n"
  97     gdb_expect {
  98         -re "\\\[Switching to thread .*\\\].*\r\n$gdb_prompt $" {
  99             pass "selected thread: $thread"
 100         }
 101         -re "$gdb_prompt $" {
 102             fail "selected thread: $thread"
 103         }
 104         timeout {
 105             fail "selected thread: $thread (timeout)"
 106         }
 107     }
 108 }
 109
 110 ### Do a backtrace for the current thread, and check that the 'spin' routine
 111 ### is in it. This means we have one of the threads we created, rather
 112 ### than the main thread. Record the thread in the spin_threads
 113 ### array. Also remember the level of the 'spin' routine in the backtrace, for
 114 ### later use.
 115 proc check_thread_stack {number spin_threads spin_threads_level} {
 116     global gdb_prompt
 117     global expect_out
 118     global decimal
 119     global hex
 120     upvar $spin_threads tarr
 121     upvar $spin_threads_level tarrl
 122
 123     select_thread $number
 124     send_gdb "where\n"
 125     gdb_expect {
 126         -re ".*(\[0-9\]+)\[ \t\]+$hex in spin \\(vp=(0x\[0-9a-f\]+).*\r\n$gdb_prompt $" {
 127             if {[info exists tarr($number)]} {
 128                 fail "backtrace of thread number $number in spin"
 129             } else {
 130                 pass "backtrace of thread number $number in spin"
 131                 set level $expect_out(1,string)
 132                 set tarrl($number) $level
 133                 set tarr($number) 1
 134             }
 135         }
 136         -re ".*$gdb_prompt $" {
 137          set tarr($number) 0
 138          set tarrl($number) 0
 139          pass "backtrace of thread number $number not relevant"
 140         }
 141         timeout {
 142             fail "backtrace of thread number $number (timeout)"
 143         }
 144     }
 145 }
 146
 147 gdb_exit
 148 gdb_start
 149 gdb_reinitialize_dir $srcdir/$subdir
 150
 151 gdb_load ${binfile}
 152 if ![runto_main] then {
 153    fail "Can't run to main"
 154    return 0
 155 }
 156
 157 # Set a breakpoint at the "spin" routine to
 158 # test the thread local's value.
 159 #
 160 gdb_test "b [gdb_get_line_number "here we know tls value"]" \
 161          ".*Breakpoint 2.*tls.*"   "set breakpoint at all threads"
 162
 163 # Set a bp at a point where we know all threads are alive.
 164 #
 165 gdb_test "b [gdb_get_line_number "still alive"]" \
 166          ".*Breakpoint 3.*tls.*" "set breakpoint at synch point"
 167
 168 # Set a bp at the end to see if all threads are finished.
 169 #
 170 gdb_test "b [gdb_get_line_number "before exit"]" \
 171          ".*Breakpoint 4.*tls.*" "set breakpoint at exit"
 172
 173 send_gdb "continue\n"
 174 gdb_expect {
 175     -re ".*Program received signal SIGSEGV.*a_thread_local = 0;.*$gdb_prompt $" {
 176         # This is the first symptom if the gcc and binutils versions
 177         # in use support TLS, but the system glibc does not.
 178         unsupported "continue to first thread: system does not support TLS"
 179         return -1
 180     }
 181     -re ".*Program exited normally.*$gdb_prompt $" {
 182         fail "continue to first thread: program runaway"
 183     }
 184     -re ".*Pass 0 done.*Pass 1 done.*$gdb_prompt $" {
 185         fail "continue to first thread: program runaway 2"
 186     }
 187     -re ".*Breakpoint 2.*tls value.*$gdb_prompt $" {
 188         pass "continue to first thread: get to thread"
 189     }
 190     -re ".*$gdb_prompt $" {
 191         fail "continue to first thread: no progress?"
 192     }
 193     timeout { fail "continue to first thread (timeout)" }
 194 }
 195
 196 gdb_test "info thread" ".*Thread.*spin.*" \
 197         "at least one th in spin while stopped at first th"
 198
 199 check_thread_local "first"
 200
 201 gdb_test "continue" ".*Breakpoint 2.*tls value.*" "continue to second thread"
 202 gdb_test "info thread" "Thread.*spin.*" \
 203         "at least one th in spin while stopped at second th"
 204
 205 check_thread_local "second"
 206
 207 gdb_test "continue" ".*Breakpoint 2.*tls value.*" "continue to third thread"
 208 gdb_test "info thread" ".*Thread.*spin.*" \
 209         "at least one th in spin while stopped at third th"
 210
 211 check_thread_local "third"
 212
 213 gdb_test "continue" ".*Breakpoint 3.*still alive.*" "continue to synch point"
 214
 215 set no_of_threads 0
 216 send_gdb "info thread\n"
 217 gdb_expect {
 218         -re "^info thread\[ \t\r\n\]+(\[0-9\]+) Thread.*$gdb_prompt $" {
 219            set no_of_threads $expect_out(1,string)
 220            pass "get number of threads"
 221         }
 222         -re "$gdb_prompt $" {
 223             fail "get number of threads"
 224         }
 225         timeout {
 226             fail "get number of threads (timeout)"
 227         }
 228 }
 229
 230 array set spin_threads {}
 231 unset spin_threads
 232 array set spin_threads_level {}
 233 unset spin_threads_level
 234
 235 # For each thread check its backtrace to see if it is stopped at the
 236 # spin routine.
 237 for {set i 1} {$i <= $no_of_threads} {incr i} {
 238     check_thread_stack $i spin_threads spin_threads_level
 239 }
 240
 241 ### Loop through the threads and check the values of the tls variables.
 242 ### keep track of how many threads we find in the spin routine.
 243 set thrs_in_spin 0
 244 foreach i [array names spin_threads] {
 245     if {$spin_threads($i) == 1} {
 246       incr thrs_in_spin
 247       select_thread $i
 248       set level $spin_threads_level($i)
 249       gdb_test "up $level" ".*spin.*sem_wait.*" "thread $i up"
 250       check_thread_local $i
 251     }
 252 }
 253
 254 if {$thrs_in_spin == 0} {
 255   fail "No thread backtrace reported spin (vsyscall kernel problem?)"
 256 }
 257
 258 gdb_test "continue" ".*Breakpoint 4.*before exit.*" "threads exited"
 259
 260 send_gdb "info thread\n"
 261 gdb_expect {
 262     -re ".* 1 Thread.*2 Thread.*$gdb_prompt $" {
 263         fail "Too many threads left at end"
 264     }
 265     -re ".*\\\* 1 Thread.*main.*$gdb_prompt $" {
 266         pass "Expect only base thread at end"
 267     }
 268     -re ".*No stack.*$gdb_prompt $" {
 269         fail "runaway at end"
 270     }
 271     -re ".*$gdb_prompt $" {
 272         fail "mess at end"
 273     }
 274     timeout { fail "at end (timeout)" }
 275 }
 276
 277 # Start over and do some "info address" stuff
 278 #
 279 runto spin
 280
 281 gdb_test "info address a_global" \
 282         ".*a_global.*static storage at address.*" "info address a_global"
 283
 284 setup_kfail "gdb/1294" "*-*-*"
 285 gdb_test "info address me" ".*me.*is a variable at offset.*" "info address me"
 286
 287 # Done!
 288 #
 289 gdb_exit
 290
 291 return 0