gdb/testsuite/gdb.trace/unavailable.exp

   1 # Copyright 1998, 2005, 2007-2012 Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 3 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 load_lib "trace-support.exp"
  17
  18 set testfile "unavailable"
  19 set srcfile ${testfile}.cc
  20 set executable $testfile
  21 set binfile $objdir/$subdir/$executable
  22
  23 if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \
  24         executable {debug nowarnings c++}] != "" } {
  25     untested unavailable.exp
  26     return -1
  27 }
  28
  29 set ws "\[\r\n\t \]+"
  30 set cr "\[\r\n\]+"
  31
  32 if [is_amd64_regs_target] {
  33     set fpreg "rbp"
  34     set spreg "rsp"
  35     set pcreg "rip"
  36 } elseif [is_x86_like_target] {
  37     set fpreg "ebp"
  38     set spreg "esp"
  39     set pcreg "eip"
  40 } else {
  41     set fpreg "fp"
  42     set spreg "sp"
  43     set pcreg "pc"
  44 }
  45
  46 #
  47 # Utility procs
  48 #
  49
  50 proc test_register { reg } {
  51     global gdb_prompt
  52     global hex
  53     global cr
  54
  55     gdb_test_multiple "print /x $reg" "collected $reg" {
  56         -re "\\$\[0-9\]+ = \[x0\]+$cr$gdb_prompt $" {
  57             fail "collected $reg (zero)"
  58         }
  59         -re "\\$\[0-9\]+ = $hex$cr$gdb_prompt $" {
  60             pass "collected $reg"
  61         }
  62         -re "\[Ee\]rror.*$gdb_prompt $" {
  63             fail "collected $reg (error)"
  64         }
  65     }
  66 }
  67
  68 proc test_register_unavailable { reg } {
  69     gdb_test "print /x $reg" \
  70         "<unavailable>" \
  71         "correctly report $reg as unavailable"
  72 }
  73
  74 proc prepare_for_trace_test {} {
  75     global executable
  76
  77     clean_restart $executable
  78
  79     runto_main
  80
  81     gdb_test "break begin" ".*" ""
  82     gdb_test "break end" ".*" ""
  83 }
  84
  85 proc run_trace_experiment { test_func } {
  86     global gdb_prompt
  87
  88     gdb_test "continue" \
  89         ".*Breakpoint \[0-9\]+, begin .*" \
  90         "advance to begin"
  91
  92     gdb_test_no_output "tstart" "start trace experiment"
  93
  94     gdb_test "continue" \
  95             "Continuing.*Breakpoint \[0-9\]+, end.*" \
  96             "run trace experiment"
  97     gdb_test "tstop" \
  98             "\[\r\n\]+" \
  99             "stop trace experiment"
 100     gdb_test "tfind start" \
 101             "#0  $test_func .*" \
 102             "tfind test frame"
 103 }
 104
 105 # Test that "display VAR" works as expected, assuming VAR is wholly
 106 # unavailable.
 107
 108 proc test_maybe_regvar_display { var } {
 109     global gdb_prompt
 110
 111     # Evaluating VAR's location description may throw an internal
 112     # "unavailable" exception, if for example, the value of a register
 113     # necessary for computing VAR's location is unavailable.  Such an
 114     # exception is caught, and should not cause automatic disablement
 115     # of the current display being printed.  (GDB used to disable the
 116     # current display whenever any exception was thrown.)
 117     set test "display $var"
 118     gdb_test_multiple "$test" "$test" {
 119         -re "Disabling display ? to avoid infinite recursion.*$gdb_prompt $" {
 120             fail "$test"
 121         }
 122         -re "display ${var}\r\n1: ${var} = <unavailable>\r\n$gdb_prompt $" {
 123             pass "$test"
 124         }
 125     }
 126     gdb_test "info display" ".*1:\[ \t\]+y\[ \t\]+${var}" "display ${var} is enabled"
 127
 128     gdb_test "undisp" \
 129         "" \
 130         "delete $var display" \
 131         ".*Delete all auto-display expressions.*y or n. $" \
 132         "y"
 133 }
 134
 135 #
 136 # Test procs
 137 #
 138
 139 proc gdb_collect_args_test {} { with_test_prefix "unavailable arguments" {
 140     global cr
 141     global gdb_prompt
 142
 143     prepare_for_trace_test
 144
 145     gdb_test "trace args_test_func" \
 146         "Tracepoint \[0-9\]+ at .*" \
 147         "set tracepoint"
 148
 149     # Begin the test.
 150     run_trace_experiment args_test_func
 151
 152     # Test printing the variables, and also their addresses.  We
 153     # haven't collected any stack, so there's no way GDB can figure
 154     # out the latter.
 155
 156     gdb_test "print argc" " = <unavailable>"
 157     gdb_test "print &argc" \
 158         "Can't take address of \"argc\" which isn't an lvalue\."
 159
 160     gdb_test "print argi" " = <unavailable>"
 161     gdb_test "print &argi" \
 162         "Can't take address of \"argi\" which isn't an lvalue\."
 163
 164     gdb_test "print argf" " = <unavailable>"
 165     gdb_test "print &argf" \
 166         "Can't take address of \"argf\" which isn't an lvalue\."
 167
 168     gdb_test "print argd" " = <unavailable>"
 169     gdb_test "print &argd" \
 170         "Can't take address of \"argd\" which isn't an lvalue\."
 171
 172     # struct arg as one of several args (near end of list)
 173
 174     gdb_test "print argstruct" \
 175         " = \{memberc = <unavailable>, memberi = <unavailable>, memberf = <unavailable>, memberd = <unavailable>\}"
 176
 177     gdb_test "print argstruct.memberc" " = <unavailable>"
 178     gdb_test "print argstruct.memberi" " = <unavailable>"
 179     gdb_test "print argstruct.memberf" " = <unavailable>"
 180     gdb_test "print argstruct.memberd" " = <unavailable>"
 181
 182     gdb_test "print argarray" " = \\(int \\*\\) <unavailable>"
 183
 184     gdb_test "print &argarray" \
 185         "Can't take address of \"argarray\" which isn't an lvalue\."
 186
 187     gdb_test "print argarray\[0\]" "value is not available"
 188
 189     # Test "info args"
 190     set r ""
 191     set r "${r}argc = <unavailable>${cr}"
 192     set r "${r}argi = <unavailable>${cr}"
 193     set r "${r}argf = <unavailable>${cr}"
 194     set r "${r}argd = <unavailable>${cr}"
 195     set r "${r}argstruct = {memberc = <unavailable>, memberi = <unavailable>, memberf = <unavailable>, memberd = <unavailable>}${cr}"
 196     set r "${r}argarray = <unavailable>${cr}"
 197     gdb_test "info args" "$r" "info args"
 198
 199     test_maybe_regvar_display "argc"
 200
 201     gdb_test "tfind none" \
 202         "#0  end .*" \
 203         "cease trace debugging"
 204 }}
 205
 206 proc gdb_collect_locals_test { func msg } { with_test_prefix "unavailable locals: $msg" {
 207     global cr
 208     global gdb_prompt
 209
 210     prepare_for_trace_test
 211
 212     set testline [gdb_get_line_number "set $func tracepoint here"]
 213
 214     gdb_test "trace $testline" \
 215             "Tracepoint \[0-9\]+ at .*" \
 216             "set tracepoint"
 217
 218     # Begin the test.
 219     run_trace_experiment $func
 220
 221     gdb_test "print locc" " = <unavailable>"
 222     gdb_test "print loci" " = <unavailable>"
 223     gdb_test "print locf" " = <unavailable>"
 224     gdb_test "print locd" " = <unavailable>"
 225
 226     gdb_test "print locst.memberc" " = <unavailable>"
 227     gdb_test "print locst.memberi" " = <unavailable>"
 228     gdb_test "print locst.memberf" " = <unavailable>"
 229     gdb_test "print locst.memberd" " = <unavailable>"
 230
 231     gdb_test "print locar\[0\]" " = <unavailable>"
 232     gdb_test "print locar\[1\]" " = <unavailable>"
 233     gdb_test "print locar\[2\]" " = <unavailable>"
 234     gdb_test "print locar\[3\]" " = <unavailable>"
 235
 236     # Test "info locals"
 237     set r ""
 238     set r "${r}locf = <unavailable>${cr}"
 239     set r "${r}locd = <unavailable>${cr}"
 240     set r "${r}locst = {memberc = <unavailable>, memberi = <unavailable>, memberf = <unavailable>, memberd = <unavailable>}${cr}"
 241     set r "${r}locar = {<unavailable>, <unavailable>, <unavailable>, <unavailable>}${cr}"
 242     set r "${r}i = <unavailable>${cr}"
 243     if { $func == "local_test_func" } {
 244         set r "${r}locdefst = {<No data fields>}${cr}"
 245     }
 246     set r "${r}locc = <unavailable>${cr}"
 247     set r "${r}loci = <unavailable>${cr}"
 248     gdb_test "info locals" "$r" "info locals"
 249
 250     test_maybe_regvar_display "loci"
 251
 252     gdb_test "tfind none" \
 253         "#0  end .*" \
 254         "cease trace debugging"
 255 }}
 256
 257 proc gdb_unavailable_registers_test { } { with_test_prefix "unavailable registers" {
 258     global gdb_prompt
 259     global spreg
 260     global pcreg
 261
 262     prepare_for_trace_test
 263
 264     # We'll simply re-use the globals_test_function for this test
 265     gdb_test "trace globals_test_func" \
 266             "Tracepoint \[0-9\]+ at .*" \
 267             "set tracepoint"
 268
 269     # Collect nothing.
 270
 271     # Begin the test.
 272     run_trace_experiment globals_test_func
 273
 274     # On some archs, the $sp/$pc are a real raw registers.  On others,
 275     # like x86, they're user registers.  Test both variants.
 276     test_register_unavailable "\$$spreg"
 277     test_register_unavailable "\$sp"
 278
 279     # Test reading uncollected pseudo-registers.  The set of which
 280     # depends on target.
 281     if [is_amd64_regs_target] {
 282         # Check the raw register first.
 283         test_register_unavailable "\$rax"
 284         test_register_unavailable "\$eax"
 285         test_register_unavailable "\$ax"
 286     } elseif [is_x86_like_target] {
 287         # Check the raw register first.
 288         test_register_unavailable "\$eax"
 289         test_register_unavailable "\$ax"
 290     }
 291
 292     # GDBserver always provides the PC value of regular tracepoint
 293     # hits, since it's the same as the tracepoint's address.
 294     test_register "\$$pcreg"
 295     test_register "\$pc"
 296
 297     gdb_test "info registers" \
 298         "\\*value not available\\*.*\\*value not available\\*" \
 299         "info registers, multiple registers not available"
 300
 301     gdb_test "info registers \$$spreg" \
 302         "\\*value not available\\*" \
 303         "info registers \$$spreg reports not available"
 304
 305     gdb_test "tfind none" "#0  end .*" "cease trace debugging"
 306 }}
 307
 308 proc gdb_collect_globals_test { } { with_test_prefix "collect globals" {
 309     global ws
 310     global cr
 311     global gdb_prompt
 312     global hex
 313
 314     prepare_for_trace_test
 315
 316     set testline [gdb_get_line_number "set globals_test_func tracepoint here"]
 317
 318     gdb_test "trace $testline" \
 319             "Tracepoint \[0-9\]+ at .*" \
 320             "set tracepoint"
 321
 322     # We collect the initial sizeof(pointer) bytes of derived_partial
 323     # in an attempt of collecting the vptr.  Not portable, but should
 324     # work everywhere we need to care.
 325     gdb_trace_setactions "define actions" \
 326         "" \
 327         "collect struct_b.struct_a.array\[2\]" "^$" \
 328         "collect struct_b.struct_a.array\[100\]" "^$" \
 329         \
 330         "collect a" "^$" \
 331         "collect c" "^$" \
 332         \
 333         "collect tarray\[0\].a" "^$" \
 334         "collect tarray\[1\].a" "^$" \
 335         "collect tarray\[3\].a" "^$" \
 336         "collect tarray\[3\].b" "^$" \
 337         "collect tarray\[4\].b" "^$" \
 338         "collect tarray\[5\].b" "^$" \
 339         \
 340         "collect g_string_p" "^$" \
 341         "collect g_string_partial\[1\]" "^$" \
 342         "collect g_string_partial\[2\]" "^$" \
 343         \
 344         "collect g_structref_p" "^$" \
 345         \
 346         "collect *((char *)&derived_partial)@sizeof\(void *\)" "^$" \
 347         "collect derived_whole" "^$" \
 348         \
 349         "collect virtual_partial.z" "^$"
 350
 351     # Begin the test.
 352     run_trace_experiment globals_test_func
 353
 354     gdb_test "print globalc" " = <unavailable>"
 355     gdb_test "print globali" " = <unavailable>"
 356     gdb_test "print globalf" " = <unavailable>"
 357     gdb_test "print globald" " = <unavailable>"
 358
 359     gdb_test "print globalstruct.memberc" " = <unavailable>"
 360     gdb_test "print globalstruct.memberi" " = <unavailable>"
 361     gdb_test "print globalstruct.memberf" " = <unavailable>"
 362     gdb_test "print globalstruct.memberd" " = <unavailable>"
 363
 364     gdb_test "print globalstruct" \
 365             " = {memberc = <unavailable>, memberi = <unavailable>, memberf = <unavailable>, memberd = <unavailable>}"
 366
 367     gdb_test "print globalp == &globalstruct" \
 368             "value is not available" \
 369             "can't compare using non collected global pointer"
 370
 371     gdb_test "print globalarr\[1\]" " = <unavailable>"
 372     gdb_test "print globalarr\[2\]" " = <unavailable>"
 373     gdb_test "print globalarr\[3\]" " = <unavailable>"
 374
 375     gdb_test "print struct_b" \
 376         " = {d = <unavailable>, ef = <unavailable>, struct_a = {a = <unavailable>, b = <unavailable>, array = {<unavailable>, <unavailable>, -1431655766, <unavailable> <repeats 97 times>, -1431655766, <unavailable> <repeats 9899 times>}, ptr = <unavailable>, bitfield = <unavailable>}, s = <unavailable>, static static_struct_a = {a = <unavailable>, b = <unavailable>, array = {<unavailable> <repeats 10000 times>}, ptr = <unavailable>, bitfield = <unavailable>}, string = <unavailable>}"
 377
 378     gdb_test "print /x struct_b" \
 379         " = {d = <unavailable>, ef = <unavailable>, struct_a = {a = <unavailable>, b = <unavailable>, array = {<unavailable>, <unavailable>, 0xaaaaaaaa, <unavailable> <repeats 97 times>, 0xaaaaaaaa, <unavailable> <repeats 9899 times>}, ptr = <unavailable>, bitfield = <unavailable>}, s = <unavailable>, static static_struct_a = {a = <unavailable>, b = <unavailable>, array = {<unavailable> <repeats 10000 times>}, ptr = <unavailable>, bitfield = <unavailable>}, string = <unavailable>}"
 380
 381     gdb_test "print /x struct_b.struct_a" \
 382         " = {a = <unavailable>, b = <unavailable>, array = {<unavailable>, <unavailable>, 0xaaaaaaaa, <unavailable> <repeats 97 times>, 0xaaaaaaaa, <unavailable> <repeats 9899 times>}, ptr = <unavailable>, bitfield = <unavailable>}"
 383
 384     gdb_test "print /x struct_b.struct_a.array" \
 385         " = {<unavailable>, <unavailable>, 0xaaaaaaaa, <unavailable> <repeats 97 times>, 0xaaaaaaaa, <unavailable> <repeats 9899 times>}"
 386
 387     gdb_test "print /x struct_b.struct_a.array\[0\]" " = <unavailable>"
 388
 389     gdb_test "print /x struct_b.struct_a.array\[2\]" " = 0xaaaaaaaa"
 390
 391     # Check the target doesn't overcollect.  GDB used to merge memory
 392     # ranges to collect if they were close enough (collecting the hole
 393     # as well), but does not do that anymore.  It's plausible that a
 394     # target may do this on its end, but as of this writing, no known
 395     # target does it.
 396     gdb_test "print {a, b, c}" \
 397         " = \\{1, <unavailable>, 3\\}" \
 398         "No overcollect of almost but not quite adjacent memory ranges"
 399
 400     # Check <unavailable> isn't confused with 0 in array element repetitions
 401
 402     gdb_test_no_output "set print repeat 1"
 403
 404     gdb_test "print /x tarray" \
 405         " = \{\{a = 0x0, b = <unavailable>\} <repeats 2 times>, \{a = <unavailable>, b = <unavailable>\}, \{a = 0x0, b = 0x0\}, \{a = <unavailable>, b = 0x0\} <repeats 2 times>, \{a = <unavailable>, b = <unavailable>\} <repeats 2 times>\}" \
 406         "<unavailable> is not the same as 0 in array element repetitions"
 407
 408     gdb_test_no_output "set print repeat 10"
 409
 410     # Check that value repeat handles unavailable-ness.
 411     gdb_test "print *tarray@3" " = \\{\\{a = 0, b = <unavailable>\\}, \\{a = 0, b = <unavailable>\\}, \\{a = <unavailable>, b = <unavailable>\\}\\}"
 412
 413     # Static fields
 414
 415     gdb_test "print struct_b.static_struct_a" \
 416         " = {a = <unavailable>, b = <unavailable>, array = {<unavailable> <repeats 10000 times>}, ptr = <unavailable>, bitfield = <unavailable>}"
 417
 418     # Bitfields
 419
 420     gdb_test "print struct_b.struct_a.bitfield" " = <unavailable>"
 421
 422     # References
 423
 424     gdb_test "print g_int" " = <unavailable>"
 425
 426     gdb_test "print g_ref" \
 427         "\\(int &\\) @$hex: <unavailable>" \
 428         "global reference shows address but not value"
 429
 430     gdb_test "print *&g_ref" \
 431         "\\$\[0-9\]+ = <unavailable>$cr" \
 432         "referenced integer was not collected (taking address of reference)"
 433
 434     gdb_test "print *g_structref_p" \
 435         " = {d = <unavailable>, ref = <unavailable>}"
 436
 437     # Strings
 438
 439     # Const string is always available, even when not collected.
 440     gdb_test "print g_const_string" \
 441         " = \"hello world\"$cr" \
 442         "non collected const string is still printable"
 443
 444     gdb_test "print g_string_p" \
 445         " = $hex \"hello world\"" \
 446         "printing constant string through collected pointer"
 447
 448     gdb_test "print g_string_unavail" \
 449         " = \{<unavailable> <repeats 12 times>\}" \
 450         "printing non collected string"
 451
 452     # Incomplete strings print as an array.
 453     gdb_test "print g_string_partial" \
 454         "\\$\[0-9\]+ = \{<unavailable>, 101 'e', 108 'l', <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>\}" \
 455         "printing partially collected string"
 456
 457     # It is important for this test that the last examined value is
 458     # <unavailable>, to exercise the case of the $__ convenience
 459     # variable being set to <unavailable> without error.
 460     set msg "examining partially collected object"
 461     gdb_test_multiple "x /10x &struct_b" "$msg" {
 462         -re "$hex <struct_b>:${ws}<unavailable>${ws}<unavailable>${ws}<unavailable>${ws}<unavailable>$cr$hex <struct_b\\+16>:${ws}<unavailable>${ws}<unavailable>${ws}0xaaaaaaaa${ws}<unavailable>$cr$hex <struct_b\\+32>:${ws}<unavailable>${ws}<unavailable>$cr$gdb_prompt $" {
 463             pass "$msg"
 464         }
 465         -re "value is not available" {
 466             fail "$msg"
 467         }
 468     }
 469
 470     gdb_test "p \$__" " = <unavailable>" "last examined value was <unavailable>"
 471
 472     # This tests that building the array does not require accessing
 473     # g_int's contents.
 474     gdb_test "print { 1, g_int, 3 }" \
 475         " = \\{1, <unavailable>, 3\\}" \
 476         "build array from unavailable value"
 477
 478     # Note, depends on previous test.
 479     gdb_test "print \$\[1\]" \
 480         " = <unavailable>" \
 481         "subscript a non-memory rvalue array, accessing an unvailable element"
 482
 483     # Access a field of a non-lazy value, making sure the
 484     # unavailable-ness is propagated.  History values are easy
 485     # non-lazy values, so use those.  The first test just sets up for
 486     # the second.
 487     gdb_test "print g_smallstruct" " = \\{member = <unavailable>\\}"
 488     gdb_test "print \$.member" " = <unavailable>"
 489
 490     # Cast to baseclass, checking the unavailable-ness is propagated.
 491     gdb_test "print (small_struct) g_smallstruct_b" " = \\{member = <unavailable>\\}"
 492
 493     # Same cast, but starting from a non-lazy, value.
 494     gdb_test "print g_smallstruct_b" " = \\{<small_struct> = \\{member = <unavailable>\\}, <No data fields>\\}"
 495     gdb_test "print (small_struct) \$" " = \\{member = <unavailable>\\}"
 496
 497     gdb_test_no_output "set print object on"
 498
 499     with_test_prefix "print object on" {
 500         # With print object on, printing a pointer may need to fetch
 501         # the pointed-to object, to check its run-time type.  Make
 502         # sure that fails gracefully and transparently when the
 503         # pointer itself is unavailable.
 504         gdb_test "print virtualp" " = \\(Virtual \\*\\) <unavailable>"
 505
 506         # no vtable pointer available
 507         gdb_test "print derived_unavail" \
 508             " = {<Middle> = <unavailable>, _vptr.Derived = <unavailable>, z = <unavailable>}"
 509
 510         # vtable pointer available, but nothing else
 511         gdb_test "print derived_partial" \
 512             " = \\(Derived\\) {<Middle> = {<Base> = <unavailable>, _vptr.Middle = <unavailable>, y = <unavailable>}, _vptr.Derived = $hex, z = <unavailable>}"
 513
 514         # whole object available
 515         gdb_test "print derived_whole" \
 516             " = \\(Derived\\) {<Middle> = {<Base> = {x = 2}, _vptr.Middle = $hex, y = 3}, _vptr.Derived = $hex, z = 4}"
 517     }
 518
 519     gdb_test_no_output "set print object off"
 520
 521     with_test_prefix "print object off" {
 522         gdb_test "print virtualp" " = \\(Virtual \\*\\) <unavailable>"
 523
 524         # no vtable pointer available
 525         gdb_test "print derived_unavail" \
 526             " = {<Middle> = <unavailable>, _vptr.Derived = <unavailable>, z = <unavailable>}"
 527
 528         # vtable pointer available, but nothing else
 529         gdb_test "print derived_partial" \
 530             " = {<Middle> = {<Base> = <unavailable>, _vptr.Middle = <unavailable>, y = <unavailable>}, _vptr.Derived = $hex, z = <unavailable>}"
 531
 532         # whole object available
 533         gdb_test "print derived_whole" \
 534             " = {<Middle> = {<Base> = {x = 2}, _vptr.Middle = $hex, y = 3}, _vptr.Derived = $hex, z = 4}"
 535     }
 536
 537     # An instance of a virtual class where we collected everything but
 538     # the vptr.
 539     gdb_test "print virtual_partial" \
 540         " = {_vptr.Virtual = <unavailable>, z = 0}"
 541
 542     gdb_test "tfind none" \
 543         "#0  end .*" \
 544         "cease trace debugging"
 545 }}
 546
 547 proc gdb_trace_collection_test {} {
 548     gdb_collect_globals_test
 549     gdb_unavailable_registers_test
 550
 551     gdb_collect_args_test
 552     gdb_collect_locals_test local_test_func "auto locals"
 553     gdb_collect_locals_test reglocal_test_func "register locals"
 554     gdb_collect_locals_test statlocal_test_func "static locals"
 555 }
 556
 557 clean_restart $executable
 558 runto_main
 559
 560 if { ![gdb_target_supports_trace] } then {
 561     unsupported "Current target does not support trace"
 562     return 1;
 563 }
 564
 565 # Body of test encased in a proc so we can return prematurely.
 566 gdb_trace_collection_test
 567
 568 # Finished!
 569 gdb_test "tfind none" ".*" ""