gdb/testsuite/gdb.trace/unavailable.exp

   1 # Copyright 1998-2021 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 standard_testfile unavailable.cc
  19 set executable $testfile
  20
  21 if {[prepare_for_testing "failed to prepare" $testfile $srcfile \
  22          {debug nowarnings c++ nopie}]} {
  23     return -1
  24 }
  25
  26 set ws "\[\r\n\t \]+"
  27 set cr "\[\r\n\]+"
  28
  29 #
  30 # Utility procs
  31 #
  32
  33 proc test_register { reg } {
  34     global gdb_prompt
  35     global hex
  36     global cr
  37
  38     gdb_test_multiple "print /x $reg" "collected $reg" {
  39         -re "\\$\[0-9\]+ = \[x0\]+$cr$gdb_prompt $" {
  40             fail "collected $reg (zero)"
  41         }
  42         -re "\\$\[0-9\]+ = $hex$cr$gdb_prompt $" {
  43             pass "collected $reg"
  44         }
  45         -re "\[Ee\]rror.*$gdb_prompt $" {
  46             fail "collected $reg (error)"
  47         }
  48     }
  49 }
  50
  51 proc test_register_unavailable { reg } {
  52     gdb_test "print /x $reg" \
  53         "<unavailable>" \
  54         "correctly report $reg as unavailable"
  55 }
  56
  57 proc prepare_for_trace_test {} {
  58     global executable
  59
  60     clean_restart $executable
  61
  62     runto_main
  63
  64     gdb_breakpoint "begin" qualified
  65     gdb_breakpoint "end" qualified
  66 }
  67
  68 proc run_trace_experiment { test_func } {
  69     global gdb_prompt
  70
  71     gdb_test "continue" \
  72         ".*Breakpoint \[0-9\]+, begin .*" \
  73         "advance to begin"
  74
  75     gdb_test_no_output "tstart" "start trace experiment"
  76
  77     gdb_test "continue" \
  78             "Continuing.*Breakpoint \[0-9\]+, end.*" \
  79             "run trace experiment"
  80     gdb_test "tstop" \
  81             "\[\r\n\]+" \
  82             "stop trace experiment"
  83     gdb_test "tfind start" \
  84             "#0  $test_func .*" \
  85             "tfind test frame"
  86 }
  87
  88 # Test that "display VAR" works as expected, assuming VAR is wholly
  89 # unavailable.
  90
  91 proc test_maybe_regvar_display { var } {
  92     global gdb_prompt
  93
  94     # Evaluating VAR's location description may throw an internal
  95     # "unavailable" exception, if for example, the value of a register
  96     # necessary for computing VAR's location is unavailable.  Such an
  97     # exception is caught, and should not cause automatic disablement
  98     # of the current display being printed.  (GDB used to disable the
  99     # current display whenever any exception was thrown.)
 100     set test "display $var"
 101     gdb_test_multiple "$test" "$test" {
 102         -re "Disabling display ? to avoid infinite recursion.*$gdb_prompt $" {
 103             fail "$test"
 104         }
 105         -re "display ${var}\r\n1: ${var} = <unavailable>\r\n$gdb_prompt $" {
 106             pass "$test"
 107         }
 108     }
 109     gdb_test "info display" ".*1:\[ \t\]+y\[ \t\]+${var}" "display ${var} is enabled"
 110
 111     gdb_test "undisp" \
 112         "" \
 113         "delete $var display" \
 114         ".*Delete all auto-display expressions.*y or n. $" \
 115         "y"
 116 }
 117
 118 #
 119 # Test procs
 120 #
 121
 122 proc gdb_collect_args_test_1 {} {
 123     global cr
 124
 125     # Test printing the variables, and also their addresses.  We
 126     # haven't collected any stack, so there's no way GDB can figure
 127     # out the latter.
 128
 129     gdb_test "print argc" " = <unavailable>"
 130     gdb_test "print &argc" \
 131         "Can't take address of \"argc\" which isn't an lvalue\."
 132
 133     gdb_test "print argi" " = <unavailable>"
 134     gdb_test "print &argi" \
 135         "Can't take address of \"argi\" which isn't an lvalue\."
 136
 137     gdb_test "print argf" " = <unavailable>"
 138     gdb_test "print &argf" \
 139         "Can't take address of \"argf\" which isn't an lvalue\."
 140
 141     gdb_test "print argd" " = <unavailable>"
 142     gdb_test "print &argd" \
 143         "Can't take address of \"argd\" which isn't an lvalue\."
 144
 145     # struct arg as one of several args (near end of list)
 146
 147     gdb_test "print argstruct" " = <unavailable>"
 148
 149     gdb_test "print argstruct.memberc" " = <unavailable>"
 150     gdb_test "print argstruct.memberi" " = <unavailable>"
 151     gdb_test "print argstruct.memberf" " = <unavailable>"
 152     gdb_test "print argstruct.memberd" " = <unavailable>"
 153
 154     gdb_test "print argarray" " = <unavailable>"
 155
 156     gdb_test "print &argarray" \
 157         "Can't take address of \"argarray\" which isn't an lvalue\."
 158
 159     gdb_test "print argarray\[0\]" "value is not available"
 160
 161     # Test "info args"
 162     set r ""
 163     set r "${r}argc = <unavailable>${cr}"
 164     set r "${r}argi = <unavailable>${cr}"
 165     set r "${r}argf = <unavailable>${cr}"
 166     set r "${r}argd = <unavailable>${cr}"
 167     set r "${r}argstruct = <unavailable>${cr}"
 168     set r "${r}argarray = <unavailable>${cr}"
 169     gdb_test "info args" "$r" "info args"
 170
 171     test_maybe_regvar_display "argc"
 172 }
 173
 174 proc gdb_collect_args_test {} {
 175     with_test_prefix "unavailable arguments" {
 176         global gdb_prompt
 177         global testfile srcdir subdir binfile
 178         global trace_file_targets
 179
 180         prepare_for_trace_test
 181
 182         gdb_test "trace args_test_func" \
 183             "Tracepoint \[0-9\]+ at .*" \
 184             "set tracepoint"
 185
 186         # Begin the test.
 187         run_trace_experiment args_test_func
 188
 189         gdb_collect_args_test_1
 190
 191         gdb_test "tfind none" \
 192             "#0  end .*" \
 193             "cease trace debugging"
 194
 195         set tracefile [standard_output_file ${testfile}]
 196         gdb_test "tsave ${tracefile}.args.tfile" \
 197             "Trace data saved to file '${tracefile}.args.tfile'\.\\r" \
 198             "tsave ${testfile}.args.tfile"
 199         gdb_test "tsave -ctf ${tracefile}.args.ctf" \
 200             "Trace data saved to directory '${tracefile}.args.ctf'\.\\r" \
 201             "save ctf trace file"
 202
 203         foreach target_name ${trace_file_targets} {
 204             # Restart GDB and read the trace data in ${TARGET_NAME} target.
 205             gdb_exit
 206             gdb_start
 207             gdb_reinitialize_dir $srcdir/$subdir
 208             gdb_file_cmd $binfile
 209             gdb_test "target ${target_name} ${tracefile}.args.${target_name}" ".*" \
 210                 "change to ${target_name} target"
 211
 212             with_test_prefix "${target_name}" {
 213                 gdb_test "tfind start" "#0  args_test_func .*" \
 214                     "tfind test frame"
 215                 gdb_collect_args_test_1
 216             }
 217         }
 218     }
 219 }
 220
 221 proc gdb_collect_locals_test_1 { func } {
 222     global cr
 223
 224     gdb_test "print locc" " = <unavailable>"
 225     gdb_test "print loci" " = <unavailable>"
 226     gdb_test "print locf" " = <unavailable>"
 227     gdb_test "print locd" " = <unavailable>"
 228
 229     gdb_test "print locst.memberc" " = <unavailable>"
 230     gdb_test "print locst.memberi" " = <unavailable>"
 231     gdb_test "print locst.memberf" " = <unavailable>"
 232     gdb_test "print locst.memberd" " = <unavailable>"
 233
 234     gdb_test "print locar\[0\]" " = <unavailable>"
 235     gdb_test "print locar\[1\]" " = <unavailable>"
 236     gdb_test "print locar\[2\]" " = <unavailable>"
 237     gdb_test "print locar\[3\]" " = <unavailable>"
 238
 239     # Test "info locals"
 240     set r ""
 241     set r "${r}locf = <unavailable>${cr}"
 242     set r "${r}locd = <unavailable>${cr}"
 243     set r "${r}locst = <unavailable>${cr}"
 244     set r "${r}locar = <unavailable>${cr}"
 245     set r "${r}i = <unavailable>${cr}"
 246     if { $func == "local_test_func" } {
 247         set r "${r}locdefst = <unavailable>${cr}"
 248     }
 249     set r "${r}locc = <unavailable>${cr}"
 250     set r "${r}loci = <unavailable>${cr}"
 251     gdb_test "info locals" "$r" "info locals"
 252
 253     test_maybe_regvar_display "loci"
 254 }
 255
 256 proc gdb_collect_locals_test { func msg } {
 257     with_test_prefix "unavailable locals: $msg" {
 258         global gdb_prompt
 259         global testfile srcdir subdir binfile
 260         global trace_file_targets
 261
 262         prepare_for_trace_test
 263
 264         set testline [gdb_get_line_number "set $func tracepoint here"]
 265
 266         gdb_test "trace $testline" \
 267             "Tracepoint \[0-9\]+ at .*" \
 268             "set tracepoint"
 269
 270         # Begin the test.
 271         run_trace_experiment $func
 272
 273         gdb_collect_locals_test_1 $func
 274
 275         gdb_test "tfind none" \
 276             "#0  end .*" \
 277             "cease trace debugging"
 278
 279         set tracefile [standard_output_file ${testfile}]
 280         gdb_test "tsave ${tracefile}.locals.tfile" \
 281             "Trace data saved to file '${tracefile}.locals.tfile'\.\\r" \
 282             "tsave ${testfile}.locals.tfile"
 283         gdb_test "tsave -ctf ${tracefile}.locals.ctf" \
 284             "Trace data saved to directory '${tracefile}.locals.ctf'\.\\r" \
 285             "save ctf trace file"
 286
 287         foreach target_name ${trace_file_targets} {
 288             # Restart GDB and read the trace data in ${TARGET_NAME} target.
 289             gdb_exit
 290             gdb_start
 291             gdb_reinitialize_dir $srcdir/$subdir
 292             gdb_file_cmd $binfile
 293             gdb_test "target ${target_name} ${tracefile}.locals.${target_name}" ".*" \
 294                 "change to ${target_name} target"
 295
 296             with_test_prefix "${target_name}" {
 297                 gdb_test "tfind start" "#0  $func .*" \
 298                     "tfind test frame"
 299                 gdb_collect_locals_test_1 $func
 300             }
 301         }
 302     }
 303 }
 304
 305 proc gdb_unavailable_registers_test_1 { } {
 306     global spreg
 307     global pcreg
 308
 309     # On some archs, the $sp/$pc are a real raw registers.  On others,
 310     # like x86, they're user registers.  Test both variants.
 311     test_register_unavailable "\$$spreg"
 312     test_register_unavailable "\$sp"
 313
 314     # Test reading uncollected pseudo-registers.  The set of which
 315     # depends on target.
 316     if [is_amd64_regs_target] {
 317         # Check the raw register first.
 318         test_register_unavailable "\$rax"
 319         test_register_unavailable "\$eax"
 320         test_register_unavailable "\$ax"
 321     } elseif [is_x86_like_target] {
 322         # Check the raw register first.
 323         test_register_unavailable "\$eax"
 324         test_register_unavailable "\$ax"
 325     }
 326
 327     # GDBserver always provides the PC value of regular tracepoint
 328     # hits, since it's the same as the tracepoint's address.
 329     test_register "\$$pcreg"
 330     test_register "\$pc"
 331
 332     gdb_test "info registers" \
 333         ".*<unavailable>.*<unavailable>.*" \
 334         "info registers, multiple registers not available"
 335
 336     gdb_test "info registers \$$spreg" \
 337         "<unavailable>" \
 338         "info registers \$$spreg reports not available"
 339 }
 340
 341 proc gdb_unavailable_registers_test { } {
 342     with_test_prefix "unavailable registers" {
 343         global testfile srcdir subdir binfile
 344         global trace_file_targets
 345
 346         prepare_for_trace_test
 347
 348         # We'll simply re-use the globals_test_function for this test
 349         gdb_test "trace globals_test_func" \
 350             "Tracepoint \[0-9\]+ at .*" \
 351             "set tracepoint"
 352
 353         # Collect nothing.
 354
 355         # Begin the test.
 356         run_trace_experiment globals_test_func
 357
 358         gdb_unavailable_registers_test_1
 359
 360         gdb_test "tfind none" "#0  end .*" "cease trace debugging"
 361
 362         set tracefile [standard_output_file ${testfile}]
 363         gdb_test "tsave ${tracefile}.registers.tfile" \
 364             "Trace data saved to file '${tracefile}.registers.tfile'\.\\r" \
 365             "tsave ${testfile}.registers.tfile"
 366         gdb_test "tsave -ctf ${tracefile}.registers.ctf" \
 367             "Trace data saved to directory '${tracefile}.registers.ctf'\.\\r" \
 368             "save ctf trace file"
 369
 370         foreach target_name ${trace_file_targets} {
 371             # Restart GDB and read the trace data in ${TARGET_NAME} target.
 372             gdb_exit
 373             gdb_start
 374             gdb_reinitialize_dir $srcdir/$subdir
 375             gdb_file_cmd $binfile
 376             gdb_test "target ${target_name} ${tracefile}.registers.${target_name}" ".*" \
 377                 "change to ${target_name} target"
 378
 379             with_test_prefix "${target_name}" {
 380                 gdb_test "tfind start" "#0  globals_test_func .*" \
 381                     "tfind test frame"
 382                 gdb_unavailable_registers_test_1
 383             }
 384         }
 385     }
 386 }
 387
 388 proc gdb_unavailable_floats_1 { } {
 389     global gdb_prompt
 390
 391     # Necessarily target specific.
 392     if {[istarget "x86_64-*-*"] || [istarget i?86-*]} {
 393         send_gdb "info float\n"
 394         gdb_expect_list "info float" ".*$gdb_prompt $" {
 395             "Status Word:         <unavailable>"
 396             "Control Word:        <unavailable>"
 397             "Tag Word:            <unavailable>"
 398             "Instruction Pointer: <unavailable>:<unavailable>"
 399             "Operand Pointer:     <unavailable>:<unavailable>"
 400             "Opcode:              <unavailable>"
 401         }
 402     }
 403 }
 404
 405 proc gdb_unavailable_floats { } {
 406     with_test_prefix "unavailable floats" {
 407         global testfile srcdir subdir binfile
 408         global trace_file_targets
 409
 410         prepare_for_trace_test
 411
 412         # We'll simply re-use the globals_test_function for this test
 413         gdb_test "trace globals_test_func" \
 414             "Tracepoint \[0-9\]+ at .*" \
 415             "set tracepoint"
 416
 417         # Collect nothing.
 418
 419         # Begin the test.
 420         run_trace_experiment globals_test_func
 421
 422         gdb_unavailable_floats_1
 423
 424         gdb_test "tfind none" "#0  end .*" "cease trace debugging"
 425
 426         set tracefile [standard_output_file ${testfile}]
 427         gdb_test "tsave ${tracefile}.floats.tfile" \
 428             "Trace data saved to file '${tracefile}.floats.tfile'\.\\r" \
 429             "tsave ${testfile}.floats.tfile"
 430         gdb_test "tsave -ctf ${tracefile}.floats.ctf" \
 431             "Trace data saved to directory '${tracefile}.floats.ctf'\.\\r" \
 432             "save ctf trace file"
 433
 434         foreach target_name ${trace_file_targets} {
 435             # Restart GDB and read the trace data in ${TARGET_NAME} target.
 436             gdb_exit
 437             gdb_start
 438             gdb_reinitialize_dir $srcdir/$subdir
 439             gdb_file_cmd $binfile
 440             gdb_test "target ${target_name} ${tracefile}.floats.${target_name}" ".*" \
 441                 "change to ${target_name} target"
 442
 443             with_test_prefix "${target_name}" {
 444                 gdb_test "tfind start" "#0  globals_test_func .*" \
 445                     "tfind test frame"
 446                 gdb_unavailable_floats_1
 447             }
 448         }
 449     }
 450 }
 451
 452 proc gdb_collect_globals_test_1 { } {
 453     global ws
 454     global cr
 455     global gdb_prompt
 456     global hex
 457
 458     gdb_test "print globalc" " = <unavailable>"
 459     gdb_test "print globali" " = <unavailable>"
 460     gdb_test "print globalf" " = <unavailable>"
 461     gdb_test "print globald" " = <unavailable>"
 462
 463     gdb_test "print globalstruct.memberc" " = <unavailable>"
 464     gdb_test "print globalstruct.memberi" " = <unavailable>"
 465     gdb_test "print globalstruct.memberf" " = <unavailable>"
 466     gdb_test "print globalstruct.memberd" " = <unavailable>"
 467
 468     gdb_test "print globalstruct" " = <unavailable>"
 469
 470     gdb_test "print globalp == &globalstruct" \
 471         "value is not available" \
 472         "can't compare using non collected global pointer"
 473
 474     gdb_test "print globalarr\[1\]" " = <unavailable>"
 475     gdb_test "print globalarr\[2\]" " = <unavailable>"
 476     gdb_test "print globalarr\[3\]" " = <unavailable>"
 477
 478     gdb_test "print struct_b" \
 479         " = {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>}"
 480
 481     gdb_test "print /x struct_b" \
 482         " = {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>}"
 483
 484     gdb_test "print /x struct_b.struct_a" \
 485         " = {a = <unavailable>, b = <unavailable>, array = {<unavailable>, <unavailable>, 0xaaaaaaaa, <unavailable> <repeats 97 times>, 0xaaaaaaaa, <unavailable> <repeats 9899 times>}, ptr = <unavailable>, bitfield = <unavailable>}"
 486
 487     gdb_test "print /x struct_b.struct_a.array" \
 488         " = {<unavailable>, <unavailable>, 0xaaaaaaaa, <unavailable> <repeats 97 times>, 0xaaaaaaaa, <unavailable> <repeats 9899 times>}"
 489
 490     gdb_test "print /x struct_b.struct_a.array\[0\]" " = <unavailable>"
 491
 492     gdb_test "print /x struct_b.struct_a.array\[2\]" " = 0xaaaaaaaa"
 493
 494     # Check the target doesn't overcollect.  GDB used to merge memory
 495     # ranges to collect if they were close enough (collecting the hole
 496     # as well), but does not do that anymore.  It's plausible that a
 497     # target may do this on its end, but as of this writing, no known
 498     # target does it.
 499     gdb_test "print {a, b, c}" \
 500         " = \\{1, <unavailable>, 3\\}" \
 501         "No overcollect of almost but not quite adjacent memory ranges"
 502
 503     # Check <unavailable> isn't confused with 0 in array element repetitions
 504
 505     gdb_test_no_output "set print repeat 1"
 506
 507     gdb_test "print /x tarray" \
 508         " = \{\{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>\}" \
 509         "<unavailable> is not the same as 0 in array element repetitions"
 510
 511     gdb_test_no_output "set print repeat 10"
 512
 513     # Check that value repeat handles unavailable-ness.
 514     gdb_test "print *tarray@3" " = \\{\\{a = 0, b = <unavailable>\\}, \\{a = 0, b = <unavailable>\\}, \\{a = <unavailable>, b = <unavailable>\\}\\}"
 515
 516     # Static fields
 517
 518     gdb_test "print struct_b.static_struct_a" " = <unavailable>"
 519
 520     # Bitfields
 521
 522     gdb_test "print struct_b.struct_a.bitfield" " = <unavailable>"
 523
 524     # References
 525
 526     gdb_test "print g_int" " = <unavailable>"
 527
 528     gdb_test "print g_ref" \
 529         "\\(int &\\) @$hex: <unavailable>" \
 530         "global reference shows address but not value"
 531
 532     gdb_test "print *&g_ref" \
 533         "\\$\[0-9\]+ = <unavailable>$cr" \
 534         "referenced integer was not collected (taking address of reference)"
 535
 536     gdb_test "print *g_structref_p" " = <unavailable>"
 537
 538     # Strings
 539
 540     # Const string is always available, even when not collected.
 541     gdb_test "print g_const_string" \
 542         " = \"hello world\"$cr" \
 543         "non collected const string is still printable"
 544
 545     gdb_test "print g_string_p" \
 546         " = $hex <g_const_string> \"hello world\"" \
 547         "printing constant string through collected pointer"
 548
 549     gdb_test "print g_string_unavail" \
 550         " = <unavailable>" \
 551         "printing non collected string"
 552
 553     # Incomplete strings print as an array.
 554     gdb_test "print g_string_partial" \
 555         "\\$\[0-9\]+ = \{<unavailable>, 101 'e', 108 'l', <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>, <unavailable>\}" \
 556         "printing partially collected string"
 557
 558     # It is important for this test that the last examined value is
 559     # <unavailable>, to exercise the case of the $__ convenience
 560     # variable being set to <unavailable> without error.
 561     set msg "examining partially collected object"
 562     gdb_test_multiple "x /10x &struct_b" "$msg" {
 563         -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 $" {
 564             pass "$msg"
 565         }
 566         -re "value is not available" {
 567             fail "$msg"
 568         }
 569     }
 570
 571     gdb_test "p \$__" " = <unavailable>" "last examined value was <unavailable>"
 572
 573     # This tests that building the array does not require accessing
 574     # g_int's contents.
 575     gdb_test "print { 1, g_int, 3 }" \
 576         " = \\{1, <unavailable>, 3\\}" \
 577         "build array from unavailable value"
 578
 579     # Note, depends on previous test.
 580     gdb_test "print \$\[1\]" \
 581         " = <unavailable>" \
 582         "subscript a non-memory rvalue array, accessing an unvailable element"
 583
 584     # Access a field of a non-lazy value, making sure the
 585     # unavailable-ness is propagated.  History values are easy
 586     # non-lazy values, so use those.  The first test just sets up for
 587     # the second.
 588     gdb_test "print g_smallstruct" " = <unavailable>"
 589     gdb_test "print \$.member" " = <unavailable>"
 590
 591     # Cast to baseclass, checking the unavailable-ness is propagated.
 592     gdb_test "print (small_struct) g_smallstruct_b" " = <unavailable>"
 593
 594     # Same cast, but starting from a non-lazy, value.
 595     gdb_test "print g_smallstruct_b" " = <unavailable>"
 596     gdb_test "print (small_struct) \$" " = <unavailable>"
 597
 598     gdb_test_no_output "set print object on"
 599
 600     with_test_prefix "print object on" {
 601         # With print object on, printing a pointer may need to fetch
 602         # the pointed-to object, to check its run-time type.  Make
 603         # sure that fails gracefully and transparently when the
 604         # pointer itself is unavailable.
 605         gdb_test "print virtualp" " = <unavailable>"
 606
 607         # no vtable pointer available
 608         gdb_test "print derived_unavail" " = <unavailable>"
 609
 610         # vtable pointer available, but nothing else
 611         gdb_test "print derived_partial" \
 612             " = \\(Derived\\) {<Middle> = {<Base> = <unavailable>, _vptr.Middle = <unavailable>, y = <unavailable>}, _vptr.Derived = $hex <vtable for Derived.*>, z = <unavailable>}"
 613
 614         # whole object available
 615         gdb_test "print derived_whole" \
 616             " = \\(Derived\\) {<Middle> = {<Base> = {x = 2}, _vptr.Middle = ${hex}( <\[^>]*>)?, y = 3}, _vptr.Derived = $hex <vtable for Derived.*>, z = 4}"
 617     }
 618
 619     gdb_test_no_output "set print object off"
 620
 621     with_test_prefix "print object off" {
 622         gdb_test "print virtualp" " = <unavailable>"
 623
 624         # no vtable pointer available
 625         gdb_test "print derived_unavail" \
 626             " = <unavailable>"
 627
 628         # vtable pointer available, but nothing else
 629         gdb_test "print derived_partial" \
 630             " = {<Middle> = {<Base> = <unavailable>, _vptr.Middle = <unavailable>, y = <unavailable>}, _vptr.Derived = $hex <vtable for Derived.*>, z = <unavailable>}"
 631
 632         # whole object available
 633         gdb_test "print derived_whole" \
 634             " = {<Middle> = {<Base> = {x = 2}, _vptr.Middle = ${hex}( <\[^>]*>)?, y = 3}, _vptr.Derived = $hex <vtable for Derived.*>, z = 4}"
 635     }
 636
 637     # An instance of a virtual class where we collected everything but
 638     # the vptr.
 639     gdb_test "print virtual_partial" \
 640         " = {_vptr.Virtual = <unavailable>, z = 0}"
 641 }
 642
 643 proc gdb_collect_globals_test { } {
 644     with_test_prefix "collect globals" {
 645         global testfile binfile srcdir subdir
 646         global trace_file_targets
 647
 648         prepare_for_trace_test
 649
 650         set testline [gdb_get_line_number "set globals_test_func tracepoint here"]
 651
 652         gdb_test "trace $testline" \
 653             "Tracepoint \[0-9\]+ at .*" \
 654             "set tracepoint"
 655
 656         # We collect the initial sizeof(pointer) bytes of derived_partial
 657         # in an attempt of collecting the vptr.  Not portable, but should
 658         # work everywhere we need to care.
 659         gdb_trace_setactions "define actions" \
 660             "" \
 661             "collect struct_b.struct_a.array\[2\]" "^$" \
 662             "collect struct_b.struct_a.array\[100\]" "^$" \
 663             \
 664             "collect a" "^$" \
 665             "collect c" "^$" \
 666             \
 667             "collect tarray\[0\].a" "^$" \
 668             "collect tarray\[1\].a" "^$" \
 669             "collect tarray\[3\].a" "^$" \
 670             "collect tarray\[3\].b" "^$" \
 671             "collect tarray\[4\].b" "^$" \
 672             "collect tarray\[5\].b" "^$" \
 673             \
 674             "collect g_string_p" "^$" \
 675             "collect g_string_partial\[1\]" "^$" \
 676             "collect g_string_partial\[2\]" "^$" \
 677             \
 678             "collect g_structref_p" "^$" \
 679             \
 680             "collect *((char *)&derived_partial)@sizeof\(void *\)" "^$" \
 681             "collect derived_whole" "^$" \
 682             \
 683             "collect virtual_partial.z" "^$"
 684
 685         # Begin the test.
 686         run_trace_experiment globals_test_func
 687
 688         gdb_collect_globals_test_1
 689
 690         gdb_test "tfind none" \
 691             "#0  end .*" \
 692             "cease trace debugging"
 693
 694         set tracefile [standard_output_file ${testfile}]
 695         gdb_test "tsave ${tracefile}.globals.tfile" \
 696             "Trace data saved to file '${tracefile}.globals.tfile'\.\\r" \
 697             "tsave ${testfile}.globals.tfile"
 698         gdb_test "tsave -ctf ${tracefile}.globals.ctf" \
 699             "Trace data saved to directory '${tracefile}.globals.ctf'\.\\r" \
 700             "save ctf trace file"
 701
 702         foreach target_name ${trace_file_targets} {
 703             # Restart GDB and read the trace data in ${TARGET_NAME} target.
 704             gdb_exit
 705             gdb_start
 706             gdb_reinitialize_dir $srcdir/$subdir
 707             gdb_file_cmd $binfile
 708             gdb_test "target ${target_name} ${tracefile}.globals.${target_name}" ".*" \
 709                 "change to ${target_name} target"
 710
 711             with_test_prefix "${target_name}" {
 712                 gdb_test "tfind start" "#0  globals_test_func .*" \
 713                     "tfind test frame"
 714                 gdb_collect_globals_test_1
 715             }
 716         }
 717
 718     }
 719 }
 720
 721 proc gdb_trace_collection_test {} {
 722     gdb_collect_globals_test
 723     gdb_unavailable_registers_test
 724     gdb_unavailable_floats
 725
 726     gdb_collect_args_test
 727     gdb_collect_locals_test local_test_func "auto locals"
 728     gdb_collect_locals_test reglocal_test_func "register locals"
 729     gdb_collect_locals_test statlocal_test_func "static locals"
 730 }
 731
 732 runto_main
 733
 734 if { ![gdb_target_supports_trace] } then {
 735     unsupported "current target does not support trace"
 736     return 1
 737 }
 738
 739 set trace_file_targets [list "tfile"]
 740 gdb_test_multiple "target ctf" "" {
 741     -re "Undefined target command: \"ctf\"\.  Try \"help target\"\.\r\n$gdb_prompt $" {
 742     }
 743     -re "No CTF directory specified.*\r\n$gdb_prompt $" {
 744         lappend trace_file_targets "ctf"
 745     }
 746 }
 747
 748 # Body of test encased in a proc so we can return prematurely.
 749 gdb_trace_collection_test
 750
 751 # Finished!
 752 gdb_test "tfind none" ".*" ""