gdb/testsuite/gdb.trace/collection.exp

   1 # Copyright 1998, 2005, 2007, 2008, 2009, 2010, 2011
   2 # 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 3 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, see <http://www.gnu.org/licenses/>.
  16
  17 load_lib "trace-support.exp"
  18
  19 if $tracelevel then {
  20         strace $tracelevel
  21 }
  22
  23
  24 set testfile "collection"
  25 set srcfile ${testfile}.c
  26 set executable $testfile
  27 set binfile $objdir/$subdir/$executable
  28
  29 if { [gdb_compile "$srcdir/$subdir/$srcfile" $binfile \
  30         executable {debug nowarnings}] != "" } {
  31     untested collection.exp
  32     return -1
  33 }
  34
  35 # Tests:
  36 # 1) $args
  37 # 2) function args by name
  38 # 3) $locs
  39 # 4) function locals by name
  40 # 5) $regs
  41 # 6) registers by name ($sp, $fp?)
  42 # 7) globals by name
  43 # 8) expressions (lots of different kinds: local and global)
  44
  45 set ws "\[\r\n\t \]+"
  46 set cr "\[\r\n\]+"
  47
  48 if [istarget "x86_64-*"] then {
  49     set fpreg "rbp"
  50     set spreg "rsp"
  51     set pcreg "rip"
  52 } elseif [istarget "i?86-*"] then {
  53     set fpreg "ebp"
  54     set spreg "esp"
  55     set pcreg "eip"
  56 } else {
  57     set fpreg "fp"
  58     set spreg "sp"
  59     set pcreg "pc"
  60 }
  61
  62 #
  63 # Utility procs
  64 #
  65
  66 proc test_register { reg test_id } {
  67     global cr
  68     global gdb_prompt
  69
  70     gdb_test_multiple "print /x $reg" "" {
  71         -re "\\$\[0-9\]+ = \[x0\]+$cr$gdb_prompt $" {
  72             fail "collect $test_id: collected $reg (zero)"
  73         }
  74         -re "\\$\[0-9\]+ = \[x0-9a-fA-F\]+$cr$gdb_prompt $" {
  75             pass "collect $test_id: collected $reg"
  76         }
  77         -re "\[Ee\]rror.*$gdb_prompt $" {
  78             fail "collect $test_id: collected $reg (error)"
  79         }
  80     }
  81 }
  82
  83 proc prepare_for_trace_test {} {
  84     global executable
  85
  86     clean_restart $executable
  87
  88     runto_main
  89
  90     gdb_test "break begin" ".*" ""
  91     gdb_test "break end" ".*" ""
  92 }
  93
  94 proc run_trace_experiment { msg test_func } {
  95     global gdb_prompt
  96
  97     gdb_test "continue" \
  98         ".*Breakpoint \[0-9\]+, begin .*" \
  99         "collect $msg: advance to begin"
 100
 101     set test "collect $msg: start trace experiment"
 102     gdb_test_multiple "tstart" "$test" {
 103         -re "^tstart\r\n$gdb_prompt $" {
 104             pass "$test"
 105         }
 106     }
 107
 108     gdb_test "continue" \
 109             "Continuing.*Breakpoint \[0-9\]+, end.*" \
 110             "collect $msg: run trace experiment"
 111     gdb_test "tstop" \
 112             "\[\r\n\]+" \
 113             "collect $msg: stop trace experiment"
 114     gdb_test "tfind start" \
 115             "#0  $test_func .*" \
 116             "collect $msg: tfind test frame"
 117 }
 118
 119
 120 #
 121 # Test procs
 122 #
 123
 124 proc gdb_collect_args_test { myargs msg } {
 125     global cr
 126     global gdb_prompt
 127
 128     prepare_for_trace_test
 129
 130     gdb_test "trace args_test_func" \
 131             "Tracepoint \[0-9\]+ at .*" \
 132             "collect $msg: set tracepoint"
 133     gdb_trace_setactions "collect $msg: define actions" \
 134             "" \
 135             "collect $myargs" "^$"
 136
 137     # Begin the test.
 138     run_trace_experiment $msg args_test_func
 139
 140     gdb_test "print argc" \
 141             "\\$\[0-9\]+ = 1 '.001'$cr" \
 142             "collect $msg: collected arg char"
 143     gdb_test "print argi" \
 144             "\\$\[0-9\]+ = 2$cr" \
 145             "collect $msg: collected arg int"
 146     gdb_test "print argf" \
 147             "\\$\[0-9\]+ = 3.\[23\]\[0-9\]*$cr" \
 148             "collect $msg: collected arg float"
 149     gdb_test "print argd" \
 150             "\\$\[0-9\]+ = 4.\[34\]\[0-9\]*$cr" \
 151             "collect $msg: collected arg double"
 152
 153     # struct arg as one of several args (near end of list)
 154     gdb_test "print argstruct.memberc" \
 155             "\\$\[0-9\]+ = 101 'e'$cr" \
 156             "collect $msg: collected arg struct member char"
 157     gdb_test "print argstruct.memberi" \
 158             "\\$\[0-9\]+ = 102$cr" \
 159             "collect $msg: collected arg struct member int"
 160     gdb_test "print argstruct.memberf" \
 161             "\\$\[0-9\]+ = 103.\[23\]\[0-9\]*$cr" \
 162             "collect $msg: collected arg struct member float"
 163     gdb_test "print argstruct.memberd" \
 164             "\\$\[0-9\]+ = 104.\[34\]\[0-9\]*$cr" \
 165             "collect $msg: collected arg struct member double"
 166
 167     # array arg as one of several args (near end of list)
 168
 169     # It isn't clear why is the test assuming the array's elements are
 170     # collected.  In C, an array as function parameters is a special
 171     # case; it's just a pointer into the caller's array, and as such,
 172     # that's what normally the debug info describes.  Maybe this was
 173     # originaly written for a compiler where array parameters were
 174     # really described as arrays in debug info.
 175
 176     setup_xfail "*-*-*"
 177     gdb_test "print argarray\[0\]" \
 178             "\\$\[0-9\]+ = 111$cr" \
 179             "collect $msg: collected argarray #0"
 180
 181     setup_xfail "*-*-*"
 182     gdb_test "print argarray\[1\]" \
 183             "\\$\[0-9\]+ = 112$cr" \
 184             "collect $msg: collected argarray #1"
 185
 186     setup_xfail "*-*-*"
 187     gdb_test "print argarray\[2\]" \
 188             "\\$\[0-9\]+ = 113$cr" \
 189             "collect $msg: collected argarray #2"
 190
 191     setup_xfail "*-*-*"
 192     gdb_test "print argarray\[3\]" \
 193             "\\$\[0-9\]+ = 114$cr" \
 194             "collect $msg: collected argarray #3"
 195
 196     gdb_test "tfind none" \
 197             "#0  end .*" \
 198             "collect $msg: cease trace debugging"
 199 }
 200
 201 proc gdb_collect_argstruct_test { myargs msg } {
 202     global cr
 203     global gdb_prompt
 204
 205     prepare_for_trace_test
 206
 207     gdb_test "trace argstruct_test_func" \
 208             "Tracepoint \[0-9\]+ at .*" \
 209             "collect $msg: set tracepoint"
 210     gdb_trace_setactions "collect $msg: define actions" \
 211             "" \
 212             "collect $myargs" "^$"
 213
 214     # Begin the test.
 215     run_trace_experiment $msg argstruct_test_func
 216
 217     # struct argument as only argument
 218     gdb_test "print argstruct.memberc" \
 219             "\\$\[0-9\]+ = 101 'e'$cr" \
 220             "collect $msg: collected arg struct member char"
 221     gdb_test "print argstruct.memberi" \
 222             "\\$\[0-9\]+ = 102$cr" \
 223             "collect $msg: collected arg struct member int"
 224     gdb_test "print argstruct.memberf" \
 225             "\\$\[0-9\]+ = 103.\[23\]\[0-9\]*$cr" \
 226             "collect $msg: collected arg struct member float"
 227     gdb_test "print argstruct.memberd" \
 228             "\\$\[0-9\]+ = 104.\[34\]\[0-9\]*$cr" \
 229             "collect $msg: collected arg struct member double"
 230
 231     gdb_test "tfind none" \
 232             "#0  end .*" \
 233             "collect $msg: cease trace debugging"
 234 }
 235
 236
 237 proc gdb_collect_argarray_test { myargs msg } {
 238     global cr
 239     global gdb_prompt
 240
 241     prepare_for_trace_test
 242
 243     gdb_test "trace argarray_test_func" \
 244             "Tracepoint \[0-9\]+ at .*" \
 245             "collect $msg: set tracepoint"
 246     gdb_trace_setactions "collect $msg: define actions" \
 247             "" \
 248             "collect $myargs" "^$"
 249
 250     # Begin the test.
 251     run_trace_experiment $msg argarray_test_func
 252
 253     # array arg as only argument
 254
 255     # It isn't clear why is the test assuming the array's elements are
 256     # collected.  In C, an array as function parameters is a special
 257     # case; it's just a pointer into the caller's array, and as such,
 258     # that's what normally the debug info describes.  Maybe this was
 259     # originaly written for a compiler where array parameters were
 260     # really described as arrays in debug info.
 261
 262     setup_xfail "*-*-*"
 263     gdb_test "print argarray\[0\]" \
 264             "\\$\[0-9\]+ = 111$cr" \
 265             "collect $msg: collected argarray #0"
 266
 267     setup_xfail "*-*-*"
 268     gdb_test "print argarray\[1\]" \
 269             "\\$\[0-9\]+ = 112$cr" \
 270             "collect $msg: collected argarray #1"
 271
 272     setup_xfail "*-*-*"
 273     gdb_test "print argarray\[2\]" \
 274             "\\$\[0-9\]+ = 113$cr" \
 275             "collect $msg: collected argarray #2"
 276
 277     setup_xfail "*-*-*"
 278     gdb_test "print argarray\[3\]" \
 279             "\\$\[0-9\]+ = 114$cr" \
 280             "collect $msg: collected argarray #3"
 281
 282     gdb_test "tfind none" \
 283             "#0  end .*" \
 284             "collect $msg: cease trace debugging"
 285 }
 286
 287
 288 proc gdb_collect_locals_test { func mylocs msg } {
 289     global cr
 290     global gdb_prompt
 291
 292     prepare_for_trace_test
 293
 294     # Find the comment-identified line for setting this tracepoint.
 295     set testline 0
 296     gdb_test_multiple "list $func, +30" "collect $msg: find tracepoint line" {
 297         -re "\[\r\n\](\[0-9\]+)\[^\r\n\]+ Set_Tracepoint_Here .*$gdb_prompt" {
 298             set testline $expect_out(1,string)
 299             pass "collect $msg: find tracepoint line"
 300         }
 301         -re ".*$gdb_prompt " {
 302             fail "collect $msg: find tracepoint line (skipping locals test)"
 303             return
 304         }
 305         timeout {
 306             fail "collect $msg: find tracepoint line (skipping locals test)"
 307             return
 308         }
 309     }
 310
 311     gdb_test "trace $testline" \
 312             "Tracepoint \[0-9\]+ at .*" \
 313             "collect $msg: set tracepoint"
 314     gdb_trace_setactions "collect $msg: define actions" \
 315             "" \
 316             "collect $mylocs" "^$"
 317
 318     # Begin the test.
 319     run_trace_experiment $msg $func
 320
 321     gdb_test "print locc" \
 322         "\\$\[0-9\]+ = 11 '.\[a-z0-7\]+'$cr" \
 323             "collect $msg: collected local char"
 324     gdb_test "print loci" \
 325             "\\$\[0-9\]+ = 12$cr" \
 326             "collect $msg: collected local int"
 327     gdb_test "print locf" \
 328             "\\$\[0-9\]+ = 13.\[23\]\[0-9\]*$cr" \
 329             "collect $msg: collected local float"
 330     gdb_test "print locd" \
 331             "\\$\[0-9\]+ = 14.\[34\]\[0-9\]*$cr" \
 332             "collect $msg: collected local double"
 333
 334     gdb_test "print locst.memberc" \
 335             "\\$\[0-9\]+ = 15 '.017'$cr" \
 336             "collect $msg: collected local member char"
 337     gdb_test "print locst.memberi" \
 338             "\\$\[0-9\]+ = 16$cr" \
 339             "collect $msg: collected local member int"
 340     gdb_test "print locst.memberf" \
 341             "\\$\[0-9\]+ = 17.\[67\]\[0-9\]*$cr" \
 342             "collect $msg: collected local member float"
 343     gdb_test "print locst.memberd" \
 344             "\\$\[0-9\]+ = 18.\[78\]\[0-9\]*$cr" \
 345             "collect $msg: collected local member double"
 346
 347     gdb_test "print locar\[0\]" \
 348             "\\$\[0-9\]+ = 121$cr" \
 349             "collect $msg: collected locarray #0"
 350     gdb_test "print locar\[1\]" \
 351             "\\$\[0-9\]+ = 122$cr" \
 352             "collect $msg: collected locarray #1"
 353     gdb_test "print locar\[2\]" \
 354             "\\$\[0-9\]+ = 123$cr" \
 355             "collect $msg: collected locarray #2"
 356     gdb_test "print locar\[3\]" \
 357             "\\$\[0-9\]+ = 124$cr" \
 358             "collect $msg: collected locarray #3"
 359
 360
 361     gdb_test "tfind none" \
 362             "#0  end .*" \
 363             "collect $msg: cease trace debugging"
 364 }
 365
 366 proc gdb_collect_registers_test { myregs } {
 367     global cr
 368     global gdb_prompt
 369     global fpreg
 370     global spreg
 371     global pcreg
 372
 373     prepare_for_trace_test
 374
 375     # We'll simply re-use the args_test_function for this test
 376     gdb_test "trace args_test_func" \
 377             "Tracepoint \[0-9\]+ at .*" \
 378             "collect $myregs: set tracepoint"
 379     gdb_trace_setactions "collect $myregs: define actions" \
 380             "" \
 381             "collect $myregs" "^$"
 382
 383     # Begin the test.
 384     run_trace_experiment $myregs args_test_func
 385
 386     test_register "\$$fpreg" $myregs
 387     test_register "\$$spreg" $myregs
 388     test_register "\$$pcreg" $myregs
 389
 390     gdb_test "tfind none" \
 391             "#0  end .*" \
 392             "collect $myregs: cease trace debugging"
 393 }
 394
 395 proc gdb_collect_expression_test { func expr val msg } {
 396     global cr
 397     global gdb_prompt
 398
 399     prepare_for_trace_test
 400
 401     # Find the comment-identified line for setting this tracepoint.
 402     set testline 0
 403     gdb_test_multiple "list $func, +30" "collect $msg: find tracepoint line" {
 404         -re "\[\r\n\](\[0-9\]+)\[^\r\n\]+ Set_Tracepoint_Here .*$gdb_prompt" {
 405             set testline $expect_out(1,string)
 406             pass "collect $msg: find tracepoint line"
 407         }
 408         -re ".*$gdb_prompt " {
 409             fail "collect $msg: find tracepoint line (skipping locals test)"
 410             return
 411         }
 412         timeout {
 413             fail "collect $msg: find tracepoint line (skipping locals test)"
 414             return
 415         }
 416     }
 417
 418     gdb_test "trace $testline" \
 419             "Tracepoint \[0-9\]+ at .*" \
 420             "collect $msg: set tracepoint"
 421     gdb_trace_setactions "collect $msg: define actions" \
 422             "" \
 423             "collect $expr" "^$"
 424
 425     # Begin the test.
 426     run_trace_experiment $msg $func
 427
 428     gdb_test "print $expr" \
 429             "\\$\[0-9\]+ = $val$cr" \
 430             "collect $msg: got expected value '$val'"
 431
 432     gdb_test "tfind none" \
 433             "#0  end .*" \
 434             "collect $msg: cease trace debugging"
 435 }
 436
 437 proc gdb_collect_globals_test { } {
 438     global cr
 439     global gdb_prompt
 440
 441     prepare_for_trace_test
 442
 443     # Find the comment-identified line for setting this tracepoint.
 444     set testline 0
 445     gdb_test_multiple "list globals_test_func, +30" "collect globals: find tracepoint line" {
 446         -re "\[\r\n\](\[0-9\]+)\[^\r\n\]+ Set_Tracepoint_Here .*$gdb_prompt" {
 447             set testline $expect_out(1,string)
 448             pass "collect globals: find tracepoint line"
 449         }
 450         -re ".*$gdb_prompt " {
 451             fail "collect globals: find tracepoint line (skipping global test)"
 452             return
 453         }
 454         timeout {
 455             fail "collect globals: find tracepoint line (skipping global test)"
 456             return
 457         }
 458     }
 459
 460     gdb_test "trace $testline" \
 461             "Tracepoint \[0-9\]+ at .*" \
 462             "collect globals: set tracepoint"
 463     gdb_trace_setactions "collect globals: define actions" \
 464             "" \
 465             "collect globalc, globali, globalf, globald" "^$" \
 466             "collect globalstruct, globalp, globalarr" "^$"
 467
 468     # Begin the test.
 469     run_trace_experiment "globals" globals_test_func
 470
 471     gdb_test "print globalc" \
 472             "\\$\[0-9\]+ = 71 'G'$cr" \
 473             "collect globals: collected global char"
 474     gdb_test "print globali" \
 475             "\\$\[0-9\]+ = 72$cr" \
 476             "collect globals: collected global int"
 477     gdb_test "print globalf" \
 478             "\\$\[0-9\]+ = 73.\[23\]\[0-9\]*$cr" \
 479             "collect globals: collected global float"
 480     gdb_test "print globald" \
 481             "\\$\[0-9\]+ = 74.\[34\]\[0-9\]*$cr" \
 482             "collect globals: collected global double"
 483
 484     gdb_test "print globalstruct.memberc" \
 485             "\\$\[0-9\]+ = 81 'Q'$cr" \
 486             "collect globals: collected struct char member"
 487     gdb_test "print globalstruct.memberi" \
 488             "\\$\[0-9\]+ = 82$cr" \
 489             "collect globals: collected struct member int"
 490     gdb_test "print globalstruct.memberf" \
 491             "\\$\[0-9\]+ = 83.\[23\]\[0-9\]*$cr" \
 492             "collect globals: collected struct member float"
 493     gdb_test "print globalstruct.memberd" \
 494             "\\$\[0-9\]+ = 84.\[34\]\[0-9\]*$cr" \
 495             "collect globals: collected struct member double"
 496
 497     gdb_test "print globalp == &globalstruct" \
 498             "\\$\[0-9\]+ = 1$cr" \
 499             "collect globals: collected global pointer"
 500
 501     gdb_test "print globalarr\[1\]" \
 502             "\\$\[0-9\]+ = 1$cr" \
 503             "collect globals: collected global array element #1"
 504     gdb_test "print globalarr\[2\]" \
 505             "\\$\[0-9\]+ = 2$cr" \
 506             "collect globals: collected global array element #2"
 507     gdb_test "print globalarr\[3\]" \
 508             "\\$\[0-9\]+ = 3$cr" \
 509             "collect globals: collected global array element #3"
 510
 511     gdb_test "tfind none" \
 512             "#0  end .*" \
 513             "collect globals: cease trace debugging"
 514 }
 515
 516 proc gdb_trace_collection_test {} {
 517     global fpreg
 518     global spreg
 519     global pcreg
 520
 521     gdb_collect_args_test "\$args" \
 522             "args collectively"
 523     gdb_collect_args_test "argc, argi, argf, argd, argstruct, argarray" \
 524             "args individually"
 525     gdb_collect_argstruct_test "\$args" \
 526             "argstruct collectively"
 527     gdb_collect_argstruct_test "argstruct" \
 528             "argstruct individually"
 529     gdb_collect_argarray_test "\$args" \
 530             "argarray collectively"
 531     gdb_collect_argarray_test "argarray" \
 532             "argarray individually"
 533     gdb_collect_locals_test local_test_func "\$locals" \
 534             "auto locals collectively"
 535     gdb_collect_locals_test local_test_func \
 536             "locc, loci, locf, locd, locst, locar" \
 537             "auto locals individually"
 538     gdb_collect_locals_test reglocal_test_func "\$locals" \
 539             "register locals collectively"
 540     gdb_collect_locals_test reglocal_test_func \
 541             "locc, loci, locf, locd, locst, locar" \
 542             "register locals individually"
 543     gdb_collect_locals_test statlocal_test_func "\$locals" \
 544             "static locals collectively"
 545     gdb_collect_locals_test statlocal_test_func \
 546             "locc, loci, locf, locd, locst, locar" \
 547             "static locals individually"
 548     gdb_collect_registers_test "\$regs"
 549     gdb_collect_registers_test "\$$fpreg, \$$spreg, \$$pcreg"
 550     gdb_collect_globals_test
 551
 552     #
 553     # Expression tests:
 554     #
 555     # *x        (**x, ...)
 556     # x.y       (x.y.z, ...)
 557     # x->y      (x->y->z, ...)
 558     # x[2]      (x[2][3], ...) (const index)
 559     # x[y]      (x[y][z], ...) (index to be char, short, long, float, double)
 560     #  NOTE:
 561     #  We test the following operators by using them in an array index
 562     #  expression -- because the naked result of an operator is not really
 563     #  collected.  To be sure the operator was evaluated correctly on the
 564     #  target, we have to actually use the result eg. in an array offset
 565     #  calculation.
 566     # x[y +  z] (tests addition: y and z various combos of types, sclasses)
 567     # x[y -  z] (tests subtraction) (ditto)
 568     # x[y *  z] (tests multiplication) (ditto)
 569     # x[y /  z] (tests division) (ditto)
 570     # x[y %  z] (tests modulo division) (ditto)
 571     # x[y == z] (tests equality relation) (ditto)              UNSUPPORTED
 572     # x[y != z] (tests inequality relation) (ditto)            UNSUPPORTED
 573     # x[y >  z] (tests greater-than relation) (ditto)          UNSUPPORTED
 574     # x[y <  z] (tests less-than relation) (ditto)             UNSUPPORTED
 575     # x[y >= z] (tests greater-than-or-equal relation) (ditto) UNSUPPORTED
 576     # x[y <= z] (tests less-than-or-equal relation) (ditto)    UNSUPPORTED
 577     # x[y && z] (tests logical and) (ditto)                    UNSUPPORTED
 578     # x[y || z] (tests logical or) (ditto)                     UNSUPPORTED
 579     # x[y &  z] (tests binary and) (ditto)                     UNSUPPORTED
 580     # x[y |  z] (tests binary or) (ditto)                      UNSUPPORTED
 581     # x[y ^  z] (tests binary xor) (ditto)                     UNSUPPORTED
 582     # x[y ? z1 : z2] (tests ternary operator) (ditto)          UNSUPPORTED
 583     # x[y << z] (tests shift-left) (ditto)                     UNSUPPORTED
 584     # x[y >> z] (tests shift-right) (ditto)                    UNSUPPORTED
 585     # x[y =  z] (tests assignment operator) (ditto)            UNSUPPORTED
 586     # x[++y]    (tests pre-increment operator) (ditto)         UNSUPPORTED
 587     # x[--y]    (tests pre-decrement operator) (ditto)         UNSUPPORTED
 588     # x[y++]    (tests post-increment operator) (ditto)        UNSUPPORTED
 589     # x[y--]    (tests post-decrement operator) (ditto)        UNSUPPORTED
 590     # x[+y]     (tests unary plus) (ditto)
 591     # x[-y]     (tests unary minus) (ditto)
 592     # x[!y]     (tests logical not) (ditto)                    UNSUPPORTED
 593     # x[~y]     (tests binary not) (ditto)                     UNSUPPORTED
 594     # x[(y, z)] (tests comma expression) (ditto)
 595     # cast expr
 596     # stack data
 597
 598     gdb_collect_expression_test globals_test_func \
 599             "globalstruct.memberi"  "82"     "a.b"
 600     gdb_collect_expression_test globals_test_func \
 601             "globalp->memberc"      "81 'Q'" "a->b"
 602     gdb_collect_expression_test globals_test_func \
 603             "globalarr\[2\]"        "2"      "a\[2\]"
 604     gdb_collect_expression_test globals_test_func \
 605             "globalarr\[l3\]"       "3"      "a\[b\]"
 606     gdb_collect_expression_test globals_test_func \
 607             "globalarr\[l3 + l2\]"  "5"      "a\[b + c\]"
 608     gdb_collect_expression_test globals_test_func \
 609             "globalarr\[l3 - l2\]"  "1"      "a\[b - c\]"
 610     gdb_collect_expression_test globals_test_func \
 611             "globalarr\[l3 * l2\]"  "6"      "a\[b * c\]"
 612     gdb_collect_expression_test globals_test_func \
 613             "globalarr\[l6 / l3\]"  "2"      "a\[b / c\]"
 614     gdb_collect_expression_test globals_test_func \
 615             "globalarr\[l7 % l3\]"  "1"      "a\[b % c\]"
 616     gdb_collect_expression_test globals_test_func \
 617             "globalarr\[+l1\]"      "1"      "a\[+b\]"
 618     gdb_collect_expression_test globals_test_func \
 619             "globalarr\[-lminus\]"  "2"      "a\[-b\]"
 620     gdb_collect_expression_test globals_test_func \
 621             "globalarr\[\(l6, l7\)\]" "7"    "a\[\(b, c\)\]"
 622
 623 }
 624
 625 clean_restart $executable
 626 runto_main
 627
 628 # We generously give ourselves one "pass" if we successfully
 629 # detect that this test cannot be run on this target!
 630 if { ![gdb_target_supports_trace] } then {
 631     pass "Current target does not support trace"
 632     return 1;
 633 }
 634
 635 # Body of test encased in a proc so we can return prematurely.
 636 gdb_trace_collection_test
 637
 638 # Finished!
 639 gdb_test "tfind none" ".*" ""