gdb/testsuite/gdb.base/watchpoint.exp

   1 # Copyright 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2007, 2008, 2009
   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 # This file was written by Fred Fish. (fnf@cygnus.com)
  18
  19 if $tracelevel then {
  20     strace $tracelevel
  21 }
  22
  23 set prms_id 0
  24 set bug_id 0
  25
  26 set testfile "watchpoint"
  27 set srcfile ${testfile}.c
  28 set binfile ${objdir}/${subdir}/${testfile}
  29
  30 set wp_set 1
  31
  32 if [get_compiler_info ${binfile}] {
  33     return -1
  34 }
  35
  36 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  37      untested watchpoint.exp
  38      return -1
  39 }
  40
  41 # Prepare for watchpoint tests by setting up two breakpoints and one
  42 # watchpoint.
  43 #
  44 # We use breakpoints at marker functions to get past all the startup code,
  45 # so we can get to the watchpoints in a reasonable amount of time from a
  46 # known starting point.
  47 #
  48 # For simplicity, so we always know how to reference specific breakpoints or
  49 # watchpoints by number, we expect a particular ordering and numbering of
  50 # each in the combined breakpoint/watchpoint table, as follows:
  51 #
  52 #       Number          What            Where
  53 #       1               Breakpoint      marker1()
  54 #       2               Breakpoint      marker2()
  55 #       3               Watchpoint      ival3
  56
  57 proc initialize {} {
  58     global gdb_prompt
  59     global hex
  60     global decimal
  61     global srcfile
  62     global wp_set
  63
  64     # Disable hardware watchpoints if necessary.
  65     if [target_info exists gdb,no_hardware_watchpoints] {
  66         gdb_test "set can-use-hw-watchpoints 0" "" ""
  67     }
  68
  69     if [gdb_test "break marker1" "Breakpoint 1 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker1" ] {
  70       return 0;
  71     }
  72
  73
  74     if [gdb_test "break marker2" "Breakpoint 2 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker2" ] {
  75       return 0;
  76     }
  77
  78
  79     if [gdb_test "info break" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*" "info break in watchpoint.exp" ] {
  80       return 0;
  81     }
  82
  83
  84     # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint
  85     # before running can cause the inferior to croak on HP-UX 11.0 for
  86     # reasons yet unknown, we've disabled the ability to set watches
  87     # without a running inferior.  Verify the restriction.
  88     #
  89     send_gdb "watch ival3\n"
  90     gdb_expect {
  91         -re ".*\[Ww\]atchpoint 3: ival3.*$gdb_prompt $" {
  92             pass "set watchpoint on ival3"
  93         }
  94         -re "warning: can't do that without a running program; try \"break main\", \"run\" first.*$gdb_prompt $" {
  95             pass "set watchpoint on ival3"
  96             set wp_set 0
  97             return 1
  98         }
  99         timeout {
 100             fail "(timeout) set watchpoint on ival3"
 101             return 0
 102         }
 103     }
 104
 105     # "info watch" is the same as "info break"
 106
 107     if [gdb_test "info watch" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n3\[ \]*.*watchpoint.*ival3" "watchpoint found in watchpoint/breakpoint table" ] {
 108       return 0;
 109     }
 110
 111
 112     # After installing the watchpoint, we disable it until we are ready
 113     # to use it.  This allows the test program to run at full speed until
 114     # we get to the first marker function.
 115
 116     if [gdb_test "disable 3" "disable 3\[\r\n\]+" "disable watchpoint" ] {
 117       return 0;
 118     }
 119
 120
 121     return 1
 122 }
 123
 124 #
 125 # Test simple watchpoint.
 126 #
 127
 128 proc test_simple_watchpoint {} {
 129     global gdb_prompt
 130     global hex
 131     global decimal
 132     global wp_set
 133
 134     # Ensure that the watchpoint is disabled when we startup.
 135
 136     if { $wp_set } {
 137         if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_simple_watchpoint" ] {
 138             return 0;
 139         }
 140     }
 141
 142
 143     # Run until we get to the first marker function.
 144
 145     gdb_run_cmd
 146     set timeout 600
 147     gdb_expect {
 148         -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
 149             pass "run to marker1 in test_simple_watchpoint"
 150         }
 151         -re ".*$gdb_prompt $" {
 152             fail "run to marker1 in test_simple_watchpoint"
 153             return
 154         }
 155         timeout {
 156             fail "run to marker1 in test_simple_watchpoint (timeout)"
 157             return
 158         }
 159     }
 160
 161     if { !$wp_set } {
 162         # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint
 163         # before running can cause the inferior to croak on HP-UX 11.0
 164         # for reasons yet unknown, we've disabled the ability to set
 165         # watches without a running inferior.  The following testpoints used
 166         # to be in [initialize].
 167         #
 168         send_gdb "watch ival3\n"
 169         gdb_expect {
 170             -re ".*\[Ww\]atchpoint 3: ival3\r\n$gdb_prompt $" {
 171                 pass "set watchpoint on ival3"
 172             }
 173             -re ".*$gdb_prompt $" { fail "set watchpoint on ival3"  }
 174             timeout { fail "set watchpoint on ival3 (timeout)"  }
 175         }
 176
 177         set wp_set 1
 178
 179         # "info watch" is the same as "info break"
 180
 181         send_gdb "info watch\n"
 182         gdb_expect {
 183             -re "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n3\[ \]*.*watchpoint.*ival3\r\n$gdb_prompt $" {
 184                 pass "watchpoint found in watchpoint/breakpoint table"
 185             }
 186             -re ".*$gdb_prompt $" {
 187                 fail "watchpoint found in watchpoint/breakpoint table"
 188             }
 189             timeout {
 190                fail "watchpoint found in watchpoint/breakpoint table"
 191             }
 192         }
 193
 194         # After installing the watchpoint, we disable it until we are ready
 195         # to use it.  This allows the test program to run at full speed until
 196         # we get to the first marker function.
 197
 198         send_gdb "disable 3\n"
 199         gdb_expect {
 200             -re "disable 3\[\r\n\]+$gdb_prompt $" { pass "disable watchpoint" }
 201             -re ".*$gdb_prompt $" { fail "disable watchpoint"  }
 202             timeout { fail "disable watchpoint (timeout)"  }
 203         }
 204     }
 205
 206     # After reaching the marker function, enable the watchpoint.
 207
 208     if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "enable watchpoint" ] {
 209       return ;
 210     }
 211
 212
 213     gdb_test "break func1" "Breakpoint.*at.*"
 214     gdb_test "set \$func1_breakpoint_number = \$bpnum" ""
 215
 216     gdb_test "continue" "Continuing.*Breakpoint \[0-9\]*, func1.*" \
 217         "continue to breakpoint at func1"
 218
 219     # Continue until the first change, from -1 to 0
 220
 221     send_gdb "cont\n"
 222     gdb_expect {
 223         -re "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*$gdb_prompt $" {
 224             pass "watchpoint hit, first time"
 225         }
 226         -re "Continuing.*Breakpoint.*func1.*$gdb_prompt $" {
 227             setup_xfail "m68*-*-*" 2597
 228             fail "thought it hit breakpoint at func1 twice"
 229             gdb_test "delete \$func1_breakpoint_number" ""
 230             gdb_test "continue" "\
 231 Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count;" \
 232                 "watchpoint hit, first time"
 233         }
 234         -re ".*$gdb_prompt $" { fail "watchpoint hit, first time" ; return }
 235         timeout { fail "watchpoint hit, first time (timeout)" ; return }
 236         eof { fail "watchpoint hit, first time (eof)" ; return }
 237     }
 238
 239     # Check that the hit count is reported correctly
 240     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 1 time.*" "Watchpoint hit count is 1"
 241
 242     gdb_test "delete \$func1_breakpoint_number" ""
 243
 244     # Continue until the next change, from 0 to 1.
 245     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit, second time"
 246
 247     # Check that the hit count is reported correctly
 248     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 2 times.*" "Watchpoint hit count is 2"
 249
 250     # Continue until the next change, from 1 to 2.
 251     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 1.*New value = 2.*ival3 = count; ival4 = count;.*" "watchpoint hit, third time"
 252
 253     # Check that the hit count is reported correctly
 254     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 3 times.*" "Watchpoint hit count is 3"
 255
 256     # Continue until the next change, from 2 to 3.
 257     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 2.*New value = 3.*ival3 = count; ival4 = count;.*" "watchpoint hit, fourth time"
 258
 259     # Check that the hit count is reported correctly
 260     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 4 times.*" "Watchpoint hit count is 4"
 261
 262     # Continue until the next change, from 3 to 4.
 263     # Note that this one is outside the loop.
 264
 265     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 3.*New value = 4.*ival3 = count; ival4 = count;.*" "watchpoint hit, fifth time"
 266
 267     # Check that the hit count is reported correctly
 268     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 5 times.*" "Watchpoint hit count is 5"
 269
 270     # Continue until we hit the finishing marker function.
 271     # Make sure we hit no more watchpoints.
 272
 273     gdb_test "cont" "Continuing.*Breakpoint.*marker2 \(\).*" \
 274         "continue to marker2"
 275
 276     # Disable the watchpoint so we run at full speed until we exit.
 277
 278     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "watchpoint disabled" ] {
 279       return ;
 280     }
 281
 282
 283     # Run until process exits.
 284
 285     if [target_info exists gdb,noresults] { return }
 286
 287     gdb_continue_to_end "continue to exit in test_simple_watchpoint"
 288 }
 289
 290 # Test disabling watchpoints.
 291
 292 proc test_disabling_watchpoints {} {
 293     global gdb_prompt
 294     global binfile
 295     global srcfile
 296     global decimal
 297     global hex
 298
 299     # "info watch" is the same as "info break"
 300     gdb_test "info watch" "\[0-9\]+\[ \]*breakpoint.*marker1.*\r\n\[0-9\]+\[ \]*breakpoint.*marker2.*\r\n\[0-9]+\[ \]*.*watchpoint.*ival3\r\n\.*\[0-9\]+ times.*" "watchpoints found in watchpoint/breakpoint table"
 301
 302     # Ensure that the watchpoint is disabled when we startup.
 303
 304     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_disabling_watchpoints" ] {
 305       return 0;
 306     }
 307
 308
 309     # Run until we get to the first marker function.
 310
 311     gdb_run_cmd
 312     set timeout 600
 313     gdb_expect {
 314         -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
 315             pass "run to marker1 in test_disabling_watchpoints"
 316         }
 317         -re ".*$gdb_prompt $" {
 318             fail "run to marker1 in test_disabling_watchpoints"
 319             return
 320         }
 321         timeout {
 322             fail "run to marker1 in test_disabling_watchpoints (timeout)"
 323             return
 324         }
 325     }
 326
 327     # After reaching the marker function, enable the watchpoint.
 328
 329     if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "watchpoint enabled" ] {
 330       return ;
 331     }
 332
 333
 334     # Continue until the first change, from -1 to 0
 335     # Don't check the old value, because on VxWorks the variable value
 336     # will not have been reinitialized.
 337     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = .*New value = 0.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, first time"
 338
 339     # Continue until the next change, from 0 to 1.
 340     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, second time"
 341
 342     # Disable the watchpoint but leave breakpoints
 343
 344     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint #2 in test_disabling_watchpoints" ] {
 345       return 0;
 346     }
 347
 348
 349     # Check watchpoint list, looking for the entry that confirms the
 350     # watchpoint is disabled.
 351     gdb_test "info watchpoints" "\[0-9]+\[ \]*.*watchpoint\[ \]*keep\[ \]*n\[ \]*ival3\r\n.*" "watchpoint disabled in table"
 352
 353     # Continue until we hit the finishing marker function.
 354     # Make sure we hit no more watchpoints.
 355     gdb_test "cont" "Continuing.*Breakpoint.*marker2 \\(\\).*" \
 356         "disabled watchpoint skipped"
 357
 358     if [target_info exists gdb,noresults] { return }
 359
 360     gdb_continue_to_end "continue to exit in test_disabling_watchpoints"
 361 }
 362
 363 # Test stepping and other mundane operations with watchpoints enabled
 364 proc test_stepping {} {
 365     global gdb_prompt
 366
 367     if [runto marker1] then {
 368         gdb_test "watch ival2" ".*\[Ww\]atchpoint \[0-9\]*: ival2"
 369
 370         # Well, let's not be too mundane.  It should be a *bit* of a challenge
 371         gdb_test "break func2 if 0" "Breakpoint.*at.*"
 372         gdb_test "p \$func2_breakpoint_number = \$bpnum" " = .*"
 373
 374         gdb_test "p func1 ()" "= 73" \
 375             "calling function with watchpoint enabled"
 376
 377         #
 378         # "finish" brings us back to main.
 379         # On some targets (e.g. alpha) gdb will stop from the finish in midline
 380         # of the marker1 call. This is due to register restoring code on
 381         # the alpha and might be caused by stack adjustment instructions
 382         # on other targets. In this case we will step once more.
 383         #
 384
 385         send_gdb "finish\n"
 386         gdb_expect {
 387             -re "Run.*exit from.*marker1.* at" {
 388                 pass "finish from marker1"
 389             }
 390             default { fail "finish from marker1 (timeout)" ; return }
 391         }
 392
 393         gdb_expect {
 394             -re "marker1 \\(\\);.*$gdb_prompt $" {
 395                 send_gdb "step\n"
 396                 exp_continue
 397             }
 398             -re "func1 \\(\\);.*$gdb_prompt $" {
 399                 pass "back at main from marker1"
 400             }
 401             -re ".*$gdb_prompt $" {
 402                 fail "back at main from marker1"
 403             }
 404             default { fail "back at main from marker1 (timeout)" ; return }
 405         }
 406
 407         gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp"
 408
 409         # Now test that "until" works.  It's a bit tricky to test
 410         # "until", because compilers don't always arrange the code
 411         # exactly the same way, and we might get slightly different
 412         # sequences of statements.  But the following should be true
 413         # (if not it is a compiler or a debugger bug): The user who
 414         # does "until" at every statement of a loop should end up
 415         # stepping through the loop once, and the debugger should not
 416         # stop for any of the remaining iterations.
 417
 418         gdb_test "until" "ival1 = count.*" "until to ival1 assignment"
 419         gdb_test "until" "ival3 = count.*" "until to ival3 assignment"
 420         send_gdb "until\n"
 421         gdb_expect {
 422             -re "(for \\(count = 0|\}).*$gdb_prompt $" {
 423                 gdb_test "until" "ival1 = count; /. Outside loop ./" \
 424                     "until out of loop"
 425             }
 426             -re "ival1 = count; /. Outside loop ./.*$gdb_prompt $" {
 427                 pass "until out of loop"
 428             }
 429             -re ".*$gdb_prompt $" {
 430                 fail "until out of loop"
 431             }
 432             default { fail "until out of loop (timeout)" ; return }
 433         }
 434
 435         gdb_test "step" "ival2 = count.*" "step to ival2 assignment"
 436     }
 437 }
 438
 439 # Test stepping and other mundane operations with watchpoints enabled
 440 proc test_watchpoint_triggered_in_syscall {} {
 441     global gdb_prompt
 442
 443     # These tests won't work without printf support.
 444     if [gdb_skip_stdio_test "watchpoints triggered in syscall"] {
 445         return;
 446     }
 447     # Run until we get to the first marker function.
 448     set x 0
 449     set y 0
 450     set testname "Watch buffer passed to read syscall"
 451     if [runto marker2] then {
 452         gdb_test "watch buf\[0\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[0\\\]"
 453         gdb_test "watch buf\[1\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[1\\\]"
 454         gdb_test "watch buf\[2\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[2\\\]"
 455         gdb_test "watch buf\[3\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[3\\\]"
 456         gdb_test "watch buf\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]"
 457         gdb_test "break marker4" ".*Breakpoint.*"
 458
 459         gdb_test "set doread = 1" ""
 460
 461         # If we send_gdb "123\n" before gdb has switched the tty, then it goes
 462         # to gdb, not the inferior, and we lose.  So that is why we have
 463         # watchpoint.c prompt us, so we can wait for that prompt.
 464         send_gdb "continue\n";
 465         gdb_expect {
 466             -re "Continuing\\.\r\ntype stuff for buf now:" {
 467                 pass "continue to read"
 468             }
 469             default {
 470                 fail "continue to read";
 471                 return ;
 472             }
 473         }
 474
 475         send_gdb "123\n"
 476         gdb_expect {
 477             -re ".*\[Ww\]atchpoint.*buf\\\[0\\\].*Old value = 0.*New value = 49\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 478             -re ".*\[Ww\]atchpoint.*buf\\\[1\\\].*Old value = 0.*New value = 50\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 479             -re ".*\[Ww\]atchpoint.*buf\\\[2\\\].*Old value = 0.*New value = 51\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 480             -re ".*\[Ww\]atchpoint.*buf\\\[3\\\].*Old value = 0.*New value = 10\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 481             -re ".*$gdb_prompt $" { pass "sent 123" }
 482             timeout { fail "sent 123 (timeout)" }
 483         }
 484
 485         # Examine the values in buf to see how many watchpoints we
 486         # should have printed.
 487         send_gdb "print buf\[0\]\n"
 488         gdb_expect {
 489             -re ".*= 49.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[0\]"}
 490             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[0\]"}
 491             -re ".*$gdb_prompt $" { fail "print buf\[0\]"}
 492             default { fail "print buf\[0\]"}
 493         }
 494         send_gdb "print buf\[1\]\n"
 495         gdb_expect {
 496             -re ".*= 50.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[1\]"}
 497             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[1\]"}
 498             -re ".*$gdb_prompt $" { fail "print buf\[1\]"}
 499             default { fail "print buf\[1\]"}
 500         }
 501         send_gdb "print buf\[2\]\n"
 502         gdb_expect {
 503             -re ".*= 51.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[2\]"}
 504             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[2\]"}
 505             -re ".*$gdb_prompt $" { fail "print buf\[2\]"}
 506             default { fail "print buf\[2\]"}
 507         }
 508         send_gdb "print buf\[3\]\n"
 509         gdb_expect {
 510             -re ".*= 10.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[3\]"}
 511             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[3\]"}
 512             -re ".*$gdb_prompt $" { fail "print buf\[3\]" }
 513             default { fail "print buf\[3\]" }
 514         }
 515
 516         # Did we find what we were looking for?  If not, flunk it.
 517         if [expr $x==$y] then { pass $testname } else { fail "$testname (only triggered $x watchpoints, expected $y)"}
 518
 519         # Continue until we hit the finishing marker function.
 520         # Make sure we hit no more watchpoints.
 521         gdb_test "cont" "Continuing.*Breakpoint.*marker4 \\(\\).*" \
 522             "continue to marker4"
 523
 524         # Disable everything so we can finish the program at full speed
 525         gdb_test "disable" "" "disable in test_watchpoint_triggered_in_syscall"
 526
 527         if [target_info exists gdb,noresults] { return }
 528
 529         gdb_continue_to_end "continue to exit in test_watchpoint_triggered_in_syscall"
 530     }
 531 }
 532
 533 # Do a simple test of of watching through a pointer when the pointer
 534 # itself changes.  Should add some more complicated stuff here.
 535
 536 proc test_complex_watchpoint {} {
 537     global gdb_prompt
 538
 539     if [runto marker4] then {
 540         gdb_test "watch ptr1->val" ".*\[Ww\]atchpoint \[0-9\]*: ptr1->val"
 541         gdb_test "break marker5" ".*Breakpoint.*"
 542
 543         gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ptr1->val.*Old value = 1.*New value = 2.*" "Test complex watchpoint"
 544
 545         # Continue until we hit the marker5 function.
 546         # Make sure we hit no more watchpoints.
 547
 548         gdb_test "cont" "Continuing.*Breakpoint.*marker5 \\(\\).*" \
 549             "did not trigger wrong watchpoint"
 550
 551         # Test watches of things declared locally in a function.
 552         # In particular, test that a watch of stack-based things
 553         # is deleted when the stack-based things go out of scope.
 554         #
 555         gdb_test "disable" "" "disable in test_complex_watchpoint"
 556         gdb_test "break marker6" ".*Breakpoint.*"
 557         gdb_test "cont" "Continuing.*Breakpoint.*marker6 \\(\\).*" \
 558             "continue to marker6"
 559         gdb_test "break func2" ".*Breakpoint.*"
 560         gdb_test "cont" "Continuing.*func2.*"
 561
 562         # Test a watch of a single stack-based variable, whose scope
 563         # is the function we're now in.  This should auto-delete when
 564         # execution exits the scope of the watchpoint.
 565         #
 566         gdb_test "watch local_a" ".*\[Ww\]atchpoint \[0-9\]*: local_a" "set local watch"
 567         gdb_test "cont" "\[Ww\]atchpoint.*local_a.*" "trigger local watch"
 568         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" "self-delete local watch"
 569
 570         gdb_test "cont" "Continuing.*func2.*"
 571         # We should be in "func2" again now.  Test a watch of an
 572         # expression which includes both a stack-based local and
 573         # something whose scope is larger than this invocation
 574         # of "func2".  This should also auto-delete.
 575         #
 576         gdb_test "watch local_a + ival5" ".*\[Ww\]atchpoint \[0-9\]*: local_a . ival5" \
 577                  "set partially local watch"
 578         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
 579                  "trigger1 partially local watch"
 580         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
 581                  "trigger2 partially local watch"
 582         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 583                  "self-delete partially local watch"
 584
 585         # We should be in "func2" again now.  Test a watch of a
 586         # static (non-stack-based) local.  Since this has scope
 587         # across any invocations of "func2", it should not auto-
 588         # delete.
 589         #
 590         gdb_test "cont" "Continuing.*func2.*"
 591         gdb_test "watch static_b" ".*\[Ww\]atchpoint \[0-9\]*: static_b" \
 592                  "set static local watch"
 593         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: static_b.*" \
 594                  "trigger static local watch"
 595         gdb_test "cont" "Continuing.*marker6 \\(\\).*" \
 596                  "continue after trigger static local watch"
 597         gdb_test "info break" ".*watchpoint.*static_b.*" \
 598                  "static local watch did not self-delete"
 599
 600         # We should be in "recurser" now.  Test a watch of a stack-
 601         # based local.  Symbols mentioned in a watchpoint are bound
 602         # at watchpoint-creation.  Thus, a watch of a stack-based
 603         # local to a recursing function should be bound only to that
 604         # one invocation, and should not trigger for other invocations.
 605         #
 606         gdb_test "tbreak recurser" ".*breakpoint.*"
 607         gdb_test "cont" "Continuing.*recurser.*"
 608         gdb_test "watch local_x" ".*\[Ww\]atchpoint \[0-9\]*: local_x" \
 609                  "set local watch in recursive call"
 610         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_x.*New value = 2.*" \
 611                  "trigger local watch in recursive call"
 612         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 613                  "self-delete local watch in recursive call"
 614
 615         # Disable everything so we can finish the program at full speed
 616         gdb_test "disable" "" "disable in test_complex_watchpoint"
 617
 618         if [target_info exists gdb,noresults] { return }
 619
 620         gdb_continue_to_end "continue to exit in test_complex_watchpoint"
 621     }
 622 }
 623
 624 proc test_watchpoint_and_breakpoint {} {
 625     global gdb_prompt
 626
 627     # This is a test for PR gdb/38, which involves setting a
 628     # watchpoint right after you've reached a breakpoint.
 629
 630     if [runto func3] then {
 631         gdb_breakpoint [gdb_get_line_number "second x assignment"]
 632         gdb_continue_to_breakpoint "second x assignment"
 633         gdb_test "watch x" ".*atchpoint \[0-9\]+: x"
 634         gdb_test_multiple "next" "next after watch x" {
 635             -re ".*atchpoint \[0-9\]+: x\r\n\r\nOld value = 0\r\nNew value = 1\r\n.*$gdb_prompt $" {
 636                 pass "next after watch x"
 637             }
 638             -re "\[0-9\]+\[\t \]+y = 1;\r\n$gdb_prompt $" {
 639                 kfail "gdb/38" "next after watch x"
 640             }
 641         }
 642     }
 643 }
 644
 645 proc test_inaccessible_watchpoint {} {
 646     global gdb_prompt
 647
 648     # This is a test for watchpoints on currently inaccessible (but later
 649     # valid) memory.
 650
 651     if [runto func4] then {
 652         # Make sure we only allow memory access errors.
 653         set msg "watchpoint refused to insert on nonexistent struct member"
 654         gdb_test_multiple "watch struct1.nosuchmember" $msg {
 655             -re ".*atchpoint \[0-9\]+: struct1.nosuchmember.*$gdb_prompt $" {
 656                 # PR breakpoints/9681
 657                 fail $msg
 658             }
 659             -re "There is no member named nosuchmember\\..*$gdb_prompt $" {
 660                 pass $msg
 661             }
 662         }
 663
 664         gdb_test "watch *global_ptr" ".*atchpoint \[0-9\]+: \\*global_ptr"
 665         gdb_test "next" ".*global_ptr = buf.*"
 666         gdb_test_multiple "next" "next over ptr init" {
 667             -re ".*atchpoint \[0-9\]+: \\*global_ptr\r\n\r\nOld value = .*\r\nNew value = 3 .*\r\n.*$gdb_prompt $" {
 668                 # We can not test for <unknown> here because NULL may be readable.
 669                 # This test does rely on *NULL != 3.
 670                 pass "next over ptr init"
 671             }
 672         }
 673         gdb_test_multiple "next" "next over buffer set" {
 674             -re ".*atchpoint \[0-9\]+: \\*global_ptr\r\n\r\nOld value = 3 .*\r\nNew value = 7 .*\r\n.*$gdb_prompt $" {
 675                 pass "next over buffer set"
 676             }
 677         }
 678     }
 679 }
 680
 681 proc test_watchpoint_in_big_blob {} {
 682     global gdb_prompt
 683
 684     gdb_test "watch buf" ".*atchpoint \[0-9\]+: buf"
 685     gdb_test "cont" "Continuing.*atchpoint \[0-9\]+: buf\r\n\r\nOld value = .*testte\".*" "watchpoint on buf hit"
 686 }
 687
 688 # Start with a fresh gdb.
 689
 690 gdb_exit
 691 gdb_start
 692 gdb_reinitialize_dir $srcdir/$subdir
 693 gdb_load $binfile
 694 set prev_timeout $timeout
 695 set timeout 600
 696 verbose "Timeout now 600 sec.\n"
 697
 698 if [initialize] then {
 699
 700     test_simple_watchpoint
 701
 702     # The IDT/sim monitor only has 8 (!) open files, of which it uses
 703     # 4 (!).  So we have to make sure one program exits before
 704     # starting another one.
 705     if [istarget "mips-idt-*"] then {
 706         gdb_exit
 707         gdb_start
 708         gdb_reinitialize_dir $srcdir/$subdir
 709         gdb_load $binfile
 710         initialize
 711     }
 712
 713     test_disabling_watchpoints
 714
 715     # See above.
 716     if [istarget "mips-idt-*"] then {
 717         gdb_exit
 718         gdb_start
 719         gdb_reinitialize_dir $srcdir/$subdir
 720         gdb_load $binfile
 721         initialize
 722     }
 723
 724     if ![target_info exists gdb,cannot_call_functions] {
 725         test_stepping
 726
 727         # See above.
 728         if [istarget "mips-idt-*"] then {
 729             gdb_exit
 730             gdb_start
 731             gdb_reinitialize_dir $srcdir/$subdir
 732             gdb_load $binfile
 733             initialize
 734         }
 735     }
 736
 737     # Only enabled for some targets merely because it has not been tested
 738     # elsewhere.
 739     # On sparc-sun-sunos4.1.3, GDB was running all the way to the marker4
 740     # breakpoint before stopping for the watchpoint.  I don't know why.
 741     if {[istarget "hppa*-*-*"]} then {
 742         test_watchpoint_triggered_in_syscall
 743     }
 744
 745     # See above.
 746     if [istarget "mips-idt-*"] then {
 747         gdb_exit
 748         gdb_start
 749         gdb_reinitialize_dir $srcdir/$subdir
 750         gdb_load $binfile
 751         initialize
 752     }
 753
 754     # Only enabled for some targets merely because it has not been tested
 755     # elsewhere.
 756     if {[istarget "hppa*-*-*"] || \
 757             [istarget "sparc*-*-sunos*"] || \
 758             [istarget "m32r-*-*"]} then {
 759         test_complex_watchpoint
 760     }
 761
 762     # Verify that a user can force GDB to use "slow" watchpoints.
 763     # (This proves rather little on kernels that don't support
 764     # fast watchpoints, but still...)
 765     #
 766     if ![runto_main] then { fail "watch tests suppressed" }
 767
 768     send_gdb "set can-use-hw-watchpoints 0\n"
 769     gdb_expect {
 770       -re "$gdb_prompt $"\
 771               {pass "disable fast watches"}
 772       timeout {fail "(timeout) disable fast watches"}
 773     }
 774     send_gdb "show can-use-hw-watchpoints\n"
 775     gdb_expect {
 776       -re "Debugger's willingness to use watchpoint hardware is 0.*$gdb_prompt $"\
 777               {pass "show disable fast watches"}
 778       -re "$gdb_prompt $"\
 779               {fail "show disable fast watches"}
 780       timeout {fail "(timeout) show disable fast watches"}
 781     }
 782     send_gdb "watch ival3 if  count > 1\n"
 783     gdb_expect {
 784       -re "Watchpoint \[0-9\]*: ival3.*$gdb_prompt $"\
 785               {pass "set slow conditional watch"}
 786       -re "$gdb_prompt $"\
 787               {fail "set slow conditional watch"}
 788       timeout {fail "(timeout) set slow conditional watch"}
 789     }
 790     send_gdb "continue\n"
 791     gdb_expect {
 792       -re "Watchpoint \[0-9\]*: ival3.*Old value = 1.*New value = 2.*$gdb_prompt $"\
 793               {pass "trigger slow conditional watch"}
 794       -re "$gdb_prompt $"\
 795               {fail "trigger slow conditional watch"}
 796       timeout {fail "(timeout) trigger slow conditional watch"}
 797     }
 798
 799     # We've explicitly disabled hardware watches.  Verify that GDB
 800     # refrains from using them.
 801     #
 802     send_gdb "rwatch ival3\n"
 803     gdb_expect {
 804       -re "Expression cannot be implemented with read/access watchpoint..*$gdb_prompt $"\
 805               {pass "rwatch disallowed when can-set-hw-watchpoints cleared"}
 806       -re "$gdb_prompt $"\
 807               {fail "rwatch disallowed when can-set-hw-watchpoints cleared"}
 808       timeout {fail "(timeout) rwatch disallowed when can-use-hw-watchpoints cleared"}
 809     }
 810
 811     # Read- and access watchpoints are unsupported on HP-UX.  Verify
 812     # that GDB gracefully responds to requests to create them.
 813     #
 814     if [istarget "hppa*-*-hpux*"] then {
 815       send_gdb "set can-use-hw-watchpoints 1\n"
 816       gdb_expect {
 817         -re "$gdb_prompt $"\
 818                 {pass "enable fast watches"}
 819         timeout {fail "(timeout) enable fast watches"}
 820       }
 821       send_gdb "rwatch ival3\n"
 822       gdb_expect {
 823         -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\
 824                 {pass "read watches disallowed"}
 825         -re "$gdb_prompt $"\
 826                 {fail "read watches disallowed"}
 827         timeout {fail "(timeout) read watches disallowed"}
 828       }
 829
 830       send_gdb "awatch ival3\n"
 831       gdb_expect {
 832         -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\
 833                 {pass "access watches disallowed"}
 834         -re "$gdb_prompt $"\
 835                 {fail "access watches disallowed"}
 836         timeout {fail "(timeout) access watches disallowed"}
 837       }
 838     }
 839
 840     test_inaccessible_watchpoint
 841
 842     # See above.
 843     if [istarget "mips-idt-*"] then {
 844         gdb_exit
 845         gdb_start
 846         gdb_reinitialize_dir $srcdir/$subdir
 847         gdb_load $binfile
 848         initialize
 849     }
 850
 851     test_watchpoint_and_breakpoint
 852
 853     test_watchpoint_in_big_blob
 854 }
 855
 856 # Restore old timeout
 857 set timeout $prev_timeout
 858 verbose "Timeout now $timeout sec.\n"