gdb/testsuite/gdb.base/watchpoint.exp

   1 # Copyright 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2007, 2008, 2009,
   2 # 2010 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
  24 set testfile "watchpoint"
  25 set srcfile ${testfile}.c
  26 set binfile ${objdir}/${subdir}/${testfile}
  27
  28 set wp_set 1
  29
  30 if [get_compiler_info ${binfile}] {
  31     return -1
  32 }
  33
  34 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  35      untested watchpoint.exp
  36      return -1
  37 }
  38
  39 # Prepare for watchpoint tests by setting up two breakpoints and one
  40 # watchpoint.
  41 #
  42 # We use breakpoints at marker functions to get past all the startup code,
  43 # so we can get to the watchpoints in a reasonable amount of time from a
  44 # known starting point.
  45 #
  46 # For simplicity, so we always know how to reference specific breakpoints or
  47 # watchpoints by number, we expect a particular ordering and numbering of
  48 # each in the combined breakpoint/watchpoint table, as follows:
  49 #
  50 #       Number          What            Where
  51 #       1               Breakpoint      marker1()
  52 #       2               Breakpoint      marker2()
  53 #       3               Watchpoint      ival3
  54
  55 proc initialize {} {
  56     global gdb_prompt
  57     global hex
  58     global decimal
  59     global srcfile
  60     global wp_set
  61
  62     # Disable hardware watchpoints if necessary.
  63     if [target_info exists gdb,no_hardware_watchpoints] {
  64         gdb_test "set can-use-hw-watchpoints 0" "" ""
  65     }
  66
  67     if [gdb_test "break marker1" "Breakpoint 1 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker1" ] {
  68       return 0;
  69     }
  70
  71
  72     if [gdb_test "break marker2" "Breakpoint 2 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker2" ] {
  73       return 0;
  74     }
  75
  76
  77     if [gdb_test "info break" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*" "info break in watchpoint.exp" ] {
  78       return 0;
  79     }
  80
  81
  82     # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint
  83     # before running can cause the inferior to croak on HP-UX 11.0 for
  84     # reasons yet unknown, we've disabled the ability to set watches
  85     # without a running inferior.  Verify the restriction.
  86     #
  87     send_gdb "watch ival3\n"
  88     gdb_expect {
  89         -re ".*\[Ww\]atchpoint 3: ival3.*$gdb_prompt $" {
  90             pass "set watchpoint on ival3"
  91         }
  92         -re "warning: can't do that without a running program; try \"break main\", \"run\" first.*$gdb_prompt $" {
  93             pass "set watchpoint on ival3"
  94             set wp_set 0
  95             return 1
  96         }
  97         timeout {
  98             fail "(timeout) set watchpoint on ival3"
  99             return 0
 100         }
 101     }
 102
 103     if [gdb_test "info watch" "3\[ \]*.*watchpoint.*ival3" "watchpoint found in watchpoint/breakpoint table" ] {
 104       return 0;
 105     }
 106
 107
 108     # After installing the watchpoint, we disable it until we are ready
 109     # to use it.  This allows the test program to run at full speed until
 110     # we get to the first marker function.
 111
 112     if [gdb_test "disable 3" "disable 3\[\r\n\]+" "disable watchpoint" ] {
 113       return 0;
 114     }
 115
 116
 117     return 1
 118 }
 119
 120 #
 121 # Test simple watchpoint.
 122 #
 123
 124 proc test_simple_watchpoint {} {
 125     global gdb_prompt
 126     global hex
 127     global decimal
 128     global wp_set
 129
 130     # Ensure that the watchpoint is disabled when we startup.
 131
 132     if { $wp_set } {
 133         if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_simple_watchpoint" ] {
 134             return 0;
 135         }
 136     }
 137
 138
 139     # Run until we get to the first marker function.
 140
 141     gdb_run_cmd
 142     set timeout 600
 143     gdb_expect {
 144         -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
 145             pass "run to marker1 in test_simple_watchpoint"
 146         }
 147         -re ".*$gdb_prompt $" {
 148             fail "run to marker1 in test_simple_watchpoint"
 149             return
 150         }
 151         timeout {
 152             fail "run to marker1 in test_simple_watchpoint (timeout)"
 153             return
 154         }
 155     }
 156
 157     if { !$wp_set } {
 158         # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint
 159         # before running can cause the inferior to croak on HP-UX 11.0
 160         # for reasons yet unknown, we've disabled the ability to set
 161         # watches without a running inferior.  The following testpoints used
 162         # to be in [initialize].
 163         #
 164         send_gdb "watch ival3\n"
 165         gdb_expect {
 166             -re ".*\[Ww\]atchpoint 3: ival3\r\n$gdb_prompt $" {
 167                 pass "set watchpoint on ival3"
 168             }
 169             -re ".*$gdb_prompt $" { fail "set watchpoint on ival3"  }
 170             timeout { fail "set watchpoint on ival3 (timeout)"  }
 171         }
 172
 173         set wp_set 1
 174
 175         send_gdb "info watch\n"
 176         gdb_expect {
 177             -re "3\[ \]*.*watchpoint.*ival3\r\n$gdb_prompt $" {
 178                 pass "watchpoint found in watchpoint/breakpoint table"
 179             }
 180             -re ".*$gdb_prompt $" {
 181                 fail "watchpoint found in watchpoint/breakpoint table"
 182             }
 183             timeout {
 184                fail "watchpoint found in watchpoint/breakpoint table"
 185             }
 186         }
 187
 188         # After installing the watchpoint, we disable it until we are ready
 189         # to use it.  This allows the test program to run at full speed until
 190         # we get to the first marker function.
 191
 192         send_gdb "disable 3\n"
 193         gdb_expect {
 194             -re "disable 3\[\r\n\]+$gdb_prompt $" { pass "disable watchpoint" }
 195             -re ".*$gdb_prompt $" { fail "disable watchpoint"  }
 196             timeout { fail "disable watchpoint (timeout)"  }
 197         }
 198     }
 199
 200     # After reaching the marker function, enable the watchpoint.
 201
 202     if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "enable watchpoint" ] {
 203       return ;
 204     }
 205
 206
 207     gdb_test "break func1" "Breakpoint.*at.*"
 208     gdb_test "set \$func1_breakpoint_number = \$bpnum" ""
 209
 210     gdb_test "continue" "Continuing.*Breakpoint \[0-9\]*, func1.*" \
 211         "continue to breakpoint at func1"
 212
 213     # Continue until the first change, from -1 to 0
 214
 215     send_gdb "cont\n"
 216     gdb_expect {
 217         -re "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*$gdb_prompt $" {
 218             pass "watchpoint hit, first time"
 219         }
 220         -re "Continuing.*Breakpoint.*func1.*$gdb_prompt $" {
 221             setup_xfail "m68*-*-*" 2597
 222             fail "thought it hit breakpoint at func1 twice"
 223             gdb_test "delete \$func1_breakpoint_number" ""
 224             gdb_test "continue" "\
 225 Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count;" \
 226                 "watchpoint hit, first time"
 227         }
 228         -re ".*$gdb_prompt $" { fail "watchpoint hit, first time" ; return }
 229         timeout { fail "watchpoint hit, first time (timeout)" ; return }
 230         eof { fail "watchpoint hit, first time (eof)" ; return }
 231     }
 232
 233     # Check that the hit count is reported correctly
 234     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 1 time.*" "Watchpoint hit count is 1"
 235
 236     gdb_test "delete \$func1_breakpoint_number" ""
 237
 238     # Continue until the next change, from 0 to 1.
 239     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit, second time"
 240
 241     # Check that the hit count is reported correctly
 242     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 2 times.*" "Watchpoint hit count is 2"
 243
 244     # Continue until the next change, from 1 to 2.
 245     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 1.*New value = 2.*ival3 = count; ival4 = count;.*" "watchpoint hit, third 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 3 times.*" "Watchpoint hit count is 3"
 249
 250     # Continue until the next change, from 2 to 3.
 251     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 2.*New value = 3.*ival3 = count; ival4 = count;.*" "watchpoint hit, fourth 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 4 times.*" "Watchpoint hit count is 4"
 255
 256     # Continue until the next change, from 3 to 4.
 257     # Note that this one is outside the loop.
 258
 259     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 3.*New value = 4.*ival3 = count; ival4 = count;.*" "watchpoint hit, fifth time"
 260
 261     # Check that the hit count is reported correctly
 262     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 5 times.*" "Watchpoint hit count is 5"
 263
 264     # Continue until we hit the finishing marker function.
 265     # Make sure we hit no more watchpoints.
 266
 267     gdb_test "cont" "Continuing.*Breakpoint.*marker2 \(\).*" \
 268         "continue to marker2"
 269
 270     # Disable the watchpoint so we run at full speed until we exit.
 271
 272     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "watchpoint disabled" ] {
 273       return ;
 274     }
 275
 276
 277     # Run until process exits.
 278
 279     if [target_info exists gdb,noresults] { return }
 280
 281     gdb_continue_to_end "continue to exit in test_simple_watchpoint"
 282 }
 283
 284 # Test disabling watchpoints.
 285
 286 proc test_disabling_watchpoints {} {
 287     global gdb_prompt
 288     global binfile
 289     global srcfile
 290     global decimal
 291     global hex
 292
 293     # "info watch" is the same as "info break"
 294     gdb_test "info watch" "\[0-9]+\[ \]*.*watchpoint.*ival3\r\n\.*\[0-9\]+ times.*" "watchpoints found in watchpoint/breakpoint table"
 295
 296     # Ensure that the watchpoint is disabled when we startup.
 297
 298     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_disabling_watchpoints" ] {
 299       return 0;
 300     }
 301
 302
 303     # Run until we get to the first marker function.
 304
 305     gdb_run_cmd
 306     set timeout 600
 307     gdb_expect {
 308         -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
 309             pass "run to marker1 in test_disabling_watchpoints"
 310         }
 311         -re ".*$gdb_prompt $" {
 312             fail "run to marker1 in test_disabling_watchpoints"
 313             return
 314         }
 315         timeout {
 316             fail "run to marker1 in test_disabling_watchpoints (timeout)"
 317             return
 318         }
 319     }
 320
 321     # After reaching the marker function, enable the watchpoint.
 322
 323     if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "watchpoint enabled" ] {
 324       return ;
 325     }
 326
 327
 328     # Continue until the first change, from -1 to 0
 329     # Don't check the old value, because on VxWorks the variable value
 330     # will not have been reinitialized.
 331     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = .*New value = 0.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, first time"
 332
 333     # Continue until the next change, from 0 to 1.
 334     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"
 335
 336     # Disable the watchpoint but leave breakpoints
 337
 338     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint #2 in test_disabling_watchpoints" ] {
 339       return 0;
 340     }
 341
 342
 343     # Check watchpoint list, looking for the entry that confirms the
 344     # watchpoint is disabled.
 345     gdb_test "info watchpoints" "\[0-9]+\[ \]*.*watchpoint\[ \]*keep\[ \]*n\[ \]*ival3\r\n.*" "watchpoint disabled in table"
 346
 347     # Continue until we hit the finishing marker function.
 348     # Make sure we hit no more watchpoints.
 349     gdb_test "cont" "Continuing.*Breakpoint.*marker2 \\(\\).*" \
 350         "disabled watchpoint skipped"
 351
 352     if [target_info exists gdb,noresults] { return }
 353
 354     gdb_continue_to_end "continue to exit in test_disabling_watchpoints"
 355 }
 356
 357 # Test stepping and other mundane operations with watchpoints enabled
 358 proc test_stepping {} {
 359     global gdb_prompt
 360
 361     if [runto marker1] then {
 362         gdb_test "watch ival2" ".*\[Ww\]atchpoint \[0-9\]*: ival2"
 363
 364         # Well, let's not be too mundane.  It should be a *bit* of a challenge
 365         gdb_test "break func2 if 0" "Breakpoint.*at.*"
 366         gdb_test "p \$func2_breakpoint_number = \$bpnum" " = .*"
 367
 368         gdb_test "p func1 ()" "= 73" \
 369             "calling function with watchpoint enabled"
 370
 371         #
 372         # "finish" brings us back to main.
 373         # On some targets (e.g. alpha) gdb will stop from the finish in midline
 374         # of the marker1 call. This is due to register restoring code on
 375         # the alpha and might be caused by stack adjustment instructions
 376         # on other targets. In this case we will step once more.
 377         #
 378
 379         send_gdb "finish\n"
 380         gdb_expect {
 381             -re "Run.*exit from.*marker1.* at" {
 382                 pass "finish from marker1"
 383             }
 384             default { fail "finish from marker1 (timeout)" ; return }
 385         }
 386
 387         gdb_expect {
 388             -re "marker1 \\(\\);.*$gdb_prompt $" {
 389                 send_gdb "step\n"
 390                 exp_continue
 391             }
 392             -re "func1 \\(\\);.*$gdb_prompt $" {
 393                 pass "back at main from marker1"
 394             }
 395             -re ".*$gdb_prompt $" {
 396                 fail "back at main from marker1"
 397             }
 398             default { fail "back at main from marker1 (timeout)" ; return }
 399         }
 400
 401         gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp"
 402
 403         # Now test that "until" works.  It's a bit tricky to test
 404         # "until", because compilers don't always arrange the code
 405         # exactly the same way, and we might get slightly different
 406         # sequences of statements.  But the following should be true
 407         # (if not it is a compiler or a debugger bug): The user who
 408         # does "until" at every statement of a loop should end up
 409         # stepping through the loop once, and the debugger should not
 410         # stop for any of the remaining iterations.
 411
 412         gdb_test "until" "ival1 = count.*" "until to ival1 assignment"
 413         gdb_test "until" "ival3 = count.*" "until to ival3 assignment"
 414         send_gdb "until\n"
 415         gdb_expect {
 416             -re "(for \\(count = 0|\}).*$gdb_prompt $" {
 417                 gdb_test "until" "ival1 = count; /. Outside loop ./" \
 418                     "until out of loop"
 419             }
 420             -re "ival1 = count; /. Outside loop ./.*$gdb_prompt $" {
 421                 pass "until out of loop"
 422             }
 423             -re ".*$gdb_prompt $" {
 424                 fail "until out of loop"
 425             }
 426             default { fail "until out of loop (timeout)" ; return }
 427         }
 428
 429         gdb_test "step" "ival2 = count.*" "step to ival2 assignment"
 430     }
 431 }
 432
 433 # Test stepping and other mundane operations with watchpoints enabled
 434 proc test_watchpoint_triggered_in_syscall {} {
 435     global gdb_prompt
 436
 437     # These tests won't work without printf support.
 438     if [gdb_skip_stdio_test "watchpoints triggered in syscall"] {
 439         return;
 440     }
 441     # Run until we get to the first marker function.
 442     set x 0
 443     set y 0
 444     set testname "Watch buffer passed to read syscall"
 445     if [runto marker2] then {
 446         gdb_test "watch buf\[0\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[0\\\]"
 447         gdb_test "watch buf\[1\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[1\\\]"
 448         gdb_test "watch buf\[2\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[2\\\]"
 449         gdb_test "watch buf\[3\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[3\\\]"
 450         gdb_test "watch buf\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]"
 451         gdb_test "break marker4" ".*Breakpoint.*"
 452
 453         gdb_test "set doread = 1" ""
 454
 455         # If we send_gdb "123\n" before gdb has switched the tty, then it goes
 456         # to gdb, not the inferior, and we lose.  So that is why we have
 457         # watchpoint.c prompt us, so we can wait for that prompt.
 458         send_gdb "continue\n";
 459         gdb_expect {
 460             -re "Continuing\\.\r\ntype stuff for buf now:" {
 461                 pass "continue to read"
 462             }
 463             default {
 464                 fail "continue to read";
 465                 return ;
 466             }
 467         }
 468
 469         send_gdb "123\n"
 470         gdb_expect {
 471             -re ".*\[Ww\]atchpoint.*buf\\\[0\\\].*Old value = 0.*New value = 49\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 472             -re ".*\[Ww\]atchpoint.*buf\\\[1\\\].*Old value = 0.*New value = 50\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 473             -re ".*\[Ww\]atchpoint.*buf\\\[2\\\].*Old value = 0.*New value = 51\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 474             -re ".*\[Ww\]atchpoint.*buf\\\[3\\\].*Old value = 0.*New value = 10\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 475             -re ".*$gdb_prompt $" { pass "sent 123" }
 476             timeout { fail "sent 123 (timeout)" }
 477         }
 478
 479         # Examine the values in buf to see how many watchpoints we
 480         # should have printed.
 481         send_gdb "print buf\[0\]\n"
 482         gdb_expect {
 483             -re ".*= 49.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[0\]"}
 484             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[0\]"}
 485             -re ".*$gdb_prompt $" { fail "print buf\[0\]"}
 486             default { fail "print buf\[0\]"}
 487         }
 488         send_gdb "print buf\[1\]\n"
 489         gdb_expect {
 490             -re ".*= 50.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[1\]"}
 491             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[1\]"}
 492             -re ".*$gdb_prompt $" { fail "print buf\[1\]"}
 493             default { fail "print buf\[1\]"}
 494         }
 495         send_gdb "print buf\[2\]\n"
 496         gdb_expect {
 497             -re ".*= 51.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[2\]"}
 498             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[2\]"}
 499             -re ".*$gdb_prompt $" { fail "print buf\[2\]"}
 500             default { fail "print buf\[2\]"}
 501         }
 502         send_gdb "print buf\[3\]\n"
 503         gdb_expect {
 504             -re ".*= 10.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[3\]"}
 505             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[3\]"}
 506             -re ".*$gdb_prompt $" { fail "print buf\[3\]" }
 507             default { fail "print buf\[3\]" }
 508         }
 509
 510         # Did we find what we were looking for?  If not, flunk it.
 511         if [expr $x==$y] then { pass $testname } else { fail "$testname (only triggered $x watchpoints, expected $y)"}
 512
 513         # Continue until we hit the finishing marker function.
 514         # Make sure we hit no more watchpoints.
 515         gdb_test "cont" "Continuing.*Breakpoint.*marker4 \\(\\).*" \
 516             "continue to marker4"
 517
 518         # Disable everything so we can finish the program at full speed
 519         gdb_test "disable" "" "disable in test_watchpoint_triggered_in_syscall"
 520
 521         if [target_info exists gdb,noresults] { return }
 522
 523         gdb_continue_to_end "continue to exit in test_watchpoint_triggered_in_syscall"
 524     }
 525 }
 526
 527 # Do a simple test of of watching through a pointer when the pointer
 528 # itself changes.  Should add some more complicated stuff here.
 529
 530 proc test_complex_watchpoint {} {
 531     global gdb_prompt
 532
 533     if [runto marker4] then {
 534         gdb_test "watch ptr1->val" ".*\[Ww\]atchpoint \[0-9\]*: ptr1->val"
 535         gdb_test "break marker5" ".*Breakpoint.*"
 536
 537         gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ptr1->val.*Old value = 1.*New value = 2.*" "Test complex watchpoint"
 538
 539         # Continue until we hit the marker5 function.
 540         # Make sure we hit no more watchpoints.
 541
 542         gdb_test "cont" "Continuing.*Breakpoint.*marker5 \\(\\).*" \
 543             "did not trigger wrong watchpoint"
 544
 545         # Test watches of things declared locally in a function.
 546         # In particular, test that a watch of stack-based things
 547         # is deleted when the stack-based things go out of scope.
 548         #
 549         gdb_test "disable" "" "disable in test_complex_watchpoint"
 550         gdb_test "break marker6" ".*Breakpoint.*"
 551         gdb_test "cont" "Continuing.*Breakpoint.*marker6 \\(\\).*" \
 552             "continue to marker6"
 553         gdb_test "break func2" ".*Breakpoint.*"
 554         gdb_test "cont" "Continuing.*func2.*"
 555
 556         # Test a watch of a single stack-based variable, whose scope
 557         # is the function we're now in.  This should auto-delete when
 558         # execution exits the scope of the watchpoint.
 559         #
 560         gdb_test "watch local_a" ".*\[Ww\]atchpoint \[0-9\]*: local_a" "set local watch"
 561         gdb_test "cont" "\[Ww\]atchpoint.*local_a.*" "trigger local watch"
 562         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" "self-delete local watch"
 563
 564         gdb_test "cont" "Continuing.*func2.*"
 565         # We should be in "func2" again now.  Test a watch of an
 566         # expression which includes both a stack-based local and
 567         # something whose scope is larger than this invocation
 568         # of "func2".  This should also auto-delete.
 569         #
 570         gdb_test "watch local_a + ival5" ".*\[Ww\]atchpoint \[0-9\]*: local_a . ival5" \
 571                  "set partially local watch"
 572         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
 573                  "trigger1 partially local watch"
 574         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
 575                  "trigger2 partially local watch"
 576         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 577                  "self-delete partially local watch"
 578
 579         # We should be in "func2" again now.  Test a watch of a
 580         # static (non-stack-based) local.  Since this has scope
 581         # across any invocations of "func2", it should not auto-
 582         # delete.
 583         #
 584         gdb_test "cont" "Continuing.*func2.*"
 585         gdb_test "watch static_b" ".*\[Ww\]atchpoint \[0-9\]*: static_b" \
 586                  "set static local watch"
 587         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: static_b.*" \
 588                  "trigger static local watch"
 589         gdb_test "cont" "Continuing.*marker6 \\(\\).*" \
 590                  "continue after trigger static local watch"
 591         gdb_test "info break" ".*watchpoint.*static_b.*" \
 592                  "static local watch did not self-delete"
 593
 594         # We should be in "recurser" now.  Test a watch of a stack-
 595         # based local.  Symbols mentioned in a watchpoint are bound
 596         # at watchpoint-creation.  Thus, a watch of a stack-based
 597         # local to a recursing function should be bound only to that
 598         # one invocation, and should not trigger for other invocations.
 599         #
 600         gdb_test "tbreak recurser" ".*breakpoint.*"
 601         gdb_test "cont" "Continuing.*recurser.*"
 602         gdb_test "watch local_x" ".*\[Ww\]atchpoint \[0-9\]*: local_x" \
 603                  "set local watch in recursive call"
 604         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_x.*New value = 2.*" \
 605                  "trigger local watch in recursive call"
 606         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 607                  "self-delete local watch in recursive call"
 608
 609         # Disable everything so we can finish the program at full speed
 610         gdb_test "disable" "" "disable in test_complex_watchpoint"
 611
 612         if [target_info exists gdb,noresults] { return }
 613
 614         gdb_continue_to_end "continue to exit in test_complex_watchpoint"
 615     }
 616 }
 617
 618 proc test_watchpoint_and_breakpoint {} {
 619     global gdb_prompt
 620
 621     # This is a test for PR gdb/38, which involves setting a
 622     # watchpoint right after you've reached a breakpoint.
 623
 624     if [runto func3] then {
 625         gdb_breakpoint [gdb_get_line_number "second x assignment"]
 626         gdb_continue_to_breakpoint "second x assignment"
 627         gdb_test "watch x" ".*atchpoint \[0-9\]+: x"
 628         gdb_test_multiple "next" "next after watch x" {
 629             -re ".*atchpoint \[0-9\]+: x\r\n\r\nOld value = 0\r\nNew value = 1\r\n.*$gdb_prompt $" {
 630                 pass "next after watch x"
 631             }
 632             -re "\[0-9\]+\[\t \]+y = 1;\r\n$gdb_prompt $" {
 633                 kfail "gdb/38" "next after watch x"
 634             }
 635         }
 636     }
 637 }
 638
 639 proc test_inaccessible_watchpoint {} {
 640     global gdb_prompt
 641
 642     # This is a test for watchpoints on currently inaccessible (but later
 643     # valid) memory.
 644
 645     if [runto func4] then {
 646         # Make sure we only allow memory access errors.
 647         set msg "watchpoint refused to insert on nonexistent struct member"
 648         gdb_test_multiple "watch struct1.nosuchmember" $msg {
 649             -re ".*atchpoint \[0-9\]+: struct1.nosuchmember.*$gdb_prompt $" {
 650                 # PR breakpoints/9681
 651                 fail $msg
 652             }
 653             -re "There is no member named nosuchmember\\..*$gdb_prompt $" {
 654                 pass $msg
 655             }
 656         }
 657
 658         gdb_test "watch *global_ptr" ".*atchpoint \[0-9\]+: \\*global_ptr"
 659         gdb_test "next" ".*global_ptr = buf.*"
 660         gdb_test_multiple "next" "next over ptr init" {
 661             -re ".*atchpoint \[0-9\]+: \\*global_ptr\r\n\r\nOld value = .*\r\nNew value = 3 .*\r\n.*$gdb_prompt $" {
 662                 # We can not test for <unknown> here because NULL may be readable.
 663                 # This test does rely on *NULL != 3.
 664                 pass "next over ptr init"
 665             }
 666         }
 667         gdb_test_multiple "next" "next over buffer set" {
 668             -re ".*atchpoint \[0-9\]+: \\*global_ptr\r\n\r\nOld value = 3 .*\r\nNew value = 7 .*\r\n.*$gdb_prompt $" {
 669                 pass "next over buffer set"
 670             }
 671         }
 672     }
 673 }
 674
 675 proc test_watchpoint_in_big_blob {} {
 676     global gdb_prompt
 677
 678     gdb_test "watch buf" ".*atchpoint \[0-9\]+: buf"
 679     gdb_test "cont" "Continuing.*atchpoint \[0-9\]+: buf\r\n\r\nOld value = .*testte\".*" "watchpoint on buf hit"
 680 }
 681
 682 # Start with a fresh gdb.
 683
 684 gdb_exit
 685 gdb_start
 686 gdb_reinitialize_dir $srcdir/$subdir
 687 gdb_load $binfile
 688 set prev_timeout $timeout
 689 set timeout 600
 690 verbose "Timeout now 600 sec.\n"
 691
 692 if [initialize] then {
 693
 694     test_simple_watchpoint
 695
 696     # The IDT/sim monitor only has 8 (!) open files, of which it uses
 697     # 4 (!).  So we have to make sure one program exits before
 698     # starting another one.
 699     if [istarget "mips-idt-*"] then {
 700         gdb_exit
 701         gdb_start
 702         gdb_reinitialize_dir $srcdir/$subdir
 703         gdb_load $binfile
 704         initialize
 705     }
 706
 707     test_disabling_watchpoints
 708
 709     # See above.
 710     if [istarget "mips-idt-*"] then {
 711         gdb_exit
 712         gdb_start
 713         gdb_reinitialize_dir $srcdir/$subdir
 714         gdb_load $binfile
 715         initialize
 716     }
 717
 718     if ![target_info exists gdb,cannot_call_functions] {
 719         test_stepping
 720
 721         # See above.
 722         if [istarget "mips-idt-*"] then {
 723             gdb_exit
 724             gdb_start
 725             gdb_reinitialize_dir $srcdir/$subdir
 726             gdb_load $binfile
 727             initialize
 728         }
 729     }
 730
 731     # Only enabled for some targets merely because it has not been tested
 732     # elsewhere.
 733     # On sparc-sun-sunos4.1.3, GDB was running all the way to the marker4
 734     # breakpoint before stopping for the watchpoint.  I don't know why.
 735     if {[istarget "hppa*-*-*"]} then {
 736         test_watchpoint_triggered_in_syscall
 737     }
 738
 739     # See above.
 740     if [istarget "mips-idt-*"] then {
 741         gdb_exit
 742         gdb_start
 743         gdb_reinitialize_dir $srcdir/$subdir
 744         gdb_load $binfile
 745         initialize
 746     }
 747
 748     # Only enabled for some targets merely because it has not been tested
 749     # elsewhere.
 750     if {[istarget "hppa*-*-*"] || \
 751             [istarget "sparc*-*-sunos*"] || \
 752             [istarget "m32r-*-*"]} then {
 753         test_complex_watchpoint
 754     }
 755
 756     # Verify that a user can force GDB to use "slow" watchpoints.
 757     # (This proves rather little on kernels that don't support
 758     # fast watchpoints, but still...)
 759     #
 760     if ![runto_main] then { fail "watch tests suppressed" }
 761
 762     send_gdb "set can-use-hw-watchpoints 0\n"
 763     gdb_expect {
 764       -re "$gdb_prompt $"\
 765               {pass "disable fast watches"}
 766       timeout {fail "(timeout) disable fast watches"}
 767     }
 768     send_gdb "show can-use-hw-watchpoints\n"
 769     gdb_expect {
 770       -re "Debugger's willingness to use watchpoint hardware is 0.*$gdb_prompt $"\
 771               {pass "show disable fast watches"}
 772       -re "$gdb_prompt $"\
 773               {fail "show disable fast watches"}
 774       timeout {fail "(timeout) show disable fast watches"}
 775     }
 776     send_gdb "watch ival3 if  count > 1\n"
 777     gdb_expect {
 778       -re "Watchpoint \[0-9\]*: ival3.*$gdb_prompt $"\
 779               {pass "set slow conditional watch"}
 780       -re "$gdb_prompt $"\
 781               {fail "set slow conditional watch"}
 782       timeout {fail "(timeout) set slow conditional watch"}
 783     }
 784     send_gdb "continue\n"
 785     gdb_expect {
 786       -re "Watchpoint \[0-9\]*: ival3.*Old value = 1.*New value = 2.*$gdb_prompt $"\
 787               {pass "trigger slow conditional watch"}
 788       -re "$gdb_prompt $"\
 789               {fail "trigger slow conditional watch"}
 790       timeout {fail "(timeout) trigger slow conditional watch"}
 791     }
 792
 793     # We've explicitly disabled hardware watches.  Verify that GDB
 794     # refrains from using them.
 795     #
 796     send_gdb "rwatch ival3\n"
 797     gdb_expect {
 798       -re "Expression cannot be implemented with read/access watchpoint..*$gdb_prompt $"\
 799               {pass "rwatch disallowed when can-set-hw-watchpoints cleared"}
 800       -re "$gdb_prompt $"\
 801               {fail "rwatch disallowed when can-set-hw-watchpoints cleared"}
 802       timeout {fail "(timeout) rwatch disallowed when can-use-hw-watchpoints cleared"}
 803     }
 804
 805     # Read- and access watchpoints are unsupported on HP-UX.  Verify
 806     # that GDB gracefully responds to requests to create them.
 807     #
 808     if [istarget "hppa*-*-hpux*"] then {
 809       send_gdb "set can-use-hw-watchpoints 1\n"
 810       gdb_expect {
 811         -re "$gdb_prompt $"\
 812                 {pass "enable fast watches"}
 813         timeout {fail "(timeout) enable fast watches"}
 814       }
 815       send_gdb "rwatch ival3\n"
 816       gdb_expect {
 817         -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\
 818                 {pass "read watches disallowed"}
 819         -re "$gdb_prompt $"\
 820                 {fail "read watches disallowed"}
 821         timeout {fail "(timeout) read watches disallowed"}
 822       }
 823
 824       send_gdb "awatch ival3\n"
 825       gdb_expect {
 826         -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\
 827                 {pass "access watches disallowed"}
 828         -re "$gdb_prompt $"\
 829                 {fail "access watches disallowed"}
 830         timeout {fail "(timeout) access watches disallowed"}
 831       }
 832     }
 833
 834     test_inaccessible_watchpoint
 835
 836     # See above.
 837     if [istarget "mips-idt-*"] then {
 838         gdb_exit
 839         gdb_start
 840         gdb_reinitialize_dir $srcdir/$subdir
 841         gdb_load $binfile
 842         initialize
 843     }
 844
 845     test_watchpoint_and_breakpoint
 846
 847     test_watchpoint_in_big_blob
 848 }
 849
 850 # Restore old timeout
 851 set timeout $prev_timeout
 852 verbose "Timeout now $timeout sec.\n"