gdb/testsuite/gdb.base/watchpoint.exp

   1 # Copyright 1992, 1994-2000, 2007-2012 Free Software Foundation, Inc.
   2
   3 # This program is free software; you can redistribute it and/or modify
   4 # it under the terms of the GNU General Public License as published by
   5 # the Free Software Foundation; either version 3 of the License, or
   6 # (at your option) any later version.
   7 #
   8 # This program is distributed in the hope that it will be useful,
   9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11 # GNU General Public License for more details.
  12 #
  13 # You should have received a copy of the GNU General Public License
  14 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15
  16 # This file was written by Fred Fish. (fnf@cygnus.com)
  17
  18
  19 set testfile "watchpoint"
  20 set srcfile ${testfile}.c
  21 set binfile ${objdir}/${subdir}/${testfile}
  22
  23 if [get_compiler_info ${binfile}] {
  24     return -1
  25 }
  26
  27 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  28      untested watchpoint.exp
  29      return -1
  30 }
  31
  32 # Prepare for watchpoint tests by setting up two breakpoints and one
  33 # watchpoint.
  34 #
  35 # We use breakpoints at marker functions to get past all the startup code,
  36 # so we can get to the watchpoints in a reasonable amount of time from a
  37 # known starting point.
  38 #
  39 # For simplicity, so we always know how to reference specific breakpoints or
  40 # watchpoints by number, we expect a particular ordering and numbering of
  41 # each in the combined breakpoint/watchpoint table, as follows:
  42 #
  43 #       Number          What            Where
  44 #       1               Breakpoint      marker1()
  45 #       2               Breakpoint      marker2()
  46 #       3               Watchpoint      ival3
  47
  48 proc initialize {} {
  49     global gdb_prompt
  50     global hex
  51     global decimal
  52     global srcfile
  53
  54     # Disable hardware watchpoints if necessary.
  55     if [target_info exists gdb,no_hardware_watchpoints] {
  56         gdb_test_no_output "set can-use-hw-watchpoints 0" ""
  57     }
  58
  59     if [gdb_test "break marker1" "Breakpoint 1 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker1" ] {
  60       return 0;
  61     }
  62
  63
  64     if [gdb_test "break marker2" "Breakpoint 2 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker2" ] {
  65       return 0;
  66     }
  67
  68
  69     if [gdb_test "info break" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*" "info break in watchpoint.exp" ] {
  70       return 0;
  71     }
  72
  73     gdb_test "watch ival3" ".*\[Ww\]atchpoint 3: ival3.*" "set watchpoint on ival3"
  74
  75     if [gdb_test "info watch" "3\[ \]*.*watchpoint.*ival3" "watchpoint found in watchpoint/breakpoint table" ] {
  76       return 0;
  77     }
  78
  79
  80     # After installing the watchpoint, we disable it until we are ready
  81     # to use it.  This allows the test program to run at full speed until
  82     # we get to the first marker function.
  83
  84     if [gdb_test "disable 3" "disable 3\[\r\n\]+" "disable watchpoint" ] {
  85       return 0;
  86     }
  87
  88
  89     return 1
  90 }
  91
  92 #
  93 # Test simple watchpoint.
  94 #
  95
  96 proc test_simple_watchpoint {} {
  97     global gdb_prompt
  98     global hex
  99     global decimal
 100
 101     # Ensure that the watchpoint is disabled when we startup.
 102
 103     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_simple_watchpoint" ] {
 104       return 0;
 105     }
 106
 107     # Run until we get to the first marker function.
 108
 109     gdb_run_cmd
 110     set timeout 600
 111     set test "run to marker1 in test_simple_watchpoint"
 112     set retcode [gdb_test_multiple "" $test {
 113         -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
 114             pass $test
 115         }
 116     }]
 117
 118     if { $retcode != 0 } {
 119         return
 120     }
 121
 122     # After reaching the marker function, enable the watchpoint.
 123
 124     if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "enable watchpoint" ] {
 125       return ;
 126     }
 127
 128
 129     gdb_test "break func1" "Breakpoint.*at.*"
 130     gdb_test_no_output "set \$func1_breakpoint_number = \$bpnum"
 131
 132     gdb_test "continue" "Continuing.*Breakpoint \[0-9\]*, func1.*" \
 133         "continue to breakpoint at func1"
 134
 135     # Continue until the first change, from -1 to 0
 136
 137     set test "watchpoint hit, first time"
 138     gdb_test_multiple "cont" $test {
 139         -re "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*$gdb_prompt $" {
 140             pass $test
 141         }
 142         -re "Continuing.*Breakpoint.*func1.*$gdb_prompt $" {
 143             setup_xfail "m68*-*-*" 2597
 144             fail "thought it hit breakpoint at func1 twice"
 145             gdb_test_no_output "delete \$func1_breakpoint_number"
 146             gdb_test "continue" "\
 147 Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count;" \
 148                 $test
 149         }
 150     }
 151
 152     # Check that the hit count is reported correctly
 153     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 1 time.*" "Watchpoint hit count is 1"
 154
 155     gdb_test_no_output "delete \$func1_breakpoint_number"
 156
 157     # Continue until the next change, from 0 to 1.
 158     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit, second time"
 159
 160     # Check that the hit count is reported correctly
 161     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 2 times.*" "Watchpoint hit count is 2"
 162
 163     # Continue until the next change, from 1 to 2.
 164     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 1.*New value = 2.*ival3 = count; ival4 = count;.*" "watchpoint hit, third time"
 165
 166     # Check that the hit count is reported correctly
 167     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 3 times.*" "Watchpoint hit count is 3"
 168
 169     # Continue until the next change, from 2 to 3.
 170     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 2.*New value = 3.*ival3 = count; ival4 = count;.*" "watchpoint hit, fourth time"
 171
 172     # Check that the hit count is reported correctly
 173     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 4 times.*" "Watchpoint hit count is 4"
 174
 175     # Continue until the next change, from 3 to 4.
 176     # Note that this one is outside the loop.
 177
 178     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 3.*New value = 4.*ival3 = count; ival4 = count;.*" "watchpoint hit, fifth time"
 179
 180     # Check that the hit count is reported correctly
 181     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 5 times.*" "Watchpoint hit count is 5"
 182
 183     # Continue until we hit the finishing marker function.
 184     # Make sure we hit no more watchpoints.
 185
 186     gdb_test "cont" "Continuing.*Breakpoint.*marker2 \(\).*" \
 187         "continue to marker2"
 188
 189     # Disable the watchpoint so we run at full speed until we exit.
 190
 191     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "watchpoint disabled" ] {
 192       return ;
 193     }
 194
 195
 196     # Run until process exits.
 197
 198     if [target_info exists gdb,noresults] { return }
 199
 200     gdb_continue_to_end "continue to exit in test_simple_watchpoint"
 201 }
 202
 203 # Test disabling watchpoints.
 204
 205 proc test_disabling_watchpoints {} {
 206     global gdb_prompt
 207     global binfile
 208     global srcfile
 209     global decimal
 210     global hex
 211
 212     # "info watch" is the same as "info break"
 213     gdb_test "info watch" "\[0-9]+\[ \]*.*watchpoint.*ival3\r\n\.*\[0-9\]+ times.*" "watchpoints found in watchpoint/breakpoint table"
 214
 215     # Ensure that the watchpoint is disabled when we startup.
 216
 217     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_disabling_watchpoints" ] {
 218       return 0;
 219     }
 220
 221
 222     # Run until we get to the first marker function.
 223
 224     gdb_run_cmd
 225     set timeout 600
 226     set test "run to marker1 in test_disabling_watchpoints"
 227     set retcode [gdb_test_multiple "" $test {
 228         -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
 229             pass $test
 230         }
 231     }]
 232
 233     if { $retcode != 0 } {
 234         return
 235     }
 236
 237     # After reaching the marker function, enable the watchpoint.
 238
 239     if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "watchpoint enabled" ] {
 240       return ;
 241     }
 242
 243
 244     # Continue until the first change, from -1 to 0
 245     # Don't check the old value, because on VxWorks the variable value
 246     # will not have been reinitialized.
 247     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = .*New value = 0.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, first time"
 248
 249     # Continue until the next change, from 0 to 1.
 250     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"
 251
 252     # Disable the watchpoint but leave breakpoints
 253
 254     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint #2 in test_disabling_watchpoints" ] {
 255       return 0;
 256     }
 257
 258
 259     # Check watchpoint list, looking for the entry that confirms the
 260     # watchpoint is disabled.
 261     gdb_test "info watchpoints" "\[0-9]+\[ \]*.*watchpoint\[ \]*keep\[ \]*n\[ \]*ival3\r\n.*" "watchpoint disabled in table"
 262
 263     # Continue until we hit the finishing marker function.
 264     # Make sure we hit no more watchpoints.
 265     gdb_test "cont" "Continuing.*Breakpoint.*marker2 \\(\\).*" \
 266         "disabled watchpoint skipped"
 267
 268     if [target_info exists gdb,noresults] { return }
 269
 270     gdb_continue_to_end "continue to exit in test_disabling_watchpoints"
 271 }
 272
 273 # Test stepping and other mundane operations with watchpoints enabled
 274 proc test_stepping {} {
 275     global gdb_prompt
 276
 277     if [runto marker1] then {
 278         gdb_test "watch ival2" ".*\[Ww\]atchpoint \[0-9\]*: ival2"
 279
 280         # Well, let's not be too mundane.  It should be a *bit* of a challenge
 281         gdb_test "break func2 if 0" "Breakpoint.*at.*"
 282         gdb_test "p \$func2_breakpoint_number = \$bpnum" " = .*"
 283
 284         gdb_test "p func1 ()" "= 73" \
 285             "calling function with watchpoint enabled"
 286
 287         #
 288         # "finish" brings us back to main.
 289         # On some targets (e.g. alpha) gdb will stop from the finish in midline
 290         # of the marker1 call. This is due to register restoring code on
 291         # the alpha and might be caused by stack adjustment instructions
 292         # on other targets. In this case we will step once more.
 293         #
 294
 295         send_gdb "finish\n"
 296         gdb_expect {
 297             -re "Run.*exit from.*marker1.* at" {
 298                 pass "finish from marker1"
 299             }
 300             default { fail "finish from marker1 (timeout)" ; return }
 301         }
 302
 303         gdb_expect {
 304             -re "marker1 \\(\\);.*$gdb_prompt $" {
 305                 send_gdb "step\n"
 306                 exp_continue
 307             }
 308             -re "func1 \\(\\);.*$gdb_prompt $" {
 309                 pass "back at main from marker1"
 310             }
 311             -re ".*$gdb_prompt $" {
 312                 fail "back at main from marker1"
 313             }
 314             default { fail "back at main from marker1 (timeout)" ; return }
 315         }
 316
 317         gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp"
 318
 319         # Now test that "until" works.  It's a bit tricky to test
 320         # "until", because compilers don't always arrange the code
 321         # exactly the same way, and we might get slightly different
 322         # sequences of statements.  But the following should be true
 323         # (if not it is a compiler or a debugger bug): The user who
 324         # does "until" at every statement of a loop should end up
 325         # stepping through the loop once, and the debugger should not
 326         # stop for any of the remaining iterations.
 327
 328         gdb_test "until" "ival1 = count.*" "until to ival1 assignment"
 329         gdb_test "until" "ival3 = count.*" "until to ival3 assignment"
 330         set test "until out of loop"
 331         gdb_test_multiple "until" $test {
 332             -re "(for \\(count = 0|\}).*$gdb_prompt $" {
 333                 gdb_test "until" "ival1 = count; /. Outside loop ./" $test
 334             }
 335             -re "ival1 = count; /. Outside loop ./.*$gdb_prompt $" {
 336                 pass $test
 337             }
 338         }
 339
 340         gdb_test "step" "ival2 = count.*" "step to ival2 assignment"
 341     }
 342 }
 343
 344 # Test stepping and other mundane operations with watchpoints enabled
 345 proc test_watchpoint_triggered_in_syscall {} {
 346     global gdb_prompt
 347
 348     # These tests won't work without printf support.
 349     if [gdb_skip_stdio_test "watchpoints triggered in syscall"] {
 350         return;
 351     }
 352     # Run until we get to the first marker function.
 353     set x 0
 354     set y 0
 355     set testname "Watch buffer passed to read syscall"
 356     if [runto marker2] then {
 357         gdb_test "watch buf\[0\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[0\\\]"
 358         gdb_test "watch buf\[1\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[1\\\]"
 359         gdb_test "watch buf\[2\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[2\\\]"
 360         gdb_test "watch buf\[3\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[3\\\]"
 361         gdb_test "watch buf\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]"
 362         gdb_test "break marker4" ".*Breakpoint.*"
 363
 364         gdb_test_no_output "set doread = 1"
 365
 366         # If we send gdb "123\n" before gdb has switched the tty, then it goes
 367         # to gdb, not the inferior, and we lose.  So that is why we have
 368         # watchpoint.c prompt us, so we can wait for that prompt.
 369
 370         send_gdb "continue\n";
 371         gdb_expect {
 372             -re "Continuing\\.\r\ntype stuff for buf now:" {
 373                 pass "continue to read"
 374             }
 375             default {
 376                 fail "continue to read";
 377                 return ;
 378             }
 379         }
 380
 381         set test "sent 123"
 382         gdb_test_multiple "123" $test {
 383             -re ".*\[Ww\]atchpoint.*buf\\\[0\\\].*Old value = 0.*New value = 49\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 384             -re ".*\[Ww\]atchpoint.*buf\\\[1\\\].*Old value = 0.*New value = 50\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 385             -re ".*\[Ww\]atchpoint.*buf\\\[2\\\].*Old value = 0.*New value = 51\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 386             -re ".*\[Ww\]atchpoint.*buf\\\[3\\\].*Old value = 0.*New value = 10\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 387             -re ".*$gdb_prompt $" { pass $test }
 388         }
 389
 390         # Examine the values in buf to see how many watchpoints we
 391         # should have printed.
 392         set test "print buf\[0\]"
 393         gdb_test_multiple $test $test {
 394             -re ".*= 49.*$gdb_prompt $" { set y [expr $y+1]; pass $test }
 395             -re ".*= 0.*$gdb_prompt $" { $test }
 396         }
 397         set test "print buf\[1\]"
 398         gdb_test_multiple $test $test {
 399             -re ".*= 50.*$gdb_prompt $" { set y [expr $y+1]; pass $test }
 400             -re ".*= 0.*$gdb_prompt $" { pass $test }
 401         }
 402         set test "print buf\[2\]"
 403         gdb_test_multiple $test $test {
 404             -re ".*= 51.*$gdb_prompt $" { set y [expr $y+1]; pass $test }
 405             -re ".*= 0.*$gdb_prompt $" { pass $test }
 406         }
 407         set test "print buf\[3\]"
 408         gdb_test_multiple $test $test {
 409             -re ".*= 10.*$gdb_prompt $" { set y [expr $y+1]; pass $test }
 410             -re ".*= 0.*$gdb_prompt $" { pass $test }
 411         }
 412
 413         # Did we find what we were looking for?  If not, flunk it.
 414         if [expr $x==$y] then { pass $testname } else { fail "$testname (only triggered $x watchpoints, expected $y)"}
 415
 416         # Continue until we hit the finishing marker function.
 417         # Make sure we hit no more watchpoints.
 418         gdb_test "cont" "Continuing.*Breakpoint.*marker4 \\(\\).*" \
 419             "continue to marker4"
 420
 421         # Disable everything so we can finish the program at full speed
 422         gdb_test_no_output "disable" "disable in test_watchpoint_triggered_in_syscall"
 423
 424         if [target_info exists gdb,noresults] { return }
 425
 426         gdb_continue_to_end "continue to exit in test_watchpoint_triggered_in_syscall"
 427     }
 428 }
 429
 430 # Do a simple test of of watching through a pointer when the pointer
 431 # itself changes.  Should add some more complicated stuff here.
 432
 433 proc test_complex_watchpoint {} {
 434     global gdb_prompt
 435
 436     if [runto marker4] then {
 437         gdb_test "watch ptr1->val" ".*\[Ww\]atchpoint \[0-9\]*: ptr1->val"
 438         gdb_test "break marker5" ".*Breakpoint.*"
 439
 440         gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ptr1->val.*Old value = 1.*New value = 2.*" "Test complex watchpoint"
 441
 442         # Continue until we hit the marker5 function.
 443         # Make sure we hit no more watchpoints.
 444
 445         gdb_test "cont" "Continuing.*Breakpoint.*marker5 \\(\\).*" \
 446             "did not trigger wrong watchpoint"
 447
 448         # Test watches of things declared locally in a function.
 449         # In particular, test that a watch of stack-based things
 450         # is deleted when the stack-based things go out of scope.
 451         #
 452         gdb_test_no_output "disable" "disable in test_complex_watchpoint"
 453         gdb_test "break marker6" ".*Breakpoint.*"
 454         gdb_test "cont" "Continuing.*Breakpoint.*marker6 \\(\\).*" \
 455             "continue to marker6"
 456         gdb_test "break func2" ".*Breakpoint.*"
 457         gdb_test "cont" "Continuing.*func2.*"
 458
 459         # Test a watch of a single stack-based variable, whose scope
 460         # is the function we're now in.  This should auto-delete when
 461         # execution exits the scope of the watchpoint.
 462         #
 463         gdb_test "watch local_a" ".*\[Ww\]atchpoint \[0-9\]*: local_a" "set local watch"
 464         gdb_test "cont" "\[Ww\]atchpoint.*local_a.*" "trigger local watch"
 465         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" "self-delete local watch"
 466
 467         gdb_test "cont" "Continuing.*func2.*"
 468         # We should be in "func2" again now.  Test a watch of an
 469         # expression which includes both a stack-based local and
 470         # something whose scope is larger than this invocation
 471         # of "func2".  This should also auto-delete.
 472         #
 473         gdb_test "watch local_a + ival5" ".*\[Ww\]atchpoint \[0-9\]*: local_a . ival5" \
 474                  "set partially local watch"
 475         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
 476                  "trigger1 partially local watch"
 477         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
 478                  "trigger2 partially local watch"
 479         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 480                  "self-delete partially local watch"
 481
 482         # We should be in "func2" again now.  Test a watch of a
 483         # static (non-stack-based) local.  Since this has scope
 484         # across any invocations of "func2", it should not auto-
 485         # delete.
 486         #
 487         gdb_test "cont" "Continuing.*func2.*"
 488         gdb_test "watch static_b" ".*\[Ww\]atchpoint \[0-9\]*: static_b" \
 489                  "set static local watch"
 490         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: static_b.*" \
 491                  "trigger static local watch"
 492         gdb_test "cont" "Continuing.*marker6 \\(\\).*" \
 493                  "continue after trigger static local watch"
 494         gdb_test "info break" ".*watchpoint.*static_b.*" \
 495                  "static local watch did not self-delete"
 496
 497         # We should be in "recurser" now.  Test a watch of a stack-
 498         # based local.  Symbols mentioned in a watchpoint are bound
 499         # at watchpoint-creation.  Thus, a watch of a stack-based
 500         # local to a recursing function should be bound only to that
 501         # one invocation, and should not trigger for other invocations.
 502         #
 503         gdb_test "tbreak recurser" ".*breakpoint.*"
 504         gdb_test "cont" "Continuing.*recurser.*"
 505         gdb_test "next" "if \\(x > 0.*" "next past local_x initialization"
 506         gdb_test "watch local_x" ".*\[Ww\]atchpoint \[0-9\]*: local_x" \
 507                  "set local watch in recursive call"
 508         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_x.*New value = 2.*" \
 509                  "trigger local watch in recursive call"
 510         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 511                  "self-delete local watch in recursive call"
 512
 513         # Repeat the preceding test, but this time use "recurser::local_x" as
 514         # the variable to track.
 515         gdb_test "cont" "Continuing.*marker6.*"
 516         gdb_test "tbreak recurser" ".*breakpoint.*"
 517         gdb_test "cont" "Continuing.*recurser.*"
 518         gdb_test "next" "if \\(x > 0.*" "next past local_x initialization"
 519         gdb_test "watch recurser::local_x" ".*\[Ww\]atchpoint \[0-9\]*: recurser::local_x" \
 520                  "set local watch in recursive call with explicit scope"
 521         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: recurser::local_x.*New value = 2.*" \
 522                  "trigger local watch with explicit scope in recursive call"
 523         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 524                  "self-delete local watch with explicit scope in recursive call (2)"
 525
 526         # Disable everything so we can finish the program at full speed
 527         gdb_test_no_output "disable" "disable in test_complex_watchpoint"
 528
 529         if [target_info exists gdb,noresults] { return }
 530
 531         gdb_continue_to_end "continue to exit in test_complex_watchpoint"
 532     }
 533 }
 534
 535 proc test_watchpoint_and_breakpoint {} {
 536     global gdb_prompt
 537
 538     # This is a test for PR gdb/38, which involves setting a
 539     # watchpoint right after you've reached a breakpoint.
 540
 541     if [runto func3] then {
 542         gdb_breakpoint [gdb_get_line_number "second x assignment"]
 543         gdb_continue_to_breakpoint "second x assignment"
 544         gdb_test "watch x" ".*atchpoint \[0-9\]+: x"
 545         gdb_test_multiple "next" "next after watch x" {
 546             -re ".*atchpoint \[0-9\]+: x\r\n\r\nOld value = 0\r\nNew value = 1\r\n.*$gdb_prompt $" {
 547                 pass "next after watch x"
 548             }
 549             -re "\[0-9\]+\[\t \]+y = 1;\r\n$gdb_prompt $" {
 550                 kfail "gdb/38" "next after watch x"
 551             }
 552         }
 553
 554         gdb_test_no_output "delete \$bpnum" "delete watch x"
 555     }
 556 }
 557
 558 proc test_constant_watchpoint {} {
 559     gdb_test "watch 5" "Cannot watch constant value `5'." "number is constant"
 560     gdb_test "watch marker1" "Cannot watch constant value `marker1'." \
 561     "marker1 is constant"
 562     gdb_test "watch count + 6" ".*atchpoint \[0-9\]+: count \\+ 6"
 563     gdb_test_no_output "delete \$bpnum" "delete watchpoint `count + 6'"
 564     gdb_test "watch 7 + count" ".*atchpoint \[0-9\]+: 7 \\+ count"
 565     gdb_test_no_output "delete \$bpnum" "delete watchpoint `7 + count'"
 566 }
 567
 568 proc test_disable_enable_software_watchpoint {} {
 569     # This is regression test for a bug that caused `enable' to fail
 570     # for software watchpoints.
 571
 572     # Watch something not memory to force a software watchpoint.
 573     gdb_test {watch $pc} ".*atchpoint \[0-9\]+: .pc"
 574
 575     gdb_test_no_output "disable \$bpnum" "disable watchpoint `\$pc'"
 576     gdb_test_no_output "enable \$bpnum" "reenable watchpoint `\$pc'"
 577
 578     gdb_test "info watchpoint \$bpnum" \
 579         ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+.pc.*" \
 580         "watchpoint `\$pc' is enabled"
 581
 582     gdb_test_no_output "delete \$bpnum" "delete watchpoint `\$pc'"
 583 }
 584
 585 proc test_watch_location {} {
 586     gdb_breakpoint [gdb_get_line_number "func5 breakpoint here"]
 587     gdb_continue_to_breakpoint "func5 breakpoint here"
 588
 589     gdb_test "watch -location *x" "atchpoint .*: .*" "watch -location .x"
 590
 591     gdb_test "continue" \
 592         "Continuing.*\[Ww\]atchpoint .*: .*New value = 27.*" \
 593         "continue with watch -location"
 594
 595     gdb_test_no_output "delete \$bpnum" "delete watch -location"
 596 }
 597
 598 # Tests watching areas larger than a word.
 599
 600 proc test_wide_location_1 {} {
 601     # This test watches two words on most 32-bit ABIs, and one word on
 602     # most 64-bit ABIs.
 603
 604     # Platforms where the target can't watch such a large region
 605     # should clear hw_expected below.
 606     if [target_info exists gdb,no_hardware_watchpoints] {
 607         set hw_expected 0
 608     } else {
 609         set hw_expected 1
 610     }
 611
 612     gdb_breakpoint [gdb_get_line_number "func6 breakpoint here"]
 613     gdb_continue_to_breakpoint "func6 breakpoint here"
 614
 615     if { $hw_expected } {
 616         gdb_test "watch foo2" "Hardware watchpoint .*: .*" "watch foo2"
 617         gdb_test "continue" \
 618             "Continuing.*Hardware watchpoint .*: .*New value = \\\{val = \\\{0, 11\\\}\\\}.*" \
 619             "continue with watch foo2"
 620     } else {
 621         gdb_test "watch foo2" "atchpoint .*: .*" "watch foo2"
 622         gdb_test "continue" \
 623             "Continuing.*\[Ww\]atchpoint .*: .*New value = \\\{val = \\\{0, 11\\\}\\\}.*" \
 624             "continue with watch foo2"
 625     }
 626
 627     gdb_test_no_output "delete \$bpnum" "delete watch foo2"
 628 }
 629
 630 proc test_wide_location_2 {} {
 631     # This test watches four words on most 32-bit ABIs, and two words
 632     # on 64-bit ABIs.
 633
 634     # Platforms where the target can't watch such a large region
 635     # should clear hw_expected below.
 636     if [target_info exists gdb,no_hardware_watchpoints] {
 637         set hw_expected 0
 638     } else {
 639         set hw_expected 1
 640     }
 641
 642     gdb_breakpoint [gdb_get_line_number "func7 breakpoint here"]
 643     gdb_continue_to_breakpoint "func7 breakpoint here"
 644
 645     if { $hw_expected } {
 646         gdb_test "watch foo4" "Hardware watchpoint .*: .*" "watch foo4"
 647         gdb_test "continue" \
 648             "Continuing.*Hardware watchpoint .*: .*New value = \\\{val = \\\{0, 0, 0, 33\\\}\\\}.*" \
 649             "continue with watch foo4"
 650     } else {
 651         gdb_test "watch foo4" "atchpoint .*: .*" "watch foo4"
 652         gdb_test "continue" \
 653             "Continuing.*\[Ww\]atchpoint .*: .*New value = \\\{val = \\\{0, 0, 0, 33\\\}\\\}.*" \
 654             "continue with watch foo4"
 655     }
 656
 657     gdb_test_no_output "delete \$bpnum" "delete watch foo4"
 658 }
 659
 660 proc test_inaccessible_watchpoint {} {
 661     global gdb_prompt
 662
 663     # This is a test for watchpoints on currently inaccessible (but later
 664     # valid) memory.
 665
 666     if [runto func4] then {
 667         # Make sure we only allow memory access errors.
 668         set msg "watchpoint refused to insert on nonexistent struct member"
 669         gdb_test_multiple "watch struct1.nosuchmember" $msg {
 670             -re ".*atchpoint \[0-9\]+: struct1.nosuchmember.*$gdb_prompt $" {
 671                 # PR breakpoints/9681
 672                 fail $msg
 673             }
 674             -re "There is no member named nosuchmember\\..*$gdb_prompt $" {
 675                 pass $msg
 676             }
 677         }
 678
 679         # See whether a watchpoint on a normal variable is a hardware
 680         # watchpoint or not.  The watchpoints on NULL should be hardware
 681         # iff this one is.
 682         set watchpoint_msg "Watchpoint"
 683         gdb_test_multiple "watch global_ptr" "watch global_ptr" {
 684             -re "Watchpoint \[0-9\]+: global_ptr\r\n.*$gdb_prompt $" {
 685                 pass "watch global_ptr"
 686             }
 687             -re "Hardware watchpoint \[0-9\]+: global_ptr\r\n.*$gdb_prompt $" {
 688                 set watchpoint_msg "Hardware watchpoint"
 689                 pass "watch global_ptr"
 690             }
 691         }
 692         delete_breakpoints
 693
 694         # Make sure that we can watch a constant address, and correctly
 695         # use a HW watchpoint if supported.
 696         gdb_test "watch *(int *) 0" \
 697             "$watchpoint_msg \[0-9\]+: \\*\\(int \\*\\) 0"
 698         delete_breakpoints
 699
 700         # The same, but using -location through an indirection.
 701         gdb_test "watch -location *global_ptr" \
 702             "$watchpoint_msg \[0-9\]+: \-location \\*global_ptr"
 703         delete_breakpoints
 704
 705         # This step requires two HW watchpoints.  Since some platforms only
 706         # have a single one, accept either SW or HW watchpoint in this case.
 707         if {[skip_hw_watchpoint_multi_tests]} {
 708             set watchpoint_msg "(Watchpoint|Hardware watchpoint)"
 709         }
 710
 711         gdb_test "watch *global_ptr" "$watchpoint_msg \[0-9\]+: \\\*global_ptr"
 712         gdb_test "set \$global_ptr_breakpoint_number = \$bpnum" ""
 713         gdb_test "next" ".*global_ptr = buf.*" "global_ptr next"
 714         gdb_test_multiple "next" "next over ptr init" {
 715             -re ".*atchpoint \[0-9\]+: \\*global_ptr\r\n\r\nOld value = .*\r\nNew value = 3 .*\r\n.*$gdb_prompt $" {
 716                 # We can not test for <unknown> here because NULL may be readable.
 717                 # This test does rely on *NULL != 3.
 718                 pass "next over ptr init"
 719             }
 720         }
 721         gdb_test_multiple "next" "next over buffer set" {
 722             -re ".*atchpoint \[0-9\]+: \\*global_ptr\r\n\r\nOld value = 3 .*\r\nNew value = 7 .*\r\n.*$gdb_prompt $" {
 723                 pass "next over buffer set"
 724             }
 725         }
 726         gdb_test "delete \$global_ptr_breakpoint_number" ""
 727         gdb_test "watch **global_ptr_ptr" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr"
 728         gdb_test "set \$global_ptr_ptr_breakpoint_number = \$bpnum" ""
 729         gdb_test "next" ".*global_ptr_ptr = &global_ptr.*" "global_ptr_ptr next"
 730         gdb_test "next" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr\[\r\n\]+Old value = .*\r\nNew value = 7 .*" "next over global_ptr_ptr init"
 731         gdb_test "next" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr\[\r\n\]+Old value = 7 .*\r\nNew value = 9 .*" "next over global_ptr_ptr buffer set"
 732         gdb_test "next" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr\[\r\n\]+Old value = 9 .*\r\nNew value = 5 .*" "next over global_ptr_ptr pointer advance"
 733         gdb_test_no_output "delete \$global_ptr_ptr_breakpoint_number"
 734     }
 735 }
 736
 737 proc test_watchpoint_in_big_blob {} {
 738     global gdb_prompt
 739
 740     gdb_test "watch buf" ".*atchpoint \[0-9\]+: buf"
 741     gdb_test "cont" "Continuing.*atchpoint \[0-9\]+: buf\r\n\r\nOld value = .*testte\".*" "watchpoint on buf hit"
 742
 743     gdb_test_no_output "delete \$bpnum" "delete watch buf"
 744 }
 745
 746 # Start with a fresh gdb.
 747
 748 gdb_exit
 749 gdb_start
 750 gdb_reinitialize_dir $srcdir/$subdir
 751 gdb_load $binfile
 752 set prev_timeout $timeout
 753 set timeout 600
 754 verbose "Timeout now 600 sec.\n"
 755
 756 if [initialize] then {
 757
 758     test_simple_watchpoint
 759
 760     # The IDT/sim monitor only has 8 (!) open files, of which it uses
 761     # 4 (!).  So we have to make sure one program exits before
 762     # starting another one.
 763     if [istarget "mips-idt-*"] then {
 764         gdb_exit
 765         gdb_start
 766         gdb_reinitialize_dir $srcdir/$subdir
 767         gdb_load $binfile
 768         initialize
 769     }
 770
 771     test_disabling_watchpoints
 772
 773     # See above.
 774     if [istarget "mips-idt-*"] then {
 775         gdb_exit
 776         gdb_start
 777         gdb_reinitialize_dir $srcdir/$subdir
 778         gdb_load $binfile
 779         initialize
 780     }
 781
 782     if ![target_info exists gdb,cannot_call_functions] {
 783         test_stepping
 784     }
 785
 786     # Tests below don't rely on the markers and watchpoint set by
 787     # `initialize' anymore.
 788     clean_restart $testfile
 789
 790     # Only enabled for some targets merely because it has not been tested
 791     # elsewhere.
 792     # On sparc-sun-sunos4.1.3, GDB was running all the way to the marker4
 793     # breakpoint before stopping for the watchpoint.  I don't know why.
 794     if {[istarget "hppa*-*-*"]} then {
 795         test_watchpoint_triggered_in_syscall
 796     }
 797
 798     # See above.
 799     if [istarget "mips-idt-*"] then {
 800         gdb_exit
 801         gdb_start
 802         gdb_reinitialize_dir $srcdir/$subdir
 803         gdb_load $binfile
 804     }
 805
 806     # Only enabled for some targets merely because it has not been tested
 807     # elsewhere.
 808     if {[istarget "hppa*-*-*"] || \
 809             [istarget "sparc*-*-sunos*"] || \
 810             [istarget "m32r-*-*"]} then {
 811         test_complex_watchpoint
 812     }
 813
 814     test_inaccessible_watchpoint
 815
 816     # Verify that a user can force GDB to use "slow" watchpoints.
 817     # (This proves rather little on kernels that don't support
 818     # fast watchpoints, but still...)
 819     #
 820     if ![runto_main] then { fail "watch tests suppressed" }
 821
 822     gdb_test_no_output "set can-use-hw-watchpoints 0" "disable fast watches"
 823
 824     gdb_test "show can-use-hw-watchpoints" \
 825         "Debugger's willingness to use watchpoint hardware is 0." \
 826         "show disable fast watches"
 827
 828     gdb_test "watch ival3 if  count > 1" \
 829         "Watchpoint \[0-9\]*: ival3.*" \
 830         "set slow conditional watch"
 831
 832     gdb_test "continue" \
 833         "Watchpoint \[0-9\]*: ival3.*Old value = 1.*New value = 2.*" \
 834         "trigger slow conditional watch"
 835
 836     # We've explicitly disabled hardware watches.  Verify that GDB
 837     # refrains from using them.
 838     #
 839     gdb_test "rwatch ival3" \
 840         "Expression cannot be implemented with read/access watchpoint..*" \
 841         "rwatch disallowed when can-set-hw-watchpoints cleared"
 842
 843     # See above.
 844     if [istarget "mips-idt-*"] then {
 845         gdb_exit
 846         gdb_start
 847         gdb_reinitialize_dir $srcdir/$subdir
 848         gdb_load $binfile
 849     }
 850
 851     test_watchpoint_and_breakpoint
 852
 853     test_watchpoint_in_big_blob
 854
 855     # See above.
 856     if [istarget "mips-idt-*"] then {
 857         clean_restart
 858     }
 859
 860     test_constant_watchpoint
 861
 862     test_disable_enable_software_watchpoint
 863
 864     test_watch_location
 865
 866     # Re-enable hardware watchpoints if necessary.
 867     if ![target_info exists gdb,no_hardware_watchpoints] {
 868         gdb_test_no_output "set can-use-hw-watchpoints 1" ""
 869     }
 870
 871     test_wide_location_1
 872     test_wide_location_2
 873 }
 874
 875 # Restore old timeout
 876 set timeout $prev_timeout
 877 verbose "Timeout now $timeout sec.\n"