gdb/testsuite/gdb.base/watchpoint.exp

   1 # Copyright (C) 1992, 1994, 1997, 1998 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 2 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, write to the Free Software
  15 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  16
  17 # Please email any bugs, comments, and/or additions to this file to:
  18 # bug-gdb@prep.ai.mit.edu
  19
  20 # This file was written by Fred Fish. (fnf@cygnus.com)
  21
  22 if $tracelevel then {
  23     strace $tracelevel
  24 }
  25
  26 set prms_id 0
  27 set bug_id 0
  28
  29 set testfile "watchpoint"
  30 set srcfile ${testfile}.c
  31 set binfile ${objdir}/${subdir}/${testfile}
  32
  33 set wp_set 1
  34
  35 if [get_compiler_info ${binfile}] {
  36     return -1
  37 }
  38
  39 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  40      gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
  41 }
  42
  43 # Prepare for watchpoint tests by setting up two breakpoints and one
  44 # watchpoint.
  45 #
  46 # We use breakpoints at marker functions to get past all the startup code,
  47 # so we can get to the watchpoints in a reasonable amount of time from a
  48 # known starting point.
  49 #
  50 # For simplicity, so we always know how to reference specific breakpoints or
  51 # watchpoints by number, we expect a particular ordering and numbering of
  52 # each in the combined breakpoint/watchpoint table, as follows:
  53 #
  54 #       Number          What            Where
  55 #       1               Breakpoint      marker1()
  56 #       2               Breakpoint      marker2()
  57 #       3               Watchpoint      ival3
  58
  59 proc initialize {} {
  60     global gdb_prompt
  61     global hex
  62     global decimal
  63     global srcfile
  64     global wp_set
  65
  66     if [gdb_test "break marker1" "Breakpoint 1 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker1" ] {
  67       return 0;
  68     }
  69
  70
  71     if [gdb_test "break marker2" "Breakpoint 2 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker2" ] {
  72       return 0;
  73     }
  74
  75
  76     if [gdb_test "info break" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*" "info break in watchpoint.exp" ] {
  77       return 0;
  78     }
  79
  80
  81     # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint
  82     # before running can cause the inferior to croak on HP-UX 11.0 for
  83     # reasons yet unknown, we've disabled the ability to set watches
  84     # without a running inferior.  Verify the restriction.
  85     #
  86     send_gdb "watch ival3\n"
  87     gdb_expect {
  88         -re ".*\[Ww\]atchpoint 3: ival3.*$gdb_prompt $" {
  89             pass "set watchpoint on ival3"
  90         }
  91         -re "warning: can't do that without a running program; try \"break main\", \"run\" first.*$gdb_prompt $" {
  92             pass "set watchpoint on ival3"
  93             set wp_set 0
  94             return 1
  95         }
  96         timeout {
  97             fail "(timeout) set watchpoint on ival3"
  98             return 0
  99         }
 100     }
 101
 102     # "info watch" is the same as "info break"
 103
 104     if [gdb_test "info watch" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n3\[ \]*.*watchpoint.*ival3" "watchpoint found in watchpoint/breakpoint table" ] {
 105       return 0;
 106     }
 107
 108
 109     # After installing the watchpoint, we disable it until we are ready
 110     # to use it.  This allows the test program to run at full speed until
 111     # we get to the first marker function.
 112
 113     if [gdb_test "disable 3" "disable 3\[\r\n\]+" "disable watchpoint" ] {
 114       return 0;
 115     }
 116
 117
 118     return 1
 119 }
 120
 121 #
 122 # Test simple watchpoint.
 123 #
 124
 125 proc test_simple_watchpoint {} {
 126     global gdb_prompt
 127     global hex
 128     global decimal
 129     global wp_set
 130
 131     # Ensure that the watchpoint is disabled when we startup.
 132
 133     if { $wp_set } {
 134         if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_simple_watchpoint" ] {
 135             return 0;
 136         }
 137     }
 138
 139
 140     # Run until we get to the first marker function.
 141
 142     gdb_run_cmd
 143     set timeout 600
 144     gdb_expect {
 145         -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
 146             pass "run to marker1 in test_simple_watchpoint"
 147         }
 148         -re ".*$gdb_prompt $" {
 149             fail "run to marker1 in test_simple_watchpoint"
 150             return
 151         }
 152         timeout {
 153             fail "run to marker1 in test_simple_watchpoint (timeout)"
 154             return
 155         }
 156     }
 157
 158     if { !$wp_set } {
 159         # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint
 160         # before running can cause the inferior to croak on HP-UX 11.0
 161         # for reasons yet unknown, we've disabled the ability to set
 162         # watches without a running inferior.  The following testpoints used
 163         # to be in [initialize].
 164         #
 165         send_gdb "watch ival3\n"
 166         gdb_expect {
 167             -re ".*\[Ww\]atchpoint 3: ival3\r\n$gdb_prompt $" {
 168                 pass "set watchpoint on ival3"
 169             }
 170             -re ".*$gdb_prompt $" { fail "set watchpoint on ival3"  }
 171             timeout { fail "set watchpoint on ival3 (timeout)"  }
 172         }
 173
 174         set wp_set 1
 175
 176         # "info watch" is the same as "info break"
 177
 178         send_gdb "info watch\n"
 179         gdb_expect {
 180             -re "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n3\[ \]*.*watchpoint.*ival3\r\n$gdb_prompt $" {
 181                 pass "watchpoint found in watchpoint/breakpoint table"
 182             }
 183             -re ".*$gdb_prompt $" {
 184                 fail "watchpoint found in watchpoint/breakpoint table"
 185             }
 186             timeout {
 187                fail "watchpoint found in watchpoint/breakpoint table"
 188             }
 189         }
 190
 191         # After installing the watchpoint, we disable it until we are ready
 192         # to use it.  This allows the test program to run at full speed until
 193         # we get to the first marker function.
 194
 195         send_gdb "disable 3\n"
 196         gdb_expect {
 197             -re "disable 3\[\r\n\]+$gdb_prompt $" { pass "disable watchpoint" }
 198             -re ".*$gdb_prompt $" { fail "disable watchpoint"  }
 199             timeout { fail "disable watchpoint (timeout)"  }
 200         }
 201     }
 202
 203     # After reaching the marker function, enable the watchpoint.
 204
 205     if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "enable watchpoint" ] {
 206       return ;
 207     }
 208
 209
 210     gdb_test "break func1" "Breakpoint.*at.*"
 211     gdb_test "set \$func1_breakpoint_number = \$bpnum" ""
 212
 213     gdb_test "continue" "Continuing.*Breakpoint \[0-9\]*, func1.*" \
 214         "continue to breakpoint at func1"
 215
 216     # Continue until the first change, from -1 to 0
 217
 218     send_gdb "cont\n"
 219     gdb_expect {
 220         -re "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*$gdb_prompt $" {
 221             pass "watchpoint hit, first time"
 222         }
 223         -re "Continuing.*Breakpoint.*func1.*$gdb_prompt $" {
 224             setup_xfail "m68*-*-*" 2597
 225             fail "thought it hit breakpoint at func1 twice"
 226             gdb_test "delete \$func1_breakpoint_number" ""
 227             gdb_test "continue" "\
 228 Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count;" \
 229                 "watchpoint hit, first time"
 230         }
 231         -re ".*$gdb_prompt $" { fail "watchpoint hit, first time" ; return }
 232         timeout { fail "watchpoint hit, first time (timeout)" ; return }
 233         eof { fail "watchpoint hit, first time (eof)" ; return }
 234     }
 235
 236     # Check that the hit count is reported correctly
 237     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 1 time.*" "Watchpoint hit count is 1"
 238
 239     gdb_test "delete \$func1_breakpoint_number" ""
 240
 241     # Continue until the next change, from 0 to 1.
 242     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit, second time"
 243
 244     # Check that the hit count is reported correctly
 245     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 2 times.*" "Watchpoint hit count is 2"
 246
 247     # Continue until the next change, from 1 to 2.
 248     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 1.*New value = 2.*ival3 = count; ival4 = count;.*" "watchpoint hit, third time"
 249
 250     # Check that the hit count is reported correctly
 251     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 3 times.*" "Watchpoint hit count is 3"
 252
 253     # Continue until the next change, from 2 to 3.
 254     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 2.*New value = 3.*ival3 = count; ival4 = count;.*" "watchpoint hit, fourth time"
 255
 256     # Check that the hit count is reported correctly
 257     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 4 times.*" "Watchpoint hit count is 4"
 258
 259     # Continue until the next change, from 3 to 4.
 260     # Note that this one is outside the loop.
 261
 262     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 3.*New value = 4.*ival3 = count; ival4 = count;.*" "watchpoint hit, fifth time"
 263
 264     # Check that the hit count is reported correctly
 265     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 5 times.*" "Watchpoint hit count is 5"
 266
 267     # Continue until we hit the finishing marker function.
 268     # Make sure we hit no more watchpoints.
 269
 270     gdb_test "cont" "Continuing.*Breakpoint.*marker2 \(\).*" \
 271         "continue to marker2"
 272
 273     # Disable the watchpoint so we run at full speed until we exit.
 274
 275     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "watchpoint disabled" ] {
 276       return ;
 277     }
 278
 279
 280     # Run until process exits.
 281
 282     if [target_info exists gdb,noresults] { return }
 283
 284     gdb_continue_to_end "continue to exit in test_simple_watchpoint"
 285 }
 286
 287 # Test disabling watchpoints.
 288
 289 proc test_disabling_watchpoints {} {
 290     global gdb_prompt
 291     global binfile
 292     global srcfile
 293     global decimal
 294     global hex
 295
 296     # "info watch" is the same as "info break"
 297     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"
 298
 299     # Ensure that the watchpoint is disabled when we startup.
 300
 301     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_disabling_watchpoints" ] {
 302       return 0;
 303     }
 304
 305
 306     # Run until we get to the first marker function.
 307
 308     gdb_run_cmd
 309     set timeout 600
 310     gdb_expect {
 311         -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
 312             pass "run to marker1 in test_disabling_watchpoints"
 313         }
 314         -re ".*$gdb_prompt $" {
 315             fail "run to marker1 in test_disabling_watchpoints"
 316             return
 317         }
 318         timeout {
 319             fail "run to marker1 in test_disabling_watchpoints (timeout)"
 320             return
 321         }
 322     }
 323
 324     # After reaching the marker function, enable the watchpoint.
 325
 326     if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "watchpoint enabled" ] {
 327       return ;
 328     }
 329
 330
 331     # Continue until the first change, from -1 to 0
 332     # Don't check the old value, because on VxWorks the variable value
 333     # will not have been reinitialized.
 334     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = .*New value = 0.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, first time"
 335
 336     # Continue until the next change, from 0 to 1.
 337     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"
 338
 339     # Disable the watchpoint but leave breakpoints
 340
 341     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint #2 in test_disabling_watchpoints" ] {
 342       return 0;
 343     }
 344
 345
 346     # Check watchpoint list, looking for the entry that confirms the
 347     # watchpoint is disabled.
 348     gdb_test "info watchpoints" "\[0-9]+\[ \]*.*watchpoint\[ \]*keep\[ \]*n\[ \]*ival3\r\n.*" "watchpoint disabled in table"
 349
 350     # Continue until we hit the finishing marker function.
 351     # Make sure we hit no more watchpoints.
 352     gdb_test "cont" "Continuing.*Breakpoint.*marker2 \\(\\).*" \
 353         "disabled watchpoint skipped"
 354
 355     if [target_info exists gdb,noresults] { return }
 356
 357     gdb_continue_to_end "continue to exit in test_disabling_watchpoints"
 358 }
 359
 360 # Test stepping and other mundane operations with watchpoints enabled
 361 proc test_stepping {} {
 362     global gdb_prompt
 363
 364     if [runto marker1] then {
 365         gdb_test "watch ival2" ".*\[Ww\]atchpoint \[0-9\]*: ival2"
 366
 367         # Well, let's not be too mundane.  It should be a *bit* of a challenge
 368         gdb_test "break func2 if 0" "Breakpoint.*at.*"
 369         gdb_test "p \$func2_breakpoint_number = \$bpnum" " = .*"
 370
 371         # The problem is that GDB confuses stepping through the call
 372         # dummy with hitting the breakpoint at the end of the call dummy.
 373         # Will be fixed once all architectures define
 374         # CALL_DUMMY_BREAKPOINT_OFFSET.
 375         setup_xfail "*-*-*"
 376         # This doesn't occur if the call dummy starts with a call,
 377         # because we are out of the dummy by the first time the inferior
 378         # stops.
 379         clear_xfail "d10v*-*-*"
 380         clear_xfail "m68*-*-*"
 381         clear_xfail "i*86*-*-*"
 382         clear_xfail "vax-*-*"
 383         # The following architectures define CALL_DUMMY_BREAKPOINT_OFFSET.
 384         clear_xfail "alpha-*-*"
 385         clear_xfail "mips*-*-*"
 386         clear_xfail "sparc-*-*"
 387         clear_xfail "hppa*-*-*bsd*"
 388         # It works with the generic inferior function calling code too.
 389         clear_xfail "mn10200*-*-*"
 390         clear_xfail "mn10300*-*-*"
 391         # The following architectures define CALL_DUMMY_HAS_COMPLETED.
 392         clear_xfail "hppa*-*-*hpux*"
 393         gdb_test "p func1 ()" "= 73" \
 394         "calling function with watchpoint enabled"
 395
 396         #
 397         # "finish" brings us back to main.
 398         # On some targets (e.g. alpha) gdb will stop from the finish in midline
 399         # of the marker1 call. This is due to register restoring code on
 400         # the alpha and might be caused by stack adjustment instructions
 401         # on other targets. In this case we will step once more.
 402         #
 403
 404         send_gdb "finish\n"
 405         gdb_expect {
 406             -re "Run.*exit from.*marker1.* at" {
 407                 pass "finish from marker1"
 408             }
 409             default { fail "finish from marker1" ; return }
 410         }
 411
 412         gdb_expect {
 413             -re "marker1 \\(\\);.*$gdb_prompt $" {
 414                 send_gdb "step\n"
 415                 exp_continue
 416             }
 417             -re "func1 \\(\\);.*$gdb_prompt $" {
 418                 pass "finish from marker1"
 419             }
 420             -re ".*$gdb_prompt $" {
 421                 fail "finish from marker1"
 422             }
 423             default { fail "finish from marker1" ; return }
 424         }
 425
 426         gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp"
 427
 428         # Now test that "until" works.  It's a bit tricky to test
 429         # "until", because compilers don't always arrange the code
 430         # exactly the same way, and we might get slightly different
 431         # sequences of statements.  But the following should be true
 432         # (if not it is a compiler or a debugger bug): The user who
 433         # does "until" at every statement of a loop should end up
 434         # stepping through the loop once, and the debugger should not
 435         # stop for any of the remaining iterations.
 436
 437         gdb_test "until" "ival1 = count.*" "until to ival1 assignment"
 438         gdb_test "until" "ival3 = count.*" "until to ival3 assignment"
 439         send_gdb "until\n"
 440         gdb_expect {
 441             -re "(for \\(count = 0|\}).*$gdb_prompt $" {
 442                 gdb_test "until" "ival1 = count; /. Outside loop ./" \
 443                     "until out of loop"
 444             }
 445             -re "ival1 = count; /. Outside loop ./.*$gdb_prompt $" {
 446                 pass "until out of loop"
 447             }
 448             -re ".*$gdb_prompt $" {
 449                 fail "until out of loop"
 450             }
 451             default { fail "until out of loop" ; return }
 452         }
 453
 454         gdb_test "step" "ival2 = count.*" "step to ival2 assignment"
 455     }
 456 }
 457
 458 # Test stepping and other mundane operations with watchpoints enabled
 459 proc test_watchpoint_triggered_in_syscall {} {
 460     global gdb_prompt
 461
 462     if [target_info exists gdb,noinferiorio] {
 463         verbose "Skipping test_watchpoint_triggered_in_syscall due to noinferiorio"
 464         return
 465     }
 466     # Run until we get to the first marker function.
 467     set x 0
 468     set y 0
 469     set testname "Watch buffer passed to read syscall"
 470     if [runto marker2] then {
 471         gdb_test "watch buf\[0\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[0\\\]"
 472         gdb_test "watch buf\[1\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[1\\\]"
 473         gdb_test "watch buf\[2\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[2\\\]"
 474         gdb_test "watch buf\[3\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[3\\\]"
 475         gdb_test "watch buf\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]"
 476         gdb_test "break marker4" ".*Breakpoint.*"
 477
 478         gdb_test "set doread = 1" ""
 479
 480         # If we send_gdb "123\n" before gdb has switched the tty, then it goes
 481         # to gdb, not the inferior, and we lose.  So that is why we have
 482         # watchpoint.c prompt us, so we can wait for that prompt.
 483         send_gdb "continue\n";
 484         gdb_expect {
 485             -re "Continuing\\.\r\ntype stuff for buf now:" {
 486                 pass "continue to read"
 487             }
 488             default {
 489                 fail "continue to read";
 490                 return ;
 491             }
 492         }
 493
 494         send_gdb "123\n"
 495         gdb_expect {
 496             -re ".*\[Ww\]atchpoint.*buf\\\[0\\\].*Old value = 0.*New value = 49\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 497             -re ".*\[Ww\]atchpoint.*buf\\\[1\\\].*Old value = 0.*New value = 50\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 498             -re ".*\[Ww\]atchpoint.*buf\\\[2\\\].*Old value = 0.*New value = 51\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 499             -re ".*\[Ww\]atchpoint.*buf\\\[3\\\].*Old value = 0.*New value = 10\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 500             -re ".*$gdb_prompt $" { pass "sent 123" }
 501             timeout { fail "sent 123 (timeout)" }
 502         }
 503
 504         # Examine the values in buf to see how many watchpoints we
 505         # should have printed.
 506         send_gdb "print buf\[0\]\n"
 507         gdb_expect {
 508             -re ".*= 49.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[0\]"}
 509             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[0\]"}
 510             -re ".*$gdb_prompt $" { fail "print buf\[0\]"}
 511             default { fail "print buf\[0\]"}
 512         }
 513         send_gdb "print buf\[1\]\n"
 514         gdb_expect {
 515             -re ".*= 50.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[1\]"}
 516             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[1\]"}
 517             -re ".*$gdb_prompt $" { fail "print buf\[1\]"}
 518             default { fail "print buf\[1\]"}
 519         }
 520         send_gdb "print buf\[2\]\n"
 521         gdb_expect {
 522             -re ".*= 51.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[2\]"}
 523             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[2\]"}
 524             -re ".*$gdb_prompt $" { fail "print buf\[2\]"}
 525             default { fail "print buf\[2\]"}
 526         }
 527         send_gdb "print buf\[3\]\n"
 528         gdb_expect {
 529             -re ".*= 10.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[3\]"}
 530             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[3\]"}
 531             -re ".*$gdb_prompt $" { fail "print buf\[3\]" }
 532             default { fail "print buf\[3\]" }
 533         }
 534
 535         # Did we find what we were looking for?  If not, flunk it.
 536         if [expr $x==$y] then { pass $testname } else { fail "$testname (only triggered $x watchpoints, expected $y)"}
 537
 538         # Continue until we hit the finishing marker function.
 539         # Make sure we hit no more watchpoints.
 540         gdb_test "cont" "Continuing.*Breakpoint.*marker4 \\(\\).*" \
 541             "continue to marker4"
 542
 543         # Disable everything so we can finish the program at full speed
 544         gdb_test "disable" "" "disable in test_watchpoint_triggered_in_syscall"
 545
 546         if [target_info exists gdb,noresults] { return }
 547
 548         gdb_continue_to_end "continue to exit in test_watchpoint_triggered_in_syscall"
 549     }
 550 }
 551
 552 # Do a simple test of of watching through a pointer when the pointer
 553 # itself changes.  Should add some more complicated stuff here.
 554
 555 proc test_complex_watchpoint {} {
 556     global gdb_prompt
 557
 558     if [runto marker4] then {
 559         gdb_test "watch ptr1->val" ".*\[Ww\]atchpoint \[0-9\]*: ptr1->val"
 560         gdb_test "break marker5" ".*Breakpoint.*"
 561
 562         gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ptr1->val.*Old value = 1.*New value = 2.*" "Test complex watchpoint"
 563
 564         # Continue until we hit the marker5 function.
 565         # Make sure we hit no more watchpoints.
 566
 567         gdb_test "cont" "Continuing.*Breakpoint.*marker5 \\(\\).*" \
 568             "did not trigger wrong watchpoint"
 569
 570         # Test watches of things declared locally in a function.
 571         # In particular, test that a watch of stack-based things
 572         # is deleted when the stack-based things go out of scope.
 573         #
 574         gdb_test "disable" "" "disable in test_complex_watchpoint"
 575         gdb_test "break marker6" ".*Breakpoint.*"
 576         gdb_test "cont" "Continuing.*Breakpoint.*marker6 \\(\\).*" \
 577             "continue to marker6"
 578         gdb_test "break func2" ".*Breakpoint.*"
 579         gdb_test "cont" "Continuing.*func2.*"
 580
 581         # Test a watch of a single stack-based variable, whose scope
 582         # is the function we're now in.  This should auto-delete when
 583         # execution exits the scope of the watchpoint.
 584         #
 585         gdb_test "watch local_a" ".*\[Ww\]atchpoint \[0-9\]*: local_a" "set local watch"
 586         gdb_test "cont" "\[Ww\]atchpoint.*local_a.*" "trigger local watch"
 587         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" "self-delete local watch"
 588
 589         gdb_test "cont" "Continuing.*func2.*"
 590         # We should be in "func2" again now.  Test a watch of an
 591         # expression which includes both a stack-based local and
 592         # something whose scope is larger than this invocation
 593         # of "func2".  This should also auto-delete.
 594         #
 595         gdb_test "watch local_a + ival5" ".*\[Ww\]atchpoint \[0-9\]*: local_a . ival5" \
 596                  "set partially local watch"
 597         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
 598                  "trigger1 partially local watch"
 599         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
 600                  "trigger2 partially local watch"
 601         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 602                  "self-delete partially local watch"
 603
 604         # We should be in "func2" again now.  Test a watch of a
 605         # static (non-stack-based) local.  Since this has scope
 606         # across any invocations of "func2", it should not auto-
 607         # delete.
 608         #
 609         gdb_test "cont" "Continuing.*func2.*"
 610         gdb_test "watch static_b" ".*\[Ww\]atchpoint \[0-9\]*: static_b" \
 611                  "set static local watch"
 612         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: static_b.*" \
 613                  "trigger static local watch"
 614         gdb_test "cont" "Continuing.*marker6 \\(\\).*" \
 615                  "continue after trigger static local watch"
 616         gdb_test "info break" ".*watchpoint.*static_b.*" \
 617                  "static local watch did not self-delete"
 618
 619         # We should be in "recurser" now.  Test a watch of a stack-
 620         # based local.  Symbols mentioned in a watchpoint are bound
 621         # at watchpoint-creation.  Thus, a watch of a stack-based
 622         # local to a recursing function should be bound only to that
 623         # one invocation, and should not trigger for other invocations.
 624         #
 625         gdb_test "tbreak recurser" ".*Breakpoint.*"
 626         gdb_test "cont" "Continuing.*recurser.*"
 627         gdb_test "watch local_x" ".*\[Ww\]atchpoint \[0-9\]*: local_x" \
 628                  "set local watch in recursive call"
 629         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_x.*New value = 2.*" \
 630                  "trigger local watch in recursive call"
 631         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 632                  "self-delete local watch in recursive call"
 633
 634         # Disable everything so we can finish the program at full speed
 635         gdb_test "disable" "" "disable in test_complex_watchpoint"
 636
 637         if [target_info exists gdb,noresults] { return }
 638
 639         gdb_continue_to_end "continue to exit in test_complex_watchpoint"
 640     }
 641 }
 642
 643 # Start with a fresh gdb.
 644
 645 gdb_exit
 646 gdb_start
 647 gdb_reinitialize_dir $srcdir/$subdir
 648 gdb_load $binfile
 649 set timeout 600
 650 verbose "Timeout now 600 sec.\n"
 651
 652 if [initialize] then {
 653
 654     test_simple_watchpoint
 655
 656     # The IDT/sim monitor only has 8 (!) open files, of which it uses
 657     # 4 (!).  So we have to make sure one program exits before
 658     # starting another one.
 659     if [istarget "mips-idt-*"] then {
 660         gdb_exit
 661         gdb_start
 662         gdb_reinitialize_dir $srcdir/$subdir
 663         gdb_load $binfile
 664         initialize
 665     }
 666
 667     test_disabling_watchpoints
 668
 669     # See above.
 670     if [istarget "mips-idt-*"] then {
 671         gdb_exit
 672         gdb_start
 673         gdb_reinitialize_dir $srcdir/$subdir
 674         gdb_load $binfile
 675         initialize
 676     }
 677
 678     if ![target_info exists gdb,cannot_call_functions] {
 679         test_stepping
 680
 681         # See above.
 682         if [istarget "mips-idt-*"] then {
 683             gdb_exit
 684             gdb_start
 685             gdb_reinitialize_dir $srcdir/$subdir
 686             gdb_load $binfile
 687             initialize
 688         }
 689     }
 690
 691     # Only enabled for some targets merely because it has not been tested
 692     # elsewhere.
 693     # On sparc-sun-sunos4.1.3, GDB was running all the way to the marker4
 694     # breakpoint before stopping for the watchpoint.  I don't know why.
 695     if {[istarget "hppa*-*-*"]} then {
 696         test_watchpoint_triggered_in_syscall
 697     }
 698
 699     # See above.
 700     if [istarget "mips-idt-*"] then {
 701         gdb_exit
 702         gdb_start
 703         gdb_reinitialize_dir $srcdir/$subdir
 704         gdb_load $binfile
 705         initialize
 706     }
 707
 708     # Only enabled for some targets merely because it has not been tested
 709     # elsewhere.
 710     if {[istarget "hppa*-*-*"] || \
 711             [istarget "sparc*-*-sunos*"] || \
 712             [istarget "m32r-*-*"]} then {
 713         test_complex_watchpoint
 714     }
 715
 716     # Verify that a user can force GDB to use "slow" watchpoints.
 717     # (This proves rather little on kernels that don't support
 718     # fast watchpoints, but still...)
 719     #
 720     if ![runto_main] then { fail "watch tests suppressed" }
 721
 722     send_gdb "set can-use-hw-watchpoints 0\n"
 723     gdb_expect {
 724       -re "$gdb_prompt $"\
 725               {pass "disable fast watches"}
 726       timeout {fail "(timeout) disable fast watches"}
 727     }
 728     send_gdb "show can-use-hw-watchpoints\n"
 729     gdb_expect {
 730       -re "Debugger's willingness to use watchpoint hardware is 0.*$gdb_prompt $"\
 731               {pass "show disable fast watches"}
 732       -re "$gdb_prompt $"\
 733               {fail "show disable fast watches"}
 734       timeout {fail "(timeout) show disable fast watches"}
 735     }
 736     send_gdb "watch ival3 if  count > 1\n"
 737     gdb_expect {
 738       -re "Watchpoint \[0-9\]*: ival3.*$gdb_prompt $"\
 739               {pass "set slow conditional watch"}
 740       -re "$gdb_prompt $"\
 741               {fail "set slow conditional watch"}
 742       timeout {fail "(timeout) set slow conditional watch"}
 743     }
 744     send_gdb "continue\n"
 745     gdb_expect {
 746       -re "Watchpoint \[0-9\]*: ival3.*Old value = 1.*New value = 2.*$gdb_prompt $"\
 747               {pass "trigger slow conditional watch"}
 748       -re "$gdb_prompt $"\
 749               {fail "trigger slow conditional watch"}
 750       timeout {fail "(timeout) trigger slow conditional watch"}
 751     }
 752
 753     # We've explicitly disabled hardware watches.  Verify that GDB
 754     #
 755     #
 756     send_gdb "rwatch ival3\n"
 757     gdb_expect {
 758       -re "Expression cannot be implemented with read/access watchpoint..*$gdb_prompt $"\
 759               {pass "rwatch disallowed when can-set-hw-watchpoints cleared"}
 760       -re "$gdb_prompt $"\
 761               {fail "rwatch disallowed when can-set-hw-watchpoints cleared"}
 762       timeout {fail "(timeout) rwatch disallowed when can-use-hw-watchpoints cleared"}
 763     }
 764
 765     # Read- and access watchpoints are unsupported on HP-UX.  Verify
 766     # that GDB gracefully responds to requests to create them.
 767     #
 768     if [istarget "hppa*-*-hpux*"] then {
 769       send_gdb "set can-use-hw-watchpoints 1\n"
 770       gdb_expect {
 771         -re "$gdb_prompt $"\
 772                 {pass "enable fast watches"}
 773         timeout {fail "(timeout) enable fast watches"}
 774       }
 775       send_gdb "rwatch ival3\n"
 776       gdb_expect {
 777         -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\
 778                 {pass "read watches disallowed"}
 779         -re "$gdb_prompt $"\
 780                 {fail "read watches disallowed"}
 781         timeout {fail "(timeout) read watches disallowed"}
 782       }
 783
 784       send_gdb "awatch ival3\n"
 785       gdb_expect {
 786         -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\
 787                 {pass "access watches disallowed"}
 788         -re "$gdb_prompt $"\
 789                 {fail "access watches disallowed"}
 790         timeout {fail "(timeout) access watches disallowed"}
 791       }
 792     }
 793 }