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     # Disable hardware watchpoints if necessary.
  67     if [target_info exists gdb,no_hardware_watchpoints] {
  68         gdb_test "set can-use-hw-watchpoints 0" "" ""
  69     }
  70
  71     if [gdb_test "break marker1" "Breakpoint 1 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker1" ] {
  72       return 0;
  73     }
  74
  75
  76     if [gdb_test "break marker2" "Breakpoint 2 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker2" ] {
  77       return 0;
  78     }
  79
  80
  81     if [gdb_test "info break" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*" "info break in watchpoint.exp" ] {
  82       return 0;
  83     }
  84
  85
  86     # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint
  87     # before running can cause the inferior to croak on HP-UX 11.0 for
  88     # reasons yet unknown, we've disabled the ability to set watches
  89     # without a running inferior.  Verify the restriction.
  90     #
  91     send_gdb "watch ival3\n"
  92     gdb_expect {
  93         -re ".*\[Ww\]atchpoint 3: ival3.*$gdb_prompt $" {
  94             pass "set watchpoint on ival3"
  95         }
  96         -re "warning: can't do that without a running program; try \"break main\", \"run\" first.*$gdb_prompt $" {
  97             pass "set watchpoint on ival3"
  98             set wp_set 0
  99             return 1
 100         }
 101         timeout {
 102             fail "(timeout) set watchpoint on ival3"
 103             return 0
 104         }
 105     }
 106
 107     # "info watch" is the same as "info break"
 108
 109     if [gdb_test "info watch" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n3\[ \]*.*watchpoint.*ival3" "watchpoint found in watchpoint/breakpoint table" ] {
 110       return 0;
 111     }
 112
 113
 114     # After installing the watchpoint, we disable it until we are ready
 115     # to use it.  This allows the test program to run at full speed until
 116     # we get to the first marker function.
 117
 118     if [gdb_test "disable 3" "disable 3\[\r\n\]+" "disable watchpoint" ] {
 119       return 0;
 120     }
 121
 122
 123     return 1
 124 }
 125
 126 #
 127 # Test simple watchpoint.
 128 #
 129
 130 proc test_simple_watchpoint {} {
 131     global gdb_prompt
 132     global hex
 133     global decimal
 134     global wp_set
 135
 136     # Ensure that the watchpoint is disabled when we startup.
 137
 138     if { $wp_set } {
 139         if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_simple_watchpoint" ] {
 140             return 0;
 141         }
 142     }
 143
 144
 145     # Run until we get to the first marker function.
 146
 147     gdb_run_cmd
 148     set timeout 600
 149     gdb_expect {
 150         -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
 151             pass "run to marker1 in test_simple_watchpoint"
 152         }
 153         -re ".*$gdb_prompt $" {
 154             fail "run to marker1 in test_simple_watchpoint"
 155             return
 156         }
 157         timeout {
 158             fail "run to marker1 in test_simple_watchpoint (timeout)"
 159             return
 160         }
 161     }
 162
 163     if { !$wp_set } {
 164         # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint
 165         # before running can cause the inferior to croak on HP-UX 11.0
 166         # for reasons yet unknown, we've disabled the ability to set
 167         # watches without a running inferior.  The following testpoints used
 168         # to be in [initialize].
 169         #
 170         send_gdb "watch ival3\n"
 171         gdb_expect {
 172             -re ".*\[Ww\]atchpoint 3: ival3\r\n$gdb_prompt $" {
 173                 pass "set watchpoint on ival3"
 174             }
 175             -re ".*$gdb_prompt $" { fail "set watchpoint on ival3"  }
 176             timeout { fail "set watchpoint on ival3 (timeout)"  }
 177         }
 178
 179         set wp_set 1
 180
 181         # "info watch" is the same as "info break"
 182
 183         send_gdb "info watch\n"
 184         gdb_expect {
 185             -re "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n3\[ \]*.*watchpoint.*ival3\r\n$gdb_prompt $" {
 186                 pass "watchpoint found in watchpoint/breakpoint table"
 187             }
 188             -re ".*$gdb_prompt $" {
 189                 fail "watchpoint found in watchpoint/breakpoint table"
 190             }
 191             timeout {
 192                fail "watchpoint found in watchpoint/breakpoint table"
 193             }
 194         }
 195
 196         # After installing the watchpoint, we disable it until we are ready
 197         # to use it.  This allows the test program to run at full speed until
 198         # we get to the first marker function.
 199
 200         send_gdb "disable 3\n"
 201         gdb_expect {
 202             -re "disable 3\[\r\n\]+$gdb_prompt $" { pass "disable watchpoint" }
 203             -re ".*$gdb_prompt $" { fail "disable watchpoint"  }
 204             timeout { fail "disable watchpoint (timeout)"  }
 205         }
 206     }
 207
 208     # After reaching the marker function, enable the watchpoint.
 209
 210     if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "enable watchpoint" ] {
 211       return ;
 212     }
 213
 214
 215     gdb_test "break func1" "Breakpoint.*at.*"
 216     gdb_test "set \$func1_breakpoint_number = \$bpnum" ""
 217
 218     gdb_test "continue" "Continuing.*Breakpoint \[0-9\]*, func1.*" \
 219         "continue to breakpoint at func1"
 220
 221     # Continue until the first change, from -1 to 0
 222
 223     send_gdb "cont\n"
 224     gdb_expect {
 225         -re "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*$gdb_prompt $" {
 226             pass "watchpoint hit, first time"
 227         }
 228         -re "Continuing.*Breakpoint.*func1.*$gdb_prompt $" {
 229             setup_xfail "m68*-*-*" 2597
 230             fail "thought it hit breakpoint at func1 twice"
 231             gdb_test "delete \$func1_breakpoint_number" ""
 232             gdb_test "continue" "\
 233 Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count;" \
 234                 "watchpoint hit, first time"
 235         }
 236         -re ".*$gdb_prompt $" { fail "watchpoint hit, first time" ; return }
 237         timeout { fail "watchpoint hit, first time (timeout)" ; return }
 238         eof { fail "watchpoint hit, first time (eof)" ; return }
 239     }
 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 1 time.*" "Watchpoint hit count is 1"
 243
 244     gdb_test "delete \$func1_breakpoint_number" ""
 245
 246     # Continue until the next change, from 0 to 1.
 247     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit, second time"
 248
 249     # Check that the hit count is reported correctly
 250     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 2 times.*" "Watchpoint hit count is 2"
 251
 252     # Continue until the next change, from 1 to 2.
 253     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 1.*New value = 2.*ival3 = count; ival4 = count;.*" "watchpoint hit, third time"
 254
 255     # Check that the hit count is reported correctly
 256     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 3 times.*" "Watchpoint hit count is 3"
 257
 258     # Continue until the next change, from 2 to 3.
 259     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 2.*New value = 3.*ival3 = count; ival4 = count;.*" "watchpoint hit, fourth 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 4 times.*" "Watchpoint hit count is 4"
 263
 264     # Continue until the next change, from 3 to 4.
 265     # Note that this one is outside the loop.
 266
 267     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 3.*New value = 4.*ival3 = count; ival4 = count;.*" "watchpoint hit, fifth time"
 268
 269     # Check that the hit count is reported correctly
 270     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 5 times.*" "Watchpoint hit count is 5"
 271
 272     # Continue until we hit the finishing marker function.
 273     # Make sure we hit no more watchpoints.
 274
 275     gdb_test "cont" "Continuing.*Breakpoint.*marker2 \(\).*" \
 276         "continue to marker2"
 277
 278     # Disable the watchpoint so we run at full speed until we exit.
 279
 280     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "watchpoint disabled" ] {
 281       return ;
 282     }
 283
 284
 285     # Run until process exits.
 286
 287     if [target_info exists gdb,noresults] { return }
 288
 289     gdb_continue_to_end "continue to exit in test_simple_watchpoint"
 290 }
 291
 292 # Test disabling watchpoints.
 293
 294 proc test_disabling_watchpoints {} {
 295     global gdb_prompt
 296     global binfile
 297     global srcfile
 298     global decimal
 299     global hex
 300
 301     # "info watch" is the same as "info break"
 302     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"
 303
 304     # Ensure that the watchpoint is disabled when we startup.
 305
 306     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_disabling_watchpoints" ] {
 307       return 0;
 308     }
 309
 310
 311     # Run until we get to the first marker function.
 312
 313     gdb_run_cmd
 314     set timeout 600
 315     gdb_expect {
 316         -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
 317             pass "run to marker1 in test_disabling_watchpoints"
 318         }
 319         -re ".*$gdb_prompt $" {
 320             fail "run to marker1 in test_disabling_watchpoints"
 321             return
 322         }
 323         timeout {
 324             fail "run to marker1 in test_disabling_watchpoints (timeout)"
 325             return
 326         }
 327     }
 328
 329     # After reaching the marker function, enable the watchpoint.
 330
 331     if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "watchpoint enabled" ] {
 332       return ;
 333     }
 334
 335
 336     # Continue until the first change, from -1 to 0
 337     # Don't check the old value, because on VxWorks the variable value
 338     # will not have been reinitialized.
 339     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = .*New value = 0.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, first time"
 340
 341     # Continue until the next change, from 0 to 1.
 342     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"
 343
 344     # Disable the watchpoint but leave breakpoints
 345
 346     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint #2 in test_disabling_watchpoints" ] {
 347       return 0;
 348     }
 349
 350
 351     # Check watchpoint list, looking for the entry that confirms the
 352     # watchpoint is disabled.
 353     gdb_test "info watchpoints" "\[0-9]+\[ \]*.*watchpoint\[ \]*keep\[ \]*n\[ \]*ival3\r\n.*" "watchpoint disabled in table"
 354
 355     # Continue until we hit the finishing marker function.
 356     # Make sure we hit no more watchpoints.
 357     gdb_test "cont" "Continuing.*Breakpoint.*marker2 \\(\\).*" \
 358         "disabled watchpoint skipped"
 359
 360     if [target_info exists gdb,noresults] { return }
 361
 362     gdb_continue_to_end "continue to exit in test_disabling_watchpoints"
 363 }
 364
 365 # Test stepping and other mundane operations with watchpoints enabled
 366 proc test_stepping {} {
 367     global gdb_prompt
 368
 369     if [runto marker1] then {
 370         gdb_test "watch ival2" ".*\[Ww\]atchpoint \[0-9\]*: ival2"
 371
 372         # Well, let's not be too mundane.  It should be a *bit* of a challenge
 373         gdb_test "break func2 if 0" "Breakpoint.*at.*"
 374         gdb_test "p \$func2_breakpoint_number = \$bpnum" " = .*"
 375
 376         # The problem is that GDB confuses stepping through the call
 377         # dummy with hitting the breakpoint at the end of the call dummy.
 378         # Will be fixed once all architectures define
 379         # CALL_DUMMY_BREAKPOINT_OFFSET.
 380         setup_xfail "*-*-*"
 381         # This doesn't occur if the call dummy starts with a call,
 382         # because we are out of the dummy by the first time the inferior
 383         # stops.
 384         clear_xfail "arm*-*-*"
 385         clear_xfail "d10v*-*-*"
 386         clear_xfail "m68*-*-*"
 387         clear_xfail "i*86*-*-*"
 388         clear_xfail "vax-*-*"
 389         # The following architectures define CALL_DUMMY_BREAKPOINT_OFFSET.
 390         clear_xfail "alpha-*-*"
 391         clear_xfail "mips*-*-*"
 392         clear_xfail "sparc-*-*"
 393         clear_xfail "hppa*-*-*bsd*"
 394         # It works with the generic inferior function calling code too.
 395         clear_xfail "mn10200*-*-*"
 396         clear_xfail "mn10300*-*-*"
 397         # The following architectures define CALL_DUMMY_HAS_COMPLETED.
 398         clear_xfail "hppa*-*-*hpux*"
 399         gdb_test "p func1 ()" "= 73" \
 400         "calling function with watchpoint enabled"
 401
 402         #
 403         # "finish" brings us back to main.
 404         # On some targets (e.g. alpha) gdb will stop from the finish in midline
 405         # of the marker1 call. This is due to register restoring code on
 406         # the alpha and might be caused by stack adjustment instructions
 407         # on other targets. In this case we will step once more.
 408         #
 409
 410         send_gdb "finish\n"
 411         gdb_expect {
 412             -re "Run.*exit from.*marker1.* at" {
 413                 pass "finish from marker1"
 414             }
 415             default { fail "finish from marker1 (timeout)" ; return }
 416         }
 417
 418         gdb_expect {
 419             -re "marker1 \\(\\);.*$gdb_prompt $" {
 420                 send_gdb "step\n"
 421                 exp_continue
 422             }
 423             -re "func1 \\(\\);.*$gdb_prompt $" {
 424                 pass "back at main from marker1"
 425             }
 426             -re ".*$gdb_prompt $" {
 427                 fail "back at main from marker1"
 428             }
 429             default { fail "back at main from marker1 (timeout)" ; return }
 430         }
 431
 432         gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp"
 433
 434         # Now test that "until" works.  It's a bit tricky to test
 435         # "until", because compilers don't always arrange the code
 436         # exactly the same way, and we might get slightly different
 437         # sequences of statements.  But the following should be true
 438         # (if not it is a compiler or a debugger bug): The user who
 439         # does "until" at every statement of a loop should end up
 440         # stepping through the loop once, and the debugger should not
 441         # stop for any of the remaining iterations.
 442
 443         gdb_test "until" "ival1 = count.*" "until to ival1 assignment"
 444         gdb_test "until" "ival3 = count.*" "until to ival3 assignment"
 445         send_gdb "until\n"
 446         gdb_expect {
 447             -re "(for \\(count = 0|\}).*$gdb_prompt $" {
 448                 gdb_test "until" "ival1 = count; /. Outside loop ./" \
 449                     "until out of loop"
 450             }
 451             -re "ival1 = count; /. Outside loop ./.*$gdb_prompt $" {
 452                 pass "until out of loop"
 453             }
 454             -re ".*$gdb_prompt $" {
 455                 fail "until out of loop"
 456             }
 457             default { fail "until out of loop (timeout)" ; return }
 458         }
 459
 460         gdb_test "step" "ival2 = count.*" "step to ival2 assignment"
 461     }
 462 }
 463
 464 # Test stepping and other mundane operations with watchpoints enabled
 465 proc test_watchpoint_triggered_in_syscall {} {
 466     global gdb_prompt
 467
 468     # These tests won't work without printf support.
 469     if [gdb_skip_stdio_test "watchpoints triggered in syscall"] {
 470         return;
 471     }
 472     # Run until we get to the first marker function.
 473     set x 0
 474     set y 0
 475     set testname "Watch buffer passed to read syscall"
 476     if [runto marker2] then {
 477         gdb_test "watch buf\[0\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[0\\\]"
 478         gdb_test "watch buf\[1\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[1\\\]"
 479         gdb_test "watch buf\[2\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[2\\\]"
 480         gdb_test "watch buf\[3\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[3\\\]"
 481         gdb_test "watch buf\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]"
 482         gdb_test "break marker4" ".*Breakpoint.*"
 483
 484         gdb_test "set doread = 1" ""
 485
 486         # If we send_gdb "123\n" before gdb has switched the tty, then it goes
 487         # to gdb, not the inferior, and we lose.  So that is why we have
 488         # watchpoint.c prompt us, so we can wait for that prompt.
 489         send_gdb "continue\n";
 490         gdb_expect {
 491             -re "Continuing\\.\r\ntype stuff for buf now:" {
 492                 pass "continue to read"
 493             }
 494             default {
 495                 fail "continue to read";
 496                 return ;
 497             }
 498         }
 499
 500         send_gdb "123\n"
 501         gdb_expect {
 502             -re ".*\[Ww\]atchpoint.*buf\\\[0\\\].*Old value = 0.*New value = 49\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 503             -re ".*\[Ww\]atchpoint.*buf\\\[1\\\].*Old value = 0.*New value = 50\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 504             -re ".*\[Ww\]atchpoint.*buf\\\[2\\\].*Old value = 0.*New value = 51\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 505             -re ".*\[Ww\]atchpoint.*buf\\\[3\\\].*Old value = 0.*New value = 10\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 506             -re ".*$gdb_prompt $" { pass "sent 123" }
 507             timeout { fail "sent 123 (timeout)" }
 508         }
 509
 510         # Examine the values in buf to see how many watchpoints we
 511         # should have printed.
 512         send_gdb "print buf\[0\]\n"
 513         gdb_expect {
 514             -re ".*= 49.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[0\]"}
 515             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[0\]"}
 516             -re ".*$gdb_prompt $" { fail "print buf\[0\]"}
 517             default { fail "print buf\[0\]"}
 518         }
 519         send_gdb "print buf\[1\]\n"
 520         gdb_expect {
 521             -re ".*= 50.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[1\]"}
 522             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[1\]"}
 523             -re ".*$gdb_prompt $" { fail "print buf\[1\]"}
 524             default { fail "print buf\[1\]"}
 525         }
 526         send_gdb "print buf\[2\]\n"
 527         gdb_expect {
 528             -re ".*= 51.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[2\]"}
 529             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[2\]"}
 530             -re ".*$gdb_prompt $" { fail "print buf\[2\]"}
 531             default { fail "print buf\[2\]"}
 532         }
 533         send_gdb "print buf\[3\]\n"
 534         gdb_expect {
 535             -re ".*= 10.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[3\]"}
 536             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[3\]"}
 537             -re ".*$gdb_prompt $" { fail "print buf\[3\]" }
 538             default { fail "print buf\[3\]" }
 539         }
 540
 541         # Did we find what we were looking for?  If not, flunk it.
 542         if [expr $x==$y] then { pass $testname } else { fail "$testname (only triggered $x watchpoints, expected $y)"}
 543
 544         # Continue until we hit the finishing marker function.
 545         # Make sure we hit no more watchpoints.
 546         gdb_test "cont" "Continuing.*Breakpoint.*marker4 \\(\\).*" \
 547             "continue to marker4"
 548
 549         # Disable everything so we can finish the program at full speed
 550         gdb_test "disable" "" "disable in test_watchpoint_triggered_in_syscall"
 551
 552         if [target_info exists gdb,noresults] { return }
 553
 554         gdb_continue_to_end "continue to exit in test_watchpoint_triggered_in_syscall"
 555     }
 556 }
 557
 558 # Do a simple test of of watching through a pointer when the pointer
 559 # itself changes.  Should add some more complicated stuff here.
 560
 561 proc test_complex_watchpoint {} {
 562     global gdb_prompt
 563
 564     if [runto marker4] then {
 565         gdb_test "watch ptr1->val" ".*\[Ww\]atchpoint \[0-9\]*: ptr1->val"
 566         gdb_test "break marker5" ".*Breakpoint.*"
 567
 568         gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ptr1->val.*Old value = 1.*New value = 2.*" "Test complex watchpoint"
 569
 570         # Continue until we hit the marker5 function.
 571         # Make sure we hit no more watchpoints.
 572
 573         gdb_test "cont" "Continuing.*Breakpoint.*marker5 \\(\\).*" \
 574             "did not trigger wrong watchpoint"
 575
 576         # Test watches of things declared locally in a function.
 577         # In particular, test that a watch of stack-based things
 578         # is deleted when the stack-based things go out of scope.
 579         #
 580         gdb_test "disable" "" "disable in test_complex_watchpoint"
 581         gdb_test "break marker6" ".*Breakpoint.*"
 582         gdb_test "cont" "Continuing.*Breakpoint.*marker6 \\(\\).*" \
 583             "continue to marker6"
 584         gdb_test "break func2" ".*Breakpoint.*"
 585         gdb_test "cont" "Continuing.*func2.*"
 586
 587         # Test a watch of a single stack-based variable, whose scope
 588         # is the function we're now in.  This should auto-delete when
 589         # execution exits the scope of the watchpoint.
 590         #
 591         gdb_test "watch local_a" ".*\[Ww\]atchpoint \[0-9\]*: local_a" "set local watch"
 592         gdb_test "cont" "\[Ww\]atchpoint.*local_a.*" "trigger local watch"
 593         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" "self-delete local watch"
 594
 595         gdb_test "cont" "Continuing.*func2.*"
 596         # We should be in "func2" again now.  Test a watch of an
 597         # expression which includes both a stack-based local and
 598         # something whose scope is larger than this invocation
 599         # of "func2".  This should also auto-delete.
 600         #
 601         gdb_test "watch local_a + ival5" ".*\[Ww\]atchpoint \[0-9\]*: local_a . ival5" \
 602                  "set partially local watch"
 603         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
 604                  "trigger1 partially local watch"
 605         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
 606                  "trigger2 partially local watch"
 607         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 608                  "self-delete partially local watch"
 609
 610         # We should be in "func2" again now.  Test a watch of a
 611         # static (non-stack-based) local.  Since this has scope
 612         # across any invocations of "func2", it should not auto-
 613         # delete.
 614         #
 615         gdb_test "cont" "Continuing.*func2.*"
 616         gdb_test "watch static_b" ".*\[Ww\]atchpoint \[0-9\]*: static_b" \
 617                  "set static local watch"
 618         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: static_b.*" \
 619                  "trigger static local watch"
 620         gdb_test "cont" "Continuing.*marker6 \\(\\).*" \
 621                  "continue after trigger static local watch"
 622         gdb_test "info break" ".*watchpoint.*static_b.*" \
 623                  "static local watch did not self-delete"
 624
 625         # We should be in "recurser" now.  Test a watch of a stack-
 626         # based local.  Symbols mentioned in a watchpoint are bound
 627         # at watchpoint-creation.  Thus, a watch of a stack-based
 628         # local to a recursing function should be bound only to that
 629         # one invocation, and should not trigger for other invocations.
 630         #
 631         gdb_test "tbreak recurser" ".*Breakpoint.*"
 632         gdb_test "cont" "Continuing.*recurser.*"
 633         gdb_test "watch local_x" ".*\[Ww\]atchpoint \[0-9\]*: local_x" \
 634                  "set local watch in recursive call"
 635         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_x.*New value = 2.*" \
 636                  "trigger local watch in recursive call"
 637         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 638                  "self-delete local watch in recursive call"
 639
 640         # Disable everything so we can finish the program at full speed
 641         gdb_test "disable" "" "disable in test_complex_watchpoint"
 642
 643         if [target_info exists gdb,noresults] { return }
 644
 645         gdb_continue_to_end "continue to exit in test_complex_watchpoint"
 646     }
 647 }
 648
 649 # Start with a fresh gdb.
 650
 651 gdb_exit
 652 gdb_start
 653 gdb_reinitialize_dir $srcdir/$subdir
 654 gdb_load $binfile
 655 set timeout 600
 656 verbose "Timeout now 600 sec.\n"
 657
 658 if [initialize] then {
 659
 660     test_simple_watchpoint
 661
 662     # The IDT/sim monitor only has 8 (!) open files, of which it uses
 663     # 4 (!).  So we have to make sure one program exits before
 664     # starting another one.
 665     if [istarget "mips-idt-*"] then {
 666         gdb_exit
 667         gdb_start
 668         gdb_reinitialize_dir $srcdir/$subdir
 669         gdb_load $binfile
 670         initialize
 671     }
 672
 673     test_disabling_watchpoints
 674
 675     # See above.
 676     if [istarget "mips-idt-*"] then {
 677         gdb_exit
 678         gdb_start
 679         gdb_reinitialize_dir $srcdir/$subdir
 680         gdb_load $binfile
 681         initialize
 682     }
 683
 684     if ![target_info exists gdb,cannot_call_functions] {
 685         test_stepping
 686
 687         # See above.
 688         if [istarget "mips-idt-*"] then {
 689             gdb_exit
 690             gdb_start
 691             gdb_reinitialize_dir $srcdir/$subdir
 692             gdb_load $binfile
 693             initialize
 694         }
 695     }
 696
 697     # Only enabled for some targets merely because it has not been tested
 698     # elsewhere.
 699     # On sparc-sun-sunos4.1.3, GDB was running all the way to the marker4
 700     # breakpoint before stopping for the watchpoint.  I don't know why.
 701     if {[istarget "hppa*-*-*"]} then {
 702         test_watchpoint_triggered_in_syscall
 703     }
 704
 705     # See above.
 706     if [istarget "mips-idt-*"] then {
 707         gdb_exit
 708         gdb_start
 709         gdb_reinitialize_dir $srcdir/$subdir
 710         gdb_load $binfile
 711         initialize
 712     }
 713
 714     # Only enabled for some targets merely because it has not been tested
 715     # elsewhere.
 716     if {[istarget "hppa*-*-*"] || \
 717             [istarget "sparc*-*-sunos*"] || \
 718             [istarget "m32r-*-*"]} then {
 719         test_complex_watchpoint
 720     }
 721
 722     # Verify that a user can force GDB to use "slow" watchpoints.
 723     # (This proves rather little on kernels that don't support
 724     # fast watchpoints, but still...)
 725     #
 726     if ![runto_main] then { fail "watch tests suppressed" }
 727
 728     send_gdb "set can-use-hw-watchpoints 0\n"
 729     gdb_expect {
 730       -re "$gdb_prompt $"\
 731               {pass "disable fast watches"}
 732       timeout {fail "(timeout) disable fast watches"}
 733     }
 734     send_gdb "show can-use-hw-watchpoints\n"
 735     gdb_expect {
 736       -re "Debugger's willingness to use watchpoint hardware is 0.*$gdb_prompt $"\
 737               {pass "show disable fast watches"}
 738       -re "$gdb_prompt $"\
 739               {fail "show disable fast watches"}
 740       timeout {fail "(timeout) show disable fast watches"}
 741     }
 742     send_gdb "watch ival3 if  count > 1\n"
 743     gdb_expect {
 744       -re "Watchpoint \[0-9\]*: ival3.*$gdb_prompt $"\
 745               {pass "set slow conditional watch"}
 746       -re "$gdb_prompt $"\
 747               {fail "set slow conditional watch"}
 748       timeout {fail "(timeout) set slow conditional watch"}
 749     }
 750     send_gdb "continue\n"
 751     gdb_expect {
 752       -re "Watchpoint \[0-9\]*: ival3.*Old value = 1.*New value = 2.*$gdb_prompt $"\
 753               {pass "trigger slow conditional watch"}
 754       -re "$gdb_prompt $"\
 755               {fail "trigger slow conditional watch"}
 756       timeout {fail "(timeout) trigger slow conditional watch"}
 757     }
 758
 759     # We've explicitly disabled hardware watches.  Verify that GDB
 760     #
 761     #
 762     send_gdb "rwatch ival3\n"
 763     gdb_expect {
 764       -re "Expression cannot be implemented with read/access watchpoint..*$gdb_prompt $"\
 765               {pass "rwatch disallowed when can-set-hw-watchpoints cleared"}
 766       -re "$gdb_prompt $"\
 767               {fail "rwatch disallowed when can-set-hw-watchpoints cleared"}
 768       timeout {fail "(timeout) rwatch disallowed when can-use-hw-watchpoints cleared"}
 769     }
 770
 771     # Read- and access watchpoints are unsupported on HP-UX.  Verify
 772     # that GDB gracefully responds to requests to create them.
 773     #
 774     if [istarget "hppa*-*-hpux*"] then {
 775       send_gdb "set can-use-hw-watchpoints 1\n"
 776       gdb_expect {
 777         -re "$gdb_prompt $"\
 778                 {pass "enable fast watches"}
 779         timeout {fail "(timeout) enable fast watches"}
 780       }
 781       send_gdb "rwatch ival3\n"
 782       gdb_expect {
 783         -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\
 784                 {pass "read watches disallowed"}
 785         -re "$gdb_prompt $"\
 786                 {fail "read watches disallowed"}
 787         timeout {fail "(timeout) read watches disallowed"}
 788       }
 789
 790       send_gdb "awatch ival3\n"
 791       gdb_expect {
 792         -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\
 793                 {pass "access watches disallowed"}
 794         -re "$gdb_prompt $"\
 795                 {fail "access watches disallowed"}
 796         timeout {fail "(timeout) access watches disallowed"}
 797       }
 798     }
 799 }