gdb/testsuite/gdb.base/watchpoint.exp

   1 # Copyright 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000
   2 # Free Software Foundation, Inc.
   3
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 2 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program; if not, write to the Free Software
  16 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17
  18 # Please email any bugs, comments, and/or additions to this file to:
  19 # bug-gdb@prep.ai.mit.edu
  20
  21 # This file was written by Fred Fish. (fnf@cygnus.com)
  22
  23 if $tracelevel then {
  24     strace $tracelevel
  25 }
  26
  27 set prms_id 0
  28 set bug_id 0
  29
  30 set testfile "watchpoint"
  31 set srcfile ${testfile}.c
  32 set binfile ${objdir}/${subdir}/${testfile}
  33
  34 set wp_set 1
  35
  36 if [get_compiler_info ${binfile}] {
  37     return -1
  38 }
  39
  40 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  41      gdb_suppress_entire_file "Testcase compile failed, so all tests in this file will automatically fail."
  42 }
  43
  44 # Prepare for watchpoint tests by setting up two breakpoints and one
  45 # watchpoint.
  46 #
  47 # We use breakpoints at marker functions to get past all the startup code,
  48 # so we can get to the watchpoints in a reasonable amount of time from a
  49 # known starting point.
  50 #
  51 # For simplicity, so we always know how to reference specific breakpoints or
  52 # watchpoints by number, we expect a particular ordering and numbering of
  53 # each in the combined breakpoint/watchpoint table, as follows:
  54 #
  55 #       Number          What            Where
  56 #       1               Breakpoint      marker1()
  57 #       2               Breakpoint      marker2()
  58 #       3               Watchpoint      ival3
  59
  60 proc initialize {} {
  61     global gdb_prompt
  62     global hex
  63     global decimal
  64     global srcfile
  65     global wp_set
  66
  67     # Disable hardware watchpoints if necessary.
  68     if [target_info exists gdb,no_hardware_watchpoints] {
  69         gdb_test "set can-use-hw-watchpoints 0" "" ""
  70     }
  71
  72     if [gdb_test "break marker1" "Breakpoint 1 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker1" ] {
  73       return 0;
  74     }
  75
  76
  77     if [gdb_test "break marker2" "Breakpoint 2 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker2" ] {
  78       return 0;
  79     }
  80
  81
  82     if [gdb_test "info break" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*" "info break in watchpoint.exp" ] {
  83       return 0;
  84     }
  85
  86
  87     # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint
  88     # before running can cause the inferior to croak on HP-UX 11.0 for
  89     # reasons yet unknown, we've disabled the ability to set watches
  90     # without a running inferior.  Verify the restriction.
  91     #
  92     send_gdb "watch ival3\n"
  93     gdb_expect {
  94         -re ".*\[Ww\]atchpoint 3: ival3.*$gdb_prompt $" {
  95             pass "set watchpoint on ival3"
  96         }
  97         -re "warning: can't do that without a running program; try \"break main\", \"run\" first.*$gdb_prompt $" {
  98             pass "set watchpoint on ival3"
  99             set wp_set 0
 100             return 1
 101         }
 102         timeout {
 103             fail "(timeout) set watchpoint on ival3"
 104             return 0
 105         }
 106     }
 107
 108     # "info watch" is the same as "info break"
 109
 110     if [gdb_test "info watch" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n3\[ \]*.*watchpoint.*ival3" "watchpoint found in watchpoint/breakpoint table" ] {
 111       return 0;
 112     }
 113
 114
 115     # After installing the watchpoint, we disable it until we are ready
 116     # to use it.  This allows the test program to run at full speed until
 117     # we get to the first marker function.
 118
 119     if [gdb_test "disable 3" "disable 3\[\r\n\]+" "disable watchpoint" ] {
 120       return 0;
 121     }
 122
 123
 124     return 1
 125 }
 126
 127 #
 128 # Test simple watchpoint.
 129 #
 130
 131 proc test_simple_watchpoint {} {
 132     global gdb_prompt
 133     global hex
 134     global decimal
 135     global wp_set
 136
 137     # Ensure that the watchpoint is disabled when we startup.
 138
 139     if { $wp_set } {
 140         if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_simple_watchpoint" ] {
 141             return 0;
 142         }
 143     }
 144
 145
 146     # Run until we get to the first marker function.
 147
 148     gdb_run_cmd
 149     set timeout 600
 150     gdb_expect {
 151         -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
 152             pass "run to marker1 in test_simple_watchpoint"
 153         }
 154         -re ".*$gdb_prompt $" {
 155             fail "run to marker1 in test_simple_watchpoint"
 156             return
 157         }
 158         timeout {
 159             fail "run to marker1 in test_simple_watchpoint (timeout)"
 160             return
 161         }
 162     }
 163
 164     if { !$wp_set } {
 165         # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint
 166         # before running can cause the inferior to croak on HP-UX 11.0
 167         # for reasons yet unknown, we've disabled the ability to set
 168         # watches without a running inferior.  The following testpoints used
 169         # to be in [initialize].
 170         #
 171         send_gdb "watch ival3\n"
 172         gdb_expect {
 173             -re ".*\[Ww\]atchpoint 3: ival3\r\n$gdb_prompt $" {
 174                 pass "set watchpoint on ival3"
 175             }
 176             -re ".*$gdb_prompt $" { fail "set watchpoint on ival3"  }
 177             timeout { fail "set watchpoint on ival3 (timeout)"  }
 178         }
 179
 180         set wp_set 1
 181
 182         # "info watch" is the same as "info break"
 183
 184         send_gdb "info watch\n"
 185         gdb_expect {
 186             -re "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n3\[ \]*.*watchpoint.*ival3\r\n$gdb_prompt $" {
 187                 pass "watchpoint found in watchpoint/breakpoint table"
 188             }
 189             -re ".*$gdb_prompt $" {
 190                 fail "watchpoint found in watchpoint/breakpoint table"
 191             }
 192             timeout {
 193                fail "watchpoint found in watchpoint/breakpoint table"
 194             }
 195         }
 196
 197         # After installing the watchpoint, we disable it until we are ready
 198         # to use it.  This allows the test program to run at full speed until
 199         # we get to the first marker function.
 200
 201         send_gdb "disable 3\n"
 202         gdb_expect {
 203             -re "disable 3\[\r\n\]+$gdb_prompt $" { pass "disable watchpoint" }
 204             -re ".*$gdb_prompt $" { fail "disable watchpoint"  }
 205             timeout { fail "disable watchpoint (timeout)"  }
 206         }
 207     }
 208
 209     # After reaching the marker function, enable the watchpoint.
 210
 211     if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "enable watchpoint" ] {
 212       return ;
 213     }
 214
 215
 216     gdb_test "break func1" "Breakpoint.*at.*"
 217     gdb_test "set \$func1_breakpoint_number = \$bpnum" ""
 218
 219     gdb_test "continue" "Continuing.*Breakpoint \[0-9\]*, func1.*" \
 220         "continue to breakpoint at func1"
 221
 222     # Continue until the first change, from -1 to 0
 223
 224     send_gdb "cont\n"
 225     gdb_expect {
 226         -re "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*$gdb_prompt $" {
 227             pass "watchpoint hit, first time"
 228         }
 229         -re "Continuing.*Breakpoint.*func1.*$gdb_prompt $" {
 230             setup_xfail "m68*-*-*" 2597
 231             fail "thought it hit breakpoint at func1 twice"
 232             gdb_test "delete \$func1_breakpoint_number" ""
 233             gdb_test "continue" "\
 234 Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count;" \
 235                 "watchpoint hit, first time"
 236         }
 237         -re ".*$gdb_prompt $" { fail "watchpoint hit, first time" ; return }
 238         timeout { fail "watchpoint hit, first time (timeout)" ; return }
 239         eof { fail "watchpoint hit, first time (eof)" ; return }
 240     }
 241
 242     # Check that the hit count is reported correctly
 243     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 1 time.*" "Watchpoint hit count is 1"
 244
 245     gdb_test "delete \$func1_breakpoint_number" ""
 246
 247     # Continue until the next change, from 0 to 1.
 248     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit, second 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 2 times.*" "Watchpoint hit count is 2"
 252
 253     # Continue until the next change, from 1 to 2.
 254     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 1.*New value = 2.*ival3 = count; ival4 = count;.*" "watchpoint hit, third 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 3 times.*" "Watchpoint hit count is 3"
 258
 259     # Continue until the next change, from 2 to 3.
 260     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 2.*New value = 3.*ival3 = count; ival4 = count;.*" "watchpoint hit, fourth time"
 261
 262     # Check that the hit count is reported correctly
 263     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 4 times.*" "Watchpoint hit count is 4"
 264
 265     # Continue until the next change, from 3 to 4.
 266     # Note that this one is outside the loop.
 267
 268     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 3.*New value = 4.*ival3 = count; ival4 = count;.*" "watchpoint hit, fifth time"
 269
 270     # Check that the hit count is reported correctly
 271     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 5 times.*" "Watchpoint hit count is 5"
 272
 273     # Continue until we hit the finishing marker function.
 274     # Make sure we hit no more watchpoints.
 275
 276     gdb_test "cont" "Continuing.*Breakpoint.*marker2 \(\).*" \
 277         "continue to marker2"
 278
 279     # Disable the watchpoint so we run at full speed until we exit.
 280
 281     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "watchpoint disabled" ] {
 282       return ;
 283     }
 284
 285
 286     # Run until process exits.
 287
 288     if [target_info exists gdb,noresults] { return }
 289
 290     gdb_continue_to_end "continue to exit in test_simple_watchpoint"
 291 }
 292
 293 # Test disabling watchpoints.
 294
 295 proc test_disabling_watchpoints {} {
 296     global gdb_prompt
 297     global binfile
 298     global srcfile
 299     global decimal
 300     global hex
 301
 302     # "info watch" is the same as "info break"
 303     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"
 304
 305     # Ensure that the watchpoint is disabled when we startup.
 306
 307     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_disabling_watchpoints" ] {
 308       return 0;
 309     }
 310
 311
 312     # Run until we get to the first marker function.
 313
 314     gdb_run_cmd
 315     set timeout 600
 316     gdb_expect {
 317         -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
 318             pass "run to marker1 in test_disabling_watchpoints"
 319         }
 320         -re ".*$gdb_prompt $" {
 321             fail "run to marker1 in test_disabling_watchpoints"
 322             return
 323         }
 324         timeout {
 325             fail "run to marker1 in test_disabling_watchpoints (timeout)"
 326             return
 327         }
 328     }
 329
 330     # After reaching the marker function, enable the watchpoint.
 331
 332     if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "watchpoint enabled" ] {
 333       return ;
 334     }
 335
 336
 337     # Continue until the first change, from -1 to 0
 338     # Don't check the old value, because on VxWorks the variable value
 339     # will not have been reinitialized.
 340     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = .*New value = 0.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, first time"
 341
 342     # Continue until the next change, from 0 to 1.
 343     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"
 344
 345     # Disable the watchpoint but leave breakpoints
 346
 347     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint #2 in test_disabling_watchpoints" ] {
 348       return 0;
 349     }
 350
 351
 352     # Check watchpoint list, looking for the entry that confirms the
 353     # watchpoint is disabled.
 354     gdb_test "info watchpoints" "\[0-9]+\[ \]*.*watchpoint\[ \]*keep\[ \]*n\[ \]*ival3\r\n.*" "watchpoint disabled in table"
 355
 356     # Continue until we hit the finishing marker function.
 357     # Make sure we hit no more watchpoints.
 358     gdb_test "cont" "Continuing.*Breakpoint.*marker2 \\(\\).*" \
 359         "disabled watchpoint skipped"
 360
 361     if [target_info exists gdb,noresults] { return }
 362
 363     gdb_continue_to_end "continue to exit in test_disabling_watchpoints"
 364 }
 365
 366 # Test stepping and other mundane operations with watchpoints enabled
 367 proc test_stepping {} {
 368     global gdb_prompt
 369
 370     if [runto marker1] then {
 371         gdb_test "watch ival2" ".*\[Ww\]atchpoint \[0-9\]*: ival2"
 372
 373         # Well, let's not be too mundane.  It should be a *bit* of a challenge
 374         gdb_test "break func2 if 0" "Breakpoint.*at.*"
 375         gdb_test "p \$func2_breakpoint_number = \$bpnum" " = .*"
 376
 377         # The problem is that GDB confuses stepping through the call
 378         # dummy with hitting the breakpoint at the end of the call dummy.
 379         # Will be fixed once all architectures define
 380         # CALL_DUMMY_BREAKPOINT_OFFSET.
 381         setup_xfail "*-*-*"
 382         # This doesn't occur if the call dummy starts with a call,
 383         # because we are out of the dummy by the first time the inferior
 384         # stops.
 385         clear_xfail "arm*-*-*"
 386         clear_xfail "xscale*-*-*"
 387         clear_xfail "d10v*-*-*"
 388         clear_xfail "m68*-*-*"
 389         clear_xfail "i*86*-*-*"
 390         clear_xfail "vax-*-*"
 391         # The following architectures define CALL_DUMMY_BREAKPOINT_OFFSET.
 392         clear_xfail "alpha-*-*"
 393         clear_xfail "mips*-*-*"
 394         clear_xfail "sparc-*-*"
 395         clear_xfail "hppa*-*-*bsd*"
 396         # It works with the generic inferior function calling code too.
 397         clear_xfail "mn10200*-*-*"
 398         clear_xfail "mn10300*-*-*"
 399         # The following architectures define CALL_DUMMY_HAS_COMPLETED.
 400         clear_xfail "hppa*-*-*hpux*"
 401         gdb_test "p func1 ()" "= 73" \
 402         "calling function with watchpoint enabled"
 403
 404         #
 405         # "finish" brings us back to main.
 406         # On some targets (e.g. alpha) gdb will stop from the finish in midline
 407         # of the marker1 call. This is due to register restoring code on
 408         # the alpha and might be caused by stack adjustment instructions
 409         # on other targets. In this case we will step once more.
 410         #
 411
 412         send_gdb "finish\n"
 413         gdb_expect {
 414             -re "Run.*exit from.*marker1.* at" {
 415                 pass "finish from marker1"
 416             }
 417             default { fail "finish from marker1 (timeout)" ; return }
 418         }
 419
 420         gdb_expect {
 421             -re "marker1 \\(\\);.*$gdb_prompt $" {
 422                 send_gdb "step\n"
 423                 exp_continue
 424             }
 425             -re "func1 \\(\\);.*$gdb_prompt $" {
 426                 pass "back at main from marker1"
 427             }
 428             -re ".*$gdb_prompt $" {
 429                 fail "back at main from marker1"
 430             }
 431             default { fail "back at main from marker1 (timeout)" ; return }
 432         }
 433
 434         gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp"
 435
 436         # Now test that "until" works.  It's a bit tricky to test
 437         # "until", because compilers don't always arrange the code
 438         # exactly the same way, and we might get slightly different
 439         # sequences of statements.  But the following should be true
 440         # (if not it is a compiler or a debugger bug): The user who
 441         # does "until" at every statement of a loop should end up
 442         # stepping through the loop once, and the debugger should not
 443         # stop for any of the remaining iterations.
 444
 445         gdb_test "until" "ival1 = count.*" "until to ival1 assignment"
 446         gdb_test "until" "ival3 = count.*" "until to ival3 assignment"
 447         send_gdb "until\n"
 448         gdb_expect {
 449             -re "(for \\(count = 0|\}).*$gdb_prompt $" {
 450                 gdb_test "until" "ival1 = count; /. Outside loop ./" \
 451                     "until out of loop"
 452             }
 453             -re "ival1 = count; /. Outside loop ./.*$gdb_prompt $" {
 454                 pass "until out of loop"
 455             }
 456             -re ".*$gdb_prompt $" {
 457                 fail "until out of loop"
 458             }
 459             default { fail "until out of loop (timeout)" ; return }
 460         }
 461
 462         gdb_test "step" "ival2 = count.*" "step to ival2 assignment"
 463     }
 464 }
 465
 466 # Test stepping and other mundane operations with watchpoints enabled
 467 proc test_watchpoint_triggered_in_syscall {} {
 468     global gdb_prompt
 469
 470     # These tests won't work without printf support.
 471     if [gdb_skip_stdio_test "watchpoints triggered in syscall"] {
 472         return;
 473     }
 474     # Run until we get to the first marker function.
 475     set x 0
 476     set y 0
 477     set testname "Watch buffer passed to read syscall"
 478     if [runto marker2] then {
 479         gdb_test "watch buf\[0\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[0\\\]"
 480         gdb_test "watch buf\[1\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[1\\\]"
 481         gdb_test "watch buf\[2\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[2\\\]"
 482         gdb_test "watch buf\[3\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[3\\\]"
 483         gdb_test "watch buf\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]"
 484         gdb_test "break marker4" ".*Breakpoint.*"
 485
 486         gdb_test "set doread = 1" ""
 487
 488         # If we send_gdb "123\n" before gdb has switched the tty, then it goes
 489         # to gdb, not the inferior, and we lose.  So that is why we have
 490         # watchpoint.c prompt us, so we can wait for that prompt.
 491         send_gdb "continue\n";
 492         gdb_expect {
 493             -re "Continuing\\.\r\ntype stuff for buf now:" {
 494                 pass "continue to read"
 495             }
 496             default {
 497                 fail "continue to read";
 498                 return ;
 499             }
 500         }
 501
 502         send_gdb "123\n"
 503         gdb_expect {
 504             -re ".*\[Ww\]atchpoint.*buf\\\[0\\\].*Old value = 0.*New value = 49\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 505             -re ".*\[Ww\]atchpoint.*buf\\\[1\\\].*Old value = 0.*New value = 50\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 506             -re ".*\[Ww\]atchpoint.*buf\\\[2\\\].*Old value = 0.*New value = 51\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 507             -re ".*\[Ww\]atchpoint.*buf\\\[3\\\].*Old value = 0.*New value = 10\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 508             -re ".*$gdb_prompt $" { pass "sent 123" }
 509             timeout { fail "sent 123 (timeout)" }
 510         }
 511
 512         # Examine the values in buf to see how many watchpoints we
 513         # should have printed.
 514         send_gdb "print buf\[0\]\n"
 515         gdb_expect {
 516             -re ".*= 49.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[0\]"}
 517             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[0\]"}
 518             -re ".*$gdb_prompt $" { fail "print buf\[0\]"}
 519             default { fail "print buf\[0\]"}
 520         }
 521         send_gdb "print buf\[1\]\n"
 522         gdb_expect {
 523             -re ".*= 50.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[1\]"}
 524             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[1\]"}
 525             -re ".*$gdb_prompt $" { fail "print buf\[1\]"}
 526             default { fail "print buf\[1\]"}
 527         }
 528         send_gdb "print buf\[2\]\n"
 529         gdb_expect {
 530             -re ".*= 51.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[2\]"}
 531             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[2\]"}
 532             -re ".*$gdb_prompt $" { fail "print buf\[2\]"}
 533             default { fail "print buf\[2\]"}
 534         }
 535         send_gdb "print buf\[3\]\n"
 536         gdb_expect {
 537             -re ".*= 10.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[3\]"}
 538             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[3\]"}
 539             -re ".*$gdb_prompt $" { fail "print buf\[3\]" }
 540             default { fail "print buf\[3\]" }
 541         }
 542
 543         # Did we find what we were looking for?  If not, flunk it.
 544         if [expr $x==$y] then { pass $testname } else { fail "$testname (only triggered $x watchpoints, expected $y)"}
 545
 546         # Continue until we hit the finishing marker function.
 547         # Make sure we hit no more watchpoints.
 548         gdb_test "cont" "Continuing.*Breakpoint.*marker4 \\(\\).*" \
 549             "continue to marker4"
 550
 551         # Disable everything so we can finish the program at full speed
 552         gdb_test "disable" "" "disable in test_watchpoint_triggered_in_syscall"
 553
 554         if [target_info exists gdb,noresults] { return }
 555
 556         gdb_continue_to_end "continue to exit in test_watchpoint_triggered_in_syscall"
 557     }
 558 }
 559
 560 # Do a simple test of of watching through a pointer when the pointer
 561 # itself changes.  Should add some more complicated stuff here.
 562
 563 proc test_complex_watchpoint {} {
 564     global gdb_prompt
 565
 566     if [runto marker4] then {
 567         gdb_test "watch ptr1->val" ".*\[Ww\]atchpoint \[0-9\]*: ptr1->val"
 568         gdb_test "break marker5" ".*Breakpoint.*"
 569
 570         gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ptr1->val.*Old value = 1.*New value = 2.*" "Test complex watchpoint"
 571
 572         # Continue until we hit the marker5 function.
 573         # Make sure we hit no more watchpoints.
 574
 575         gdb_test "cont" "Continuing.*Breakpoint.*marker5 \\(\\).*" \
 576             "did not trigger wrong watchpoint"
 577
 578         # Test watches of things declared locally in a function.
 579         # In particular, test that a watch of stack-based things
 580         # is deleted when the stack-based things go out of scope.
 581         #
 582         gdb_test "disable" "" "disable in test_complex_watchpoint"
 583         gdb_test "break marker6" ".*Breakpoint.*"
 584         gdb_test "cont" "Continuing.*Breakpoint.*marker6 \\(\\).*" \
 585             "continue to marker6"
 586         gdb_test "break func2" ".*Breakpoint.*"
 587         gdb_test "cont" "Continuing.*func2.*"
 588
 589         # Test a watch of a single stack-based variable, whose scope
 590         # is the function we're now in.  This should auto-delete when
 591         # execution exits the scope of the watchpoint.
 592         #
 593         gdb_test "watch local_a" ".*\[Ww\]atchpoint \[0-9\]*: local_a" "set local watch"
 594         gdb_test "cont" "\[Ww\]atchpoint.*local_a.*" "trigger local watch"
 595         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" "self-delete local watch"
 596
 597         gdb_test "cont" "Continuing.*func2.*"
 598         # We should be in "func2" again now.  Test a watch of an
 599         # expression which includes both a stack-based local and
 600         # something whose scope is larger than this invocation
 601         # of "func2".  This should also auto-delete.
 602         #
 603         gdb_test "watch local_a + ival5" ".*\[Ww\]atchpoint \[0-9\]*: local_a . ival5" \
 604                  "set partially local watch"
 605         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
 606                  "trigger1 partially local watch"
 607         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
 608                  "trigger2 partially local watch"
 609         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 610                  "self-delete partially local watch"
 611
 612         # We should be in "func2" again now.  Test a watch of a
 613         # static (non-stack-based) local.  Since this has scope
 614         # across any invocations of "func2", it should not auto-
 615         # delete.
 616         #
 617         gdb_test "cont" "Continuing.*func2.*"
 618         gdb_test "watch static_b" ".*\[Ww\]atchpoint \[0-9\]*: static_b" \
 619                  "set static local watch"
 620         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: static_b.*" \
 621                  "trigger static local watch"
 622         gdb_test "cont" "Continuing.*marker6 \\(\\).*" \
 623                  "continue after trigger static local watch"
 624         gdb_test "info break" ".*watchpoint.*static_b.*" \
 625                  "static local watch did not self-delete"
 626
 627         # We should be in "recurser" now.  Test a watch of a stack-
 628         # based local.  Symbols mentioned in a watchpoint are bound
 629         # at watchpoint-creation.  Thus, a watch of a stack-based
 630         # local to a recursing function should be bound only to that
 631         # one invocation, and should not trigger for other invocations.
 632         #
 633         gdb_test "tbreak recurser" ".*Breakpoint.*"
 634         gdb_test "cont" "Continuing.*recurser.*"
 635         gdb_test "watch local_x" ".*\[Ww\]atchpoint \[0-9\]*: local_x" \
 636                  "set local watch in recursive call"
 637         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_x.*New value = 2.*" \
 638                  "trigger local watch in recursive call"
 639         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 640                  "self-delete local watch in recursive call"
 641
 642         # Disable everything so we can finish the program at full speed
 643         gdb_test "disable" "" "disable in test_complex_watchpoint"
 644
 645         if [target_info exists gdb,noresults] { return }
 646
 647         gdb_continue_to_end "continue to exit in test_complex_watchpoint"
 648     }
 649 }
 650
 651 # Start with a fresh gdb.
 652
 653 gdb_exit
 654 gdb_start
 655 gdb_reinitialize_dir $srcdir/$subdir
 656 gdb_load $binfile
 657 set prev_timeout $timeout
 658 set timeout 600
 659 verbose "Timeout now 600 sec.\n"
 660
 661 if [initialize] then {
 662
 663     test_simple_watchpoint
 664
 665     # The IDT/sim monitor only has 8 (!) open files, of which it uses
 666     # 4 (!).  So we have to make sure one program exits before
 667     # starting another one.
 668     if [istarget "mips-idt-*"] then {
 669         gdb_exit
 670         gdb_start
 671         gdb_reinitialize_dir $srcdir/$subdir
 672         gdb_load $binfile
 673         initialize
 674     }
 675
 676     test_disabling_watchpoints
 677
 678     # See above.
 679     if [istarget "mips-idt-*"] then {
 680         gdb_exit
 681         gdb_start
 682         gdb_reinitialize_dir $srcdir/$subdir
 683         gdb_load $binfile
 684         initialize
 685     }
 686
 687     if ![target_info exists gdb,cannot_call_functions] {
 688         test_stepping
 689
 690         # See above.
 691         if [istarget "mips-idt-*"] then {
 692             gdb_exit
 693             gdb_start
 694             gdb_reinitialize_dir $srcdir/$subdir
 695             gdb_load $binfile
 696             initialize
 697         }
 698     }
 699
 700     # Only enabled for some targets merely because it has not been tested
 701     # elsewhere.
 702     # On sparc-sun-sunos4.1.3, GDB was running all the way to the marker4
 703     # breakpoint before stopping for the watchpoint.  I don't know why.
 704     if {[istarget "hppa*-*-*"]} then {
 705         test_watchpoint_triggered_in_syscall
 706     }
 707
 708     # See above.
 709     if [istarget "mips-idt-*"] then {
 710         gdb_exit
 711         gdb_start
 712         gdb_reinitialize_dir $srcdir/$subdir
 713         gdb_load $binfile
 714         initialize
 715     }
 716
 717     # Only enabled for some targets merely because it has not been tested
 718     # elsewhere.
 719     if {[istarget "hppa*-*-*"] || \
 720             [istarget "sparc*-*-sunos*"] || \
 721             [istarget "m32r-*-*"]} then {
 722         test_complex_watchpoint
 723     }
 724
 725     # Verify that a user can force GDB to use "slow" watchpoints.
 726     # (This proves rather little on kernels that don't support
 727     # fast watchpoints, but still...)
 728     #
 729     if ![runto_main] then { fail "watch tests suppressed" }
 730
 731     send_gdb "set can-use-hw-watchpoints 0\n"
 732     gdb_expect {
 733       -re "$gdb_prompt $"\
 734               {pass "disable fast watches"}
 735       timeout {fail "(timeout) disable fast watches"}
 736     }
 737     send_gdb "show can-use-hw-watchpoints\n"
 738     gdb_expect {
 739       -re "Debugger's willingness to use watchpoint hardware is 0.*$gdb_prompt $"\
 740               {pass "show disable fast watches"}
 741       -re "$gdb_prompt $"\
 742               {fail "show disable fast watches"}
 743       timeout {fail "(timeout) show disable fast watches"}
 744     }
 745     send_gdb "watch ival3 if  count > 1\n"
 746     gdb_expect {
 747       -re "Watchpoint \[0-9\]*: ival3.*$gdb_prompt $"\
 748               {pass "set slow conditional watch"}
 749       -re "$gdb_prompt $"\
 750               {fail "set slow conditional watch"}
 751       timeout {fail "(timeout) set slow conditional watch"}
 752     }
 753     send_gdb "continue\n"
 754     gdb_expect {
 755       -re "Watchpoint \[0-9\]*: ival3.*Old value = 1.*New value = 2.*$gdb_prompt $"\
 756               {pass "trigger slow conditional watch"}
 757       -re "$gdb_prompt $"\
 758               {fail "trigger slow conditional watch"}
 759       timeout {fail "(timeout) trigger slow conditional watch"}
 760     }
 761
 762     # We've explicitly disabled hardware watches.  Verify that GDB
 763     #
 764     #
 765     send_gdb "rwatch ival3\n"
 766     gdb_expect {
 767       -re "Expression cannot be implemented with read/access watchpoint..*$gdb_prompt $"\
 768               {pass "rwatch disallowed when can-set-hw-watchpoints cleared"}
 769       -re "$gdb_prompt $"\
 770               {fail "rwatch disallowed when can-set-hw-watchpoints cleared"}
 771       timeout {fail "(timeout) rwatch disallowed when can-use-hw-watchpoints cleared"}
 772     }
 773
 774     # Read- and access watchpoints are unsupported on HP-UX.  Verify
 775     # that GDB gracefully responds to requests to create them.
 776     #
 777     if [istarget "hppa*-*-hpux*"] then {
 778       send_gdb "set can-use-hw-watchpoints 1\n"
 779       gdb_expect {
 780         -re "$gdb_prompt $"\
 781                 {pass "enable fast watches"}
 782         timeout {fail "(timeout) enable fast watches"}
 783       }
 784       send_gdb "rwatch ival3\n"
 785       gdb_expect {
 786         -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\
 787                 {pass "read watches disallowed"}
 788         -re "$gdb_prompt $"\
 789                 {fail "read watches disallowed"}
 790         timeout {fail "(timeout) read watches disallowed"}
 791       }
 792
 793       send_gdb "awatch ival3\n"
 794       gdb_expect {
 795         -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\
 796                 {pass "access watches disallowed"}
 797         -re "$gdb_prompt $"\
 798                 {fail "access watches disallowed"}
 799         timeout {fail "(timeout) access watches disallowed"}
 800       }
 801     }
 802 }
 803
 804 # Restore old timeout
 805 set timeout $prev_timeout
 806 verbose "Timeout now $timeout sec.\n"