gdb/testsuite/gdb.base/watchpoint.exp

   1 # Copyright 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2007, 2008, 2009,
   2 # 2010, 2011 Free Software Foundation, Inc.
   3
   4 # This program is free software; you can redistribute it and/or modify
   5 # it under the terms of the GNU General Public License as published by
   6 # the Free Software Foundation; either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 # This file was written by Fred Fish. (fnf@cygnus.com)
  18
  19 if $tracelevel then {
  20     strace $tracelevel
  21 }
  22
  23
  24 set testfile "watchpoint"
  25 set srcfile ${testfile}.c
  26 set binfile ${objdir}/${subdir}/${testfile}
  27
  28 set wp_set 1
  29
  30 if [get_compiler_info ${binfile}] {
  31     return -1
  32 }
  33
  34 if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
  35      untested watchpoint.exp
  36      return -1
  37 }
  38
  39 # Prepare for watchpoint tests by setting up two breakpoints and one
  40 # watchpoint.
  41 #
  42 # We use breakpoints at marker functions to get past all the startup code,
  43 # so we can get to the watchpoints in a reasonable amount of time from a
  44 # known starting point.
  45 #
  46 # For simplicity, so we always know how to reference specific breakpoints or
  47 # watchpoints by number, we expect a particular ordering and numbering of
  48 # each in the combined breakpoint/watchpoint table, as follows:
  49 #
  50 #       Number          What            Where
  51 #       1               Breakpoint      marker1()
  52 #       2               Breakpoint      marker2()
  53 #       3               Watchpoint      ival3
  54
  55 proc initialize {} {
  56     global gdb_prompt
  57     global hex
  58     global decimal
  59     global srcfile
  60     global wp_set
  61
  62     # Disable hardware watchpoints if necessary.
  63     if [target_info exists gdb,no_hardware_watchpoints] {
  64         gdb_test_no_output "set can-use-hw-watchpoints 0" ""
  65     }
  66
  67     if [gdb_test "break marker1" "Breakpoint 1 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker1" ] {
  68       return 0;
  69     }
  70
  71
  72     if [gdb_test "break marker2" "Breakpoint 2 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker2" ] {
  73       return 0;
  74     }
  75
  76
  77     if [gdb_test "info break" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*" "info break in watchpoint.exp" ] {
  78       return 0;
  79     }
  80
  81
  82     # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint
  83     # before running can cause the inferior to croak on HP-UX 11.0 for
  84     # reasons yet unknown, we've disabled the ability to set watches
  85     # without a running inferior.  Verify the restriction.
  86     #
  87     send_gdb "watch ival3\n"
  88     gdb_expect {
  89         -re ".*\[Ww\]atchpoint 3: ival3.*$gdb_prompt $" {
  90             pass "set watchpoint on ival3"
  91         }
  92         -re "warning: can't do that without a running program; try \"break main\", \"run\" first.*$gdb_prompt $" {
  93             pass "set watchpoint on ival3"
  94             set wp_set 0
  95             return 1
  96         }
  97         timeout {
  98             fail "(timeout) set watchpoint on ival3"
  99             return 0
 100         }
 101     }
 102
 103     if [gdb_test "info watch" "3\[ \]*.*watchpoint.*ival3" "watchpoint found in watchpoint/breakpoint table" ] {
 104       return 0;
 105     }
 106
 107
 108     # After installing the watchpoint, we disable it until we are ready
 109     # to use it.  This allows the test program to run at full speed until
 110     # we get to the first marker function.
 111
 112     if [gdb_test "disable 3" "disable 3\[\r\n\]+" "disable watchpoint" ] {
 113       return 0;
 114     }
 115
 116
 117     return 1
 118 }
 119
 120 #
 121 # Test simple watchpoint.
 122 #
 123
 124 proc test_simple_watchpoint {} {
 125     global gdb_prompt
 126     global hex
 127     global decimal
 128     global wp_set
 129
 130     # Ensure that the watchpoint is disabled when we startup.
 131
 132     if { $wp_set } {
 133         if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_simple_watchpoint" ] {
 134             return 0;
 135         }
 136     }
 137
 138
 139     # Run until we get to the first marker function.
 140
 141     gdb_run_cmd
 142     set timeout 600
 143     gdb_expect {
 144         -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
 145             pass "run to marker1 in test_simple_watchpoint"
 146         }
 147         -re ".*$gdb_prompt $" {
 148             fail "run to marker1 in test_simple_watchpoint"
 149             return
 150         }
 151         timeout {
 152             fail "run to marker1 in test_simple_watchpoint (timeout)"
 153             return
 154         }
 155     }
 156
 157     if { !$wp_set } {
 158         # ??rehrauer: To fix DTS #CHFts23014, in which setting a watchpoint
 159         # before running can cause the inferior to croak on HP-UX 11.0
 160         # for reasons yet unknown, we've disabled the ability to set
 161         # watches without a running inferior.  The following testpoints used
 162         # to be in [initialize].
 163         #
 164         gdb_test "watch ival3" \
 165             "\[Ww\]atchpoint 3: ival3" \
 166             "set watchpoint on ival3"
 167
 168         set wp_set 1
 169
 170         gdb_test "info watch" \
 171             "3\[ \]*.*watchpoint.*ival3" \
 172             "watchpoint found in watchpoint/breakpoint table"
 173
 174         # After installing the watchpoint, we disable it until we are ready
 175         # to use it.  This allows the test program to run at full speed until
 176         # we get to the first marker function.
 177
 178         gdb_test "disable 3" "disable 3" "disable watchpoint"
 179     }
 180
 181     # After reaching the marker function, enable the watchpoint.
 182
 183     if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "enable watchpoint" ] {
 184       return ;
 185     }
 186
 187
 188     gdb_test "break func1" "Breakpoint.*at.*"
 189     gdb_test_no_output "set \$func1_breakpoint_number = \$bpnum"
 190
 191     gdb_test "continue" "Continuing.*Breakpoint \[0-9\]*, func1.*" \
 192         "continue to breakpoint at func1"
 193
 194     # Continue until the first change, from -1 to 0
 195
 196     send_gdb "cont\n"
 197     gdb_expect {
 198         -re "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*$gdb_prompt $" {
 199             pass "watchpoint hit, first time"
 200         }
 201         -re "Continuing.*Breakpoint.*func1.*$gdb_prompt $" {
 202             setup_xfail "m68*-*-*" 2597
 203             fail "thought it hit breakpoint at func1 twice"
 204             gdb_test_no_output "delete \$func1_breakpoint_number"
 205             gdb_test "continue" "\
 206 Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count;" \
 207                 "watchpoint hit, first time"
 208         }
 209         -re ".*$gdb_prompt $" { fail "watchpoint hit, first time" ; return }
 210         timeout { fail "watchpoint hit, first time (timeout)" ; return }
 211         eof { fail "watchpoint hit, first time (eof)" ; return }
 212     }
 213
 214     # Check that the hit count is reported correctly
 215     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 1 time.*" "Watchpoint hit count is 1"
 216
 217     gdb_test_no_output "delete \$func1_breakpoint_number"
 218
 219     # Continue until the next change, from 0 to 1.
 220     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit, second time"
 221
 222     # Check that the hit count is reported correctly
 223     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 2 times.*" "Watchpoint hit count is 2"
 224
 225     # Continue until the next change, from 1 to 2.
 226     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 1.*New value = 2.*ival3 = count; ival4 = count;.*" "watchpoint hit, third time"
 227
 228     # Check that the hit count is reported correctly
 229     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 3 times.*" "Watchpoint hit count is 3"
 230
 231     # Continue until the next change, from 2 to 3.
 232     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 2.*New value = 3.*ival3 = count; ival4 = count;.*" "watchpoint hit, fourth time"
 233
 234     # Check that the hit count is reported correctly
 235     gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 4 times.*" "Watchpoint hit count is 4"
 236
 237     # Continue until the next change, from 3 to 4.
 238     # Note that this one is outside the loop.
 239
 240     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 3.*New value = 4.*ival3 = count; ival4 = count;.*" "watchpoint hit, fifth time"
 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 5 times.*" "Watchpoint hit count is 5"
 244
 245     # Continue until we hit the finishing marker function.
 246     # Make sure we hit no more watchpoints.
 247
 248     gdb_test "cont" "Continuing.*Breakpoint.*marker2 \(\).*" \
 249         "continue to marker2"
 250
 251     # Disable the watchpoint so we run at full speed until we exit.
 252
 253     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "watchpoint disabled" ] {
 254       return ;
 255     }
 256
 257
 258     # Run until process exits.
 259
 260     if [target_info exists gdb,noresults] { return }
 261
 262     gdb_continue_to_end "continue to exit in test_simple_watchpoint"
 263 }
 264
 265 # Test disabling watchpoints.
 266
 267 proc test_disabling_watchpoints {} {
 268     global gdb_prompt
 269     global binfile
 270     global srcfile
 271     global decimal
 272     global hex
 273
 274     # "info watch" is the same as "info break"
 275     gdb_test "info watch" "\[0-9]+\[ \]*.*watchpoint.*ival3\r\n\.*\[0-9\]+ times.*" "watchpoints found in watchpoint/breakpoint table"
 276
 277     # Ensure that the watchpoint is disabled when we startup.
 278
 279     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_disabling_watchpoints" ] {
 280       return 0;
 281     }
 282
 283
 284     # Run until we get to the first marker function.
 285
 286     gdb_run_cmd
 287     set timeout 600
 288     gdb_expect {
 289         -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
 290             pass "run to marker1 in test_disabling_watchpoints"
 291         }
 292         -re ".*$gdb_prompt $" {
 293             fail "run to marker1 in test_disabling_watchpoints"
 294             return
 295         }
 296         timeout {
 297             fail "run to marker1 in test_disabling_watchpoints (timeout)"
 298             return
 299         }
 300     }
 301
 302     # After reaching the marker function, enable the watchpoint.
 303
 304     if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "watchpoint enabled" ] {
 305       return ;
 306     }
 307
 308
 309     # Continue until the first change, from -1 to 0
 310     # Don't check the old value, because on VxWorks the variable value
 311     # will not have been reinitialized.
 312     gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = .*New value = 0.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, first time"
 313
 314     # Continue until the next change, from 0 to 1.
 315     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"
 316
 317     # Disable the watchpoint but leave breakpoints
 318
 319     if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint #2 in test_disabling_watchpoints" ] {
 320       return 0;
 321     }
 322
 323
 324     # Check watchpoint list, looking for the entry that confirms the
 325     # watchpoint is disabled.
 326     gdb_test "info watchpoints" "\[0-9]+\[ \]*.*watchpoint\[ \]*keep\[ \]*n\[ \]*ival3\r\n.*" "watchpoint disabled in table"
 327
 328     # Continue until we hit the finishing marker function.
 329     # Make sure we hit no more watchpoints.
 330     gdb_test "cont" "Continuing.*Breakpoint.*marker2 \\(\\).*" \
 331         "disabled watchpoint skipped"
 332
 333     if [target_info exists gdb,noresults] { return }
 334
 335     gdb_continue_to_end "continue to exit in test_disabling_watchpoints"
 336 }
 337
 338 # Test stepping and other mundane operations with watchpoints enabled
 339 proc test_stepping {} {
 340     global gdb_prompt
 341
 342     if [runto marker1] then {
 343         gdb_test "watch ival2" ".*\[Ww\]atchpoint \[0-9\]*: ival2"
 344
 345         # Well, let's not be too mundane.  It should be a *bit* of a challenge
 346         gdb_test "break func2 if 0" "Breakpoint.*at.*"
 347         gdb_test "p \$func2_breakpoint_number = \$bpnum" " = .*"
 348
 349         gdb_test "p func1 ()" "= 73" \
 350             "calling function with watchpoint enabled"
 351
 352         #
 353         # "finish" brings us back to main.
 354         # On some targets (e.g. alpha) gdb will stop from the finish in midline
 355         # of the marker1 call. This is due to register restoring code on
 356         # the alpha and might be caused by stack adjustment instructions
 357         # on other targets. In this case we will step once more.
 358         #
 359
 360         send_gdb "finish\n"
 361         gdb_expect {
 362             -re "Run.*exit from.*marker1.* at" {
 363                 pass "finish from marker1"
 364             }
 365             default { fail "finish from marker1 (timeout)" ; return }
 366         }
 367
 368         gdb_expect {
 369             -re "marker1 \\(\\);.*$gdb_prompt $" {
 370                 send_gdb "step\n"
 371                 exp_continue
 372             }
 373             -re "func1 \\(\\);.*$gdb_prompt $" {
 374                 pass "back at main from marker1"
 375             }
 376             -re ".*$gdb_prompt $" {
 377                 fail "back at main from marker1"
 378             }
 379             default { fail "back at main from marker1 (timeout)" ; return }
 380         }
 381
 382         gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp"
 383
 384         # Now test that "until" works.  It's a bit tricky to test
 385         # "until", because compilers don't always arrange the code
 386         # exactly the same way, and we might get slightly different
 387         # sequences of statements.  But the following should be true
 388         # (if not it is a compiler or a debugger bug): The user who
 389         # does "until" at every statement of a loop should end up
 390         # stepping through the loop once, and the debugger should not
 391         # stop for any of the remaining iterations.
 392
 393         gdb_test "until" "ival1 = count.*" "until to ival1 assignment"
 394         gdb_test "until" "ival3 = count.*" "until to ival3 assignment"
 395         send_gdb "until\n"
 396         gdb_expect {
 397             -re "(for \\(count = 0|\}).*$gdb_prompt $" {
 398                 gdb_test "until" "ival1 = count; /. Outside loop ./" \
 399                     "until out of loop"
 400             }
 401             -re "ival1 = count; /. Outside loop ./.*$gdb_prompt $" {
 402                 pass "until out of loop"
 403             }
 404             -re ".*$gdb_prompt $" {
 405                 fail "until out of loop"
 406             }
 407             default { fail "until out of loop (timeout)" ; return }
 408         }
 409
 410         gdb_test "step" "ival2 = count.*" "step to ival2 assignment"
 411     }
 412 }
 413
 414 # Test stepping and other mundane operations with watchpoints enabled
 415 proc test_watchpoint_triggered_in_syscall {} {
 416     global gdb_prompt
 417
 418     # These tests won't work without printf support.
 419     if [gdb_skip_stdio_test "watchpoints triggered in syscall"] {
 420         return;
 421     }
 422     # Run until we get to the first marker function.
 423     set x 0
 424     set y 0
 425     set testname "Watch buffer passed to read syscall"
 426     if [runto marker2] then {
 427         gdb_test "watch buf\[0\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[0\\\]"
 428         gdb_test "watch buf\[1\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[1\\\]"
 429         gdb_test "watch buf\[2\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[2\\\]"
 430         gdb_test "watch buf\[3\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[3\\\]"
 431         gdb_test "watch buf\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]"
 432         gdb_test "break marker4" ".*Breakpoint.*"
 433
 434         gdb_test_no_output "set doread = 1"
 435
 436         # If we send_gdb "123\n" before gdb has switched the tty, then it goes
 437         # to gdb, not the inferior, and we lose.  So that is why we have
 438         # watchpoint.c prompt us, so we can wait for that prompt.
 439
 440         send_gdb "continue\n";
 441         gdb_expect {
 442             -re "Continuing\\.\r\ntype stuff for buf now:" {
 443                 pass "continue to read"
 444             }
 445             default {
 446                 fail "continue to read";
 447                 return ;
 448             }
 449         }
 450
 451         send_gdb "123\n"
 452         gdb_expect {
 453             -re ".*\[Ww\]atchpoint.*buf\\\[0\\\].*Old value = 0.*New value = 49\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 454             -re ".*\[Ww\]atchpoint.*buf\\\[1\\\].*Old value = 0.*New value = 50\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 455             -re ".*\[Ww\]atchpoint.*buf\\\[2\\\].*Old value = 0.*New value = 51\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 456             -re ".*\[Ww\]atchpoint.*buf\\\[3\\\].*Old value = 0.*New value = 10\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
 457             -re ".*$gdb_prompt $" { pass "sent 123" }
 458             timeout { fail "sent 123 (timeout)" }
 459         }
 460
 461         # Examine the values in buf to see how many watchpoints we
 462         # should have printed.
 463         send_gdb "print buf\[0\]\n"
 464         gdb_expect {
 465             -re ".*= 49.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[0\]"}
 466             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[0\]"}
 467             -re ".*$gdb_prompt $" { fail "print buf\[0\]"}
 468             default { fail "print buf\[0\]"}
 469         }
 470         send_gdb "print buf\[1\]\n"
 471         gdb_expect {
 472             -re ".*= 50.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[1\]"}
 473             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[1\]"}
 474             -re ".*$gdb_prompt $" { fail "print buf\[1\]"}
 475             default { fail "print buf\[1\]"}
 476         }
 477         send_gdb "print buf\[2\]\n"
 478         gdb_expect {
 479             -re ".*= 51.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[2\]"}
 480             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[2\]"}
 481             -re ".*$gdb_prompt $" { fail "print buf\[2\]"}
 482             default { fail "print buf\[2\]"}
 483         }
 484         send_gdb "print buf\[3\]\n"
 485         gdb_expect {
 486             -re ".*= 10.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[3\]"}
 487             -re ".*= 0.*$gdb_prompt $" { pass "print buf\[3\]"}
 488             -re ".*$gdb_prompt $" { fail "print buf\[3\]" }
 489             default { fail "print buf\[3\]" }
 490         }
 491
 492         # Did we find what we were looking for?  If not, flunk it.
 493         if [expr $x==$y] then { pass $testname } else { fail "$testname (only triggered $x watchpoints, expected $y)"}
 494
 495         # Continue until we hit the finishing marker function.
 496         # Make sure we hit no more watchpoints.
 497         gdb_test "cont" "Continuing.*Breakpoint.*marker4 \\(\\).*" \
 498             "continue to marker4"
 499
 500         # Disable everything so we can finish the program at full speed
 501         gdb_test_no_output "disable" "disable in test_watchpoint_triggered_in_syscall"
 502
 503         if [target_info exists gdb,noresults] { return }
 504
 505         gdb_continue_to_end "continue to exit in test_watchpoint_triggered_in_syscall"
 506     }
 507 }
 508
 509 # Do a simple test of of watching through a pointer when the pointer
 510 # itself changes.  Should add some more complicated stuff here.
 511
 512 proc test_complex_watchpoint {} {
 513     global gdb_prompt
 514
 515     if [runto marker4] then {
 516         gdb_test "watch ptr1->val" ".*\[Ww\]atchpoint \[0-9\]*: ptr1->val"
 517         gdb_test "break marker5" ".*Breakpoint.*"
 518
 519         gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ptr1->val.*Old value = 1.*New value = 2.*" "Test complex watchpoint"
 520
 521         # Continue until we hit the marker5 function.
 522         # Make sure we hit no more watchpoints.
 523
 524         gdb_test "cont" "Continuing.*Breakpoint.*marker5 \\(\\).*" \
 525             "did not trigger wrong watchpoint"
 526
 527         # Test watches of things declared locally in a function.
 528         # In particular, test that a watch of stack-based things
 529         # is deleted when the stack-based things go out of scope.
 530         #
 531         gdb_test_no_output "disable" "disable in test_complex_watchpoint"
 532         gdb_test "break marker6" ".*Breakpoint.*"
 533         gdb_test "cont" "Continuing.*Breakpoint.*marker6 \\(\\).*" \
 534             "continue to marker6"
 535         gdb_test "break func2" ".*Breakpoint.*"
 536         gdb_test "cont" "Continuing.*func2.*"
 537
 538         # Test a watch of a single stack-based variable, whose scope
 539         # is the function we're now in.  This should auto-delete when
 540         # execution exits the scope of the watchpoint.
 541         #
 542         gdb_test "watch local_a" ".*\[Ww\]atchpoint \[0-9\]*: local_a" "set local watch"
 543         gdb_test "cont" "\[Ww\]atchpoint.*local_a.*" "trigger local watch"
 544         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" "self-delete local watch"
 545
 546         gdb_test "cont" "Continuing.*func2.*"
 547         # We should be in "func2" again now.  Test a watch of an
 548         # expression which includes both a stack-based local and
 549         # something whose scope is larger than this invocation
 550         # of "func2".  This should also auto-delete.
 551         #
 552         gdb_test "watch local_a + ival5" ".*\[Ww\]atchpoint \[0-9\]*: local_a . ival5" \
 553                  "set partially local watch"
 554         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
 555                  "trigger1 partially local watch"
 556         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
 557                  "trigger2 partially local watch"
 558         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 559                  "self-delete partially local watch"
 560
 561         # We should be in "func2" again now.  Test a watch of a
 562         # static (non-stack-based) local.  Since this has scope
 563         # across any invocations of "func2", it should not auto-
 564         # delete.
 565         #
 566         gdb_test "cont" "Continuing.*func2.*"
 567         gdb_test "watch static_b" ".*\[Ww\]atchpoint \[0-9\]*: static_b" \
 568                  "set static local watch"
 569         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: static_b.*" \
 570                  "trigger static local watch"
 571         gdb_test "cont" "Continuing.*marker6 \\(\\).*" \
 572                  "continue after trigger static local watch"
 573         gdb_test "info break" ".*watchpoint.*static_b.*" \
 574                  "static local watch did not self-delete"
 575
 576         # We should be in "recurser" now.  Test a watch of a stack-
 577         # based local.  Symbols mentioned in a watchpoint are bound
 578         # at watchpoint-creation.  Thus, a watch of a stack-based
 579         # local to a recursing function should be bound only to that
 580         # one invocation, and should not trigger for other invocations.
 581         #
 582         gdb_test "tbreak recurser" ".*breakpoint.*"
 583         gdb_test "cont" "Continuing.*recurser.*"
 584         gdb_test "watch local_x" ".*\[Ww\]atchpoint \[0-9\]*: local_x" \
 585                  "set local watch in recursive call"
 586         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_x.*New value = 2.*" \
 587                  "trigger local watch in recursive call"
 588         gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
 589                  "self-delete local watch in recursive call"
 590
 591         # Disable everything so we can finish the program at full speed
 592         gdb_test_no_output "disable" "disable in test_complex_watchpoint"
 593
 594         if [target_info exists gdb,noresults] { return }
 595
 596         gdb_continue_to_end "continue to exit in test_complex_watchpoint"
 597     }
 598 }
 599
 600 proc test_watchpoint_and_breakpoint {} {
 601     global gdb_prompt
 602
 603     # This is a test for PR gdb/38, which involves setting a
 604     # watchpoint right after you've reached a breakpoint.
 605
 606     if [runto func3] then {
 607         gdb_breakpoint [gdb_get_line_number "second x assignment"]
 608         gdb_continue_to_breakpoint "second x assignment"
 609         gdb_test "watch x" ".*atchpoint \[0-9\]+: x"
 610         gdb_test_multiple "next" "next after watch x" {
 611             -re ".*atchpoint \[0-9\]+: x\r\n\r\nOld value = 0\r\nNew value = 1\r\n.*$gdb_prompt $" {
 612                 pass "next after watch x"
 613             }
 614             -re "\[0-9\]+\[\t \]+y = 1;\r\n$gdb_prompt $" {
 615                 kfail "gdb/38" "next after watch x"
 616             }
 617         }
 618
 619         gdb_test_no_output "delete \$bpnum" "delete watch x"
 620     }
 621 }
 622
 623 proc test_constant_watchpoint {} {
 624     gdb_test "watch 5" "Cannot watch constant value `5'." "number is constant"
 625     gdb_test "watch marker1" "Cannot watch constant value `marker1'." \
 626     "marker1 is constant"
 627     gdb_test "watch count + 6" ".*atchpoint \[0-9\]+: count \\+ 6"
 628     gdb_test_no_output "delete \$bpnum" "delete watchpoint `count + 6'"
 629     gdb_test "watch 7 + count" ".*atchpoint \[0-9\]+: 7 \\+ count"
 630     gdb_test_no_output "delete \$bpnum" "delete watchpoint `7 + count'"
 631 }
 632
 633 proc test_watch_location {} {
 634     gdb_breakpoint [gdb_get_line_number "func5 breakpoint here"]
 635     gdb_continue_to_breakpoint "func5 breakpoint here"
 636
 637     gdb_test "watch -location *x" "atchpoint .*: .*" "watch -location .x"
 638
 639     gdb_test "continue" \
 640         "Continuing.*\[Ww\]atchpoint .*: .*New value = 27.*" \
 641         "continue with watch -location"
 642
 643     gdb_test_no_output "delete \$bpnum" "delete watch -location"
 644 }
 645
 646 proc test_inaccessible_watchpoint {} {
 647     global gdb_prompt
 648
 649     # This is a test for watchpoints on currently inaccessible (but later
 650     # valid) memory.
 651
 652     if [runto func4] then {
 653         # Make sure we only allow memory access errors.
 654         set msg "watchpoint refused to insert on nonexistent struct member"
 655         gdb_test_multiple "watch struct1.nosuchmember" $msg {
 656             -re ".*atchpoint \[0-9\]+: struct1.nosuchmember.*$gdb_prompt $" {
 657                 # PR breakpoints/9681
 658                 fail $msg
 659             }
 660             -re "There is no member named nosuchmember\\..*$gdb_prompt $" {
 661                 pass $msg
 662             }
 663         }
 664
 665         # See whether a watchpoint on a normal variable is a hardware
 666         # watchpoint or not.  The watchpoints on NULL should be hardware
 667         # iff this one is.
 668         set watchpoint_msg "Watchpoint"
 669         gdb_test_multiple "watch global_ptr" "watch global_ptr" {
 670             -re "Watchpoint \[0-9\]+: global_ptr\r\n.*$gdb_prompt $" {
 671                 pass "watch global_ptr"
 672             }
 673             -re "Hardware watchpoint \[0-9\]+: global_ptr\r\n.*$gdb_prompt $" {
 674                 set watchpoint_msg "Hardware watchpoint"
 675                 pass "watch global_ptr"
 676             }
 677         }
 678         delete_breakpoints
 679
 680         # Make sure that we can watch a constant address, and correctly
 681         # use a HW watchpoint if supported.
 682         gdb_test "watch *(int *) 0" \
 683             "$watchpoint_msg \[0-9\]+: \\*\\(int \\*\\) 0"
 684         delete_breakpoints
 685
 686         # The same, but using -location through an indirection.
 687         gdb_test "watch -location *global_ptr" \
 688             "$watchpoint_msg \[0-9\]+: \-location: \\*global_ptr"
 689         delete_breakpoints
 690
 691         # This step requires two HW watchpoints.  Since PPC Server only has
 692         # a single one, it will use a SW watchpoint in this case.
 693         if [istarget powerpc64-*] {
 694             set watchpoint_msg "Watchpoint"
 695         }
 696
 697         gdb_test "watch *global_ptr" "$watchpoint_msg \[0-9\]+: \\\*global_ptr"
 698         gdb_test "set \$global_ptr_breakpoint_number = \$bpnum" ""
 699         gdb_test "next" ".*global_ptr = buf.*" "global_ptr next"
 700         gdb_test_multiple "next" "next over ptr init" {
 701             -re ".*atchpoint \[0-9\]+: \\*global_ptr\r\n\r\nOld value = .*\r\nNew value = 3 .*\r\n.*$gdb_prompt $" {
 702                 # We can not test for <unknown> here because NULL may be readable.
 703                 # This test does rely on *NULL != 3.
 704                 pass "next over ptr init"
 705             }
 706         }
 707         gdb_test_multiple "next" "next over buffer set" {
 708             -re ".*atchpoint \[0-9\]+: \\*global_ptr\r\n\r\nOld value = 3 .*\r\nNew value = 7 .*\r\n.*$gdb_prompt $" {
 709                 pass "next over buffer set"
 710             }
 711         }
 712         gdb_test "delete \$global_ptr_breakpoint_number" ""
 713         gdb_test "watch **global_ptr_ptr" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr"
 714         gdb_test "set \$global_ptr_ptr_breakpoint_number = \$bpnum" ""
 715         gdb_test "next" ".*global_ptr_ptr = &global_ptr.*" "gloabl_ptr_ptr next"
 716         gdb_test "next" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr\[\r\n\]+Old value = .*\r\nNew value = 7 .*" "next over global_ptr_ptr init"
 717         gdb_test "next" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr\[\r\n\]+Old value = 7 .*\r\nNew value = 9 .*" "next over global_ptr_ptr buffer set"
 718         gdb_test "next" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr\[\r\n\]+Old value = 9 .*\r\nNew value = 5 .*" "next over global_ptr_ptr pointer advance"
 719         gdb_test_no_output "delete \$global_ptr_ptr_breakpoint_number"
 720     }
 721 }
 722
 723 proc test_watchpoint_in_big_blob {} {
 724     global gdb_prompt
 725
 726     gdb_test "watch buf" ".*atchpoint \[0-9\]+: buf"
 727     gdb_test "cont" "Continuing.*atchpoint \[0-9\]+: buf\r\n\r\nOld value = .*testte\".*" "watchpoint on buf hit"
 728
 729     gdb_test_no_output "delete \$bpnum" "delete watch buf"
 730 }
 731
 732 # Start with a fresh gdb.
 733
 734 gdb_exit
 735 gdb_start
 736 gdb_reinitialize_dir $srcdir/$subdir
 737 gdb_load $binfile
 738 set prev_timeout $timeout
 739 set timeout 600
 740 verbose "Timeout now 600 sec.\n"
 741
 742 if [initialize] then {
 743
 744     test_simple_watchpoint
 745
 746     # The IDT/sim monitor only has 8 (!) open files, of which it uses
 747     # 4 (!).  So we have to make sure one program exits before
 748     # starting another one.
 749     if [istarget "mips-idt-*"] then {
 750         gdb_exit
 751         gdb_start
 752         gdb_reinitialize_dir $srcdir/$subdir
 753         gdb_load $binfile
 754         initialize
 755     }
 756
 757     test_disabling_watchpoints
 758
 759     # See above.
 760     if [istarget "mips-idt-*"] then {
 761         gdb_exit
 762         gdb_start
 763         gdb_reinitialize_dir $srcdir/$subdir
 764         gdb_load $binfile
 765         initialize
 766     }
 767
 768     if ![target_info exists gdb,cannot_call_functions] {
 769         test_stepping
 770
 771         # See above.
 772         if [istarget "mips-idt-*"] then {
 773             gdb_exit
 774             gdb_start
 775             gdb_reinitialize_dir $srcdir/$subdir
 776             gdb_load $binfile
 777             initialize
 778         }
 779     }
 780
 781     # Only enabled for some targets merely because it has not been tested
 782     # elsewhere.
 783     # On sparc-sun-sunos4.1.3, GDB was running all the way to the marker4
 784     # breakpoint before stopping for the watchpoint.  I don't know why.
 785     if {[istarget "hppa*-*-*"]} then {
 786         test_watchpoint_triggered_in_syscall
 787     }
 788
 789     # See above.
 790     if [istarget "mips-idt-*"] then {
 791         gdb_exit
 792         gdb_start
 793         gdb_reinitialize_dir $srcdir/$subdir
 794         gdb_load $binfile
 795         initialize
 796     }
 797
 798     # Only enabled for some targets merely because it has not been tested
 799     # elsewhere.
 800     if {[istarget "hppa*-*-*"] || \
 801             [istarget "sparc*-*-sunos*"] || \
 802             [istarget "m32r-*-*"]} then {
 803         test_complex_watchpoint
 804     }
 805
 806     test_inaccessible_watchpoint
 807
 808     # Verify that a user can force GDB to use "slow" watchpoints.
 809     # (This proves rather little on kernels that don't support
 810     # fast watchpoints, but still...)
 811     #
 812     if ![runto_main] then { fail "watch tests suppressed" }
 813
 814     send_gdb "set can-use-hw-watchpoints 0\n"
 815     gdb_expect {
 816       -re "$gdb_prompt $"\
 817               {pass "disable fast watches"}
 818       timeout {fail "(timeout) disable fast watches"}
 819     }
 820     send_gdb "show can-use-hw-watchpoints\n"
 821     gdb_expect {
 822       -re "Debugger's willingness to use watchpoint hardware is 0.*$gdb_prompt $"\
 823               {pass "show disable fast watches"}
 824       -re "$gdb_prompt $"\
 825               {fail "show disable fast watches"}
 826       timeout {fail "(timeout) show disable fast watches"}
 827     }
 828     send_gdb "watch ival3 if  count > 1\n"
 829     gdb_expect {
 830       -re "Watchpoint \[0-9\]*: ival3.*$gdb_prompt $"\
 831               {pass "set slow conditional watch"}
 832       -re "$gdb_prompt $"\
 833               {fail "set slow conditional watch"}
 834       timeout {fail "(timeout) set slow conditional watch"}
 835     }
 836     send_gdb "continue\n"
 837     gdb_expect {
 838       -re "Watchpoint \[0-9\]*: ival3.*Old value = 1.*New value = 2.*$gdb_prompt $"\
 839               {pass "trigger slow conditional watch"}
 840       -re "$gdb_prompt $"\
 841               {fail "trigger slow conditional watch"}
 842       timeout {fail "(timeout) trigger slow conditional watch"}
 843     }
 844
 845     # We've explicitly disabled hardware watches.  Verify that GDB
 846     # refrains from using them.
 847     #
 848     send_gdb "rwatch ival3\n"
 849     gdb_expect {
 850       -re "Expression cannot be implemented with read/access watchpoint..*$gdb_prompt $"\
 851               {pass "rwatch disallowed when can-set-hw-watchpoints cleared"}
 852       -re "$gdb_prompt $"\
 853               {fail "rwatch disallowed when can-set-hw-watchpoints cleared"}
 854       timeout {fail "(timeout) rwatch disallowed when can-use-hw-watchpoints cleared"}
 855     }
 856
 857     # Read- and access watchpoints are unsupported on HP-UX.  Verify
 858     # that GDB gracefully responds to requests to create them.
 859     #
 860     if [istarget "hppa*-*-hpux*"] then {
 861       send_gdb "set can-use-hw-watchpoints 1\n"
 862       gdb_expect {
 863         -re "$gdb_prompt $"\
 864                 {pass "enable fast watches"}
 865         timeout {fail "(timeout) enable fast watches"}
 866       }
 867       send_gdb "rwatch ival3\n"
 868       gdb_expect {
 869         -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\
 870                 {pass "read watches disallowed"}
 871         -re "$gdb_prompt $"\
 872                 {fail "read watches disallowed"}
 873         timeout {fail "(timeout) read watches disallowed"}
 874       }
 875
 876       send_gdb "awatch ival3\n"
 877       gdb_expect {
 878         -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\
 879                 {pass "access watches disallowed"}
 880         -re "$gdb_prompt $"\
 881                 {fail "access watches disallowed"}
 882         timeout {fail "(timeout) access watches disallowed"}
 883       }
 884     }
 885
 886     # See above.
 887     if [istarget "mips-idt-*"] then {
 888         gdb_exit
 889         gdb_start
 890         gdb_reinitialize_dir $srcdir/$subdir
 891         gdb_load $binfile
 892         initialize
 893     }
 894
 895     test_watchpoint_and_breakpoint
 896
 897     test_watchpoint_in_big_blob
 898
 899     # See above.
 900     if [istarget "mips-idt-*"] then {
 901         clean_restart
 902     }
 903
 904     test_constant_watchpoint
 905
 906     test_watch_location
 907 }
 908
 909 # Restore old timeout
 910 set timeout $prev_timeout
 911 verbose "Timeout now $timeout sec.\n"