1 # Copyright 1992-2013 Free Software Foundation, Inc.
3 # This program is free software; you can redistribute it and/or modify
4 # it under the terms of the GNU General Public License as published by
5 # the Free Software Foundation; either version 3 of the License, or
6 # (at your option) any later version.
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.
13 # You should have received a copy of the GNU General Public License
14 # along with this program. If not, see <http://www.gnu.org/licenses/>.
16 # This file was written by Fred Fish. (fnf@cygnus.com)
21 if [get_compiler_info] {
25 if { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
26 untested watchpoint.exp
30 # True if we're forcing no hardware watchpoints.
33 # Prepare for watchpoint tests by setting up two breakpoints and one
36 # We use breakpoints at marker functions to get past all the startup code,
37 # so we can get to the watchpoints in a reasonable amount of time from a
38 # known starting point.
40 # For simplicity, so we always know how to reference specific breakpoints or
41 # watchpoints by number, we expect a particular ordering and numbering of
42 # each in the combined breakpoint/watchpoint table, as follows:
45 # 1 Breakpoint marker1()
46 # 2 Breakpoint marker2()
55 if [gdb_test "break marker1" "Breakpoint 1 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker1" ] {
60 if [gdb_test "break marker2" "Breakpoint 2 at $hex: file .*$srcfile, line $decimal.*" "set breakpoint at marker2" ] {
65 if [gdb_test "info break" "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*" "info break in watchpoint.exp" ] {
69 gdb_test "watch ival3" ".*\[Ww\]atchpoint 3: ival3.*" "set watchpoint on ival3"
71 if [gdb_test "info watch" "3\[ \]*.*watchpoint.*ival3" "watchpoint found in watchpoint/breakpoint table" ] {
76 # After installing the watchpoint, we disable it until we are ready
77 # to use it. This allows the test program to run at full speed until
78 # we get to the first marker function.
80 if [gdb_test "disable 3" "disable 3\[\r\n\]+" "disable watchpoint" ] {
89 # Test simple watchpoint.
92 proc test_simple_watchpoint {} {
97 # Ensure that the watchpoint is disabled when we startup.
99 if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_simple_watchpoint" ] {
103 # Run until we get to the first marker function.
107 set test "run to marker1 in test_simple_watchpoint"
108 set retcode [gdb_test_multiple "" $test {
109 -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
114 if { $retcode != 0 } {
118 # After reaching the marker function, enable the watchpoint.
120 if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "enable watchpoint" ] {
125 gdb_test "break func1" "Breakpoint.*at.*"
126 gdb_test_no_output "set \$func1_breakpoint_number = \$bpnum"
128 gdb_test "continue" "Continuing.*Breakpoint \[0-9\]*, func1.*" \
129 "continue to breakpoint at func1"
131 # Continue until the first change, from -1 to 0
133 set test "watchpoint hit, first time"
134 gdb_test_multiple "cont" $test {
135 -re "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*$gdb_prompt $" {
138 -re "Continuing.*Breakpoint.*func1.*$gdb_prompt $" {
139 setup_xfail "m68*-*-*" 2597
140 fail "thought it hit breakpoint at func1 twice"
141 gdb_test_no_output "delete \$func1_breakpoint_number"
142 gdb_test "continue" "\
143 Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count;" \
148 # Check that the hit count is reported correctly
149 gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 1 time.*" "Watchpoint hit count is 1"
151 gdb_test_no_output "delete \$func1_breakpoint_number"
153 # Continue until the next change, from 0 to 1.
154 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit, second time"
156 # Check that the hit count is reported correctly
157 gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 2 times.*" "Watchpoint hit count is 2"
159 # Continue until the next change, from 1 to 2.
160 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 1.*New value = 2.*ival3 = count; ival4 = count;.*" "watchpoint hit, third time"
162 # Check that the hit count is reported correctly
163 gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 3 times.*" "Watchpoint hit count is 3"
165 # Continue until the next change, from 2 to 3.
166 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 2.*New value = 3.*ival3 = count; ival4 = count;.*" "watchpoint hit, fourth time"
168 # Check that the hit count is reported correctly
169 gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 4 times.*" "Watchpoint hit count is 4"
171 # Continue until the next change, from 3 to 4.
172 # Note that this one is outside the loop.
174 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 3.*New value = 4.*ival3 = count; ival4 = count;.*" "watchpoint hit, fifth time"
176 # Check that the hit count is reported correctly
177 gdb_test "info break" ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+ival3\r\n\[ \t]+breakpoint already hit 5 times.*" "Watchpoint hit count is 5"
179 # Continue until we hit the finishing marker function.
180 # Make sure we hit no more watchpoints.
182 gdb_test "cont" "Continuing.*Breakpoint.*marker2 \(\).*" \
183 "continue to marker2"
185 # Disable the watchpoint so we run at full speed until we exit.
187 if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "watchpoint disabled" ] {
192 # Run until process exits.
194 if [target_info exists gdb,noresults] { return }
196 gdb_continue_to_end "continue to exit in test_simple_watchpoint"
199 # Test disabling watchpoints.
201 proc test_disabling_watchpoints {} {
208 gdb_test "info watch" "\[0-9]+\[ \]*.*watchpoint.*ival3.*" "watchpoints found in watchpoint/breakpoint table"
210 # Ensure that the watchpoint is disabled when we startup.
212 if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint in test_disabling_watchpoints" ] {
217 # Run until we get to the first marker function.
221 set test "run to marker1 in test_disabling_watchpoints"
222 set retcode [gdb_test_multiple "" $test {
223 -re "Breakpoint 1, marker1 .*$gdb_prompt $" {
228 if { $retcode != 0 } {
232 # After reaching the marker function, enable the watchpoint.
234 if [gdb_test "enable 3" "^enable 3\[\r\n\]+" "watchpoint enabled" ] {
239 # Continue until the first change, from -1 to 0
240 # Don't check the old value, because on VxWorks the variable value
241 # will not have been reinitialized.
242 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = .*New value = 0.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, first time"
244 # Continue until the next change, from 0 to 1.
245 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"
247 # Disable the watchpoint but leave breakpoints
249 if [gdb_test "disable 3" "^disable 3\[\r\n\]+" "disable watchpoint #2 in test_disabling_watchpoints" ] {
254 # Check watchpoint list, looking for the entry that confirms the
255 # watchpoint is disabled.
256 gdb_test "info watchpoints" "\[0-9]+\[ \]*.*watchpoint\[ \]*keep\[ \]*n\[ \]*ival3\r\n.*" "watchpoint disabled in table"
258 # Continue until we hit the finishing marker function.
259 # Make sure we hit no more watchpoints.
260 gdb_test "cont" "Continuing.*Breakpoint.*marker2 \\(\\).*" \
261 "disabled watchpoint skipped"
263 if [target_info exists gdb,noresults] { return }
265 gdb_continue_to_end "continue to exit in test_disabling_watchpoints"
268 # Test stepping and other mundane operations with watchpoints enabled
269 proc test_stepping {} {
272 if [runto marker1] then {
273 gdb_test "watch ival2" ".*\[Ww\]atchpoint \[0-9\]*: ival2"
275 # Well, let's not be too mundane. It should be a *bit* of a challenge
276 gdb_test "break func2 if 0" "Breakpoint.*at.*"
277 gdb_test "p \$func2_breakpoint_number = \$bpnum" " = .*"
279 gdb_test "p func1 ()" "= 73" \
280 "calling function with watchpoint enabled"
283 # "finish" brings us back to main.
284 # On some targets (e.g. alpha) gdb will stop from the finish in midline
285 # of the marker1 call. This is due to register restoring code on
286 # the alpha and might be caused by stack adjustment instructions
287 # on other targets. In this case we will step once more.
292 -re "Run.*exit from.*marker1.* at" {
293 pass "finish from marker1"
295 default { fail "finish from marker1 (timeout)" ; return }
299 -re "marker1 \\(\\);.*$gdb_prompt $" {
303 -re "func1 \\(\\);.*$gdb_prompt $" {
304 pass "back at main from marker1"
306 -re ".*$gdb_prompt $" {
307 fail "back at main from marker1"
309 default { fail "back at main from marker1 (timeout)" ; return }
312 gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp"
314 # Now test that "until" works. It's a bit tricky to test
315 # "until", because compilers don't always arrange the code
316 # exactly the same way, and we might get slightly different
317 # sequences of statements. But the following should be true
318 # (if not it is a compiler or a debugger bug): The user who
319 # does "until" at every statement of a loop should end up
320 # stepping through the loop once, and the debugger should not
321 # stop for any of the remaining iterations.
323 gdb_test "until" "ival1 = count.*" "until to ival1 assignment"
324 gdb_test "until" "ival3 = count.*" "until to ival3 assignment"
325 set test "until out of loop"
326 gdb_test_multiple "until" $test {
327 -re "(for \\(count = 0|\}).*$gdb_prompt $" {
328 gdb_test "until" "ival1 = count; /. Outside loop ./" $test
330 -re "ival1 = count; /. Outside loop ./.*$gdb_prompt $" {
335 gdb_test "step" "ival2 = count.*" "step to ival2 assignment"
339 # Test stepping and other mundane operations with watchpoints enabled
340 proc test_watchpoint_triggered_in_syscall {} {
343 # These tests won't work without printf support.
344 if [gdb_skip_stdio_test "watchpoints triggered in syscall"] {
347 # Run until we get to the first marker function.
350 set testname "Watch buffer passed to read syscall"
351 if [runto marker2] then {
352 gdb_test "watch buf\[0\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[0\\\]"
353 gdb_test "watch buf\[1\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[1\\\]"
354 gdb_test "watch buf\[2\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[2\\\]"
355 gdb_test "watch buf\[3\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[3\\\]"
356 gdb_test "watch buf\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]"
357 gdb_test "break marker4" ".*Breakpoint.*"
359 gdb_test_no_output "set doread = 1"
361 # If we send gdb "123\n" before gdb has switched the tty, then it goes
362 # to gdb, not the inferior, and we lose. So that is why we have
363 # watchpoint.c prompt us, so we can wait for that prompt.
365 send_gdb "continue\n"
367 -re "Continuing\\.\r\ntype stuff for buf now:" {
368 pass "continue to read"
371 fail "continue to read"
377 gdb_test_multiple "123" $test {
378 -re ".*\[Ww\]atchpoint.*buf\\\[0\\\].*Old value = 0.*New value = 49\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
379 -re ".*\[Ww\]atchpoint.*buf\\\[1\\\].*Old value = 0.*New value = 50\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
380 -re ".*\[Ww\]atchpoint.*buf\\\[2\\\].*Old value = 0.*New value = 51\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
381 -re ".*\[Ww\]atchpoint.*buf\\\[3\\\].*Old value = 0.*New value = 10\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
382 -re ".*$gdb_prompt $" { pass $test }
385 # Examine the values in buf to see how many watchpoints we
386 # should have printed.
387 set test "print buf\[0\]"
388 gdb_test_multiple $test $test {
389 -re ".*= 49.*$gdb_prompt $" { set y [expr $y+1]; pass $test }
390 -re ".*= 0.*$gdb_prompt $" { $test }
392 set test "print buf\[1\]"
393 gdb_test_multiple $test $test {
394 -re ".*= 50.*$gdb_prompt $" { set y [expr $y+1]; pass $test }
395 -re ".*= 0.*$gdb_prompt $" { pass $test }
397 set test "print buf\[2\]"
398 gdb_test_multiple $test $test {
399 -re ".*= 51.*$gdb_prompt $" { set y [expr $y+1]; pass $test }
400 -re ".*= 0.*$gdb_prompt $" { pass $test }
402 set test "print buf\[3\]"
403 gdb_test_multiple $test $test {
404 -re ".*= 10.*$gdb_prompt $" { set y [expr $y+1]; pass $test }
405 -re ".*= 0.*$gdb_prompt $" { pass $test }
408 # Did we find what we were looking for? If not, flunk it.
409 if [expr $x==$y] then { pass $testname } else { fail "$testname (only triggered $x watchpoints, expected $y)"}
411 # Continue until we hit the finishing marker function.
412 # Make sure we hit no more watchpoints.
413 gdb_test "cont" "Continuing.*Breakpoint.*marker4 \\(\\).*" \
414 "continue to marker4"
416 # Disable everything so we can finish the program at full speed
417 gdb_test_no_output "disable" "disable in test_watchpoint_triggered_in_syscall"
419 if [target_info exists gdb,noresults] { return }
421 gdb_continue_to_end "continue to exit in test_watchpoint_triggered_in_syscall"
425 # Do a simple test of of watching through a pointer when the pointer
426 # itself changes. Should add some more complicated stuff here.
428 proc test_complex_watchpoint {} {
431 if [runto marker4] then {
432 gdb_test "watch ptr1->val" ".*\[Ww\]atchpoint \[0-9\]*: ptr1->val"
433 gdb_test "break marker5" ".*Breakpoint.*"
435 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ptr1->val.*Old value = 1.*New value = 2.*" "Test complex watchpoint"
437 # Continue until we hit the marker5 function.
438 # Make sure we hit no more watchpoints.
440 gdb_test "cont" "Continuing.*Breakpoint.*marker5 \\(\\).*" \
441 "did not trigger wrong watchpoint"
443 # Test watches of things declared locally in a function.
444 # In particular, test that a watch of stack-based things
445 # is deleted when the stack-based things go out of scope.
447 gdb_test_no_output "disable" "disable in test_complex_watchpoint"
448 gdb_test "break marker6" ".*Breakpoint.*"
449 gdb_test "cont" "Continuing.*Breakpoint.*marker6 \\(\\).*" \
450 "continue to marker6"
451 gdb_breakpoint [gdb_get_line_number "func2 breakpoint here"]
452 gdb_continue_to_breakpoint "func2 breakpoint here"
454 # Test a watch of a single stack-based variable, whose scope
455 # is the function we're now in. This should auto-delete when
456 # execution exits the scope of the watchpoint.
458 gdb_test "watch local_a" ".*\[Ww\]atchpoint \[0-9\]*: local_a" "set local watch"
459 gdb_test "cont" "\[Ww\]atchpoint.*local_a.*" "trigger local watch"
461 set test "self-delete local watch"
462 gdb_test_multiple "cont" $test {
463 -re "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*\r\n$gdb_prompt $" {
466 -re "can't compute CFA for this frame.*\r\n$gdb_prompt $" {
467 global compiler_info no_hw
469 # GCC < 4.5.0 does not get LOCATIONS_VALID set by dwarf2read.c.
470 # Therefore epilogue unwinder gets applied which is
471 # incompatible with dwarf2_frame_cfa.
472 verbose -log "compiler_info: $compiler_info"
473 if {$no_hw && ([test_compiler_info {gcc-[0-3]-*}]
474 || [test_compiler_info {gcc-4-[0-4]-*}])} {
475 xfail "$test (old GCC has broken watchpoints in epilogues)"
482 gdb_continue_to_breakpoint "func2 breakpoint here"
483 # We should be in "func2" again now. Test a watch of an
484 # expression which includes both a stack-based local and
485 # something whose scope is larger than this invocation
486 # of "func2". This should also auto-delete.
488 gdb_test "watch local_a + ival5" ".*\[Ww\]atchpoint \[0-9\]*: local_a . ival5" \
489 "set partially local watch"
490 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
491 "trigger1 partially local watch"
492 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
493 "trigger2 partially local watch"
494 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
495 "self-delete partially local watch"
497 # We should be in "func2" again now. Test a watch of a
498 # static (non-stack-based) local. Since this has scope
499 # across any invocations of "func2", it should not auto-
502 gdb_continue_to_breakpoint "func2 breakpoint here"
503 gdb_test "watch static_b" ".*\[Ww\]atchpoint \[0-9\]*: static_b" \
504 "set static local watch"
505 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: static_b.*" \
506 "trigger static local watch"
507 gdb_test "cont" "Continuing.*marker6 \\(\\).*" \
508 "continue after trigger static local watch"
509 gdb_test "info break" ".*watchpoint.*static_b.*" \
510 "static local watch did not self-delete"
512 # We should be in "recurser" now. Test a watch of a stack-
513 # based local. Symbols mentioned in a watchpoint are bound
514 # at watchpoint-creation. Thus, a watch of a stack-based
515 # local to a recursing function should be bound only to that
516 # one invocation, and should not trigger for other invocations.
518 gdb_test "tbreak recurser" ".*breakpoint.*"
519 gdb_test "cont" "Continuing.*recurser.*"
520 gdb_test "next" "if \\(x > 0.*" "next past local_x initialization"
521 gdb_test "watch local_x" ".*\[Ww\]atchpoint \[0-9\]*: local_x" \
522 "set local watch in recursive call"
523 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_x.*New value = 2.*" \
524 "trigger local watch in recursive call"
525 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
526 "self-delete local watch in recursive call"
528 # Repeat the preceding test, but this time use "recurser::local_x" as
529 # the variable to track.
530 gdb_test "cont" "Continuing.*marker6.*"
531 gdb_test "tbreak recurser" ".*breakpoint.*"
532 gdb_test "cont" "Continuing.*recurser.*"
533 gdb_test "next" "if \\(x > 0.*" "next past local_x initialization"
534 gdb_test "watch recurser::local_x" ".*\[Ww\]atchpoint \[0-9\]*: recurser::local_x" \
535 "set local watch in recursive call with explicit scope"
536 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: recurser::local_x.*New value = 2.*" \
537 "trigger local watch with explicit scope in recursive call"
538 gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
539 "self-delete local watch with explicit scope in recursive call (2)"
541 # Disable everything so we can finish the program at full speed
542 gdb_test_no_output "disable" "disable in test_complex_watchpoint"
544 if [target_info exists gdb,noresults] { return }
546 gdb_continue_to_end "continue to exit in test_complex_watchpoint"
550 proc test_watchpoint_and_breakpoint {} {
553 # This is a test for PR gdb/38, which involves setting a
554 # watchpoint right after you've reached a breakpoint.
556 if [runto func3] then {
557 gdb_breakpoint [gdb_get_line_number "second x assignment"]
558 gdb_continue_to_breakpoint "second x assignment"
559 gdb_test "watch x" ".*atchpoint \[0-9\]+: x"
560 gdb_test_multiple "next" "next after watch x" {
561 -re ".*atchpoint \[0-9\]+: x\r\n\r\nOld value = 0\r\nNew value = 1\r\n.*$gdb_prompt $" {
562 pass "next after watch x"
564 -re "\[0-9\]+\[\t \]+y = 1;\r\n$gdb_prompt $" {
565 kfail "gdb/38" "next after watch x"
569 gdb_test_no_output "delete \$bpnum" "delete watch x"
573 proc test_constant_watchpoint {} {
574 gdb_test "watch 5" "Cannot watch constant value `5'." "number is constant"
575 gdb_test "watch (int *)5" "Cannot watch constant value `\\(int \\*\\)5'." \
576 "number with cast is constant"
577 gdb_test "watch marker1" "Cannot watch constant value `marker1'." \
578 "marker1 is constant"
579 gdb_test "watch count + 6" ".*atchpoint \[0-9\]+: count \\+ 6"
580 gdb_test_no_output "delete \$bpnum" "delete watchpoint `count + 6'"
581 gdb_test "watch 7 + count" ".*atchpoint \[0-9\]+: 7 \\+ count"
582 gdb_test_no_output "delete \$bpnum" "delete watchpoint `7 + count'"
585 proc test_disable_enable_software_watchpoint {} {
586 # This is regression test for a bug that caused `enable' to fail
587 # for software watchpoints.
589 # Watch something not memory to force a software watchpoint.
590 gdb_test {watch $pc} ".*atchpoint \[0-9\]+: .pc"
592 gdb_test_no_output "disable \$bpnum" "disable watchpoint `\$pc'"
593 gdb_test_no_output "enable \$bpnum" "reenable watchpoint `\$pc'"
595 gdb_test "info watchpoint \$bpnum" \
596 ".*watchpoint\[ \t\]+keep\[ \t\]+y\[ \t\]+.pc.*" \
597 "watchpoint `\$pc' is enabled"
599 gdb_test_no_output "delete \$bpnum" "delete watchpoint `\$pc'"
602 proc test_watch_location {} {
603 gdb_breakpoint [gdb_get_line_number "func5 breakpoint here"]
604 gdb_continue_to_breakpoint "func5 breakpoint here"
606 gdb_test "watch -location *x" "atchpoint .*: .*" "watch -location .x"
608 gdb_test "continue" \
609 "Continuing.*\[Ww\]atchpoint .*: .*New value = 27.*" \
610 "continue with watch -location"
612 gdb_test_no_output "delete \$bpnum" "delete watch -location"
615 # Tests watching areas larger than a word.
617 proc test_wide_location_1 {} {
621 # This test watches two words on most 32-bit ABIs, and one word on
624 # Platforms where the target can't watch such a large region
625 # should clear hw_expected below.
626 if { $no_hw || [target_info exists gdb,no_hardware_watchpoints]
627 || [istarget arm*-*-*]
628 || ([istarget powerpc*-*-*] && ![is_lp64_target])} {
634 gdb_breakpoint [gdb_get_line_number "func6 breakpoint here"]
635 gdb_continue_to_breakpoint "func6 breakpoint here"
637 if { $hw_expected } {
638 gdb_test "watch foo2" "Hardware watchpoint .*: .*" "watch foo2"
639 gdb_test "continue" \
640 "Continuing.*Hardware watchpoint .*: .*New value = \\\{val = \\\{0, 11\\\}\\\}.*" \
641 "continue with watch foo2"
643 gdb_test "watch foo2" "atchpoint .*: .*" "watch foo2"
644 set test "continue with watch foo2"
645 gdb_test_multiple "cont" $test {
646 -re "Continuing.*\[Ww\]atchpoint .*: .*New value = \\\{val = \\\{0, 11\\\}\\\}.*$gdb_prompt $" {
649 -re "Could not insert hardware breakpoints:.*You may have requested too many hardware breakpoints/watchpoints.*$gdb_prompt $" {
650 # This may happen with remote targets that support
651 # hardware watchpoints. We only find out the
652 # watchpoint was too large, for example, at insert
653 # time. If GDB is ever adjusted to downgrade the
654 # watchpoint automatically in this case, this match
661 gdb_test_no_output "delete \$bpnum" "delete watch foo2"
664 proc test_wide_location_2 {} {
668 # This test watches four words on most 32-bit ABIs, and two words
671 # Platforms where the target can't watch such a large region
672 # should clear hw_expected below.
673 if { $no_hw || [target_info exists gdb,no_hardware_watchpoints]
674 || [istarget arm*-*-*]
675 || [istarget powerpc*-*-*]} {
681 gdb_breakpoint [gdb_get_line_number "func7 breakpoint here"]
682 gdb_continue_to_breakpoint "func7 breakpoint here"
684 if { $hw_expected } {
685 gdb_test "watch foo4" "Hardware watchpoint .*: .*" "watch foo4"
686 gdb_test "continue" \
687 "Continuing.*Hardware watchpoint .*: .*New value = \\\{val = \\\{0, 0, 0, 33\\\}\\\}.*" \
688 "continue with watch foo4"
690 gdb_test "watch foo4" "atchpoint .*: .*" "watch foo4"
691 set test "continue with watch foo4"
692 gdb_test_multiple "cont" $test {
693 -re "Continuing.*\[Ww\]atchpoint .*: .*New value = \\\{val = \\\{0, 0, 0, 33\\\}\\\}.*$gdb_prompt $" {
696 -re "Could not insert hardware breakpoints:.*You may have requested too many hardware breakpoints/watchpoints.*$gdb_prompt $" {
697 # This may happen with remote targets that support
698 # hardware watchpoints. We only find out the
699 # watchpoint was too large, for example, at insert
700 # time. If GDB is ever adjusted to downgrade the
701 # watchpoint automatically in this case, this match
708 gdb_test_no_output "delete \$bpnum" "delete watch foo4"
711 proc test_inaccessible_watchpoint {} {
714 # This is a test for watchpoints on currently inaccessible (but later
717 if [runto func4] then {
718 # Make sure we only allow memory access errors.
719 set msg "watchpoint refused to insert on nonexistent struct member"
720 gdb_test_multiple "watch struct1.nosuchmember" $msg {
721 -re ".*atchpoint \[0-9\]+: struct1.nosuchmember.*$gdb_prompt $" {
722 # PR breakpoints/9681
725 -re "There is no member named nosuchmember\\..*$gdb_prompt $" {
730 # See whether a watchpoint on a normal variable is a hardware
731 # watchpoint or not. The watchpoints on NULL should be hardware
733 set watchpoint_msg "Watchpoint"
734 gdb_test_multiple "watch global_ptr" "watch global_ptr" {
735 -re "Watchpoint \[0-9\]+: global_ptr\r\n.*$gdb_prompt $" {
736 pass "watch global_ptr"
738 -re "Hardware watchpoint \[0-9\]+: global_ptr\r\n.*$gdb_prompt $" {
739 set watchpoint_msg "Hardware watchpoint"
740 pass "watch global_ptr"
745 # Make sure that we can watch a constant address, and correctly
746 # use a HW watchpoint if supported.
747 gdb_test "watch *(int *) 0" \
748 "$watchpoint_msg \[0-9\]+: \\*\\(int \\*\\) 0"
751 # The same, but using -location through an indirection.
752 gdb_test "watch -location *global_ptr" \
753 "$watchpoint_msg \[0-9\]+: \-location \\*global_ptr"
756 # This step requires two HW watchpoints. Since some platforms only
757 # have a single one, accept either SW or HW watchpoint in this case.
758 if {[skip_hw_watchpoint_multi_tests]} {
759 set watchpoint_msg "(Watchpoint|Hardware watchpoint)"
762 gdb_test "watch *global_ptr" "$watchpoint_msg \[0-9\]+: \\\*global_ptr"
763 gdb_test "set \$global_ptr_breakpoint_number = \$bpnum" ""
764 gdb_test "next" ".*global_ptr = buf.*" "global_ptr next"
765 gdb_test_multiple "next" "next over ptr init" {
766 -re ".*atchpoint \[0-9\]+: \\*global_ptr\r\n\r\nOld value = .*\r\nNew value = 3 .*\r\n.*$gdb_prompt $" {
767 # We can not test for <unknown> here because NULL may be readable.
768 # This test does rely on *NULL != 3.
769 pass "next over ptr init"
772 gdb_test_multiple "next" "next over buffer set" {
773 -re ".*atchpoint \[0-9\]+: \\*global_ptr\r\n\r\nOld value = 3 .*\r\nNew value = 7 .*\r\n.*$gdb_prompt $" {
774 pass "next over buffer set"
777 gdb_test "delete \$global_ptr_breakpoint_number" ""
778 gdb_test "watch **global_ptr_ptr" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr"
779 gdb_test "set \$global_ptr_ptr_breakpoint_number = \$bpnum" ""
780 gdb_test "next" ".*global_ptr_ptr = &global_ptr.*" "global_ptr_ptr next"
781 gdb_test "next" ".*atchpoint \[0-9\]+: \\*\\*global_ptr_ptr\[\r\n\]+Old value = .*\r\nNew value = 7 .*" "next over global_ptr_ptr init"
782 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"
783 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"
784 gdb_test_no_output "delete \$global_ptr_ptr_breakpoint_number"
788 proc test_no_hw_watchpoints {} {
791 clean_restart $testfile
793 # Verify that a user can force GDB to use "slow" watchpoints.
794 # (This proves rather little on kernels that don't support
795 # fast watchpoints, but still...)
797 if ![runto_main] then { fail "watch tests suppressed" }
799 gdb_test_no_output "set can-use-hw-watchpoints 0" "disable fast watches"
801 gdb_test "show can-use-hw-watchpoints" \
802 "Debugger's willingness to use watchpoint hardware is 0." \
803 "show disable fast watches"
805 gdb_test "watch ival3 if count > 1" \
806 "Watchpoint \[0-9\]*: ival3.*" \
807 "set slow conditional watch"
809 gdb_test "continue" \
810 "Watchpoint \[0-9\]*: ival3.*Old value = 1.*New value = 2.*" \
811 "trigger slow conditional watch"
813 gdb_test_no_output "delete \$bpnum" "delete watch ival3"
815 gdb_test "watch ival3 if count > 1 thread 1 " \
816 "Watchpoint \[0-9\]*: ival3.*" \
817 "set slow condition watch w/thread"
819 gdb_test_no_output "delete \$bpnum" "delete watch w/condition and thread"
821 # We've explicitly disabled hardware watches. Verify that GDB
822 # refrains from using them.
824 gdb_test "rwatch ival3" \
825 "Expression cannot be implemented with read/access watchpoint..*" \
826 "rwatch disallowed when can-set-hw-watchpoints cleared"
828 # Re-enable hardware watchpoints if necessary.
829 if ![target_info exists gdb,no_hardware_watchpoints] {
830 gdb_test_no_output "set can-use-hw-watchpoints 1" ""
834 proc test_watchpoint_in_big_blob {} {
837 # On native targets where we do hardware resource accounting, this
838 # may end up as a software watchpoint.
841 gdb_test_multiple "watch buf" $test {
842 -re "Hardware watchpoint \[0-9\]+: buf.*You may have requested too many hardware breakpoints/watchpoints.*$gdb_prompt $" {
843 # This may happen with remote targets (where we don't do
844 # resource accounting) that support hardware watchpoints,
845 # when breakpoint always-inserted is on. The watchpoint
846 # was too large, for example. If GDB is ever adjusted to
847 # downgrade the watchpoint automatically in this case,
848 # this match should be removed. Note the breakpoint has
849 # been created, and is in the list, so it needs deleting.
852 -re ".*atchpoint \[0-9\]+: buf.*$gdb_prompt $" {
859 set test "watchpoint on buf hit"
860 gdb_test_multiple "cont" $test {
861 -re "Continuing.*atchpoint \[0-9\]+: buf\r\n\r\nOld value = .*testte\".*$gdb_prompt $" {
864 -re "Could not insert hardware breakpoints:.*You may have requested too many hardware breakpoints/watchpoints.*$gdb_prompt $" {
865 # This may happen with remote targets that support
866 # hardware watchpoints. We only find out the
867 # watchpoint was too large, for example, at insert
868 # time. If GDB is ever adjusted to downgrade the
869 # watchpoint automatically in this case, this match
876 gdb_test_no_output "delete \$bpnum" "delete watch buf"
879 # Start with a fresh gdb.
881 set prev_timeout $timeout
883 verbose "Timeout now 600 sec.\n"
885 test_no_hw_watchpoints
891 clean_restart $testfile
893 if {$no_hw || [target_info exists gdb,no_hardware_watchpoints]} {
894 gdb_test_no_output "set can-use-hw-watchpoints 0" ""
897 if [initialize] then {
899 test_simple_watchpoint
901 test_disabling_watchpoints
903 if ![target_info exists gdb,cannot_call_functions] {
908 # Tests below don't rely on the markers and watchpoint set by
909 # `initialize' anymore.
910 clean_restart $testfile
912 if {$no_hw || [target_info exists gdb,no_hardware_watchpoints]} {
913 gdb_test_no_output "set can-use-hw-watchpoints 0" ""
916 # Only enabled for some targets merely because it has not been tested
918 # On sparc-sun-sunos4.1.3, GDB was running all the way to the marker4
919 # breakpoint before stopping for the watchpoint. I don't know why.
920 if {[istarget "hppa*-*-*"]} then {
921 test_watchpoint_triggered_in_syscall
924 test_complex_watchpoint
926 test_inaccessible_watchpoint
928 test_watchpoint_and_breakpoint
930 test_watchpoint_in_big_blob
932 test_constant_watchpoint
934 test_disable_enable_software_watchpoint
942 # On targets that can do hardware watchpoints, run the tests twice:
943 # once with hardware watchpoints enabled; another with hardware
944 # watchpoints force-disabled.
947 if ![target_info exists gdb,no_hardware_watchpoints] {
948 with_test_prefix "no-hw" {
954 # Restore old timeout
955 set timeout $prev_timeout
956 verbose "Timeout now $timeout sec.\n"