* gdb.base/break.exp: Don't test for program exit or exit status
[binutils-gdb.git] / gdb / testsuite / gdb.base / watchpoint.exp
1 # Copyright (C) 1992, 1994 Free Software Foundation, Inc.
2
3 # This program is free software; you can redistribute it and/or modify
4 # it under the terms of the GNU General Public License as published by
5 # the Free Software Foundation; either version 2 of the License, or
6 # (at your option) any later version.
7 #
8 # This program is distributed in the hope that it will be useful,
9 # but WITHOUT ANY WARRANTY; without even the implied warranty of
10 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 # GNU General Public License for more details.
12 #
13 # You should have received a copy of the GNU General Public License
14 # along with this program; if not, write to the Free Software
15 # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
16
17 # Please email any bugs, comments, and/or additions to this file to:
18 # bug-gdb@prep.ai.mit.edu
19
20 # This file was written by Fred Fish. (fnf@cygnus.com)
21
22 if $tracelevel then {
23 strace $tracelevel
24 }
25
26 set prms_id 0
27 set bug_id 0
28
29 set testfile "watchpoint"
30 set srcfile ${testfile}.c
31 set binfile ${objdir}/${subdir}/${testfile}
32 if { [compile "${srcdir}/${subdir}/${srcfile} -g -o ${binfile}"] != "" } {
33 perror "Couldn't compile ${srcfile}"
34 return -1
35 }
36
37 # Prepare for watchpoint tests by setting up two breakpoints and one
38 # watchpoint.
39 #
40 # We use breakpoints at marker functions to get past all the startup code,
41 # so we can get to the watchpoints in a reasonable amount of time from a
42 # known starting point.
43 #
44 # For simplicity, so we always know how to reference specific breakpoints or
45 # watchpoints by number, we expect a particular ordering and numbering of
46 # each in the combined breakpoint/watchpoint table, as follows:
47 #
48 # Number What Where
49 # 1 Breakpoint marker1()
50 # 2 Breakpoint marker2()
51 # 3 Watchpoint ival3
52
53 proc initialize {} {
54 global prompt
55 global hex
56 global decimal
57 global srcfile
58
59 send "break marker1\n"
60 expect {
61 -re "Breakpoint 1 at $hex: file .*$srcfile, line $decimal.*$prompt $" {
62 pass "set breakpoint at marker1"
63 }
64 -re ".*$prompt $" { fail "set breakpoint at marker1" ; return 0 }
65 timeout { fail "set breakpoint at marker1 (timeout)" ; return 0 }
66 }
67
68 send "break marker2\n"
69 expect {
70 -re "Breakpoint 2 at $hex: file .*$srcfile, line $decimal.*$prompt $" {
71 pass "set breakpoint at marker2"
72 }
73 -re ".*$prompt $" { fail "set breakpoint at marker2" ; return 0 }
74 timeout { fail "set breakpoint at marker2 (timeout)" ; return 0 }
75 }
76
77 send "info break\n"
78 expect {
79 -re "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n$prompt $" { pass "info break in watchpoint.exp" }
80 -re ".*$prompt $" { fail "info break in watchpoint.exp" ; return 0 }
81 timeout { fail "info break in watchpoint.exp (timeout)" ; return 0 }
82 }
83
84 send "watch ival3\n"
85 expect {
86 -re ".*\[Ww\]atchpoint 3: ival3\r\n$prompt $" {
87 pass "set watchpoint on ival3"
88 }
89 -re ".*$prompt $" { fail "set watchpoint on ival3" ; return 0 }
90 timeout { fail "set watchpoint on ival3 (timeout)" ; return 0 }
91 }
92
93 # "info watch" is the same as "info break"
94
95 send "info watch\n"
96 expect {
97 -re "1\[ \]*breakpoint.*marker1.*\r\n2\[ \]*breakpoint.*marker2.*\r\n3\[ \]*.*watchpoint.*ival3\r\n$prompt $" {
98 pass "watchpoint found in watchpoint/breakpoint table"
99 }
100 -re ".*$prompt $" {
101 fail "watchpoint found in watchpoint/breakpoint table" ; return 0
102 }
103 timeout {
104 fail "watchpoint found in watchpoint/breakpoint table" ; 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 send "disable 3\n"
113 expect {
114 -re "disable 3\[\r\n\]+$prompt $" { pass "disable watchpoint" }
115 -re ".*$prompt $" { fail "disable watchpoint" ; return 0 }
116 timeout { fail "disable watchpoint (timeout)" ; return 0 }
117 }
118
119 return 1
120 }
121
122 #
123 # Test simple watchpoint.
124 #
125
126 proc test_simple_watchpoint {} {
127 global prompt
128 global hex
129 global decimal
130 global noresults
131
132 # Ensure that the watchpoint is disabled when we startup.
133
134 send "disable 3\n"
135 expect {
136 -re "^disable 3\[\r\n\]+$prompt $" {
137 pass "disable watchpoint in test_simple_watchpoint"
138 }
139 -re ".*$prompt $" {
140 fail "disable watchpoint in test_simple_watchpoint"
141 return 0
142 }
143 timeout {
144 fail "disable watchpoint in test_simple_watchpoint (timeout)"
145 return 0
146 }
147 }
148
149 # Run until we get to the first marker function.
150
151 gdb_run_cmd
152 expect {
153 -re "Breakpoint 1, marker1 .*$prompt $" {
154 pass "run to marker1 in test_simple_watchpoint"
155 }
156 -re ".*$prompt $" {
157 fail "run to marker1 in test_simple_watchpoint"
158 return
159 }
160 timeout {
161 fail "run to marker1 in test_simple_watchpoint (timeout)"
162 return
163 }
164 }
165
166 # After reaching the marker function, enable the watchpoint.
167
168 send "enable 3\n"
169 expect {
170 -re "^enable 3\[\r\n\]+$prompt $" { pass "enable watchpoint" }
171 -re ".*$prompt $" { fail "enable watchpoint" ; return }
172 timeout { fail "enable watchpoint (timeout)" ; return }
173 }
174
175 gdb_test "break func1" "Breakpoint.*at.*"
176 gdb_test "set \$func1_breakpoint_number = \$bpnum" ""
177
178 gdb_test "continue" "Continuing.*Breakpoint \[0-9\]*, func1.*" \
179 "continue to breakpoint at func1"
180
181 # Continue until the first change, from -1 to 0
182
183 send "cont\n"
184 expect {
185 -re "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count; ival4 = count;.*$prompt $" {
186 pass "watchpoint hit, first time"
187 }
188 -re "Continuing.*Breakpoint.*func1.*$prompt $" {
189 setup_xfail "m68*-*-*" 2597
190 fail "thought it hit breakpoint at func1 twice"
191 gdb_test "delete \$func1_breakpoint_number" ""
192 gdb_test "continue" "\
193 Continuing.*\[Ww\]atchpoint.*ival3.*Old value = -1.*New value = 0.*ival3 = count;" \
194 "watchpoint hit, first time"
195 }
196 -re ".*$prompt $" { fail "watchpoint hit, first time" ; return }
197 timeout { fail "watchpoint hit, first time (timeout)" ; return }
198 eof { fail "watchpoint hit, first time (eof)" ; return }
199 }
200
201 gdb_test "delete \$func1_breakpoint_number" ""
202
203 # Continue until the next change, from 0 to 1.
204 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 0.*New value = 1.*ival3 = count; ival4 = count;.*" "watchpoint hit, second time"
205
206 # Continue until the next change, from 1 to 2.
207 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 1.*New value = 2.*ival3 = count; ival4 = count;.*" "watchpoint hit, third time"
208
209 # Continue until the next change, from 2 to 3.
210 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 2.*New value = 3.*ival3 = count; ival4 = count;.*" "watchpoint hit, fourth time"
211
212 # Continue until the next change, from 3 to 4.
213 # Note that this one is outside the loop.
214
215 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = 3.*New value = 4.*ival3 = count; ival4 = count;.*" "watchpoint hit, fifth time"
216
217 # Continue until we hit the finishing marker function.
218 # Make sure we hit no more watchpoints.
219
220 gdb_test "cont" "Continuing.*Breakpoint.*marker2 \(\).*" \
221 "continue to marker2"
222
223 # Disable the watchpoint so we run at full speed until we exit.
224
225 send "disable 3\n"
226 expect {
227 -re "^disable 3\[\r\n\]+$prompt $" { pass "watchpoint disabled" }
228 -re ".*$prompt $" { fail "watchpoint disabled" ; return }
229 timeout { fail "watchpoint disabled (timeout)" ; return }
230 }
231
232 # Run until process exits.
233
234 if $noresults==1 then { return }
235
236 gdb_test "cont" "Continuing.*Program exited normally.*" \
237 "continue to exit in test_simple_watchpoint"
238 }
239
240 # Test disabling watchpoints.
241
242 proc test_disabling_watchpoints {} {
243 global prompt
244 global binfile
245 global srcfile
246 global decimal
247 global hex
248 global noresults
249
250 # Ensure that the watchpoint is disabled when we startup.
251
252 send "disable 3\n"
253 expect {
254 -re "^disable 3\[\r\n\]+$prompt $" {
255 pass "disable watchpoint in test_disabling_watchpoints"
256 }
257 -re ".*$prompt $" {
258 fail "disable watchpoint in test_disabling_watchpoints"
259 return 0
260 }
261 timeout {
262 fail "disable watchpoint in test_disabling_watchpoints (timeout)"
263 return 0
264 }
265 }
266
267 # Run until we get to the first marker function.
268
269 gdb_run_cmd
270 expect {
271 -re "Breakpoint 1, marker1 .*$prompt $" {
272 pass "run to marker1 in test_disabling_watchpoints"
273 }
274 -re ".*$prompt $" {
275 fail "run to marker1 in test_disabling_watchpoints"
276 return
277 }
278 timeout {
279 fail "run to marker1 in test_disabling_watchpoints (timeout)"
280 return
281 }
282 }
283
284 # After reaching the marker function, enable the watchpoint.
285
286 send "enable 3\n"
287 expect {
288 -re "^enable 3\[\r\n\]+$prompt $" { pass "watchpoint enabled" }
289 -re ".*$prompt $" { fail "watchpoint enabled" ; return }
290 timeout { fail "watchpoint enabled (timeout)" ; return }
291 }
292
293 # Continue until the first change, from -1 to 0
294 # Don't check the old value, because on VxWorks the variable value
295 # will not have been reinitialized.
296 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ival3.*Old value = .*New value = 0.*ival3 = count; ival4 = count;.*" "watchpoint hit in test_disabling_watchpoints, first time"
297
298 # Continue until the next change, from 0 to 1.
299 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"
300
301 # Disable the watchpoint but leave breakpoints
302
303 send "disable 3\n"
304 expect {
305 -re "^disable 3\[\r\n\]+$prompt $" {
306 pass "disable watchpoint #2 in test_disabling_watchpoints"
307 }
308 -re ".*$prompt $" {
309 "disable watchpoint #2 in test_disabling_watchpoints"
310 return 0
311 }
312 timeout {
313 "disable watchpoint #2 in test_disabling_watchpoints (timeout)"
314 return 0
315 }
316 }
317
318 # Check watchpoint list, looking for the entry that confirms the
319 # watchpoint is disabled.
320 gdb_test "info watchpoints" "3\[ \]*.*watchpoint\[ \]*keep\[ \]*n\[ \]*ival3\r\n.*" "watchpoint disabled in table"
321
322 # Continue until we hit the finishing marker function.
323 # Make sure we hit no more watchpoints.
324 gdb_test "cont" "Continuing.*Breakpoint.*marker2 \\(\\).*" \
325 "disabled watchpoint skipped"
326
327 if $noresults==1 then { return }
328
329 gdb_test "cont" "Continuing.*Program exited normally.*" \
330 "continue to exit in test_disabling_watchpoints"
331 }
332
333 # Test stepping and other mundane operations with watchpoints enabled
334 proc test_stepping {} {
335 global prompt
336
337 if [runto marker1] then {
338 gdb_test "watch ival2" ".*\[Ww\]atchpoint \[0-9\]*: ival2"
339
340 # Well, let's not be too mundane. It should be a *bit* of a challenge
341 gdb_test "break func2 if 0" "Breakpoint.*at.*"
342 gdb_test "p \$func2_breakpoint_number = \$bpnum" " = .*"
343
344 # The HPPA has a problem here if it's not using hardware watchpoints
345 if {[ istarget "hppa*-*-*" ] && ![ istarget "hppa*-*-*bsd*" ]} then {
346 # Don't actually try doing the call, if we do we can't continue.
347 setup_xfail "*-*-*"
348 fail "calling function with watchpoint enabled"
349 } else {
350 # The problem is that GDB confuses stepping through the call
351 # dummy with hitting the breakpoint at the end of the call dummy.
352 # Will be fixed once all architectures define
353 # CALL_DUMMY_BREAKPOINT_OFFSET.
354 setup_xfail "*-*-*"
355 # This doesn't occur if the call dummy starts with a call,
356 # because we are out of the dummy by the first time the inferior
357 # stops.
358 clear_xfail "m68*-*-*"
359 clear_xfail "i*86*-*-*"
360 clear_xfail "vax-*-*"
361 # The following architectures define CALL_DUMMY_BREAKPOINT_OFFSET.
362 clear_xfail "alpha-*-*"
363 clear_xfail "mips*-*-*"
364 clear_xfail "sparc-*-*"
365 clear_xfail "hppa*-*-*bsd*"
366 gdb_test "p func1 ()" "= 73" \
367 "calling function with watchpoint enabled"
368 }
369
370 #
371 # "finish" brings us back to main.
372 # On some targets (e.g. alpha) gdb will stop from the finish in midline
373 # of the marker1 call. This is due to register restoring code on
374 # the alpha and might be caused by stack adjustment instructions
375 # on other targets. In this case we will step once more.
376 #
377
378 send "finish\n"
379 expect {
380 -re "Run.*exit from.*marker1.*main.* at" { }
381 default { fail "finish from marker1" ; return }
382 }
383 expect {
384 -re "marker1 \\(\\);.*$prompt $" {
385 send "step\n"
386 exp_continue
387 }
388 -re "func1 \\(\\);.*$prompt $" {
389 pass "finish from marker1"
390 }
391 -re ".*$prompt $" {
392 fail "finish from marker1"
393 }
394 default { fail "finish from marker1" ; return }
395 }
396
397 gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp"
398
399 # Now test that "until" works. It's a bit tricky to test
400 # "until", because compilers don't always arrange the code
401 # exactly the same way, and we might get slightly different
402 # sequences of statements. But the following should be true
403 # (if not it is a compiler or a debugger bug): The user who
404 # does "until" at every statement of a loop should end up
405 # stepping through the loop once, and the debugger should not
406 # stop for any of the remaining iterations.
407
408 gdb_test "until" "ival1 = count.*" "until to ival1 assignment"
409 gdb_test "until" "ival3 = count.*" "until to ival3 assignment"
410 send "until\n"
411 expect {
412 -re "(for \\(count = 0|\}).*$prompt $" {
413 gdb_test "until" "ival1 = count; /. Outside loop ./" \
414 "until out of loop"
415 }
416 -re "ival1 = count; /. Outside loop ./.*$prompt $" {
417 pass "until out of loop"
418 }
419 -re ".*$prompt $" {
420 fail "until out of loop"
421 }
422 default { fail "until out of loop" ; return }
423 }
424
425 gdb_test "step" "ival2 = count.*" "step to ival2 assignment"
426 }
427 }
428
429 # Test stepping and other mundane operations with watchpoints enabled
430 proc test_watchpoint_triggered_in_syscall {} {
431 global prompt
432 global noinferiorio
433
434 if $noinferiorio {
435 verbose "Skipping test_watchpoint_triggered_in_syscall due to noinferiorio"
436 return
437 }
438 # Run until we get to the first marker function.
439 set x 0
440 set y 0
441 set testname "Watch buffer passed to read syscall"
442 if [runto marker2] then {
443 gdb_test "watch buf\[0\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[0\\\]"
444 gdb_test "watch buf\[1\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[1\\\]"
445 gdb_test "watch buf\[2\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[2\\\]"
446 gdb_test "watch buf\[3\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[3\\\]"
447 gdb_test "watch buf\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]"
448 gdb_test "break marker4" ".*Breakpoint.*"
449
450 gdb_test "set doread = 1" ""
451
452 # If we send "123\n" before gdb has switched the tty, then it goes
453 # to gdb, not the inferior, and we lose. So that is why we have
454 # watchpoint.c prompt us, so we can wait for that prompt.
455 send "continue\n"
456 expect {
457 -re "Continuing\\.\r\ntype stuff for buf now:" {
458 pass "continue to read"
459 }
460 default { fail "continue to read"; return }
461 }
462 send "123\n"
463 expect {
464 -re ".*\[Ww\]atchpoint.*buf\\\[0\\\].*Old value = 0.*New value = 49\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
465 -re ".*\[Ww\]atchpoint.*buf\\\[1\\\].*Old value = 0.*New value = 50\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
466 -re ".*\[Ww\]atchpoint.*buf\\\[2\\\].*Old value = 0.*New value = 51\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
467 -re ".*\[Ww\]atchpoint.*buf\\\[3\\\].*Old value = 0.*New value = 10\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
468 -re ".*$prompt $" { pass "sent 123" }
469 timeout { fail "sent 123" }
470 }
471
472 # Examine the values in buf to see how many watchpoints we
473 # should have printed.
474 send "print buf\[0\]\n"
475 expect {
476 -re ".*= 49.*$prompt $" { set y [expr $y+1]; pass "print buf\[0\]"}
477 -re ".*= 0.*$prompt $" { pass "print buf\[0\]"}
478 -re ".*$prompt $" { fail "print buf\[0\]"}
479 default { fail "print buf\[0\]"}
480 }
481 send "print buf\[1\]\n"
482 expect {
483 -re ".*= 50.*$prompt $" { set y [expr $y+1]; pass "print buf\[1\]"}
484 -re ".*= 0.*$prompt $" { pass "print buf\[1\]"}
485 -re ".*$prompt $" { fail "print buf\[1\]"}
486 default { fail "print buf\[1\]"}
487 }
488 send "print buf\[2\]\n"
489 expect {
490 -re ".*= 51.*$prompt $" { set y [expr $y+1]; pass "print buf\[2\]"}
491 -re ".*= 0.*$prompt $" { pass "print buf\[2\]"}
492 -re ".*$prompt $" { fail "print buf\[2\]"}
493 default { fail "print buf\[2\]"}
494 }
495 send "print buf\[3\]\n"
496 expect {
497 -re ".*= 10.*$prompt $" { set y [expr $y+1]; pass "print buf\[3\]"}
498 -re ".*= 0.*$prompt $" { pass "print buf\[3\]"}
499 -re ".*$prompt $" { fail "print buf\[3\]" }
500 default { fail "print buf\[3\]" }
501 }
502
503 # Did we find what we were looking for? If not, flunk it.
504 if [expr $x==$y] then { pass $testname } else { fail "$testname (only triggered $x watchpoints, expected $y)"}
505
506 # Continue until we hit the finishing marker function.
507 # Make sure we hit no more watchpoints.
508 gdb_test "cont" "Continuing.*Breakpoint.*marker4 \\(\\).*" \
509 "continue to marker4"
510
511 # Disable everything so we can finish the program at full speed
512 gdb_test "disable" "" "disable in test_watchpoint_triggered_in_syscall"
513
514 gdb_test "cont" "Continuing.*Program exited normally.*" \
515 "continue to exit in test_watchpoint_triggered_in_syscall"
516 }
517 }
518
519 # Do a simple test of of watching through a pointer when the pointer
520 # itself changes. Should add some more complicated stuff here.
521
522 proc test_complex_watchpoint {} {
523 global prompt
524
525 if [runto marker4] then {
526 gdb_test "watch ptr1->val" ".*\[Ww\]atchpoint \[0-9\]*: ptr1->val"
527 gdb_test "break marker5" ".*Breakpoint.*"
528
529 gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ptr1->val.*Old value = 1.*New value = 2.*" "Test complex watchpoint"
530
531 # Continue until we hit the marker5 function.
532 # Make sure we hit no more watchpoints.
533
534 gdb_test "cont" "Continuing.*Breakpoint.*marker5 \\(\\).*" \
535 "did not trigger wrong watchpoint"
536
537 # Disable everything so we can finish the program at full speed
538 gdb_test "disable" "" "disable in test_complex_watchpoint"
539
540 gdb_test "cont" "Continuing.*Program exited normally.*" \
541 "continue to exit in test_complex_watchpoint"
542 }
543 }
544
545 # Start with a fresh gdb.
546
547 gdb_exit
548 gdb_start
549 gdb_reinitialize_dir $srcdir/$subdir
550 gdb_load $binfile
551
552 if [initialize] then {
553
554 test_simple_watchpoint
555
556 # The IDT/sim monitor only has 8 (!) open files, of which it uses
557 # 4 (!). So we have to make sure one program exits before
558 # starting another one.
559 if [istarget "mips-idt-*"] then {
560 gdb_exit
561 gdb_start
562 gdb_reinitialize_dir $srcdir/$subdir
563 gdb_load $binfile
564 initialize
565 }
566
567 test_disabling_watchpoints
568
569 # See above.
570 if [istarget "mips-idt-*"] then {
571 gdb_exit
572 gdb_start
573 gdb_reinitialize_dir $srcdir/$subdir
574 gdb_load $binfile
575 initialize
576 }
577
578 test_stepping
579
580 # See above.
581 if [istarget "mips-idt-*"] then {
582 gdb_exit
583 gdb_start
584 gdb_reinitialize_dir $srcdir/$subdir
585 gdb_load $binfile
586 initialize
587 }
588
589 # Only enabled for some targets merely because it has not been tested
590 # elsewhere.
591 # On sparc-sun-sunos4.1.3, GDB was running all the way to the marker4
592 # breakpoint before stopping for the watchpoint. I don't know why.
593 if {[istarget "hppa*-*-*"]} then {
594 test_watchpoint_triggered_in_syscall
595 }
596
597 # See above.
598 if [istarget "mips-idt-*"] then {
599 gdb_exit
600 gdb_start
601 gdb_reinitialize_dir $srcdir/$subdir
602 gdb_load $binfile
603 initialize
604 }
605
606 # Only enabled for some targets merely because it has not been tested
607 # elsewhere.
608 if {[istarget "hppa*-*-*"] || [istarget "sparc*-*-sunos*"]} then {
609 test_complex_watchpoint
610 }
611 }