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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [testsuite/] [gdb.base/] [watchpoint.exp] - Blame information for rev 24

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1 24 jeremybenn
# Copyright 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2007, 2008
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 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 .
16
 
17
# Please email any bugs, comments, and/or additions to this file to:
18
# bug-gdb@prep.ai.mit.edu
19
 
20
# This file was written by Fred Fish. (fnf@cygnus.com)
21
 
22
if $tracelevel then {
23
    strace $tracelevel
24
}
25
 
26
set prms_id 0
27
set bug_id 0
28
 
29
set testfile "watchpoint"
30
set srcfile ${testfile}.c
31
set binfile ${objdir}/${subdir}/${testfile}
32
 
33
set wp_set 1
34
 
35
if [get_compiler_info ${binfile}] {
36
    return -1
37
}
38
 
39
if  { [gdb_compile "${srcdir}/${subdir}/${srcfile}" "${binfile}" executable {debug}] != "" } {
40
     untested watchpoint.exp
41
     return -1
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
        gdb_test "p func1 ()" "= 73" \
378
            "calling function with watchpoint enabled"
379
 
380
        #
381
        # "finish" brings us back to main.
382
        # On some targets (e.g. alpha) gdb will stop from the finish in midline
383
        # of the marker1 call. This is due to register restoring code on
384
        # the alpha and might be caused by stack adjustment instructions
385
        # on other targets. In this case we will step once more.
386
        #
387
 
388
        send_gdb "finish\n"
389
        gdb_expect {
390
            -re "Run.*exit from.*marker1.* at" {
391
                pass "finish from marker1"
392
            }
393
            default { fail "finish from marker1 (timeout)" ; return }
394
        }
395
 
396
        gdb_expect {
397
            -re "marker1 \\(\\);.*$gdb_prompt $" {
398
                send_gdb "step\n"
399
                exp_continue
400
            }
401
            -re "func1 \\(\\);.*$gdb_prompt $" {
402
                pass "back at main from marker1"
403
            }
404
            -re ".*$gdb_prompt $" {
405
                fail "back at main from marker1"
406
            }
407
            default { fail "back at main from marker1 (timeout)" ; return }
408
        }
409
 
410
        gdb_test "next" "for \\(count = 0.*" "next to `for' in watchpoint.exp"
411
 
412
        # Now test that "until" works.  It's a bit tricky to test
413
        # "until", because compilers don't always arrange the code
414
        # exactly the same way, and we might get slightly different
415
        # sequences of statements.  But the following should be true
416
        # (if not it is a compiler or a debugger bug): The user who
417
        # does "until" at every statement of a loop should end up
418
        # stepping through the loop once, and the debugger should not
419
        # stop for any of the remaining iterations.
420
 
421
        gdb_test "until" "ival1 = count.*" "until to ival1 assignment"
422
        gdb_test "until" "ival3 = count.*" "until to ival3 assignment"
423
        send_gdb "until\n"
424
        gdb_expect {
425
            -re "(for \\(count = 0|\}).*$gdb_prompt $" {
426
                gdb_test "until" "ival1 = count; /. Outside loop ./" \
427
                    "until out of loop"
428
            }
429
            -re "ival1 = count; /. Outside loop ./.*$gdb_prompt $" {
430
                pass "until out of loop"
431
            }
432
            -re ".*$gdb_prompt $" {
433
                fail "until out of loop"
434
            }
435
            default { fail "until out of loop (timeout)" ; return }
436
        }
437
 
438
        gdb_test "step" "ival2 = count.*" "step to ival2 assignment"
439
    }
440
}
441
 
442
# Test stepping and other mundane operations with watchpoints enabled
443
proc test_watchpoint_triggered_in_syscall {} {
444
    global gdb_prompt
445
 
446
    # These tests won't work without printf support.
447
    if [gdb_skip_stdio_test "watchpoints triggered in syscall"] {
448
        return;
449
    }
450
    # Run until we get to the first marker function.
451
    set x 0
452
    set y 0
453
    set testname "Watch buffer passed to read syscall"
454
    if [runto marker2] then {
455
        gdb_test "watch buf\[0\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[0\\\]"
456
        gdb_test "watch buf\[1\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[1\\\]"
457
        gdb_test "watch buf\[2\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[2\\\]"
458
        gdb_test "watch buf\[3\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[3\\\]"
459
        gdb_test "watch buf\[4\]" ".*\[Ww\]atchpoint \[0-9\]*: buf\\\[4\\\]"
460
        gdb_test "break marker4" ".*Breakpoint.*"
461
 
462
        gdb_test "set doread = 1" ""
463
 
464
        # If we send_gdb "123\n" before gdb has switched the tty, then it goes
465
        # to gdb, not the inferior, and we lose.  So that is why we have
466
        # watchpoint.c prompt us, so we can wait for that prompt.
467
        send_gdb "continue\n";
468
        gdb_expect {
469
            -re "Continuing\\.\r\ntype stuff for buf now:" {
470
                pass "continue to read"
471
            }
472
            default {
473
                fail "continue to read";
474
                return ;
475
            }
476
        }
477
 
478
        send_gdb "123\n"
479
        gdb_expect {
480
            -re ".*\[Ww\]atchpoint.*buf\\\[0\\\].*Old value = 0.*New value = 49\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
481
            -re ".*\[Ww\]atchpoint.*buf\\\[1\\\].*Old value = 0.*New value = 50\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
482
            -re ".*\[Ww\]atchpoint.*buf\\\[2\\\].*Old value = 0.*New value = 51\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
483
            -re ".*\[Ww\]atchpoint.*buf\\\[3\\\].*Old value = 0.*New value = 10\[^\n\]*\n" { set x [expr $x+1] ; exp_continue }
484
            -re ".*$gdb_prompt $" { pass "sent 123" }
485
            timeout { fail "sent 123 (timeout)" }
486
        }
487
 
488
        # Examine the values in buf to see how many watchpoints we
489
        # should have printed.
490
        send_gdb "print buf\[0\]\n"
491
        gdb_expect {
492
            -re ".*= 49.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[0\]"}
493
            -re ".*= 0.*$gdb_prompt $" { pass "print buf\[0\]"}
494
            -re ".*$gdb_prompt $" { fail "print buf\[0\]"}
495
            default { fail "print buf\[0\]"}
496
        }
497
        send_gdb "print buf\[1\]\n"
498
        gdb_expect {
499
            -re ".*= 50.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[1\]"}
500
            -re ".*= 0.*$gdb_prompt $" { pass "print buf\[1\]"}
501
            -re ".*$gdb_prompt $" { fail "print buf\[1\]"}
502
            default { fail "print buf\[1\]"}
503
        }
504
        send_gdb "print buf\[2\]\n"
505
        gdb_expect {
506
            -re ".*= 51.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[2\]"}
507
            -re ".*= 0.*$gdb_prompt $" { pass "print buf\[2\]"}
508
            -re ".*$gdb_prompt $" { fail "print buf\[2\]"}
509
            default { fail "print buf\[2\]"}
510
        }
511
        send_gdb "print buf\[3\]\n"
512
        gdb_expect {
513
            -re ".*= 10.*$gdb_prompt $" { set y [expr $y+1]; pass "print buf\[3\]"}
514
            -re ".*= 0.*$gdb_prompt $" { pass "print buf\[3\]"}
515
            -re ".*$gdb_prompt $" { fail "print buf\[3\]" }
516
            default { fail "print buf\[3\]" }
517
        }
518
 
519
        # Did we find what we were looking for?  If not, flunk it.
520
        if [expr $x==$y] then { pass $testname } else { fail "$testname (only triggered $x watchpoints, expected $y)"}
521
 
522
        # Continue until we hit the finishing marker function.
523
        # Make sure we hit no more watchpoints.
524
        gdb_test "cont" "Continuing.*Breakpoint.*marker4 \\(\\).*" \
525
            "continue to marker4"
526
 
527
        # Disable everything so we can finish the program at full speed
528
        gdb_test "disable" "" "disable in test_watchpoint_triggered_in_syscall"
529
 
530
        if [target_info exists gdb,noresults] { return }
531
 
532
        gdb_continue_to_end "continue to exit in test_watchpoint_triggered_in_syscall"
533
    }
534
}
535
 
536
# Do a simple test of of watching through a pointer when the pointer
537
# itself changes.  Should add some more complicated stuff here.
538
 
539
proc test_complex_watchpoint {} {
540
    global gdb_prompt
541
 
542
    if [runto marker4] then {
543
        gdb_test "watch ptr1->val" ".*\[Ww\]atchpoint \[0-9\]*: ptr1->val"
544
        gdb_test "break marker5" ".*Breakpoint.*"
545
 
546
        gdb_test "cont" "Continuing.*\[Ww\]atchpoint.*ptr1->val.*Old value = 1.*New value = 2.*" "Test complex watchpoint"
547
 
548
        # Continue until we hit the marker5 function.
549
        # Make sure we hit no more watchpoints.
550
 
551
        gdb_test "cont" "Continuing.*Breakpoint.*marker5 \\(\\).*" \
552
            "did not trigger wrong watchpoint"
553
 
554
        # Test watches of things declared locally in a function.
555
        # In particular, test that a watch of stack-based things
556
        # is deleted when the stack-based things go out of scope.
557
        #
558
        gdb_test "disable" "" "disable in test_complex_watchpoint"
559
        gdb_test "break marker6" ".*Breakpoint.*"
560
        gdb_test "cont" "Continuing.*Breakpoint.*marker6 \\(\\).*" \
561
            "continue to marker6"
562
        gdb_test "break func2" ".*Breakpoint.*"
563
        gdb_test "cont" "Continuing.*func2.*"
564
 
565
        # Test a watch of a single stack-based variable, whose scope
566
        # is the function we're now in.  This should auto-delete when
567
        # execution exits the scope of the watchpoint.
568
        #
569
        gdb_test "watch local_a" ".*\[Ww\]atchpoint \[0-9\]*: local_a" "set local watch"
570
        gdb_test "cont" "\[Ww\]atchpoint.*local_a.*" "trigger local watch"
571
        gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" "self-delete local watch"
572
 
573
        gdb_test "cont" "Continuing.*func2.*"
574
        # We should be in "func2" again now.  Test a watch of an
575
        # expression which includes both a stack-based local and
576
        # something whose scope is larger than this invocation
577
        # of "func2".  This should also auto-delete.
578
        #
579
        gdb_test "watch local_a + ival5" ".*\[Ww\]atchpoint \[0-9\]*: local_a . ival5" \
580
                 "set partially local watch"
581
        gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
582
                 "trigger1 partially local watch"
583
        gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_a . ival5.*" \
584
                 "trigger2 partially local watch"
585
        gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
586
                 "self-delete partially local watch"
587
 
588
        # We should be in "func2" again now.  Test a watch of a
589
        # static (non-stack-based) local.  Since this has scope
590
        # across any invocations of "func2", it should not auto-
591
        # delete.
592
        #
593
        gdb_test "cont" "Continuing.*func2.*"
594
        gdb_test "watch static_b" ".*\[Ww\]atchpoint \[0-9\]*: static_b" \
595
                 "set static local watch"
596
        gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: static_b.*" \
597
                 "trigger static local watch"
598
        gdb_test "cont" "Continuing.*marker6 \\(\\).*" \
599
                 "continue after trigger static local watch"
600
        gdb_test "info break" ".*watchpoint.*static_b.*" \
601
                 "static local watch did not self-delete"
602
 
603
        # We should be in "recurser" now.  Test a watch of a stack-
604
        # based local.  Symbols mentioned in a watchpoint are bound
605
        # at watchpoint-creation.  Thus, a watch of a stack-based
606
        # local to a recursing function should be bound only to that
607
        # one invocation, and should not trigger for other invocations.
608
        #
609
        gdb_test "tbreak recurser" ".*Breakpoint.*"
610
        gdb_test "cont" "Continuing.*recurser.*"
611
        gdb_test "watch local_x" ".*\[Ww\]atchpoint \[0-9\]*: local_x" \
612
                 "set local watch in recursive call"
613
        gdb_test "cont" "Continuing.*\[Ww\]atchpoint .*: local_x.*New value = 2.*" \
614
                 "trigger local watch in recursive call"
615
        gdb_test "cont" "Continuing.*\[Ww\]atchpoint .* deleted because the program has left the block in.*which its expression is valid.*" \
616
                 "self-delete local watch in recursive call"
617
 
618
        # Disable everything so we can finish the program at full speed
619
        gdb_test "disable" "" "disable in test_complex_watchpoint"
620
 
621
        if [target_info exists gdb,noresults] { return }
622
 
623
        gdb_continue_to_end "continue to exit in test_complex_watchpoint"
624
    }
625
}
626
 
627
proc test_watchpoint_and_breakpoint {} {
628
    global gdb_prompt
629
 
630
    # This is a test for PR gdb/38, which involves setting a
631
    # watchpoint right after you've reached a breakpoint.
632
 
633
    if [runto func3] then {
634
        gdb_breakpoint [gdb_get_line_number "second x assignment"]
635
        gdb_continue_to_breakpoint "second x assignment"
636
        gdb_test "watch x" ".*atchpoint \[0-9\]+: x"
637
        gdb_test_multiple "next" "next after watch x" {
638
            -re ".*atchpoint \[0-9\]+: x\r\n\r\nOld value = 0\r\nNew value = 1\r\n.*$gdb_prompt $" {
639
                pass "next after watch x"
640
            }
641
            -re "\[0-9\]+\[\t \]+y = 1;\r\n$gdb_prompt $" {
642
                kfail "gdb/38" "next after watch x"
643
            }
644
        }
645
    }
646
}
647
 
648
# Start with a fresh gdb.
649
 
650
gdb_exit
651
gdb_start
652
gdb_reinitialize_dir $srcdir/$subdir
653
gdb_load $binfile
654
set prev_timeout $timeout
655
set timeout 600
656
verbose "Timeout now 600 sec.\n"
657
 
658
if [initialize] then {
659
 
660
    test_simple_watchpoint
661
 
662
    # The IDT/sim monitor only has 8 (!) open files, of which it uses
663
    # 4 (!).  So we have to make sure one program exits before
664
    # starting another one.
665
    if [istarget "mips-idt-*"] then {
666
        gdb_exit
667
        gdb_start
668
        gdb_reinitialize_dir $srcdir/$subdir
669
        gdb_load $binfile
670
        initialize
671
    }
672
 
673
    test_disabling_watchpoints
674
 
675
    # See above.
676
    if [istarget "mips-idt-*"] then {
677
        gdb_exit
678
        gdb_start
679
        gdb_reinitialize_dir $srcdir/$subdir
680
        gdb_load $binfile
681
        initialize
682
    }
683
 
684
    if ![target_info exists gdb,cannot_call_functions] {
685
        test_stepping
686
 
687
        # See above.
688
        if [istarget "mips-idt-*"] then {
689
            gdb_exit
690
            gdb_start
691
            gdb_reinitialize_dir $srcdir/$subdir
692
            gdb_load $binfile
693
            initialize
694
        }
695
    }
696
 
697
    # Only enabled for some targets merely because it has not been tested
698
    # elsewhere.
699
    # On sparc-sun-sunos4.1.3, GDB was running all the way to the marker4
700
    # breakpoint before stopping for the watchpoint.  I don't know why.
701
    if {[istarget "hppa*-*-*"]} then {
702
        test_watchpoint_triggered_in_syscall
703
    }
704
 
705
    # See above.
706
    if [istarget "mips-idt-*"] then {
707
        gdb_exit
708
        gdb_start
709
        gdb_reinitialize_dir $srcdir/$subdir
710
        gdb_load $binfile
711
        initialize
712
    }
713
 
714
    # Only enabled for some targets merely because it has not been tested
715
    # elsewhere.
716
    if {[istarget "hppa*-*-*"] || \
717
            [istarget "sparc*-*-sunos*"] || \
718
            [istarget "m32r-*-*"]} then {
719
        test_complex_watchpoint
720
    }
721
 
722
    # Verify that a user can force GDB to use "slow" watchpoints.
723
    # (This proves rather little on kernels that don't support
724
    # fast watchpoints, but still...)
725
    #
726
    if ![runto_main] then { fail "watch tests suppressed" }
727
 
728
    send_gdb "set can-use-hw-watchpoints 0\n"
729
    gdb_expect {
730
      -re "$gdb_prompt $"\
731
              {pass "disable fast watches"}
732
      timeout {fail "(timeout) disable fast watches"}
733
    }
734
    send_gdb "show can-use-hw-watchpoints\n"
735
    gdb_expect {
736
      -re "Debugger's willingness to use watchpoint hardware is 0.*$gdb_prompt $"\
737
              {pass "show disable fast watches"}
738
      -re "$gdb_prompt $"\
739
              {fail "show disable fast watches"}
740
      timeout {fail "(timeout) show disable fast watches"}
741
    }
742
    send_gdb "watch ival3 if  count > 1\n"
743
    gdb_expect {
744
      -re "Watchpoint \[0-9\]*: ival3.*$gdb_prompt $"\
745
              {pass "set slow conditional watch"}
746
      -re "$gdb_prompt $"\
747
              {fail "set slow conditional watch"}
748
      timeout {fail "(timeout) set slow conditional watch"}
749
    }
750
    send_gdb "continue\n"
751
    gdb_expect {
752
      -re "Watchpoint \[0-9\]*: ival3.*Old value = 1.*New value = 2.*$gdb_prompt $"\
753
              {pass "trigger slow conditional watch"}
754
      -re "$gdb_prompt $"\
755
              {fail "trigger slow conditional watch"}
756
      timeout {fail "(timeout) trigger slow conditional watch"}
757
    }
758
 
759
    # We've explicitly disabled hardware watches.  Verify that GDB
760
    # refrains from using them.
761
    #
762
    send_gdb "rwatch ival3\n"
763
    gdb_expect {
764
      -re "Expression cannot be implemented with read/access watchpoint..*$gdb_prompt $"\
765
              {pass "rwatch disallowed when can-set-hw-watchpoints cleared"}
766
      -re "$gdb_prompt $"\
767
              {fail "rwatch disallowed when can-set-hw-watchpoints cleared"}
768
      timeout {fail "(timeout) rwatch disallowed when can-use-hw-watchpoints cleared"}
769
    }
770
 
771
    # Read- and access watchpoints are unsupported on HP-UX.  Verify
772
    # that GDB gracefully responds to requests to create them.
773
    #
774
    if [istarget "hppa*-*-hpux*"] then {
775
      send_gdb "set can-use-hw-watchpoints 1\n"
776
      gdb_expect {
777
        -re "$gdb_prompt $"\
778
                {pass "enable fast watches"}
779
        timeout {fail "(timeout) enable fast watches"}
780
      }
781
      send_gdb "rwatch ival3\n"
782
      gdb_expect {
783
        -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\
784
                {pass "read watches disallowed"}
785
        -re "$gdb_prompt $"\
786
                {fail "read watches disallowed"}
787
        timeout {fail "(timeout) read watches disallowed"}
788
      }
789
 
790
      send_gdb "awatch ival3\n"
791
      gdb_expect {
792
        -re "Target does not have this type of hardware watchpoint support.*$gdb_prompt $"\
793
                {pass "access watches disallowed"}
794
        -re "$gdb_prompt $"\
795
                {fail "access watches disallowed"}
796
        timeout {fail "(timeout) access watches disallowed"}
797
      }
798
    }
799
 
800
    # See above.
801
    if [istarget "mips-idt-*"] then {
802
        gdb_exit
803
        gdb_start
804
        gdb_reinitialize_dir $srcdir/$subdir
805
        gdb_load $binfile
806
        initialize
807
    }
808
 
809
    test_watchpoint_and_breakpoint
810
}
811
 
812
# Restore old timeout
813
set timeout $prev_timeout
814
verbose "Timeout now $timeout sec.\n"

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