1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
|
/* Data structures and API for event locations in GDB.
Copyright (C) 2013-2022 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbsupport/gdb_assert.h"
#include "location.h"
#include "symtab.h"
#include "language.h"
#include "linespec.h"
#include "cli/cli-utils.h"
#include "probe.h"
#include "cp-support.h"
#include <ctype.h>
#include <string.h>
/* An event location used to set a stop event in the inferior.
This structure is an amalgam of the various ways
to specify where a stop event should be set. */
struct event_location
{
/* The type of this breakpoint specification. */
enum event_location_type type;
#define EL_TYPE(P) (P)->type
union
{
/* A probe. */
char *addr_string;
#define EL_PROBE(P) ((P)->u.addr_string)
/* A "normal" linespec. */
struct linespec_location linespec_location;
#define EL_LINESPEC(P) (&(P)->u.linespec_location)
/* An address in the inferior. */
CORE_ADDR address;
#define EL_ADDRESS(P) (P)->u.address
/* An explicit location. */
struct explicit_location explicit_loc;
#define EL_EXPLICIT(P) (&((P)->u.explicit_loc))
} u;
/* Cached string representation of this location. This is used, e.g., to
save stop event locations to file. Malloc'd. */
char *as_string;
#define EL_STRING(P) ((P)->as_string)
};
/* See description in location.h. */
enum event_location_type
event_location_type (const struct event_location *location)
{
return EL_TYPE (location);
}
/* See description in location.h. */
void
initialize_explicit_location (struct explicit_location *explicit_loc)
{
memset (explicit_loc, 0, sizeof (struct explicit_location));
explicit_loc->line_offset.sign = LINE_OFFSET_UNKNOWN;
explicit_loc->func_name_match_type = symbol_name_match_type::WILD;
}
/* See description in location.h. */
event_location_up
new_linespec_location (const char **linespec,
symbol_name_match_type match_type)
{
struct event_location *location;
location = XCNEW (struct event_location);
EL_TYPE (location) = LINESPEC_LOCATION;
EL_LINESPEC (location)->match_type = match_type;
if (*linespec != NULL)
{
const char *p;
const char *orig = *linespec;
linespec_lex_to_end (linespec);
p = remove_trailing_whitespace (orig, *linespec);
if ((p - orig) > 0)
EL_LINESPEC (location)->spec_string = savestring (orig, p - orig);
}
return event_location_up (location);
}
/* See description in location.h. */
const linespec_location *
get_linespec_location (const struct event_location *location)
{
gdb_assert (EL_TYPE (location) == LINESPEC_LOCATION);
return EL_LINESPEC (location);
}
/* See description in location.h. */
event_location_up
new_address_location (CORE_ADDR addr, const char *addr_string,
int addr_string_len)
{
struct event_location *location;
location = XCNEW (struct event_location);
EL_TYPE (location) = ADDRESS_LOCATION;
EL_ADDRESS (location) = addr;
if (addr_string != NULL)
EL_STRING (location) = xstrndup (addr_string, addr_string_len);
return event_location_up (location);
}
/* See description in location.h. */
CORE_ADDR
get_address_location (const struct event_location *location)
{
gdb_assert (EL_TYPE (location) == ADDRESS_LOCATION);
return EL_ADDRESS (location);
}
/* See description in location.h. */
const char *
get_address_string_location (const struct event_location *location)
{
gdb_assert (EL_TYPE (location) == ADDRESS_LOCATION);
return EL_STRING (location);
}
/* See description in location.h. */
event_location_up
new_probe_location (const char *probe)
{
struct event_location *location;
location = XCNEW (struct event_location);
EL_TYPE (location) = PROBE_LOCATION;
if (probe != NULL)
EL_PROBE (location) = xstrdup (probe);
return event_location_up (location);
}
/* See description in location.h. */
const char *
get_probe_location (const struct event_location *location)
{
gdb_assert (EL_TYPE (location) == PROBE_LOCATION);
return EL_PROBE (location);
}
/* See description in location.h. */
event_location_up
new_explicit_location (const struct explicit_location *explicit_loc)
{
struct event_location tmp;
memset (&tmp, 0, sizeof (struct event_location));
EL_TYPE (&tmp) = EXPLICIT_LOCATION;
initialize_explicit_location (EL_EXPLICIT (&tmp));
if (explicit_loc != NULL)
{
EL_EXPLICIT (&tmp)->func_name_match_type
= explicit_loc->func_name_match_type;
if (explicit_loc->source_filename != NULL)
{
EL_EXPLICIT (&tmp)->source_filename
= explicit_loc->source_filename;
}
if (explicit_loc->function_name != NULL)
EL_EXPLICIT (&tmp)->function_name
= explicit_loc->function_name;
if (explicit_loc->label_name != NULL)
EL_EXPLICIT (&tmp)->label_name = explicit_loc->label_name;
if (explicit_loc->line_offset.sign != LINE_OFFSET_UNKNOWN)
EL_EXPLICIT (&tmp)->line_offset = explicit_loc->line_offset;
}
return copy_event_location (&tmp);
}
/* See description in location.h. */
struct explicit_location *
get_explicit_location (struct event_location *location)
{
gdb_assert (EL_TYPE (location) == EXPLICIT_LOCATION);
return EL_EXPLICIT (location);
}
/* See description in location.h. */
const struct explicit_location *
get_explicit_location_const (const struct event_location *location)
{
gdb_assert (EL_TYPE (location) == EXPLICIT_LOCATION);
return EL_EXPLICIT (location);
}
/* This convenience function returns a malloc'd string which
represents the location in EXPLICIT_LOC.
AS_LINESPEC is non-zero if this string should be a linespec.
Otherwise it will be output in explicit form. */
static char *
explicit_to_string_internal (int as_linespec,
const struct explicit_location *explicit_loc)
{
int need_space = 0;
char space = as_linespec ? ':' : ' ';
string_file buf;
if (explicit_loc->source_filename != NULL)
{
if (!as_linespec)
buf.puts ("-source ");
buf.puts (explicit_loc->source_filename);
need_space = 1;
}
if (explicit_loc->function_name != NULL)
{
if (need_space)
buf.putc (space);
if (explicit_loc->func_name_match_type == symbol_name_match_type::FULL)
buf.puts ("-qualified ");
if (!as_linespec)
buf.puts ("-function ");
buf.puts (explicit_loc->function_name);
need_space = 1;
}
if (explicit_loc->label_name != NULL)
{
if (need_space)
buf.putc (space);
if (!as_linespec)
buf.puts ("-label ");
buf.puts (explicit_loc->label_name);
need_space = 1;
}
if (explicit_loc->line_offset.sign != LINE_OFFSET_UNKNOWN)
{
if (need_space)
buf.putc (space);
if (!as_linespec)
buf.puts ("-line ");
buf.printf ("%s%d",
(explicit_loc->line_offset.sign == LINE_OFFSET_NONE ? ""
: (explicit_loc->line_offset.sign
== LINE_OFFSET_PLUS ? "+" : "-")),
explicit_loc->line_offset.offset);
}
return xstrdup (buf.c_str ());
}
/* See description in location.h. */
char *
explicit_location_to_string (const struct explicit_location *explicit_loc)
{
return explicit_to_string_internal (0, explicit_loc);
}
/* See description in location.h. */
char *
explicit_location_to_linespec (const struct explicit_location *explicit_loc)
{
return explicit_to_string_internal (1, explicit_loc);
}
/* See description in location.h. */
event_location_up
copy_event_location (const struct event_location *src)
{
struct event_location *dst;
dst = XCNEW (struct event_location);
EL_TYPE (dst) = EL_TYPE (src);
if (EL_STRING (src) != NULL)
EL_STRING (dst) = xstrdup (EL_STRING (src));
switch (EL_TYPE (src))
{
case LINESPEC_LOCATION:
EL_LINESPEC (dst)->match_type = EL_LINESPEC (src)->match_type;
if (EL_LINESPEC (src)->spec_string != NULL)
EL_LINESPEC (dst)->spec_string
= xstrdup (EL_LINESPEC (src)->spec_string);
break;
case ADDRESS_LOCATION:
EL_ADDRESS (dst) = EL_ADDRESS (src);
break;
case EXPLICIT_LOCATION:
EL_EXPLICIT (dst)->func_name_match_type
= EL_EXPLICIT (src)->func_name_match_type;
if (EL_EXPLICIT (src)->source_filename != NULL)
EL_EXPLICIT (dst)->source_filename
= xstrdup (EL_EXPLICIT (src)->source_filename);
if (EL_EXPLICIT (src)->function_name != NULL)
EL_EXPLICIT (dst)->function_name
= xstrdup (EL_EXPLICIT (src)->function_name);
if (EL_EXPLICIT (src)->label_name != NULL)
EL_EXPLICIT (dst)->label_name = xstrdup (EL_EXPLICIT (src)->label_name);
EL_EXPLICIT (dst)->line_offset = EL_EXPLICIT (src)->line_offset;
break;
case PROBE_LOCATION:
if (EL_PROBE (src) != NULL)
EL_PROBE (dst) = xstrdup (EL_PROBE (src));
break;
default:
gdb_assert_not_reached ("unknown event location type");
}
return event_location_up (dst);
}
void
event_location_deleter::operator() (event_location *location) const
{
if (location != NULL)
{
xfree (EL_STRING (location));
switch (EL_TYPE (location))
{
case LINESPEC_LOCATION:
xfree (EL_LINESPEC (location)->spec_string);
break;
case ADDRESS_LOCATION:
/* Nothing to do. */
break;
case EXPLICIT_LOCATION:
xfree (EL_EXPLICIT (location)->source_filename);
xfree (EL_EXPLICIT (location)->function_name);
xfree (EL_EXPLICIT (location)->label_name);
break;
case PROBE_LOCATION:
xfree (EL_PROBE (location));
break;
default:
gdb_assert_not_reached ("unknown event location type");
}
xfree (location);
}
}
/* See description in location.h. */
const char *
event_location_to_string (struct event_location *location)
{
if (EL_STRING (location) == NULL)
{
switch (EL_TYPE (location))
{
case LINESPEC_LOCATION:
if (EL_LINESPEC (location)->spec_string != NULL)
{
linespec_location *ls = EL_LINESPEC (location);
if (ls->match_type == symbol_name_match_type::FULL)
{
EL_STRING (location)
= concat ("-qualified ", ls->spec_string, (char *) NULL);
}
else
EL_STRING (location) = xstrdup (ls->spec_string);
}
break;
case ADDRESS_LOCATION:
{
const char *addr_string
= core_addr_to_string (EL_ADDRESS (location));
EL_STRING (location)
= xstrprintf ("*%s", addr_string).release ();
}
break;
case EXPLICIT_LOCATION:
EL_STRING (location)
= explicit_location_to_string (EL_EXPLICIT (location));
break;
case PROBE_LOCATION:
EL_STRING (location) = xstrdup (EL_PROBE (location));
break;
default:
gdb_assert_not_reached ("unknown event location type");
}
}
return EL_STRING (location);
}
/* Find an instance of the quote character C in the string S that is
outside of all single- and double-quoted strings (i.e., any quoting
other than C). */
static const char *
find_end_quote (const char *s, char end_quote_char)
{
/* zero if we're not in quotes;
'"' if we're in a double-quoted string;
'\'' if we're in a single-quoted string. */
char nested_quote_char = '\0';
for (const char *scan = s; *scan != '\0'; scan++)
{
if (nested_quote_char != '\0')
{
if (*scan == nested_quote_char)
nested_quote_char = '\0';
else if (scan[0] == '\\' && *(scan + 1) != '\0')
scan++;
}
else if (*scan == end_quote_char && nested_quote_char == '\0')
return scan;
else if (*scan == '"' || *scan == '\'')
nested_quote_char = *scan;
}
return 0;
}
/* A lexer for explicit locations. This function will advance INP
past any strings that it lexes. Returns a malloc'd copy of the
lexed string or NULL if no lexing was done. */
static gdb::unique_xmalloc_ptr<char>
explicit_location_lex_one (const char **inp,
const struct language_defn *language,
explicit_completion_info *completion_info)
{
const char *start = *inp;
if (*start == '\0')
return NULL;
/* If quoted, skip to the ending quote. */
if (strchr (get_gdb_linespec_parser_quote_characters (), *start))
{
if (completion_info != NULL)
completion_info->quoted_arg_start = start;
const char *end = find_end_quote (start + 1, *start);
if (end == NULL)
{
if (completion_info == NULL)
error (_("Unmatched quote, %s."), start);
end = start + strlen (start);
*inp = end;
return gdb::unique_xmalloc_ptr<char> (savestring (start + 1,
*inp - start - 1));
}
if (completion_info != NULL)
completion_info->quoted_arg_end = end;
*inp = end + 1;
return gdb::unique_xmalloc_ptr<char> (savestring (start + 1,
*inp - start - 2));
}
/* If the input starts with '-' or '+', the string ends with the next
whitespace or comma. */
if (*start == '-' || *start == '+')
{
while (*inp[0] != '\0' && *inp[0] != ',' && !isspace (*inp[0]))
++(*inp);
}
else
{
/* Handle numbers first, stopping at the next whitespace or ','. */
while (isdigit (*inp[0]))
++(*inp);
if (*inp[0] == '\0' || isspace (*inp[0]) || *inp[0] == ',')
return gdb::unique_xmalloc_ptr<char> (savestring (start,
*inp - start));
/* Otherwise stop at the next occurrence of whitespace, '\0',
keyword, or ','. */
*inp = start;
while ((*inp)[0]
&& (*inp)[0] != ','
&& !(isspace ((*inp)[0])
|| linespec_lexer_lex_keyword (&(*inp)[1])))
{
/* Special case: C++ operator,. */
if (language->la_language == language_cplus
&& startswith (*inp, CP_OPERATOR_STR))
(*inp) += CP_OPERATOR_LEN;
++(*inp);
}
}
if (*inp - start > 0)
return gdb::unique_xmalloc_ptr<char> (savestring (start, *inp - start));
return NULL;
}
/* Return true if COMMA points past "operator". START is the start of
the line that COMMAND points to, hence when reading backwards, we
must not read any character before START. */
static bool
is_cp_operator (const char *start, const char *comma)
{
if (comma != NULL
&& (comma - start) >= CP_OPERATOR_LEN)
{
const char *p = comma;
while (p > start && isspace (p[-1]))
p--;
if (p - start >= CP_OPERATOR_LEN)
{
p -= CP_OPERATOR_LEN;
if (strncmp (p, CP_OPERATOR_STR, CP_OPERATOR_LEN) == 0
&& (p == start
|| !(isalnum (p[-1]) || p[-1] == '_')))
{
return true;
}
}
}
return false;
}
/* When scanning the input string looking for the next explicit
location option/delimiter, we jump to the next option by looking
for ",", and "-". Such a character can also appear in C++ symbols
like "operator," and "operator-". So when we find such a
character, we call this function to check if we found such a
symbol, meaning we had a false positive for an option string. In
that case, we keep looking for the next delimiter, until we find
one that is not a false positive, or we reach end of string. FOUND
is the character that scanning found (either '-' or ','), and START
is the start of the line that FOUND points to, hence when reading
backwards, we must not read any character before START. Returns a
pointer to the next non-false-positive delimiter character, or NULL
if none was found. */
static const char *
skip_op_false_positives (const char *start, const char *found)
{
while (found != NULL && is_cp_operator (start, found))
{
if (found[0] == '-' && found[1] == '-')
start = found + 2;
else
start = found + 1;
found = find_toplevel_char (start, *found);
}
return found;
}
/* Assuming both FIRST and NEW_TOK point into the same string, return
the pointer that is closer to the start of the string. If FIRST is
NULL, returns NEW_TOK. If NEW_TOK is NULL, returns FIRST. */
static const char *
first_of (const char *first, const char *new_tok)
{
if (first == NULL)
return new_tok;
else if (new_tok != NULL && new_tok < first)
return new_tok;
else
return first;
}
/* A lexer for functions in explicit locations. This function will
advance INP past a function until the next option, or until end of
string. Returns a malloc'd copy of the lexed string or NULL if no
lexing was done. */
static gdb::unique_xmalloc_ptr<char>
explicit_location_lex_one_function (const char **inp,
const struct language_defn *language,
explicit_completion_info *completion_info)
{
const char *start = *inp;
if (*start == '\0')
return NULL;
/* If quoted, skip to the ending quote. */
if (strchr (get_gdb_linespec_parser_quote_characters (), *start))
{
char quote_char = *start;
/* If the input is not an Ada operator, skip to the matching
closing quote and return the string. */
if (!(language->la_language == language_ada
&& quote_char == '\"' && is_ada_operator (start)))
{
if (completion_info != NULL)
completion_info->quoted_arg_start = start;
const char *end = find_toplevel_char (start + 1, quote_char);
if (end == NULL)
{
if (completion_info == NULL)
error (_("Unmatched quote, %s."), start);
end = start + strlen (start);
*inp = end;
char *saved = savestring (start + 1, *inp - start - 1);
return gdb::unique_xmalloc_ptr<char> (saved);
}
if (completion_info != NULL)
completion_info->quoted_arg_end = end;
*inp = end + 1;
char *saved = savestring (start + 1, *inp - start - 2);
return gdb::unique_xmalloc_ptr<char> (saved);
}
}
const char *comma = find_toplevel_char (start, ',');
/* If we have "-function -myfunction", or perhaps better example,
"-function -[BasicClass doIt]" (objc selector), treat
"-myfunction" as the function name. I.e., skip the first char if
it is an hyphen. Don't skip the first char always, because we
may have C++ "operator<", and find_toplevel_char needs to see the
'o' in that case. */
const char *hyphen
= (*start == '-'
? find_toplevel_char (start + 1, '-')
: find_toplevel_char (start, '-'));
/* Check for C++ "operator," and "operator-". */
comma = skip_op_false_positives (start, comma);
hyphen = skip_op_false_positives (start, hyphen);
/* Pick the one that appears first. */
const char *end = first_of (hyphen, comma);
/* See if a linespec keyword appears first. */
const char *s = start;
const char *ws = find_toplevel_char (start, ' ');
while (ws != NULL && linespec_lexer_lex_keyword (ws + 1) == NULL)
{
s = ws + 1;
ws = find_toplevel_char (s, ' ');
}
if (ws != NULL)
end = first_of (end, ws + 1);
/* If we don't have any terminator, then take the whole string. */
if (end == NULL)
end = start + strlen (start);
/* Trim whitespace at the end. */
while (end > start && end[-1] == ' ')
end--;
*inp = end;
if (*inp - start > 0)
return gdb::unique_xmalloc_ptr<char> (savestring (start, *inp - start));
return NULL;
}
/* See description in location.h. */
event_location_up
string_to_explicit_location (const char **argp,
const struct language_defn *language,
explicit_completion_info *completion_info)
{
event_location_up location;
/* It is assumed that input beginning with '-' and a non-digit
character is an explicit location. "-p" is reserved, though,
for probe locations. */
if (argp == NULL
|| *argp == NULL
|| *argp[0] != '-'
|| !isalpha ((*argp)[1])
|| ((*argp)[0] == '-' && (*argp)[1] == 'p'))
return NULL;
location = new_explicit_location (NULL);
/* Process option/argument pairs. dprintf_command
requires that processing stop on ','. */
while ((*argp)[0] != '\0' && (*argp)[0] != ',')
{
int len;
const char *start;
/* Clear these on each iteration, since they should be filled
with info about the last option. */
if (completion_info != NULL)
{
completion_info->quoted_arg_start = NULL;
completion_info->quoted_arg_end = NULL;
}
/* If *ARGP starts with a keyword, stop processing
options. */
if (linespec_lexer_lex_keyword (*argp) != NULL)
break;
/* Mark the start of the string in case we need to rewind. */
start = *argp;
if (completion_info != NULL)
completion_info->last_option = start;
/* Get the option string. */
gdb::unique_xmalloc_ptr<char> opt
= explicit_location_lex_one (argp, language, NULL);
/* Use the length of the option to allow abbreviations. */
len = strlen (opt.get ());
/* Get the argument string. */
*argp = skip_spaces (*argp);
/* All options have a required argument. Checking for this
required argument is deferred until later. */
gdb::unique_xmalloc_ptr<char> oarg;
/* True if we have an argument. This is required because we'll
move from OARG before checking whether we have an
argument. */
bool have_oarg = false;
/* True if the option needs an argument. */
bool need_oarg = false;
/* Convenience to consistently set both OARG/HAVE_OARG from
ARG. */
auto set_oarg = [&] (gdb::unique_xmalloc_ptr<char> arg)
{
if (completion_info != NULL)
{
/* We do this here because the set of options that take
arguments matches the set of explicit location
options. */
completion_info->saw_explicit_location_option = true;
}
oarg = std::move (arg);
have_oarg = oarg != NULL;
need_oarg = true;
};
if (strncmp (opt.get (), "-source", len) == 0)
{
set_oarg (explicit_location_lex_one (argp, language,
completion_info));
EL_EXPLICIT (location)->source_filename = oarg.release ();
}
else if (strncmp (opt.get (), "-function", len) == 0)
{
set_oarg (explicit_location_lex_one_function (argp, language,
completion_info));
EL_EXPLICIT (location)->function_name = oarg.release ();
}
else if (strncmp (opt.get (), "-qualified", len) == 0)
{
EL_EXPLICIT (location)->func_name_match_type
= symbol_name_match_type::FULL;
}
else if (strncmp (opt.get (), "-line", len) == 0)
{
set_oarg (explicit_location_lex_one (argp, language, NULL));
*argp = skip_spaces (*argp);
if (have_oarg)
{
EL_EXPLICIT (location)->line_offset
= linespec_parse_line_offset (oarg.get ());
continue;
}
}
else if (strncmp (opt.get (), "-label", len) == 0)
{
set_oarg (explicit_location_lex_one (argp, language, completion_info));
EL_EXPLICIT (location)->label_name = oarg.release ();
}
/* Only emit an "invalid argument" error for options
that look like option strings. */
else if (opt.get ()[0] == '-' && !isdigit (opt.get ()[1]))
{
if (completion_info == NULL)
error (_("invalid explicit location argument, \"%s\""), opt.get ());
}
else
{
/* End of the explicit location specification.
Stop parsing and return whatever explicit location was
parsed. */
*argp = start;
break;
}
*argp = skip_spaces (*argp);
/* It's a little lame to error after the fact, but in this
case, it provides a much better user experience to issue
the "invalid argument" error before any missing
argument error. */
if (need_oarg && !have_oarg && completion_info == NULL)
error (_("missing argument for \"%s\""), opt.get ());
}
/* One special error check: If a source filename was given
without offset, function, or label, issue an error. */
if (EL_EXPLICIT (location)->source_filename != NULL
&& EL_EXPLICIT (location)->function_name == NULL
&& EL_EXPLICIT (location)->label_name == NULL
&& (EL_EXPLICIT (location)->line_offset.sign == LINE_OFFSET_UNKNOWN)
&& completion_info == NULL)
{
error (_("Source filename requires function, label, or "
"line offset."));
}
return location;
}
/* See description in location.h. */
event_location_up
string_to_event_location_basic (const char **stringp,
const struct language_defn *language,
symbol_name_match_type match_type)
{
event_location_up location;
const char *cs;
/* Try the input as a probe spec. */
cs = *stringp;
if (cs != NULL && probe_linespec_to_static_ops (&cs) != NULL)
{
location = new_probe_location (*stringp);
*stringp += strlen (*stringp);
}
else
{
/* Try an address location. */
if (*stringp != NULL && **stringp == '*')
{
const char *arg, *orig;
CORE_ADDR addr;
orig = arg = *stringp;
addr = linespec_expression_to_pc (&arg);
location = new_address_location (addr, orig, arg - orig);
*stringp += arg - orig;
}
else
{
/* Everything else is a linespec. */
location = new_linespec_location (stringp, match_type);
}
}
return location;
}
/* See description in location.h. */
event_location_up
string_to_event_location (const char **stringp,
const struct language_defn *language,
symbol_name_match_type match_type)
{
const char *arg, *orig;
/* Try an explicit location. */
orig = arg = *stringp;
event_location_up location = string_to_explicit_location (&arg, language, NULL);
if (location != NULL)
{
/* It was a valid explicit location. Advance STRINGP to
the end of input. */
*stringp += arg - orig;
/* If the user really specified a location, then we're done. */
if (!event_location_empty_p (location.get ()))
return location;
/* Otherwise, the user _only_ specified optional flags like
"-qualified", otherwise string_to_explicit_location would
have thrown an error. Save the flags for "basic" linespec
parsing below and discard the explicit location. */
match_type = EL_EXPLICIT (location)->func_name_match_type;
}
/* Everything else is a "basic" linespec, address, or probe
location. */
return string_to_event_location_basic (stringp, language, match_type);
}
/* See description in location.h. */
int
event_location_empty_p (const struct event_location *location)
{
switch (EL_TYPE (location))
{
case LINESPEC_LOCATION:
/* Linespecs are never "empty." (NULL is a valid linespec) */
return 0;
case ADDRESS_LOCATION:
return 0;
case EXPLICIT_LOCATION:
return (EL_EXPLICIT (location)->source_filename == NULL
&& EL_EXPLICIT (location)->function_name == NULL
&& EL_EXPLICIT (location)->label_name == NULL
&& (EL_EXPLICIT (location)->line_offset.sign
== LINE_OFFSET_UNKNOWN));
case PROBE_LOCATION:
return EL_PROBE (location) == NULL;
default:
gdb_assert_not_reached ("unknown event location type");
}
}
/* See description in location.h. */
void
set_event_location_string (struct event_location *location,
const char *string)
{
xfree (EL_STRING (location));
EL_STRING (location) = string == NULL ? NULL : xstrdup (string);
}
|