-
Notifications
You must be signed in to change notification settings - Fork 0
/
command.y
1692 lines (1502 loc) · 37.9 KB
/
command.y
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
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* command.y - yacc/bison parser for debugger commands.
*/
/*
* Copyright (C) 2004, 2010, 2011 the Free Software Foundation, Inc.
*
* This file is part of GAWK, the GNU implementation of the
* AWK Programming Language.
*
* GAWK 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 2 of the License, or
* (at your option) any later version.
*
* GAWK 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*/
%{
#include "awk.h"
#include "cmd.h"
#if 0
#define YYDEBUG 12
int yydebug = 2;
#endif
static int yylex(void);
static void yyerror(const char *mesg, ...);
static int find_command(const char *token, size_t toklen);
static bool want_nodeval = false;
static int cmd_idx = -1; /* index of current command in cmd table */
static int repeat_idx = -1; /* index of last repeatable command in command table */
static CMDARG *arg_list = NULL; /* list of arguments */
static long errcount = 0;
static char *lexptr_begin = NULL;
static bool in_commands = false;
static int num_dim;
static bool in_eval = false;
static const char start_EVAL[] = "function @eval(){";
static const char end_EVAL[] = "}";
static CMDARG *append_statement(CMDARG *stmt_list, char *stmt);
static char *next_word(char *p, int len, char **endp);
static NODE *concat_args(CMDARG *a, int count);
#ifdef HAVE_LIBREADLINE
static void history_expand_line(char **line);
static char *command_generator(const char *text, int state);
static char *srcfile_generator(const char *text, int state);
static char *argument_generator(const char *text, int state);
static char *variable_generator(const char *text, int state);
extern char *option_generator(const char *text, int state);
static int this_cmd = D_illegal;
#else
#define history_expand_line(p) /* nothing */
static int rl_inhibit_completion; /* dummy variable */
#endif
struct argtoken {
const char *name;
enum argtype cmd;
enum nametypeval value;
};
/*
* These two should be static, but there are some compilers that
* don't like the static keyword with an empty size. Therefore give
* them names that are less likely to conflict with the rest of gawk.
*/
#define argtab zz_debug_argtab
#define cmdtab zz_debug_cmdtab
extern struct argtoken argtab[];
extern struct cmdtoken cmdtab[];
static CMDARG *mk_cmdarg(enum argtype type);
static void append_cmdarg(CMDARG *arg);
static int find_argument(CMDARG *arg);
#define YYSTYPE CMDARG *
%}
%token D_BACKTRACE D_BREAK D_CLEAR D_CONTINUE D_DELETE D_DISABLE D_DOWN
%token D_ENABLE D_FINISH D_FRAME D_HELP D_IGNORE D_INFO D_LIST
%token D_NEXT D_NEXTI D_PRINT D_PRINTF D_QUIT D_RETURN D_RUN D_SET
%token D_STEP D_STEPI D_TBREAK D_UP D_UNTIL
%token D_DISPLAY D_UNDISPLAY D_WATCH D_UNWATCH
%token D_DUMP D_TRACE
%token D_INT D_STRING D_NODE D_VARIABLE
%token D_OPTION D_COMMANDS D_END D_SILENT D_SOURCE
%token D_SAVE D_EVAL D_CONDITION
%token D_STATEMENT
%%
input
: /* empty */
| input line
{
cmd_idx = -1;
want_nodeval = false;
if (lexptr_begin != NULL) {
if (input_from_tty && lexptr_begin[0] != '\0')
add_history(lexptr_begin);
efree(lexptr_begin);
lexptr_begin = NULL;
}
if (arg_list != NULL) {
free_cmdarg(arg_list);
arg_list = NULL;
}
}
;
line
: nls
| command nls
{
if (errcount == 0 && cmd_idx >= 0) {
Func_cmd cmdfunc;
bool terminate = false;
CMDARG *args;
int ctype = 0;
ctype = cmdtab[cmd_idx].type;
/* a blank line repeats previous command
* (list, next, nexti, step, stepi and continue without arguments).
* save the index in the command table; used in yylex
*/
if ((ctype == D_list
|| ctype == D_next
|| ctype == D_step
|| ctype == D_nexti
|| ctype == D_stepi
|| ctype == D_continue)
&& arg_list == NULL
&& ! in_commands
&& input_from_tty
)
repeat_idx = cmd_idx;
else
repeat_idx = -1;
/* call the command handler; reset the globals arg_list, cmd_idx,
* since this handler could invoke yyparse again.
* call do_commands for the list of commands in `commands';
* arg_list isn't freed on return.
*/
cmdfunc = cmdtab[cmd_idx].cf_ptr;
if (in_commands)
cmdfunc = do_commands;
cmd_idx = -1;
want_nodeval = false;
args = arg_list;
arg_list = NULL;
terminate = (*cmdfunc)(args, ctype);
if (! in_commands || ctype == D_commands)
free_cmdarg(args);
if (terminate)
YYACCEPT;
}
}
| error nls
{
yyerrok;
}
;
control_cmd
: D_CONTINUE
| D_NEXT
| D_NEXTI
| D_STEP
| D_STEPI
;
d_cmd
: D_UNDISPLAY
| D_UNWATCH
| D_DISABLE
| D_DELETE
;
frame_cmd
: D_UP
| D_DOWN
| D_BACKTRACE
| D_FRAME
;
break_cmd
: D_BREAK
| D_TBREAK
;
/* mid-rule action buried in non-terminal to avoid conflict */
set_want_nodeval
: { want_nodeval = true; }
;
eval_prologue
: D_EVAL set_want_nodeval opt_param_list nls
{
if (errcount == 0) {
/* don't free arg_list; passed on to statement_list
* non-terminal (empty rule action). See below.
*/
if (input_from_tty) {
dbg_prompt = eval_prompt;
fprintf(out_fp,
_("Type (g)awk statement(s). End with the command \"end\"\n"));
rl_inhibit_completion = 1;
}
cmd_idx = -1;
in_eval = true;
}
}
;
statement_list
: /* empty */
{
$$ = append_statement(arg_list, (char *) start_EVAL);
if (read_a_line == read_commands_string) /* unserializing 'eval' in 'commands' */
$$->a_string[0] = '\0';
free_cmdarg(arg_list);
arg_list = NULL;
}
| statement_list D_STATEMENT { $$ = append_statement($1, lexptr_begin); } nls
{
$$ = $3;
}
;
eval_cmd
: eval_prologue statement_list D_END
{
arg_list = append_statement($2, (char *) end_EVAL);
if (read_a_line == read_commands_string) { /* unserializing 'eval' in 'commands' */
char *str = arg_list->a_string;
size_t len = strlen(str);
assert(len > 2 && str[len - 2] == '}');
str[len - 2] = '\0';
}
if (input_from_tty) {
dbg_prompt = in_commands ? commands_prompt : dgawk_prompt;
rl_inhibit_completion = 0;
}
cmd_idx = find_command("eval", 4);
in_eval = false;
}
| D_EVAL set_want_nodeval string_node
{
NODE *n;
CMDARG *arg;
n = $3->a_node;
arg = append_statement(NULL, (char *) start_EVAL);
(void) append_statement(arg, n->stptr);
(void) append_statement(arg, (char *) end_EVAL);
free_cmdarg(arg_list);
arg_list = arg;
}
;
command
: D_HELP help_args
| D_QUIT
| D_RUN
| D_FINISH
| control_cmd opt_plus_integer
| frame_cmd opt_integer
{
if (cmdtab[cmd_idx].class == D_FRAME
&& $2 != NULL && $2->a_int < 0)
yyerror(_("invalid frame number: %d"), $2->a_int);
}
| D_INFO D_STRING
{
int idx = find_argument($2);
if (idx < 0)
yyerror(_("info: invalid option - \"%s\""), $2->a_string);
else {
efree($2->a_string);
$2->a_string = NULL;
$2->type = D_argument;
$2->a_argument = argtab[idx].value;
}
}
| D_IGNORE plus_integer D_INT
| D_ENABLE enable_args
| D_PRINT { want_nodeval = true; } print_args
| D_PRINTF { want_nodeval = true; } printf_args
| D_LIST list_args
| D_UNTIL location
| D_CLEAR location
| break_cmd break_args
| D_SET { want_nodeval = true; } variable '=' node
| D_OPTION option_args
| D_RETURN { want_nodeval = true; } opt_node
| D_DISPLAY { want_nodeval = true; } opt_variable
| D_WATCH { want_nodeval = true; } variable condition_exp
| d_cmd opt_integer_list
| D_DUMP opt_string
| D_SOURCE D_STRING
{
if (in_cmd_src($2->a_string))
yyerror(_("source \"%s\": already sourced."), $2->a_string);
}
| D_SAVE D_STRING
{
if (! input_from_tty)
yyerror(_("save \"%s\": command not permitted."), $2->a_string);
}
| D_COMMANDS commands_arg
{
int type = 0;
int num;
if ($2 != NULL)
num = $2->a_int;
if (errcount != 0)
;
else if (in_commands)
yyerror(_("Can't use command `commands' for breakpoint/watchpoint commands"));
else if ($2 == NULL && ! (type = has_break_or_watch_point(&num, true)))
yyerror(_("no breakpoint/watchpoint has been set yet"));
else if ($2 != NULL && ! (type = has_break_or_watch_point(&num, false)))
yyerror(_("invalid breakpoint/watchpoint number"));
if (type) {
in_commands = true;
if (input_from_tty) {
dbg_prompt = commands_prompt;
fprintf(out_fp, _("Type commands for when %s %d is hit, one per line.\n"),
(type == D_break) ? "breakpoint" : "watchpoint", num);
fprintf(out_fp, _("End with the command \"end\"\n"));
}
}
}
| D_END
{
if (! in_commands)
yyerror(_("`end' valid only in command `commands' or `eval'"));
else {
if (input_from_tty)
dbg_prompt = dgawk_prompt;
in_commands = false;
}
}
| D_SILENT
{
if (! in_commands)
yyerror(_("`silent' valid only in command `commands'"));
}
| D_TRACE D_STRING
{
int idx = find_argument($2);
if (idx < 0)
yyerror(_("trace: invalid option - \"%s\""), $2->a_string);
else {
efree($2->a_string);
$2->a_string = NULL;
$2->type = D_argument;
$2->a_argument = argtab[idx].value;
}
}
| D_CONDITION plus_integer { want_nodeval = true; } condition_exp
{
int type;
int num = $2->a_int;
type = has_break_or_watch_point(&num, false);
if (! type)
yyerror(_("condition: invalid breakpoint/watchpoint number"));
}
| eval_cmd
{
if (in_commands) {
/* Prepend command 'eval' to argument list */
CMDARG *arg;
arg = mk_cmdarg(D_string);
arg->a_string = estrdup("eval", 4);
arg->next = arg_list;
arg_list = arg;
}
}
;
condition_exp
: opt_string_node
{
if ($1 != NULL) {
NODE *n = $1->a_node;
$1->type = D_string;
$1->a_string = n->stptr;
freenode(n);
}
$$ = $1;
}
;
commands_arg
: opt_plus_integer
| error
{ $$ = NULL; }
;
opt_param_list
: /* empty */
{ $$ = NULL; }
| param_list
;
param_list
: D_VARIABLE
| param_list D_VARIABLE
| param_list ',' D_VARIABLE
| error
{ $$ = NULL; }
;
opt_string_node
: /* empty */
{ $$ = NULL; }
| string_node
| error
{ $$ = NULL; }
;
string_node
: D_NODE
{
NODE *n;
n = $1->a_node;
if ((n->flags & STRING) == 0)
yyerror(_("argument not a string"));
}
;
option_args
: /* empty */
{ $$ = NULL; }
| D_STRING
{
if (find_option($1->a_string) < 0)
yyerror(_("option: invalid parameter - \"%s\""), $1->a_string);
}
| D_STRING '=' D_STRING
{
if (find_option($1->a_string) < 0)
yyerror(_("option: invalid parameter - \"%s\""), $1->a_string);
}
;
func_name
: D_STRING
{
NODE *n;
n = lookup($1->a_string);
if (n == NULL || n->type != Node_func)
yyerror(_("no such function - \"%s\""), $1->a_string);
else {
$1->type = D_func;
efree($1->a_string);
$1->a_string = NULL;
$1->a_node = n;
}
}
;
location
: /* empty */
{ $$ = NULL; }
| plus_integer
| func_name
| D_STRING ':' plus_integer
| D_STRING ':' func_name
;
break_args
: /* empty */
{ $$ = NULL; }
| plus_integer { want_nodeval = true; } condition_exp
| func_name
| D_STRING ':' plus_integer { want_nodeval = true; } condition_exp
| D_STRING ':' func_name
;
opt_variable
: /* empty */
{ $$ = NULL; }
| variable
;
opt_string
: /* empty */
{ $$ = NULL; }
| D_STRING
;
opt_node
: /* empty */
{ $$ = NULL; }
| node
;
help_args
: /* empty */
| D_STRING
;
enable_args
: opt_integer_list
| D_STRING opt_integer_list
{
int idx = find_argument($1);
if (idx < 0)
yyerror(_("enable: invalid option - \"%s\""), $1->a_string);
else {
efree($1->a_string);
$1->a_string = NULL;
$1->type = D_argument;
$1->a_argument = argtab[idx].value;
}
}
;
print_exp
: variable
| '@' D_VARIABLE
{
$2->type = D_array; /* dump all items */
$2->a_count = 0;
}
| '@' D_VARIABLE subscript_list /* dump sub-array items*/
{
$2->type = D_array;
$2->a_count = num_dim;
}
;
print_args
: print_exp
| print_args print_exp
| print_args ',' print_exp
| error
;
printf_exp
: D_NODE
| variable
;
printf_args
: printf_exp
| printf_args ',' printf_exp
| error
;
list_args
: /* empty */
{ $$ = NULL; }
| '+'
{ $$ = NULL; }
| '-'
{
CMDARG *a;
a = mk_cmdarg(D_int);
a->a_int = -1;
append_cmdarg(a);
}
| plus_integer
| func_name
| integer_range
| D_STRING ':' plus_integer
| D_STRING ':' func_name
| D_STRING ':' integer_range
;
integer_range
: plus_integer '-' plus_integer
{
if ($1->a_int > $3->a_int)
yyerror(_("invalid range specification: %d - %d"),
$1->a_int, $3->a_int);
else
$1->type = D_range;
$$ = $1;
}
;
opt_integer_list
: /* empty */
{ $$ = NULL; }
| integer_list
| error
;
integer_list
: plus_integer
| integer_range
| integer_list plus_integer
| integer_list integer_range
;
exp_list
: node
{ $$ = $1; }
| exp_list ',' node
{ $$ = $1; }
| error
;
subscript
: '[' exp_list ']'
{
CMDARG *a;
NODE *subs;
int count = 0;
for (a = $2; a != NULL; a = a->next)
count++;
subs = concat_args($2, count);
free_cmdarg($2->next);
$2->next = NULL;
$2->type = D_node;
$2->a_node = subs;
$$ = $2;
}
| '[' exp_list error
;
subscript_list
: subscript
{ $$ = $1; num_dim = 1; }
| subscript_list subscript
{ $$ = $1; num_dim++; }
;
variable
: D_VARIABLE
| '$' D_NODE
{
NODE *n = $2->a_node;
if ((n->flags & NUMBER) == 0)
yyerror(_("non-numeric value for field number"));
else
$2->type = D_field;
$$ = $2;
}
| D_VARIABLE subscript_list
{
/* a_string is array name, a_count is dimension count */
$1->type = D_subscript;
$1->a_count = num_dim;
$$ = $1;
}
;
node
: D_NODE
{ $$ = $1; }
| '+' D_NODE
{
NODE *n = $2->a_node;
if ((n->flags & NUMBER) == 0)
yyerror(_("non-numeric value found, numeric expected"));
$$ = $2;
}
| '-' D_NODE
{
NODE *n = $2->a_node;
if ((n->flags & NUMBER) == 0)
yyerror(_("non-numeric value found, numeric expected"));
else
negate_num(n);
$$ = $2;
}
;
opt_plus_integer
: /* empty */
{ $$ = NULL; }
| plus_integer
{ $$ = $1; }
;
opt_integer
: /* empty */
{ $$ = NULL; }
| integer
{ $$ = $1; }
;
plus_integer
: D_INT
{
if ($1->a_int == 0)
yyerror(_("non-zero integer value"));
$$ = $1;
}
| '+' D_INT
{
if ($2->a_int == 0)
yyerror(_("non-zero integer value"));
$$ = $2;
}
;
integer
: D_INT
{ $$ = $1; }
| '+' D_INT
{ $$ = $2; }
| '-' D_INT
{
$2->a_int = - $2->a_int;
$$ = $2;
}
;
nls
: '\n'
{
if (lexptr_begin != NULL) {
if (input_from_tty && lexptr_begin[0] != '\0')
add_history(lexptr_begin);
efree(lexptr_begin);
lexptr_begin = NULL;
}
}
;
%%
/* append_statement --- append 'stmt' to the list of eval awk statements */
static CMDARG *
append_statement(CMDARG *stmt_list, char *stmt)
{
CMDARG *a, *arg;
char *s;
int len, slen, ssize;
#define EVALSIZE 512
if (stmt == start_EVAL) {
len = sizeof(start_EVAL);
for (a = stmt_list; a != NULL; a = a->next)
len += strlen(a->a_string) + 1; /* 1 for ',' */
len += EVALSIZE;
emalloc(s, char *, (len + 2) * sizeof(char), "append_statement");
arg = mk_cmdarg(D_string);
arg->a_string = s;
arg->a_count = len; /* kludge */
slen = sizeof("function @eval(") - 1;
memcpy(s, start_EVAL, slen);
for (a = stmt_list; a != NULL; a = a->next) {
len = strlen(a->a_string);
memcpy(s + slen, a->a_string, len);
slen += len;
if (a->next != NULL)
s[slen++] = ',';
}
s[slen++] = ')';
s[slen++] = '{';
s[slen] = '\0';
return arg;
}
len = strlen(stmt) + 1; /* 1 for newline */
s = stmt_list->a_string;
slen = strlen(s);
ssize = stmt_list->a_count;
if (len > ssize - slen) {
ssize = slen + len + EVALSIZE;
erealloc(s, char *, (ssize + 2) * sizeof(char), "append_statement");
stmt_list->a_string = s;
stmt_list->a_count = ssize;
}
memcpy(s + slen, stmt, len);
slen += len;
if (slen >= 2 && s[slen - 2] != '\n') {
s[slen - 1] = '\n';
s[slen] = '\0';
}
if (stmt == end_EVAL)
erealloc(stmt_list->a_string, char *, slen + 2, "append_statement");
return stmt_list;
#undef EVALSIZE
}
/* command names sorted in ascending order */
struct cmdtoken cmdtab[] = {
{ "backtrace", "bt", D_backtrace, D_BACKTRACE, do_backtrace,
gettext_noop("backtrace [N] - print trace of all or N innermost (outermost if N < 0) frames.") },
{ "break", "b", D_break, D_BREAK, do_breakpoint,
gettext_noop("break [[filename:]N|function] - set breakpoint at the specified location.") },
{ "clear", "", D_clear, D_CLEAR, do_clear,
gettext_noop("clear [[filename:]N|function] - delete breakpoints previously set.") },
{ "commands", "", D_commands, D_COMMANDS, do_commands,
gettext_noop("commands [num] - starts a list of commands to be executed at a breakpoint(watchpoint) hit.") },
{ "condition", "", D_condition, D_CONDITION, do_condition,
gettext_noop("condition num [expr] - set or clear breakpoint or watchpoint condition.") },
{ "continue", "c", D_continue, D_CONTINUE, do_continue,
gettext_noop("continue [COUNT] - continue program being debugged.") },
{ "delete", "d", D_delete, D_DELETE, do_delete_breakpoint,
gettext_noop("delete [breakpoints] [range] - delete specified breakpoints.") },
{ "disable", "", D_disable, D_DISABLE, do_disable_breakpoint,
gettext_noop("disable [breakpoints] [range] - disable specified breakpoints.") },
{ "display", "", D_display, D_DISPLAY, do_display,
gettext_noop("display [var] - print value of variable each time the program stops.") },
{ "down", "", D_down, D_DOWN, do_down,
gettext_noop("down [N] - move N frames down the stack.") },
{ "dump", "", D_dump, D_DUMP, do_dump_instructions,
gettext_noop("dump [filename] - dump instructions to file or stdout.") },
{ "enable", "e", D_enable, D_ENABLE, do_enable_breakpoint,
gettext_noop("enable [once|del] [breakpoints] [range] - enable specified breakpoints.") },
{ "end", "", D_end, D_END, do_commands,
gettext_noop("end - end a list of commands or awk statements.") },
{ "eval", "", D_eval, D_EVAL, do_eval,
gettext_noop("eval stmt|[p1, p2, ...] - evaluate awk statement(s).") },
{ "finish", "", D_finish, D_FINISH, do_finish,
gettext_noop("finish - execute until selected stack frame returns.") },
{ "frame", "f", D_frame, D_FRAME, do_frame,
gettext_noop("frame [N] - select and print stack frame number N.") },
{ "help", "h", D_help, D_HELP, do_help,
gettext_noop("help [command] - print list of commands or explanation of command.") },
{ "ignore", "", D_ignore, D_IGNORE, do_ignore_breakpoint,
gettext_noop("ignore N COUNT - set ignore-count of breakpoint number N to COUNT.") },
{ "info", "i", D_info, D_INFO, do_info,
gettext_noop("info topic - source|sources|variables|functions|break|frame|args|locals|display|watch.") },
{ "list", "l", D_list, D_LIST, do_list,
gettext_noop("list [-|+|[filename:]lineno|function|range] - list specified line(s).") },
{ "next", "n", D_next, D_NEXT, do_next,
gettext_noop("next [COUNT] - step program, proceeding through subroutine calls.") },
{ "nexti", "ni", D_nexti, D_NEXTI, do_nexti,
gettext_noop("nexti [COUNT] - step one instruction, but proceed through subroutine calls.") },
{ "option", "o", D_option, D_OPTION, do_option,
gettext_noop("option [name[=value]] - set or display debugger option(s).") },
{ "print", "p", D_print, D_PRINT, do_print_var,
gettext_noop("print var [var] - print value of a variable or array.") },
{ "printf", "", D_printf, D_PRINTF, do_print_f,
gettext_noop("printf format, [arg], ... - formatted output.") },
{ "quit", "q", D_quit, D_QUIT, do_quit,
gettext_noop("quit - exit debugger.") },
{ "return", "", D_return, D_RETURN, do_return,
gettext_noop("return [value] - make selected stack frame return to its caller.") },
{ "run", "r", D_run, D_RUN, do_run,
gettext_noop("run - start or restart executing program.") },
#ifdef HAVE_LIBREADLINE
{ "save", "", D_save, D_SAVE, do_save,
gettext_noop("save filename - save commands from the session to file.") },
#endif
{ "set", "", D_set, D_SET, do_set_var,
gettext_noop("set var = value - assign value to a scalar variable.") },
{ "silent", "", D_silent, D_SILENT, do_commands,
gettext_noop("silent - suspends usual message when stopped at a breakpoint/watchpoint.") },
{ "source", "", D_source, D_SOURCE, do_source,
gettext_noop("source file - execute commands from file.") },
{ "step", "s", D_step, D_STEP, do_step,
gettext_noop("step [COUNT] - step program until it reaches a different source line.") },
{ "stepi", "si", D_stepi, D_STEPI, do_stepi,
gettext_noop("stepi [COUNT] - step one instruction exactly.") },
{ "tbreak", "t", D_tbreak, D_TBREAK, do_tmp_breakpoint,
gettext_noop("tbreak [[filename:]N|function] - set a temporary breakpoint.") },
{ "trace", "", D_trace, D_TRACE, do_trace_instruction,
gettext_noop("trace on|off - print instruction before executing.") },
{ "undisplay", "", D_undisplay, D_UNDISPLAY, do_undisplay,
gettext_noop("undisplay [N] - remove variable(s) from automatic display list.") },
{ "until", "u", D_until, D_UNTIL, do_until,
gettext_noop("until [[filename:]N|function] - execute until program reaches a different line or line N within current frame.") },
{ "unwatch", "", D_unwatch, D_UNWATCH, do_unwatch,
gettext_noop("unwatch [N] - remove variable(s) from watch list.") },
{ "up", "", D_up, D_UP, do_up,
gettext_noop("up [N] - move N frames up the stack.") },
{ "watch", "w", D_watch, D_WATCH, do_watch,
gettext_noop("watch var - set a watchpoint for a variable.") },
{ NULL, NULL, D_illegal, 0, (Func_cmd) 0,
NULL },
};
struct argtoken argtab[] = {
{ "args", D_info, A_ARGS },
{ "break", D_info, A_BREAK },
{ "del", D_enable, A_DEL },
{ "display", D_info, A_DISPLAY },
{ "frame", D_info, A_FRAME },
{ "functions", D_info, A_FUNCTIONS },
{ "locals", D_info, A_LOCALS },
{ "off", D_trace, A_TRACE_OFF },
{ "on", D_trace, A_TRACE_ON },
{ "once", D_enable, A_ONCE },
{ "source", D_info, A_SOURCE },
{ "sources", D_info, A_SOURCES },
{ "variables", D_info, A_VARIABLES },
{ "watch", D_info, A_WATCH },
{ NULL, D_illegal, 0 },
};
/* get_command --- return command handler function */
Func_cmd
get_command(int ctype)
{
int i;
for (i = 0; cmdtab[i].name != NULL; i++) {
if (cmdtab[i].type == ctype)
return cmdtab[i].cf_ptr;
}
return (Func_cmd) 0;
}
/* get_command_name --- return command name given it's type */
const char *
get_command_name(int ctype)
{
int i;
for (i = 0; cmdtab[i].name != NULL; i++) {
if (cmdtab[i].type == ctype)
return cmdtab[i].name;
}
return NULL;
}
/* mk_cmdarg --- make an argument for command */
static CMDARG *
mk_cmdarg(enum argtype type)
{
CMDARG *arg;
emalloc(arg, CMDARG *, sizeof(CMDARG), "mk_cmdarg");
memset(arg, 0, sizeof(CMDARG));
arg->type = type;
return arg;
}
/* append_cmdarg --- append ARG to the list of arguments for the current command */
static void
append_cmdarg(CMDARG *arg)
{
static CMDARG *savetail;
if (arg_list == NULL)
arg_list = arg;
else
savetail->next = arg;
savetail = arg;
}
/* free_cmdarg --- free all arguments in LIST */
void
free_cmdarg(CMDARG *list)
{
CMDARG *arg, *nexta;
for (arg = list; arg != NULL; arg = nexta) {
nexta = arg->next;
switch (arg->type) {
case D_variable:
case D_subscript:
case D_array:
case D_string:
if (arg->a_string != NULL)
efree(arg->a_string);
break;
case D_node:
case D_field:
unref(arg->a_node);
break;
default:
break;
}
efree(arg);