* dummy-frame.c (deprecated_pc_in_call_dummy): Add GDBARCH parameter,
[deliverable/binutils-gdb.git] / gdb / printcmd.c
1 /* Print values for GNU debugger GDB.
2
3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
5 2008, 2009 Free Software Foundation, Inc.
6
7 This file is part of GDB.
8
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 3 of the License, or
12 (at your option) any later version.
13
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
18
19 You should have received a copy of the GNU General Public License
20 along with this program. If not, see <http://www.gnu.org/licenses/>. */
21
22 #include "defs.h"
23 #include "gdb_string.h"
24 #include "frame.h"
25 #include "symtab.h"
26 #include "gdbtypes.h"
27 #include "value.h"
28 #include "language.h"
29 #include "expression.h"
30 #include "gdbcore.h"
31 #include "gdbcmd.h"
32 #include "target.h"
33 #include "breakpoint.h"
34 #include "demangle.h"
35 #include "valprint.h"
36 #include "annotate.h"
37 #include "symfile.h" /* for overlay functions */
38 #include "objfiles.h" /* ditto */
39 #include "completer.h" /* for completion functions */
40 #include "ui-out.h"
41 #include "gdb_assert.h"
42 #include "block.h"
43 #include "disasm.h"
44 #include "dfp.h"
45 #include "valprint.h"
46 #include "exceptions.h"
47 #include "observer.h"
48 #include "solist.h"
49 #include "solib.h"
50 #include "parser-defs.h"
51 #include "charset.h"
52
53 #ifdef TUI
54 #include "tui/tui.h" /* For tui_active et.al. */
55 #endif
56
57 #if defined(__MINGW32__) && !defined(PRINTF_HAS_LONG_LONG)
58 # define USE_PRINTF_I64 1
59 # define PRINTF_HAS_LONG_LONG
60 #else
61 # define USE_PRINTF_I64 0
62 #endif
63
64 extern int asm_demangle; /* Whether to demangle syms in asm printouts */
65
66 struct format_data
67 {
68 int count;
69 char format;
70 char size;
71
72 /* True if the value should be printed raw -- that is, bypassing
73 python-based formatters. */
74 unsigned char raw;
75 };
76
77 /* Last specified output format. */
78
79 static char last_format = 0;
80
81 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
82
83 static char last_size = 'w';
84
85 /* Default address to examine next. */
86
87 static CORE_ADDR next_address;
88
89 /* Number of delay instructions following current disassembled insn. */
90
91 static int branch_delay_insns;
92
93 /* Last address examined. */
94
95 static CORE_ADDR last_examine_address;
96
97 /* Contents of last address examined.
98 This is not valid past the end of the `x' command! */
99
100 static struct value *last_examine_value;
101
102 /* Largest offset between a symbolic value and an address, that will be
103 printed as `0x1234 <symbol+offset>'. */
104
105 static unsigned int max_symbolic_offset = UINT_MAX;
106 static void
107 show_max_symbolic_offset (struct ui_file *file, int from_tty,
108 struct cmd_list_element *c, const char *value)
109 {
110 fprintf_filtered (file, _("\
111 The largest offset that will be printed in <symbol+1234> form is %s.\n"),
112 value);
113 }
114
115 /* Append the source filename and linenumber of the symbol when
116 printing a symbolic value as `<symbol at filename:linenum>' if set. */
117 static int print_symbol_filename = 0;
118 static void
119 show_print_symbol_filename (struct ui_file *file, int from_tty,
120 struct cmd_list_element *c, const char *value)
121 {
122 fprintf_filtered (file, _("\
123 Printing of source filename and line number with <symbol> is %s.\n"),
124 value);
125 }
126
127 /* Number of auto-display expression currently being displayed.
128 So that we can disable it if we get an error or a signal within it.
129 -1 when not doing one. */
130
131 int current_display_number;
132
133 struct display
134 {
135 /* Chain link to next auto-display item. */
136 struct display *next;
137 /* The expression as the user typed it. */
138 char *exp_string;
139 /* Expression to be evaluated and displayed. */
140 struct expression *exp;
141 /* Item number of this auto-display item. */
142 int number;
143 /* Display format specified. */
144 struct format_data format;
145 /* Innermost block required by this expression when evaluated */
146 struct block *block;
147 /* Status of this display (enabled or disabled) */
148 int enabled_p;
149 };
150
151 /* Chain of expressions whose values should be displayed
152 automatically each time the program stops. */
153
154 static struct display *display_chain;
155
156 static int display_number;
157
158 /* Prototypes for exported functions. */
159
160 void output_command (char *, int);
161
162 void _initialize_printcmd (void);
163
164 /* Prototypes for local functions. */
165
166 static void do_one_display (struct display *);
167 \f
168
169 /* Decode a format specification. *STRING_PTR should point to it.
170 OFORMAT and OSIZE are used as defaults for the format and size
171 if none are given in the format specification.
172 If OSIZE is zero, then the size field of the returned value
173 should be set only if a size is explicitly specified by the
174 user.
175 The structure returned describes all the data
176 found in the specification. In addition, *STRING_PTR is advanced
177 past the specification and past all whitespace following it. */
178
179 static struct format_data
180 decode_format (char **string_ptr, int oformat, int osize)
181 {
182 struct format_data val;
183 char *p = *string_ptr;
184
185 val.format = '?';
186 val.size = '?';
187 val.count = 1;
188 val.raw = 0;
189
190 if (*p >= '0' && *p <= '9')
191 val.count = atoi (p);
192 while (*p >= '0' && *p <= '9')
193 p++;
194
195 /* Now process size or format letters that follow. */
196
197 while (1)
198 {
199 if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g')
200 val.size = *p++;
201 else if (*p == 'r')
202 {
203 val.raw = 1;
204 p++;
205 }
206 else if (*p >= 'a' && *p <= 'z')
207 val.format = *p++;
208 else
209 break;
210 }
211
212 while (*p == ' ' || *p == '\t')
213 p++;
214 *string_ptr = p;
215
216 /* Set defaults for format and size if not specified. */
217 if (val.format == '?')
218 {
219 if (val.size == '?')
220 {
221 /* Neither has been specified. */
222 val.format = oformat;
223 val.size = osize;
224 }
225 else
226 /* If a size is specified, any format makes a reasonable
227 default except 'i'. */
228 val.format = oformat == 'i' ? 'x' : oformat;
229 }
230 else if (val.size == '?')
231 switch (val.format)
232 {
233 case 'a':
234 case 's':
235 /* Pick the appropriate size for an address. */
236 if (gdbarch_ptr_bit (current_gdbarch) == 64)
237 val.size = osize ? 'g' : osize;
238 else if (gdbarch_ptr_bit (current_gdbarch) == 32)
239 val.size = osize ? 'w' : osize;
240 else if (gdbarch_ptr_bit (current_gdbarch) == 16)
241 val.size = osize ? 'h' : osize;
242 else
243 /* Bad value for gdbarch_ptr_bit. */
244 internal_error (__FILE__, __LINE__,
245 _("failed internal consistency check"));
246 break;
247 case 'f':
248 /* Floating point has to be word or giantword. */
249 if (osize == 'w' || osize == 'g')
250 val.size = osize;
251 else
252 /* Default it to giantword if the last used size is not
253 appropriate. */
254 val.size = osize ? 'g' : osize;
255 break;
256 case 'c':
257 /* Characters default to one byte. */
258 val.size = osize ? 'b' : osize;
259 break;
260 default:
261 /* The default is the size most recently specified. */
262 val.size = osize;
263 }
264
265 return val;
266 }
267 \f
268 /* Print value VAL on stream according to OPTIONS.
269 Do not end with a newline.
270 SIZE is the letter for the size of datum being printed.
271 This is used to pad hex numbers so they line up. SIZE is 0
272 for print / output and set for examine. */
273
274 static void
275 print_formatted (struct value *val, int size,
276 const struct value_print_options *options,
277 struct ui_file *stream)
278 {
279 struct type *type = check_typedef (value_type (val));
280 int len = TYPE_LENGTH (type);
281
282 if (VALUE_LVAL (val) == lval_memory)
283 next_address = value_address (val) + len;
284
285 if (size)
286 {
287 switch (options->format)
288 {
289 case 's':
290 {
291 struct type *elttype = value_type (val);
292 next_address = (value_address (val)
293 + val_print_string (elttype,
294 value_address (val), -1,
295 stream, options));
296 }
297 return;
298
299 case 'i':
300 /* We often wrap here if there are long symbolic names. */
301 wrap_here (" ");
302 next_address = (value_address (val)
303 + gdb_print_insn (value_address (val), stream,
304 &branch_delay_insns));
305 return;
306 }
307 }
308
309 if (options->format == 0 || options->format == 's'
310 || TYPE_CODE (type) == TYPE_CODE_REF
311 || TYPE_CODE (type) == TYPE_CODE_ARRAY
312 || TYPE_CODE (type) == TYPE_CODE_STRING
313 || TYPE_CODE (type) == TYPE_CODE_STRUCT
314 || TYPE_CODE (type) == TYPE_CODE_UNION
315 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
316 value_print (val, stream, options);
317 else
318 /* User specified format, so don't look to the the type to
319 tell us what to do. */
320 print_scalar_formatted (value_contents (val), type,
321 options, size, stream);
322 }
323
324 /* Return builtin floating point type of same length as TYPE.
325 If no such type is found, return TYPE itself. */
326 static struct type *
327 float_type_from_length (struct gdbarch *gdbarch, struct type *type)
328 {
329 const struct builtin_type *builtin = builtin_type (gdbarch);
330 unsigned int len = TYPE_LENGTH (type);
331
332 if (len == TYPE_LENGTH (builtin->builtin_float))
333 type = builtin->builtin_float;
334 else if (len == TYPE_LENGTH (builtin->builtin_double))
335 type = builtin->builtin_double;
336 else if (len == TYPE_LENGTH (builtin->builtin_long_double))
337 type = builtin->builtin_long_double;
338
339 return type;
340 }
341
342 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
343 according to OPTIONS and SIZE on STREAM.
344 Formats s and i are not supported at this level.
345
346 This is how the elements of an array or structure are printed
347 with a format. */
348
349 void
350 print_scalar_formatted (const void *valaddr, struct type *type,
351 const struct value_print_options *options,
352 int size, struct ui_file *stream)
353 {
354 LONGEST val_long = 0;
355 unsigned int len = TYPE_LENGTH (type);
356 enum bfd_endian byte_order = gdbarch_byte_order (current_gdbarch);
357
358 /* If we get here with a string format, try again without it. Go
359 all the way back to the language printers, which may call us
360 again. */
361 if (options->format == 's')
362 {
363 struct value_print_options opts = *options;
364 opts.format = 0;
365 opts.deref_ref = 0;
366 val_print (type, valaddr, 0, 0, stream, 0, &opts,
367 current_language);
368 return;
369 }
370
371 if (len > sizeof(LONGEST) &&
372 (TYPE_CODE (type) == TYPE_CODE_INT
373 || TYPE_CODE (type) == TYPE_CODE_ENUM))
374 {
375 switch (options->format)
376 {
377 case 'o':
378 print_octal_chars (stream, valaddr, len, byte_order);
379 return;
380 case 'u':
381 case 'd':
382 print_decimal_chars (stream, valaddr, len, byte_order);
383 return;
384 case 't':
385 print_binary_chars (stream, valaddr, len, byte_order);
386 return;
387 case 'x':
388 print_hex_chars (stream, valaddr, len, byte_order);
389 return;
390 case 'c':
391 print_char_chars (stream, type, valaddr, len, byte_order);
392 return;
393 default:
394 break;
395 };
396 }
397
398 if (options->format != 'f')
399 val_long = unpack_long (type, valaddr);
400
401 /* If the value is a pointer, and pointers and addresses are not the
402 same, then at this point, the value's length (in target bytes) is
403 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
404 if (TYPE_CODE (type) == TYPE_CODE_PTR)
405 len = gdbarch_addr_bit (current_gdbarch) / TARGET_CHAR_BIT;
406
407 /* If we are printing it as unsigned, truncate it in case it is actually
408 a negative signed value (e.g. "print/u (short)-1" should print 65535
409 (if shorts are 16 bits) instead of 4294967295). */
410 if (options->format != 'd')
411 {
412 if (len < sizeof (LONGEST))
413 val_long &= ((LONGEST) 1 << HOST_CHAR_BIT * len) - 1;
414 }
415
416 switch (options->format)
417 {
418 case 'x':
419 if (!size)
420 {
421 /* No size specified, like in print. Print varying # of digits. */
422 print_longest (stream, 'x', 1, val_long);
423 }
424 else
425 switch (size)
426 {
427 case 'b':
428 case 'h':
429 case 'w':
430 case 'g':
431 print_longest (stream, size, 1, val_long);
432 break;
433 default:
434 error (_("Undefined output size \"%c\"."), size);
435 }
436 break;
437
438 case 'd':
439 print_longest (stream, 'd', 1, val_long);
440 break;
441
442 case 'u':
443 print_longest (stream, 'u', 0, val_long);
444 break;
445
446 case 'o':
447 if (val_long)
448 print_longest (stream, 'o', 1, val_long);
449 else
450 fprintf_filtered (stream, "0");
451 break;
452
453 case 'a':
454 {
455 CORE_ADDR addr = unpack_pointer (type, valaddr);
456 print_address (addr, stream);
457 }
458 break;
459
460 case 'c':
461 {
462 struct value_print_options opts = *options;
463 opts.format = 0;
464 if (TYPE_UNSIGNED (type))
465 value_print (value_from_longest (builtin_type_true_unsigned_char,
466 val_long),
467 stream, &opts);
468 else
469 value_print (value_from_longest (builtin_type_true_char, val_long),
470 stream, &opts);
471 }
472 break;
473
474 case 'f':
475 type = float_type_from_length (current_gdbarch, type);
476 print_floating (valaddr, type, stream);
477 break;
478
479 case 0:
480 internal_error (__FILE__, __LINE__,
481 _("failed internal consistency check"));
482
483 case 't':
484 /* Binary; 't' stands for "two". */
485 {
486 char bits[8 * (sizeof val_long) + 1];
487 char buf[8 * (sizeof val_long) + 32];
488 char *cp = bits;
489 int width;
490
491 if (!size)
492 width = 8 * (sizeof val_long);
493 else
494 switch (size)
495 {
496 case 'b':
497 width = 8;
498 break;
499 case 'h':
500 width = 16;
501 break;
502 case 'w':
503 width = 32;
504 break;
505 case 'g':
506 width = 64;
507 break;
508 default:
509 error (_("Undefined output size \"%c\"."), size);
510 }
511
512 bits[width] = '\0';
513 while (width-- > 0)
514 {
515 bits[width] = (val_long & 1) ? '1' : '0';
516 val_long >>= 1;
517 }
518 if (!size)
519 {
520 while (*cp && *cp == '0')
521 cp++;
522 if (*cp == '\0')
523 cp--;
524 }
525 strcpy (buf, cp);
526 fputs_filtered (buf, stream);
527 }
528 break;
529
530 default:
531 error (_("Undefined output format \"%c\"."), options->format);
532 }
533 }
534
535 /* Specify default address for `x' command.
536 The `info lines' command uses this. */
537
538 void
539 set_next_address (struct gdbarch *gdbarch, CORE_ADDR addr)
540 {
541 struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
542
543 next_address = addr;
544
545 /* Make address available to the user as $_. */
546 set_internalvar (lookup_internalvar ("_"),
547 value_from_pointer (ptr_type, addr));
548 }
549
550 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
551 after LEADIN. Print nothing if no symbolic name is found nearby.
552 Optionally also print source file and line number, if available.
553 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
554 or to interpret it as a possible C++ name and convert it back to source
555 form. However note that DO_DEMANGLE can be overridden by the specific
556 settings of the demangle and asm_demangle variables. */
557
558 void
559 print_address_symbolic (CORE_ADDR addr, struct ui_file *stream,
560 int do_demangle, char *leadin)
561 {
562 char *name = NULL;
563 char *filename = NULL;
564 int unmapped = 0;
565 int offset = 0;
566 int line = 0;
567
568 /* Throw away both name and filename. */
569 struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &name);
570 make_cleanup (free_current_contents, &filename);
571
572 if (build_address_symbolic (addr, do_demangle, &name, &offset,
573 &filename, &line, &unmapped))
574 {
575 do_cleanups (cleanup_chain);
576 return;
577 }
578
579 fputs_filtered (leadin, stream);
580 if (unmapped)
581 fputs_filtered ("<*", stream);
582 else
583 fputs_filtered ("<", stream);
584 fputs_filtered (name, stream);
585 if (offset != 0)
586 fprintf_filtered (stream, "+%u", (unsigned int) offset);
587
588 /* Append source filename and line number if desired. Give specific
589 line # of this addr, if we have it; else line # of the nearest symbol. */
590 if (print_symbol_filename && filename != NULL)
591 {
592 if (line != -1)
593 fprintf_filtered (stream, " at %s:%d", filename, line);
594 else
595 fprintf_filtered (stream, " in %s", filename);
596 }
597 if (unmapped)
598 fputs_filtered ("*>", stream);
599 else
600 fputs_filtered (">", stream);
601
602 do_cleanups (cleanup_chain);
603 }
604
605 /* Given an address ADDR return all the elements needed to print the
606 address in a symbolic form. NAME can be mangled or not depending
607 on DO_DEMANGLE (and also on the asm_demangle global variable,
608 manipulated via ''set print asm-demangle''). Return 0 in case of
609 success, when all the info in the OUT paramters is valid. Return 1
610 otherwise. */
611 int
612 build_address_symbolic (CORE_ADDR addr, /* IN */
613 int do_demangle, /* IN */
614 char **name, /* OUT */
615 int *offset, /* OUT */
616 char **filename, /* OUT */
617 int *line, /* OUT */
618 int *unmapped) /* OUT */
619 {
620 struct minimal_symbol *msymbol;
621 struct symbol *symbol;
622 CORE_ADDR name_location = 0;
623 struct obj_section *section = NULL;
624 char *name_temp = "";
625
626 /* Let's say it is mapped (not unmapped). */
627 *unmapped = 0;
628
629 /* Determine if the address is in an overlay, and whether it is
630 mapped. */
631 if (overlay_debugging)
632 {
633 section = find_pc_overlay (addr);
634 if (pc_in_unmapped_range (addr, section))
635 {
636 *unmapped = 1;
637 addr = overlay_mapped_address (addr, section);
638 }
639 }
640
641 /* First try to find the address in the symbol table, then
642 in the minsyms. Take the closest one. */
643
644 /* This is defective in the sense that it only finds text symbols. So
645 really this is kind of pointless--we should make sure that the
646 minimal symbols have everything we need (by changing that we could
647 save some memory, but for many debug format--ELF/DWARF or
648 anything/stabs--it would be inconvenient to eliminate those minimal
649 symbols anyway). */
650 msymbol = lookup_minimal_symbol_by_pc_section (addr, section);
651 symbol = find_pc_sect_function (addr, section);
652
653 if (symbol)
654 {
655 name_location = BLOCK_START (SYMBOL_BLOCK_VALUE (symbol));
656 if (do_demangle || asm_demangle)
657 name_temp = SYMBOL_PRINT_NAME (symbol);
658 else
659 name_temp = SYMBOL_LINKAGE_NAME (symbol);
660 }
661
662 if (msymbol != NULL)
663 {
664 if (SYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL)
665 {
666 /* The msymbol is closer to the address than the symbol;
667 use the msymbol instead. */
668 symbol = 0;
669 name_location = SYMBOL_VALUE_ADDRESS (msymbol);
670 if (do_demangle || asm_demangle)
671 name_temp = SYMBOL_PRINT_NAME (msymbol);
672 else
673 name_temp = SYMBOL_LINKAGE_NAME (msymbol);
674 }
675 }
676 if (symbol == NULL && msymbol == NULL)
677 return 1;
678
679 /* If the nearest symbol is too far away, don't print anything symbolic. */
680
681 /* For when CORE_ADDR is larger than unsigned int, we do math in
682 CORE_ADDR. But when we detect unsigned wraparound in the
683 CORE_ADDR math, we ignore this test and print the offset,
684 because addr+max_symbolic_offset has wrapped through the end
685 of the address space back to the beginning, giving bogus comparison. */
686 if (addr > name_location + max_symbolic_offset
687 && name_location + max_symbolic_offset > name_location)
688 return 1;
689
690 *offset = addr - name_location;
691
692 *name = xstrdup (name_temp);
693
694 if (print_symbol_filename)
695 {
696 struct symtab_and_line sal;
697
698 sal = find_pc_sect_line (addr, section, 0);
699
700 if (sal.symtab)
701 {
702 *filename = xstrdup (sal.symtab->filename);
703 *line = sal.line;
704 }
705 }
706 return 0;
707 }
708
709
710 /* Print address ADDR symbolically on STREAM.
711 First print it as a number. Then perhaps print
712 <SYMBOL + OFFSET> after the number. */
713
714 void
715 print_address (CORE_ADDR addr, struct ui_file *stream)
716 {
717 fputs_filtered (paddress (addr), stream);
718 print_address_symbolic (addr, stream, asm_demangle, " ");
719 }
720
721 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
722 controls whether to print the symbolic name "raw" or demangled.
723 Global setting "addressprint" controls whether to print hex address
724 or not. */
725
726 void
727 print_address_demangle (CORE_ADDR addr, struct ui_file *stream,
728 int do_demangle)
729 {
730 struct value_print_options opts;
731 get_user_print_options (&opts);
732 if (addr == 0)
733 {
734 fprintf_filtered (stream, "0");
735 }
736 else if (opts.addressprint)
737 {
738 fputs_filtered (paddress (addr), stream);
739 print_address_symbolic (addr, stream, do_demangle, " ");
740 }
741 else
742 {
743 print_address_symbolic (addr, stream, do_demangle, "");
744 }
745 }
746 \f
747
748 /* These are the types that $__ will get after an examine command of one
749 of these sizes. */
750
751 static struct type *examine_i_type;
752
753 static struct type *examine_b_type;
754 static struct type *examine_h_type;
755 static struct type *examine_w_type;
756 static struct type *examine_g_type;
757
758 /* Examine data at address ADDR in format FMT.
759 Fetch it from memory and print on gdb_stdout. */
760
761 static void
762 do_examine (struct format_data fmt, CORE_ADDR addr)
763 {
764 char format = 0;
765 char size;
766 int count = 1;
767 struct type *val_type = NULL;
768 int i;
769 int maxelts;
770 struct value_print_options opts;
771
772 format = fmt.format;
773 size = fmt.size;
774 count = fmt.count;
775 next_address = addr;
776
777 /* String or instruction format implies fetch single bytes
778 regardless of the specified size. */
779 if (format == 's' || format == 'i')
780 size = 'b';
781
782 if (format == 'i')
783 val_type = examine_i_type;
784 else if (size == 'b')
785 val_type = examine_b_type;
786 else if (size == 'h')
787 val_type = examine_h_type;
788 else if (size == 'w')
789 val_type = examine_w_type;
790 else if (size == 'g')
791 val_type = examine_g_type;
792
793 maxelts = 8;
794 if (size == 'w')
795 maxelts = 4;
796 if (size == 'g')
797 maxelts = 2;
798 if (format == 's' || format == 'i')
799 maxelts = 1;
800
801 get_formatted_print_options (&opts, format);
802
803 /* Print as many objects as specified in COUNT, at most maxelts per line,
804 with the address of the next one at the start of each line. */
805
806 while (count > 0)
807 {
808 QUIT;
809 print_address (next_address, gdb_stdout);
810 printf_filtered (":");
811 for (i = maxelts;
812 i > 0 && count > 0;
813 i--, count--)
814 {
815 printf_filtered ("\t");
816 /* Note that print_formatted sets next_address for the next
817 object. */
818 last_examine_address = next_address;
819
820 if (last_examine_value)
821 value_free (last_examine_value);
822
823 /* The value to be displayed is not fetched greedily.
824 Instead, to avoid the possibility of a fetched value not
825 being used, its retrieval is delayed until the print code
826 uses it. When examining an instruction stream, the
827 disassembler will perform its own memory fetch using just
828 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
829 the disassembler be modified so that LAST_EXAMINE_VALUE
830 is left with the byte sequence from the last complete
831 instruction fetched from memory? */
832 last_examine_value = value_at_lazy (val_type, next_address);
833
834 if (last_examine_value)
835 release_value (last_examine_value);
836
837 print_formatted (last_examine_value, size, &opts, gdb_stdout);
838
839 /* Display any branch delay slots following the final insn. */
840 if (format == 'i' && count == 1)
841 count += branch_delay_insns;
842 }
843 printf_filtered ("\n");
844 gdb_flush (gdb_stdout);
845 }
846 }
847 \f
848 static void
849 validate_format (struct format_data fmt, char *cmdname)
850 {
851 if (fmt.size != 0)
852 error (_("Size letters are meaningless in \"%s\" command."), cmdname);
853 if (fmt.count != 1)
854 error (_("Item count other than 1 is meaningless in \"%s\" command."),
855 cmdname);
856 if (fmt.format == 'i')
857 error (_("Format letter \"%c\" is meaningless in \"%s\" command."),
858 fmt.format, cmdname);
859 }
860
861 /* Evaluate string EXP as an expression in the current language and
862 print the resulting value. EXP may contain a format specifier as the
863 first argument ("/x myvar" for example, to print myvar in hex). */
864
865 static void
866 print_command_1 (char *exp, int inspect, int voidprint)
867 {
868 struct expression *expr;
869 struct cleanup *old_chain = 0;
870 char format = 0;
871 struct value *val;
872 struct format_data fmt;
873 int cleanup = 0;
874
875 if (exp && *exp == '/')
876 {
877 exp++;
878 fmt = decode_format (&exp, last_format, 0);
879 validate_format (fmt, "print");
880 last_format = format = fmt.format;
881 }
882 else
883 {
884 fmt.count = 1;
885 fmt.format = 0;
886 fmt.size = 0;
887 fmt.raw = 0;
888 }
889
890 if (exp && *exp)
891 {
892 struct type *type;
893 expr = parse_expression (exp);
894 old_chain = make_cleanup (free_current_contents, &expr);
895 cleanup = 1;
896 val = evaluate_expression (expr);
897 }
898 else
899 val = access_value_history (0);
900
901 if (voidprint || (val && value_type (val) &&
902 TYPE_CODE (value_type (val)) != TYPE_CODE_VOID))
903 {
904 struct value_print_options opts;
905 int histindex = record_latest_value (val);
906
907 if (histindex >= 0)
908 annotate_value_history_begin (histindex, value_type (val));
909 else
910 annotate_value_begin (value_type (val));
911
912 if (inspect)
913 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"",
914 exp, histindex);
915 else if (histindex >= 0)
916 printf_filtered ("$%d = ", histindex);
917
918 if (histindex >= 0)
919 annotate_value_history_value ();
920
921 get_formatted_print_options (&opts, format);
922 opts.inspect_it = inspect;
923 opts.raw = fmt.raw;
924
925 print_formatted (val, fmt.size, &opts, gdb_stdout);
926 printf_filtered ("\n");
927
928 if (histindex >= 0)
929 annotate_value_history_end ();
930 else
931 annotate_value_end ();
932
933 if (inspect)
934 printf_unfiltered ("\") )\030");
935 }
936
937 if (cleanup)
938 do_cleanups (old_chain);
939 }
940
941 static void
942 print_command (char *exp, int from_tty)
943 {
944 print_command_1 (exp, 0, 1);
945 }
946
947 /* Same as print, except in epoch, it gets its own window. */
948 static void
949 inspect_command (char *exp, int from_tty)
950 {
951 extern int epoch_interface;
952
953 print_command_1 (exp, epoch_interface, 1);
954 }
955
956 /* Same as print, except it doesn't print void results. */
957 static void
958 call_command (char *exp, int from_tty)
959 {
960 print_command_1 (exp, 0, 0);
961 }
962
963 void
964 output_command (char *exp, int from_tty)
965 {
966 struct expression *expr;
967 struct cleanup *old_chain;
968 char format = 0;
969 struct value *val;
970 struct format_data fmt;
971 struct value_print_options opts;
972
973 fmt.size = 0;
974 fmt.raw = 0;
975
976 if (exp && *exp == '/')
977 {
978 exp++;
979 fmt = decode_format (&exp, 0, 0);
980 validate_format (fmt, "output");
981 format = fmt.format;
982 }
983
984 expr = parse_expression (exp);
985 old_chain = make_cleanup (free_current_contents, &expr);
986
987 val = evaluate_expression (expr);
988
989 annotate_value_begin (value_type (val));
990
991 get_formatted_print_options (&opts, format);
992 opts.raw = fmt.raw;
993 print_formatted (val, fmt.size, &opts, gdb_stdout);
994
995 annotate_value_end ();
996
997 wrap_here ("");
998 gdb_flush (gdb_stdout);
999
1000 do_cleanups (old_chain);
1001 }
1002
1003 static void
1004 set_command (char *exp, int from_tty)
1005 {
1006 struct expression *expr = parse_expression (exp);
1007 struct cleanup *old_chain =
1008 make_cleanup (free_current_contents, &expr);
1009 evaluate_expression (expr);
1010 do_cleanups (old_chain);
1011 }
1012
1013 static void
1014 sym_info (char *arg, int from_tty)
1015 {
1016 struct minimal_symbol *msymbol;
1017 struct objfile *objfile;
1018 struct obj_section *osect;
1019 CORE_ADDR addr, sect_addr;
1020 int matches = 0;
1021 unsigned int offset;
1022
1023 if (!arg)
1024 error_no_arg (_("address"));
1025
1026 addr = parse_and_eval_address (arg);
1027 ALL_OBJSECTIONS (objfile, osect)
1028 {
1029 /* Only process each object file once, even if there's a separate
1030 debug file. */
1031 if (objfile->separate_debug_objfile_backlink)
1032 continue;
1033
1034 sect_addr = overlay_mapped_address (addr, osect);
1035
1036 if (obj_section_addr (osect) <= sect_addr
1037 && sect_addr < obj_section_endaddr (osect)
1038 && (msymbol = lookup_minimal_symbol_by_pc_section (sect_addr, osect)))
1039 {
1040 const char *obj_name, *mapped, *sec_name, *msym_name;
1041 char *loc_string;
1042 struct cleanup *old_chain;
1043
1044 matches = 1;
1045 offset = sect_addr - SYMBOL_VALUE_ADDRESS (msymbol);
1046 mapped = section_is_mapped (osect) ? _("mapped") : _("unmapped");
1047 sec_name = osect->the_bfd_section->name;
1048 msym_name = SYMBOL_PRINT_NAME (msymbol);
1049
1050 /* Don't print the offset if it is zero.
1051 We assume there's no need to handle i18n of "sym + offset". */
1052 if (offset)
1053 loc_string = xstrprintf ("%s + %u", msym_name, offset);
1054 else
1055 loc_string = xstrprintf ("%s", msym_name);
1056
1057 /* Use a cleanup to free loc_string in case the user quits
1058 a pagination request inside printf_filtered. */
1059 old_chain = make_cleanup (xfree, loc_string);
1060
1061 gdb_assert (osect->objfile && osect->objfile->name);
1062 obj_name = osect->objfile->name;
1063
1064 if (MULTI_OBJFILE_P ())
1065 if (pc_in_unmapped_range (addr, osect))
1066 if (section_is_overlay (osect))
1067 printf_filtered (_("%s in load address range of "
1068 "%s overlay section %s of %s\n"),
1069 loc_string, mapped, sec_name, obj_name);
1070 else
1071 printf_filtered (_("%s in load address range of "
1072 "section %s of %s\n"),
1073 loc_string, sec_name, obj_name);
1074 else
1075 if (section_is_overlay (osect))
1076 printf_filtered (_("%s in %s overlay section %s of %s\n"),
1077 loc_string, mapped, sec_name, obj_name);
1078 else
1079 printf_filtered (_("%s in section %s of %s\n"),
1080 loc_string, sec_name, obj_name);
1081 else
1082 if (pc_in_unmapped_range (addr, osect))
1083 if (section_is_overlay (osect))
1084 printf_filtered (_("%s in load address range of %s overlay "
1085 "section %s\n"),
1086 loc_string, mapped, sec_name);
1087 else
1088 printf_filtered (_("%s in load address range of section %s\n"),
1089 loc_string, sec_name);
1090 else
1091 if (section_is_overlay (osect))
1092 printf_filtered (_("%s in %s overlay section %s\n"),
1093 loc_string, mapped, sec_name);
1094 else
1095 printf_filtered (_("%s in section %s\n"),
1096 loc_string, sec_name);
1097
1098 do_cleanups (old_chain);
1099 }
1100 }
1101 if (matches == 0)
1102 printf_filtered (_("No symbol matches %s.\n"), arg);
1103 }
1104
1105 static void
1106 address_info (char *exp, int from_tty)
1107 {
1108 struct gdbarch *gdbarch;
1109 int regno;
1110 struct symbol *sym;
1111 struct minimal_symbol *msymbol;
1112 long val;
1113 struct obj_section *section;
1114 CORE_ADDR load_addr;
1115 int is_a_field_of_this; /* C++: lookup_symbol sets this to nonzero
1116 if exp is a field of `this'. */
1117
1118 if (exp == 0)
1119 error (_("Argument required."));
1120
1121 sym = lookup_symbol (exp, get_selected_block (0), VAR_DOMAIN,
1122 &is_a_field_of_this);
1123 if (sym == NULL)
1124 {
1125 if (is_a_field_of_this)
1126 {
1127 printf_filtered ("Symbol \"");
1128 fprintf_symbol_filtered (gdb_stdout, exp,
1129 current_language->la_language, DMGL_ANSI);
1130 printf_filtered ("\" is a field of the local class variable ");
1131 if (current_language->la_language == language_objc)
1132 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1133 else
1134 printf_filtered ("`this'\n");
1135 return;
1136 }
1137
1138 msymbol = lookup_minimal_symbol (exp, NULL, NULL);
1139
1140 if (msymbol != NULL)
1141 {
1142 load_addr = SYMBOL_VALUE_ADDRESS (msymbol);
1143
1144 printf_filtered ("Symbol \"");
1145 fprintf_symbol_filtered (gdb_stdout, exp,
1146 current_language->la_language, DMGL_ANSI);
1147 printf_filtered ("\" is at ");
1148 fputs_filtered (paddress (load_addr), gdb_stdout);
1149 printf_filtered (" in a file compiled without debugging");
1150 section = SYMBOL_OBJ_SECTION (msymbol);
1151 if (section_is_overlay (section))
1152 {
1153 load_addr = overlay_unmapped_address (load_addr, section);
1154 printf_filtered (",\n -- loaded at ");
1155 fputs_filtered (paddress (load_addr), gdb_stdout);
1156 printf_filtered (" in overlay section %s",
1157 section->the_bfd_section->name);
1158 }
1159 printf_filtered (".\n");
1160 }
1161 else
1162 error (_("No symbol \"%s\" in current context."), exp);
1163 return;
1164 }
1165
1166 printf_filtered ("Symbol \"");
1167 fprintf_symbol_filtered (gdb_stdout, SYMBOL_PRINT_NAME (sym),
1168 current_language->la_language, DMGL_ANSI);
1169 printf_filtered ("\" is ");
1170 val = SYMBOL_VALUE (sym);
1171 section = SYMBOL_OBJ_SECTION (sym);
1172 gdbarch = get_objfile_arch (SYMBOL_SYMTAB (sym)->objfile);
1173
1174 switch (SYMBOL_CLASS (sym))
1175 {
1176 case LOC_CONST:
1177 case LOC_CONST_BYTES:
1178 printf_filtered ("constant");
1179 break;
1180
1181 case LOC_LABEL:
1182 printf_filtered ("a label at address ");
1183 fputs_filtered (paddress (load_addr = SYMBOL_VALUE_ADDRESS (sym)),
1184 gdb_stdout);
1185 if (section_is_overlay (section))
1186 {
1187 load_addr = overlay_unmapped_address (load_addr, section);
1188 printf_filtered (",\n -- loaded at ");
1189 fputs_filtered (paddress (load_addr), gdb_stdout);
1190 printf_filtered (" in overlay section %s",
1191 section->the_bfd_section->name);
1192 }
1193 break;
1194
1195 case LOC_COMPUTED:
1196 /* FIXME: cagney/2004-01-26: It should be possible to
1197 unconditionally call the SYMBOL_COMPUTED_OPS method when available.
1198 Unfortunately DWARF 2 stores the frame-base (instead of the
1199 function) location in a function's symbol. Oops! For the
1200 moment enable this when/where applicable. */
1201 SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, gdb_stdout);
1202 break;
1203
1204 case LOC_REGISTER:
1205 /* GDBARCH is the architecture associated with the objfile the symbol
1206 is defined in; the target architecture may be different, and may
1207 provide additional registers. However, we do not know the target
1208 architecture at this point. We assume the objfile architecture
1209 will contain all the standard registers that occur in debug info
1210 in that objfile. */
1211 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
1212
1213 if (SYMBOL_IS_ARGUMENT (sym))
1214 printf_filtered (_("an argument in register %s"),
1215 gdbarch_register_name (gdbarch, regno));
1216 else
1217 printf_filtered (_("a variable in register %s"),
1218 gdbarch_register_name (gdbarch, regno));
1219 break;
1220
1221 case LOC_STATIC:
1222 printf_filtered (_("static storage at address "));
1223 fputs_filtered (paddress (load_addr = SYMBOL_VALUE_ADDRESS (sym)),
1224 gdb_stdout);
1225 if (section_is_overlay (section))
1226 {
1227 load_addr = overlay_unmapped_address (load_addr, section);
1228 printf_filtered (_(",\n -- loaded at "));
1229 fputs_filtered (paddress (load_addr), gdb_stdout);
1230 printf_filtered (_(" in overlay section %s"),
1231 section->the_bfd_section->name);
1232 }
1233 break;
1234
1235 case LOC_REGPARM_ADDR:
1236 /* Note comment at LOC_REGISTER. */
1237 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch);
1238 printf_filtered (_("address of an argument in register %s"),
1239 gdbarch_register_name (gdbarch, regno));
1240 break;
1241
1242 case LOC_ARG:
1243 printf_filtered (_("an argument at offset %ld"), val);
1244 break;
1245
1246 case LOC_LOCAL:
1247 printf_filtered (_("a local variable at frame offset %ld"), val);
1248 break;
1249
1250 case LOC_REF_ARG:
1251 printf_filtered (_("a reference argument at offset %ld"), val);
1252 break;
1253
1254 case LOC_TYPEDEF:
1255 printf_filtered (_("a typedef"));
1256 break;
1257
1258 case LOC_BLOCK:
1259 printf_filtered (_("a function at address "));
1260 load_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym));
1261 fputs_filtered (paddress (load_addr), gdb_stdout);
1262 if (section_is_overlay (section))
1263 {
1264 load_addr = overlay_unmapped_address (load_addr, section);
1265 printf_filtered (_(",\n -- loaded at "));
1266 fputs_filtered (paddress (load_addr), gdb_stdout);
1267 printf_filtered (_(" in overlay section %s"),
1268 section->the_bfd_section->name);
1269 }
1270 break;
1271
1272 case LOC_UNRESOLVED:
1273 {
1274 struct minimal_symbol *msym;
1275
1276 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym), NULL, NULL);
1277 if (msym == NULL)
1278 printf_filtered ("unresolved");
1279 else
1280 {
1281 section = SYMBOL_OBJ_SECTION (msym);
1282 load_addr = SYMBOL_VALUE_ADDRESS (msym);
1283
1284 if (section
1285 && (section->the_bfd_section->flags & SEC_THREAD_LOCAL) != 0)
1286 printf_filtered (_("a thread-local variable at offset %s "
1287 "in the thread-local storage for `%s'"),
1288 paddr_nz (load_addr), section->objfile->name);
1289 else
1290 {
1291 printf_filtered (_("static storage at address "));
1292 fputs_filtered (paddress (load_addr), gdb_stdout);
1293 if (section_is_overlay (section))
1294 {
1295 load_addr = overlay_unmapped_address (load_addr, section);
1296 printf_filtered (_(",\n -- loaded at "));
1297 fputs_filtered (paddress (load_addr), gdb_stdout);
1298 printf_filtered (_(" in overlay section %s"),
1299 section->the_bfd_section->name);
1300 }
1301 }
1302 }
1303 }
1304 break;
1305
1306 case LOC_OPTIMIZED_OUT:
1307 printf_filtered (_("optimized out"));
1308 break;
1309
1310 default:
1311 printf_filtered (_("of unknown (botched) type"));
1312 break;
1313 }
1314 printf_filtered (".\n");
1315 }
1316 \f
1317
1318 static void
1319 x_command (char *exp, int from_tty)
1320 {
1321 struct expression *expr;
1322 struct format_data fmt;
1323 struct cleanup *old_chain;
1324 struct value *val;
1325
1326 fmt.format = last_format ? last_format : 'x';
1327 fmt.size = last_size;
1328 fmt.count = 1;
1329 fmt.raw = 0;
1330
1331 if (exp && *exp == '/')
1332 {
1333 exp++;
1334 fmt = decode_format (&exp, last_format, last_size);
1335 }
1336
1337 /* If we have an expression, evaluate it and use it as the address. */
1338
1339 if (exp != 0 && *exp != 0)
1340 {
1341 expr = parse_expression (exp);
1342 /* Cause expression not to be there any more if this command is
1343 repeated with Newline. But don't clobber a user-defined
1344 command's definition. */
1345 if (from_tty)
1346 *exp = 0;
1347 old_chain = make_cleanup (free_current_contents, &expr);
1348 val = evaluate_expression (expr);
1349 if (TYPE_CODE (value_type (val)) == TYPE_CODE_REF)
1350 val = value_ind (val);
1351 /* In rvalue contexts, such as this, functions are coerced into
1352 pointers to functions. This makes "x/i main" work. */
1353 if (/* last_format == 'i' && */
1354 TYPE_CODE (value_type (val)) == TYPE_CODE_FUNC
1355 && VALUE_LVAL (val) == lval_memory)
1356 next_address = value_address (val);
1357 else
1358 next_address = value_as_address (val);
1359 do_cleanups (old_chain);
1360 }
1361
1362 do_examine (fmt, next_address);
1363
1364 /* If the examine succeeds, we remember its size and format for next
1365 time. */
1366 last_size = fmt.size;
1367 last_format = fmt.format;
1368
1369 /* Set a couple of internal variables if appropriate. */
1370 if (last_examine_value)
1371 {
1372 /* Make last address examined available to the user as $_. Use
1373 the correct pointer type. */
1374 struct type *pointer_type
1375 = lookup_pointer_type (value_type (last_examine_value));
1376 set_internalvar (lookup_internalvar ("_"),
1377 value_from_pointer (pointer_type,
1378 last_examine_address));
1379
1380 /* Make contents of last address examined available to the user
1381 as $__. If the last value has not been fetched from memory
1382 then don't fetch it now; instead mark it by voiding the $__
1383 variable. */
1384 if (value_lazy (last_examine_value))
1385 clear_internalvar (lookup_internalvar ("__"));
1386 else
1387 set_internalvar (lookup_internalvar ("__"), last_examine_value);
1388 }
1389 }
1390 \f
1391
1392 /* Add an expression to the auto-display chain.
1393 Specify the expression. */
1394
1395 static void
1396 display_command (char *exp, int from_tty)
1397 {
1398 struct format_data fmt;
1399 struct expression *expr;
1400 struct display *new;
1401 int display_it = 1;
1402
1403 #if defined(TUI)
1404 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1405 `tui_version'. */
1406 if (tui_active && exp != NULL && *exp == '$')
1407 display_it = (tui_set_layout_for_display_command (exp) == TUI_FAILURE);
1408 #endif
1409
1410 if (display_it)
1411 {
1412 if (exp == 0)
1413 {
1414 do_displays ();
1415 return;
1416 }
1417
1418 if (*exp == '/')
1419 {
1420 exp++;
1421 fmt = decode_format (&exp, 0, 0);
1422 if (fmt.size && fmt.format == 0)
1423 fmt.format = 'x';
1424 if (fmt.format == 'i' || fmt.format == 's')
1425 fmt.size = 'b';
1426 }
1427 else
1428 {
1429 fmt.format = 0;
1430 fmt.size = 0;
1431 fmt.count = 0;
1432 fmt.raw = 0;
1433 }
1434
1435 innermost_block = NULL;
1436 expr = parse_expression (exp);
1437
1438 new = (struct display *) xmalloc (sizeof (struct display));
1439
1440 new->exp_string = xstrdup (exp);
1441 new->exp = expr;
1442 new->block = innermost_block;
1443 new->next = display_chain;
1444 new->number = ++display_number;
1445 new->format = fmt;
1446 new->enabled_p = 1;
1447 display_chain = new;
1448
1449 if (from_tty && target_has_execution)
1450 do_one_display (new);
1451
1452 dont_repeat ();
1453 }
1454 }
1455
1456 static void
1457 free_display (struct display *d)
1458 {
1459 xfree (d->exp_string);
1460 xfree (d->exp);
1461 xfree (d);
1462 }
1463
1464 /* Clear out the display_chain. Done when new symtabs are loaded,
1465 since this invalidates the types stored in many expressions. */
1466
1467 void
1468 clear_displays (void)
1469 {
1470 struct display *d;
1471
1472 while ((d = display_chain) != NULL)
1473 {
1474 display_chain = d->next;
1475 free_display (d);
1476 }
1477 }
1478
1479 /* Delete the auto-display number NUM. */
1480
1481 static void
1482 delete_display (int num)
1483 {
1484 struct display *d1, *d;
1485
1486 if (!display_chain)
1487 error (_("No display number %d."), num);
1488
1489 if (display_chain->number == num)
1490 {
1491 d1 = display_chain;
1492 display_chain = d1->next;
1493 free_display (d1);
1494 }
1495 else
1496 for (d = display_chain;; d = d->next)
1497 {
1498 if (d->next == 0)
1499 error (_("No display number %d."), num);
1500 if (d->next->number == num)
1501 {
1502 d1 = d->next;
1503 d->next = d1->next;
1504 free_display (d1);
1505 break;
1506 }
1507 }
1508 }
1509
1510 /* Delete some values from the auto-display chain.
1511 Specify the element numbers. */
1512
1513 static void
1514 undisplay_command (char *args, int from_tty)
1515 {
1516 char *p = args;
1517 char *p1;
1518 int num;
1519
1520 if (args == 0)
1521 {
1522 if (query (_("Delete all auto-display expressions? ")))
1523 clear_displays ();
1524 dont_repeat ();
1525 return;
1526 }
1527
1528 while (*p)
1529 {
1530 p1 = p;
1531 while (*p1 >= '0' && *p1 <= '9')
1532 p1++;
1533 if (*p1 && *p1 != ' ' && *p1 != '\t')
1534 error (_("Arguments must be display numbers."));
1535
1536 num = atoi (p);
1537
1538 delete_display (num);
1539
1540 p = p1;
1541 while (*p == ' ' || *p == '\t')
1542 p++;
1543 }
1544 dont_repeat ();
1545 }
1546
1547 /* Display a single auto-display.
1548 Do nothing if the display cannot be printed in the current context,
1549 or if the display is disabled. */
1550
1551 static void
1552 do_one_display (struct display *d)
1553 {
1554 int within_current_scope;
1555
1556 if (d->enabled_p == 0)
1557 return;
1558
1559 if (d->exp == NULL)
1560 {
1561 volatile struct gdb_exception ex;
1562 TRY_CATCH (ex, RETURN_MASK_ALL)
1563 {
1564 innermost_block = NULL;
1565 d->exp = parse_expression (d->exp_string);
1566 d->block = innermost_block;
1567 }
1568 if (ex.reason < 0)
1569 {
1570 /* Can't re-parse the expression. Disable this display item. */
1571 d->enabled_p = 0;
1572 warning (_("Unable to display \"%s\": %s"),
1573 d->exp_string, ex.message);
1574 return;
1575 }
1576 }
1577
1578 if (d->block)
1579 within_current_scope = contained_in (get_selected_block (0), d->block);
1580 else
1581 within_current_scope = 1;
1582 if (!within_current_scope)
1583 return;
1584
1585 current_display_number = d->number;
1586
1587 annotate_display_begin ();
1588 printf_filtered ("%d", d->number);
1589 annotate_display_number_end ();
1590 printf_filtered (": ");
1591 if (d->format.size)
1592 {
1593 CORE_ADDR addr;
1594 struct value *val;
1595
1596 annotate_display_format ();
1597
1598 printf_filtered ("x/");
1599 if (d->format.count != 1)
1600 printf_filtered ("%d", d->format.count);
1601 printf_filtered ("%c", d->format.format);
1602 if (d->format.format != 'i' && d->format.format != 's')
1603 printf_filtered ("%c", d->format.size);
1604 printf_filtered (" ");
1605
1606 annotate_display_expression ();
1607
1608 puts_filtered (d->exp_string);
1609 annotate_display_expression_end ();
1610
1611 if (d->format.count != 1 || d->format.format == 'i')
1612 printf_filtered ("\n");
1613 else
1614 printf_filtered (" ");
1615
1616 val = evaluate_expression (d->exp);
1617 addr = value_as_address (val);
1618 if (d->format.format == 'i')
1619 addr = gdbarch_addr_bits_remove (d->exp->gdbarch, addr);
1620
1621 annotate_display_value ();
1622
1623 do_examine (d->format, addr);
1624 }
1625 else
1626 {
1627 struct value_print_options opts;
1628
1629 annotate_display_format ();
1630
1631 if (d->format.format)
1632 printf_filtered ("/%c ", d->format.format);
1633
1634 annotate_display_expression ();
1635
1636 puts_filtered (d->exp_string);
1637 annotate_display_expression_end ();
1638
1639 printf_filtered (" = ");
1640
1641 annotate_display_expression ();
1642
1643 get_formatted_print_options (&opts, d->format.format);
1644 opts.raw = d->format.raw;
1645 print_formatted (evaluate_expression (d->exp),
1646 d->format.size, &opts, gdb_stdout);
1647 printf_filtered ("\n");
1648 }
1649
1650 annotate_display_end ();
1651
1652 gdb_flush (gdb_stdout);
1653 current_display_number = -1;
1654 }
1655
1656 /* Display all of the values on the auto-display chain which can be
1657 evaluated in the current scope. */
1658
1659 void
1660 do_displays (void)
1661 {
1662 struct display *d;
1663
1664 for (d = display_chain; d; d = d->next)
1665 do_one_display (d);
1666 }
1667
1668 /* Delete the auto-display which we were in the process of displaying.
1669 This is done when there is an error or a signal. */
1670
1671 void
1672 disable_display (int num)
1673 {
1674 struct display *d;
1675
1676 for (d = display_chain; d; d = d->next)
1677 if (d->number == num)
1678 {
1679 d->enabled_p = 0;
1680 return;
1681 }
1682 printf_unfiltered (_("No display number %d.\n"), num);
1683 }
1684
1685 void
1686 disable_current_display (void)
1687 {
1688 if (current_display_number >= 0)
1689 {
1690 disable_display (current_display_number);
1691 fprintf_unfiltered (gdb_stderr, _("\
1692 Disabling display %d to avoid infinite recursion.\n"),
1693 current_display_number);
1694 }
1695 current_display_number = -1;
1696 }
1697
1698 static void
1699 display_info (char *ignore, int from_tty)
1700 {
1701 struct display *d;
1702
1703 if (!display_chain)
1704 printf_unfiltered (_("There are no auto-display expressions now.\n"));
1705 else
1706 printf_filtered (_("Auto-display expressions now in effect:\n\
1707 Num Enb Expression\n"));
1708
1709 for (d = display_chain; d; d = d->next)
1710 {
1711 printf_filtered ("%d: %c ", d->number, "ny"[(int) d->enabled_p]);
1712 if (d->format.size)
1713 printf_filtered ("/%d%c%c ", d->format.count, d->format.size,
1714 d->format.format);
1715 else if (d->format.format)
1716 printf_filtered ("/%c ", d->format.format);
1717 puts_filtered (d->exp_string);
1718 if (d->block && !contained_in (get_selected_block (0), d->block))
1719 printf_filtered (_(" (cannot be evaluated in the current context)"));
1720 printf_filtered ("\n");
1721 gdb_flush (gdb_stdout);
1722 }
1723 }
1724
1725 static void
1726 enable_display (char *args, int from_tty)
1727 {
1728 char *p = args;
1729 char *p1;
1730 int num;
1731 struct display *d;
1732
1733 if (p == 0)
1734 {
1735 for (d = display_chain; d; d = d->next)
1736 d->enabled_p = 1;
1737 }
1738 else
1739 while (*p)
1740 {
1741 p1 = p;
1742 while (*p1 >= '0' && *p1 <= '9')
1743 p1++;
1744 if (*p1 && *p1 != ' ' && *p1 != '\t')
1745 error (_("Arguments must be display numbers."));
1746
1747 num = atoi (p);
1748
1749 for (d = display_chain; d; d = d->next)
1750 if (d->number == num)
1751 {
1752 d->enabled_p = 1;
1753 goto win;
1754 }
1755 printf_unfiltered (_("No display number %d.\n"), num);
1756 win:
1757 p = p1;
1758 while (*p == ' ' || *p == '\t')
1759 p++;
1760 }
1761 }
1762
1763 static void
1764 disable_display_command (char *args, int from_tty)
1765 {
1766 char *p = args;
1767 char *p1;
1768 struct display *d;
1769
1770 if (p == 0)
1771 {
1772 for (d = display_chain; d; d = d->next)
1773 d->enabled_p = 0;
1774 }
1775 else
1776 while (*p)
1777 {
1778 p1 = p;
1779 while (*p1 >= '0' && *p1 <= '9')
1780 p1++;
1781 if (*p1 && *p1 != ' ' && *p1 != '\t')
1782 error (_("Arguments must be display numbers."));
1783
1784 disable_display (atoi (p));
1785
1786 p = p1;
1787 while (*p == ' ' || *p == '\t')
1788 p++;
1789 }
1790 }
1791
1792 /* Return 1 if D uses SOLIB (and will become dangling when SOLIB
1793 is unloaded), otherwise return 0. */
1794
1795 static int
1796 display_uses_solib_p (const struct display *d,
1797 const struct so_list *solib)
1798 {
1799 int endpos;
1800 struct expression *const exp = d->exp;
1801 const union exp_element *const elts = exp->elts;
1802
1803 if (d->block != NULL
1804 && solib_contains_address_p (solib, d->block->startaddr))
1805 return 1;
1806
1807 for (endpos = exp->nelts; endpos > 0; )
1808 {
1809 int i, args, oplen = 0;
1810
1811 exp->language_defn->la_exp_desc->operator_length (exp, endpos,
1812 &oplen, &args);
1813 gdb_assert (oplen > 0);
1814
1815 i = endpos - oplen;
1816 if (elts[i].opcode == OP_VAR_VALUE)
1817 {
1818 const struct block *const block = elts[i + 1].block;
1819 const struct symbol *const symbol = elts[i + 2].symbol;
1820 const struct obj_section *const section =
1821 SYMBOL_OBJ_SECTION (symbol);
1822
1823 if (block != NULL
1824 && solib_contains_address_p (solib, block->startaddr))
1825 return 1;
1826
1827 if (section && section->objfile == solib->objfile)
1828 return 1;
1829 }
1830 endpos -= oplen;
1831 }
1832
1833 return 0;
1834 }
1835
1836 /* display_chain items point to blocks and expressions. Some expressions in
1837 turn may point to symbols.
1838 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are
1839 obstack_free'd when a shared library is unloaded.
1840 Clear pointers that are about to become dangling.
1841 Both .exp and .block fields will be restored next time we need to display
1842 an item by re-parsing .exp_string field in the new execution context. */
1843
1844 static void
1845 clear_dangling_display_expressions (struct so_list *solib)
1846 {
1847 struct display *d;
1848 struct objfile *objfile = NULL;
1849
1850 for (d = display_chain; d; d = d->next)
1851 {
1852 if (d->exp && display_uses_solib_p (d, solib))
1853 {
1854 xfree (d->exp);
1855 d->exp = NULL;
1856 d->block = NULL;
1857 }
1858 }
1859 }
1860 \f
1861
1862 /* Print the value in stack frame FRAME of a variable specified by a
1863 struct symbol. NAME is the name to print; if NULL then VAR's print
1864 name will be used. STREAM is the ui_file on which to print the
1865 value. INDENT specifies the number of indent levels to print
1866 before printing the variable name. */
1867
1868 void
1869 print_variable_and_value (const char *name, struct symbol *var,
1870 struct frame_info *frame,
1871 struct ui_file *stream, int indent)
1872 {
1873 struct value *val;
1874 struct value_print_options opts;
1875
1876 if (!name)
1877 name = SYMBOL_PRINT_NAME (var);
1878
1879 fprintf_filtered (stream, "%s%s = ", n_spaces (2 * indent), name);
1880
1881 val = read_var_value (var, frame);
1882 get_user_print_options (&opts);
1883 common_val_print (val, stream, indent, &opts, current_language);
1884 fprintf_filtered (stream, "\n");
1885 }
1886
1887 static void
1888 printf_command (char *arg, int from_tty)
1889 {
1890 char *f = NULL;
1891 char *s = arg;
1892 char *string = NULL;
1893 struct value **val_args;
1894 char *substrings;
1895 char *current_substring;
1896 int nargs = 0;
1897 int allocated_args = 20;
1898 struct cleanup *old_cleanups;
1899
1900 val_args = xmalloc (allocated_args * sizeof (struct value *));
1901 old_cleanups = make_cleanup (free_current_contents, &val_args);
1902
1903 if (s == 0)
1904 error_no_arg (_("format-control string and values to print"));
1905
1906 /* Skip white space before format string */
1907 while (*s == ' ' || *s == '\t')
1908 s++;
1909
1910 /* A format string should follow, enveloped in double quotes. */
1911 if (*s++ != '"')
1912 error (_("Bad format string, missing '\"'."));
1913
1914 /* Parse the format-control string and copy it into the string STRING,
1915 processing some kinds of escape sequence. */
1916
1917 f = string = (char *) alloca (strlen (s) + 1);
1918
1919 while (*s != '"')
1920 {
1921 int c = *s++;
1922 switch (c)
1923 {
1924 case '\0':
1925 error (_("Bad format string, non-terminated '\"'."));
1926
1927 case '\\':
1928 switch (c = *s++)
1929 {
1930 case '\\':
1931 *f++ = '\\';
1932 break;
1933 case 'a':
1934 *f++ = '\a';
1935 break;
1936 case 'b':
1937 *f++ = '\b';
1938 break;
1939 case 'f':
1940 *f++ = '\f';
1941 break;
1942 case 'n':
1943 *f++ = '\n';
1944 break;
1945 case 'r':
1946 *f++ = '\r';
1947 break;
1948 case 't':
1949 *f++ = '\t';
1950 break;
1951 case 'v':
1952 *f++ = '\v';
1953 break;
1954 case '"':
1955 *f++ = '"';
1956 break;
1957 default:
1958 /* ??? TODO: handle other escape sequences */
1959 error (_("Unrecognized escape character \\%c in format string."),
1960 c);
1961 }
1962 break;
1963
1964 default:
1965 *f++ = c;
1966 }
1967 }
1968
1969 /* Skip over " and following space and comma. */
1970 s++;
1971 *f++ = '\0';
1972 while (*s == ' ' || *s == '\t')
1973 s++;
1974
1975 if (*s != ',' && *s != 0)
1976 error (_("Invalid argument syntax"));
1977
1978 if (*s == ',')
1979 s++;
1980 while (*s == ' ' || *s == '\t')
1981 s++;
1982
1983 /* Need extra space for the '\0's. Doubling the size is sufficient. */
1984 substrings = alloca (strlen (string) * 2);
1985 current_substring = substrings;
1986
1987 {
1988 /* Now scan the string for %-specs and see what kinds of args they want.
1989 argclass[I] classifies the %-specs so we can give printf_filtered
1990 something of the right size. */
1991
1992 enum argclass
1993 {
1994 int_arg, long_arg, long_long_arg, ptr_arg,
1995 string_arg, wide_string_arg, wide_char_arg,
1996 double_arg, long_double_arg, decfloat_arg
1997 };
1998 enum argclass *argclass;
1999 enum argclass this_argclass;
2000 char *last_arg;
2001 int nargs_wanted;
2002 int i;
2003
2004 argclass = (enum argclass *) alloca (strlen (s) * sizeof *argclass);
2005 nargs_wanted = 0;
2006 f = string;
2007 last_arg = string;
2008 while (*f)
2009 if (*f++ == '%')
2010 {
2011 int seen_hash = 0, seen_zero = 0, lcount = 0, seen_prec = 0;
2012 int seen_space = 0, seen_plus = 0;
2013 int seen_big_l = 0, seen_h = 0, seen_big_h = 0;
2014 int seen_big_d = 0, seen_double_big_d = 0;
2015 int bad = 0;
2016
2017 /* Check the validity of the format specifier, and work
2018 out what argument it expects. We only accept C89
2019 format strings, with the exception of long long (which
2020 we autoconf for). */
2021
2022 /* Skip over "%%". */
2023 if (*f == '%')
2024 {
2025 f++;
2026 continue;
2027 }
2028
2029 /* The first part of a format specifier is a set of flag
2030 characters. */
2031 while (strchr ("0-+ #", *f))
2032 {
2033 if (*f == '#')
2034 seen_hash = 1;
2035 else if (*f == '0')
2036 seen_zero = 1;
2037 else if (*f == ' ')
2038 seen_space = 1;
2039 else if (*f == '+')
2040 seen_plus = 1;
2041 f++;
2042 }
2043
2044 /* The next part of a format specifier is a width. */
2045 while (strchr ("0123456789", *f))
2046 f++;
2047
2048 /* The next part of a format specifier is a precision. */
2049 if (*f == '.')
2050 {
2051 seen_prec = 1;
2052 f++;
2053 while (strchr ("0123456789", *f))
2054 f++;
2055 }
2056
2057 /* The next part of a format specifier is a length modifier. */
2058 if (*f == 'h')
2059 {
2060 seen_h = 1;
2061 f++;
2062 }
2063 else if (*f == 'l')
2064 {
2065 f++;
2066 lcount++;
2067 if (*f == 'l')
2068 {
2069 f++;
2070 lcount++;
2071 }
2072 }
2073 else if (*f == 'L')
2074 {
2075 seen_big_l = 1;
2076 f++;
2077 }
2078 /* Decimal32 modifier. */
2079 else if (*f == 'H')
2080 {
2081 seen_big_h = 1;
2082 f++;
2083 }
2084 /* Decimal64 and Decimal128 modifiers. */
2085 else if (*f == 'D')
2086 {
2087 f++;
2088
2089 /* Check for a Decimal128. */
2090 if (*f == 'D')
2091 {
2092 f++;
2093 seen_double_big_d = 1;
2094 }
2095 else
2096 seen_big_d = 1;
2097 }
2098
2099 switch (*f)
2100 {
2101 case 'u':
2102 if (seen_hash)
2103 bad = 1;
2104 /* FALLTHROUGH */
2105
2106 case 'o':
2107 case 'x':
2108 case 'X':
2109 if (seen_space || seen_plus)
2110 bad = 1;
2111 /* FALLTHROUGH */
2112
2113 case 'd':
2114 case 'i':
2115 if (lcount == 0)
2116 this_argclass = int_arg;
2117 else if (lcount == 1)
2118 this_argclass = long_arg;
2119 else
2120 this_argclass = long_long_arg;
2121
2122 if (seen_big_l)
2123 bad = 1;
2124 break;
2125
2126 case 'c':
2127 this_argclass = lcount == 0 ? int_arg : wide_char_arg;
2128 if (lcount > 1 || seen_h || seen_big_l)
2129 bad = 1;
2130 if (seen_prec || seen_zero || seen_space || seen_plus)
2131 bad = 1;
2132 break;
2133
2134 case 'p':
2135 this_argclass = ptr_arg;
2136 if (lcount || seen_h || seen_big_l)
2137 bad = 1;
2138 if (seen_prec || seen_zero || seen_space || seen_plus)
2139 bad = 1;
2140 break;
2141
2142 case 's':
2143 this_argclass = lcount == 0 ? string_arg : wide_string_arg;
2144 if (lcount > 1 || seen_h || seen_big_l)
2145 bad = 1;
2146 if (seen_zero || seen_space || seen_plus)
2147 bad = 1;
2148 break;
2149
2150 case 'e':
2151 case 'f':
2152 case 'g':
2153 case 'E':
2154 case 'G':
2155 if (seen_big_h || seen_big_d || seen_double_big_d)
2156 this_argclass = decfloat_arg;
2157 else if (seen_big_l)
2158 this_argclass = long_double_arg;
2159 else
2160 this_argclass = double_arg;
2161
2162 if (lcount || seen_h)
2163 bad = 1;
2164 break;
2165
2166 case '*':
2167 error (_("`*' not supported for precision or width in printf"));
2168
2169 case 'n':
2170 error (_("Format specifier `n' not supported in printf"));
2171
2172 case '\0':
2173 error (_("Incomplete format specifier at end of format string"));
2174
2175 default:
2176 error (_("Unrecognized format specifier '%c' in printf"), *f);
2177 }
2178
2179 if (bad)
2180 error (_("Inappropriate modifiers to format specifier '%c' in printf"),
2181 *f);
2182
2183 f++;
2184
2185 if (lcount > 1 && USE_PRINTF_I64)
2186 {
2187 /* Windows' printf does support long long, but not the usual way.
2188 Convert %lld to %I64d. */
2189 int length_before_ll = f - last_arg - 1 - lcount;
2190 strncpy (current_substring, last_arg, length_before_ll);
2191 strcpy (current_substring + length_before_ll, "I64");
2192 current_substring[length_before_ll + 3] =
2193 last_arg[length_before_ll + lcount];
2194 current_substring += length_before_ll + 4;
2195 }
2196 else if (this_argclass == wide_string_arg
2197 || this_argclass == wide_char_arg)
2198 {
2199 /* Convert %ls or %lc to %s. */
2200 int length_before_ls = f - last_arg - 2;
2201 strncpy (current_substring, last_arg, length_before_ls);
2202 strcpy (current_substring + length_before_ls, "s");
2203 current_substring += length_before_ls + 2;
2204 }
2205 else
2206 {
2207 strncpy (current_substring, last_arg, f - last_arg);
2208 current_substring += f - last_arg;
2209 }
2210 *current_substring++ = '\0';
2211 last_arg = f;
2212 argclass[nargs_wanted++] = this_argclass;
2213 }
2214
2215 /* Now, parse all arguments and evaluate them.
2216 Store the VALUEs in VAL_ARGS. */
2217
2218 while (*s != '\0')
2219 {
2220 char *s1;
2221 if (nargs == allocated_args)
2222 val_args = (struct value **) xrealloc ((char *) val_args,
2223 (allocated_args *= 2)
2224 * sizeof (struct value *));
2225 s1 = s;
2226 val_args[nargs] = parse_to_comma_and_eval (&s1);
2227
2228 nargs++;
2229 s = s1;
2230 if (*s == ',')
2231 s++;
2232 }
2233
2234 if (nargs != nargs_wanted)
2235 error (_("Wrong number of arguments for specified format-string"));
2236
2237 /* Now actually print them. */
2238 current_substring = substrings;
2239 for (i = 0; i < nargs; i++)
2240 {
2241 switch (argclass[i])
2242 {
2243 case string_arg:
2244 {
2245 gdb_byte *str;
2246 CORE_ADDR tem;
2247 int j;
2248 tem = value_as_address (val_args[i]);
2249
2250 /* This is a %s argument. Find the length of the string. */
2251 for (j = 0;; j++)
2252 {
2253 gdb_byte c;
2254 QUIT;
2255 read_memory (tem + j, &c, 1);
2256 if (c == 0)
2257 break;
2258 }
2259
2260 /* Copy the string contents into a string inside GDB. */
2261 str = (gdb_byte *) alloca (j + 1);
2262 if (j != 0)
2263 read_memory (tem, str, j);
2264 str[j] = 0;
2265
2266 printf_filtered (current_substring, (char *) str);
2267 }
2268 break;
2269 case wide_string_arg:
2270 {
2271 gdb_byte *str;
2272 CORE_ADDR tem;
2273 int j;
2274 struct type *wctype = lookup_typename ("wchar_t", NULL, 0);
2275 int wcwidth = TYPE_LENGTH (wctype);
2276 gdb_byte *buf = alloca (wcwidth);
2277 struct obstack output;
2278 struct cleanup *inner_cleanup;
2279
2280 tem = value_as_address (val_args[i]);
2281
2282 /* This is a %s argument. Find the length of the string. */
2283 for (j = 0;; j += wcwidth)
2284 {
2285 QUIT;
2286 read_memory (tem + j, buf, wcwidth);
2287 if (extract_unsigned_integer (buf, wcwidth) == 0)
2288 break;
2289 }
2290
2291 /* Copy the string contents into a string inside GDB. */
2292 str = (gdb_byte *) alloca (j + wcwidth);
2293 if (j != 0)
2294 read_memory (tem, str, j);
2295 memset (&str[j], 0, wcwidth);
2296
2297 obstack_init (&output);
2298 inner_cleanup = make_cleanup_obstack_free (&output);
2299
2300 convert_between_encodings (target_wide_charset (),
2301 host_charset (),
2302 str, j, wcwidth,
2303 &output, translit_char);
2304 obstack_grow_str0 (&output, "");
2305
2306 printf_filtered (current_substring, obstack_base (&output));
2307 do_cleanups (inner_cleanup);
2308 }
2309 break;
2310 case wide_char_arg:
2311 {
2312 struct type *wctype = lookup_typename ("wchar_t", NULL, 0);
2313 struct type *valtype;
2314 struct obstack output;
2315 struct cleanup *inner_cleanup;
2316 const gdb_byte *bytes;
2317
2318 valtype = value_type (val_args[i]);
2319 if (TYPE_LENGTH (valtype) != TYPE_LENGTH (wctype)
2320 || TYPE_CODE (valtype) != TYPE_CODE_INT)
2321 error (_("expected wchar_t argument for %%lc"));
2322
2323 bytes = value_contents (val_args[i]);
2324
2325 obstack_init (&output);
2326 inner_cleanup = make_cleanup_obstack_free (&output);
2327
2328 convert_between_encodings (target_wide_charset (),
2329 host_charset (),
2330 bytes, TYPE_LENGTH (valtype),
2331 TYPE_LENGTH (valtype),
2332 &output, translit_char);
2333 obstack_grow_str0 (&output, "");
2334
2335 printf_filtered (current_substring, obstack_base (&output));
2336 do_cleanups (inner_cleanup);
2337 }
2338 break;
2339 case double_arg:
2340 {
2341 struct type *type = value_type (val_args[i]);
2342 DOUBLEST val;
2343 int inv;
2344
2345 /* If format string wants a float, unchecked-convert the value
2346 to floating point of the same size. */
2347 type = float_type_from_length (current_gdbarch, type);
2348 val = unpack_double (type, value_contents (val_args[i]), &inv);
2349 if (inv)
2350 error (_("Invalid floating value found in program."));
2351
2352 printf_filtered (current_substring, (double) val);
2353 break;
2354 }
2355 case long_double_arg:
2356 #ifdef HAVE_LONG_DOUBLE
2357 {
2358 struct type *type = value_type (val_args[i]);
2359 DOUBLEST val;
2360 int inv;
2361
2362 /* If format string wants a float, unchecked-convert the value
2363 to floating point of the same size. */
2364 type = float_type_from_length (current_gdbarch, type);
2365 val = unpack_double (type, value_contents (val_args[i]), &inv);
2366 if (inv)
2367 error (_("Invalid floating value found in program."));
2368
2369 printf_filtered (current_substring, (long double) val);
2370 break;
2371 }
2372 #else
2373 error (_("long double not supported in printf"));
2374 #endif
2375 case long_long_arg:
2376 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2377 {
2378 long long val = value_as_long (val_args[i]);
2379 printf_filtered (current_substring, val);
2380 break;
2381 }
2382 #else
2383 error (_("long long not supported in printf"));
2384 #endif
2385 case int_arg:
2386 {
2387 int val = value_as_long (val_args[i]);
2388 printf_filtered (current_substring, val);
2389 break;
2390 }
2391 case long_arg:
2392 {
2393 long val = value_as_long (val_args[i]);
2394 printf_filtered (current_substring, val);
2395 break;
2396 }
2397
2398 /* Handles decimal floating values. */
2399 case decfloat_arg:
2400 {
2401 const gdb_byte *param_ptr = value_contents (val_args[i]);
2402 #if defined (PRINTF_HAS_DECFLOAT)
2403 /* If we have native support for Decimal floating
2404 printing, handle it here. */
2405 printf_filtered (current_substring, param_ptr);
2406 #else
2407
2408 /* As a workaround until vasprintf has native support for DFP
2409 we convert the DFP values to string and print them using
2410 the %s format specifier. */
2411
2412 char *eos, *sos;
2413 int nnull_chars = 0;
2414
2415 /* Parameter data. */
2416 struct type *param_type = value_type (val_args[i]);
2417 unsigned int param_len = TYPE_LENGTH (param_type);
2418
2419 /* DFP output data. */
2420 struct value *dfp_value = NULL;
2421 gdb_byte *dfp_ptr;
2422 int dfp_len = 16;
2423 gdb_byte dec[16];
2424 struct type *dfp_type = NULL;
2425 char decstr[MAX_DECIMAL_STRING];
2426
2427 /* Points to the end of the string so that we can go back
2428 and check for DFP length modifiers. */
2429 eos = current_substring + strlen (current_substring);
2430
2431 /* Look for the float/double format specifier. */
2432 while (*eos != 'f' && *eos != 'e' && *eos != 'E'
2433 && *eos != 'g' && *eos != 'G')
2434 eos--;
2435
2436 sos = eos;
2437
2438 /* Search for the '%' char and extract the size and type of
2439 the output decimal value based on its modifiers
2440 (%Hf, %Df, %DDf). */
2441 while (*--sos != '%')
2442 {
2443 if (*sos == 'H')
2444 {
2445 dfp_len = 4;
2446 dfp_type = builtin_type (current_gdbarch)->builtin_decfloat;
2447 }
2448 else if (*sos == 'D' && *(sos - 1) == 'D')
2449 {
2450 dfp_len = 16;
2451 dfp_type = builtin_type (current_gdbarch)->builtin_declong;
2452 sos--;
2453 }
2454 else
2455 {
2456 dfp_len = 8;
2457 dfp_type = builtin_type (current_gdbarch)->builtin_decdouble;
2458 }
2459 }
2460
2461 /* Replace %Hf, %Df and %DDf with %s's. */
2462 *++sos = 's';
2463
2464 /* Go through the whole format string and pull the correct
2465 number of chars back to compensate for the change in the
2466 format specifier. */
2467 while (nnull_chars < nargs - i)
2468 {
2469 if (*eos == '\0')
2470 nnull_chars++;
2471
2472 *++sos = *++eos;
2473 }
2474
2475 /* Conversion between different DFP types. */
2476 if (TYPE_CODE (param_type) == TYPE_CODE_DECFLOAT)
2477 decimal_convert (param_ptr, param_len, dec, dfp_len);
2478 else
2479 /* If this is a non-trivial conversion, just output 0.
2480 A correct converted value can be displayed by explicitly
2481 casting to a DFP type. */
2482 decimal_from_string (dec, dfp_len, "0");
2483
2484 dfp_value = value_from_decfloat (dfp_type, dec);
2485
2486 dfp_ptr = (gdb_byte *) value_contents (dfp_value);
2487
2488 decimal_to_string (dfp_ptr, dfp_len, decstr);
2489
2490 /* Print the DFP value. */
2491 printf_filtered (current_substring, decstr);
2492
2493 break;
2494 #endif
2495 }
2496
2497 case ptr_arg:
2498 {
2499 /* We avoid the host's %p because pointers are too
2500 likely to be the wrong size. The only interesting
2501 modifier for %p is a width; extract that, and then
2502 handle %p as glibc would: %#x or a literal "(nil)". */
2503
2504 char *p, *fmt, *fmt_p;
2505 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2506 long long val = value_as_long (val_args[i]);
2507 #else
2508 long val = value_as_long (val_args[i]);
2509 #endif
2510
2511 fmt = alloca (strlen (current_substring) + 5);
2512
2513 /* Copy up to the leading %. */
2514 p = current_substring;
2515 fmt_p = fmt;
2516 while (*p)
2517 {
2518 int is_percent = (*p == '%');
2519 *fmt_p++ = *p++;
2520 if (is_percent)
2521 {
2522 if (*p == '%')
2523 *fmt_p++ = *p++;
2524 else
2525 break;
2526 }
2527 }
2528
2529 if (val != 0)
2530 *fmt_p++ = '#';
2531
2532 /* Copy any width. */
2533 while (*p >= '0' && *p < '9')
2534 *fmt_p++ = *p++;
2535
2536 gdb_assert (*p == 'p' && *(p + 1) == '\0');
2537 if (val != 0)
2538 {
2539 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
2540 *fmt_p++ = 'l';
2541 #endif
2542 *fmt_p++ = 'l';
2543 *fmt_p++ = 'x';
2544 *fmt_p++ = '\0';
2545 printf_filtered (fmt, val);
2546 }
2547 else
2548 {
2549 *fmt_p++ = 's';
2550 *fmt_p++ = '\0';
2551 printf_filtered (fmt, "(nil)");
2552 }
2553
2554 break;
2555 }
2556 default:
2557 internal_error (__FILE__, __LINE__,
2558 _("failed internal consistency check"));
2559 }
2560 /* Skip to the next substring. */
2561 current_substring += strlen (current_substring) + 1;
2562 }
2563 /* Print the portion of the format string after the last argument. */
2564 puts_filtered (last_arg);
2565 }
2566 do_cleanups (old_cleanups);
2567 }
2568
2569 void
2570 _initialize_printcmd (void)
2571 {
2572 struct cmd_list_element *c;
2573
2574 current_display_number = -1;
2575
2576 observer_attach_solib_unloaded (clear_dangling_display_expressions);
2577
2578 add_info ("address", address_info,
2579 _("Describe where symbol SYM is stored."));
2580
2581 add_info ("symbol", sym_info, _("\
2582 Describe what symbol is at location ADDR.\n\
2583 Only for symbols with fixed locations (global or static scope)."));
2584
2585 add_com ("x", class_vars, x_command, _("\
2586 Examine memory: x/FMT ADDRESS.\n\
2587 ADDRESS is an expression for the memory address to examine.\n\
2588 FMT is a repeat count followed by a format letter and a size letter.\n\
2589 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2590 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\
2591 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2592 The specified number of objects of the specified size are printed\n\
2593 according to the format.\n\n\
2594 Defaults for format and size letters are those previously used.\n\
2595 Default count is 1. Default address is following last thing printed\n\
2596 with this command or \"print\"."));
2597
2598 #if 0
2599 add_com ("whereis", class_vars, whereis_command,
2600 _("Print line number and file of definition of variable."));
2601 #endif
2602
2603 add_info ("display", display_info, _("\
2604 Expressions to display when program stops, with code numbers."));
2605
2606 add_cmd ("undisplay", class_vars, undisplay_command, _("\
2607 Cancel some expressions to be displayed when program stops.\n\
2608 Arguments are the code numbers of the expressions to stop displaying.\n\
2609 No argument means cancel all automatic-display expressions.\n\
2610 \"delete display\" has the same effect as this command.\n\
2611 Do \"info display\" to see current list of code numbers."),
2612 &cmdlist);
2613
2614 add_com ("display", class_vars, display_command, _("\
2615 Print value of expression EXP each time the program stops.\n\
2616 /FMT may be used before EXP as in the \"print\" command.\n\
2617 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2618 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2619 and examining is done as in the \"x\" command.\n\n\
2620 With no argument, display all currently requested auto-display expressions.\n\
2621 Use \"undisplay\" to cancel display requests previously made."));
2622
2623 add_cmd ("display", class_vars, enable_display, _("\
2624 Enable some expressions to be displayed when program stops.\n\
2625 Arguments are the code numbers of the expressions to resume displaying.\n\
2626 No argument means enable all automatic-display expressions.\n\
2627 Do \"info display\" to see current list of code numbers."), &enablelist);
2628
2629 add_cmd ("display", class_vars, disable_display_command, _("\
2630 Disable some expressions to be displayed when program stops.\n\
2631 Arguments are the code numbers of the expressions to stop displaying.\n\
2632 No argument means disable all automatic-display expressions.\n\
2633 Do \"info display\" to see current list of code numbers."), &disablelist);
2634
2635 add_cmd ("display", class_vars, undisplay_command, _("\
2636 Cancel some expressions to be displayed when program stops.\n\
2637 Arguments are the code numbers of the expressions to stop displaying.\n\
2638 No argument means cancel all automatic-display expressions.\n\
2639 Do \"info display\" to see current list of code numbers."), &deletelist);
2640
2641 add_com ("printf", class_vars, printf_command, _("\
2642 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2643 This is useful for formatted output in user-defined commands."));
2644
2645 add_com ("output", class_vars, output_command, _("\
2646 Like \"print\" but don't put in value history and don't print newline.\n\
2647 This is useful in user-defined commands."));
2648
2649 add_prefix_cmd ("set", class_vars, set_command, _("\
2650 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2651 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2652 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2653 with $), a register (a few standard names starting with $), or an actual\n\
2654 variable in the program being debugged. EXP is any valid expression.\n\
2655 Use \"set variable\" for variables with names identical to set subcommands.\n\
2656 \n\
2657 With a subcommand, this command modifies parts of the gdb environment.\n\
2658 You can see these environment settings with the \"show\" command."),
2659 &setlist, "set ", 1, &cmdlist);
2660 if (dbx_commands)
2661 add_com ("assign", class_vars, set_command, _("\
2662 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2663 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2664 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2665 with $), a register (a few standard names starting with $), or an actual\n\
2666 variable in the program being debugged. EXP is any valid expression.\n\
2667 Use \"set variable\" for variables with names identical to set subcommands.\n\
2668 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2669 You can see these environment settings with the \"show\" command."));
2670
2671 /* "call" is the same as "set", but handy for dbx users to call fns. */
2672 c = add_com ("call", class_vars, call_command, _("\
2673 Call a function in the program.\n\
2674 The argument is the function name and arguments, in the notation of the\n\
2675 current working language. The result is printed and saved in the value\n\
2676 history, if it is not void."));
2677 set_cmd_completer (c, expression_completer);
2678
2679 add_cmd ("variable", class_vars, set_command, _("\
2680 Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2681 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2682 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2683 with $), a register (a few standard names starting with $), or an actual\n\
2684 variable in the program being debugged. EXP is any valid expression.\n\
2685 This may usually be abbreviated to simply \"set\"."),
2686 &setlist);
2687
2688 c = add_com ("print", class_vars, print_command, _("\
2689 Print value of expression EXP.\n\
2690 Variables accessible are those of the lexical environment of the selected\n\
2691 stack frame, plus all those whose scope is global or an entire file.\n\
2692 \n\
2693 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2694 $$NUM refers to NUM'th value back from the last one.\n\
2695 Names starting with $ refer to registers (with the values they would have\n\
2696 if the program were to return to the stack frame now selected, restoring\n\
2697 all registers saved by frames farther in) or else to debugger\n\
2698 \"convenience\" variables (any such name not a known register).\n\
2699 Use assignment expressions to give values to convenience variables.\n\
2700 \n\
2701 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2702 @ is a binary operator for treating consecutive data objects\n\
2703 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2704 element is FOO, whose second element is stored in the space following\n\
2705 where FOO is stored, etc. FOO must be an expression whose value\n\
2706 resides in memory.\n\
2707 \n\
2708 EXP may be preceded with /FMT, where FMT is a format letter\n\
2709 but no count or size letter (see \"x\" command)."));
2710 set_cmd_completer (c, expression_completer);
2711 add_com_alias ("p", "print", class_vars, 1);
2712
2713 c = add_com ("inspect", class_vars, inspect_command, _("\
2714 Same as \"print\" command, except that if you are running in the epoch\n\
2715 environment, the value is printed in its own window."));
2716 set_cmd_completer (c, expression_completer);
2717
2718 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class,
2719 &max_symbolic_offset, _("\
2720 Set the largest offset that will be printed in <symbol+1234> form."), _("\
2721 Show the largest offset that will be printed in <symbol+1234> form."), NULL,
2722 NULL,
2723 show_max_symbolic_offset,
2724 &setprintlist, &showprintlist);
2725 add_setshow_boolean_cmd ("symbol-filename", no_class,
2726 &print_symbol_filename, _("\
2727 Set printing of source filename and line number with <symbol>."), _("\
2728 Show printing of source filename and line number with <symbol>."), NULL,
2729 NULL,
2730 show_print_symbol_filename,
2731 &setprintlist, &showprintlist);
2732
2733 /* For examine/instruction a single byte quantity is specified as
2734 the data. This avoids problems with value_at_lazy() requiring a
2735 valid data type (and rejecting VOID). */
2736 examine_i_type = init_type (TYPE_CODE_INT, 1, 0, "examine_i_type", NULL);
2737
2738 examine_b_type = init_type (TYPE_CODE_INT, 1, 0, "examine_b_type", NULL);
2739 examine_h_type = init_type (TYPE_CODE_INT, 2, 0, "examine_h_type", NULL);
2740 examine_w_type = init_type (TYPE_CODE_INT, 4, 0, "examine_w_type", NULL);
2741 examine_g_type = init_type (TYPE_CODE_INT, 8, 0, "examine_g_type", NULL);
2742
2743 }
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