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1 | /* Print values for GNU debugger GDB. | |
2 | ||
3 | Copyright (C) 1986-2017 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GDB. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 3 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #include "defs.h" | |
21 | #include "frame.h" | |
22 | #include "symtab.h" | |
23 | #include "gdbtypes.h" | |
24 | #include "value.h" | |
25 | #include "language.h" | |
26 | #include "expression.h" | |
27 | #include "gdbcore.h" | |
28 | #include "gdbcmd.h" | |
29 | #include "target.h" | |
30 | #include "breakpoint.h" | |
31 | #include "demangle.h" | |
32 | #include "gdb-demangle.h" | |
33 | #include "valprint.h" | |
34 | #include "annotate.h" | |
35 | #include "symfile.h" /* for overlay functions */ | |
36 | #include "objfiles.h" /* ditto */ | |
37 | #include "completer.h" /* for completion functions */ | |
38 | #include "ui-out.h" | |
39 | #include "block.h" | |
40 | #include "disasm.h" | |
41 | #include "dfp.h" | |
42 | #include "observer.h" | |
43 | #include "solist.h" | |
44 | #include "parser-defs.h" | |
45 | #include "charset.h" | |
46 | #include "arch-utils.h" | |
47 | #include "cli/cli-utils.h" | |
48 | #include "cli/cli-script.h" | |
49 | #include "format.h" | |
50 | #include "source.h" | |
51 | ||
52 | #ifdef TUI | |
53 | #include "tui/tui.h" /* For tui_active et al. */ | |
54 | #endif | |
55 | ||
56 | /* Last specified output format. */ | |
57 | ||
58 | static char last_format = 0; | |
59 | ||
60 | /* Last specified examination size. 'b', 'h', 'w' or `q'. */ | |
61 | ||
62 | static char last_size = 'w'; | |
63 | ||
64 | /* Default address to examine next, and associated architecture. */ | |
65 | ||
66 | static struct gdbarch *next_gdbarch; | |
67 | static CORE_ADDR next_address; | |
68 | ||
69 | /* Number of delay instructions following current disassembled insn. */ | |
70 | ||
71 | static int branch_delay_insns; | |
72 | ||
73 | /* Last address examined. */ | |
74 | ||
75 | static CORE_ADDR last_examine_address; | |
76 | ||
77 | /* Contents of last address examined. | |
78 | This is not valid past the end of the `x' command! */ | |
79 | ||
80 | static struct value *last_examine_value; | |
81 | ||
82 | /* Largest offset between a symbolic value and an address, that will be | |
83 | printed as `0x1234 <symbol+offset>'. */ | |
84 | ||
85 | static unsigned int max_symbolic_offset = UINT_MAX; | |
86 | static void | |
87 | show_max_symbolic_offset (struct ui_file *file, int from_tty, | |
88 | struct cmd_list_element *c, const char *value) | |
89 | { | |
90 | fprintf_filtered (file, | |
91 | _("The largest offset that will be " | |
92 | "printed in <symbol+1234> form is %s.\n"), | |
93 | value); | |
94 | } | |
95 | ||
96 | /* Append the source filename and linenumber of the symbol when | |
97 | printing a symbolic value as `<symbol at filename:linenum>' if set. */ | |
98 | static int print_symbol_filename = 0; | |
99 | static void | |
100 | show_print_symbol_filename (struct ui_file *file, int from_tty, | |
101 | struct cmd_list_element *c, const char *value) | |
102 | { | |
103 | fprintf_filtered (file, _("Printing of source filename and " | |
104 | "line number with <symbol> is %s.\n"), | |
105 | value); | |
106 | } | |
107 | ||
108 | /* Number of auto-display expression currently being displayed. | |
109 | So that we can disable it if we get a signal within it. | |
110 | -1 when not doing one. */ | |
111 | ||
112 | static int current_display_number; | |
113 | ||
114 | struct display | |
115 | { | |
116 | /* Chain link to next auto-display item. */ | |
117 | struct display *next; | |
118 | ||
119 | /* The expression as the user typed it. */ | |
120 | char *exp_string; | |
121 | ||
122 | /* Expression to be evaluated and displayed. */ | |
123 | expression_up exp; | |
124 | ||
125 | /* Item number of this auto-display item. */ | |
126 | int number; | |
127 | ||
128 | /* Display format specified. */ | |
129 | struct format_data format; | |
130 | ||
131 | /* Program space associated with `block'. */ | |
132 | struct program_space *pspace; | |
133 | ||
134 | /* Innermost block required by this expression when evaluated. */ | |
135 | const struct block *block; | |
136 | ||
137 | /* Status of this display (enabled or disabled). */ | |
138 | int enabled_p; | |
139 | }; | |
140 | ||
141 | /* Chain of expressions whose values should be displayed | |
142 | automatically each time the program stops. */ | |
143 | ||
144 | static struct display *display_chain; | |
145 | ||
146 | static int display_number; | |
147 | ||
148 | /* Walk the following statement or block through all displays. | |
149 | ALL_DISPLAYS_SAFE does so even if the statement deletes the current | |
150 | display. */ | |
151 | ||
152 | #define ALL_DISPLAYS(B) \ | |
153 | for (B = display_chain; B; B = B->next) | |
154 | ||
155 | #define ALL_DISPLAYS_SAFE(B,TMP) \ | |
156 | for (B = display_chain; \ | |
157 | B ? (TMP = B->next, 1): 0; \ | |
158 | B = TMP) | |
159 | ||
160 | /* Prototypes for exported functions. */ | |
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 (const char **string_ptr, int oformat, int osize) | |
181 | { | |
182 | struct format_data val; | |
183 | const char *p = *string_ptr; | |
184 | ||
185 | val.format = '?'; | |
186 | val.size = '?'; | |
187 | val.count = 1; | |
188 | val.raw = 0; | |
189 | ||
190 | if (*p == '-') | |
191 | { | |
192 | val.count = -1; | |
193 | p++; | |
194 | } | |
195 | if (*p >= '0' && *p <= '9') | |
196 | val.count *= atoi (p); | |
197 | while (*p >= '0' && *p <= '9') | |
198 | p++; | |
199 | ||
200 | /* Now process size or format letters that follow. */ | |
201 | ||
202 | while (1) | |
203 | { | |
204 | if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g') | |
205 | val.size = *p++; | |
206 | else if (*p == 'r') | |
207 | { | |
208 | val.raw = 1; | |
209 | p++; | |
210 | } | |
211 | else if (*p >= 'a' && *p <= 'z') | |
212 | val.format = *p++; | |
213 | else | |
214 | break; | |
215 | } | |
216 | ||
217 | while (*p == ' ' || *p == '\t') | |
218 | p++; | |
219 | *string_ptr = p; | |
220 | ||
221 | /* Set defaults for format and size if not specified. */ | |
222 | if (val.format == '?') | |
223 | { | |
224 | if (val.size == '?') | |
225 | { | |
226 | /* Neither has been specified. */ | |
227 | val.format = oformat; | |
228 | val.size = osize; | |
229 | } | |
230 | else | |
231 | /* If a size is specified, any format makes a reasonable | |
232 | default except 'i'. */ | |
233 | val.format = oformat == 'i' ? 'x' : oformat; | |
234 | } | |
235 | else if (val.size == '?') | |
236 | switch (val.format) | |
237 | { | |
238 | case 'a': | |
239 | /* Pick the appropriate size for an address. This is deferred | |
240 | until do_examine when we know the actual architecture to use. | |
241 | A special size value of 'a' is used to indicate this case. */ | |
242 | val.size = osize ? 'a' : osize; | |
243 | break; | |
244 | case 'f': | |
245 | /* Floating point has to be word or giantword. */ | |
246 | if (osize == 'w' || osize == 'g') | |
247 | val.size = osize; | |
248 | else | |
249 | /* Default it to giantword if the last used size is not | |
250 | appropriate. */ | |
251 | val.size = osize ? 'g' : osize; | |
252 | break; | |
253 | case 'c': | |
254 | /* Characters default to one byte. */ | |
255 | val.size = osize ? 'b' : osize; | |
256 | break; | |
257 | case 's': | |
258 | /* Display strings with byte size chars unless explicitly | |
259 | specified. */ | |
260 | val.size = '\0'; | |
261 | break; | |
262 | ||
263 | default: | |
264 | /* The default is the size most recently specified. */ | |
265 | val.size = osize; | |
266 | } | |
267 | ||
268 | return val; | |
269 | } | |
270 | \f | |
271 | /* Print value VAL on stream according to OPTIONS. | |
272 | Do not end with a newline. | |
273 | SIZE is the letter for the size of datum being printed. | |
274 | This is used to pad hex numbers so they line up. SIZE is 0 | |
275 | for print / output and set for examine. */ | |
276 | ||
277 | static void | |
278 | print_formatted (struct value *val, int size, | |
279 | const struct value_print_options *options, | |
280 | struct ui_file *stream) | |
281 | { | |
282 | struct type *type = check_typedef (value_type (val)); | |
283 | int len = TYPE_LENGTH (type); | |
284 | ||
285 | if (VALUE_LVAL (val) == lval_memory) | |
286 | next_address = value_address (val) + len; | |
287 | ||
288 | if (size) | |
289 | { | |
290 | switch (options->format) | |
291 | { | |
292 | case 's': | |
293 | { | |
294 | struct type *elttype = value_type (val); | |
295 | ||
296 | next_address = (value_address (val) | |
297 | + val_print_string (elttype, NULL, | |
298 | value_address (val), -1, | |
299 | stream, options) * len); | |
300 | } | |
301 | return; | |
302 | ||
303 | case 'i': | |
304 | /* We often wrap here if there are long symbolic names. */ | |
305 | wrap_here (" "); | |
306 | next_address = (value_address (val) | |
307 | + gdb_print_insn (get_type_arch (type), | |
308 | value_address (val), stream, | |
309 | &branch_delay_insns)); | |
310 | return; | |
311 | } | |
312 | } | |
313 | ||
314 | if (options->format == 0 || options->format == 's' | |
315 | || TYPE_CODE (type) == TYPE_CODE_REF | |
316 | || TYPE_CODE (type) == TYPE_CODE_ARRAY | |
317 | || TYPE_CODE (type) == TYPE_CODE_STRING | |
318 | || TYPE_CODE (type) == TYPE_CODE_STRUCT | |
319 | || TYPE_CODE (type) == TYPE_CODE_UNION | |
320 | || TYPE_CODE (type) == TYPE_CODE_NAMESPACE) | |
321 | value_print (val, stream, options); | |
322 | else | |
323 | /* User specified format, so don't look to the type to tell us | |
324 | what to do. */ | |
325 | val_print_scalar_formatted (type, | |
326 | value_embedded_offset (val), | |
327 | val, | |
328 | options, size, stream); | |
329 | } | |
330 | ||
331 | /* Return builtin floating point type of same length as TYPE. | |
332 | If no such type is found, return TYPE itself. */ | |
333 | static struct type * | |
334 | float_type_from_length (struct type *type) | |
335 | { | |
336 | struct gdbarch *gdbarch = get_type_arch (type); | |
337 | const struct builtin_type *builtin = builtin_type (gdbarch); | |
338 | ||
339 | if (TYPE_LENGTH (type) == TYPE_LENGTH (builtin->builtin_float)) | |
340 | type = builtin->builtin_float; | |
341 | else if (TYPE_LENGTH (type) == TYPE_LENGTH (builtin->builtin_double)) | |
342 | type = builtin->builtin_double; | |
343 | else if (TYPE_LENGTH (type) == TYPE_LENGTH (builtin->builtin_long_double)) | |
344 | type = builtin->builtin_long_double; | |
345 | ||
346 | return type; | |
347 | } | |
348 | ||
349 | /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR, | |
350 | according to OPTIONS and SIZE on STREAM. Formats s and i are not | |
351 | supported at this level. */ | |
352 | ||
353 | void | |
354 | print_scalar_formatted (const gdb_byte *valaddr, struct type *type, | |
355 | const struct value_print_options *options, | |
356 | int size, struct ui_file *stream) | |
357 | { | |
358 | struct gdbarch *gdbarch = get_type_arch (type); | |
359 | LONGEST val_long = 0; | |
360 | unsigned int len = TYPE_LENGTH (type); | |
361 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
362 | ||
363 | /* String printing should go through val_print_scalar_formatted. */ | |
364 | gdb_assert (options->format != 's'); | |
365 | ||
366 | if (len > sizeof(LONGEST) | |
367 | && (TYPE_CODE (type) == TYPE_CODE_INT | |
368 | || TYPE_CODE (type) == TYPE_CODE_ENUM)) | |
369 | { | |
370 | switch (options->format) | |
371 | { | |
372 | case 'o': | |
373 | print_octal_chars (stream, valaddr, len, byte_order); | |
374 | return; | |
375 | case 'u': | |
376 | case 'd': | |
377 | print_decimal_chars (stream, valaddr, len, byte_order); | |
378 | return; | |
379 | case 't': | |
380 | print_binary_chars (stream, valaddr, len, byte_order); | |
381 | return; | |
382 | case 'x': | |
383 | print_hex_chars (stream, valaddr, len, byte_order); | |
384 | return; | |
385 | case 'c': | |
386 | print_char_chars (stream, type, valaddr, len, byte_order); | |
387 | return; | |
388 | default: | |
389 | break; | |
390 | }; | |
391 | } | |
392 | ||
393 | if (options->format != 'f') | |
394 | val_long = unpack_long (type, valaddr); | |
395 | ||
396 | /* If the value is a pointer, and pointers and addresses are not the | |
397 | same, then at this point, the value's length (in target bytes) is | |
398 | gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */ | |
399 | if (TYPE_CODE (type) == TYPE_CODE_PTR) | |
400 | len = gdbarch_addr_bit (gdbarch) / TARGET_CHAR_BIT; | |
401 | ||
402 | /* If we are printing it as unsigned, truncate it in case it is actually | |
403 | a negative signed value (e.g. "print/u (short)-1" should print 65535 | |
404 | (if shorts are 16 bits) instead of 4294967295). */ | |
405 | if (options->format != 'd' || TYPE_UNSIGNED (type)) | |
406 | { | |
407 | if (len < sizeof (LONGEST)) | |
408 | val_long &= ((LONGEST) 1 << HOST_CHAR_BIT * len) - 1; | |
409 | } | |
410 | ||
411 | switch (options->format) | |
412 | { | |
413 | case 'x': | |
414 | if (!size) | |
415 | { | |
416 | /* No size specified, like in print. Print varying # of digits. */ | |
417 | print_longest (stream, 'x', 1, val_long); | |
418 | } | |
419 | else | |
420 | switch (size) | |
421 | { | |
422 | case 'b': | |
423 | case 'h': | |
424 | case 'w': | |
425 | case 'g': | |
426 | print_longest (stream, size, 1, val_long); | |
427 | break; | |
428 | default: | |
429 | error (_("Undefined output size \"%c\"."), size); | |
430 | } | |
431 | break; | |
432 | ||
433 | case 'd': | |
434 | print_longest (stream, 'd', 1, val_long); | |
435 | break; | |
436 | ||
437 | case 'u': | |
438 | print_longest (stream, 'u', 0, val_long); | |
439 | break; | |
440 | ||
441 | case 'o': | |
442 | if (val_long) | |
443 | print_longest (stream, 'o', 1, val_long); | |
444 | else | |
445 | fprintf_filtered (stream, "0"); | |
446 | break; | |
447 | ||
448 | case 'a': | |
449 | { | |
450 | CORE_ADDR addr = unpack_pointer (type, valaddr); | |
451 | ||
452 | print_address (gdbarch, addr, stream); | |
453 | } | |
454 | break; | |
455 | ||
456 | case 'c': | |
457 | { | |
458 | struct value_print_options opts = *options; | |
459 | ||
460 | opts.format = 0; | |
461 | if (TYPE_UNSIGNED (type)) | |
462 | type = builtin_type (gdbarch)->builtin_true_unsigned_char; | |
463 | else | |
464 | type = builtin_type (gdbarch)->builtin_true_char; | |
465 | ||
466 | value_print (value_from_longest (type, val_long), stream, &opts); | |
467 | } | |
468 | break; | |
469 | ||
470 | case 'f': | |
471 | type = float_type_from_length (type); | |
472 | print_floating (valaddr, type, stream); | |
473 | break; | |
474 | ||
475 | case 0: | |
476 | internal_error (__FILE__, __LINE__, | |
477 | _("failed internal consistency check")); | |
478 | ||
479 | case 't': | |
480 | /* Binary; 't' stands for "two". */ | |
481 | { | |
482 | char bits[8 * (sizeof val_long) + 1]; | |
483 | char buf[8 * (sizeof val_long) + 32]; | |
484 | char *cp = bits; | |
485 | int width; | |
486 | ||
487 | if (!size) | |
488 | width = 8 * (sizeof val_long); | |
489 | else | |
490 | switch (size) | |
491 | { | |
492 | case 'b': | |
493 | width = 8; | |
494 | break; | |
495 | case 'h': | |
496 | width = 16; | |
497 | break; | |
498 | case 'w': | |
499 | width = 32; | |
500 | break; | |
501 | case 'g': | |
502 | width = 64; | |
503 | break; | |
504 | default: | |
505 | error (_("Undefined output size \"%c\"."), size); | |
506 | } | |
507 | ||
508 | bits[width] = '\0'; | |
509 | while (width-- > 0) | |
510 | { | |
511 | bits[width] = (val_long & 1) ? '1' : '0'; | |
512 | val_long >>= 1; | |
513 | } | |
514 | if (!size) | |
515 | { | |
516 | while (*cp && *cp == '0') | |
517 | cp++; | |
518 | if (*cp == '\0') | |
519 | cp--; | |
520 | } | |
521 | strncpy (buf, cp, sizeof (bits)); | |
522 | fputs_filtered (buf, stream); | |
523 | } | |
524 | break; | |
525 | ||
526 | case 'z': | |
527 | print_hex_chars (stream, valaddr, len, byte_order); | |
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_gdbarch = gdbarch; | |
544 | next_address = addr; | |
545 | ||
546 | /* Make address available to the user as $_. */ | |
547 | set_internalvar (lookup_internalvar ("_"), | |
548 | value_from_pointer (ptr_type, addr)); | |
549 | } | |
550 | ||
551 | /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM, | |
552 | after LEADIN. Print nothing if no symbolic name is found nearby. | |
553 | Optionally also print source file and line number, if available. | |
554 | DO_DEMANGLE controls whether to print a symbol in its native "raw" form, | |
555 | or to interpret it as a possible C++ name and convert it back to source | |
556 | form. However note that DO_DEMANGLE can be overridden by the specific | |
557 | settings of the demangle and asm_demangle variables. Returns | |
558 | non-zero if anything was printed; zero otherwise. */ | |
559 | ||
560 | int | |
561 | print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr, | |
562 | struct ui_file *stream, | |
563 | int do_demangle, char *leadin) | |
564 | { | |
565 | char *name = NULL; | |
566 | char *filename = NULL; | |
567 | int unmapped = 0; | |
568 | int offset = 0; | |
569 | int line = 0; | |
570 | ||
571 | /* Throw away both name and filename. */ | |
572 | struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &name); | |
573 | make_cleanup (free_current_contents, &filename); | |
574 | ||
575 | if (build_address_symbolic (gdbarch, addr, do_demangle, &name, &offset, | |
576 | &filename, &line, &unmapped)) | |
577 | { | |
578 | do_cleanups (cleanup_chain); | |
579 | return 0; | |
580 | } | |
581 | ||
582 | fputs_filtered (leadin, stream); | |
583 | if (unmapped) | |
584 | fputs_filtered ("<*", stream); | |
585 | else | |
586 | fputs_filtered ("<", stream); | |
587 | fputs_filtered (name, stream); | |
588 | if (offset != 0) | |
589 | fprintf_filtered (stream, "+%u", (unsigned int) offset); | |
590 | ||
591 | /* Append source filename and line number if desired. Give specific | |
592 | line # of this addr, if we have it; else line # of the nearest symbol. */ | |
593 | if (print_symbol_filename && filename != NULL) | |
594 | { | |
595 | if (line != -1) | |
596 | fprintf_filtered (stream, " at %s:%d", filename, line); | |
597 | else | |
598 | fprintf_filtered (stream, " in %s", filename); | |
599 | } | |
600 | if (unmapped) | |
601 | fputs_filtered ("*>", stream); | |
602 | else | |
603 | fputs_filtered (">", stream); | |
604 | ||
605 | do_cleanups (cleanup_chain); | |
606 | return 1; | |
607 | } | |
608 | ||
609 | /* Given an address ADDR return all the elements needed to print the | |
610 | address in a symbolic form. NAME can be mangled or not depending | |
611 | on DO_DEMANGLE (and also on the asm_demangle global variable, | |
612 | manipulated via ''set print asm-demangle''). Return 0 in case of | |
613 | success, when all the info in the OUT paramters is valid. Return 1 | |
614 | otherwise. */ | |
615 | int | |
616 | build_address_symbolic (struct gdbarch *gdbarch, | |
617 | CORE_ADDR addr, /* IN */ | |
618 | int do_demangle, /* IN */ | |
619 | char **name, /* OUT */ | |
620 | int *offset, /* OUT */ | |
621 | char **filename, /* OUT */ | |
622 | int *line, /* OUT */ | |
623 | int *unmapped) /* OUT */ | |
624 | { | |
625 | struct bound_minimal_symbol msymbol; | |
626 | struct symbol *symbol; | |
627 | CORE_ADDR name_location = 0; | |
628 | struct obj_section *section = NULL; | |
629 | const char *name_temp = ""; | |
630 | ||
631 | /* Let's say it is mapped (not unmapped). */ | |
632 | *unmapped = 0; | |
633 | ||
634 | /* Determine if the address is in an overlay, and whether it is | |
635 | mapped. */ | |
636 | if (overlay_debugging) | |
637 | { | |
638 | section = find_pc_overlay (addr); | |
639 | if (pc_in_unmapped_range (addr, section)) | |
640 | { | |
641 | *unmapped = 1; | |
642 | addr = overlay_mapped_address (addr, section); | |
643 | } | |
644 | } | |
645 | ||
646 | /* First try to find the address in the symbol table, then | |
647 | in the minsyms. Take the closest one. */ | |
648 | ||
649 | /* This is defective in the sense that it only finds text symbols. So | |
650 | really this is kind of pointless--we should make sure that the | |
651 | minimal symbols have everything we need (by changing that we could | |
652 | save some memory, but for many debug format--ELF/DWARF or | |
653 | anything/stabs--it would be inconvenient to eliminate those minimal | |
654 | symbols anyway). */ | |
655 | msymbol = lookup_minimal_symbol_by_pc_section (addr, section); | |
656 | symbol = find_pc_sect_function (addr, section); | |
657 | ||
658 | if (symbol) | |
659 | { | |
660 | /* If this is a function (i.e. a code address), strip out any | |
661 | non-address bits. For instance, display a pointer to the | |
662 | first instruction of a Thumb function as <function>; the | |
663 | second instruction will be <function+2>, even though the | |
664 | pointer is <function+3>. This matches the ISA behavior. */ | |
665 | addr = gdbarch_addr_bits_remove (gdbarch, addr); | |
666 | ||
667 | name_location = BLOCK_START (SYMBOL_BLOCK_VALUE (symbol)); | |
668 | if (do_demangle || asm_demangle) | |
669 | name_temp = SYMBOL_PRINT_NAME (symbol); | |
670 | else | |
671 | name_temp = SYMBOL_LINKAGE_NAME (symbol); | |
672 | } | |
673 | ||
674 | if (msymbol.minsym != NULL | |
675 | && MSYMBOL_HAS_SIZE (msymbol.minsym) | |
676 | && MSYMBOL_SIZE (msymbol.minsym) == 0 | |
677 | && MSYMBOL_TYPE (msymbol.minsym) != mst_text | |
678 | && MSYMBOL_TYPE (msymbol.minsym) != mst_text_gnu_ifunc | |
679 | && MSYMBOL_TYPE (msymbol.minsym) != mst_file_text) | |
680 | msymbol.minsym = NULL; | |
681 | ||
682 | if (msymbol.minsym != NULL) | |
683 | { | |
684 | if (BMSYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL) | |
685 | { | |
686 | /* If this is a function (i.e. a code address), strip out any | |
687 | non-address bits. For instance, display a pointer to the | |
688 | first instruction of a Thumb function as <function>; the | |
689 | second instruction will be <function+2>, even though the | |
690 | pointer is <function+3>. This matches the ISA behavior. */ | |
691 | if (MSYMBOL_TYPE (msymbol.minsym) == mst_text | |
692 | || MSYMBOL_TYPE (msymbol.minsym) == mst_text_gnu_ifunc | |
693 | || MSYMBOL_TYPE (msymbol.minsym) == mst_file_text | |
694 | || MSYMBOL_TYPE (msymbol.minsym) == mst_solib_trampoline) | |
695 | addr = gdbarch_addr_bits_remove (gdbarch, addr); | |
696 | ||
697 | /* The msymbol is closer to the address than the symbol; | |
698 | use the msymbol instead. */ | |
699 | symbol = 0; | |
700 | name_location = BMSYMBOL_VALUE_ADDRESS (msymbol); | |
701 | if (do_demangle || asm_demangle) | |
702 | name_temp = MSYMBOL_PRINT_NAME (msymbol.minsym); | |
703 | else | |
704 | name_temp = MSYMBOL_LINKAGE_NAME (msymbol.minsym); | |
705 | } | |
706 | } | |
707 | if (symbol == NULL && msymbol.minsym == NULL) | |
708 | return 1; | |
709 | ||
710 | /* If the nearest symbol is too far away, don't print anything symbolic. */ | |
711 | ||
712 | /* For when CORE_ADDR is larger than unsigned int, we do math in | |
713 | CORE_ADDR. But when we detect unsigned wraparound in the | |
714 | CORE_ADDR math, we ignore this test and print the offset, | |
715 | because addr+max_symbolic_offset has wrapped through the end | |
716 | of the address space back to the beginning, giving bogus comparison. */ | |
717 | if (addr > name_location + max_symbolic_offset | |
718 | && name_location + max_symbolic_offset > name_location) | |
719 | return 1; | |
720 | ||
721 | *offset = addr - name_location; | |
722 | ||
723 | *name = xstrdup (name_temp); | |
724 | ||
725 | if (print_symbol_filename) | |
726 | { | |
727 | struct symtab_and_line sal; | |
728 | ||
729 | sal = find_pc_sect_line (addr, section, 0); | |
730 | ||
731 | if (sal.symtab) | |
732 | { | |
733 | *filename = xstrdup (symtab_to_filename_for_display (sal.symtab)); | |
734 | *line = sal.line; | |
735 | } | |
736 | } | |
737 | return 0; | |
738 | } | |
739 | ||
740 | ||
741 | /* Print address ADDR symbolically on STREAM. | |
742 | First print it as a number. Then perhaps print | |
743 | <SYMBOL + OFFSET> after the number. */ | |
744 | ||
745 | void | |
746 | print_address (struct gdbarch *gdbarch, | |
747 | CORE_ADDR addr, struct ui_file *stream) | |
748 | { | |
749 | fputs_filtered (paddress (gdbarch, addr), stream); | |
750 | print_address_symbolic (gdbarch, addr, stream, asm_demangle, " "); | |
751 | } | |
752 | ||
753 | /* Return a prefix for instruction address: | |
754 | "=> " for current instruction, else " ". */ | |
755 | ||
756 | const char * | |
757 | pc_prefix (CORE_ADDR addr) | |
758 | { | |
759 | if (has_stack_frames ()) | |
760 | { | |
761 | struct frame_info *frame; | |
762 | CORE_ADDR pc; | |
763 | ||
764 | frame = get_selected_frame (NULL); | |
765 | if (get_frame_pc_if_available (frame, &pc) && pc == addr) | |
766 | return "=> "; | |
767 | } | |
768 | return " "; | |
769 | } | |
770 | ||
771 | /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE | |
772 | controls whether to print the symbolic name "raw" or demangled. | |
773 | Return non-zero if anything was printed; zero otherwise. */ | |
774 | ||
775 | int | |
776 | print_address_demangle (const struct value_print_options *opts, | |
777 | struct gdbarch *gdbarch, CORE_ADDR addr, | |
778 | struct ui_file *stream, int do_demangle) | |
779 | { | |
780 | if (opts->addressprint) | |
781 | { | |
782 | fputs_filtered (paddress (gdbarch, addr), stream); | |
783 | print_address_symbolic (gdbarch, addr, stream, do_demangle, " "); | |
784 | } | |
785 | else | |
786 | { | |
787 | return print_address_symbolic (gdbarch, addr, stream, do_demangle, ""); | |
788 | } | |
789 | return 1; | |
790 | } | |
791 | \f | |
792 | ||
793 | /* Find the address of the instruction that is INST_COUNT instructions before | |
794 | the instruction at ADDR. | |
795 | Since some architectures have variable-length instructions, we can't just | |
796 | simply subtract INST_COUNT * INSN_LEN from ADDR. Instead, we use line | |
797 | number information to locate the nearest known instruction boundary, | |
798 | and disassemble forward from there. If we go out of the symbol range | |
799 | during disassembling, we return the lowest address we've got so far and | |
800 | set the number of instructions read to INST_READ. */ | |
801 | ||
802 | static CORE_ADDR | |
803 | find_instruction_backward (struct gdbarch *gdbarch, CORE_ADDR addr, | |
804 | int inst_count, int *inst_read) | |
805 | { | |
806 | /* The vector PCS is used to store instruction addresses within | |
807 | a pc range. */ | |
808 | CORE_ADDR loop_start, loop_end, p; | |
809 | VEC (CORE_ADDR) *pcs = NULL; | |
810 | struct symtab_and_line sal; | |
811 | struct cleanup *cleanup = make_cleanup (VEC_cleanup (CORE_ADDR), &pcs); | |
812 | ||
813 | *inst_read = 0; | |
814 | loop_start = loop_end = addr; | |
815 | ||
816 | /* In each iteration of the outer loop, we get a pc range that ends before | |
817 | LOOP_START, then we count and store every instruction address of the range | |
818 | iterated in the loop. | |
819 | If the number of instructions counted reaches INST_COUNT, return the | |
820 | stored address that is located INST_COUNT instructions back from ADDR. | |
821 | If INST_COUNT is not reached, we subtract the number of counted | |
822 | instructions from INST_COUNT, and go to the next iteration. */ | |
823 | do | |
824 | { | |
825 | VEC_truncate (CORE_ADDR, pcs, 0); | |
826 | sal = find_pc_sect_line (loop_start, NULL, 1); | |
827 | if (sal.line <= 0) | |
828 | { | |
829 | /* We reach here when line info is not available. In this case, | |
830 | we print a message and just exit the loop. The return value | |
831 | is calculated after the loop. */ | |
832 | printf_filtered (_("No line number information available " | |
833 | "for address ")); | |
834 | wrap_here (" "); | |
835 | print_address (gdbarch, loop_start - 1, gdb_stdout); | |
836 | printf_filtered ("\n"); | |
837 | break; | |
838 | } | |
839 | ||
840 | loop_end = loop_start; | |
841 | loop_start = sal.pc; | |
842 | ||
843 | /* This loop pushes instruction addresses in the range from | |
844 | LOOP_START to LOOP_END. */ | |
845 | for (p = loop_start; p < loop_end;) | |
846 | { | |
847 | VEC_safe_push (CORE_ADDR, pcs, p); | |
848 | p += gdb_insn_length (gdbarch, p); | |
849 | } | |
850 | ||
851 | inst_count -= VEC_length (CORE_ADDR, pcs); | |
852 | *inst_read += VEC_length (CORE_ADDR, pcs); | |
853 | } | |
854 | while (inst_count > 0); | |
855 | ||
856 | /* After the loop, the vector PCS has instruction addresses of the last | |
857 | source line we processed, and INST_COUNT has a negative value. | |
858 | We return the address at the index of -INST_COUNT in the vector for | |
859 | the reason below. | |
860 | Let's assume the following instruction addresses and run 'x/-4i 0x400e'. | |
861 | Line X of File | |
862 | 0x4000 | |
863 | 0x4001 | |
864 | 0x4005 | |
865 | Line Y of File | |
866 | 0x4009 | |
867 | 0x400c | |
868 | => 0x400e | |
869 | 0x4011 | |
870 | find_instruction_backward is called with INST_COUNT = 4 and expected to | |
871 | return 0x4001. When we reach here, INST_COUNT is set to -1 because | |
872 | it was subtracted by 2 (from Line Y) and 3 (from Line X). The value | |
873 | 4001 is located at the index 1 of the last iterated line (= Line X), | |
874 | which is simply calculated by -INST_COUNT. | |
875 | The case when the length of PCS is 0 means that we reached an area for | |
876 | which line info is not available. In such case, we return LOOP_START, | |
877 | which was the lowest instruction address that had line info. */ | |
878 | p = VEC_length (CORE_ADDR, pcs) > 0 | |
879 | ? VEC_index (CORE_ADDR, pcs, -inst_count) | |
880 | : loop_start; | |
881 | ||
882 | /* INST_READ includes all instruction addresses in a pc range. Need to | |
883 | exclude the beginning part up to the address we're returning. That | |
884 | is, exclude {0x4000} in the example above. */ | |
885 | if (inst_count < 0) | |
886 | *inst_read += inst_count; | |
887 | ||
888 | do_cleanups (cleanup); | |
889 | return p; | |
890 | } | |
891 | ||
892 | /* Backward read LEN bytes of target memory from address MEMADDR + LEN, | |
893 | placing the results in GDB's memory from MYADDR + LEN. Returns | |
894 | a count of the bytes actually read. */ | |
895 | ||
896 | static int | |
897 | read_memory_backward (struct gdbarch *gdbarch, | |
898 | CORE_ADDR memaddr, gdb_byte *myaddr, int len) | |
899 | { | |
900 | int errcode; | |
901 | int nread; /* Number of bytes actually read. */ | |
902 | ||
903 | /* First try a complete read. */ | |
904 | errcode = target_read_memory (memaddr, myaddr, len); | |
905 | if (errcode == 0) | |
906 | { | |
907 | /* Got it all. */ | |
908 | nread = len; | |
909 | } | |
910 | else | |
911 | { | |
912 | /* Loop, reading one byte at a time until we get as much as we can. */ | |
913 | memaddr += len; | |
914 | myaddr += len; | |
915 | for (nread = 0; nread < len; ++nread) | |
916 | { | |
917 | errcode = target_read_memory (--memaddr, --myaddr, 1); | |
918 | if (errcode != 0) | |
919 | { | |
920 | /* The read was unsuccessful, so exit the loop. */ | |
921 | printf_filtered (_("Cannot access memory at address %s\n"), | |
922 | paddress (gdbarch, memaddr)); | |
923 | break; | |
924 | } | |
925 | } | |
926 | } | |
927 | return nread; | |
928 | } | |
929 | ||
930 | /* Returns true if X (which is LEN bytes wide) is the number zero. */ | |
931 | ||
932 | static int | |
933 | integer_is_zero (const gdb_byte *x, int len) | |
934 | { | |
935 | int i = 0; | |
936 | ||
937 | while (i < len && x[i] == 0) | |
938 | ++i; | |
939 | return (i == len); | |
940 | } | |
941 | ||
942 | /* Find the start address of a string in which ADDR is included. | |
943 | Basically we search for '\0' and return the next address, | |
944 | but if OPTIONS->PRINT_MAX is smaller than the length of a string, | |
945 | we stop searching and return the address to print characters as many as | |
946 | PRINT_MAX from the string. */ | |
947 | ||
948 | static CORE_ADDR | |
949 | find_string_backward (struct gdbarch *gdbarch, | |
950 | CORE_ADDR addr, int count, int char_size, | |
951 | const struct value_print_options *options, | |
952 | int *strings_counted) | |
953 | { | |
954 | const int chunk_size = 0x20; | |
955 | gdb_byte *buffer = NULL; | |
956 | struct cleanup *cleanup = NULL; | |
957 | int read_error = 0; | |
958 | int chars_read = 0; | |
959 | int chars_to_read = chunk_size; | |
960 | int chars_counted = 0; | |
961 | int count_original = count; | |
962 | CORE_ADDR string_start_addr = addr; | |
963 | ||
964 | gdb_assert (char_size == 1 || char_size == 2 || char_size == 4); | |
965 | buffer = (gdb_byte *) xmalloc (chars_to_read * char_size); | |
966 | cleanup = make_cleanup (xfree, buffer); | |
967 | while (count > 0 && read_error == 0) | |
968 | { | |
969 | int i; | |
970 | ||
971 | addr -= chars_to_read * char_size; | |
972 | chars_read = read_memory_backward (gdbarch, addr, buffer, | |
973 | chars_to_read * char_size); | |
974 | chars_read /= char_size; | |
975 | read_error = (chars_read == chars_to_read) ? 0 : 1; | |
976 | /* Searching for '\0' from the end of buffer in backward direction. */ | |
977 | for (i = 0; i < chars_read && count > 0 ; ++i, ++chars_counted) | |
978 | { | |
979 | int offset = (chars_to_read - i - 1) * char_size; | |
980 | ||
981 | if (integer_is_zero (buffer + offset, char_size) | |
982 | || chars_counted == options->print_max) | |
983 | { | |
984 | /* Found '\0' or reached print_max. As OFFSET is the offset to | |
985 | '\0', we add CHAR_SIZE to return the start address of | |
986 | a string. */ | |
987 | --count; | |
988 | string_start_addr = addr + offset + char_size; | |
989 | chars_counted = 0; | |
990 | } | |
991 | } | |
992 | } | |
993 | ||
994 | /* Update STRINGS_COUNTED with the actual number of loaded strings. */ | |
995 | *strings_counted = count_original - count; | |
996 | ||
997 | if (read_error != 0) | |
998 | { | |
999 | /* In error case, STRING_START_ADDR is pointing to the string that | |
1000 | was last successfully loaded. Rewind the partially loaded string. */ | |
1001 | string_start_addr -= chars_counted * char_size; | |
1002 | } | |
1003 | ||
1004 | do_cleanups (cleanup); | |
1005 | return string_start_addr; | |
1006 | } | |
1007 | ||
1008 | /* Examine data at address ADDR in format FMT. | |
1009 | Fetch it from memory and print on gdb_stdout. */ | |
1010 | ||
1011 | static void | |
1012 | do_examine (struct format_data fmt, struct gdbarch *gdbarch, CORE_ADDR addr) | |
1013 | { | |
1014 | char format = 0; | |
1015 | char size; | |
1016 | int count = 1; | |
1017 | struct type *val_type = NULL; | |
1018 | int i; | |
1019 | int maxelts; | |
1020 | struct value_print_options opts; | |
1021 | int need_to_update_next_address = 0; | |
1022 | CORE_ADDR addr_rewound = 0; | |
1023 | ||
1024 | format = fmt.format; | |
1025 | size = fmt.size; | |
1026 | count = fmt.count; | |
1027 | next_gdbarch = gdbarch; | |
1028 | next_address = addr; | |
1029 | ||
1030 | /* Instruction format implies fetch single bytes | |
1031 | regardless of the specified size. | |
1032 | The case of strings is handled in decode_format, only explicit | |
1033 | size operator are not changed to 'b'. */ | |
1034 | if (format == 'i') | |
1035 | size = 'b'; | |
1036 | ||
1037 | if (size == 'a') | |
1038 | { | |
1039 | /* Pick the appropriate size for an address. */ | |
1040 | if (gdbarch_ptr_bit (next_gdbarch) == 64) | |
1041 | size = 'g'; | |
1042 | else if (gdbarch_ptr_bit (next_gdbarch) == 32) | |
1043 | size = 'w'; | |
1044 | else if (gdbarch_ptr_bit (next_gdbarch) == 16) | |
1045 | size = 'h'; | |
1046 | else | |
1047 | /* Bad value for gdbarch_ptr_bit. */ | |
1048 | internal_error (__FILE__, __LINE__, | |
1049 | _("failed internal consistency check")); | |
1050 | } | |
1051 | ||
1052 | if (size == 'b') | |
1053 | val_type = builtin_type (next_gdbarch)->builtin_int8; | |
1054 | else if (size == 'h') | |
1055 | val_type = builtin_type (next_gdbarch)->builtin_int16; | |
1056 | else if (size == 'w') | |
1057 | val_type = builtin_type (next_gdbarch)->builtin_int32; | |
1058 | else if (size == 'g') | |
1059 | val_type = builtin_type (next_gdbarch)->builtin_int64; | |
1060 | ||
1061 | if (format == 's') | |
1062 | { | |
1063 | struct type *char_type = NULL; | |
1064 | ||
1065 | /* Search for "char16_t" or "char32_t" types or fall back to 8-bit char | |
1066 | if type is not found. */ | |
1067 | if (size == 'h') | |
1068 | char_type = builtin_type (next_gdbarch)->builtin_char16; | |
1069 | else if (size == 'w') | |
1070 | char_type = builtin_type (next_gdbarch)->builtin_char32; | |
1071 | if (char_type) | |
1072 | val_type = char_type; | |
1073 | else | |
1074 | { | |
1075 | if (size != '\0' && size != 'b') | |
1076 | warning (_("Unable to display strings with " | |
1077 | "size '%c', using 'b' instead."), size); | |
1078 | size = 'b'; | |
1079 | val_type = builtin_type (next_gdbarch)->builtin_int8; | |
1080 | } | |
1081 | } | |
1082 | ||
1083 | maxelts = 8; | |
1084 | if (size == 'w') | |
1085 | maxelts = 4; | |
1086 | if (size == 'g') | |
1087 | maxelts = 2; | |
1088 | if (format == 's' || format == 'i') | |
1089 | maxelts = 1; | |
1090 | ||
1091 | get_formatted_print_options (&opts, format); | |
1092 | ||
1093 | if (count < 0) | |
1094 | { | |
1095 | /* This is the negative repeat count case. | |
1096 | We rewind the address based on the given repeat count and format, | |
1097 | then examine memory from there in forward direction. */ | |
1098 | ||
1099 | count = -count; | |
1100 | if (format == 'i') | |
1101 | { | |
1102 | next_address = find_instruction_backward (gdbarch, addr, count, | |
1103 | &count); | |
1104 | } | |
1105 | else if (format == 's') | |
1106 | { | |
1107 | next_address = find_string_backward (gdbarch, addr, count, | |
1108 | TYPE_LENGTH (val_type), | |
1109 | &opts, &count); | |
1110 | } | |
1111 | else | |
1112 | { | |
1113 | next_address = addr - count * TYPE_LENGTH (val_type); | |
1114 | } | |
1115 | ||
1116 | /* The following call to print_formatted updates next_address in every | |
1117 | iteration. In backward case, we store the start address here | |
1118 | and update next_address with it before exiting the function. */ | |
1119 | addr_rewound = (format == 's' | |
1120 | ? next_address - TYPE_LENGTH (val_type) | |
1121 | : next_address); | |
1122 | need_to_update_next_address = 1; | |
1123 | } | |
1124 | ||
1125 | /* Print as many objects as specified in COUNT, at most maxelts per line, | |
1126 | with the address of the next one at the start of each line. */ | |
1127 | ||
1128 | while (count > 0) | |
1129 | { | |
1130 | QUIT; | |
1131 | if (format == 'i') | |
1132 | fputs_filtered (pc_prefix (next_address), gdb_stdout); | |
1133 | print_address (next_gdbarch, next_address, gdb_stdout); | |
1134 | printf_filtered (":"); | |
1135 | for (i = maxelts; | |
1136 | i > 0 && count > 0; | |
1137 | i--, count--) | |
1138 | { | |
1139 | printf_filtered ("\t"); | |
1140 | /* Note that print_formatted sets next_address for the next | |
1141 | object. */ | |
1142 | last_examine_address = next_address; | |
1143 | ||
1144 | if (last_examine_value) | |
1145 | value_free (last_examine_value); | |
1146 | ||
1147 | /* The value to be displayed is not fetched greedily. | |
1148 | Instead, to avoid the possibility of a fetched value not | |
1149 | being used, its retrieval is delayed until the print code | |
1150 | uses it. When examining an instruction stream, the | |
1151 | disassembler will perform its own memory fetch using just | |
1152 | the address stored in LAST_EXAMINE_VALUE. FIXME: Should | |
1153 | the disassembler be modified so that LAST_EXAMINE_VALUE | |
1154 | is left with the byte sequence from the last complete | |
1155 | instruction fetched from memory? */ | |
1156 | last_examine_value = value_at_lazy (val_type, next_address); | |
1157 | ||
1158 | if (last_examine_value) | |
1159 | release_value (last_examine_value); | |
1160 | ||
1161 | print_formatted (last_examine_value, size, &opts, gdb_stdout); | |
1162 | ||
1163 | /* Display any branch delay slots following the final insn. */ | |
1164 | if (format == 'i' && count == 1) | |
1165 | count += branch_delay_insns; | |
1166 | } | |
1167 | printf_filtered ("\n"); | |
1168 | gdb_flush (gdb_stdout); | |
1169 | } | |
1170 | ||
1171 | if (need_to_update_next_address) | |
1172 | next_address = addr_rewound; | |
1173 | } | |
1174 | \f | |
1175 | static void | |
1176 | validate_format (struct format_data fmt, const char *cmdname) | |
1177 | { | |
1178 | if (fmt.size != 0) | |
1179 | error (_("Size letters are meaningless in \"%s\" command."), cmdname); | |
1180 | if (fmt.count != 1) | |
1181 | error (_("Item count other than 1 is meaningless in \"%s\" command."), | |
1182 | cmdname); | |
1183 | if (fmt.format == 'i') | |
1184 | error (_("Format letter \"%c\" is meaningless in \"%s\" command."), | |
1185 | fmt.format, cmdname); | |
1186 | } | |
1187 | ||
1188 | /* Parse print command format string into *FMTP and update *EXPP. | |
1189 | CMDNAME should name the current command. */ | |
1190 | ||
1191 | void | |
1192 | print_command_parse_format (const char **expp, const char *cmdname, | |
1193 | struct format_data *fmtp) | |
1194 | { | |
1195 | const char *exp = *expp; | |
1196 | ||
1197 | if (exp && *exp == '/') | |
1198 | { | |
1199 | exp++; | |
1200 | *fmtp = decode_format (&exp, last_format, 0); | |
1201 | validate_format (*fmtp, cmdname); | |
1202 | last_format = fmtp->format; | |
1203 | } | |
1204 | else | |
1205 | { | |
1206 | fmtp->count = 1; | |
1207 | fmtp->format = 0; | |
1208 | fmtp->size = 0; | |
1209 | fmtp->raw = 0; | |
1210 | } | |
1211 | ||
1212 | *expp = exp; | |
1213 | } | |
1214 | ||
1215 | /* Print VAL to console according to *FMTP, including recording it to | |
1216 | the history. */ | |
1217 | ||
1218 | void | |
1219 | print_value (struct value *val, const struct format_data *fmtp) | |
1220 | { | |
1221 | struct value_print_options opts; | |
1222 | int histindex = record_latest_value (val); | |
1223 | ||
1224 | annotate_value_history_begin (histindex, value_type (val)); | |
1225 | ||
1226 | printf_filtered ("$%d = ", histindex); | |
1227 | ||
1228 | annotate_value_history_value (); | |
1229 | ||
1230 | get_formatted_print_options (&opts, fmtp->format); | |
1231 | opts.raw = fmtp->raw; | |
1232 | ||
1233 | print_formatted (val, fmtp->size, &opts, gdb_stdout); | |
1234 | printf_filtered ("\n"); | |
1235 | ||
1236 | annotate_value_history_end (); | |
1237 | } | |
1238 | ||
1239 | /* Evaluate string EXP as an expression in the current language and | |
1240 | print the resulting value. EXP may contain a format specifier as the | |
1241 | first argument ("/x myvar" for example, to print myvar in hex). */ | |
1242 | ||
1243 | static void | |
1244 | print_command_1 (const char *exp, int voidprint) | |
1245 | { | |
1246 | struct value *val; | |
1247 | struct format_data fmt; | |
1248 | ||
1249 | print_command_parse_format (&exp, "print", &fmt); | |
1250 | ||
1251 | if (exp && *exp) | |
1252 | { | |
1253 | expression_up expr = parse_expression (exp); | |
1254 | val = evaluate_expression (expr.get ()); | |
1255 | } | |
1256 | else | |
1257 | val = access_value_history (0); | |
1258 | ||
1259 | if (voidprint || (val && value_type (val) && | |
1260 | TYPE_CODE (value_type (val)) != TYPE_CODE_VOID)) | |
1261 | print_value (val, &fmt); | |
1262 | } | |
1263 | ||
1264 | static void | |
1265 | print_command (char *exp, int from_tty) | |
1266 | { | |
1267 | print_command_1 (exp, 1); | |
1268 | } | |
1269 | ||
1270 | /* Same as print, except it doesn't print void results. */ | |
1271 | static void | |
1272 | call_command (char *exp, int from_tty) | |
1273 | { | |
1274 | print_command_1 (exp, 0); | |
1275 | } | |
1276 | ||
1277 | /* Implementation of the "output" command. */ | |
1278 | ||
1279 | static void | |
1280 | output_command (char *exp, int from_tty) | |
1281 | { | |
1282 | output_command_const (exp, from_tty); | |
1283 | } | |
1284 | ||
1285 | /* Like output_command, but takes a const string as argument. */ | |
1286 | ||
1287 | void | |
1288 | output_command_const (const char *exp, int from_tty) | |
1289 | { | |
1290 | char format = 0; | |
1291 | struct value *val; | |
1292 | struct format_data fmt; | |
1293 | struct value_print_options opts; | |
1294 | ||
1295 | fmt.size = 0; | |
1296 | fmt.raw = 0; | |
1297 | ||
1298 | if (exp && *exp == '/') | |
1299 | { | |
1300 | exp++; | |
1301 | fmt = decode_format (&exp, 0, 0); | |
1302 | validate_format (fmt, "output"); | |
1303 | format = fmt.format; | |
1304 | } | |
1305 | ||
1306 | expression_up expr = parse_expression (exp); | |
1307 | ||
1308 | val = evaluate_expression (expr.get ()); | |
1309 | ||
1310 | annotate_value_begin (value_type (val)); | |
1311 | ||
1312 | get_formatted_print_options (&opts, format); | |
1313 | opts.raw = fmt.raw; | |
1314 | print_formatted (val, fmt.size, &opts, gdb_stdout); | |
1315 | ||
1316 | annotate_value_end (); | |
1317 | ||
1318 | wrap_here (""); | |
1319 | gdb_flush (gdb_stdout); | |
1320 | } | |
1321 | ||
1322 | static void | |
1323 | set_command (char *exp, int from_tty) | |
1324 | { | |
1325 | expression_up expr = parse_expression (exp); | |
1326 | ||
1327 | if (expr->nelts >= 1) | |
1328 | switch (expr->elts[0].opcode) | |
1329 | { | |
1330 | case UNOP_PREINCREMENT: | |
1331 | case UNOP_POSTINCREMENT: | |
1332 | case UNOP_PREDECREMENT: | |
1333 | case UNOP_POSTDECREMENT: | |
1334 | case BINOP_ASSIGN: | |
1335 | case BINOP_ASSIGN_MODIFY: | |
1336 | case BINOP_COMMA: | |
1337 | break; | |
1338 | default: | |
1339 | warning | |
1340 | (_("Expression is not an assignment (and might have no effect)")); | |
1341 | } | |
1342 | ||
1343 | evaluate_expression (expr.get ()); | |
1344 | } | |
1345 | ||
1346 | static void | |
1347 | sym_info (char *arg, int from_tty) | |
1348 | { | |
1349 | struct minimal_symbol *msymbol; | |
1350 | struct objfile *objfile; | |
1351 | struct obj_section *osect; | |
1352 | CORE_ADDR addr, sect_addr; | |
1353 | int matches = 0; | |
1354 | unsigned int offset; | |
1355 | ||
1356 | if (!arg) | |
1357 | error_no_arg (_("address")); | |
1358 | ||
1359 | addr = parse_and_eval_address (arg); | |
1360 | ALL_OBJSECTIONS (objfile, osect) | |
1361 | { | |
1362 | /* Only process each object file once, even if there's a separate | |
1363 | debug file. */ | |
1364 | if (objfile->separate_debug_objfile_backlink) | |
1365 | continue; | |
1366 | ||
1367 | sect_addr = overlay_mapped_address (addr, osect); | |
1368 | ||
1369 | if (obj_section_addr (osect) <= sect_addr | |
1370 | && sect_addr < obj_section_endaddr (osect) | |
1371 | && (msymbol | |
1372 | = lookup_minimal_symbol_by_pc_section (sect_addr, osect).minsym)) | |
1373 | { | |
1374 | const char *obj_name, *mapped, *sec_name, *msym_name; | |
1375 | char *loc_string; | |
1376 | struct cleanup *old_chain; | |
1377 | ||
1378 | matches = 1; | |
1379 | offset = sect_addr - MSYMBOL_VALUE_ADDRESS (objfile, msymbol); | |
1380 | mapped = section_is_mapped (osect) ? _("mapped") : _("unmapped"); | |
1381 | sec_name = osect->the_bfd_section->name; | |
1382 | msym_name = MSYMBOL_PRINT_NAME (msymbol); | |
1383 | ||
1384 | /* Don't print the offset if it is zero. | |
1385 | We assume there's no need to handle i18n of "sym + offset". */ | |
1386 | if (offset) | |
1387 | loc_string = xstrprintf ("%s + %u", msym_name, offset); | |
1388 | else | |
1389 | loc_string = xstrprintf ("%s", msym_name); | |
1390 | ||
1391 | /* Use a cleanup to free loc_string in case the user quits | |
1392 | a pagination request inside printf_filtered. */ | |
1393 | old_chain = make_cleanup (xfree, loc_string); | |
1394 | ||
1395 | gdb_assert (osect->objfile && objfile_name (osect->objfile)); | |
1396 | obj_name = objfile_name (osect->objfile); | |
1397 | ||
1398 | if (MULTI_OBJFILE_P ()) | |
1399 | if (pc_in_unmapped_range (addr, osect)) | |
1400 | if (section_is_overlay (osect)) | |
1401 | printf_filtered (_("%s in load address range of " | |
1402 | "%s overlay section %s of %s\n"), | |
1403 | loc_string, mapped, sec_name, obj_name); | |
1404 | else | |
1405 | printf_filtered (_("%s in load address range of " | |
1406 | "section %s of %s\n"), | |
1407 | loc_string, sec_name, obj_name); | |
1408 | else | |
1409 | if (section_is_overlay (osect)) | |
1410 | printf_filtered (_("%s in %s overlay section %s of %s\n"), | |
1411 | loc_string, mapped, sec_name, obj_name); | |
1412 | else | |
1413 | printf_filtered (_("%s in section %s of %s\n"), | |
1414 | loc_string, sec_name, obj_name); | |
1415 | else | |
1416 | if (pc_in_unmapped_range (addr, osect)) | |
1417 | if (section_is_overlay (osect)) | |
1418 | printf_filtered (_("%s in load address range of %s overlay " | |
1419 | "section %s\n"), | |
1420 | loc_string, mapped, sec_name); | |
1421 | else | |
1422 | printf_filtered (_("%s in load address range of section %s\n"), | |
1423 | loc_string, sec_name); | |
1424 | else | |
1425 | if (section_is_overlay (osect)) | |
1426 | printf_filtered (_("%s in %s overlay section %s\n"), | |
1427 | loc_string, mapped, sec_name); | |
1428 | else | |
1429 | printf_filtered (_("%s in section %s\n"), | |
1430 | loc_string, sec_name); | |
1431 | ||
1432 | do_cleanups (old_chain); | |
1433 | } | |
1434 | } | |
1435 | if (matches == 0) | |
1436 | printf_filtered (_("No symbol matches %s.\n"), arg); | |
1437 | } | |
1438 | ||
1439 | static void | |
1440 | address_info (char *exp, int from_tty) | |
1441 | { | |
1442 | struct gdbarch *gdbarch; | |
1443 | int regno; | |
1444 | struct symbol *sym; | |
1445 | struct bound_minimal_symbol msymbol; | |
1446 | long val; | |
1447 | struct obj_section *section; | |
1448 | CORE_ADDR load_addr, context_pc = 0; | |
1449 | struct field_of_this_result is_a_field_of_this; | |
1450 | ||
1451 | if (exp == 0) | |
1452 | error (_("Argument required.")); | |
1453 | ||
1454 | sym = lookup_symbol (exp, get_selected_block (&context_pc), VAR_DOMAIN, | |
1455 | &is_a_field_of_this).symbol; | |
1456 | if (sym == NULL) | |
1457 | { | |
1458 | if (is_a_field_of_this.type != NULL) | |
1459 | { | |
1460 | printf_filtered ("Symbol \""); | |
1461 | fprintf_symbol_filtered (gdb_stdout, exp, | |
1462 | current_language->la_language, DMGL_ANSI); | |
1463 | printf_filtered ("\" is a field of the local class variable "); | |
1464 | if (current_language->la_language == language_objc) | |
1465 | printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */ | |
1466 | else | |
1467 | printf_filtered ("`this'\n"); | |
1468 | return; | |
1469 | } | |
1470 | ||
1471 | msymbol = lookup_bound_minimal_symbol (exp); | |
1472 | ||
1473 | if (msymbol.minsym != NULL) | |
1474 | { | |
1475 | struct objfile *objfile = msymbol.objfile; | |
1476 | ||
1477 | gdbarch = get_objfile_arch (objfile); | |
1478 | load_addr = BMSYMBOL_VALUE_ADDRESS (msymbol); | |
1479 | ||
1480 | printf_filtered ("Symbol \""); | |
1481 | fprintf_symbol_filtered (gdb_stdout, exp, | |
1482 | current_language->la_language, DMGL_ANSI); | |
1483 | printf_filtered ("\" is at "); | |
1484 | fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); | |
1485 | printf_filtered (" in a file compiled without debugging"); | |
1486 | section = MSYMBOL_OBJ_SECTION (objfile, msymbol.minsym); | |
1487 | if (section_is_overlay (section)) | |
1488 | { | |
1489 | load_addr = overlay_unmapped_address (load_addr, section); | |
1490 | printf_filtered (",\n -- loaded at "); | |
1491 | fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); | |
1492 | printf_filtered (" in overlay section %s", | |
1493 | section->the_bfd_section->name); | |
1494 | } | |
1495 | printf_filtered (".\n"); | |
1496 | } | |
1497 | else | |
1498 | error (_("No symbol \"%s\" in current context."), exp); | |
1499 | return; | |
1500 | } | |
1501 | ||
1502 | printf_filtered ("Symbol \""); | |
1503 | fprintf_symbol_filtered (gdb_stdout, SYMBOL_PRINT_NAME (sym), | |
1504 | current_language->la_language, DMGL_ANSI); | |
1505 | printf_filtered ("\" is "); | |
1506 | val = SYMBOL_VALUE (sym); | |
1507 | if (SYMBOL_OBJFILE_OWNED (sym)) | |
1508 | section = SYMBOL_OBJ_SECTION (symbol_objfile (sym), sym); | |
1509 | else | |
1510 | section = NULL; | |
1511 | gdbarch = symbol_arch (sym); | |
1512 | ||
1513 | if (SYMBOL_COMPUTED_OPS (sym) != NULL) | |
1514 | { | |
1515 | SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, context_pc, | |
1516 | gdb_stdout); | |
1517 | printf_filtered (".\n"); | |
1518 | return; | |
1519 | } | |
1520 | ||
1521 | switch (SYMBOL_CLASS (sym)) | |
1522 | { | |
1523 | case LOC_CONST: | |
1524 | case LOC_CONST_BYTES: | |
1525 | printf_filtered ("constant"); | |
1526 | break; | |
1527 | ||
1528 | case LOC_LABEL: | |
1529 | printf_filtered ("a label at address "); | |
1530 | load_addr = SYMBOL_VALUE_ADDRESS (sym); | |
1531 | fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); | |
1532 | if (section_is_overlay (section)) | |
1533 | { | |
1534 | load_addr = overlay_unmapped_address (load_addr, section); | |
1535 | printf_filtered (",\n -- loaded at "); | |
1536 | fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); | |
1537 | printf_filtered (" in overlay section %s", | |
1538 | section->the_bfd_section->name); | |
1539 | } | |
1540 | break; | |
1541 | ||
1542 | case LOC_COMPUTED: | |
1543 | gdb_assert_not_reached (_("LOC_COMPUTED variable missing a method")); | |
1544 | ||
1545 | case LOC_REGISTER: | |
1546 | /* GDBARCH is the architecture associated with the objfile the symbol | |
1547 | is defined in; the target architecture may be different, and may | |
1548 | provide additional registers. However, we do not know the target | |
1549 | architecture at this point. We assume the objfile architecture | |
1550 | will contain all the standard registers that occur in debug info | |
1551 | in that objfile. */ | |
1552 | regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch); | |
1553 | ||
1554 | if (SYMBOL_IS_ARGUMENT (sym)) | |
1555 | printf_filtered (_("an argument in register %s"), | |
1556 | gdbarch_register_name (gdbarch, regno)); | |
1557 | else | |
1558 | printf_filtered (_("a variable in register %s"), | |
1559 | gdbarch_register_name (gdbarch, regno)); | |
1560 | break; | |
1561 | ||
1562 | case LOC_STATIC: | |
1563 | printf_filtered (_("static storage at address ")); | |
1564 | load_addr = SYMBOL_VALUE_ADDRESS (sym); | |
1565 | fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); | |
1566 | if (section_is_overlay (section)) | |
1567 | { | |
1568 | load_addr = overlay_unmapped_address (load_addr, section); | |
1569 | printf_filtered (_(",\n -- loaded at ")); | |
1570 | fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); | |
1571 | printf_filtered (_(" in overlay section %s"), | |
1572 | section->the_bfd_section->name); | |
1573 | } | |
1574 | break; | |
1575 | ||
1576 | case LOC_REGPARM_ADDR: | |
1577 | /* Note comment at LOC_REGISTER. */ | |
1578 | regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch); | |
1579 | printf_filtered (_("address of an argument in register %s"), | |
1580 | gdbarch_register_name (gdbarch, regno)); | |
1581 | break; | |
1582 | ||
1583 | case LOC_ARG: | |
1584 | printf_filtered (_("an argument at offset %ld"), val); | |
1585 | break; | |
1586 | ||
1587 | case LOC_LOCAL: | |
1588 | printf_filtered (_("a local variable at frame offset %ld"), val); | |
1589 | break; | |
1590 | ||
1591 | case LOC_REF_ARG: | |
1592 | printf_filtered (_("a reference argument at offset %ld"), val); | |
1593 | break; | |
1594 | ||
1595 | case LOC_TYPEDEF: | |
1596 | printf_filtered (_("a typedef")); | |
1597 | break; | |
1598 | ||
1599 | case LOC_BLOCK: | |
1600 | printf_filtered (_("a function at address ")); | |
1601 | load_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym)); | |
1602 | fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); | |
1603 | if (section_is_overlay (section)) | |
1604 | { | |
1605 | load_addr = overlay_unmapped_address (load_addr, section); | |
1606 | printf_filtered (_(",\n -- loaded at ")); | |
1607 | fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); | |
1608 | printf_filtered (_(" in overlay section %s"), | |
1609 | section->the_bfd_section->name); | |
1610 | } | |
1611 | break; | |
1612 | ||
1613 | case LOC_UNRESOLVED: | |
1614 | { | |
1615 | struct bound_minimal_symbol msym; | |
1616 | ||
1617 | msym = lookup_minimal_symbol_and_objfile (SYMBOL_LINKAGE_NAME (sym)); | |
1618 | if (msym.minsym == NULL) | |
1619 | printf_filtered ("unresolved"); | |
1620 | else | |
1621 | { | |
1622 | section = MSYMBOL_OBJ_SECTION (msym.objfile, msym.minsym); | |
1623 | ||
1624 | if (section | |
1625 | && (section->the_bfd_section->flags & SEC_THREAD_LOCAL) != 0) | |
1626 | { | |
1627 | load_addr = MSYMBOL_VALUE_RAW_ADDRESS (msym.minsym); | |
1628 | printf_filtered (_("a thread-local variable at offset %s " | |
1629 | "in the thread-local storage for `%s'"), | |
1630 | paddress (gdbarch, load_addr), | |
1631 | objfile_name (section->objfile)); | |
1632 | } | |
1633 | else | |
1634 | { | |
1635 | load_addr = BMSYMBOL_VALUE_ADDRESS (msym); | |
1636 | printf_filtered (_("static storage at address ")); | |
1637 | fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); | |
1638 | if (section_is_overlay (section)) | |
1639 | { | |
1640 | load_addr = overlay_unmapped_address (load_addr, section); | |
1641 | printf_filtered (_(",\n -- loaded at ")); | |
1642 | fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); | |
1643 | printf_filtered (_(" in overlay section %s"), | |
1644 | section->the_bfd_section->name); | |
1645 | } | |
1646 | } | |
1647 | } | |
1648 | } | |
1649 | break; | |
1650 | ||
1651 | case LOC_OPTIMIZED_OUT: | |
1652 | printf_filtered (_("optimized out")); | |
1653 | break; | |
1654 | ||
1655 | default: | |
1656 | printf_filtered (_("of unknown (botched) type")); | |
1657 | break; | |
1658 | } | |
1659 | printf_filtered (".\n"); | |
1660 | } | |
1661 | \f | |
1662 | ||
1663 | static void | |
1664 | x_command (char *exp, int from_tty) | |
1665 | { | |
1666 | struct format_data fmt; | |
1667 | struct cleanup *old_chain; | |
1668 | struct value *val; | |
1669 | ||
1670 | fmt.format = last_format ? last_format : 'x'; | |
1671 | fmt.size = last_size; | |
1672 | fmt.count = 1; | |
1673 | fmt.raw = 0; | |
1674 | ||
1675 | if (exp && *exp == '/') | |
1676 | { | |
1677 | const char *tmp = exp + 1; | |
1678 | ||
1679 | fmt = decode_format (&tmp, last_format, last_size); | |
1680 | exp = (char *) tmp; | |
1681 | } | |
1682 | ||
1683 | /* If we have an expression, evaluate it and use it as the address. */ | |
1684 | ||
1685 | if (exp != 0 && *exp != 0) | |
1686 | { | |
1687 | expression_up expr = parse_expression (exp); | |
1688 | /* Cause expression not to be there any more if this command is | |
1689 | repeated with Newline. But don't clobber a user-defined | |
1690 | command's definition. */ | |
1691 | if (from_tty) | |
1692 | *exp = 0; | |
1693 | val = evaluate_expression (expr.get ()); | |
1694 | if (TYPE_IS_REFERENCE (value_type (val))) | |
1695 | val = coerce_ref (val); | |
1696 | /* In rvalue contexts, such as this, functions are coerced into | |
1697 | pointers to functions. This makes "x/i main" work. */ | |
1698 | if (/* last_format == 'i' && */ | |
1699 | TYPE_CODE (value_type (val)) == TYPE_CODE_FUNC | |
1700 | && VALUE_LVAL (val) == lval_memory) | |
1701 | next_address = value_address (val); | |
1702 | else | |
1703 | next_address = value_as_address (val); | |
1704 | ||
1705 | next_gdbarch = expr->gdbarch; | |
1706 | } | |
1707 | ||
1708 | if (!next_gdbarch) | |
1709 | error_no_arg (_("starting display address")); | |
1710 | ||
1711 | do_examine (fmt, next_gdbarch, next_address); | |
1712 | ||
1713 | /* If the examine succeeds, we remember its size and format for next | |
1714 | time. Set last_size to 'b' for strings. */ | |
1715 | if (fmt.format == 's') | |
1716 | last_size = 'b'; | |
1717 | else | |
1718 | last_size = fmt.size; | |
1719 | last_format = fmt.format; | |
1720 | ||
1721 | /* Set a couple of internal variables if appropriate. */ | |
1722 | if (last_examine_value) | |
1723 | { | |
1724 | /* Make last address examined available to the user as $_. Use | |
1725 | the correct pointer type. */ | |
1726 | struct type *pointer_type | |
1727 | = lookup_pointer_type (value_type (last_examine_value)); | |
1728 | set_internalvar (lookup_internalvar ("_"), | |
1729 | value_from_pointer (pointer_type, | |
1730 | last_examine_address)); | |
1731 | ||
1732 | /* Make contents of last address examined available to the user | |
1733 | as $__. If the last value has not been fetched from memory | |
1734 | then don't fetch it now; instead mark it by voiding the $__ | |
1735 | variable. */ | |
1736 | if (value_lazy (last_examine_value)) | |
1737 | clear_internalvar (lookup_internalvar ("__")); | |
1738 | else | |
1739 | set_internalvar (lookup_internalvar ("__"), last_examine_value); | |
1740 | } | |
1741 | } | |
1742 | \f | |
1743 | ||
1744 | /* Add an expression to the auto-display chain. | |
1745 | Specify the expression. */ | |
1746 | ||
1747 | static void | |
1748 | display_command (char *arg, int from_tty) | |
1749 | { | |
1750 | struct format_data fmt; | |
1751 | struct display *newobj; | |
1752 | const char *exp = arg; | |
1753 | ||
1754 | if (exp == 0) | |
1755 | { | |
1756 | do_displays (); | |
1757 | return; | |
1758 | } | |
1759 | ||
1760 | if (*exp == '/') | |
1761 | { | |
1762 | exp++; | |
1763 | fmt = decode_format (&exp, 0, 0); | |
1764 | if (fmt.size && fmt.format == 0) | |
1765 | fmt.format = 'x'; | |
1766 | if (fmt.format == 'i' || fmt.format == 's') | |
1767 | fmt.size = 'b'; | |
1768 | } | |
1769 | else | |
1770 | { | |
1771 | fmt.format = 0; | |
1772 | fmt.size = 0; | |
1773 | fmt.count = 0; | |
1774 | fmt.raw = 0; | |
1775 | } | |
1776 | ||
1777 | innermost_block = NULL; | |
1778 | expression_up expr = parse_expression (exp); | |
1779 | ||
1780 | newobj = new display (); | |
1781 | ||
1782 | newobj->exp_string = xstrdup (exp); | |
1783 | newobj->exp = std::move (expr); | |
1784 | newobj->block = innermost_block; | |
1785 | newobj->pspace = current_program_space; | |
1786 | newobj->number = ++display_number; | |
1787 | newobj->format = fmt; | |
1788 | newobj->enabled_p = 1; | |
1789 | newobj->next = NULL; | |
1790 | ||
1791 | if (display_chain == NULL) | |
1792 | display_chain = newobj; | |
1793 | else | |
1794 | { | |
1795 | struct display *last; | |
1796 | ||
1797 | for (last = display_chain; last->next != NULL; last = last->next) | |
1798 | ; | |
1799 | last->next = newobj; | |
1800 | } | |
1801 | ||
1802 | if (from_tty) | |
1803 | do_one_display (newobj); | |
1804 | ||
1805 | dont_repeat (); | |
1806 | } | |
1807 | ||
1808 | static void | |
1809 | free_display (struct display *d) | |
1810 | { | |
1811 | xfree (d->exp_string); | |
1812 | delete d; | |
1813 | } | |
1814 | ||
1815 | /* Clear out the display_chain. Done when new symtabs are loaded, | |
1816 | since this invalidates the types stored in many expressions. */ | |
1817 | ||
1818 | void | |
1819 | clear_displays (void) | |
1820 | { | |
1821 | struct display *d; | |
1822 | ||
1823 | while ((d = display_chain) != NULL) | |
1824 | { | |
1825 | display_chain = d->next; | |
1826 | free_display (d); | |
1827 | } | |
1828 | } | |
1829 | ||
1830 | /* Delete the auto-display DISPLAY. */ | |
1831 | ||
1832 | static void | |
1833 | delete_display (struct display *display) | |
1834 | { | |
1835 | struct display *d; | |
1836 | ||
1837 | gdb_assert (display != NULL); | |
1838 | ||
1839 | if (display_chain == display) | |
1840 | display_chain = display->next; | |
1841 | ||
1842 | ALL_DISPLAYS (d) | |
1843 | if (d->next == display) | |
1844 | { | |
1845 | d->next = display->next; | |
1846 | break; | |
1847 | } | |
1848 | ||
1849 | free_display (display); | |
1850 | } | |
1851 | ||
1852 | /* Call FUNCTION on each of the displays whose numbers are given in | |
1853 | ARGS. DATA is passed unmodified to FUNCTION. */ | |
1854 | ||
1855 | static void | |
1856 | map_display_numbers (char *args, | |
1857 | void (*function) (struct display *, | |
1858 | void *), | |
1859 | void *data) | |
1860 | { | |
1861 | int num; | |
1862 | ||
1863 | if (args == NULL) | |
1864 | error_no_arg (_("one or more display numbers")); | |
1865 | ||
1866 | number_or_range_parser parser (args); | |
1867 | ||
1868 | while (!parser.finished ()) | |
1869 | { | |
1870 | const char *p = parser.cur_tok (); | |
1871 | ||
1872 | num = parser.get_number (); | |
1873 | if (num == 0) | |
1874 | warning (_("bad display number at or near '%s'"), p); | |
1875 | else | |
1876 | { | |
1877 | struct display *d, *tmp; | |
1878 | ||
1879 | ALL_DISPLAYS_SAFE (d, tmp) | |
1880 | if (d->number == num) | |
1881 | break; | |
1882 | if (d == NULL) | |
1883 | printf_unfiltered (_("No display number %d.\n"), num); | |
1884 | else | |
1885 | function (d, data); | |
1886 | } | |
1887 | } | |
1888 | } | |
1889 | ||
1890 | /* Callback for map_display_numbers, that deletes a display. */ | |
1891 | ||
1892 | static void | |
1893 | do_delete_display (struct display *d, void *data) | |
1894 | { | |
1895 | delete_display (d); | |
1896 | } | |
1897 | ||
1898 | /* "undisplay" command. */ | |
1899 | ||
1900 | static void | |
1901 | undisplay_command (char *args, int from_tty) | |
1902 | { | |
1903 | if (args == NULL) | |
1904 | { | |
1905 | if (query (_("Delete all auto-display expressions? "))) | |
1906 | clear_displays (); | |
1907 | dont_repeat (); | |
1908 | return; | |
1909 | } | |
1910 | ||
1911 | map_display_numbers (args, do_delete_display, NULL); | |
1912 | dont_repeat (); | |
1913 | } | |
1914 | ||
1915 | /* Display a single auto-display. | |
1916 | Do nothing if the display cannot be printed in the current context, | |
1917 | or if the display is disabled. */ | |
1918 | ||
1919 | static void | |
1920 | do_one_display (struct display *d) | |
1921 | { | |
1922 | int within_current_scope; | |
1923 | ||
1924 | if (d->enabled_p == 0) | |
1925 | return; | |
1926 | ||
1927 | /* The expression carries the architecture that was used at parse time. | |
1928 | This is a problem if the expression depends on architecture features | |
1929 | (e.g. register numbers), and the current architecture is now different. | |
1930 | For example, a display statement like "display/i $pc" is expected to | |
1931 | display the PC register of the current architecture, not the arch at | |
1932 | the time the display command was given. Therefore, we re-parse the | |
1933 | expression if the current architecture has changed. */ | |
1934 | if (d->exp != NULL && d->exp->gdbarch != get_current_arch ()) | |
1935 | { | |
1936 | d->exp.reset (); | |
1937 | d->block = NULL; | |
1938 | } | |
1939 | ||
1940 | if (d->exp == NULL) | |
1941 | { | |
1942 | ||
1943 | TRY | |
1944 | { | |
1945 | innermost_block = NULL; | |
1946 | d->exp = parse_expression (d->exp_string); | |
1947 | d->block = innermost_block; | |
1948 | } | |
1949 | CATCH (ex, RETURN_MASK_ALL) | |
1950 | { | |
1951 | /* Can't re-parse the expression. Disable this display item. */ | |
1952 | d->enabled_p = 0; | |
1953 | warning (_("Unable to display \"%s\": %s"), | |
1954 | d->exp_string, ex.message); | |
1955 | return; | |
1956 | } | |
1957 | END_CATCH | |
1958 | } | |
1959 | ||
1960 | if (d->block) | |
1961 | { | |
1962 | if (d->pspace == current_program_space) | |
1963 | within_current_scope = contained_in (get_selected_block (0), d->block); | |
1964 | else | |
1965 | within_current_scope = 0; | |
1966 | } | |
1967 | else | |
1968 | within_current_scope = 1; | |
1969 | if (!within_current_scope) | |
1970 | return; | |
1971 | ||
1972 | scoped_restore save_display_number | |
1973 | = make_scoped_restore (¤t_display_number, d->number); | |
1974 | ||
1975 | annotate_display_begin (); | |
1976 | printf_filtered ("%d", d->number); | |
1977 | annotate_display_number_end (); | |
1978 | printf_filtered (": "); | |
1979 | if (d->format.size) | |
1980 | { | |
1981 | ||
1982 | annotate_display_format (); | |
1983 | ||
1984 | printf_filtered ("x/"); | |
1985 | if (d->format.count != 1) | |
1986 | printf_filtered ("%d", d->format.count); | |
1987 | printf_filtered ("%c", d->format.format); | |
1988 | if (d->format.format != 'i' && d->format.format != 's') | |
1989 | printf_filtered ("%c", d->format.size); | |
1990 | printf_filtered (" "); | |
1991 | ||
1992 | annotate_display_expression (); | |
1993 | ||
1994 | puts_filtered (d->exp_string); | |
1995 | annotate_display_expression_end (); | |
1996 | ||
1997 | if (d->format.count != 1 || d->format.format == 'i') | |
1998 | printf_filtered ("\n"); | |
1999 | else | |
2000 | printf_filtered (" "); | |
2001 | ||
2002 | annotate_display_value (); | |
2003 | ||
2004 | TRY | |
2005 | { | |
2006 | struct value *val; | |
2007 | CORE_ADDR addr; | |
2008 | ||
2009 | val = evaluate_expression (d->exp.get ()); | |
2010 | addr = value_as_address (val); | |
2011 | if (d->format.format == 'i') | |
2012 | addr = gdbarch_addr_bits_remove (d->exp->gdbarch, addr); | |
2013 | do_examine (d->format, d->exp->gdbarch, addr); | |
2014 | } | |
2015 | CATCH (ex, RETURN_MASK_ERROR) | |
2016 | { | |
2017 | fprintf_filtered (gdb_stdout, _("<error: %s>\n"), ex.message); | |
2018 | } | |
2019 | END_CATCH | |
2020 | } | |
2021 | else | |
2022 | { | |
2023 | struct value_print_options opts; | |
2024 | ||
2025 | annotate_display_format (); | |
2026 | ||
2027 | if (d->format.format) | |
2028 | printf_filtered ("/%c ", d->format.format); | |
2029 | ||
2030 | annotate_display_expression (); | |
2031 | ||
2032 | puts_filtered (d->exp_string); | |
2033 | annotate_display_expression_end (); | |
2034 | ||
2035 | printf_filtered (" = "); | |
2036 | ||
2037 | annotate_display_expression (); | |
2038 | ||
2039 | get_formatted_print_options (&opts, d->format.format); | |
2040 | opts.raw = d->format.raw; | |
2041 | ||
2042 | TRY | |
2043 | { | |
2044 | struct value *val; | |
2045 | ||
2046 | val = evaluate_expression (d->exp.get ()); | |
2047 | print_formatted (val, d->format.size, &opts, gdb_stdout); | |
2048 | } | |
2049 | CATCH (ex, RETURN_MASK_ERROR) | |
2050 | { | |
2051 | fprintf_filtered (gdb_stdout, _("<error: %s>"), ex.message); | |
2052 | } | |
2053 | END_CATCH | |
2054 | ||
2055 | printf_filtered ("\n"); | |
2056 | } | |
2057 | ||
2058 | annotate_display_end (); | |
2059 | ||
2060 | gdb_flush (gdb_stdout); | |
2061 | } | |
2062 | ||
2063 | /* Display all of the values on the auto-display chain which can be | |
2064 | evaluated in the current scope. */ | |
2065 | ||
2066 | void | |
2067 | do_displays (void) | |
2068 | { | |
2069 | struct display *d; | |
2070 | ||
2071 | for (d = display_chain; d; d = d->next) | |
2072 | do_one_display (d); | |
2073 | } | |
2074 | ||
2075 | /* Delete the auto-display which we were in the process of displaying. | |
2076 | This is done when there is an error or a signal. */ | |
2077 | ||
2078 | void | |
2079 | disable_display (int num) | |
2080 | { | |
2081 | struct display *d; | |
2082 | ||
2083 | for (d = display_chain; d; d = d->next) | |
2084 | if (d->number == num) | |
2085 | { | |
2086 | d->enabled_p = 0; | |
2087 | return; | |
2088 | } | |
2089 | printf_unfiltered (_("No display number %d.\n"), num); | |
2090 | } | |
2091 | ||
2092 | void | |
2093 | disable_current_display (void) | |
2094 | { | |
2095 | if (current_display_number >= 0) | |
2096 | { | |
2097 | disable_display (current_display_number); | |
2098 | fprintf_unfiltered (gdb_stderr, | |
2099 | _("Disabling display %d to " | |
2100 | "avoid infinite recursion.\n"), | |
2101 | current_display_number); | |
2102 | } | |
2103 | current_display_number = -1; | |
2104 | } | |
2105 | ||
2106 | static void | |
2107 | display_info (char *ignore, int from_tty) | |
2108 | { | |
2109 | struct display *d; | |
2110 | ||
2111 | if (!display_chain) | |
2112 | printf_unfiltered (_("There are no auto-display expressions now.\n")); | |
2113 | else | |
2114 | printf_filtered (_("Auto-display expressions now in effect:\n\ | |
2115 | Num Enb Expression\n")); | |
2116 | ||
2117 | for (d = display_chain; d; d = d->next) | |
2118 | { | |
2119 | printf_filtered ("%d: %c ", d->number, "ny"[(int) d->enabled_p]); | |
2120 | if (d->format.size) | |
2121 | printf_filtered ("/%d%c%c ", d->format.count, d->format.size, | |
2122 | d->format.format); | |
2123 | else if (d->format.format) | |
2124 | printf_filtered ("/%c ", d->format.format); | |
2125 | puts_filtered (d->exp_string); | |
2126 | if (d->block && !contained_in (get_selected_block (0), d->block)) | |
2127 | printf_filtered (_(" (cannot be evaluated in the current context)")); | |
2128 | printf_filtered ("\n"); | |
2129 | gdb_flush (gdb_stdout); | |
2130 | } | |
2131 | } | |
2132 | ||
2133 | /* Callback fo map_display_numbers, that enables or disables the | |
2134 | passed in display D. */ | |
2135 | ||
2136 | static void | |
2137 | do_enable_disable_display (struct display *d, void *data) | |
2138 | { | |
2139 | d->enabled_p = *(int *) data; | |
2140 | } | |
2141 | ||
2142 | /* Implamentation of both the "disable display" and "enable display" | |
2143 | commands. ENABLE decides what to do. */ | |
2144 | ||
2145 | static void | |
2146 | enable_disable_display_command (char *args, int from_tty, int enable) | |
2147 | { | |
2148 | if (args == NULL) | |
2149 | { | |
2150 | struct display *d; | |
2151 | ||
2152 | ALL_DISPLAYS (d) | |
2153 | d->enabled_p = enable; | |
2154 | return; | |
2155 | } | |
2156 | ||
2157 | map_display_numbers (args, do_enable_disable_display, &enable); | |
2158 | } | |
2159 | ||
2160 | /* The "enable display" command. */ | |
2161 | ||
2162 | static void | |
2163 | enable_display_command (char *args, int from_tty) | |
2164 | { | |
2165 | enable_disable_display_command (args, from_tty, 1); | |
2166 | } | |
2167 | ||
2168 | /* The "disable display" command. */ | |
2169 | ||
2170 | static void | |
2171 | disable_display_command (char *args, int from_tty) | |
2172 | { | |
2173 | enable_disable_display_command (args, from_tty, 0); | |
2174 | } | |
2175 | ||
2176 | /* display_chain items point to blocks and expressions. Some expressions in | |
2177 | turn may point to symbols. | |
2178 | Both symbols and blocks are obstack_alloc'd on objfile_stack, and are | |
2179 | obstack_free'd when a shared library is unloaded. | |
2180 | Clear pointers that are about to become dangling. | |
2181 | Both .exp and .block fields will be restored next time we need to display | |
2182 | an item by re-parsing .exp_string field in the new execution context. */ | |
2183 | ||
2184 | static void | |
2185 | clear_dangling_display_expressions (struct objfile *objfile) | |
2186 | { | |
2187 | struct display *d; | |
2188 | struct program_space *pspace; | |
2189 | ||
2190 | /* With no symbol file we cannot have a block or expression from it. */ | |
2191 | if (objfile == NULL) | |
2192 | return; | |
2193 | pspace = objfile->pspace; | |
2194 | if (objfile->separate_debug_objfile_backlink) | |
2195 | { | |
2196 | objfile = objfile->separate_debug_objfile_backlink; | |
2197 | gdb_assert (objfile->pspace == pspace); | |
2198 | } | |
2199 | ||
2200 | for (d = display_chain; d != NULL; d = d->next) | |
2201 | { | |
2202 | if (d->pspace != pspace) | |
2203 | continue; | |
2204 | ||
2205 | if (lookup_objfile_from_block (d->block) == objfile | |
2206 | || (d->exp != NULL && exp_uses_objfile (d->exp.get (), objfile))) | |
2207 | { | |
2208 | d->exp.reset (); | |
2209 | d->block = NULL; | |
2210 | } | |
2211 | } | |
2212 | } | |
2213 | \f | |
2214 | ||
2215 | /* Print the value in stack frame FRAME of a variable specified by a | |
2216 | struct symbol. NAME is the name to print; if NULL then VAR's print | |
2217 | name will be used. STREAM is the ui_file on which to print the | |
2218 | value. INDENT specifies the number of indent levels to print | |
2219 | before printing the variable name. | |
2220 | ||
2221 | This function invalidates FRAME. */ | |
2222 | ||
2223 | void | |
2224 | print_variable_and_value (const char *name, struct symbol *var, | |
2225 | struct frame_info *frame, | |
2226 | struct ui_file *stream, int indent) | |
2227 | { | |
2228 | ||
2229 | if (!name) | |
2230 | name = SYMBOL_PRINT_NAME (var); | |
2231 | ||
2232 | fprintf_filtered (stream, "%s%s = ", n_spaces (2 * indent), name); | |
2233 | TRY | |
2234 | { | |
2235 | struct value *val; | |
2236 | struct value_print_options opts; | |
2237 | ||
2238 | /* READ_VAR_VALUE needs a block in order to deal with non-local | |
2239 | references (i.e. to handle nested functions). In this context, we | |
2240 | print variables that are local to this frame, so we can avoid passing | |
2241 | a block to it. */ | |
2242 | val = read_var_value (var, NULL, frame); | |
2243 | get_user_print_options (&opts); | |
2244 | opts.deref_ref = 1; | |
2245 | common_val_print (val, stream, indent, &opts, current_language); | |
2246 | ||
2247 | /* common_val_print invalidates FRAME when a pretty printer calls inferior | |
2248 | function. */ | |
2249 | frame = NULL; | |
2250 | } | |
2251 | CATCH (except, RETURN_MASK_ERROR) | |
2252 | { | |
2253 | fprintf_filtered(stream, "<error reading variable %s (%s)>", name, | |
2254 | except.message); | |
2255 | } | |
2256 | END_CATCH | |
2257 | ||
2258 | fprintf_filtered (stream, "\n"); | |
2259 | } | |
2260 | ||
2261 | /* Subroutine of ui_printf to simplify it. | |
2262 | Print VALUE to STREAM using FORMAT. | |
2263 | VALUE is a C-style string on the target. */ | |
2264 | ||
2265 | static void | |
2266 | printf_c_string (struct ui_file *stream, const char *format, | |
2267 | struct value *value) | |
2268 | { | |
2269 | gdb_byte *str; | |
2270 | CORE_ADDR tem; | |
2271 | int j; | |
2272 | ||
2273 | tem = value_as_address (value); | |
2274 | ||
2275 | /* This is a %s argument. Find the length of the string. */ | |
2276 | for (j = 0;; j++) | |
2277 | { | |
2278 | gdb_byte c; | |
2279 | ||
2280 | QUIT; | |
2281 | read_memory (tem + j, &c, 1); | |
2282 | if (c == 0) | |
2283 | break; | |
2284 | } | |
2285 | ||
2286 | /* Copy the string contents into a string inside GDB. */ | |
2287 | str = (gdb_byte *) alloca (j + 1); | |
2288 | if (j != 0) | |
2289 | read_memory (tem, str, j); | |
2290 | str[j] = 0; | |
2291 | ||
2292 | fprintf_filtered (stream, format, (char *) str); | |
2293 | } | |
2294 | ||
2295 | /* Subroutine of ui_printf to simplify it. | |
2296 | Print VALUE to STREAM using FORMAT. | |
2297 | VALUE is a wide C-style string on the target. */ | |
2298 | ||
2299 | static void | |
2300 | printf_wide_c_string (struct ui_file *stream, const char *format, | |
2301 | struct value *value) | |
2302 | { | |
2303 | gdb_byte *str; | |
2304 | CORE_ADDR tem; | |
2305 | int j; | |
2306 | struct gdbarch *gdbarch = get_type_arch (value_type (value)); | |
2307 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
2308 | struct type *wctype = lookup_typename (current_language, gdbarch, | |
2309 | "wchar_t", NULL, 0); | |
2310 | int wcwidth = TYPE_LENGTH (wctype); | |
2311 | gdb_byte *buf = (gdb_byte *) alloca (wcwidth); | |
2312 | struct obstack output; | |
2313 | struct cleanup *inner_cleanup; | |
2314 | ||
2315 | tem = value_as_address (value); | |
2316 | ||
2317 | /* This is a %s argument. Find the length of the string. */ | |
2318 | for (j = 0;; j += wcwidth) | |
2319 | { | |
2320 | QUIT; | |
2321 | read_memory (tem + j, buf, wcwidth); | |
2322 | if (extract_unsigned_integer (buf, wcwidth, byte_order) == 0) | |
2323 | break; | |
2324 | } | |
2325 | ||
2326 | /* Copy the string contents into a string inside GDB. */ | |
2327 | str = (gdb_byte *) alloca (j + wcwidth); | |
2328 | if (j != 0) | |
2329 | read_memory (tem, str, j); | |
2330 | memset (&str[j], 0, wcwidth); | |
2331 | ||
2332 | obstack_init (&output); | |
2333 | inner_cleanup = make_cleanup_obstack_free (&output); | |
2334 | ||
2335 | convert_between_encodings (target_wide_charset (gdbarch), | |
2336 | host_charset (), | |
2337 | str, j, wcwidth, | |
2338 | &output, translit_char); | |
2339 | obstack_grow_str0 (&output, ""); | |
2340 | ||
2341 | fprintf_filtered (stream, format, obstack_base (&output)); | |
2342 | do_cleanups (inner_cleanup); | |
2343 | } | |
2344 | ||
2345 | /* Subroutine of ui_printf to simplify it. | |
2346 | Print VALUE, a decimal floating point value, to STREAM using FORMAT. */ | |
2347 | ||
2348 | static void | |
2349 | printf_decfloat (struct ui_file *stream, const char *format, | |
2350 | struct value *value) | |
2351 | { | |
2352 | const gdb_byte *param_ptr = value_contents (value); | |
2353 | ||
2354 | #if defined (PRINTF_HAS_DECFLOAT) | |
2355 | /* If we have native support for Decimal floating | |
2356 | printing, handle it here. */ | |
2357 | fprintf_filtered (stream, format, param_ptr); | |
2358 | #else | |
2359 | /* As a workaround until vasprintf has native support for DFP | |
2360 | we convert the DFP values to string and print them using | |
2361 | the %s format specifier. */ | |
2362 | const char *p; | |
2363 | ||
2364 | /* Parameter data. */ | |
2365 | struct type *param_type = value_type (value); | |
2366 | struct gdbarch *gdbarch = get_type_arch (param_type); | |
2367 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); | |
2368 | ||
2369 | /* DFP output data. */ | |
2370 | struct value *dfp_value = NULL; | |
2371 | gdb_byte *dfp_ptr; | |
2372 | int dfp_len = 16; | |
2373 | gdb_byte dec[16]; | |
2374 | struct type *dfp_type = NULL; | |
2375 | char decstr[MAX_DECIMAL_STRING]; | |
2376 | ||
2377 | /* Points to the end of the string so that we can go back | |
2378 | and check for DFP length modifiers. */ | |
2379 | p = format + strlen (format); | |
2380 | ||
2381 | /* Look for the float/double format specifier. */ | |
2382 | while (*p != 'f' && *p != 'e' && *p != 'E' | |
2383 | && *p != 'g' && *p != 'G') | |
2384 | p--; | |
2385 | ||
2386 | /* Search for the '%' char and extract the size and type of | |
2387 | the output decimal value based on its modifiers | |
2388 | (%Hf, %Df, %DDf). */ | |
2389 | while (*--p != '%') | |
2390 | { | |
2391 | if (*p == 'H') | |
2392 | { | |
2393 | dfp_len = 4; | |
2394 | dfp_type = builtin_type (gdbarch)->builtin_decfloat; | |
2395 | } | |
2396 | else if (*p == 'D' && *(p - 1) == 'D') | |
2397 | { | |
2398 | dfp_len = 16; | |
2399 | dfp_type = builtin_type (gdbarch)->builtin_declong; | |
2400 | p--; | |
2401 | } | |
2402 | else | |
2403 | { | |
2404 | dfp_len = 8; | |
2405 | dfp_type = builtin_type (gdbarch)->builtin_decdouble; | |
2406 | } | |
2407 | } | |
2408 | ||
2409 | /* Conversion between different DFP types. */ | |
2410 | if (TYPE_CODE (param_type) == TYPE_CODE_DECFLOAT) | |
2411 | decimal_convert (param_ptr, TYPE_LENGTH (param_type), | |
2412 | byte_order, dec, dfp_len, byte_order); | |
2413 | else | |
2414 | /* If this is a non-trivial conversion, just output 0. | |
2415 | A correct converted value can be displayed by explicitly | |
2416 | casting to a DFP type. */ | |
2417 | decimal_from_string (dec, dfp_len, byte_order, "0"); | |
2418 | ||
2419 | dfp_value = value_from_decfloat (dfp_type, dec); | |
2420 | ||
2421 | dfp_ptr = (gdb_byte *) value_contents (dfp_value); | |
2422 | ||
2423 | decimal_to_string (dfp_ptr, dfp_len, byte_order, decstr); | |
2424 | ||
2425 | /* Print the DFP value. */ | |
2426 | fprintf_filtered (stream, "%s", decstr); | |
2427 | #endif | |
2428 | } | |
2429 | ||
2430 | /* Subroutine of ui_printf to simplify it. | |
2431 | Print VALUE, a target pointer, to STREAM using FORMAT. */ | |
2432 | ||
2433 | static void | |
2434 | printf_pointer (struct ui_file *stream, const char *format, | |
2435 | struct value *value) | |
2436 | { | |
2437 | /* We avoid the host's %p because pointers are too | |
2438 | likely to be the wrong size. The only interesting | |
2439 | modifier for %p is a width; extract that, and then | |
2440 | handle %p as glibc would: %#x or a literal "(nil)". */ | |
2441 | ||
2442 | const char *p; | |
2443 | char *fmt, *fmt_p; | |
2444 | #ifdef PRINTF_HAS_LONG_LONG | |
2445 | long long val = value_as_long (value); | |
2446 | #else | |
2447 | long val = value_as_long (value); | |
2448 | #endif | |
2449 | ||
2450 | fmt = (char *) alloca (strlen (format) + 5); | |
2451 | ||
2452 | /* Copy up to the leading %. */ | |
2453 | p = format; | |
2454 | fmt_p = fmt; | |
2455 | while (*p) | |
2456 | { | |
2457 | int is_percent = (*p == '%'); | |
2458 | ||
2459 | *fmt_p++ = *p++; | |
2460 | if (is_percent) | |
2461 | { | |
2462 | if (*p == '%') | |
2463 | *fmt_p++ = *p++; | |
2464 | else | |
2465 | break; | |
2466 | } | |
2467 | } | |
2468 | ||
2469 | if (val != 0) | |
2470 | *fmt_p++ = '#'; | |
2471 | ||
2472 | /* Copy any width. */ | |
2473 | while (*p >= '0' && *p < '9') | |
2474 | *fmt_p++ = *p++; | |
2475 | ||
2476 | gdb_assert (*p == 'p' && *(p + 1) == '\0'); | |
2477 | if (val != 0) | |
2478 | { | |
2479 | #ifdef PRINTF_HAS_LONG_LONG | |
2480 | *fmt_p++ = 'l'; | |
2481 | #endif | |
2482 | *fmt_p++ = 'l'; | |
2483 | *fmt_p++ = 'x'; | |
2484 | *fmt_p++ = '\0'; | |
2485 | fprintf_filtered (stream, fmt, val); | |
2486 | } | |
2487 | else | |
2488 | { | |
2489 | *fmt_p++ = 's'; | |
2490 | *fmt_p++ = '\0'; | |
2491 | fprintf_filtered (stream, fmt, "(nil)"); | |
2492 | } | |
2493 | } | |
2494 | ||
2495 | /* printf "printf format string" ARG to STREAM. */ | |
2496 | ||
2497 | static void | |
2498 | ui_printf (const char *arg, struct ui_file *stream) | |
2499 | { | |
2500 | struct format_piece *fpieces; | |
2501 | const char *s = arg; | |
2502 | struct value **val_args; | |
2503 | int allocated_args = 20; | |
2504 | struct cleanup *old_cleanups; | |
2505 | ||
2506 | val_args = XNEWVEC (struct value *, allocated_args); | |
2507 | old_cleanups = make_cleanup (free_current_contents, &val_args); | |
2508 | ||
2509 | if (s == 0) | |
2510 | error_no_arg (_("format-control string and values to print")); | |
2511 | ||
2512 | s = skip_spaces_const (s); | |
2513 | ||
2514 | /* A format string should follow, enveloped in double quotes. */ | |
2515 | if (*s++ != '"') | |
2516 | error (_("Bad format string, missing '\"'.")); | |
2517 | ||
2518 | fpieces = parse_format_string (&s); | |
2519 | ||
2520 | make_cleanup (free_format_pieces_cleanup, &fpieces); | |
2521 | ||
2522 | if (*s++ != '"') | |
2523 | error (_("Bad format string, non-terminated '\"'.")); | |
2524 | ||
2525 | s = skip_spaces_const (s); | |
2526 | ||
2527 | if (*s != ',' && *s != 0) | |
2528 | error (_("Invalid argument syntax")); | |
2529 | ||
2530 | if (*s == ',') | |
2531 | s++; | |
2532 | s = skip_spaces_const (s); | |
2533 | ||
2534 | { | |
2535 | int nargs = 0; | |
2536 | int nargs_wanted; | |
2537 | int i, fr; | |
2538 | char *current_substring; | |
2539 | ||
2540 | nargs_wanted = 0; | |
2541 | for (fr = 0; fpieces[fr].string != NULL; fr++) | |
2542 | if (fpieces[fr].argclass != literal_piece) | |
2543 | ++nargs_wanted; | |
2544 | ||
2545 | /* Now, parse all arguments and evaluate them. | |
2546 | Store the VALUEs in VAL_ARGS. */ | |
2547 | ||
2548 | while (*s != '\0') | |
2549 | { | |
2550 | const char *s1; | |
2551 | ||
2552 | if (nargs == allocated_args) | |
2553 | val_args = (struct value **) xrealloc ((char *) val_args, | |
2554 | (allocated_args *= 2) | |
2555 | * sizeof (struct value *)); | |
2556 | s1 = s; | |
2557 | val_args[nargs] = parse_to_comma_and_eval (&s1); | |
2558 | ||
2559 | nargs++; | |
2560 | s = s1; | |
2561 | if (*s == ',') | |
2562 | s++; | |
2563 | } | |
2564 | ||
2565 | if (nargs != nargs_wanted) | |
2566 | error (_("Wrong number of arguments for specified format-string")); | |
2567 | ||
2568 | /* Now actually print them. */ | |
2569 | i = 0; | |
2570 | for (fr = 0; fpieces[fr].string != NULL; fr++) | |
2571 | { | |
2572 | current_substring = fpieces[fr].string; | |
2573 | switch (fpieces[fr].argclass) | |
2574 | { | |
2575 | case string_arg: | |
2576 | printf_c_string (stream, current_substring, val_args[i]); | |
2577 | break; | |
2578 | case wide_string_arg: | |
2579 | printf_wide_c_string (stream, current_substring, val_args[i]); | |
2580 | break; | |
2581 | case wide_char_arg: | |
2582 | { | |
2583 | struct gdbarch *gdbarch | |
2584 | = get_type_arch (value_type (val_args[i])); | |
2585 | struct type *wctype = lookup_typename (current_language, gdbarch, | |
2586 | "wchar_t", NULL, 0); | |
2587 | struct type *valtype; | |
2588 | struct obstack output; | |
2589 | struct cleanup *inner_cleanup; | |
2590 | const gdb_byte *bytes; | |
2591 | ||
2592 | valtype = value_type (val_args[i]); | |
2593 | if (TYPE_LENGTH (valtype) != TYPE_LENGTH (wctype) | |
2594 | || TYPE_CODE (valtype) != TYPE_CODE_INT) | |
2595 | error (_("expected wchar_t argument for %%lc")); | |
2596 | ||
2597 | bytes = value_contents (val_args[i]); | |
2598 | ||
2599 | obstack_init (&output); | |
2600 | inner_cleanup = make_cleanup_obstack_free (&output); | |
2601 | ||
2602 | convert_between_encodings (target_wide_charset (gdbarch), | |
2603 | host_charset (), | |
2604 | bytes, TYPE_LENGTH (valtype), | |
2605 | TYPE_LENGTH (valtype), | |
2606 | &output, translit_char); | |
2607 | obstack_grow_str0 (&output, ""); | |
2608 | ||
2609 | fprintf_filtered (stream, current_substring, | |
2610 | obstack_base (&output)); | |
2611 | do_cleanups (inner_cleanup); | |
2612 | } | |
2613 | break; | |
2614 | case double_arg: | |
2615 | { | |
2616 | struct type *type = value_type (val_args[i]); | |
2617 | DOUBLEST val; | |
2618 | int inv; | |
2619 | ||
2620 | /* If format string wants a float, unchecked-convert the value | |
2621 | to floating point of the same size. */ | |
2622 | type = float_type_from_length (type); | |
2623 | val = unpack_double (type, value_contents (val_args[i]), &inv); | |
2624 | if (inv) | |
2625 | error (_("Invalid floating value found in program.")); | |
2626 | ||
2627 | fprintf_filtered (stream, current_substring, (double) val); | |
2628 | break; | |
2629 | } | |
2630 | case long_double_arg: | |
2631 | #ifdef HAVE_LONG_DOUBLE | |
2632 | { | |
2633 | struct type *type = value_type (val_args[i]); | |
2634 | DOUBLEST val; | |
2635 | int inv; | |
2636 | ||
2637 | /* If format string wants a float, unchecked-convert the value | |
2638 | to floating point of the same size. */ | |
2639 | type = float_type_from_length (type); | |
2640 | val = unpack_double (type, value_contents (val_args[i]), &inv); | |
2641 | if (inv) | |
2642 | error (_("Invalid floating value found in program.")); | |
2643 | ||
2644 | fprintf_filtered (stream, current_substring, | |
2645 | (long double) val); | |
2646 | break; | |
2647 | } | |
2648 | #else | |
2649 | error (_("long double not supported in printf")); | |
2650 | #endif | |
2651 | case long_long_arg: | |
2652 | #ifdef PRINTF_HAS_LONG_LONG | |
2653 | { | |
2654 | long long val = value_as_long (val_args[i]); | |
2655 | ||
2656 | fprintf_filtered (stream, current_substring, val); | |
2657 | break; | |
2658 | } | |
2659 | #else | |
2660 | error (_("long long not supported in printf")); | |
2661 | #endif | |
2662 | case int_arg: | |
2663 | { | |
2664 | int val = value_as_long (val_args[i]); | |
2665 | ||
2666 | fprintf_filtered (stream, current_substring, val); | |
2667 | break; | |
2668 | } | |
2669 | case long_arg: | |
2670 | { | |
2671 | long val = value_as_long (val_args[i]); | |
2672 | ||
2673 | fprintf_filtered (stream, current_substring, val); | |
2674 | break; | |
2675 | } | |
2676 | /* Handles decimal floating values. */ | |
2677 | case decfloat_arg: | |
2678 | printf_decfloat (stream, current_substring, val_args[i]); | |
2679 | break; | |
2680 | case ptr_arg: | |
2681 | printf_pointer (stream, current_substring, val_args[i]); | |
2682 | break; | |
2683 | case literal_piece: | |
2684 | /* Print a portion of the format string that has no | |
2685 | directives. Note that this will not include any | |
2686 | ordinary %-specs, but it might include "%%". That is | |
2687 | why we use printf_filtered and not puts_filtered here. | |
2688 | Also, we pass a dummy argument because some platforms | |
2689 | have modified GCC to include -Wformat-security by | |
2690 | default, which will warn here if there is no | |
2691 | argument. */ | |
2692 | fprintf_filtered (stream, current_substring, 0); | |
2693 | break; | |
2694 | default: | |
2695 | internal_error (__FILE__, __LINE__, | |
2696 | _("failed internal consistency check")); | |
2697 | } | |
2698 | /* Maybe advance to the next argument. */ | |
2699 | if (fpieces[fr].argclass != literal_piece) | |
2700 | ++i; | |
2701 | } | |
2702 | } | |
2703 | do_cleanups (old_cleanups); | |
2704 | } | |
2705 | ||
2706 | /* Implement the "printf" command. */ | |
2707 | ||
2708 | static void | |
2709 | printf_command (char *arg, int from_tty) | |
2710 | { | |
2711 | ui_printf (arg, gdb_stdout); | |
2712 | gdb_flush (gdb_stdout); | |
2713 | } | |
2714 | ||
2715 | /* Implement the "eval" command. */ | |
2716 | ||
2717 | static void | |
2718 | eval_command (char *arg, int from_tty) | |
2719 | { | |
2720 | string_file stb; | |
2721 | ||
2722 | ui_printf (arg, &stb); | |
2723 | ||
2724 | std::string expanded = insert_user_defined_cmd_args (stb.c_str ()); | |
2725 | ||
2726 | execute_command (&expanded[0], from_tty); | |
2727 | } | |
2728 | ||
2729 | void | |
2730 | _initialize_printcmd (void) | |
2731 | { | |
2732 | struct cmd_list_element *c; | |
2733 | ||
2734 | current_display_number = -1; | |
2735 | ||
2736 | observer_attach_free_objfile (clear_dangling_display_expressions); | |
2737 | ||
2738 | add_info ("address", address_info, | |
2739 | _("Describe where symbol SYM is stored.")); | |
2740 | ||
2741 | add_info ("symbol", sym_info, _("\ | |
2742 | Describe what symbol is at location ADDR.\n\ | |
2743 | Only for symbols with fixed locations (global or static scope).")); | |
2744 | ||
2745 | add_com ("x", class_vars, x_command, _("\ | |
2746 | Examine memory: x/FMT ADDRESS.\n\ | |
2747 | ADDRESS is an expression for the memory address to examine.\n\ | |
2748 | FMT is a repeat count followed by a format letter and a size letter.\n\ | |
2749 | Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\ | |
2750 | t(binary), f(float), a(address), i(instruction), c(char), s(string)\n\ | |
2751 | and z(hex, zero padded on the left).\n\ | |
2752 | Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\ | |
2753 | The specified number of objects of the specified size are printed\n\ | |
2754 | according to the format. If a negative number is specified, memory is\n\ | |
2755 | examined backward from the address.\n\n\ | |
2756 | Defaults for format and size letters are those previously used.\n\ | |
2757 | Default count is 1. Default address is following last thing printed\n\ | |
2758 | with this command or \"print\".")); | |
2759 | ||
2760 | #if 0 | |
2761 | add_com ("whereis", class_vars, whereis_command, | |
2762 | _("Print line number and file of definition of variable.")); | |
2763 | #endif | |
2764 | ||
2765 | add_info ("display", display_info, _("\ | |
2766 | Expressions to display when program stops, with code numbers.")); | |
2767 | ||
2768 | add_cmd ("undisplay", class_vars, undisplay_command, _("\ | |
2769 | Cancel some expressions to be displayed when program stops.\n\ | |
2770 | Arguments are the code numbers of the expressions to stop displaying.\n\ | |
2771 | No argument means cancel all automatic-display expressions.\n\ | |
2772 | \"delete display\" has the same effect as this command.\n\ | |
2773 | Do \"info display\" to see current list of code numbers."), | |
2774 | &cmdlist); | |
2775 | ||
2776 | add_com ("display", class_vars, display_command, _("\ | |
2777 | Print value of expression EXP each time the program stops.\n\ | |
2778 | /FMT may be used before EXP as in the \"print\" command.\n\ | |
2779 | /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\ | |
2780 | as in the \"x\" command, and then EXP is used to get the address to examine\n\ | |
2781 | and examining is done as in the \"x\" command.\n\n\ | |
2782 | With no argument, display all currently requested auto-display expressions.\n\ | |
2783 | Use \"undisplay\" to cancel display requests previously made.")); | |
2784 | ||
2785 | add_cmd ("display", class_vars, enable_display_command, _("\ | |
2786 | Enable some expressions to be displayed when program stops.\n\ | |
2787 | Arguments are the code numbers of the expressions to resume displaying.\n\ | |
2788 | No argument means enable all automatic-display expressions.\n\ | |
2789 | Do \"info display\" to see current list of code numbers."), &enablelist); | |
2790 | ||
2791 | add_cmd ("display", class_vars, disable_display_command, _("\ | |
2792 | Disable some expressions to be displayed when program stops.\n\ | |
2793 | Arguments are the code numbers of the expressions to stop displaying.\n\ | |
2794 | No argument means disable all automatic-display expressions.\n\ | |
2795 | Do \"info display\" to see current list of code numbers."), &disablelist); | |
2796 | ||
2797 | add_cmd ("display", class_vars, undisplay_command, _("\ | |
2798 | Cancel some expressions to be displayed when program stops.\n\ | |
2799 | Arguments are the code numbers of the expressions to stop displaying.\n\ | |
2800 | No argument means cancel all automatic-display expressions.\n\ | |
2801 | Do \"info display\" to see current list of code numbers."), &deletelist); | |
2802 | ||
2803 | add_com ("printf", class_vars, printf_command, _("\ | |
2804 | printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\ | |
2805 | This is useful for formatted output in user-defined commands.")); | |
2806 | ||
2807 | add_com ("output", class_vars, output_command, _("\ | |
2808 | Like \"print\" but don't put in value history and don't print newline.\n\ | |
2809 | This is useful in user-defined commands.")); | |
2810 | ||
2811 | add_prefix_cmd ("set", class_vars, set_command, _("\ | |
2812 | Evaluate expression EXP and assign result to variable VAR, using assignment\n\ | |
2813 | syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ | |
2814 | example). VAR may be a debugger \"convenience\" variable (names starting\n\ | |
2815 | with $), a register (a few standard names starting with $), or an actual\n\ | |
2816 | variable in the program being debugged. EXP is any valid expression.\n\ | |
2817 | Use \"set variable\" for variables with names identical to set subcommands.\n\ | |
2818 | \n\ | |
2819 | With a subcommand, this command modifies parts of the gdb environment.\n\ | |
2820 | You can see these environment settings with the \"show\" command."), | |
2821 | &setlist, "set ", 1, &cmdlist); | |
2822 | if (dbx_commands) | |
2823 | add_com ("assign", class_vars, set_command, _("\ | |
2824 | Evaluate expression EXP and assign result to variable VAR, using assignment\n\ | |
2825 | syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ | |
2826 | example). VAR may be a debugger \"convenience\" variable (names starting\n\ | |
2827 | with $), a register (a few standard names starting with $), or an actual\n\ | |
2828 | variable in the program being debugged. EXP is any valid expression.\n\ | |
2829 | Use \"set variable\" for variables with names identical to set subcommands.\n\ | |
2830 | \nWith a subcommand, this command modifies parts of the gdb environment.\n\ | |
2831 | You can see these environment settings with the \"show\" command.")); | |
2832 | ||
2833 | /* "call" is the same as "set", but handy for dbx users to call fns. */ | |
2834 | c = add_com ("call", class_vars, call_command, _("\ | |
2835 | Call a function in the program.\n\ | |
2836 | The argument is the function name and arguments, in the notation of the\n\ | |
2837 | current working language. The result is printed and saved in the value\n\ | |
2838 | history, if it is not void.")); | |
2839 | set_cmd_completer (c, expression_completer); | |
2840 | ||
2841 | add_cmd ("variable", class_vars, set_command, _("\ | |
2842 | Evaluate expression EXP and assign result to variable VAR, using assignment\n\ | |
2843 | syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ | |
2844 | example). VAR may be a debugger \"convenience\" variable (names starting\n\ | |
2845 | with $), a register (a few standard names starting with $), or an actual\n\ | |
2846 | variable in the program being debugged. EXP is any valid expression.\n\ | |
2847 | This may usually be abbreviated to simply \"set\"."), | |
2848 | &setlist); | |
2849 | ||
2850 | c = add_com ("print", class_vars, print_command, _("\ | |
2851 | Print value of expression EXP.\n\ | |
2852 | Variables accessible are those of the lexical environment of the selected\n\ | |
2853 | stack frame, plus all those whose scope is global or an entire file.\n\ | |
2854 | \n\ | |
2855 | $NUM gets previous value number NUM. $ and $$ are the last two values.\n\ | |
2856 | $$NUM refers to NUM'th value back from the last one.\n\ | |
2857 | Names starting with $ refer to registers (with the values they would have\n\ | |
2858 | if the program were to return to the stack frame now selected, restoring\n\ | |
2859 | all registers saved by frames farther in) or else to debugger\n\ | |
2860 | \"convenience\" variables (any such name not a known register).\n\ | |
2861 | Use assignment expressions to give values to convenience variables.\n\ | |
2862 | \n\ | |
2863 | {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\ | |
2864 | @ is a binary operator for treating consecutive data objects\n\ | |
2865 | anywhere in memory as an array. FOO@NUM gives an array whose first\n\ | |
2866 | element is FOO, whose second element is stored in the space following\n\ | |
2867 | where FOO is stored, etc. FOO must be an expression whose value\n\ | |
2868 | resides in memory.\n\ | |
2869 | \n\ | |
2870 | EXP may be preceded with /FMT, where FMT is a format letter\n\ | |
2871 | but no count or size letter (see \"x\" command).")); | |
2872 | set_cmd_completer (c, expression_completer); | |
2873 | add_com_alias ("p", "print", class_vars, 1); | |
2874 | add_com_alias ("inspect", "print", class_vars, 1); | |
2875 | ||
2876 | add_setshow_uinteger_cmd ("max-symbolic-offset", no_class, | |
2877 | &max_symbolic_offset, _("\ | |
2878 | Set the largest offset that will be printed in <symbol+1234> form."), _("\ | |
2879 | Show the largest offset that will be printed in <symbol+1234> form."), _("\ | |
2880 | Tell GDB to only display the symbolic form of an address if the\n\ | |
2881 | offset between the closest earlier symbol and the address is less than\n\ | |
2882 | the specified maximum offset. The default is \"unlimited\", which tells GDB\n\ | |
2883 | to always print the symbolic form of an address if any symbol precedes\n\ | |
2884 | it. Zero is equivalent to \"unlimited\"."), | |
2885 | NULL, | |
2886 | show_max_symbolic_offset, | |
2887 | &setprintlist, &showprintlist); | |
2888 | add_setshow_boolean_cmd ("symbol-filename", no_class, | |
2889 | &print_symbol_filename, _("\ | |
2890 | Set printing of source filename and line number with <symbol>."), _("\ | |
2891 | Show printing of source filename and line number with <symbol>."), NULL, | |
2892 | NULL, | |
2893 | show_print_symbol_filename, | |
2894 | &setprintlist, &showprintlist); | |
2895 | ||
2896 | add_com ("eval", no_class, eval_command, _("\ | |
2897 | Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\ | |
2898 | a command line, and call it.")); | |
2899 | } |