1 /* Print values for GNU debugger GDB. 2 3 Copyright (C) 1986-2012 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 "gdb_string.h" 22 #include "frame.h" 23 #include "symtab.h" 24 #include "gdbtypes.h" 25 #include "value.h" 26 #include "language.h" 27 #include "expression.h" 28 #include "gdbcore.h" 29 #include "gdbcmd.h" 30 #include "target.h" 31 #include "breakpoint.h" 32 #include "demangle.h" 33 #include "gdb-demangle.h" 34 #include "valprint.h" 35 #include "annotate.h" 36 #include "symfile.h" /* for overlay functions */ 37 #include "objfiles.h" /* ditto */ 38 #include "completer.h" /* for completion functions */ 39 #include "ui-out.h" 40 #include "gdb_assert.h" 41 #include "block.h" 42 #include "disasm.h" 43 #include "dfp.h" 44 #include "valprint.h" 45 #include "exceptions.h" 46 #include "observer.h" 47 #include "solist.h" 48 #include "parser-defs.h" 49 #include "charset.h" 50 #include "arch-utils.h" 51 #include "cli/cli-utils.h" 52 53 #ifdef TUI 54 #include "tui/tui.h" /* For tui_active et al. */ 55 #endif 56 57 #if defined(__MINGW32__) && !defined(PRINTF_HAS_LONG_LONG) 58 # define USE_PRINTF_I64 1 59 # define PRINTF_HAS_LONG_LONG 60 #else 61 # define USE_PRINTF_I64 0 62 #endif 63 64 struct format_data 65 { 66 int count; 67 char format; 68 char size; 69 70 /* True if the value should be printed raw -- that is, bypassing 71 python-based formatters. */ 72 unsigned char raw; 73 }; 74 75 /* Last specified output format. */ 76 77 static char last_format = 0; 78 79 /* Last specified examination size. 'b', 'h', 'w' or `q'. */ 80 81 static char last_size = 'w'; 82 83 /* Default address to examine next, and associated architecture. */ 84 85 static struct gdbarch *next_gdbarch; 86 static CORE_ADDR next_address; 87 88 /* Number of delay instructions following current disassembled insn. */ 89 90 static int branch_delay_insns; 91 92 /* Last address examined. */ 93 94 static CORE_ADDR last_examine_address; 95 96 /* Contents of last address examined. 97 This is not valid past the end of the `x' command! */ 98 99 static struct value *last_examine_value; 100 101 /* Largest offset between a symbolic value and an address, that will be 102 printed as `0x1234 <symbol+offset>'. */ 103 104 static unsigned int max_symbolic_offset = UINT_MAX; 105 static void 106 show_max_symbolic_offset (struct ui_file *file, int from_tty, 107 struct cmd_list_element *c, const char *value) 108 { 109 fprintf_filtered (file, 110 _("The largest offset that will be " 111 "printed in <symbol+1234> form is %s.\n"), 112 value); 113 } 114 115 /* Append the source filename and linenumber of the symbol when 116 printing a symbolic value as `<symbol at filename:linenum>' if set. */ 117 static int print_symbol_filename = 0; 118 static void 119 show_print_symbol_filename (struct ui_file *file, int from_tty, 120 struct cmd_list_element *c, const char *value) 121 { 122 fprintf_filtered (file, _("Printing of source filename and " 123 "line number with <symbol> is %s.\n"), 124 value); 125 } 126 127 /* Number of auto-display expression currently being displayed. 128 So that we can disable it if we get a signal within it. 129 -1 when not doing one. */ 130 131 int current_display_number; 132 133 struct display 134 { 135 /* Chain link to next auto-display item. */ 136 struct display *next; 137 138 /* The expression as the user typed it. */ 139 char *exp_string; 140 141 /* Expression to be evaluated and displayed. */ 142 struct expression *exp; 143 144 /* Item number of this auto-display item. */ 145 int number; 146 147 /* Display format specified. */ 148 struct format_data format; 149 150 /* Program space associated with `block'. */ 151 struct program_space *pspace; 152 153 /* Innermost block required by this expression when evaluated. */ 154 struct block *block; 155 156 /* Status of this display (enabled or disabled). */ 157 int enabled_p; 158 }; 159 160 /* Chain of expressions whose values should be displayed 161 automatically each time the program stops. */ 162 163 static struct display *display_chain; 164 165 static int display_number; 166 167 /* Walk the following statement or block through all displays. 168 ALL_DISPLAYS_SAFE does so even if the statement deletes the current 169 display. */ 170 171 #define ALL_DISPLAYS(B) \ 172 for (B = display_chain; B; B = B->next) 173 174 #define ALL_DISPLAYS_SAFE(B,TMP) \ 175 for (B = display_chain; \ 176 B ? (TMP = B->next, 1): 0; \ 177 B = TMP) 178 179 /* Prototypes for exported functions. */ 180 181 void output_command (char *, int); 182 183 void _initialize_printcmd (void); 184 185 /* Prototypes for local functions. */ 186 187 static void do_one_display (struct display *); 188 189 190 /* Decode a format specification. *STRING_PTR should point to it. 191 OFORMAT and OSIZE are used as defaults for the format and size 192 if none are given in the format specification. 193 If OSIZE is zero, then the size field of the returned value 194 should be set only if a size is explicitly specified by the 195 user. 196 The structure returned describes all the data 197 found in the specification. In addition, *STRING_PTR is advanced 198 past the specification and past all whitespace following it. */ 199 200 static struct format_data 201 decode_format (char **string_ptr, int oformat, int osize) 202 { 203 struct format_data val; 204 char *p = *string_ptr; 205 206 val.format = '?'; 207 val.size = '?'; 208 val.count = 1; 209 val.raw = 0; 210 211 if (*p >= '0' && *p <= '9') 212 val.count = atoi (p); 213 while (*p >= '0' && *p <= '9') 214 p++; 215 216 /* Now process size or format letters that follow. */ 217 218 while (1) 219 { 220 if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g') 221 val.size = *p++; 222 else if (*p == 'r') 223 { 224 val.raw = 1; 225 p++; 226 } 227 else if (*p >= 'a' && *p <= 'z') 228 val.format = *p++; 229 else 230 break; 231 } 232 233 while (*p == ' ' || *p == '\t') 234 p++; 235 *string_ptr = p; 236 237 /* Set defaults for format and size if not specified. */ 238 if (val.format == '?') 239 { 240 if (val.size == '?') 241 { 242 /* Neither has been specified. */ 243 val.format = oformat; 244 val.size = osize; 245 } 246 else 247 /* If a size is specified, any format makes a reasonable 248 default except 'i'. */ 249 val.format = oformat == 'i' ? 'x' : oformat; 250 } 251 else if (val.size == '?') 252 switch (val.format) 253 { 254 case 'a': 255 /* Pick the appropriate size for an address. This is deferred 256 until do_examine when we know the actual architecture to use. 257 A special size value of 'a' is used to indicate this case. */ 258 val.size = osize ? 'a' : osize; 259 break; 260 case 'f': 261 /* Floating point has to be word or giantword. */ 262 if (osize == 'w' || osize == 'g') 263 val.size = osize; 264 else 265 /* Default it to giantword if the last used size is not 266 appropriate. */ 267 val.size = osize ? 'g' : osize; 268 break; 269 case 'c': 270 /* Characters default to one byte. */ 271 val.size = osize ? 'b' : osize; 272 break; 273 case 's': 274 /* Display strings with byte size chars unless explicitly 275 specified. */ 276 val.size = '\0'; 277 break; 278 279 default: 280 /* The default is the size most recently specified. */ 281 val.size = osize; 282 } 283 284 return val; 285 } 286 287 /* Print value VAL on stream according to OPTIONS. 288 Do not end with a newline. 289 SIZE is the letter for the size of datum being printed. 290 This is used to pad hex numbers so they line up. SIZE is 0 291 for print / output and set for examine. */ 292 293 static void 294 print_formatted (struct value *val, int size, 295 const struct value_print_options *options, 296 struct ui_file *stream) 297 { 298 struct type *type = check_typedef (value_type (val)); 299 int len = TYPE_LENGTH (type); 300 301 if (VALUE_LVAL (val) == lval_memory) 302 next_address = value_address (val) + len; 303 304 if (size) 305 { 306 switch (options->format) 307 { 308 case 's': 309 { 310 struct type *elttype = value_type (val); 311 312 next_address = (value_address (val) 313 + val_print_string (elttype, NULL, 314 value_address (val), -1, 315 stream, options) * len); 316 } 317 return; 318 319 case 'i': 320 /* We often wrap here if there are long symbolic names. */ 321 wrap_here (" "); 322 next_address = (value_address (val) 323 + gdb_print_insn (get_type_arch (type), 324 value_address (val), stream, 325 &branch_delay_insns)); 326 return; 327 } 328 } 329 330 if (options->format == 0 || options->format == 's' 331 || TYPE_CODE (type) == TYPE_CODE_REF 332 || TYPE_CODE (type) == TYPE_CODE_ARRAY 333 || TYPE_CODE (type) == TYPE_CODE_STRING 334 || TYPE_CODE (type) == TYPE_CODE_STRUCT 335 || TYPE_CODE (type) == TYPE_CODE_UNION 336 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE) 337 value_print (val, stream, options); 338 else 339 /* User specified format, so don't look to the type to tell us 340 what to do. */ 341 val_print_scalar_formatted (type, 342 value_contents_for_printing (val), 343 value_embedded_offset (val), 344 val, 345 options, size, stream); 346 } 347 348 /* Return builtin floating point type of same length as TYPE. 349 If no such type is found, return TYPE itself. */ 350 static struct type * 351 float_type_from_length (struct type *type) 352 { 353 struct gdbarch *gdbarch = get_type_arch (type); 354 const struct builtin_type *builtin = builtin_type (gdbarch); 355 unsigned int len = TYPE_LENGTH (type); 356 357 if (len == TYPE_LENGTH (builtin->builtin_float)) 358 type = builtin->builtin_float; 359 else if (len == TYPE_LENGTH (builtin->builtin_double)) 360 type = builtin->builtin_double; 361 else if (len == TYPE_LENGTH (builtin->builtin_long_double)) 362 type = builtin->builtin_long_double; 363 364 return type; 365 } 366 367 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR, 368 according to OPTIONS and SIZE on STREAM. Formats s and i are not 369 supported at this level. */ 370 371 void 372 print_scalar_formatted (const void *valaddr, struct type *type, 373 const struct value_print_options *options, 374 int size, struct ui_file *stream) 375 { 376 struct gdbarch *gdbarch = get_type_arch (type); 377 LONGEST val_long = 0; 378 unsigned int len = TYPE_LENGTH (type); 379 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); 380 381 /* String printing should go through val_print_scalar_formatted. */ 382 gdb_assert (options->format != 's'); 383 384 if (len > sizeof(LONGEST) && 385 (TYPE_CODE (type) == TYPE_CODE_INT 386 || TYPE_CODE (type) == TYPE_CODE_ENUM)) 387 { 388 switch (options->format) 389 { 390 case 'o': 391 print_octal_chars (stream, valaddr, len, byte_order); 392 return; 393 case 'u': 394 case 'd': 395 print_decimal_chars (stream, valaddr, len, byte_order); 396 return; 397 case 't': 398 print_binary_chars (stream, valaddr, len, byte_order); 399 return; 400 case 'x': 401 print_hex_chars (stream, valaddr, len, byte_order); 402 return; 403 case 'c': 404 print_char_chars (stream, type, valaddr, len, byte_order); 405 return; 406 default: 407 break; 408 }; 409 } 410 411 if (options->format != 'f') 412 val_long = unpack_long (type, valaddr); 413 414 /* If the value is a pointer, and pointers and addresses are not the 415 same, then at this point, the value's length (in target bytes) is 416 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */ 417 if (TYPE_CODE (type) == TYPE_CODE_PTR) 418 len = gdbarch_addr_bit (gdbarch) / TARGET_CHAR_BIT; 419 420 /* If we are printing it as unsigned, truncate it in case it is actually 421 a negative signed value (e.g. "print/u (short)-1" should print 65535 422 (if shorts are 16 bits) instead of 4294967295). */ 423 if (options->format != 'd' || TYPE_UNSIGNED (type)) 424 { 425 if (len < sizeof (LONGEST)) 426 val_long &= ((LONGEST) 1 << HOST_CHAR_BIT * len) - 1; 427 } 428 429 switch (options->format) 430 { 431 case 'x': 432 if (!size) 433 { 434 /* No size specified, like in print. Print varying # of digits. */ 435 print_longest (stream, 'x', 1, val_long); 436 } 437 else 438 switch (size) 439 { 440 case 'b': 441 case 'h': 442 case 'w': 443 case 'g': 444 print_longest (stream, size, 1, val_long); 445 break; 446 default: 447 error (_("Undefined output size \"%c\"."), size); 448 } 449 break; 450 451 case 'd': 452 print_longest (stream, 'd', 1, val_long); 453 break; 454 455 case 'u': 456 print_longest (stream, 'u', 0, val_long); 457 break; 458 459 case 'o': 460 if (val_long) 461 print_longest (stream, 'o', 1, val_long); 462 else 463 fprintf_filtered (stream, "0"); 464 break; 465 466 case 'a': 467 { 468 CORE_ADDR addr = unpack_pointer (type, valaddr); 469 470 print_address (gdbarch, addr, stream); 471 } 472 break; 473 474 case 'c': 475 { 476 struct value_print_options opts = *options; 477 478 opts.format = 0; 479 if (TYPE_UNSIGNED (type)) 480 type = builtin_type (gdbarch)->builtin_true_unsigned_char; 481 else 482 type = builtin_type (gdbarch)->builtin_true_char; 483 484 value_print (value_from_longest (type, val_long), stream, &opts); 485 } 486 break; 487 488 case 'f': 489 type = float_type_from_length (type); 490 print_floating (valaddr, type, stream); 491 break; 492 493 case 0: 494 internal_error (__FILE__, __LINE__, 495 _("failed internal consistency check")); 496 497 case 't': 498 /* Binary; 't' stands for "two". */ 499 { 500 char bits[8 * (sizeof val_long) + 1]; 501 char buf[8 * (sizeof val_long) + 32]; 502 char *cp = bits; 503 int width; 504 505 if (!size) 506 width = 8 * (sizeof val_long); 507 else 508 switch (size) 509 { 510 case 'b': 511 width = 8; 512 break; 513 case 'h': 514 width = 16; 515 break; 516 case 'w': 517 width = 32; 518 break; 519 case 'g': 520 width = 64; 521 break; 522 default: 523 error (_("Undefined output size \"%c\"."), size); 524 } 525 526 bits[width] = '\0'; 527 while (width-- > 0) 528 { 529 bits[width] = (val_long & 1) ? '1' : '0'; 530 val_long >>= 1; 531 } 532 if (!size) 533 { 534 while (*cp && *cp == '0') 535 cp++; 536 if (*cp == '\0') 537 cp--; 538 } 539 strncpy (buf, cp, sizeof (bits)); 540 fputs_filtered (buf, stream); 541 } 542 break; 543 544 default: 545 error (_("Undefined output format \"%c\"."), options->format); 546 } 547 } 548 549 /* Specify default address for `x' command. 550 The `info lines' command uses this. */ 551 552 void 553 set_next_address (struct gdbarch *gdbarch, CORE_ADDR addr) 554 { 555 struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr; 556 557 next_gdbarch = gdbarch; 558 next_address = addr; 559 560 /* Make address available to the user as $_. */ 561 set_internalvar (lookup_internalvar ("_"), 562 value_from_pointer (ptr_type, addr)); 563 } 564 565 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM, 566 after LEADIN. Print nothing if no symbolic name is found nearby. 567 Optionally also print source file and line number, if available. 568 DO_DEMANGLE controls whether to print a symbol in its native "raw" form, 569 or to interpret it as a possible C++ name and convert it back to source 570 form. However note that DO_DEMANGLE can be overridden by the specific 571 settings of the demangle and asm_demangle variables. */ 572 573 void 574 print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr, 575 struct ui_file *stream, 576 int do_demangle, char *leadin) 577 { 578 char *name = NULL; 579 char *filename = NULL; 580 int unmapped = 0; 581 int offset = 0; 582 int line = 0; 583 584 /* Throw away both name and filename. */ 585 struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &name); 586 make_cleanup (free_current_contents, &filename); 587 588 if (build_address_symbolic (gdbarch, addr, do_demangle, &name, &offset, 589 &filename, &line, &unmapped)) 590 { 591 do_cleanups (cleanup_chain); 592 return; 593 } 594 595 fputs_filtered (leadin, stream); 596 if (unmapped) 597 fputs_filtered ("<*", stream); 598 else 599 fputs_filtered ("<", stream); 600 fputs_filtered (name, stream); 601 if (offset != 0) 602 fprintf_filtered (stream, "+%u", (unsigned int) offset); 603 604 /* Append source filename and line number if desired. Give specific 605 line # of this addr, if we have it; else line # of the nearest symbol. */ 606 if (print_symbol_filename && filename != NULL) 607 { 608 if (line != -1) 609 fprintf_filtered (stream, " at %s:%d", filename, line); 610 else 611 fprintf_filtered (stream, " in %s", filename); 612 } 613 if (unmapped) 614 fputs_filtered ("*>", stream); 615 else 616 fputs_filtered (">", stream); 617 618 do_cleanups (cleanup_chain); 619 } 620 621 /* Given an address ADDR return all the elements needed to print the 622 address in a symbolic form. NAME can be mangled or not depending 623 on DO_DEMANGLE (and also on the asm_demangle global variable, 624 manipulated via ''set print asm-demangle''). Return 0 in case of 625 success, when all the info in the OUT paramters is valid. Return 1 626 otherwise. */ 627 int 628 build_address_symbolic (struct gdbarch *gdbarch, 629 CORE_ADDR addr, /* IN */ 630 int do_demangle, /* IN */ 631 char **name, /* OUT */ 632 int *offset, /* OUT */ 633 char **filename, /* OUT */ 634 int *line, /* OUT */ 635 int *unmapped) /* OUT */ 636 { 637 struct minimal_symbol *msymbol; 638 struct symbol *symbol; 639 CORE_ADDR name_location = 0; 640 struct obj_section *section = NULL; 641 char *name_temp = ""; 642 643 /* Let's say it is mapped (not unmapped). */ 644 *unmapped = 0; 645 646 /* Determine if the address is in an overlay, and whether it is 647 mapped. */ 648 if (overlay_debugging) 649 { 650 section = find_pc_overlay (addr); 651 if (pc_in_unmapped_range (addr, section)) 652 { 653 *unmapped = 1; 654 addr = overlay_mapped_address (addr, section); 655 } 656 } 657 658 /* First try to find the address in the symbol table, then 659 in the minsyms. Take the closest one. */ 660 661 /* This is defective in the sense that it only finds text symbols. So 662 really this is kind of pointless--we should make sure that the 663 minimal symbols have everything we need (by changing that we could 664 save some memory, but for many debug format--ELF/DWARF or 665 anything/stabs--it would be inconvenient to eliminate those minimal 666 symbols anyway). */ 667 msymbol = lookup_minimal_symbol_by_pc_section (addr, section); 668 symbol = find_pc_sect_function (addr, section); 669 670 if (symbol) 671 { 672 /* If this is a function (i.e. a code address), strip out any 673 non-address bits. For instance, display a pointer to the 674 first instruction of a Thumb function as <function>; the 675 second instruction will be <function+2>, even though the 676 pointer is <function+3>. This matches the ISA behavior. */ 677 addr = gdbarch_addr_bits_remove (gdbarch, addr); 678 679 name_location = BLOCK_START (SYMBOL_BLOCK_VALUE (symbol)); 680 if (do_demangle || asm_demangle) 681 name_temp = SYMBOL_PRINT_NAME (symbol); 682 else 683 name_temp = SYMBOL_LINKAGE_NAME (symbol); 684 } 685 686 if (msymbol != NULL) 687 { 688 if (SYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL) 689 { 690 /* The msymbol is closer to the address than the symbol; 691 use the msymbol instead. */ 692 symbol = 0; 693 name_location = SYMBOL_VALUE_ADDRESS (msymbol); 694 if (do_demangle || asm_demangle) 695 name_temp = SYMBOL_PRINT_NAME (msymbol); 696 else 697 name_temp = SYMBOL_LINKAGE_NAME (msymbol); 698 } 699 } 700 if (symbol == NULL && msymbol == NULL) 701 return 1; 702 703 /* If the nearest symbol is too far away, don't print anything symbolic. */ 704 705 /* For when CORE_ADDR is larger than unsigned int, we do math in 706 CORE_ADDR. But when we detect unsigned wraparound in the 707 CORE_ADDR math, we ignore this test and print the offset, 708 because addr+max_symbolic_offset has wrapped through the end 709 of the address space back to the beginning, giving bogus comparison. */ 710 if (addr > name_location + max_symbolic_offset 711 && name_location + max_symbolic_offset > name_location) 712 return 1; 713 714 *offset = addr - name_location; 715 716 *name = xstrdup (name_temp); 717 718 if (print_symbol_filename) 719 { 720 struct symtab_and_line sal; 721 722 sal = find_pc_sect_line (addr, section, 0); 723 724 if (sal.symtab) 725 { 726 *filename = xstrdup (sal.symtab->filename); 727 *line = sal.line; 728 } 729 } 730 return 0; 731 } 732 733 734 /* Print address ADDR symbolically on STREAM. 735 First print it as a number. Then perhaps print 736 <SYMBOL + OFFSET> after the number. */ 737 738 void 739 print_address (struct gdbarch *gdbarch, 740 CORE_ADDR addr, struct ui_file *stream) 741 { 742 fputs_filtered (paddress (gdbarch, addr), stream); 743 print_address_symbolic (gdbarch, addr, stream, asm_demangle, " "); 744 } 745 746 /* Return a prefix for instruction address: 747 "=> " for current instruction, else " ". */ 748 749 const char * 750 pc_prefix (CORE_ADDR addr) 751 { 752 if (has_stack_frames ()) 753 { 754 struct frame_info *frame; 755 CORE_ADDR pc; 756 757 frame = get_selected_frame (NULL); 758 if (get_frame_pc_if_available (frame, &pc) && pc == addr) 759 return "=> "; 760 } 761 return " "; 762 } 763 764 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE 765 controls whether to print the symbolic name "raw" or demangled. 766 Global setting "addressprint" controls whether to print hex address 767 or not. */ 768 769 void 770 print_address_demangle (struct gdbarch *gdbarch, CORE_ADDR addr, 771 struct ui_file *stream, int do_demangle) 772 { 773 struct value_print_options opts; 774 775 get_user_print_options (&opts); 776 if (addr == 0) 777 { 778 fprintf_filtered (stream, "0"); 779 } 780 else 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 print_address_symbolic (gdbarch, addr, stream, do_demangle, ""); 788 } 789 } 790 791 792 /* Examine data at address ADDR in format FMT. 793 Fetch it from memory and print on gdb_stdout. */ 794 795 static void 796 do_examine (struct format_data fmt, struct gdbarch *gdbarch, CORE_ADDR addr) 797 { 798 char format = 0; 799 char size; 800 int count = 1; 801 struct type *val_type = NULL; 802 int i; 803 int maxelts; 804 struct value_print_options opts; 805 806 format = fmt.format; 807 size = fmt.size; 808 count = fmt.count; 809 next_gdbarch = gdbarch; 810 next_address = addr; 811 812 /* Instruction format implies fetch single bytes 813 regardless of the specified size. 814 The case of strings is handled in decode_format, only explicit 815 size operator are not changed to 'b'. */ 816 if (format == 'i') 817 size = 'b'; 818 819 if (size == 'a') 820 { 821 /* Pick the appropriate size for an address. */ 822 if (gdbarch_ptr_bit (next_gdbarch) == 64) 823 size = 'g'; 824 else if (gdbarch_ptr_bit (next_gdbarch) == 32) 825 size = 'w'; 826 else if (gdbarch_ptr_bit (next_gdbarch) == 16) 827 size = 'h'; 828 else 829 /* Bad value for gdbarch_ptr_bit. */ 830 internal_error (__FILE__, __LINE__, 831 _("failed internal consistency check")); 832 } 833 834 if (size == 'b') 835 val_type = builtin_type (next_gdbarch)->builtin_int8; 836 else if (size == 'h') 837 val_type = builtin_type (next_gdbarch)->builtin_int16; 838 else if (size == 'w') 839 val_type = builtin_type (next_gdbarch)->builtin_int32; 840 else if (size == 'g') 841 val_type = builtin_type (next_gdbarch)->builtin_int64; 842 843 if (format == 's') 844 { 845 struct type *char_type = NULL; 846 847 /* Search for "char16_t" or "char32_t" types or fall back to 8-bit char 848 if type is not found. */ 849 if (size == 'h') 850 char_type = builtin_type (next_gdbarch)->builtin_char16; 851 else if (size == 'w') 852 char_type = builtin_type (next_gdbarch)->builtin_char32; 853 if (char_type) 854 val_type = char_type; 855 else 856 { 857 if (size != '\0' && size != 'b') 858 warning (_("Unable to display strings with " 859 "size '%c', using 'b' instead."), size); 860 size = 'b'; 861 val_type = builtin_type (next_gdbarch)->builtin_int8; 862 } 863 } 864 865 maxelts = 8; 866 if (size == 'w') 867 maxelts = 4; 868 if (size == 'g') 869 maxelts = 2; 870 if (format == 's' || format == 'i') 871 maxelts = 1; 872 873 get_formatted_print_options (&opts, format); 874 875 /* Print as many objects as specified in COUNT, at most maxelts per line, 876 with the address of the next one at the start of each line. */ 877 878 while (count > 0) 879 { 880 QUIT; 881 if (format == 'i') 882 fputs_filtered (pc_prefix (next_address), gdb_stdout); 883 print_address (next_gdbarch, next_address, gdb_stdout); 884 printf_filtered (":"); 885 for (i = maxelts; 886 i > 0 && count > 0; 887 i--, count--) 888 { 889 printf_filtered ("\t"); 890 /* Note that print_formatted sets next_address for the next 891 object. */ 892 last_examine_address = next_address; 893 894 if (last_examine_value) 895 value_free (last_examine_value); 896 897 /* The value to be displayed is not fetched greedily. 898 Instead, to avoid the possibility of a fetched value not 899 being used, its retrieval is delayed until the print code 900 uses it. When examining an instruction stream, the 901 disassembler will perform its own memory fetch using just 902 the address stored in LAST_EXAMINE_VALUE. FIXME: Should 903 the disassembler be modified so that LAST_EXAMINE_VALUE 904 is left with the byte sequence from the last complete 905 instruction fetched from memory? */ 906 last_examine_value = value_at_lazy (val_type, next_address); 907 908 if (last_examine_value) 909 release_value (last_examine_value); 910 911 print_formatted (last_examine_value, size, &opts, gdb_stdout); 912 913 /* Display any branch delay slots following the final insn. */ 914 if (format == 'i' && count == 1) 915 count += branch_delay_insns; 916 } 917 printf_filtered ("\n"); 918 gdb_flush (gdb_stdout); 919 } 920 } 921 922 static void 923 validate_format (struct format_data fmt, char *cmdname) 924 { 925 if (fmt.size != 0) 926 error (_("Size letters are meaningless in \"%s\" command."), cmdname); 927 if (fmt.count != 1) 928 error (_("Item count other than 1 is meaningless in \"%s\" command."), 929 cmdname); 930 if (fmt.format == 'i') 931 error (_("Format letter \"%c\" is meaningless in \"%s\" command."), 932 fmt.format, cmdname); 933 } 934 935 /* Evaluate string EXP as an expression in the current language and 936 print the resulting value. EXP may contain a format specifier as the 937 first argument ("/x myvar" for example, to print myvar in hex). */ 938 939 static void 940 print_command_1 (char *exp, int inspect, int voidprint) 941 { 942 struct expression *expr; 943 struct cleanup *old_chain = 0; 944 char format = 0; 945 struct value *val; 946 struct format_data fmt; 947 int cleanup = 0; 948 949 if (exp && *exp == '/') 950 { 951 exp++; 952 fmt = decode_format (&exp, last_format, 0); 953 validate_format (fmt, "print"); 954 last_format = format = fmt.format; 955 } 956 else 957 { 958 fmt.count = 1; 959 fmt.format = 0; 960 fmt.size = 0; 961 fmt.raw = 0; 962 } 963 964 if (exp && *exp) 965 { 966 expr = parse_expression (exp); 967 old_chain = make_cleanup (free_current_contents, &expr); 968 cleanup = 1; 969 val = evaluate_expression (expr); 970 } 971 else 972 val = access_value_history (0); 973 974 if (voidprint || (val && value_type (val) && 975 TYPE_CODE (value_type (val)) != TYPE_CODE_VOID)) 976 { 977 struct value_print_options opts; 978 int histindex = record_latest_value (val); 979 980 if (histindex >= 0) 981 annotate_value_history_begin (histindex, value_type (val)); 982 else 983 annotate_value_begin (value_type (val)); 984 985 if (inspect) 986 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"", 987 exp, histindex); 988 else if (histindex >= 0) 989 printf_filtered ("$%d = ", histindex); 990 991 if (histindex >= 0) 992 annotate_value_history_value (); 993 994 get_formatted_print_options (&opts, format); 995 opts.inspect_it = inspect; 996 opts.raw = fmt.raw; 997 998 print_formatted (val, fmt.size, &opts, gdb_stdout); 999 printf_filtered ("\n"); 1000 1001 if (histindex >= 0) 1002 annotate_value_history_end (); 1003 else 1004 annotate_value_end (); 1005 1006 if (inspect) 1007 printf_unfiltered ("\") )\030"); 1008 } 1009 1010 if (cleanup) 1011 do_cleanups (old_chain); 1012 } 1013 1014 static void 1015 print_command (char *exp, int from_tty) 1016 { 1017 print_command_1 (exp, 0, 1); 1018 } 1019 1020 /* Same as print, except in epoch, it gets its own window. */ 1021 static void 1022 inspect_command (char *exp, int from_tty) 1023 { 1024 extern int epoch_interface; 1025 1026 print_command_1 (exp, epoch_interface, 1); 1027 } 1028 1029 /* Same as print, except it doesn't print void results. */ 1030 static void 1031 call_command (char *exp, int from_tty) 1032 { 1033 print_command_1 (exp, 0, 0); 1034 } 1035 1036 void 1037 output_command (char *exp, int from_tty) 1038 { 1039 struct expression *expr; 1040 struct cleanup *old_chain; 1041 char format = 0; 1042 struct value *val; 1043 struct format_data fmt; 1044 struct value_print_options opts; 1045 1046 fmt.size = 0; 1047 fmt.raw = 0; 1048 1049 if (exp && *exp == '/') 1050 { 1051 exp++; 1052 fmt = decode_format (&exp, 0, 0); 1053 validate_format (fmt, "output"); 1054 format = fmt.format; 1055 } 1056 1057 expr = parse_expression (exp); 1058 old_chain = make_cleanup (free_current_contents, &expr); 1059 1060 val = evaluate_expression (expr); 1061 1062 annotate_value_begin (value_type (val)); 1063 1064 get_formatted_print_options (&opts, format); 1065 opts.raw = fmt.raw; 1066 print_formatted (val, fmt.size, &opts, gdb_stdout); 1067 1068 annotate_value_end (); 1069 1070 wrap_here (""); 1071 gdb_flush (gdb_stdout); 1072 1073 do_cleanups (old_chain); 1074 } 1075 1076 static void 1077 set_command (char *exp, int from_tty) 1078 { 1079 struct expression *expr = parse_expression (exp); 1080 struct cleanup *old_chain = 1081 make_cleanup (free_current_contents, &expr); 1082 1083 evaluate_expression (expr); 1084 do_cleanups (old_chain); 1085 } 1086 1087 static void 1088 sym_info (char *arg, int from_tty) 1089 { 1090 struct minimal_symbol *msymbol; 1091 struct objfile *objfile; 1092 struct obj_section *osect; 1093 CORE_ADDR addr, sect_addr; 1094 int matches = 0; 1095 unsigned int offset; 1096 1097 if (!arg) 1098 error_no_arg (_("address")); 1099 1100 addr = parse_and_eval_address (arg); 1101 ALL_OBJSECTIONS (objfile, osect) 1102 { 1103 /* Only process each object file once, even if there's a separate 1104 debug file. */ 1105 if (objfile->separate_debug_objfile_backlink) 1106 continue; 1107 1108 sect_addr = overlay_mapped_address (addr, osect); 1109 1110 if (obj_section_addr (osect) <= sect_addr 1111 && sect_addr < obj_section_endaddr (osect) 1112 && (msymbol = lookup_minimal_symbol_by_pc_section (sect_addr, osect))) 1113 { 1114 const char *obj_name, *mapped, *sec_name, *msym_name; 1115 char *loc_string; 1116 struct cleanup *old_chain; 1117 1118 matches = 1; 1119 offset = sect_addr - SYMBOL_VALUE_ADDRESS (msymbol); 1120 mapped = section_is_mapped (osect) ? _("mapped") : _("unmapped"); 1121 sec_name = osect->the_bfd_section->name; 1122 msym_name = SYMBOL_PRINT_NAME (msymbol); 1123 1124 /* Don't print the offset if it is zero. 1125 We assume there's no need to handle i18n of "sym + offset". */ 1126 if (offset) 1127 loc_string = xstrprintf ("%s + %u", msym_name, offset); 1128 else 1129 loc_string = xstrprintf ("%s", msym_name); 1130 1131 /* Use a cleanup to free loc_string in case the user quits 1132 a pagination request inside printf_filtered. */ 1133 old_chain = make_cleanup (xfree, loc_string); 1134 1135 gdb_assert (osect->objfile && osect->objfile->name); 1136 obj_name = osect->objfile->name; 1137 1138 if (MULTI_OBJFILE_P ()) 1139 if (pc_in_unmapped_range (addr, osect)) 1140 if (section_is_overlay (osect)) 1141 printf_filtered (_("%s in load address range of " 1142 "%s overlay section %s of %s\n"), 1143 loc_string, mapped, sec_name, obj_name); 1144 else 1145 printf_filtered (_("%s in load address range of " 1146 "section %s of %s\n"), 1147 loc_string, sec_name, obj_name); 1148 else 1149 if (section_is_overlay (osect)) 1150 printf_filtered (_("%s in %s overlay section %s of %s\n"), 1151 loc_string, mapped, sec_name, obj_name); 1152 else 1153 printf_filtered (_("%s in section %s of %s\n"), 1154 loc_string, sec_name, obj_name); 1155 else 1156 if (pc_in_unmapped_range (addr, osect)) 1157 if (section_is_overlay (osect)) 1158 printf_filtered (_("%s in load address range of %s overlay " 1159 "section %s\n"), 1160 loc_string, mapped, sec_name); 1161 else 1162 printf_filtered (_("%s in load address range of section %s\n"), 1163 loc_string, sec_name); 1164 else 1165 if (section_is_overlay (osect)) 1166 printf_filtered (_("%s in %s overlay section %s\n"), 1167 loc_string, mapped, sec_name); 1168 else 1169 printf_filtered (_("%s in section %s\n"), 1170 loc_string, sec_name); 1171 1172 do_cleanups (old_chain); 1173 } 1174 } 1175 if (matches == 0) 1176 printf_filtered (_("No symbol matches %s.\n"), arg); 1177 } 1178 1179 static void 1180 address_info (char *exp, int from_tty) 1181 { 1182 struct gdbarch *gdbarch; 1183 int regno; 1184 struct symbol *sym; 1185 struct minimal_symbol *msymbol; 1186 long val; 1187 struct obj_section *section; 1188 CORE_ADDR load_addr, context_pc = 0; 1189 int is_a_field_of_this; /* C++: lookup_symbol sets this to nonzero 1190 if exp is a field of `this'. */ 1191 1192 if (exp == 0) 1193 error (_("Argument required.")); 1194 1195 sym = lookup_symbol (exp, get_selected_block (&context_pc), VAR_DOMAIN, 1196 &is_a_field_of_this); 1197 if (sym == NULL) 1198 { 1199 if (is_a_field_of_this) 1200 { 1201 printf_filtered ("Symbol \""); 1202 fprintf_symbol_filtered (gdb_stdout, exp, 1203 current_language->la_language, DMGL_ANSI); 1204 printf_filtered ("\" is a field of the local class variable "); 1205 if (current_language->la_language == language_objc) 1206 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */ 1207 else 1208 printf_filtered ("`this'\n"); 1209 return; 1210 } 1211 1212 msymbol = lookup_minimal_symbol (exp, NULL, NULL); 1213 1214 if (msymbol != NULL) 1215 { 1216 gdbarch = get_objfile_arch (msymbol_objfile (msymbol)); 1217 load_addr = SYMBOL_VALUE_ADDRESS (msymbol); 1218 1219 printf_filtered ("Symbol \""); 1220 fprintf_symbol_filtered (gdb_stdout, exp, 1221 current_language->la_language, DMGL_ANSI); 1222 printf_filtered ("\" is at "); 1223 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1224 printf_filtered (" in a file compiled without debugging"); 1225 section = SYMBOL_OBJ_SECTION (msymbol); 1226 if (section_is_overlay (section)) 1227 { 1228 load_addr = overlay_unmapped_address (load_addr, section); 1229 printf_filtered (",\n -- loaded at "); 1230 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1231 printf_filtered (" in overlay section %s", 1232 section->the_bfd_section->name); 1233 } 1234 printf_filtered (".\n"); 1235 } 1236 else 1237 error (_("No symbol \"%s\" in current context."), exp); 1238 return; 1239 } 1240 1241 printf_filtered ("Symbol \""); 1242 fprintf_symbol_filtered (gdb_stdout, SYMBOL_PRINT_NAME (sym), 1243 current_language->la_language, DMGL_ANSI); 1244 printf_filtered ("\" is "); 1245 val = SYMBOL_VALUE (sym); 1246 section = SYMBOL_OBJ_SECTION (sym); 1247 gdbarch = get_objfile_arch (SYMBOL_SYMTAB (sym)->objfile); 1248 1249 switch (SYMBOL_CLASS (sym)) 1250 { 1251 case LOC_CONST: 1252 case LOC_CONST_BYTES: 1253 printf_filtered ("constant"); 1254 break; 1255 1256 case LOC_LABEL: 1257 printf_filtered ("a label at address "); 1258 load_addr = SYMBOL_VALUE_ADDRESS (sym); 1259 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1260 if (section_is_overlay (section)) 1261 { 1262 load_addr = overlay_unmapped_address (load_addr, section); 1263 printf_filtered (",\n -- loaded at "); 1264 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1265 printf_filtered (" in overlay section %s", 1266 section->the_bfd_section->name); 1267 } 1268 break; 1269 1270 case LOC_COMPUTED: 1271 /* FIXME: cagney/2004-01-26: It should be possible to 1272 unconditionally call the SYMBOL_COMPUTED_OPS method when available. 1273 Unfortunately DWARF 2 stores the frame-base (instead of the 1274 function) location in a function's symbol. Oops! For the 1275 moment enable this when/where applicable. */ 1276 SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, context_pc, 1277 gdb_stdout); 1278 break; 1279 1280 case LOC_REGISTER: 1281 /* GDBARCH is the architecture associated with the objfile the symbol 1282 is defined in; the target architecture may be different, and may 1283 provide additional registers. However, we do not know the target 1284 architecture at this point. We assume the objfile architecture 1285 will contain all the standard registers that occur in debug info 1286 in that objfile. */ 1287 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch); 1288 1289 if (SYMBOL_IS_ARGUMENT (sym)) 1290 printf_filtered (_("an argument in register %s"), 1291 gdbarch_register_name (gdbarch, regno)); 1292 else 1293 printf_filtered (_("a variable in register %s"), 1294 gdbarch_register_name (gdbarch, regno)); 1295 break; 1296 1297 case LOC_STATIC: 1298 printf_filtered (_("static storage at address ")); 1299 load_addr = SYMBOL_VALUE_ADDRESS (sym); 1300 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1301 if (section_is_overlay (section)) 1302 { 1303 load_addr = overlay_unmapped_address (load_addr, section); 1304 printf_filtered (_(",\n -- loaded at ")); 1305 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1306 printf_filtered (_(" in overlay section %s"), 1307 section->the_bfd_section->name); 1308 } 1309 break; 1310 1311 case LOC_REGPARM_ADDR: 1312 /* Note comment at LOC_REGISTER. */ 1313 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch); 1314 printf_filtered (_("address of an argument in register %s"), 1315 gdbarch_register_name (gdbarch, regno)); 1316 break; 1317 1318 case LOC_ARG: 1319 printf_filtered (_("an argument at offset %ld"), val); 1320 break; 1321 1322 case LOC_LOCAL: 1323 printf_filtered (_("a local variable at frame offset %ld"), val); 1324 break; 1325 1326 case LOC_REF_ARG: 1327 printf_filtered (_("a reference argument at offset %ld"), val); 1328 break; 1329 1330 case LOC_TYPEDEF: 1331 printf_filtered (_("a typedef")); 1332 break; 1333 1334 case LOC_BLOCK: 1335 printf_filtered (_("a function at address ")); 1336 load_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym)); 1337 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1338 if (section_is_overlay (section)) 1339 { 1340 load_addr = overlay_unmapped_address (load_addr, section); 1341 printf_filtered (_(",\n -- loaded at ")); 1342 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1343 printf_filtered (_(" in overlay section %s"), 1344 section->the_bfd_section->name); 1345 } 1346 break; 1347 1348 case LOC_UNRESOLVED: 1349 { 1350 struct minimal_symbol *msym; 1351 1352 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym), NULL, NULL); 1353 if (msym == NULL) 1354 printf_filtered ("unresolved"); 1355 else 1356 { 1357 section = SYMBOL_OBJ_SECTION (msym); 1358 load_addr = SYMBOL_VALUE_ADDRESS (msym); 1359 1360 if (section 1361 && (section->the_bfd_section->flags & SEC_THREAD_LOCAL) != 0) 1362 printf_filtered (_("a thread-local variable at offset %s " 1363 "in the thread-local storage for `%s'"), 1364 paddress (gdbarch, load_addr), 1365 section->objfile->name); 1366 else 1367 { 1368 printf_filtered (_("static storage at address ")); 1369 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1370 if (section_is_overlay (section)) 1371 { 1372 load_addr = overlay_unmapped_address (load_addr, section); 1373 printf_filtered (_(",\n -- loaded at ")); 1374 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1375 printf_filtered (_(" in overlay section %s"), 1376 section->the_bfd_section->name); 1377 } 1378 } 1379 } 1380 } 1381 break; 1382 1383 case LOC_OPTIMIZED_OUT: 1384 printf_filtered (_("optimized out")); 1385 break; 1386 1387 default: 1388 printf_filtered (_("of unknown (botched) type")); 1389 break; 1390 } 1391 printf_filtered (".\n"); 1392 } 1393 1394 1395 static void 1396 x_command (char *exp, int from_tty) 1397 { 1398 struct expression *expr; 1399 struct format_data fmt; 1400 struct cleanup *old_chain; 1401 struct value *val; 1402 1403 fmt.format = last_format ? last_format : 'x'; 1404 fmt.size = last_size; 1405 fmt.count = 1; 1406 fmt.raw = 0; 1407 1408 if (exp && *exp == '/') 1409 { 1410 exp++; 1411 fmt = decode_format (&exp, last_format, last_size); 1412 } 1413 1414 /* If we have an expression, evaluate it and use it as the address. */ 1415 1416 if (exp != 0 && *exp != 0) 1417 { 1418 expr = parse_expression (exp); 1419 /* Cause expression not to be there any more if this command is 1420 repeated with Newline. But don't clobber a user-defined 1421 command's definition. */ 1422 if (from_tty) 1423 *exp = 0; 1424 old_chain = make_cleanup (free_current_contents, &expr); 1425 val = evaluate_expression (expr); 1426 if (TYPE_CODE (value_type (val)) == TYPE_CODE_REF) 1427 val = coerce_ref (val); 1428 /* In rvalue contexts, such as this, functions are coerced into 1429 pointers to functions. This makes "x/i main" work. */ 1430 if (/* last_format == 'i' && */ 1431 TYPE_CODE (value_type (val)) == TYPE_CODE_FUNC 1432 && VALUE_LVAL (val) == lval_memory) 1433 next_address = value_address (val); 1434 else 1435 next_address = value_as_address (val); 1436 1437 next_gdbarch = expr->gdbarch; 1438 do_cleanups (old_chain); 1439 } 1440 1441 if (!next_gdbarch) 1442 error_no_arg (_("starting display address")); 1443 1444 do_examine (fmt, next_gdbarch, next_address); 1445 1446 /* If the examine succeeds, we remember its size and format for next 1447 time. Set last_size to 'b' for strings. */ 1448 if (fmt.format == 's') 1449 last_size = 'b'; 1450 else 1451 last_size = fmt.size; 1452 last_format = fmt.format; 1453 1454 /* Set a couple of internal variables if appropriate. */ 1455 if (last_examine_value) 1456 { 1457 /* Make last address examined available to the user as $_. Use 1458 the correct pointer type. */ 1459 struct type *pointer_type 1460 = lookup_pointer_type (value_type (last_examine_value)); 1461 set_internalvar (lookup_internalvar ("_"), 1462 value_from_pointer (pointer_type, 1463 last_examine_address)); 1464 1465 /* Make contents of last address examined available to the user 1466 as $__. If the last value has not been fetched from memory 1467 then don't fetch it now; instead mark it by voiding the $__ 1468 variable. */ 1469 if (value_lazy (last_examine_value)) 1470 clear_internalvar (lookup_internalvar ("__")); 1471 else 1472 set_internalvar (lookup_internalvar ("__"), last_examine_value); 1473 } 1474 } 1475 1476 1477 /* Add an expression to the auto-display chain. 1478 Specify the expression. */ 1479 1480 static void 1481 display_command (char *exp, int from_tty) 1482 { 1483 struct format_data fmt; 1484 struct expression *expr; 1485 struct display *new; 1486 int display_it = 1; 1487 1488 #if defined(TUI) 1489 /* NOTE: cagney/2003-02-13 The `tui_active' was previously 1490 `tui_version'. */ 1491 if (tui_active && exp != NULL && *exp == '$') 1492 display_it = (tui_set_layout_for_display_command (exp) == TUI_FAILURE); 1493 #endif 1494 1495 if (display_it) 1496 { 1497 if (exp == 0) 1498 { 1499 do_displays (); 1500 return; 1501 } 1502 1503 if (*exp == '/') 1504 { 1505 exp++; 1506 fmt = decode_format (&exp, 0, 0); 1507 if (fmt.size && fmt.format == 0) 1508 fmt.format = 'x'; 1509 if (fmt.format == 'i' || fmt.format == 's') 1510 fmt.size = 'b'; 1511 } 1512 else 1513 { 1514 fmt.format = 0; 1515 fmt.size = 0; 1516 fmt.count = 0; 1517 fmt.raw = 0; 1518 } 1519 1520 innermost_block = NULL; 1521 expr = parse_expression (exp); 1522 1523 new = (struct display *) xmalloc (sizeof (struct display)); 1524 1525 new->exp_string = xstrdup (exp); 1526 new->exp = expr; 1527 new->block = innermost_block; 1528 new->pspace = current_program_space; 1529 new->next = display_chain; 1530 new->number = ++display_number; 1531 new->format = fmt; 1532 new->enabled_p = 1; 1533 display_chain = new; 1534 1535 if (from_tty && target_has_execution) 1536 do_one_display (new); 1537 1538 dont_repeat (); 1539 } 1540 } 1541 1542 static void 1543 free_display (struct display *d) 1544 { 1545 xfree (d->exp_string); 1546 xfree (d->exp); 1547 xfree (d); 1548 } 1549 1550 /* Clear out the display_chain. Done when new symtabs are loaded, 1551 since this invalidates the types stored in many expressions. */ 1552 1553 void 1554 clear_displays (void) 1555 { 1556 struct display *d; 1557 1558 while ((d = display_chain) != NULL) 1559 { 1560 display_chain = d->next; 1561 free_display (d); 1562 } 1563 } 1564 1565 /* Delete the auto-display DISPLAY. */ 1566 1567 static void 1568 delete_display (struct display *display) 1569 { 1570 struct display *d; 1571 1572 gdb_assert (display != NULL); 1573 1574 if (display_chain == display) 1575 display_chain = display->next; 1576 1577 ALL_DISPLAYS (d) 1578 if (d->next == display) 1579 { 1580 d->next = display->next; 1581 break; 1582 } 1583 1584 free_display (display); 1585 } 1586 1587 /* Call FUNCTION on each of the displays whose numbers are given in 1588 ARGS. DATA is passed unmodified to FUNCTION. */ 1589 1590 static void 1591 map_display_numbers (char *args, 1592 void (*function) (struct display *, 1593 void *), 1594 void *data) 1595 { 1596 struct get_number_or_range_state state; 1597 struct display *b, *tmp; 1598 int num; 1599 1600 if (args == NULL) 1601 error_no_arg (_("one or more display numbers")); 1602 1603 init_number_or_range (&state, args); 1604 1605 while (!state.finished) 1606 { 1607 char *p = state.string; 1608 1609 num = get_number_or_range (&state); 1610 if (num == 0) 1611 warning (_("bad display number at or near '%s'"), p); 1612 else 1613 { 1614 struct display *d, *tmp; 1615 1616 ALL_DISPLAYS_SAFE (d, tmp) 1617 if (d->number == num) 1618 break; 1619 if (d == NULL) 1620 printf_unfiltered (_("No display number %d.\n"), num); 1621 else 1622 function (d, data); 1623 } 1624 } 1625 } 1626 1627 /* Callback for map_display_numbers, that deletes a display. */ 1628 1629 static void 1630 do_delete_display (struct display *d, void *data) 1631 { 1632 delete_display (d); 1633 } 1634 1635 /* "undisplay" command. */ 1636 1637 static void 1638 undisplay_command (char *args, int from_tty) 1639 { 1640 int num; 1641 struct get_number_or_range_state state; 1642 1643 if (args == NULL) 1644 { 1645 if (query (_("Delete all auto-display expressions? "))) 1646 clear_displays (); 1647 dont_repeat (); 1648 return; 1649 } 1650 1651 map_display_numbers (args, do_delete_display, NULL); 1652 dont_repeat (); 1653 } 1654 1655 /* Display a single auto-display. 1656 Do nothing if the display cannot be printed in the current context, 1657 or if the display is disabled. */ 1658 1659 static void 1660 do_one_display (struct display *d) 1661 { 1662 struct cleanup *old_chain; 1663 int within_current_scope; 1664 1665 if (d->enabled_p == 0) 1666 return; 1667 1668 /* The expression carries the architecture that was used at parse time. 1669 This is a problem if the expression depends on architecture features 1670 (e.g. register numbers), and the current architecture is now different. 1671 For example, a display statement like "display/i $pc" is expected to 1672 display the PC register of the current architecture, not the arch at 1673 the time the display command was given. Therefore, we re-parse the 1674 expression if the current architecture has changed. */ 1675 if (d->exp != NULL && d->exp->gdbarch != get_current_arch ()) 1676 { 1677 xfree (d->exp); 1678 d->exp = NULL; 1679 d->block = NULL; 1680 } 1681 1682 if (d->exp == NULL) 1683 { 1684 volatile struct gdb_exception ex; 1685 1686 TRY_CATCH (ex, RETURN_MASK_ALL) 1687 { 1688 innermost_block = NULL; 1689 d->exp = parse_expression (d->exp_string); 1690 d->block = innermost_block; 1691 } 1692 if (ex.reason < 0) 1693 { 1694 /* Can't re-parse the expression. Disable this display item. */ 1695 d->enabled_p = 0; 1696 warning (_("Unable to display \"%s\": %s"), 1697 d->exp_string, ex.message); 1698 return; 1699 } 1700 } 1701 1702 if (d->block) 1703 { 1704 if (d->pspace == current_program_space) 1705 within_current_scope = contained_in (get_selected_block (0), d->block); 1706 else 1707 within_current_scope = 0; 1708 } 1709 else 1710 within_current_scope = 1; 1711 if (!within_current_scope) 1712 return; 1713 1714 old_chain = make_cleanup_restore_integer (¤t_display_number); 1715 current_display_number = d->number; 1716 1717 annotate_display_begin (); 1718 printf_filtered ("%d", d->number); 1719 annotate_display_number_end (); 1720 printf_filtered (": "); 1721 if (d->format.size) 1722 { 1723 volatile struct gdb_exception ex; 1724 1725 annotate_display_format (); 1726 1727 printf_filtered ("x/"); 1728 if (d->format.count != 1) 1729 printf_filtered ("%d", d->format.count); 1730 printf_filtered ("%c", d->format.format); 1731 if (d->format.format != 'i' && d->format.format != 's') 1732 printf_filtered ("%c", d->format.size); 1733 printf_filtered (" "); 1734 1735 annotate_display_expression (); 1736 1737 puts_filtered (d->exp_string); 1738 annotate_display_expression_end (); 1739 1740 if (d->format.count != 1 || d->format.format == 'i') 1741 printf_filtered ("\n"); 1742 else 1743 printf_filtered (" "); 1744 1745 annotate_display_value (); 1746 1747 TRY_CATCH (ex, RETURN_MASK_ERROR) 1748 { 1749 struct value *val; 1750 CORE_ADDR addr; 1751 1752 val = evaluate_expression (d->exp); 1753 addr = value_as_address (val); 1754 if (d->format.format == 'i') 1755 addr = gdbarch_addr_bits_remove (d->exp->gdbarch, addr); 1756 do_examine (d->format, d->exp->gdbarch, addr); 1757 } 1758 if (ex.reason < 0) 1759 fprintf_filtered (gdb_stdout, _("<error: %s>\n"), ex.message); 1760 } 1761 else 1762 { 1763 struct value_print_options opts; 1764 volatile struct gdb_exception ex; 1765 1766 annotate_display_format (); 1767 1768 if (d->format.format) 1769 printf_filtered ("/%c ", d->format.format); 1770 1771 annotate_display_expression (); 1772 1773 puts_filtered (d->exp_string); 1774 annotate_display_expression_end (); 1775 1776 printf_filtered (" = "); 1777 1778 annotate_display_expression (); 1779 1780 get_formatted_print_options (&opts, d->format.format); 1781 opts.raw = d->format.raw; 1782 1783 TRY_CATCH (ex, RETURN_MASK_ERROR) 1784 { 1785 struct value *val; 1786 1787 val = evaluate_expression (d->exp); 1788 print_formatted (val, d->format.size, &opts, gdb_stdout); 1789 } 1790 if (ex.reason < 0) 1791 fprintf_filtered (gdb_stdout, _("<error: %s>"), ex.message); 1792 printf_filtered ("\n"); 1793 } 1794 1795 annotate_display_end (); 1796 1797 gdb_flush (gdb_stdout); 1798 do_cleanups (old_chain); 1799 } 1800 1801 /* Display all of the values on the auto-display chain which can be 1802 evaluated in the current scope. */ 1803 1804 void 1805 do_displays (void) 1806 { 1807 struct display *d; 1808 1809 for (d = display_chain; d; d = d->next) 1810 do_one_display (d); 1811 } 1812 1813 /* Delete the auto-display which we were in the process of displaying. 1814 This is done when there is an error or a signal. */ 1815 1816 void 1817 disable_display (int num) 1818 { 1819 struct display *d; 1820 1821 for (d = display_chain; d; d = d->next) 1822 if (d->number == num) 1823 { 1824 d->enabled_p = 0; 1825 return; 1826 } 1827 printf_unfiltered (_("No display number %d.\n"), num); 1828 } 1829 1830 void 1831 disable_current_display (void) 1832 { 1833 if (current_display_number >= 0) 1834 { 1835 disable_display (current_display_number); 1836 fprintf_unfiltered (gdb_stderr, 1837 _("Disabling display %d to " 1838 "avoid infinite recursion.\n"), 1839 current_display_number); 1840 } 1841 current_display_number = -1; 1842 } 1843 1844 static void 1845 display_info (char *ignore, int from_tty) 1846 { 1847 struct display *d; 1848 1849 if (!display_chain) 1850 printf_unfiltered (_("There are no auto-display expressions now.\n")); 1851 else 1852 printf_filtered (_("Auto-display expressions now in effect:\n\ 1853 Num Enb Expression\n")); 1854 1855 for (d = display_chain; d; d = d->next) 1856 { 1857 printf_filtered ("%d: %c ", d->number, "ny"[(int) d->enabled_p]); 1858 if (d->format.size) 1859 printf_filtered ("/%d%c%c ", d->format.count, d->format.size, 1860 d->format.format); 1861 else if (d->format.format) 1862 printf_filtered ("/%c ", d->format.format); 1863 puts_filtered (d->exp_string); 1864 if (d->block && !contained_in (get_selected_block (0), d->block)) 1865 printf_filtered (_(" (cannot be evaluated in the current context)")); 1866 printf_filtered ("\n"); 1867 gdb_flush (gdb_stdout); 1868 } 1869 } 1870 1871 /* Callback fo map_display_numbers, that enables or disables the 1872 passed in display D. */ 1873 1874 static void 1875 do_enable_disable_display (struct display *d, void *data) 1876 { 1877 d->enabled_p = *(int *) data; 1878 } 1879 1880 /* Implamentation of both the "disable display" and "enable display" 1881 commands. ENABLE decides what to do. */ 1882 1883 static void 1884 enable_disable_display_command (char *args, int from_tty, int enable) 1885 { 1886 if (args == NULL) 1887 { 1888 struct display *d; 1889 1890 ALL_DISPLAYS (d) 1891 d->enabled_p = enable; 1892 return; 1893 } 1894 1895 map_display_numbers (args, do_enable_disable_display, &enable); 1896 } 1897 1898 /* The "enable display" command. */ 1899 1900 static void 1901 enable_display_command (char *args, int from_tty) 1902 { 1903 enable_disable_display_command (args, from_tty, 1); 1904 } 1905 1906 /* The "disable display" command. */ 1907 1908 static void 1909 disable_display_command (char *args, int from_tty) 1910 { 1911 enable_disable_display_command (args, from_tty, 0); 1912 } 1913 1914 /* display_chain items point to blocks and expressions. Some expressions in 1915 turn may point to symbols. 1916 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are 1917 obstack_free'd when a shared library is unloaded. 1918 Clear pointers that are about to become dangling. 1919 Both .exp and .block fields will be restored next time we need to display 1920 an item by re-parsing .exp_string field in the new execution context. */ 1921 1922 static void 1923 clear_dangling_display_expressions (struct so_list *solib) 1924 { 1925 struct objfile *objfile = solib->objfile; 1926 struct display *d; 1927 1928 /* With no symbol file we cannot have a block or expression from it. */ 1929 if (objfile == NULL) 1930 return; 1931 if (objfile->separate_debug_objfile_backlink) 1932 objfile = objfile->separate_debug_objfile_backlink; 1933 gdb_assert (objfile->pspace == solib->pspace); 1934 1935 for (d = display_chain; d != NULL; d = d->next) 1936 { 1937 if (d->pspace != solib->pspace) 1938 continue; 1939 1940 if (lookup_objfile_from_block (d->block) == objfile 1941 || (d->exp && exp_uses_objfile (d->exp, objfile))) 1942 { 1943 xfree (d->exp); 1944 d->exp = NULL; 1945 d->block = NULL; 1946 } 1947 } 1948 } 1949 1950 1951 /* Print the value in stack frame FRAME of a variable specified by a 1952 struct symbol. NAME is the name to print; if NULL then VAR's print 1953 name will be used. STREAM is the ui_file on which to print the 1954 value. INDENT specifies the number of indent levels to print 1955 before printing the variable name. */ 1956 1957 void 1958 print_variable_and_value (const char *name, struct symbol *var, 1959 struct frame_info *frame, 1960 struct ui_file *stream, int indent) 1961 { 1962 volatile struct gdb_exception except; 1963 1964 if (!name) 1965 name = SYMBOL_PRINT_NAME (var); 1966 1967 fprintf_filtered (stream, "%s%s = ", n_spaces (2 * indent), name); 1968 TRY_CATCH (except, RETURN_MASK_ERROR) 1969 { 1970 struct value *val; 1971 struct value_print_options opts; 1972 1973 val = read_var_value (var, frame); 1974 get_user_print_options (&opts); 1975 opts.deref_ref = 1; 1976 common_val_print (val, stream, indent, &opts, current_language); 1977 } 1978 if (except.reason < 0) 1979 fprintf_filtered(stream, "<error reading variable %s (%s)>", name, 1980 except.message); 1981 fprintf_filtered (stream, "\n"); 1982 } 1983 1984 /* printf "printf format string" ARG to STREAM. */ 1985 1986 static void 1987 ui_printf (char *arg, struct ui_file *stream) 1988 { 1989 char *f = NULL; 1990 char *s = arg; 1991 char *string = NULL; 1992 struct value **val_args; 1993 char *substrings; 1994 char *current_substring; 1995 int nargs = 0; 1996 int allocated_args = 20; 1997 struct cleanup *old_cleanups; 1998 1999 val_args = xmalloc (allocated_args * sizeof (struct value *)); 2000 old_cleanups = make_cleanup (free_current_contents, &val_args); 2001 2002 if (s == 0) 2003 error_no_arg (_("format-control string and values to print")); 2004 2005 s = skip_spaces (s); 2006 2007 /* A format string should follow, enveloped in double quotes. */ 2008 if (*s++ != '"') 2009 error (_("Bad format string, missing '\"'.")); 2010 2011 /* Parse the format-control string and copy it into the string STRING, 2012 processing some kinds of escape sequence. */ 2013 2014 f = string = (char *) alloca (strlen (s) + 1); 2015 2016 while (*s != '"') 2017 { 2018 int c = *s++; 2019 switch (c) 2020 { 2021 case '\0': 2022 error (_("Bad format string, non-terminated '\"'.")); 2023 2024 case '\\': 2025 switch (c = *s++) 2026 { 2027 case '\\': 2028 *f++ = '\\'; 2029 break; 2030 case 'a': 2031 *f++ = '\a'; 2032 break; 2033 case 'b': 2034 *f++ = '\b'; 2035 break; 2036 case 'f': 2037 *f++ = '\f'; 2038 break; 2039 case 'n': 2040 *f++ = '\n'; 2041 break; 2042 case 'r': 2043 *f++ = '\r'; 2044 break; 2045 case 't': 2046 *f++ = '\t'; 2047 break; 2048 case 'v': 2049 *f++ = '\v'; 2050 break; 2051 case '"': 2052 *f++ = '"'; 2053 break; 2054 default: 2055 /* ??? TODO: handle other escape sequences. */ 2056 error (_("Unrecognized escape character \\%c in format string."), 2057 c); 2058 } 2059 break; 2060 2061 default: 2062 *f++ = c; 2063 } 2064 } 2065 2066 /* Skip over " and following space and comma. */ 2067 s++; 2068 *f++ = '\0'; 2069 s = skip_spaces (s); 2070 2071 if (*s != ',' && *s != 0) 2072 error (_("Invalid argument syntax")); 2073 2074 if (*s == ',') 2075 s++; 2076 s = skip_spaces (s); 2077 2078 /* Need extra space for the '\0's. Doubling the size is sufficient. */ 2079 substrings = alloca (strlen (string) * 2); 2080 current_substring = substrings; 2081 2082 { 2083 /* Now scan the string for %-specs and see what kinds of args they want. 2084 argclass[I] classifies the %-specs so we can give printf_filtered 2085 something of the right size. */ 2086 2087 enum argclass 2088 { 2089 int_arg, long_arg, long_long_arg, ptr_arg, 2090 string_arg, wide_string_arg, wide_char_arg, 2091 double_arg, long_double_arg, decfloat_arg 2092 }; 2093 enum argclass *argclass; 2094 enum argclass this_argclass; 2095 char *last_arg; 2096 int nargs_wanted; 2097 int i; 2098 2099 argclass = (enum argclass *) alloca (strlen (s) * sizeof *argclass); 2100 nargs_wanted = 0; 2101 f = string; 2102 last_arg = string; 2103 while (*f) 2104 if (*f++ == '%') 2105 { 2106 int seen_hash = 0, seen_zero = 0, lcount = 0, seen_prec = 0; 2107 int seen_space = 0, seen_plus = 0; 2108 int seen_big_l = 0, seen_h = 0, seen_big_h = 0; 2109 int seen_big_d = 0, seen_double_big_d = 0; 2110 int bad = 0; 2111 2112 /* Check the validity of the format specifier, and work 2113 out what argument it expects. We only accept C89 2114 format strings, with the exception of long long (which 2115 we autoconf for). */ 2116 2117 /* Skip over "%%". */ 2118 if (*f == '%') 2119 { 2120 f++; 2121 continue; 2122 } 2123 2124 /* The first part of a format specifier is a set of flag 2125 characters. */ 2126 while (strchr ("0-+ #", *f)) 2127 { 2128 if (*f == '#') 2129 seen_hash = 1; 2130 else if (*f == '0') 2131 seen_zero = 1; 2132 else if (*f == ' ') 2133 seen_space = 1; 2134 else if (*f == '+') 2135 seen_plus = 1; 2136 f++; 2137 } 2138 2139 /* The next part of a format specifier is a width. */ 2140 while (strchr ("0123456789", *f)) 2141 f++; 2142 2143 /* The next part of a format specifier is a precision. */ 2144 if (*f == '.') 2145 { 2146 seen_prec = 1; 2147 f++; 2148 while (strchr ("0123456789", *f)) 2149 f++; 2150 } 2151 2152 /* The next part of a format specifier is a length modifier. */ 2153 if (*f == 'h') 2154 { 2155 seen_h = 1; 2156 f++; 2157 } 2158 else if (*f == 'l') 2159 { 2160 f++; 2161 lcount++; 2162 if (*f == 'l') 2163 { 2164 f++; 2165 lcount++; 2166 } 2167 } 2168 else if (*f == 'L') 2169 { 2170 seen_big_l = 1; 2171 f++; 2172 } 2173 /* Decimal32 modifier. */ 2174 else if (*f == 'H') 2175 { 2176 seen_big_h = 1; 2177 f++; 2178 } 2179 /* Decimal64 and Decimal128 modifiers. */ 2180 else if (*f == 'D') 2181 { 2182 f++; 2183 2184 /* Check for a Decimal128. */ 2185 if (*f == 'D') 2186 { 2187 f++; 2188 seen_double_big_d = 1; 2189 } 2190 else 2191 seen_big_d = 1; 2192 } 2193 2194 switch (*f) 2195 { 2196 case 'u': 2197 if (seen_hash) 2198 bad = 1; 2199 /* FALLTHROUGH */ 2200 2201 case 'o': 2202 case 'x': 2203 case 'X': 2204 if (seen_space || seen_plus) 2205 bad = 1; 2206 /* FALLTHROUGH */ 2207 2208 case 'd': 2209 case 'i': 2210 if (lcount == 0) 2211 this_argclass = int_arg; 2212 else if (lcount == 1) 2213 this_argclass = long_arg; 2214 else 2215 this_argclass = long_long_arg; 2216 2217 if (seen_big_l) 2218 bad = 1; 2219 break; 2220 2221 case 'c': 2222 this_argclass = lcount == 0 ? int_arg : wide_char_arg; 2223 if (lcount > 1 || seen_h || seen_big_l) 2224 bad = 1; 2225 if (seen_prec || seen_zero || seen_space || seen_plus) 2226 bad = 1; 2227 break; 2228 2229 case 'p': 2230 this_argclass = ptr_arg; 2231 if (lcount || seen_h || seen_big_l) 2232 bad = 1; 2233 if (seen_prec || seen_zero || seen_space || seen_plus) 2234 bad = 1; 2235 break; 2236 2237 case 's': 2238 this_argclass = lcount == 0 ? string_arg : wide_string_arg; 2239 if (lcount > 1 || seen_h || seen_big_l) 2240 bad = 1; 2241 if (seen_zero || seen_space || seen_plus) 2242 bad = 1; 2243 break; 2244 2245 case 'e': 2246 case 'f': 2247 case 'g': 2248 case 'E': 2249 case 'G': 2250 if (seen_big_h || seen_big_d || seen_double_big_d) 2251 this_argclass = decfloat_arg; 2252 else if (seen_big_l) 2253 this_argclass = long_double_arg; 2254 else 2255 this_argclass = double_arg; 2256 2257 if (lcount || seen_h) 2258 bad = 1; 2259 break; 2260 2261 case '*': 2262 error (_("`*' not supported for precision or width in printf")); 2263 2264 case 'n': 2265 error (_("Format specifier `n' not supported in printf")); 2266 2267 case '\0': 2268 error (_("Incomplete format specifier at end of format string")); 2269 2270 default: 2271 error (_("Unrecognized format specifier '%c' in printf"), *f); 2272 } 2273 2274 if (bad) 2275 error (_("Inappropriate modifiers to " 2276 "format specifier '%c' in printf"), 2277 *f); 2278 2279 f++; 2280 2281 if (lcount > 1 && USE_PRINTF_I64) 2282 { 2283 /* Windows' printf does support long long, but not the usual way. 2284 Convert %lld to %I64d. */ 2285 int length_before_ll = f - last_arg - 1 - lcount; 2286 2287 strncpy (current_substring, last_arg, length_before_ll); 2288 strcpy (current_substring + length_before_ll, "I64"); 2289 current_substring[length_before_ll + 3] = 2290 last_arg[length_before_ll + lcount]; 2291 current_substring += length_before_ll + 4; 2292 } 2293 else if (this_argclass == wide_string_arg 2294 || this_argclass == wide_char_arg) 2295 { 2296 /* Convert %ls or %lc to %s. */ 2297 int length_before_ls = f - last_arg - 2; 2298 2299 strncpy (current_substring, last_arg, length_before_ls); 2300 strcpy (current_substring + length_before_ls, "s"); 2301 current_substring += length_before_ls + 2; 2302 } 2303 else 2304 { 2305 strncpy (current_substring, last_arg, f - last_arg); 2306 current_substring += f - last_arg; 2307 } 2308 *current_substring++ = '\0'; 2309 last_arg = f; 2310 argclass[nargs_wanted++] = this_argclass; 2311 } 2312 2313 /* Now, parse all arguments and evaluate them. 2314 Store the VALUEs in VAL_ARGS. */ 2315 2316 while (*s != '\0') 2317 { 2318 char *s1; 2319 2320 if (nargs == allocated_args) 2321 val_args = (struct value **) xrealloc ((char *) val_args, 2322 (allocated_args *= 2) 2323 * sizeof (struct value *)); 2324 s1 = s; 2325 val_args[nargs] = parse_to_comma_and_eval (&s1); 2326 2327 nargs++; 2328 s = s1; 2329 if (*s == ',') 2330 s++; 2331 } 2332 2333 if (nargs != nargs_wanted) 2334 error (_("Wrong number of arguments for specified format-string")); 2335 2336 /* Now actually print them. */ 2337 current_substring = substrings; 2338 for (i = 0; i < nargs; i++) 2339 { 2340 switch (argclass[i]) 2341 { 2342 case string_arg: 2343 { 2344 gdb_byte *str; 2345 CORE_ADDR tem; 2346 int j; 2347 2348 tem = value_as_address (val_args[i]); 2349 2350 /* This is a %s argument. Find the length of the string. */ 2351 for (j = 0;; j++) 2352 { 2353 gdb_byte c; 2354 2355 QUIT; 2356 read_memory (tem + j, &c, 1); 2357 if (c == 0) 2358 break; 2359 } 2360 2361 /* Copy the string contents into a string inside GDB. */ 2362 str = (gdb_byte *) alloca (j + 1); 2363 if (j != 0) 2364 read_memory (tem, str, j); 2365 str[j] = 0; 2366 2367 fprintf_filtered (stream, current_substring, (char *) str); 2368 } 2369 break; 2370 case wide_string_arg: 2371 { 2372 gdb_byte *str; 2373 CORE_ADDR tem; 2374 int j; 2375 struct gdbarch *gdbarch 2376 = get_type_arch (value_type (val_args[i])); 2377 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); 2378 struct type *wctype = lookup_typename (current_language, gdbarch, 2379 "wchar_t", NULL, 0); 2380 int wcwidth = TYPE_LENGTH (wctype); 2381 gdb_byte *buf = alloca (wcwidth); 2382 struct obstack output; 2383 struct cleanup *inner_cleanup; 2384 2385 tem = value_as_address (val_args[i]); 2386 2387 /* This is a %s argument. Find the length of the string. */ 2388 for (j = 0;; j += wcwidth) 2389 { 2390 QUIT; 2391 read_memory (tem + j, buf, wcwidth); 2392 if (extract_unsigned_integer (buf, wcwidth, byte_order) == 0) 2393 break; 2394 } 2395 2396 /* Copy the string contents into a string inside GDB. */ 2397 str = (gdb_byte *) alloca (j + wcwidth); 2398 if (j != 0) 2399 read_memory (tem, str, j); 2400 memset (&str[j], 0, wcwidth); 2401 2402 obstack_init (&output); 2403 inner_cleanup = make_cleanup_obstack_free (&output); 2404 2405 convert_between_encodings (target_wide_charset (gdbarch), 2406 host_charset (), 2407 str, j, wcwidth, 2408 &output, translit_char); 2409 obstack_grow_str0 (&output, ""); 2410 2411 fprintf_filtered (stream, current_substring, 2412 obstack_base (&output)); 2413 do_cleanups (inner_cleanup); 2414 } 2415 break; 2416 case wide_char_arg: 2417 { 2418 struct gdbarch *gdbarch 2419 = get_type_arch (value_type (val_args[i])); 2420 struct type *wctype = lookup_typename (current_language, gdbarch, 2421 "wchar_t", NULL, 0); 2422 struct type *valtype; 2423 struct obstack output; 2424 struct cleanup *inner_cleanup; 2425 const gdb_byte *bytes; 2426 2427 valtype = value_type (val_args[i]); 2428 if (TYPE_LENGTH (valtype) != TYPE_LENGTH (wctype) 2429 || TYPE_CODE (valtype) != TYPE_CODE_INT) 2430 error (_("expected wchar_t argument for %%lc")); 2431 2432 bytes = value_contents (val_args[i]); 2433 2434 obstack_init (&output); 2435 inner_cleanup = make_cleanup_obstack_free (&output); 2436 2437 convert_between_encodings (target_wide_charset (gdbarch), 2438 host_charset (), 2439 bytes, TYPE_LENGTH (valtype), 2440 TYPE_LENGTH (valtype), 2441 &output, translit_char); 2442 obstack_grow_str0 (&output, ""); 2443 2444 fprintf_filtered (stream, current_substring, 2445 obstack_base (&output)); 2446 do_cleanups (inner_cleanup); 2447 } 2448 break; 2449 case double_arg: 2450 { 2451 struct type *type = value_type (val_args[i]); 2452 DOUBLEST val; 2453 int inv; 2454 2455 /* If format string wants a float, unchecked-convert the value 2456 to floating point of the same size. */ 2457 type = float_type_from_length (type); 2458 val = unpack_double (type, value_contents (val_args[i]), &inv); 2459 if (inv) 2460 error (_("Invalid floating value found in program.")); 2461 2462 fprintf_filtered (stream, current_substring, (double) val); 2463 break; 2464 } 2465 case long_double_arg: 2466 #ifdef HAVE_LONG_DOUBLE 2467 { 2468 struct type *type = value_type (val_args[i]); 2469 DOUBLEST val; 2470 int inv; 2471 2472 /* If format string wants a float, unchecked-convert the value 2473 to floating point of the same size. */ 2474 type = float_type_from_length (type); 2475 val = unpack_double (type, value_contents (val_args[i]), &inv); 2476 if (inv) 2477 error (_("Invalid floating value found in program.")); 2478 2479 fprintf_filtered (stream, current_substring, 2480 (long double) val); 2481 break; 2482 } 2483 #else 2484 error (_("long double not supported in printf")); 2485 #endif 2486 case long_long_arg: 2487 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG) 2488 { 2489 long long val = value_as_long (val_args[i]); 2490 2491 fprintf_filtered (stream, current_substring, val); 2492 break; 2493 } 2494 #else 2495 error (_("long long not supported in printf")); 2496 #endif 2497 case int_arg: 2498 { 2499 int val = value_as_long (val_args[i]); 2500 2501 fprintf_filtered (stream, current_substring, val); 2502 break; 2503 } 2504 case long_arg: 2505 { 2506 long val = value_as_long (val_args[i]); 2507 2508 fprintf_filtered (stream, current_substring, val); 2509 break; 2510 } 2511 2512 /* Handles decimal floating values. */ 2513 case decfloat_arg: 2514 { 2515 const gdb_byte *param_ptr = value_contents (val_args[i]); 2516 2517 #if defined (PRINTF_HAS_DECFLOAT) 2518 /* If we have native support for Decimal floating 2519 printing, handle it here. */ 2520 fprintf_filtered (stream, current_substring, param_ptr); 2521 #else 2522 2523 /* As a workaround until vasprintf has native support for DFP 2524 we convert the DFP values to string and print them using 2525 the %s format specifier. */ 2526 2527 char *eos, *sos; 2528 int nnull_chars = 0; 2529 2530 /* Parameter data. */ 2531 struct type *param_type = value_type (val_args[i]); 2532 unsigned int param_len = TYPE_LENGTH (param_type); 2533 struct gdbarch *gdbarch = get_type_arch (param_type); 2534 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); 2535 2536 /* DFP output data. */ 2537 struct value *dfp_value = NULL; 2538 gdb_byte *dfp_ptr; 2539 int dfp_len = 16; 2540 gdb_byte dec[16]; 2541 struct type *dfp_type = NULL; 2542 char decstr[MAX_DECIMAL_STRING]; 2543 2544 /* Points to the end of the string so that we can go back 2545 and check for DFP length modifiers. */ 2546 eos = current_substring + strlen (current_substring); 2547 2548 /* Look for the float/double format specifier. */ 2549 while (*eos != 'f' && *eos != 'e' && *eos != 'E' 2550 && *eos != 'g' && *eos != 'G') 2551 eos--; 2552 2553 sos = eos; 2554 2555 /* Search for the '%' char and extract the size and type of 2556 the output decimal value based on its modifiers 2557 (%Hf, %Df, %DDf). */ 2558 while (*--sos != '%') 2559 { 2560 if (*sos == 'H') 2561 { 2562 dfp_len = 4; 2563 dfp_type = builtin_type (gdbarch)->builtin_decfloat; 2564 } 2565 else if (*sos == 'D' && *(sos - 1) == 'D') 2566 { 2567 dfp_len = 16; 2568 dfp_type = builtin_type (gdbarch)->builtin_declong; 2569 sos--; 2570 } 2571 else 2572 { 2573 dfp_len = 8; 2574 dfp_type = builtin_type (gdbarch)->builtin_decdouble; 2575 } 2576 } 2577 2578 /* Replace %Hf, %Df and %DDf with %s's. */ 2579 *++sos = 's'; 2580 2581 /* Go through the whole format string and pull the correct 2582 number of chars back to compensate for the change in the 2583 format specifier. */ 2584 while (nnull_chars < nargs - i) 2585 { 2586 if (*eos == '\0') 2587 nnull_chars++; 2588 2589 *++sos = *++eos; 2590 } 2591 2592 /* Conversion between different DFP types. */ 2593 if (TYPE_CODE (param_type) == TYPE_CODE_DECFLOAT) 2594 decimal_convert (param_ptr, param_len, byte_order, 2595 dec, dfp_len, byte_order); 2596 else 2597 /* If this is a non-trivial conversion, just output 0. 2598 A correct converted value can be displayed by explicitly 2599 casting to a DFP type. */ 2600 decimal_from_string (dec, dfp_len, byte_order, "0"); 2601 2602 dfp_value = value_from_decfloat (dfp_type, dec); 2603 2604 dfp_ptr = (gdb_byte *) value_contents (dfp_value); 2605 2606 decimal_to_string (dfp_ptr, dfp_len, byte_order, decstr); 2607 2608 /* Print the DFP value. */ 2609 fprintf_filtered (stream, current_substring, decstr); 2610 2611 break; 2612 #endif 2613 } 2614 2615 case ptr_arg: 2616 { 2617 /* We avoid the host's %p because pointers are too 2618 likely to be the wrong size. The only interesting 2619 modifier for %p is a width; extract that, and then 2620 handle %p as glibc would: %#x or a literal "(nil)". */ 2621 2622 char *p, *fmt, *fmt_p; 2623 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG) 2624 long long val = value_as_long (val_args[i]); 2625 #else 2626 long val = value_as_long (val_args[i]); 2627 #endif 2628 2629 fmt = alloca (strlen (current_substring) + 5); 2630 2631 /* Copy up to the leading %. */ 2632 p = current_substring; 2633 fmt_p = fmt; 2634 while (*p) 2635 { 2636 int is_percent = (*p == '%'); 2637 2638 *fmt_p++ = *p++; 2639 if (is_percent) 2640 { 2641 if (*p == '%') 2642 *fmt_p++ = *p++; 2643 else 2644 break; 2645 } 2646 } 2647 2648 if (val != 0) 2649 *fmt_p++ = '#'; 2650 2651 /* Copy any width. */ 2652 while (*p >= '0' && *p < '9') 2653 *fmt_p++ = *p++; 2654 2655 gdb_assert (*p == 'p' && *(p + 1) == '\0'); 2656 if (val != 0) 2657 { 2658 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG) 2659 *fmt_p++ = 'l'; 2660 #endif 2661 *fmt_p++ = 'l'; 2662 *fmt_p++ = 'x'; 2663 *fmt_p++ = '\0'; 2664 fprintf_filtered (stream, fmt, val); 2665 } 2666 else 2667 { 2668 *fmt_p++ = 's'; 2669 *fmt_p++ = '\0'; 2670 fprintf_filtered (stream, fmt, "(nil)"); 2671 } 2672 2673 break; 2674 } 2675 default: 2676 internal_error (__FILE__, __LINE__, 2677 _("failed internal consistency check")); 2678 } 2679 /* Skip to the next substring. */ 2680 current_substring += strlen (current_substring) + 1; 2681 } 2682 /* Print the portion of the format string after the last argument. 2683 Note that this will not include any ordinary %-specs, but it 2684 might include "%%". That is why we use printf_filtered and not 2685 puts_filtered here. Also, we pass a dummy argument because 2686 some platforms have modified GCC to include -Wformat-security 2687 by default, which will warn here if there is no argument. */ 2688 fprintf_filtered (stream, last_arg, 0); 2689 } 2690 do_cleanups (old_cleanups); 2691 } 2692 2693 /* Implement the "printf" command. */ 2694 2695 static void 2696 printf_command (char *arg, int from_tty) 2697 { 2698 ui_printf (arg, gdb_stdout); 2699 } 2700 2701 /* Implement the "eval" command. */ 2702 2703 static void 2704 eval_command (char *arg, int from_tty) 2705 { 2706 struct ui_file *ui_out = mem_fileopen (); 2707 struct cleanup *cleanups = make_cleanup_ui_file_delete (ui_out); 2708 char *expanded; 2709 2710 ui_printf (arg, ui_out); 2711 2712 expanded = ui_file_xstrdup (ui_out, NULL); 2713 make_cleanup (xfree, expanded); 2714 2715 execute_command (expanded, from_tty); 2716 2717 do_cleanups (cleanups); 2718 } 2719 2720 void 2721 _initialize_printcmd (void) 2722 { 2723 struct cmd_list_element *c; 2724 2725 current_display_number = -1; 2726 2727 observer_attach_solib_unloaded (clear_dangling_display_expressions); 2728 2729 add_info ("address", address_info, 2730 _("Describe where symbol SYM is stored.")); 2731 2732 add_info ("symbol", sym_info, _("\ 2733 Describe what symbol is at location ADDR.\n\ 2734 Only for symbols with fixed locations (global or static scope).")); 2735 2736 add_com ("x", class_vars, x_command, _("\ 2737 Examine memory: x/FMT ADDRESS.\n\ 2738 ADDRESS is an expression for the memory address to examine.\n\ 2739 FMT is a repeat count followed by a format letter and a size letter.\n\ 2740 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\ 2741 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\ 2742 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\ 2743 The specified number of objects of the specified size are printed\n\ 2744 according to the format.\n\n\ 2745 Defaults for format and size letters are those previously used.\n\ 2746 Default count is 1. Default address is following last thing printed\n\ 2747 with this command or \"print\".")); 2748 2749 #if 0 2750 add_com ("whereis", class_vars, whereis_command, 2751 _("Print line number and file of definition of variable.")); 2752 #endif 2753 2754 add_info ("display", display_info, _("\ 2755 Expressions to display when program stops, with code numbers.")); 2756 2757 add_cmd ("undisplay", class_vars, undisplay_command, _("\ 2758 Cancel some expressions to be displayed when program stops.\n\ 2759 Arguments are the code numbers of the expressions to stop displaying.\n\ 2760 No argument means cancel all automatic-display expressions.\n\ 2761 \"delete display\" has the same effect as this command.\n\ 2762 Do \"info display\" to see current list of code numbers."), 2763 &cmdlist); 2764 2765 add_com ("display", class_vars, display_command, _("\ 2766 Print value of expression EXP each time the program stops.\n\ 2767 /FMT may be used before EXP as in the \"print\" command.\n\ 2768 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\ 2769 as in the \"x\" command, and then EXP is used to get the address to examine\n\ 2770 and examining is done as in the \"x\" command.\n\n\ 2771 With no argument, display all currently requested auto-display expressions.\n\ 2772 Use \"undisplay\" to cancel display requests previously made.")); 2773 2774 add_cmd ("display", class_vars, enable_display_command, _("\ 2775 Enable some expressions to be displayed when program stops.\n\ 2776 Arguments are the code numbers of the expressions to resume displaying.\n\ 2777 No argument means enable all automatic-display expressions.\n\ 2778 Do \"info display\" to see current list of code numbers."), &enablelist); 2779 2780 add_cmd ("display", class_vars, disable_display_command, _("\ 2781 Disable some expressions to be displayed when program stops.\n\ 2782 Arguments are the code numbers of the expressions to stop displaying.\n\ 2783 No argument means disable all automatic-display expressions.\n\ 2784 Do \"info display\" to see current list of code numbers."), &disablelist); 2785 2786 add_cmd ("display", class_vars, undisplay_command, _("\ 2787 Cancel some expressions to be displayed when program stops.\n\ 2788 Arguments are the code numbers of the expressions to stop displaying.\n\ 2789 No argument means cancel all automatic-display expressions.\n\ 2790 Do \"info display\" to see current list of code numbers."), &deletelist); 2791 2792 add_com ("printf", class_vars, printf_command, _("\ 2793 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\ 2794 This is useful for formatted output in user-defined commands.")); 2795 2796 add_com ("output", class_vars, output_command, _("\ 2797 Like \"print\" but don't put in value history and don't print newline.\n\ 2798 This is useful in user-defined commands.")); 2799 2800 add_prefix_cmd ("set", class_vars, set_command, _("\ 2801 Evaluate expression EXP and assign result to variable VAR, using assignment\n\ 2802 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ 2803 example). VAR may be a debugger \"convenience\" variable (names starting\n\ 2804 with $), a register (a few standard names starting with $), or an actual\n\ 2805 variable in the program being debugged. EXP is any valid expression.\n\ 2806 Use \"set variable\" for variables with names identical to set subcommands.\n\ 2807 \n\ 2808 With a subcommand, this command modifies parts of the gdb environment.\n\ 2809 You can see these environment settings with the \"show\" command."), 2810 &setlist, "set ", 1, &cmdlist); 2811 if (dbx_commands) 2812 add_com ("assign", class_vars, set_command, _("\ 2813 Evaluate expression EXP and assign result to variable VAR, using assignment\n\ 2814 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ 2815 example). VAR may be a debugger \"convenience\" variable (names starting\n\ 2816 with $), a register (a few standard names starting with $), or an actual\n\ 2817 variable in the program being debugged. EXP is any valid expression.\n\ 2818 Use \"set variable\" for variables with names identical to set subcommands.\n\ 2819 \nWith a subcommand, this command modifies parts of the gdb environment.\n\ 2820 You can see these environment settings with the \"show\" command.")); 2821 2822 /* "call" is the same as "set", but handy for dbx users to call fns. */ 2823 c = add_com ("call", class_vars, call_command, _("\ 2824 Call a function in the program.\n\ 2825 The argument is the function name and arguments, in the notation of the\n\ 2826 current working language. The result is printed and saved in the value\n\ 2827 history, if it is not void.")); 2828 set_cmd_completer (c, expression_completer); 2829 2830 add_cmd ("variable", class_vars, set_command, _("\ 2831 Evaluate expression EXP and assign result to variable VAR, using assignment\n\ 2832 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ 2833 example). VAR may be a debugger \"convenience\" variable (names starting\n\ 2834 with $), a register (a few standard names starting with $), or an actual\n\ 2835 variable in the program being debugged. EXP is any valid expression.\n\ 2836 This may usually be abbreviated to simply \"set\"."), 2837 &setlist); 2838 2839 c = add_com ("print", class_vars, print_command, _("\ 2840 Print value of expression EXP.\n\ 2841 Variables accessible are those of the lexical environment of the selected\n\ 2842 stack frame, plus all those whose scope is global or an entire file.\n\ 2843 \n\ 2844 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\ 2845 $$NUM refers to NUM'th value back from the last one.\n\ 2846 Names starting with $ refer to registers (with the values they would have\n\ 2847 if the program were to return to the stack frame now selected, restoring\n\ 2848 all registers saved by frames farther in) or else to debugger\n\ 2849 \"convenience\" variables (any such name not a known register).\n\ 2850 Use assignment expressions to give values to convenience variables.\n\ 2851 \n\ 2852 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\ 2853 @ is a binary operator for treating consecutive data objects\n\ 2854 anywhere in memory as an array. FOO@NUM gives an array whose first\n\ 2855 element is FOO, whose second element is stored in the space following\n\ 2856 where FOO is stored, etc. FOO must be an expression whose value\n\ 2857 resides in memory.\n\ 2858 \n\ 2859 EXP may be preceded with /FMT, where FMT is a format letter\n\ 2860 but no count or size letter (see \"x\" command).")); 2861 set_cmd_completer (c, expression_completer); 2862 add_com_alias ("p", "print", class_vars, 1); 2863 2864 c = add_com ("inspect", class_vars, inspect_command, _("\ 2865 Same as \"print\" command, except that if you are running in the epoch\n\ 2866 environment, the value is printed in its own window.")); 2867 set_cmd_completer (c, expression_completer); 2868 2869 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class, 2870 &max_symbolic_offset, _("\ 2871 Set the largest offset that will be printed in <symbol+1234> form."), _("\ 2872 Show the largest offset that will be printed in <symbol+1234> form."), NULL, 2873 NULL, 2874 show_max_symbolic_offset, 2875 &setprintlist, &showprintlist); 2876 add_setshow_boolean_cmd ("symbol-filename", no_class, 2877 &print_symbol_filename, _("\ 2878 Set printing of source filename and line number with <symbol>."), _("\ 2879 Show printing of source filename and line number with <symbol>."), NULL, 2880 NULL, 2881 show_print_symbol_filename, 2882 &setprintlist, &showprintlist); 2883 2884 add_com ("eval", no_class, eval_command, _("\ 2885 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\ 2886 a command line, and call it.")); 2887 } 2888