1 /* Print values for GNU debugger GDB. 2 3 Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 4 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 5 2008, 2009, 2010, 2011 Free Software Foundation, Inc. 6 7 This file is part of GDB. 8 9 This program is free software; you can redistribute it and/or modify 10 it under the terms of the GNU General Public License as published by 11 the Free Software Foundation; either version 3 of the License, or 12 (at your option) any later version. 13 14 This program is distributed in the hope that it will be useful, 15 but WITHOUT ANY WARRANTY; without even the implied warranty of 16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 GNU General Public License for more details. 18 19 You should have received a copy of the GNU General Public License 20 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 21 22 #include "defs.h" 23 #include "gdb_string.h" 24 #include "frame.h" 25 #include "symtab.h" 26 #include "gdbtypes.h" 27 #include "value.h" 28 #include "language.h" 29 #include "expression.h" 30 #include "gdbcore.h" 31 #include "gdbcmd.h" 32 #include "target.h" 33 #include "breakpoint.h" 34 #include "demangle.h" 35 #include "valprint.h" 36 #include "annotate.h" 37 #include "symfile.h" /* for overlay functions */ 38 #include "objfiles.h" /* ditto */ 39 #include "completer.h" /* for completion functions */ 40 #include "ui-out.h" 41 #include "gdb_assert.h" 42 #include "block.h" 43 #include "disasm.h" 44 #include "dfp.h" 45 #include "valprint.h" 46 #include "exceptions.h" 47 #include "observer.h" 48 #include "solist.h" 49 #include "parser-defs.h" 50 #include "charset.h" 51 #include "arch-utils.h" 52 #include "cli/cli-utils.h" 53 54 #ifdef TUI 55 #include "tui/tui.h" /* For tui_active et al. */ 56 #endif 57 58 #if defined(__MINGW32__) && !defined(PRINTF_HAS_LONG_LONG) 59 # define USE_PRINTF_I64 1 60 # define PRINTF_HAS_LONG_LONG 61 #else 62 # define USE_PRINTF_I64 0 63 #endif 64 65 extern int asm_demangle; /* Whether to demangle syms in asm 66 printouts. */ 67 68 struct format_data 69 { 70 int count; 71 char format; 72 char size; 73 74 /* True if the value should be printed raw -- that is, bypassing 75 python-based formatters. */ 76 unsigned char raw; 77 }; 78 79 /* Last specified output format. */ 80 81 static char last_format = 0; 82 83 /* Last specified examination size. 'b', 'h', 'w' or `q'. */ 84 85 static char last_size = 'w'; 86 87 /* Default address to examine next, and associated architecture. */ 88 89 static struct gdbarch *next_gdbarch; 90 static CORE_ADDR next_address; 91 92 /* Number of delay instructions following current disassembled insn. */ 93 94 static int branch_delay_insns; 95 96 /* Last address examined. */ 97 98 static CORE_ADDR last_examine_address; 99 100 /* Contents of last address examined. 101 This is not valid past the end of the `x' command! */ 102 103 static struct value *last_examine_value; 104 105 /* Largest offset between a symbolic value and an address, that will be 106 printed as `0x1234 <symbol+offset>'. */ 107 108 static unsigned int max_symbolic_offset = UINT_MAX; 109 static void 110 show_max_symbolic_offset (struct ui_file *file, int from_tty, 111 struct cmd_list_element *c, const char *value) 112 { 113 fprintf_filtered (file, 114 _("The largest offset that will be " 115 "printed in <symbol+1234> form is %s.\n"), 116 value); 117 } 118 119 /* Append the source filename and linenumber of the symbol when 120 printing a symbolic value as `<symbol at filename:linenum>' if set. */ 121 static int print_symbol_filename = 0; 122 static void 123 show_print_symbol_filename (struct ui_file *file, int from_tty, 124 struct cmd_list_element *c, const char *value) 125 { 126 fprintf_filtered (file, _("Printing of source filename and " 127 "line number with <symbol> is %s.\n"), 128 value); 129 } 130 131 /* Number of auto-display expression currently being displayed. 132 So that we can disable it if we get an error or a signal within it. 133 -1 when not doing one. */ 134 135 int current_display_number; 136 137 struct display 138 { 139 /* Chain link to next auto-display item. */ 140 struct display *next; 141 142 /* The expression as the user typed it. */ 143 char *exp_string; 144 145 /* Expression to be evaluated and displayed. */ 146 struct expression *exp; 147 148 /* Item number of this auto-display item. */ 149 int number; 150 151 /* Display format specified. */ 152 struct format_data format; 153 154 /* Program space associated with `block'. */ 155 struct program_space *pspace; 156 157 /* Innermost block required by this expression when evaluated. */ 158 struct block *block; 159 160 /* Status of this display (enabled or disabled). */ 161 int enabled_p; 162 }; 163 164 /* Chain of expressions whose values should be displayed 165 automatically each time the program stops. */ 166 167 static struct display *display_chain; 168 169 static int display_number; 170 171 /* Walk the following statement or block through all displays. 172 ALL_DISPLAYS_SAFE does so even if the statement deletes the current 173 display. */ 174 175 #define ALL_DISPLAYS(B) \ 176 for (B = display_chain; B; B = B->next) 177 178 #define ALL_DISPLAYS_SAFE(B,TMP) \ 179 for (B = display_chain; \ 180 B ? (TMP = B->next, 1): 0; \ 181 B = TMP) 182 183 /* Prototypes for exported functions. */ 184 185 void output_command (char *, int); 186 187 void _initialize_printcmd (void); 188 189 /* Prototypes for local functions. */ 190 191 static void do_one_display (struct display *); 192 193 194 /* Decode a format specification. *STRING_PTR should point to it. 195 OFORMAT and OSIZE are used as defaults for the format and size 196 if none are given in the format specification. 197 If OSIZE is zero, then the size field of the returned value 198 should be set only if a size is explicitly specified by the 199 user. 200 The structure returned describes all the data 201 found in the specification. In addition, *STRING_PTR is advanced 202 past the specification and past all whitespace following it. */ 203 204 static struct format_data 205 decode_format (char **string_ptr, int oformat, int osize) 206 { 207 struct format_data val; 208 char *p = *string_ptr; 209 210 val.format = '?'; 211 val.size = '?'; 212 val.count = 1; 213 val.raw = 0; 214 215 if (*p >= '0' && *p <= '9') 216 val.count = atoi (p); 217 while (*p >= '0' && *p <= '9') 218 p++; 219 220 /* Now process size or format letters that follow. */ 221 222 while (1) 223 { 224 if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g') 225 val.size = *p++; 226 else if (*p == 'r') 227 { 228 val.raw = 1; 229 p++; 230 } 231 else if (*p >= 'a' && *p <= 'z') 232 val.format = *p++; 233 else 234 break; 235 } 236 237 while (*p == ' ' || *p == '\t') 238 p++; 239 *string_ptr = p; 240 241 /* Set defaults for format and size if not specified. */ 242 if (val.format == '?') 243 { 244 if (val.size == '?') 245 { 246 /* Neither has been specified. */ 247 val.format = oformat; 248 val.size = osize; 249 } 250 else 251 /* If a size is specified, any format makes a reasonable 252 default except 'i'. */ 253 val.format = oformat == 'i' ? 'x' : oformat; 254 } 255 else if (val.size == '?') 256 switch (val.format) 257 { 258 case 'a': 259 /* Pick the appropriate size for an address. This is deferred 260 until do_examine when we know the actual architecture to use. 261 A special size value of 'a' is used to indicate this case. */ 262 val.size = osize ? 'a' : osize; 263 break; 264 case 'f': 265 /* Floating point has to be word or giantword. */ 266 if (osize == 'w' || osize == 'g') 267 val.size = osize; 268 else 269 /* Default it to giantword if the last used size is not 270 appropriate. */ 271 val.size = osize ? 'g' : osize; 272 break; 273 case 'c': 274 /* Characters default to one byte. */ 275 val.size = osize ? 'b' : osize; 276 break; 277 case 's': 278 /* Display strings with byte size chars unless explicitly 279 specified. */ 280 val.size = '\0'; 281 break; 282 283 default: 284 /* The default is the size most recently specified. */ 285 val.size = osize; 286 } 287 288 return val; 289 } 290 291 /* Print value VAL on stream according to OPTIONS. 292 Do not end with a newline. 293 SIZE is the letter for the size of datum being printed. 294 This is used to pad hex numbers so they line up. SIZE is 0 295 for print / output and set for examine. */ 296 297 static void 298 print_formatted (struct value *val, int size, 299 const struct value_print_options *options, 300 struct ui_file *stream) 301 { 302 struct type *type = check_typedef (value_type (val)); 303 int len = TYPE_LENGTH (type); 304 305 if (VALUE_LVAL (val) == lval_memory) 306 next_address = value_address (val) + len; 307 308 if (size) 309 { 310 switch (options->format) 311 { 312 case 's': 313 { 314 struct type *elttype = value_type (val); 315 316 next_address = (value_address (val) 317 + val_print_string (elttype, NULL, 318 value_address (val), -1, 319 stream, options) * len); 320 } 321 return; 322 323 case 'i': 324 /* We often wrap here if there are long symbolic names. */ 325 wrap_here (" "); 326 next_address = (value_address (val) 327 + gdb_print_insn (get_type_arch (type), 328 value_address (val), stream, 329 &branch_delay_insns)); 330 return; 331 } 332 } 333 334 if (options->format == 0 || options->format == 's' 335 || TYPE_CODE (type) == TYPE_CODE_REF 336 || TYPE_CODE (type) == TYPE_CODE_ARRAY 337 || TYPE_CODE (type) == TYPE_CODE_STRING 338 || TYPE_CODE (type) == TYPE_CODE_STRUCT 339 || TYPE_CODE (type) == TYPE_CODE_UNION 340 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE) 341 value_print (val, stream, options); 342 else 343 /* User specified format, so don't look to the type to tell us 344 what to do. */ 345 val_print_scalar_formatted (type, 346 value_contents_for_printing (val), 347 value_embedded_offset (val), 348 val, 349 options, size, stream); 350 } 351 352 /* Return builtin floating point type of same length as TYPE. 353 If no such type is found, return TYPE itself. */ 354 static struct type * 355 float_type_from_length (struct type *type) 356 { 357 struct gdbarch *gdbarch = get_type_arch (type); 358 const struct builtin_type *builtin = builtin_type (gdbarch); 359 unsigned int len = TYPE_LENGTH (type); 360 361 if (len == TYPE_LENGTH (builtin->builtin_float)) 362 type = builtin->builtin_float; 363 else if (len == TYPE_LENGTH (builtin->builtin_double)) 364 type = builtin->builtin_double; 365 else if (len == TYPE_LENGTH (builtin->builtin_long_double)) 366 type = builtin->builtin_long_double; 367 368 return type; 369 } 370 371 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR, 372 according to OPTIONS and SIZE on STREAM. Formats s and i are not 373 supported at this level. */ 374 375 void 376 print_scalar_formatted (const void *valaddr, struct type *type, 377 const struct value_print_options *options, 378 int size, struct ui_file *stream) 379 { 380 struct gdbarch *gdbarch = get_type_arch (type); 381 LONGEST val_long = 0; 382 unsigned int len = TYPE_LENGTH (type); 383 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); 384 385 /* String printing should go through val_print_scalar_formatted. */ 386 gdb_assert (options->format != 's'); 387 388 if (len > sizeof(LONGEST) && 389 (TYPE_CODE (type) == TYPE_CODE_INT 390 || TYPE_CODE (type) == TYPE_CODE_ENUM)) 391 { 392 switch (options->format) 393 { 394 case 'o': 395 print_octal_chars (stream, valaddr, len, byte_order); 396 return; 397 case 'u': 398 case 'd': 399 print_decimal_chars (stream, valaddr, len, byte_order); 400 return; 401 case 't': 402 print_binary_chars (stream, valaddr, len, byte_order); 403 return; 404 case 'x': 405 print_hex_chars (stream, valaddr, len, byte_order); 406 return; 407 case 'c': 408 print_char_chars (stream, type, valaddr, len, byte_order); 409 return; 410 default: 411 break; 412 }; 413 } 414 415 if (options->format != 'f') 416 val_long = unpack_long (type, valaddr); 417 418 /* If the value is a pointer, and pointers and addresses are not the 419 same, then at this point, the value's length (in target bytes) is 420 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */ 421 if (TYPE_CODE (type) == TYPE_CODE_PTR) 422 len = gdbarch_addr_bit (gdbarch) / TARGET_CHAR_BIT; 423 424 /* If we are printing it as unsigned, truncate it in case it is actually 425 a negative signed value (e.g. "print/u (short)-1" should print 65535 426 (if shorts are 16 bits) instead of 4294967295). */ 427 if (options->format != 'd' || TYPE_UNSIGNED (type)) 428 { 429 if (len < sizeof (LONGEST)) 430 val_long &= ((LONGEST) 1 << HOST_CHAR_BIT * len) - 1; 431 } 432 433 switch (options->format) 434 { 435 case 'x': 436 if (!size) 437 { 438 /* No size specified, like in print. Print varying # of digits. */ 439 print_longest (stream, 'x', 1, val_long); 440 } 441 else 442 switch (size) 443 { 444 case 'b': 445 case 'h': 446 case 'w': 447 case 'g': 448 print_longest (stream, size, 1, val_long); 449 break; 450 default: 451 error (_("Undefined output size \"%c\"."), size); 452 } 453 break; 454 455 case 'd': 456 print_longest (stream, 'd', 1, val_long); 457 break; 458 459 case 'u': 460 print_longest (stream, 'u', 0, val_long); 461 break; 462 463 case 'o': 464 if (val_long) 465 print_longest (stream, 'o', 1, val_long); 466 else 467 fprintf_filtered (stream, "0"); 468 break; 469 470 case 'a': 471 { 472 CORE_ADDR addr = unpack_pointer (type, valaddr); 473 474 print_address (gdbarch, addr, stream); 475 } 476 break; 477 478 case 'c': 479 { 480 struct value_print_options opts = *options; 481 482 opts.format = 0; 483 if (TYPE_UNSIGNED (type)) 484 type = builtin_type (gdbarch)->builtin_true_unsigned_char; 485 else 486 type = builtin_type (gdbarch)->builtin_true_char; 487 488 value_print (value_from_longest (type, val_long), stream, &opts); 489 } 490 break; 491 492 case 'f': 493 type = float_type_from_length (type); 494 print_floating (valaddr, type, stream); 495 break; 496 497 case 0: 498 internal_error (__FILE__, __LINE__, 499 _("failed internal consistency check")); 500 501 case 't': 502 /* Binary; 't' stands for "two". */ 503 { 504 char bits[8 * (sizeof val_long) + 1]; 505 char buf[8 * (sizeof val_long) + 32]; 506 char *cp = bits; 507 int width; 508 509 if (!size) 510 width = 8 * (sizeof val_long); 511 else 512 switch (size) 513 { 514 case 'b': 515 width = 8; 516 break; 517 case 'h': 518 width = 16; 519 break; 520 case 'w': 521 width = 32; 522 break; 523 case 'g': 524 width = 64; 525 break; 526 default: 527 error (_("Undefined output size \"%c\"."), size); 528 } 529 530 bits[width] = '\0'; 531 while (width-- > 0) 532 { 533 bits[width] = (val_long & 1) ? '1' : '0'; 534 val_long >>= 1; 535 } 536 if (!size) 537 { 538 while (*cp && *cp == '0') 539 cp++; 540 if (*cp == '\0') 541 cp--; 542 } 543 strncpy (buf, cp, sizeof (bits)); 544 fputs_filtered (buf, stream); 545 } 546 break; 547 548 default: 549 error (_("Undefined output format \"%c\"."), options->format); 550 } 551 } 552 553 /* Specify default address for `x' command. 554 The `info lines' command uses this. */ 555 556 void 557 set_next_address (struct gdbarch *gdbarch, CORE_ADDR addr) 558 { 559 struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr; 560 561 next_gdbarch = gdbarch; 562 next_address = addr; 563 564 /* Make address available to the user as $_. */ 565 set_internalvar (lookup_internalvar ("_"), 566 value_from_pointer (ptr_type, addr)); 567 } 568 569 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM, 570 after LEADIN. Print nothing if no symbolic name is found nearby. 571 Optionally also print source file and line number, if available. 572 DO_DEMANGLE controls whether to print a symbol in its native "raw" form, 573 or to interpret it as a possible C++ name and convert it back to source 574 form. However note that DO_DEMANGLE can be overridden by the specific 575 settings of the demangle and asm_demangle variables. */ 576 577 void 578 print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr, 579 struct ui_file *stream, 580 int do_demangle, char *leadin) 581 { 582 char *name = NULL; 583 char *filename = NULL; 584 int unmapped = 0; 585 int offset = 0; 586 int line = 0; 587 588 /* Throw away both name and filename. */ 589 struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &name); 590 make_cleanup (free_current_contents, &filename); 591 592 if (build_address_symbolic (gdbarch, addr, do_demangle, &name, &offset, 593 &filename, &line, &unmapped)) 594 { 595 do_cleanups (cleanup_chain); 596 return; 597 } 598 599 fputs_filtered (leadin, stream); 600 if (unmapped) 601 fputs_filtered ("<*", stream); 602 else 603 fputs_filtered ("<", stream); 604 fputs_filtered (name, stream); 605 if (offset != 0) 606 fprintf_filtered (stream, "+%u", (unsigned int) offset); 607 608 /* Append source filename and line number if desired. Give specific 609 line # of this addr, if we have it; else line # of the nearest symbol. */ 610 if (print_symbol_filename && filename != NULL) 611 { 612 if (line != -1) 613 fprintf_filtered (stream, " at %s:%d", filename, line); 614 else 615 fprintf_filtered (stream, " in %s", filename); 616 } 617 if (unmapped) 618 fputs_filtered ("*>", stream); 619 else 620 fputs_filtered (">", stream); 621 622 do_cleanups (cleanup_chain); 623 } 624 625 /* Given an address ADDR return all the elements needed to print the 626 address in a symbolic form. NAME can be mangled or not depending 627 on DO_DEMANGLE (and also on the asm_demangle global variable, 628 manipulated via ''set print asm-demangle''). Return 0 in case of 629 success, when all the info in the OUT paramters is valid. Return 1 630 otherwise. */ 631 int 632 build_address_symbolic (struct gdbarch *gdbarch, 633 CORE_ADDR addr, /* IN */ 634 int do_demangle, /* IN */ 635 char **name, /* OUT */ 636 int *offset, /* OUT */ 637 char **filename, /* OUT */ 638 int *line, /* OUT */ 639 int *unmapped) /* OUT */ 640 { 641 struct minimal_symbol *msymbol; 642 struct symbol *symbol; 643 CORE_ADDR name_location = 0; 644 struct obj_section *section = NULL; 645 char *name_temp = ""; 646 647 /* Let's say it is mapped (not unmapped). */ 648 *unmapped = 0; 649 650 /* Determine if the address is in an overlay, and whether it is 651 mapped. */ 652 if (overlay_debugging) 653 { 654 section = find_pc_overlay (addr); 655 if (pc_in_unmapped_range (addr, section)) 656 { 657 *unmapped = 1; 658 addr = overlay_mapped_address (addr, section); 659 } 660 } 661 662 /* First try to find the address in the symbol table, then 663 in the minsyms. Take the closest one. */ 664 665 /* This is defective in the sense that it only finds text symbols. So 666 really this is kind of pointless--we should make sure that the 667 minimal symbols have everything we need (by changing that we could 668 save some memory, but for many debug format--ELF/DWARF or 669 anything/stabs--it would be inconvenient to eliminate those minimal 670 symbols anyway). */ 671 msymbol = lookup_minimal_symbol_by_pc_section (addr, section); 672 symbol = find_pc_sect_function (addr, section); 673 674 if (symbol) 675 { 676 /* If this is a function (i.e. a code address), strip out any 677 non-address bits. For instance, display a pointer to the 678 first instruction of a Thumb function as <function>; the 679 second instruction will be <function+2>, even though the 680 pointer is <function+3>. This matches the ISA behavior. */ 681 addr = gdbarch_addr_bits_remove (gdbarch, addr); 682 683 name_location = BLOCK_START (SYMBOL_BLOCK_VALUE (symbol)); 684 if (do_demangle || asm_demangle) 685 name_temp = SYMBOL_PRINT_NAME (symbol); 686 else 687 name_temp = SYMBOL_LINKAGE_NAME (symbol); 688 } 689 690 if (msymbol != NULL) 691 { 692 if (SYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL) 693 { 694 /* The msymbol is closer to the address than the symbol; 695 use the msymbol instead. */ 696 symbol = 0; 697 name_location = SYMBOL_VALUE_ADDRESS (msymbol); 698 if (do_demangle || asm_demangle) 699 name_temp = SYMBOL_PRINT_NAME (msymbol); 700 else 701 name_temp = SYMBOL_LINKAGE_NAME (msymbol); 702 } 703 } 704 if (symbol == NULL && msymbol == NULL) 705 return 1; 706 707 /* If the nearest symbol is too far away, don't print anything symbolic. */ 708 709 /* For when CORE_ADDR is larger than unsigned int, we do math in 710 CORE_ADDR. But when we detect unsigned wraparound in the 711 CORE_ADDR math, we ignore this test and print the offset, 712 because addr+max_symbolic_offset has wrapped through the end 713 of the address space back to the beginning, giving bogus comparison. */ 714 if (addr > name_location + max_symbolic_offset 715 && name_location + max_symbolic_offset > name_location) 716 return 1; 717 718 *offset = addr - name_location; 719 720 *name = xstrdup (name_temp); 721 722 if (print_symbol_filename) 723 { 724 struct symtab_and_line sal; 725 726 sal = find_pc_sect_line (addr, section, 0); 727 728 if (sal.symtab) 729 { 730 *filename = xstrdup (sal.symtab->filename); 731 *line = sal.line; 732 } 733 } 734 return 0; 735 } 736 737 738 /* Print address ADDR symbolically on STREAM. 739 First print it as a number. Then perhaps print 740 <SYMBOL + OFFSET> after the number. */ 741 742 void 743 print_address (struct gdbarch *gdbarch, 744 CORE_ADDR addr, struct ui_file *stream) 745 { 746 fputs_filtered (paddress (gdbarch, addr), stream); 747 print_address_symbolic (gdbarch, addr, stream, asm_demangle, " "); 748 } 749 750 /* Return a prefix for instruction address: 751 "=> " for current instruction, else " ". */ 752 753 const char * 754 pc_prefix (CORE_ADDR addr) 755 { 756 if (has_stack_frames ()) 757 { 758 struct frame_info *frame; 759 CORE_ADDR pc; 760 761 frame = get_selected_frame (NULL); 762 if (get_frame_pc_if_available (frame, &pc) && pc == addr) 763 return "=> "; 764 } 765 return " "; 766 } 767 768 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE 769 controls whether to print the symbolic name "raw" or demangled. 770 Global setting "addressprint" controls whether to print hex address 771 or not. */ 772 773 void 774 print_address_demangle (struct gdbarch *gdbarch, CORE_ADDR addr, 775 struct ui_file *stream, int do_demangle) 776 { 777 struct value_print_options opts; 778 779 get_user_print_options (&opts); 780 if (addr == 0) 781 { 782 fprintf_filtered (stream, "0"); 783 } 784 else if (opts.addressprint) 785 { 786 fputs_filtered (paddress (gdbarch, addr), stream); 787 print_address_symbolic (gdbarch, addr, stream, do_demangle, " "); 788 } 789 else 790 { 791 print_address_symbolic (gdbarch, addr, stream, do_demangle, ""); 792 } 793 } 794 795 796 /* Examine data at address ADDR in format FMT. 797 Fetch it from memory and print on gdb_stdout. */ 798 799 static void 800 do_examine (struct format_data fmt, struct gdbarch *gdbarch, CORE_ADDR addr) 801 { 802 char format = 0; 803 char size; 804 int count = 1; 805 struct type *val_type = NULL; 806 int i; 807 int maxelts; 808 struct value_print_options opts; 809 810 format = fmt.format; 811 size = fmt.size; 812 count = fmt.count; 813 next_gdbarch = gdbarch; 814 next_address = addr; 815 816 /* Instruction format implies fetch single bytes 817 regardless of the specified size. 818 The case of strings is handled in decode_format, only explicit 819 size operator are not changed to 'b'. */ 820 if (format == 'i') 821 size = 'b'; 822 823 if (size == 'a') 824 { 825 /* Pick the appropriate size for an address. */ 826 if (gdbarch_ptr_bit (next_gdbarch) == 64) 827 size = 'g'; 828 else if (gdbarch_ptr_bit (next_gdbarch) == 32) 829 size = 'w'; 830 else if (gdbarch_ptr_bit (next_gdbarch) == 16) 831 size = 'h'; 832 else 833 /* Bad value for gdbarch_ptr_bit. */ 834 internal_error (__FILE__, __LINE__, 835 _("failed internal consistency check")); 836 } 837 838 if (size == 'b') 839 val_type = builtin_type (next_gdbarch)->builtin_int8; 840 else if (size == 'h') 841 val_type = builtin_type (next_gdbarch)->builtin_int16; 842 else if (size == 'w') 843 val_type = builtin_type (next_gdbarch)->builtin_int32; 844 else if (size == 'g') 845 val_type = builtin_type (next_gdbarch)->builtin_int64; 846 847 if (format == 's') 848 { 849 struct type *char_type = NULL; 850 851 /* Search for "char16_t" or "char32_t" types or fall back to 8-bit char 852 if type is not found. */ 853 if (size == 'h') 854 char_type = builtin_type (next_gdbarch)->builtin_char16; 855 else if (size == 'w') 856 char_type = builtin_type (next_gdbarch)->builtin_char32; 857 if (char_type) 858 val_type = char_type; 859 else 860 { 861 if (size != '\0' && size != 'b') 862 warning (_("Unable to display strings with " 863 "size '%c', using 'b' instead."), size); 864 size = 'b'; 865 val_type = builtin_type (next_gdbarch)->builtin_int8; 866 } 867 } 868 869 maxelts = 8; 870 if (size == 'w') 871 maxelts = 4; 872 if (size == 'g') 873 maxelts = 2; 874 if (format == 's' || format == 'i') 875 maxelts = 1; 876 877 get_formatted_print_options (&opts, format); 878 879 /* Print as many objects as specified in COUNT, at most maxelts per line, 880 with the address of the next one at the start of each line. */ 881 882 while (count > 0) 883 { 884 QUIT; 885 if (format == 'i') 886 fputs_filtered (pc_prefix (next_address), gdb_stdout); 887 print_address (next_gdbarch, next_address, gdb_stdout); 888 printf_filtered (":"); 889 for (i = maxelts; 890 i > 0 && count > 0; 891 i--, count--) 892 { 893 printf_filtered ("\t"); 894 /* Note that print_formatted sets next_address for the next 895 object. */ 896 last_examine_address = next_address; 897 898 if (last_examine_value) 899 value_free (last_examine_value); 900 901 /* The value to be displayed is not fetched greedily. 902 Instead, to avoid the possibility of a fetched value not 903 being used, its retrieval is delayed until the print code 904 uses it. When examining an instruction stream, the 905 disassembler will perform its own memory fetch using just 906 the address stored in LAST_EXAMINE_VALUE. FIXME: Should 907 the disassembler be modified so that LAST_EXAMINE_VALUE 908 is left with the byte sequence from the last complete 909 instruction fetched from memory? */ 910 last_examine_value = value_at_lazy (val_type, next_address); 911 912 if (last_examine_value) 913 release_value (last_examine_value); 914 915 print_formatted (last_examine_value, size, &opts, gdb_stdout); 916 917 /* Display any branch delay slots following the final insn. */ 918 if (format == 'i' && count == 1) 919 count += branch_delay_insns; 920 } 921 printf_filtered ("\n"); 922 gdb_flush (gdb_stdout); 923 } 924 } 925 926 static void 927 validate_format (struct format_data fmt, char *cmdname) 928 { 929 if (fmt.size != 0) 930 error (_("Size letters are meaningless in \"%s\" command."), cmdname); 931 if (fmt.count != 1) 932 error (_("Item count other than 1 is meaningless in \"%s\" command."), 933 cmdname); 934 if (fmt.format == 'i') 935 error (_("Format letter \"%c\" is meaningless in \"%s\" command."), 936 fmt.format, cmdname); 937 } 938 939 /* Evaluate string EXP as an expression in the current language and 940 print the resulting value. EXP may contain a format specifier as the 941 first argument ("/x myvar" for example, to print myvar in hex). */ 942 943 static void 944 print_command_1 (char *exp, int inspect, int voidprint) 945 { 946 struct expression *expr; 947 struct cleanup *old_chain = 0; 948 char format = 0; 949 struct value *val; 950 struct format_data fmt; 951 int cleanup = 0; 952 953 if (exp && *exp == '/') 954 { 955 exp++; 956 fmt = decode_format (&exp, last_format, 0); 957 validate_format (fmt, "print"); 958 last_format = format = fmt.format; 959 } 960 else 961 { 962 fmt.count = 1; 963 fmt.format = 0; 964 fmt.size = 0; 965 fmt.raw = 0; 966 } 967 968 if (exp && *exp) 969 { 970 expr = parse_expression (exp); 971 old_chain = make_cleanup (free_current_contents, &expr); 972 cleanup = 1; 973 val = evaluate_expression (expr); 974 } 975 else 976 val = access_value_history (0); 977 978 if (voidprint || (val && value_type (val) && 979 TYPE_CODE (value_type (val)) != TYPE_CODE_VOID)) 980 { 981 struct value_print_options opts; 982 int histindex = record_latest_value (val); 983 984 if (histindex >= 0) 985 annotate_value_history_begin (histindex, value_type (val)); 986 else 987 annotate_value_begin (value_type (val)); 988 989 if (inspect) 990 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"", 991 exp, histindex); 992 else if (histindex >= 0) 993 printf_filtered ("$%d = ", histindex); 994 995 if (histindex >= 0) 996 annotate_value_history_value (); 997 998 get_formatted_print_options (&opts, format); 999 opts.inspect_it = inspect; 1000 opts.raw = fmt.raw; 1001 1002 print_formatted (val, fmt.size, &opts, gdb_stdout); 1003 printf_filtered ("\n"); 1004 1005 if (histindex >= 0) 1006 annotate_value_history_end (); 1007 else 1008 annotate_value_end (); 1009 1010 if (inspect) 1011 printf_unfiltered ("\") )\030"); 1012 } 1013 1014 if (cleanup) 1015 do_cleanups (old_chain); 1016 } 1017 1018 static void 1019 print_command (char *exp, int from_tty) 1020 { 1021 print_command_1 (exp, 0, 1); 1022 } 1023 1024 /* Same as print, except in epoch, it gets its own window. */ 1025 static void 1026 inspect_command (char *exp, int from_tty) 1027 { 1028 extern int epoch_interface; 1029 1030 print_command_1 (exp, epoch_interface, 1); 1031 } 1032 1033 /* Same as print, except it doesn't print void results. */ 1034 static void 1035 call_command (char *exp, int from_tty) 1036 { 1037 print_command_1 (exp, 0, 0); 1038 } 1039 1040 void 1041 output_command (char *exp, int from_tty) 1042 { 1043 struct expression *expr; 1044 struct cleanup *old_chain; 1045 char format = 0; 1046 struct value *val; 1047 struct format_data fmt; 1048 struct value_print_options opts; 1049 1050 fmt.size = 0; 1051 fmt.raw = 0; 1052 1053 if (exp && *exp == '/') 1054 { 1055 exp++; 1056 fmt = decode_format (&exp, 0, 0); 1057 validate_format (fmt, "output"); 1058 format = fmt.format; 1059 } 1060 1061 expr = parse_expression (exp); 1062 old_chain = make_cleanup (free_current_contents, &expr); 1063 1064 val = evaluate_expression (expr); 1065 1066 annotate_value_begin (value_type (val)); 1067 1068 get_formatted_print_options (&opts, format); 1069 opts.raw = fmt.raw; 1070 print_formatted (val, fmt.size, &opts, gdb_stdout); 1071 1072 annotate_value_end (); 1073 1074 wrap_here (""); 1075 gdb_flush (gdb_stdout); 1076 1077 do_cleanups (old_chain); 1078 } 1079 1080 static void 1081 set_command (char *exp, int from_tty) 1082 { 1083 struct expression *expr = parse_expression (exp); 1084 struct cleanup *old_chain = 1085 make_cleanup (free_current_contents, &expr); 1086 1087 evaluate_expression (expr); 1088 do_cleanups (old_chain); 1089 } 1090 1091 static void 1092 sym_info (char *arg, int from_tty) 1093 { 1094 struct minimal_symbol *msymbol; 1095 struct objfile *objfile; 1096 struct obj_section *osect; 1097 CORE_ADDR addr, sect_addr; 1098 int matches = 0; 1099 unsigned int offset; 1100 1101 if (!arg) 1102 error_no_arg (_("address")); 1103 1104 addr = parse_and_eval_address (arg); 1105 ALL_OBJSECTIONS (objfile, osect) 1106 { 1107 /* Only process each object file once, even if there's a separate 1108 debug file. */ 1109 if (objfile->separate_debug_objfile_backlink) 1110 continue; 1111 1112 sect_addr = overlay_mapped_address (addr, osect); 1113 1114 if (obj_section_addr (osect) <= sect_addr 1115 && sect_addr < obj_section_endaddr (osect) 1116 && (msymbol = lookup_minimal_symbol_by_pc_section (sect_addr, osect))) 1117 { 1118 const char *obj_name, *mapped, *sec_name, *msym_name; 1119 char *loc_string; 1120 struct cleanup *old_chain; 1121 1122 matches = 1; 1123 offset = sect_addr - SYMBOL_VALUE_ADDRESS (msymbol); 1124 mapped = section_is_mapped (osect) ? _("mapped") : _("unmapped"); 1125 sec_name = osect->the_bfd_section->name; 1126 msym_name = SYMBOL_PRINT_NAME (msymbol); 1127 1128 /* Don't print the offset if it is zero. 1129 We assume there's no need to handle i18n of "sym + offset". */ 1130 if (offset) 1131 loc_string = xstrprintf ("%s + %u", msym_name, offset); 1132 else 1133 loc_string = xstrprintf ("%s", msym_name); 1134 1135 /* Use a cleanup to free loc_string in case the user quits 1136 a pagination request inside printf_filtered. */ 1137 old_chain = make_cleanup (xfree, loc_string); 1138 1139 gdb_assert (osect->objfile && osect->objfile->name); 1140 obj_name = osect->objfile->name; 1141 1142 if (MULTI_OBJFILE_P ()) 1143 if (pc_in_unmapped_range (addr, osect)) 1144 if (section_is_overlay (osect)) 1145 printf_filtered (_("%s in load address range of " 1146 "%s overlay section %s of %s\n"), 1147 loc_string, mapped, sec_name, obj_name); 1148 else 1149 printf_filtered (_("%s in load address range of " 1150 "section %s of %s\n"), 1151 loc_string, sec_name, obj_name); 1152 else 1153 if (section_is_overlay (osect)) 1154 printf_filtered (_("%s in %s overlay section %s of %s\n"), 1155 loc_string, mapped, sec_name, obj_name); 1156 else 1157 printf_filtered (_("%s in section %s of %s\n"), 1158 loc_string, sec_name, obj_name); 1159 else 1160 if (pc_in_unmapped_range (addr, osect)) 1161 if (section_is_overlay (osect)) 1162 printf_filtered (_("%s in load address range of %s overlay " 1163 "section %s\n"), 1164 loc_string, mapped, sec_name); 1165 else 1166 printf_filtered (_("%s in load address range of section %s\n"), 1167 loc_string, sec_name); 1168 else 1169 if (section_is_overlay (osect)) 1170 printf_filtered (_("%s in %s overlay section %s\n"), 1171 loc_string, mapped, sec_name); 1172 else 1173 printf_filtered (_("%s in section %s\n"), 1174 loc_string, sec_name); 1175 1176 do_cleanups (old_chain); 1177 } 1178 } 1179 if (matches == 0) 1180 printf_filtered (_("No symbol matches %s.\n"), arg); 1181 } 1182 1183 static void 1184 address_info (char *exp, int from_tty) 1185 { 1186 struct gdbarch *gdbarch; 1187 int regno; 1188 struct symbol *sym; 1189 struct minimal_symbol *msymbol; 1190 long val; 1191 struct obj_section *section; 1192 CORE_ADDR load_addr, context_pc = 0; 1193 int is_a_field_of_this; /* C++: lookup_symbol sets this to nonzero 1194 if exp is a field of `this'. */ 1195 1196 if (exp == 0) 1197 error (_("Argument required.")); 1198 1199 sym = lookup_symbol (exp, get_selected_block (&context_pc), VAR_DOMAIN, 1200 &is_a_field_of_this); 1201 if (sym == NULL) 1202 { 1203 if (is_a_field_of_this) 1204 { 1205 printf_filtered ("Symbol \""); 1206 fprintf_symbol_filtered (gdb_stdout, exp, 1207 current_language->la_language, DMGL_ANSI); 1208 printf_filtered ("\" is a field of the local class variable "); 1209 if (current_language->la_language == language_objc) 1210 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */ 1211 else 1212 printf_filtered ("`this'\n"); 1213 return; 1214 } 1215 1216 msymbol = lookup_minimal_symbol (exp, NULL, NULL); 1217 1218 if (msymbol != NULL) 1219 { 1220 gdbarch = get_objfile_arch (msymbol_objfile (msymbol)); 1221 load_addr = SYMBOL_VALUE_ADDRESS (msymbol); 1222 1223 printf_filtered ("Symbol \""); 1224 fprintf_symbol_filtered (gdb_stdout, exp, 1225 current_language->la_language, DMGL_ANSI); 1226 printf_filtered ("\" is at "); 1227 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1228 printf_filtered (" in a file compiled without debugging"); 1229 section = SYMBOL_OBJ_SECTION (msymbol); 1230 if (section_is_overlay (section)) 1231 { 1232 load_addr = overlay_unmapped_address (load_addr, section); 1233 printf_filtered (",\n -- loaded at "); 1234 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1235 printf_filtered (" in overlay section %s", 1236 section->the_bfd_section->name); 1237 } 1238 printf_filtered (".\n"); 1239 } 1240 else 1241 error (_("No symbol \"%s\" in current context."), exp); 1242 return; 1243 } 1244 1245 printf_filtered ("Symbol \""); 1246 fprintf_symbol_filtered (gdb_stdout, SYMBOL_PRINT_NAME (sym), 1247 current_language->la_language, DMGL_ANSI); 1248 printf_filtered ("\" is "); 1249 val = SYMBOL_VALUE (sym); 1250 section = SYMBOL_OBJ_SECTION (sym); 1251 gdbarch = get_objfile_arch (SYMBOL_SYMTAB (sym)->objfile); 1252 1253 switch (SYMBOL_CLASS (sym)) 1254 { 1255 case LOC_CONST: 1256 case LOC_CONST_BYTES: 1257 printf_filtered ("constant"); 1258 break; 1259 1260 case LOC_LABEL: 1261 printf_filtered ("a label at address "); 1262 load_addr = SYMBOL_VALUE_ADDRESS (sym); 1263 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1264 if (section_is_overlay (section)) 1265 { 1266 load_addr = overlay_unmapped_address (load_addr, section); 1267 printf_filtered (",\n -- loaded at "); 1268 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1269 printf_filtered (" in overlay section %s", 1270 section->the_bfd_section->name); 1271 } 1272 break; 1273 1274 case LOC_COMPUTED: 1275 /* FIXME: cagney/2004-01-26: It should be possible to 1276 unconditionally call the SYMBOL_COMPUTED_OPS method when available. 1277 Unfortunately DWARF 2 stores the frame-base (instead of the 1278 function) location in a function's symbol. Oops! For the 1279 moment enable this when/where applicable. */ 1280 SYMBOL_COMPUTED_OPS (sym)->describe_location (sym, context_pc, 1281 gdb_stdout); 1282 break; 1283 1284 case LOC_REGISTER: 1285 /* GDBARCH is the architecture associated with the objfile the symbol 1286 is defined in; the target architecture may be different, and may 1287 provide additional registers. However, we do not know the target 1288 architecture at this point. We assume the objfile architecture 1289 will contain all the standard registers that occur in debug info 1290 in that objfile. */ 1291 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch); 1292 1293 if (SYMBOL_IS_ARGUMENT (sym)) 1294 printf_filtered (_("an argument in register %s"), 1295 gdbarch_register_name (gdbarch, regno)); 1296 else 1297 printf_filtered (_("a variable in register %s"), 1298 gdbarch_register_name (gdbarch, regno)); 1299 break; 1300 1301 case LOC_STATIC: 1302 printf_filtered (_("static storage at address ")); 1303 load_addr = SYMBOL_VALUE_ADDRESS (sym); 1304 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1305 if (section_is_overlay (section)) 1306 { 1307 load_addr = overlay_unmapped_address (load_addr, section); 1308 printf_filtered (_(",\n -- loaded at ")); 1309 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1310 printf_filtered (_(" in overlay section %s"), 1311 section->the_bfd_section->name); 1312 } 1313 break; 1314 1315 case LOC_REGPARM_ADDR: 1316 /* Note comment at LOC_REGISTER. */ 1317 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch); 1318 printf_filtered (_("address of an argument in register %s"), 1319 gdbarch_register_name (gdbarch, regno)); 1320 break; 1321 1322 case LOC_ARG: 1323 printf_filtered (_("an argument at offset %ld"), val); 1324 break; 1325 1326 case LOC_LOCAL: 1327 printf_filtered (_("a local variable at frame offset %ld"), val); 1328 break; 1329 1330 case LOC_REF_ARG: 1331 printf_filtered (_("a reference argument at offset %ld"), val); 1332 break; 1333 1334 case LOC_TYPEDEF: 1335 printf_filtered (_("a typedef")); 1336 break; 1337 1338 case LOC_BLOCK: 1339 printf_filtered (_("a function at address ")); 1340 load_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym)); 1341 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1342 if (section_is_overlay (section)) 1343 { 1344 load_addr = overlay_unmapped_address (load_addr, section); 1345 printf_filtered (_(",\n -- loaded at ")); 1346 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1347 printf_filtered (_(" in overlay section %s"), 1348 section->the_bfd_section->name); 1349 } 1350 break; 1351 1352 case LOC_UNRESOLVED: 1353 { 1354 struct minimal_symbol *msym; 1355 1356 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym), NULL, NULL); 1357 if (msym == NULL) 1358 printf_filtered ("unresolved"); 1359 else 1360 { 1361 section = SYMBOL_OBJ_SECTION (msym); 1362 load_addr = SYMBOL_VALUE_ADDRESS (msym); 1363 1364 if (section 1365 && (section->the_bfd_section->flags & SEC_THREAD_LOCAL) != 0) 1366 printf_filtered (_("a thread-local variable at offset %s " 1367 "in the thread-local storage for `%s'"), 1368 paddress (gdbarch, load_addr), 1369 section->objfile->name); 1370 else 1371 { 1372 printf_filtered (_("static storage at address ")); 1373 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1374 if (section_is_overlay (section)) 1375 { 1376 load_addr = overlay_unmapped_address (load_addr, section); 1377 printf_filtered (_(",\n -- loaded at ")); 1378 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1379 printf_filtered (_(" in overlay section %s"), 1380 section->the_bfd_section->name); 1381 } 1382 } 1383 } 1384 } 1385 break; 1386 1387 case LOC_OPTIMIZED_OUT: 1388 printf_filtered (_("optimized out")); 1389 break; 1390 1391 default: 1392 printf_filtered (_("of unknown (botched) type")); 1393 break; 1394 } 1395 printf_filtered (".\n"); 1396 } 1397 1398 1399 static void 1400 x_command (char *exp, int from_tty) 1401 { 1402 struct expression *expr; 1403 struct format_data fmt; 1404 struct cleanup *old_chain; 1405 struct value *val; 1406 1407 fmt.format = last_format ? last_format : 'x'; 1408 fmt.size = last_size; 1409 fmt.count = 1; 1410 fmt.raw = 0; 1411 1412 if (exp && *exp == '/') 1413 { 1414 exp++; 1415 fmt = decode_format (&exp, last_format, last_size); 1416 } 1417 1418 /* If we have an expression, evaluate it and use it as the address. */ 1419 1420 if (exp != 0 && *exp != 0) 1421 { 1422 expr = parse_expression (exp); 1423 /* Cause expression not to be there any more if this command is 1424 repeated with Newline. But don't clobber a user-defined 1425 command's definition. */ 1426 if (from_tty) 1427 *exp = 0; 1428 old_chain = make_cleanup (free_current_contents, &expr); 1429 val = evaluate_expression (expr); 1430 if (TYPE_CODE (value_type (val)) == TYPE_CODE_REF) 1431 val = coerce_ref (val); 1432 /* In rvalue contexts, such as this, functions are coerced into 1433 pointers to functions. This makes "x/i main" work. */ 1434 if (/* last_format == 'i' && */ 1435 TYPE_CODE (value_type (val)) == TYPE_CODE_FUNC 1436 && VALUE_LVAL (val) == lval_memory) 1437 next_address = value_address (val); 1438 else 1439 next_address = value_as_address (val); 1440 1441 next_gdbarch = expr->gdbarch; 1442 do_cleanups (old_chain); 1443 } 1444 1445 if (!next_gdbarch) 1446 error_no_arg (_("starting display address")); 1447 1448 do_examine (fmt, next_gdbarch, next_address); 1449 1450 /* If the examine succeeds, we remember its size and format for next 1451 time. Set last_size to 'b' for strings. */ 1452 if (fmt.format == 's') 1453 last_size = 'b'; 1454 else 1455 last_size = fmt.size; 1456 last_format = fmt.format; 1457 1458 /* Set a couple of internal variables if appropriate. */ 1459 if (last_examine_value) 1460 { 1461 /* Make last address examined available to the user as $_. Use 1462 the correct pointer type. */ 1463 struct type *pointer_type 1464 = lookup_pointer_type (value_type (last_examine_value)); 1465 set_internalvar (lookup_internalvar ("_"), 1466 value_from_pointer (pointer_type, 1467 last_examine_address)); 1468 1469 /* Make contents of last address examined available to the user 1470 as $__. If the last value has not been fetched from memory 1471 then don't fetch it now; instead mark it by voiding the $__ 1472 variable. */ 1473 if (value_lazy (last_examine_value)) 1474 clear_internalvar (lookup_internalvar ("__")); 1475 else 1476 set_internalvar (lookup_internalvar ("__"), last_examine_value); 1477 } 1478 } 1479 1480 1481 /* Add an expression to the auto-display chain. 1482 Specify the expression. */ 1483 1484 static void 1485 display_command (char *exp, int from_tty) 1486 { 1487 struct format_data fmt; 1488 struct expression *expr; 1489 struct display *new; 1490 int display_it = 1; 1491 1492 #if defined(TUI) 1493 /* NOTE: cagney/2003-02-13 The `tui_active' was previously 1494 `tui_version'. */ 1495 if (tui_active && exp != NULL && *exp == '$') 1496 display_it = (tui_set_layout_for_display_command (exp) == TUI_FAILURE); 1497 #endif 1498 1499 if (display_it) 1500 { 1501 if (exp == 0) 1502 { 1503 do_displays (); 1504 return; 1505 } 1506 1507 if (*exp == '/') 1508 { 1509 exp++; 1510 fmt = decode_format (&exp, 0, 0); 1511 if (fmt.size && fmt.format == 0) 1512 fmt.format = 'x'; 1513 if (fmt.format == 'i' || fmt.format == 's') 1514 fmt.size = 'b'; 1515 } 1516 else 1517 { 1518 fmt.format = 0; 1519 fmt.size = 0; 1520 fmt.count = 0; 1521 fmt.raw = 0; 1522 } 1523 1524 innermost_block = NULL; 1525 expr = parse_expression (exp); 1526 1527 new = (struct display *) xmalloc (sizeof (struct display)); 1528 1529 new->exp_string = xstrdup (exp); 1530 new->exp = expr; 1531 new->block = innermost_block; 1532 new->pspace = current_program_space; 1533 new->next = display_chain; 1534 new->number = ++display_number; 1535 new->format = fmt; 1536 new->enabled_p = 1; 1537 display_chain = new; 1538 1539 if (from_tty && target_has_execution) 1540 do_one_display (new); 1541 1542 dont_repeat (); 1543 } 1544 } 1545 1546 static void 1547 free_display (struct display *d) 1548 { 1549 xfree (d->exp_string); 1550 xfree (d->exp); 1551 xfree (d); 1552 } 1553 1554 /* Clear out the display_chain. Done when new symtabs are loaded, 1555 since this invalidates the types stored in many expressions. */ 1556 1557 void 1558 clear_displays (void) 1559 { 1560 struct display *d; 1561 1562 while ((d = display_chain) != NULL) 1563 { 1564 display_chain = d->next; 1565 free_display (d); 1566 } 1567 } 1568 1569 /* Delete the auto-display DISPLAY. */ 1570 1571 static void 1572 delete_display (struct display *display) 1573 { 1574 struct display *d; 1575 1576 gdb_assert (display != NULL); 1577 1578 if (display_chain == display) 1579 display_chain = display->next; 1580 1581 ALL_DISPLAYS (d) 1582 if (d->next == display) 1583 { 1584 d->next = display->next; 1585 break; 1586 } 1587 1588 free_display (display); 1589 } 1590 1591 /* Call FUNCTION on each of the displays whose numbers are given in 1592 ARGS. DATA is passed unmodified to FUNCTION. */ 1593 1594 static void 1595 map_display_numbers (char *args, 1596 void (*function) (struct display *, 1597 void *), 1598 void *data) 1599 { 1600 struct get_number_or_range_state state; 1601 struct display *b, *tmp; 1602 int num; 1603 1604 if (args == NULL) 1605 error_no_arg (_("one or more display numbers")); 1606 1607 init_number_or_range (&state, args); 1608 1609 while (!state.finished) 1610 { 1611 char *p = state.string; 1612 1613 num = get_number_or_range (&state); 1614 if (num == 0) 1615 warning (_("bad display number at or near '%s'"), p); 1616 else 1617 { 1618 struct display *d, *tmp; 1619 1620 ALL_DISPLAYS_SAFE (d, tmp) 1621 if (d->number == num) 1622 break; 1623 if (d == NULL) 1624 printf_unfiltered (_("No display number %d.\n"), num); 1625 else 1626 function (d, data); 1627 } 1628 } 1629 } 1630 1631 /* Callback for map_display_numbers, that deletes a display. */ 1632 1633 static void 1634 do_delete_display (struct display *d, void *data) 1635 { 1636 delete_display (d); 1637 } 1638 1639 /* "undisplay" command. */ 1640 1641 static void 1642 undisplay_command (char *args, int from_tty) 1643 { 1644 int num; 1645 struct get_number_or_range_state state; 1646 1647 if (args == NULL) 1648 { 1649 if (query (_("Delete all auto-display expressions? "))) 1650 clear_displays (); 1651 dont_repeat (); 1652 return; 1653 } 1654 1655 map_display_numbers (args, do_delete_display, NULL); 1656 dont_repeat (); 1657 } 1658 1659 /* Display a single auto-display. 1660 Do nothing if the display cannot be printed in the current context, 1661 or if the display is disabled. */ 1662 1663 static void 1664 do_one_display (struct display *d) 1665 { 1666 int within_current_scope; 1667 1668 if (d->enabled_p == 0) 1669 return; 1670 1671 /* The expression carries the architecture that was used at parse time. 1672 This is a problem if the expression depends on architecture features 1673 (e.g. register numbers), and the current architecture is now different. 1674 For example, a display statement like "display/i $pc" is expected to 1675 display the PC register of the current architecture, not the arch at 1676 the time the display command was given. Therefore, we re-parse the 1677 expression if the current architecture has changed. */ 1678 if (d->exp != NULL && d->exp->gdbarch != get_current_arch ()) 1679 { 1680 xfree (d->exp); 1681 d->exp = NULL; 1682 d->block = NULL; 1683 } 1684 1685 if (d->exp == NULL) 1686 { 1687 volatile struct gdb_exception ex; 1688 1689 TRY_CATCH (ex, RETURN_MASK_ALL) 1690 { 1691 innermost_block = NULL; 1692 d->exp = parse_expression (d->exp_string); 1693 d->block = innermost_block; 1694 } 1695 if (ex.reason < 0) 1696 { 1697 /* Can't re-parse the expression. Disable this display item. */ 1698 d->enabled_p = 0; 1699 warning (_("Unable to display \"%s\": %s"), 1700 d->exp_string, ex.message); 1701 return; 1702 } 1703 } 1704 1705 if (d->block) 1706 { 1707 if (d->pspace == current_program_space) 1708 within_current_scope = contained_in (get_selected_block (0), d->block); 1709 else 1710 within_current_scope = 0; 1711 } 1712 else 1713 within_current_scope = 1; 1714 if (!within_current_scope) 1715 return; 1716 1717 current_display_number = d->number; 1718 1719 annotate_display_begin (); 1720 printf_filtered ("%d", d->number); 1721 annotate_display_number_end (); 1722 printf_filtered (": "); 1723 if (d->format.size) 1724 { 1725 CORE_ADDR addr; 1726 struct value *val; 1727 1728 annotate_display_format (); 1729 1730 printf_filtered ("x/"); 1731 if (d->format.count != 1) 1732 printf_filtered ("%d", d->format.count); 1733 printf_filtered ("%c", d->format.format); 1734 if (d->format.format != 'i' && d->format.format != 's') 1735 printf_filtered ("%c", d->format.size); 1736 printf_filtered (" "); 1737 1738 annotate_display_expression (); 1739 1740 puts_filtered (d->exp_string); 1741 annotate_display_expression_end (); 1742 1743 if (d->format.count != 1 || d->format.format == 'i') 1744 printf_filtered ("\n"); 1745 else 1746 printf_filtered (" "); 1747 1748 val = evaluate_expression (d->exp); 1749 addr = value_as_address (val); 1750 if (d->format.format == 'i') 1751 addr = gdbarch_addr_bits_remove (d->exp->gdbarch, addr); 1752 1753 annotate_display_value (); 1754 1755 do_examine (d->format, d->exp->gdbarch, addr); 1756 } 1757 else 1758 { 1759 struct value_print_options opts; 1760 1761 annotate_display_format (); 1762 1763 if (d->format.format) 1764 printf_filtered ("/%c ", d->format.format); 1765 1766 annotate_display_expression (); 1767 1768 puts_filtered (d->exp_string); 1769 annotate_display_expression_end (); 1770 1771 printf_filtered (" = "); 1772 1773 annotate_display_expression (); 1774 1775 get_formatted_print_options (&opts, d->format.format); 1776 opts.raw = d->format.raw; 1777 print_formatted (evaluate_expression (d->exp), 1778 d->format.size, &opts, gdb_stdout); 1779 printf_filtered ("\n"); 1780 } 1781 1782 annotate_display_end (); 1783 1784 gdb_flush (gdb_stdout); 1785 current_display_number = -1; 1786 } 1787 1788 /* Display all of the values on the auto-display chain which can be 1789 evaluated in the current scope. */ 1790 1791 void 1792 do_displays (void) 1793 { 1794 struct display *d; 1795 1796 for (d = display_chain; d; d = d->next) 1797 do_one_display (d); 1798 } 1799 1800 /* Delete the auto-display which we were in the process of displaying. 1801 This is done when there is an error or a signal. */ 1802 1803 void 1804 disable_display (int num) 1805 { 1806 struct display *d; 1807 1808 for (d = display_chain; d; d = d->next) 1809 if (d->number == num) 1810 { 1811 d->enabled_p = 0; 1812 return; 1813 } 1814 printf_unfiltered (_("No display number %d.\n"), num); 1815 } 1816 1817 void 1818 disable_current_display (void) 1819 { 1820 if (current_display_number >= 0) 1821 { 1822 disable_display (current_display_number); 1823 fprintf_unfiltered (gdb_stderr, 1824 _("Disabling display %d to " 1825 "avoid infinite recursion.\n"), 1826 current_display_number); 1827 } 1828 current_display_number = -1; 1829 } 1830 1831 static void 1832 display_info (char *ignore, int from_tty) 1833 { 1834 struct display *d; 1835 1836 if (!display_chain) 1837 printf_unfiltered (_("There are no auto-display expressions now.\n")); 1838 else 1839 printf_filtered (_("Auto-display expressions now in effect:\n\ 1840 Num Enb Expression\n")); 1841 1842 for (d = display_chain; d; d = d->next) 1843 { 1844 printf_filtered ("%d: %c ", d->number, "ny"[(int) d->enabled_p]); 1845 if (d->format.size) 1846 printf_filtered ("/%d%c%c ", d->format.count, d->format.size, 1847 d->format.format); 1848 else if (d->format.format) 1849 printf_filtered ("/%c ", d->format.format); 1850 puts_filtered (d->exp_string); 1851 if (d->block && !contained_in (get_selected_block (0), d->block)) 1852 printf_filtered (_(" (cannot be evaluated in the current context)")); 1853 printf_filtered ("\n"); 1854 gdb_flush (gdb_stdout); 1855 } 1856 } 1857 1858 /* Callback fo map_display_numbers, that enables or disables the 1859 passed in display D. */ 1860 1861 static void 1862 do_enable_disable_display (struct display *d, void *data) 1863 { 1864 d->enabled_p = *(int *) data; 1865 } 1866 1867 /* Implamentation of both the "disable display" and "enable display" 1868 commands. ENABLE decides what to do. */ 1869 1870 static void 1871 enable_disable_display_command (char *args, int from_tty, int enable) 1872 { 1873 if (args == NULL) 1874 { 1875 struct display *d; 1876 1877 ALL_DISPLAYS (d) 1878 d->enabled_p = enable; 1879 return; 1880 } 1881 1882 map_display_numbers (args, do_enable_disable_display, &enable); 1883 } 1884 1885 /* The "enable display" command. */ 1886 1887 static void 1888 enable_display_command (char *args, int from_tty) 1889 { 1890 enable_disable_display_command (args, from_tty, 1); 1891 } 1892 1893 /* The "disable display" command. */ 1894 1895 static void 1896 disable_display_command (char *args, int from_tty) 1897 { 1898 enable_disable_display_command (args, from_tty, 0); 1899 } 1900 1901 /* display_chain items point to blocks and expressions. Some expressions in 1902 turn may point to symbols. 1903 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are 1904 obstack_free'd when a shared library is unloaded. 1905 Clear pointers that are about to become dangling. 1906 Both .exp and .block fields will be restored next time we need to display 1907 an item by re-parsing .exp_string field in the new execution context. */ 1908 1909 static void 1910 clear_dangling_display_expressions (struct so_list *solib) 1911 { 1912 struct objfile *objfile = solib->objfile; 1913 struct display *d; 1914 1915 /* With no symbol file we cannot have a block or expression from it. */ 1916 if (objfile == NULL) 1917 return; 1918 if (objfile->separate_debug_objfile_backlink) 1919 objfile = objfile->separate_debug_objfile_backlink; 1920 gdb_assert (objfile->pspace == solib->pspace); 1921 1922 for (d = display_chain; d != NULL; d = d->next) 1923 { 1924 if (d->pspace != solib->pspace) 1925 continue; 1926 1927 if (lookup_objfile_from_block (d->block) == objfile 1928 || (d->exp && exp_uses_objfile (d->exp, objfile))) 1929 { 1930 xfree (d->exp); 1931 d->exp = NULL; 1932 d->block = NULL; 1933 } 1934 } 1935 } 1936 1937 1938 /* Print the value in stack frame FRAME of a variable specified by a 1939 struct symbol. NAME is the name to print; if NULL then VAR's print 1940 name will be used. STREAM is the ui_file on which to print the 1941 value. INDENT specifies the number of indent levels to print 1942 before printing the variable name. */ 1943 1944 void 1945 print_variable_and_value (const char *name, struct symbol *var, 1946 struct frame_info *frame, 1947 struct ui_file *stream, int indent) 1948 { 1949 volatile struct gdb_exception except; 1950 1951 if (!name) 1952 name = SYMBOL_PRINT_NAME (var); 1953 1954 fprintf_filtered (stream, "%s%s = ", n_spaces (2 * indent), name); 1955 TRY_CATCH (except, RETURN_MASK_ERROR) 1956 { 1957 struct value *val; 1958 struct value_print_options opts; 1959 1960 val = read_var_value (var, frame); 1961 get_user_print_options (&opts); 1962 common_val_print (val, stream, indent, &opts, current_language); 1963 } 1964 if (except.reason < 0) 1965 fprintf_filtered(stream, "<error reading variable %s (%s)>", name, 1966 except.message); 1967 fprintf_filtered (stream, "\n"); 1968 } 1969 1970 /* printf "printf format string" ARG to STREAM. */ 1971 1972 static void 1973 ui_printf (char *arg, struct ui_file *stream) 1974 { 1975 char *f = NULL; 1976 char *s = arg; 1977 char *string = NULL; 1978 struct value **val_args; 1979 char *substrings; 1980 char *current_substring; 1981 int nargs = 0; 1982 int allocated_args = 20; 1983 struct cleanup *old_cleanups; 1984 1985 val_args = xmalloc (allocated_args * sizeof (struct value *)); 1986 old_cleanups = make_cleanup (free_current_contents, &val_args); 1987 1988 if (s == 0) 1989 error_no_arg (_("format-control string and values to print")); 1990 1991 s = skip_spaces (s); 1992 1993 /* A format string should follow, enveloped in double quotes. */ 1994 if (*s++ != '"') 1995 error (_("Bad format string, missing '\"'.")); 1996 1997 /* Parse the format-control string and copy it into the string STRING, 1998 processing some kinds of escape sequence. */ 1999 2000 f = string = (char *) alloca (strlen (s) + 1); 2001 2002 while (*s != '"') 2003 { 2004 int c = *s++; 2005 switch (c) 2006 { 2007 case '\0': 2008 error (_("Bad format string, non-terminated '\"'.")); 2009 2010 case '\\': 2011 switch (c = *s++) 2012 { 2013 case '\\': 2014 *f++ = '\\'; 2015 break; 2016 case 'a': 2017 *f++ = '\a'; 2018 break; 2019 case 'b': 2020 *f++ = '\b'; 2021 break; 2022 case 'f': 2023 *f++ = '\f'; 2024 break; 2025 case 'n': 2026 *f++ = '\n'; 2027 break; 2028 case 'r': 2029 *f++ = '\r'; 2030 break; 2031 case 't': 2032 *f++ = '\t'; 2033 break; 2034 case 'v': 2035 *f++ = '\v'; 2036 break; 2037 case '"': 2038 *f++ = '"'; 2039 break; 2040 default: 2041 /* ??? TODO: handle other escape sequences. */ 2042 error (_("Unrecognized escape character \\%c in format string."), 2043 c); 2044 } 2045 break; 2046 2047 default: 2048 *f++ = c; 2049 } 2050 } 2051 2052 /* Skip over " and following space and comma. */ 2053 s++; 2054 *f++ = '\0'; 2055 s = skip_spaces (s); 2056 2057 if (*s != ',' && *s != 0) 2058 error (_("Invalid argument syntax")); 2059 2060 if (*s == ',') 2061 s++; 2062 s = skip_spaces (s); 2063 2064 /* Need extra space for the '\0's. Doubling the size is sufficient. */ 2065 substrings = alloca (strlen (string) * 2); 2066 current_substring = substrings; 2067 2068 { 2069 /* Now scan the string for %-specs and see what kinds of args they want. 2070 argclass[I] classifies the %-specs so we can give printf_filtered 2071 something of the right size. */ 2072 2073 enum argclass 2074 { 2075 int_arg, long_arg, long_long_arg, ptr_arg, 2076 string_arg, wide_string_arg, wide_char_arg, 2077 double_arg, long_double_arg, decfloat_arg 2078 }; 2079 enum argclass *argclass; 2080 enum argclass this_argclass; 2081 char *last_arg; 2082 int nargs_wanted; 2083 int i; 2084 2085 argclass = (enum argclass *) alloca (strlen (s) * sizeof *argclass); 2086 nargs_wanted = 0; 2087 f = string; 2088 last_arg = string; 2089 while (*f) 2090 if (*f++ == '%') 2091 { 2092 int seen_hash = 0, seen_zero = 0, lcount = 0, seen_prec = 0; 2093 int seen_space = 0, seen_plus = 0; 2094 int seen_big_l = 0, seen_h = 0, seen_big_h = 0; 2095 int seen_big_d = 0, seen_double_big_d = 0; 2096 int bad = 0; 2097 2098 /* Check the validity of the format specifier, and work 2099 out what argument it expects. We only accept C89 2100 format strings, with the exception of long long (which 2101 we autoconf for). */ 2102 2103 /* Skip over "%%". */ 2104 if (*f == '%') 2105 { 2106 f++; 2107 continue; 2108 } 2109 2110 /* The first part of a format specifier is a set of flag 2111 characters. */ 2112 while (strchr ("0-+ #", *f)) 2113 { 2114 if (*f == '#') 2115 seen_hash = 1; 2116 else if (*f == '0') 2117 seen_zero = 1; 2118 else if (*f == ' ') 2119 seen_space = 1; 2120 else if (*f == '+') 2121 seen_plus = 1; 2122 f++; 2123 } 2124 2125 /* The next part of a format specifier is a width. */ 2126 while (strchr ("0123456789", *f)) 2127 f++; 2128 2129 /* The next part of a format specifier is a precision. */ 2130 if (*f == '.') 2131 { 2132 seen_prec = 1; 2133 f++; 2134 while (strchr ("0123456789", *f)) 2135 f++; 2136 } 2137 2138 /* The next part of a format specifier is a length modifier. */ 2139 if (*f == 'h') 2140 { 2141 seen_h = 1; 2142 f++; 2143 } 2144 else if (*f == 'l') 2145 { 2146 f++; 2147 lcount++; 2148 if (*f == 'l') 2149 { 2150 f++; 2151 lcount++; 2152 } 2153 } 2154 else if (*f == 'L') 2155 { 2156 seen_big_l = 1; 2157 f++; 2158 } 2159 /* Decimal32 modifier. */ 2160 else if (*f == 'H') 2161 { 2162 seen_big_h = 1; 2163 f++; 2164 } 2165 /* Decimal64 and Decimal128 modifiers. */ 2166 else if (*f == 'D') 2167 { 2168 f++; 2169 2170 /* Check for a Decimal128. */ 2171 if (*f == 'D') 2172 { 2173 f++; 2174 seen_double_big_d = 1; 2175 } 2176 else 2177 seen_big_d = 1; 2178 } 2179 2180 switch (*f) 2181 { 2182 case 'u': 2183 if (seen_hash) 2184 bad = 1; 2185 /* FALLTHROUGH */ 2186 2187 case 'o': 2188 case 'x': 2189 case 'X': 2190 if (seen_space || seen_plus) 2191 bad = 1; 2192 /* FALLTHROUGH */ 2193 2194 case 'd': 2195 case 'i': 2196 if (lcount == 0) 2197 this_argclass = int_arg; 2198 else if (lcount == 1) 2199 this_argclass = long_arg; 2200 else 2201 this_argclass = long_long_arg; 2202 2203 if (seen_big_l) 2204 bad = 1; 2205 break; 2206 2207 case 'c': 2208 this_argclass = lcount == 0 ? int_arg : wide_char_arg; 2209 if (lcount > 1 || seen_h || seen_big_l) 2210 bad = 1; 2211 if (seen_prec || seen_zero || seen_space || seen_plus) 2212 bad = 1; 2213 break; 2214 2215 case 'p': 2216 this_argclass = ptr_arg; 2217 if (lcount || seen_h || seen_big_l) 2218 bad = 1; 2219 if (seen_prec || seen_zero || seen_space || seen_plus) 2220 bad = 1; 2221 break; 2222 2223 case 's': 2224 this_argclass = lcount == 0 ? string_arg : wide_string_arg; 2225 if (lcount > 1 || seen_h || seen_big_l) 2226 bad = 1; 2227 if (seen_zero || seen_space || seen_plus) 2228 bad = 1; 2229 break; 2230 2231 case 'e': 2232 case 'f': 2233 case 'g': 2234 case 'E': 2235 case 'G': 2236 if (seen_big_h || seen_big_d || seen_double_big_d) 2237 this_argclass = decfloat_arg; 2238 else if (seen_big_l) 2239 this_argclass = long_double_arg; 2240 else 2241 this_argclass = double_arg; 2242 2243 if (lcount || seen_h) 2244 bad = 1; 2245 break; 2246 2247 case '*': 2248 error (_("`*' not supported for precision or width in printf")); 2249 2250 case 'n': 2251 error (_("Format specifier `n' not supported in printf")); 2252 2253 case '\0': 2254 error (_("Incomplete format specifier at end of format string")); 2255 2256 default: 2257 error (_("Unrecognized format specifier '%c' in printf"), *f); 2258 } 2259 2260 if (bad) 2261 error (_("Inappropriate modifiers to " 2262 "format specifier '%c' in printf"), 2263 *f); 2264 2265 f++; 2266 2267 if (lcount > 1 && USE_PRINTF_I64) 2268 { 2269 /* Windows' printf does support long long, but not the usual way. 2270 Convert %lld to %I64d. */ 2271 int length_before_ll = f - last_arg - 1 - lcount; 2272 2273 strncpy (current_substring, last_arg, length_before_ll); 2274 strcpy (current_substring + length_before_ll, "I64"); 2275 current_substring[length_before_ll + 3] = 2276 last_arg[length_before_ll + lcount]; 2277 current_substring += length_before_ll + 4; 2278 } 2279 else if (this_argclass == wide_string_arg 2280 || this_argclass == wide_char_arg) 2281 { 2282 /* Convert %ls or %lc to %s. */ 2283 int length_before_ls = f - last_arg - 2; 2284 2285 strncpy (current_substring, last_arg, length_before_ls); 2286 strcpy (current_substring + length_before_ls, "s"); 2287 current_substring += length_before_ls + 2; 2288 } 2289 else 2290 { 2291 strncpy (current_substring, last_arg, f - last_arg); 2292 current_substring += f - last_arg; 2293 } 2294 *current_substring++ = '\0'; 2295 last_arg = f; 2296 argclass[nargs_wanted++] = this_argclass; 2297 } 2298 2299 /* Now, parse all arguments and evaluate them. 2300 Store the VALUEs in VAL_ARGS. */ 2301 2302 while (*s != '\0') 2303 { 2304 char *s1; 2305 2306 if (nargs == allocated_args) 2307 val_args = (struct value **) xrealloc ((char *) val_args, 2308 (allocated_args *= 2) 2309 * sizeof (struct value *)); 2310 s1 = s; 2311 val_args[nargs] = parse_to_comma_and_eval (&s1); 2312 2313 nargs++; 2314 s = s1; 2315 if (*s == ',') 2316 s++; 2317 } 2318 2319 if (nargs != nargs_wanted) 2320 error (_("Wrong number of arguments for specified format-string")); 2321 2322 /* Now actually print them. */ 2323 current_substring = substrings; 2324 for (i = 0; i < nargs; i++) 2325 { 2326 switch (argclass[i]) 2327 { 2328 case string_arg: 2329 { 2330 gdb_byte *str; 2331 CORE_ADDR tem; 2332 int j; 2333 2334 tem = value_as_address (val_args[i]); 2335 2336 /* This is a %s argument. Find the length of the string. */ 2337 for (j = 0;; j++) 2338 { 2339 gdb_byte c; 2340 2341 QUIT; 2342 read_memory (tem + j, &c, 1); 2343 if (c == 0) 2344 break; 2345 } 2346 2347 /* Copy the string contents into a string inside GDB. */ 2348 str = (gdb_byte *) alloca (j + 1); 2349 if (j != 0) 2350 read_memory (tem, str, j); 2351 str[j] = 0; 2352 2353 fprintf_filtered (stream, current_substring, (char *) str); 2354 } 2355 break; 2356 case wide_string_arg: 2357 { 2358 gdb_byte *str; 2359 CORE_ADDR tem; 2360 int j; 2361 struct gdbarch *gdbarch 2362 = get_type_arch (value_type (val_args[i])); 2363 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); 2364 struct type *wctype = lookup_typename (current_language, gdbarch, 2365 "wchar_t", NULL, 0); 2366 int wcwidth = TYPE_LENGTH (wctype); 2367 gdb_byte *buf = alloca (wcwidth); 2368 struct obstack output; 2369 struct cleanup *inner_cleanup; 2370 2371 tem = value_as_address (val_args[i]); 2372 2373 /* This is a %s argument. Find the length of the string. */ 2374 for (j = 0;; j += wcwidth) 2375 { 2376 QUIT; 2377 read_memory (tem + j, buf, wcwidth); 2378 if (extract_unsigned_integer (buf, wcwidth, byte_order) == 0) 2379 break; 2380 } 2381 2382 /* Copy the string contents into a string inside GDB. */ 2383 str = (gdb_byte *) alloca (j + wcwidth); 2384 if (j != 0) 2385 read_memory (tem, str, j); 2386 memset (&str[j], 0, wcwidth); 2387 2388 obstack_init (&output); 2389 inner_cleanup = make_cleanup_obstack_free (&output); 2390 2391 convert_between_encodings (target_wide_charset (gdbarch), 2392 host_charset (), 2393 str, j, wcwidth, 2394 &output, translit_char); 2395 obstack_grow_str0 (&output, ""); 2396 2397 fprintf_filtered (stream, current_substring, 2398 obstack_base (&output)); 2399 do_cleanups (inner_cleanup); 2400 } 2401 break; 2402 case wide_char_arg: 2403 { 2404 struct gdbarch *gdbarch 2405 = get_type_arch (value_type (val_args[i])); 2406 struct type *wctype = lookup_typename (current_language, gdbarch, 2407 "wchar_t", NULL, 0); 2408 struct type *valtype; 2409 struct obstack output; 2410 struct cleanup *inner_cleanup; 2411 const gdb_byte *bytes; 2412 2413 valtype = value_type (val_args[i]); 2414 if (TYPE_LENGTH (valtype) != TYPE_LENGTH (wctype) 2415 || TYPE_CODE (valtype) != TYPE_CODE_INT) 2416 error (_("expected wchar_t argument for %%lc")); 2417 2418 bytes = value_contents (val_args[i]); 2419 2420 obstack_init (&output); 2421 inner_cleanup = make_cleanup_obstack_free (&output); 2422 2423 convert_between_encodings (target_wide_charset (gdbarch), 2424 host_charset (), 2425 bytes, TYPE_LENGTH (valtype), 2426 TYPE_LENGTH (valtype), 2427 &output, translit_char); 2428 obstack_grow_str0 (&output, ""); 2429 2430 fprintf_filtered (stream, current_substring, 2431 obstack_base (&output)); 2432 do_cleanups (inner_cleanup); 2433 } 2434 break; 2435 case double_arg: 2436 { 2437 struct type *type = value_type (val_args[i]); 2438 DOUBLEST val; 2439 int inv; 2440 2441 /* If format string wants a float, unchecked-convert the value 2442 to floating point of the same size. */ 2443 type = float_type_from_length (type); 2444 val = unpack_double (type, value_contents (val_args[i]), &inv); 2445 if (inv) 2446 error (_("Invalid floating value found in program.")); 2447 2448 fprintf_filtered (stream, current_substring, (double) val); 2449 break; 2450 } 2451 case long_double_arg: 2452 #ifdef HAVE_LONG_DOUBLE 2453 { 2454 struct type *type = value_type (val_args[i]); 2455 DOUBLEST val; 2456 int inv; 2457 2458 /* If format string wants a float, unchecked-convert the value 2459 to floating point of the same size. */ 2460 type = float_type_from_length (type); 2461 val = unpack_double (type, value_contents (val_args[i]), &inv); 2462 if (inv) 2463 error (_("Invalid floating value found in program.")); 2464 2465 fprintf_filtered (stream, current_substring, 2466 (long double) val); 2467 break; 2468 } 2469 #else 2470 error (_("long double not supported in printf")); 2471 #endif 2472 case long_long_arg: 2473 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG) 2474 { 2475 long long val = value_as_long (val_args[i]); 2476 2477 fprintf_filtered (stream, current_substring, val); 2478 break; 2479 } 2480 #else 2481 error (_("long long not supported in printf")); 2482 #endif 2483 case int_arg: 2484 { 2485 int val = value_as_long (val_args[i]); 2486 2487 fprintf_filtered (stream, current_substring, val); 2488 break; 2489 } 2490 case long_arg: 2491 { 2492 long val = value_as_long (val_args[i]); 2493 2494 fprintf_filtered (stream, current_substring, val); 2495 break; 2496 } 2497 2498 /* Handles decimal floating values. */ 2499 case decfloat_arg: 2500 { 2501 const gdb_byte *param_ptr = value_contents (val_args[i]); 2502 2503 #if defined (PRINTF_HAS_DECFLOAT) 2504 /* If we have native support for Decimal floating 2505 printing, handle it here. */ 2506 fprintf_filtered (stream, current_substring, param_ptr); 2507 #else 2508 2509 /* As a workaround until vasprintf has native support for DFP 2510 we convert the DFP values to string and print them using 2511 the %s format specifier. */ 2512 2513 char *eos, *sos; 2514 int nnull_chars = 0; 2515 2516 /* Parameter data. */ 2517 struct type *param_type = value_type (val_args[i]); 2518 unsigned int param_len = TYPE_LENGTH (param_type); 2519 struct gdbarch *gdbarch = get_type_arch (param_type); 2520 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); 2521 2522 /* DFP output data. */ 2523 struct value *dfp_value = NULL; 2524 gdb_byte *dfp_ptr; 2525 int dfp_len = 16; 2526 gdb_byte dec[16]; 2527 struct type *dfp_type = NULL; 2528 char decstr[MAX_DECIMAL_STRING]; 2529 2530 /* Points to the end of the string so that we can go back 2531 and check for DFP length modifiers. */ 2532 eos = current_substring + strlen (current_substring); 2533 2534 /* Look for the float/double format specifier. */ 2535 while (*eos != 'f' && *eos != 'e' && *eos != 'E' 2536 && *eos != 'g' && *eos != 'G') 2537 eos--; 2538 2539 sos = eos; 2540 2541 /* Search for the '%' char and extract the size and type of 2542 the output decimal value based on its modifiers 2543 (%Hf, %Df, %DDf). */ 2544 while (*--sos != '%') 2545 { 2546 if (*sos == 'H') 2547 { 2548 dfp_len = 4; 2549 dfp_type = builtin_type (gdbarch)->builtin_decfloat; 2550 } 2551 else if (*sos == 'D' && *(sos - 1) == 'D') 2552 { 2553 dfp_len = 16; 2554 dfp_type = builtin_type (gdbarch)->builtin_declong; 2555 sos--; 2556 } 2557 else 2558 { 2559 dfp_len = 8; 2560 dfp_type = builtin_type (gdbarch)->builtin_decdouble; 2561 } 2562 } 2563 2564 /* Replace %Hf, %Df and %DDf with %s's. */ 2565 *++sos = 's'; 2566 2567 /* Go through the whole format string and pull the correct 2568 number of chars back to compensate for the change in the 2569 format specifier. */ 2570 while (nnull_chars < nargs - i) 2571 { 2572 if (*eos == '\0') 2573 nnull_chars++; 2574 2575 *++sos = *++eos; 2576 } 2577 2578 /* Conversion between different DFP types. */ 2579 if (TYPE_CODE (param_type) == TYPE_CODE_DECFLOAT) 2580 decimal_convert (param_ptr, param_len, byte_order, 2581 dec, dfp_len, byte_order); 2582 else 2583 /* If this is a non-trivial conversion, just output 0. 2584 A correct converted value can be displayed by explicitly 2585 casting to a DFP type. */ 2586 decimal_from_string (dec, dfp_len, byte_order, "0"); 2587 2588 dfp_value = value_from_decfloat (dfp_type, dec); 2589 2590 dfp_ptr = (gdb_byte *) value_contents (dfp_value); 2591 2592 decimal_to_string (dfp_ptr, dfp_len, byte_order, decstr); 2593 2594 /* Print the DFP value. */ 2595 fprintf_filtered (stream, current_substring, decstr); 2596 2597 break; 2598 #endif 2599 } 2600 2601 case ptr_arg: 2602 { 2603 /* We avoid the host's %p because pointers are too 2604 likely to be the wrong size. The only interesting 2605 modifier for %p is a width; extract that, and then 2606 handle %p as glibc would: %#x or a literal "(nil)". */ 2607 2608 char *p, *fmt, *fmt_p; 2609 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG) 2610 long long val = value_as_long (val_args[i]); 2611 #else 2612 long val = value_as_long (val_args[i]); 2613 #endif 2614 2615 fmt = alloca (strlen (current_substring) + 5); 2616 2617 /* Copy up to the leading %. */ 2618 p = current_substring; 2619 fmt_p = fmt; 2620 while (*p) 2621 { 2622 int is_percent = (*p == '%'); 2623 2624 *fmt_p++ = *p++; 2625 if (is_percent) 2626 { 2627 if (*p == '%') 2628 *fmt_p++ = *p++; 2629 else 2630 break; 2631 } 2632 } 2633 2634 if (val != 0) 2635 *fmt_p++ = '#'; 2636 2637 /* Copy any width. */ 2638 while (*p >= '0' && *p < '9') 2639 *fmt_p++ = *p++; 2640 2641 gdb_assert (*p == 'p' && *(p + 1) == '\0'); 2642 if (val != 0) 2643 { 2644 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG) 2645 *fmt_p++ = 'l'; 2646 #endif 2647 *fmt_p++ = 'l'; 2648 *fmt_p++ = 'x'; 2649 *fmt_p++ = '\0'; 2650 fprintf_filtered (stream, fmt, val); 2651 } 2652 else 2653 { 2654 *fmt_p++ = 's'; 2655 *fmt_p++ = '\0'; 2656 fprintf_filtered (stream, fmt, "(nil)"); 2657 } 2658 2659 break; 2660 } 2661 default: 2662 internal_error (__FILE__, __LINE__, 2663 _("failed internal consistency check")); 2664 } 2665 /* Skip to the next substring. */ 2666 current_substring += strlen (current_substring) + 1; 2667 } 2668 /* Print the portion of the format string after the last argument. 2669 Note that this will not include any ordinary %-specs, but it 2670 might include "%%". That is why we use printf_filtered and not 2671 puts_filtered here. Also, we pass a dummy argument because 2672 some platforms have modified GCC to include -Wformat-security 2673 by default, which will warn here if there is no argument. */ 2674 fprintf_filtered (stream, last_arg, 0); 2675 } 2676 do_cleanups (old_cleanups); 2677 } 2678 2679 /* Implement the "printf" command. */ 2680 2681 static void 2682 printf_command (char *arg, int from_tty) 2683 { 2684 ui_printf (arg, gdb_stdout); 2685 } 2686 2687 /* Implement the "eval" command. */ 2688 2689 static void 2690 eval_command (char *arg, int from_tty) 2691 { 2692 struct ui_file *ui_out = mem_fileopen (); 2693 struct cleanup *cleanups = make_cleanup_ui_file_delete (ui_out); 2694 char *expanded; 2695 2696 ui_printf (arg, ui_out); 2697 2698 expanded = ui_file_xstrdup (ui_out, NULL); 2699 make_cleanup (xfree, expanded); 2700 2701 execute_command (expanded, from_tty); 2702 2703 do_cleanups (cleanups); 2704 } 2705 2706 void 2707 _initialize_printcmd (void) 2708 { 2709 struct cmd_list_element *c; 2710 2711 current_display_number = -1; 2712 2713 observer_attach_solib_unloaded (clear_dangling_display_expressions); 2714 2715 add_info ("address", address_info, 2716 _("Describe where symbol SYM is stored.")); 2717 2718 add_info ("symbol", sym_info, _("\ 2719 Describe what symbol is at location ADDR.\n\ 2720 Only for symbols with fixed locations (global or static scope).")); 2721 2722 add_com ("x", class_vars, x_command, _("\ 2723 Examine memory: x/FMT ADDRESS.\n\ 2724 ADDRESS is an expression for the memory address to examine.\n\ 2725 FMT is a repeat count followed by a format letter and a size letter.\n\ 2726 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\ 2727 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\ 2728 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\ 2729 The specified number of objects of the specified size are printed\n\ 2730 according to the format.\n\n\ 2731 Defaults for format and size letters are those previously used.\n\ 2732 Default count is 1. Default address is following last thing printed\n\ 2733 with this command or \"print\".")); 2734 2735 #if 0 2736 add_com ("whereis", class_vars, whereis_command, 2737 _("Print line number and file of definition of variable.")); 2738 #endif 2739 2740 add_info ("display", display_info, _("\ 2741 Expressions to display when program stops, with code numbers.")); 2742 2743 add_cmd ("undisplay", class_vars, undisplay_command, _("\ 2744 Cancel some expressions to be displayed when program stops.\n\ 2745 Arguments are the code numbers of the expressions to stop displaying.\n\ 2746 No argument means cancel all automatic-display expressions.\n\ 2747 \"delete display\" has the same effect as this command.\n\ 2748 Do \"info display\" to see current list of code numbers."), 2749 &cmdlist); 2750 2751 add_com ("display", class_vars, display_command, _("\ 2752 Print value of expression EXP each time the program stops.\n\ 2753 /FMT may be used before EXP as in the \"print\" command.\n\ 2754 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\ 2755 as in the \"x\" command, and then EXP is used to get the address to examine\n\ 2756 and examining is done as in the \"x\" command.\n\n\ 2757 With no argument, display all currently requested auto-display expressions.\n\ 2758 Use \"undisplay\" to cancel display requests previously made.")); 2759 2760 add_cmd ("display", class_vars, enable_display_command, _("\ 2761 Enable some expressions to be displayed when program stops.\n\ 2762 Arguments are the code numbers of the expressions to resume displaying.\n\ 2763 No argument means enable all automatic-display expressions.\n\ 2764 Do \"info display\" to see current list of code numbers."), &enablelist); 2765 2766 add_cmd ("display", class_vars, disable_display_command, _("\ 2767 Disable some expressions to be displayed when program stops.\n\ 2768 Arguments are the code numbers of the expressions to stop displaying.\n\ 2769 No argument means disable all automatic-display expressions.\n\ 2770 Do \"info display\" to see current list of code numbers."), &disablelist); 2771 2772 add_cmd ("display", class_vars, undisplay_command, _("\ 2773 Cancel some expressions to be displayed when program stops.\n\ 2774 Arguments are the code numbers of the expressions to stop displaying.\n\ 2775 No argument means cancel all automatic-display expressions.\n\ 2776 Do \"info display\" to see current list of code numbers."), &deletelist); 2777 2778 add_com ("printf", class_vars, printf_command, _("\ 2779 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\ 2780 This is useful for formatted output in user-defined commands.")); 2781 2782 add_com ("output", class_vars, output_command, _("\ 2783 Like \"print\" but don't put in value history and don't print newline.\n\ 2784 This is useful in user-defined commands.")); 2785 2786 add_prefix_cmd ("set", class_vars, set_command, _("\ 2787 Evaluate expression EXP and assign result to variable VAR, using assignment\n\ 2788 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ 2789 example). VAR may be a debugger \"convenience\" variable (names starting\n\ 2790 with $), a register (a few standard names starting with $), or an actual\n\ 2791 variable in the program being debugged. EXP is any valid expression.\n\ 2792 Use \"set variable\" for variables with names identical to set subcommands.\n\ 2793 \n\ 2794 With a subcommand, this command modifies parts of the gdb environment.\n\ 2795 You can see these environment settings with the \"show\" command."), 2796 &setlist, "set ", 1, &cmdlist); 2797 if (dbx_commands) 2798 add_com ("assign", class_vars, set_command, _("\ 2799 Evaluate expression EXP and assign result to variable VAR, using assignment\n\ 2800 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ 2801 example). VAR may be a debugger \"convenience\" variable (names starting\n\ 2802 with $), a register (a few standard names starting with $), or an actual\n\ 2803 variable in the program being debugged. EXP is any valid expression.\n\ 2804 Use \"set variable\" for variables with names identical to set subcommands.\n\ 2805 \nWith a subcommand, this command modifies parts of the gdb environment.\n\ 2806 You can see these environment settings with the \"show\" command.")); 2807 2808 /* "call" is the same as "set", but handy for dbx users to call fns. */ 2809 c = add_com ("call", class_vars, call_command, _("\ 2810 Call a function in the program.\n\ 2811 The argument is the function name and arguments, in the notation of the\n\ 2812 current working language. The result is printed and saved in the value\n\ 2813 history, if it is not void.")); 2814 set_cmd_completer (c, expression_completer); 2815 2816 add_cmd ("variable", class_vars, set_command, _("\ 2817 Evaluate expression EXP and assign result to variable VAR, using assignment\n\ 2818 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ 2819 example). VAR may be a debugger \"convenience\" variable (names starting\n\ 2820 with $), a register (a few standard names starting with $), or an actual\n\ 2821 variable in the program being debugged. EXP is any valid expression.\n\ 2822 This may usually be abbreviated to simply \"set\"."), 2823 &setlist); 2824 2825 c = add_com ("print", class_vars, print_command, _("\ 2826 Print value of expression EXP.\n\ 2827 Variables accessible are those of the lexical environment of the selected\n\ 2828 stack frame, plus all those whose scope is global or an entire file.\n\ 2829 \n\ 2830 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\ 2831 $$NUM refers to NUM'th value back from the last one.\n\ 2832 Names starting with $ refer to registers (with the values they would have\n\ 2833 if the program were to return to the stack frame now selected, restoring\n\ 2834 all registers saved by frames farther in) or else to debugger\n\ 2835 \"convenience\" variables (any such name not a known register).\n\ 2836 Use assignment expressions to give values to convenience variables.\n\ 2837 \n\ 2838 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\ 2839 @ is a binary operator for treating consecutive data objects\n\ 2840 anywhere in memory as an array. FOO@NUM gives an array whose first\n\ 2841 element is FOO, whose second element is stored in the space following\n\ 2842 where FOO is stored, etc. FOO must be an expression whose value\n\ 2843 resides in memory.\n\ 2844 \n\ 2845 EXP may be preceded with /FMT, where FMT is a format letter\n\ 2846 but no count or size letter (see \"x\" command).")); 2847 set_cmd_completer (c, expression_completer); 2848 add_com_alias ("p", "print", class_vars, 1); 2849 2850 c = add_com ("inspect", class_vars, inspect_command, _("\ 2851 Same as \"print\" command, except that if you are running in the epoch\n\ 2852 environment, the value is printed in its own window.")); 2853 set_cmd_completer (c, expression_completer); 2854 2855 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class, 2856 &max_symbolic_offset, _("\ 2857 Set the largest offset that will be printed in <symbol+1234> form."), _("\ 2858 Show the largest offset that will be printed in <symbol+1234> form."), NULL, 2859 NULL, 2860 show_max_symbolic_offset, 2861 &setprintlist, &showprintlist); 2862 add_setshow_boolean_cmd ("symbol-filename", no_class, 2863 &print_symbol_filename, _("\ 2864 Set printing of source filename and line number with <symbol>."), _("\ 2865 Show printing of source filename and line number with <symbol>."), NULL, 2866 NULL, 2867 show_print_symbol_filename, 2868 &setprintlist, &showprintlist); 2869 2870 add_com ("eval", no_class, eval_command, _("\ 2871 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\ 2872 a command line, and call it.")); 2873 } 2874