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 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 53 #ifdef TUI 54 #include "tui/tui.h" /* For tui_active et.al. */ 55 #endif 56 57 #if defined(__MINGW32__) && !defined(PRINTF_HAS_LONG_LONG) 58 # define USE_PRINTF_I64 1 59 # define PRINTF_HAS_LONG_LONG 60 #else 61 # define USE_PRINTF_I64 0 62 #endif 63 64 extern int asm_demangle; /* Whether to demangle syms in asm printouts */ 65 66 struct format_data 67 { 68 int count; 69 char format; 70 char size; 71 72 /* True if the value should be printed raw -- that is, bypassing 73 python-based formatters. */ 74 unsigned char raw; 75 }; 76 77 /* Last specified output format. */ 78 79 static char last_format = 0; 80 81 /* Last specified examination size. 'b', 'h', 'w' or `q'. */ 82 83 static char last_size = 'w'; 84 85 /* Default address to examine next, and associated architecture. */ 86 87 static struct gdbarch *next_gdbarch; 88 static CORE_ADDR next_address; 89 90 /* Number of delay instructions following current disassembled insn. */ 91 92 static int branch_delay_insns; 93 94 /* Last address examined. */ 95 96 static CORE_ADDR last_examine_address; 97 98 /* Contents of last address examined. 99 This is not valid past the end of the `x' command! */ 100 101 static struct value *last_examine_value; 102 103 /* Largest offset between a symbolic value and an address, that will be 104 printed as `0x1234 <symbol+offset>'. */ 105 106 static unsigned int max_symbolic_offset = UINT_MAX; 107 static void 108 show_max_symbolic_offset (struct ui_file *file, int from_tty, 109 struct cmd_list_element *c, const char *value) 110 { 111 fprintf_filtered (file, _("\ 112 The largest offset that will be printed in <symbol+1234> form is %s.\n"), 113 value); 114 } 115 116 /* Append the source filename and linenumber of the symbol when 117 printing a symbolic value as `<symbol at filename:linenum>' if set. */ 118 static int print_symbol_filename = 0; 119 static void 120 show_print_symbol_filename (struct ui_file *file, int from_tty, 121 struct cmd_list_element *c, const char *value) 122 { 123 fprintf_filtered (file, _("\ 124 Printing of source filename and line number with <symbol> is %s.\n"), 125 value); 126 } 127 128 /* Number of auto-display expression currently being displayed. 129 So that we can disable it if we get an error or a signal within it. 130 -1 when not doing one. */ 131 132 int current_display_number; 133 134 struct display 135 { 136 /* Chain link to next auto-display item. */ 137 struct display *next; 138 139 /* The expression as the user typed it. */ 140 char *exp_string; 141 142 /* Expression to be evaluated and displayed. */ 143 struct expression *exp; 144 145 /* Item number of this auto-display item. */ 146 int number; 147 148 /* Display format specified. */ 149 struct format_data format; 150 151 /* Program space associated with `block'. */ 152 struct program_space *pspace; 153 154 /* Innermost block required by this expression when evaluated */ 155 struct block *block; 156 157 /* Status of this display (enabled or disabled) */ 158 int enabled_p; 159 }; 160 161 /* Chain of expressions whose values should be displayed 162 automatically each time the program stops. */ 163 164 static struct display *display_chain; 165 166 static int display_number; 167 168 /* Prototypes for exported functions. */ 169 170 void output_command (char *, int); 171 172 void _initialize_printcmd (void); 173 174 /* Prototypes for local functions. */ 175 176 static void do_one_display (struct display *); 177 178 179 /* Decode a format specification. *STRING_PTR should point to it. 180 OFORMAT and OSIZE are used as defaults for the format and size 181 if none are given in the format specification. 182 If OSIZE is zero, then the size field of the returned value 183 should be set only if a size is explicitly specified by the 184 user. 185 The structure returned describes all the data 186 found in the specification. In addition, *STRING_PTR is advanced 187 past the specification and past all whitespace following it. */ 188 189 static struct format_data 190 decode_format (char **string_ptr, int oformat, int osize) 191 { 192 struct format_data val; 193 char *p = *string_ptr; 194 195 val.format = '?'; 196 val.size = '?'; 197 val.count = 1; 198 val.raw = 0; 199 200 if (*p >= '0' && *p <= '9') 201 val.count = atoi (p); 202 while (*p >= '0' && *p <= '9') 203 p++; 204 205 /* Now process size or format letters that follow. */ 206 207 while (1) 208 { 209 if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g') 210 val.size = *p++; 211 else if (*p == 'r') 212 { 213 val.raw = 1; 214 p++; 215 } 216 else if (*p >= 'a' && *p <= 'z') 217 val.format = *p++; 218 else 219 break; 220 } 221 222 while (*p == ' ' || *p == '\t') 223 p++; 224 *string_ptr = p; 225 226 /* Set defaults for format and size if not specified. */ 227 if (val.format == '?') 228 { 229 if (val.size == '?') 230 { 231 /* Neither has been specified. */ 232 val.format = oformat; 233 val.size = osize; 234 } 235 else 236 /* If a size is specified, any format makes a reasonable 237 default except 'i'. */ 238 val.format = oformat == 'i' ? 'x' : oformat; 239 } 240 else if (val.size == '?') 241 switch (val.format) 242 { 243 case 'a': 244 /* Pick the appropriate size for an address. This is deferred 245 until do_examine when we know the actual architecture to use. 246 A special size value of 'a' is used to indicate this case. */ 247 val.size = osize ? 'a' : osize; 248 break; 249 case 'f': 250 /* Floating point has to be word or giantword. */ 251 if (osize == 'w' || osize == 'g') 252 val.size = osize; 253 else 254 /* Default it to giantword if the last used size is not 255 appropriate. */ 256 val.size = osize ? 'g' : osize; 257 break; 258 case 'c': 259 /* Characters default to one byte. */ 260 val.size = osize ? 'b' : osize; 261 break; 262 case 's': 263 /* Display strings with byte size chars unless explicitly specified. */ 264 val.size = '\0'; 265 break; 266 267 default: 268 /* The default is the size most recently specified. */ 269 val.size = osize; 270 } 271 272 return val; 273 } 274 275 /* Print value VAL on stream according to OPTIONS. 276 Do not end with a newline. 277 SIZE is the letter for the size of datum being printed. 278 This is used to pad hex numbers so they line up. SIZE is 0 279 for print / output and set for examine. */ 280 281 static void 282 print_formatted (struct value *val, int size, 283 const struct value_print_options *options, 284 struct ui_file *stream) 285 { 286 struct type *type = check_typedef (value_type (val)); 287 int len = TYPE_LENGTH (type); 288 289 if (VALUE_LVAL (val) == lval_memory) 290 next_address = value_address (val) + len; 291 292 if (size) 293 { 294 switch (options->format) 295 { 296 case 's': 297 { 298 struct type *elttype = value_type (val); 299 300 next_address = (value_address (val) 301 + val_print_string (elttype, 302 value_address (val), -1, 303 stream, options) * len); 304 } 305 return; 306 307 case 'i': 308 /* We often wrap here if there are long symbolic names. */ 309 wrap_here (" "); 310 next_address = (value_address (val) 311 + gdb_print_insn (get_type_arch (type), 312 value_address (val), stream, 313 &branch_delay_insns)); 314 return; 315 } 316 } 317 318 if (options->format == 0 || options->format == 's' 319 || TYPE_CODE (type) == TYPE_CODE_REF 320 || TYPE_CODE (type) == TYPE_CODE_ARRAY 321 || TYPE_CODE (type) == TYPE_CODE_STRING 322 || TYPE_CODE (type) == TYPE_CODE_STRUCT 323 || TYPE_CODE (type) == TYPE_CODE_UNION 324 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE) 325 value_print (val, stream, options); 326 else 327 /* User specified format, so don't look to the the type to 328 tell us what to do. */ 329 print_scalar_formatted (value_contents (val), type, 330 options, size, stream); 331 } 332 333 /* Return builtin floating point type of same length as TYPE. 334 If no such type is found, return TYPE itself. */ 335 static struct type * 336 float_type_from_length (struct type *type) 337 { 338 struct gdbarch *gdbarch = get_type_arch (type); 339 const struct builtin_type *builtin = builtin_type (gdbarch); 340 unsigned int len = TYPE_LENGTH (type); 341 342 if (len == TYPE_LENGTH (builtin->builtin_float)) 343 type = builtin->builtin_float; 344 else if (len == TYPE_LENGTH (builtin->builtin_double)) 345 type = builtin->builtin_double; 346 else if (len == TYPE_LENGTH (builtin->builtin_long_double)) 347 type = builtin->builtin_long_double; 348 349 return type; 350 } 351 352 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR, 353 according to OPTIONS and SIZE on STREAM. 354 Formats s and i are not supported at this level. 355 356 This is how the elements of an array or structure are printed 357 with a format. */ 358 359 void 360 print_scalar_formatted (const void *valaddr, struct type *type, 361 const struct value_print_options *options, 362 int size, struct ui_file *stream) 363 { 364 struct gdbarch *gdbarch = get_type_arch (type); 365 LONGEST val_long = 0; 366 unsigned int len = TYPE_LENGTH (type); 367 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); 368 369 /* If we get here with a string format, try again without it. Go 370 all the way back to the language printers, which may call us 371 again. */ 372 if (options->format == 's') 373 { 374 struct value_print_options opts = *options; 375 opts.format = 0; 376 opts.deref_ref = 0; 377 val_print (type, valaddr, 0, 0, stream, 0, NULL, &opts, 378 current_language); 379 return; 380 } 381 382 if (len > sizeof(LONGEST) && 383 (TYPE_CODE (type) == TYPE_CODE_INT 384 || TYPE_CODE (type) == TYPE_CODE_ENUM)) 385 { 386 switch (options->format) 387 { 388 case 'o': 389 print_octal_chars (stream, valaddr, len, byte_order); 390 return; 391 case 'u': 392 case 'd': 393 print_decimal_chars (stream, valaddr, len, byte_order); 394 return; 395 case 't': 396 print_binary_chars (stream, valaddr, len, byte_order); 397 return; 398 case 'x': 399 print_hex_chars (stream, valaddr, len, byte_order); 400 return; 401 case 'c': 402 print_char_chars (stream, type, valaddr, len, byte_order); 403 return; 404 default: 405 break; 406 }; 407 } 408 409 if (options->format != 'f') 410 val_long = unpack_long (type, valaddr); 411 412 /* If the value is a pointer, and pointers and addresses are not the 413 same, then at this point, the value's length (in target bytes) is 414 gdbarch_addr_bit/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */ 415 if (TYPE_CODE (type) == TYPE_CODE_PTR) 416 len = gdbarch_addr_bit (gdbarch) / TARGET_CHAR_BIT; 417 418 /* If we are printing it as unsigned, truncate it in case it is actually 419 a negative signed value (e.g. "print/u (short)-1" should print 65535 420 (if shorts are 16 bits) instead of 4294967295). */ 421 if (options->format != 'd' || TYPE_UNSIGNED (type)) 422 { 423 if (len < sizeof (LONGEST)) 424 val_long &= ((LONGEST) 1 << HOST_CHAR_BIT * len) - 1; 425 } 426 427 switch (options->format) 428 { 429 case 'x': 430 if (!size) 431 { 432 /* No size specified, like in print. Print varying # of digits. */ 433 print_longest (stream, 'x', 1, val_long); 434 } 435 else 436 switch (size) 437 { 438 case 'b': 439 case 'h': 440 case 'w': 441 case 'g': 442 print_longest (stream, size, 1, val_long); 443 break; 444 default: 445 error (_("Undefined output size \"%c\"."), size); 446 } 447 break; 448 449 case 'd': 450 print_longest (stream, 'd', 1, val_long); 451 break; 452 453 case 'u': 454 print_longest (stream, 'u', 0, val_long); 455 break; 456 457 case 'o': 458 if (val_long) 459 print_longest (stream, 'o', 1, val_long); 460 else 461 fprintf_filtered (stream, "0"); 462 break; 463 464 case 'a': 465 { 466 CORE_ADDR addr = unpack_pointer (type, valaddr); 467 468 print_address (gdbarch, addr, stream); 469 } 470 break; 471 472 case 'c': 473 { 474 struct value_print_options opts = *options; 475 476 opts.format = 0; 477 if (TYPE_UNSIGNED (type)) 478 type = builtin_type (gdbarch)->builtin_true_unsigned_char; 479 else 480 type = builtin_type (gdbarch)->builtin_true_char; 481 482 value_print (value_from_longest (type, val_long), stream, &opts); 483 } 484 break; 485 486 case 'f': 487 type = float_type_from_length (type); 488 print_floating (valaddr, type, stream); 489 break; 490 491 case 0: 492 internal_error (__FILE__, __LINE__, 493 _("failed internal consistency check")); 494 495 case 't': 496 /* Binary; 't' stands for "two". */ 497 { 498 char bits[8 * (sizeof val_long) + 1]; 499 char buf[8 * (sizeof val_long) + 32]; 500 char *cp = bits; 501 int width; 502 503 if (!size) 504 width = 8 * (sizeof val_long); 505 else 506 switch (size) 507 { 508 case 'b': 509 width = 8; 510 break; 511 case 'h': 512 width = 16; 513 break; 514 case 'w': 515 width = 32; 516 break; 517 case 'g': 518 width = 64; 519 break; 520 default: 521 error (_("Undefined output size \"%c\"."), size); 522 } 523 524 bits[width] = '\0'; 525 while (width-- > 0) 526 { 527 bits[width] = (val_long & 1) ? '1' : '0'; 528 val_long >>= 1; 529 } 530 if (!size) 531 { 532 while (*cp && *cp == '0') 533 cp++; 534 if (*cp == '\0') 535 cp--; 536 } 537 strcpy (buf, cp); 538 fputs_filtered (buf, stream); 539 } 540 break; 541 542 default: 543 error (_("Undefined output format \"%c\"."), options->format); 544 } 545 } 546 547 /* Specify default address for `x' command. 548 The `info lines' command uses this. */ 549 550 void 551 set_next_address (struct gdbarch *gdbarch, CORE_ADDR addr) 552 { 553 struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr; 554 555 next_gdbarch = gdbarch; 556 next_address = addr; 557 558 /* Make address available to the user as $_. */ 559 set_internalvar (lookup_internalvar ("_"), 560 value_from_pointer (ptr_type, addr)); 561 } 562 563 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM, 564 after LEADIN. Print nothing if no symbolic name is found nearby. 565 Optionally also print source file and line number, if available. 566 DO_DEMANGLE controls whether to print a symbol in its native "raw" form, 567 or to interpret it as a possible C++ name and convert it back to source 568 form. However note that DO_DEMANGLE can be overridden by the specific 569 settings of the demangle and asm_demangle variables. */ 570 571 void 572 print_address_symbolic (struct gdbarch *gdbarch, CORE_ADDR addr, 573 struct ui_file *stream, 574 int do_demangle, char *leadin) 575 { 576 char *name = NULL; 577 char *filename = NULL; 578 int unmapped = 0; 579 int offset = 0; 580 int line = 0; 581 582 /* Throw away both name and filename. */ 583 struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &name); 584 make_cleanup (free_current_contents, &filename); 585 586 if (build_address_symbolic (gdbarch, addr, do_demangle, &name, &offset, 587 &filename, &line, &unmapped)) 588 { 589 do_cleanups (cleanup_chain); 590 return; 591 } 592 593 fputs_filtered (leadin, stream); 594 if (unmapped) 595 fputs_filtered ("<*", stream); 596 else 597 fputs_filtered ("<", stream); 598 fputs_filtered (name, stream); 599 if (offset != 0) 600 fprintf_filtered (stream, "+%u", (unsigned int) offset); 601 602 /* Append source filename and line number if desired. Give specific 603 line # of this addr, if we have it; else line # of the nearest symbol. */ 604 if (print_symbol_filename && filename != NULL) 605 { 606 if (line != -1) 607 fprintf_filtered (stream, " at %s:%d", filename, line); 608 else 609 fprintf_filtered (stream, " in %s", filename); 610 } 611 if (unmapped) 612 fputs_filtered ("*>", stream); 613 else 614 fputs_filtered (">", stream); 615 616 do_cleanups (cleanup_chain); 617 } 618 619 /* Given an address ADDR return all the elements needed to print the 620 address in a symbolic form. NAME can be mangled or not depending 621 on DO_DEMANGLE (and also on the asm_demangle global variable, 622 manipulated via ''set print asm-demangle''). Return 0 in case of 623 success, when all the info in the OUT paramters is valid. Return 1 624 otherwise. */ 625 int 626 build_address_symbolic (struct gdbarch *gdbarch, 627 CORE_ADDR addr, /* IN */ 628 int do_demangle, /* IN */ 629 char **name, /* OUT */ 630 int *offset, /* OUT */ 631 char **filename, /* OUT */ 632 int *line, /* OUT */ 633 int *unmapped) /* OUT */ 634 { 635 struct minimal_symbol *msymbol; 636 struct symbol *symbol; 637 CORE_ADDR name_location = 0; 638 struct obj_section *section = NULL; 639 char *name_temp = ""; 640 641 /* Let's say it is mapped (not unmapped). */ 642 *unmapped = 0; 643 644 /* Determine if the address is in an overlay, and whether it is 645 mapped. */ 646 if (overlay_debugging) 647 { 648 section = find_pc_overlay (addr); 649 if (pc_in_unmapped_range (addr, section)) 650 { 651 *unmapped = 1; 652 addr = overlay_mapped_address (addr, section); 653 } 654 } 655 656 /* First try to find the address in the symbol table, then 657 in the minsyms. Take the closest one. */ 658 659 /* This is defective in the sense that it only finds text symbols. So 660 really this is kind of pointless--we should make sure that the 661 minimal symbols have everything we need (by changing that we could 662 save some memory, but for many debug format--ELF/DWARF or 663 anything/stabs--it would be inconvenient to eliminate those minimal 664 symbols anyway). */ 665 msymbol = lookup_minimal_symbol_by_pc_section (addr, section); 666 symbol = find_pc_sect_function (addr, section); 667 668 if (symbol) 669 { 670 /* If this is a function (i.e. a code address), strip out any 671 non-address bits. For instance, display a pointer to the 672 first instruction of a Thumb function as <function>; the 673 second instruction will be <function+2>, even though the 674 pointer is <function+3>. This matches the ISA behavior. */ 675 addr = gdbarch_addr_bits_remove (gdbarch, addr); 676 677 name_location = BLOCK_START (SYMBOL_BLOCK_VALUE (symbol)); 678 if (do_demangle || asm_demangle) 679 name_temp = SYMBOL_PRINT_NAME (symbol); 680 else 681 name_temp = SYMBOL_LINKAGE_NAME (symbol); 682 } 683 684 if (msymbol != NULL) 685 { 686 if (SYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL) 687 { 688 /* The msymbol is closer to the address than the symbol; 689 use the msymbol instead. */ 690 symbol = 0; 691 name_location = SYMBOL_VALUE_ADDRESS (msymbol); 692 if (do_demangle || asm_demangle) 693 name_temp = SYMBOL_PRINT_NAME (msymbol); 694 else 695 name_temp = SYMBOL_LINKAGE_NAME (msymbol); 696 } 697 } 698 if (symbol == NULL && msymbol == NULL) 699 return 1; 700 701 /* If the nearest symbol is too far away, don't print anything symbolic. */ 702 703 /* For when CORE_ADDR is larger than unsigned int, we do math in 704 CORE_ADDR. But when we detect unsigned wraparound in the 705 CORE_ADDR math, we ignore this test and print the offset, 706 because addr+max_symbolic_offset has wrapped through the end 707 of the address space back to the beginning, giving bogus comparison. */ 708 if (addr > name_location + max_symbolic_offset 709 && name_location + max_symbolic_offset > name_location) 710 return 1; 711 712 *offset = addr - name_location; 713 714 *name = xstrdup (name_temp); 715 716 if (print_symbol_filename) 717 { 718 struct symtab_and_line sal; 719 720 sal = find_pc_sect_line (addr, section, 0); 721 722 if (sal.symtab) 723 { 724 *filename = xstrdup (sal.symtab->filename); 725 *line = sal.line; 726 } 727 } 728 return 0; 729 } 730 731 732 /* Print address ADDR symbolically on STREAM. 733 First print it as a number. Then perhaps print 734 <SYMBOL + OFFSET> after the number. */ 735 736 void 737 print_address (struct gdbarch *gdbarch, 738 CORE_ADDR addr, struct ui_file *stream) 739 { 740 fputs_filtered (paddress (gdbarch, addr), stream); 741 print_address_symbolic (gdbarch, addr, stream, asm_demangle, " "); 742 } 743 744 /* Return a prefix for instruction address: 745 "=> " for current instruction, else " ". */ 746 747 const char * 748 pc_prefix (CORE_ADDR addr) 749 { 750 if (has_stack_frames ()) 751 { 752 struct frame_info *frame; 753 CORE_ADDR pc; 754 755 frame = get_selected_frame (NULL); 756 pc = get_frame_pc (frame); 757 758 if (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 size '%c', using 'b' \ 859 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, gdb_stdout); 1277 break; 1278 1279 case LOC_REGISTER: 1280 /* GDBARCH is the architecture associated with the objfile the symbol 1281 is defined in; the target architecture may be different, and may 1282 provide additional registers. However, we do not know the target 1283 architecture at this point. We assume the objfile architecture 1284 will contain all the standard registers that occur in debug info 1285 in that objfile. */ 1286 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch); 1287 1288 if (SYMBOL_IS_ARGUMENT (sym)) 1289 printf_filtered (_("an argument in register %s"), 1290 gdbarch_register_name (gdbarch, regno)); 1291 else 1292 printf_filtered (_("a variable in register %s"), 1293 gdbarch_register_name (gdbarch, regno)); 1294 break; 1295 1296 case LOC_STATIC: 1297 printf_filtered (_("static storage at address ")); 1298 load_addr = SYMBOL_VALUE_ADDRESS (sym); 1299 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1300 if (section_is_overlay (section)) 1301 { 1302 load_addr = overlay_unmapped_address (load_addr, section); 1303 printf_filtered (_(",\n -- loaded at ")); 1304 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1305 printf_filtered (_(" in overlay section %s"), 1306 section->the_bfd_section->name); 1307 } 1308 break; 1309 1310 case LOC_REGPARM_ADDR: 1311 /* Note comment at LOC_REGISTER. */ 1312 regno = SYMBOL_REGISTER_OPS (sym)->register_number (sym, gdbarch); 1313 printf_filtered (_("address of an argument in register %s"), 1314 gdbarch_register_name (gdbarch, regno)); 1315 break; 1316 1317 case LOC_ARG: 1318 printf_filtered (_("an argument at offset %ld"), val); 1319 break; 1320 1321 case LOC_LOCAL: 1322 printf_filtered (_("a local variable at frame offset %ld"), val); 1323 break; 1324 1325 case LOC_REF_ARG: 1326 printf_filtered (_("a reference argument at offset %ld"), val); 1327 break; 1328 1329 case LOC_TYPEDEF: 1330 printf_filtered (_("a typedef")); 1331 break; 1332 1333 case LOC_BLOCK: 1334 printf_filtered (_("a function at address ")); 1335 load_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym)); 1336 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1337 if (section_is_overlay (section)) 1338 { 1339 load_addr = overlay_unmapped_address (load_addr, section); 1340 printf_filtered (_(",\n -- loaded at ")); 1341 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1342 printf_filtered (_(" in overlay section %s"), 1343 section->the_bfd_section->name); 1344 } 1345 break; 1346 1347 case LOC_UNRESOLVED: 1348 { 1349 struct minimal_symbol *msym; 1350 1351 msym = lookup_minimal_symbol (SYMBOL_LINKAGE_NAME (sym), NULL, NULL); 1352 if (msym == NULL) 1353 printf_filtered ("unresolved"); 1354 else 1355 { 1356 section = SYMBOL_OBJ_SECTION (msym); 1357 load_addr = SYMBOL_VALUE_ADDRESS (msym); 1358 1359 if (section 1360 && (section->the_bfd_section->flags & SEC_THREAD_LOCAL) != 0) 1361 printf_filtered (_("a thread-local variable at offset %s " 1362 "in the thread-local storage for `%s'"), 1363 paddress (gdbarch, load_addr), 1364 section->objfile->name); 1365 else 1366 { 1367 printf_filtered (_("static storage at address ")); 1368 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1369 if (section_is_overlay (section)) 1370 { 1371 load_addr = overlay_unmapped_address (load_addr, section); 1372 printf_filtered (_(",\n -- loaded at ")); 1373 fputs_filtered (paddress (gdbarch, load_addr), gdb_stdout); 1374 printf_filtered (_(" in overlay section %s"), 1375 section->the_bfd_section->name); 1376 } 1377 } 1378 } 1379 } 1380 break; 1381 1382 case LOC_OPTIMIZED_OUT: 1383 printf_filtered (_("optimized out")); 1384 break; 1385 1386 default: 1387 printf_filtered (_("of unknown (botched) type")); 1388 break; 1389 } 1390 printf_filtered (".\n"); 1391 } 1392 1393 1394 static void 1395 x_command (char *exp, int from_tty) 1396 { 1397 struct expression *expr; 1398 struct format_data fmt; 1399 struct cleanup *old_chain; 1400 struct value *val; 1401 1402 fmt.format = last_format ? last_format : 'x'; 1403 fmt.size = last_size; 1404 fmt.count = 1; 1405 fmt.raw = 0; 1406 1407 if (exp && *exp == '/') 1408 { 1409 exp++; 1410 fmt = decode_format (&exp, last_format, last_size); 1411 } 1412 1413 /* If we have an expression, evaluate it and use it as the address. */ 1414 1415 if (exp != 0 && *exp != 0) 1416 { 1417 expr = parse_expression (exp); 1418 /* Cause expression not to be there any more if this command is 1419 repeated with Newline. But don't clobber a user-defined 1420 command's definition. */ 1421 if (from_tty) 1422 *exp = 0; 1423 old_chain = make_cleanup (free_current_contents, &expr); 1424 val = evaluate_expression (expr); 1425 if (TYPE_CODE (value_type (val)) == TYPE_CODE_REF) 1426 val = coerce_ref (val); 1427 /* In rvalue contexts, such as this, functions are coerced into 1428 pointers to functions. This makes "x/i main" work. */ 1429 if (/* last_format == 'i' && */ 1430 TYPE_CODE (value_type (val)) == TYPE_CODE_FUNC 1431 && VALUE_LVAL (val) == lval_memory) 1432 next_address = value_address (val); 1433 else 1434 next_address = value_as_address (val); 1435 1436 next_gdbarch = expr->gdbarch; 1437 do_cleanups (old_chain); 1438 } 1439 1440 if (!next_gdbarch) 1441 error_no_arg (_("starting display address")); 1442 1443 do_examine (fmt, next_gdbarch, next_address); 1444 1445 /* If the examine succeeds, we remember its size and format for next 1446 time. Set last_size to 'b' for strings. */ 1447 if (fmt.format == 's') 1448 last_size = 'b'; 1449 else 1450 last_size = fmt.size; 1451 last_format = fmt.format; 1452 1453 /* Set a couple of internal variables if appropriate. */ 1454 if (last_examine_value) 1455 { 1456 /* Make last address examined available to the user as $_. Use 1457 the correct pointer type. */ 1458 struct type *pointer_type 1459 = lookup_pointer_type (value_type (last_examine_value)); 1460 set_internalvar (lookup_internalvar ("_"), 1461 value_from_pointer (pointer_type, 1462 last_examine_address)); 1463 1464 /* Make contents of last address examined available to the user 1465 as $__. If the last value has not been fetched from memory 1466 then don't fetch it now; instead mark it by voiding the $__ 1467 variable. */ 1468 if (value_lazy (last_examine_value)) 1469 clear_internalvar (lookup_internalvar ("__")); 1470 else 1471 set_internalvar (lookup_internalvar ("__"), last_examine_value); 1472 } 1473 } 1474 1475 1476 /* Add an expression to the auto-display chain. 1477 Specify the expression. */ 1478 1479 static void 1480 display_command (char *exp, int from_tty) 1481 { 1482 struct format_data fmt; 1483 struct expression *expr; 1484 struct display *new; 1485 int display_it = 1; 1486 1487 #if defined(TUI) 1488 /* NOTE: cagney/2003-02-13 The `tui_active' was previously 1489 `tui_version'. */ 1490 if (tui_active && exp != NULL && *exp == '$') 1491 display_it = (tui_set_layout_for_display_command (exp) == TUI_FAILURE); 1492 #endif 1493 1494 if (display_it) 1495 { 1496 if (exp == 0) 1497 { 1498 do_displays (); 1499 return; 1500 } 1501 1502 if (*exp == '/') 1503 { 1504 exp++; 1505 fmt = decode_format (&exp, 0, 0); 1506 if (fmt.size && fmt.format == 0) 1507 fmt.format = 'x'; 1508 if (fmt.format == 'i' || fmt.format == 's') 1509 fmt.size = 'b'; 1510 } 1511 else 1512 { 1513 fmt.format = 0; 1514 fmt.size = 0; 1515 fmt.count = 0; 1516 fmt.raw = 0; 1517 } 1518 1519 innermost_block = NULL; 1520 expr = parse_expression (exp); 1521 1522 new = (struct display *) xmalloc (sizeof (struct display)); 1523 1524 new->exp_string = xstrdup (exp); 1525 new->exp = expr; 1526 new->block = innermost_block; 1527 new->pspace = current_program_space; 1528 new->next = display_chain; 1529 new->number = ++display_number; 1530 new->format = fmt; 1531 new->enabled_p = 1; 1532 display_chain = new; 1533 1534 if (from_tty && target_has_execution) 1535 do_one_display (new); 1536 1537 dont_repeat (); 1538 } 1539 } 1540 1541 static void 1542 free_display (struct display *d) 1543 { 1544 xfree (d->exp_string); 1545 xfree (d->exp); 1546 xfree (d); 1547 } 1548 1549 /* Clear out the display_chain. Done when new symtabs are loaded, 1550 since this invalidates the types stored in many expressions. */ 1551 1552 void 1553 clear_displays (void) 1554 { 1555 struct display *d; 1556 1557 while ((d = display_chain) != NULL) 1558 { 1559 display_chain = d->next; 1560 free_display (d); 1561 } 1562 } 1563 1564 /* Delete the auto-display number NUM. */ 1565 1566 static void 1567 delete_display (int num) 1568 { 1569 struct display *d1, *d; 1570 1571 if (!display_chain) 1572 error (_("No display number %d."), num); 1573 1574 if (display_chain->number == num) 1575 { 1576 d1 = display_chain; 1577 display_chain = d1->next; 1578 free_display (d1); 1579 } 1580 else 1581 for (d = display_chain;; d = d->next) 1582 { 1583 if (d->next == 0) 1584 error (_("No display number %d."), num); 1585 if (d->next->number == num) 1586 { 1587 d1 = d->next; 1588 d->next = d1->next; 1589 free_display (d1); 1590 break; 1591 } 1592 } 1593 } 1594 1595 /* Delete some values from the auto-display chain. 1596 Specify the element numbers. */ 1597 1598 static void 1599 undisplay_command (char *args, int from_tty) 1600 { 1601 char *p = args; 1602 char *p1; 1603 int num; 1604 1605 if (args == 0) 1606 { 1607 if (query (_("Delete all auto-display expressions? "))) 1608 clear_displays (); 1609 dont_repeat (); 1610 return; 1611 } 1612 1613 while (*p) 1614 { 1615 p1 = p; 1616 while (*p1 >= '0' && *p1 <= '9') 1617 p1++; 1618 if (*p1 && *p1 != ' ' && *p1 != '\t') 1619 error (_("Arguments must be display numbers.")); 1620 1621 num = atoi (p); 1622 1623 delete_display (num); 1624 1625 p = p1; 1626 while (*p == ' ' || *p == '\t') 1627 p++; 1628 } 1629 dont_repeat (); 1630 } 1631 1632 /* Display a single auto-display. 1633 Do nothing if the display cannot be printed in the current context, 1634 or if the display is disabled. */ 1635 1636 static void 1637 do_one_display (struct display *d) 1638 { 1639 int within_current_scope; 1640 1641 if (d->enabled_p == 0) 1642 return; 1643 1644 /* The expression carries the architecture that was used at parse time. 1645 This is a problem if the expression depends on architecture features 1646 (e.g. register numbers), and the current architecture is now different. 1647 For example, a display statement like "display/i $pc" is expected to 1648 display the PC register of the current architecture, not the arch at 1649 the time the display command was given. Therefore, we re-parse the 1650 expression if the current architecture has changed. */ 1651 if (d->exp != NULL && d->exp->gdbarch != get_current_arch ()) 1652 { 1653 xfree (d->exp); 1654 d->exp = NULL; 1655 d->block = NULL; 1656 } 1657 1658 if (d->exp == NULL) 1659 { 1660 volatile struct gdb_exception ex; 1661 1662 TRY_CATCH (ex, RETURN_MASK_ALL) 1663 { 1664 innermost_block = NULL; 1665 d->exp = parse_expression (d->exp_string); 1666 d->block = innermost_block; 1667 } 1668 if (ex.reason < 0) 1669 { 1670 /* Can't re-parse the expression. Disable this display item. */ 1671 d->enabled_p = 0; 1672 warning (_("Unable to display \"%s\": %s"), 1673 d->exp_string, ex.message); 1674 return; 1675 } 1676 } 1677 1678 if (d->block) 1679 { 1680 if (d->pspace == current_program_space) 1681 within_current_scope = contained_in (get_selected_block (0), d->block); 1682 else 1683 within_current_scope = 0; 1684 } 1685 else 1686 within_current_scope = 1; 1687 if (!within_current_scope) 1688 return; 1689 1690 current_display_number = d->number; 1691 1692 annotate_display_begin (); 1693 printf_filtered ("%d", d->number); 1694 annotate_display_number_end (); 1695 printf_filtered (": "); 1696 if (d->format.size) 1697 { 1698 CORE_ADDR addr; 1699 struct value *val; 1700 1701 annotate_display_format (); 1702 1703 printf_filtered ("x/"); 1704 if (d->format.count != 1) 1705 printf_filtered ("%d", d->format.count); 1706 printf_filtered ("%c", d->format.format); 1707 if (d->format.format != 'i' && d->format.format != 's') 1708 printf_filtered ("%c", d->format.size); 1709 printf_filtered (" "); 1710 1711 annotate_display_expression (); 1712 1713 puts_filtered (d->exp_string); 1714 annotate_display_expression_end (); 1715 1716 if (d->format.count != 1 || d->format.format == 'i') 1717 printf_filtered ("\n"); 1718 else 1719 printf_filtered (" "); 1720 1721 val = evaluate_expression (d->exp); 1722 addr = value_as_address (val); 1723 if (d->format.format == 'i') 1724 addr = gdbarch_addr_bits_remove (d->exp->gdbarch, addr); 1725 1726 annotate_display_value (); 1727 1728 do_examine (d->format, d->exp->gdbarch, addr); 1729 } 1730 else 1731 { 1732 struct value_print_options opts; 1733 1734 annotate_display_format (); 1735 1736 if (d->format.format) 1737 printf_filtered ("/%c ", d->format.format); 1738 1739 annotate_display_expression (); 1740 1741 puts_filtered (d->exp_string); 1742 annotate_display_expression_end (); 1743 1744 printf_filtered (" = "); 1745 1746 annotate_display_expression (); 1747 1748 get_formatted_print_options (&opts, d->format.format); 1749 opts.raw = d->format.raw; 1750 print_formatted (evaluate_expression (d->exp), 1751 d->format.size, &opts, gdb_stdout); 1752 printf_filtered ("\n"); 1753 } 1754 1755 annotate_display_end (); 1756 1757 gdb_flush (gdb_stdout); 1758 current_display_number = -1; 1759 } 1760 1761 /* Display all of the values on the auto-display chain which can be 1762 evaluated in the current scope. */ 1763 1764 void 1765 do_displays (void) 1766 { 1767 struct display *d; 1768 1769 for (d = display_chain; d; d = d->next) 1770 do_one_display (d); 1771 } 1772 1773 /* Delete the auto-display which we were in the process of displaying. 1774 This is done when there is an error or a signal. */ 1775 1776 void 1777 disable_display (int num) 1778 { 1779 struct display *d; 1780 1781 for (d = display_chain; d; d = d->next) 1782 if (d->number == num) 1783 { 1784 d->enabled_p = 0; 1785 return; 1786 } 1787 printf_unfiltered (_("No display number %d.\n"), num); 1788 } 1789 1790 void 1791 disable_current_display (void) 1792 { 1793 if (current_display_number >= 0) 1794 { 1795 disable_display (current_display_number); 1796 fprintf_unfiltered (gdb_stderr, _("\ 1797 Disabling display %d to avoid infinite recursion.\n"), 1798 current_display_number); 1799 } 1800 current_display_number = -1; 1801 } 1802 1803 static void 1804 display_info (char *ignore, int from_tty) 1805 { 1806 struct display *d; 1807 1808 if (!display_chain) 1809 printf_unfiltered (_("There are no auto-display expressions now.\n")); 1810 else 1811 printf_filtered (_("Auto-display expressions now in effect:\n\ 1812 Num Enb Expression\n")); 1813 1814 for (d = display_chain; d; d = d->next) 1815 { 1816 printf_filtered ("%d: %c ", d->number, "ny"[(int) d->enabled_p]); 1817 if (d->format.size) 1818 printf_filtered ("/%d%c%c ", d->format.count, d->format.size, 1819 d->format.format); 1820 else if (d->format.format) 1821 printf_filtered ("/%c ", d->format.format); 1822 puts_filtered (d->exp_string); 1823 if (d->block && !contained_in (get_selected_block (0), d->block)) 1824 printf_filtered (_(" (cannot be evaluated in the current context)")); 1825 printf_filtered ("\n"); 1826 gdb_flush (gdb_stdout); 1827 } 1828 } 1829 1830 static void 1831 enable_display (char *args, int from_tty) 1832 { 1833 char *p = args; 1834 char *p1; 1835 int num; 1836 struct display *d; 1837 1838 if (p == 0) 1839 { 1840 for (d = display_chain; d; d = d->next) 1841 d->enabled_p = 1; 1842 } 1843 else 1844 while (*p) 1845 { 1846 p1 = p; 1847 while (*p1 >= '0' && *p1 <= '9') 1848 p1++; 1849 if (*p1 && *p1 != ' ' && *p1 != '\t') 1850 error (_("Arguments must be display numbers.")); 1851 1852 num = atoi (p); 1853 1854 for (d = display_chain; d; d = d->next) 1855 if (d->number == num) 1856 { 1857 d->enabled_p = 1; 1858 goto win; 1859 } 1860 printf_unfiltered (_("No display number %d.\n"), num); 1861 win: 1862 p = p1; 1863 while (*p == ' ' || *p == '\t') 1864 p++; 1865 } 1866 } 1867 1868 static void 1869 disable_display_command (char *args, int from_tty) 1870 { 1871 char *p = args; 1872 char *p1; 1873 struct display *d; 1874 1875 if (p == 0) 1876 { 1877 for (d = display_chain; d; d = d->next) 1878 d->enabled_p = 0; 1879 } 1880 else 1881 while (*p) 1882 { 1883 p1 = p; 1884 while (*p1 >= '0' && *p1 <= '9') 1885 p1++; 1886 if (*p1 && *p1 != ' ' && *p1 != '\t') 1887 error (_("Arguments must be display numbers.")); 1888 1889 disable_display (atoi (p)); 1890 1891 p = p1; 1892 while (*p == ' ' || *p == '\t') 1893 p++; 1894 } 1895 } 1896 1897 /* display_chain items point to blocks and expressions. Some expressions in 1898 turn may point to symbols. 1899 Both symbols and blocks are obstack_alloc'd on objfile_stack, and are 1900 obstack_free'd when a shared library is unloaded. 1901 Clear pointers that are about to become dangling. 1902 Both .exp and .block fields will be restored next time we need to display 1903 an item by re-parsing .exp_string field in the new execution context. */ 1904 1905 static void 1906 clear_dangling_display_expressions (struct so_list *solib) 1907 { 1908 struct objfile *objfile = solib->objfile; 1909 struct display *d; 1910 1911 /* With no symbol file we cannot have a block or expression from it. */ 1912 if (objfile == NULL) 1913 return; 1914 if (objfile->separate_debug_objfile_backlink) 1915 objfile = objfile->separate_debug_objfile_backlink; 1916 gdb_assert (objfile->pspace == solib->pspace); 1917 1918 for (d = display_chain; d != NULL; d = d->next) 1919 { 1920 if (d->pspace != solib->pspace) 1921 continue; 1922 1923 if (lookup_objfile_from_block (d->block) == objfile 1924 || (d->exp && exp_uses_objfile (d->exp, objfile))) 1925 { 1926 xfree (d->exp); 1927 d->exp = NULL; 1928 d->block = NULL; 1929 } 1930 } 1931 } 1932 1933 1934 /* Print the value in stack frame FRAME of a variable specified by a 1935 struct symbol. NAME is the name to print; if NULL then VAR's print 1936 name will be used. STREAM is the ui_file on which to print the 1937 value. INDENT specifies the number of indent levels to print 1938 before printing the variable name. */ 1939 1940 void 1941 print_variable_and_value (const char *name, struct symbol *var, 1942 struct frame_info *frame, 1943 struct ui_file *stream, int indent) 1944 { 1945 volatile struct gdb_exception except; 1946 1947 if (!name) 1948 name = SYMBOL_PRINT_NAME (var); 1949 1950 fprintf_filtered (stream, "%s%s = ", n_spaces (2 * indent), name); 1951 TRY_CATCH (except, RETURN_MASK_ERROR) 1952 { 1953 struct value *val; 1954 struct value_print_options opts; 1955 1956 val = read_var_value (var, frame); 1957 get_user_print_options (&opts); 1958 common_val_print (val, stream, indent, &opts, current_language); 1959 } 1960 if (except.reason < 0) 1961 fprintf_filtered(stream, "<error reading variable %s (%s)>", name, 1962 except.message); 1963 fprintf_filtered (stream, "\n"); 1964 } 1965 1966 /* printf "printf format string" ARG to STREAM. */ 1967 1968 static void 1969 ui_printf (char *arg, struct ui_file *stream) 1970 { 1971 char *f = NULL; 1972 char *s = arg; 1973 char *string = NULL; 1974 struct value **val_args; 1975 char *substrings; 1976 char *current_substring; 1977 int nargs = 0; 1978 int allocated_args = 20; 1979 struct cleanup *old_cleanups; 1980 1981 val_args = xmalloc (allocated_args * sizeof (struct value *)); 1982 old_cleanups = make_cleanup (free_current_contents, &val_args); 1983 1984 if (s == 0) 1985 error_no_arg (_("format-control string and values to print")); 1986 1987 /* Skip white space before format string */ 1988 while (*s == ' ' || *s == '\t') 1989 s++; 1990 1991 /* A format string should follow, enveloped in double quotes. */ 1992 if (*s++ != '"') 1993 error (_("Bad format string, missing '\"'.")); 1994 1995 /* Parse the format-control string and copy it into the string STRING, 1996 processing some kinds of escape sequence. */ 1997 1998 f = string = (char *) alloca (strlen (s) + 1); 1999 2000 while (*s != '"') 2001 { 2002 int c = *s++; 2003 switch (c) 2004 { 2005 case '\0': 2006 error (_("Bad format string, non-terminated '\"'.")); 2007 2008 case '\\': 2009 switch (c = *s++) 2010 { 2011 case '\\': 2012 *f++ = '\\'; 2013 break; 2014 case 'a': 2015 *f++ = '\a'; 2016 break; 2017 case 'b': 2018 *f++ = '\b'; 2019 break; 2020 case 'f': 2021 *f++ = '\f'; 2022 break; 2023 case 'n': 2024 *f++ = '\n'; 2025 break; 2026 case 'r': 2027 *f++ = '\r'; 2028 break; 2029 case 't': 2030 *f++ = '\t'; 2031 break; 2032 case 'v': 2033 *f++ = '\v'; 2034 break; 2035 case '"': 2036 *f++ = '"'; 2037 break; 2038 default: 2039 /* ??? TODO: handle other escape sequences */ 2040 error (_("Unrecognized escape character \\%c in format string."), 2041 c); 2042 } 2043 break; 2044 2045 default: 2046 *f++ = c; 2047 } 2048 } 2049 2050 /* Skip over " and following space and comma. */ 2051 s++; 2052 *f++ = '\0'; 2053 while (*s == ' ' || *s == '\t') 2054 s++; 2055 2056 if (*s != ',' && *s != 0) 2057 error (_("Invalid argument syntax")); 2058 2059 if (*s == ',') 2060 s++; 2061 while (*s == ' ' || *s == '\t') 2062 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 format specifier '%c' in printf"), 2262 *f); 2263 2264 f++; 2265 2266 if (lcount > 1 && USE_PRINTF_I64) 2267 { 2268 /* Windows' printf does support long long, but not the usual way. 2269 Convert %lld to %I64d. */ 2270 int length_before_ll = f - last_arg - 1 - lcount; 2271 2272 strncpy (current_substring, last_arg, length_before_ll); 2273 strcpy (current_substring + length_before_ll, "I64"); 2274 current_substring[length_before_ll + 3] = 2275 last_arg[length_before_ll + lcount]; 2276 current_substring += length_before_ll + 4; 2277 } 2278 else if (this_argclass == wide_string_arg 2279 || this_argclass == wide_char_arg) 2280 { 2281 /* Convert %ls or %lc to %s. */ 2282 int length_before_ls = f - last_arg - 2; 2283 2284 strncpy (current_substring, last_arg, length_before_ls); 2285 strcpy (current_substring + length_before_ls, "s"); 2286 current_substring += length_before_ls + 2; 2287 } 2288 else 2289 { 2290 strncpy (current_substring, last_arg, f - last_arg); 2291 current_substring += f - last_arg; 2292 } 2293 *current_substring++ = '\0'; 2294 last_arg = f; 2295 argclass[nargs_wanted++] = this_argclass; 2296 } 2297 2298 /* Now, parse all arguments and evaluate them. 2299 Store the VALUEs in VAL_ARGS. */ 2300 2301 while (*s != '\0') 2302 { 2303 char *s1; 2304 2305 if (nargs == allocated_args) 2306 val_args = (struct value **) xrealloc ((char *) val_args, 2307 (allocated_args *= 2) 2308 * sizeof (struct value *)); 2309 s1 = s; 2310 val_args[nargs] = parse_to_comma_and_eval (&s1); 2311 2312 nargs++; 2313 s = s1; 2314 if (*s == ',') 2315 s++; 2316 } 2317 2318 if (nargs != nargs_wanted) 2319 error (_("Wrong number of arguments for specified format-string")); 2320 2321 /* Now actually print them. */ 2322 current_substring = substrings; 2323 for (i = 0; i < nargs; i++) 2324 { 2325 switch (argclass[i]) 2326 { 2327 case string_arg: 2328 { 2329 gdb_byte *str; 2330 CORE_ADDR tem; 2331 int j; 2332 2333 tem = value_as_address (val_args[i]); 2334 2335 /* This is a %s argument. Find the length of the string. */ 2336 for (j = 0;; j++) 2337 { 2338 gdb_byte c; 2339 2340 QUIT; 2341 read_memory (tem + j, &c, 1); 2342 if (c == 0) 2343 break; 2344 } 2345 2346 /* Copy the string contents into a string inside GDB. */ 2347 str = (gdb_byte *) alloca (j + 1); 2348 if (j != 0) 2349 read_memory (tem, str, j); 2350 str[j] = 0; 2351 2352 fprintf_filtered (stream, current_substring, (char *) str); 2353 } 2354 break; 2355 case wide_string_arg: 2356 { 2357 gdb_byte *str; 2358 CORE_ADDR tem; 2359 int j; 2360 struct gdbarch *gdbarch 2361 = get_type_arch (value_type (val_args[i])); 2362 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); 2363 struct type *wctype = lookup_typename (current_language, gdbarch, 2364 "wchar_t", NULL, 0); 2365 int wcwidth = TYPE_LENGTH (wctype); 2366 gdb_byte *buf = alloca (wcwidth); 2367 struct obstack output; 2368 struct cleanup *inner_cleanup; 2369 2370 tem = value_as_address (val_args[i]); 2371 2372 /* This is a %s argument. Find the length of the string. */ 2373 for (j = 0;; j += wcwidth) 2374 { 2375 QUIT; 2376 read_memory (tem + j, buf, wcwidth); 2377 if (extract_unsigned_integer (buf, wcwidth, byte_order) == 0) 2378 break; 2379 } 2380 2381 /* Copy the string contents into a string inside GDB. */ 2382 str = (gdb_byte *) alloca (j + wcwidth); 2383 if (j != 0) 2384 read_memory (tem, str, j); 2385 memset (&str[j], 0, wcwidth); 2386 2387 obstack_init (&output); 2388 inner_cleanup = make_cleanup_obstack_free (&output); 2389 2390 convert_between_encodings (target_wide_charset (gdbarch), 2391 host_charset (), 2392 str, j, wcwidth, 2393 &output, translit_char); 2394 obstack_grow_str0 (&output, ""); 2395 2396 fprintf_filtered (stream, current_substring, 2397 obstack_base (&output)); 2398 do_cleanups (inner_cleanup); 2399 } 2400 break; 2401 case wide_char_arg: 2402 { 2403 struct gdbarch *gdbarch 2404 = get_type_arch (value_type (val_args[i])); 2405 struct type *wctype = lookup_typename (current_language, gdbarch, 2406 "wchar_t", NULL, 0); 2407 struct type *valtype; 2408 struct obstack output; 2409 struct cleanup *inner_cleanup; 2410 const gdb_byte *bytes; 2411 2412 valtype = value_type (val_args[i]); 2413 if (TYPE_LENGTH (valtype) != TYPE_LENGTH (wctype) 2414 || TYPE_CODE (valtype) != TYPE_CODE_INT) 2415 error (_("expected wchar_t argument for %%lc")); 2416 2417 bytes = value_contents (val_args[i]); 2418 2419 obstack_init (&output); 2420 inner_cleanup = make_cleanup_obstack_free (&output); 2421 2422 convert_between_encodings (target_wide_charset (gdbarch), 2423 host_charset (), 2424 bytes, TYPE_LENGTH (valtype), 2425 TYPE_LENGTH (valtype), 2426 &output, translit_char); 2427 obstack_grow_str0 (&output, ""); 2428 2429 fprintf_filtered (stream, current_substring, 2430 obstack_base (&output)); 2431 do_cleanups (inner_cleanup); 2432 } 2433 break; 2434 case double_arg: 2435 { 2436 struct type *type = value_type (val_args[i]); 2437 DOUBLEST val; 2438 int inv; 2439 2440 /* If format string wants a float, unchecked-convert the value 2441 to floating point of the same size. */ 2442 type = float_type_from_length (type); 2443 val = unpack_double (type, value_contents (val_args[i]), &inv); 2444 if (inv) 2445 error (_("Invalid floating value found in program.")); 2446 2447 fprintf_filtered (stream, current_substring, (double) val); 2448 break; 2449 } 2450 case long_double_arg: 2451 #ifdef HAVE_LONG_DOUBLE 2452 { 2453 struct type *type = value_type (val_args[i]); 2454 DOUBLEST val; 2455 int inv; 2456 2457 /* If format string wants a float, unchecked-convert the value 2458 to floating point of the same size. */ 2459 type = float_type_from_length (type); 2460 val = unpack_double (type, value_contents (val_args[i]), &inv); 2461 if (inv) 2462 error (_("Invalid floating value found in program.")); 2463 2464 fprintf_filtered (stream, current_substring, 2465 (long double) val); 2466 break; 2467 } 2468 #else 2469 error (_("long double not supported in printf")); 2470 #endif 2471 case long_long_arg: 2472 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG) 2473 { 2474 long long val = value_as_long (val_args[i]); 2475 2476 fprintf_filtered (stream, current_substring, val); 2477 break; 2478 } 2479 #else 2480 error (_("long long not supported in printf")); 2481 #endif 2482 case int_arg: 2483 { 2484 int val = value_as_long (val_args[i]); 2485 2486 fprintf_filtered (stream, current_substring, val); 2487 break; 2488 } 2489 case long_arg: 2490 { 2491 long val = value_as_long (val_args[i]); 2492 2493 fprintf_filtered (stream, current_substring, val); 2494 break; 2495 } 2496 2497 /* Handles decimal floating values. */ 2498 case decfloat_arg: 2499 { 2500 const gdb_byte *param_ptr = value_contents (val_args[i]); 2501 2502 #if defined (PRINTF_HAS_DECFLOAT) 2503 /* If we have native support for Decimal floating 2504 printing, handle it here. */ 2505 fprintf_filtered (stream, current_substring, param_ptr); 2506 #else 2507 2508 /* As a workaround until vasprintf has native support for DFP 2509 we convert the DFP values to string and print them using 2510 the %s format specifier. */ 2511 2512 char *eos, *sos; 2513 int nnull_chars = 0; 2514 2515 /* Parameter data. */ 2516 struct type *param_type = value_type (val_args[i]); 2517 unsigned int param_len = TYPE_LENGTH (param_type); 2518 struct gdbarch *gdbarch = get_type_arch (param_type); 2519 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); 2520 2521 /* DFP output data. */ 2522 struct value *dfp_value = NULL; 2523 gdb_byte *dfp_ptr; 2524 int dfp_len = 16; 2525 gdb_byte dec[16]; 2526 struct type *dfp_type = NULL; 2527 char decstr[MAX_DECIMAL_STRING]; 2528 2529 /* Points to the end of the string so that we can go back 2530 and check for DFP length modifiers. */ 2531 eos = current_substring + strlen (current_substring); 2532 2533 /* Look for the float/double format specifier. */ 2534 while (*eos != 'f' && *eos != 'e' && *eos != 'E' 2535 && *eos != 'g' && *eos != 'G') 2536 eos--; 2537 2538 sos = eos; 2539 2540 /* Search for the '%' char and extract the size and type of 2541 the output decimal value based on its modifiers 2542 (%Hf, %Df, %DDf). */ 2543 while (*--sos != '%') 2544 { 2545 if (*sos == 'H') 2546 { 2547 dfp_len = 4; 2548 dfp_type = builtin_type (gdbarch)->builtin_decfloat; 2549 } 2550 else if (*sos == 'D' && *(sos - 1) == 'D') 2551 { 2552 dfp_len = 16; 2553 dfp_type = builtin_type (gdbarch)->builtin_declong; 2554 sos--; 2555 } 2556 else 2557 { 2558 dfp_len = 8; 2559 dfp_type = builtin_type (gdbarch)->builtin_decdouble; 2560 } 2561 } 2562 2563 /* Replace %Hf, %Df and %DDf with %s's. */ 2564 *++sos = 's'; 2565 2566 /* Go through the whole format string and pull the correct 2567 number of chars back to compensate for the change in the 2568 format specifier. */ 2569 while (nnull_chars < nargs - i) 2570 { 2571 if (*eos == '\0') 2572 nnull_chars++; 2573 2574 *++sos = *++eos; 2575 } 2576 2577 /* Conversion between different DFP types. */ 2578 if (TYPE_CODE (param_type) == TYPE_CODE_DECFLOAT) 2579 decimal_convert (param_ptr, param_len, byte_order, 2580 dec, dfp_len, byte_order); 2581 else 2582 /* If this is a non-trivial conversion, just output 0. 2583 A correct converted value can be displayed by explicitly 2584 casting to a DFP type. */ 2585 decimal_from_string (dec, dfp_len, byte_order, "0"); 2586 2587 dfp_value = value_from_decfloat (dfp_type, dec); 2588 2589 dfp_ptr = (gdb_byte *) value_contents (dfp_value); 2590 2591 decimal_to_string (dfp_ptr, dfp_len, byte_order, decstr); 2592 2593 /* Print the DFP value. */ 2594 fprintf_filtered (stream, current_substring, decstr); 2595 2596 break; 2597 #endif 2598 } 2599 2600 case ptr_arg: 2601 { 2602 /* We avoid the host's %p because pointers are too 2603 likely to be the wrong size. The only interesting 2604 modifier for %p is a width; extract that, and then 2605 handle %p as glibc would: %#x or a literal "(nil)". */ 2606 2607 char *p, *fmt, *fmt_p; 2608 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG) 2609 long long val = value_as_long (val_args[i]); 2610 #else 2611 long val = value_as_long (val_args[i]); 2612 #endif 2613 2614 fmt = alloca (strlen (current_substring) + 5); 2615 2616 /* Copy up to the leading %. */ 2617 p = current_substring; 2618 fmt_p = fmt; 2619 while (*p) 2620 { 2621 int is_percent = (*p == '%'); 2622 2623 *fmt_p++ = *p++; 2624 if (is_percent) 2625 { 2626 if (*p == '%') 2627 *fmt_p++ = *p++; 2628 else 2629 break; 2630 } 2631 } 2632 2633 if (val != 0) 2634 *fmt_p++ = '#'; 2635 2636 /* Copy any width. */ 2637 while (*p >= '0' && *p < '9') 2638 *fmt_p++ = *p++; 2639 2640 gdb_assert (*p == 'p' && *(p + 1) == '\0'); 2641 if (val != 0) 2642 { 2643 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG) 2644 *fmt_p++ = 'l'; 2645 #endif 2646 *fmt_p++ = 'l'; 2647 *fmt_p++ = 'x'; 2648 *fmt_p++ = '\0'; 2649 fprintf_filtered (stream, fmt, val); 2650 } 2651 else 2652 { 2653 *fmt_p++ = 's'; 2654 *fmt_p++ = '\0'; 2655 fprintf_filtered (stream, fmt, "(nil)"); 2656 } 2657 2658 break; 2659 } 2660 default: 2661 internal_error (__FILE__, __LINE__, 2662 _("failed internal consistency check")); 2663 } 2664 /* Skip to the next substring. */ 2665 current_substring += strlen (current_substring) + 1; 2666 } 2667 /* Print the portion of the format string after the last argument. 2668 Note that this will not include any ordinary %-specs, but it 2669 might include "%%". That is why we use printf_filtered and not 2670 puts_filtered here. Also, we pass a dummy argument because 2671 some platforms have modified GCC to include -Wformat-security 2672 by default, which will warn here if there is no argument. */ 2673 fprintf_filtered (stream, last_arg, 0); 2674 } 2675 do_cleanups (old_cleanups); 2676 } 2677 2678 /* Implement the "printf" command. */ 2679 2680 static void 2681 printf_command (char *arg, int from_tty) 2682 { 2683 ui_printf (arg, gdb_stdout); 2684 } 2685 2686 /* Implement the "eval" command. */ 2687 2688 static void 2689 eval_command (char *arg, int from_tty) 2690 { 2691 struct ui_file *ui_out = mem_fileopen (); 2692 struct cleanup *cleanups = make_cleanup_ui_file_delete (ui_out); 2693 char *expanded; 2694 2695 ui_printf (arg, ui_out); 2696 2697 expanded = ui_file_xstrdup (ui_out, NULL); 2698 make_cleanup (xfree, expanded); 2699 2700 execute_command (expanded, from_tty); 2701 2702 do_cleanups (cleanups); 2703 } 2704 2705 void 2706 _initialize_printcmd (void) 2707 { 2708 struct cmd_list_element *c; 2709 2710 current_display_number = -1; 2711 2712 observer_attach_solib_unloaded (clear_dangling_display_expressions); 2713 2714 add_info ("address", address_info, 2715 _("Describe where symbol SYM is stored.")); 2716 2717 add_info ("symbol", sym_info, _("\ 2718 Describe what symbol is at location ADDR.\n\ 2719 Only for symbols with fixed locations (global or static scope).")); 2720 2721 add_com ("x", class_vars, x_command, _("\ 2722 Examine memory: x/FMT ADDRESS.\n\ 2723 ADDRESS is an expression for the memory address to examine.\n\ 2724 FMT is a repeat count followed by a format letter and a size letter.\n\ 2725 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\ 2726 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n\ 2727 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\ 2728 The specified number of objects of the specified size are printed\n\ 2729 according to the format.\n\n\ 2730 Defaults for format and size letters are those previously used.\n\ 2731 Default count is 1. Default address is following last thing printed\n\ 2732 with this command or \"print\".")); 2733 2734 #if 0 2735 add_com ("whereis", class_vars, whereis_command, 2736 _("Print line number and file of definition of variable.")); 2737 #endif 2738 2739 add_info ("display", display_info, _("\ 2740 Expressions to display when program stops, with code numbers.")); 2741 2742 add_cmd ("undisplay", class_vars, undisplay_command, _("\ 2743 Cancel some expressions to be displayed when program stops.\n\ 2744 Arguments are the code numbers of the expressions to stop displaying.\n\ 2745 No argument means cancel all automatic-display expressions.\n\ 2746 \"delete display\" has the same effect as this command.\n\ 2747 Do \"info display\" to see current list of code numbers."), 2748 &cmdlist); 2749 2750 add_com ("display", class_vars, display_command, _("\ 2751 Print value of expression EXP each time the program stops.\n\ 2752 /FMT may be used before EXP as in the \"print\" command.\n\ 2753 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\ 2754 as in the \"x\" command, and then EXP is used to get the address to examine\n\ 2755 and examining is done as in the \"x\" command.\n\n\ 2756 With no argument, display all currently requested auto-display expressions.\n\ 2757 Use \"undisplay\" to cancel display requests previously made.")); 2758 2759 add_cmd ("display", class_vars, enable_display, _("\ 2760 Enable some expressions to be displayed when program stops.\n\ 2761 Arguments are the code numbers of the expressions to resume displaying.\n\ 2762 No argument means enable all automatic-display expressions.\n\ 2763 Do \"info display\" to see current list of code numbers."), &enablelist); 2764 2765 add_cmd ("display", class_vars, disable_display_command, _("\ 2766 Disable some expressions to be displayed when program stops.\n\ 2767 Arguments are the code numbers of the expressions to stop displaying.\n\ 2768 No argument means disable all automatic-display expressions.\n\ 2769 Do \"info display\" to see current list of code numbers."), &disablelist); 2770 2771 add_cmd ("display", class_vars, undisplay_command, _("\ 2772 Cancel some expressions to be displayed when program stops.\n\ 2773 Arguments are the code numbers of the expressions to stop displaying.\n\ 2774 No argument means cancel all automatic-display expressions.\n\ 2775 Do \"info display\" to see current list of code numbers."), &deletelist); 2776 2777 add_com ("printf", class_vars, printf_command, _("\ 2778 printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\ 2779 This is useful for formatted output in user-defined commands.")); 2780 2781 add_com ("output", class_vars, output_command, _("\ 2782 Like \"print\" but don't put in value history and don't print newline.\n\ 2783 This is useful in user-defined commands.")); 2784 2785 add_prefix_cmd ("set", class_vars, set_command, _("\ 2786 Evaluate expression EXP and assign result to variable VAR, using assignment\n\ 2787 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ 2788 example). VAR may be a debugger \"convenience\" variable (names starting\n\ 2789 with $), a register (a few standard names starting with $), or an actual\n\ 2790 variable in the program being debugged. EXP is any valid expression.\n\ 2791 Use \"set variable\" for variables with names identical to set subcommands.\n\ 2792 \n\ 2793 With a subcommand, this command modifies parts of the gdb environment.\n\ 2794 You can see these environment settings with the \"show\" command."), 2795 &setlist, "set ", 1, &cmdlist); 2796 if (dbx_commands) 2797 add_com ("assign", class_vars, set_command, _("\ 2798 Evaluate expression EXP and assign result to variable VAR, using assignment\n\ 2799 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ 2800 example). VAR may be a debugger \"convenience\" variable (names starting\n\ 2801 with $), a register (a few standard names starting with $), or an actual\n\ 2802 variable in the program being debugged. EXP is any valid expression.\n\ 2803 Use \"set variable\" for variables with names identical to set subcommands.\n\ 2804 \nWith a subcommand, this command modifies parts of the gdb environment.\n\ 2805 You can see these environment settings with the \"show\" command.")); 2806 2807 /* "call" is the same as "set", but handy for dbx users to call fns. */ 2808 c = add_com ("call", class_vars, call_command, _("\ 2809 Call a function in the program.\n\ 2810 The argument is the function name and arguments, in the notation of the\n\ 2811 current working language. The result is printed and saved in the value\n\ 2812 history, if it is not void.")); 2813 set_cmd_completer (c, expression_completer); 2814 2815 add_cmd ("variable", class_vars, set_command, _("\ 2816 Evaluate expression EXP and assign result to variable VAR, using assignment\n\ 2817 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\ 2818 example). VAR may be a debugger \"convenience\" variable (names starting\n\ 2819 with $), a register (a few standard names starting with $), or an actual\n\ 2820 variable in the program being debugged. EXP is any valid expression.\n\ 2821 This may usually be abbreviated to simply \"set\"."), 2822 &setlist); 2823 2824 c = add_com ("print", class_vars, print_command, _("\ 2825 Print value of expression EXP.\n\ 2826 Variables accessible are those of the lexical environment of the selected\n\ 2827 stack frame, plus all those whose scope is global or an entire file.\n\ 2828 \n\ 2829 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\ 2830 $$NUM refers to NUM'th value back from the last one.\n\ 2831 Names starting with $ refer to registers (with the values they would have\n\ 2832 if the program were to return to the stack frame now selected, restoring\n\ 2833 all registers saved by frames farther in) or else to debugger\n\ 2834 \"convenience\" variables (any such name not a known register).\n\ 2835 Use assignment expressions to give values to convenience variables.\n\ 2836 \n\ 2837 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\ 2838 @ is a binary operator for treating consecutive data objects\n\ 2839 anywhere in memory as an array. FOO@NUM gives an array whose first\n\ 2840 element is FOO, whose second element is stored in the space following\n\ 2841 where FOO is stored, etc. FOO must be an expression whose value\n\ 2842 resides in memory.\n\ 2843 \n\ 2844 EXP may be preceded with /FMT, where FMT is a format letter\n\ 2845 but no count or size letter (see \"x\" command).")); 2846 set_cmd_completer (c, expression_completer); 2847 add_com_alias ("p", "print", class_vars, 1); 2848 2849 c = add_com ("inspect", class_vars, inspect_command, _("\ 2850 Same as \"print\" command, except that if you are running in the epoch\n\ 2851 environment, the value is printed in its own window.")); 2852 set_cmd_completer (c, expression_completer); 2853 2854 add_setshow_uinteger_cmd ("max-symbolic-offset", no_class, 2855 &max_symbolic_offset, _("\ 2856 Set the largest offset that will be printed in <symbol+1234> form."), _("\ 2857 Show the largest offset that will be printed in <symbol+1234> form."), NULL, 2858 NULL, 2859 show_max_symbolic_offset, 2860 &setprintlist, &showprintlist); 2861 add_setshow_boolean_cmd ("symbol-filename", no_class, 2862 &print_symbol_filename, _("\ 2863 Set printing of source filename and line number with <symbol>."), _("\ 2864 Show printing of source filename and line number with <symbol>."), NULL, 2865 NULL, 2866 show_print_symbol_filename, 2867 &setprintlist, &showprintlist); 2868 2869 add_com ("eval", no_class, eval_command, _("\ 2870 Convert \"printf format string\", arg1, arg2, arg3, ..., argn to\n\ 2871 a command line, and call it.")); 2872 } 2873