1 /* Print values for GNU debugger GDB.
3 Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
4 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
5 Free Software Foundation, Inc.
7 This file is part of GDB.
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 2 of the License, or
12 (at your option) any later version.
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.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
25 #include "gdb_string.h"
31 #include "expression.h"
35 #include "breakpoint.h"
39 #include "symfile.h" /* for overlay functions */
40 #include "objfiles.h" /* ditto */
41 #include "completer.h" /* for completion functions */
43 #include "gdb_assert.h"
48 #include "tui/tui.h" /* For tui_active et.al. */
51 extern int asm_demangle; /* Whether to demangle syms in asm printouts */
52 extern int addressprint; /* Whether to print hex addresses in HLL " */
61 /* Last specified output format. */
63 static char last_format = 'x';
65 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
67 static char last_size = 'w';
69 /* Default address to examine next. */
71 static CORE_ADDR next_address;
73 /* Last address examined. */
75 static CORE_ADDR last_examine_address;
77 /* Contents of last address examined.
78 This is not valid past the end of the `x' command! */
80 static struct value *last_examine_value;
82 /* Largest offset between a symbolic value and an address, that will be
83 printed as `0x1234 <symbol+offset>'. */
85 static unsigned int max_symbolic_offset = UINT_MAX;
87 /* Append the source filename and linenumber of the symbol when
88 printing a symbolic value as `<symbol at filename:linenum>' if set. */
89 static int print_symbol_filename = 0;
91 /* Number of auto-display expression currently being displayed.
92 So that we can disable it if we get an error or a signal within it.
93 -1 when not doing one. */
95 int current_display_number;
97 /* Flag to low-level print routines that this value is being printed
98 in an epoch window. We'd like to pass this as a parameter, but
99 every routine would need to take it. Perhaps we can encapsulate
100 this in the I/O stream once we have GNU stdio. */
106 /* Chain link to next auto-display item. */
107 struct display *next;
108 /* Expression to be evaluated and displayed. */
109 struct expression *exp;
110 /* Item number of this auto-display item. */
112 /* Display format specified. */
113 struct format_data format;
114 /* Innermost block required by this expression when evaluated */
116 /* Status of this display (enabled or disabled) */
120 /* Chain of expressions whose values should be displayed
121 automatically each time the program stops. */
123 static struct display *display_chain;
125 static int display_number;
127 /* Prototypes for exported functions. */
129 void output_command (char *, int);
131 void _initialize_printcmd (void);
133 /* Prototypes for local functions. */
135 static void delete_display (int);
137 static void enable_display (char *, int);
139 static void disable_display_command (char *, int);
141 static void printf_command (char *, int);
143 static void display_info (char *, int);
145 static void do_one_display (struct display *);
147 static void undisplay_command (char *, int);
149 static void free_display (struct display *);
151 static void display_command (char *, int);
153 void x_command (char *, int);
155 static void address_info (char *, int);
157 static void set_command (char *, int);
159 static void call_command (char *, int);
161 static void inspect_command (char *, int);
163 static void print_command (char *, int);
165 static void print_command_1 (char *, int, int);
167 static void validate_format (struct format_data, char *);
169 static void print_formatted (struct value *, int, int, struct ui_file *);
171 static struct format_data decode_format (char **, int, int);
173 static void sym_info (char *, int);
176 /* Decode a format specification. *STRING_PTR should point to it.
177 OFORMAT and OSIZE are used as defaults for the format and size
178 if none are given in the format specification.
179 If OSIZE is zero, then the size field of the returned value
180 should be set only if a size is explicitly specified by the
182 The structure returned describes all the data
183 found in the specification. In addition, *STRING_PTR is advanced
184 past the specification and past all whitespace following it. */
186 static struct format_data
187 decode_format (char **string_ptr, int oformat, int osize)
189 struct format_data val;
190 char *p = *string_ptr;
196 if (*p >= '0' && *p <= '9')
197 val.count = atoi (p);
198 while (*p >= '0' && *p <= '9')
201 /* Now process size or format letters that follow. */
205 if (*p == 'b' || *p == 'h' || *p == 'w' || *p == 'g')
207 else if (*p >= 'a' && *p <= 'z')
213 while (*p == ' ' || *p == '\t')
217 /* Set defaults for format and size if not specified. */
218 if (val.format == '?')
222 /* Neither has been specified. */
223 val.format = oformat;
227 /* If a size is specified, any format makes a reasonable
228 default except 'i'. */
229 val.format = oformat == 'i' ? 'x' : oformat;
231 else if (val.size == '?')
236 /* Pick the appropriate size for an address. */
237 if (TARGET_PTR_BIT == 64)
238 val.size = osize ? 'g' : osize;
239 else if (TARGET_PTR_BIT == 32)
240 val.size = osize ? 'w' : osize;
241 else if (TARGET_PTR_BIT == 16)
242 val.size = osize ? 'h' : osize;
244 /* Bad value for TARGET_PTR_BIT */
245 internal_error (__FILE__, __LINE__, "failed internal consistency check");
248 /* Floating point has to be word or giantword. */
249 if (osize == 'w' || osize == 'g')
252 /* Default it to giantword if the last used size is not
254 val.size = osize ? 'g' : osize;
257 /* Characters default to one byte. */
258 val.size = osize ? 'b' : osize;
261 /* The default is the size most recently specified. */
268 /* Print value VAL on stream according to FORMAT, a letter or 0.
269 Do not end with a newline.
270 0 means print VAL according to its own type.
271 SIZE is the letter for the size of datum being printed.
272 This is used to pad hex numbers so they line up. */
275 print_formatted (struct value *val, int format, int size,
276 struct ui_file *stream)
278 struct type *type = check_typedef (value_type (val));
279 int len = TYPE_LENGTH (type);
281 if (VALUE_LVAL (val) == lval_memory)
283 next_address = VALUE_ADDRESS (val) + len;
289 /* FIXME: Need to handle wchar_t's here... */
290 next_address = VALUE_ADDRESS (val)
291 + val_print_string (VALUE_ADDRESS (val), -1, 1, stream);
295 /* The old comment says
296 "Force output out, print_insn not using _filtered".
297 I'm not completely sure what that means, I suspect most print_insn
298 now do use _filtered, so I guess it's obsolete.
299 --Yes, it does filter now, and so this is obsolete. -JB */
301 /* We often wrap here if there are long symbolic names. */
303 next_address = VALUE_ADDRESS (val)
304 + gdb_print_insn (VALUE_ADDRESS (val), stream);
309 || TYPE_CODE (type) == TYPE_CODE_ARRAY
310 || TYPE_CODE (type) == TYPE_CODE_STRING
311 || TYPE_CODE (type) == TYPE_CODE_STRUCT
312 || TYPE_CODE (type) == TYPE_CODE_UNION
313 || TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
314 /* If format is 0, use the 'natural' format for
315 * that type of value. If the type is non-scalar,
316 * we have to use language rules to print it as
317 * a series of scalars.
319 value_print (val, stream, format, Val_pretty_default);
321 /* User specified format, so don't look to the
322 * the type to tell us what to do.
324 print_scalar_formatted (value_contents (val), type,
325 format, size, stream);
329 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
330 according to letters FORMAT and SIZE on STREAM.
331 FORMAT may not be zero. Formats s and i are not supported at this level.
333 This is how the elements of an array or structure are printed
337 print_scalar_formatted (const void *valaddr, struct type *type,
338 int format, int size, struct ui_file *stream)
340 LONGEST val_long = 0;
341 unsigned int len = TYPE_LENGTH (type);
343 if (len > sizeof(LONGEST) &&
344 (TYPE_CODE (type) == TYPE_CODE_INT
345 || TYPE_CODE (type) == TYPE_CODE_ENUM))
350 print_octal_chars (stream, valaddr, len);
354 print_decimal_chars (stream, valaddr, len);
357 print_binary_chars (stream, valaddr, len);
360 print_hex_chars (stream, valaddr, len);
363 print_char_chars (stream, valaddr, len);
371 val_long = unpack_long (type, valaddr);
373 /* If the value is a pointer, and pointers and addresses are not the
374 same, then at this point, the value's length (in target bytes) is
375 TARGET_ADDR_BIT/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
376 if (TYPE_CODE (type) == TYPE_CODE_PTR)
377 len = TARGET_ADDR_BIT / TARGET_CHAR_BIT;
379 /* If we are printing it as unsigned, truncate it in case it is actually
380 a negative signed value (e.g. "print/u (short)-1" should print 65535
381 (if shorts are 16 bits) instead of 4294967295). */
384 if (len < sizeof (LONGEST))
385 val_long &= ((LONGEST) 1 << HOST_CHAR_BIT * len) - 1;
393 /* no size specified, like in print. Print varying # of digits. */
394 print_longest (stream, 'x', 1, val_long);
403 print_longest (stream, size, 1, val_long);
406 error ("Undefined output size \"%c\".", size);
411 print_longest (stream, 'd', 1, val_long);
415 print_longest (stream, 'u', 0, val_long);
420 print_longest (stream, 'o', 1, val_long);
422 fprintf_filtered (stream, "0");
427 CORE_ADDR addr = unpack_pointer (type, valaddr);
428 print_address (addr, stream);
433 value_print (value_from_longest (builtin_type_true_char, val_long),
434 stream, 0, Val_pretty_default);
438 if (len == TYPE_LENGTH (builtin_type_float))
439 type = builtin_type_float;
440 else if (len == TYPE_LENGTH (builtin_type_double))
441 type = builtin_type_double;
442 else if (len == TYPE_LENGTH (builtin_type_long_double))
443 type = builtin_type_long_double;
444 print_floating (valaddr, type, stream);
448 internal_error (__FILE__, __LINE__, "failed internal consistency check");
451 /* Binary; 't' stands for "two". */
453 char bits[8 * (sizeof val_long) + 1];
454 char buf[8 * (sizeof val_long) + 32];
459 width = 8 * (sizeof val_long);
476 error ("Undefined output size \"%c\".", size);
482 bits[width] = (val_long & 1) ? '1' : '0';
487 while (*cp && *cp == '0')
493 fputs_filtered (buf, stream);
498 error ("Undefined output format \"%c\".", format);
502 /* Specify default address for `x' command.
503 `info lines' uses this. */
506 set_next_address (CORE_ADDR addr)
510 /* Make address available to the user as $_. */
511 set_internalvar (lookup_internalvar ("_"),
512 value_from_pointer (lookup_pointer_type (builtin_type_void),
516 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
517 after LEADIN. Print nothing if no symbolic name is found nearby.
518 Optionally also print source file and line number, if available.
519 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
520 or to interpret it as a possible C++ name and convert it back to source
521 form. However note that DO_DEMANGLE can be overridden by the specific
522 settings of the demangle and asm_demangle variables. */
525 print_address_symbolic (CORE_ADDR addr, struct ui_file *stream, int do_demangle,
529 char *filename = NULL;
534 /* throw away both name and filename */
535 struct cleanup *cleanup_chain = make_cleanup (free_current_contents, &name);
536 make_cleanup (free_current_contents, &filename);
538 if (build_address_symbolic (addr, do_demangle, &name, &offset, &filename, &line, &unmapped))
540 do_cleanups (cleanup_chain);
544 fputs_filtered (leadin, stream);
546 fputs_filtered ("<*", stream);
548 fputs_filtered ("<", stream);
549 fputs_filtered (name, stream);
551 fprintf_filtered (stream, "+%u", (unsigned int) offset);
553 /* Append source filename and line number if desired. Give specific
554 line # of this addr, if we have it; else line # of the nearest symbol. */
555 if (print_symbol_filename && filename != NULL)
558 fprintf_filtered (stream, " at %s:%d", filename, line);
560 fprintf_filtered (stream, " in %s", filename);
563 fputs_filtered ("*>", stream);
565 fputs_filtered (">", stream);
567 do_cleanups (cleanup_chain);
570 /* Given an address ADDR return all the elements needed to print the
571 address in a symbolic form. NAME can be mangled or not depending
572 on DO_DEMANGLE (and also on the asm_demangle global variable,
573 manipulated via ''set print asm-demangle''). Return 0 in case of
574 success, when all the info in the OUT paramters is valid. Return 1
577 build_address_symbolic (CORE_ADDR addr, /* IN */
578 int do_demangle, /* IN */
579 char **name, /* OUT */
580 int *offset, /* OUT */
581 char **filename, /* OUT */
583 int *unmapped) /* OUT */
585 struct minimal_symbol *msymbol;
586 struct symbol *symbol;
587 struct symtab *symtab = 0;
588 CORE_ADDR name_location = 0;
589 asection *section = 0;
590 char *name_temp = "";
592 /* Let's say it is unmapped. */
595 /* Determine if the address is in an overlay, and whether it is
597 if (overlay_debugging)
599 section = find_pc_overlay (addr);
600 if (pc_in_unmapped_range (addr, section))
603 addr = overlay_mapped_address (addr, section);
607 /* First try to find the address in the symbol table, then
608 in the minsyms. Take the closest one. */
610 /* This is defective in the sense that it only finds text symbols. So
611 really this is kind of pointless--we should make sure that the
612 minimal symbols have everything we need (by changing that we could
613 save some memory, but for many debug format--ELF/DWARF or
614 anything/stabs--it would be inconvenient to eliminate those minimal
616 msymbol = lookup_minimal_symbol_by_pc_section (addr, section);
617 symbol = find_pc_sect_function (addr, section);
621 name_location = BLOCK_START (SYMBOL_BLOCK_VALUE (symbol));
622 if (do_demangle || asm_demangle)
623 name_temp = SYMBOL_PRINT_NAME (symbol);
625 name_temp = DEPRECATED_SYMBOL_NAME (symbol);
630 if (SYMBOL_VALUE_ADDRESS (msymbol) > name_location || symbol == NULL)
632 /* The msymbol is closer to the address than the symbol;
633 use the msymbol instead. */
636 name_location = SYMBOL_VALUE_ADDRESS (msymbol);
637 if (do_demangle || asm_demangle)
638 name_temp = SYMBOL_PRINT_NAME (msymbol);
640 name_temp = DEPRECATED_SYMBOL_NAME (msymbol);
643 if (symbol == NULL && msymbol == NULL)
646 /* If the nearest symbol is too far away, don't print anything symbolic. */
648 /* For when CORE_ADDR is larger than unsigned int, we do math in
649 CORE_ADDR. But when we detect unsigned wraparound in the
650 CORE_ADDR math, we ignore this test and print the offset,
651 because addr+max_symbolic_offset has wrapped through the end
652 of the address space back to the beginning, giving bogus comparison. */
653 if (addr > name_location + max_symbolic_offset
654 && name_location + max_symbolic_offset > name_location)
657 *offset = addr - name_location;
659 *name = xstrdup (name_temp);
661 if (print_symbol_filename)
663 struct symtab_and_line sal;
665 sal = find_pc_sect_line (addr, section, 0);
669 *filename = xstrdup (sal.symtab->filename);
672 else if (symtab && symbol && symbol->line)
674 *filename = xstrdup (symtab->filename);
675 *line = symbol->line;
679 *filename = xstrdup (symtab->filename);
686 /* Print address ADDR on STREAM. USE_LOCAL means the same thing as for
689 print_address_numeric (CORE_ADDR addr, int use_local, struct ui_file *stream)
691 /* Truncate address to the size of a target address, avoiding shifts
692 larger or equal than the width of a CORE_ADDR. The local
693 variable ADDR_BIT stops the compiler reporting a shift overflow
694 when it won't occur. */
695 /* NOTE: This assumes that the significant address information is
696 kept in the least significant bits of ADDR - the upper bits were
697 either zero or sign extended. Should ADDRESS_TO_POINTER() or
698 some ADDRESS_TO_PRINTABLE() be used to do the conversion? */
700 int addr_bit = TARGET_ADDR_BIT;
702 if (addr_bit < (sizeof (CORE_ADDR) * HOST_CHAR_BIT))
703 addr &= ((CORE_ADDR) 1 << addr_bit) - 1;
704 print_longest (stream, 'x', use_local, (ULONGEST) addr);
707 /* Print address ADDR symbolically on STREAM.
708 First print it as a number. Then perhaps print
709 <SYMBOL + OFFSET> after the number. */
712 print_address (CORE_ADDR addr, struct ui_file *stream)
714 print_address_numeric (addr, 1, stream);
715 print_address_symbolic (addr, stream, asm_demangle, " ");
718 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
719 controls whether to print the symbolic name "raw" or demangled.
720 Global setting "addressprint" controls whether to print hex address
724 print_address_demangle (CORE_ADDR addr, struct ui_file *stream, int do_demangle)
728 fprintf_filtered (stream, "0");
730 else if (addressprint)
732 print_address_numeric (addr, 1, stream);
733 print_address_symbolic (addr, stream, do_demangle, " ");
737 print_address_symbolic (addr, stream, do_demangle, "");
742 /* These are the types that $__ will get after an examine command of one
745 static struct type *examine_i_type;
747 static struct type *examine_b_type;
748 static struct type *examine_h_type;
749 static struct type *examine_w_type;
750 static struct type *examine_g_type;
752 /* Examine data at address ADDR in format FMT.
753 Fetch it from memory and print on gdb_stdout. */
756 do_examine (struct format_data fmt, CORE_ADDR addr)
761 struct type *val_type = NULL;
770 /* String or instruction format implies fetch single bytes
771 regardless of the specified size. */
772 if (format == 's' || format == 'i')
776 val_type = examine_i_type;
777 else if (size == 'b')
778 val_type = examine_b_type;
779 else if (size == 'h')
780 val_type = examine_h_type;
781 else if (size == 'w')
782 val_type = examine_w_type;
783 else if (size == 'g')
784 val_type = examine_g_type;
791 if (format == 's' || format == 'i')
794 /* Print as many objects as specified in COUNT, at most maxelts per line,
795 with the address of the next one at the start of each line. */
800 print_address (next_address, gdb_stdout);
801 printf_filtered (":");
806 printf_filtered ("\t");
807 /* Note that print_formatted sets next_address for the next
809 last_examine_address = next_address;
811 if (last_examine_value)
812 value_free (last_examine_value);
814 /* The value to be displayed is not fetched greedily.
815 Instead, to avoid the posibility of a fetched value not
816 being used, its retreval is delayed until the print code
817 uses it. When examining an instruction stream, the
818 disassembler will perform its own memory fetch using just
819 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
820 the disassembler be modified so that LAST_EXAMINE_VALUE
821 is left with the byte sequence from the last complete
822 instruction fetched from memory? */
823 last_examine_value = value_at_lazy (val_type, next_address);
825 if (last_examine_value)
826 release_value (last_examine_value);
828 print_formatted (last_examine_value, format, size, gdb_stdout);
830 printf_filtered ("\n");
831 gdb_flush (gdb_stdout);
836 validate_format (struct format_data fmt, char *cmdname)
839 error ("Size letters are meaningless in \"%s\" command.", cmdname);
841 error ("Item count other than 1 is meaningless in \"%s\" command.",
843 if (fmt.format == 'i' || fmt.format == 's')
844 error ("Format letter \"%c\" is meaningless in \"%s\" command.",
845 fmt.format, cmdname);
848 /* Evaluate string EXP as an expression in the current language and
849 print the resulting value. EXP may contain a format specifier as the
850 first argument ("/x myvar" for example, to print myvar in hex).
854 print_command_1 (char *exp, int inspect, int voidprint)
856 struct expression *expr;
857 struct cleanup *old_chain = 0;
860 struct format_data fmt;
863 /* Pass inspect flag to the rest of the print routines in a global (sigh). */
864 inspect_it = inspect;
866 if (exp && *exp == '/')
869 fmt = decode_format (&exp, last_format, 0);
870 validate_format (fmt, "print");
871 last_format = format = fmt.format;
883 expr = parse_expression (exp);
884 old_chain = make_cleanup (free_current_contents, &expr);
886 val = evaluate_expression (expr);
889 val = access_value_history (0);
891 if (voidprint || (val && value_type (val) &&
892 TYPE_CODE (value_type (val)) != TYPE_CODE_VOID))
894 int histindex = record_latest_value (val);
897 annotate_value_history_begin (histindex, value_type (val));
899 annotate_value_begin (value_type (val));
902 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"", exp, histindex);
903 else if (histindex >= 0)
904 printf_filtered ("$%d = ", histindex);
907 annotate_value_history_value ();
909 print_formatted (val, format, fmt.size, gdb_stdout);
910 printf_filtered ("\n");
913 annotate_value_history_end ();
915 annotate_value_end ();
918 printf_unfiltered ("\") )\030");
922 do_cleanups (old_chain);
923 inspect_it = 0; /* Reset print routines to normal */
927 print_command (char *exp, int from_tty)
929 print_command_1 (exp, 0, 1);
932 /* Same as print, except in epoch, it gets its own window */
934 inspect_command (char *exp, int from_tty)
936 extern int epoch_interface;
938 print_command_1 (exp, epoch_interface, 1);
941 /* Same as print, except it doesn't print void results. */
943 call_command (char *exp, int from_tty)
945 print_command_1 (exp, 0, 0);
949 output_command (char *exp, int from_tty)
951 struct expression *expr;
952 struct cleanup *old_chain;
955 struct format_data fmt;
957 if (exp && *exp == '/')
960 fmt = decode_format (&exp, 0, 0);
961 validate_format (fmt, "output");
965 expr = parse_expression (exp);
966 old_chain = make_cleanup (free_current_contents, &expr);
968 val = evaluate_expression (expr);
970 annotate_value_begin (value_type (val));
972 print_formatted (val, format, fmt.size, gdb_stdout);
974 annotate_value_end ();
977 gdb_flush (gdb_stdout);
979 do_cleanups (old_chain);
983 set_command (char *exp, int from_tty)
985 struct expression *expr = parse_expression (exp);
986 struct cleanup *old_chain =
987 make_cleanup (free_current_contents, &expr);
988 evaluate_expression (expr);
989 do_cleanups (old_chain);
993 sym_info (char *arg, int from_tty)
995 struct minimal_symbol *msymbol;
996 struct objfile *objfile;
997 struct obj_section *osect;
999 CORE_ADDR addr, sect_addr;
1001 unsigned int offset;
1004 error_no_arg ("address");
1006 addr = parse_and_eval_address (arg);
1007 ALL_OBJSECTIONS (objfile, osect)
1009 sect = osect->the_bfd_section;
1010 sect_addr = overlay_mapped_address (addr, sect);
1012 if (osect->addr <= sect_addr && sect_addr < osect->endaddr &&
1013 (msymbol = lookup_minimal_symbol_by_pc_section (sect_addr, sect)))
1016 offset = sect_addr - SYMBOL_VALUE_ADDRESS (msymbol);
1018 printf_filtered ("%s + %u in ",
1019 SYMBOL_PRINT_NAME (msymbol), offset);
1021 printf_filtered ("%s in ",
1022 SYMBOL_PRINT_NAME (msymbol));
1023 if (pc_in_unmapped_range (addr, sect))
1024 printf_filtered ("load address range of ");
1025 if (section_is_overlay (sect))
1026 printf_filtered ("%s overlay ",
1027 section_is_mapped (sect) ? "mapped" : "unmapped");
1028 printf_filtered ("section %s", sect->name);
1029 printf_filtered ("\n");
1033 printf_filtered ("No symbol matches %s.\n", arg);
1037 address_info (char *exp, int from_tty)
1040 struct minimal_symbol *msymbol;
1044 CORE_ADDR load_addr;
1045 int is_a_field_of_this; /* C++: lookup_symbol sets this to nonzero
1046 if exp is a field of `this'. */
1049 error ("Argument required.");
1051 sym = lookup_symbol (exp, get_selected_block (0), VAR_DOMAIN,
1052 &is_a_field_of_this, (struct symtab **) NULL);
1055 if (is_a_field_of_this)
1057 printf_filtered ("Symbol \"");
1058 fprintf_symbol_filtered (gdb_stdout, exp,
1059 current_language->la_language, DMGL_ANSI);
1060 printf_filtered ("\" is a field of the local class variable ");
1061 if (current_language->la_language == language_objc)
1062 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1064 printf_filtered ("`this'\n");
1068 msymbol = lookup_minimal_symbol (exp, NULL, NULL);
1070 if (msymbol != NULL)
1072 load_addr = SYMBOL_VALUE_ADDRESS (msymbol);
1074 printf_filtered ("Symbol \"");
1075 fprintf_symbol_filtered (gdb_stdout, exp,
1076 current_language->la_language, DMGL_ANSI);
1077 printf_filtered ("\" is at ");
1078 print_address_numeric (load_addr, 1, gdb_stdout);
1079 printf_filtered (" in a file compiled without debugging");
1080 section = SYMBOL_BFD_SECTION (msymbol);
1081 if (section_is_overlay (section))
1083 load_addr = overlay_unmapped_address (load_addr, section);
1084 printf_filtered (",\n -- loaded at ");
1085 print_address_numeric (load_addr, 1, gdb_stdout);
1086 printf_filtered (" in overlay section %s", section->name);
1088 printf_filtered (".\n");
1091 error ("No symbol \"%s\" in current context.", exp);
1095 printf_filtered ("Symbol \"");
1096 fprintf_symbol_filtered (gdb_stdout, DEPRECATED_SYMBOL_NAME (sym),
1097 current_language->la_language, DMGL_ANSI);
1098 printf_filtered ("\" is ");
1099 val = SYMBOL_VALUE (sym);
1100 basereg = SYMBOL_BASEREG (sym);
1101 section = SYMBOL_BFD_SECTION (sym);
1103 switch (SYMBOL_CLASS (sym))
1106 case LOC_CONST_BYTES:
1107 printf_filtered ("constant");
1111 printf_filtered ("a label at address ");
1112 print_address_numeric (load_addr = SYMBOL_VALUE_ADDRESS (sym),
1114 if (section_is_overlay (section))
1116 load_addr = overlay_unmapped_address (load_addr, section);
1117 printf_filtered (",\n -- loaded at ");
1118 print_address_numeric (load_addr, 1, gdb_stdout);
1119 printf_filtered (" in overlay section %s", section->name);
1124 case LOC_COMPUTED_ARG:
1125 /* FIXME: cagney/2004-01-26: It should be possible to
1126 unconditionally call the SYMBOL_OPS method when available.
1127 Unfortunately DWARF 2 stores the frame-base (instead of the
1128 function) location in a function's symbol. Oops! For the
1129 moment enable this when/where applicable. */
1130 SYMBOL_OPS (sym)->describe_location (sym, gdb_stdout);
1134 printf_filtered ("a variable in register %s", REGISTER_NAME (val));
1138 printf_filtered ("static storage at address ");
1139 print_address_numeric (load_addr = SYMBOL_VALUE_ADDRESS (sym),
1141 if (section_is_overlay (section))
1143 load_addr = overlay_unmapped_address (load_addr, section);
1144 printf_filtered (",\n -- loaded at ");
1145 print_address_numeric (load_addr, 1, gdb_stdout);
1146 printf_filtered (" in overlay section %s", section->name);
1151 printf_filtered ("external global (indirect addressing), at address *(");
1152 print_address_numeric (load_addr = SYMBOL_VALUE_ADDRESS (sym),
1154 printf_filtered (")");
1155 if (section_is_overlay (section))
1157 load_addr = overlay_unmapped_address (load_addr, section);
1158 printf_filtered (",\n -- loaded at ");
1159 print_address_numeric (load_addr, 1, gdb_stdout);
1160 printf_filtered (" in overlay section %s", section->name);
1165 printf_filtered ("an argument in register %s", REGISTER_NAME (val));
1168 case LOC_REGPARM_ADDR:
1169 printf_filtered ("address of an argument in register %s", REGISTER_NAME (val));
1173 printf_filtered ("an argument at offset %ld", val);
1177 printf_filtered ("an argument at frame offset %ld", val);
1181 printf_filtered ("a local variable at frame offset %ld", val);
1185 printf_filtered ("a reference argument at offset %ld", val);
1189 printf_filtered ("a variable at offset %ld from register %s",
1190 val, REGISTER_NAME (basereg));
1193 case LOC_BASEREG_ARG:
1194 printf_filtered ("an argument at offset %ld from register %s",
1195 val, REGISTER_NAME (basereg));
1199 printf_filtered ("a typedef");
1203 printf_filtered ("a function at address ");
1204 print_address_numeric (load_addr = BLOCK_START (SYMBOL_BLOCK_VALUE (sym)),
1206 if (section_is_overlay (section))
1208 load_addr = overlay_unmapped_address (load_addr, section);
1209 printf_filtered (",\n -- loaded at ");
1210 print_address_numeric (load_addr, 1, gdb_stdout);
1211 printf_filtered (" in overlay section %s", section->name);
1215 case LOC_UNRESOLVED:
1217 struct minimal_symbol *msym;
1219 msym = lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (sym), NULL, NULL);
1221 printf_filtered ("unresolved");
1224 section = SYMBOL_BFD_SECTION (msym);
1225 printf_filtered ("static storage at address ");
1226 print_address_numeric (load_addr = SYMBOL_VALUE_ADDRESS (msym),
1228 if (section_is_overlay (section))
1230 load_addr = overlay_unmapped_address (load_addr, section);
1231 printf_filtered (",\n -- loaded at ");
1232 print_address_numeric (load_addr, 1, gdb_stdout);
1233 printf_filtered (" in overlay section %s", section->name);
1239 case LOC_HP_THREAD_LOCAL_STATIC:
1241 "a thread-local variable at offset %ld from the thread base register %s",
1242 val, REGISTER_NAME (basereg));
1245 case LOC_OPTIMIZED_OUT:
1246 printf_filtered ("optimized out");
1250 printf_filtered ("of unknown (botched) type");
1253 printf_filtered (".\n");
1257 x_command (char *exp, int from_tty)
1259 struct expression *expr;
1260 struct format_data fmt;
1261 struct cleanup *old_chain;
1264 fmt.format = last_format;
1265 fmt.size = last_size;
1268 if (exp && *exp == '/')
1271 fmt = decode_format (&exp, last_format, last_size);
1274 /* If we have an expression, evaluate it and use it as the address. */
1276 if (exp != 0 && *exp != 0)
1278 expr = parse_expression (exp);
1279 /* Cause expression not to be there any more
1280 if this command is repeated with Newline.
1281 But don't clobber a user-defined command's definition. */
1284 old_chain = make_cleanup (free_current_contents, &expr);
1285 val = evaluate_expression (expr);
1286 if (TYPE_CODE (value_type (val)) == TYPE_CODE_REF)
1287 val = value_ind (val);
1288 /* In rvalue contexts, such as this, functions are coerced into
1289 pointers to functions. This makes "x/i main" work. */
1290 if (/* last_format == 'i' && */
1291 TYPE_CODE (value_type (val)) == TYPE_CODE_FUNC
1292 && VALUE_LVAL (val) == lval_memory)
1293 next_address = VALUE_ADDRESS (val);
1295 next_address = value_as_address (val);
1296 do_cleanups (old_chain);
1299 do_examine (fmt, next_address);
1301 /* If the examine succeeds, we remember its size and format for next time. */
1302 last_size = fmt.size;
1303 last_format = fmt.format;
1305 /* Set a couple of internal variables if appropriate. */
1306 if (last_examine_value)
1308 /* Make last address examined available to the user as $_. Use
1309 the correct pointer type. */
1310 struct type *pointer_type
1311 = lookup_pointer_type (value_type (last_examine_value));
1312 set_internalvar (lookup_internalvar ("_"),
1313 value_from_pointer (pointer_type,
1314 last_examine_address));
1316 /* Make contents of last address examined available to the user as $__. */
1317 /* If the last value has not been fetched from memory then don't
1318 fetch it now - instead mark it by voiding the $__ variable. */
1319 if (value_lazy (last_examine_value))
1320 set_internalvar (lookup_internalvar ("__"),
1321 allocate_value (builtin_type_void));
1323 set_internalvar (lookup_internalvar ("__"), last_examine_value);
1328 /* Add an expression to the auto-display chain.
1329 Specify the expression. */
1332 display_command (char *exp, int from_tty)
1334 struct format_data fmt;
1335 struct expression *expr;
1336 struct display *new;
1340 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1342 if (tui_active && exp != NULL && *exp == '$')
1343 display_it = (tui_set_layout_for_display_command (exp) == TUI_FAILURE);
1357 fmt = decode_format (&exp, 0, 0);
1358 if (fmt.size && fmt.format == 0)
1360 if (fmt.format == 'i' || fmt.format == 's')
1370 innermost_block = 0;
1371 expr = parse_expression (exp);
1373 new = (struct display *) xmalloc (sizeof (struct display));
1376 new->block = innermost_block;
1377 new->next = display_chain;
1378 new->number = ++display_number;
1381 display_chain = new;
1383 if (from_tty && target_has_execution)
1384 do_one_display (new);
1391 free_display (struct display *d)
1397 /* Clear out the display_chain.
1398 Done when new symtabs are loaded, since this invalidates
1399 the types stored in many expressions. */
1402 clear_displays (void)
1406 while ((d = display_chain) != NULL)
1409 display_chain = d->next;
1414 /* Delete the auto-display number NUM. */
1417 delete_display (int num)
1419 struct display *d1, *d;
1422 error ("No display number %d.", num);
1424 if (display_chain->number == num)
1427 display_chain = d1->next;
1431 for (d = display_chain;; d = d->next)
1434 error ("No display number %d.", num);
1435 if (d->next->number == num)
1445 /* Delete some values from the auto-display chain.
1446 Specify the element numbers. */
1449 undisplay_command (char *args, int from_tty)
1457 if (query ("Delete all auto-display expressions? "))
1466 while (*p1 >= '0' && *p1 <= '9')
1468 if (*p1 && *p1 != ' ' && *p1 != '\t')
1469 error ("Arguments must be display numbers.");
1473 delete_display (num);
1476 while (*p == ' ' || *p == '\t')
1482 /* Display a single auto-display.
1483 Do nothing if the display cannot be printed in the current context,
1484 or if the display is disabled. */
1487 do_one_display (struct display *d)
1489 int within_current_scope;
1491 if (d->enabled_p == 0)
1495 within_current_scope = contained_in (get_selected_block (0), d->block);
1497 within_current_scope = 1;
1498 if (!within_current_scope)
1501 current_display_number = d->number;
1503 annotate_display_begin ();
1504 printf_filtered ("%d", d->number);
1505 annotate_display_number_end ();
1506 printf_filtered (": ");
1512 annotate_display_format ();
1514 printf_filtered ("x/");
1515 if (d->format.count != 1)
1516 printf_filtered ("%d", d->format.count);
1517 printf_filtered ("%c", d->format.format);
1518 if (d->format.format != 'i' && d->format.format != 's')
1519 printf_filtered ("%c", d->format.size);
1520 printf_filtered (" ");
1522 annotate_display_expression ();
1524 print_expression (d->exp, gdb_stdout);
1525 annotate_display_expression_end ();
1527 if (d->format.count != 1)
1528 printf_filtered ("\n");
1530 printf_filtered (" ");
1532 val = evaluate_expression (d->exp);
1533 addr = value_as_address (val);
1534 if (d->format.format == 'i')
1535 addr = ADDR_BITS_REMOVE (addr);
1537 annotate_display_value ();
1539 do_examine (d->format, addr);
1543 annotate_display_format ();
1545 if (d->format.format)
1546 printf_filtered ("/%c ", d->format.format);
1548 annotate_display_expression ();
1550 print_expression (d->exp, gdb_stdout);
1551 annotate_display_expression_end ();
1553 printf_filtered (" = ");
1555 annotate_display_expression ();
1557 print_formatted (evaluate_expression (d->exp),
1558 d->format.format, d->format.size, gdb_stdout);
1559 printf_filtered ("\n");
1562 annotate_display_end ();
1564 gdb_flush (gdb_stdout);
1565 current_display_number = -1;
1568 /* Display all of the values on the auto-display chain which can be
1569 evaluated in the current scope. */
1576 for (d = display_chain; d; d = d->next)
1580 /* Delete the auto-display which we were in the process of displaying.
1581 This is done when there is an error or a signal. */
1584 disable_display (int num)
1588 for (d = display_chain; d; d = d->next)
1589 if (d->number == num)
1594 printf_unfiltered ("No display number %d.\n", num);
1598 disable_current_display (void)
1600 if (current_display_number >= 0)
1602 disable_display (current_display_number);
1603 fprintf_unfiltered (gdb_stderr, "Disabling display %d to avoid infinite recursion.\n",
1604 current_display_number);
1606 current_display_number = -1;
1610 display_info (char *ignore, int from_tty)
1615 printf_unfiltered ("There are no auto-display expressions now.\n");
1617 printf_filtered ("Auto-display expressions now in effect:\n\
1618 Num Enb Expression\n");
1620 for (d = display_chain; d; d = d->next)
1622 printf_filtered ("%d: %c ", d->number, "ny"[(int) d->enabled_p]);
1624 printf_filtered ("/%d%c%c ", d->format.count, d->format.size,
1626 else if (d->format.format)
1627 printf_filtered ("/%c ", d->format.format);
1628 print_expression (d->exp, gdb_stdout);
1629 if (d->block && !contained_in (get_selected_block (0), d->block))
1630 printf_filtered (" (cannot be evaluated in the current context)");
1631 printf_filtered ("\n");
1632 gdb_flush (gdb_stdout);
1637 enable_display (char *args, int from_tty)
1646 for (d = display_chain; d; d = d->next)
1653 while (*p1 >= '0' && *p1 <= '9')
1655 if (*p1 && *p1 != ' ' && *p1 != '\t')
1656 error ("Arguments must be display numbers.");
1660 for (d = display_chain; d; d = d->next)
1661 if (d->number == num)
1666 printf_unfiltered ("No display number %d.\n", num);
1669 while (*p == ' ' || *p == '\t')
1675 disable_display_command (char *args, int from_tty)
1683 for (d = display_chain; d; d = d->next)
1690 while (*p1 >= '0' && *p1 <= '9')
1692 if (*p1 && *p1 != ' ' && *p1 != '\t')
1693 error ("Arguments must be display numbers.");
1695 disable_display (atoi (p));
1698 while (*p == ' ' || *p == '\t')
1704 /* Print the value in stack frame FRAME of a variable
1705 specified by a struct symbol. */
1708 print_variable_value (struct symbol *var, struct frame_info *frame,
1709 struct ui_file *stream)
1711 struct value *val = read_var_value (var, frame);
1713 value_print (val, stream, 0, Val_pretty_default);
1717 printf_command (char *arg, int from_tty)
1721 char *string = NULL;
1722 struct value **val_args;
1724 char *current_substring;
1726 int allocated_args = 20;
1727 struct cleanup *old_cleanups;
1729 val_args = (struct value **) xmalloc (allocated_args
1730 * sizeof (struct value *));
1731 old_cleanups = make_cleanup (free_current_contents, &val_args);
1734 error_no_arg ("format-control string and values to print");
1736 /* Skip white space before format string */
1737 while (*s == ' ' || *s == '\t')
1740 /* A format string should follow, enveloped in double quotes */
1742 error ("Bad format string, missing '\"'.");
1744 /* Parse the format-control string and copy it into the string STRING,
1745 processing some kinds of escape sequence. */
1747 f = string = (char *) alloca (strlen (s) + 1);
1755 error ("Bad format string, non-terminated '\"'.");
1788 /* ??? TODO: handle other escape sequences */
1789 error ("Unrecognized escape character \\%c in format string.",
1799 /* Skip over " and following space and comma. */
1802 while (*s == ' ' || *s == '\t')
1805 if (*s != ',' && *s != 0)
1806 error ("Invalid argument syntax");
1810 while (*s == ' ' || *s == '\t')
1813 /* Need extra space for the '\0's. Doubling the size is sufficient. */
1814 substrings = alloca (strlen (string) * 2);
1815 current_substring = substrings;
1818 /* Now scan the string for %-specs and see what kinds of args they want.
1819 argclass[I] classifies the %-specs so we can give printf_filtered
1820 something of the right size. */
1824 no_arg, int_arg, string_arg, double_arg, long_long_arg
1826 enum argclass *argclass;
1827 enum argclass this_argclass;
1833 argclass = (enum argclass *) alloca (strlen (s) * sizeof *argclass);
1841 while (strchr ("0123456789.hlL-+ #", *f))
1843 if (*f == 'l' || *f == 'L')
1850 this_argclass = string_arg;
1856 this_argclass = double_arg;
1860 error ("`*' not supported for precision or width in printf");
1863 error ("Format specifier `n' not supported in printf");
1866 this_argclass = no_arg;
1871 this_argclass = long_long_arg;
1873 this_argclass = int_arg;
1877 if (this_argclass != no_arg)
1879 strncpy (current_substring, last_arg, f - last_arg);
1880 current_substring += f - last_arg;
1881 *current_substring++ = '\0';
1883 argclass[nargs_wanted++] = this_argclass;
1887 /* Now, parse all arguments and evaluate them.
1888 Store the VALUEs in VAL_ARGS. */
1893 if (nargs == allocated_args)
1894 val_args = (struct value **) xrealloc ((char *) val_args,
1895 (allocated_args *= 2)
1896 * sizeof (struct value *));
1898 val_args[nargs] = parse_to_comma_and_eval (&s1);
1900 /* If format string wants a float, unchecked-convert the value to
1901 floating point of the same size */
1903 if (argclass[nargs] == double_arg)
1905 struct type *type = value_type (val_args[nargs]);
1906 if (TYPE_LENGTH (type) == sizeof (float))
1907 val_args[nargs]->type = builtin_type_float;
1908 if (TYPE_LENGTH (type) == sizeof (double))
1909 val_args[nargs]->type = builtin_type_double;
1917 if (nargs != nargs_wanted)
1918 error ("Wrong number of arguments for specified format-string");
1920 /* Now actually print them. */
1921 current_substring = substrings;
1922 for (i = 0; i < nargs; i++)
1924 switch (argclass[i])
1931 tem = value_as_address (val_args[i]);
1933 /* This is a %s argument. Find the length of the string. */
1938 read_memory (tem + j, &c, 1);
1943 /* Copy the string contents into a string inside GDB. */
1944 str = (char *) alloca (j + 1);
1946 read_memory (tem, str, j);
1949 printf_filtered (current_substring, str);
1954 double val = value_as_double (val_args[i]);
1955 printf_filtered (current_substring, val);
1959 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
1961 long long val = value_as_long (val_args[i]);
1962 printf_filtered (current_substring, val);
1966 error ("long long not supported in printf");
1970 /* FIXME: there should be separate int_arg and long_arg. */
1971 long val = value_as_long (val_args[i]);
1972 printf_filtered (current_substring, val);
1975 default: /* purecov: deadcode */
1976 error ("internal error in printf_command"); /* purecov: deadcode */
1978 /* Skip to the next substring. */
1979 current_substring += strlen (current_substring) + 1;
1981 /* Print the portion of the format string after the last argument. */
1982 puts_filtered (last_arg);
1984 do_cleanups (old_cleanups);
1988 _initialize_printcmd (void)
1990 struct cmd_list_element *c;
1992 current_display_number = -1;
1994 add_info ("address", address_info,
1995 "Describe where symbol SYM is stored.");
1997 add_info ("symbol", sym_info,
1998 "Describe what symbol is at location ADDR.\n\
1999 Only for symbols with fixed locations (global or static scope).");
2001 add_com ("x", class_vars, x_command,
2002 concat ("Examine memory: x/FMT ADDRESS.\n\
2003 ADDRESS is an expression for the memory address to examine.\n\
2004 FMT is a repeat count followed by a format letter and a size letter.\n\
2005 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2006 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n",
2007 "Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2008 The specified number of objects of the specified size are printed\n\
2009 according to the format.\n\n\
2010 Defaults for format and size letters are those previously used.\n\
2011 Default count is 1. Default address is following last thing printed\n\
2012 with this command or \"print\".", NULL));
2015 add_com ("whereis", class_vars, whereis_command,
2016 "Print line number and file of definition of variable.");
2019 add_info ("display", display_info,
2020 "Expressions to display when program stops, with code numbers.");
2022 add_cmd ("undisplay", class_vars, undisplay_command,
2023 "Cancel some expressions to be displayed when program stops.\n\
2024 Arguments are the code numbers of the expressions to stop displaying.\n\
2025 No argument means cancel all automatic-display expressions.\n\
2026 \"delete display\" has the same effect as this command.\n\
2027 Do \"info display\" to see current list of code numbers.",
2030 add_com ("display", class_vars, display_command,
2031 "Print value of expression EXP each time the program stops.\n\
2032 /FMT may be used before EXP as in the \"print\" command.\n\
2033 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2034 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2035 and examining is done as in the \"x\" command.\n\n\
2036 With no argument, display all currently requested auto-display expressions.\n\
2037 Use \"undisplay\" to cancel display requests previously made."
2040 add_cmd ("display", class_vars, enable_display,
2041 "Enable some expressions to be displayed when program stops.\n\
2042 Arguments are the code numbers of the expressions to resume displaying.\n\
2043 No argument means enable all automatic-display expressions.\n\
2044 Do \"info display\" to see current list of code numbers.", &enablelist);
2046 add_cmd ("display", class_vars, disable_display_command,
2047 "Disable some expressions to be displayed when program stops.\n\
2048 Arguments are the code numbers of the expressions to stop displaying.\n\
2049 No argument means disable all automatic-display expressions.\n\
2050 Do \"info display\" to see current list of code numbers.", &disablelist);
2052 add_cmd ("display", class_vars, undisplay_command,
2053 "Cancel some expressions to be displayed when program stops.\n\
2054 Arguments are the code numbers of the expressions to stop displaying.\n\
2055 No argument means cancel all automatic-display expressions.\n\
2056 Do \"info display\" to see current list of code numbers.", &deletelist);
2058 add_com ("printf", class_vars, printf_command,
2059 "printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2060 This is useful for formatted output in user-defined commands.");
2062 add_com ("output", class_vars, output_command,
2063 "Like \"print\" but don't put in value history and don't print newline.\n\
2064 This is useful in user-defined commands.");
2066 add_prefix_cmd ("set", class_vars, set_command,
2067 concat ("Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2068 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2069 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2070 with $), a register (a few standard names starting with $), or an actual\n\
2071 variable in the program being debugged. EXP is any valid expression.\n",
2072 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2073 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2074 You can see these environment settings with the \"show\" command.", NULL),
2075 &setlist, "set ", 1, &cmdlist);
2077 add_com ("assign", class_vars, set_command, concat ("Evaluate expression \
2078 EXP and assign result to variable VAR, using assignment\n\
2079 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2080 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2081 with $), a register (a few standard names starting with $), or an actual\n\
2082 variable in the program being debugged. EXP is any valid expression.\n",
2083 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2084 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2085 You can see these environment settings with the \"show\" command.", NULL));
2087 /* "call" is the same as "set", but handy for dbx users to call fns. */
2088 c = add_com ("call", class_vars, call_command,
2089 "Call a function in the program.\n\
2090 The argument is the function name and arguments, in the notation of the\n\
2091 current working language. The result is printed and saved in the value\n\
2092 history, if it is not void.");
2093 set_cmd_completer (c, location_completer);
2095 add_cmd ("variable", class_vars, set_command,
2096 "Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2097 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2098 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2099 with $), a register (a few standard names starting with $), or an actual\n\
2100 variable in the program being debugged. EXP is any valid expression.\n\
2101 This may usually be abbreviated to simply \"set\".",
2104 c = add_com ("print", class_vars, print_command,
2105 concat ("Print value of expression EXP.\n\
2106 Variables accessible are those of the lexical environment of the selected\n\
2107 stack frame, plus all those whose scope is global or an entire file.\n\
2109 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2110 $$NUM refers to NUM'th value back from the last one.\n\
2111 Names starting with $ refer to registers (with the values they would have\n",
2112 "if the program were to return to the stack frame now selected, restoring\n\
2113 all registers saved by frames farther in) or else to debugger\n\
2114 \"convenience\" variables (any such name not a known register).\n\
2115 Use assignment expressions to give values to convenience variables.\n",
2117 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2118 @ is a binary operator for treating consecutive data objects\n\
2119 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2120 element is FOO, whose second element is stored in the space following\n\
2121 where FOO is stored, etc. FOO must be an expression whose value\n\
2122 resides in memory.\n",
2124 EXP may be preceded with /FMT, where FMT is a format letter\n\
2125 but no count or size letter (see \"x\" command).", NULL));
2126 set_cmd_completer (c, location_completer);
2127 add_com_alias ("p", "print", class_vars, 1);
2129 c = add_com ("inspect", class_vars, inspect_command,
2130 "Same as \"print\" command, except that if you are running in the epoch\n\
2131 environment, the value is printed in its own window.");
2132 set_cmd_completer (c, location_completer);
2134 deprecated_add_show_from_set
2135 (add_set_cmd ("max-symbolic-offset", no_class, var_uinteger,
2136 (char *) &max_symbolic_offset,
2137 "Set the largest offset that will be printed in <symbol+1234> form.",
2140 deprecated_add_show_from_set
2141 (add_set_cmd ("symbol-filename", no_class, var_boolean,
2142 (char *) &print_symbol_filename, "\
2143 Set printing of source filename and line number with <symbol>.",
2147 /* For examine/instruction a single byte quantity is specified as
2148 the data. This avoids problems with value_at_lazy() requiring a
2149 valid data type (and rejecting VOID). */
2150 examine_i_type = init_type (TYPE_CODE_INT, 1, 0, "examine_i_type", NULL);
2152 examine_b_type = init_type (TYPE_CODE_INT, 1, 0, "examine_b_type", NULL);
2153 examine_h_type = init_type (TYPE_CODE_INT, 2, 0, "examine_h_type", NULL);
2154 examine_w_type = init_type (TYPE_CODE_INT, 4, 0, "examine_w_type", NULL);
2155 examine_g_type = init_type (TYPE_CODE_INT, 8, 0, "examine_g_type", NULL);