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 Free Software
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"
47 extern int asm_demangle
; /* Whether to demangle syms in asm printouts */
48 extern int addressprint
; /* Whether to print hex addresses in HLL " */
57 /* Last specified output format. */
59 static char last_format
= 'x';
61 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
63 static char last_size
= 'w';
65 /* Default address to examine next. */
67 static CORE_ADDR next_address
;
69 /* Default section to examine next. */
71 static asection
*next_section
;
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 do_examine (struct format_data
, CORE_ADDR addr
,
172 static void print_formatted (struct value
*, int, int, struct ui_file
*);
174 static struct format_data
decode_format (char **, int, int);
176 static void sym_info (char *, int);
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
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. */
189 static struct format_data
190 decode_format (char **string_ptr
, int oformat
, int osize
)
192 struct format_data val
;
193 char *p
= *string_ptr
;
199 if (*p
>= '0' && *p
<= '9')
200 val
.count
= atoi (p
);
201 while (*p
>= '0' && *p
<= '9')
204 /* Now process size or format letters that follow. */
208 if (*p
== 'b' || *p
== 'h' || *p
== 'w' || *p
== 'g')
210 else if (*p
>= 'a' && *p
<= 'z')
216 while (*p
== ' ' || *p
== '\t')
220 /* Set defaults for format and size if not specified. */
221 if (val
.format
== '?')
225 /* Neither has been specified. */
226 val
.format
= oformat
;
230 /* If a size is specified, any format makes a reasonable
231 default except 'i'. */
232 val
.format
= oformat
== 'i' ? 'x' : oformat
;
234 else if (val
.size
== '?')
239 /* Pick the appropriate size for an address. */
240 if (TARGET_PTR_BIT
== 64)
241 val
.size
= osize
? 'g' : osize
;
242 else if (TARGET_PTR_BIT
== 32)
243 val
.size
= osize
? 'w' : osize
;
244 else if (TARGET_PTR_BIT
== 16)
245 val
.size
= osize
? 'h' : osize
;
247 /* Bad value for TARGET_PTR_BIT */
248 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
251 /* Floating point has to be word or giantword. */
252 if (osize
== 'w' || osize
== 'g')
255 /* Default it to giantword if the last used size is not
257 val
.size
= osize
? 'g' : osize
;
260 /* Characters default to one byte. */
261 val
.size
= osize
? 'b' : osize
;
264 /* The default is the size most recently specified. */
271 /* Print value VAL on stream according to FORMAT, a letter or 0.
272 Do not end with a newline.
273 0 means print VAL according to its own type.
274 SIZE is the letter for the size of datum being printed.
275 This is used to pad hex numbers so they line up. */
278 print_formatted (struct value
*val
, int format
, int size
,
279 struct ui_file
*stream
)
281 struct type
*type
= check_typedef (VALUE_TYPE (val
));
282 int len
= TYPE_LENGTH (type
);
284 if (VALUE_LVAL (val
) == lval_memory
)
286 next_address
= VALUE_ADDRESS (val
) + len
;
287 next_section
= VALUE_BFD_SECTION (val
);
293 /* FIXME: Need to handle wchar_t's here... */
294 next_address
= VALUE_ADDRESS (val
)
295 + val_print_string (VALUE_ADDRESS (val
), -1, 1, stream
);
296 next_section
= VALUE_BFD_SECTION (val
);
300 /* The old comment says
301 "Force output out, print_insn not using _filtered".
302 I'm not completely sure what that means, I suspect most print_insn
303 now do use _filtered, so I guess it's obsolete.
304 --Yes, it does filter now, and so this is obsolete. -JB */
306 /* We often wrap here if there are long symbolic names. */
308 next_address
= VALUE_ADDRESS (val
)
309 + gdb_print_insn (VALUE_ADDRESS (val
), stream
);
310 next_section
= VALUE_BFD_SECTION (val
);
315 || TYPE_CODE (type
) == TYPE_CODE_ARRAY
316 || TYPE_CODE (type
) == TYPE_CODE_STRING
317 || TYPE_CODE (type
) == TYPE_CODE_STRUCT
318 || TYPE_CODE (type
) == TYPE_CODE_UNION
319 || TYPE_CODE (type
) == TYPE_CODE_NAMESPACE
)
320 /* If format is 0, use the 'natural' format for
321 * that type of value. If the type is non-scalar,
322 * we have to use language rules to print it as
323 * a series of scalars.
325 value_print (val
, stream
, format
, Val_pretty_default
);
327 /* User specified format, so don't look to the
328 * the type to tell us what to do.
330 print_scalar_formatted (VALUE_CONTENTS (val
), type
,
331 format
, size
, stream
);
335 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
336 according to letters FORMAT and SIZE on STREAM.
337 FORMAT may not be zero. Formats s and i are not supported at this level.
339 This is how the elements of an array or structure are printed
343 print_scalar_formatted (void *valaddr
, struct type
*type
, int format
, int size
,
344 struct ui_file
*stream
)
347 unsigned int len
= TYPE_LENGTH (type
);
349 if (len
> sizeof (LONGEST
)
357 if (!TYPE_UNSIGNED (type
)
358 || !extract_long_unsigned_integer (valaddr
, len
, &val_long
))
360 /* We can't print it normally, but we can print it in hex.
361 Printing it in the wrong radix is more useful than saying
362 "use /x, you dummy". */
363 /* FIXME: we could also do octal or binary if that was the
365 /* FIXME: we should be using the size field to give us a
366 minimum field width to print. */
369 print_octal_chars (stream
, valaddr
, len
);
370 else if (format
== 'd')
371 print_decimal_chars (stream
, valaddr
, len
);
372 else if (format
== 't')
373 print_binary_chars (stream
, valaddr
, len
);
375 /* replace with call to print_hex_chars? Looks
376 like val_print_type_code_int is redoing
379 val_print_type_code_int (type
, valaddr
, stream
);
384 /* If we get here, extract_long_unsigned_integer set val_long. */
386 else if (format
!= 'f')
387 val_long
= unpack_long (type
, valaddr
);
389 /* If the value is a pointer, and pointers and addresses are not the
390 same, then at this point, the value's length (in target bytes) is
391 TARGET_ADDR_BIT/TARGET_CHAR_BIT, not TYPE_LENGTH (type). */
392 if (TYPE_CODE (type
) == TYPE_CODE_PTR
)
393 len
= TARGET_ADDR_BIT
/ TARGET_CHAR_BIT
;
395 /* If we are printing it as unsigned, truncate it in case it is actually
396 a negative signed value (e.g. "print/u (short)-1" should print 65535
397 (if shorts are 16 bits) instead of 4294967295). */
400 if (len
< sizeof (LONGEST
))
401 val_long
&= ((LONGEST
) 1 << HOST_CHAR_BIT
* len
) - 1;
409 /* no size specified, like in print. Print varying # of digits. */
410 print_longest (stream
, 'x', 1, val_long
);
419 print_longest (stream
, size
, 1, val_long
);
422 error ("Undefined output size \"%c\".", size
);
427 print_longest (stream
, 'd', 1, val_long
);
431 print_longest (stream
, 'u', 0, val_long
);
436 print_longest (stream
, 'o', 1, val_long
);
438 fprintf_filtered (stream
, "0");
443 CORE_ADDR addr
= unpack_pointer (type
, valaddr
);
444 print_address (addr
, stream
);
449 value_print (value_from_longest (builtin_type_true_char
, val_long
),
450 stream
, 0, Val_pretty_default
);
454 if (len
== TYPE_LENGTH (builtin_type_float
))
455 type
= builtin_type_float
;
456 else if (len
== TYPE_LENGTH (builtin_type_double
))
457 type
= builtin_type_double
;
458 else if (len
== TYPE_LENGTH (builtin_type_long_double
))
459 type
= builtin_type_long_double
;
460 print_floating (valaddr
, type
, stream
);
464 internal_error (__FILE__
, __LINE__
, "failed internal consistency check");
467 /* Binary; 't' stands for "two". */
469 char bits
[8 * (sizeof val_long
) + 1];
470 char buf
[8 * (sizeof val_long
) + 32];
475 width
= 8 * (sizeof val_long
);
492 error ("Undefined output size \"%c\".", size
);
498 bits
[width
] = (val_long
& 1) ? '1' : '0';
503 while (*cp
&& *cp
== '0')
508 strcpy (buf
, local_binary_format_prefix ());
510 strcat (buf
, local_binary_format_suffix ());
511 fputs_filtered (buf
, stream
);
516 error ("Undefined output format \"%c\".", format
);
520 /* Specify default address for `x' command.
521 `info lines' uses this. */
524 set_next_address (CORE_ADDR addr
)
528 /* Make address available to the user as $_. */
529 set_internalvar (lookup_internalvar ("_"),
530 value_from_pointer (lookup_pointer_type (builtin_type_void
),
534 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
535 after LEADIN. Print nothing if no symbolic name is found nearby.
536 Optionally also print source file and line number, if available.
537 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
538 or to interpret it as a possible C++ name and convert it back to source
539 form. However note that DO_DEMANGLE can be overridden by the specific
540 settings of the demangle and asm_demangle variables. */
543 print_address_symbolic (CORE_ADDR addr
, struct ui_file
*stream
, int do_demangle
,
547 char *filename
= NULL
;
552 /* throw away both name and filename */
553 struct cleanup
*cleanup_chain
= make_cleanup (free_current_contents
, &name
);
554 make_cleanup (free_current_contents
, &filename
);
556 if (build_address_symbolic (addr
, do_demangle
, &name
, &offset
, &filename
, &line
, &unmapped
))
558 do_cleanups (cleanup_chain
);
562 fputs_filtered (leadin
, stream
);
564 fputs_filtered ("<*", stream
);
566 fputs_filtered ("<", stream
);
567 fputs_filtered (name
, stream
);
569 fprintf_filtered (stream
, "+%u", (unsigned int) offset
);
571 /* Append source filename and line number if desired. Give specific
572 line # of this addr, if we have it; else line # of the nearest symbol. */
573 if (print_symbol_filename
&& filename
!= NULL
)
576 fprintf_filtered (stream
, " at %s:%d", filename
, line
);
578 fprintf_filtered (stream
, " in %s", filename
);
581 fputs_filtered ("*>", stream
);
583 fputs_filtered (">", stream
);
585 do_cleanups (cleanup_chain
);
588 /* Given an address ADDR return all the elements needed to print the
589 address in a symbolic form. NAME can be mangled or not depending
590 on DO_DEMANGLE (and also on the asm_demangle global variable,
591 manipulated via ''set print asm-demangle''). Return 0 in case of
592 success, when all the info in the OUT paramters is valid. Return 1
595 build_address_symbolic (CORE_ADDR addr
, /* IN */
596 int do_demangle
, /* IN */
597 char **name
, /* OUT */
598 int *offset
, /* OUT */
599 char **filename
, /* OUT */
601 int *unmapped
) /* OUT */
603 struct minimal_symbol
*msymbol
;
604 struct symbol
*symbol
;
605 struct symtab
*symtab
= 0;
606 CORE_ADDR name_location
= 0;
607 asection
*section
= 0;
608 char *name_temp
= "";
610 /* Let's say it is unmapped. */
613 /* Determine if the address is in an overlay, and whether it is
615 if (overlay_debugging
)
617 section
= find_pc_overlay (addr
);
618 if (pc_in_unmapped_range (addr
, section
))
621 addr
= overlay_mapped_address (addr
, section
);
625 /* First try to find the address in the symbol table, then
626 in the minsyms. Take the closest one. */
628 /* This is defective in the sense that it only finds text symbols. So
629 really this is kind of pointless--we should make sure that the
630 minimal symbols have everything we need (by changing that we could
631 save some memory, but for many debug format--ELF/DWARF or
632 anything/stabs--it would be inconvenient to eliminate those minimal
634 msymbol
= lookup_minimal_symbol_by_pc_section (addr
, section
);
635 symbol
= find_pc_sect_function (addr
, section
);
639 name_location
= BLOCK_START (SYMBOL_BLOCK_VALUE (symbol
));
640 if (do_demangle
|| asm_demangle
)
641 name_temp
= SYMBOL_PRINT_NAME (symbol
);
643 name_temp
= DEPRECATED_SYMBOL_NAME (symbol
);
648 if (SYMBOL_VALUE_ADDRESS (msymbol
) > name_location
|| symbol
== NULL
)
650 /* The msymbol is closer to the address than the symbol;
651 use the msymbol instead. */
654 name_location
= SYMBOL_VALUE_ADDRESS (msymbol
);
655 if (do_demangle
|| asm_demangle
)
656 name_temp
= SYMBOL_PRINT_NAME (msymbol
);
658 name_temp
= DEPRECATED_SYMBOL_NAME (msymbol
);
661 if (symbol
== NULL
&& msymbol
== NULL
)
664 /* If the nearest symbol is too far away, don't print anything symbolic. */
666 /* For when CORE_ADDR is larger than unsigned int, we do math in
667 CORE_ADDR. But when we detect unsigned wraparound in the
668 CORE_ADDR math, we ignore this test and print the offset,
669 because addr+max_symbolic_offset has wrapped through the end
670 of the address space back to the beginning, giving bogus comparison. */
671 if (addr
> name_location
+ max_symbolic_offset
672 && name_location
+ max_symbolic_offset
> name_location
)
675 *offset
= addr
- name_location
;
677 *name
= xstrdup (name_temp
);
679 if (print_symbol_filename
)
681 struct symtab_and_line sal
;
683 sal
= find_pc_sect_line (addr
, section
, 0);
687 *filename
= xstrdup (sal
.symtab
->filename
);
690 else if (symtab
&& symbol
&& symbol
->line
)
692 *filename
= xstrdup (symtab
->filename
);
693 *line
= symbol
->line
;
697 *filename
= xstrdup (symtab
->filename
);
704 /* Print address ADDR on STREAM. USE_LOCAL means the same thing as for
707 print_address_numeric (CORE_ADDR addr
, int use_local
, struct ui_file
*stream
)
709 /* Truncate address to the size of a target address, avoiding shifts
710 larger or equal than the width of a CORE_ADDR. The local
711 variable ADDR_BIT stops the compiler reporting a shift overflow
712 when it won't occur. */
713 /* NOTE: This assumes that the significant address information is
714 kept in the least significant bits of ADDR - the upper bits were
715 either zero or sign extended. Should ADDRESS_TO_POINTER() or
716 some ADDRESS_TO_PRINTABLE() be used to do the conversion? */
718 int addr_bit
= TARGET_ADDR_BIT
;
720 if (addr_bit
< (sizeof (CORE_ADDR
) * HOST_CHAR_BIT
))
721 addr
&= ((CORE_ADDR
) 1 << addr_bit
) - 1;
722 print_longest (stream
, 'x', use_local
, (ULONGEST
) addr
);
725 /* Print address ADDR symbolically on STREAM.
726 First print it as a number. Then perhaps print
727 <SYMBOL + OFFSET> after the number. */
730 print_address (CORE_ADDR addr
, struct ui_file
*stream
)
732 print_address_numeric (addr
, 1, stream
);
733 print_address_symbolic (addr
, stream
, asm_demangle
, " ");
736 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
737 controls whether to print the symbolic name "raw" or demangled.
738 Global setting "addressprint" controls whether to print hex address
742 print_address_demangle (CORE_ADDR addr
, struct ui_file
*stream
, int do_demangle
)
746 fprintf_filtered (stream
, "0");
748 else if (addressprint
)
750 print_address_numeric (addr
, 1, stream
);
751 print_address_symbolic (addr
, stream
, do_demangle
, " ");
755 print_address_symbolic (addr
, stream
, do_demangle
, "");
760 /* These are the types that $__ will get after an examine command of one
763 static struct type
*examine_i_type
;
765 static struct type
*examine_b_type
;
766 static struct type
*examine_h_type
;
767 static struct type
*examine_w_type
;
768 static struct type
*examine_g_type
;
770 /* Examine data at address ADDR in format FMT.
771 Fetch it from memory and print on gdb_stdout. */
774 do_examine (struct format_data fmt
, CORE_ADDR addr
, asection
*sect
)
779 struct type
*val_type
= NULL
;
789 /* String or instruction format implies fetch single bytes
790 regardless of the specified size. */
791 if (format
== 's' || format
== 'i')
795 val_type
= examine_i_type
;
796 else if (size
== 'b')
797 val_type
= examine_b_type
;
798 else if (size
== 'h')
799 val_type
= examine_h_type
;
800 else if (size
== 'w')
801 val_type
= examine_w_type
;
802 else if (size
== 'g')
803 val_type
= examine_g_type
;
810 if (format
== 's' || format
== 'i')
813 /* Print as many objects as specified in COUNT, at most maxelts per line,
814 with the address of the next one at the start of each line. */
819 print_address (next_address
, gdb_stdout
);
820 printf_filtered (":");
825 printf_filtered ("\t");
826 /* Note that print_formatted sets next_address for the next
828 last_examine_address
= next_address
;
830 if (last_examine_value
)
831 value_free (last_examine_value
);
833 /* The value to be displayed is not fetched greedily.
834 Instead, to avoid the posibility of a fetched value not
835 being used, its retreval is delayed until the print code
836 uses it. When examining an instruction stream, the
837 disassembler will perform its own memory fetch using just
838 the address stored in LAST_EXAMINE_VALUE. FIXME: Should
839 the disassembler be modified so that LAST_EXAMINE_VALUE
840 is left with the byte sequence from the last complete
841 instruction fetched from memory? */
842 last_examine_value
= value_at_lazy (val_type
, next_address
, sect
);
844 if (last_examine_value
)
845 release_value (last_examine_value
);
847 print_formatted (last_examine_value
, format
, size
, gdb_stdout
);
849 printf_filtered ("\n");
850 gdb_flush (gdb_stdout
);
855 validate_format (struct format_data fmt
, char *cmdname
)
858 error ("Size letters are meaningless in \"%s\" command.", cmdname
);
860 error ("Item count other than 1 is meaningless in \"%s\" command.",
862 if (fmt
.format
== 'i' || fmt
.format
== 's')
863 error ("Format letter \"%c\" is meaningless in \"%s\" command.",
864 fmt
.format
, cmdname
);
867 /* Evaluate string EXP as an expression in the current language and
868 print the resulting value. EXP may contain a format specifier as the
869 first argument ("/x myvar" for example, to print myvar in hex).
873 print_command_1 (char *exp
, int inspect
, int voidprint
)
875 struct expression
*expr
;
876 struct cleanup
*old_chain
= 0;
879 struct format_data fmt
;
882 /* Pass inspect flag to the rest of the print routines in a global (sigh). */
883 inspect_it
= inspect
;
885 if (exp
&& *exp
== '/')
888 fmt
= decode_format (&exp
, last_format
, 0);
889 validate_format (fmt
, "print");
890 last_format
= format
= fmt
.format
;
902 expr
= parse_expression (exp
);
903 old_chain
= make_cleanup (free_current_contents
, &expr
);
905 val
= evaluate_expression (expr
);
908 val
= access_value_history (0);
910 if (voidprint
|| (val
&& VALUE_TYPE (val
) &&
911 TYPE_CODE (VALUE_TYPE (val
)) != TYPE_CODE_VOID
))
913 int histindex
= record_latest_value (val
);
916 annotate_value_history_begin (histindex
, VALUE_TYPE (val
));
918 annotate_value_begin (VALUE_TYPE (val
));
921 printf_unfiltered ("\031(gdb-makebuffer \"%s\" %d '(\"", exp
, histindex
);
922 else if (histindex
>= 0)
923 printf_filtered ("$%d = ", histindex
);
926 annotate_value_history_value ();
928 print_formatted (val
, format
, fmt
.size
, gdb_stdout
);
929 printf_filtered ("\n");
932 annotate_value_history_end ();
934 annotate_value_end ();
937 printf_unfiltered ("\") )\030");
941 do_cleanups (old_chain
);
942 inspect_it
= 0; /* Reset print routines to normal */
946 print_command (char *exp
, int from_tty
)
948 print_command_1 (exp
, 0, 1);
951 /* Same as print, except in epoch, it gets its own window */
953 inspect_command (char *exp
, int from_tty
)
955 extern int epoch_interface
;
957 print_command_1 (exp
, epoch_interface
, 1);
960 /* Same as print, except it doesn't print void results. */
962 call_command (char *exp
, int from_tty
)
964 print_command_1 (exp
, 0, 0);
968 output_command (char *exp
, int from_tty
)
970 struct expression
*expr
;
971 struct cleanup
*old_chain
;
974 struct format_data fmt
;
976 if (exp
&& *exp
== '/')
979 fmt
= decode_format (&exp
, 0, 0);
980 validate_format (fmt
, "output");
984 expr
= parse_expression (exp
);
985 old_chain
= make_cleanup (free_current_contents
, &expr
);
987 val
= evaluate_expression (expr
);
989 annotate_value_begin (VALUE_TYPE (val
));
991 print_formatted (val
, format
, fmt
.size
, gdb_stdout
);
993 annotate_value_end ();
996 gdb_flush (gdb_stdout
);
998 do_cleanups (old_chain
);
1002 set_command (char *exp
, int from_tty
)
1004 struct expression
*expr
= parse_expression (exp
);
1005 struct cleanup
*old_chain
=
1006 make_cleanup (free_current_contents
, &expr
);
1007 evaluate_expression (expr
);
1008 do_cleanups (old_chain
);
1012 sym_info (char *arg
, int from_tty
)
1014 struct minimal_symbol
*msymbol
;
1015 struct objfile
*objfile
;
1016 struct obj_section
*osect
;
1018 CORE_ADDR addr
, sect_addr
;
1020 unsigned int offset
;
1023 error_no_arg ("address");
1025 addr
= parse_and_eval_address (arg
);
1026 ALL_OBJSECTIONS (objfile
, osect
)
1028 sect
= osect
->the_bfd_section
;
1029 sect_addr
= overlay_mapped_address (addr
, sect
);
1031 if (osect
->addr
<= sect_addr
&& sect_addr
< osect
->endaddr
&&
1032 (msymbol
= lookup_minimal_symbol_by_pc_section (sect_addr
, sect
)))
1035 offset
= sect_addr
- SYMBOL_VALUE_ADDRESS (msymbol
);
1037 printf_filtered ("%s + %u in ",
1038 SYMBOL_PRINT_NAME (msymbol
), offset
);
1040 printf_filtered ("%s in ",
1041 SYMBOL_PRINT_NAME (msymbol
));
1042 if (pc_in_unmapped_range (addr
, sect
))
1043 printf_filtered ("load address range of ");
1044 if (section_is_overlay (sect
))
1045 printf_filtered ("%s overlay ",
1046 section_is_mapped (sect
) ? "mapped" : "unmapped");
1047 printf_filtered ("section %s", sect
->name
);
1048 printf_filtered ("\n");
1052 printf_filtered ("No symbol matches %s.\n", arg
);
1056 address_info (char *exp
, int from_tty
)
1059 struct minimal_symbol
*msymbol
;
1063 CORE_ADDR load_addr
;
1064 int is_a_field_of_this
; /* C++: lookup_symbol sets this to nonzero
1065 if exp is a field of `this'. */
1068 error ("Argument required.");
1070 sym
= lookup_symbol (exp
, get_selected_block (0), VAR_DOMAIN
,
1071 &is_a_field_of_this
, (struct symtab
**) NULL
);
1074 if (is_a_field_of_this
)
1076 printf_filtered ("Symbol \"");
1077 fprintf_symbol_filtered (gdb_stdout
, exp
,
1078 current_language
->la_language
, DMGL_ANSI
);
1079 printf_filtered ("\" is a field of the local class variable ");
1080 if (current_language
->la_language
== language_objc
)
1081 printf_filtered ("`self'\n"); /* ObjC equivalent of "this" */
1083 printf_filtered ("`this'\n");
1087 msymbol
= lookup_minimal_symbol (exp
, NULL
, NULL
);
1089 if (msymbol
!= NULL
)
1091 load_addr
= SYMBOL_VALUE_ADDRESS (msymbol
);
1093 printf_filtered ("Symbol \"");
1094 fprintf_symbol_filtered (gdb_stdout
, exp
,
1095 current_language
->la_language
, DMGL_ANSI
);
1096 printf_filtered ("\" is at ");
1097 print_address_numeric (load_addr
, 1, gdb_stdout
);
1098 printf_filtered (" in a file compiled without debugging");
1099 section
= SYMBOL_BFD_SECTION (msymbol
);
1100 if (section_is_overlay (section
))
1102 load_addr
= overlay_unmapped_address (load_addr
, section
);
1103 printf_filtered (",\n -- loaded at ");
1104 print_address_numeric (load_addr
, 1, gdb_stdout
);
1105 printf_filtered (" in overlay section %s", section
->name
);
1107 printf_filtered (".\n");
1110 error ("No symbol \"%s\" in current context.", exp
);
1114 printf_filtered ("Symbol \"");
1115 fprintf_symbol_filtered (gdb_stdout
, DEPRECATED_SYMBOL_NAME (sym
),
1116 current_language
->la_language
, DMGL_ANSI
);
1117 printf_filtered ("\" is ");
1118 val
= SYMBOL_VALUE (sym
);
1119 basereg
= SYMBOL_BASEREG (sym
);
1120 section
= SYMBOL_BFD_SECTION (sym
);
1122 switch (SYMBOL_CLASS (sym
))
1125 case LOC_CONST_BYTES
:
1126 printf_filtered ("constant");
1130 printf_filtered ("a label at address ");
1131 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1133 if (section_is_overlay (section
))
1135 load_addr
= overlay_unmapped_address (load_addr
, section
);
1136 printf_filtered (",\n -- loaded at ");
1137 print_address_numeric (load_addr
, 1, gdb_stdout
);
1138 printf_filtered (" in overlay section %s", section
->name
);
1143 case LOC_COMPUTED_ARG
:
1144 (SYMBOL_LOCATION_FUNCS (sym
)->describe_location
) (sym
, gdb_stdout
);
1148 printf_filtered ("a variable in register %s", REGISTER_NAME (val
));
1152 printf_filtered ("static storage at address ");
1153 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
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 ("external global (indirect addressing), at address *(");
1166 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (sym
),
1168 printf_filtered (")");
1169 if (section_is_overlay (section
))
1171 load_addr
= overlay_unmapped_address (load_addr
, section
);
1172 printf_filtered (",\n -- loaded at ");
1173 print_address_numeric (load_addr
, 1, gdb_stdout
);
1174 printf_filtered (" in overlay section %s", section
->name
);
1179 printf_filtered ("an argument in register %s", REGISTER_NAME (val
));
1182 case LOC_REGPARM_ADDR
:
1183 printf_filtered ("address of an argument in register %s", REGISTER_NAME (val
));
1187 printf_filtered ("an argument at offset %ld", val
);
1191 printf_filtered ("an argument at frame offset %ld", val
);
1195 printf_filtered ("a local variable at frame offset %ld", val
);
1199 printf_filtered ("a reference argument at offset %ld", val
);
1203 printf_filtered ("a variable at offset %ld from register %s",
1204 val
, REGISTER_NAME (basereg
));
1207 case LOC_BASEREG_ARG
:
1208 printf_filtered ("an argument at offset %ld from register %s",
1209 val
, REGISTER_NAME (basereg
));
1213 printf_filtered ("a typedef");
1217 printf_filtered ("a function at address ");
1218 print_address_numeric (load_addr
= BLOCK_START (SYMBOL_BLOCK_VALUE (sym
)),
1220 if (section_is_overlay (section
))
1222 load_addr
= overlay_unmapped_address (load_addr
, section
);
1223 printf_filtered (",\n -- loaded at ");
1224 print_address_numeric (load_addr
, 1, gdb_stdout
);
1225 printf_filtered (" in overlay section %s", section
->name
);
1229 case LOC_UNRESOLVED
:
1231 struct minimal_symbol
*msym
;
1233 msym
= lookup_minimal_symbol (DEPRECATED_SYMBOL_NAME (sym
), NULL
, NULL
);
1235 printf_filtered ("unresolved");
1238 section
= SYMBOL_BFD_SECTION (msym
);
1239 printf_filtered ("static storage at address ");
1240 print_address_numeric (load_addr
= SYMBOL_VALUE_ADDRESS (msym
),
1242 if (section_is_overlay (section
))
1244 load_addr
= overlay_unmapped_address (load_addr
, section
);
1245 printf_filtered (",\n -- loaded at ");
1246 print_address_numeric (load_addr
, 1, gdb_stdout
);
1247 printf_filtered (" in overlay section %s", section
->name
);
1253 case LOC_HP_THREAD_LOCAL_STATIC
:
1255 "a thread-local variable at offset %ld from the thread base register %s",
1256 val
, REGISTER_NAME (basereg
));
1259 case LOC_OPTIMIZED_OUT
:
1260 printf_filtered ("optimized out");
1264 printf_filtered ("of unknown (botched) type");
1267 printf_filtered (".\n");
1271 x_command (char *exp
, int from_tty
)
1273 struct expression
*expr
;
1274 struct format_data fmt
;
1275 struct cleanup
*old_chain
;
1278 fmt
.format
= last_format
;
1279 fmt
.size
= last_size
;
1282 if (exp
&& *exp
== '/')
1285 fmt
= decode_format (&exp
, last_format
, last_size
);
1288 /* If we have an expression, evaluate it and use it as the address. */
1290 if (exp
!= 0 && *exp
!= 0)
1292 expr
= parse_expression (exp
);
1293 /* Cause expression not to be there any more
1294 if this command is repeated with Newline.
1295 But don't clobber a user-defined command's definition. */
1298 old_chain
= make_cleanup (free_current_contents
, &expr
);
1299 val
= evaluate_expression (expr
);
1300 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_REF
)
1301 val
= value_ind (val
);
1302 /* In rvalue contexts, such as this, functions are coerced into
1303 pointers to functions. This makes "x/i main" work. */
1304 if (/* last_format == 'i' && */
1305 TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_FUNC
1306 && VALUE_LVAL (val
) == lval_memory
)
1307 next_address
= VALUE_ADDRESS (val
);
1309 next_address
= value_as_address (val
);
1310 if (VALUE_BFD_SECTION (val
))
1311 next_section
= VALUE_BFD_SECTION (val
);
1312 do_cleanups (old_chain
);
1315 do_examine (fmt
, next_address
, next_section
);
1317 /* If the examine succeeds, we remember its size and format for next time. */
1318 last_size
= fmt
.size
;
1319 last_format
= fmt
.format
;
1321 /* Set a couple of internal variables if appropriate. */
1322 if (last_examine_value
)
1324 /* Make last address examined available to the user as $_. Use
1325 the correct pointer type. */
1326 struct type
*pointer_type
1327 = lookup_pointer_type (VALUE_TYPE (last_examine_value
));
1328 set_internalvar (lookup_internalvar ("_"),
1329 value_from_pointer (pointer_type
,
1330 last_examine_address
));
1332 /* Make contents of last address examined available to the user as $__. */
1333 /* If the last value has not been fetched from memory then don't
1334 fetch it now - instead mark it by voiding the $__ variable. */
1335 if (VALUE_LAZY (last_examine_value
))
1336 set_internalvar (lookup_internalvar ("__"),
1337 allocate_value (builtin_type_void
));
1339 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1344 /* Add an expression to the auto-display chain.
1345 Specify the expression. */
1348 display_command (char *exp
, int from_tty
)
1350 struct format_data fmt
;
1351 struct expression
*expr
;
1352 struct display
*new;
1356 /* NOTE: cagney/2003-02-13 The `tui_active' was previously
1358 if (tui_active
&& *exp
== '$')
1359 display_it
= (tui_set_layout (exp
) == TUI_FAILURE
);
1373 fmt
= decode_format (&exp
, 0, 0);
1374 if (fmt
.size
&& fmt
.format
== 0)
1376 if (fmt
.format
== 'i' || fmt
.format
== 's')
1386 innermost_block
= 0;
1387 expr
= parse_expression (exp
);
1389 new = (struct display
*) xmalloc (sizeof (struct display
));
1392 new->block
= innermost_block
;
1393 new->next
= display_chain
;
1394 new->number
= ++display_number
;
1397 display_chain
= new;
1399 if (from_tty
&& target_has_execution
)
1400 do_one_display (new);
1407 free_display (struct display
*d
)
1413 /* Clear out the display_chain.
1414 Done when new symtabs are loaded, since this invalidates
1415 the types stored in many expressions. */
1418 clear_displays (void)
1422 while ((d
= display_chain
) != NULL
)
1425 display_chain
= d
->next
;
1430 /* Delete the auto-display number NUM. */
1433 delete_display (int num
)
1435 struct display
*d1
, *d
;
1438 error ("No display number %d.", num
);
1440 if (display_chain
->number
== num
)
1443 display_chain
= d1
->next
;
1447 for (d
= display_chain
;; d
= d
->next
)
1450 error ("No display number %d.", num
);
1451 if (d
->next
->number
== num
)
1461 /* Delete some values from the auto-display chain.
1462 Specify the element numbers. */
1465 undisplay_command (char *args
, int from_tty
)
1473 if (query ("Delete all auto-display expressions? "))
1482 while (*p1
>= '0' && *p1
<= '9')
1484 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1485 error ("Arguments must be display numbers.");
1489 delete_display (num
);
1492 while (*p
== ' ' || *p
== '\t')
1498 /* Display a single auto-display.
1499 Do nothing if the display cannot be printed in the current context,
1500 or if the display is disabled. */
1503 do_one_display (struct display
*d
)
1505 int within_current_scope
;
1507 if (d
->enabled_p
== 0)
1511 within_current_scope
= contained_in (get_selected_block (0), d
->block
);
1513 within_current_scope
= 1;
1514 if (!within_current_scope
)
1517 current_display_number
= d
->number
;
1519 annotate_display_begin ();
1520 printf_filtered ("%d", d
->number
);
1521 annotate_display_number_end ();
1522 printf_filtered (": ");
1528 annotate_display_format ();
1530 printf_filtered ("x/");
1531 if (d
->format
.count
!= 1)
1532 printf_filtered ("%d", d
->format
.count
);
1533 printf_filtered ("%c", d
->format
.format
);
1534 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1535 printf_filtered ("%c", d
->format
.size
);
1536 printf_filtered (" ");
1538 annotate_display_expression ();
1540 print_expression (d
->exp
, gdb_stdout
);
1541 annotate_display_expression_end ();
1543 if (d
->format
.count
!= 1)
1544 printf_filtered ("\n");
1546 printf_filtered (" ");
1548 val
= evaluate_expression (d
->exp
);
1549 addr
= value_as_address (val
);
1550 if (d
->format
.format
== 'i')
1551 addr
= ADDR_BITS_REMOVE (addr
);
1553 annotate_display_value ();
1555 do_examine (d
->format
, addr
, VALUE_BFD_SECTION (val
));
1559 annotate_display_format ();
1561 if (d
->format
.format
)
1562 printf_filtered ("/%c ", d
->format
.format
);
1564 annotate_display_expression ();
1566 print_expression (d
->exp
, gdb_stdout
);
1567 annotate_display_expression_end ();
1569 printf_filtered (" = ");
1571 annotate_display_expression ();
1573 print_formatted (evaluate_expression (d
->exp
),
1574 d
->format
.format
, d
->format
.size
, gdb_stdout
);
1575 printf_filtered ("\n");
1578 annotate_display_end ();
1580 gdb_flush (gdb_stdout
);
1581 current_display_number
= -1;
1584 /* Display all of the values on the auto-display chain which can be
1585 evaluated in the current scope. */
1592 for (d
= display_chain
; d
; d
= d
->next
)
1596 /* Delete the auto-display which we were in the process of displaying.
1597 This is done when there is an error or a signal. */
1600 disable_display (int num
)
1604 for (d
= display_chain
; d
; d
= d
->next
)
1605 if (d
->number
== num
)
1610 printf_unfiltered ("No display number %d.\n", num
);
1614 disable_current_display (void)
1616 if (current_display_number
>= 0)
1618 disable_display (current_display_number
);
1619 fprintf_unfiltered (gdb_stderr
, "Disabling display %d to avoid infinite recursion.\n",
1620 current_display_number
);
1622 current_display_number
= -1;
1626 display_info (char *ignore
, int from_tty
)
1631 printf_unfiltered ("There are no auto-display expressions now.\n");
1633 printf_filtered ("Auto-display expressions now in effect:\n\
1634 Num Enb Expression\n");
1636 for (d
= display_chain
; d
; d
= d
->next
)
1638 printf_filtered ("%d: %c ", d
->number
, "ny"[(int) d
->enabled_p
]);
1640 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1642 else if (d
->format
.format
)
1643 printf_filtered ("/%c ", d
->format
.format
);
1644 print_expression (d
->exp
, gdb_stdout
);
1645 if (d
->block
&& !contained_in (get_selected_block (0), d
->block
))
1646 printf_filtered (" (cannot be evaluated in the current context)");
1647 printf_filtered ("\n");
1648 gdb_flush (gdb_stdout
);
1653 enable_display (char *args
, int from_tty
)
1662 for (d
= display_chain
; d
; d
= d
->next
)
1669 while (*p1
>= '0' && *p1
<= '9')
1671 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1672 error ("Arguments must be display numbers.");
1676 for (d
= display_chain
; d
; d
= d
->next
)
1677 if (d
->number
== num
)
1682 printf_unfiltered ("No display number %d.\n", num
);
1685 while (*p
== ' ' || *p
== '\t')
1691 disable_display_command (char *args
, int from_tty
)
1699 for (d
= display_chain
; d
; d
= d
->next
)
1706 while (*p1
>= '0' && *p1
<= '9')
1708 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1709 error ("Arguments must be display numbers.");
1711 disable_display (atoi (p
));
1714 while (*p
== ' ' || *p
== '\t')
1720 /* Print the value in stack frame FRAME of a variable
1721 specified by a struct symbol. */
1724 print_variable_value (struct symbol
*var
, struct frame_info
*frame
,
1725 struct ui_file
*stream
)
1727 struct value
*val
= read_var_value (var
, frame
);
1729 value_print (val
, stream
, 0, Val_pretty_default
);
1733 printf_command (char *arg
, int from_tty
)
1737 char *string
= NULL
;
1738 struct value
**val_args
;
1740 char *current_substring
;
1742 int allocated_args
= 20;
1743 struct cleanup
*old_cleanups
;
1745 val_args
= (struct value
**) xmalloc (allocated_args
1746 * sizeof (struct value
*));
1747 old_cleanups
= make_cleanup (free_current_contents
, &val_args
);
1750 error_no_arg ("format-control string and values to print");
1752 /* Skip white space before format string */
1753 while (*s
== ' ' || *s
== '\t')
1756 /* A format string should follow, enveloped in double quotes */
1758 error ("Bad format string, missing '\"'.");
1760 /* Parse the format-control string and copy it into the string STRING,
1761 processing some kinds of escape sequence. */
1763 f
= string
= (char *) alloca (strlen (s
) + 1);
1771 error ("Bad format string, non-terminated '\"'.");
1804 /* ??? TODO: handle other escape sequences */
1805 error ("Unrecognized escape character \\%c in format string.",
1815 /* Skip over " and following space and comma. */
1818 while (*s
== ' ' || *s
== '\t')
1821 if (*s
!= ',' && *s
!= 0)
1822 error ("Invalid argument syntax");
1826 while (*s
== ' ' || *s
== '\t')
1829 /* Need extra space for the '\0's. Doubling the size is sufficient. */
1830 substrings
= alloca (strlen (string
) * 2);
1831 current_substring
= substrings
;
1834 /* Now scan the string for %-specs and see what kinds of args they want.
1835 argclass[I] classifies the %-specs so we can give printf_filtered
1836 something of the right size. */
1840 no_arg
, int_arg
, string_arg
, double_arg
, long_long_arg
1842 enum argclass
*argclass
;
1843 enum argclass this_argclass
;
1849 argclass
= (enum argclass
*) alloca (strlen (s
) * sizeof *argclass
);
1857 while (strchr ("0123456789.hlL-+ #", *f
))
1859 if (*f
== 'l' || *f
== 'L')
1866 this_argclass
= string_arg
;
1872 this_argclass
= double_arg
;
1876 error ("`*' not supported for precision or width in printf");
1879 error ("Format specifier `n' not supported in printf");
1882 this_argclass
= no_arg
;
1887 this_argclass
= long_long_arg
;
1889 this_argclass
= int_arg
;
1893 if (this_argclass
!= no_arg
)
1895 strncpy (current_substring
, last_arg
, f
- last_arg
);
1896 current_substring
+= f
- last_arg
;
1897 *current_substring
++ = '\0';
1899 argclass
[nargs_wanted
++] = this_argclass
;
1903 /* Now, parse all arguments and evaluate them.
1904 Store the VALUEs in VAL_ARGS. */
1909 if (nargs
== allocated_args
)
1910 val_args
= (struct value
**) xrealloc ((char *) val_args
,
1911 (allocated_args
*= 2)
1912 * sizeof (struct value
*));
1914 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
1916 /* If format string wants a float, unchecked-convert the value to
1917 floating point of the same size */
1919 if (argclass
[nargs
] == double_arg
)
1921 struct type
*type
= VALUE_TYPE (val_args
[nargs
]);
1922 if (TYPE_LENGTH (type
) == sizeof (float))
1923 VALUE_TYPE (val_args
[nargs
]) = builtin_type_float
;
1924 if (TYPE_LENGTH (type
) == sizeof (double))
1925 VALUE_TYPE (val_args
[nargs
]) = builtin_type_double
;
1933 if (nargs
!= nargs_wanted
)
1934 error ("Wrong number of arguments for specified format-string");
1936 /* Now actually print them. */
1937 current_substring
= substrings
;
1938 for (i
= 0; i
< nargs
; i
++)
1940 switch (argclass
[i
])
1947 tem
= value_as_address (val_args
[i
]);
1949 /* This is a %s argument. Find the length of the string. */
1954 read_memory (tem
+ j
, &c
, 1);
1959 /* Copy the string contents into a string inside GDB. */
1960 str
= (char *) alloca (j
+ 1);
1962 read_memory (tem
, str
, j
);
1965 printf_filtered (current_substring
, str
);
1970 double val
= value_as_double (val_args
[i
]);
1971 printf_filtered (current_substring
, val
);
1975 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
1977 long long val
= value_as_long (val_args
[i
]);
1978 printf_filtered (current_substring
, val
);
1982 error ("long long not supported in printf");
1986 /* FIXME: there should be separate int_arg and long_arg. */
1987 long val
= value_as_long (val_args
[i
]);
1988 printf_filtered (current_substring
, val
);
1991 default: /* purecov: deadcode */
1992 error ("internal error in printf_command"); /* purecov: deadcode */
1994 /* Skip to the next substring. */
1995 current_substring
+= strlen (current_substring
) + 1;
1997 /* Print the portion of the format string after the last argument. */
1998 puts_filtered (last_arg
);
2000 do_cleanups (old_cleanups
);
2004 _initialize_printcmd (void)
2006 struct cmd_list_element
*c
;
2008 current_display_number
= -1;
2010 add_info ("address", address_info
,
2011 "Describe where symbol SYM is stored.");
2013 add_info ("symbol", sym_info
,
2014 "Describe what symbol is at location ADDR.\n\
2015 Only for symbols with fixed locations (global or static scope).");
2017 add_com ("x", class_vars
, x_command
,
2018 concat ("Examine memory: x/FMT ADDRESS.\n\
2019 ADDRESS is an expression for the memory address to examine.\n\
2020 FMT is a repeat count followed by a format letter and a size letter.\n\
2021 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
2022 t(binary), f(float), a(address), i(instruction), c(char) and s(string).\n",
2023 "Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
2024 The specified number of objects of the specified size are printed\n\
2025 according to the format.\n\n\
2026 Defaults for format and size letters are those previously used.\n\
2027 Default count is 1. Default address is following last thing printed\n\
2028 with this command or \"print\".", NULL
));
2031 add_com ("whereis", class_vars
, whereis_command
,
2032 "Print line number and file of definition of variable.");
2035 add_info ("display", display_info
,
2036 "Expressions to display when program stops, with code numbers.");
2038 add_cmd ("undisplay", class_vars
, undisplay_command
,
2039 "Cancel some expressions to be displayed when program stops.\n\
2040 Arguments are the code numbers of the expressions to stop displaying.\n\
2041 No argument means cancel all automatic-display expressions.\n\
2042 \"delete display\" has the same effect as this command.\n\
2043 Do \"info display\" to see current list of code numbers.",
2046 add_com ("display", class_vars
, display_command
,
2047 "Print value of expression EXP each time the program stops.\n\
2048 /FMT may be used before EXP as in the \"print\" command.\n\
2049 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
2050 as in the \"x\" command, and then EXP is used to get the address to examine\n\
2051 and examining is done as in the \"x\" command.\n\n\
2052 With no argument, display all currently requested auto-display expressions.\n\
2053 Use \"undisplay\" to cancel display requests previously made."
2056 add_cmd ("display", class_vars
, enable_display
,
2057 "Enable some expressions to be displayed when program stops.\n\
2058 Arguments are the code numbers of the expressions to resume displaying.\n\
2059 No argument means enable all automatic-display expressions.\n\
2060 Do \"info display\" to see current list of code numbers.", &enablelist
);
2062 add_cmd ("display", class_vars
, disable_display_command
,
2063 "Disable some expressions to be displayed when program stops.\n\
2064 Arguments are the code numbers of the expressions to stop displaying.\n\
2065 No argument means disable all automatic-display expressions.\n\
2066 Do \"info display\" to see current list of code numbers.", &disablelist
);
2068 add_cmd ("display", class_vars
, undisplay_command
,
2069 "Cancel some expressions to be displayed when program stops.\n\
2070 Arguments are the code numbers of the expressions to stop displaying.\n\
2071 No argument means cancel all automatic-display expressions.\n\
2072 Do \"info display\" to see current list of code numbers.", &deletelist
);
2074 add_com ("printf", class_vars
, printf_command
,
2075 "printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
2076 This is useful for formatted output in user-defined commands.");
2078 add_com ("output", class_vars
, output_command
,
2079 "Like \"print\" but don't put in value history and don't print newline.\n\
2080 This is useful in user-defined commands.");
2082 add_prefix_cmd ("set", class_vars
, set_command
,
2083 concat ("Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2084 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2085 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2086 with $), a register (a few standard names starting with $), or an actual\n\
2087 variable in the program being debugged. EXP is any valid expression.\n",
2088 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2089 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2090 You can see these environment settings with the \"show\" command.", NULL
),
2091 &setlist
, "set ", 1, &cmdlist
);
2093 add_com ("assign", class_vars
, set_command
, concat ("Evaluate expression \
2094 EXP and assign result to variable VAR, using assignment\n\
2095 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2096 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2097 with $), a register (a few standard names starting with $), or an actual\n\
2098 variable in the program being debugged. EXP is any valid expression.\n",
2099 "Use \"set variable\" for variables with names identical to set subcommands.\n\
2100 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
2101 You can see these environment settings with the \"show\" command.", NULL
));
2103 /* "call" is the same as "set", but handy for dbx users to call fns. */
2104 c
= add_com ("call", class_vars
, call_command
,
2105 "Call a function in the program.\n\
2106 The argument is the function name and arguments, in the notation of the\n\
2107 current working language. The result is printed and saved in the value\n\
2108 history, if it is not void.");
2109 set_cmd_completer (c
, location_completer
);
2111 add_cmd ("variable", class_vars
, set_command
,
2112 "Evaluate expression EXP and assign result to variable VAR, using assignment\n\
2113 syntax appropriate for the current language (VAR = EXP or VAR := EXP for\n\
2114 example). VAR may be a debugger \"convenience\" variable (names starting\n\
2115 with $), a register (a few standard names starting with $), or an actual\n\
2116 variable in the program being debugged. EXP is any valid expression.\n\
2117 This may usually be abbreviated to simply \"set\".",
2120 c
= add_com ("print", class_vars
, print_command
,
2121 concat ("Print value of expression EXP.\n\
2122 Variables accessible are those of the lexical environment of the selected\n\
2123 stack frame, plus all those whose scope is global or an entire file.\n\
2125 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
2126 $$NUM refers to NUM'th value back from the last one.\n\
2127 Names starting with $ refer to registers (with the values they would have\n",
2128 "if the program were to return to the stack frame now selected, restoring\n\
2129 all registers saved by frames farther in) or else to debugger\n\
2130 \"convenience\" variables (any such name not a known register).\n\
2131 Use assignment expressions to give values to convenience variables.\n",
2133 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2134 @ is a binary operator for treating consecutive data objects\n\
2135 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2136 element is FOO, whose second element is stored in the space following\n\
2137 where FOO is stored, etc. FOO must be an expression whose value\n\
2138 resides in memory.\n",
2140 EXP may be preceded with /FMT, where FMT is a format letter\n\
2141 but no count or size letter (see \"x\" command).", NULL
));
2142 set_cmd_completer (c
, location_completer
);
2143 add_com_alias ("p", "print", class_vars
, 1);
2145 c
= add_com ("inspect", class_vars
, inspect_command
,
2146 "Same as \"print\" command, except that if you are running in the epoch\n\
2147 environment, the value is printed in its own window.");
2148 set_cmd_completer (c
, location_completer
);
2151 add_set_cmd ("max-symbolic-offset", no_class
, var_uinteger
,
2152 (char *) &max_symbolic_offset
,
2153 "Set the largest offset that will be printed in <symbol+1234> form.",
2157 add_set_cmd ("symbol-filename", no_class
, var_boolean
,
2158 (char *) &print_symbol_filename
,
2159 "Set printing of source filename and line number with <symbol>.",
2163 /* For examine/instruction a single byte quantity is specified as
2164 the data. This avoids problems with value_at_lazy() requiring a
2165 valid data type (and rejecting VOID). */
2166 examine_i_type
= init_type (TYPE_CODE_INT
, 1, 0, "examine_i_type", NULL
);
2168 examine_b_type
= init_type (TYPE_CODE_INT
, 1, 0, "examine_b_type", NULL
);
2169 examine_h_type
= init_type (TYPE_CODE_INT
, 2, 0, "examine_h_type", NULL
);
2170 examine_w_type
= init_type (TYPE_CODE_INT
, 4, 0, "examine_w_type", NULL
);
2171 examine_g_type
= init_type (TYPE_CODE_INT
, 8, 0, "examine_g_type", NULL
);