1 /* Print values for GNU debugger GDB.
2 Copyright 1986, 1987, 1988, 1989, 1990, 1991 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
27 #include "expression.h"
31 #include "breakpoint.h"
34 extern int asm_demangle
; /* Whether to demangle syms in asm printouts */
35 extern int addressprint
; /* Whether to print hex addresses in HLL " */
44 /* Last specified output format. */
46 static char last_format
= 'x';
48 /* Last specified examination size. 'b', 'h', 'w' or `q'. */
50 static char last_size
= 'w';
52 /* Default address to examine next. */
54 static CORE_ADDR next_address
;
56 /* Last address examined. */
58 static CORE_ADDR last_examine_address
;
60 /* Contents of last address examined.
61 This is not valid past the end of the `x' command! */
63 static value last_examine_value
;
65 /* Number of auto-display expression currently being displayed.
66 So that we can deleted it if we get an error or a signal within it.
67 -1 when not doing one. */
69 int current_display_number
;
71 /* Flag to low-level print routines that this value is being printed
72 in an epoch window. We'd like to pass this as a parameter, but
73 every routine would need to take it. Perhaps we can encapsulate
74 this in the I/O stream once we have GNU stdio. */
80 /* Chain link to next auto-display item. */
82 /* Expression to be evaluated and displayed. */
83 struct expression
*exp
;
84 /* Item number of this auto-display item. */
86 /* Display format specified. */
87 struct format_data format
;
88 /* Innermost block required by this expression when evaluated */
90 /* Status of this display (enabled or disabled) */
94 /* Chain of expressions whose values should be displayed
95 automatically each time the program stops. */
97 static struct display
*display_chain
;
99 static int display_number
;
101 /* Prototypes for local functions */
104 delete_display
PARAMS ((int));
107 enable_display
PARAMS ((char *, int));
110 disable_display_command
PARAMS ((char *, int));
113 disassemble_command
PARAMS ((char *, int));
116 containing_function_bounds
PARAMS ((CORE_ADDR
, CORE_ADDR
*, CORE_ADDR
*));
119 printf_command
PARAMS ((char *, int));
122 print_frame_nameless_args
PARAMS ((CORE_ADDR
, long, int, int, FILE *));
125 display_info
PARAMS ((char *, int));
128 do_one_display
PARAMS ((struct display
*));
131 undisplay_command
PARAMS ((char *, int));
134 free_display
PARAMS ((struct display
*));
137 display_command
PARAMS ((char *, int));
140 x_command
PARAMS ((char *, int));
143 address_info
PARAMS ((char *, int));
146 set_command
PARAMS ((char *, int));
149 output_command
PARAMS ((char *, int));
152 call_command
PARAMS ((char *, int));
155 inspect_command
PARAMS ((char *, int));
158 print_command
PARAMS ((char *, int));
161 print_command_1
PARAMS ((char *, int, int));
164 validate_format
PARAMS ((struct format_data
, char *));
167 do_examine
PARAMS ((struct format_data
, CORE_ADDR
));
170 print_formatted
PARAMS ((value
, int, int));
172 static struct format_data
173 decode_format
PARAMS ((char **, int, 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 (string_ptr
, oformat
, osize
)
192 struct format_data val
;
193 register char *p
= *string_ptr
;
199 if (*p
>= '0' && *p
<= '9')
200 val
.count
= atoi (p
);
201 while (*p
>= '0' && *p
<= '9') p
++;
203 /* Now process size or format letters that follow. */
207 if (*p
== 'b' || *p
== 'h' || *p
== 'w' || *p
== 'g')
216 else if (*p
>= 'a' && *p
<= 'z')
223 /* Make sure 'g' size is not used on integer types.
224 Well, actually, we can handle hex. */
225 if (val
.size
== 'g' && val
.format
!= 'f' && val
.format
!= 'x')
229 while (*p
== ' ' || *p
== '\t') p
++;
232 /* Set defaults for format and size if not specified. */
233 if (val
.format
== '?')
237 /* Neither has been specified. */
238 val
.format
= oformat
;
242 /* If a size is specified, any format makes a reasonable
243 default except 'i'. */
244 val
.format
= oformat
== 'i' ? 'x' : oformat
;
246 else if (val
.size
== '?')
251 /* Addresses must be words. */
252 val
.size
= osize
? 'w' : osize
;
255 /* Floating point has to be word or giantword. */
256 if (osize
== 'w' || osize
== 'g')
259 /* Default it to giantword if the last used size is not
261 val
.size
= osize
? 'g' : osize
;
264 /* Characters default to one byte. */
265 val
.size
= osize
? 'b' : osize
;
268 /* The default is the size most recently specified. */
275 /* Print value VAL on stdout according to FORMAT, a letter or 0.
276 Do not end with a newline.
277 0 means print VAL according to its own type.
278 SIZE is the letter for the size of datum being printed.
279 This is used to pad hex numbers so they line up. */
282 print_formatted (val
, format
, size
)
287 int len
= TYPE_LENGTH (VALUE_TYPE (val
));
289 if (VALUE_LVAL (val
) == lval_memory
)
290 next_address
= VALUE_ADDRESS (val
) + len
;
295 next_address
= VALUE_ADDRESS (val
)
296 + value_print (value_addr (val
), stdout
, format
, Val_pretty_default
);
300 wrap_here (""); /* Force output out, print_insn not using _filtered */
301 next_address
= VALUE_ADDRESS (val
)
302 + print_insn (VALUE_ADDRESS (val
), stdout
);
307 || TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_ARRAY
308 || TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_STRUCT
309 || TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_UNION
310 || VALUE_REPEATED (val
))
311 value_print (val
, stdout
, format
, Val_pretty_default
);
313 print_scalar_formatted (VALUE_CONTENTS (val
), VALUE_TYPE (val
),
314 format
, size
, stdout
);
318 /* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
319 according to letters FORMAT and SIZE on STREAM.
320 FORMAT may not be zero. Formats s and i are not supported at this level.
322 This is how the elements of an array or structure are printed
326 print_scalar_formatted (valaddr
, type
, format
, size
, stream
)
334 int len
= TYPE_LENGTH (type
);
336 if (size
== 'g' && sizeof (LONGEST
) < 8
339 /* ok, we're going to have to get fancy here. Assumption: a
340 long is four bytes. FIXME. */
341 unsigned long v1
, v2
;
343 v1
= unpack_long (builtin_type_long
, valaddr
);
344 v2
= unpack_long (builtin_type_long
, valaddr
+ 4);
346 #if TARGET_BYTE_ORDER == LITTLE_ENDIAN
347 /* Swap the two for printing */
360 fprintf_filtered (stream
, local_hex_format_custom("08x%08"), v1
, v2
);
363 error ("Output size \"g\" unimplemented for format \"%c\".",
369 val_long
= unpack_long (type
, valaddr
);
371 /* If value is unsigned, truncate it in case negative. */
374 if (len
== sizeof (char))
375 val_long
&= (1 << 8 * sizeof(char)) - 1;
376 else if (len
== sizeof (short))
377 val_long
&= (1 << 8 * sizeof(short)) - 1;
378 else if (len
== sizeof (long))
379 val_long
&= (unsigned long) - 1;
387 /* no size specified, like in print. Print varying # of digits. */
388 #if defined (LONG_LONG)
389 fprintf_filtered (stream
, local_hex_format_custom("ll"), val_long
);
390 #else /* not LONG_LONG. */
391 fprintf_filtered (stream
, local_hex_format_custom("l"), val_long
);
392 #endif /* not LONG_LONG. */
395 #if defined (LONG_LONG)
399 fprintf_filtered (stream
, local_hex_format_custom("02ll"), val_long
);
402 fprintf_filtered (stream
, local_hex_format_custom("04ll"), val_long
);
405 fprintf_filtered (stream
, local_hex_format_custom("08ll"), val_long
);
408 fprintf_filtered (stream
, local_hex_format_custom("016ll"), val_long
);
411 error ("Undefined output size \"%c\".", size
);
413 #else /* not LONG_LONG. */
417 fprintf_filtered (stream
, local_hex_format_custom("02"), val_long
);
420 fprintf_filtered (stream
, local_hex_format_custom("04"), val_long
);
423 fprintf_filtered (stream
, local_hex_format_custom("08"), val_long
);
426 fprintf_filtered (stream
, local_hex_format_custom("016"), val_long
);
429 error ("Undefined output size \"%c\".", size
);
431 #endif /* not LONG_LONG */
436 fprintf_filtered (stream
, local_decimal_format_custom("ll"), val_long
);
438 fprintf_filtered (stream
, local_decimal_format(), val_long
);
444 fprintf_filtered (stream
, "%llu", val_long
);
446 fprintf_filtered (stream
, "%u", val_long
);
453 fprintf_filtered (stream
, local_octal_format_custom("ll"), val_long
);
455 fprintf_filtered (stream
, local_octal_format(), val_long
);
458 fprintf_filtered (stream
, "0");
462 print_address (unpack_pointer (type
, valaddr
), stream
);
466 value_print (value_from_longest (builtin_type_char
, val_long
), stream
, 0,
471 if (len
== sizeof (float))
472 type
= builtin_type_float
;
473 else if (len
== sizeof (double))
474 type
= builtin_type_double
;
475 print_floating (valaddr
, type
, stream
);
482 /* Binary; 't' stands for "two". */
484 char bits
[8*(sizeof val_long
) + 1];
489 width
= 8*(sizeof val_long
);
506 error ("Undefined output size \"%c\".", size
);
512 bits
[width
] = (val_long
& 1) ? '1' : '0';
517 while (*cp
&& *cp
== '0')
522 fprintf_filtered (stream
, local_binary_format_prefix());
523 fprintf_filtered (stream
, cp
);
524 fprintf_filtered (stream
, local_binary_format_suffix());
529 error ("Undefined output format \"%c\".", format
);
533 /* Specify default address for `x' command.
534 `info lines' uses this. */
537 set_next_address (addr
)
542 /* Make address available to the user as $_. */
543 set_internalvar (lookup_internalvar ("_"),
544 value_from_longest (lookup_pointer_type (builtin_type_void
),
548 /* Optionally print address ADDR symbolically as <SYMBOL+OFFSET> on STREAM,
549 after LEADIN. Print nothing if no symbolic name is found nearby.
550 DO_DEMANGLE controls whether to print a symbol in its native "raw" form,
551 or to interpret it as a possible C++ name and convert it back to source
552 form. However note that DO_DEMANGLE can be overridden by the specific
553 settings of the demangle and asm_demangle variables. */
556 print_address_symbolic (addr
, stream
, do_demangle
, leadin
)
563 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (addr
);
565 /* If nothing comes out, don't print anything symbolic. */
570 fputs_filtered (leadin
, stream
);
571 fputs_filtered ("<", stream
);
573 fputs_filtered (SYMBOL_SOURCE_NAME (msymbol
), stream
);
575 fputs_filtered (SYMBOL_LINKAGE_NAME (msymbol
), stream
);
576 name_location
= SYMBOL_VALUE_ADDRESS (msymbol
);
577 if (addr
- name_location
)
578 fprintf_filtered (stream
, "+%d>", addr
- name_location
);
580 fputs_filtered (">", stream
);
583 /* Print address ADDR symbolically on STREAM.
584 First print it as a number. Then perhaps print
585 <SYMBOL + OFFSET> after the number. */
588 print_address (addr
, stream
)
592 #ifdef ADDR_BITS_REMOVE
593 fprintf_filtered (stream
, local_hex_format(), ADDR_BITS_REMOVE(addr
));
595 fprintf_filtered (stream
, local_hex_format(), addr
);
597 print_address_symbolic (addr
, stream
, asm_demangle
, " ");
600 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
601 controls whether to print the symbolic name "raw" or demangled.
602 Global setting "addressprint" controls whether to print hex address
606 print_address_demangle (addr
, stream
, do_demangle
)
612 fprintf_filtered (stream
, "0");
613 } else if (addressprint
) {
614 fprintf_filtered (stream
, local_hex_format(), addr
);
615 print_address_symbolic (addr
, stream
, do_demangle
, " ");
617 print_address_symbolic (addr
, stream
, do_demangle
, "");
622 /* Examine data at address ADDR in format FMT.
623 Fetch it from memory and print on stdout. */
626 do_examine (fmt
, addr
)
627 struct format_data fmt
;
630 register char format
= 0;
632 register int count
= 1;
633 struct type
*val_type
;
635 register int maxelts
;
642 /* String or instruction format implies fetch single bytes
643 regardless of the specified size. */
644 if (format
== 's' || format
== 'i')
648 val_type
= builtin_type_char
;
649 else if (size
== 'h')
650 val_type
= builtin_type_short
;
651 else if (size
== 'w')
652 val_type
= builtin_type_long
;
653 else if (size
== 'g')
655 val_type
= builtin_type_double
;
657 val_type
= builtin_type_long_long
;
665 if (format
== 's' || format
== 'i')
668 /* Print as many objects as specified in COUNT, at most maxelts per line,
669 with the address of the next one at the start of each line. */
673 print_address (next_address
, stdout
);
674 printf_filtered (":");
679 printf_filtered ("\t");
680 /* Note that print_formatted sets next_address for the next
682 last_examine_address
= next_address
;
683 last_examine_value
= value_at (val_type
, next_address
);
684 print_formatted (last_examine_value
, format
, size
);
686 printf_filtered ("\n");
692 validate_format (fmt
, cmdname
)
693 struct format_data fmt
;
697 error ("Size letters are meaningless in \"%s\" command.", cmdname
);
699 error ("Item count other than 1 is meaningless in \"%s\" command.",
701 if (fmt
.format
== 'i' || fmt
.format
== 's')
702 error ("Format letter \"%c\" is meaningless in \"%s\" command.",
703 fmt
.format
, cmdname
);
707 print_command_1 (exp
, inspect
, voidprint
)
712 struct expression
*expr
;
713 register struct cleanup
*old_chain
= 0;
714 register char format
= 0;
716 struct format_data fmt
;
719 /* Pass inspect flag to the rest of the print routines in a global (sigh). */
720 inspect_it
= inspect
;
722 if (exp
&& *exp
== '/')
725 fmt
= decode_format (&exp
, last_format
, 0);
726 validate_format (fmt
, "print");
727 last_format
= format
= fmt
.format
;
738 extern int objectprint
;
740 expr
= parse_expression (exp
);
741 old_chain
= make_cleanup (free_current_contents
, &expr
);
743 val
= evaluate_expression (expr
);
745 /* C++: figure out what type we actually want to print it as. */
746 type
= VALUE_TYPE (val
);
749 && ( TYPE_CODE (type
) == TYPE_CODE_PTR
750 || TYPE_CODE (type
) == TYPE_CODE_REF
)
751 && ( TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_STRUCT
752 || TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_UNION
))
756 v
= value_from_vtable_info (val
, TYPE_TARGET_TYPE (type
));
760 type
= VALUE_TYPE (val
);
765 val
= access_value_history (0);
767 if (voidprint
|| (val
&& VALUE_TYPE (val
) &&
768 TYPE_CODE (VALUE_TYPE (val
)) != TYPE_CODE_VOID
))
770 int histindex
= record_latest_value (val
);
773 printf ("\031(gdb-makebuffer \"%s\" %d '(\"", exp
, histindex
);
775 if (histindex
>= 0) printf_filtered ("$%d = ", histindex
);
777 print_formatted (val
, format
, fmt
.size
);
778 printf_filtered ("\n");
784 do_cleanups (old_chain
);
785 inspect_it
= 0; /* Reset print routines to normal */
790 print_command (exp
, from_tty
)
794 print_command_1 (exp
, 0, 1);
797 /* Same as print, except in epoch, it gets its own window */
800 inspect_command (exp
, from_tty
)
804 extern int epoch_interface
;
806 print_command_1 (exp
, epoch_interface
, 1);
809 /* Same as print, except it doesn't print void results. */
812 call_command (exp
, from_tty
)
816 print_command_1 (exp
, 0, 0);
821 output_command (exp
, from_tty
)
825 struct expression
*expr
;
826 register struct cleanup
*old_chain
;
827 register char format
= 0;
829 struct format_data fmt
;
831 if (exp
&& *exp
== '/')
834 fmt
= decode_format (&exp
, 0, 0);
835 validate_format (fmt
, "output");
839 expr
= parse_expression (exp
);
840 old_chain
= make_cleanup (free_current_contents
, &expr
);
842 val
= evaluate_expression (expr
);
844 print_formatted (val
, format
, fmt
.size
);
846 do_cleanups (old_chain
);
851 set_command (exp
, from_tty
)
855 struct expression
*expr
= parse_expression (exp
);
856 register struct cleanup
*old_chain
857 = make_cleanup (free_current_contents
, &expr
);
858 evaluate_expression (expr
);
859 do_cleanups (old_chain
);
864 address_info (exp
, from_tty
)
868 register struct symbol
*sym
;
869 register struct minimal_symbol
*msymbol
;
871 register long basereg
;
872 int is_a_field_of_this
; /* C++: lookup_symbol sets this to nonzero
873 if exp is a field of `this'. */
876 error ("Argument required.");
878 sym
= lookup_symbol (exp
, get_selected_block (), VAR_NAMESPACE
,
879 &is_a_field_of_this
, (struct symtab
**)NULL
);
882 if (is_a_field_of_this
)
884 printf ("Symbol \"%s\" is a field of the local class variable `this'\n", exp
);
888 msymbol
= lookup_minimal_symbol (exp
, (struct objfile
*) NULL
);
891 printf ("Symbol \"%s\" is at %s in a file compiled without debugging.\n",
892 exp
, local_hex_string(SYMBOL_VALUE_ADDRESS (msymbol
)));
894 error ("No symbol \"%s\" in current context.", exp
);
898 printf ("Symbol \"%s\" is ", SYMBOL_NAME (sym
));
899 val
= SYMBOL_VALUE (sym
);
900 basereg
= SYMBOL_BASEREG (sym
);
902 switch (SYMBOL_CLASS (sym
))
905 case LOC_CONST_BYTES
:
910 printf ("a label at address %s", local_hex_string(SYMBOL_VALUE_ADDRESS (sym
)));
914 printf ("a variable in register %s", reg_names
[val
]);
918 printf ("static storage at address %s", local_hex_string(SYMBOL_VALUE_ADDRESS (sym
)));
922 printf ("an argument in register %s", reg_names
[val
]);
926 if (SYMBOL_BASEREG_VALID (sym
))
928 printf ("an argument at offset %ld from register %s",
929 val
, reg_names
[basereg
]);
933 printf ("an argument at offset %ld", val
);
938 if (SYMBOL_BASEREG_VALID (sym
))
940 printf ("an argument at offset %ld from register %s",
941 val
, reg_names
[basereg
]);
945 printf ("an argument at frame offset %ld", val
);
950 if (SYMBOL_BASEREG_VALID (sym
))
952 printf ("a local variable at offset %ld from register %s",
953 val
, reg_names
[basereg
]);
957 printf ("a local variable at frame offset %ld", val
);
962 printf ("a reference argument at offset %ld", val
);
966 printf ("a typedef");
970 printf ("a function at address %s",
971 local_hex_string(BLOCK_START (SYMBOL_BLOCK_VALUE (sym
))));
975 printf ("of unknown (botched) type");
982 x_command (exp
, from_tty
)
986 struct expression
*expr
;
987 struct format_data fmt
;
988 struct cleanup
*old_chain
;
991 fmt
.format
= last_format
;
992 fmt
.size
= last_size
;
995 if (exp
&& *exp
== '/')
998 fmt
= decode_format (&exp
, last_format
, last_size
);
1001 /* If we have an expression, evaluate it and use it as the address. */
1003 if (exp
!= 0 && *exp
!= 0)
1005 expr
= parse_expression (exp
);
1006 /* Cause expression not to be there any more
1007 if this command is repeated with Newline.
1008 But don't clobber a user-defined command's definition. */
1011 old_chain
= make_cleanup (free_current_contents
, &expr
);
1012 val
= evaluate_expression (expr
);
1013 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_REF
)
1014 val
= value_ind (val
);
1015 /* In rvalue contexts, such as this, functions are coerced into
1016 pointers to functions. This makes "x/i main" work. */
1017 if (/* last_format == 'i'
1018 && */ TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_FUNC
1019 && VALUE_LVAL (val
) == lval_memory
)
1020 next_address
= VALUE_ADDRESS (val
);
1022 next_address
= value_as_pointer (val
);
1023 do_cleanups (old_chain
);
1026 do_examine (fmt
, next_address
);
1028 /* If the examine succeeds, we remember its size and format for next time. */
1029 last_size
= fmt
.size
;
1030 last_format
= fmt
.format
;
1032 /* Set a couple of internal variables if appropriate. */
1033 if (last_examine_value
)
1035 /* Make last address examined available to the user as $_. Use
1036 the correct pointer type. */
1037 set_internalvar (lookup_internalvar ("_"),
1038 value_from_longest (
1039 lookup_pointer_type (VALUE_TYPE (last_examine_value
)),
1040 (LONGEST
) last_examine_address
));
1042 /* Make contents of last address examined available to the user as $__.*/
1043 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1048 /* Add an expression to the auto-display chain.
1049 Specify the expression. */
1052 display_command (exp
, from_tty
)
1056 struct format_data fmt
;
1057 register struct expression
*expr
;
1058 register struct display
*new;
1069 fmt
= decode_format (&exp
, 0, 0);
1070 if (fmt
.size
&& fmt
.format
== 0)
1072 if (fmt
.format
== 'i' || fmt
.format
== 's')
1082 innermost_block
= 0;
1083 expr
= parse_expression (exp
);
1085 new = (struct display
*) xmalloc (sizeof (struct display
));
1088 new->block
= innermost_block
;
1089 new->next
= display_chain
;
1090 new->number
= ++display_number
;
1092 new->status
= enabled
;
1093 display_chain
= new;
1095 if (from_tty
&& target_has_execution
)
1096 do_one_display (new);
1109 /* Clear out the display_chain.
1110 Done when new symtabs are loaded, since this invalidates
1111 the types stored in many expressions. */
1116 register struct display
*d
;
1118 while ((d
= display_chain
) != NULL
)
1121 display_chain
= d
->next
;
1126 /* Delete the auto-display number NUM. */
1129 delete_display (num
)
1132 register struct display
*d1
, *d
;
1135 error ("No display number %d.", num
);
1137 if (display_chain
->number
== num
)
1140 display_chain
= d1
->next
;
1144 for (d
= display_chain
; ; d
= d
->next
)
1147 error ("No display number %d.", num
);
1148 if (d
->next
->number
== num
)
1158 /* Delete some values from the auto-display chain.
1159 Specify the element numbers. */
1162 undisplay_command (args
, from_tty
)
1166 register char *p
= args
;
1172 if (query ("Delete all auto-display expressions? "))
1181 while (*p1
>= '0' && *p1
<= '9') p1
++;
1182 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1183 error ("Arguments must be display numbers.");
1187 delete_display (num
);
1190 while (*p
== ' ' || *p
== '\t') p
++;
1195 /* Display a single auto-display.
1196 Do nothing if the display cannot be printed in the current context,
1197 or if the display is disabled. */
1203 int within_current_scope
;
1205 if (d
->status
== disabled
)
1209 within_current_scope
= contained_in (get_selected_block (), d
->block
);
1211 within_current_scope
= 1;
1212 if (!within_current_scope
)
1215 current_display_number
= d
->number
;
1217 printf_filtered ("%d: ", d
->number
);
1222 printf_filtered ("x/");
1223 if (d
->format
.count
!= 1)
1224 printf_filtered ("%d", d
->format
.count
);
1225 printf_filtered ("%c", d
->format
.format
);
1226 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1227 printf_filtered ("%c", d
->format
.size
);
1228 printf_filtered (" ");
1229 print_expression (d
->exp
, stdout
);
1230 if (d
->format
.count
!= 1)
1231 printf_filtered ("\n");
1233 printf_filtered (" ");
1235 addr
= value_as_pointer (evaluate_expression (d
->exp
));
1236 if (d
->format
.format
== 'i')
1237 addr
= ADDR_BITS_REMOVE (addr
);
1239 do_examine (d
->format
, addr
);
1243 if (d
->format
.format
)
1244 printf_filtered ("/%c ", d
->format
.format
);
1245 print_expression (d
->exp
, stdout
);
1246 printf_filtered (" = ");
1247 print_formatted (evaluate_expression (d
->exp
),
1248 d
->format
.format
, d
->format
.size
);
1249 printf_filtered ("\n");
1253 current_display_number
= -1;
1256 /* Display all of the values on the auto-display chain which can be
1257 evaluated in the current scope. */
1262 register struct display
*d
;
1264 for (d
= display_chain
; d
; d
= d
->next
)
1268 /* Delete the auto-display which we were in the process of displaying.
1269 This is done when there is an error or a signal. */
1272 disable_display (num
)
1275 register struct display
*d
;
1277 for (d
= display_chain
; d
; d
= d
->next
)
1278 if (d
->number
== num
)
1280 d
->status
= disabled
;
1283 printf ("No display number %d.\n", num
);
1287 disable_current_display ()
1289 if (current_display_number
>= 0)
1291 disable_display (current_display_number
);
1292 fprintf (stderr
, "Disabling display %d to avoid infinite recursion.\n",
1293 current_display_number
);
1295 current_display_number
= -1;
1299 display_info (ignore
, from_tty
)
1303 register struct display
*d
;
1306 printf ("There are no auto-display expressions now.\n");
1308 printf_filtered ("Auto-display expressions now in effect:\n\
1309 Num Enb Expression\n");
1311 for (d
= display_chain
; d
; d
= d
->next
)
1313 printf_filtered ("%d: %c ", d
->number
, "ny"[(int)d
->status
]);
1315 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1317 else if (d
->format
.format
)
1318 printf_filtered ("/%c ", d
->format
.format
);
1319 print_expression (d
->exp
, stdout
);
1320 if (d
->block
&& !contained_in (get_selected_block (), d
->block
))
1321 printf_filtered (" (cannot be evaluated in the current context)");
1322 printf_filtered ("\n");
1328 enable_display (args
, from_tty
)
1332 register char *p
= args
;
1335 register struct display
*d
;
1339 for (d
= display_chain
; d
; d
= d
->next
)
1340 d
->status
= enabled
;
1346 while (*p1
>= '0' && *p1
<= '9')
1348 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1349 error ("Arguments must be display numbers.");
1353 for (d
= display_chain
; d
; d
= d
->next
)
1354 if (d
->number
== num
)
1356 d
->status
= enabled
;
1359 printf ("No display number %d.\n", num
);
1362 while (*p
== ' ' || *p
== '\t')
1369 disable_display_command (args
, from_tty
)
1373 register char *p
= args
;
1375 register struct display
*d
;
1379 for (d
= display_chain
; d
; d
= d
->next
)
1380 d
->status
= disabled
;
1386 while (*p1
>= '0' && *p1
<= '9')
1388 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1389 error ("Arguments must be display numbers.");
1391 disable_display (atoi (p
));
1394 while (*p
== ' ' || *p
== '\t')
1400 /* Print the value in stack frame FRAME of a variable
1401 specified by a struct symbol. */
1404 print_variable_value (var
, frame
, stream
)
1409 value val
= read_var_value (var
, frame
);
1410 value_print (val
, stream
, 0, Val_pretty_default
);
1413 /* Print the arguments of a stack frame, given the function FUNC
1414 running in that frame (as a symbol), the info on the frame,
1415 and the number of args according to the stack frame (or -1 if unknown). */
1417 /* References here and elsewhere to "number of args according to the
1418 stack frame" appear in all cases to refer to "number of ints of args
1419 according to the stack frame". At least for VAX, i386, isi. */
1422 print_frame_args (func
, fi
, num
, stream
)
1423 struct symbol
*func
;
1424 struct frame_info
*fi
;
1432 register struct symbol
*sym
;
1434 /* Offset of next stack argument beyond the one we have seen that is
1435 at the highest offset.
1436 -1 if we haven't come to a stack argument yet. */
1437 long highest_offset
= -1;
1439 /* Number of ints of arguments that we have printed so far. */
1440 int args_printed
= 0;
1444 b
= SYMBOL_BLOCK_VALUE (func
);
1445 nsyms
= BLOCK_NSYMS (b
);
1448 for (i
= 0; i
< nsyms
; i
++)
1451 sym
= BLOCK_SYM (b
, i
);
1453 /* Keep track of the highest stack argument offset seen, and
1454 skip over any kinds of symbols we don't care about. */
1456 switch (SYMBOL_CLASS (sym
)) {
1460 long current_offset
= SYMBOL_VALUE (sym
);
1462 arg_size
= TYPE_LENGTH (SYMBOL_TYPE (sym
));
1464 /* Compute address of next argument by adding the size of
1465 this argument and rounding to an int boundary. */
1467 = ((current_offset
+ arg_size
+ sizeof (int) - 1)
1468 & ~(sizeof (int) - 1));
1470 /* If this is the highest offset seen yet, set highest_offset. */
1471 if (highest_offset
== -1
1472 || (current_offset
> highest_offset
))
1473 highest_offset
= current_offset
;
1475 /* Add the number of ints we're about to print to args_printed. */
1476 args_printed
+= (arg_size
+ sizeof (int) - 1) / sizeof (int);
1479 /* We care about types of symbols, but don't need to keep track of
1480 stack offsets in them. */
1485 /* Other types of symbols we just skip over. */
1490 /* If the symbol name is non-null,
1491 we have to re-look-up the symbol because arguments often have
1492 two entries (one a parameter, one a register or local), and the one
1493 we want is the non-parm, which lookup_symbol will find for
1494 us. After this, sym could be any SYMBOL_CLASS...
1496 Null parameter names occur on the RS/6000, for traceback tables.
1497 FIXME, should we even print them? */
1499 if (*SYMBOL_NAME (sym
))
1500 sym
= lookup_symbol (SYMBOL_NAME (sym
),
1501 b
, VAR_NAMESPACE
, (int *)NULL
, (struct symtab
**)NULL
);
1503 /* Print the current arg. */
1505 fprintf_filtered (stream
, ", ");
1507 fprint_symbol (stream
, SYMBOL_SOURCE_NAME (sym
));
1508 fputs_filtered ("=", stream
);
1510 /* Avoid value_print because it will deref ref parameters. We just
1511 want to print their addresses. Print ??? for args whose address
1512 we do not know. We pass 2 as "recurse" to val_print because our
1513 standard indentation here is 4 spaces, and val_print indents
1514 2 for each recurse. */
1515 val
= read_var_value (sym
, FRAME_INFO_ID (fi
));
1517 val_print (VALUE_TYPE (val
), VALUE_CONTENTS (val
), VALUE_ADDRESS (val
),
1518 stream
, 0, 0, 2, Val_no_prettyprint
);
1520 fputs_filtered ("???", stream
);
1524 /* Don't print nameless args in situations where we don't know
1525 enough about the stack to find them. */
1531 if (highest_offset
== -1)
1532 start
= FRAME_ARGS_SKIP
;
1534 start
= highest_offset
;
1536 addr
= FRAME_ARGS_ADDRESS (fi
);
1538 print_frame_nameless_args (addr
, start
, num
- args_printed
,
1543 /* Print nameless args on STREAM.
1544 ARGSADDR is the address of the arglist, START is the offset
1545 of the first nameless arg, and NUM is the number of nameless args to
1546 print. FIRST is nonzero if this is the first argument (not just
1547 the first nameless arg). */
1549 print_frame_nameless_args (argsaddr
, start
, num
, first
, stream
)
1557 for (i
= 0; i
< num
; i
++)
1561 fprintf_filtered (stream
, ", ");
1562 #ifndef PRINT_TYPELESS_INTEGER
1563 fprintf_filtered (stream
, "%d",
1564 read_memory_integer (argsaddr
+ start
, sizeof (int)));
1566 PRINT_TYPELESS_INTEGER (stream
, builtin_type_int
,
1568 read_memory_integer (argsaddr
+ start
,
1572 start
+= sizeof (int);
1578 printf_command (arg
, from_tty
)
1583 register char *s
= arg
;
1587 int allocated_args
= 20;
1590 val_args
= (value
*) xmalloc (allocated_args
* sizeof (value
));
1593 error_no_arg ("format-control string and values to print");
1595 /* Skip white space before format string */
1596 while (*s
== ' ' || *s
== '\t') s
++;
1598 /* A format string should follow, enveloped in double quotes */
1600 error ("Bad format string, missing '\"'.");
1602 /* Parse the format-control string and copy it into the string STRING,
1603 processing some kinds of escape sequence. */
1605 f
= string
= (char *) alloca (strlen (s
) + 1);
1612 error ("Bad format string, non-terminated '\"'.");
1613 /* doesn't return */
1634 /* ??? TODO: handle other escape sequences */
1635 error ("Unrecognized \\ escape character in format string.");
1644 /* Skip over " and following space and comma. */
1647 while (*s
== ' ' || *s
== '\t') s
++;
1649 if (*s
!= ',' && *s
!= 0)
1650 error ("Invalid argument syntax");
1653 while (*s
== ' ' || *s
== '\t') s
++;
1656 /* Now scan the string for %-specs and see what kinds of args they want.
1657 argclass[I] classifies the %-specs so we can give vprintf something
1658 of the right size. */
1660 enum argclass
{int_arg
, string_arg
, double_arg
, long_long_arg
};
1661 enum argclass
*argclass
;
1667 argclass
= (enum argclass
*) alloca (strlen (s
) * sizeof *argclass
);
1674 while (strchr ("0123456789.hlL-+ #", *f
))
1676 if (*f
== 'l' || *f
== 'L')
1681 argclass
[nargs_wanted
++] = string_arg
;
1682 else if (*f
== 'e' || *f
== 'f' || *f
== 'g')
1683 argclass
[nargs_wanted
++] = double_arg
;
1684 else if (lcount
> 1)
1685 argclass
[nargs_wanted
++] = long_long_arg
;
1687 argclass
[nargs_wanted
++] = int_arg
;
1691 /* Now, parse all arguments and evaluate them.
1692 Store the VALUEs in VAL_ARGS. */
1697 if (nargs
== allocated_args
)
1698 val_args
= (value
*) xrealloc ((char *) val_args
,
1699 (allocated_args
*= 2)
1702 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
1704 /* If format string wants a float, unchecked-convert the value to
1705 floating point of the same size */
1707 if (argclass
[nargs
] == double_arg
)
1709 if (TYPE_LENGTH (VALUE_TYPE (val_args
[nargs
])) == sizeof (float))
1710 VALUE_TYPE (val_args
[nargs
]) = builtin_type_float
;
1711 if (TYPE_LENGTH (VALUE_TYPE (val_args
[nargs
])) == sizeof (double))
1712 VALUE_TYPE (val_args
[nargs
]) = builtin_type_double
;
1720 if (nargs
!= nargs_wanted
)
1721 error ("Wrong number of arguments for specified format-string");
1723 /* Now lay out an argument-list containing the arguments
1724 as doubles, integers and C pointers. */
1726 arg_bytes
= (char *) alloca (sizeof (double) * nargs
);
1728 for (i
= 0; i
< nargs
; i
++)
1730 if (argclass
[i
] == string_arg
)
1735 tem
= value_as_pointer (val_args
[i
]);
1737 /* This is a %s argument. Find the length of the string. */
1742 read_memory (tem
+ j
, &c
, 1);
1747 /* Copy the string contents into a string inside GDB. */
1748 str
= (char *) alloca (j
+ 1);
1749 read_memory (tem
, str
, j
);
1752 /* Pass address of internal copy as the arg to vprintf. */
1753 *((int *) &arg_bytes
[argindex
]) = (int) str
;
1754 argindex
+= sizeof (int);
1756 else if (VALUE_TYPE (val_args
[i
])->code
== TYPE_CODE_FLT
)
1758 *((double *) &arg_bytes
[argindex
]) = value_as_double (val_args
[i
]);
1759 argindex
+= sizeof (double);
1763 if (argclass
[i
] == long_long_arg
)
1765 *(long long *) &arg_bytes
[argindex
] = value_as_long (val_args
[i
]);
1766 argindex
+= sizeof (long long);
1771 *((long *) &arg_bytes
[argindex
]) = value_as_long (val_args
[i
]);
1772 argindex
+= sizeof (long);
1777 /* There is not a standard way to make a va_list, so we need
1778 to do various things for different systems. */
1779 #if defined (__INT_VARARGS_H)
1784 list
.__va_stk
= (int *) arg_bytes
;
1785 list
.__va_reg
= (int *) arg_bytes
;
1786 vprintf (string
, list
);
1788 #else /* No __INT_VARARGS_H. */
1789 vprintf (string
, arg_bytes
);
1790 #endif /* No __INT_VARARGS_H. */
1793 /* Helper function for asdump_command. Finds the bounds of a function
1794 for a specified section of text. PC is an address within the
1795 function which you want bounds for; *LOW and *HIGH are set to the
1796 beginning (inclusive) and end (exclusive) of the function. This
1797 function returns 1 on success and 0 on failure. */
1800 containing_function_bounds (pc
, low
, high
)
1801 CORE_ADDR pc
, *low
, *high
;
1805 if (!find_pc_partial_function (pc
, 0, low
))
1811 if (!find_pc_partial_function (scan
, 0, high
))
1813 } while (*low
== *high
);
1818 /* Dump a specified section of assembly code. With no command line
1819 arguments, this command will dump the assembly code for the
1820 function surrounding the pc value in the selected frame. With one
1821 argument, it will dump the assembly code surrounding that pc value.
1822 Two arguments are interpeted as bounds within which to dump
1827 disassemble_command (arg
, from_tty
)
1831 CORE_ADDR low
, high
;
1837 if (!selected_frame
)
1838 error ("No frame selected.\n");
1840 pc
= get_frame_pc (selected_frame
);
1841 if (!containing_function_bounds (pc
, &low
, &high
))
1842 error ("No function contains pc specified by selected frame.\n");
1844 else if (!(space_index
= (char *) strchr (arg
, ' ')))
1847 pc
= parse_and_eval_address (arg
);
1848 if (!containing_function_bounds (pc
, &low
, &high
))
1849 error ("No function contains specified pc.\n");
1853 /* Two arguments. */
1854 *space_index
= '\0';
1855 low
= parse_and_eval_address (arg
);
1856 high
= parse_and_eval_address (space_index
+ 1);
1859 printf_filtered ("Dump of assembler code ");
1863 find_pc_partial_function (pc
, &name
, 0);
1864 printf_filtered ("for function %s:\n", name
);
1867 printf_filtered ("from %s ", local_hex_string(low
));
1868 printf_filtered ("to %s:\n", local_hex_string(high
));
1870 /* Dump the specified range. */
1871 for (pc
= low
; pc
< high
; )
1874 print_address (pc
, stdout
);
1875 printf_filtered (":\t");
1876 pc
+= print_insn (pc
, stdout
);
1877 printf_filtered ("\n");
1879 printf_filtered ("End of assembler dump.\n");
1885 _initialize_printcmd ()
1887 current_display_number
= -1;
1889 add_info ("address", address_info
,
1890 "Describe where variable VAR is stored.");
1892 add_com ("x", class_vars
, x_command
,
1893 "Examine memory: x/FMT ADDRESS.\n\
1894 ADDRESS is an expression for the memory address to examine.\n\
1895 FMT is a repeat count followed by a format letter and a size letter.\n\
1896 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
1897 f(float), a(address), i(instruction), c(char) and s(string).\n\
1898 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
1899 g is meaningful only with f, for type double.\n\
1900 The specified number of objects of the specified size are printed\n\
1901 according to the format.\n\n\
1902 Defaults for format and size letters are those previously used.\n\
1903 Default count is 1. Default address is following last thing printed\n\
1904 with this command or \"print\".");
1906 add_com ("disassemble", class_vars
, disassemble_command
,
1907 "Disassemble a specified section of memory.\n\
1908 Default is the function surrounding the pc of the selected frame.\n\
1909 With a single argument, the function surrounding that address is dumped.\n\
1910 Two arguments are taken as a range of memory to dump.");
1913 add_com ("whereis", class_vars
, whereis_command
,
1914 "Print line number and file of definition of variable.");
1917 add_info ("display", display_info
,
1918 "Expressions to display when program stops, with code numbers.");
1920 add_cmd ("undisplay", class_vars
, undisplay_command
,
1921 "Cancel some expressions to be displayed when program stops.\n\
1922 Arguments are the code numbers of the expressions to stop displaying.\n\
1923 No argument means cancel all automatic-display expressions.\n\
1924 \"delete display\" has the same effect as this command.\n\
1925 Do \"info display\" to see current list of code numbers.",
1928 add_com ("display", class_vars
, display_command
,
1929 "Print value of expression EXP each time the program stops.\n\
1930 /FMT may be used before EXP as in the \"print\" command.\n\
1931 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
1932 as in the \"x\" command, and then EXP is used to get the address to examine\n\
1933 and examining is done as in the \"x\" command.\n\n\
1934 With no argument, display all currently requested auto-display expressions.\n\
1935 Use \"undisplay\" to cancel display requests previously made.");
1937 add_cmd ("display", class_vars
, enable_display
,
1938 "Enable some expressions to be displayed when program stops.\n\
1939 Arguments are the code numbers of the expressions to resume displaying.\n\
1940 No argument means enable all automatic-display expressions.\n\
1941 Do \"info display\" to see current list of code numbers.", &enablelist
);
1943 add_cmd ("display", class_vars
, disable_display_command
,
1944 "Disable some expressions to be displayed when program stops.\n\
1945 Arguments are the code numbers of the expressions to stop displaying.\n\
1946 No argument means disable all automatic-display expressions.\n\
1947 Do \"info display\" to see current list of code numbers.", &disablelist
);
1949 add_cmd ("display", class_vars
, undisplay_command
,
1950 "Cancel some expressions to be displayed when program stops.\n\
1951 Arguments are the code numbers of the expressions to stop displaying.\n\
1952 No argument means cancel all automatic-display expressions.\n\
1953 Do \"info display\" to see current list of code numbers.", &deletelist
);
1955 add_com ("printf", class_vars
, printf_command
,
1956 "printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
1957 This is useful for formatted output in user-defined commands.");
1958 add_com ("output", class_vars
, output_command
,
1959 "Like \"print\" but don't put in value history and don't print newline.\n\
1960 This is useful in user-defined commands.");
1962 add_prefix_cmd ("set", class_vars
, set_command
,
1963 "Perform an assignment VAR = EXP.\n\
1964 You must type the \"=\". VAR may be a debugger \"convenience\" variable\n\
1965 (names starting with $), a register (a few standard names starting with $),\n\
1966 or an actual variable in the program being debugged. EXP is any expression.\n\
1967 Use \"set variable\" for variables with names identical to set subcommands.\n\
1968 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
1969 You can see these environment settings with the \"show\" command.",
1970 &setlist
, "set ", 1, &cmdlist
);
1972 /* "call" is the same as "set", but handy for dbx users to call fns. */
1973 add_com ("call", class_vars
, call_command
,
1974 "Call a function in the inferior process.\n\
1975 The argument is the function name and arguments, in the notation of the\n\
1976 current working language. The result is printed and saved in the value\n\
1977 history, if it is not void.");
1979 add_cmd ("variable", class_vars
, set_command
,
1980 "Perform an assignment VAR = EXP.\n\
1981 You must type the \"=\". VAR may be a debugger \"convenience\" variable\n\
1982 (names starting with $), a register (a few standard names starting with $),\n\
1983 or an actual variable in the program being debugged. EXP is any expression.\n\
1984 This may usually be abbreviated to simply \"set\".",
1987 add_com ("print", class_vars
, print_command
,
1988 concat ("Print value of expression EXP.\n\
1989 Variables accessible are those of the lexical environment of the selected\n\
1990 stack frame, plus all those whose scope is global or an entire file.\n\
1992 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
1993 $$NUM refers to NUM'th value back from the last one.\n\
1994 Names starting with $ refer to registers (with the values they would have\n\
1995 if the program were to return to the stack frame now selected, restoring\n\
1996 all registers saved by frames farther in) or else to debugger\n\
1997 \"convenience\" variables (any such name not a known register).\n\
1998 Use assignment expressions to give values to convenience variables.\n",
2000 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2001 @ is a binary operator for treating consecutive data objects\n\
2002 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2003 element is FOO, whose second element is stored in the space following\n\
2004 where FOO is stored, etc. FOO must be an expression whose value\n\
2005 resides in memory.\n",
2007 EXP may be preceded with /FMT, where FMT is a format letter\n\
2008 but no count or size letter (see \"x\" command).", NULL
));
2009 add_com_alias ("p", "print", class_vars
, 1);
2011 add_com ("inspect", class_vars
, inspect_command
,
2012 "Same as \"print\" command, except that if you are running in the epoch\n\
2013 environment, the value is printed in its own window.");