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
555 print_address_symbolic (addr
, stream
, do_demangle
, leadin
)
562 register struct minimal_symbol
*msymbol
= lookup_minimal_symbol_by_pc (addr
);
564 /* If nothing comes out, don't print anything symbolic. */
569 fputs_filtered (leadin
, stream
);
570 fputs_filtered ("<", stream
);
572 fputs_demangled (msymbol
-> name
, stream
, DMGL_ANSI
| DMGL_PARAMS
);
574 fputs_filtered (msymbol
-> name
, stream
);
575 name_location
= msymbol
-> address
;
576 if (addr
- name_location
)
577 fprintf_filtered (stream
, "+%d>", addr
- name_location
);
579 fputs_filtered (">", stream
);
582 /* Print address ADDR symbolically on STREAM.
583 First print it as a number. Then perhaps print
584 <SYMBOL + OFFSET> after the number. */
587 print_address (addr
, stream
)
591 #ifdef ADDR_BITS_REMOVE
592 fprintf_filtered (stream
, local_hex_format(), ADDR_BITS_REMOVE(addr
));
594 fprintf_filtered (stream
, local_hex_format(), addr
);
596 print_address_symbolic (addr
, stream
, asm_demangle
, " ");
599 /* Print address ADDR symbolically on STREAM. Parameter DEMANGLE
600 controls whether to print the symbolic name "raw" or demangled.
601 Global setting "addressprint" controls whether to print hex address
605 print_address_demangle (addr
, stream
, do_demangle
)
611 fprintf_filtered (stream
, "0");
612 } else if (addressprint
) {
613 fprintf_filtered (stream
, local_hex_format(), addr
);
614 print_address_symbolic (addr
, stream
, do_demangle
, " ");
616 print_address_symbolic (addr
, stream
, do_demangle
, "");
621 /* Examine data at address ADDR in format FMT.
622 Fetch it from memory and print on stdout. */
625 do_examine (fmt
, addr
)
626 struct format_data fmt
;
629 register char format
= 0;
631 register int count
= 1;
632 struct type
*val_type
;
634 register int maxelts
;
641 /* String or instruction format implies fetch single bytes
642 regardless of the specified size. */
643 if (format
== 's' || format
== 'i')
647 val_type
= builtin_type_char
;
648 else if (size
== 'h')
649 val_type
= builtin_type_short
;
650 else if (size
== 'w')
651 val_type
= builtin_type_long
;
652 else if (size
== 'g')
654 val_type
= builtin_type_double
;
656 val_type
= builtin_type_long_long
;
664 if (format
== 's' || format
== 'i')
667 /* Print as many objects as specified in COUNT, at most maxelts per line,
668 with the address of the next one at the start of each line. */
672 print_address (next_address
, stdout
);
673 printf_filtered (":");
678 printf_filtered ("\t");
679 /* Note that print_formatted sets next_address for the next
681 last_examine_address
= next_address
;
682 last_examine_value
= value_at (val_type
, next_address
);
683 print_formatted (last_examine_value
, format
, size
);
685 printf_filtered ("\n");
691 validate_format (fmt
, cmdname
)
692 struct format_data fmt
;
696 error ("Size letters are meaningless in \"%s\" command.", cmdname
);
698 error ("Item count other than 1 is meaningless in \"%s\" command.",
700 if (fmt
.format
== 'i' || fmt
.format
== 's')
701 error ("Format letter \"%c\" is meaningless in \"%s\" command.",
702 fmt
.format
, cmdname
);
706 print_command_1 (exp
, inspect
, voidprint
)
711 struct expression
*expr
;
712 register struct cleanup
*old_chain
= 0;
713 register char format
= 0;
715 struct format_data fmt
;
718 /* Pass inspect flag to the rest of the print routines in a global (sigh). */
719 inspect_it
= inspect
;
721 if (exp
&& *exp
== '/')
724 fmt
= decode_format (&exp
, last_format
, 0);
725 validate_format (fmt
, "print");
726 last_format
= format
= fmt
.format
;
737 extern int objectprint
;
739 expr
= parse_expression (exp
);
740 old_chain
= make_cleanup (free_current_contents
, &expr
);
742 val
= evaluate_expression (expr
);
744 /* C++: figure out what type we actually want to print it as. */
745 type
= VALUE_TYPE (val
);
748 && ( TYPE_CODE (type
) == TYPE_CODE_PTR
749 || TYPE_CODE (type
) == TYPE_CODE_REF
)
750 && ( TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_STRUCT
751 || TYPE_CODE (TYPE_TARGET_TYPE (type
)) == TYPE_CODE_UNION
))
755 v
= value_from_vtable_info (val
, TYPE_TARGET_TYPE (type
));
759 type
= VALUE_TYPE (val
);
764 val
= access_value_history (0);
766 if (voidprint
|| (val
&& VALUE_TYPE (val
) &&
767 TYPE_CODE (VALUE_TYPE (val
)) != TYPE_CODE_VOID
))
769 int histindex
= record_latest_value (val
);
772 printf ("\031(gdb-makebuffer \"%s\" %d '(\"", exp
, histindex
);
774 if (histindex
>= 0) printf_filtered ("$%d = ", histindex
);
776 print_formatted (val
, format
, fmt
.size
);
777 printf_filtered ("\n");
783 do_cleanups (old_chain
);
784 inspect_it
= 0; /* Reset print routines to normal */
789 print_command (exp
, from_tty
)
793 print_command_1 (exp
, 0, 1);
796 /* Same as print, except in epoch, it gets its own window */
799 inspect_command (exp
, from_tty
)
803 extern int epoch_interface
;
805 print_command_1 (exp
, epoch_interface
, 1);
808 /* Same as print, except it doesn't print void results. */
811 call_command (exp
, from_tty
)
815 print_command_1 (exp
, 0, 0);
820 output_command (exp
, from_tty
)
824 struct expression
*expr
;
825 register struct cleanup
*old_chain
;
826 register char format
= 0;
828 struct format_data fmt
;
830 if (exp
&& *exp
== '/')
833 fmt
= decode_format (&exp
, 0, 0);
834 validate_format (fmt
, "output");
838 expr
= parse_expression (exp
);
839 old_chain
= make_cleanup (free_current_contents
, &expr
);
841 val
= evaluate_expression (expr
);
843 print_formatted (val
, format
, fmt
.size
);
845 do_cleanups (old_chain
);
850 set_command (exp
, from_tty
)
854 struct expression
*expr
= parse_expression (exp
);
855 register struct cleanup
*old_chain
856 = make_cleanup (free_current_contents
, &expr
);
857 evaluate_expression (expr
);
858 do_cleanups (old_chain
);
863 address_info (exp
, from_tty
)
867 register struct symbol
*sym
;
868 register struct minimal_symbol
*msymbol
;
870 register long basereg
;
871 int is_a_field_of_this
; /* C++: lookup_symbol sets this to nonzero
872 if exp is a field of `this'. */
875 error ("Argument required.");
877 sym
= lookup_symbol (exp
, get_selected_block (), VAR_NAMESPACE
,
878 &is_a_field_of_this
, (struct symtab
**)NULL
);
881 if (is_a_field_of_this
)
883 printf ("Symbol \"%s\" is a field of the local class variable `this'\n", exp
);
887 msymbol
= lookup_minimal_symbol (exp
, (struct objfile
*) NULL
);
890 printf ("Symbol \"%s\" is at %s in a file compiled without debugging.\n",
891 exp
, local_hex_string(msymbol
-> address
));
893 error ("No symbol \"%s\" in current context.", exp
);
897 printf ("Symbol \"%s\" is ", SYMBOL_NAME (sym
));
898 val
= SYMBOL_VALUE (sym
);
899 basereg
= SYMBOL_BASEREG (sym
);
901 switch (SYMBOL_CLASS (sym
))
904 case LOC_CONST_BYTES
:
909 printf ("a label at address %s", local_hex_string(SYMBOL_VALUE_ADDRESS (sym
)));
913 printf ("a variable in register %s", reg_names
[val
]);
917 printf ("static storage at address %s", local_hex_string(SYMBOL_VALUE_ADDRESS (sym
)));
921 printf ("an argument in register %s", reg_names
[val
]);
925 if (SYMBOL_BASEREG_VALID (sym
))
927 printf ("an argument at offset %ld from register %s",
928 val
, reg_names
[basereg
]);
932 printf ("an argument at offset %ld", val
);
937 if (SYMBOL_BASEREG_VALID (sym
))
939 printf ("an argument at offset %ld from register %s",
940 val
, reg_names
[basereg
]);
944 printf ("an argument at frame offset %ld", val
);
949 if (SYMBOL_BASEREG_VALID (sym
))
951 printf ("a local variable at offset %ld from register %s",
952 val
, reg_names
[basereg
]);
956 printf ("a local variable at frame offset %ld", val
);
961 printf ("a reference argument at offset %ld", val
);
965 printf ("a typedef");
969 printf ("a function at address %s",
970 local_hex_string(BLOCK_START (SYMBOL_BLOCK_VALUE (sym
))));
974 printf ("of unknown (botched) type");
981 x_command (exp
, from_tty
)
985 struct expression
*expr
;
986 struct format_data fmt
;
987 struct cleanup
*old_chain
;
990 fmt
.format
= last_format
;
991 fmt
.size
= last_size
;
994 if (exp
&& *exp
== '/')
997 fmt
= decode_format (&exp
, last_format
, last_size
);
1000 /* If we have an expression, evaluate it and use it as the address. */
1002 if (exp
!= 0 && *exp
!= 0)
1004 expr
= parse_expression (exp
);
1005 /* Cause expression not to be there any more
1006 if this command is repeated with Newline.
1007 But don't clobber a user-defined command's definition. */
1010 old_chain
= make_cleanup (free_current_contents
, &expr
);
1011 val
= evaluate_expression (expr
);
1012 if (TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_REF
)
1013 val
= value_ind (val
);
1014 /* In rvalue contexts, such as this, functions are coerced into
1015 pointers to functions. This makes "x/i main" work. */
1016 if (/* last_format == 'i'
1017 && */ TYPE_CODE (VALUE_TYPE (val
)) == TYPE_CODE_FUNC
1018 && VALUE_LVAL (val
) == lval_memory
)
1019 next_address
= VALUE_ADDRESS (val
);
1021 next_address
= value_as_pointer (val
);
1022 do_cleanups (old_chain
);
1025 do_examine (fmt
, next_address
);
1027 /* If the examine succeeds, we remember its size and format for next time. */
1028 last_size
= fmt
.size
;
1029 last_format
= fmt
.format
;
1031 /* Set a couple of internal variables if appropriate. */
1032 if (last_examine_value
)
1034 /* Make last address examined available to the user as $_. Use
1035 the correct pointer type. */
1036 set_internalvar (lookup_internalvar ("_"),
1037 value_from_longest (
1038 lookup_pointer_type (VALUE_TYPE (last_examine_value
)),
1039 (LONGEST
) last_examine_address
));
1041 /* Make contents of last address examined available to the user as $__.*/
1042 set_internalvar (lookup_internalvar ("__"), last_examine_value
);
1047 /* Add an expression to the auto-display chain.
1048 Specify the expression. */
1051 display_command (exp
, from_tty
)
1055 struct format_data fmt
;
1056 register struct expression
*expr
;
1057 register struct display
*new;
1068 fmt
= decode_format (&exp
, 0, 0);
1069 if (fmt
.size
&& fmt
.format
== 0)
1071 if (fmt
.format
== 'i' || fmt
.format
== 's')
1081 innermost_block
= 0;
1082 expr
= parse_expression (exp
);
1084 new = (struct display
*) xmalloc (sizeof (struct display
));
1087 new->block
= innermost_block
;
1088 new->next
= display_chain
;
1089 new->number
= ++display_number
;
1091 new->status
= enabled
;
1092 display_chain
= new;
1094 if (from_tty
&& target_has_execution
)
1095 do_one_display (new);
1108 /* Clear out the display_chain.
1109 Done when new symtabs are loaded, since this invalidates
1110 the types stored in many expressions. */
1115 register struct display
*d
;
1117 while ((d
= display_chain
) != NULL
)
1120 display_chain
= d
->next
;
1125 /* Delete the auto-display number NUM. */
1128 delete_display (num
)
1131 register struct display
*d1
, *d
;
1134 error ("No display number %d.", num
);
1136 if (display_chain
->number
== num
)
1139 display_chain
= d1
->next
;
1143 for (d
= display_chain
; ; d
= d
->next
)
1146 error ("No display number %d.", num
);
1147 if (d
->next
->number
== num
)
1157 /* Delete some values from the auto-display chain.
1158 Specify the element numbers. */
1161 undisplay_command (args
, from_tty
)
1165 register char *p
= args
;
1171 if (query ("Delete all auto-display expressions? "))
1180 while (*p1
>= '0' && *p1
<= '9') p1
++;
1181 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1182 error ("Arguments must be display numbers.");
1186 delete_display (num
);
1189 while (*p
== ' ' || *p
== '\t') p
++;
1194 /* Display a single auto-display.
1195 Do nothing if the display cannot be printed in the current context,
1196 or if the display is disabled. */
1202 int within_current_scope
;
1204 if (d
->status
== disabled
)
1208 within_current_scope
= contained_in (get_selected_block (), d
->block
);
1210 within_current_scope
= 1;
1211 if (!within_current_scope
)
1214 current_display_number
= d
->number
;
1216 printf_filtered ("%d: ", d
->number
);
1221 printf_filtered ("x/");
1222 if (d
->format
.count
!= 1)
1223 printf_filtered ("%d", d
->format
.count
);
1224 printf_filtered ("%c", d
->format
.format
);
1225 if (d
->format
.format
!= 'i' && d
->format
.format
!= 's')
1226 printf_filtered ("%c", d
->format
.size
);
1227 printf_filtered (" ");
1228 print_expression (d
->exp
, stdout
);
1229 if (d
->format
.count
!= 1)
1230 printf_filtered ("\n");
1232 printf_filtered (" ");
1234 addr
= value_as_pointer (evaluate_expression (d
->exp
));
1235 if (d
->format
.format
== 'i')
1236 addr
= ADDR_BITS_REMOVE (addr
);
1238 do_examine (d
->format
, addr
);
1242 if (d
->format
.format
)
1243 printf_filtered ("/%c ", d
->format
.format
);
1244 print_expression (d
->exp
, stdout
);
1245 printf_filtered (" = ");
1246 print_formatted (evaluate_expression (d
->exp
),
1247 d
->format
.format
, d
->format
.size
);
1248 printf_filtered ("\n");
1252 current_display_number
= -1;
1255 /* Display all of the values on the auto-display chain which can be
1256 evaluated in the current scope. */
1261 register struct display
*d
;
1263 for (d
= display_chain
; d
; d
= d
->next
)
1267 /* Delete the auto-display which we were in the process of displaying.
1268 This is done when there is an error or a signal. */
1271 disable_display (num
)
1274 register struct display
*d
;
1276 for (d
= display_chain
; d
; d
= d
->next
)
1277 if (d
->number
== num
)
1279 d
->status
= disabled
;
1282 printf ("No display number %d.\n", num
);
1286 disable_current_display ()
1288 if (current_display_number
>= 0)
1290 disable_display (current_display_number
);
1291 fprintf (stderr
, "Disabling display %d to avoid infinite recursion.\n",
1292 current_display_number
);
1294 current_display_number
= -1;
1298 display_info (ignore
, from_tty
)
1302 register struct display
*d
;
1305 printf ("There are no auto-display expressions now.\n");
1307 printf_filtered ("Auto-display expressions now in effect:\n\
1308 Num Enb Expression\n");
1310 for (d
= display_chain
; d
; d
= d
->next
)
1312 printf_filtered ("%d: %c ", d
->number
, "ny"[(int)d
->status
]);
1314 printf_filtered ("/%d%c%c ", d
->format
.count
, d
->format
.size
,
1316 else if (d
->format
.format
)
1317 printf_filtered ("/%c ", d
->format
.format
);
1318 print_expression (d
->exp
, stdout
);
1319 if (d
->block
&& !contained_in (get_selected_block (), d
->block
))
1320 printf_filtered (" (cannot be evaluated in the current context)");
1321 printf_filtered ("\n");
1327 enable_display (args
, from_tty
)
1331 register char *p
= args
;
1334 register struct display
*d
;
1338 for (d
= display_chain
; d
; d
= d
->next
)
1339 d
->status
= enabled
;
1345 while (*p1
>= '0' && *p1
<= '9')
1347 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1348 error ("Arguments must be display numbers.");
1352 for (d
= display_chain
; d
; d
= d
->next
)
1353 if (d
->number
== num
)
1355 d
->status
= enabled
;
1358 printf ("No display number %d.\n", num
);
1361 while (*p
== ' ' || *p
== '\t')
1368 disable_display_command (args
, from_tty
)
1372 register char *p
= args
;
1374 register struct display
*d
;
1378 for (d
= display_chain
; d
; d
= d
->next
)
1379 d
->status
= disabled
;
1385 while (*p1
>= '0' && *p1
<= '9')
1387 if (*p1
&& *p1
!= ' ' && *p1
!= '\t')
1388 error ("Arguments must be display numbers.");
1390 disable_display (atoi (p
));
1393 while (*p
== ' ' || *p
== '\t')
1399 /* Print the value in stack frame FRAME of a variable
1400 specified by a struct symbol. */
1403 print_variable_value (var
, frame
, stream
)
1408 value val
= read_var_value (var
, frame
);
1409 value_print (val
, stream
, 0, Val_pretty_default
);
1412 /* Print the arguments of a stack frame, given the function FUNC
1413 running in that frame (as a symbol), the info on the frame,
1414 and the number of args according to the stack frame (or -1 if unknown). */
1416 /* References here and elsewhere to "number of args according to the
1417 stack frame" appear in all cases to refer to "number of ints of args
1418 according to the stack frame". At least for VAX, i386, isi. */
1421 print_frame_args (func
, fi
, num
, stream
)
1422 struct symbol
*func
;
1423 struct frame_info
*fi
;
1431 register struct symbol
*sym
;
1433 /* Offset of next stack argument beyond the one we have seen that is
1434 at the highest offset.
1435 -1 if we haven't come to a stack argument yet. */
1436 long highest_offset
= -1;
1438 /* Number of ints of arguments that we have printed so far. */
1439 int args_printed
= 0;
1443 b
= SYMBOL_BLOCK_VALUE (func
);
1444 nsyms
= BLOCK_NSYMS (b
);
1447 for (i
= 0; i
< nsyms
; i
++)
1450 sym
= BLOCK_SYM (b
, i
);
1452 /* Keep track of the highest stack argument offset seen, and
1453 skip over any kinds of symbols we don't care about. */
1455 switch (SYMBOL_CLASS (sym
)) {
1459 long current_offset
= SYMBOL_VALUE (sym
);
1461 arg_size
= TYPE_LENGTH (SYMBOL_TYPE (sym
));
1463 /* Compute address of next argument by adding the size of
1464 this argument and rounding to an int boundary. */
1466 = ((current_offset
+ arg_size
+ sizeof (int) - 1)
1467 & ~(sizeof (int) - 1));
1469 /* If this is the highest offset seen yet, set highest_offset. */
1470 if (highest_offset
== -1
1471 || (current_offset
> highest_offset
))
1472 highest_offset
= current_offset
;
1474 /* Add the number of ints we're about to print to args_printed. */
1475 args_printed
+= (arg_size
+ sizeof (int) - 1) / sizeof (int);
1478 /* We care about types of symbols, but don't need to keep track of
1479 stack offsets in them. */
1484 /* Other types of symbols we just skip over. */
1489 /* If the symbol name is non-null,
1490 we have to re-look-up the symbol because arguments often have
1491 two entries (one a parameter, one a register or local), and the one
1492 we want is the non-parm, which lookup_symbol will find for
1493 us. After this, sym could be any SYMBOL_CLASS...
1495 Null parameter names occur on the RS/6000, for traceback tables.
1496 FIXME, should we even print them? */
1498 if (*SYMBOL_NAME (sym
))
1499 sym
= lookup_symbol (SYMBOL_NAME (sym
),
1500 b
, VAR_NAMESPACE
, (int *)NULL
, (struct symtab
**)NULL
);
1502 /* Print the current arg. */
1504 fprintf_filtered (stream
, ", ");
1506 fprint_symbol (stream
, SYMBOL_NAME (sym
));
1507 fputs_filtered ("=", stream
);
1509 /* Avoid value_print because it will deref ref parameters. We just
1510 want to print their addresses. Print ??? for args whose address
1511 we do not know. We pass 2 as "recurse" to val_print because our
1512 standard indentation here is 4 spaces, and val_print indents
1513 2 for each recurse. */
1514 val
= read_var_value (sym
, FRAME_INFO_ID (fi
));
1516 val_print (VALUE_TYPE (val
), VALUE_CONTENTS (val
), VALUE_ADDRESS (val
),
1517 stream
, 0, 0, 2, Val_no_prettyprint
);
1519 fputs_filtered ("???", stream
);
1523 /* Don't print nameless args in situations where we don't know
1524 enough about the stack to find them. */
1530 if (highest_offset
== -1)
1531 start
= FRAME_ARGS_SKIP
;
1533 start
= highest_offset
;
1535 addr
= FRAME_ARGS_ADDRESS (fi
);
1537 print_frame_nameless_args (addr
, start
, num
- args_printed
,
1542 /* Print nameless args on STREAM.
1543 ARGSADDR is the address of the arglist, START is the offset
1544 of the first nameless arg, and NUM is the number of nameless args to
1545 print. FIRST is nonzero if this is the first argument (not just
1546 the first nameless arg). */
1548 print_frame_nameless_args (argsaddr
, start
, num
, first
, stream
)
1556 for (i
= 0; i
< num
; i
++)
1560 fprintf_filtered (stream
, ", ");
1561 #ifndef PRINT_TYPELESS_INTEGER
1562 fprintf_filtered (stream
, "%d",
1563 read_memory_integer (argsaddr
+ start
, sizeof (int)));
1565 PRINT_TYPELESS_INTEGER (stream
, builtin_type_int
,
1567 read_memory_integer (argsaddr
+ start
,
1571 start
+= sizeof (int);
1577 printf_command (arg
, from_tty
)
1582 register char *s
= arg
;
1586 int allocated_args
= 20;
1589 val_args
= (value
*) xmalloc (allocated_args
* sizeof (value
));
1592 error_no_arg ("format-control string and values to print");
1594 /* Skip white space before format string */
1595 while (*s
== ' ' || *s
== '\t') s
++;
1597 /* A format string should follow, enveloped in double quotes */
1599 error ("Bad format string, missing '\"'.");
1601 /* Parse the format-control string and copy it into the string STRING,
1602 processing some kinds of escape sequence. */
1604 f
= string
= (char *) alloca (strlen (s
) + 1);
1611 error ("Bad format string, non-terminated '\"'.");
1612 /* doesn't return */
1633 /* ??? TODO: handle other escape sequences */
1634 error ("Unrecognized \\ escape character in format string.");
1643 /* Skip over " and following space and comma. */
1646 while (*s
== ' ' || *s
== '\t') s
++;
1648 if (*s
!= ',' && *s
!= 0)
1649 error ("Invalid argument syntax");
1652 while (*s
== ' ' || *s
== '\t') s
++;
1655 /* Now scan the string for %-specs and see what kinds of args they want.
1656 argclass[I] classifies the %-specs so we can give vprintf something
1657 of the right size. */
1659 enum argclass
{int_arg
, string_arg
, double_arg
, long_long_arg
};
1660 enum argclass
*argclass
;
1666 argclass
= (enum argclass
*) alloca (strlen (s
) * sizeof *argclass
);
1673 while (strchr ("0123456789.hlL-+ #", *f
))
1675 if (*f
== 'l' || *f
== 'L')
1680 argclass
[nargs_wanted
++] = string_arg
;
1681 else if (*f
== 'e' || *f
== 'f' || *f
== 'g')
1682 argclass
[nargs_wanted
++] = double_arg
;
1683 else if (lcount
> 1)
1684 argclass
[nargs_wanted
++] = long_long_arg
;
1686 argclass
[nargs_wanted
++] = int_arg
;
1690 /* Now, parse all arguments and evaluate them.
1691 Store the VALUEs in VAL_ARGS. */
1696 if (nargs
== allocated_args
)
1697 val_args
= (value
*) xrealloc ((char *) val_args
,
1698 (allocated_args
*= 2)
1701 val_args
[nargs
] = parse_to_comma_and_eval (&s1
);
1703 /* If format string wants a float, unchecked-convert the value to
1704 floating point of the same size */
1706 if (argclass
[nargs
] == double_arg
)
1708 if (TYPE_LENGTH (VALUE_TYPE (val_args
[nargs
])) == sizeof (float))
1709 VALUE_TYPE (val_args
[nargs
]) = builtin_type_float
;
1710 if (TYPE_LENGTH (VALUE_TYPE (val_args
[nargs
])) == sizeof (double))
1711 VALUE_TYPE (val_args
[nargs
]) = builtin_type_double
;
1719 if (nargs
!= nargs_wanted
)
1720 error ("Wrong number of arguments for specified format-string");
1722 /* Now lay out an argument-list containing the arguments
1723 as doubles, integers and C pointers. */
1725 arg_bytes
= (char *) alloca (sizeof (double) * nargs
);
1727 for (i
= 0; i
< nargs
; i
++)
1729 if (argclass
[i
] == string_arg
)
1734 tem
= value_as_pointer (val_args
[i
]);
1736 /* This is a %s argument. Find the length of the string. */
1741 read_memory (tem
+ j
, &c
, 1);
1746 /* Copy the string contents into a string inside GDB. */
1747 str
= (char *) alloca (j
+ 1);
1748 read_memory (tem
, str
, j
);
1751 /* Pass address of internal copy as the arg to vprintf. */
1752 *((int *) &arg_bytes
[argindex
]) = (int) str
;
1753 argindex
+= sizeof (int);
1755 else if (VALUE_TYPE (val_args
[i
])->code
== TYPE_CODE_FLT
)
1757 *((double *) &arg_bytes
[argindex
]) = value_as_double (val_args
[i
]);
1758 argindex
+= sizeof (double);
1762 if (argclass
[i
] == long_long_arg
)
1764 *(long long *) &arg_bytes
[argindex
] = value_as_long (val_args
[i
]);
1765 argindex
+= sizeof (long long);
1770 *((long *) &arg_bytes
[argindex
]) = value_as_long (val_args
[i
]);
1771 argindex
+= sizeof (long);
1776 /* There is not a standard way to make a va_list, so we need
1777 to do various things for different systems. */
1778 #if defined (__INT_VARARGS_H)
1783 list
.__va_stk
= (int *) arg_bytes
;
1784 list
.__va_reg
= (int *) arg_bytes
;
1785 vprintf (string
, list
);
1787 #else /* No __INT_VARARGS_H. */
1788 vprintf (string
, arg_bytes
);
1789 #endif /* No __INT_VARARGS_H. */
1792 /* Helper function for asdump_command. Finds the bounds of a function
1793 for a specified section of text. PC is an address within the
1794 function which you want bounds for; *LOW and *HIGH are set to the
1795 beginning (inclusive) and end (exclusive) of the function. This
1796 function returns 1 on success and 0 on failure. */
1799 containing_function_bounds (pc
, low
, high
)
1800 CORE_ADDR pc
, *low
, *high
;
1804 if (!find_pc_partial_function (pc
, 0, low
))
1810 if (!find_pc_partial_function (scan
, 0, high
))
1812 } while (*low
== *high
);
1817 /* Dump a specified section of assembly code. With no command line
1818 arguments, this command will dump the assembly code for the
1819 function surrounding the pc value in the selected frame. With one
1820 argument, it will dump the assembly code surrounding that pc value.
1821 Two arguments are interpeted as bounds within which to dump
1826 disassemble_command (arg
, from_tty
)
1830 CORE_ADDR low
, high
;
1836 if (!selected_frame
)
1837 error ("No frame selected.\n");
1839 pc
= get_frame_pc (selected_frame
);
1840 if (!containing_function_bounds (pc
, &low
, &high
))
1841 error ("No function contains pc specified by selected frame.\n");
1843 else if (!(space_index
= (char *) strchr (arg
, ' ')))
1846 pc
= parse_and_eval_address (arg
);
1847 if (!containing_function_bounds (pc
, &low
, &high
))
1848 error ("No function contains specified pc.\n");
1852 /* Two arguments. */
1853 *space_index
= '\0';
1854 low
= parse_and_eval_address (arg
);
1855 high
= parse_and_eval_address (space_index
+ 1);
1858 printf_filtered ("Dump of assembler code ");
1862 find_pc_partial_function (pc
, &name
, 0);
1863 printf_filtered ("for function %s:\n", name
);
1866 printf_filtered ("from %s ", local_hex_string(low
));
1867 printf_filtered ("to %s:\n", local_hex_string(high
));
1869 /* Dump the specified range. */
1870 for (pc
= low
; pc
< high
; )
1873 print_address (pc
, stdout
);
1874 printf_filtered (":\t");
1875 pc
+= print_insn (pc
, stdout
);
1876 printf_filtered ("\n");
1878 printf_filtered ("End of assembler dump.\n");
1884 _initialize_printcmd ()
1886 current_display_number
= -1;
1888 add_info ("address", address_info
,
1889 "Describe where variable VAR is stored.");
1891 add_com ("x", class_vars
, x_command
,
1892 "Examine memory: x/FMT ADDRESS.\n\
1893 ADDRESS is an expression for the memory address to examine.\n\
1894 FMT is a repeat count followed by a format letter and a size letter.\n\
1895 Format letters are o(octal), x(hex), d(decimal), u(unsigned decimal),\n\
1896 f(float), a(address), i(instruction), c(char) and s(string).\n\
1897 Size letters are b(byte), h(halfword), w(word), g(giant, 8 bytes).\n\
1898 g is meaningful only with f, for type double.\n\
1899 The specified number of objects of the specified size are printed\n\
1900 according to the format.\n\n\
1901 Defaults for format and size letters are those previously used.\n\
1902 Default count is 1. Default address is following last thing printed\n\
1903 with this command or \"print\".");
1905 add_com ("disassemble", class_vars
, disassemble_command
,
1906 "Disassemble a specified section of memory.\n\
1907 Default is the function surrounding the pc of the selected frame.\n\
1908 With a single argument, the function surrounding that address is dumped.\n\
1909 Two arguments are taken as a range of memory to dump.");
1912 add_com ("whereis", class_vars
, whereis_command
,
1913 "Print line number and file of definition of variable.");
1916 add_info ("display", display_info
,
1917 "Expressions to display when program stops, with code numbers.");
1919 add_cmd ("undisplay", class_vars
, undisplay_command
,
1920 "Cancel some expressions to be displayed when program stops.\n\
1921 Arguments are the code numbers of the expressions to stop displaying.\n\
1922 No argument means cancel all automatic-display expressions.\n\
1923 \"delete display\" has the same effect as this command.\n\
1924 Do \"info display\" to see current list of code numbers.",
1927 add_com ("display", class_vars
, display_command
,
1928 "Print value of expression EXP each time the program stops.\n\
1929 /FMT may be used before EXP as in the \"print\" command.\n\
1930 /FMT \"i\" or \"s\" or including a size-letter is allowed,\n\
1931 as in the \"x\" command, and then EXP is used to get the address to examine\n\
1932 and examining is done as in the \"x\" command.\n\n\
1933 With no argument, display all currently requested auto-display expressions.\n\
1934 Use \"undisplay\" to cancel display requests previously made.");
1936 add_cmd ("display", class_vars
, enable_display
,
1937 "Enable some expressions to be displayed when program stops.\n\
1938 Arguments are the code numbers of the expressions to resume displaying.\n\
1939 No argument means enable all automatic-display expressions.\n\
1940 Do \"info display\" to see current list of code numbers.", &enablelist
);
1942 add_cmd ("display", class_vars
, disable_display_command
,
1943 "Disable some expressions to be displayed when program stops.\n\
1944 Arguments are the code numbers of the expressions to stop displaying.\n\
1945 No argument means disable all automatic-display expressions.\n\
1946 Do \"info display\" to see current list of code numbers.", &disablelist
);
1948 add_cmd ("display", class_vars
, undisplay_command
,
1949 "Cancel some expressions to be displayed when program stops.\n\
1950 Arguments are the code numbers of the expressions to stop displaying.\n\
1951 No argument means cancel all automatic-display expressions.\n\
1952 Do \"info display\" to see current list of code numbers.", &deletelist
);
1954 add_com ("printf", class_vars
, printf_command
,
1955 "printf \"printf format string\", arg1, arg2, arg3, ..., argn\n\
1956 This is useful for formatted output in user-defined commands.");
1957 add_com ("output", class_vars
, output_command
,
1958 "Like \"print\" but don't put in value history and don't print newline.\n\
1959 This is useful in user-defined commands.");
1961 add_prefix_cmd ("set", class_vars
, set_command
,
1962 "Perform an assignment VAR = EXP.\n\
1963 You must type the \"=\". VAR may be a debugger \"convenience\" variable\n\
1964 (names starting with $), a register (a few standard names starting with $),\n\
1965 or an actual variable in the program being debugged. EXP is any expression.\n\
1966 Use \"set variable\" for variables with names identical to set subcommands.\n\
1967 \nWith a subcommand, this command modifies parts of the gdb environment.\n\
1968 You can see these environment settings with the \"show\" command.",
1969 &setlist
, "set ", 1, &cmdlist
);
1971 /* "call" is the same as "set", but handy for dbx users to call fns. */
1972 add_com ("call", class_vars
, call_command
,
1973 "Call a function in the inferior process.\n\
1974 The argument is the function name and arguments, in the notation of the\n\
1975 current working language. The result is printed and saved in the value\n\
1976 history, if it is not void.");
1978 add_cmd ("variable", class_vars
, set_command
,
1979 "Perform an assignment VAR = EXP.\n\
1980 You must type the \"=\". VAR may be a debugger \"convenience\" variable\n\
1981 (names starting with $), a register (a few standard names starting with $),\n\
1982 or an actual variable in the program being debugged. EXP is any expression.\n\
1983 This may usually be abbreviated to simply \"set\".",
1986 add_com ("print", class_vars
, print_command
,
1987 concat ("Print value of expression EXP.\n\
1988 Variables accessible are those of the lexical environment of the selected\n\
1989 stack frame, plus all those whose scope is global or an entire file.\n\
1991 $NUM gets previous value number NUM. $ and $$ are the last two values.\n\
1992 $$NUM refers to NUM'th value back from the last one.\n\
1993 Names starting with $ refer to registers (with the values they would have\n\
1994 if the program were to return to the stack frame now selected, restoring\n\
1995 all registers saved by frames farther in) or else to debugger\n\
1996 \"convenience\" variables (any such name not a known register).\n\
1997 Use assignment expressions to give values to convenience variables.\n",
1999 {TYPE}ADREXP refers to a datum of data type TYPE, located at address ADREXP.\n\
2000 @ is a binary operator for treating consecutive data objects\n\
2001 anywhere in memory as an array. FOO@NUM gives an array whose first\n\
2002 element is FOO, whose second element is stored in the space following\n\
2003 where FOO is stored, etc. FOO must be an expression whose value\n\
2004 resides in memory.\n",
2006 EXP may be preceded with /FMT, where FMT is a format letter\n\
2007 but no count or size letter (see \"x\" command).", NULL
));
2008 add_com_alias ("p", "print", class_vars
, 1);
2010 add_com ("inspect", class_vars
, inspect_command
,
2011 "Same as \"print\" command, except that if you are running in the epoch\n\
2012 environment, the value is printed in its own window.");