1 /* Print values for GDB, the GNU debugger.
3 Copyright (C) 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
4 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
5 Free Software Foundation, Inc.
7 This file is part of GDB.
9 This program is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2 of the License, or
12 (at your option) any later version.
14 This program is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with this program; if not, write to the Free Software
21 Foundation, Inc., 51 Franklin Street, Fifth Floor,
22 Boston, MA 02110-1301, USA. */
25 #include "gdb_string.h"
35 #include "floatformat.h"
37 #include "exceptions.h"
41 /* Prototypes for local functions */
43 static int partial_memory_read (CORE_ADDR memaddr
, gdb_byte
*myaddr
,
44 int len
, int *errnoptr
);
46 static void show_print (char *, int);
48 static void set_print (char *, int);
50 static void set_radix (char *, int);
52 static void show_radix (char *, int);
54 static void set_input_radix (char *, int, struct cmd_list_element
*);
56 static void set_input_radix_1 (int, unsigned);
58 static void set_output_radix (char *, int, struct cmd_list_element
*);
60 static void set_output_radix_1 (int, unsigned);
62 void _initialize_valprint (void);
64 /* Maximum number of chars to print for a string pointer value or vector
65 contents, or UINT_MAX for no limit. Note that "set print elements 0"
66 stores UINT_MAX in print_max, which displays in a show command as
69 unsigned int print_max
;
70 #define PRINT_MAX_DEFAULT 200 /* Start print_max off at this value. */
72 show_print_max (struct ui_file
*file
, int from_tty
,
73 struct cmd_list_element
*c
, const char *value
)
75 fprintf_filtered (file
, _("\
76 Limit on string chars or array elements to print is %s.\n"),
81 /* Default input and output radixes, and output format letter. */
83 unsigned input_radix
= 10;
85 show_input_radix (struct ui_file
*file
, int from_tty
,
86 struct cmd_list_element
*c
, const char *value
)
88 fprintf_filtered (file
, _("\
89 Default input radix for entering numbers is %s.\n"),
93 unsigned output_radix
= 10;
95 show_output_radix (struct ui_file
*file
, int from_tty
,
96 struct cmd_list_element
*c
, const char *value
)
98 fprintf_filtered (file
, _("\
99 Default output radix for printing of values is %s.\n"),
102 int output_format
= 0;
104 /* By default we print arrays without printing the index of each element in
105 the array. This behavior can be changed by setting PRINT_ARRAY_INDEXES. */
107 static int print_array_indexes
= 0;
109 show_print_array_indexes (struct ui_file
*file
, int from_tty
,
110 struct cmd_list_element
*c
, const char *value
)
112 fprintf_filtered (file
, _("Printing of array indexes is %s.\n"), value
);
115 /* Print repeat counts if there are more than this many repetitions of an
116 element in an array. Referenced by the low level language dependent
119 unsigned int repeat_count_threshold
= 10;
121 show_repeat_count_threshold (struct ui_file
*file
, int from_tty
,
122 struct cmd_list_element
*c
, const char *value
)
124 fprintf_filtered (file
, _("Threshold for repeated print elements is %s.\n"),
128 /* If nonzero, stops printing of char arrays at first null. */
130 int stop_print_at_null
;
132 show_stop_print_at_null (struct ui_file
*file
, int from_tty
,
133 struct cmd_list_element
*c
, const char *value
)
135 fprintf_filtered (file
, _("\
136 Printing of char arrays to stop at first null char is %s.\n"),
140 /* Controls pretty printing of structures. */
142 int prettyprint_structs
;
144 show_prettyprint_structs (struct ui_file
*file
, int from_tty
,
145 struct cmd_list_element
*c
, const char *value
)
147 fprintf_filtered (file
, _("Prettyprinting of structures is %s.\n"), value
);
150 /* Controls pretty printing of arrays. */
152 int prettyprint_arrays
;
154 show_prettyprint_arrays (struct ui_file
*file
, int from_tty
,
155 struct cmd_list_element
*c
, const char *value
)
157 fprintf_filtered (file
, _("Prettyprinting of arrays is %s.\n"), value
);
160 /* If nonzero, causes unions inside structures or other unions to be
163 int unionprint
; /* Controls printing of nested unions. */
165 show_unionprint (struct ui_file
*file
, int from_tty
,
166 struct cmd_list_element
*c
, const char *value
)
168 fprintf_filtered (file
, _("\
169 Printing of unions interior to structures is %s.\n"),
173 /* If nonzero, causes machine addresses to be printed in certain contexts. */
175 int addressprint
; /* Controls printing of machine addresses */
177 show_addressprint (struct ui_file
*file
, int from_tty
,
178 struct cmd_list_element
*c
, const char *value
)
180 fprintf_filtered (file
, _("Printing of addresses is %s.\n"), value
);
184 /* Print data of type TYPE located at VALADDR (within GDB), which came from
185 the inferior at address ADDRESS, onto stdio stream STREAM according to
186 FORMAT (a letter, or 0 for natural format using TYPE).
188 If DEREF_REF is nonzero, then dereference references, otherwise just print
191 The PRETTY parameter controls prettyprinting.
193 If the data are a string pointer, returns the number of string characters
196 FIXME: The data at VALADDR is in target byte order. If gdb is ever
197 enhanced to be able to debug more than the single target it was compiled
198 for (specific CPU type and thus specific target byte ordering), then
199 either the print routines are going to have to take this into account,
200 or the data is going to have to be passed into here already converted
201 to the host byte ordering, whichever is more convenient. */
205 val_print (struct type
*type
, const gdb_byte
*valaddr
, int embedded_offset
,
206 CORE_ADDR address
, struct ui_file
*stream
, int format
,
207 int deref_ref
, int recurse
, enum val_prettyprint pretty
)
209 volatile struct gdb_exception except
;
210 volatile enum val_prettyprint real_pretty
= pretty
;
213 struct type
*real_type
= check_typedef (type
);
214 if (pretty
== Val_pretty_default
)
215 real_pretty
= prettyprint_structs
? Val_prettyprint
: Val_no_prettyprint
;
219 /* Ensure that the type is complete and not just a stub. If the type is
220 only a stub and we can't find and substitute its complete type, then
221 print appropriate string and return. */
223 if (TYPE_STUB (real_type
))
225 fprintf_filtered (stream
, "<incomplete type>");
230 TRY_CATCH (except
, RETURN_MASK_ERROR
)
232 ret
= LA_VAL_PRINT (type
, valaddr
, embedded_offset
, address
,
233 stream
, format
, deref_ref
, recurse
, real_pretty
);
235 if (except
.reason
< 0)
236 fprintf_filtered (stream
, _("<error reading variable>"));
241 /* Check whether the value VAL is printable. Return 1 if it is;
242 return 0 and print an appropriate error message to STREAM if it
246 value_check_printable (struct value
*val
, struct ui_file
*stream
)
250 fprintf_filtered (stream
, _("<address of value unknown>"));
254 if (value_optimized_out (val
))
256 fprintf_filtered (stream
, _("<value optimized out>"));
263 /* Print the value VAL onto stream STREAM according to FORMAT (a
264 letter, or 0 for natural format using TYPE).
266 If DEREF_REF is nonzero, then dereference references, otherwise just print
269 The PRETTY parameter controls prettyprinting.
271 If the data are a string pointer, returns the number of string characters
274 This is a preferable interface to val_print, above, because it uses
275 GDB's value mechanism. */
278 common_val_print (struct value
*val
, struct ui_file
*stream
, int format
,
279 int deref_ref
, int recurse
, enum val_prettyprint pretty
)
281 if (!value_check_printable (val
, stream
))
284 return val_print (value_type (val
), value_contents_all (val
),
285 value_embedded_offset (val
), VALUE_ADDRESS (val
),
286 stream
, format
, deref_ref
, recurse
, pretty
);
289 /* Print the value VAL in C-ish syntax on stream STREAM.
290 FORMAT is a format-letter, or 0 for print in natural format of data type.
291 If the object printed is a string pointer, returns
292 the number of string bytes printed. */
295 value_print (struct value
*val
, struct ui_file
*stream
, int format
,
296 enum val_prettyprint pretty
)
298 if (!value_check_printable (val
, stream
))
301 return LA_VALUE_PRINT (val
, stream
, format
, pretty
);
304 /* Called by various <lang>_val_print routines to print
305 TYPE_CODE_INT's. TYPE is the type. VALADDR is the address of the
306 value. STREAM is where to print the value. */
309 val_print_type_code_int (struct type
*type
, const gdb_byte
*valaddr
,
310 struct ui_file
*stream
)
312 if (TYPE_LENGTH (type
) > sizeof (LONGEST
))
316 if (TYPE_UNSIGNED (type
)
317 && extract_long_unsigned_integer (valaddr
, TYPE_LENGTH (type
),
320 print_longest (stream
, 'u', 0, val
);
324 /* Signed, or we couldn't turn an unsigned value into a
325 LONGEST. For signed values, one could assume two's
326 complement (a reasonable assumption, I think) and do
328 print_hex_chars (stream
, (unsigned char *) valaddr
,
334 print_longest (stream
, TYPE_UNSIGNED (type
) ? 'u' : 'd', 0,
335 unpack_long (type
, valaddr
));
340 val_print_type_code_flags (struct type
*type
, const gdb_byte
*valaddr
,
341 struct ui_file
*stream
)
343 ULONGEST val
= unpack_long (type
, valaddr
);
344 int bitpos
, nfields
= TYPE_NFIELDS (type
);
346 fputs_filtered ("[ ", stream
);
347 for (bitpos
= 0; bitpos
< nfields
; bitpos
++)
349 if (TYPE_FIELD_BITPOS (type
, bitpos
) != -1
350 && (val
& ((ULONGEST
)1 << bitpos
)))
352 if (TYPE_FIELD_NAME (type
, bitpos
))
353 fprintf_filtered (stream
, "%s ", TYPE_FIELD_NAME (type
, bitpos
));
355 fprintf_filtered (stream
, "#%d ", bitpos
);
358 fputs_filtered ("]", stream
);
361 /* Print a number according to FORMAT which is one of d,u,x,o,b,h,w,g.
362 The raison d'etre of this function is to consolidate printing of
363 LONG_LONG's into this one function. The format chars b,h,w,g are
364 from print_scalar_formatted(). Numbers are printed using C
367 USE_C_FORMAT means to use C format in all cases. Without it,
368 'o' and 'x' format do not include the standard C radix prefix
371 Hilfinger/2004-09-09: USE_C_FORMAT was originally called USE_LOCAL
372 and was intended to request formating according to the current
373 language and would be used for most integers that GDB prints. The
374 exceptional cases were things like protocols where the format of
375 the integer is a protocol thing, not a user-visible thing). The
376 parameter remains to preserve the information of what things might
377 be printed with language-specific format, should we ever resurrect
381 print_longest (struct ui_file
*stream
, int format
, int use_c_format
,
389 val
= int_string (val_long
, 10, 1, 0, 1); break;
391 val
= int_string (val_long
, 10, 0, 0, 1); break;
393 val
= int_string (val_long
, 16, 0, 0, use_c_format
); break;
395 val
= int_string (val_long
, 16, 0, 2, 1); break;
397 val
= int_string (val_long
, 16, 0, 4, 1); break;
399 val
= int_string (val_long
, 16, 0, 8, 1); break;
401 val
= int_string (val_long
, 16, 0, 16, 1); break;
404 val
= int_string (val_long
, 8, 0, 0, use_c_format
); break;
406 internal_error (__FILE__
, __LINE__
, _("failed internal consistency check"));
408 fputs_filtered (val
, stream
);
411 /* This used to be a macro, but I don't think it is called often enough
412 to merit such treatment. */
413 /* Convert a LONGEST to an int. This is used in contexts (e.g. number of
414 arguments to a function, number in a value history, register number, etc.)
415 where the value must not be larger than can fit in an int. */
418 longest_to_int (LONGEST arg
)
420 /* Let the compiler do the work */
421 int rtnval
= (int) arg
;
423 /* Check for overflows or underflows */
424 if (sizeof (LONGEST
) > sizeof (int))
428 error (_("Value out of range."));
434 /* Print a floating point value of type TYPE (not always a
435 TYPE_CODE_FLT), pointed to in GDB by VALADDR, on STREAM. */
438 print_floating (const gdb_byte
*valaddr
, struct type
*type
,
439 struct ui_file
*stream
)
443 const struct floatformat
*fmt
= NULL
;
444 unsigned len
= TYPE_LENGTH (type
);
445 enum float_kind kind
;
447 /* If it is a floating-point, check for obvious problems. */
448 if (TYPE_CODE (type
) == TYPE_CODE_FLT
)
449 fmt
= floatformat_from_type (type
);
452 kind
= floatformat_classify (fmt
, valaddr
);
453 if (kind
== float_nan
)
455 if (floatformat_is_negative (fmt
, valaddr
))
456 fprintf_filtered (stream
, "-");
457 fprintf_filtered (stream
, "nan(");
458 fputs_filtered ("0x", stream
);
459 fputs_filtered (floatformat_mantissa (fmt
, valaddr
), stream
);
460 fprintf_filtered (stream
, ")");
463 else if (kind
== float_infinite
)
465 if (floatformat_is_negative (fmt
, valaddr
))
466 fputs_filtered ("-", stream
);
467 fputs_filtered ("inf", stream
);
472 /* NOTE: cagney/2002-01-15: The TYPE passed into print_floating()
473 isn't necessarily a TYPE_CODE_FLT. Consequently, unpack_double
474 needs to be used as that takes care of any necessary type
475 conversions. Such conversions are of course direct to DOUBLEST
476 and disregard any possible target floating point limitations.
477 For instance, a u64 would be converted and displayed exactly on a
478 host with 80 bit DOUBLEST but with loss of information on a host
479 with 64 bit DOUBLEST. */
481 doub
= unpack_double (type
, valaddr
, &inv
);
484 fprintf_filtered (stream
, "<invalid float value>");
488 /* FIXME: kettenis/2001-01-20: The following code makes too much
489 assumptions about the host and target floating point format. */
491 /* NOTE: cagney/2002-02-03: Since the TYPE of what was passed in may
492 not necessarily be a TYPE_CODE_FLT, the below ignores that and
493 instead uses the type's length to determine the precision of the
494 floating-point value being printed. */
496 if (len
< sizeof (double))
497 fprintf_filtered (stream
, "%.9g", (double) doub
);
498 else if (len
== sizeof (double))
499 fprintf_filtered (stream
, "%.17g", (double) doub
);
501 #ifdef PRINTF_HAS_LONG_DOUBLE
502 fprintf_filtered (stream
, "%.35Lg", doub
);
504 /* This at least wins with values that are representable as
506 fprintf_filtered (stream
, "%.17g", (double) doub
);
511 print_binary_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
515 #define BITS_IN_BYTES 8
521 /* Declared "int" so it will be signed.
522 * This ensures that right shift will shift in zeros.
524 const int mask
= 0x080;
526 /* FIXME: We should be not printing leading zeroes in most cases. */
528 if (gdbarch_byte_order (current_gdbarch
) == BFD_ENDIAN_BIG
)
534 /* Every byte has 8 binary characters; peel off
535 * and print from the MSB end.
537 for (i
= 0; i
< (BITS_IN_BYTES
* sizeof (*p
)); i
++)
539 if (*p
& (mask
>> i
))
544 fprintf_filtered (stream
, "%1d", b
);
550 for (p
= valaddr
+ len
- 1;
554 for (i
= 0; i
< (BITS_IN_BYTES
* sizeof (*p
)); i
++)
556 if (*p
& (mask
>> i
))
561 fprintf_filtered (stream
, "%1d", b
);
567 /* VALADDR points to an integer of LEN bytes.
568 * Print it in octal on stream or format it in buf.
571 print_octal_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
575 unsigned char octa1
, octa2
, octa3
, carry
;
578 /* FIXME: We should be not printing leading zeroes in most cases. */
581 /* Octal is 3 bits, which doesn't fit. Yuk. So we have to track
582 * the extra bits, which cycle every three bytes:
586 * bit number 123 456 78 | 9 012 345 6 | 78 901 234 | 567 890 12 |
588 * Octal side: 0 1 carry 3 4 carry ...
590 * Cycle number: 0 1 2
592 * But of course we are printing from the high side, so we have to
593 * figure out where in the cycle we are so that we end up with no
594 * left over bits at the end.
596 #define BITS_IN_OCTAL 3
597 #define HIGH_ZERO 0340
598 #define LOW_ZERO 0016
599 #define CARRY_ZERO 0003
600 #define HIGH_ONE 0200
603 #define CARRY_ONE 0001
604 #define HIGH_TWO 0300
608 /* For 32 we start in cycle 2, with two bits and one bit carry;
609 * for 64 in cycle in cycle 1, with one bit and a two bit carry.
611 cycle
= (len
* BITS_IN_BYTES
) % BITS_IN_OCTAL
;
614 fputs_filtered ("0", stream
);
615 if (gdbarch_byte_order (current_gdbarch
) == BFD_ENDIAN_BIG
)
624 /* No carry in, carry out two bits.
626 octa1
= (HIGH_ZERO
& *p
) >> 5;
627 octa2
= (LOW_ZERO
& *p
) >> 2;
628 carry
= (CARRY_ZERO
& *p
);
629 fprintf_filtered (stream
, "%o", octa1
);
630 fprintf_filtered (stream
, "%o", octa2
);
634 /* Carry in two bits, carry out one bit.
636 octa1
= (carry
<< 1) | ((HIGH_ONE
& *p
) >> 7);
637 octa2
= (MID_ONE
& *p
) >> 4;
638 octa3
= (LOW_ONE
& *p
) >> 1;
639 carry
= (CARRY_ONE
& *p
);
640 fprintf_filtered (stream
, "%o", octa1
);
641 fprintf_filtered (stream
, "%o", octa2
);
642 fprintf_filtered (stream
, "%o", octa3
);
646 /* Carry in one bit, no carry out.
648 octa1
= (carry
<< 2) | ((HIGH_TWO
& *p
) >> 6);
649 octa2
= (MID_TWO
& *p
) >> 3;
650 octa3
= (LOW_TWO
& *p
);
652 fprintf_filtered (stream
, "%o", octa1
);
653 fprintf_filtered (stream
, "%o", octa2
);
654 fprintf_filtered (stream
, "%o", octa3
);
658 error (_("Internal error in octal conversion;"));
662 cycle
= cycle
% BITS_IN_OCTAL
;
667 for (p
= valaddr
+ len
- 1;
674 /* Carry out, no carry in */
675 octa1
= (HIGH_ZERO
& *p
) >> 5;
676 octa2
= (LOW_ZERO
& *p
) >> 2;
677 carry
= (CARRY_ZERO
& *p
);
678 fprintf_filtered (stream
, "%o", octa1
);
679 fprintf_filtered (stream
, "%o", octa2
);
683 /* Carry in, carry out */
684 octa1
= (carry
<< 1) | ((HIGH_ONE
& *p
) >> 7);
685 octa2
= (MID_ONE
& *p
) >> 4;
686 octa3
= (LOW_ONE
& *p
) >> 1;
687 carry
= (CARRY_ONE
& *p
);
688 fprintf_filtered (stream
, "%o", octa1
);
689 fprintf_filtered (stream
, "%o", octa2
);
690 fprintf_filtered (stream
, "%o", octa3
);
694 /* Carry in, no carry out */
695 octa1
= (carry
<< 2) | ((HIGH_TWO
& *p
) >> 6);
696 octa2
= (MID_TWO
& *p
) >> 3;
697 octa3
= (LOW_TWO
& *p
);
699 fprintf_filtered (stream
, "%o", octa1
);
700 fprintf_filtered (stream
, "%o", octa2
);
701 fprintf_filtered (stream
, "%o", octa3
);
705 error (_("Internal error in octal conversion;"));
709 cycle
= cycle
% BITS_IN_OCTAL
;
715 /* VALADDR points to an integer of LEN bytes.
716 * Print it in decimal on stream or format it in buf.
719 print_decimal_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
723 #define TWO_TO_FOURTH 16
724 #define CARRY_OUT( x ) ((x) / TEN) /* extend char to int */
725 #define CARRY_LEFT( x ) ((x) % TEN)
726 #define SHIFT( x ) ((x) << 4)
728 ((gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) ? valaddr : valaddr + len - 1)
730 ((gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) ? (p < valaddr + len) : (p >= valaddr))
732 ((gdbarch_byte_order (current_gdbarch) == BFD_ENDIAN_BIG) ? p++ : p-- )
733 #define LOW_NIBBLE( x ) ( (x) & 0x00F)
734 #define HIGH_NIBBLE( x ) (((x) & 0x0F0) >> 4)
737 unsigned char *digits
;
740 int i
, j
, decimal_digits
;
744 /* Base-ten number is less than twice as many digits
745 * as the base 16 number, which is 2 digits per byte.
747 decimal_len
= len
* 2 * 2;
748 digits
= xmalloc (decimal_len
);
750 for (i
= 0; i
< decimal_len
; i
++)
755 /* Ok, we have an unknown number of bytes of data to be printed in
758 * Given a hex number (in nibbles) as XYZ, we start by taking X and
759 * decemalizing it as "x1 x2" in two decimal nibbles. Then we multiply
760 * the nibbles by 16, add Y and re-decimalize. Repeat with Z.
762 * The trick is that "digits" holds a base-10 number, but sometimes
763 * the individual digits are > 10.
765 * Outer loop is per nibble (hex digit) of input, from MSD end to
768 decimal_digits
= 0; /* Number of decimal digits so far */
774 * Multiply current base-ten number by 16 in place.
775 * Each digit was between 0 and 9, now is between
778 for (j
= 0; j
< decimal_digits
; j
++)
780 digits
[j
] = SHIFT (digits
[j
]);
783 /* Take the next nibble off the input and add it to what
784 * we've got in the LSB position. Bottom 'digit' is now
787 * "flip" is used to run this loop twice for each byte.
793 digits
[0] += HIGH_NIBBLE (*p
);
798 /* Take low nibble and bump our pointer "p".
800 digits
[0] += LOW_NIBBLE (*p
);
805 /* Re-decimalize. We have to do this often enough
806 * that we don't overflow, but once per nibble is
807 * overkill. Easier this way, though. Note that the
808 * carry is often larger than 10 (e.g. max initial
809 * carry out of lowest nibble is 15, could bubble all
810 * the way up greater than 10). So we have to do
811 * the carrying beyond the last current digit.
814 for (j
= 0; j
< decimal_len
- 1; j
++)
818 /* "/" won't handle an unsigned char with
819 * a value that if signed would be negative.
820 * So extend to longword int via "dummy".
823 carry
= CARRY_OUT (dummy
);
824 digits
[j
] = CARRY_LEFT (dummy
);
826 if (j
>= decimal_digits
&& carry
== 0)
829 * All higher digits are 0 and we
830 * no longer have a carry.
832 * Note: "j" is 0-based, "decimal_digits" is
835 decimal_digits
= j
+ 1;
841 /* Ok, now "digits" is the decimal representation, with
842 * the "decimal_digits" actual digits. Print!
844 for (i
= decimal_digits
- 1; i
>= 0; i
--)
846 fprintf_filtered (stream
, "%1d", digits
[i
]);
851 /* VALADDR points to an integer of LEN bytes. Print it in hex on stream. */
854 print_hex_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
859 /* FIXME: We should be not printing leading zeroes in most cases. */
861 fputs_filtered ("0x", stream
);
862 if (gdbarch_byte_order (current_gdbarch
) == BFD_ENDIAN_BIG
)
868 fprintf_filtered (stream
, "%02x", *p
);
873 for (p
= valaddr
+ len
- 1;
877 fprintf_filtered (stream
, "%02x", *p
);
882 /* VALADDR points to a char integer of LEN bytes. Print it out in appropriate language form on stream.
883 Omit any leading zero chars. */
886 print_char_chars (struct ui_file
*stream
, const gdb_byte
*valaddr
,
891 if (gdbarch_byte_order (current_gdbarch
) == BFD_ENDIAN_BIG
)
894 while (p
< valaddr
+ len
- 1 && *p
== 0)
897 while (p
< valaddr
+ len
)
899 LA_EMIT_CHAR (*p
, stream
, '\'');
905 p
= valaddr
+ len
- 1;
906 while (p
> valaddr
&& *p
== 0)
911 LA_EMIT_CHAR (*p
, stream
, '\'');
917 /* Return non-zero if the debugger should print the index of each element
918 when printing array values. */
921 print_array_indexes_p (void)
923 return print_array_indexes
;
926 /* Assuming TYPE is a simple, non-empty array type, compute its lower bound.
927 Save it into LOW_BOUND if not NULL.
929 Return 1 if the operation was successful. Return zero otherwise,
930 in which case the value of LOW_BOUND is unmodified.
932 Computing the array lower bound is pretty easy, but this function
933 does some additional verifications before returning the low bound.
934 If something incorrect is detected, it is better to return a status
935 rather than throwing an error, making it easier for the caller to
936 implement an error-recovery plan. For instance, it may decide to
937 warn the user that the bound was not found and then use a default
941 get_array_low_bound (struct type
*type
, long *low_bound
)
943 struct type
*index
= TYPE_INDEX_TYPE (type
);
949 if (TYPE_CODE (index
) != TYPE_CODE_RANGE
950 && TYPE_CODE (index
) != TYPE_CODE_ENUM
)
953 low
= TYPE_LOW_BOUND (index
);
954 if (low
> TYPE_HIGH_BOUND (index
))
963 /* Print on STREAM using the given FORMAT the index for the element
964 at INDEX of an array whose index type is INDEX_TYPE. */
967 maybe_print_array_index (struct type
*index_type
, LONGEST index
,
968 struct ui_file
*stream
, int format
,
969 enum val_prettyprint pretty
)
971 struct value
*index_value
;
973 if (!print_array_indexes
)
976 index_value
= value_from_longest (index_type
, index
);
978 LA_PRINT_ARRAY_INDEX (index_value
, stream
, format
, pretty
);
981 /* Called by various <lang>_val_print routines to print elements of an
982 array in the form "<elem1>, <elem2>, <elem3>, ...".
984 (FIXME?) Assumes array element separator is a comma, which is correct
985 for all languages currently handled.
986 (FIXME?) Some languages have a notation for repeated array elements,
987 perhaps we should try to use that notation when appropriate.
991 val_print_array_elements (struct type
*type
, const gdb_byte
*valaddr
,
992 CORE_ADDR address
, struct ui_file
*stream
,
993 int format
, int deref_ref
,
994 int recurse
, enum val_prettyprint pretty
,
997 unsigned int things_printed
= 0;
999 struct type
*elttype
, *index_type
;
1001 /* Position of the array element we are examining to see
1002 whether it is repeated. */
1004 /* Number of repetitions we have detected so far. */
1006 long low_bound_index
= 0;
1008 elttype
= TYPE_TARGET_TYPE (type
);
1009 eltlen
= TYPE_LENGTH (check_typedef (elttype
));
1010 len
= TYPE_LENGTH (type
) / eltlen
;
1011 index_type
= TYPE_INDEX_TYPE (type
);
1013 /* Get the array low bound. This only makes sense if the array
1014 has one or more element in it. */
1015 if (len
> 0 && !get_array_low_bound (type
, &low_bound_index
))
1017 warning ("unable to get low bound of array, using zero as default");
1018 low_bound_index
= 0;
1021 annotate_array_section_begin (i
, elttype
);
1023 for (; i
< len
&& things_printed
< print_max
; i
++)
1027 if (prettyprint_arrays
)
1029 fprintf_filtered (stream
, ",\n");
1030 print_spaces_filtered (2 + 2 * recurse
, stream
);
1034 fprintf_filtered (stream
, ", ");
1037 wrap_here (n_spaces (2 + 2 * recurse
));
1038 maybe_print_array_index (index_type
, i
+ low_bound_index
,
1039 stream
, format
, pretty
);
1043 while ((rep1
< len
) &&
1044 !memcmp (valaddr
+ i
* eltlen
, valaddr
+ rep1
* eltlen
, eltlen
))
1050 if (reps
> repeat_count_threshold
)
1052 val_print (elttype
, valaddr
+ i
* eltlen
, 0, 0, stream
, format
,
1053 deref_ref
, recurse
+ 1, pretty
);
1054 annotate_elt_rep (reps
);
1055 fprintf_filtered (stream
, " <repeats %u times>", reps
);
1056 annotate_elt_rep_end ();
1059 things_printed
+= repeat_count_threshold
;
1063 val_print (elttype
, valaddr
+ i
* eltlen
, 0, 0, stream
, format
,
1064 deref_ref
, recurse
+ 1, pretty
);
1069 annotate_array_section_end ();
1072 fprintf_filtered (stream
, "...");
1076 /* Read LEN bytes of target memory at address MEMADDR, placing the
1077 results in GDB's memory at MYADDR. Returns a count of the bytes
1078 actually read, and optionally an errno value in the location
1079 pointed to by ERRNOPTR if ERRNOPTR is non-null. */
1081 /* FIXME: cagney/1999-10-14: Only used by val_print_string. Can this
1082 function be eliminated. */
1085 partial_memory_read (CORE_ADDR memaddr
, gdb_byte
*myaddr
, int len
, int *errnoptr
)
1087 int nread
; /* Number of bytes actually read. */
1088 int errcode
; /* Error from last read. */
1090 /* First try a complete read. */
1091 errcode
= target_read_memory (memaddr
, myaddr
, len
);
1099 /* Loop, reading one byte at a time until we get as much as we can. */
1100 for (errcode
= 0, nread
= 0; len
> 0 && errcode
== 0; nread
++, len
--)
1102 errcode
= target_read_memory (memaddr
++, myaddr
++, 1);
1104 /* If an error, the last read was unsuccessful, so adjust count. */
1110 if (errnoptr
!= NULL
)
1112 *errnoptr
= errcode
;
1117 /* Print a string from the inferior, starting at ADDR and printing up to LEN
1118 characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing
1119 stops at the first null byte, otherwise printing proceeds (including null
1120 bytes) until either print_max or LEN characters have been printed,
1121 whichever is smaller. */
1123 /* FIXME: Use target_read_string. */
1126 val_print_string (CORE_ADDR addr
, int len
, int width
, struct ui_file
*stream
)
1128 int force_ellipsis
= 0; /* Force ellipsis to be printed if nonzero. */
1129 int errcode
; /* Errno returned from bad reads. */
1130 unsigned int fetchlimit
; /* Maximum number of chars to print. */
1131 unsigned int nfetch
; /* Chars to fetch / chars fetched. */
1132 unsigned int chunksize
; /* Size of each fetch, in chars. */
1133 gdb_byte
*buffer
= NULL
; /* Dynamically growable fetch buffer. */
1134 gdb_byte
*bufptr
; /* Pointer to next available byte in buffer. */
1135 gdb_byte
*limit
; /* First location past end of fetch buffer. */
1136 struct cleanup
*old_chain
= NULL
; /* Top of the old cleanup chain. */
1137 int found_nul
; /* Non-zero if we found the nul char */
1139 /* First we need to figure out the limit on the number of characters we are
1140 going to attempt to fetch and print. This is actually pretty simple. If
1141 LEN >= zero, then the limit is the minimum of LEN and print_max. If
1142 LEN is -1, then the limit is print_max. This is true regardless of
1143 whether print_max is zero, UINT_MAX (unlimited), or something in between,
1144 because finding the null byte (or available memory) is what actually
1145 limits the fetch. */
1147 fetchlimit
= (len
== -1 ? print_max
: min (len
, print_max
));
1149 /* Now decide how large of chunks to try to read in one operation. This
1150 is also pretty simple. If LEN >= zero, then we want fetchlimit chars,
1151 so we might as well read them all in one operation. If LEN is -1, we
1152 are looking for a null terminator to end the fetching, so we might as
1153 well read in blocks that are large enough to be efficient, but not so
1154 large as to be slow if fetchlimit happens to be large. So we choose the
1155 minimum of 8 and fetchlimit. We used to use 200 instead of 8 but
1156 200 is way too big for remote debugging over a serial line. */
1158 chunksize
= (len
== -1 ? min (8, fetchlimit
) : fetchlimit
);
1160 /* Loop until we either have all the characters to print, or we encounter
1161 some error, such as bumping into the end of the address space. */
1164 old_chain
= make_cleanup (null_cleanup
, 0);
1168 buffer
= (gdb_byte
*) xmalloc (len
* width
);
1170 old_chain
= make_cleanup (xfree
, buffer
);
1172 nfetch
= partial_memory_read (addr
, bufptr
, len
* width
, &errcode
)
1174 addr
+= nfetch
* width
;
1175 bufptr
+= nfetch
* width
;
1179 unsigned long bufsize
= 0;
1183 nfetch
= min (chunksize
, fetchlimit
- bufsize
);
1186 buffer
= (gdb_byte
*) xmalloc (nfetch
* width
);
1189 discard_cleanups (old_chain
);
1190 buffer
= (gdb_byte
*) xrealloc (buffer
, (nfetch
+ bufsize
) * width
);
1193 old_chain
= make_cleanup (xfree
, buffer
);
1194 bufptr
= buffer
+ bufsize
* width
;
1197 /* Read as much as we can. */
1198 nfetch
= partial_memory_read (addr
, bufptr
, nfetch
* width
, &errcode
)
1201 /* Scan this chunk for the null byte that terminates the string
1202 to print. If found, we don't need to fetch any more. Note
1203 that bufptr is explicitly left pointing at the next character
1204 after the null byte, or at the next character after the end of
1207 limit
= bufptr
+ nfetch
* width
;
1208 while (bufptr
< limit
)
1212 c
= extract_unsigned_integer (bufptr
, width
);
1217 /* We don't care about any error which happened after
1218 the NULL terminator. */
1225 while (errcode
== 0 /* no error */
1226 && bufptr
- buffer
< fetchlimit
* width
/* no overrun */
1227 && !found_nul
); /* haven't found nul yet */
1230 { /* length of string is really 0! */
1231 buffer
= bufptr
= NULL
;
1235 /* bufptr and addr now point immediately beyond the last byte which we
1236 consider part of the string (including a '\0' which ends the string). */
1238 /* We now have either successfully filled the buffer to fetchlimit, or
1239 terminated early due to an error or finding a null char when LEN is -1. */
1241 if (len
== -1 && !found_nul
)
1245 /* We didn't find a null terminator we were looking for. Attempt
1246 to peek at the next character. If not successful, or it is not
1247 a null byte, then force ellipsis to be printed. */
1249 peekbuf
= (gdb_byte
*) alloca (width
);
1251 if (target_read_memory (addr
, peekbuf
, width
) == 0
1252 && extract_unsigned_integer (peekbuf
, width
) != 0)
1255 else if ((len
>= 0 && errcode
!= 0) || (len
> (bufptr
- buffer
) / width
))
1257 /* Getting an error when we have a requested length, or fetching less
1258 than the number of characters actually requested, always make us
1265 /* If we get an error before fetching anything, don't print a string.
1266 But if we fetch something and then get an error, print the string
1267 and then the error message. */
1268 if (errcode
== 0 || bufptr
> buffer
)
1272 fputs_filtered (" ", stream
);
1274 LA_PRINT_STRING (stream
, buffer
, (bufptr
- buffer
) / width
, width
, force_ellipsis
);
1281 fprintf_filtered (stream
, " <Address ");
1282 deprecated_print_address_numeric (addr
, 1, stream
);
1283 fprintf_filtered (stream
, " out of bounds>");
1287 fprintf_filtered (stream
, " <Error reading address ");
1288 deprecated_print_address_numeric (addr
, 1, stream
);
1289 fprintf_filtered (stream
, ": %s>", safe_strerror (errcode
));
1293 do_cleanups (old_chain
);
1294 return ((bufptr
- buffer
) / width
);
1298 /* Validate an input or output radix setting, and make sure the user
1299 knows what they really did here. Radix setting is confusing, e.g.
1300 setting the input radix to "10" never changes it! */
1303 set_input_radix (char *args
, int from_tty
, struct cmd_list_element
*c
)
1305 set_input_radix_1 (from_tty
, input_radix
);
1309 set_input_radix_1 (int from_tty
, unsigned radix
)
1311 /* We don't currently disallow any input radix except 0 or 1, which don't
1312 make any mathematical sense. In theory, we can deal with any input
1313 radix greater than 1, even if we don't have unique digits for every
1314 value from 0 to radix-1, but in practice we lose on large radix values.
1315 We should either fix the lossage or restrict the radix range more.
1320 /* FIXME: cagney/2002-03-17: This needs to revert the bad radix
1322 error (_("Nonsense input radix ``decimal %u''; input radix unchanged."),
1325 input_radix
= radix
;
1328 printf_filtered (_("Input radix now set to decimal %u, hex %x, octal %o.\n"),
1329 radix
, radix
, radix
);
1334 set_output_radix (char *args
, int from_tty
, struct cmd_list_element
*c
)
1336 set_output_radix_1 (from_tty
, output_radix
);
1340 set_output_radix_1 (int from_tty
, unsigned radix
)
1342 /* Validate the radix and disallow ones that we aren't prepared to
1343 handle correctly, leaving the radix unchanged. */
1347 output_format
= 'x'; /* hex */
1350 output_format
= 0; /* decimal */
1353 output_format
= 'o'; /* octal */
1356 /* FIXME: cagney/2002-03-17: This needs to revert the bad radix
1358 error (_("Unsupported output radix ``decimal %u''; output radix unchanged."),
1361 output_radix
= radix
;
1364 printf_filtered (_("Output radix now set to decimal %u, hex %x, octal %o.\n"),
1365 radix
, radix
, radix
);
1369 /* Set both the input and output radix at once. Try to set the output radix
1370 first, since it has the most restrictive range. An radix that is valid as
1371 an output radix is also valid as an input radix.
1373 It may be useful to have an unusual input radix. If the user wishes to
1374 set an input radix that is not valid as an output radix, he needs to use
1375 the 'set input-radix' command. */
1378 set_radix (char *arg
, int from_tty
)
1382 radix
= (arg
== NULL
) ? 10 : parse_and_eval_long (arg
);
1383 set_output_radix_1 (0, radix
);
1384 set_input_radix_1 (0, radix
);
1387 printf_filtered (_("Input and output radices now set to decimal %u, hex %x, octal %o.\n"),
1388 radix
, radix
, radix
);
1392 /* Show both the input and output radices. */
1395 show_radix (char *arg
, int from_tty
)
1399 if (input_radix
== output_radix
)
1401 printf_filtered (_("Input and output radices set to decimal %u, hex %x, octal %o.\n"),
1402 input_radix
, input_radix
, input_radix
);
1406 printf_filtered (_("Input radix set to decimal %u, hex %x, octal %o.\n"),
1407 input_radix
, input_radix
, input_radix
);
1408 printf_filtered (_("Output radix set to decimal %u, hex %x, octal %o.\n"),
1409 output_radix
, output_radix
, output_radix
);
1416 set_print (char *arg
, int from_tty
)
1419 "\"set print\" must be followed by the name of a print subcommand.\n");
1420 help_list (setprintlist
, "set print ", -1, gdb_stdout
);
1424 show_print (char *args
, int from_tty
)
1426 cmd_show_list (showprintlist
, from_tty
, "");
1430 _initialize_valprint (void)
1432 struct cmd_list_element
*c
;
1434 add_prefix_cmd ("print", no_class
, set_print
,
1435 _("Generic command for setting how things print."),
1436 &setprintlist
, "set print ", 0, &setlist
);
1437 add_alias_cmd ("p", "print", no_class
, 1, &setlist
);
1438 /* prefer set print to set prompt */
1439 add_alias_cmd ("pr", "print", no_class
, 1, &setlist
);
1441 add_prefix_cmd ("print", no_class
, show_print
,
1442 _("Generic command for showing print settings."),
1443 &showprintlist
, "show print ", 0, &showlist
);
1444 add_alias_cmd ("p", "print", no_class
, 1, &showlist
);
1445 add_alias_cmd ("pr", "print", no_class
, 1, &showlist
);
1447 add_setshow_uinteger_cmd ("elements", no_class
, &print_max
, _("\
1448 Set limit on string chars or array elements to print."), _("\
1449 Show limit on string chars or array elements to print."), _("\
1450 \"set print elements 0\" causes there to be no limit."),
1453 &setprintlist
, &showprintlist
);
1455 add_setshow_boolean_cmd ("null-stop", no_class
, &stop_print_at_null
, _("\
1456 Set printing of char arrays to stop at first null char."), _("\
1457 Show printing of char arrays to stop at first null char."), NULL
,
1459 show_stop_print_at_null
,
1460 &setprintlist
, &showprintlist
);
1462 add_setshow_uinteger_cmd ("repeats", no_class
,
1463 &repeat_count_threshold
, _("\
1464 Set threshold for repeated print elements."), _("\
1465 Show threshold for repeated print elements."), _("\
1466 \"set print repeats 0\" causes all elements to be individually printed."),
1468 show_repeat_count_threshold
,
1469 &setprintlist
, &showprintlist
);
1471 add_setshow_boolean_cmd ("pretty", class_support
, &prettyprint_structs
, _("\
1472 Set prettyprinting of structures."), _("\
1473 Show prettyprinting of structures."), NULL
,
1475 show_prettyprint_structs
,
1476 &setprintlist
, &showprintlist
);
1478 add_setshow_boolean_cmd ("union", class_support
, &unionprint
, _("\
1479 Set printing of unions interior to structures."), _("\
1480 Show printing of unions interior to structures."), NULL
,
1483 &setprintlist
, &showprintlist
);
1485 add_setshow_boolean_cmd ("array", class_support
, &prettyprint_arrays
, _("\
1486 Set prettyprinting of arrays."), _("\
1487 Show prettyprinting of arrays."), NULL
,
1489 show_prettyprint_arrays
,
1490 &setprintlist
, &showprintlist
);
1492 add_setshow_boolean_cmd ("address", class_support
, &addressprint
, _("\
1493 Set printing of addresses."), _("\
1494 Show printing of addresses."), NULL
,
1497 &setprintlist
, &showprintlist
);
1499 add_setshow_uinteger_cmd ("input-radix", class_support
, &input_radix
, _("\
1500 Set default input radix for entering numbers."), _("\
1501 Show default input radix for entering numbers."), NULL
,
1504 &setlist
, &showlist
);
1506 add_setshow_uinteger_cmd ("output-radix", class_support
, &output_radix
, _("\
1507 Set default output radix for printing of values."), _("\
1508 Show default output radix for printing of values."), NULL
,
1511 &setlist
, &showlist
);
1513 /* The "set radix" and "show radix" commands are special in that
1514 they are like normal set and show commands but allow two normally
1515 independent variables to be either set or shown with a single
1516 command. So the usual deprecated_add_set_cmd() and [deleted]
1517 add_show_from_set() commands aren't really appropriate. */
1518 /* FIXME: i18n: With the new add_setshow_integer command, that is no
1519 longer true - show can display anything. */
1520 add_cmd ("radix", class_support
, set_radix
, _("\
1521 Set default input and output number radices.\n\
1522 Use 'set input-radix' or 'set output-radix' to independently set each.\n\
1523 Without an argument, sets both radices back to the default value of 10."),
1525 add_cmd ("radix", class_support
, show_radix
, _("\
1526 Show the default input and output number radices.\n\
1527 Use 'show input-radix' or 'show output-radix' to independently show each."),
1530 add_setshow_boolean_cmd ("array-indexes", class_support
,
1531 &print_array_indexes
, _("\
1532 Set printing of array indexes."), _("\
1533 Show printing of array indexes"), NULL
, NULL
, show_print_array_indexes
,
1534 &setprintlist
, &showprintlist
);
1536 /* Give people the defaults which they are used to. */
1537 prettyprint_structs
= 0;
1538 prettyprint_arrays
= 0;
1541 print_max
= PRINT_MAX_DEFAULT
;