1 /* Print values for GDB, the GNU debugger.
2 Copyright 1986, 1988, 1989, 1991-1994, 1998, 2000
3 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include "gdb_string.h"
38 /* Prototypes for local functions */
40 static int partial_memory_read (CORE_ADDR memaddr, char *myaddr,
41 int len, int *errnoptr);
43 static void print_hex_chars (struct ui_file *, unsigned char *,
46 static void show_print PARAMS ((char *, int));
48 static void set_print PARAMS ((char *, int));
50 static void set_radix PARAMS ((char *, int));
52 static void show_radix PARAMS ((char *, int));
54 static void set_input_radix PARAMS ((char *, int, struct cmd_list_element *));
56 static void set_input_radix_1 PARAMS ((int, unsigned));
58 static void set_output_radix PARAMS ((char *, int, struct cmd_list_element *));
60 static void set_output_radix_1 PARAMS ((int, unsigned));
62 void _initialize_valprint PARAMS ((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 /* Default input and output radixes, and output format letter. */
74 unsigned input_radix = 10;
75 unsigned output_radix = 10;
76 int output_format = 0;
78 /* Print repeat counts if there are more than this many repetitions of an
79 element in an array. Referenced by the low level language dependent
82 unsigned int repeat_count_threshold = 10;
84 /* If nonzero, stops printing of char arrays at first null. */
86 int stop_print_at_null;
88 /* Controls pretty printing of structures. */
90 int prettyprint_structs;
92 /* Controls pretty printing of arrays. */
94 int prettyprint_arrays;
96 /* If nonzero, causes unions inside structures or other unions to be
99 int unionprint; /* Controls printing of nested unions. */
101 /* If nonzero, causes machine addresses to be printed in certain contexts. */
103 int addressprint; /* Controls printing of machine addresses */
106 /* Print data of type TYPE located at VALADDR (within GDB), which came from
107 the inferior at address ADDRESS, onto stdio stream STREAM according to
108 FORMAT (a letter, or 0 for natural format using TYPE).
110 If DEREF_REF is nonzero, then dereference references, otherwise just print
113 The PRETTY parameter controls prettyprinting.
115 If the data are a string pointer, returns the number of string characters
118 FIXME: The data at VALADDR is in target byte order. If gdb is ever
119 enhanced to be able to debug more than the single target it was compiled
120 for (specific CPU type and thus specific target byte ordering), then
121 either the print routines are going to have to take this into account,
122 or the data is going to have to be passed into here already converted
123 to the host byte ordering, whichever is more convenient. */
127 val_print (type, valaddr, embedded_offset, address,
128 stream, format, deref_ref, recurse, pretty)
133 struct ui_file *stream;
137 enum val_prettyprint pretty;
139 struct type *real_type = check_typedef (type);
140 if (pretty == Val_pretty_default)
142 pretty = prettyprint_structs ? Val_prettyprint : Val_no_prettyprint;
147 /* Ensure that the type is complete and not just a stub. If the type is
148 only a stub and we can't find and substitute its complete type, then
149 print appropriate string and return. */
151 if (TYPE_FLAGS (real_type) & TYPE_FLAG_STUB)
153 fprintf_filtered (stream, "<incomplete type>");
158 return (LA_VAL_PRINT (type, valaddr, embedded_offset, address,
159 stream, format, deref_ref, recurse, pretty));
162 /* Print the value VAL in C-ish syntax on stream STREAM.
163 FORMAT is a format-letter, or 0 for print in natural format of data type.
164 If the object printed is a string pointer, returns
165 the number of string bytes printed. */
168 value_print (val, stream, format, pretty)
170 struct ui_file *stream;
172 enum val_prettyprint pretty;
176 printf_filtered ("<address of value unknown>");
179 if (VALUE_OPTIMIZED_OUT (val))
181 printf_filtered ("<value optimized out>");
184 return LA_VALUE_PRINT (val, stream, format, pretty);
187 /* Called by various <lang>_val_print routines to print
188 TYPE_CODE_INT's. TYPE is the type. VALADDR is the address of the
189 value. STREAM is where to print the value. */
192 val_print_type_code_int (type, valaddr, stream)
195 struct ui_file *stream;
197 if (TYPE_LENGTH (type) > sizeof (LONGEST))
201 if (TYPE_UNSIGNED (type)
202 && extract_long_unsigned_integer (valaddr, TYPE_LENGTH (type),
205 print_longest (stream, 'u', 0, val);
209 /* Signed, or we couldn't turn an unsigned value into a
210 LONGEST. For signed values, one could assume two's
211 complement (a reasonable assumption, I think) and do
213 print_hex_chars (stream, (unsigned char *) valaddr,
219 #ifdef PRINT_TYPELESS_INTEGER
220 PRINT_TYPELESS_INTEGER (stream, type, unpack_long (type, valaddr));
222 print_longest (stream, TYPE_UNSIGNED (type) ? 'u' : 'd', 0,
223 unpack_long (type, valaddr));
228 /* Print a number according to FORMAT which is one of d,u,x,o,b,h,w,g.
229 The raison d'etre of this function is to consolidate printing of
230 LONG_LONG's into this one function. Some platforms have long longs but
231 don't have a printf() that supports "ll" in the format string. We handle
232 these by seeing if the number is representable as either a signed or
233 unsigned long, depending upon what format is desired, and if not we just
234 bail out and print the number in hex.
236 The format chars b,h,w,g are from print_scalar_formatted(). If USE_LOCAL,
237 format it according to the current language (this should be used for most
238 integers which GDB prints, the exception is things like protocols where
239 the format of the integer is a protocol thing, not a user-visible thing).
242 #if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG)
243 static void print_decimal (struct ui_file * stream, char *sign,
244 int use_local, ULONGEST val_ulong);
246 print_decimal (stream, sign, use_local, val_ulong)
247 struct ui_file *stream;
252 unsigned long temp[3];
256 temp[i] = val_ulong % (1000 * 1000 * 1000);
257 val_ulong /= (1000 * 1000 * 1000);
260 while (val_ulong != 0 && i < (sizeof (temp) / sizeof (temp[0])));
264 fprintf_filtered (stream, "%s%lu",
268 fprintf_filtered (stream, "%s%lu%09lu",
269 sign, temp[1], temp[0]);
272 fprintf_filtered (stream, "%s%lu%09lu%09lu",
273 sign, temp[2], temp[1], temp[0]);
283 print_longest (stream, format, use_local, val_long)
284 struct ui_file *stream;
289 #if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG)
290 if (sizeof (long) < sizeof (LONGEST))
296 /* Print a signed value, that doesn't fit in a long */
297 if ((long) val_long != val_long)
300 print_decimal (stream, "-", use_local, -val_long);
302 print_decimal (stream, "", use_local, val_long);
309 /* Print an unsigned value, that doesn't fit in a long */
310 if ((unsigned long) val_long != (ULONGEST) val_long)
312 print_decimal (stream, "", use_local, val_long);
323 /* Print as unsigned value, must fit completely in unsigned long */
325 unsigned long temp = val_long;
326 if (temp != val_long)
328 /* Urk, can't represent value in long so print in hex.
329 Do shift in two operations so that if sizeof (long)
330 == sizeof (LONGEST) we can avoid warnings from
331 picky compilers about shifts >= the size of the
333 unsigned long vbot = (unsigned long) val_long;
334 LONGEST temp = (val_long >> (sizeof (long) * HOST_CHAR_BIT - 1));
335 unsigned long vtop = temp >> 1;
336 fprintf_filtered (stream, "0x%lx%08lx", vtop, vbot);
345 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
349 fprintf_filtered (stream,
350 use_local ? local_decimal_format_custom ("ll")
355 fprintf_filtered (stream, "%llu", val_long);
358 fprintf_filtered (stream,
359 use_local ? local_hex_format_custom ("ll")
364 fprintf_filtered (stream,
365 use_local ? local_octal_format_custom ("ll")
370 fprintf_filtered (stream, local_hex_format_custom ("02ll"), val_long);
373 fprintf_filtered (stream, local_hex_format_custom ("04ll"), val_long);
376 fprintf_filtered (stream, local_hex_format_custom ("08ll"), val_long);
379 fprintf_filtered (stream, local_hex_format_custom ("016ll"), val_long);
384 #else /* !CC_HAS_LONG_LONG || !PRINTF_HAS_LONG_LONG */
385 /* In the following it is important to coerce (val_long) to a long. It does
386 nothing if !LONG_LONG, but it will chop off the top half (which we know
387 we can ignore) if the host supports long longs. */
392 fprintf_filtered (stream,
393 use_local ? local_decimal_format_custom ("l")
398 fprintf_filtered (stream, "%lu", (unsigned long) val_long);
401 fprintf_filtered (stream,
402 use_local ? local_hex_format_custom ("l")
404 (unsigned long) val_long);
407 fprintf_filtered (stream,
408 use_local ? local_octal_format_custom ("l")
410 (unsigned long) val_long);
413 fprintf_filtered (stream, local_hex_format_custom ("02l"),
414 (unsigned long) val_long);
417 fprintf_filtered (stream, local_hex_format_custom ("04l"),
418 (unsigned long) val_long);
421 fprintf_filtered (stream, local_hex_format_custom ("08l"),
422 (unsigned long) val_long);
425 fprintf_filtered (stream, local_hex_format_custom ("016l"),
426 (unsigned long) val_long);
431 #endif /* CC_HAS_LONG_LONG || PRINTF_HAS_LONG_LONG */
436 strcat_longest (format, use_local, val_long, buf, buflen)
441 int buflen; /* ignored, for now */
443 #if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG)
446 vtop = val_long >> (sizeof (long) * HOST_CHAR_BIT);
447 vbot = (long) val_long;
449 if ((format == 'd' && (val_long < INT_MIN || val_long > INT_MAX))
450 || ((format == 'u' || format == 'x') && (unsigned long long) val_long > UINT_MAX))
452 sprintf (buf, "0x%lx%08lx", vtop, vbot);
457 #ifdef PRINTF_HAS_LONG_LONG
462 (use_local ? local_decimal_format_custom ("ll") : "%lld"),
466 sprintf (buf, "%llu", val_long);
470 (use_local ? local_hex_format_custom ("ll") : "%llx"),
476 (use_local ? local_octal_format_custom ("ll") : "%llo"),
480 sprintf (buf, local_hex_format_custom ("02ll"), val_long);
483 sprintf (buf, local_hex_format_custom ("04ll"), val_long);
486 sprintf (buf, local_hex_format_custom ("08ll"), val_long);
489 sprintf (buf, local_hex_format_custom ("016ll"), val_long);
494 #else /* !PRINTF_HAS_LONG_LONG */
495 /* In the following it is important to coerce (val_long) to a long. It does
496 nothing if !LONG_LONG, but it will chop off the top half (which we know
497 we can ignore) if the host supports long longs. */
502 sprintf (buf, (use_local ? local_decimal_format_custom ("l") : "%ld"),
506 sprintf (buf, "%lu", ((unsigned long) val_long));
509 sprintf (buf, (use_local ? local_hex_format_custom ("l") : "%lx"),
513 sprintf (buf, (use_local ? local_octal_format_custom ("l") : "%lo"),
517 sprintf (buf, local_hex_format_custom ("02l"),
521 sprintf (buf, local_hex_format_custom ("04l"),
525 sprintf (buf, local_hex_format_custom ("08l"),
529 sprintf (buf, local_hex_format_custom ("016l"),
536 #endif /* !PRINTF_HAS_LONG_LONG */
540 /* This used to be a macro, but I don't think it is called often enough
541 to merit such treatment. */
542 /* Convert a LONGEST to an int. This is used in contexts (e.g. number of
543 arguments to a function, number in a value history, register number, etc.)
544 where the value must not be larger than can fit in an int. */
550 /* Let the compiler do the work */
551 int rtnval = (int) arg;
553 /* Check for overflows or underflows */
554 if (sizeof (LONGEST) > sizeof (int))
558 error ("Value out of range.");
564 /* Print a floating point value of type TYPE, pointed to in GDB by VALADDR,
568 print_floating (valaddr, type, stream)
571 struct ui_file *stream;
575 unsigned len = TYPE_LENGTH (type);
577 #if defined (IEEE_FLOAT)
579 /* Check for NaN's. Note that this code does not depend on us being
580 on an IEEE conforming system. It only depends on the target
581 machine using IEEE representation. This means (a)
582 cross-debugging works right, and (2) IEEE_FLOAT can (and should)
583 be defined for systems like the 68881, which uses IEEE
584 representation, but is not IEEE conforming. */
587 unsigned long low, high;
588 /* Is the sign bit 0? */
590 /* Is it is a NaN (i.e. the exponent is all ones and
591 the fraction is nonzero)? */
594 /* For lint, initialize these two variables to suppress warning: */
595 low = high = nonnegative = 0;
598 /* It's single precision. */
599 /* Assume that floating point byte order is the same as
600 integer byte order. */
601 low = extract_unsigned_integer (valaddr, 4);
602 nonnegative = ((low & 0x80000000) == 0);
603 is_nan = ((((low >> 23) & 0xFF) == 0xFF)
604 && 0 != (low & 0x7FFFFF));
610 /* It's double precision. Get the high and low words. */
612 /* Assume that floating point byte order is the same as
613 integer byte order. */
614 if (TARGET_BYTE_ORDER == BIG_ENDIAN)
616 low = extract_unsigned_integer (valaddr + 4, 4);
617 high = extract_unsigned_integer (valaddr, 4);
621 low = extract_unsigned_integer (valaddr, 4);
622 high = extract_unsigned_integer (valaddr + 4, 4);
624 nonnegative = ((high & 0x80000000) == 0);
625 is_nan = (((high >> 20) & 0x7ff) == 0x7ff
626 && !((((high & 0xfffff) == 0)) && (low == 0)));
631 #ifdef TARGET_ANALYZE_FLOATING
632 TARGET_ANALYZE_FLOATING;
634 /* Extended. We can't detect extended NaNs for this target.
635 Also note that currently extendeds get nuked to double in
636 REGISTER_CONVERTIBLE. */
643 /* The meaning of the sign and fraction is not defined by IEEE.
644 But the user might know what they mean. For example, they
645 (in an implementation-defined manner) distinguish between
646 signaling and quiet NaN's. */
648 fprintf_filtered (stream, "-NaN(0x%lx%.8lx)" + !!nonnegative,
651 fprintf_filtered (stream, "-NaN(0x%lx)" + nonnegative, low);
655 #endif /* IEEE_FLOAT. */
657 doub = unpack_double (type, valaddr, &inv);
660 fprintf_filtered (stream, "<invalid float value>");
664 if (len < sizeof (double))
665 fprintf_filtered (stream, "%.9g", (double) doub);
666 else if (len == sizeof (double))
667 fprintf_filtered (stream, "%.17g", (double) doub);
669 #ifdef PRINTF_HAS_LONG_DOUBLE
670 fprintf_filtered (stream, "%.35Lg", doub);
672 /* This at least wins with values that are representable as doubles */
673 fprintf_filtered (stream, "%.17g", (double) doub);
678 print_binary_chars (stream, valaddr, len)
679 struct ui_file *stream;
680 unsigned char *valaddr;
684 #define BITS_IN_BYTES 8
690 /* Declared "int" so it will be signed.
691 * This ensures that right shift will shift in zeros.
693 const int mask = 0x080;
695 /* FIXME: We should be not printing leading zeroes in most cases. */
697 fprintf_filtered (stream, local_binary_format_prefix ());
698 if (TARGET_BYTE_ORDER == BIG_ENDIAN)
704 /* Every byte has 8 binary characters; peel off
705 * and print from the MSB end.
707 for (i = 0; i < (BITS_IN_BYTES * sizeof (*p)); i++)
709 if (*p & (mask >> i))
714 fprintf_filtered (stream, "%1d", b);
720 for (p = valaddr + len - 1;
724 for (i = 0; i < (BITS_IN_BYTES * sizeof (*p)); i++)
726 if (*p & (mask >> i))
731 fprintf_filtered (stream, "%1d", b);
735 fprintf_filtered (stream, local_binary_format_suffix ());
738 /* VALADDR points to an integer of LEN bytes.
739 * Print it in octal on stream or format it in buf.
742 print_octal_chars (stream, valaddr, len)
743 struct ui_file *stream;
744 unsigned char *valaddr;
748 unsigned char octa1, octa2, octa3, carry;
751 /* FIXME: We should be not printing leading zeroes in most cases. */
754 /* Octal is 3 bits, which doesn't fit. Yuk. So we have to track
755 * the extra bits, which cycle every three bytes:
759 * bit number 123 456 78 | 9 012 345 6 | 78 901 234 | 567 890 12 |
761 * Octal side: 0 1 carry 3 4 carry ...
763 * Cycle number: 0 1 2
765 * But of course we are printing from the high side, so we have to
766 * figure out where in the cycle we are so that we end up with no
767 * left over bits at the end.
769 #define BITS_IN_OCTAL 3
770 #define HIGH_ZERO 0340
771 #define LOW_ZERO 0016
772 #define CARRY_ZERO 0003
773 #define HIGH_ONE 0200
776 #define CARRY_ONE 0001
777 #define HIGH_TWO 0300
781 /* For 32 we start in cycle 2, with two bits and one bit carry;
782 * for 64 in cycle in cycle 1, with one bit and a two bit carry.
784 cycle = (len * BITS_IN_BYTES) % BITS_IN_OCTAL;
787 fprintf_filtered (stream, local_octal_format_prefix ());
788 if (TARGET_BYTE_ORDER == BIG_ENDIAN)
797 /* No carry in, carry out two bits.
799 octa1 = (HIGH_ZERO & *p) >> 5;
800 octa2 = (LOW_ZERO & *p) >> 2;
801 carry = (CARRY_ZERO & *p);
802 fprintf_filtered (stream, "%o", octa1);
803 fprintf_filtered (stream, "%o", octa2);
807 /* Carry in two bits, carry out one bit.
809 octa1 = (carry << 1) | ((HIGH_ONE & *p) >> 7);
810 octa2 = (MID_ONE & *p) >> 4;
811 octa3 = (LOW_ONE & *p) >> 1;
812 carry = (CARRY_ONE & *p);
813 fprintf_filtered (stream, "%o", octa1);
814 fprintf_filtered (stream, "%o", octa2);
815 fprintf_filtered (stream, "%o", octa3);
819 /* Carry in one bit, no carry out.
821 octa1 = (carry << 2) | ((HIGH_TWO & *p) >> 6);
822 octa2 = (MID_TWO & *p) >> 3;
823 octa3 = (LOW_TWO & *p);
825 fprintf_filtered (stream, "%o", octa1);
826 fprintf_filtered (stream, "%o", octa2);
827 fprintf_filtered (stream, "%o", octa3);
831 error ("Internal error in octal conversion;");
835 cycle = cycle % BITS_IN_OCTAL;
840 for (p = valaddr + len - 1;
847 /* Carry out, no carry in */
848 octa1 = (HIGH_ZERO & *p) >> 5;
849 octa2 = (LOW_ZERO & *p) >> 2;
850 carry = (CARRY_ZERO & *p);
851 fprintf_filtered (stream, "%o", octa1);
852 fprintf_filtered (stream, "%o", octa2);
856 /* Carry in, carry out */
857 octa1 = (carry << 1) | ((HIGH_ONE & *p) >> 7);
858 octa2 = (MID_ONE & *p) >> 4;
859 octa3 = (LOW_ONE & *p) >> 1;
860 carry = (CARRY_ONE & *p);
861 fprintf_filtered (stream, "%o", octa1);
862 fprintf_filtered (stream, "%o", octa2);
863 fprintf_filtered (stream, "%o", octa3);
867 /* Carry in, no carry out */
868 octa1 = (carry << 2) | ((HIGH_TWO & *p) >> 6);
869 octa2 = (MID_TWO & *p) >> 3;
870 octa3 = (LOW_TWO & *p);
872 fprintf_filtered (stream, "%o", octa1);
873 fprintf_filtered (stream, "%o", octa2);
874 fprintf_filtered (stream, "%o", octa3);
878 error ("Internal error in octal conversion;");
882 cycle = cycle % BITS_IN_OCTAL;
886 fprintf_filtered (stream, local_octal_format_suffix ());
889 /* VALADDR points to an integer of LEN bytes.
890 * Print it in decimal on stream or format it in buf.
893 print_decimal_chars (stream, valaddr, len)
894 struct ui_file *stream;
895 unsigned char *valaddr;
899 #define TWO_TO_FOURTH 16
900 #define CARRY_OUT( x ) ((x) / TEN) /* extend char to int */
901 #define CARRY_LEFT( x ) ((x) % TEN)
902 #define SHIFT( x ) ((x) << 4)
904 ((TARGET_BYTE_ORDER == BIG_ENDIAN) ? valaddr : valaddr + len - 1)
906 ((TARGET_BYTE_ORDER == BIG_ENDIAN) ? (p < valaddr + len) : (p >= valaddr))
908 ((TARGET_BYTE_ORDER == BIG_ENDIAN) ? p++ : p-- )
909 #define LOW_NIBBLE( x ) ( (x) & 0x00F)
910 #define HIGH_NIBBLE( x ) (((x) & 0x0F0) >> 4)
913 unsigned char *digits;
916 int i, j, decimal_digits;
920 /* Base-ten number is less than twice as many digits
921 * as the base 16 number, which is 2 digits per byte.
923 decimal_len = len * 2 * 2;
924 digits = (unsigned char *) malloc (decimal_len);
926 error ("Can't allocate memory for conversion to decimal.");
928 for (i = 0; i < decimal_len; i++)
933 fprintf_filtered (stream, local_decimal_format_prefix ());
935 /* Ok, we have an unknown number of bytes of data to be printed in
938 * Given a hex number (in nibbles) as XYZ, we start by taking X and
939 * decemalizing it as "x1 x2" in two decimal nibbles. Then we multiply
940 * the nibbles by 16, add Y and re-decimalize. Repeat with Z.
942 * The trick is that "digits" holds a base-10 number, but sometimes
943 * the individual digits are > 10.
945 * Outer loop is per nibble (hex digit) of input, from MSD end to
948 decimal_digits = 0; /* Number of decimal digits so far */
954 * Multiply current base-ten number by 16 in place.
955 * Each digit was between 0 and 9, now is between
958 for (j = 0; j < decimal_digits; j++)
960 digits[j] = SHIFT (digits[j]);
963 /* Take the next nibble off the input and add it to what
964 * we've got in the LSB position. Bottom 'digit' is now
967 * "flip" is used to run this loop twice for each byte.
973 digits[0] += HIGH_NIBBLE (*p);
978 /* Take low nibble and bump our pointer "p".
980 digits[0] += LOW_NIBBLE (*p);
985 /* Re-decimalize. We have to do this often enough
986 * that we don't overflow, but once per nibble is
987 * overkill. Easier this way, though. Note that the
988 * carry is often larger than 10 (e.g. max initial
989 * carry out of lowest nibble is 15, could bubble all
990 * the way up greater than 10). So we have to do
991 * the carrying beyond the last current digit.
994 for (j = 0; j < decimal_len - 1; j++)
998 /* "/" won't handle an unsigned char with
999 * a value that if signed would be negative.
1000 * So extend to longword int via "dummy".
1003 carry = CARRY_OUT (dummy);
1004 digits[j] = CARRY_LEFT (dummy);
1006 if (j >= decimal_digits && carry == 0)
1009 * All higher digits are 0 and we
1010 * no longer have a carry.
1012 * Note: "j" is 0-based, "decimal_digits" is
1015 decimal_digits = j + 1;
1021 /* Ok, now "digits" is the decimal representation, with
1022 * the "decimal_digits" actual digits. Print!
1024 for (i = decimal_digits - 1; i >= 0; i--)
1026 fprintf_filtered (stream, "%1d", digits[i]);
1030 fprintf_filtered (stream, local_decimal_format_suffix ());
1033 /* VALADDR points to an integer of LEN bytes. Print it in hex on stream. */
1036 print_hex_chars (stream, valaddr, len)
1037 struct ui_file *stream;
1038 unsigned char *valaddr;
1043 /* FIXME: We should be not printing leading zeroes in most cases. */
1045 fprintf_filtered (stream, local_hex_format_prefix ());
1046 if (TARGET_BYTE_ORDER == BIG_ENDIAN)
1052 fprintf_filtered (stream, "%02x", *p);
1057 for (p = valaddr + len - 1;
1061 fprintf_filtered (stream, "%02x", *p);
1064 fprintf_filtered (stream, local_hex_format_suffix ());
1067 /* Called by various <lang>_val_print routines to print elements of an
1068 array in the form "<elem1>, <elem2>, <elem3>, ...".
1070 (FIXME?) Assumes array element separator is a comma, which is correct
1071 for all languages currently handled.
1072 (FIXME?) Some languages have a notation for repeated array elements,
1073 perhaps we should try to use that notation when appropriate.
1077 val_print_array_elements (type, valaddr, address, stream, format, deref_ref,
1082 struct ui_file *stream;
1086 enum val_prettyprint pretty;
1089 unsigned int things_printed = 0;
1091 struct type *elttype;
1093 /* Position of the array element we are examining to see
1094 whether it is repeated. */
1096 /* Number of repetitions we have detected so far. */
1099 elttype = TYPE_TARGET_TYPE (type);
1100 eltlen = TYPE_LENGTH (check_typedef (elttype));
1101 len = TYPE_LENGTH (type) / eltlen;
1103 annotate_array_section_begin (i, elttype);
1105 for (; i < len && things_printed < print_max; i++)
1109 if (prettyprint_arrays)
1111 fprintf_filtered (stream, ",\n");
1112 print_spaces_filtered (2 + 2 * recurse, stream);
1116 fprintf_filtered (stream, ", ");
1119 wrap_here (n_spaces (2 + 2 * recurse));
1123 while ((rep1 < len) &&
1124 !memcmp (valaddr + i * eltlen, valaddr + rep1 * eltlen, eltlen))
1130 if (reps > repeat_count_threshold)
1132 val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format,
1133 deref_ref, recurse + 1, pretty);
1134 annotate_elt_rep (reps);
1135 fprintf_filtered (stream, " <repeats %u times>", reps);
1136 annotate_elt_rep_end ();
1139 things_printed += repeat_count_threshold;
1143 val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format,
1144 deref_ref, recurse + 1, pretty);
1149 annotate_array_section_end ();
1152 fprintf_filtered (stream, "...");
1156 /* Read LEN bytes of target memory at address MEMADDR, placing the
1157 results in GDB's memory at MYADDR. Returns a count of the bytes
1158 actually read, and optionally an errno value in the location
1159 pointed to by ERRNOPTR if ERRNOPTR is non-null. */
1161 /* FIXME: cagney/1999-10-14: Only used by val_print_string. Can this
1162 function be eliminated. */
1165 partial_memory_read (CORE_ADDR memaddr, char *myaddr, int len, int *errnoptr)
1167 int nread; /* Number of bytes actually read. */
1168 int errcode; /* Error from last read. */
1170 /* First try a complete read. */
1171 errcode = target_read_memory (memaddr, myaddr, len);
1179 /* Loop, reading one byte at a time until we get as much as we can. */
1180 for (errcode = 0, nread = 0; len > 0 && errcode == 0; nread++, len--)
1182 errcode = target_read_memory (memaddr++, myaddr++, 1);
1184 /* If an error, the last read was unsuccessful, so adjust count. */
1190 if (errnoptr != NULL)
1192 *errnoptr = errcode;
1197 /* Print a string from the inferior, starting at ADDR and printing up to LEN
1198 characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing
1199 stops at the first null byte, otherwise printing proceeds (including null
1200 bytes) until either print_max or LEN characters have been printed,
1201 whichever is smaller. */
1203 /* FIXME: Use target_read_string. */
1206 val_print_string (addr, len, width, stream)
1210 struct ui_file *stream;
1212 int force_ellipsis = 0; /* Force ellipsis to be printed if nonzero. */
1213 int errcode; /* Errno returned from bad reads. */
1214 unsigned int fetchlimit; /* Maximum number of chars to print. */
1215 unsigned int nfetch; /* Chars to fetch / chars fetched. */
1216 unsigned int chunksize; /* Size of each fetch, in chars. */
1217 char *buffer = NULL; /* Dynamically growable fetch buffer. */
1218 char *bufptr; /* Pointer to next available byte in buffer. */
1219 char *limit; /* First location past end of fetch buffer. */
1220 struct cleanup *old_chain = NULL; /* Top of the old cleanup chain. */
1221 int found_nul; /* Non-zero if we found the nul char */
1223 /* First we need to figure out the limit on the number of characters we are
1224 going to attempt to fetch and print. This is actually pretty simple. If
1225 LEN >= zero, then the limit is the minimum of LEN and print_max. If
1226 LEN is -1, then the limit is print_max. This is true regardless of
1227 whether print_max is zero, UINT_MAX (unlimited), or something in between,
1228 because finding the null byte (or available memory) is what actually
1229 limits the fetch. */
1231 fetchlimit = (len == -1 ? print_max : min (len, print_max));
1233 /* Now decide how large of chunks to try to read in one operation. This
1234 is also pretty simple. If LEN >= zero, then we want fetchlimit chars,
1235 so we might as well read them all in one operation. If LEN is -1, we
1236 are looking for a null terminator to end the fetching, so we might as
1237 well read in blocks that are large enough to be efficient, but not so
1238 large as to be slow if fetchlimit happens to be large. So we choose the
1239 minimum of 8 and fetchlimit. We used to use 200 instead of 8 but
1240 200 is way too big for remote debugging over a serial line. */
1242 chunksize = (len == -1 ? min (8, fetchlimit) : fetchlimit);
1244 /* Loop until we either have all the characters to print, or we encounter
1245 some error, such as bumping into the end of the address space. */
1248 old_chain = make_cleanup (null_cleanup, 0);
1252 buffer = (char *) xmalloc (len * width);
1254 old_chain = make_cleanup (free, buffer);
1256 nfetch = partial_memory_read (addr, bufptr, len * width, &errcode)
1258 addr += nfetch * width;
1259 bufptr += nfetch * width;
1263 unsigned long bufsize = 0;
1267 nfetch = min (chunksize, fetchlimit - bufsize);
1270 buffer = (char *) xmalloc (nfetch * width);
1273 discard_cleanups (old_chain);
1274 buffer = (char *) xrealloc (buffer, (nfetch + bufsize) * width);
1277 old_chain = make_cleanup (free, buffer);
1278 bufptr = buffer + bufsize * width;
1281 /* Read as much as we can. */
1282 nfetch = partial_memory_read (addr, bufptr, nfetch * width, &errcode)
1285 /* Scan this chunk for the null byte that terminates the string
1286 to print. If found, we don't need to fetch any more. Note
1287 that bufptr is explicitly left pointing at the next character
1288 after the null byte, or at the next character after the end of
1291 limit = bufptr + nfetch * width;
1292 while (bufptr < limit)
1296 c = extract_unsigned_integer (bufptr, width);
1301 /* We don't care about any error which happened after
1302 the NULL terminator. */
1309 while (errcode == 0 /* no error */
1310 && bufptr - buffer < fetchlimit * width /* no overrun */
1311 && !found_nul); /* haven't found nul yet */
1314 { /* length of string is really 0! */
1315 buffer = bufptr = NULL;
1319 /* bufptr and addr now point immediately beyond the last byte which we
1320 consider part of the string (including a '\0' which ends the string). */
1322 /* We now have either successfully filled the buffer to fetchlimit, or
1323 terminated early due to an error or finding a null char when LEN is -1. */
1325 if (len == -1 && !found_nul)
1329 /* We didn't find a null terminator we were looking for. Attempt
1330 to peek at the next character. If not successful, or it is not
1331 a null byte, then force ellipsis to be printed. */
1333 peekbuf = (char *) alloca (width);
1335 if (target_read_memory (addr, peekbuf, width) == 0
1336 && extract_unsigned_integer (peekbuf, width) != 0)
1339 else if ((len >= 0 && errcode != 0) || (len > (bufptr - buffer) / width))
1341 /* Getting an error when we have a requested length, or fetching less
1342 than the number of characters actually requested, always make us
1349 /* If we get an error before fetching anything, don't print a string.
1350 But if we fetch something and then get an error, print the string
1351 and then the error message. */
1352 if (errcode == 0 || bufptr > buffer)
1356 fputs_filtered (" ", stream);
1358 LA_PRINT_STRING (stream, buffer, (bufptr - buffer) / width, width, force_ellipsis);
1365 fprintf_filtered (stream, " <Address ");
1366 print_address_numeric (addr, 1, stream);
1367 fprintf_filtered (stream, " out of bounds>");
1371 fprintf_filtered (stream, " <Error reading address ");
1372 print_address_numeric (addr, 1, stream);
1373 fprintf_filtered (stream, ": %s>", safe_strerror (errcode));
1377 do_cleanups (old_chain);
1378 return ((bufptr - buffer) / width);
1382 /* Validate an input or output radix setting, and make sure the user
1383 knows what they really did here. Radix setting is confusing, e.g.
1384 setting the input radix to "10" never changes it! */
1388 set_input_radix (args, from_tty, c)
1391 struct cmd_list_element *c;
1393 set_input_radix_1 (from_tty, *(unsigned *) c->var);
1398 set_input_radix_1 (from_tty, radix)
1402 /* We don't currently disallow any input radix except 0 or 1, which don't
1403 make any mathematical sense. In theory, we can deal with any input
1404 radix greater than 1, even if we don't have unique digits for every
1405 value from 0 to radix-1, but in practice we lose on large radix values.
1406 We should either fix the lossage or restrict the radix range more.
1411 error ("Nonsense input radix ``decimal %u''; input radix unchanged.",
1414 input_radix = radix;
1417 printf_filtered ("Input radix now set to decimal %u, hex %x, octal %o.\n",
1418 radix, radix, radix);
1424 set_output_radix (args, from_tty, c)
1427 struct cmd_list_element *c;
1429 set_output_radix_1 (from_tty, *(unsigned *) c->var);
1433 set_output_radix_1 (from_tty, radix)
1437 /* Validate the radix and disallow ones that we aren't prepared to
1438 handle correctly, leaving the radix unchanged. */
1442 output_format = 'x'; /* hex */
1445 output_format = 0; /* decimal */
1448 output_format = 'o'; /* octal */
1451 error ("Unsupported output radix ``decimal %u''; output radix unchanged.",
1454 output_radix = radix;
1457 printf_filtered ("Output radix now set to decimal %u, hex %x, octal %o.\n",
1458 radix, radix, radix);
1462 /* Set both the input and output radix at once. Try to set the output radix
1463 first, since it has the most restrictive range. An radix that is valid as
1464 an output radix is also valid as an input radix.
1466 It may be useful to have an unusual input radix. If the user wishes to
1467 set an input radix that is not valid as an output radix, he needs to use
1468 the 'set input-radix' command. */
1471 set_radix (arg, from_tty)
1477 radix = (arg == NULL) ? 10 : parse_and_eval_address (arg);
1478 set_output_radix_1 (0, radix);
1479 set_input_radix_1 (0, radix);
1482 printf_filtered ("Input and output radices now set to decimal %u, hex %x, octal %o.\n",
1483 radix, radix, radix);
1487 /* Show both the input and output radices. */
1491 show_radix (arg, from_tty)
1497 if (input_radix == output_radix)
1499 printf_filtered ("Input and output radices set to decimal %u, hex %x, octal %o.\n",
1500 input_radix, input_radix, input_radix);
1504 printf_filtered ("Input radix set to decimal %u, hex %x, octal %o.\n",
1505 input_radix, input_radix, input_radix);
1506 printf_filtered ("Output radix set to decimal %u, hex %x, octal %o.\n",
1507 output_radix, output_radix, output_radix);
1515 set_print (arg, from_tty)
1520 "\"set print\" must be followed by the name of a print subcommand.\n");
1521 help_list (setprintlist, "set print ", -1, gdb_stdout);
1526 show_print (args, from_tty)
1530 cmd_show_list (showprintlist, from_tty, "");
1534 _initialize_valprint ()
1536 struct cmd_list_element *c;
1538 add_prefix_cmd ("print", no_class, set_print,
1539 "Generic command for setting how things print.",
1540 &setprintlist, "set print ", 0, &setlist);
1541 add_alias_cmd ("p", "print", no_class, 1, &setlist);
1542 /* prefer set print to set prompt */
1543 add_alias_cmd ("pr", "print", no_class, 1, &setlist);
1545 add_prefix_cmd ("print", no_class, show_print,
1546 "Generic command for showing print settings.",
1547 &showprintlist, "show print ", 0, &showlist);
1548 add_alias_cmd ("p", "print", no_class, 1, &showlist);
1549 add_alias_cmd ("pr", "print", no_class, 1, &showlist);
1552 (add_set_cmd ("elements", no_class, var_uinteger, (char *) &print_max,
1553 "Set limit on string chars or array elements to print.\n\
1554 \"set print elements 0\" causes there to be no limit.",
1559 (add_set_cmd ("null-stop", no_class, var_boolean,
1560 (char *) &stop_print_at_null,
1561 "Set printing of char arrays to stop at first null char.",
1566 (add_set_cmd ("repeats", no_class, var_uinteger,
1567 (char *) &repeat_count_threshold,
1568 "Set threshold for repeated print elements.\n\
1569 \"set print repeats 0\" causes all elements to be individually printed.",
1574 (add_set_cmd ("pretty", class_support, var_boolean,
1575 (char *) &prettyprint_structs,
1576 "Set prettyprinting of structures.",
1581 (add_set_cmd ("union", class_support, var_boolean, (char *) &unionprint,
1582 "Set printing of unions interior to structures.",
1587 (add_set_cmd ("array", class_support, var_boolean,
1588 (char *) &prettyprint_arrays,
1589 "Set prettyprinting of arrays.",
1594 (add_set_cmd ("address", class_support, var_boolean, (char *) &addressprint,
1595 "Set printing of addresses.",
1599 c = add_set_cmd ("input-radix", class_support, var_uinteger,
1600 (char *) &input_radix,
1601 "Set default input radix for entering numbers.",
1603 add_show_from_set (c, &showlist);
1604 c->function.sfunc = set_input_radix;
1606 c = add_set_cmd ("output-radix", class_support, var_uinteger,
1607 (char *) &output_radix,
1608 "Set default output radix for printing of values.",
1610 add_show_from_set (c, &showlist);
1611 c->function.sfunc = set_output_radix;
1613 /* The "set radix" and "show radix" commands are special in that they are
1614 like normal set and show commands but allow two normally independent
1615 variables to be either set or shown with a single command. So the
1616 usual add_set_cmd() and add_show_from_set() commands aren't really
1618 add_cmd ("radix", class_support, set_radix,
1619 "Set default input and output number radices.\n\
1620 Use 'set input-radix' or 'set output-radix' to independently set each.\n\
1621 Without an argument, sets both radices back to the default value of 10.",
1623 add_cmd ("radix", class_support, show_radix,
1624 "Show the default input and output number radices.\n\
1625 Use 'show input-radix' or 'show output-radix' to independently show each.",
1628 /* Give people the defaults which they are used to. */
1629 prettyprint_structs = 0;
1630 prettyprint_arrays = 0;
1633 print_max = PRINT_MAX_DEFAULT;