1 /* Print values for GDB, the GNU debugger.
2 Copyright 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1998
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 PARAMS ((GDB_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)
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)
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)
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 PARAMS ((GDB_FILE * stream, char *sign, int use_local, ULONGEST val_ulong));
245 print_decimal (stream, sign, use_local, val_ulong)
251 unsigned long temp[3];
255 temp[i] = val_ulong % (1000 * 1000 * 1000);
256 val_ulong /= (1000 * 1000 * 1000);
259 while (val_ulong != 0 && i < (sizeof (temp) / sizeof (temp[0])));
263 fprintf_filtered (stream, "%s%lu",
267 fprintf_filtered (stream, "%s%lu%09lu",
268 sign, temp[1], temp[0]);
271 fprintf_filtered (stream, "%s%lu%09lu%09lu",
272 sign, temp[2], temp[1], temp[0]);
282 print_longest (stream, format, use_local, val_long)
288 #if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG)
289 if (sizeof (long) < sizeof (LONGEST))
295 /* Print a signed value, that doesn't fit in a long */
296 if ((long) val_long != val_long)
299 print_decimal (stream, "-", use_local, -val_long);
301 print_decimal (stream, "", use_local, val_long);
308 /* Print an unsigned value, that doesn't fit in a long */
309 if ((unsigned long) val_long != (ULONGEST) val_long)
311 print_decimal (stream, "", use_local, val_long);
322 /* Print as unsigned value, must fit completely in unsigned long */
324 unsigned long temp = val_long;
325 if (temp != val_long)
327 /* Urk, can't represent value in long so print in hex.
328 Do shift in two operations so that if sizeof (long)
329 == sizeof (LONGEST) we can avoid warnings from
330 picky compilers about shifts >= the size of the
332 unsigned long vbot = (unsigned long) val_long;
333 LONGEST temp = (val_long >> (sizeof (long) * HOST_CHAR_BIT - 1));
334 unsigned long vtop = temp >> 1;
335 fprintf_filtered (stream, "0x%lx%08lx", vtop, vbot);
344 #if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG)
348 fprintf_filtered (stream,
349 use_local ? local_decimal_format_custom ("ll")
354 fprintf_filtered (stream, "%llu", val_long);
357 fprintf_filtered (stream,
358 use_local ? local_hex_format_custom ("ll")
363 fprintf_filtered (stream,
364 use_local ? local_octal_format_custom ("ll")
369 fprintf_filtered (stream, local_hex_format_custom ("02ll"), val_long);
372 fprintf_filtered (stream, local_hex_format_custom ("04ll"), val_long);
375 fprintf_filtered (stream, local_hex_format_custom ("08ll"), val_long);
378 fprintf_filtered (stream, local_hex_format_custom ("016ll"), val_long);
383 #else /* !CC_HAS_LONG_LONG || !PRINTF_HAS_LONG_LONG */
384 /* In the following it is important to coerce (val_long) to a long. It does
385 nothing if !LONG_LONG, but it will chop off the top half (which we know
386 we can ignore) if the host supports long longs. */
391 fprintf_filtered (stream,
392 use_local ? local_decimal_format_custom ("l")
397 fprintf_filtered (stream, "%lu", (unsigned long) val_long);
400 fprintf_filtered (stream,
401 use_local ? local_hex_format_custom ("l")
403 (unsigned long) val_long);
406 fprintf_filtered (stream,
407 use_local ? local_octal_format_custom ("l")
409 (unsigned long) val_long);
412 fprintf_filtered (stream, local_hex_format_custom ("02l"),
413 (unsigned long) val_long);
416 fprintf_filtered (stream, local_hex_format_custom ("04l"),
417 (unsigned long) val_long);
420 fprintf_filtered (stream, local_hex_format_custom ("08l"),
421 (unsigned long) val_long);
424 fprintf_filtered (stream, local_hex_format_custom ("016l"),
425 (unsigned long) val_long);
430 #endif /* CC_HAS_LONG_LONG || PRINTF_HAS_LONG_LONG */
435 strcat_longest (format, use_local, val_long, buf, buflen)
440 int buflen; /* ignored, for now */
442 #if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG)
445 vtop = val_long >> (sizeof (long) * HOST_CHAR_BIT);
446 vbot = (long) val_long;
448 if ((format == 'd' && (val_long < INT_MIN || val_long > INT_MAX))
449 || ((format == 'u' || format == 'x') && (unsigned long long) val_long > UINT_MAX))
451 sprintf (buf, "0x%lx%08lx", vtop, vbot);
456 #ifdef PRINTF_HAS_LONG_LONG
461 (use_local ? local_decimal_format_custom ("ll") : "%lld"),
465 sprintf (buf, "%llu", val_long);
469 (use_local ? local_hex_format_custom ("ll") : "%llx"),
475 (use_local ? local_octal_format_custom ("ll") : "%llo"),
479 sprintf (buf, local_hex_format_custom ("02ll"), val_long);
482 sprintf (buf, local_hex_format_custom ("04ll"), val_long);
485 sprintf (buf, local_hex_format_custom ("08ll"), val_long);
488 sprintf (buf, local_hex_format_custom ("016ll"), val_long);
493 #else /* !PRINTF_HAS_LONG_LONG */
494 /* In the following it is important to coerce (val_long) to a long. It does
495 nothing if !LONG_LONG, but it will chop off the top half (which we know
496 we can ignore) if the host supports long longs. */
501 sprintf (buf, (use_local ? local_decimal_format_custom ("l") : "%ld"),
505 sprintf (buf, "%lu", ((unsigned long) val_long));
508 sprintf (buf, (use_local ? local_hex_format_custom ("l") : "%lx"),
512 sprintf (buf, (use_local ? local_octal_format_custom ("l") : "%lo"),
516 sprintf (buf, local_hex_format_custom ("02l"),
520 sprintf (buf, local_hex_format_custom ("04l"),
524 sprintf (buf, local_hex_format_custom ("08l"),
528 sprintf (buf, local_hex_format_custom ("016l"),
535 #endif /* !PRINTF_HAS_LONG_LONG */
539 /* This used to be a macro, but I don't think it is called often enough
540 to merit such treatment. */
541 /* Convert a LONGEST to an int. This is used in contexts (e.g. number of
542 arguments to a function, number in a value history, register number, etc.)
543 where the value must not be larger than can fit in an int. */
549 /* Let the compiler do the work */
550 int rtnval = (int) arg;
552 /* Check for overflows or underflows */
553 if (sizeof (LONGEST) > sizeof (int))
557 error ("Value out of range.");
563 /* Print a floating point value of type TYPE, pointed to in GDB by VALADDR,
567 print_floating (valaddr, type, stream)
574 unsigned len = TYPE_LENGTH (type);
576 #if defined (IEEE_FLOAT)
578 /* Check for NaN's. Note that this code does not depend on us being
579 on an IEEE conforming system. It only depends on the target
580 machine using IEEE representation. This means (a)
581 cross-debugging works right, and (2) IEEE_FLOAT can (and should)
582 be defined for systems like the 68881, which uses IEEE
583 representation, but is not IEEE conforming. */
586 unsigned long low, high;
587 /* Is the sign bit 0? */
589 /* Is it is a NaN (i.e. the exponent is all ones and
590 the fraction is nonzero)? */
593 /* For lint, initialize these two variables to suppress warning: */
594 low = high = nonnegative = 0;
597 /* It's single precision. */
598 /* Assume that floating point byte order is the same as
599 integer byte order. */
600 low = extract_unsigned_integer (valaddr, 4);
601 nonnegative = ((low & 0x80000000) == 0);
602 is_nan = ((((low >> 23) & 0xFF) == 0xFF)
603 && 0 != (low & 0x7FFFFF));
609 /* It's double precision. Get the high and low words. */
611 /* Assume that floating point byte order is the same as
612 integer byte order. */
613 if (TARGET_BYTE_ORDER == BIG_ENDIAN)
615 low = extract_unsigned_integer (valaddr + 4, 4);
616 high = extract_unsigned_integer (valaddr, 4);
620 low = extract_unsigned_integer (valaddr, 4);
621 high = extract_unsigned_integer (valaddr + 4, 4);
623 nonnegative = ((high & 0x80000000) == 0);
624 is_nan = (((high >> 20) & 0x7ff) == 0x7ff
625 && !((((high & 0xfffff) == 0)) && (low == 0)));
630 #ifdef TARGET_ANALYZE_FLOATING
631 TARGET_ANALYZE_FLOATING;
633 /* Extended. We can't detect extended NaNs for this target.
634 Also note that currently extendeds get nuked to double in
635 REGISTER_CONVERTIBLE. */
642 /* The meaning of the sign and fraction is not defined by IEEE.
643 But the user might know what they mean. For example, they
644 (in an implementation-defined manner) distinguish between
645 signaling and quiet NaN's. */
647 fprintf_filtered (stream, "-NaN(0x%lx%.8lx)" + !!nonnegative,
650 fprintf_filtered (stream, "-NaN(0x%lx)" + nonnegative, low);
654 #endif /* IEEE_FLOAT. */
656 doub = unpack_double (type, valaddr, &inv);
659 fprintf_filtered (stream, "<invalid float value>");
663 if (len < sizeof (double))
664 fprintf_filtered (stream, "%.9g", (double) doub);
665 else if (len == sizeof (double))
666 fprintf_filtered (stream, "%.17g", (double) doub);
668 #ifdef PRINTF_HAS_LONG_DOUBLE
669 fprintf_filtered (stream, "%.35Lg", doub);
671 /* This at least wins with values that are representable as doubles */
672 fprintf_filtered (stream, "%.17g", (double) doub);
677 print_binary_chars (stream, valaddr, len)
679 unsigned char *valaddr;
683 #define BITS_IN_BYTES 8
689 /* Declared "int" so it will be signed.
690 * This ensures that right shift will shift in zeros.
692 const int mask = 0x080;
694 /* FIXME: We should be not printing leading zeroes in most cases. */
696 fprintf_filtered (stream, local_binary_format_prefix ());
697 if (TARGET_BYTE_ORDER == BIG_ENDIAN)
703 /* Every byte has 8 binary characters; peel off
704 * and print from the MSB end.
706 for (i = 0; i < (BITS_IN_BYTES * sizeof (*p)); i++)
708 if (*p & (mask >> i))
713 fprintf_filtered (stream, "%1d", b);
719 for (p = valaddr + len - 1;
723 for (i = 0; i < (BITS_IN_BYTES * sizeof (*p)); i++)
725 if (*p & (mask >> i))
730 fprintf_filtered (stream, "%1d", b);
734 fprintf_filtered (stream, local_binary_format_suffix ());
737 /* VALADDR points to an integer of LEN bytes.
738 * Print it in octal on stream or format it in buf.
741 print_octal_chars (stream, valaddr, len)
743 unsigned char *valaddr;
747 unsigned char octa1, octa2, octa3, carry;
750 /* FIXME: We should be not printing leading zeroes in most cases. */
753 /* Octal is 3 bits, which doesn't fit. Yuk. So we have to track
754 * the extra bits, which cycle every three bytes:
758 * bit number 123 456 78 | 9 012 345 6 | 78 901 234 | 567 890 12 |
760 * Octal side: 0 1 carry 3 4 carry ...
762 * Cycle number: 0 1 2
764 * But of course we are printing from the high side, so we have to
765 * figure out where in the cycle we are so that we end up with no
766 * left over bits at the end.
768 #define BITS_IN_OCTAL 3
769 #define HIGH_ZERO 0340
770 #define LOW_ZERO 0016
771 #define CARRY_ZERO 0003
772 #define HIGH_ONE 0200
775 #define CARRY_ONE 0001
776 #define HIGH_TWO 0300
780 /* For 32 we start in cycle 2, with two bits and one bit carry;
781 * for 64 in cycle in cycle 1, with one bit and a two bit carry.
783 cycle = (len * BITS_IN_BYTES) % BITS_IN_OCTAL;
786 fprintf_filtered (stream, local_octal_format_prefix ());
787 if (TARGET_BYTE_ORDER == BIG_ENDIAN)
796 /* No carry in, carry out two bits.
798 octa1 = (HIGH_ZERO & *p) >> 5;
799 octa2 = (LOW_ZERO & *p) >> 2;
800 carry = (CARRY_ZERO & *p);
801 fprintf_filtered (stream, "%o", octa1);
802 fprintf_filtered (stream, "%o", octa2);
806 /* Carry in two bits, carry out one bit.
808 octa1 = (carry << 1) | ((HIGH_ONE & *p) >> 7);
809 octa2 = (MID_ONE & *p) >> 4;
810 octa3 = (LOW_ONE & *p) >> 1;
811 carry = (CARRY_ONE & *p);
812 fprintf_filtered (stream, "%o", octa1);
813 fprintf_filtered (stream, "%o", octa2);
814 fprintf_filtered (stream, "%o", octa3);
818 /* Carry in one bit, no carry out.
820 octa1 = (carry << 2) | ((HIGH_TWO & *p) >> 6);
821 octa2 = (MID_TWO & *p) >> 3;
822 octa3 = (LOW_TWO & *p);
824 fprintf_filtered (stream, "%o", octa1);
825 fprintf_filtered (stream, "%o", octa2);
826 fprintf_filtered (stream, "%o", octa3);
830 error ("Internal error in octal conversion;");
834 cycle = cycle % BITS_IN_OCTAL;
839 for (p = valaddr + len - 1;
846 /* Carry out, no carry in */
847 octa1 = (HIGH_ZERO & *p) >> 5;
848 octa2 = (LOW_ZERO & *p) >> 2;
849 carry = (CARRY_ZERO & *p);
850 fprintf_filtered (stream, "%o", octa1);
851 fprintf_filtered (stream, "%o", octa2);
855 /* Carry in, carry out */
856 octa1 = (carry << 1) | ((HIGH_ONE & *p) >> 7);
857 octa2 = (MID_ONE & *p) >> 4;
858 octa3 = (LOW_ONE & *p) >> 1;
859 carry = (CARRY_ONE & *p);
860 fprintf_filtered (stream, "%o", octa1);
861 fprintf_filtered (stream, "%o", octa2);
862 fprintf_filtered (stream, "%o", octa3);
866 /* Carry in, no carry out */
867 octa1 = (carry << 2) | ((HIGH_TWO & *p) >> 6);
868 octa2 = (MID_TWO & *p) >> 3;
869 octa3 = (LOW_TWO & *p);
871 fprintf_filtered (stream, "%o", octa1);
872 fprintf_filtered (stream, "%o", octa2);
873 fprintf_filtered (stream, "%o", octa3);
877 error ("Internal error in octal conversion;");
881 cycle = cycle % BITS_IN_OCTAL;
885 fprintf_filtered (stream, local_octal_format_suffix ());
888 /* VALADDR points to an integer of LEN bytes.
889 * Print it in decimal on stream or format it in buf.
892 print_decimal_chars (stream, valaddr, len)
894 unsigned char *valaddr;
898 #define TWO_TO_FOURTH 16
899 #define CARRY_OUT( x ) ((x) / TEN) /* extend char to int */
900 #define CARRY_LEFT( x ) ((x) % TEN)
901 #define SHIFT( x ) ((x) << 4)
903 ((TARGET_BYTE_ORDER == BIG_ENDIAN) ? valaddr : valaddr + len - 1)
905 ((TARGET_BYTE_ORDER == BIG_ENDIAN) ? (p < valaddr + len) : (p >= valaddr))
907 ((TARGET_BYTE_ORDER == BIG_ENDIAN) ? p++ : p-- )
908 #define LOW_NIBBLE( x ) ( (x) & 0x00F)
909 #define HIGH_NIBBLE( x ) (((x) & 0x0F0) >> 4)
912 unsigned char *digits;
915 int i, j, decimal_digits;
919 /* Base-ten number is less than twice as many digits
920 * as the base 16 number, which is 2 digits per byte.
922 decimal_len = len * 2 * 2;
923 digits = (unsigned char *) malloc (decimal_len);
925 error ("Can't allocate memory for conversion to decimal.");
927 for (i = 0; i < decimal_len; i++)
932 fprintf_filtered (stream, local_decimal_format_prefix ());
934 /* Ok, we have an unknown number of bytes of data to be printed in
937 * Given a hex number (in nibbles) as XYZ, we start by taking X and
938 * decemalizing it as "x1 x2" in two decimal nibbles. Then we multiply
939 * the nibbles by 16, add Y and re-decimalize. Repeat with Z.
941 * The trick is that "digits" holds a base-10 number, but sometimes
942 * the individual digits are > 10.
944 * Outer loop is per nibble (hex digit) of input, from MSD end to
947 decimal_digits = 0; /* Number of decimal digits so far */
953 * Multiply current base-ten number by 16 in place.
954 * Each digit was between 0 and 9, now is between
957 for (j = 0; j < decimal_digits; j++)
959 digits[j] = SHIFT (digits[j]);
962 /* Take the next nibble off the input and add it to what
963 * we've got in the LSB position. Bottom 'digit' is now
966 * "flip" is used to run this loop twice for each byte.
972 digits[0] += HIGH_NIBBLE (*p);
977 /* Take low nibble and bump our pointer "p".
979 digits[0] += LOW_NIBBLE (*p);
984 /* Re-decimalize. We have to do this often enough
985 * that we don't overflow, but once per nibble is
986 * overkill. Easier this way, though. Note that the
987 * carry is often larger than 10 (e.g. max initial
988 * carry out of lowest nibble is 15, could bubble all
989 * the way up greater than 10). So we have to do
990 * the carrying beyond the last current digit.
993 for (j = 0; j < decimal_len - 1; j++)
997 /* "/" won't handle an unsigned char with
998 * a value that if signed would be negative.
999 * So extend to longword int via "dummy".
1002 carry = CARRY_OUT (dummy);
1003 digits[j] = CARRY_LEFT (dummy);
1005 if (j >= decimal_digits && carry == 0)
1008 * All higher digits are 0 and we
1009 * no longer have a carry.
1011 * Note: "j" is 0-based, "decimal_digits" is
1014 decimal_digits = j + 1;
1020 /* Ok, now "digits" is the decimal representation, with
1021 * the "decimal_digits" actual digits. Print!
1023 for (i = decimal_digits - 1; i >= 0; i--)
1025 fprintf_filtered (stream, "%1d", digits[i]);
1029 fprintf_filtered (stream, local_decimal_format_suffix ());
1032 /* VALADDR points to an integer of LEN bytes. Print it in hex on stream. */
1035 print_hex_chars (stream, valaddr, len)
1037 unsigned char *valaddr;
1042 /* FIXME: We should be not printing leading zeroes in most cases. */
1044 fprintf_filtered (stream, local_hex_format_prefix ());
1045 if (TARGET_BYTE_ORDER == BIG_ENDIAN)
1051 fprintf_filtered (stream, "%02x", *p);
1056 for (p = valaddr + len - 1;
1060 fprintf_filtered (stream, "%02x", *p);
1063 fprintf_filtered (stream, local_hex_format_suffix ());
1066 /* Called by various <lang>_val_print routines to print elements of an
1067 array in the form "<elem1>, <elem2>, <elem3>, ...".
1069 (FIXME?) Assumes array element separator is a comma, which is correct
1070 for all languages currently handled.
1071 (FIXME?) Some languages have a notation for repeated array elements,
1072 perhaps we should try to use that notation when appropriate.
1076 val_print_array_elements (type, valaddr, address, stream, format, deref_ref,
1085 enum val_prettyprint pretty;
1088 unsigned int things_printed = 0;
1090 struct type *elttype;
1092 /* Position of the array element we are examining to see
1093 whether it is repeated. */
1095 /* Number of repetitions we have detected so far. */
1098 elttype = TYPE_TARGET_TYPE (type);
1099 eltlen = TYPE_LENGTH (check_typedef (elttype));
1100 len = TYPE_LENGTH (type) / eltlen;
1102 annotate_array_section_begin (i, elttype);
1104 for (; i < len && things_printed < print_max; i++)
1108 if (prettyprint_arrays)
1110 fprintf_filtered (stream, ",\n");
1111 print_spaces_filtered (2 + 2 * recurse, stream);
1115 fprintf_filtered (stream, ", ");
1118 wrap_here (n_spaces (2 + 2 * recurse));
1122 while ((rep1 < len) &&
1123 !memcmp (valaddr + i * eltlen, valaddr + rep1 * eltlen, eltlen))
1129 if (reps > repeat_count_threshold)
1131 val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format,
1132 deref_ref, recurse + 1, pretty);
1133 annotate_elt_rep (reps);
1134 fprintf_filtered (stream, " <repeats %u times>", reps);
1135 annotate_elt_rep_end ();
1138 things_printed += repeat_count_threshold;
1142 val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format,
1143 deref_ref, recurse + 1, pretty);
1148 annotate_array_section_end ();
1151 fprintf_filtered (stream, "...");
1155 /* Read LEN bytes of target memory at address MEMADDR, placing the
1156 results in GDB's memory at MYADDR. Returns a count of the bytes
1157 actually read, and optionally an errno value in the location
1158 pointed to by ERRNOPTR if ERRNOPTR is non-null. */
1160 /* FIXME: cagney/1999-10-14: Only used by val_print_string. Can this
1161 function be eliminated. */
1164 partial_memory_read (CORE_ADDR memaddr, char *myaddr, int len, int *errnoptr)
1166 int nread; /* Number of bytes actually read. */
1167 int errcode; /* Error from last read. */
1169 /* First try a complete read. */
1170 errcode = target_read_memory (memaddr, myaddr, len);
1178 /* Loop, reading one byte at a time until we get as much as we can. */
1179 for (errcode = 0, nread = 0; len > 0 && errcode == 0; nread++, len--)
1181 errcode = target_read_memory (memaddr++, myaddr++, 1);
1183 /* If an error, the last read was unsuccessful, so adjust count. */
1189 if (errnoptr != NULL)
1191 *errnoptr = errcode;
1196 /* Print a string from the inferior, starting at ADDR and printing up to LEN
1197 characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing
1198 stops at the first null byte, otherwise printing proceeds (including null
1199 bytes) until either print_max or LEN characters have been printed,
1200 whichever is smaller. */
1202 /* FIXME: Use target_read_string. */
1205 val_print_string (addr, len, width, stream)
1211 int force_ellipsis = 0; /* Force ellipsis to be printed if nonzero. */
1212 int errcode; /* Errno returned from bad reads. */
1213 unsigned int fetchlimit; /* Maximum number of chars to print. */
1214 unsigned int nfetch; /* Chars to fetch / chars fetched. */
1215 unsigned int chunksize; /* Size of each fetch, in chars. */
1216 char *buffer = NULL; /* Dynamically growable fetch buffer. */
1217 char *bufptr; /* Pointer to next available byte in buffer. */
1218 char *limit; /* First location past end of fetch buffer. */
1219 struct cleanup *old_chain = NULL; /* Top of the old cleanup chain. */
1220 int found_nul; /* Non-zero if we found the nul char */
1222 /* First we need to figure out the limit on the number of characters we are
1223 going to attempt to fetch and print. This is actually pretty simple. If
1224 LEN >= zero, then the limit is the minimum of LEN and print_max. If
1225 LEN is -1, then the limit is print_max. This is true regardless of
1226 whether print_max is zero, UINT_MAX (unlimited), or something in between,
1227 because finding the null byte (or available memory) is what actually
1228 limits the fetch. */
1230 fetchlimit = (len == -1 ? print_max : min (len, print_max));
1232 /* Now decide how large of chunks to try to read in one operation. This
1233 is also pretty simple. If LEN >= zero, then we want fetchlimit chars,
1234 so we might as well read them all in one operation. If LEN is -1, we
1235 are looking for a null terminator to end the fetching, so we might as
1236 well read in blocks that are large enough to be efficient, but not so
1237 large as to be slow if fetchlimit happens to be large. So we choose the
1238 minimum of 8 and fetchlimit. We used to use 200 instead of 8 but
1239 200 is way too big for remote debugging over a serial line. */
1241 chunksize = (len == -1 ? min (8, fetchlimit) : fetchlimit);
1243 /* Loop until we either have all the characters to print, or we encounter
1244 some error, such as bumping into the end of the address space. */
1247 old_chain = make_cleanup (null_cleanup, 0);
1251 buffer = (char *) xmalloc (len * width);
1253 old_chain = make_cleanup (free, buffer);
1255 nfetch = partial_memory_read (addr, bufptr, len * width, &errcode)
1257 addr += nfetch * width;
1258 bufptr += nfetch * width;
1262 unsigned long bufsize = 0;
1266 nfetch = min (chunksize, fetchlimit - bufsize);
1269 buffer = (char *) xmalloc (nfetch * width);
1272 discard_cleanups (old_chain);
1273 buffer = (char *) xrealloc (buffer, (nfetch + bufsize) * width);
1276 old_chain = make_cleanup (free, buffer);
1277 bufptr = buffer + bufsize * width;
1280 /* Read as much as we can. */
1281 nfetch = partial_memory_read (addr, bufptr, nfetch * width, &errcode)
1284 /* Scan this chunk for the null byte that terminates the string
1285 to print. If found, we don't need to fetch any more. Note
1286 that bufptr is explicitly left pointing at the next character
1287 after the null byte, or at the next character after the end of
1290 limit = bufptr + nfetch * width;
1291 while (bufptr < limit)
1295 c = extract_unsigned_integer (bufptr, width);
1300 /* We don't care about any error which happened after
1301 the NULL terminator. */
1308 while (errcode == 0 /* no error */
1309 && bufptr - buffer < fetchlimit * width /* no overrun */
1310 && !found_nul); /* haven't found nul yet */
1313 { /* length of string is really 0! */
1314 buffer = bufptr = NULL;
1318 /* bufptr and addr now point immediately beyond the last byte which we
1319 consider part of the string (including a '\0' which ends the string). */
1321 /* We now have either successfully filled the buffer to fetchlimit, or
1322 terminated early due to an error or finding a null char when LEN is -1. */
1324 if (len == -1 && !found_nul)
1328 /* We didn't find a null terminator we were looking for. Attempt
1329 to peek at the next character. If not successful, or it is not
1330 a null byte, then force ellipsis to be printed. */
1332 peekbuf = (char *) alloca (width);
1334 if (target_read_memory (addr, peekbuf, width) == 0
1335 && extract_unsigned_integer (peekbuf, width) != 0)
1338 else if ((len >= 0 && errcode != 0) || (len > (bufptr - buffer) / width))
1340 /* Getting an error when we have a requested length, or fetching less
1341 than the number of characters actually requested, always make us
1348 /* If we get an error before fetching anything, don't print a string.
1349 But if we fetch something and then get an error, print the string
1350 and then the error message. */
1351 if (errcode == 0 || bufptr > buffer)
1355 fputs_filtered (" ", stream);
1357 LA_PRINT_STRING (stream, buffer, (bufptr - buffer) / width, width, force_ellipsis);
1364 fprintf_filtered (stream, " <Address ");
1365 print_address_numeric (addr, 1, stream);
1366 fprintf_filtered (stream, " out of bounds>");
1370 fprintf_filtered (stream, " <Error reading address ");
1371 print_address_numeric (addr, 1, stream);
1372 fprintf_filtered (stream, ": %s>", safe_strerror (errcode));
1376 do_cleanups (old_chain);
1377 return ((bufptr - buffer) / width);
1381 /* Validate an input or output radix setting, and make sure the user
1382 knows what they really did here. Radix setting is confusing, e.g.
1383 setting the input radix to "10" never changes it! */
1387 set_input_radix (args, from_tty, c)
1390 struct cmd_list_element *c;
1392 set_input_radix_1 (from_tty, *(unsigned *) c->var);
1397 set_input_radix_1 (from_tty, radix)
1401 /* We don't currently disallow any input radix except 0 or 1, which don't
1402 make any mathematical sense. In theory, we can deal with any input
1403 radix greater than 1, even if we don't have unique digits for every
1404 value from 0 to radix-1, but in practice we lose on large radix values.
1405 We should either fix the lossage or restrict the radix range more.
1410 error ("Nonsense input radix ``decimal %u''; input radix unchanged.",
1413 input_radix = radix;
1416 printf_filtered ("Input radix now set to decimal %u, hex %x, octal %o.\n",
1417 radix, radix, radix);
1423 set_output_radix (args, from_tty, c)
1426 struct cmd_list_element *c;
1428 set_output_radix_1 (from_tty, *(unsigned *) c->var);
1432 set_output_radix_1 (from_tty, radix)
1436 /* Validate the radix and disallow ones that we aren't prepared to
1437 handle correctly, leaving the radix unchanged. */
1441 output_format = 'x'; /* hex */
1444 output_format = 0; /* decimal */
1447 output_format = 'o'; /* octal */
1450 error ("Unsupported output radix ``decimal %u''; output radix unchanged.",
1453 output_radix = radix;
1456 printf_filtered ("Output radix now set to decimal %u, hex %x, octal %o.\n",
1457 radix, radix, radix);
1461 /* Set both the input and output radix at once. Try to set the output radix
1462 first, since it has the most restrictive range. An radix that is valid as
1463 an output radix is also valid as an input radix.
1465 It may be useful to have an unusual input radix. If the user wishes to
1466 set an input radix that is not valid as an output radix, he needs to use
1467 the 'set input-radix' command. */
1470 set_radix (arg, from_tty)
1476 radix = (arg == NULL) ? 10 : parse_and_eval_address (arg);
1477 set_output_radix_1 (0, radix);
1478 set_input_radix_1 (0, radix);
1481 printf_filtered ("Input and output radices now set to decimal %u, hex %x, octal %o.\n",
1482 radix, radix, radix);
1486 /* Show both the input and output radices. */
1490 show_radix (arg, from_tty)
1496 if (input_radix == output_radix)
1498 printf_filtered ("Input and output radices set to decimal %u, hex %x, octal %o.\n",
1499 input_radix, input_radix, input_radix);
1503 printf_filtered ("Input radix set to decimal %u, hex %x, octal %o.\n",
1504 input_radix, input_radix, input_radix);
1505 printf_filtered ("Output radix set to decimal %u, hex %x, octal %o.\n",
1506 output_radix, output_radix, output_radix);
1514 set_print (arg, from_tty)
1519 "\"set print\" must be followed by the name of a print subcommand.\n");
1520 help_list (setprintlist, "set print ", -1, gdb_stdout);
1525 show_print (args, from_tty)
1529 cmd_show_list (showprintlist, from_tty, "");
1533 _initialize_valprint ()
1535 struct cmd_list_element *c;
1537 add_prefix_cmd ("print", no_class, set_print,
1538 "Generic command for setting how things print.",
1539 &setprintlist, "set print ", 0, &setlist);
1540 add_alias_cmd ("p", "print", no_class, 1, &setlist);
1541 /* prefer set print to set prompt */
1542 add_alias_cmd ("pr", "print", no_class, 1, &setlist);
1544 add_prefix_cmd ("print", no_class, show_print,
1545 "Generic command for showing print settings.",
1546 &showprintlist, "show print ", 0, &showlist);
1547 add_alias_cmd ("p", "print", no_class, 1, &showlist);
1548 add_alias_cmd ("pr", "print", no_class, 1, &showlist);
1551 (add_set_cmd ("elements", no_class, var_uinteger, (char *) &print_max,
1552 "Set limit on string chars or array elements to print.\n\
1553 \"set print elements 0\" causes there to be no limit.",
1558 (add_set_cmd ("null-stop", no_class, var_boolean,
1559 (char *) &stop_print_at_null,
1560 "Set printing of char arrays to stop at first null char.",
1565 (add_set_cmd ("repeats", no_class, var_uinteger,
1566 (char *) &repeat_count_threshold,
1567 "Set threshold for repeated print elements.\n\
1568 \"set print repeats 0\" causes all elements to be individually printed.",
1573 (add_set_cmd ("pretty", class_support, var_boolean,
1574 (char *) &prettyprint_structs,
1575 "Set prettyprinting of structures.",
1580 (add_set_cmd ("union", class_support, var_boolean, (char *) &unionprint,
1581 "Set printing of unions interior to structures.",
1586 (add_set_cmd ("array", class_support, var_boolean,
1587 (char *) &prettyprint_arrays,
1588 "Set prettyprinting of arrays.",
1593 (add_set_cmd ("address", class_support, var_boolean, (char *) &addressprint,
1594 "Set printing of addresses.",
1598 c = add_set_cmd ("input-radix", class_support, var_uinteger,
1599 (char *) &input_radix,
1600 "Set default input radix for entering numbers.",
1602 add_show_from_set (c, &showlist);
1603 c->function.sfunc = set_input_radix;
1605 c = add_set_cmd ("output-radix", class_support, var_uinteger,
1606 (char *) &output_radix,
1607 "Set default output radix for printing of values.",
1609 add_show_from_set (c, &showlist);
1610 c->function.sfunc = set_output_radix;
1612 /* The "set radix" and "show radix" commands are special in that they are
1613 like normal set and show commands but allow two normally independent
1614 variables to be either set or shown with a single command. So the
1615 usual add_set_cmd() and add_show_from_set() commands aren't really
1617 add_cmd ("radix", class_support, set_radix,
1618 "Set default input and output number radices.\n\
1619 Use 'set input-radix' or 'set output-radix' to independently set each.\n\
1620 Without an argument, sets both radices back to the default value of 10.",
1622 add_cmd ("radix", class_support, show_radix,
1623 "Show the default input and output number radices.\n\
1624 Use 'show input-radix' or 'show output-radix' to independently show each.",
1627 /* Give people the defaults which they are used to. */
1628 prettyprint_structs = 0;
1629 prettyprint_arrays = 0;
1632 print_max = PRINT_MAX_DEFAULT;