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Diffstat (limited to 'gdb/valprint.c')
| -rw-r--r-- | gdb/valprint.c | 1567 |
1 files changed, 1567 insertions, 0 deletions
diff --git a/gdb/valprint.c b/gdb/valprint.c new file mode 100644 index 0000000..b09da9b --- /dev/null +++ b/gdb/valprint.c @@ -0,0 +1,1567 @@ +/* Print values for GDB, the GNU debugger. + Copyright 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1998 + Free Software Foundation, Inc. + +This file is part of GDB. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#include "defs.h" +#include "gdb_string.h" +#include "symtab.h" +#include "gdbtypes.h" +#include "value.h" +#include "gdbcore.h" +#include "gdbcmd.h" +#include "target.h" +#include "obstack.h" +#include "language.h" +#include "demangle.h" +#include "annotate.h" +#include "valprint.h" + +#include <errno.h> + +/* Prototypes for local functions */ + +static void print_hex_chars PARAMS ((GDB_FILE *, unsigned char *, + unsigned int)); + +static void show_print PARAMS ((char *, int)); + +static void set_print PARAMS ((char *, int)); + +static void set_radix PARAMS ((char *, int)); + +static void show_radix PARAMS ((char *, int)); + +static void set_input_radix PARAMS ((char *, int, struct cmd_list_element *)); + +static void set_input_radix_1 PARAMS ((int, unsigned)); + +static void set_output_radix PARAMS ((char *, int, struct cmd_list_element *)); + +static void set_output_radix_1 PARAMS ((int, unsigned)); + +void _initialize_valprint PARAMS ((void)); + +/* Maximum number of chars to print for a string pointer value or vector + contents, or UINT_MAX for no limit. Note that "set print elements 0" + stores UINT_MAX in print_max, which displays in a show command as + "unlimited". */ + +unsigned int print_max; +#define PRINT_MAX_DEFAULT 200 /* Start print_max off at this value. */ + +/* Default input and output radixes, and output format letter. */ + +unsigned input_radix = 10; +unsigned output_radix = 10; +int output_format = 0; + +/* Print repeat counts if there are more than this many repetitions of an + element in an array. Referenced by the low level language dependent + print routines. */ + +unsigned int repeat_count_threshold = 10; + +/* If nonzero, stops printing of char arrays at first null. */ + +int stop_print_at_null; + +/* Controls pretty printing of structures. */ + +int prettyprint_structs; + +/* Controls pretty printing of arrays. */ + +int prettyprint_arrays; + +/* If nonzero, causes unions inside structures or other unions to be + printed. */ + +int unionprint; /* Controls printing of nested unions. */ + +/* If nonzero, causes machine addresses to be printed in certain contexts. */ + +int addressprint; /* Controls printing of machine addresses */ + + +/* Print data of type TYPE located at VALADDR (within GDB), which came from + the inferior at address ADDRESS, onto stdio stream STREAM according to + FORMAT (a letter, or 0 for natural format using TYPE). + + If DEREF_REF is nonzero, then dereference references, otherwise just print + them like pointers. + + The PRETTY parameter controls prettyprinting. + + If the data are a string pointer, returns the number of string characters + printed. + + FIXME: The data at VALADDR is in target byte order. If gdb is ever + enhanced to be able to debug more than the single target it was compiled + for (specific CPU type and thus specific target byte ordering), then + either the print routines are going to have to take this into account, + or the data is going to have to be passed into here already converted + to the host byte ordering, whichever is more convenient. */ + + +int +val_print (type, valaddr, embedded_offset, address, + stream, format, deref_ref, recurse, pretty) + struct type *type; + char *valaddr; + int embedded_offset; + CORE_ADDR address; + GDB_FILE *stream; + int format; + int deref_ref; + int recurse; + enum val_prettyprint pretty; +{ + struct type *real_type = check_typedef (type); + if (pretty == Val_pretty_default) + { + pretty = prettyprint_structs ? Val_prettyprint : Val_no_prettyprint; + } + + QUIT; + + /* Ensure that the type is complete and not just a stub. If the type is + only a stub and we can't find and substitute its complete type, then + print appropriate string and return. */ + + if (TYPE_FLAGS (real_type) & TYPE_FLAG_STUB) + { + fprintf_filtered (stream, "<incomplete type>"); + gdb_flush (stream); + return (0); + } + + return (LA_VAL_PRINT (type, valaddr, embedded_offset, address, + stream, format, deref_ref, recurse, pretty)); +} + +/* Print the value VAL in C-ish syntax on stream STREAM. + FORMAT is a format-letter, or 0 for print in natural format of data type. + If the object printed is a string pointer, returns + the number of string bytes printed. */ + +int +value_print (val, stream, format, pretty) + value_ptr val; + GDB_FILE *stream; + int format; + enum val_prettyprint pretty; +{ + if (val == 0) + { + printf_filtered ("<address of value unknown>"); + return 0; + } + if (VALUE_OPTIMIZED_OUT (val)) + { + printf_filtered ("<value optimized out>"); + return 0; + } + return LA_VALUE_PRINT (val, stream, format, pretty); +} + +/* Called by various <lang>_val_print routines to print + TYPE_CODE_INT's. TYPE is the type. VALADDR is the address of the + value. STREAM is where to print the value. */ + +void +val_print_type_code_int (type, valaddr, stream) + struct type *type; + char *valaddr; + GDB_FILE *stream; +{ + if (TYPE_LENGTH (type) > sizeof (LONGEST)) + { + LONGEST val; + + if (TYPE_UNSIGNED (type) + && extract_long_unsigned_integer (valaddr, TYPE_LENGTH (type), + &val)) + { + print_longest (stream, 'u', 0, val); + } + else + { + /* Signed, or we couldn't turn an unsigned value into a + LONGEST. For signed values, one could assume two's + complement (a reasonable assumption, I think) and do + better than this. */ + print_hex_chars (stream, (unsigned char *) valaddr, + TYPE_LENGTH (type)); + } + } + else + { +#ifdef PRINT_TYPELESS_INTEGER + PRINT_TYPELESS_INTEGER (stream, type, unpack_long (type, valaddr)); +#else + print_longest (stream, TYPE_UNSIGNED (type) ? 'u' : 'd', 0, + unpack_long (type, valaddr)); +#endif + } +} + +/* Print a number according to FORMAT which is one of d,u,x,o,b,h,w,g. + The raison d'etre of this function is to consolidate printing of + LONG_LONG's into this one function. Some platforms have long longs but + don't have a printf() that supports "ll" in the format string. We handle + these by seeing if the number is representable as either a signed or + unsigned long, depending upon what format is desired, and if not we just + bail out and print the number in hex. + + The format chars b,h,w,g are from print_scalar_formatted(). If USE_LOCAL, + format it according to the current language (this should be used for most + integers which GDB prints, the exception is things like protocols where + the format of the integer is a protocol thing, not a user-visible thing). + */ + +#if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG) +static void +print_decimal (stream, sign, use_local, val_ulong) + GDB_FILE *stream; + char *sign; + int use_local; + ULONGEST val_ulong; +{ + unsigned long temp[3]; + int i = 0; + do + { + temp[i] = val_ulong % (1000 * 1000 * 1000); + val_ulong /= (1000 * 1000 * 1000); + i++; + } + while (val_ulong != 0 && i < (sizeof (temp) / sizeof (temp[0]))); + switch (i) + { + case 1: + fprintf_filtered (stream, "%s%lu", + sign, temp[0]); + break; + case 2: + fprintf_filtered (stream, "%s%lu%09lu", + sign, temp[1], temp[0]); + break; + case 3: + fprintf_filtered (stream, "%s%lu%09lu%09lu", + sign, temp[2], temp[1], temp[0]); + break; + default: + abort (); + } + return; +} +#endif + +void +print_longest (stream, format, use_local, val_long) + GDB_FILE *stream; + int format; + int use_local; + LONGEST val_long; +{ +#if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG) + if (sizeof (long) < sizeof (LONGEST)) + { + switch (format) + { + case 'd': + { + /* Print a signed value, that doesn't fit in a long */ + if ((long) val_long != val_long) + { + if (val_long < 0) + print_decimal (stream, "-", use_local, -val_long); + else + print_decimal (stream, "", use_local, val_long); + return; + } + break; + } + case 'u': + { + /* Print an unsigned value, that doesn't fit in a long */ + if ((unsigned long) val_long != (ULONGEST) val_long) + { + print_decimal (stream, "", use_local, val_long); + return; + } + break; + } + case 'x': + case 'o': + case 'b': + case 'h': + case 'w': + case 'g': + /* Print as unsigned value, must fit completely in unsigned long */ + { + unsigned long temp = val_long; + if (temp != val_long) + { + /* Urk, can't represent value in long so print in hex. + Do shift in two operations so that if sizeof (long) + == sizeof (LONGEST) we can avoid warnings from + picky compilers about shifts >= the size of the + shiftee in bits */ + unsigned long vbot = (unsigned long) val_long; + LONGEST temp = (val_long >> (sizeof (long) * HOST_CHAR_BIT - 1)); + unsigned long vtop = temp >> 1; + fprintf_filtered (stream, "0x%lx%08lx", vtop, vbot); + return; + } + break; + } + } + } +#endif + +#if defined (CC_HAS_LONG_LONG) && defined (PRINTF_HAS_LONG_LONG) + switch (format) + { + case 'd': + fprintf_filtered (stream, + use_local ? local_decimal_format_custom ("ll") + : "%lld", + val_long); + break; + case 'u': + fprintf_filtered (stream, "%llu", val_long); + break; + case 'x': + fprintf_filtered (stream, + use_local ? local_hex_format_custom ("ll") + : "%llx", + val_long); + break; + case 'o': + fprintf_filtered (stream, + use_local ? local_octal_format_custom ("ll") + : "%llo", + val_long); + break; + case 'b': + fprintf_filtered (stream, local_hex_format_custom ("02ll"), val_long); + break; + case 'h': + fprintf_filtered (stream, local_hex_format_custom ("04ll"), val_long); + break; + case 'w': + fprintf_filtered (stream, local_hex_format_custom ("08ll"), val_long); + break; + case 'g': + fprintf_filtered (stream, local_hex_format_custom ("016ll"), val_long); + break; + default: + abort (); + } +#else /* !CC_HAS_LONG_LONG || !PRINTF_HAS_LONG_LONG*/ + /* In the following it is important to coerce (val_long) to a long. It does + nothing if !LONG_LONG, but it will chop off the top half (which we know + we can ignore) if the host supports long longs. */ + + switch (format) + { + case 'd': + fprintf_filtered (stream, + use_local ? local_decimal_format_custom ("l") + : "%ld", + (long) val_long); + break; + case 'u': + fprintf_filtered (stream, "%lu", (unsigned long) val_long); + break; + case 'x': + fprintf_filtered (stream, + use_local ? local_hex_format_custom ("l") + : "%lx", + (unsigned long) val_long); + break; + case 'o': + fprintf_filtered (stream, + use_local ? local_octal_format_custom ("l") + : "%lo", + (unsigned long) val_long); + break; + case 'b': + fprintf_filtered (stream, local_hex_format_custom ("02l"), + (unsigned long) val_long); + break; + case 'h': + fprintf_filtered (stream, local_hex_format_custom ("04l"), + (unsigned long) val_long); + break; + case 'w': + fprintf_filtered (stream, local_hex_format_custom ("08l"), + (unsigned long) val_long); + break; + case 'g': + fprintf_filtered (stream, local_hex_format_custom ("016l"), + (unsigned long) val_long); + break; + default: + abort (); + } +#endif /* CC_HAS_LONG_LONG || PRINTF_HAS_LONG_LONG */ +} + +void +strcat_longest (format, use_local, val_long, buf, buflen) + int format; + int use_local; + LONGEST val_long; + char *buf; + int buflen; /* ignored, for now */ +{ +#if defined (CC_HAS_LONG_LONG) && !defined (PRINTF_HAS_LONG_LONG) + long vtop, vbot; + + vtop = val_long >> (sizeof (long) * HOST_CHAR_BIT); + vbot = (long) val_long; + + if ((format == 'd' && (val_long < INT_MIN || val_long > INT_MAX)) + || ((format == 'u' || format == 'x') && (unsigned long long)val_long > UINT_MAX)) + { + sprintf (buf, "0x%lx%08lx", vtop, vbot); + return; + } +#endif + +#ifdef PRINTF_HAS_LONG_LONG + switch (format) + { + case 'd': + sprintf (buf, + (use_local ? local_decimal_format_custom ("ll") : "%lld"), + val_long); + break; + case 'u': + sprintf (buf, "%llu", val_long); + break; + case 'x': + sprintf (buf, + (use_local ? local_hex_format_custom ("ll") : "%llx"), + + val_long); + break; + case 'o': + sprintf (buf, + (use_local ? local_octal_format_custom ("ll") : "%llo"), + val_long); + break; + case 'b': + sprintf (buf, local_hex_format_custom ("02ll"), val_long); + break; + case 'h': + sprintf (buf, local_hex_format_custom ("04ll"), val_long); + break; + case 'w': + sprintf (buf, local_hex_format_custom ("08ll"), val_long); + break; + case 'g': + sprintf (buf, local_hex_format_custom ("016ll"), val_long); + break; + default: + abort (); + } +#else /* !PRINTF_HAS_LONG_LONG */ + /* In the following it is important to coerce (val_long) to a long. It does + nothing if !LONG_LONG, but it will chop off the top half (which we know + we can ignore) if the host supports long longs. */ + + switch (format) + { + case 'd': + sprintf (buf, (use_local ? local_decimal_format_custom ("l") : "%ld"), + ((long) val_long)); + break; + case 'u': + sprintf (buf, "%lu", ((unsigned long) val_long)); + break; + case 'x': + sprintf (buf, (use_local ? local_hex_format_custom ("l") : "%lx"), + ((long) val_long)); + break; + case 'o': + sprintf (buf, (use_local ? local_octal_format_custom ("l") : "%lo"), + ((long) val_long)); + break; + case 'b': + sprintf (buf, local_hex_format_custom ("02l"), + ((long) val_long)); + break; + case 'h': + sprintf (buf, local_hex_format_custom ("04l"), + ((long) val_long)); + break; + case 'w': + sprintf (buf, local_hex_format_custom ("08l"), + ((long) val_long)); + break; + case 'g': + sprintf (buf, local_hex_format_custom ("016l"), + ((long) val_long)); + break; + default: + abort (); + } + +#endif /* !PRINTF_HAS_LONG_LONG */ +} + +/* This used to be a macro, but I don't think it is called often enough + to merit such treatment. */ +/* Convert a LONGEST to an int. This is used in contexts (e.g. number of + arguments to a function, number in a value history, register number, etc.) + where the value must not be larger than can fit in an int. */ + +int +longest_to_int (arg) + LONGEST arg; +{ + /* Let the compiler do the work */ + int rtnval = (int) arg; + + /* Check for overflows or underflows */ + if (sizeof (LONGEST) > sizeof (int)) + { + if (rtnval != arg) + { + error ("Value out of range."); + } + } + return (rtnval); +} + +/* Print a floating point value of type TYPE, pointed to in GDB by VALADDR, + on STREAM. */ + +void +print_floating (valaddr, type, stream) + char *valaddr; + struct type *type; + GDB_FILE *stream; +{ + DOUBLEST doub; + int inv; + unsigned len = TYPE_LENGTH (type); + +#if defined (IEEE_FLOAT) + + /* Check for NaN's. Note that this code does not depend on us being + on an IEEE conforming system. It only depends on the target + machine using IEEE representation. This means (a) + cross-debugging works right, and (2) IEEE_FLOAT can (and should) + be defined for systems like the 68881, which uses IEEE + representation, but is not IEEE conforming. */ + + { + unsigned long low, high; + /* Is the sign bit 0? */ + int nonnegative; + /* Is it is a NaN (i.e. the exponent is all ones and + the fraction is nonzero)? */ + int is_nan; + + /* For lint, initialize these two variables to suppress warning: */ + low = high = nonnegative = 0; + if (len == 4) + { + /* It's single precision. */ + /* Assume that floating point byte order is the same as + integer byte order. */ + low = extract_unsigned_integer (valaddr, 4); + nonnegative = ((low & 0x80000000) == 0); + is_nan = ((((low >> 23) & 0xFF) == 0xFF) + && 0 != (low & 0x7FFFFF)); + low &= 0x7fffff; + high = 0; + } + else if (len == 8) + { + /* It's double precision. Get the high and low words. */ + + /* Assume that floating point byte order is the same as + integer byte order. */ + if (TARGET_BYTE_ORDER == BIG_ENDIAN) + { + low = extract_unsigned_integer (valaddr + 4, 4); + high = extract_unsigned_integer (valaddr, 4); + } + else + { + low = extract_unsigned_integer (valaddr, 4); + high = extract_unsigned_integer (valaddr + 4, 4); + } + nonnegative = ((high & 0x80000000) == 0); + is_nan = (((high >> 20) & 0x7ff) == 0x7ff + && ! ((((high & 0xfffff) == 0)) && (low == 0))); + high &= 0xfffff; + } + else + /* Extended. We can't detect NaNs for extendeds yet. Also note + that currently extendeds get nuked to double in + REGISTER_CONVERTIBLE. */ + is_nan = 0; + + if (is_nan) + { + /* The meaning of the sign and fraction is not defined by IEEE. + But the user might know what they mean. For example, they + (in an implementation-defined manner) distinguish between + signaling and quiet NaN's. */ + if (high) + fprintf_filtered (stream, "-NaN(0x%lx%.8lx)" + nonnegative, + high, low); + else + fprintf_filtered (stream, "-NaN(0x%lx)" + nonnegative, low); + return; + } + } +#endif /* IEEE_FLOAT. */ + + doub = unpack_double (type, valaddr, &inv); + if (inv) + { + fprintf_filtered (stream, "<invalid float value>"); + return; + } + + if (len < sizeof (double)) + fprintf_filtered (stream, "%.9g", (double) doub); + else if (len == sizeof (double)) + fprintf_filtered (stream, "%.17g", (double) doub); + else +#ifdef PRINTF_HAS_LONG_DOUBLE + fprintf_filtered (stream, "%.35Lg", doub); +#else + /* This at least wins with values that are representable as doubles */ + fprintf_filtered (stream, "%.17g", (double) doub); +#endif +} + +void +print_binary_chars (stream, valaddr, len) + GDB_FILE *stream; + unsigned char *valaddr; + unsigned len; +{ + +#define BITS_IN_BYTES 8 + + unsigned char *p; + int i; + int b; + + /* Declared "int" so it will be signed. + * This ensures that right shift will shift in zeros. + */ + const int mask = 0x080; + + /* FIXME: We should be not printing leading zeroes in most cases. */ + + fprintf_filtered (stream, local_binary_format_prefix ()); + if (TARGET_BYTE_ORDER == BIG_ENDIAN) + { + for (p = valaddr; + p < valaddr + len; + p++) + { + /* Every byte has 8 binary characters; peel off + * and print from the MSB end. + */ + for( i = 0; i < (BITS_IN_BYTES * sizeof( *p )); i++ ) { + if( *p & ( mask >> i )) + b = 1; + else + b = 0; + + fprintf_filtered (stream, "%1d", b); + } + } + } + else + { + for (p = valaddr + len - 1; + p >= valaddr; + p--) + { + for( i = 0; i < (BITS_IN_BYTES * sizeof( *p )); i++ ) { + if( *p & ( mask >> i )) + b = 1; + else + b = 0; + + fprintf_filtered (stream, "%1d", b); + } + } + } + fprintf_filtered (stream, local_binary_format_suffix ()); +} + +/* VALADDR points to an integer of LEN bytes. + * Print it in octal on stream or format it in buf. + */ +void +print_octal_chars (stream, valaddr, len) + GDB_FILE *stream; + unsigned char *valaddr; + unsigned len; +{ + unsigned char *p; + unsigned char octa1, octa2, octa3, carry; + int cycle; + + /* FIXME: We should be not printing leading zeroes in most cases. */ + + + /* Octal is 3 bits, which doesn't fit. Yuk. So we have to track + * the extra bits, which cycle every three bytes: + * + * Byte side: 0 1 2 3 + * | | | | + * bit number 123 456 78 | 9 012 345 6 | 78 901 234 | 567 890 12 | + * + * Octal side: 0 1 carry 3 4 carry ... + * + * Cycle number: 0 1 2 + * + * But of course we are printing from the high side, so we have to + * figure out where in the cycle we are so that we end up with no + * left over bits at the end. + */ +#define BITS_IN_OCTAL 3 +#define HIGH_ZERO 0340 +#define LOW_ZERO 0016 +#define CARRY_ZERO 0003 +#define HIGH_ONE 0200 +#define MID_ONE 0160 +#define LOW_ONE 0016 +#define CARRY_ONE 0001 +#define HIGH_TWO 0300 +#define MID_TWO 0070 +#define LOW_TWO 0007 + + /* For 32 we start in cycle 2, with two bits and one bit carry; + * for 64 in cycle in cycle 1, with one bit and a two bit carry. + */ + cycle = (len * BITS_IN_BYTES) % BITS_IN_OCTAL; + carry = 0; + + fprintf_filtered (stream, local_octal_format_prefix ()); + if (TARGET_BYTE_ORDER == BIG_ENDIAN) + { + for (p = valaddr; + p < valaddr + len; + p++) + { + switch (cycle) { + case 0: + /* No carry in, carry out two bits. + */ + octa1 = (HIGH_ZERO & *p) >> 5; + octa2 = (LOW_ZERO & *p) >> 2; + carry = (CARRY_ZERO & *p); + fprintf_filtered (stream, "%o", octa1); + fprintf_filtered (stream, "%o", octa2); + break; + + case 1: + /* Carry in two bits, carry out one bit. + */ + octa1 = (carry << 1) | ((HIGH_ONE & *p) >> 7); + octa2 = (MID_ONE & *p) >> 4; + octa3 = (LOW_ONE & *p) >> 1; + carry = (CARRY_ONE & *p); + fprintf_filtered (stream, "%o", octa1); + fprintf_filtered (stream, "%o", octa2); + fprintf_filtered (stream, "%o", octa3); + break; + + case 2: + /* Carry in one bit, no carry out. + */ + octa1 = (carry << 2) | ((HIGH_TWO & *p) >> 6); + octa2 = (MID_TWO & *p) >> 3; + octa3 = (LOW_TWO & *p); + carry = 0; + fprintf_filtered (stream, "%o", octa1); + fprintf_filtered (stream, "%o", octa2); + fprintf_filtered (stream, "%o", octa3); + break; + + default: + error( "Internal error in octal conversion;" ); + } + + cycle++; + cycle = cycle % BITS_IN_OCTAL; + } + } + else + { + for (p = valaddr + len - 1; + p >= valaddr; + p--) + { + switch (cycle) { + case 0: + /* Carry out, no carry in */ + octa1 = (HIGH_ZERO & *p) >> 5; + octa2 = (LOW_ZERO & *p) >> 2; + carry = (CARRY_ZERO & *p); + fprintf_filtered (stream, "%o", octa1); + fprintf_filtered (stream, "%o", octa2); + break; + + case 1: + /* Carry in, carry out */ + octa1 = (carry << 1) | ((HIGH_ONE & *p) >> 7); + octa2 = (MID_ONE & *p) >> 4; + octa3 = (LOW_ONE & *p) >> 1; + carry = (CARRY_ONE & *p); + fprintf_filtered (stream, "%o", octa1); + fprintf_filtered (stream, "%o", octa2); + fprintf_filtered (stream, "%o", octa3); + break; + + case 2: + /* Carry in, no carry out */ + octa1 = (carry << 2) | ((HIGH_TWO & *p) >> 6); + octa2 = (MID_TWO & *p) >> 3; + octa3 = (LOW_TWO & *p); + carry = 0; + fprintf_filtered (stream, "%o", octa1); + fprintf_filtered (stream, "%o", octa2); + fprintf_filtered (stream, "%o", octa3); + break; + + default: + error( "Internal error in octal conversion;" ); + } + + cycle++; + cycle = cycle % BITS_IN_OCTAL; + } + } + + fprintf_filtered (stream, local_octal_format_suffix ()); +} + +/* VALADDR points to an integer of LEN bytes. + * Print it in decimal on stream or format it in buf. + */ +void +print_decimal_chars (stream, valaddr, len) + GDB_FILE *stream; + unsigned char *valaddr; + unsigned len; +{ +#define TEN 10 +#define TWO_TO_FOURTH 16 +#define CARRY_OUT( x ) ((x) / TEN) /* extend char to int */ +#define CARRY_LEFT( x ) ((x) % TEN) +#define SHIFT( x ) ((x) << 4) +#define START_P \ + ((TARGET_BYTE_ORDER == BIG_ENDIAN) ? valaddr : valaddr + len - 1) +#define NOT_END_P \ + ((TARGET_BYTE_ORDER == BIG_ENDIAN) ? (p < valaddr + len) : (p >= valaddr)) +#define NEXT_P \ + ((TARGET_BYTE_ORDER == BIG_ENDIAN) ? p++ : p-- ) +#define LOW_NIBBLE( x ) ( (x) & 0x00F) +#define HIGH_NIBBLE( x ) (((x) & 0x0F0) >> 4) + + unsigned char *p; + unsigned char *digits; + int carry; + int decimal_len; + int i, j, decimal_digits; + int dummy; + int flip; + + /* Base-ten number is less than twice as many digits + * as the base 16 number, which is 2 digits per byte. + */ + decimal_len = len * 2 * 2; + digits = (unsigned char *) malloc( decimal_len ); + if( digits == NULL ) + error( "Can't allocate memory for conversion to decimal." ); + + for( i = 0; i < decimal_len; i++ ) { + digits[i] = 0; + } + + fprintf_filtered (stream, local_decimal_format_prefix ()); + + /* Ok, we have an unknown number of bytes of data to be printed in + * decimal. + * + * Given a hex number (in nibbles) as XYZ, we start by taking X and + * decemalizing it as "x1 x2" in two decimal nibbles. Then we multiply + * the nibbles by 16, add Y and re-decimalize. Repeat with Z. + * + * The trick is that "digits" holds a base-10 number, but sometimes + * the individual digits are > 10. + * + * Outer loop is per nibble (hex digit) of input, from MSD end to + * LSD end. + */ + decimal_digits = 0; /* Number of decimal digits so far */ + p = START_P; + flip = 0; + while( NOT_END_P ) { + /* + * Multiply current base-ten number by 16 in place. + * Each digit was between 0 and 9, now is between + * 0 and 144. + */ + for( j = 0; j < decimal_digits; j++ ) { + digits[j] = SHIFT( digits[j] ); + } + + /* Take the next nibble off the input and add it to what + * we've got in the LSB position. Bottom 'digit' is now + * between 0 and 159. + * + * "flip" is used to run this loop twice for each byte. + */ + if( flip == 0 ) { + /* Take top nibble. + */ + digits[0] += HIGH_NIBBLE( *p ); + flip = 1; + } + else { + /* Take low nibble and bump our pointer "p". + */ + digits[0] += LOW_NIBBLE( *p ); + NEXT_P; + flip = 0; + } + + /* Re-decimalize. We have to do this often enough + * that we don't overflow, but once per nibble is + * overkill. Easier this way, though. Note that the + * carry is often larger than 10 (e.g. max initial + * carry out of lowest nibble is 15, could bubble all + * the way up greater than 10). So we have to do + * the carrying beyond the last current digit. + */ + carry = 0; + for( j = 0; j < decimal_len - 1; j++ ) { + digits[j] += carry; + + /* "/" won't handle an unsigned char with + * a value that if signed would be negative. + * So extend to longword int via "dummy". + */ + dummy = digits[j]; + carry = CARRY_OUT( dummy ); + digits[j] = CARRY_LEFT( dummy ); + + if( j >= decimal_digits && carry == 0 ) { + /* + * All higher digits are 0 and we + * no longer have a carry. + * + * Note: "j" is 0-based, "decimal_digits" is + * 1-based. + */ + decimal_digits = j + 1; + break; + } + } + } + + /* Ok, now "digits" is the decimal representation, with + * the "decimal_digits" actual digits. Print! + */ + for( i = decimal_digits - 1; i >= 0; i-- ) { + fprintf_filtered( stream, "%1d", digits[i] ); + } + free( digits ); + + fprintf_filtered (stream, local_decimal_format_suffix ()); +} + +/* VALADDR points to an integer of LEN bytes. Print it in hex on stream. */ + +static void +print_hex_chars (stream, valaddr, len) + GDB_FILE *stream; + unsigned char *valaddr; + unsigned len; +{ + unsigned char *p; + + /* FIXME: We should be not printing leading zeroes in most cases. */ + + fprintf_filtered (stream, local_hex_format_prefix ()); + if (TARGET_BYTE_ORDER == BIG_ENDIAN) + { + for (p = valaddr; + p < valaddr + len; + p++) + { + fprintf_filtered (stream, "%02x", *p); + } + } + else + { + for (p = valaddr + len - 1; + p >= valaddr; + p--) + { + fprintf_filtered (stream, "%02x", *p); + } + } + fprintf_filtered (stream, local_hex_format_suffix ()); +} + +/* Called by various <lang>_val_print routines to print elements of an + array in the form "<elem1>, <elem2>, <elem3>, ...". + + (FIXME?) Assumes array element separator is a comma, which is correct + for all languages currently handled. + (FIXME?) Some languages have a notation for repeated array elements, + perhaps we should try to use that notation when appropriate. + */ + +void +val_print_array_elements (type, valaddr, address, stream, format, deref_ref, + recurse, pretty, i) + struct type *type; + char *valaddr; + CORE_ADDR address; + GDB_FILE *stream; + int format; + int deref_ref; + int recurse; + enum val_prettyprint pretty; + unsigned int i; +{ + unsigned int things_printed = 0; + unsigned len; + struct type *elttype; + unsigned eltlen; + /* Position of the array element we are examining to see + whether it is repeated. */ + unsigned int rep1; + /* Number of repetitions we have detected so far. */ + unsigned int reps; + + elttype = TYPE_TARGET_TYPE (type); + eltlen = TYPE_LENGTH (check_typedef (elttype)); + len = TYPE_LENGTH (type) / eltlen; + + annotate_array_section_begin (i, elttype); + + for (; i < len && things_printed < print_max; i++) + { + if (i != 0) + { + if (prettyprint_arrays) + { + fprintf_filtered (stream, ",\n"); + print_spaces_filtered (2 + 2 * recurse, stream); + } + else + { + fprintf_filtered (stream, ", "); + } + } + wrap_here (n_spaces (2 + 2 * recurse)); + + rep1 = i + 1; + reps = 1; + while ((rep1 < len) && + !memcmp (valaddr + i * eltlen, valaddr + rep1 * eltlen, eltlen)) + { + ++reps; + ++rep1; + } + + if (reps > repeat_count_threshold) + { + val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format, + deref_ref, recurse + 1, pretty); + annotate_elt_rep (reps); + fprintf_filtered (stream, " <repeats %u times>", reps); + annotate_elt_rep_end (); + + i = rep1 - 1; + things_printed += repeat_count_threshold; + } + else + { + val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format, + deref_ref, recurse + 1, pretty); + annotate_elt (); + things_printed++; + } + } + annotate_array_section_end (); + if (i < len) + { + fprintf_filtered (stream, "..."); + } +} + +/* Print a string from the inferior, starting at ADDR and printing up to LEN + characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing + stops at the first null byte, otherwise printing proceeds (including null + bytes) until either print_max or LEN characters have been printed, + whichever is smaller. */ + +/* FIXME: Use target_read_string. */ + +int +val_print_string (addr, len, width, stream) + CORE_ADDR addr; + int len; + int width; + GDB_FILE *stream; +{ + int force_ellipsis = 0; /* Force ellipsis to be printed if nonzero. */ + int errcode; /* Errno returned from bad reads. */ + unsigned int fetchlimit; /* Maximum number of chars to print. */ + unsigned int nfetch; /* Chars to fetch / chars fetched. */ + unsigned int chunksize; /* Size of each fetch, in chars. */ + char *buffer = NULL; /* Dynamically growable fetch buffer. */ + char *bufptr; /* Pointer to next available byte in buffer. */ + char *limit; /* First location past end of fetch buffer. */ + struct cleanup *old_chain = NULL; /* Top of the old cleanup chain. */ + int found_nul; /* Non-zero if we found the nul char */ + + /* First we need to figure out the limit on the number of characters we are + going to attempt to fetch and print. This is actually pretty simple. If + LEN >= zero, then the limit is the minimum of LEN and print_max. If + LEN is -1, then the limit is print_max. This is true regardless of + whether print_max is zero, UINT_MAX (unlimited), or something in between, + because finding the null byte (or available memory) is what actually + limits the fetch. */ + + fetchlimit = (len == -1 ? print_max : min (len, print_max)); + + /* Now decide how large of chunks to try to read in one operation. This + is also pretty simple. If LEN >= zero, then we want fetchlimit chars, + so we might as well read them all in one operation. If LEN is -1, we + are looking for a null terminator to end the fetching, so we might as + well read in blocks that are large enough to be efficient, but not so + large as to be slow if fetchlimit happens to be large. So we choose the + minimum of 8 and fetchlimit. We used to use 200 instead of 8 but + 200 is way too big for remote debugging over a serial line. */ + + chunksize = (len == -1 ? min (8, fetchlimit) : fetchlimit); + + /* Loop until we either have all the characters to print, or we encounter + some error, such as bumping into the end of the address space. */ + + found_nul = 0; + old_chain = make_cleanup (null_cleanup, 0); + + if (len > 0) + { + buffer = (char *) xmalloc (len * width); + bufptr = buffer; + old_chain = make_cleanup (free, buffer); + + nfetch = target_read_memory_partial (addr, bufptr, len * width, &errcode) + / width; + addr += nfetch * width; + bufptr += nfetch * width; + } + else if (len == -1) + { + unsigned long bufsize = 0; + do + { + QUIT; + nfetch = min (chunksize, fetchlimit - bufsize); + + if (buffer == NULL) + buffer = (char *) xmalloc (nfetch * width); + else + { + discard_cleanups (old_chain); + buffer = (char *) xrealloc (buffer, (nfetch + bufsize) * width); + } + + old_chain = make_cleanup (free, buffer); + bufptr = buffer + bufsize * width; + bufsize += nfetch; + + /* Read as much as we can. */ + nfetch = target_read_memory_partial (addr, bufptr, nfetch * width, &errcode) + / width; + + /* Scan this chunk for the null byte that terminates the string + to print. If found, we don't need to fetch any more. Note + that bufptr is explicitly left pointing at the next character + after the null byte, or at the next character after the end of + the buffer. */ + + limit = bufptr + nfetch * width; + while (bufptr < limit) + { + unsigned long c; + + c = extract_unsigned_integer (bufptr, width); + addr += width; + bufptr += width; + if (c == 0) + { + /* We don't care about any error which happened after + the NULL terminator. */ + errcode = 0; + found_nul = 1; + break; + } + } + } + while (errcode == 0 /* no error */ + && bufptr - buffer < fetchlimit * width /* no overrun */ + && !found_nul); /* haven't found nul yet */ + } + else + { /* length of string is really 0! */ + buffer = bufptr = NULL; + errcode = 0; + } + + /* bufptr and addr now point immediately beyond the last byte which we + consider part of the string (including a '\0' which ends the string). */ + + /* We now have either successfully filled the buffer to fetchlimit, or + terminated early due to an error or finding a null char when LEN is -1. */ + + if (len == -1 && !found_nul) + { + char *peekbuf; + + /* We didn't find a null terminator we were looking for. Attempt + to peek at the next character. If not successful, or it is not + a null byte, then force ellipsis to be printed. */ + + peekbuf = (char *) alloca (width); + + if (target_read_memory (addr, peekbuf, width) == 0 + && extract_unsigned_integer (peekbuf, width) != 0) + force_ellipsis = 1; + } + else if ((len >= 0 && errcode != 0) || (len > (bufptr - buffer)/width)) + { + /* Getting an error when we have a requested length, or fetching less + than the number of characters actually requested, always make us + print ellipsis. */ + force_ellipsis = 1; + } + + QUIT; + + /* If we get an error before fetching anything, don't print a string. + But if we fetch something and then get an error, print the string + and then the error message. */ + if (errcode == 0 || bufptr > buffer) + { + if (addressprint) + { + fputs_filtered (" ", stream); + } + LA_PRINT_STRING (stream, buffer, (bufptr - buffer)/width, width, force_ellipsis); + } + + if (errcode != 0) + { + if (errcode == EIO) + { + fprintf_filtered (stream, " <Address "); + print_address_numeric (addr, 1, stream); + fprintf_filtered (stream, " out of bounds>"); + } + else + { + fprintf_filtered (stream, " <Error reading address "); + print_address_numeric (addr, 1, stream); + fprintf_filtered (stream, ": %s>", safe_strerror (errcode)); + } + } + gdb_flush (stream); + do_cleanups (old_chain); + return ((bufptr - buffer)/width); +} + + +/* Validate an input or output radix setting, and make sure the user + knows what they really did here. Radix setting is confusing, e.g. + setting the input radix to "10" never changes it! */ + +/* ARGSUSED */ +static void +set_input_radix (args, from_tty, c) + char *args; + int from_tty; + struct cmd_list_element *c; +{ + set_input_radix_1 (from_tty, *(unsigned *)c->var); +} + +/* ARGSUSED */ +static void +set_input_radix_1 (from_tty, radix) + int from_tty; + unsigned radix; +{ + /* We don't currently disallow any input radix except 0 or 1, which don't + make any mathematical sense. In theory, we can deal with any input + radix greater than 1, even if we don't have unique digits for every + value from 0 to radix-1, but in practice we lose on large radix values. + We should either fix the lossage or restrict the radix range more. + (FIXME). */ + + if (radix < 2) + { + error ("Nonsense input radix ``decimal %u''; input radix unchanged.", + radix); + } + input_radix = radix; + if (from_tty) + { + printf_filtered ("Input radix now set to decimal %u, hex %x, octal %o.\n", + radix, radix, radix); + } +} + +/* ARGSUSED */ +static void +set_output_radix (args, from_tty, c) + char *args; + int from_tty; + struct cmd_list_element *c; +{ + set_output_radix_1 (from_tty, *(unsigned *)c->var); +} + +static void +set_output_radix_1 (from_tty, radix) + int from_tty; + unsigned radix; +{ + /* Validate the radix and disallow ones that we aren't prepared to + handle correctly, leaving the radix unchanged. */ + switch (radix) + { + case 16: + output_format = 'x'; /* hex */ + break; + case 10: + output_format = 0; /* decimal */ + break; + case 8: + output_format = 'o'; /* octal */ + break; + default: + error ("Unsupported output radix ``decimal %u''; output radix unchanged.", + radix); + } + output_radix = radix; + if (from_tty) + { + printf_filtered ("Output radix now set to decimal %u, hex %x, octal %o.\n", + radix, radix, radix); + } +} + +/* Set both the input and output radix at once. Try to set the output radix + first, since it has the most restrictive range. An radix that is valid as + an output radix is also valid as an input radix. + + It may be useful to have an unusual input radix. If the user wishes to + set an input radix that is not valid as an output radix, he needs to use + the 'set input-radix' command. */ + +static void +set_radix (arg, from_tty) + char *arg; + int from_tty; +{ + unsigned radix; + + radix = (arg == NULL) ? 10 : parse_and_eval_address (arg); + set_output_radix_1 (0, radix); + set_input_radix_1 (0, radix); + if (from_tty) + { + printf_filtered ("Input and output radices now set to decimal %u, hex %x, octal %o.\n", + radix, radix, radix); + } +} + +/* Show both the input and output radices. */ + +/*ARGSUSED*/ +static void +show_radix (arg, from_tty) + char *arg; + int from_tty; +{ + if (from_tty) + { + if (input_radix == output_radix) + { + printf_filtered ("Input and output radices set to decimal %u, hex %x, octal %o.\n", + input_radix, input_radix, input_radix); + } + else + { + printf_filtered ("Input radix set to decimal %u, hex %x, octal %o.\n", + input_radix, input_radix, input_radix); + printf_filtered ("Output radix set to decimal %u, hex %x, octal %o.\n", + output_radix, output_radix, output_radix); + } + } +} + + +/*ARGSUSED*/ +static void +set_print (arg, from_tty) + char *arg; + int from_tty; +{ + printf_unfiltered ( +"\"set print\" must be followed by the name of a print subcommand.\n"); + help_list (setprintlist, "set print ", -1, gdb_stdout); +} + +/*ARGSUSED*/ +static void +show_print (args, from_tty) + char *args; + int from_tty; +{ + cmd_show_list (showprintlist, from_tty, ""); +} + +void +_initialize_valprint () +{ + struct cmd_list_element *c; + + add_prefix_cmd ("print", no_class, set_print, + "Generic command for setting how things print.", + &setprintlist, "set print ", 0, &setlist); + add_alias_cmd ("p", "print", no_class, 1, &setlist); + /* prefer set print to set prompt */ + add_alias_cmd ("pr", "print", no_class, 1, &setlist); + + add_prefix_cmd ("print", no_class, show_print, + "Generic command for showing print settings.", + &showprintlist, "show print ", 0, &showlist); + add_alias_cmd ("p", "print", no_class, 1, &showlist); + add_alias_cmd ("pr", "print", no_class, 1, &showlist); + + add_show_from_set + (add_set_cmd ("elements", no_class, var_uinteger, (char *)&print_max, + "Set limit on string chars or array elements to print.\n\ +\"set print elements 0\" causes there to be no limit.", + &setprintlist), + &showprintlist); + + add_show_from_set + (add_set_cmd ("null-stop", no_class, var_boolean, + (char *)&stop_print_at_null, + "Set printing of char arrays to stop at first null char.", + &setprintlist), + &showprintlist); + + add_show_from_set + (add_set_cmd ("repeats", no_class, var_uinteger, + (char *)&repeat_count_threshold, + "Set threshold for repeated print elements.\n\ +\"set print repeats 0\" causes all elements to be individually printed.", + &setprintlist), + &showprintlist); + + add_show_from_set + (add_set_cmd ("pretty", class_support, var_boolean, + (char *)&prettyprint_structs, + "Set prettyprinting of structures.", + &setprintlist), + &showprintlist); + + add_show_from_set + (add_set_cmd ("union", class_support, var_boolean, (char *)&unionprint, + "Set printing of unions interior to structures.", + &setprintlist), + &showprintlist); + + add_show_from_set + (add_set_cmd ("array", class_support, var_boolean, + (char *)&prettyprint_arrays, + "Set prettyprinting of arrays.", + &setprintlist), + &showprintlist); + + add_show_from_set + (add_set_cmd ("address", class_support, var_boolean, (char *)&addressprint, + "Set printing of addresses.", + &setprintlist), + &showprintlist); + + c = add_set_cmd ("input-radix", class_support, var_uinteger, + (char *)&input_radix, + "Set default input radix for entering numbers.", + &setlist); + add_show_from_set (c, &showlist); + c->function.sfunc = set_input_radix; + + c = add_set_cmd ("output-radix", class_support, var_uinteger, + (char *)&output_radix, + "Set default output radix for printing of values.", + &setlist); + add_show_from_set (c, &showlist); + c->function.sfunc = set_output_radix; + + /* The "set radix" and "show radix" commands are special in that they are + like normal set and show commands but allow two normally independent + variables to be either set or shown with a single command. So the + usual add_set_cmd() and add_show_from_set() commands aren't really + appropriate. */ + add_cmd ("radix", class_support, set_radix, + "Set default input and output number radices.\n\ +Use 'set input-radix' or 'set output-radix' to independently set each.\n\ +Without an argument, sets both radices back to the default value of 10.", + &setlist); + add_cmd ("radix", class_support, show_radix, + "Show the default input and output number radices.\n\ +Use 'show input-radix' or 'show output-radix' to independently show each.", + &showlist); + + /* Give people the defaults which they are used to. */ + prettyprint_structs = 0; + prettyprint_arrays = 0; + unionprint = 1; + addressprint = 1; + print_max = PRINT_MAX_DEFAULT; +} |