diff options
Diffstat (limited to 'gdb/ch-valprint.c')
| -rw-r--r-- | gdb/ch-valprint.c | 630 |
1 files changed, 630 insertions, 0 deletions
diff --git a/gdb/ch-valprint.c b/gdb/ch-valprint.c new file mode 100644 index 00000000000..663ba6428c1 --- /dev/null +++ b/gdb/ch-valprint.c @@ -0,0 +1,630 @@ +/* Support for printing Chill values for GDB, the GNU debugger. + Copyright 1986, 1988, 1989, 1991, 1992, 1993, 1994 + 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 "obstack.h" +#include "symtab.h" +#include "gdbtypes.h" +#include "valprint.h" +#include "expression.h" +#include "value.h" +#include "language.h" +#include "demangle.h" +#include "c-lang.h" /* For c_val_print */ +#include "typeprint.h" +#include "ch-lang.h" +#include "annotate.h" + +static void +chill_print_value_fields PARAMS ((struct type *, char *, GDB_FILE *, int, int, + enum val_prettyprint, struct type **)); + +static void +chill_print_type_scalar PARAMS ((struct type *, LONGEST, GDB_FILE *)); + +static void +chill_val_print_array_elements PARAMS ((struct type *, char *, CORE_ADDR, GDB_FILE *, + int, int, int, enum val_prettyprint)); + + +/* Print integral scalar data VAL, of type TYPE, onto stdio stream STREAM. + Used to print data from type structures in a specified type. For example, + array bounds may be characters or booleans in some languages, and this + allows the ranges to be printed in their "natural" form rather than as + decimal integer values. */ + +static void +chill_print_type_scalar (type, val, stream) + struct type *type; + LONGEST val; + GDB_FILE *stream; +{ + switch (TYPE_CODE (type)) + { + case TYPE_CODE_RANGE: + if (TYPE_TARGET_TYPE (type)) + { + chill_print_type_scalar (TYPE_TARGET_TYPE (type), val, stream); + return; + } + break; + case TYPE_CODE_UNDEF: + case TYPE_CODE_PTR: + case TYPE_CODE_ARRAY: + case TYPE_CODE_STRUCT: + case TYPE_CODE_UNION: + case TYPE_CODE_ENUM: + case TYPE_CODE_FUNC: + case TYPE_CODE_INT: + case TYPE_CODE_FLT: + case TYPE_CODE_VOID: + case TYPE_CODE_SET: + case TYPE_CODE_STRING: + case TYPE_CODE_BITSTRING: + case TYPE_CODE_ERROR: + case TYPE_CODE_MEMBER: + case TYPE_CODE_METHOD: + case TYPE_CODE_REF: + case TYPE_CODE_CHAR: + case TYPE_CODE_BOOL: + case TYPE_CODE_COMPLEX: + case TYPE_CODE_TYPEDEF: + default: + break; + } + print_type_scalar (type, val, stream); +} + +/* Print the elements of an array. + Similar to val_print_array_elements, but prints + element indexes (in Chill syntax). */ + +static void +chill_val_print_array_elements (type, valaddr, address, stream, + format, deref_ref, recurse, pretty) + 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 = 0; + unsigned int things_printed = 0; + unsigned len; + struct type *elttype; + struct type *range_type = TYPE_FIELD_TYPE (type, 0); + struct type *index_type = TYPE_TARGET_TYPE (range_type); + 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; + LONGEST low_bound = TYPE_FIELD_BITPOS (range_type, 0); + + elttype = check_typedef (TYPE_TARGET_TYPE (type)); + eltlen = TYPE_LENGTH (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; + } + + fputs_filtered ("(", stream); + chill_print_type_scalar (index_type, low_bound + i, stream); + if (reps > 1) + { + fputs_filtered (":", stream); + chill_print_type_scalar (index_type, low_bound + i + reps - 1, + stream); + fputs_filtered ("): ", stream); + val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format, + deref_ref, recurse + 1, pretty); + + i = rep1 - 1; + things_printed += 1; + } + else + { + fputs_filtered ("): ", stream); + 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 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). The data at VALADDR is in + target byte order. + + If the data are a string pointer, returns the number of string characters + printed. + + If DEREF_REF is nonzero, then dereference references, otherwise just print + them like pointers. + + The PRETTY parameter controls prettyprinting. */ + +int +chill_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; +{ + LONGEST val; + unsigned int i = 0; /* Number of characters printed. */ + struct type *elttype; + CORE_ADDR addr; + + CHECK_TYPEDEF (type); + + switch (TYPE_CODE (type)) + { + case TYPE_CODE_ARRAY: + if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0) + { + if (prettyprint_arrays) + { + print_spaces_filtered (2 + 2 * recurse, stream); + } + fprintf_filtered (stream, "["); + chill_val_print_array_elements (type, valaddr, address, stream, + format, deref_ref, recurse, pretty); + fprintf_filtered (stream, "]"); + } + else + { + error ("unimplemented in chill_val_print; unspecified array length"); + } + break; + + case TYPE_CODE_INT: + format = format ? format : output_format; + if (format) + { + print_scalar_formatted (valaddr, type, format, 0, stream); + } + else + { + val_print_type_code_int (type, valaddr, stream); + } + break; + + case TYPE_CODE_CHAR: + format = format ? format : output_format; + if (format) + { + print_scalar_formatted (valaddr, type, format, 0, stream); + } + else + { + LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr), + stream); + } + break; + + case TYPE_CODE_FLT: + if (format) + { + print_scalar_formatted (valaddr, type, format, 0, stream); + } + else + { + print_floating (valaddr, type, stream); + } + break; + + case TYPE_CODE_BOOL: + format = format ? format : output_format; + if (format) + { + print_scalar_formatted (valaddr, type, format, 0, stream); + } + else + { + /* FIXME: Why is this using builtin_type_chill_bool not type? */ + val = unpack_long (builtin_type_chill_bool, valaddr); + fprintf_filtered (stream, val ? "TRUE" : "FALSE"); + } + break; + + case TYPE_CODE_UNDEF: + /* This happens (without TYPE_FLAG_STUB set) on systems which don't use + dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar" + and no complete type for struct foo in that file. */ + fprintf_filtered (stream, "<incomplete type>"); + break; + + case TYPE_CODE_PTR: + if (format && format != 's') + { + print_scalar_formatted (valaddr, type, format, 0, stream); + break; + } + addr = unpack_pointer (type, valaddr); + elttype = check_typedef (TYPE_TARGET_TYPE (type)); + + /* We assume a NULL pointer is all zeros ... */ + if (addr == 0) + { + fputs_filtered ("NULL", stream); + return 0; + } + + if (TYPE_CODE (elttype) == TYPE_CODE_FUNC) + { + /* Try to print what function it points to. */ + print_address_demangle (addr, stream, demangle); + /* Return value is irrelevant except for string pointers. */ + return (0); + } + if (addressprint && format != 's') + { + print_address_numeric (addr, 1, stream); + } + + /* For a pointer to char or unsigned char, also print the string + pointed to, unless pointer is null. */ + if (TYPE_LENGTH (elttype) == 1 + && TYPE_CODE (elttype) == TYPE_CODE_CHAR + && (format == 0 || format == 's') + && addr != 0 + && /* If print_max is UINT_MAX, the alloca below will fail. + In that case don't try to print the string. */ + print_max < UINT_MAX) + i = val_print_string (addr, -1, TYPE_LENGTH (elttype), stream); + + /* Return number of characters printed, plus one for the + terminating null if we have "reached the end". */ + return (i + (print_max && i != print_max)); + break; + + case TYPE_CODE_STRING: + i = TYPE_LENGTH (type); + LA_PRINT_STRING (stream, valaddr, i, 1, 0); + /* Return number of characters printed, plus one for the terminating + null if we have "reached the end". */ + return (i + (print_max && i != print_max)); + break; + + case TYPE_CODE_BITSTRING: + case TYPE_CODE_SET: + elttype = TYPE_INDEX_TYPE (type); + CHECK_TYPEDEF (elttype); + if (TYPE_FLAGS (elttype) & TYPE_FLAG_STUB) + { + fprintf_filtered (stream, "<incomplete type>"); + gdb_flush (stream); + break; + } + { + struct type *range = elttype; + LONGEST low_bound, high_bound; + int i; + int is_bitstring = TYPE_CODE (type) == TYPE_CODE_BITSTRING; + int need_comma = 0; + + if (is_bitstring) + fputs_filtered ("B'", stream); + else + fputs_filtered ("[", stream); + + i = get_discrete_bounds (range, &low_bound, &high_bound); + maybe_bad_bstring: + if (i < 0) + { + fputs_filtered ("<error value>", stream); + goto done; + } + + for (i = low_bound; i <= high_bound; i++) + { + int element = value_bit_index (type, valaddr, i); + if (element < 0) + { + i = element; + goto maybe_bad_bstring; + } + if (is_bitstring) + fprintf_filtered (stream, "%d", element); + else if (element) + { + if (need_comma) + fputs_filtered (", ", stream); + chill_print_type_scalar (range, (LONGEST) i, stream); + need_comma = 1; + + /* Look for a continuous range of true elements. */ + if (i+1 <= high_bound && value_bit_index (type, valaddr, ++i)) + { + int j = i; /* j is the upper bound so far of the range */ + fputs_filtered (":", stream); + while (i+1 <= high_bound + && value_bit_index (type, valaddr, ++i)) + j = i; + chill_print_type_scalar (range, (LONGEST) j, stream); + } + } + } + done: + if (is_bitstring) + fputs_filtered ("'", stream); + else + fputs_filtered ("]", stream); + } + break; + + case TYPE_CODE_STRUCT: + if (chill_varying_type (type)) + { + struct type *inner = check_typedef (TYPE_FIELD_TYPE (type, 1)); + long length = unpack_long (TYPE_FIELD_TYPE (type, 0), valaddr); + char *data_addr = valaddr + TYPE_FIELD_BITPOS (type, 1) / 8; + + switch (TYPE_CODE (inner)) + { + case TYPE_CODE_STRING: + if (length > TYPE_LENGTH (type) - 2) + { + fprintf_filtered (stream, + "<dynamic length %ld > static length %d> *invalid*", + length, TYPE_LENGTH (type)); + + /* Don't print the string; doing so might produce a + segfault. */ + return length; + } + LA_PRINT_STRING (stream, data_addr, length, 1, 0); + return length; + default: + break; + } + } + chill_print_value_fields (type, valaddr, stream, format, recurse, pretty, + 0); + break; + + case TYPE_CODE_REF: + if (addressprint) + { + fprintf_filtered (stream, "LOC("); + print_address_numeric + (extract_address (valaddr, TARGET_PTR_BIT / HOST_CHAR_BIT), + 1, + stream); + fprintf_filtered (stream, ")"); + if (deref_ref) + fputs_filtered (": ", stream); + } + /* De-reference the reference. */ + if (deref_ref) + { + if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_UNDEF) + { + value_ptr deref_val = + value_at + (TYPE_TARGET_TYPE (type), + unpack_pointer (lookup_pointer_type (builtin_type_void), + valaddr), + NULL); + val_print (VALUE_TYPE (deref_val), + VALUE_CONTENTS (deref_val), + 0, + VALUE_ADDRESS (deref_val), stream, format, + deref_ref, recurse + 1, pretty); + } + else + fputs_filtered ("???", stream); + } + break; + + case TYPE_CODE_ENUM: + c_val_print (type, valaddr, 0, address, stream, format, + deref_ref, recurse, pretty); + break; + + case TYPE_CODE_RANGE: + if (TYPE_TARGET_TYPE (type)) + chill_val_print (TYPE_TARGET_TYPE (type), valaddr, 0, address, stream, + format, deref_ref, recurse, pretty); + break; + + case TYPE_CODE_MEMBER: + case TYPE_CODE_UNION: + case TYPE_CODE_FUNC: + case TYPE_CODE_VOID: + case TYPE_CODE_ERROR: + default: + /* Let's defer printing to the C printer, rather than + print an error message. FIXME! */ + c_val_print (type, valaddr, 0, address, stream, format, + deref_ref, recurse, pretty); + } + gdb_flush (stream); + return (0); +} + +/* Mutually recursive subroutines of cplus_print_value and c_val_print to + print out a structure's fields: cp_print_value_fields and cplus_print_value. + + TYPE, VALADDR, STREAM, RECURSE, and PRETTY have the + same meanings as in cplus_print_value and c_val_print. + + DONT_PRINT is an array of baseclass types that we + should not print, or zero if called from top level. */ + +static void +chill_print_value_fields (type, valaddr, stream, format, recurse, pretty, + dont_print) + struct type *type; + char *valaddr; + GDB_FILE *stream; + int format; + int recurse; + enum val_prettyprint pretty; + struct type **dont_print; +{ + int i, len; + int fields_seen = 0; + + CHECK_TYPEDEF (type); + + fprintf_filtered (stream, "["); + len = TYPE_NFIELDS (type); + if (len == 0) + { + fprintf_filtered (stream, "<No data fields>"); + } + else + { + for (i = 0; i < len; i++) + { + if (fields_seen) + { + fprintf_filtered (stream, ", "); + } + fields_seen = 1; + if (pretty) + { + fprintf_filtered (stream, "\n"); + print_spaces_filtered (2 + 2 * recurse, stream); + } + else + { + wrap_here (n_spaces (2 + 2 * recurse)); + } + fputs_filtered (".", stream); + fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i), + language_chill, DMGL_NO_OPTS); + fputs_filtered (": ", stream); + if (TYPE_FIELD_PACKED (type, i)) + { + value_ptr v; + + /* Bitfields require special handling, especially due to byte + order problems. */ + v = value_from_longest (TYPE_FIELD_TYPE (type, i), + unpack_field_as_long (type, valaddr, i)); + + chill_val_print (TYPE_FIELD_TYPE (type, i), VALUE_CONTENTS (v), 0, 0, + stream, format, 0, recurse + 1, pretty); + } + else + { + chill_val_print (TYPE_FIELD_TYPE (type, i), + valaddr + TYPE_FIELD_BITPOS (type, i) / 8, 0, + 0, stream, format, 0, recurse + 1, pretty); + } + } + if (pretty) + { + fprintf_filtered (stream, "\n"); + print_spaces_filtered (2 * recurse, stream); + } + } + fprintf_filtered (stream, "]"); +} + +int +chill_value_print (val, stream, format, pretty) + value_ptr val; + GDB_FILE *stream; + int format; + enum val_prettyprint pretty; +{ + struct type *type = VALUE_TYPE (val); + struct type *real_type = check_typedef (type); + + /* If it is a pointer, indicate what it points to. + + Print type also if it is a reference. */ + + if (TYPE_CODE (real_type) == TYPE_CODE_PTR || + TYPE_CODE (real_type) == TYPE_CODE_REF) + { + char *valaddr = VALUE_CONTENTS (val); + CORE_ADDR addr = unpack_pointer (type, valaddr); + if (TYPE_CODE (type) != TYPE_CODE_PTR || addr != 0) + { + int i; + char *name = TYPE_NAME (type); + if (name) + fputs_filtered (name, stream); + else if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_VOID) + fputs_filtered ("PTR", stream); + else + { + fprintf_filtered (stream, "("); + type_print (type, "", stream, -1); + fprintf_filtered (stream, ")"); + } + fprintf_filtered (stream, "("); + i = val_print (type, valaddr, 0, VALUE_ADDRESS (val), + stream, format, 1, 0, pretty); + fprintf_filtered (stream, ")"); + return i; + } + } + return (val_print (type, VALUE_CONTENTS (val), 0, + VALUE_ADDRESS (val), stream, format, 1, 0, pretty)); +} + + |