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630 lines
17 KiB
C
630 lines
17 KiB
C
/* Support for printing Chill values for GDB, the GNU debugger.
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Copyright 1986, 1988, 1989, 1991, 1992, 1993, 1994
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Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include "obstack.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "valprint.h"
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#include "expression.h"
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#include "value.h"
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#include "language.h"
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#include "demangle.h"
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#include "c-lang.h" /* For c_val_print */
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#include "typeprint.h"
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#include "ch-lang.h"
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#include "annotate.h"
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static void
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chill_print_value_fields PARAMS ((struct type *, char *, GDB_FILE *, int, int,
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enum val_prettyprint, struct type **));
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static void
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chill_print_type_scalar PARAMS ((struct type *, LONGEST, GDB_FILE *));
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static void
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chill_val_print_array_elements PARAMS ((struct type *, char *, CORE_ADDR, GDB_FILE *,
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int, int, int, enum val_prettyprint));
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/* Print integral scalar data VAL, of type TYPE, onto stdio stream STREAM.
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Used to print data from type structures in a specified type. For example,
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array bounds may be characters or booleans in some languages, and this
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allows the ranges to be printed in their "natural" form rather than as
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decimal integer values. */
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static void
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chill_print_type_scalar (type, val, stream)
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struct type *type;
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LONGEST val;
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GDB_FILE *stream;
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{
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switch (TYPE_CODE (type))
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{
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case TYPE_CODE_RANGE:
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if (TYPE_TARGET_TYPE (type))
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{
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chill_print_type_scalar (TYPE_TARGET_TYPE (type), val, stream);
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return;
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}
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break;
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case TYPE_CODE_UNDEF:
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case TYPE_CODE_PTR:
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case TYPE_CODE_ARRAY:
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case TYPE_CODE_STRUCT:
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case TYPE_CODE_UNION:
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case TYPE_CODE_ENUM:
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case TYPE_CODE_FUNC:
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case TYPE_CODE_INT:
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case TYPE_CODE_FLT:
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case TYPE_CODE_VOID:
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case TYPE_CODE_SET:
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case TYPE_CODE_STRING:
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case TYPE_CODE_BITSTRING:
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case TYPE_CODE_ERROR:
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case TYPE_CODE_MEMBER:
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case TYPE_CODE_METHOD:
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case TYPE_CODE_REF:
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case TYPE_CODE_CHAR:
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case TYPE_CODE_BOOL:
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case TYPE_CODE_COMPLEX:
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case TYPE_CODE_TYPEDEF:
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default:
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break;
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}
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print_type_scalar (type, val, stream);
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}
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/* Print the elements of an array.
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Similar to val_print_array_elements, but prints
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element indexes (in Chill syntax). */
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static void
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chill_val_print_array_elements (type, valaddr, address, stream,
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format, deref_ref, recurse, pretty)
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struct type *type;
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char *valaddr;
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CORE_ADDR address;
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GDB_FILE *stream;
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int format;
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int deref_ref;
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int recurse;
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enum val_prettyprint pretty;
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{
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unsigned int i = 0;
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unsigned int things_printed = 0;
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unsigned len;
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struct type *elttype;
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struct type *range_type = TYPE_FIELD_TYPE (type, 0);
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struct type *index_type = TYPE_TARGET_TYPE (range_type);
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unsigned eltlen;
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/* Position of the array element we are examining to see
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whether it is repeated. */
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unsigned int rep1;
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/* Number of repetitions we have detected so far. */
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unsigned int reps;
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LONGEST low_bound = TYPE_FIELD_BITPOS (range_type, 0);
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elttype = check_typedef (TYPE_TARGET_TYPE (type));
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eltlen = TYPE_LENGTH (elttype);
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len = TYPE_LENGTH (type) / eltlen;
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annotate_array_section_begin (i, elttype);
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for (; i < len && things_printed < print_max; i++)
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{
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if (i != 0)
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{
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if (prettyprint_arrays)
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{
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fprintf_filtered (stream, ",\n");
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print_spaces_filtered (2 + 2 * recurse, stream);
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}
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else
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{
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fprintf_filtered (stream, ", ");
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}
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}
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wrap_here (n_spaces (2 + 2 * recurse));
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rep1 = i + 1;
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reps = 1;
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while ((rep1 < len) &&
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!memcmp (valaddr + i * eltlen, valaddr + rep1 * eltlen, eltlen))
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{
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++reps;
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++rep1;
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}
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fputs_filtered ("(", stream);
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chill_print_type_scalar (index_type, low_bound + i, stream);
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if (reps > 1)
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{
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fputs_filtered (":", stream);
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chill_print_type_scalar (index_type, low_bound + i + reps - 1,
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stream);
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fputs_filtered ("): ", stream);
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val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format,
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deref_ref, recurse + 1, pretty);
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i = rep1 - 1;
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things_printed += 1;
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}
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else
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{
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fputs_filtered ("): ", stream);
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val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format,
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deref_ref, recurse + 1, pretty);
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annotate_elt ();
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things_printed++;
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}
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}
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annotate_array_section_end ();
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if (i < len)
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{
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fprintf_filtered (stream, "...");
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}
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}
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/* Print data of type TYPE located at VALADDR (within GDB), which came from
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the inferior at address ADDRESS, onto stdio stream STREAM according to
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FORMAT (a letter or 0 for natural format). The data at VALADDR is in
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target byte order.
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If the data are a string pointer, returns the number of string characters
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printed.
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If DEREF_REF is nonzero, then dereference references, otherwise just print
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them like pointers.
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The PRETTY parameter controls prettyprinting. */
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int
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chill_val_print (type, valaddr, embedded_offset, address,
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stream, format, deref_ref, recurse, pretty)
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struct type *type;
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char *valaddr;
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int embedded_offset;
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CORE_ADDR address;
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GDB_FILE *stream;
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int format;
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int deref_ref;
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int recurse;
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enum val_prettyprint pretty;
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{
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LONGEST val;
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unsigned int i = 0; /* Number of characters printed. */
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struct type *elttype;
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CORE_ADDR addr;
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CHECK_TYPEDEF (type);
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switch (TYPE_CODE (type))
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{
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case TYPE_CODE_ARRAY:
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if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
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{
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if (prettyprint_arrays)
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{
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print_spaces_filtered (2 + 2 * recurse, stream);
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}
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fprintf_filtered (stream, "[");
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chill_val_print_array_elements (type, valaddr, address, stream,
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format, deref_ref, recurse, pretty);
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fprintf_filtered (stream, "]");
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}
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else
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{
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error ("unimplemented in chill_val_print; unspecified array length");
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}
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break;
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case TYPE_CODE_INT:
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format = format ? format : output_format;
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if (format)
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{
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print_scalar_formatted (valaddr, type, format, 0, stream);
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}
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else
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{
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val_print_type_code_int (type, valaddr, stream);
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}
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break;
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case TYPE_CODE_CHAR:
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format = format ? format : output_format;
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if (format)
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{
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print_scalar_formatted (valaddr, type, format, 0, stream);
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}
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else
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{
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LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr),
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stream);
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}
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break;
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case TYPE_CODE_FLT:
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if (format)
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{
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print_scalar_formatted (valaddr, type, format, 0, stream);
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}
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else
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{
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print_floating (valaddr, type, stream);
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}
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break;
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case TYPE_CODE_BOOL:
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format = format ? format : output_format;
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if (format)
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{
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print_scalar_formatted (valaddr, type, format, 0, stream);
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}
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else
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{
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/* FIXME: Why is this using builtin_type_chill_bool not type? */
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val = unpack_long (builtin_type_chill_bool, valaddr);
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fprintf_filtered (stream, val ? "TRUE" : "FALSE");
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}
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break;
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case TYPE_CODE_UNDEF:
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/* This happens (without TYPE_FLAG_STUB set) on systems which don't use
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dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
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and no complete type for struct foo in that file. */
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fprintf_filtered (stream, "<incomplete type>");
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break;
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case TYPE_CODE_PTR:
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if (format && format != 's')
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{
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print_scalar_formatted (valaddr, type, format, 0, stream);
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break;
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}
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addr = unpack_pointer (type, valaddr);
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elttype = check_typedef (TYPE_TARGET_TYPE (type));
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/* We assume a NULL pointer is all zeros ... */
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if (addr == 0)
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{
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fputs_filtered ("NULL", stream);
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return 0;
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}
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if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
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{
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/* Try to print what function it points to. */
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print_address_demangle (addr, stream, demangle);
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/* Return value is irrelevant except for string pointers. */
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return (0);
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}
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if (addressprint && format != 's')
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{
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print_address_numeric (addr, 1, stream);
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}
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/* For a pointer to char or unsigned char, also print the string
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pointed to, unless pointer is null. */
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if (TYPE_LENGTH (elttype) == 1
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&& TYPE_CODE (elttype) == TYPE_CODE_CHAR
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&& (format == 0 || format == 's')
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&& addr != 0
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&& /* If print_max is UINT_MAX, the alloca below will fail.
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In that case don't try to print the string. */
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print_max < UINT_MAX)
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i = val_print_string (addr, -1, TYPE_LENGTH (elttype), stream);
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/* Return number of characters printed, plus one for the
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terminating null if we have "reached the end". */
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return (i + (print_max && i != print_max));
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break;
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case TYPE_CODE_STRING:
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i = TYPE_LENGTH (type);
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LA_PRINT_STRING (stream, valaddr, i, 1, 0);
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/* Return number of characters printed, plus one for the terminating
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null if we have "reached the end". */
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return (i + (print_max && i != print_max));
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break;
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case TYPE_CODE_BITSTRING:
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case TYPE_CODE_SET:
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elttype = TYPE_INDEX_TYPE (type);
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CHECK_TYPEDEF (elttype);
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if (TYPE_FLAGS (elttype) & TYPE_FLAG_STUB)
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{
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fprintf_filtered (stream, "<incomplete type>");
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gdb_flush (stream);
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break;
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}
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{
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struct type *range = elttype;
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LONGEST low_bound, high_bound;
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int i;
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int is_bitstring = TYPE_CODE (type) == TYPE_CODE_BITSTRING;
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int need_comma = 0;
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if (is_bitstring)
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fputs_filtered ("B'", stream);
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else
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fputs_filtered ("[", stream);
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i = get_discrete_bounds (range, &low_bound, &high_bound);
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maybe_bad_bstring:
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if (i < 0)
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{
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fputs_filtered ("<error value>", stream);
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goto done;
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}
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for (i = low_bound; i <= high_bound; i++)
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{
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int element = value_bit_index (type, valaddr, i);
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if (element < 0)
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{
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i = element;
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goto maybe_bad_bstring;
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}
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if (is_bitstring)
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fprintf_filtered (stream, "%d", element);
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else if (element)
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{
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if (need_comma)
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fputs_filtered (", ", stream);
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chill_print_type_scalar (range, (LONGEST) i, stream);
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need_comma = 1;
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/* Look for a continuous range of true elements. */
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if (i + 1 <= high_bound && value_bit_index (type, valaddr, ++i))
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{
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int j = i; /* j is the upper bound so far of the range */
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fputs_filtered (":", stream);
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while (i + 1 <= high_bound
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&& value_bit_index (type, valaddr, ++i))
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j = i;
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chill_print_type_scalar (range, (LONGEST) j, stream);
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}
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}
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}
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done:
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if (is_bitstring)
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fputs_filtered ("'", stream);
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else
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fputs_filtered ("]", stream);
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}
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break;
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case TYPE_CODE_STRUCT:
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if (chill_varying_type (type))
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{
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struct type *inner = check_typedef (TYPE_FIELD_TYPE (type, 1));
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long length = unpack_long (TYPE_FIELD_TYPE (type, 0), valaddr);
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char *data_addr = valaddr + TYPE_FIELD_BITPOS (type, 1) / 8;
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switch (TYPE_CODE (inner))
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{
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case TYPE_CODE_STRING:
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if (length > TYPE_LENGTH (type) - 2)
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{
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fprintf_filtered (stream,
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"<dynamic length %ld > static length %d> *invalid*",
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length, TYPE_LENGTH (type));
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/* Don't print the string; doing so might produce a
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segfault. */
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return length;
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}
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LA_PRINT_STRING (stream, data_addr, length, 1, 0);
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return length;
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default:
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break;
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}
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}
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chill_print_value_fields (type, valaddr, stream, format, recurse, pretty,
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0);
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break;
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case TYPE_CODE_REF:
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if (addressprint)
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{
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fprintf_filtered (stream, "LOC(");
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print_address_numeric
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(extract_address (valaddr, TARGET_PTR_BIT / HOST_CHAR_BIT),
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1,
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stream);
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fprintf_filtered (stream, ")");
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if (deref_ref)
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fputs_filtered (": ", stream);
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}
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/* De-reference the reference. */
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if (deref_ref)
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{
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if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_UNDEF)
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{
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value_ptr deref_val =
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value_at
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(TYPE_TARGET_TYPE (type),
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unpack_pointer (lookup_pointer_type (builtin_type_void),
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valaddr),
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NULL);
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val_print (VALUE_TYPE (deref_val),
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VALUE_CONTENTS (deref_val),
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0,
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VALUE_ADDRESS (deref_val), stream, format,
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deref_ref, recurse + 1, pretty);
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}
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else
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fputs_filtered ("???", stream);
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}
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break;
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case TYPE_CODE_ENUM:
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c_val_print (type, valaddr, 0, address, stream, format,
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deref_ref, recurse, pretty);
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break;
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case TYPE_CODE_RANGE:
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if (TYPE_TARGET_TYPE (type))
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chill_val_print (TYPE_TARGET_TYPE (type), valaddr, 0, address, stream,
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format, deref_ref, recurse, pretty);
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break;
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case TYPE_CODE_MEMBER:
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case TYPE_CODE_UNION:
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case TYPE_CODE_FUNC:
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case TYPE_CODE_VOID:
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case TYPE_CODE_ERROR:
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default:
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/* Let's defer printing to the C printer, rather than
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print an error message. FIXME! */
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c_val_print (type, valaddr, 0, address, stream, format,
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deref_ref, recurse, pretty);
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}
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gdb_flush (stream);
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return (0);
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}
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/* Mutually recursive subroutines of cplus_print_value and c_val_print to
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print out a structure's fields: cp_print_value_fields and cplus_print_value.
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TYPE, VALADDR, STREAM, RECURSE, and PRETTY have the
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same meanings as in cplus_print_value and c_val_print.
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DONT_PRINT is an array of baseclass types that we
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should not print, or zero if called from top level. */
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static void
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chill_print_value_fields (type, valaddr, stream, format, recurse, pretty,
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dont_print)
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struct type *type;
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char *valaddr;
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GDB_FILE *stream;
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int format;
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int recurse;
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enum val_prettyprint pretty;
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struct type **dont_print;
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{
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int i, len;
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int fields_seen = 0;
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CHECK_TYPEDEF (type);
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fprintf_filtered (stream, "[");
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len = TYPE_NFIELDS (type);
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if (len == 0)
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{
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fprintf_filtered (stream, "<No data fields>");
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}
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else
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{
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for (i = 0; i < len; i++)
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{
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if (fields_seen)
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||
{
|
||
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));
|
||
}
|