571 lines
15 KiB
C
571 lines
15 KiB
C
/* Support for printing Modula 2 types for GDB, the GNU debugger.
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Copyright (C) 1986, 1988, 1989, 1991, 1992, 1995, 2000, 2001, 2002, 2003,
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2004, 2005, 2006, 2007 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., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#include "defs.h"
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#include "gdb_obstack.h"
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#include "bfd.h" /* Binary File Description */
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "expression.h"
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#include "value.h"
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#include "gdbcore.h"
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#include "m2-lang.h"
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#include "target.h"
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#include "language.h"
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#include "demangle.h"
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#include "c-lang.h"
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#include "typeprint.h"
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#include "cp-abi.h"
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#include "gdb_string.h"
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#include <errno.h>
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static void m2_print_bounds (struct type *type,
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struct ui_file *stream, int show, int level,
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int print_high);
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static void m2_typedef (struct type *, struct ui_file *, int, int);
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static void m2_array (struct type *, struct ui_file *, int, int);
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static void m2_pointer (struct type *, struct ui_file *, int, int);
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static void m2_ref (struct type *, struct ui_file *, int, int);
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static void m2_procedure (struct type *, struct ui_file *, int, int);
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static void m2_union (struct type *, struct ui_file *);
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static void m2_enum (struct type *, struct ui_file *, int, int);
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static void m2_range (struct type *, struct ui_file *, int, int);
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static void m2_type_name (struct type *type, struct ui_file *stream);
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static void m2_short_set (struct type *type, struct ui_file *stream,
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int show, int level);
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static int m2_long_set (struct type *type, struct ui_file *stream,
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int show, int level);
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static void m2_record_fields (struct type *type, struct ui_file *stream,
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int show, int level);
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static void m2_unknown (const char *s, struct type *type,
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struct ui_file *stream, int show, int level);
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int m2_is_long_set (struct type *type);
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int m2_is_long_set_of_type (struct type *type, struct type **of_type);
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void
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m2_print_type (struct type *type, char *varstring, struct ui_file *stream,
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int show, int level)
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{
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enum type_code code;
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int demangled_args;
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CHECK_TYPEDEF (type);
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code = TYPE_CODE (type);
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QUIT;
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wrap_here (" ");
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if (type == NULL)
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{
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fputs_filtered (_("<type unknown>"), stream);
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return;
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}
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switch (TYPE_CODE (type))
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{
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case TYPE_CODE_SET:
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m2_short_set(type, stream, show, level);
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break;
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case TYPE_CODE_STRUCT:
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if (m2_long_set (type, stream, show, level))
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break;
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m2_record_fields (type, stream, show, level);
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break;
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case TYPE_CODE_TYPEDEF:
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m2_typedef (type, stream, show, level);
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break;
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case TYPE_CODE_ARRAY:
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m2_array (type, stream, show, level);
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break;
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case TYPE_CODE_PTR:
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m2_pointer (type, stream, show, level);
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break;
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case TYPE_CODE_REF:
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m2_ref (type, stream, show, level);
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break;
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case TYPE_CODE_METHOD:
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m2_unknown (_("method"), type, stream, show, level);
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break;
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case TYPE_CODE_FUNC:
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m2_procedure (type, stream, show, level);
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break;
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case TYPE_CODE_UNION:
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m2_union (type, stream);
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break;
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case TYPE_CODE_ENUM:
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m2_enum (type, stream, show, level);
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break;
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case TYPE_CODE_VOID:
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break;
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case TYPE_CODE_UNDEF:
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/* i18n: Do not translate the "struct" part! */
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m2_unknown (_("undef"), type, stream, show, level);
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break;
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case TYPE_CODE_ERROR:
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m2_unknown (_("error"), type, stream, show, level);
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break;
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case TYPE_CODE_RANGE:
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m2_range (type, stream, show, level);
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break;
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case TYPE_CODE_TEMPLATE:
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break;
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default:
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m2_type_name (type, stream);
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break;
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}
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}
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/*
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* m2_type_name - if a, type, has a name then print it.
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*/
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void
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m2_type_name (struct type *type, struct ui_file *stream)
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{
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if (TYPE_NAME (type) != NULL)
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fputs_filtered (TYPE_NAME (type), stream);
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}
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/*
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* m2_range - displays a Modula-2 subrange type.
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*/
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void
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m2_range (struct type *type, struct ui_file *stream, int show,
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int level)
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{
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if (TYPE_HIGH_BOUND (type) == TYPE_LOW_BOUND (type))
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m2_print_type (TYPE_DOMAIN_TYPE (type), "", stream, show, level);
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else
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{
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struct type *target = TYPE_TARGET_TYPE (type);
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fprintf_filtered (stream, "[");
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print_type_scalar (target, TYPE_LOW_BOUND (type), stream);
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fprintf_filtered (stream, "..");
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print_type_scalar (target, TYPE_HIGH_BOUND (type), stream);
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fprintf_filtered (stream, "]");
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}
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}
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static void
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m2_typedef (struct type *type, struct ui_file *stream, int show,
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int level)
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{
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if (TYPE_NAME (type) != NULL)
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{
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fputs_filtered (TYPE_NAME (type), stream);
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fputs_filtered (" = ", stream);
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}
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m2_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level);
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}
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/*
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* m2_array - prints out a Modula-2 ARRAY ... OF type
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*/
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static void m2_array (struct type *type, struct ui_file *stream,
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int show, int level)
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{
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fprintf_filtered (stream, "ARRAY [");
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if (TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0
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&& TYPE_ARRAY_UPPER_BOUND_TYPE (type) != BOUND_CANNOT_BE_DETERMINED)
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{
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if (TYPE_INDEX_TYPE (type) != 0)
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{
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m2_print_bounds (TYPE_INDEX_TYPE (type), stream, show, -1, 0);
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fprintf_filtered (stream, "..");
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m2_print_bounds (TYPE_INDEX_TYPE (type), stream, show, -1, 1);
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}
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else
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fprintf_filtered (stream, "%d",
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(TYPE_LENGTH (type)
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/ TYPE_LENGTH (TYPE_TARGET_TYPE (type))));
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}
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fprintf_filtered (stream, "] OF ");
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m2_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level);
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}
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static void
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m2_pointer (struct type *type, struct ui_file *stream, int show,
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int level)
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{
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if (TYPE_CONST (type))
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fprintf_filtered (stream, "[...] : ");
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else
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fprintf_filtered (stream, "POINTER TO ");
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m2_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level);
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}
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static void
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m2_ref (struct type *type, struct ui_file *stream, int show,
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int level)
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{
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fprintf_filtered (stream, "VAR");
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m2_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level);
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}
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static void
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m2_unknown (const char *s, struct type *type, struct ui_file *stream,
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int show, int level)
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{
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fprintf_filtered (stream, "%s %s", s, _("is unknown"));
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}
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static void m2_union (struct type *type, struct ui_file *stream)
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{
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fprintf_filtered (stream, "union");
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}
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static void
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m2_procedure (struct type *type, struct ui_file *stream,
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int show, int level)
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{
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fprintf_filtered (stream, "PROCEDURE ");
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m2_type_name (type, stream);
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if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_VOID)
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{
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int i, len = TYPE_NFIELDS (type);
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fprintf_filtered (stream, " (");
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for (i = 0; i < len; i++)
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{
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if (i > 0)
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{
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fputs_filtered (", ", stream);
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wrap_here (" ");
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}
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m2_print_type (TYPE_FIELD_TYPE (type, i), "", stream, -1, 0);
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}
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if (TYPE_TARGET_TYPE (type) != NULL)
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{
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fprintf_filtered (stream, " : ");
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m2_print_type (TYPE_TARGET_TYPE (type), "", stream, 0, 0);
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}
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}
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}
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static void
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m2_print_bounds (struct type *type,
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struct ui_file *stream, int show, int level,
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int print_high)
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{
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struct type *target = TYPE_TARGET_TYPE (type);
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if (target == NULL)
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target = builtin_type_int;
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if (TYPE_NFIELDS(type) == 0)
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return;
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if (print_high)
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print_type_scalar (target, TYPE_HIGH_BOUND (type), stream);
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else
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print_type_scalar (target, TYPE_LOW_BOUND (type), stream);
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}
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static void
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m2_short_set (struct type *type, struct ui_file *stream, int show, int level)
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{
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fprintf_filtered(stream, "SET [");
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m2_print_bounds (TYPE_INDEX_TYPE (type), stream,
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show - 1, level, 0);
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fprintf_filtered(stream, "..");
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m2_print_bounds (TYPE_INDEX_TYPE (type), stream,
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show - 1, level, 1);
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fprintf_filtered(stream, "]");
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}
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int
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m2_is_long_set (struct type *type)
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{
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LONGEST previous_high = 0; /* unnecessary initialization
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keeps gcc -Wall happy */
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int len, i;
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struct type *range;
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if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
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{
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/*
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* check if all fields of the RECORD are consecutive sets
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*/
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len = TYPE_NFIELDS (type);
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for (i = TYPE_N_BASECLASSES (type); i < len; i++)
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{
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if (TYPE_FIELD_TYPE (type, i) == NULL)
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return 0;
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if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) != TYPE_CODE_SET)
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return 0;
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if (TYPE_FIELD_NAME (type, i) != NULL
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&& (strcmp (TYPE_FIELD_NAME (type, i), "") != 0))
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return 0;
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range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i));
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if ((i > TYPE_N_BASECLASSES (type))
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&& previous_high + 1 != TYPE_LOW_BOUND (range))
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return 0;
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previous_high = TYPE_HIGH_BOUND (range);
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}
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return len>0;
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}
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return 0;
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}
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/*
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* m2_get_discrete_bounds - a wrapper for get_discrete_bounds which
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* understands that CHARs might be signed.
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* This should be integrated into gdbtypes.c
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* inside get_discrete_bounds.
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*/
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int
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m2_get_discrete_bounds (struct type *type, LONGEST *lowp, LONGEST *highp)
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{
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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_CHAR:
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if (TYPE_LENGTH (type) < sizeof (LONGEST))
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{
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if (!TYPE_UNSIGNED (type))
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{
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*lowp = -(1 << (TYPE_LENGTH (type) * TARGET_CHAR_BIT - 1));
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*highp = -*lowp - 1;
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return 0;
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}
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}
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/* fall through */
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default:
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return get_discrete_bounds (type, lowp, highp);
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}
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}
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/*
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* m2_is_long_set_of_type - returns TRUE if the long set was declared as
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* SET OF <oftype> of_type is assigned to the
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* subtype.
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*/
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int
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m2_is_long_set_of_type (struct type *type, struct type **of_type)
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{
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int len, i;
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struct type *range;
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struct type *target;
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LONGEST l1, l2;
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LONGEST h1, h2;
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if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
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{
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len = TYPE_NFIELDS (type);
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i = TYPE_N_BASECLASSES (type);
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if (len == 0)
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return 0;
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range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i));
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target = TYPE_TARGET_TYPE (range);
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if (target == NULL)
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target = builtin_type_int;
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l1 = TYPE_LOW_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)));
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h1 = TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, len-1)));
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*of_type = target;
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if (m2_get_discrete_bounds (target, &l2, &h2) >= 0)
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return (l1 == l2 && h1 == h2);
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error (_("long_set failed to find discrete bounds for its subtype"));
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return 0;
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}
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error (_("expecting long_set"));
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return 0;
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}
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static int
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m2_long_set (struct type *type, struct ui_file *stream, int show, int level)
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{
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struct type *index_type;
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struct type *range_type;
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struct type *of_type;
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int i;
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int len = TYPE_NFIELDS (type);
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LONGEST low;
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LONGEST high;
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if (m2_is_long_set (type))
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{
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if (TYPE_TAG_NAME (type) != NULL)
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{
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fputs_filtered (TYPE_TAG_NAME (type), stream);
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if (show == 0)
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return 1;
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}
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else if (TYPE_NAME (type) != NULL)
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{
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fputs_filtered (TYPE_NAME (type), stream);
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if (show == 0)
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return 1;
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}
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if (TYPE_TAG_NAME (type) != NULL || TYPE_NAME (type) != NULL)
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fputs_filtered (" = ", stream);
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if (get_long_set_bounds (type, &low, &high))
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{
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fprintf_filtered(stream, "SET OF ");
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i = TYPE_N_BASECLASSES (type);
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if (m2_is_long_set_of_type (type, &of_type))
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m2_print_type (of_type, "", stream, show - 1, level);
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else
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{
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fprintf_filtered(stream, "[");
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m2_print_bounds (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)),
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stream, show - 1, level, 0);
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fprintf_filtered(stream, "..");
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m2_print_bounds (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, len-1)),
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stream, show - 1, level, 1);
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fprintf_filtered(stream, "]");
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}
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}
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else
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/* i18n: Do not translate the "SET OF" part! */
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fprintf_filtered(stream, _("SET OF <unknown>"));
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return 1;
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}
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return 0;
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}
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void
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m2_record_fields (struct type *type, struct ui_file *stream, int show,
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int level)
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{
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/* Print the tag if it exists.
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*/
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if (TYPE_TAG_NAME (type) != NULL)
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{
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if (strncmp (TYPE_TAG_NAME (type), "$$", 2) != 0)
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{
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fputs_filtered (TYPE_TAG_NAME (type), stream);
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if (show > 0)
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fprintf_filtered (stream, " = ");
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}
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}
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wrap_here (" ");
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if (show < 0)
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{
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if (TYPE_CODE (type) == DECLARED_TYPE_STRUCT)
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fprintf_filtered (stream, "RECORD ... END ");
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else if (TYPE_DECLARED_TYPE (type) == DECLARED_TYPE_UNION)
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fprintf_filtered (stream, "CASE ... END ");
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}
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else if (show > 0)
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{
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int i;
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int len = TYPE_NFIELDS (type);
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if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
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fprintf_filtered (stream, "RECORD\n");
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else if (TYPE_CODE (type) == TYPE_CODE_UNION)
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/* i18n: Do not translate "CASE" and "OF" */
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fprintf_filtered (stream, _("CASE <variant> OF\n"));
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for (i = TYPE_N_BASECLASSES (type); i < len; i++)
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{
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QUIT;
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print_spaces_filtered (level + 4, stream);
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fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
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fputs_filtered (" : ", stream);
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m2_print_type (TYPE_FIELD_TYPE (type, i),
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"",
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stream, 0, level + 4);
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if (TYPE_FIELD_PACKED (type, i))
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{
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/* It is a bitfield. This code does not attempt
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to look at the bitpos and reconstruct filler,
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unnamed fields. This would lead to misleading
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results if the compiler does not put out fields
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for such things (I don't know what it does). */
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|
fprintf_filtered (stream, " : %d",
|
|
TYPE_FIELD_BITSIZE (type, i));
|
|
}
|
|
fprintf_filtered (stream, ";\n");
|
|
}
|
|
|
|
fprintfi_filtered (level, stream, "END ");
|
|
}
|
|
}
|
|
|
|
void
|
|
m2_enum (struct type *type, struct ui_file *stream, int show, int level)
|
|
{
|
|
int lastval, i, len;
|
|
|
|
if (show < 0)
|
|
{
|
|
/* If we just printed a tag name, no need to print anything else. */
|
|
if (TYPE_TAG_NAME (type) == NULL)
|
|
fprintf_filtered (stream, "(...)");
|
|
}
|
|
else if (show > 0 || TYPE_TAG_NAME (type) == NULL)
|
|
{
|
|
fprintf_filtered (stream, "(");
|
|
len = TYPE_NFIELDS (type);
|
|
lastval = 0;
|
|
for (i = 0; i < len; i++)
|
|
{
|
|
QUIT;
|
|
if (i > 0)
|
|
fprintf_filtered (stream, ", ");
|
|
wrap_here (" ");
|
|
fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
|
|
if (lastval != TYPE_FIELD_BITPOS (type, i))
|
|
{
|
|
fprintf_filtered (stream, " = %d", TYPE_FIELD_BITPOS (type, i));
|
|
lastval = TYPE_FIELD_BITPOS (type, i);
|
|
}
|
|
lastval++;
|
|
}
|
|
fprintf_filtered (stream, ")");
|
|
}
|
|
}
|