/* Support for printing Modula 2 types for GDB, the GNU debugger.
- Copyright 1986, 1988, 1989, 1991 Free Software Foundation, Inc.
+ Copyright (C) 1986-2020 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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "obstack.h"
+#include "gdb_obstack.h"
#include "bfd.h" /* Binary File Description */
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "value.h"
#include "gdbcore.h"
+#include "m2-lang.h"
#include "target.h"
-#include "command.h"
-#include "gdbcmd.h"
#include "language.h"
#include "demangle.h"
-#include "m2-lang.h"
+#include "c-lang.h"
+#include "typeprint.h"
+#include "cp-abi.h"
+#include "cli/cli-style.h"
+
+static void m2_print_bounds (struct type *type,
+ struct ui_file *stream, int show, int level,
+ int print_high);
+
+static void m2_typedef (struct type *, struct ui_file *, int, int,
+ const struct type_print_options *);
+static void m2_array (struct type *, struct ui_file *, int, int,
+ const struct type_print_options *);
+static void m2_pointer (struct type *, struct ui_file *, int, int,
+ const struct type_print_options *);
+static void m2_ref (struct type *, struct ui_file *, int, int,
+ const struct type_print_options *);
+static void m2_procedure (struct type *, struct ui_file *, int, int,
+ const struct type_print_options *);
+static void m2_union (struct type *, struct ui_file *);
+static void m2_enum (struct type *, struct ui_file *, int, int);
+static void m2_range (struct type *, struct ui_file *, int, int,
+ const struct type_print_options *);
+static void m2_type_name (struct type *type, struct ui_file *stream);
+static void m2_short_set (struct type *type, struct ui_file *stream,
+ int show, int level);
+static int m2_long_set (struct type *type, struct ui_file *stream,
+ int show, int level, const struct type_print_options *flags);
+static int m2_unbounded_array (struct type *type, struct ui_file *stream,
+ int show, int level,
+ const struct type_print_options *flags);
+static void m2_record_fields (struct type *type, struct ui_file *stream,
+ int show, int level, const struct type_print_options *flags);
+static void m2_unknown (const char *s, struct type *type,
+ struct ui_file *stream, int show, int level);
+
+int m2_is_long_set (struct type *type);
+int m2_is_long_set_of_type (struct type *type, struct type **of_type);
+int m2_is_unbounded_array (struct type *type);
+
+
+void
+m2_print_type (struct type *type, const char *varstring,
+ struct ui_file *stream,
+ int show, int level,
+ const struct type_print_options *flags)
+{
+ type = check_typedef (type);
+
+ QUIT;
+
+ wrap_here (" ");
+ if (type == NULL)
+ {
+ fputs_styled (_("<type unknown>"), metadata_style.style (), stream);
+ return;
+ }
+
+ switch (type->code ())
+ {
+ case TYPE_CODE_SET:
+ m2_short_set(type, stream, show, level);
+ break;
+
+ case TYPE_CODE_STRUCT:
+ if (m2_long_set (type, stream, show, level, flags)
+ || m2_unbounded_array (type, stream, show, level, flags))
+ break;
+ m2_record_fields (type, stream, show, level, flags);
+ break;
+
+ case TYPE_CODE_TYPEDEF:
+ m2_typedef (type, stream, show, level, flags);
+ break;
+
+ case TYPE_CODE_ARRAY:
+ m2_array (type, stream, show, level, flags);
+ break;
+
+ case TYPE_CODE_PTR:
+ m2_pointer (type, stream, show, level, flags);
+ break;
+
+ case TYPE_CODE_REF:
+ m2_ref (type, stream, show, level, flags);
+ break;
+
+ case TYPE_CODE_METHOD:
+ m2_unknown (_("method"), type, stream, show, level);
+ break;
+
+ case TYPE_CODE_FUNC:
+ m2_procedure (type, stream, show, level, flags);
+ break;
+
+ case TYPE_CODE_UNION:
+ m2_union (type, stream);
+ break;
+
+ case TYPE_CODE_ENUM:
+ m2_enum (type, stream, show, level);
+ break;
+
+ case TYPE_CODE_VOID:
+ break;
+
+ case TYPE_CODE_UNDEF:
+ /* i18n: Do not translate the "struct" part! */
+ m2_unknown (_("undef"), type, stream, show, level);
+ break;
+
+ case TYPE_CODE_ERROR:
+ m2_unknown (_("error"), type, stream, show, level);
+ break;
+
+ case TYPE_CODE_RANGE:
+ m2_range (type, stream, show, level, flags);
+ break;
+
+ default:
+ m2_type_name (type, stream);
+ break;
+ }
+}
+
+/* Print a typedef using M2 syntax. TYPE is the underlying type.
+ NEW_SYMBOL is the symbol naming the type. STREAM is the stream on
+ which to print. */
+
+void
+m2_print_typedef (struct type *type, struct symbol *new_symbol,
+ struct ui_file *stream)
+{
+ type = check_typedef (type);
+ fprintf_filtered (stream, "TYPE ");
+ if (!SYMBOL_TYPE (new_symbol)->name ()
+ || strcmp ((SYMBOL_TYPE (new_symbol))->name (),
+ new_symbol->linkage_name ()) != 0)
+ fprintf_filtered (stream, "%s = ", new_symbol->print_name ());
+ else
+ fprintf_filtered (stream, "<builtin> = ");
+ type_print (type, "", stream, 0);
+ fprintf_filtered (stream, ";");
+}
+
+/* m2_type_name - if a, type, has a name then print it. */
+
+void
+m2_type_name (struct type *type, struct ui_file *stream)
+{
+ if (type->name () != NULL)
+ fputs_filtered (type->name (), stream);
+}
+
+/* m2_range - displays a Modula-2 subrange type. */
+
+void
+m2_range (struct type *type, struct ui_file *stream, int show,
+ int level, const struct type_print_options *flags)
+{
+ if (TYPE_HIGH_BOUND (type) == TYPE_LOW_BOUND (type))
+ {
+ /* FIXME: TYPE_TARGET_TYPE used to be TYPE_DOMAIN_TYPE but that was
+ wrong. Not sure if TYPE_TARGET_TYPE is correct though. */
+ m2_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level,
+ flags);
+ }
+ else
+ {
+ struct type *target = TYPE_TARGET_TYPE (type);
+
+ fprintf_filtered (stream, "[");
+ print_type_scalar (target, TYPE_LOW_BOUND (type), stream);
+ fprintf_filtered (stream, "..");
+ print_type_scalar (target, TYPE_HIGH_BOUND (type), stream);
+ fprintf_filtered (stream, "]");
+ }
+}
+
+static void
+m2_typedef (struct type *type, struct ui_file *stream, int show,
+ int level, const struct type_print_options *flags)
+{
+ if (type->name () != NULL)
+ {
+ fputs_filtered (type->name (), stream);
+ fputs_filtered (" = ", stream);
+ }
+ m2_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level, flags);
+}
+
+/* m2_array - prints out a Modula-2 ARRAY ... OF type. */
+
+static void m2_array (struct type *type, struct ui_file *stream,
+ int show, int level, const struct type_print_options *flags)
+{
+ fprintf_filtered (stream, "ARRAY [");
+ if (TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0
+ && !TYPE_ARRAY_UPPER_BOUND_IS_UNDEFINED (type))
+ {
+ if (TYPE_INDEX_TYPE (type) != 0)
+ {
+ m2_print_bounds (TYPE_INDEX_TYPE (type), stream, show, -1, 0);
+ fprintf_filtered (stream, "..");
+ m2_print_bounds (TYPE_INDEX_TYPE (type), stream, show, -1, 1);
+ }
+ else
+ fputs_filtered (pulongest ((TYPE_LENGTH (type)
+ / TYPE_LENGTH (TYPE_TARGET_TYPE (type)))),
+ stream);
+ }
+ fprintf_filtered (stream, "] OF ");
+ m2_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level, flags);
+}
+
+static void
+m2_pointer (struct type *type, struct ui_file *stream, int show,
+ int level, const struct type_print_options *flags)
+{
+ if (TYPE_CONST (type))
+ fprintf_filtered (stream, "[...] : ");
+ else
+ fprintf_filtered (stream, "POINTER TO ");
+
+ m2_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level, flags);
+}
+
+static void
+m2_ref (struct type *type, struct ui_file *stream, int show,
+ int level, const struct type_print_options *flags)
+{
+ fprintf_filtered (stream, "VAR");
+ m2_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level, flags);
+}
-#include "gdb_string.h"
-#include <errno.h>
+static void
+m2_unknown (const char *s, struct type *type, struct ui_file *stream,
+ int show, int level)
+{
+ fprintf_filtered (stream, "%s %s", s, _("is unknown"));
+}
+
+static void m2_union (struct type *type, struct ui_file *stream)
+{
+ fprintf_filtered (stream, "union");
+}
+
+static void
+m2_procedure (struct type *type, struct ui_file *stream,
+ int show, int level, const struct type_print_options *flags)
+{
+ fprintf_filtered (stream, "PROCEDURE ");
+ m2_type_name (type, stream);
+ if (TYPE_TARGET_TYPE (type) == NULL
+ || TYPE_TARGET_TYPE (type)->code () != TYPE_CODE_VOID)
+ {
+ int i, len = type->num_fields ();
+
+ fprintf_filtered (stream, " (");
+ for (i = 0; i < len; i++)
+ {
+ if (i > 0)
+ {
+ fputs_filtered (", ", stream);
+ wrap_here (" ");
+ }
+ m2_print_type (TYPE_FIELD_TYPE (type, i), "", stream, -1, 0, flags);
+ }
+ fprintf_filtered (stream, ") : ");
+ if (TYPE_TARGET_TYPE (type) != NULL)
+ m2_print_type (TYPE_TARGET_TYPE (type), "", stream, 0, 0, flags);
+ else
+ type_print_unknown_return_type (stream);
+ }
+}
+
+static void
+m2_print_bounds (struct type *type,
+ struct ui_file *stream, int show, int level,
+ int print_high)
+{
+ struct type *target = TYPE_TARGET_TYPE (type);
+
+ if (type->num_fields () == 0)
+ return;
+
+ if (print_high)
+ print_type_scalar (target, TYPE_HIGH_BOUND (type), stream);
+ else
+ print_type_scalar (target, TYPE_LOW_BOUND (type), stream);
+}
+
+static void
+m2_short_set (struct type *type, struct ui_file *stream, int show, int level)
+{
+ fprintf_filtered(stream, "SET [");
+ m2_print_bounds (TYPE_INDEX_TYPE (type), stream,
+ show - 1, level, 0);
+
+ fprintf_filtered(stream, "..");
+ m2_print_bounds (TYPE_INDEX_TYPE (type), stream,
+ show - 1, level, 1);
+ fprintf_filtered(stream, "]");
+}
+
+int
+m2_is_long_set (struct type *type)
+{
+ LONGEST previous_high = 0; /* Unnecessary initialization
+ keeps gcc -Wall happy. */
+ int len, i;
+ struct type *range;
+
+ if (type->code () == TYPE_CODE_STRUCT)
+ {
+
+ /* check if all fields of the RECORD are consecutive sets. */
+
+ len = type->num_fields ();
+ for (i = TYPE_N_BASECLASSES (type); i < len; i++)
+ {
+ if (TYPE_FIELD_TYPE (type, i) == NULL)
+ return 0;
+ if (TYPE_FIELD_TYPE (type, i)->code () != TYPE_CODE_SET)
+ return 0;
+ if (TYPE_FIELD_NAME (type, i) != NULL
+ && (strcmp (TYPE_FIELD_NAME (type, i), "") != 0))
+ return 0;
+ range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i));
+ if ((i > TYPE_N_BASECLASSES (type))
+ && previous_high + 1 != TYPE_LOW_BOUND (range))
+ return 0;
+ previous_high = TYPE_HIGH_BOUND (range);
+ }
+ return len>0;
+ }
+ return 0;
+}
+
+/* m2_get_discrete_bounds - a wrapper for get_discrete_bounds which
+ understands that CHARs might be signed.
+ This should be integrated into gdbtypes.c
+ inside get_discrete_bounds. */
+
+static int
+m2_get_discrete_bounds (struct type *type, LONGEST *lowp, LONGEST *highp)
+{
+ type = check_typedef (type);
+ switch (type->code ())
+ {
+ case TYPE_CODE_CHAR:
+ if (TYPE_LENGTH (type) < sizeof (LONGEST))
+ {
+ if (!TYPE_UNSIGNED (type))
+ {
+ *lowp = -(1 << (TYPE_LENGTH (type) * TARGET_CHAR_BIT - 1));
+ *highp = -*lowp - 1;
+ return 0;
+ }
+ }
+ /* fall through */
+ default:
+ return get_discrete_bounds (type, lowp, highp);
+ }
+}
+
+/* m2_is_long_set_of_type - returns TRUE if the long set was declared as
+ SET OF <oftype> of_type is assigned to the
+ subtype. */
+
+int
+m2_is_long_set_of_type (struct type *type, struct type **of_type)
+{
+ int len, i;
+ struct type *range;
+ struct type *target;
+ LONGEST l1, l2;
+ LONGEST h1, h2;
+
+ if (type->code () == TYPE_CODE_STRUCT)
+ {
+ len = type->num_fields ();
+ i = TYPE_N_BASECLASSES (type);
+ if (len == 0)
+ return 0;
+ range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i));
+ target = TYPE_TARGET_TYPE (range);
+
+ l1 = TYPE_LOW_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)));
+ h1 = TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, len-1)));
+ *of_type = target;
+ if (m2_get_discrete_bounds (target, &l2, &h2) >= 0)
+ return (l1 == l2 && h1 == h2);
+ error (_("long_set failed to find discrete bounds for its subtype"));
+ return 0;
+ }
+ error (_("expecting long_set"));
+ return 0;
+}
+
+static int
+m2_long_set (struct type *type, struct ui_file *stream, int show, int level,
+ const struct type_print_options *flags)
+{
+ struct type *of_type;
+ int i;
+ int len = type->num_fields ();
+ LONGEST low;
+ LONGEST high;
+
+ if (m2_is_long_set (type))
+ {
+ if (type->name () != NULL)
+ {
+ fputs_filtered (type->name (), stream);
+ if (show == 0)
+ return 1;
+ fputs_filtered (" = ", stream);
+ }
+
+ if (get_long_set_bounds (type, &low, &high))
+ {
+ fprintf_filtered(stream, "SET OF ");
+ i = TYPE_N_BASECLASSES (type);
+ if (m2_is_long_set_of_type (type, &of_type))
+ m2_print_type (of_type, "", stream, show - 1, level, flags);
+ else
+ {
+ fprintf_filtered(stream, "[");
+ m2_print_bounds (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)),
+ stream, show - 1, level, 0);
+
+ fprintf_filtered(stream, "..");
+
+ m2_print_bounds (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, len-1)),
+ stream, show - 1, level, 1);
+ fprintf_filtered(stream, "]");
+ }
+ }
+ else
+ /* i18n: Do not translate the "SET OF" part! */
+ fprintf_filtered(stream, _("SET OF <unknown>"));
+
+ return 1;
+ }
+ return 0;
+}
+
+/* m2_is_unbounded_array - returns TRUE if, type, should be regarded
+ as a Modula-2 unbounded ARRAY type. */
+
+int
+m2_is_unbounded_array (struct type *type)
+{
+ if (type->code () == TYPE_CODE_STRUCT)
+ {
+ /*
+ * check if we have a structure with exactly two fields named
+ * _m2_contents and _m2_high. It also checks to see if the
+ * type of _m2_contents is a pointer. The TYPE_TARGET_TYPE
+ * of the pointer determines the unbounded ARRAY OF type.
+ */
+ if (type->num_fields () != 2)
+ return 0;
+ if (strcmp (TYPE_FIELD_NAME (type, 0), "_m2_contents") != 0)
+ return 0;
+ if (strcmp (TYPE_FIELD_NAME (type, 1), "_m2_high") != 0)
+ return 0;
+ if (TYPE_FIELD_TYPE (type, 0)->code () != TYPE_CODE_PTR)
+ return 0;
+ return 1;
+ }
+ return 0;
+}
+
+/* m2_unbounded_array - if the struct type matches a Modula-2 unbounded
+ parameter type then display the type as an
+ ARRAY OF type. Returns TRUE if an unbounded
+ array type was detected. */
+
+static int
+m2_unbounded_array (struct type *type, struct ui_file *stream, int show,
+ int level, const struct type_print_options *flags)
+{
+ if (m2_is_unbounded_array (type))
+ {
+ if (show > 0)
+ {
+ fputs_filtered ("ARRAY OF ", stream);
+ m2_print_type (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0)),
+ "", stream, 0, level, flags);
+ }
+ return 1;
+ }
+ return 0;
+}
+
+void
+m2_record_fields (struct type *type, struct ui_file *stream, int show,
+ int level, const struct type_print_options *flags)
+{
+ /* Print the tag if it exists. */
+ if (type->name () != NULL)
+ {
+ if (!startswith (type->name (), "$$"))
+ {
+ fputs_filtered (type->name (), stream);
+ if (show > 0)
+ fprintf_filtered (stream, " = ");
+ }
+ }
+ wrap_here (" ");
+ if (show < 0)
+ {
+ if (type->code () == TYPE_CODE_STRUCT)
+ fprintf_filtered (stream, "RECORD ... END ");
+ else if (type->code () == TYPE_CODE_UNION)
+ fprintf_filtered (stream, "CASE ... END ");
+ }
+ else if (show > 0)
+ {
+ int i;
+ int len = type->num_fields ();
+
+ if (type->code () == TYPE_CODE_STRUCT)
+ fprintf_filtered (stream, "RECORD\n");
+ else if (type->code () == TYPE_CODE_UNION)
+ /* i18n: Do not translate "CASE" and "OF". */
+ fprintf_filtered (stream, _("CASE <variant> OF\n"));
+
+ for (i = TYPE_N_BASECLASSES (type); i < len; i++)
+ {
+ QUIT;
+
+ print_spaces_filtered (level + 4, stream);
+ fputs_styled (TYPE_FIELD_NAME (type, i),
+ variable_name_style.style (), stream);
+ fputs_filtered (" : ", stream);
+ m2_print_type (TYPE_FIELD_TYPE (type, i),
+ "",
+ stream, 0, level + 4, flags);
+ if (TYPE_FIELD_PACKED (type, i))
+ {
+ /* It is a bitfield. This code does not attempt
+ to look at the bitpos and reconstruct filler,
+ unnamed fields. This would lead to misleading
+ results if the compiler does not put out fields
+ for such things (I don't know what it does). */
+ fprintf_filtered (stream, " : %d",
+ TYPE_FIELD_BITSIZE (type, i));
+ }
+ fprintf_filtered (stream, ";\n");
+ }
+
+ fprintfi_filtered (level, stream, "END ");
+ }
+}
void
-m2_print_type (type, varstring, stream, show, level)
- struct type *type;
- char *varstring;
- GDB_FILE *stream;
- int show;
- int level;
+m2_enum (struct type *type, struct ui_file *stream, int show, int level)
{
- extern void c_print_type PARAMS ((struct type *, char *, GDB_FILE *, int, int));
+ LONGEST lastval;
+ int i, len;
- c_print_type (type, varstring, stream, show, level); /* FIXME */
+ if (show < 0)
+ {
+ /* If we just printed a tag name, no need to print anything else. */
+ if (type->name () == NULL)
+ fprintf_filtered (stream, "(...)");
+ }
+ else if (show > 0 || type->name () == NULL)
+ {
+ fprintf_filtered (stream, "(");
+ len = type->num_fields ();
+ lastval = 0;
+ for (i = 0; i < len; i++)
+ {
+ QUIT;
+ if (i > 0)
+ fprintf_filtered (stream, ", ");
+ wrap_here (" ");
+ fputs_styled (TYPE_FIELD_NAME (type, i),
+ variable_name_style.style (), stream);
+ if (lastval != TYPE_FIELD_ENUMVAL (type, i))
+ {
+ fprintf_filtered (stream, " = %s",
+ plongest (TYPE_FIELD_ENUMVAL (type, i)));
+ lastval = TYPE_FIELD_ENUMVAL (type, i);
+ }
+ lastval++;
+ }
+ fprintf_filtered (stream, ")");
+ }
}
projects / deliverable / binutils-gdb.git / blobdiff