/* Support for printing Modula 2 values for GDB, the GNU debugger.
- Copyright 1986, 1988, 1989, 1991 Free Software Foundation, Inc.
-This file is part of GDB.
+ Copyright (C) 1986-2020 Free Software Foundation, Inc.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This file is part of GDB.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ 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 3 of the License, or
+ (at your option) any later version.
-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. */
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "obstack.h"
#include "symtab.h"
#include "gdbtypes.h"
+#include "expression.h"
+#include "value.h"
#include "valprint.h"
+#include "language.h"
+#include "typeprint.h"
+#include "c-lang.h"
#include "m2-lang.h"
+#include "target.h"
+#include "cli/cli-style.h"
+
+static int print_unpacked_pointer (struct type *type,
+ CORE_ADDR address, CORE_ADDR addr,
+ const struct value_print_options *options,
+ struct ui_file *stream);
+static void
+m2_print_array_contents (struct value *val,
+ struct ui_file *stream, int recurse,
+ const struct value_print_options *options,
+ int len);
-/* FIXME: For now, just explicitly declare c_val_print and use it instead */
+
+/* get_long_set_bounds - assigns the bounds of the long set to low and
+ high. */
int
-m2_val_print (type, valaddr, address, stream, format, deref_ref, recurse,
- pretty)
- struct type *type;
- char *valaddr;
- CORE_ADDR address;
- GDB_FILE *stream;
- int format;
- int deref_ref;
- int recurse;
- enum val_prettyprint pretty;
-{
- extern int
- c_val_print PARAMS ((struct type *, char *, CORE_ADDR, GDB_FILE *, int, int,
- int, enum val_prettyprint));
- return (c_val_print (type, valaddr, address, stream, format, deref_ref,
- recurse, pretty));
+get_long_set_bounds (struct type *type, LONGEST *low, LONGEST *high)
+{
+ int len, i;
+
+ if (type->code () == TYPE_CODE_STRUCT)
+ {
+ len = type->num_fields ();
+ i = TYPE_N_BASECLASSES (type);
+ if (len == 0)
+ return 0;
+ *low = TYPE_LOW_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)));
+ *high = TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type,
+ len-1)));
+ return 1;
+ }
+ error (_("expecting long_set"));
+ return 0;
+}
+
+static void
+m2_print_long_set (struct type *type, const gdb_byte *valaddr,
+ int embedded_offset, CORE_ADDR address,
+ struct ui_file *stream)
+{
+ int empty_set = 1;
+ int element_seen = 0;
+ LONGEST previous_low = 0;
+ LONGEST previous_high= 0;
+ LONGEST i, low_bound, high_bound;
+ LONGEST field_low, field_high;
+ struct type *range;
+ int len, field;
+ struct type *target;
+ int bitval;
+
+ type = check_typedef (type);
+
+ fprintf_filtered (stream, "{");
+ len = type->num_fields ();
+ if (get_long_set_bounds (type, &low_bound, &high_bound))
+ {
+ field = TYPE_N_BASECLASSES (type);
+ range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
+ }
+ else
+ {
+ fprintf_styled (stream, metadata_style.style (),
+ " %s }", _("<unknown bounds of set>"));
+ return;
+ }
+
+ target = TYPE_TARGET_TYPE (range);
+
+ if (get_discrete_bounds (range, &field_low, &field_high) >= 0)
+ {
+ for (i = low_bound; i <= high_bound; i++)
+ {
+ bitval = value_bit_index (TYPE_FIELD_TYPE (type, field),
+ (TYPE_FIELD_BITPOS (type, field) / 8) +
+ valaddr + embedded_offset, i);
+ if (bitval < 0)
+ error (_("bit test is out of range"));
+ else if (bitval > 0)
+ {
+ previous_high = i;
+ if (! element_seen)
+ {
+ if (! empty_set)
+ fprintf_filtered (stream, ", ");
+ print_type_scalar (target, i, stream);
+ empty_set = 0;
+ element_seen = 1;
+ previous_low = i;
+ }
+ }
+ else
+ {
+ /* bit is not set */
+ if (element_seen)
+ {
+ if (previous_low+1 < previous_high)
+ fprintf_filtered (stream, "..");
+ if (previous_low+1 < previous_high)
+ print_type_scalar (target, previous_high, stream);
+ element_seen = 0;
+ }
+ }
+ if (i == field_high)
+ {
+ field++;
+ if (field == len)
+ break;
+ range = TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
+ if (get_discrete_bounds (range, &field_low, &field_high) < 0)
+ break;
+ target = TYPE_TARGET_TYPE (range);
+ }
+ }
+ if (element_seen)
+ {
+ if (previous_low+1 < previous_high)
+ {
+ fprintf_filtered (stream, "..");
+ print_type_scalar (target, previous_high, stream);
+ }
+ element_seen = 0;
+ }
+ fprintf_filtered (stream, "}");
+ }
+}
+
+static void
+m2_print_unbounded_array (struct value *value,
+ struct ui_file *stream, int recurse,
+ const struct value_print_options *options)
+{
+ CORE_ADDR addr;
+ LONGEST len;
+ struct value *val;
+
+ struct type *type = check_typedef (value_type (value));
+ const gdb_byte *valaddr = value_contents_for_printing (value);
+
+ addr = unpack_pointer (TYPE_FIELD_TYPE (type, 0),
+ (TYPE_FIELD_BITPOS (type, 0) / 8) +
+ valaddr);
+
+ val = value_at_lazy (TYPE_TARGET_TYPE (TYPE_FIELD_TYPE (type, 0)),
+ addr);
+ len = unpack_field_as_long (type, valaddr, 1);
+
+ fprintf_filtered (stream, "{");
+ m2_print_array_contents (val, stream, recurse, options, len);
+ fprintf_filtered (stream, ", HIGH = %d}", (int) len);
+}
+
+static int
+print_unpacked_pointer (struct type *type,
+ CORE_ADDR address, CORE_ADDR addr,
+ const struct value_print_options *options,
+ struct ui_file *stream)
+{
+ struct gdbarch *gdbarch = get_type_arch (type);
+ struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
+ int want_space = 0;
+
+ if (elttype->code () == TYPE_CODE_FUNC)
+ {
+ /* Try to print what function it points to. */
+ print_function_pointer_address (options, gdbarch, addr, stream);
+ /* Return value is irrelevant except for string pointers. */
+ return 0;
+ }
+
+ if (options->addressprint && options->format != 's')
+ {
+ fputs_filtered (paddress (gdbarch, address), stream);
+ want_space = 1;
+ }
+
+ /* For a pointer to char or unsigned char, also print the string
+ pointed to, unless pointer is null. */
+
+ if (TYPE_LENGTH (elttype) == 1
+ && elttype->code () == TYPE_CODE_INT
+ && (options->format == 0 || options->format == 's')
+ && addr != 0)
+ {
+ if (want_space)
+ fputs_filtered (" ", stream);
+ return val_print_string (TYPE_TARGET_TYPE (type), NULL, addr, -1,
+ stream, options);
+ }
+
+ return 0;
+}
+
+static void
+print_variable_at_address (struct type *type,
+ const gdb_byte *valaddr,
+ struct ui_file *stream,
+ int recurse,
+ const struct value_print_options *options)
+{
+ struct gdbarch *gdbarch = get_type_arch (type);
+ CORE_ADDR addr = unpack_pointer (type, valaddr);
+ struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
+
+ fprintf_filtered (stream, "[");
+ fputs_filtered (paddress (gdbarch, addr), stream);
+ fprintf_filtered (stream, "] : ");
+
+ if (elttype->code () != TYPE_CODE_UNDEF)
+ {
+ struct value *deref_val =
+ value_at (TYPE_TARGET_TYPE (type), unpack_pointer (type, valaddr));
+
+ common_val_print (deref_val, stream, recurse, options, current_language);
+ }
+ else
+ fputs_filtered ("???", stream);
+}
+
+
+/* m2_print_array_contents - prints out the contents of an
+ array up to a max_print values.
+ It prints arrays of char as a string
+ and all other data types as comma
+ separated values. */
+
+static void
+m2_print_array_contents (struct value *val,
+ struct ui_file *stream, int recurse,
+ const struct value_print_options *options,
+ int len)
+{
+ struct type *type = check_typedef (value_type (val));
+
+ if (TYPE_LENGTH (type) > 0)
+ {
+ /* For an array of chars, print with string syntax. */
+ if (TYPE_LENGTH (type) == 1 &&
+ ((type->code () == TYPE_CODE_INT)
+ || ((current_language->la_language == language_m2)
+ && (type->code () == TYPE_CODE_CHAR)))
+ && (options->format == 0 || options->format == 's'))
+ val_print_string (type, NULL, value_address (val), len+1, stream,
+ options);
+ else
+ {
+ fprintf_filtered (stream, "{");
+ value_print_array_elements (val, stream, recurse, options, 0);
+ fprintf_filtered (stream, "}");
+ }
+ }
+}
+
+/* Decorations for Modula 2. */
+
+static const struct generic_val_print_decorations m2_decorations =
+{
+ "",
+ " + ",
+ " * I",
+ "TRUE",
+ "FALSE",
+ "void",
+ "{",
+ "}"
+};
+
+/* See m2-lang.h. */
+
+void
+m2_value_print_inner (struct value *val, struct ui_file *stream, int recurse,
+ const struct value_print_options *options)
+{
+ unsigned len;
+ struct type *elttype;
+ CORE_ADDR addr;
+ const gdb_byte *valaddr = value_contents_for_printing (val);
+ const CORE_ADDR address = value_address (val);
+
+ struct type *type = check_typedef (value_type (val));
+ switch (type->code ())
+ {
+ case TYPE_CODE_ARRAY:
+ if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
+ {
+ elttype = check_typedef (TYPE_TARGET_TYPE (type));
+ len = TYPE_LENGTH (type) / TYPE_LENGTH (elttype);
+ /* For an array of chars, print with string syntax. */
+ if (TYPE_LENGTH (elttype) == 1 &&
+ ((elttype->code () == TYPE_CODE_INT)
+ || ((current_language->la_language == language_m2)
+ && (elttype->code () == TYPE_CODE_CHAR)))
+ && (options->format == 0 || options->format == 's'))
+ {
+ /* If requested, look for the first null char and only print
+ elements up to it. */
+ if (options->stop_print_at_null)
+ {
+ unsigned int temp_len;
+
+ /* Look for a NULL char. */
+ for (temp_len = 0;
+ (valaddr[temp_len]
+ && temp_len < len && temp_len < options->print_max);
+ temp_len++);
+ len = temp_len;
+ }
+
+ LA_PRINT_STRING (stream, TYPE_TARGET_TYPE (type),
+ valaddr, len, NULL, 0, options);
+ }
+ else
+ {
+ fprintf_filtered (stream, "{");
+ value_print_array_elements (val, stream, recurse,
+ options, 0);
+ fprintf_filtered (stream, "}");
+ }
+ break;
+ }
+ /* Array of unspecified length: treat like pointer to first elt. */
+ print_unpacked_pointer (type, address, address, options, stream);
+ break;
+
+ case TYPE_CODE_PTR:
+ if (TYPE_CONST (type))
+ print_variable_at_address (type, valaddr, stream, recurse, options);
+ else if (options->format && options->format != 's')
+ value_print_scalar_formatted (val, options, 0, stream);
+ else
+ {
+ addr = unpack_pointer (type, valaddr);
+ print_unpacked_pointer (type, addr, address, options, stream);
+ }
+ break;
+
+ case TYPE_CODE_UNION:
+ if (recurse && !options->unionprint)
+ {
+ fprintf_filtered (stream, "{...}");
+ break;
+ }
+ /* Fall through. */
+ case TYPE_CODE_STRUCT:
+ if (m2_is_long_set (type))
+ m2_print_long_set (type, valaddr, 0, address, stream);
+ else if (m2_is_unbounded_array (type))
+ m2_print_unbounded_array (val, stream, recurse, options);
+ else
+ cp_print_value_fields (val, stream, recurse, options, NULL, 0);
+ break;
+
+ case TYPE_CODE_SET:
+ elttype = TYPE_INDEX_TYPE (type);
+ elttype = check_typedef (elttype);
+ if (TYPE_STUB (elttype))
+ {
+ fprintf_styled (stream, metadata_style.style (),
+ _("<incomplete type>"));
+ break;
+ }
+ else
+ {
+ struct type *range = elttype;
+ LONGEST low_bound, high_bound;
+ int i;
+ int need_comma = 0;
+
+ fputs_filtered ("{", stream);
+
+ i = get_discrete_bounds (range, &low_bound, &high_bound);
+ maybe_bad_bstring:
+ if (i < 0)
+ {
+ fputs_styled (_("<error value>"), metadata_style.style (),
+ stream);
+ goto done;
+ }
+
+ for (i = low_bound; i <= high_bound; i++)
+ {
+ int element = value_bit_index (type, valaddr, i);
+
+ if (element < 0)
+ {
+ i = element;
+ goto maybe_bad_bstring;
+ }
+ if (element)
+ {
+ if (need_comma)
+ fputs_filtered (", ", stream);
+ print_type_scalar (range, i, stream);
+ need_comma = 1;
+
+ if (i + 1 <= high_bound
+ && value_bit_index (type, valaddr, ++i))
+ {
+ int j = i;
+
+ fputs_filtered ("..", stream);
+ while (i + 1 <= high_bound
+ && value_bit_index (type, valaddr, ++i))
+ j = i;
+ print_type_scalar (range, j, stream);
+ }
+ }
+ }
+ done:
+ fputs_filtered ("}", stream);
+ }
+ break;
+
+ case TYPE_CODE_RANGE:
+ if (TYPE_LENGTH (type) == TYPE_LENGTH (TYPE_TARGET_TYPE (type)))
+ {
+ struct value *v = value_cast (TYPE_TARGET_TYPE (type), val);
+ m2_value_print_inner (v, stream, recurse, options);
+ break;
+ }
+ /* FIXME: create_static_range_type does not set the unsigned bit in a
+ range type (I think it probably should copy it from the target
+ type), so we won't print values which are too large to
+ fit in a signed integer correctly. */
+ /* FIXME: Doesn't handle ranges of enums correctly. (Can't just
+ print with the target type, though, because the size of our type
+ and the target type might differ). */
+ /* FALLTHROUGH */
+
+ case TYPE_CODE_REF:
+ case TYPE_CODE_ENUM:
+ case TYPE_CODE_FUNC:
+ case TYPE_CODE_INT:
+ case TYPE_CODE_FLT:
+ case TYPE_CODE_METHOD:
+ case TYPE_CODE_VOID:
+ case TYPE_CODE_ERROR:
+ case TYPE_CODE_UNDEF:
+ case TYPE_CODE_BOOL:
+ case TYPE_CODE_CHAR:
+ default:
+ generic_value_print (val, stream, recurse, options, &m2_decorations);
+ break;
+ }
}
projects / deliverable / binutils-gdb.git / blobdiff