/* Support for printing Modula 2 values for GDB, the GNU debugger.
- Copyright 1986, 1988, 1989, 1991, 2000 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 "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, embedded_offset, address,
- stream, format, deref_ref, recurse, pretty)
- struct type *type;
- char *valaddr;
- int embedded_offset;
- CORE_ADDR address;
- struct ui_file *stream;
- int format;
- int deref_ref;
- int recurse;
- enum val_prettyprint pretty;
-{
- extern int c_val_print (struct type *, char *, int, CORE_ADDR,
- struct ui_file *, int, int, int,
- enum val_prettyprint);
- return (c_val_print (type, valaddr, 0, 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