1184 lines
33 KiB
C
1184 lines
33 KiB
C
/* Support for printing Ada values for GDB, the GNU debugger.
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Copyright (C) 1986-2020 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 3 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, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include <ctype.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 "valprint.h"
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#include "language.h"
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#include "annotate.h"
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#include "ada-lang.h"
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#include "target-float.h"
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#include "cli/cli-style.h"
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#include "gdbarch.h"
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static int print_field_values (struct value *, struct value *,
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struct ui_file *, int,
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const struct value_print_options *,
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int, const struct language_defn *);
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/* Make TYPE unsigned if its range of values includes no negatives. */
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static void
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adjust_type_signedness (struct type *type)
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{
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if (type != NULL && TYPE_CODE (type) == TYPE_CODE_RANGE
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&& TYPE_LOW_BOUND (type) >= 0)
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TYPE_UNSIGNED (type) = 1;
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}
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/* Assuming TYPE is a simple array type, prints its lower bound on STREAM,
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if non-standard (i.e., other than 1 for numbers, other than lower bound
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of index type for enumerated type). Returns 1 if something printed,
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otherwise 0. */
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static int
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print_optional_low_bound (struct ui_file *stream, struct type *type,
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const struct value_print_options *options)
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{
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struct type *index_type;
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LONGEST low_bound;
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LONGEST high_bound;
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if (options->print_array_indexes)
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return 0;
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if (!get_array_bounds (type, &low_bound, &high_bound))
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return 0;
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/* If this is an empty array, then don't print the lower bound.
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That would be confusing, because we would print the lower bound,
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followed by... nothing! */
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if (low_bound > high_bound)
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return 0;
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index_type = TYPE_INDEX_TYPE (type);
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while (TYPE_CODE (index_type) == TYPE_CODE_RANGE)
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{
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/* We need to know what the base type is, in order to do the
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appropriate check below. Otherwise, if this is a subrange
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of an enumerated type, where the underlying value of the
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first element is typically 0, we might test the low bound
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against the wrong value. */
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index_type = TYPE_TARGET_TYPE (index_type);
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}
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/* Don't print the lower bound if it's the default one. */
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switch (TYPE_CODE (index_type))
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{
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case TYPE_CODE_BOOL:
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case TYPE_CODE_CHAR:
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if (low_bound == 0)
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return 0;
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break;
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case TYPE_CODE_ENUM:
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if (low_bound == TYPE_FIELD_ENUMVAL (index_type, 0))
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return 0;
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break;
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case TYPE_CODE_UNDEF:
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index_type = NULL;
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/* FALL THROUGH */
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default:
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if (low_bound == 1)
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return 0;
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break;
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}
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ada_print_scalar (index_type, low_bound, stream);
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fprintf_filtered (stream, " => ");
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return 1;
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}
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/* Version of val_print_array_elements for GNAT-style packed arrays.
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Prints elements of packed array of type TYPE from VALADDR on
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STREAM. Formats according to OPTIONS and separates with commas.
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RECURSE is the recursion (nesting) level. TYPE must have been
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decoded (as by ada_coerce_to_simple_array). */
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static void
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val_print_packed_array_elements (struct type *type, const gdb_byte *valaddr,
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int offset, struct ui_file *stream,
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int recurse,
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const struct value_print_options *options)
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{
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unsigned int i;
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unsigned int things_printed = 0;
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unsigned len;
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struct type *elttype, *index_type;
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unsigned long bitsize = TYPE_FIELD_BITSIZE (type, 0);
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struct value *mark = value_mark ();
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LONGEST low = 0;
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elttype = TYPE_TARGET_TYPE (type);
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index_type = TYPE_INDEX_TYPE (type);
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{
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LONGEST high;
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struct type *base_index_type;
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if (get_discrete_bounds (index_type, &low, &high) < 0)
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len = 1;
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else
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len = high - low + 1;
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if (TYPE_CODE (index_type) == TYPE_CODE_RANGE)
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base_index_type = TYPE_TARGET_TYPE (index_type);
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else
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base_index_type = index_type;
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if (TYPE_CODE (base_index_type) == TYPE_CODE_ENUM)
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{
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LONGEST low_pos, high_pos;
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/* Non-contiguous enumerations types can by used as index types
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so the array length is computed from the positions of the
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first and last literal in the enumeration type, and not from
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the values of these literals. */
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if (!discrete_position (base_index_type, low, &low_pos)
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|| !discrete_position (base_index_type, high, &high_pos))
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{
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warning (_("unable to get positions in array, use bounds instead"));
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low_pos = low;
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high_pos = high;
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}
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/* The array length should normally be HIGH_POS - LOW_POS + 1.
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But in Ada we allow LOW_POS to be greater than HIGH_POS for
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empty arrays. In that situation, the array length is just zero,
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not negative! */
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if (low_pos > high_pos)
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len = 0;
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else
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len = high_pos - low_pos + 1;
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}
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}
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i = 0;
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annotate_array_section_begin (i, elttype);
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while (i < len && things_printed < options->print_max)
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{
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struct value *v0, *v1;
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int i0;
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if (i != 0)
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{
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if (options->prettyformat_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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else if (options->prettyformat_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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wrap_here (n_spaces (2 + 2 * recurse));
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maybe_print_array_index (index_type, i + low, stream, options);
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i0 = i;
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v0 = ada_value_primitive_packed_val (NULL, valaddr + offset,
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(i0 * bitsize) / HOST_CHAR_BIT,
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(i0 * bitsize) % HOST_CHAR_BIT,
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bitsize, elttype);
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while (1)
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{
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i += 1;
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if (i >= len)
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break;
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v1 = ada_value_primitive_packed_val (NULL, valaddr + offset,
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(i * bitsize) / HOST_CHAR_BIT,
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(i * bitsize) % HOST_CHAR_BIT,
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bitsize, elttype);
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if (TYPE_LENGTH (check_typedef (value_type (v0)))
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!= TYPE_LENGTH (check_typedef (value_type (v1))))
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break;
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if (!value_contents_eq (v0, value_embedded_offset (v0),
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v1, value_embedded_offset (v1),
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TYPE_LENGTH (check_typedef (value_type (v0)))))
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break;
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}
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if (i - i0 > options->repeat_count_threshold)
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{
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struct value_print_options opts = *options;
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opts.deref_ref = 0;
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common_val_print (v0, stream, recurse + 1, &opts, current_language);
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annotate_elt_rep (i - i0);
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fprintf_filtered (stream, _(" %p[<repeats %u times>%p]"),
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metadata_style.style ().ptr (), i - i0, nullptr);
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annotate_elt_rep_end ();
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}
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else
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{
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int j;
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struct value_print_options opts = *options;
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opts.deref_ref = 0;
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for (j = i0; j < i; j += 1)
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{
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if (j > i0)
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{
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if (options->prettyformat_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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wrap_here (n_spaces (2 + 2 * recurse));
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maybe_print_array_index (index_type, j + low,
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stream, options);
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}
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common_val_print (v0, stream, recurse + 1, &opts,
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current_language);
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annotate_elt ();
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}
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}
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things_printed += i - i0;
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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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value_free_to_mark (mark);
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}
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/* Print the character C on STREAM as part of the contents of a literal
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string whose delimiter is QUOTER. TYPE_LEN is the length in bytes
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of the character. */
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void
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ada_emit_char (int c, struct type *type, struct ui_file *stream,
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int quoter, int type_len)
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{
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/* If this character fits in the normal ASCII range, and is
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a printable character, then print the character as if it was
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an ASCII character, even if this is a wide character.
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The UCHAR_MAX check is necessary because the isascii function
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requires that its argument have a value of an unsigned char,
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or EOF (EOF is obviously not printable). */
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if (c <= UCHAR_MAX && isascii (c) && isprint (c))
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{
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if (c == quoter && c == '"')
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fprintf_filtered (stream, "\"\"");
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else
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fprintf_filtered (stream, "%c", c);
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}
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else
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fprintf_filtered (stream, "[\"%0*x\"]", type_len * 2, c);
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}
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/* Character #I of STRING, given that TYPE_LEN is the size in bytes
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of a character. */
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static int
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char_at (const gdb_byte *string, int i, int type_len,
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enum bfd_endian byte_order)
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{
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if (type_len == 1)
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return string[i];
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else
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return (int) extract_unsigned_integer (string + type_len * i,
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type_len, byte_order);
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}
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/* Print a floating-point value of type TYPE, pointed to in GDB by
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VALADDR, on STREAM. Use Ada formatting conventions: there must be
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a decimal point, and at least one digit before and after the
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point. We use the GNAT format for NaNs and infinities. */
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static void
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ada_print_floating (const gdb_byte *valaddr, struct type *type,
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struct ui_file *stream)
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{
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string_file tmp_stream;
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print_floating (valaddr, type, &tmp_stream);
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std::string &s = tmp_stream.string ();
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size_t skip_count = 0;
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/* Modify for Ada rules. */
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size_t pos = s.find ("inf");
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if (pos == std::string::npos)
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pos = s.find ("Inf");
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if (pos == std::string::npos)
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pos = s.find ("INF");
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if (pos != std::string::npos)
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s.replace (pos, 3, "Inf");
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if (pos == std::string::npos)
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{
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pos = s.find ("nan");
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if (pos == std::string::npos)
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pos = s.find ("NaN");
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if (pos == std::string::npos)
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pos = s.find ("Nan");
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if (pos != std::string::npos)
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{
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s[pos] = s[pos + 2] = 'N';
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if (s[0] == '-')
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skip_count = 1;
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}
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}
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if (pos == std::string::npos
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&& s.find ('.') == std::string::npos)
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{
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pos = s.find ('e');
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if (pos == std::string::npos)
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fprintf_filtered (stream, "%s.0", s.c_str ());
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else
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fprintf_filtered (stream, "%.*s.0%s", (int) pos, s.c_str (), &s[pos]);
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}
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else
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fprintf_filtered (stream, "%s", &s[skip_count]);
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}
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void
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ada_printchar (int c, struct type *type, struct ui_file *stream)
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{
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fputs_filtered ("'", stream);
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ada_emit_char (c, type, stream, '\'', TYPE_LENGTH (type));
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fputs_filtered ("'", stream);
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}
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/* [From print_type_scalar in typeprint.c]. Print VAL on STREAM in a
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form appropriate for TYPE, if non-NULL. If TYPE is NULL, print VAL
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like a default signed integer. */
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void
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ada_print_scalar (struct type *type, LONGEST val, struct ui_file *stream)
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{
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unsigned int i;
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unsigned len;
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if (!type)
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{
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print_longest (stream, 'd', 0, val);
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return;
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}
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type = ada_check_typedef (type);
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switch (TYPE_CODE (type))
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{
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case TYPE_CODE_ENUM:
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len = TYPE_NFIELDS (type);
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for (i = 0; i < len; i++)
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{
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if (TYPE_FIELD_ENUMVAL (type, i) == val)
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{
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break;
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}
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}
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if (i < len)
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{
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fputs_styled (ada_enum_name (TYPE_FIELD_NAME (type, i)),
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variable_name_style.style (), stream);
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}
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else
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{
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print_longest (stream, 'd', 0, val);
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}
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break;
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case TYPE_CODE_INT:
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print_longest (stream, TYPE_UNSIGNED (type) ? 'u' : 'd', 0, val);
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break;
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||
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||
case TYPE_CODE_CHAR:
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LA_PRINT_CHAR (val, type, stream);
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break;
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||
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case TYPE_CODE_BOOL:
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fprintf_filtered (stream, val ? "true" : "false");
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break;
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||
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case TYPE_CODE_RANGE:
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ada_print_scalar (TYPE_TARGET_TYPE (type), val, stream);
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return;
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||
|
||
case TYPE_CODE_UNDEF:
|
||
case TYPE_CODE_PTR:
|
||
case TYPE_CODE_ARRAY:
|
||
case TYPE_CODE_STRUCT:
|
||
case TYPE_CODE_UNION:
|
||
case TYPE_CODE_FUNC:
|
||
case TYPE_CODE_FLT:
|
||
case TYPE_CODE_VOID:
|
||
case TYPE_CODE_SET:
|
||
case TYPE_CODE_STRING:
|
||
case TYPE_CODE_ERROR:
|
||
case TYPE_CODE_MEMBERPTR:
|
||
case TYPE_CODE_METHODPTR:
|
||
case TYPE_CODE_METHOD:
|
||
case TYPE_CODE_REF:
|
||
warning (_("internal error: unhandled type in ada_print_scalar"));
|
||
break;
|
||
|
||
default:
|
||
error (_("Invalid type code in symbol table."));
|
||
}
|
||
}
|
||
|
||
/* Print the character string STRING, printing at most LENGTH characters.
|
||
Printing stops early if the number hits print_max; repeat counts
|
||
are printed as appropriate. Print ellipses at the end if we
|
||
had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.
|
||
TYPE_LEN is the length (1 or 2) of the character type. */
|
||
|
||
static void
|
||
printstr (struct ui_file *stream, struct type *elttype, const gdb_byte *string,
|
||
unsigned int length, int force_ellipses, int type_len,
|
||
const struct value_print_options *options)
|
||
{
|
||
enum bfd_endian byte_order = type_byte_order (elttype);
|
||
unsigned int i;
|
||
unsigned int things_printed = 0;
|
||
int in_quotes = 0;
|
||
int need_comma = 0;
|
||
|
||
if (length == 0)
|
||
{
|
||
fputs_filtered ("\"\"", stream);
|
||
return;
|
||
}
|
||
|
||
for (i = 0; i < length && things_printed < options->print_max; i += 1)
|
||
{
|
||
/* Position of the character we are examining
|
||
to see whether it is repeated. */
|
||
unsigned int rep1;
|
||
/* Number of repetitions we have detected so far. */
|
||
unsigned int reps;
|
||
|
||
QUIT;
|
||
|
||
if (need_comma)
|
||
{
|
||
fputs_filtered (", ", stream);
|
||
need_comma = 0;
|
||
}
|
||
|
||
rep1 = i + 1;
|
||
reps = 1;
|
||
while (rep1 < length
|
||
&& char_at (string, rep1, type_len, byte_order)
|
||
== char_at (string, i, type_len, byte_order))
|
||
{
|
||
rep1 += 1;
|
||
reps += 1;
|
||
}
|
||
|
||
if (reps > options->repeat_count_threshold)
|
||
{
|
||
if (in_quotes)
|
||
{
|
||
fputs_filtered ("\", ", stream);
|
||
in_quotes = 0;
|
||
}
|
||
fputs_filtered ("'", stream);
|
||
ada_emit_char (char_at (string, i, type_len, byte_order),
|
||
elttype, stream, '\'', type_len);
|
||
fputs_filtered ("'", stream);
|
||
fprintf_filtered (stream, _(" %p[<repeats %u times>%p]"),
|
||
metadata_style.style ().ptr (), reps, nullptr);
|
||
i = rep1 - 1;
|
||
things_printed += options->repeat_count_threshold;
|
||
need_comma = 1;
|
||
}
|
||
else
|
||
{
|
||
if (!in_quotes)
|
||
{
|
||
fputs_filtered ("\"", stream);
|
||
in_quotes = 1;
|
||
}
|
||
ada_emit_char (char_at (string, i, type_len, byte_order),
|
||
elttype, stream, '"', type_len);
|
||
things_printed += 1;
|
||
}
|
||
}
|
||
|
||
/* Terminate the quotes if necessary. */
|
||
if (in_quotes)
|
||
fputs_filtered ("\"", stream);
|
||
|
||
if (force_ellipses || i < length)
|
||
fputs_filtered ("...", stream);
|
||
}
|
||
|
||
void
|
||
ada_printstr (struct ui_file *stream, struct type *type,
|
||
const gdb_byte *string, unsigned int length,
|
||
const char *encoding, int force_ellipses,
|
||
const struct value_print_options *options)
|
||
{
|
||
printstr (stream, type, string, length, force_ellipses, TYPE_LENGTH (type),
|
||
options);
|
||
}
|
||
|
||
static int
|
||
print_variant_part (struct value *value, int field_num,
|
||
struct value *outer_value,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value_print_options *options,
|
||
int comma_needed,
|
||
const struct language_defn *language)
|
||
{
|
||
struct type *type = value_type (value);
|
||
struct type *var_type = TYPE_FIELD_TYPE (type, field_num);
|
||
int which = ada_which_variant_applies (var_type, outer_value);
|
||
|
||
if (which < 0)
|
||
return 0;
|
||
|
||
struct value *variant_field = value_field (value, field_num);
|
||
struct value *active_component = value_field (variant_field, which);
|
||
return print_field_values (active_component, outer_value, stream, recurse,
|
||
options, comma_needed, language);
|
||
}
|
||
|
||
/* Print out fields of VALUE.
|
||
|
||
STREAM, RECURSE, and OPTIONS have the same meanings as in
|
||
ada_print_value and ada_value_print.
|
||
|
||
OUTER_VALUE gives the enclosing record (used to get discriminant
|
||
values when printing variant parts).
|
||
|
||
COMMA_NEEDED is 1 if fields have been printed at the current recursion
|
||
level, so that a comma is needed before any field printed by this
|
||
call.
|
||
|
||
Returns 1 if COMMA_NEEDED or any fields were printed. */
|
||
|
||
static int
|
||
print_field_values (struct value *value, struct value *outer_value,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value_print_options *options,
|
||
int comma_needed,
|
||
const struct language_defn *language)
|
||
{
|
||
int i, len;
|
||
|
||
struct type *type = value_type (value);
|
||
len = TYPE_NFIELDS (type);
|
||
|
||
for (i = 0; i < len; i += 1)
|
||
{
|
||
if (ada_is_ignored_field (type, i))
|
||
continue;
|
||
|
||
if (ada_is_wrapper_field (type, i))
|
||
{
|
||
struct value *field_val = value_field (value, i);
|
||
comma_needed =
|
||
print_field_values (field_val, field_val,
|
||
stream, recurse, options,
|
||
comma_needed, language);
|
||
continue;
|
||
}
|
||
else if (ada_is_variant_part (type, i))
|
||
{
|
||
comma_needed =
|
||
print_variant_part (value, i, outer_value, stream, recurse,
|
||
options, comma_needed, language);
|
||
continue;
|
||
}
|
||
|
||
if (comma_needed)
|
||
fprintf_filtered (stream, ", ");
|
||
comma_needed = 1;
|
||
|
||
if (options->prettyformat)
|
||
{
|
||
fprintf_filtered (stream, "\n");
|
||
print_spaces_filtered (2 + 2 * recurse, stream);
|
||
}
|
||
else
|
||
{
|
||
wrap_here (n_spaces (2 + 2 * recurse));
|
||
}
|
||
|
||
annotate_field_begin (TYPE_FIELD_TYPE (type, i));
|
||
fprintf_filtered (stream, "%.*s",
|
||
ada_name_prefix_len (TYPE_FIELD_NAME (type, i)),
|
||
TYPE_FIELD_NAME (type, i));
|
||
annotate_field_name_end ();
|
||
fputs_filtered (" => ", stream);
|
||
annotate_field_value ();
|
||
|
||
if (TYPE_FIELD_PACKED (type, i))
|
||
{
|
||
/* Bitfields require special handling, especially due to byte
|
||
order problems. */
|
||
if (HAVE_CPLUS_STRUCT (type) && TYPE_FIELD_IGNORE (type, i))
|
||
{
|
||
fputs_styled (_("<optimized out or zero length>"),
|
||
metadata_style.style (), stream);
|
||
}
|
||
else
|
||
{
|
||
struct value *v;
|
||
int bit_pos = TYPE_FIELD_BITPOS (type, i);
|
||
int bit_size = TYPE_FIELD_BITSIZE (type, i);
|
||
struct value_print_options opts;
|
||
|
||
adjust_type_signedness (TYPE_FIELD_TYPE (type, i));
|
||
v = ada_value_primitive_packed_val
|
||
(value, nullptr,
|
||
bit_pos / HOST_CHAR_BIT,
|
||
bit_pos % HOST_CHAR_BIT,
|
||
bit_size, TYPE_FIELD_TYPE (type, i));
|
||
opts = *options;
|
||
opts.deref_ref = 0;
|
||
common_val_print (v, stream, recurse + 1, &opts, language);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
struct value_print_options opts = *options;
|
||
|
||
opts.deref_ref = 0;
|
||
|
||
struct value *v = value_field (value, i);
|
||
common_val_print (v, stream, recurse + 1, &opts, language);
|
||
}
|
||
annotate_field_end ();
|
||
}
|
||
|
||
return comma_needed;
|
||
}
|
||
|
||
/* Implement Ada val_print'ing for the case where TYPE is
|
||
a TYPE_CODE_ARRAY of characters. */
|
||
|
||
static void
|
||
ada_val_print_string (struct type *type, const gdb_byte *valaddr,
|
||
int offset_aligned,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value_print_options *options)
|
||
{
|
||
enum bfd_endian byte_order = type_byte_order (type);
|
||
struct type *elttype = TYPE_TARGET_TYPE (type);
|
||
unsigned int eltlen;
|
||
unsigned int len;
|
||
|
||
/* We know that ELTTYPE cannot possibly be null, because we assume
|
||
that we're called only when TYPE is a string-like type.
|
||
Similarly, the size of ELTTYPE should also be non-null, since
|
||
it's a character-like type. */
|
||
gdb_assert (elttype != NULL);
|
||
gdb_assert (TYPE_LENGTH (elttype) != 0);
|
||
|
||
eltlen = TYPE_LENGTH (elttype);
|
||
len = TYPE_LENGTH (type) / eltlen;
|
||
|
||
/* If requested, look for the first null char and only print
|
||
elements up to it. */
|
||
if (options->stop_print_at_null)
|
||
{
|
||
int temp_len;
|
||
|
||
/* Look for a NULL char. */
|
||
for (temp_len = 0;
|
||
(temp_len < len
|
||
&& temp_len < options->print_max
|
||
&& char_at (valaddr + offset_aligned,
|
||
temp_len, eltlen, byte_order) != 0);
|
||
temp_len += 1);
|
||
len = temp_len;
|
||
}
|
||
|
||
printstr (stream, elttype, valaddr + offset_aligned, len, 0,
|
||
eltlen, options);
|
||
}
|
||
|
||
/* Implement Ada val_print-ing for GNAT arrays (Eg. fat pointers,
|
||
thin pointers, etc). */
|
||
|
||
static void
|
||
ada_val_print_gnat_array (struct value *val,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value_print_options *options)
|
||
{
|
||
scoped_value_mark free_values;
|
||
|
||
struct type *type = ada_check_typedef (value_type (val));
|
||
|
||
/* If this is a reference, coerce it now. This helps taking care
|
||
of the case where ADDRESS is meaningless because original_value
|
||
was not an lval. */
|
||
val = coerce_ref (val);
|
||
if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF) /* array access type. */
|
||
val = ada_coerce_to_simple_array_ptr (val);
|
||
else
|
||
val = ada_coerce_to_simple_array (val);
|
||
if (val == NULL)
|
||
{
|
||
gdb_assert (TYPE_CODE (type) == TYPE_CODE_TYPEDEF);
|
||
fprintf_filtered (stream, "0x0");
|
||
}
|
||
else
|
||
common_val_print (val, stream, recurse, options,
|
||
language_def (language_ada));
|
||
}
|
||
|
||
/* Implement Ada value_print'ing for the case where TYPE is a
|
||
TYPE_CODE_PTR. */
|
||
|
||
static void
|
||
ada_value_print_ptr (struct value *val,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value_print_options *options)
|
||
{
|
||
common_val_print (val, stream, recurse, options, language_def (language_c));
|
||
|
||
struct type *type = ada_check_typedef (value_type (val));
|
||
if (ada_is_tag_type (type))
|
||
{
|
||
const char *name = ada_tag_name (val);
|
||
|
||
if (name != NULL)
|
||
fprintf_filtered (stream, " (%s)", name);
|
||
}
|
||
}
|
||
|
||
/* Implement Ada val_print'ing for the case where TYPE is
|
||
a TYPE_CODE_INT or TYPE_CODE_RANGE. */
|
||
|
||
static void
|
||
ada_value_print_num (struct value *val, struct ui_file *stream, int recurse,
|
||
const struct value_print_options *options)
|
||
{
|
||
struct type *type = ada_check_typedef (value_type (val));
|
||
const gdb_byte *valaddr = value_contents_for_printing (val);
|
||
|
||
if (ada_is_fixed_point_type (type))
|
||
{
|
||
struct value *scale = ada_scaling_factor (type);
|
||
val = value_cast (value_type (scale), val);
|
||
val = value_binop (val, scale, BINOP_MUL);
|
||
|
||
const char *fmt = TYPE_LENGTH (type) < 4 ? "%.11g" : "%.17g";
|
||
std::string str
|
||
= target_float_to_string (value_contents (val), value_type (val), fmt);
|
||
fputs_filtered (str.c_str (), stream);
|
||
return;
|
||
}
|
||
else if (TYPE_CODE (type) == TYPE_CODE_RANGE
|
||
&& (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_ENUM
|
||
|| TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_BOOL
|
||
|| TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CHAR))
|
||
{
|
||
/* For enum-valued ranges, we want to recurse, because we'll end
|
||
up printing the constant's name rather than its numeric
|
||
value. Character and fixed-point types are also printed
|
||
differently, so recuse for those as well. */
|
||
struct type *target_type = TYPE_TARGET_TYPE (type);
|
||
val = value_cast (target_type, val);
|
||
common_val_print (val, stream, recurse + 1, options,
|
||
language_def (language_ada));
|
||
return;
|
||
}
|
||
else
|
||
{
|
||
int format = (options->format ? options->format
|
||
: options->output_format);
|
||
|
||
if (format)
|
||
{
|
||
struct value_print_options opts = *options;
|
||
|
||
opts.format = format;
|
||
value_print_scalar_formatted (val, &opts, 0, stream);
|
||
}
|
||
else if (ada_is_system_address_type (type))
|
||
{
|
||
/* FIXME: We want to print System.Address variables using
|
||
the same format as for any access type. But for some
|
||
reason GNAT encodes the System.Address type as an int,
|
||
so we have to work-around this deficiency by handling
|
||
System.Address values as a special case. */
|
||
|
||
struct gdbarch *gdbarch = get_type_arch (type);
|
||
struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
|
||
CORE_ADDR addr = extract_typed_address (valaddr, ptr_type);
|
||
|
||
fprintf_filtered (stream, "(");
|
||
type_print (type, "", stream, -1);
|
||
fprintf_filtered (stream, ") ");
|
||
fputs_filtered (paddress (gdbarch, addr), stream);
|
||
}
|
||
else
|
||
{
|
||
value_print_scalar_formatted (val, options, 0, stream);
|
||
if (ada_is_character_type (type))
|
||
{
|
||
LONGEST c;
|
||
|
||
fputs_filtered (" ", stream);
|
||
c = unpack_long (type, valaddr);
|
||
ada_printchar (c, type, stream);
|
||
}
|
||
}
|
||
return;
|
||
}
|
||
}
|
||
|
||
/* Implement Ada val_print'ing for the case where TYPE is
|
||
a TYPE_CODE_ENUM. */
|
||
|
||
static void
|
||
ada_val_print_enum (struct value *value, struct ui_file *stream, int recurse,
|
||
const struct value_print_options *options)
|
||
{
|
||
int i;
|
||
unsigned int len;
|
||
LONGEST val;
|
||
|
||
if (options->format)
|
||
{
|
||
value_print_scalar_formatted (value, options, 0, stream);
|
||
return;
|
||
}
|
||
|
||
struct type *type = ada_check_typedef (value_type (value));
|
||
const gdb_byte *valaddr = value_contents_for_printing (value);
|
||
int offset_aligned = ada_aligned_value_addr (type, valaddr) - valaddr;
|
||
|
||
len = TYPE_NFIELDS (type);
|
||
val = unpack_long (type, valaddr + offset_aligned);
|
||
for (i = 0; i < len; i++)
|
||
{
|
||
QUIT;
|
||
if (val == TYPE_FIELD_ENUMVAL (type, i))
|
||
break;
|
||
}
|
||
|
||
if (i < len)
|
||
{
|
||
const char *name = ada_enum_name (TYPE_FIELD_NAME (type, i));
|
||
|
||
if (name[0] == '\'')
|
||
fprintf_filtered (stream, "%ld %ps", (long) val,
|
||
styled_string (variable_name_style.style (),
|
||
name));
|
||
else
|
||
fputs_styled (name, variable_name_style.style (), stream);
|
||
}
|
||
else
|
||
print_longest (stream, 'd', 0, val);
|
||
}
|
||
|
||
/* Implement Ada val_print'ing for the case where the type is
|
||
TYPE_CODE_STRUCT or TYPE_CODE_UNION. */
|
||
|
||
static void
|
||
ada_val_print_struct_union (struct value *value,
|
||
struct ui_file *stream,
|
||
int recurse,
|
||
const struct value_print_options *options)
|
||
{
|
||
if (ada_is_bogus_array_descriptor (value_type (value)))
|
||
{
|
||
fprintf_filtered (stream, "(...?)");
|
||
return;
|
||
}
|
||
|
||
fprintf_filtered (stream, "(");
|
||
|
||
if (print_field_values (value, value, stream, recurse, options,
|
||
0, language_def (language_ada)) != 0
|
||
&& options->prettyformat)
|
||
{
|
||
fprintf_filtered (stream, "\n");
|
||
print_spaces_filtered (2 * recurse, stream);
|
||
}
|
||
|
||
fprintf_filtered (stream, ")");
|
||
}
|
||
|
||
/* Implement Ada value_print'ing for the case where TYPE is a
|
||
TYPE_CODE_ARRAY. */
|
||
|
||
static void
|
||
ada_value_print_array (struct value *val, struct ui_file *stream, int recurse,
|
||
const struct value_print_options *options)
|
||
{
|
||
struct type *type = ada_check_typedef (value_type (val));
|
||
|
||
/* For an array of characters, print with string syntax. */
|
||
if (ada_is_string_type (type)
|
||
&& (options->format == 0 || options->format == 's'))
|
||
{
|
||
const gdb_byte *valaddr = value_contents_for_printing (val);
|
||
int offset_aligned = ada_aligned_value_addr (type, valaddr) - valaddr;
|
||
|
||
ada_val_print_string (type, valaddr, offset_aligned, stream, recurse,
|
||
options);
|
||
return;
|
||
}
|
||
|
||
fprintf_filtered (stream, "(");
|
||
print_optional_low_bound (stream, type, options);
|
||
if (TYPE_FIELD_BITSIZE (type, 0) > 0)
|
||
{
|
||
const gdb_byte *valaddr = value_contents_for_printing (val);
|
||
int offset_aligned = ada_aligned_value_addr (type, valaddr) - valaddr;
|
||
val_print_packed_array_elements (type, valaddr, offset_aligned,
|
||
stream, recurse, options);
|
||
}
|
||
else
|
||
value_print_array_elements (val, stream, recurse, options, 0);
|
||
fprintf_filtered (stream, ")");
|
||
}
|
||
|
||
/* Implement Ada val_print'ing for the case where TYPE is
|
||
a TYPE_CODE_REF. */
|
||
|
||
static void
|
||
ada_val_print_ref (struct type *type, const gdb_byte *valaddr,
|
||
int offset, int offset_aligned, CORE_ADDR address,
|
||
struct ui_file *stream, int recurse,
|
||
struct value *original_value,
|
||
const struct value_print_options *options)
|
||
{
|
||
/* For references, the debugger is expected to print the value as
|
||
an address if DEREF_REF is null. But printing an address in place
|
||
of the object value would be confusing to an Ada programmer.
|
||
So, for Ada values, we print the actual dereferenced value
|
||
regardless. */
|
||
struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
|
||
struct value *deref_val;
|
||
CORE_ADDR deref_val_int;
|
||
|
||
if (TYPE_CODE (elttype) == TYPE_CODE_UNDEF)
|
||
{
|
||
fputs_styled ("<ref to undefined type>", metadata_style.style (),
|
||
stream);
|
||
return;
|
||
}
|
||
|
||
deref_val = coerce_ref_if_computed (original_value);
|
||
if (deref_val)
|
||
{
|
||
if (ada_is_tagged_type (value_type (deref_val), 1))
|
||
deref_val = ada_tag_value_at_base_address (deref_val);
|
||
|
||
common_val_print (deref_val, stream, recurse + 1, options,
|
||
language_def (language_ada));
|
||
return;
|
||
}
|
||
|
||
deref_val_int = unpack_pointer (type, valaddr + offset_aligned);
|
||
if (deref_val_int == 0)
|
||
{
|
||
fputs_filtered ("(null)", stream);
|
||
return;
|
||
}
|
||
|
||
deref_val
|
||
= ada_value_ind (value_from_pointer (lookup_pointer_type (elttype),
|
||
deref_val_int));
|
||
if (ada_is_tagged_type (value_type (deref_val), 1))
|
||
deref_val = ada_tag_value_at_base_address (deref_val);
|
||
|
||
/* Make sure that the object does not have an unreasonable size
|
||
before trying to print it. This can happen for instance with
|
||
references to dynamic objects whose contents is uninitialized
|
||
(Eg: an array whose bounds are not set yet). */
|
||
ada_ensure_varsize_limit (value_type (deref_val));
|
||
|
||
if (value_lazy (deref_val))
|
||
value_fetch_lazy (deref_val);
|
||
|
||
common_val_print (deref_val, stream, recurse + 1,
|
||
options, language_def (language_ada));
|
||
}
|
||
|
||
/* See the comment on ada_value_print. This function differs in that
|
||
it does not catch evaluation errors (leaving that to
|
||
ada_value_print). */
|
||
|
||
static void
|
||
ada_value_print_1 (struct value *val, struct ui_file *stream, int recurse,
|
||
const struct value_print_options *options)
|
||
{
|
||
struct type *type = ada_check_typedef (value_type (val));
|
||
|
||
if (ada_is_array_descriptor_type (type)
|
||
|| (ada_is_constrained_packed_array_type (type)
|
||
&& TYPE_CODE (type) != TYPE_CODE_PTR))
|
||
{
|
||
ada_val_print_gnat_array (val, stream, recurse, options);
|
||
return;
|
||
}
|
||
|
||
val = ada_to_fixed_value (val);
|
||
type = value_type (val);
|
||
struct type *saved_type = type;
|
||
|
||
const gdb_byte *valaddr = value_contents_for_printing (val);
|
||
CORE_ADDR address = value_address (val);
|
||
gdb::array_view<const gdb_byte> view
|
||
= gdb::make_array_view (valaddr, TYPE_LENGTH (type));
|
||
type = ada_check_typedef (resolve_dynamic_type (type, view, address));
|
||
if (type != saved_type)
|
||
{
|
||
val = value_copy (val);
|
||
deprecated_set_value_type (val, type);
|
||
}
|
||
|
||
switch (TYPE_CODE (type))
|
||
{
|
||
default:
|
||
common_val_print (val, stream, recurse, options,
|
||
language_def (language_c));
|
||
break;
|
||
|
||
case TYPE_CODE_PTR:
|
||
ada_value_print_ptr (val, stream, recurse, options);
|
||
break;
|
||
|
||
case TYPE_CODE_INT:
|
||
case TYPE_CODE_RANGE:
|
||
ada_value_print_num (val, stream, recurse, options);
|
||
break;
|
||
|
||
case TYPE_CODE_ENUM:
|
||
ada_val_print_enum (val, stream, recurse, options);
|
||
break;
|
||
|
||
case TYPE_CODE_FLT:
|
||
if (options->format)
|
||
{
|
||
common_val_print (val, stream, recurse, options,
|
||
language_def (language_c));
|
||
break;
|
||
}
|
||
|
||
ada_print_floating (valaddr, type, stream);
|
||
break;
|
||
|
||
case TYPE_CODE_UNION:
|
||
case TYPE_CODE_STRUCT:
|
||
ada_val_print_struct_union (val, stream, recurse, options);
|
||
break;
|
||
|
||
case TYPE_CODE_ARRAY:
|
||
ada_value_print_array (val, stream, recurse, options);
|
||
return;
|
||
|
||
case TYPE_CODE_REF:
|
||
ada_val_print_ref (type, valaddr, 0, 0,
|
||
address, stream, recurse, val,
|
||
options);
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* See ada-lang.h. */
|
||
|
||
void
|
||
ada_value_print_inner (struct value *val, struct ui_file *stream,
|
||
int recurse,
|
||
const struct value_print_options *options)
|
||
{
|
||
try
|
||
{
|
||
ada_value_print_1 (val, stream, recurse, options);
|
||
}
|
||
catch (const gdb_exception_error &except)
|
||
{
|
||
fprintf_styled (stream, metadata_style.style (),
|
||
_("<error reading variable: %s>"),
|
||
except.what ());
|
||
}
|
||
}
|
||
|
||
void
|
||
ada_value_print (struct value *val0, struct ui_file *stream,
|
||
const struct value_print_options *options)
|
||
{
|
||
struct value *val = ada_to_fixed_value (val0);
|
||
struct type *type = ada_check_typedef (value_type (val));
|
||
struct value_print_options opts;
|
||
|
||
/* If it is a pointer, indicate what it points to. */
|
||
if (TYPE_CODE (type) == TYPE_CODE_PTR)
|
||
{
|
||
/* Hack: don't print (char *) for char strings. Their
|
||
type is indicated by the quoted string anyway. */
|
||
if (TYPE_LENGTH (TYPE_TARGET_TYPE (type)) != sizeof (char)
|
||
|| TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_INT
|
||
|| TYPE_UNSIGNED (TYPE_TARGET_TYPE (type)))
|
||
{
|
||
fprintf_filtered (stream, "(");
|
||
type_print (type, "", stream, -1);
|
||
fprintf_filtered (stream, ") ");
|
||
}
|
||
}
|
||
else if (ada_is_array_descriptor_type (type))
|
||
{
|
||
/* We do not print the type description unless TYPE is an array
|
||
access type (this is encoded by the compiler as a typedef to
|
||
a fat pointer - hence the check against TYPE_CODE_TYPEDEF). */
|
||
if (TYPE_CODE (type) == TYPE_CODE_TYPEDEF)
|
||
{
|
||
fprintf_filtered (stream, "(");
|
||
type_print (type, "", stream, -1);
|
||
fprintf_filtered (stream, ") ");
|
||
}
|
||
}
|
||
else if (ada_is_bogus_array_descriptor (type))
|
||
{
|
||
fprintf_filtered (stream, "(");
|
||
type_print (type, "", stream, -1);
|
||
fprintf_filtered (stream, ") (...?)");
|
||
return;
|
||
}
|
||
|
||
opts = *options;
|
||
opts.deref_ref = 1;
|
||
common_val_print (val, stream, 0, &opts, current_language);
|
||
}
|