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- /* Support for printing Ada values for GDB, the GNU debugger.
- Copyright (C) 1986-2022 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 3 of the License, or
- (at your option) any later version.
- 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 <ctype.h>
- #include "gdbtypes.h"
- #include "expression.h"
- #include "value.h"
- #include "valprint.h"
- #include "language.h"
- #include "annotate.h"
- #include "ada-lang.h"
- #include "target-float.h"
- #include "cli/cli-style.h"
- #include "gdbarch.h"
- static int print_field_values (struct value *, struct value *,
- struct ui_file *, int,
- const struct value_print_options *,
- int, const struct language_defn *);
- /* Make TYPE unsigned if its range of values includes no negatives. */
- static void
- adjust_type_signedness (struct type *type)
- {
- if (type != NULL && type->code () == TYPE_CODE_RANGE
- && type->bounds ()->low.const_val () >= 0)
- type->set_is_unsigned (true);
- }
- /* Assuming TYPE is a simple array type, prints its lower bound on STREAM,
- if non-standard (i.e., other than 1 for numbers, other than lower bound
- of index type for enumerated type). Returns 1 if something printed,
- otherwise 0. */
- static int
- print_optional_low_bound (struct ui_file *stream, struct type *type,
- const struct value_print_options *options)
- {
- struct type *index_type;
- LONGEST low_bound;
- LONGEST high_bound;
- if (options->print_array_indexes)
- return 0;
- if (!get_array_bounds (type, &low_bound, &high_bound))
- return 0;
- /* If this is an empty array, then don't print the lower bound.
- That would be confusing, because we would print the lower bound,
- followed by... nothing! */
- if (low_bound > high_bound)
- return 0;
- index_type = type->index_type ();
- while (index_type->code () == TYPE_CODE_RANGE)
- {
- /* We need to know what the base type is, in order to do the
- appropriate check below. Otherwise, if this is a subrange
- of an enumerated type, where the underlying value of the
- first element is typically 0, we might test the low bound
- against the wrong value. */
- index_type = TYPE_TARGET_TYPE (index_type);
- }
- /* Don't print the lower bound if it's the default one. */
- switch (index_type->code ())
- {
- case TYPE_CODE_BOOL:
- case TYPE_CODE_CHAR:
- if (low_bound == 0)
- return 0;
- break;
- case TYPE_CODE_ENUM:
- if (low_bound == 0)
- return 0;
- low_bound = index_type->field (low_bound).loc_enumval ();
- break;
- case TYPE_CODE_UNDEF:
- index_type = NULL;
- /* FALL THROUGH */
- default:
- if (low_bound == 1)
- return 0;
- break;
- }
- ada_print_scalar (index_type, low_bound, stream);
- gdb_printf (stream, " => ");
- return 1;
- }
- /* Version of val_print_array_elements for GNAT-style packed arrays.
- Prints elements of packed array of type TYPE from VALADDR on
- STREAM. Formats according to OPTIONS and separates with commas.
- RECURSE is the recursion (nesting) level. TYPE must have been
- decoded (as by ada_coerce_to_simple_array). */
- static void
- val_print_packed_array_elements (struct type *type, const gdb_byte *valaddr,
- int offset, struct ui_file *stream,
- int recurse,
- const struct value_print_options *options)
- {
- unsigned int i;
- unsigned int things_printed = 0;
- unsigned len;
- struct type *elttype, *index_type;
- unsigned long bitsize = TYPE_FIELD_BITSIZE (type, 0);
- struct value *mark = value_mark ();
- LONGEST low = 0;
- elttype = TYPE_TARGET_TYPE (type);
- index_type = type->index_type ();
- {
- LONGEST high;
- if (!get_discrete_bounds (index_type, &low, &high))
- len = 1;
- else if (low > high)
- {
- /* The array length should normally be HIGH_POS - LOW_POS + 1.
- But in Ada we allow LOW_POS to be greater than HIGH_POS for
- empty arrays. In that situation, the array length is just zero,
- not negative! */
- len = 0;
- }
- else
- len = high - low + 1;
- }
- if (index_type->code () == TYPE_CODE_RANGE)
- index_type = TYPE_TARGET_TYPE (index_type);
- i = 0;
- annotate_array_section_begin (i, elttype);
- while (i < len && things_printed < options->print_max)
- {
- struct value *v0, *v1;
- int i0;
- if (i != 0)
- {
- if (options->prettyformat_arrays)
- {
- gdb_printf (stream, ",\n");
- print_spaces (2 + 2 * recurse, stream);
- }
- else
- {
- gdb_printf (stream, ", ");
- }
- }
- else if (options->prettyformat_arrays)
- {
- gdb_printf (stream, "\n");
- print_spaces (2 + 2 * recurse, stream);
- }
- stream->wrap_here (2 + 2 * recurse);
- maybe_print_array_index (index_type, i + low, stream, options);
- i0 = i;
- v0 = ada_value_primitive_packed_val (NULL, valaddr + offset,
- (i0 * bitsize) / HOST_CHAR_BIT,
- (i0 * bitsize) % HOST_CHAR_BIT,
- bitsize, elttype);
- while (1)
- {
- i += 1;
- if (i >= len)
- break;
- v1 = ada_value_primitive_packed_val (NULL, valaddr + offset,
- (i * bitsize) / HOST_CHAR_BIT,
- (i * bitsize) % HOST_CHAR_BIT,
- bitsize, elttype);
- if (TYPE_LENGTH (check_typedef (value_type (v0)))
- != TYPE_LENGTH (check_typedef (value_type (v1))))
- break;
- if (!value_contents_eq (v0, value_embedded_offset (v0),
- v1, value_embedded_offset (v1),
- TYPE_LENGTH (check_typedef (value_type (v0)))))
- break;
- }
- if (i - i0 > options->repeat_count_threshold)
- {
- struct value_print_options opts = *options;
- opts.deref_ref = 0;
- common_val_print (v0, stream, recurse + 1, &opts, current_language);
- annotate_elt_rep (i - i0);
- gdb_printf (stream, _(" %p[<repeats %u times>%p]"),
- metadata_style.style ().ptr (), i - i0, nullptr);
- annotate_elt_rep_end ();
- }
- else
- {
- int j;
- struct value_print_options opts = *options;
- opts.deref_ref = 0;
- for (j = i0; j < i; j += 1)
- {
- if (j > i0)
- {
- if (options->prettyformat_arrays)
- {
- gdb_printf (stream, ",\n");
- print_spaces (2 + 2 * recurse, stream);
- }
- else
- {
- gdb_printf (stream, ", ");
- }
- stream->wrap_here (2 + 2 * recurse);
- maybe_print_array_index (index_type, j + low,
- stream, options);
- }
- common_val_print (v0, stream, recurse + 1, &opts,
- current_language);
- annotate_elt ();
- }
- }
- things_printed += i - i0;
- }
- annotate_array_section_end ();
- if (i < len)
- {
- gdb_printf (stream, "...");
- }
- value_free_to_mark (mark);
- }
- /* Print the character C on STREAM as part of the contents of a literal
- string whose delimiter is QUOTER. TYPE_LEN is the length in bytes
- of the character. */
- void
- ada_emit_char (int c, struct type *type, struct ui_file *stream,
- int quoter, int type_len)
- {
- /* If this character fits in the normal ASCII range, and is
- a printable character, then print the character as if it was
- an ASCII character, even if this is a wide character.
- The UCHAR_MAX check is necessary because the isascii function
- requires that its argument have a value of an unsigned char,
- or EOF (EOF is obviously not printable). */
- if (c <= UCHAR_MAX && isascii (c) && isprint (c))
- {
- if (c == quoter && c == '"')
- gdb_printf (stream, "\"\"");
- else
- gdb_printf (stream, "%c", c);
- }
- else
- {
- /* Follow GNAT's lead here and only use 6 digits for
- wide_wide_character. */
- gdb_printf (stream, "[\"%0*x\"]", std::min (6, type_len * 2), c);
- }
- }
- /* Character #I of STRING, given that TYPE_LEN is the size in bytes
- of a character. */
- static int
- char_at (const gdb_byte *string, int i, int type_len,
- enum bfd_endian byte_order)
- {
- if (type_len == 1)
- return string[i];
- else
- return (int) extract_unsigned_integer (string + type_len * i,
- type_len, byte_order);
- }
- /* Print a floating-point value of type TYPE, pointed to in GDB by
- VALADDR, on STREAM. Use Ada formatting conventions: there must be
- a decimal point, and at least one digit before and after the
- point. We use the GNAT format for NaNs and infinities. */
- static void
- ada_print_floating (const gdb_byte *valaddr, struct type *type,
- struct ui_file *stream)
- {
- string_file tmp_stream;
- print_floating (valaddr, type, &tmp_stream);
- std::string s = tmp_stream.release ();
- size_t skip_count = 0;
- /* Don't try to modify a result representing an error. */
- if (s[0] == '<')
- {
- gdb_puts (s.c_str (), stream);
- return;
- }
- /* Modify for Ada rules. */
- size_t pos = s.find ("inf");
- if (pos == std::string::npos)
- pos = s.find ("Inf");
- if (pos == std::string::npos)
- pos = s.find ("INF");
- if (pos != std::string::npos)
- s.replace (pos, 3, "Inf");
- if (pos == std::string::npos)
- {
- pos = s.find ("nan");
- if (pos == std::string::npos)
- pos = s.find ("NaN");
- if (pos == std::string::npos)
- pos = s.find ("Nan");
- if (pos != std::string::npos)
- {
- s[pos] = s[pos + 2] = 'N';
- if (s[0] == '-')
- skip_count = 1;
- }
- }
- if (pos == std::string::npos
- && s.find ('.') == std::string::npos)
- {
- pos = s.find ('e');
- if (pos == std::string::npos)
- gdb_printf (stream, "%s.0", s.c_str ());
- else
- gdb_printf (stream, "%.*s.0%s", (int) pos, s.c_str (), &s[pos]);
- }
- else
- gdb_printf (stream, "%s", &s[skip_count]);
- }
- void
- ada_printchar (int c, struct type *type, struct ui_file *stream)
- {
- gdb_puts ("'", stream);
- ada_emit_char (c, type, stream, '\'', TYPE_LENGTH (type));
- gdb_puts ("'", stream);
- }
- /* [From print_type_scalar in typeprint.c]. Print VAL on STREAM in a
- form appropriate for TYPE, if non-NULL. If TYPE is NULL, print VAL
- like a default signed integer. */
- void
- ada_print_scalar (struct type *type, LONGEST val, struct ui_file *stream)
- {
- unsigned int i;
- unsigned len;
- if (!type)
- {
- print_longest (stream, 'd', 0, val);
- return;
- }
- type = ada_check_typedef (type);
- switch (type->code ())
- {
- case TYPE_CODE_ENUM:
- len = type->num_fields ();
- for (i = 0; i < len; i++)
- {
- if (type->field (i).loc_enumval () == val)
- {
- break;
- }
- }
- if (i < len)
- {
- fputs_styled (ada_enum_name (type->field (i).name ()),
- variable_name_style.style (), stream);
- }
- else
- {
- print_longest (stream, 'd', 0, val);
- }
- break;
- case TYPE_CODE_INT:
- print_longest (stream, type->is_unsigned () ? 'u' : 'd', 0, val);
- break;
- case TYPE_CODE_CHAR:
- current_language->printchar (val, type, stream);
- break;
- case TYPE_CODE_BOOL:
- gdb_printf (stream, val ? "true" : "false");
- break;
- case TYPE_CODE_RANGE:
- ada_print_scalar (TYPE_TARGET_TYPE (type), val, stream);
- return;
- 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)
- {
- gdb_puts ("\"\"", 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)
- {
- gdb_puts (", ", 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)
- {
- gdb_puts ("\", ", stream);
- in_quotes = 0;
- }
- gdb_puts ("'", stream);
- ada_emit_char (char_at (string, i, type_len, byte_order),
- elttype, stream, '\'', type_len);
- gdb_puts ("'", stream);
- gdb_printf (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)
- {
- gdb_puts ("\"", 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)
- gdb_puts ("\"", stream);
- if (force_ellipses || i < length)
- gdb_puts ("...", 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 (field_num).type ();
- 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->num_fields ();
- 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 = ada_value_primitive_field (value, 0,
- i, type);
- 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)
- gdb_printf (stream, ", ");
- comma_needed = 1;
- if (options->prettyformat)
- {
- gdb_printf (stream, "\n");
- print_spaces (2 + 2 * recurse, stream);
- }
- else
- {
- stream->wrap_here (2 + 2 * recurse);
- }
- annotate_field_begin (type->field (i).type ());
- gdb_printf (stream, "%.*s",
- ada_name_prefix_len (type->field (i).name ()),
- type->field (i).name ());
- annotate_field_name_end ();
- gdb_puts (" => ", 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 (i).loc_bitpos ();
- int bit_size = TYPE_FIELD_BITSIZE (type, i);
- struct value_print_options opts;
- adjust_type_signedness (type->field (i).type ());
- v = ada_value_primitive_packed_val
- (value, nullptr,
- bit_pos / HOST_CHAR_BIT,
- bit_pos % HOST_CHAR_BIT,
- bit_size, type->field (i).type ());
- 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 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)
- {
- if (!options->format
- && TYPE_TARGET_TYPE (value_type (val))->code () == TYPE_CODE_INT
- && TYPE_LENGTH (TYPE_TARGET_TYPE (value_type (val))) == 0)
- {
- gdb_puts ("null", stream);
- return;
- }
- 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))
- {
- gdb::unique_xmalloc_ptr<char> name = ada_tag_name (val);
- if (name != NULL)
- gdb_printf (stream, " (%s)", name.get ());
- }
- }
- /* 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).data ();
- if (type->code () == TYPE_CODE_RANGE
- && (TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_ENUM
- || TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_BOOL
- || TYPE_TARGET_TYPE (type)->code () == 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 = type->arch ();
- struct type *ptr_type = builtin_type (gdbarch)->builtin_data_ptr;
- CORE_ADDR addr = extract_typed_address (valaddr, ptr_type);
- gdb_printf (stream, "(");
- type_print (type, "", stream, -1);
- gdb_printf (stream, ") ");
- gdb_puts (paddress (gdbarch, addr), stream);
- }
- else
- {
- value_print_scalar_formatted (val, options, 0, stream);
- if (ada_is_character_type (type))
- {
- LONGEST c;
- gdb_puts (" ", 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).data ();
- int offset_aligned = ada_aligned_value_addr (type, valaddr) - valaddr;
- len = type->num_fields ();
- val = unpack_long (type, valaddr + offset_aligned);
- for (i = 0; i < len; i++)
- {
- QUIT;
- if (val == type->field (i).loc_enumval ())
- break;
- }
- if (i < len)
- {
- const char *name = ada_enum_name (type->field (i).name ());
- if (name[0] == '\'')
- gdb_printf (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)))
- {
- gdb_printf (stream, "(...?)");
- return;
- }
- gdb_printf (stream, "(");
- if (print_field_values (value, value, stream, recurse, options,
- 0, language_def (language_ada)) != 0
- && options->prettyformat)
- {
- gdb_printf (stream, "\n");
- print_spaces (2 * recurse, stream);
- }
- gdb_printf (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).data ();
- int offset_aligned = ada_aligned_value_addr (type, valaddr) - valaddr;
- ada_val_print_string (type, valaddr, offset_aligned, stream, recurse,
- options);
- return;
- }
- gdb_printf (stream, "(");
- print_optional_low_bound (stream, type, options);
- if (value_entirely_optimized_out (val))
- val_print_optimized_out (val, stream);
- else if (TYPE_FIELD_BITSIZE (type, 0) > 0)
- {
- const gdb_byte *valaddr = value_contents_for_printing (val).data ();
- 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);
- gdb_printf (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 (elttype->code () == 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)
- {
- gdb_puts ("(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);
- 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 its
- caller). */
- void
- ada_value_print_inner (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_CODE_PTR))
- {
- /* 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);
- val = ada_get_decoded_value (val);
- if (val == nullptr)
- {
- gdb_assert (type->code () == TYPE_CODE_TYPEDEF);
- gdb_printf (stream, "0x0");
- return;
- }
- }
- else
- val = ada_to_fixed_value (val);
- type = value_type (val);
- struct type *saved_type = type;
- const gdb_byte *valaddr = value_contents_for_printing (val).data ();
- 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);
- }
- if (is_fixed_point_type (type))
- type = type->fixed_point_type_base_type ();
- switch (type->code ())
- {
- 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;
- }
- }
- 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; but not for
- "void *" pointers. */
- if (type->code () == TYPE_CODE_PTR
- && !(TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_INT
- && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) == 0))
- {
- /* 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_TARGET_TYPE (type)->code () != TYPE_CODE_INT
- || TYPE_TARGET_TYPE (type)->is_unsigned ())
- {
- gdb_printf (stream, "(");
- type_print (type, "", stream, -1);
- gdb_printf (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_CODE_TYPEDEF)
- {
- gdb_printf (stream, "(");
- type_print (type, "", stream, -1);
- gdb_printf (stream, ") ");
- }
- }
- else if (ada_is_bogus_array_descriptor (type))
- {
- gdb_printf (stream, "(");
- type_print (type, "", stream, -1);
- gdb_printf (stream, ") (...?)");
- return;
- }
- opts = *options;
- opts.deref_ref = 1;
- common_val_print (val, stream, 0, &opts, current_language);
- }
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