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- /* Support for printing Ada types 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 "bfd.h" /* Binary File Description */
- #include "gdbtypes.h"
- #include "value.h"
- #include "c-lang.h"
- #include "cli/cli-style.h"
- #include "typeprint.h"
- #include "target-float.h"
- #include "ada-lang.h"
- #include <ctype.h>
- static int print_selected_record_field_types (struct type *, struct type *,
- int, int,
- struct ui_file *, int, int,
- const struct type_print_options *);
- static int print_record_field_types (struct type *, struct type *,
- struct ui_file *, int, int,
- const struct type_print_options *);
- static char *name_buffer;
- static int name_buffer_len;
- /* The (decoded) Ada name of TYPE. This value persists until the
- next call. */
- static char *
- decoded_type_name (struct type *type)
- {
- if (ada_type_name (type) == NULL)
- return NULL;
- else
- {
- const char *raw_name = ada_type_name (type);
- char *s, *q;
- if (name_buffer == NULL || name_buffer_len <= strlen (raw_name))
- {
- name_buffer_len = 16 + 2 * strlen (raw_name);
- name_buffer = (char *) xrealloc (name_buffer, name_buffer_len);
- }
- strcpy (name_buffer, raw_name);
- s = (char *) strstr (name_buffer, "___");
- if (s != NULL)
- *s = '\0';
- s = name_buffer + strlen (name_buffer) - 1;
- while (s > name_buffer && (s[0] != '_' || s[-1] != '_'))
- s -= 1;
- if (s == name_buffer)
- return name_buffer;
- if (!islower (s[1]))
- return NULL;
- for (s = q = name_buffer; *s != '\0'; q += 1)
- {
- if (s[0] == '_' && s[1] == '_')
- {
- *q = '.';
- s += 2;
- }
- else
- {
- *q = *s;
- s += 1;
- }
- }
- *q = '\0';
- return name_buffer;
- }
- }
- /* Return nonzero if TYPE is a subrange type, and its bounds
- are identical to the bounds of its subtype. */
- static int
- type_is_full_subrange_of_target_type (struct type *type)
- {
- struct type *subtype;
- if (type->code () != TYPE_CODE_RANGE)
- return 0;
- subtype = TYPE_TARGET_TYPE (type);
- if (subtype == NULL)
- return 0;
- if (is_dynamic_type (type))
- return 0;
- if (ada_discrete_type_low_bound (type)
- != ada_discrete_type_low_bound (subtype))
- return 0;
- if (ada_discrete_type_high_bound (type)
- != ada_discrete_type_high_bound (subtype))
- return 0;
- return 1;
- }
- /* Print TYPE on STREAM, preferably as a range if BOUNDS_PREFERED_P
- is nonzero. */
- static void
- print_range (struct type *type, struct ui_file *stream,
- int bounds_prefered_p)
- {
- if (!bounds_prefered_p)
- {
- /* Try stripping all TYPE_CODE_RANGE layers whose bounds
- are identical to the bounds of their subtype. When
- the bounds of both types match, it can allow us to
- print a range using the name of its base type, which
- is easier to read. For instance, we would print...
- array (character) of ...
- ... instead of...
- array ('["00"]' .. '["ff"]') of ... */
- while (type_is_full_subrange_of_target_type (type))
- type = TYPE_TARGET_TYPE (type);
- }
- switch (type->code ())
- {
- case TYPE_CODE_RANGE:
- case TYPE_CODE_ENUM:
- {
- LONGEST lo = 0, hi = 0; /* init for gcc -Wall */
- int got_error = 0;
- try
- {
- lo = ada_discrete_type_low_bound (type);
- hi = ada_discrete_type_high_bound (type);
- }
- catch (const gdb_exception_error &e)
- {
- /* This can happen when the range is dynamic. Sometimes,
- resolving dynamic property values requires us to have
- access to an actual object, which is not available
- when the user is using the "ptype" command on a type.
- Print the range as an unbounded range. */
- gdb_printf (stream, "<>");
- got_error = 1;
- }
- if (!got_error)
- {
- ada_print_scalar (type, lo, stream);
- gdb_printf (stream, " .. ");
- ada_print_scalar (type, hi, stream);
- }
- }
- break;
- default:
- gdb_printf (stream, "%.*s",
- ada_name_prefix_len (type->name ()),
- type->name ());
- break;
- }
- }
- /* Print the number or discriminant bound at BOUNDS+*N on STREAM, and
- set *N past the bound and its delimiter, if any. */
- static void
- print_range_bound (struct type *type, const char *bounds, int *n,
- struct ui_file *stream)
- {
- LONGEST B;
- if (ada_scan_number (bounds, *n, &B, n))
- {
- /* STABS decodes all range types which bounds are 0 .. -1 as
- unsigned integers (ie. the type code is TYPE_CODE_INT, not
- TYPE_CODE_RANGE). Unfortunately, ada_print_scalar() relies
- on the unsigned flag to determine whether the bound should
- be printed as a signed or an unsigned value. This causes
- the upper bound of the 0 .. -1 range types to be printed as
- a very large unsigned number instead of -1.
- To workaround this stabs deficiency, we replace the TYPE by NULL
- to indicate default output when we detect that the bound is negative,
- and the type is a TYPE_CODE_INT. The bound is negative when
- 'm' is the last character of the number scanned in BOUNDS. */
- if (bounds[*n - 1] == 'm' && type->code () == TYPE_CODE_INT)
- type = NULL;
- ada_print_scalar (type, B, stream);
- if (bounds[*n] == '_')
- *n += 2;
- }
- else
- {
- int bound_len;
- const char *bound = bounds + *n;
- const char *pend;
- pend = strstr (bound, "__");
- if (pend == NULL)
- *n += bound_len = strlen (bound);
- else
- {
- bound_len = pend - bound;
- *n += bound_len + 2;
- }
- gdb_printf (stream, "%.*s", bound_len, bound);
- }
- }
- /* Assuming NAME[0 .. NAME_LEN-1] is the name of a range type, print
- the value (if found) of the bound indicated by SUFFIX ("___L" or
- "___U") according to the ___XD conventions. */
- static void
- print_dynamic_range_bound (struct type *type, const char *name, int name_len,
- const char *suffix, struct ui_file *stream)
- {
- LONGEST B;
- std::string name_buf (name, name_len);
- name_buf += suffix;
- if (get_int_var_value (name_buf.c_str (), B))
- ada_print_scalar (type, B, stream);
- else
- gdb_printf (stream, "?");
- }
- /* Print RAW_TYPE as a range type, using any bound information
- following the GNAT encoding (if available).
- If BOUNDS_PREFERED_P is nonzero, force the printing of the range
- using its bounds. Otherwise, try printing the range without
- printing the value of the bounds, if possible (this is only
- considered a hint, not a guaranty). */
- static void
- print_range_type (struct type *raw_type, struct ui_file *stream,
- int bounds_prefered_p)
- {
- const char *name;
- struct type *base_type;
- const char *subtype_info;
- gdb_assert (raw_type != NULL);
- name = raw_type->name ();
- gdb_assert (name != NULL);
- if (raw_type->code () == TYPE_CODE_RANGE)
- base_type = TYPE_TARGET_TYPE (raw_type);
- else
- base_type = raw_type;
- subtype_info = strstr (name, "___XD");
- if (subtype_info == NULL)
- print_range (raw_type, stream, bounds_prefered_p);
- else
- {
- int prefix_len = subtype_info - name;
- const char *bounds_str;
- int n;
- subtype_info += 5;
- bounds_str = strchr (subtype_info, '_');
- n = 1;
- if (*subtype_info == 'L')
- {
- print_range_bound (base_type, bounds_str, &n, stream);
- subtype_info += 1;
- }
- else
- print_dynamic_range_bound (base_type, name, prefix_len, "___L",
- stream);
- gdb_printf (stream, " .. ");
- if (*subtype_info == 'U')
- print_range_bound (base_type, bounds_str, &n, stream);
- else
- print_dynamic_range_bound (base_type, name, prefix_len, "___U",
- stream);
- }
- }
- /* Print enumerated type TYPE on STREAM. */
- static void
- print_enum_type (struct type *type, struct ui_file *stream)
- {
- int len = type->num_fields ();
- int i;
- LONGEST lastval;
- gdb_printf (stream, "(");
- stream->wrap_here (1);
- lastval = 0;
- for (i = 0; i < len; i++)
- {
- QUIT;
- if (i)
- gdb_printf (stream, ", ");
- stream->wrap_here (4);
- fputs_styled (ada_enum_name (type->field (i).name ()),
- variable_name_style.style (), stream);
- if (lastval != type->field (i).loc_enumval ())
- {
- gdb_printf (stream, " => %s",
- plongest (type->field (i).loc_enumval ()));
- lastval = type->field (i).loc_enumval ();
- }
- lastval += 1;
- }
- gdb_printf (stream, ")");
- }
- /* Print simple (constrained) array type TYPE on STREAM. LEVEL is the
- recursion (indentation) level, in case the element type itself has
- nested structure, and SHOW is the number of levels of internal
- structure to show (see ada_print_type). */
- static void
- print_array_type (struct type *type, struct ui_file *stream, int show,
- int level, const struct type_print_options *flags)
- {
- int bitsize;
- int n_indices;
- struct type *elt_type = NULL;
- if (ada_is_constrained_packed_array_type (type))
- type = ada_coerce_to_simple_array_type (type);
- bitsize = 0;
- gdb_printf (stream, "array (");
- if (type == NULL)
- {
- fprintf_styled (stream, metadata_style.style (),
- _("<undecipherable array type>"));
- return;
- }
- n_indices = -1;
- if (ada_is_simple_array_type (type))
- {
- struct type *range_desc_type;
- struct type *arr_type;
- range_desc_type = ada_find_parallel_type (type, "___XA");
- ada_fixup_array_indexes_type (range_desc_type);
- bitsize = 0;
- if (range_desc_type == NULL)
- {
- for (arr_type = type; arr_type->code () == TYPE_CODE_ARRAY;
- arr_type = TYPE_TARGET_TYPE (arr_type))
- {
- if (arr_type != type)
- gdb_printf (stream, ", ");
- print_range (arr_type->index_type (), stream,
- 0 /* bounds_prefered_p */);
- if (TYPE_FIELD_BITSIZE (arr_type, 0) > 0)
- bitsize = TYPE_FIELD_BITSIZE (arr_type, 0);
- }
- }
- else
- {
- int k;
- n_indices = range_desc_type->num_fields ();
- for (k = 0, arr_type = type;
- k < n_indices;
- k += 1, arr_type = TYPE_TARGET_TYPE (arr_type))
- {
- if (k > 0)
- gdb_printf (stream, ", ");
- print_range_type (range_desc_type->field (k).type (),
- stream, 0 /* bounds_prefered_p */);
- if (TYPE_FIELD_BITSIZE (arr_type, 0) > 0)
- bitsize = TYPE_FIELD_BITSIZE (arr_type, 0);
- }
- }
- }
- else
- {
- int i, i0;
- for (i = i0 = ada_array_arity (type); i > 0; i -= 1)
- gdb_printf (stream, "%s<>", i == i0 ? "" : ", ");
- }
- elt_type = ada_array_element_type (type, n_indices);
- gdb_printf (stream, ") of ");
- stream->wrap_here (0);
- ada_print_type (elt_type, "", stream, show == 0 ? 0 : show - 1, level + 1,
- flags);
- /* Arrays with variable-length elements are never bit-packed in practice but
- compilers have to describe their stride so that we can properly fetch
- individual elements. Do not say the array is packed in this case. */
- if (bitsize > 0 && !is_dynamic_type (elt_type))
- gdb_printf (stream, " <packed: %d-bit elements>", bitsize);
- }
- /* Print the choices encoded by field FIELD_NUM of variant-part TYPE on
- STREAM, assuming that VAL_TYPE (if non-NULL) is the type of the
- values. Return non-zero if the field is an encoding of
- discriminant values, as in a standard variant record, and 0 if the
- field is not so encoded (as happens with single-component variants
- in types annotated with pragma Unchecked_Union). */
- static int
- print_choices (struct type *type, int field_num, struct ui_file *stream,
- struct type *val_type)
- {
- int have_output;
- int p;
- const char *name = type->field (field_num).name ();
- have_output = 0;
- /* Skip over leading 'V': NOTE soon to be obsolete. */
- if (name[0] == 'V')
- {
- if (!ada_scan_number (name, 1, NULL, &p))
- goto Huh;
- }
- else
- p = 0;
- while (1)
- {
- switch (name[p])
- {
- default:
- goto Huh;
- case '_':
- case '\0':
- gdb_printf (stream, " =>");
- return 1;
- case 'S':
- case 'R':
- case 'O':
- if (have_output)
- gdb_printf (stream, " | ");
- have_output = 1;
- break;
- }
- switch (name[p])
- {
- case 'S':
- {
- LONGEST W;
- if (!ada_scan_number (name, p + 1, &W, &p))
- goto Huh;
- ada_print_scalar (val_type, W, stream);
- break;
- }
- case 'R':
- {
- LONGEST L, U;
- if (!ada_scan_number (name, p + 1, &L, &p)
- || name[p] != 'T' || !ada_scan_number (name, p + 1, &U, &p))
- goto Huh;
- ada_print_scalar (val_type, L, stream);
- gdb_printf (stream, " .. ");
- ada_print_scalar (val_type, U, stream);
- break;
- }
- case 'O':
- gdb_printf (stream, "others");
- p += 1;
- break;
- }
- }
- Huh:
- gdb_printf (stream, "? =>");
- return 0;
- }
- /* A helper for print_variant_clauses that prints the members of
- VAR_TYPE. DISCR_TYPE is the type of the discriminant (or nullptr
- if not available). The discriminant is contained in OUTER_TYPE.
- STREAM, LEVEL, SHOW, and FLAGS are the same as for
- ada_print_type. */
- static void
- print_variant_clauses (struct type *var_type, struct type *discr_type,
- struct type *outer_type, struct ui_file *stream,
- int show, int level,
- const struct type_print_options *flags)
- {
- for (int i = 0; i < var_type->num_fields (); i += 1)
- {
- gdb_printf (stream, "\n%*swhen ", level, "");
- if (print_choices (var_type, i, stream, discr_type))
- {
- if (print_record_field_types (var_type->field (i).type (),
- outer_type, stream, show, level,
- flags)
- <= 0)
- gdb_printf (stream, " null;");
- }
- else
- print_selected_record_field_types (var_type, outer_type, i, i,
- stream, show, level, flags);
- }
- }
- /* Assuming that field FIELD_NUM of TYPE represents variants whose
- discriminant is contained in OUTER_TYPE, print its components on STREAM.
- LEVEL is the recursion (indentation) level, in case any of the fields
- themselves have nested structure, and SHOW is the number of levels of
- internal structure to show (see ada_print_type). For this purpose,
- fields nested in a variant part are taken to be at the same level as
- the fields immediately outside the variant part. */
- static void
- print_variant_clauses (struct type *type, int field_num,
- struct type *outer_type, struct ui_file *stream,
- int show, int level,
- const struct type_print_options *flags)
- {
- struct type *var_type, *par_type;
- struct type *discr_type;
- var_type = type->field (field_num).type ();
- discr_type = ada_variant_discrim_type (var_type, outer_type);
- if (var_type->code () == TYPE_CODE_PTR)
- {
- var_type = TYPE_TARGET_TYPE (var_type);
- if (var_type == NULL || var_type->code () != TYPE_CODE_UNION)
- return;
- }
- par_type = ada_find_parallel_type (var_type, "___XVU");
- if (par_type != NULL)
- var_type = par_type;
- print_variant_clauses (var_type, discr_type, outer_type, stream, show,
- level + 4, flags);
- }
- /* Assuming that field FIELD_NUM of TYPE is a variant part whose
- discriminants are contained in OUTER_TYPE, print a description of it
- on STREAM. LEVEL is the recursion (indentation) level, in case any of
- the fields themselves have nested structure, and SHOW is the number of
- levels of internal structure to show (see ada_print_type). For this
- purpose, fields nested in a variant part are taken to be at the same
- level as the fields immediately outside the variant part. */
- static void
- print_variant_part (struct type *type, int field_num, struct type *outer_type,
- struct ui_file *stream, int show, int level,
- const struct type_print_options *flags)
- {
- const char *variant
- = ada_variant_discrim_name (type->field (field_num).type ());
- if (*variant == '\0')
- variant = "?";
- gdb_printf (stream, "\n%*scase %s is", level + 4, "", variant);
- print_variant_clauses (type, field_num, outer_type, stream, show,
- level + 4, flags);
- gdb_printf (stream, "\n%*send case;", level + 4, "");
- }
- /* Print a description on STREAM of the fields FLD0 through FLD1 in
- record or union type TYPE, whose discriminants are in OUTER_TYPE.
- LEVEL is the recursion (indentation) level, in case any of the
- fields themselves have nested structure, and SHOW is the number of
- levels of internal structure to show (see ada_print_type). Does
- not print parent type information of TYPE. Returns 0 if no fields
- printed, -1 for an incomplete type, else > 0. Prints each field
- beginning on a new line, but does not put a new line at end. */
- static int
- print_selected_record_field_types (struct type *type, struct type *outer_type,
- int fld0, int fld1,
- struct ui_file *stream, int show, int level,
- const struct type_print_options *flags)
- {
- int i, flds;
- flds = 0;
- if (fld0 > fld1 && type->is_stub ())
- return -1;
- for (i = fld0; i <= fld1; i += 1)
- {
- QUIT;
- if (ada_is_parent_field (type, i) || ada_is_ignored_field (type, i))
- ;
- else if (ada_is_wrapper_field (type, i))
- flds += print_record_field_types (type->field (i).type (), type,
- stream, show, level, flags);
- else if (ada_is_variant_part (type, i))
- {
- print_variant_part (type, i, outer_type, stream, show, level, flags);
- flds = 1;
- }
- else
- {
- flds += 1;
- gdb_printf (stream, "\n%*s", level + 4, "");
- ada_print_type (type->field (i).type (),
- type->field (i).name (),
- stream, show - 1, level + 4, flags);
- gdb_printf (stream, ";");
- }
- }
- return flds;
- }
- static void print_record_field_types_dynamic
- (const gdb::array_view<variant_part> &parts,
- int from, int to, struct type *type, struct ui_file *stream,
- int show, int level, const struct type_print_options *flags);
- /* Print the choices encoded by VARIANT on STREAM. LEVEL is the
- indentation level. The type of the discriminant for VARIANT is
- given by DISR_TYPE. */
- static void
- print_choices (struct type *discr_type, const variant &variant,
- struct ui_file *stream, int level)
- {
- gdb_printf (stream, "\n%*swhen ", level, "");
- if (variant.is_default ())
- gdb_printf (stream, "others");
- else
- {
- bool first = true;
- for (const discriminant_range &range : variant.discriminants)
- {
- if (!first)
- gdb_printf (stream, " | ");
- first = false;
- ada_print_scalar (discr_type, range.low, stream);
- if (range.low != range.high)
- ada_print_scalar (discr_type, range.high, stream);
- }
- }
- gdb_printf (stream, " =>");
- }
- /* Print a single variant part, PART, on STREAM. TYPE is the
- enclosing type. SHOW, LEVEL, and FLAGS are the usual type-printing
- settings. This prints information about PART and the fields it
- controls. It returns the index of the next field that should be
- shown -- that is, one after the last field printed by this
- call. */
- static int
- print_variant_part (const variant_part &part,
- struct type *type, struct ui_file *stream,
- int show, int level,
- const struct type_print_options *flags)
- {
- struct type *discr_type = nullptr;
- const char *name;
- if (part.discriminant_index == -1)
- name = "?";
- else
- {
- name = type->field (part.discriminant_index).name ();;
- discr_type = type->field (part.discriminant_index).type ();
- }
- gdb_printf (stream, "\n%*scase %s is", level + 4, "", name);
- int last_field = -1;
- for (const variant &variant : part.variants)
- {
- print_choices (discr_type, variant, stream, level + 8);
- if (variant.first_field == variant.last_field)
- gdb_printf (stream, " null;");
- else
- {
- print_record_field_types_dynamic (variant.parts,
- variant.first_field,
- variant.last_field, type, stream,
- show, level + 8, flags);
- last_field = variant.last_field;
- }
- }
- gdb_printf (stream, "\n%*send case;", level + 4, "");
- return last_field;
- }
- /* Print some fields of TYPE to STREAM. SHOW, LEVEL, and FLAGS are
- the usual type-printing settings. PARTS is the array of variant
- parts that correspond to the range of fields to be printed. FROM
- and TO are the range of fields to print. */
- static void
- print_record_field_types_dynamic (const gdb::array_view<variant_part> &parts,
- int from, int to,
- struct type *type, struct ui_file *stream,
- int show, int level,
- const struct type_print_options *flags)
- {
- int field = from;
- for (const variant_part &part : parts)
- {
- if (part.variants.empty ())
- continue;
- /* Print any non-varying fields. */
- int first_varying = part.variants[0].first_field;
- print_selected_record_field_types (type, type, field,
- first_varying - 1, stream,
- show, level, flags);
- field = print_variant_part (part, type, stream, show, level, flags);
- }
- /* Print any trailing fields that we were asked to print. */
- print_selected_record_field_types (type, type, field, to - 1, stream, show,
- level, flags);
- }
- /* Print a description on STREAM of all fields of record or union type
- TYPE, as for print_selected_record_field_types, above. */
- static int
- print_record_field_types (struct type *type, struct type *outer_type,
- struct ui_file *stream, int show, int level,
- const struct type_print_options *flags)
- {
- struct dynamic_prop *prop = type->dyn_prop (DYN_PROP_VARIANT_PARTS);
- if (prop != nullptr)
- {
- if (prop->kind () == PROP_TYPE)
- {
- type = prop->original_type ();
- prop = type->dyn_prop (DYN_PROP_VARIANT_PARTS);
- }
- gdb_assert (prop->kind () == PROP_VARIANT_PARTS);
- print_record_field_types_dynamic (*prop->variant_parts (),
- 0, type->num_fields (),
- type, stream, show, level, flags);
- return type->num_fields ();
- }
- return print_selected_record_field_types (type, outer_type,
- 0, type->num_fields () - 1,
- stream, show, level, flags);
- }
-
- /* Print record type TYPE on STREAM. LEVEL is the recursion (indentation)
- level, in case the element type itself has nested structure, and SHOW is
- the number of levels of internal structure to show (see ada_print_type). */
- static void
- print_record_type (struct type *type0, struct ui_file *stream, int show,
- int level, const struct type_print_options *flags)
- {
- struct type *parent_type;
- struct type *type;
- type = ada_find_parallel_type (type0, "___XVE");
- if (type == NULL)
- type = type0;
- parent_type = ada_parent_type (type);
- if (ada_type_name (parent_type) != NULL)
- {
- const char *parent_name = decoded_type_name (parent_type);
- /* If we fail to decode the parent type name, then use the parent
- type name as is. Not pretty, but should never happen except
- when the debugging info is incomplete or incorrect. This
- prevents a crash trying to print a NULL pointer. */
- if (parent_name == NULL)
- parent_name = ada_type_name (parent_type);
- gdb_printf (stream, "new %s with record", parent_name);
- }
- else if (parent_type == NULL && ada_is_tagged_type (type, 0))
- gdb_printf (stream, "tagged record");
- else
- gdb_printf (stream, "record");
- if (show < 0)
- gdb_printf (stream, " ... end record");
- else
- {
- int flds;
- flds = 0;
- if (parent_type != NULL && ada_type_name (parent_type) == NULL)
- flds += print_record_field_types (parent_type, parent_type,
- stream, show, level, flags);
- flds += print_record_field_types (type, type, stream, show, level,
- flags);
- if (flds > 0)
- gdb_printf (stream, "\n%*send record", level, "");
- else if (flds < 0)
- gdb_printf (stream, _(" <incomplete type> end record"));
- else
- gdb_printf (stream, " null; end record");
- }
- }
- /* Print the unchecked union type TYPE in something resembling Ada
- format on STREAM. LEVEL is the recursion (indentation) level
- in case the element type itself has nested structure, and SHOW is the
- number of levels of internal structure to show (see ada_print_type). */
- static void
- print_unchecked_union_type (struct type *type, struct ui_file *stream,
- int show, int level,
- const struct type_print_options *flags)
- {
- if (show < 0)
- gdb_printf (stream, "record (?) is ... end record");
- else if (type->num_fields () == 0)
- gdb_printf (stream, "record (?) is null; end record");
- else
- {
- gdb_printf (stream, "record (?) is\n%*scase ? is", level + 4, "");
- print_variant_clauses (type, nullptr, type, stream, show, level + 8, flags);
- gdb_printf (stream, "\n%*send case;\n%*send record",
- level + 4, "", level, "");
- }
- }
- /* Print function or procedure type TYPE on STREAM. Make it a header
- for function or procedure NAME if NAME is not null. */
- static void
- print_func_type (struct type *type, struct ui_file *stream, const char *name,
- const struct type_print_options *flags)
- {
- int i, len = type->num_fields ();
- if (TYPE_TARGET_TYPE (type) != NULL
- && TYPE_TARGET_TYPE (type)->code () == TYPE_CODE_VOID)
- gdb_printf (stream, "procedure");
- else
- gdb_printf (stream, "function");
- if (name != NULL && name[0] != '\0')
- {
- gdb_puts (" ", stream);
- fputs_styled (name, function_name_style.style (), stream);
- }
- if (len > 0)
- {
- gdb_printf (stream, " (");
- for (i = 0; i < len; i += 1)
- {
- if (i > 0)
- {
- gdb_puts ("; ", stream);
- stream->wrap_here (4);
- }
- gdb_printf (stream, "a%d: ", i + 1);
- ada_print_type (type->field (i).type (), "", stream, -1, 0,
- flags);
- }
- gdb_printf (stream, ")");
- }
- if (TYPE_TARGET_TYPE (type) == NULL)
- gdb_printf (stream, " return <unknown return type>");
- else if (TYPE_TARGET_TYPE (type)->code () != TYPE_CODE_VOID)
- {
- gdb_printf (stream, " return ");
- ada_print_type (TYPE_TARGET_TYPE (type), "", stream, 0, 0, flags);
- }
- }
- /* Print a description of a type TYPE0.
- Output goes to STREAM (via stdio).
- If VARSTRING is a non-empty string, print as an Ada variable/field
- declaration.
- SHOW+1 is the maximum number of levels of internal type structure
- to show (this applies to record types, enumerated types, and
- array types).
- SHOW is the number of levels of internal type structure to show
- when there is a type name for the SHOWth deepest level (0th is
- outer level).
- When SHOW<0, no inner structure is shown.
- LEVEL indicates level of recursion (for nested definitions). */
- void
- ada_print_type (struct type *type0, const char *varstring,
- struct ui_file *stream, int show, int level,
- const struct type_print_options *flags)
- {
- struct type *type = ada_check_typedef (ada_get_base_type (type0));
- /* If we can decode the original type name, use it. However, there
- are cases where the original type is an internally-generated type
- with a name that can't be decoded (and whose encoded name might
- not actually bear any relation to the type actually declared in
- the sources). In that case, try using the name of the base type
- in its place.
- Note that we looked at the possibility of always using the name
- of the base type. This does not always work, unfortunately, as
- there are situations where it's the base type which has an
- internally-generated name. */
- const char *type_name = decoded_type_name (type0);
- if (type_name == nullptr)
- type_name = decoded_type_name (type);
- int is_var_decl = (varstring != NULL && varstring[0] != '\0');
- if (type == NULL)
- {
- if (is_var_decl)
- gdb_printf (stream, "%.*s: ",
- ada_name_prefix_len (varstring), varstring);
- fprintf_styled (stream, metadata_style.style (), "<null type?>");
- return;
- }
- if (is_var_decl && type->code () != TYPE_CODE_FUNC)
- gdb_printf (stream, "%.*s: ",
- ada_name_prefix_len (varstring), varstring);
- if (type_name != NULL && show <= 0 && !ada_is_aligner_type (type))
- {
- gdb_printf (stream, "%.*s",
- ada_name_prefix_len (type_name), type_name);
- return;
- }
- if (ada_is_aligner_type (type))
- ada_print_type (ada_aligned_type (type), "", stream, show, level, flags);
- else if (ada_is_constrained_packed_array_type (type)
- && type->code () != TYPE_CODE_PTR)
- print_array_type (type, stream, show, level, flags);
- else
- switch (type->code ())
- {
- default:
- gdb_printf (stream, "<");
- c_print_type (type, "", stream, show, level, flags);
- gdb_printf (stream, ">");
- break;
- case TYPE_CODE_PTR:
- case TYPE_CODE_TYPEDEF:
- /* An __XVL field is not truly a pointer, so don't print
- "access" in this case. */
- if (type->code () != TYPE_CODE_PTR
- || strstr (varstring, "___XVL") == nullptr)
- gdb_printf (stream, "access ");
- ada_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level,
- flags);
- break;
- case TYPE_CODE_REF:
- gdb_printf (stream, "<ref> ");
- ada_print_type (TYPE_TARGET_TYPE (type), "", stream, show, level,
- flags);
- break;
- case TYPE_CODE_ARRAY:
- print_array_type (type, stream, show, level, flags);
- break;
- case TYPE_CODE_BOOL:
- gdb_printf (stream, "(false, true)");
- break;
- case TYPE_CODE_INT:
- {
- const char *name = ada_type_name (type);
- if (!ada_is_range_type_name (name))
- fprintf_styled (stream, metadata_style.style (),
- _("<%s-byte integer>"),
- pulongest (TYPE_LENGTH (type)));
- else
- {
- gdb_printf (stream, "range ");
- print_range_type (type, stream, 1 /* bounds_prefered_p */);
- }
- }
- break;
- case TYPE_CODE_RANGE:
- if (is_fixed_point_type (type))
- {
- gdb_printf (stream, "<");
- print_type_fixed_point (type, stream);
- gdb_printf (stream, ">");
- }
- else if (ada_is_modular_type (type))
- gdb_printf (stream, "mod %s",
- int_string (ada_modulus (type), 10, 0, 0, 1));
- else
- {
- gdb_printf (stream, "range ");
- print_range (type, stream, 1 /* bounds_prefered_p */);
- }
- break;
- case TYPE_CODE_FLT:
- fprintf_styled (stream, metadata_style.style (),
- _("<%s-byte float>"),
- pulongest (TYPE_LENGTH (type)));
- break;
- case TYPE_CODE_ENUM:
- if (show < 0)
- gdb_printf (stream, "(...)");
- else
- print_enum_type (type, stream);
- break;
- case TYPE_CODE_STRUCT:
- if (ada_is_array_descriptor_type (type))
- print_array_type (type, stream, show, level, flags);
- else if (ada_is_bogus_array_descriptor (type))
- gdb_printf (stream,
- _("array (?) of ? (<mal-formed descriptor>)"));
- else
- print_record_type (type, stream, show, level, flags);
- break;
- case TYPE_CODE_UNION:
- print_unchecked_union_type (type, stream, show, level, flags);
- break;
- case TYPE_CODE_FUNC:
- print_func_type (type, stream, varstring, flags);
- break;
- }
- }
- /* Implement the la_print_typedef language method for Ada. */
- void
- ada_print_typedef (struct type *type, struct symbol *new_symbol,
- struct ui_file *stream)
- {
- type = ada_check_typedef (type);
- ada_print_type (type, "", stream, 0, 0, &type_print_raw_options);
- }
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