mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-27 03:51:15 +08:00
1d506c26d9
This commit is the result of the following actions:
- Running gdb/copyright.py to update all of the copyright headers to
include 2024,
- Manually updating a few files the copyright.py script told me to
update, these files had copyright headers embedded within the
file,
- Regenerating gdbsupport/Makefile.in to refresh it's copyright
date,
- Using grep to find other files that still mentioned 2023. If
these files were updated last year from 2022 to 2023 then I've
updated them this year to 2024.
I'm sure I've probably missed some dates. Feel free to fix them up as
you spot them.
472 lines
12 KiB
C
472 lines
12 KiB
C
/* Support for printing Modula 2 values for GDB, the GNU debugger.
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Copyright (C) 1986-2024 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 "symtab.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 "typeprint.h"
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#include "c-lang.h"
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#include "m2-lang.h"
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#include "target.h"
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#include "cli/cli-style.h"
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static int print_unpacked_pointer (struct type *type,
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CORE_ADDR address, CORE_ADDR addr,
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const struct value_print_options *options,
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struct ui_file *stream);
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static void
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m2_print_array_contents (struct value *val,
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struct ui_file *stream, int recurse,
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const struct value_print_options *options,
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int len);
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/* get_long_set_bounds - assigns the bounds of the long set to low and
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high. */
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int
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get_long_set_bounds (struct type *type, LONGEST *low, LONGEST *high)
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{
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int len, i;
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if (type->code () == TYPE_CODE_STRUCT)
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{
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len = type->num_fields ();
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i = TYPE_N_BASECLASSES (type);
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if (len == 0)
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return 0;
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*low = type->field (i).type ()->bounds ()->low.const_val ();
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*high = type->field (len - 1).type ()->bounds ()->high.const_val ();
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return 1;
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}
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error (_("expecting long_set"));
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return 0;
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}
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static void
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m2_print_long_set (struct type *type, const gdb_byte *valaddr,
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int embedded_offset, CORE_ADDR address,
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struct ui_file *stream)
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{
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int empty_set = 1;
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int element_seen = 0;
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LONGEST previous_low = 0;
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LONGEST previous_high= 0;
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LONGEST i, low_bound, high_bound;
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LONGEST field_low, field_high;
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struct type *range;
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int len, field;
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struct type *target;
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int bitval;
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type = check_typedef (type);
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gdb_printf (stream, "{");
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len = type->num_fields ();
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if (get_long_set_bounds (type, &low_bound, &high_bound))
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{
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field = TYPE_N_BASECLASSES (type);
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range = type->field (field).type ()->index_type ();
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}
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else
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{
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fprintf_styled (stream, metadata_style.style (),
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" %s }", _("<unknown bounds of set>"));
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return;
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}
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target = range->target_type ();
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if (get_discrete_bounds (range, &field_low, &field_high))
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{
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for (i = low_bound; i <= high_bound; i++)
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{
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bitval = value_bit_index (type->field (field).type (),
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(type->field (field).loc_bitpos () / 8) +
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valaddr + embedded_offset, i);
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if (bitval < 0)
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error (_("bit test is out of range"));
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else if (bitval > 0)
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{
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previous_high = i;
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if (! element_seen)
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{
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if (! empty_set)
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gdb_printf (stream, ", ");
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print_type_scalar (target, i, stream);
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empty_set = 0;
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element_seen = 1;
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previous_low = i;
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}
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}
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else
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{
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/* bit is not set */
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if (element_seen)
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{
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if (previous_low+1 < previous_high)
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gdb_printf (stream, "..");
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if (previous_low+1 < previous_high)
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print_type_scalar (target, previous_high, stream);
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element_seen = 0;
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}
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}
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if (i == field_high)
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{
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field++;
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if (field == len)
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break;
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range = type->field (field).type ()->index_type ();
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if (!get_discrete_bounds (range, &field_low, &field_high))
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break;
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target = range->target_type ();
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}
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}
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if (element_seen)
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{
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if (previous_low+1 < previous_high)
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{
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gdb_printf (stream, "..");
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print_type_scalar (target, previous_high, stream);
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}
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element_seen = 0;
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}
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gdb_printf (stream, "}");
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}
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}
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static void
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m2_print_unbounded_array (struct value *value,
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struct ui_file *stream, int recurse,
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const struct value_print_options *options)
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{
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CORE_ADDR addr;
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LONGEST len;
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struct value *val;
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struct type *type = check_typedef (value->type ());
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const gdb_byte *valaddr = value->contents_for_printing ().data ();
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addr = unpack_pointer (type->field (0).type (),
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(type->field (0).loc_bitpos () / 8) +
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valaddr);
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val = value_at_lazy (type->field (0).type ()->target_type (),
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addr);
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len = unpack_field_as_long (type, valaddr, 1);
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gdb_printf (stream, "{");
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m2_print_array_contents (val, stream, recurse, options, len);
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gdb_printf (stream, ", HIGH = %d}", (int) len);
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}
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static int
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print_unpacked_pointer (struct type *type,
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CORE_ADDR address, CORE_ADDR addr,
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const struct value_print_options *options,
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struct ui_file *stream)
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{
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struct gdbarch *gdbarch = type->arch ();
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struct type *elttype = check_typedef (type->target_type ());
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int want_space = 0;
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if (elttype->code () == TYPE_CODE_FUNC)
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{
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/* Try to print what function it points to. */
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print_function_pointer_address (options, gdbarch, addr, stream);
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/* Return value is irrelevant except for string pointers. */
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return 0;
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}
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if (options->addressprint && options->format != 's')
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{
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gdb_puts (paddress (gdbarch, address), stream);
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want_space = 1;
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}
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/* For a pointer to char or unsigned char, also print the string
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pointed to, unless pointer is null. */
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if (elttype->length () == 1
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&& elttype->code () == TYPE_CODE_INT
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&& (options->format == 0 || options->format == 's')
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&& addr != 0)
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{
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if (want_space)
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gdb_puts (" ", stream);
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return val_print_string (type->target_type (), NULL, addr, -1,
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stream, options);
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}
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return 0;
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}
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static void
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print_variable_at_address (struct type *type,
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const gdb_byte *valaddr,
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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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struct gdbarch *gdbarch = type->arch ();
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CORE_ADDR addr = unpack_pointer (type, valaddr);
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struct type *elttype = check_typedef (type->target_type ());
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gdb_printf (stream, "[");
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gdb_puts (paddress (gdbarch, addr), stream);
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gdb_printf (stream, "] : ");
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if (elttype->code () != TYPE_CODE_UNDEF)
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{
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struct value *deref_val =
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value_at (type->target_type (), unpack_pointer (type, valaddr));
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common_val_print (deref_val, stream, recurse, options, current_language);
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}
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else
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gdb_puts ("???", stream);
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}
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/* m2_print_array_contents - prints out the contents of an
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array up to a max_print values.
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It prints arrays of char as a string
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and all other data types as comma
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separated values. */
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static void
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m2_print_array_contents (struct value *val,
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struct ui_file *stream, int recurse,
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const struct value_print_options *options,
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int len)
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{
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struct type *type = check_typedef (val->type ());
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if (type->length () > 0)
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{
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/* For an array of chars, print with string syntax. */
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if (type->length () == 1 &&
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((type->code () == TYPE_CODE_INT)
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|| ((current_language->la_language == language_m2)
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&& (type->code () == TYPE_CODE_CHAR)))
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&& (options->format == 0 || options->format == 's'))
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val_print_string (type, NULL, val->address (), len+1, stream,
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options);
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else
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{
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gdb_printf (stream, "{");
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value_print_array_elements (val, stream, recurse, options, 0);
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gdb_printf (stream, "}");
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}
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}
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}
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/* Decorations for Modula 2. */
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static const struct generic_val_print_decorations m2_decorations =
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{
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"",
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" + ",
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" * I",
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"TRUE",
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"FALSE",
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"void",
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"{",
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"}"
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};
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/* See m2-lang.h. */
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void
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m2_language::value_print_inner (struct value *val, struct ui_file *stream,
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int recurse,
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const struct value_print_options *options) const
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{
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unsigned len;
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struct type *elttype;
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CORE_ADDR addr;
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const gdb_byte *valaddr = val->contents_for_printing ().data ();
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const CORE_ADDR address = val->address ();
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struct type *type = check_typedef (val->type ());
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switch (type->code ())
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{
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case TYPE_CODE_ARRAY:
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if (type->length () > 0 && type->target_type ()->length () > 0)
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{
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elttype = check_typedef (type->target_type ());
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len = type->length () / elttype->length ();
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/* For an array of chars, print with string syntax. */
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if (elttype->length () == 1 &&
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((elttype->code () == TYPE_CODE_INT)
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|| ((current_language->la_language == language_m2)
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&& (elttype->code () == TYPE_CODE_CHAR)))
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&& (options->format == 0 || options->format == 's'))
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{
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/* If requested, look for the first null char and only print
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elements up to it. */
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if (options->stop_print_at_null)
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{
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unsigned int print_max_chars = get_print_max_chars (options);
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unsigned int temp_len;
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/* Look for a NULL char. */
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for (temp_len = 0;
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(valaddr[temp_len]
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&& temp_len < len
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&& temp_len < print_max_chars);
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temp_len++);
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len = temp_len;
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}
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printstr (stream, type->target_type (), valaddr, len,
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NULL, 0, options);
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}
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else
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{
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gdb_printf (stream, "{");
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value_print_array_elements (val, stream, recurse,
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options, 0);
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gdb_printf (stream, "}");
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}
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break;
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}
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/* Array of unspecified length: treat like pointer to first elt. */
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print_unpacked_pointer (type, address, address, options, stream);
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break;
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case TYPE_CODE_PTR:
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if (TYPE_CONST (type))
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print_variable_at_address (type, valaddr, stream, recurse, options);
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else if (options->format && options->format != 's')
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value_print_scalar_formatted (val, options, 0, stream);
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else
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{
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addr = unpack_pointer (type, valaddr);
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print_unpacked_pointer (type, addr, address, options, stream);
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}
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break;
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case TYPE_CODE_UNION:
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if (recurse && !options->unionprint)
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{
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gdb_printf (stream, "{...}");
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break;
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}
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[[fallthrough]];
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case TYPE_CODE_STRUCT:
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if (m2_is_long_set (type))
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m2_print_long_set (type, valaddr, 0, address, stream);
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else if (m2_is_unbounded_array (type))
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m2_print_unbounded_array (val, stream, recurse, options);
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else
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cp_print_value_fields (val, stream, recurse, options, NULL, 0);
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break;
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case TYPE_CODE_SET:
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elttype = type->index_type ();
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elttype = check_typedef (elttype);
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if (elttype->is_stub ())
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{
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fprintf_styled (stream, metadata_style.style (),
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_("<incomplete type>"));
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break;
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}
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else
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{
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struct type *range = elttype;
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LONGEST low_bound, high_bound;
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int i;
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int need_comma = 0;
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gdb_puts ("{", stream);
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i = get_discrete_bounds (range, &low_bound, &high_bound) ? 0 : -1;
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maybe_bad_bstring:
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if (i < 0)
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{
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fputs_styled (_("<error value>"), metadata_style.style (),
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stream);
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goto done;
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}
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for (i = low_bound; i <= high_bound; i++)
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{
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int element = value_bit_index (type, valaddr, i);
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if (element < 0)
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{
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i = element;
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goto maybe_bad_bstring;
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}
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if (element)
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{
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if (need_comma)
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gdb_puts (", ", stream);
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print_type_scalar (range, i, stream);
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need_comma = 1;
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if (i + 1 <= high_bound
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&& value_bit_index (type, valaddr, ++i))
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{
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int j = i;
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gdb_puts ("..", stream);
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while (i + 1 <= high_bound
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&& value_bit_index (type, valaddr, ++i))
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j = i;
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print_type_scalar (range, j, stream);
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}
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}
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}
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done:
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gdb_puts ("}", stream);
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}
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break;
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case TYPE_CODE_RANGE:
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if (type->length () == type->target_type ()->length ())
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{
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struct value *v = value_cast (type->target_type (), val);
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value_print_inner (v, stream, recurse, options);
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break;
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}
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[[fallthrough]];
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case TYPE_CODE_REF:
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case TYPE_CODE_ENUM:
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case TYPE_CODE_FUNC:
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case TYPE_CODE_INT:
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case TYPE_CODE_FLT:
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case TYPE_CODE_METHOD:
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case TYPE_CODE_VOID:
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case TYPE_CODE_ERROR:
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case TYPE_CODE_UNDEF:
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case TYPE_CODE_BOOL:
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case TYPE_CODE_CHAR:
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default:
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generic_value_print (val, stream, recurse, options, &m2_decorations);
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break;
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}
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}
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