580 lines
16 KiB
C
580 lines
16 KiB
C
/* Support for printing Modula 2 values for GDB, the GNU debugger.
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Copyright (C) 1986, 1988, 1989, 1991, 1992, 1996, 1998, 2000, 2005, 2006,
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2007 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 2 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, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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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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int print_unpacked_pointer (struct type *type,
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CORE_ADDR address, CORE_ADDR addr,
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int format, struct ui_file *stream);
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/* Print function pointer with inferior address ADDRESS onto stdio
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stream STREAM. */
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static void
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print_function_pointer_address (CORE_ADDR address, struct ui_file *stream)
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{
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CORE_ADDR func_addr = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
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address,
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¤t_target);
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/* If the function pointer is represented by a description, print the
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address of the description. */
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if (addressprint && func_addr != address)
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{
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fputs_filtered ("@", stream);
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fputs_filtered (paddress (address), stream);
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fputs_filtered (": ", stream);
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}
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print_address_demangle (func_addr, stream, demangle);
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}
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/*
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* get_long_set_bounds - assigns the bounds of the long set to low and high.
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*/
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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) == TYPE_CODE_STRUCT)
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{
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len = TYPE_NFIELDS (type);
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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_LOW_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type, i)));
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*high = TYPE_HIGH_BOUND (TYPE_INDEX_TYPE (TYPE_FIELD_TYPE (type,
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len-1)));
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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, int format,
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enum val_prettyprint pretty)
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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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CHECK_TYPEDEF (type);
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fprintf_filtered (stream, "{");
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len = TYPE_NFIELDS (type);
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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_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
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}
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else
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{
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fprintf_filtered (stream, " %s }", _("<unknown bounds of set>"));
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return;
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}
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target = TYPE_TARGET_TYPE (range);
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if (target == NULL)
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target = builtin_type_int;
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if (get_discrete_bounds (range, &field_low, &field_high) >= 0)
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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_TYPE (type, field),
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(TYPE_FIELD_BITPOS (type, field) / 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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fprintf_filtered (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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fprintf_filtered (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_INDEX_TYPE (TYPE_FIELD_TYPE (type, field));
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if (get_discrete_bounds (range, &field_low, &field_high) < 0)
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break;
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target = TYPE_TARGET_TYPE (range);
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if (target == NULL)
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target = builtin_type_int;
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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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fprintf_filtered (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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fprintf_filtered (stream, "}");
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}
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}
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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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int format, struct ui_file *stream)
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{
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struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
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if (TYPE_CODE (elttype) == 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 (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 (addressprint && format != 's')
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fputs_filtered (paddress (address), stream);
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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 (TYPE_LENGTH (elttype) == 1
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&& TYPE_CODE (elttype) == TYPE_CODE_INT
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&& (format == 0 || format == 's')
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&& addr != 0)
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return val_print_string (addr, -1, TYPE_LENGTH (elttype), stream);
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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, const gdb_byte *valaddr,
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struct ui_file *stream, int format,
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int deref_ref, int recurse,
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enum val_prettyprint pretty)
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{
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CORE_ADDR addr = unpack_pointer (type, valaddr);
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struct type *elttype = check_typedef (TYPE_TARGET_TYPE (type));
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fprintf_filtered (stream, "[");
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fputs_filtered (paddress (addr), stream);
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fprintf_filtered (stream, "] : ");
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if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
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{
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struct value *deref_val =
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value_at
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(TYPE_TARGET_TYPE (type),
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unpack_pointer (lookup_pointer_type (builtin_type_void),
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valaddr));
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common_val_print (deref_val, stream, format, deref_ref,
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recurse, pretty);
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}
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else
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fputs_filtered ("???", stream);
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}
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/* Print data of type TYPE located at VALADDR (within GDB), which came from
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the inferior at address ADDRESS, onto stdio stream STREAM according to
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FORMAT (a letter or 0 for natural format). The data at VALADDR is in
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target byte order.
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If the data are a string pointer, returns the number of string characters
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printed.
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If DEREF_REF is nonzero, then dereference references, otherwise just print
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them like pointers.
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The PRETTY parameter controls prettyprinting. */
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int
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m2_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
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CORE_ADDR address, struct ui_file *stream, int format,
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int deref_ref, int recurse, enum val_prettyprint pretty)
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{
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unsigned int i = 0; /* Number of characters printed */
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unsigned len;
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struct type *elttype;
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unsigned eltlen;
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int length_pos, length_size, string_pos;
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int char_size;
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LONGEST val;
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CORE_ADDR addr;
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CHECK_TYPEDEF (type);
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switch (TYPE_CODE (type))
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{
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case TYPE_CODE_ARRAY:
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if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
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{
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elttype = check_typedef (TYPE_TARGET_TYPE (type));
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eltlen = TYPE_LENGTH (elttype);
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len = TYPE_LENGTH (type) / eltlen;
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if (prettyprint_arrays)
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print_spaces_filtered (2 + 2 * recurse, stream);
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/* For an array of chars, print with string syntax. */
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if (eltlen == 1 &&
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((TYPE_CODE (elttype) == TYPE_CODE_INT)
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|| ((current_language->la_language == language_m2)
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&& (TYPE_CODE (elttype) == TYPE_CODE_CHAR)))
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&& (format == 0 || 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 (stop_print_at_null)
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{
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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 + embedded_offset)[temp_len]
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&& temp_len < len && temp_len < print_max;
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temp_len++);
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len = temp_len;
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}
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LA_PRINT_STRING (stream, valaddr + embedded_offset, len, 1, 0);
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i = len;
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}
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else
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{
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fprintf_filtered (stream, "{");
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val_print_array_elements (type, valaddr + embedded_offset,
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address, stream, format, deref_ref,
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recurse, pretty, 0);
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fprintf_filtered (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, format, 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 + embedded_offset,
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stream, format, deref_ref, recurse,
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pretty);
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else if (format && format != 's')
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print_scalar_formatted (valaddr + embedded_offset, type, format,
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0, stream);
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else
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{
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addr = unpack_pointer (type, valaddr + embedded_offset);
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print_unpacked_pointer (type, addr, address, format, stream);
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}
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break;
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case TYPE_CODE_REF:
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elttype = check_typedef (TYPE_TARGET_TYPE (type));
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if (addressprint)
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{
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CORE_ADDR addr
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= extract_typed_address (valaddr + embedded_offset, type);
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fprintf_filtered (stream, "@");
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fputs_filtered (paddress (addr), stream);
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if (deref_ref)
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fputs_filtered (": ", stream);
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}
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/* De-reference the reference. */
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if (deref_ref)
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{
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if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
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{
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struct value *deref_val =
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value_at
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(TYPE_TARGET_TYPE (type),
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unpack_pointer (lookup_pointer_type (builtin_type_void),
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valaddr + embedded_offset));
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common_val_print (deref_val, stream, format, deref_ref,
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recurse, pretty);
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}
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else
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fputs_filtered ("???", stream);
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}
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break;
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case TYPE_CODE_UNION:
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if (recurse && !unionprint)
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{
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fprintf_filtered (stream, "{...}");
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break;
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}
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/* Fall through. */
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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, embedded_offset, address,
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stream, format, pretty);
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else
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cp_print_value_fields (type, type, valaddr, embedded_offset,
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address, stream, format,
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recurse, pretty, NULL, 0);
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break;
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case TYPE_CODE_ENUM:
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if (format)
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{
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print_scalar_formatted (valaddr + embedded_offset, type,
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format, 0, stream);
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break;
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}
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len = TYPE_NFIELDS (type);
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val = unpack_long (type, valaddr + embedded_offset);
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for (i = 0; i < len; i++)
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{
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QUIT;
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if (val == TYPE_FIELD_BITPOS (type, i))
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{
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break;
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}
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}
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if (i < len)
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{
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fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
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}
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else
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{
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print_longest (stream, 'd', 0, val);
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}
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break;
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case TYPE_CODE_FUNC:
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if (format)
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{
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print_scalar_formatted (valaddr + embedded_offset, type,
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format, 0, stream);
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break;
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}
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/* FIXME, we should consider, at least for ANSI C language, eliminating
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the distinction made between FUNCs and POINTERs to FUNCs. */
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fprintf_filtered (stream, "{");
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type_print (type, "", stream, -1);
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fprintf_filtered (stream, "} ");
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/* Try to print what function it points to, and its address. */
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print_address_demangle (address, stream, demangle);
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break;
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case TYPE_CODE_BOOL:
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format = format ? format : output_format;
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if (format)
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print_scalar_formatted (valaddr + embedded_offset, type,
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format, 0, stream);
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else
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{
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val = unpack_long (type, valaddr + embedded_offset);
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if (val == 0)
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fputs_filtered ("FALSE", stream);
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else if (val == 1)
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fputs_filtered ("TRUE", stream);
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else
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fprintf_filtered (stream, "%ld)", (long int) val);
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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) == TYPE_LENGTH (TYPE_TARGET_TYPE (type)))
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{
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m2_val_print (TYPE_TARGET_TYPE (type), valaddr, embedded_offset,
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address, stream, format, deref_ref, recurse, pretty);
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break;
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}
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/* FIXME: create_range_type does not set the unsigned bit in a
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range type (I think it probably should copy it from the target
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type), so we won't print values which are too large to
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fit in a signed integer correctly. */
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/* FIXME: Doesn't handle ranges of enums correctly. (Can't just
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print with the target type, though, because the size of our type
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and the target type might differ). */
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/* FALLTHROUGH */
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case TYPE_CODE_INT:
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format = format ? format : output_format;
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if (format)
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print_scalar_formatted (valaddr + embedded_offset, type, format,
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0, stream);
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else
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val_print_type_code_int (type, valaddr + embedded_offset, stream);
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break;
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case TYPE_CODE_CHAR:
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format = format ? format : output_format;
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if (format)
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print_scalar_formatted (valaddr + embedded_offset, type,
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format, 0, stream);
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else
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{
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val = unpack_long (type, valaddr + embedded_offset);
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if (TYPE_UNSIGNED (type))
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fprintf_filtered (stream, "%u", (unsigned int) val);
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else
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fprintf_filtered (stream, "%d", (int) val);
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fputs_filtered (" ", stream);
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LA_PRINT_CHAR ((unsigned char) val, stream);
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}
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break;
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case TYPE_CODE_FLT:
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if (format)
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print_scalar_formatted (valaddr + embedded_offset, type,
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format, 0, stream);
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else
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print_floating (valaddr + embedded_offset, type, stream);
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break;
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case TYPE_CODE_METHOD:
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break;
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case TYPE_CODE_BITSTRING:
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case TYPE_CODE_SET:
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elttype = TYPE_INDEX_TYPE (type);
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CHECK_TYPEDEF (elttype);
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if (TYPE_STUB (elttype))
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{
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fprintf_filtered (stream, _("<incomplete type>"));
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gdb_flush (stream);
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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 is_bitstring = TYPE_CODE (type) == TYPE_CODE_BITSTRING;
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int need_comma = 0;
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if (is_bitstring)
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fputs_filtered ("B'", stream);
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else
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fputs_filtered ("{", stream);
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i = get_discrete_bounds (range, &low_bound, &high_bound);
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maybe_bad_bstring:
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if (i < 0)
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{
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fputs_filtered (_("<error value>"), 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 + embedded_offset,
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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 (is_bitstring)
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fprintf_filtered (stream, "%d", element);
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else if (element)
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{
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if (need_comma)
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fputs_filtered (", ", 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
|
|
&& value_bit_index (type, valaddr + embedded_offset,
|
|
++i))
|
|
{
|
|
int j = i;
|
|
fputs_filtered ("..", stream);
|
|
while (i + 1 <= high_bound
|
|
&& value_bit_index (type,
|
|
valaddr + embedded_offset,
|
|
++i))
|
|
j = i;
|
|
print_type_scalar (range, j, stream);
|
|
}
|
|
}
|
|
}
|
|
done:
|
|
if (is_bitstring)
|
|
fputs_filtered ("'", stream);
|
|
else
|
|
fputs_filtered ("}", stream);
|
|
}
|
|
break;
|
|
|
|
case TYPE_CODE_VOID:
|
|
fprintf_filtered (stream, "void");
|
|
break;
|
|
|
|
case TYPE_CODE_ERROR:
|
|
fprintf_filtered (stream, _("<error type>"));
|
|
break;
|
|
|
|
case TYPE_CODE_UNDEF:
|
|
/* This happens (without TYPE_FLAG_STUB set) on systems which don't use
|
|
dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
|
|
and no complete type for struct foo in that file. */
|
|
fprintf_filtered (stream, _("<incomplete type>"));
|
|
break;
|
|
|
|
default:
|
|
error (_("Invalid m2 type code %d in symbol table."), TYPE_CODE (type));
|
|
}
|
|
gdb_flush (stream);
|
|
return (0);
|
|
}
|