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330 |
jeremybenn |
/* Support for printing C++ values for GDB, the GNU debugger.
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Copyright (C) 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
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2000, 2001, 2002, 2003, 2005, 2006, 2007, 2008, 2009, 2010
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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 "gdb_obstack.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 "command.h"
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#include "gdbcmd.h"
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#include "demangle.h"
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#include "annotate.h"
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#include "gdb_string.h"
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#include "c-lang.h"
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#include "target.h"
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#include "cp-abi.h"
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#include "valprint.h"
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#include "cp-support.h"
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#include "language.h"
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#include "python/python.h"
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/* Controls printing of vtbl's */
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static void
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show_vtblprint (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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{
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fprintf_filtered (file, _("\
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Printing of C++ virtual function tables is %s.\n"),
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value);
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}
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/* Controls looking up an object's derived type using what we find in
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its vtables. */
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static void
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show_objectprint (struct ui_file *file, int from_tty,
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struct cmd_list_element *c,
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const char *value)
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{
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fprintf_filtered (file, _("\
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Printing of object's derived type based on vtable info is %s.\n"),
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value);
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}
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static void
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show_static_field_print (struct ui_file *file, int from_tty,
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struct cmd_list_element *c, const char *value)
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{
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fprintf_filtered (file, _("Printing of C++ static members is %s.\n"),
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value);
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}
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static struct obstack dont_print_vb_obstack;
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static struct obstack dont_print_statmem_obstack;
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static struct obstack dont_print_stat_array_obstack;
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extern void _initialize_cp_valprint (void);
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static void cp_print_static_field (struct type *, struct value *,
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struct ui_file *, int,
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const struct value_print_options *);
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static void cp_print_value (struct type *, struct type *, const gdb_byte *,
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int, CORE_ADDR, struct ui_file *, int,
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const struct value *,
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const struct value_print_options *, struct type **);
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/* GCC versions after 2.4.5 use this. */
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const char vtbl_ptr_name[] = "__vtbl_ptr_type";
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/* Return truth value for assertion that TYPE is of the type
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"pointer to virtual function". */
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int
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cp_is_vtbl_ptr_type (struct type *type)
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{
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char *typename = type_name_no_tag (type);
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return (typename != NULL && !strcmp (typename, vtbl_ptr_name));
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}
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/* Return truth value for the assertion that TYPE is of the type
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"pointer to virtual function table". */
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int
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cp_is_vtbl_member (struct type *type)
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{
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/* With older versions of g++, the vtbl field pointed to an array
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of structures. Nowadays it points directly to the structure. */
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if (TYPE_CODE (type) == TYPE_CODE_PTR)
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{
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type = TYPE_TARGET_TYPE (type);
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if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
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{
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type = TYPE_TARGET_TYPE (type);
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if (TYPE_CODE (type) == TYPE_CODE_STRUCT /* if not using thunks */
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|| TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */
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{
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/* Virtual functions tables are full of pointers
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to virtual functions. */
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return cp_is_vtbl_ptr_type (type);
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}
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}
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else if (TYPE_CODE (type) == TYPE_CODE_STRUCT) /* if not using thunks */
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{
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return cp_is_vtbl_ptr_type (type);
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}
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else if (TYPE_CODE (type) == TYPE_CODE_PTR) /* if using thunks */
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{
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/* The type name of the thunk pointer is NULL when using dwarf2.
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We could test for a pointer to a function, but there is
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no type info for the virtual table either, so it wont help. */
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return cp_is_vtbl_ptr_type (type);
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}
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}
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return 0;
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}
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/* Mutually recursive subroutines of cp_print_value and c_val_print to
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print out a structure's fields: cp_print_value_fields and cp_print_value.
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TYPE, VALADDR, ADDRESS, STREAM, RECURSE, and OPTIONS have the
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same meanings as in cp_print_value and c_val_print.
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2nd argument REAL_TYPE is used to carry over the type of the derived
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class across the recursion to base classes.
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DONT_PRINT is an array of baseclass types that we
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should not print, or zero if called from top level. */
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void
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cp_print_value_fields (struct type *type, struct type *real_type,
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const gdb_byte *valaddr, int offset, CORE_ADDR address,
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struct ui_file *stream, int recurse,
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const struct value *val,
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const struct value_print_options *options,
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struct type **dont_print_vb, int dont_print_statmem)
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{
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int i, len, n_baseclasses;
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int fields_seen = 0;
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static int last_set_recurse = -1;
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CHECK_TYPEDEF (type);
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if (recurse == 0)
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{
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/* Any object can be left on obstacks only during an unexpected error. */
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if (obstack_object_size (&dont_print_statmem_obstack) > 0)
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{
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obstack_free (&dont_print_statmem_obstack, NULL);
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obstack_begin (&dont_print_statmem_obstack, 32 * sizeof (CORE_ADDR));
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}
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if (obstack_object_size (&dont_print_stat_array_obstack) > 0)
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{
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obstack_free (&dont_print_stat_array_obstack, NULL);
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obstack_begin (&dont_print_stat_array_obstack,
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32 * sizeof (struct type *));
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}
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}
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fprintf_filtered (stream, "{");
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len = TYPE_NFIELDS (type);
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n_baseclasses = TYPE_N_BASECLASSES (type);
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/* First, print out baseclasses such that we don't print
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duplicates of virtual baseclasses. */
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if (n_baseclasses > 0)
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cp_print_value (type, real_type, valaddr, offset, address, stream,
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recurse + 1, val, options, dont_print_vb);
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/* Second, print out data fields */
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/* If there are no data fields, skip this part */
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if (len == n_baseclasses || !len)
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fprintf_filtered (stream, "<No data fields>");
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else
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{
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int statmem_obstack_initial_size = 0;
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int stat_array_obstack_initial_size = 0;
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if (dont_print_statmem == 0)
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{
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statmem_obstack_initial_size =
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obstack_object_size (&dont_print_statmem_obstack);
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if (last_set_recurse != recurse)
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{
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stat_array_obstack_initial_size =
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obstack_object_size (&dont_print_stat_array_obstack);
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last_set_recurse = recurse;
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}
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}
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for (i = n_baseclasses; i < len; i++)
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{
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/* If requested, skip printing of static fields. */
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if (!options->static_field_print
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&& field_is_static (&TYPE_FIELD (type, i)))
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continue;
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if (fields_seen)
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fprintf_filtered (stream, ", ");
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else if (n_baseclasses > 0)
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{
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if (options->pretty)
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{
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fprintf_filtered (stream, "\n");
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print_spaces_filtered (2 + 2 * recurse, stream);
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fputs_filtered ("members of ", stream);
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fputs_filtered (type_name_no_tag (type), stream);
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fputs_filtered (": ", stream);
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}
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}
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fields_seen = 1;
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if (options->pretty)
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{
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fprintf_filtered (stream, "\n");
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print_spaces_filtered (2 + 2 * recurse, stream);
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}
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else
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{
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wrap_here (n_spaces (2 + 2 * recurse));
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}
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248 |
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if (options->inspect_it)
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{
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250 |
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if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
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fputs_filtered ("\"( ptr \"", stream);
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else
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fputs_filtered ("\"( nodef \"", stream);
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if (field_is_static (&TYPE_FIELD (type, i)))
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fputs_filtered ("static ", stream);
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fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
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current_language->la_language,
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DMGL_PARAMS | DMGL_ANSI);
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fputs_filtered ("\" \"", stream);
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fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
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current_language->la_language,
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DMGL_PARAMS | DMGL_ANSI);
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fputs_filtered ("\") \"", stream);
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}
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else
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{
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267 |
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annotate_field_begin (TYPE_FIELD_TYPE (type, i));
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268 |
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269 |
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if (field_is_static (&TYPE_FIELD (type, i)))
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fputs_filtered ("static ", stream);
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fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
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current_language->la_language,
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273 |
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DMGL_PARAMS | DMGL_ANSI);
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274 |
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annotate_field_name_end ();
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275 |
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/* do not print leading '=' in case of anonymous unions */
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276 |
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if (strcmp (TYPE_FIELD_NAME (type, i), ""))
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277 |
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fputs_filtered (" = ", stream);
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278 |
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annotate_field_value ();
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279 |
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}
|
280 |
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|
281 |
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if (!field_is_static (&TYPE_FIELD (type, i))
|
282 |
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&& TYPE_FIELD_PACKED (type, i))
|
283 |
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{
|
284 |
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struct value *v;
|
285 |
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|
286 |
|
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/* Bitfields require special handling, especially due to byte
|
287 |
|
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order problems. */
|
288 |
|
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if (TYPE_FIELD_IGNORE (type, i))
|
289 |
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{
|
290 |
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fputs_filtered ("<optimized out or zero length>", stream);
|
291 |
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}
|
292 |
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else if (!value_bits_valid (val, TYPE_FIELD_BITPOS (type, i),
|
293 |
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TYPE_FIELD_BITSIZE (type, i)))
|
294 |
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{
|
295 |
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fputs_filtered (_("<value optimized out>"), stream);
|
296 |
|
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}
|
297 |
|
|
else
|
298 |
|
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{
|
299 |
|
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struct value_print_options opts = *options;
|
300 |
|
|
|
301 |
|
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opts.deref_ref = 0;
|
302 |
|
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v = value_from_longest
|
303 |
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(TYPE_FIELD_TYPE (type, i),
|
304 |
|
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unpack_field_as_long (type, valaddr + offset, i));
|
305 |
|
|
|
306 |
|
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common_val_print (v, stream, recurse + 1, &opts,
|
307 |
|
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current_language);
|
308 |
|
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}
|
309 |
|
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}
|
310 |
|
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else
|
311 |
|
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{
|
312 |
|
|
if (TYPE_FIELD_IGNORE (type, i))
|
313 |
|
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{
|
314 |
|
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fputs_filtered ("<optimized out or zero length>", stream);
|
315 |
|
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}
|
316 |
|
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else if (field_is_static (&TYPE_FIELD (type, i)))
|
317 |
|
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{
|
318 |
|
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struct value *v = value_static_field (type, i);
|
319 |
|
|
|
320 |
|
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if (v == NULL)
|
321 |
|
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fputs_filtered ("<optimized out>", stream);
|
322 |
|
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else
|
323 |
|
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cp_print_static_field (TYPE_FIELD_TYPE (type, i), v,
|
324 |
|
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stream, recurse + 1, options);
|
325 |
|
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}
|
326 |
|
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else
|
327 |
|
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{
|
328 |
|
|
struct value_print_options opts = *options;
|
329 |
|
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|
330 |
|
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opts.deref_ref = 0;
|
331 |
|
|
val_print (TYPE_FIELD_TYPE (type, i),
|
332 |
|
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valaddr, offset + TYPE_FIELD_BITPOS (type, i) / 8,
|
333 |
|
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address,
|
334 |
|
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stream, recurse + 1, val, &opts,
|
335 |
|
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current_language);
|
336 |
|
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}
|
337 |
|
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}
|
338 |
|
|
annotate_field_end ();
|
339 |
|
|
}
|
340 |
|
|
|
341 |
|
|
if (dont_print_statmem == 0)
|
342 |
|
|
{
|
343 |
|
|
int obstack_final_size =
|
344 |
|
|
obstack_object_size (&dont_print_statmem_obstack);
|
345 |
|
|
|
346 |
|
|
if (obstack_final_size > statmem_obstack_initial_size) {
|
347 |
|
|
/* In effect, a pop of the printed-statics stack. */
|
348 |
|
|
|
349 |
|
|
void *free_to_ptr =
|
350 |
|
|
obstack_next_free (&dont_print_statmem_obstack) -
|
351 |
|
|
(obstack_final_size - statmem_obstack_initial_size);
|
352 |
|
|
|
353 |
|
|
obstack_free (&dont_print_statmem_obstack,
|
354 |
|
|
free_to_ptr);
|
355 |
|
|
}
|
356 |
|
|
|
357 |
|
|
if (last_set_recurse != recurse)
|
358 |
|
|
{
|
359 |
|
|
int obstack_final_size =
|
360 |
|
|
obstack_object_size (&dont_print_stat_array_obstack);
|
361 |
|
|
|
362 |
|
|
if (obstack_final_size > stat_array_obstack_initial_size)
|
363 |
|
|
{
|
364 |
|
|
void *free_to_ptr =
|
365 |
|
|
obstack_next_free (&dont_print_stat_array_obstack) -
|
366 |
|
|
(obstack_final_size - stat_array_obstack_initial_size);
|
367 |
|
|
|
368 |
|
|
obstack_free (&dont_print_stat_array_obstack,
|
369 |
|
|
free_to_ptr);
|
370 |
|
|
}
|
371 |
|
|
last_set_recurse = -1;
|
372 |
|
|
}
|
373 |
|
|
}
|
374 |
|
|
|
375 |
|
|
if (options->pretty)
|
376 |
|
|
{
|
377 |
|
|
fprintf_filtered (stream, "\n");
|
378 |
|
|
print_spaces_filtered (2 * recurse, stream);
|
379 |
|
|
}
|
380 |
|
|
} /* if there are data fields */
|
381 |
|
|
|
382 |
|
|
fprintf_filtered (stream, "}");
|
383 |
|
|
}
|
384 |
|
|
|
385 |
|
|
/* Like cp_print_value_fields, but find the runtime type of the object
|
386 |
|
|
and pass it as the `real_type' argument to cp_print_value_fields.
|
387 |
|
|
This function is a hack to work around the fact that
|
388 |
|
|
common_val_print passes the embedded offset to val_print, but not
|
389 |
|
|
the enclosing type. */
|
390 |
|
|
|
391 |
|
|
void
|
392 |
|
|
cp_print_value_fields_rtti (struct type *type,
|
393 |
|
|
const gdb_byte *valaddr, int offset,
|
394 |
|
|
CORE_ADDR address,
|
395 |
|
|
struct ui_file *stream, int recurse,
|
396 |
|
|
const struct value *val,
|
397 |
|
|
const struct value_print_options *options,
|
398 |
|
|
struct type **dont_print_vb,
|
399 |
|
|
int dont_print_statmem)
|
400 |
|
|
{
|
401 |
|
|
struct type *real_type = NULL;
|
402 |
|
|
|
403 |
|
|
/* We require all bits to be valid in order to attempt a
|
404 |
|
|
conversion. */
|
405 |
|
|
if (value_bits_valid (val, TARGET_CHAR_BIT * offset,
|
406 |
|
|
TARGET_CHAR_BIT * TYPE_LENGTH (type)))
|
407 |
|
|
{
|
408 |
|
|
struct value *value;
|
409 |
|
|
int full, top, using_enc;
|
410 |
|
|
|
411 |
|
|
/* Ugh, we have to convert back to a value here. */
|
412 |
|
|
value = value_from_contents_and_address (type, valaddr + offset,
|
413 |
|
|
address + offset);
|
414 |
|
|
/* We don't actually care about most of the result here -- just the
|
415 |
|
|
type. We already have the correct offset, due to how val_print
|
416 |
|
|
was initially called. */
|
417 |
|
|
real_type = value_rtti_type (value, &full, &top, &using_enc);
|
418 |
|
|
}
|
419 |
|
|
|
420 |
|
|
if (!real_type)
|
421 |
|
|
real_type = type;
|
422 |
|
|
|
423 |
|
|
cp_print_value_fields (type, real_type, valaddr, offset,
|
424 |
|
|
address, stream, recurse, val, options,
|
425 |
|
|
dont_print_vb, dont_print_statmem);
|
426 |
|
|
}
|
427 |
|
|
|
428 |
|
|
/* Special val_print routine to avoid printing multiple copies of virtual
|
429 |
|
|
baseclasses. */
|
430 |
|
|
|
431 |
|
|
static void
|
432 |
|
|
cp_print_value (struct type *type, struct type *real_type,
|
433 |
|
|
const gdb_byte *valaddr, int offset, CORE_ADDR address,
|
434 |
|
|
struct ui_file *stream, int recurse,
|
435 |
|
|
const struct value *val,
|
436 |
|
|
const struct value_print_options *options,
|
437 |
|
|
struct type **dont_print_vb)
|
438 |
|
|
{
|
439 |
|
|
struct type **last_dont_print
|
440 |
|
|
= (struct type **) obstack_next_free (&dont_print_vb_obstack);
|
441 |
|
|
struct obstack tmp_obstack = dont_print_vb_obstack;
|
442 |
|
|
int i, n_baseclasses = TYPE_N_BASECLASSES (type);
|
443 |
|
|
int thisoffset;
|
444 |
|
|
struct type *thistype;
|
445 |
|
|
|
446 |
|
|
if (dont_print_vb == 0)
|
447 |
|
|
{
|
448 |
|
|
/* If we're at top level, carve out a completely fresh
|
449 |
|
|
chunk of the obstack and use that until this particular
|
450 |
|
|
invocation returns. */
|
451 |
|
|
/* Bump up the high-water mark. Now alpha is omega. */
|
452 |
|
|
obstack_finish (&dont_print_vb_obstack);
|
453 |
|
|
}
|
454 |
|
|
|
455 |
|
|
for (i = 0; i < n_baseclasses; i++)
|
456 |
|
|
{
|
457 |
|
|
int boffset;
|
458 |
|
|
int skip;
|
459 |
|
|
struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
|
460 |
|
|
char *basename = TYPE_NAME (baseclass);
|
461 |
|
|
const gdb_byte *base_valaddr;
|
462 |
|
|
|
463 |
|
|
if (BASETYPE_VIA_VIRTUAL (type, i))
|
464 |
|
|
{
|
465 |
|
|
struct type **first_dont_print
|
466 |
|
|
= (struct type **) obstack_base (&dont_print_vb_obstack);
|
467 |
|
|
|
468 |
|
|
int j = (struct type **) obstack_next_free (&dont_print_vb_obstack)
|
469 |
|
|
- first_dont_print;
|
470 |
|
|
|
471 |
|
|
while (--j >= 0)
|
472 |
|
|
if (baseclass == first_dont_print[j])
|
473 |
|
|
goto flush_it;
|
474 |
|
|
|
475 |
|
|
obstack_ptr_grow (&dont_print_vb_obstack, baseclass);
|
476 |
|
|
}
|
477 |
|
|
|
478 |
|
|
thisoffset = offset;
|
479 |
|
|
thistype = real_type;
|
480 |
|
|
|
481 |
|
|
boffset = baseclass_offset (type, i, valaddr + offset, address + offset);
|
482 |
|
|
skip = ((boffset == -1) || (boffset + offset) < 0) ? 1 : -1;
|
483 |
|
|
|
484 |
|
|
if (BASETYPE_VIA_VIRTUAL (type, i))
|
485 |
|
|
{
|
486 |
|
|
/* The virtual base class pointer might have been
|
487 |
|
|
clobbered by the user program. Make sure that it
|
488 |
|
|
still points to a valid memory location. */
|
489 |
|
|
|
490 |
|
|
if (boffset != -1
|
491 |
|
|
&& ((boffset + offset) < 0
|
492 |
|
|
|| (boffset + offset) >= TYPE_LENGTH (real_type)))
|
493 |
|
|
{
|
494 |
|
|
/* FIXME (alloca): unsafe if baseclass is really really large. */
|
495 |
|
|
gdb_byte *buf = alloca (TYPE_LENGTH (baseclass));
|
496 |
|
|
|
497 |
|
|
base_valaddr = buf;
|
498 |
|
|
if (target_read_memory (address + boffset, buf,
|
499 |
|
|
TYPE_LENGTH (baseclass)) != 0)
|
500 |
|
|
skip = 1;
|
501 |
|
|
address = address + boffset;
|
502 |
|
|
thisoffset = 0;
|
503 |
|
|
boffset = 0;
|
504 |
|
|
thistype = baseclass;
|
505 |
|
|
}
|
506 |
|
|
else
|
507 |
|
|
base_valaddr = valaddr;
|
508 |
|
|
}
|
509 |
|
|
else
|
510 |
|
|
base_valaddr = valaddr;
|
511 |
|
|
|
512 |
|
|
/* now do the printing */
|
513 |
|
|
if (options->pretty)
|
514 |
|
|
{
|
515 |
|
|
fprintf_filtered (stream, "\n");
|
516 |
|
|
print_spaces_filtered (2 * recurse, stream);
|
517 |
|
|
}
|
518 |
|
|
fputs_filtered ("<", stream);
|
519 |
|
|
/* Not sure what the best notation is in the case where there is no
|
520 |
|
|
baseclass name. */
|
521 |
|
|
fputs_filtered (basename ? basename : "", stream);
|
522 |
|
|
fputs_filtered ("> = ", stream);
|
523 |
|
|
|
524 |
|
|
|
525 |
|
|
if (skip >= 1)
|
526 |
|
|
fprintf_filtered (stream, "<invalid address>");
|
527 |
|
|
else
|
528 |
|
|
{
|
529 |
|
|
int result = 0;
|
530 |
|
|
|
531 |
|
|
/* Attempt to run the Python pretty-printers on the
|
532 |
|
|
baseclass if possible. */
|
533 |
|
|
if (!options->raw)
|
534 |
|
|
result = apply_val_pretty_printer (baseclass, base_valaddr,
|
535 |
|
|
thisoffset + boffset,
|
536 |
|
|
address,
|
537 |
|
|
stream, recurse, val,
|
538 |
|
|
options,
|
539 |
|
|
current_language);
|
540 |
|
|
|
541 |
|
|
if (!result)
|
542 |
|
|
cp_print_value_fields (baseclass, thistype, base_valaddr,
|
543 |
|
|
thisoffset + boffset, address,
|
544 |
|
|
stream, recurse, val, options,
|
545 |
|
|
((struct type **)
|
546 |
|
|
obstack_base (&dont_print_vb_obstack)),
|
547 |
|
|
0);
|
548 |
|
|
}
|
549 |
|
|
fputs_filtered (", ", stream);
|
550 |
|
|
|
551 |
|
|
flush_it:
|
552 |
|
|
;
|
553 |
|
|
}
|
554 |
|
|
|
555 |
|
|
if (dont_print_vb == 0)
|
556 |
|
|
{
|
557 |
|
|
/* Free the space used to deal with the printing
|
558 |
|
|
of this type from top level. */
|
559 |
|
|
obstack_free (&dont_print_vb_obstack, last_dont_print);
|
560 |
|
|
/* Reset watermark so that we can continue protecting
|
561 |
|
|
ourselves from whatever we were protecting ourselves. */
|
562 |
|
|
dont_print_vb_obstack = tmp_obstack;
|
563 |
|
|
}
|
564 |
|
|
}
|
565 |
|
|
|
566 |
|
|
/* Print value of a static member.
|
567 |
|
|
To avoid infinite recursion when printing a class that contains
|
568 |
|
|
a static instance of the class, we keep the addresses of all printed
|
569 |
|
|
static member classes in an obstack and refuse to print them more
|
570 |
|
|
than once.
|
571 |
|
|
|
572 |
|
|
VAL contains the value to print, TYPE, STREAM, RECURSE, and OPTIONS
|
573 |
|
|
have the same meanings as in c_val_print. */
|
574 |
|
|
|
575 |
|
|
static void
|
576 |
|
|
cp_print_static_field (struct type *type,
|
577 |
|
|
struct value *val,
|
578 |
|
|
struct ui_file *stream,
|
579 |
|
|
int recurse,
|
580 |
|
|
const struct value_print_options *options)
|
581 |
|
|
{
|
582 |
|
|
struct value_print_options opts;
|
583 |
|
|
|
584 |
|
|
if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
|
585 |
|
|
{
|
586 |
|
|
CORE_ADDR *first_dont_print;
|
587 |
|
|
CORE_ADDR addr;
|
588 |
|
|
int i;
|
589 |
|
|
|
590 |
|
|
first_dont_print
|
591 |
|
|
= (CORE_ADDR *) obstack_base (&dont_print_statmem_obstack);
|
592 |
|
|
i = obstack_object_size (&dont_print_statmem_obstack)
|
593 |
|
|
/ sizeof (CORE_ADDR);
|
594 |
|
|
|
595 |
|
|
while (--i >= 0)
|
596 |
|
|
{
|
597 |
|
|
if (value_address (val) == first_dont_print[i])
|
598 |
|
|
{
|
599 |
|
|
fputs_filtered ("<same as static member of an already"
|
600 |
|
|
" seen type>",
|
601 |
|
|
stream);
|
602 |
|
|
return;
|
603 |
|
|
}
|
604 |
|
|
}
|
605 |
|
|
|
606 |
|
|
addr = value_address (val);
|
607 |
|
|
obstack_grow (&dont_print_statmem_obstack, (char *) &addr,
|
608 |
|
|
sizeof (CORE_ADDR));
|
609 |
|
|
CHECK_TYPEDEF (type);
|
610 |
|
|
cp_print_value_fields (type, value_enclosing_type (val),
|
611 |
|
|
value_contents_for_printing (val),
|
612 |
|
|
value_embedded_offset (val), addr,
|
613 |
|
|
stream, recurse,
|
614 |
|
|
val, options, NULL, 1);
|
615 |
|
|
return;
|
616 |
|
|
}
|
617 |
|
|
|
618 |
|
|
if (TYPE_CODE (type) == TYPE_CODE_ARRAY)
|
619 |
|
|
{
|
620 |
|
|
struct type **first_dont_print;
|
621 |
|
|
int i;
|
622 |
|
|
struct type *target_type = TYPE_TARGET_TYPE (type);
|
623 |
|
|
|
624 |
|
|
first_dont_print
|
625 |
|
|
= (struct type **) obstack_base (&dont_print_stat_array_obstack);
|
626 |
|
|
i = obstack_object_size (&dont_print_stat_array_obstack)
|
627 |
|
|
/ sizeof (struct type *);
|
628 |
|
|
|
629 |
|
|
while (--i >= 0)
|
630 |
|
|
{
|
631 |
|
|
if (target_type == first_dont_print[i])
|
632 |
|
|
{
|
633 |
|
|
fputs_filtered ("<same as static member of an already"
|
634 |
|
|
" seen type>",
|
635 |
|
|
stream);
|
636 |
|
|
return;
|
637 |
|
|
}
|
638 |
|
|
}
|
639 |
|
|
|
640 |
|
|
obstack_grow (&dont_print_stat_array_obstack, (char *) &target_type,
|
641 |
|
|
sizeof (struct type *));
|
642 |
|
|
}
|
643 |
|
|
|
644 |
|
|
opts = *options;
|
645 |
|
|
opts.deref_ref = 0;
|
646 |
|
|
val_print (type, value_contents_for_printing (val),
|
647 |
|
|
value_embedded_offset (val), value_address (val),
|
648 |
|
|
stream, recurse,
|
649 |
|
|
val, &opts, current_language);
|
650 |
|
|
}
|
651 |
|
|
|
652 |
|
|
|
653 |
|
|
/* Find the field in *DOMAIN, or its non-virtual base classes, with bit offset
|
654 |
|
|
OFFSET. Set *DOMAIN to the containing type and *FIELDNO to the containing
|
655 |
|
|
field number. If OFFSET is not exactly at the start of some field, set
|
656 |
|
|
*DOMAIN to NULL. */
|
657 |
|
|
|
658 |
|
|
static void
|
659 |
|
|
cp_find_class_member (struct type **domain_p, int *fieldno,
|
660 |
|
|
LONGEST offset)
|
661 |
|
|
{
|
662 |
|
|
struct type *domain;
|
663 |
|
|
unsigned int i;
|
664 |
|
|
unsigned len;
|
665 |
|
|
|
666 |
|
|
*domain_p = check_typedef (*domain_p);
|
667 |
|
|
domain = *domain_p;
|
668 |
|
|
len = TYPE_NFIELDS (domain);
|
669 |
|
|
|
670 |
|
|
for (i = TYPE_N_BASECLASSES (domain); i < len; i++)
|
671 |
|
|
{
|
672 |
|
|
LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i);
|
673 |
|
|
|
674 |
|
|
QUIT;
|
675 |
|
|
if (offset == bitpos)
|
676 |
|
|
{
|
677 |
|
|
*fieldno = i;
|
678 |
|
|
return;
|
679 |
|
|
}
|
680 |
|
|
}
|
681 |
|
|
|
682 |
|
|
for (i = 0; i < TYPE_N_BASECLASSES (domain); i++)
|
683 |
|
|
{
|
684 |
|
|
LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i);
|
685 |
|
|
LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (domain, i));
|
686 |
|
|
|
687 |
|
|
if (offset >= bitpos && offset < bitpos + bitsize)
|
688 |
|
|
{
|
689 |
|
|
*domain_p = TYPE_FIELD_TYPE (domain, i);
|
690 |
|
|
cp_find_class_member (domain_p, fieldno, offset - bitpos);
|
691 |
|
|
return;
|
692 |
|
|
}
|
693 |
|
|
}
|
694 |
|
|
|
695 |
|
|
*domain_p = NULL;
|
696 |
|
|
}
|
697 |
|
|
|
698 |
|
|
void
|
699 |
|
|
cp_print_class_member (const gdb_byte *valaddr, struct type *type,
|
700 |
|
|
struct ui_file *stream, char *prefix)
|
701 |
|
|
{
|
702 |
|
|
enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type));
|
703 |
|
|
|
704 |
|
|
/* VAL is a byte offset into the structure type DOMAIN.
|
705 |
|
|
Find the name of the field for that offset and
|
706 |
|
|
print it. */
|
707 |
|
|
struct type *domain = TYPE_DOMAIN_TYPE (type);
|
708 |
|
|
LONGEST val;
|
709 |
|
|
unsigned int fieldno;
|
710 |
|
|
|
711 |
|
|
val = extract_signed_integer (valaddr, TYPE_LENGTH (type), byte_order);
|
712 |
|
|
|
713 |
|
|
/* Pointers to data members are usually byte offsets into an object.
|
714 |
|
|
Because a data member can have offset zero, and a NULL pointer to
|
715 |
|
|
member must be distinct from any valid non-NULL pointer to
|
716 |
|
|
member, either the value is biased or the NULL value has a
|
717 |
|
|
special representation; both are permitted by ISO C++. HP aCC
|
718 |
|
|
used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x
|
719 |
|
|
and other compilers which use the Itanium ABI use -1 as the NULL
|
720 |
|
|
value. GDB only supports that last form; to add support for
|
721 |
|
|
another form, make this into a cp-abi hook. */
|
722 |
|
|
|
723 |
|
|
if (val == -1)
|
724 |
|
|
{
|
725 |
|
|
fprintf_filtered (stream, "NULL");
|
726 |
|
|
return;
|
727 |
|
|
}
|
728 |
|
|
|
729 |
|
|
cp_find_class_member (&domain, &fieldno, val << 3);
|
730 |
|
|
|
731 |
|
|
if (domain != NULL)
|
732 |
|
|
{
|
733 |
|
|
char *name;
|
734 |
|
|
|
735 |
|
|
fputs_filtered (prefix, stream);
|
736 |
|
|
name = type_name_no_tag (domain);
|
737 |
|
|
if (name)
|
738 |
|
|
fputs_filtered (name, stream);
|
739 |
|
|
else
|
740 |
|
|
c_type_print_base (domain, stream, 0, 0);
|
741 |
|
|
fprintf_filtered (stream, "::");
|
742 |
|
|
fputs_filtered (TYPE_FIELD_NAME (domain, fieldno), stream);
|
743 |
|
|
}
|
744 |
|
|
else
|
745 |
|
|
fprintf_filtered (stream, "%ld", (long) val);
|
746 |
|
|
}
|
747 |
|
|
|
748 |
|
|
|
749 |
|
|
void
|
750 |
|
|
_initialize_cp_valprint (void)
|
751 |
|
|
{
|
752 |
|
|
add_setshow_boolean_cmd ("static-members", class_support,
|
753 |
|
|
&user_print_options.static_field_print, _("\
|
754 |
|
|
Set printing of C++ static members."), _("\
|
755 |
|
|
Show printing of C++ static members."), NULL,
|
756 |
|
|
NULL,
|
757 |
|
|
show_static_field_print,
|
758 |
|
|
&setprintlist, &showprintlist);
|
759 |
|
|
|
760 |
|
|
add_setshow_boolean_cmd ("vtbl", class_support,
|
761 |
|
|
&user_print_options.vtblprint, _("\
|
762 |
|
|
Set printing of C++ virtual function tables."), _("\
|
763 |
|
|
Show printing of C++ virtual function tables."), NULL,
|
764 |
|
|
NULL,
|
765 |
|
|
show_vtblprint,
|
766 |
|
|
&setprintlist, &showprintlist);
|
767 |
|
|
|
768 |
|
|
add_setshow_boolean_cmd ("object", class_support,
|
769 |
|
|
&user_print_options.objectprint, _("\
|
770 |
|
|
Set printing of object's derived type based on vtable info."), _("\
|
771 |
|
|
Show printing of object's derived type based on vtable info."), NULL,
|
772 |
|
|
NULL,
|
773 |
|
|
show_objectprint,
|
774 |
|
|
&setprintlist, &showprintlist);
|
775 |
|
|
|
776 |
|
|
obstack_begin (&dont_print_stat_array_obstack, 32 * sizeof (struct type *));
|
777 |
|
|
obstack_begin (&dont_print_statmem_obstack, 32 * sizeof (CORE_ADDR));
|
778 |
|
|
obstack_begin (&dont_print_vb_obstack, 32 * sizeof (struct type *));
|
779 |
|
|
}
|