fe978cb071
This patch renames symbols that happen to have names which are reserved keywords in C++. Most of this was generated with Tromey's cxx-conversion.el script. Some places where later hand massaged a bit, to fix formatting, etc. And this was rebased several times meanwhile, along with re-running the script, so re-running the script from scratch probably does not result in the exact same output. I don't think that matters anyway. gdb/ 2015-02-27 Tom Tromey <tromey@redhat.com> Pedro Alves <palves@redhat.com> Rename symbols whose names are reserved C++ keywords throughout. gdb/gdbserver/ 2015-02-27 Tom Tromey <tromey@redhat.com> Pedro Alves <palves@redhat.com> Rename symbols whose names are reserved C++ keywords throughout.
726 lines
18 KiB
C
726 lines
18 KiB
C
/* Language independent support for printing types for GDB, the GNU debugger.
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Copyright (C) 1986-2015 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 "bfd.h" /* Binary File Description */
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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 "gdbcore.h"
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#include "command.h"
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#include "gdbcmd.h"
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#include "target.h"
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#include "language.h"
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#include "cp-abi.h"
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#include "typeprint.h"
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#include "valprint.h"
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#include <ctype.h>
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#include "cli/cli-utils.h"
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#include "extension.h"
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#include "completer.h"
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extern void _initialize_typeprint (void);
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static void ptype_command (char *, int);
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static void whatis_command (char *, int);
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static void whatis_exp (char *, int);
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const struct type_print_options type_print_raw_options =
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{
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1, /* raw */
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1, /* print_methods */
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1, /* print_typedefs */
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NULL, /* local_typedefs */
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NULL, /* global_table */
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NULL /* global_printers */
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};
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/* The default flags for 'ptype' and 'whatis'. */
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static struct type_print_options default_ptype_flags =
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{
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0, /* raw */
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1, /* print_methods */
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1, /* print_typedefs */
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NULL, /* local_typedefs */
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NULL, /* global_table */
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NULL /* global_printers */
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};
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/* A hash table holding typedef_field objects. This is more
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complicated than an ordinary hash because it must also track the
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lifetime of some -- but not all -- of the contained objects. */
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struct typedef_hash_table
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{
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/* The actual hash table. */
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htab_t table;
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/* Storage for typedef_field objects that must be synthesized. */
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struct obstack storage;
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};
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/* A hash function for a typedef_field. */
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static hashval_t
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hash_typedef_field (const void *p)
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{
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const struct typedef_field *tf = p;
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struct type *t = check_typedef (tf->type);
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return htab_hash_string (TYPE_SAFE_NAME (t));
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}
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/* An equality function for a typedef field. */
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static int
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eq_typedef_field (const void *a, const void *b)
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{
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const struct typedef_field *tfa = a;
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const struct typedef_field *tfb = b;
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return types_equal (tfa->type, tfb->type);
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}
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/* Add typedefs from T to the hash table TABLE. */
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void
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recursively_update_typedef_hash (struct typedef_hash_table *table,
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struct type *t)
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{
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int i;
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if (table == NULL)
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return;
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for (i = 0; i < TYPE_TYPEDEF_FIELD_COUNT (t); ++i)
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{
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struct typedef_field *tdef = &TYPE_TYPEDEF_FIELD (t, i);
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void **slot;
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slot = htab_find_slot (table->table, tdef, INSERT);
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/* Only add a given typedef name once. Really this shouldn't
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happen; but it is safe enough to do the updates breadth-first
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and thus use the most specific typedef. */
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if (*slot == NULL)
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*slot = tdef;
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}
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/* Recurse into superclasses. */
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for (i = 0; i < TYPE_N_BASECLASSES (t); ++i)
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recursively_update_typedef_hash (table, TYPE_BASECLASS (t, i));
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}
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/* Add template parameters from T to the typedef hash TABLE. */
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void
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add_template_parameters (struct typedef_hash_table *table, struct type *t)
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{
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int i;
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if (table == NULL)
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return;
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for (i = 0; i < TYPE_N_TEMPLATE_ARGUMENTS (t); ++i)
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{
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struct typedef_field *tf;
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void **slot;
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/* We only want type-valued template parameters in the hash. */
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if (SYMBOL_CLASS (TYPE_TEMPLATE_ARGUMENT (t, i)) != LOC_TYPEDEF)
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continue;
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tf = XOBNEW (&table->storage, struct typedef_field);
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tf->name = SYMBOL_LINKAGE_NAME (TYPE_TEMPLATE_ARGUMENT (t, i));
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tf->type = SYMBOL_TYPE (TYPE_TEMPLATE_ARGUMENT (t, i));
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slot = htab_find_slot (table->table, tf, INSERT);
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if (*slot == NULL)
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*slot = tf;
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}
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}
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/* Create a new typedef-lookup hash table. */
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struct typedef_hash_table *
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create_typedef_hash (void)
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{
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struct typedef_hash_table *result;
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result = XNEW (struct typedef_hash_table);
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result->table = htab_create_alloc (10, hash_typedef_field, eq_typedef_field,
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NULL, xcalloc, xfree);
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obstack_init (&result->storage);
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return result;
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}
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/* Free a typedef field table. */
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void
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free_typedef_hash (struct typedef_hash_table *table)
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{
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if (table != NULL)
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{
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htab_delete (table->table);
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obstack_free (&table->storage, NULL);
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xfree (table);
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}
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}
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/* A cleanup for freeing a typedef_hash_table. */
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static void
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do_free_typedef_hash (void *arg)
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{
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free_typedef_hash (arg);
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}
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/* Return a new cleanup that frees TABLE. */
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struct cleanup *
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make_cleanup_free_typedef_hash (struct typedef_hash_table *table)
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{
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return make_cleanup (do_free_typedef_hash, table);
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}
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/* Helper function for copy_typedef_hash. */
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static int
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copy_typedef_hash_element (void **slot, void *nt)
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{
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htab_t new_table = nt;
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void **new_slot;
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new_slot = htab_find_slot (new_table, *slot, INSERT);
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if (*new_slot == NULL)
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*new_slot = *slot;
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return 1;
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}
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/* Copy a typedef hash. */
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struct typedef_hash_table *
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copy_typedef_hash (struct typedef_hash_table *table)
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{
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struct typedef_hash_table *result;
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if (table == NULL)
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return NULL;
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result = create_typedef_hash ();
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htab_traverse_noresize (table->table, copy_typedef_hash_element,
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result->table);
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return result;
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}
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/* A cleanup to free the global typedef hash. */
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static void
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do_free_global_table (void *arg)
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{
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struct type_print_options *flags = arg;
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free_typedef_hash (flags->global_typedefs);
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free_ext_lang_type_printers (flags->global_printers);
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}
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/* Create the global typedef hash. */
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static struct cleanup *
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create_global_typedef_table (struct type_print_options *flags)
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{
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gdb_assert (flags->global_typedefs == NULL && flags->global_printers == NULL);
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flags->global_typedefs = create_typedef_hash ();
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flags->global_printers = start_ext_lang_type_printers ();
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return make_cleanup (do_free_global_table, flags);
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}
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/* Look up the type T in the global typedef hash. If it is found,
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return the typedef name. If it is not found, apply the
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type-printers, if any, given by start_script_type_printers and return the
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result. A NULL return means that the name was not found. */
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static const char *
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find_global_typedef (const struct type_print_options *flags,
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struct type *t)
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{
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char *applied;
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void **slot;
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struct typedef_field tf, *new_tf;
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if (flags->global_typedefs == NULL)
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return NULL;
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tf.name = NULL;
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tf.type = t;
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slot = htab_find_slot (flags->global_typedefs->table, &tf, INSERT);
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if (*slot != NULL)
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{
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new_tf = *slot;
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return new_tf->name;
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}
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/* Put an entry into the hash table now, in case
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apply_ext_lang_type_printers recurses. */
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new_tf = XOBNEW (&flags->global_typedefs->storage, struct typedef_field);
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new_tf->name = NULL;
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new_tf->type = t;
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*slot = new_tf;
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applied = apply_ext_lang_type_printers (flags->global_printers, t);
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if (applied != NULL)
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{
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new_tf->name = obstack_copy0 (&flags->global_typedefs->storage, applied,
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strlen (applied));
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xfree (applied);
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}
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return new_tf->name;
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}
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/* Look up the type T in the typedef hash table in with FLAGS. If T
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is in the table, return its short (class-relative) typedef name.
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Otherwise return NULL. If the table is NULL, this always returns
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NULL. */
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const char *
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find_typedef_in_hash (const struct type_print_options *flags, struct type *t)
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{
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if (flags->local_typedefs != NULL)
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{
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struct typedef_field tf, *found;
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tf.name = NULL;
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tf.type = t;
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found = htab_find (flags->local_typedefs->table, &tf);
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if (found != NULL)
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return found->name;
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}
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return find_global_typedef (flags, t);
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}
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/* Print a description of a type in the format of a
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typedef for the current language.
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NEW is the new name for a type TYPE. */
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void
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typedef_print (struct type *type, struct symbol *newobj, struct ui_file *stream)
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{
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LA_PRINT_TYPEDEF (type, newobj, stream);
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}
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/* The default way to print a typedef. */
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void
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default_print_typedef (struct type *type, struct symbol *new_symbol,
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struct ui_file *stream)
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{
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error (_("Language not supported."));
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}
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/* Print a description of a type TYPE in the form of a declaration of a
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variable named VARSTRING. (VARSTRING is demangled if necessary.)
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Output goes to STREAM (via stdio).
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If SHOW is positive, we show the contents of the outermost level
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of structure even if there is a type name that could be used instead.
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If SHOW is negative, we never show the details of elements' types. */
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void
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type_print (struct type *type, const char *varstring, struct ui_file *stream,
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int show)
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{
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LA_PRINT_TYPE (type, varstring, stream, show, 0, &default_ptype_flags);
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}
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/* Print TYPE to a string, returning it. The caller is responsible for
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freeing the string. */
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char *
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type_to_string (struct type *type)
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{
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char *s = NULL;
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struct ui_file *stb;
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struct cleanup *old_chain;
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volatile struct gdb_exception except;
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stb = mem_fileopen ();
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old_chain = make_cleanup_ui_file_delete (stb);
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TRY_CATCH (except, RETURN_MASK_ALL)
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{
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type_print (type, "", stb, -1);
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s = ui_file_xstrdup (stb, NULL);
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}
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if (except.reason < 0)
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s = NULL;
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do_cleanups (old_chain);
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return s;
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}
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/* Print type of EXP, or last thing in value history if EXP == NULL.
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show is passed to type_print. */
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static void
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whatis_exp (char *exp, int show)
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{
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struct expression *expr;
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struct value *val;
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struct cleanup *old_chain;
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struct type *real_type = NULL;
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struct type *type;
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int full = 0;
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int top = -1;
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int using_enc = 0;
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struct value_print_options opts;
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struct type_print_options flags = default_ptype_flags;
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old_chain = make_cleanup (null_cleanup, NULL);
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if (exp)
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{
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if (*exp == '/')
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{
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int seen_one = 0;
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for (++exp; *exp && !isspace (*exp); ++exp)
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{
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switch (*exp)
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{
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case 'r':
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flags.raw = 1;
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break;
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case 'm':
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flags.print_methods = 0;
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break;
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case 'M':
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flags.print_methods = 1;
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break;
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case 't':
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flags.print_typedefs = 0;
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break;
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case 'T':
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flags.print_typedefs = 1;
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break;
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default:
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error (_("unrecognized flag '%c'"), *exp);
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}
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seen_one = 1;
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}
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if (!*exp && !seen_one)
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error (_("flag expected"));
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if (!isspace (*exp))
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error (_("expected space after format"));
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exp = skip_spaces (exp);
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}
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expr = parse_expression (exp);
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make_cleanup (free_current_contents, &expr);
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val = evaluate_type (expr);
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}
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else
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val = access_value_history (0);
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type = value_type (val);
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get_user_print_options (&opts);
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if (opts.objectprint)
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{
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if (((TYPE_CODE (type) == TYPE_CODE_PTR)
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|| (TYPE_CODE (type) == TYPE_CODE_REF))
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&& (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT))
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real_type = value_rtti_indirect_type (val, &full, &top, &using_enc);
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else if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
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real_type = value_rtti_type (val, &full, &top, &using_enc);
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}
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printf_filtered ("type = ");
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if (!flags.raw)
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create_global_typedef_table (&flags);
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if (real_type)
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{
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printf_filtered ("/* real type = ");
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type_print (real_type, "", gdb_stdout, -1);
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if (! full)
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printf_filtered (" (incomplete object)");
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printf_filtered (" */\n");
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}
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LA_PRINT_TYPE (type, "", gdb_stdout, show, 0, &flags);
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printf_filtered ("\n");
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do_cleanups (old_chain);
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}
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static void
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whatis_command (char *exp, int from_tty)
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{
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/* Most of the time users do not want to see all the fields
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in a structure. If they do they can use the "ptype" command.
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Hence the "-1" below. */
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whatis_exp (exp, -1);
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}
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/* TYPENAME is either the name of a type, or an expression. */
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static void
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ptype_command (char *type_name, int from_tty)
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{
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whatis_exp (type_name, 1);
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}
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/* Print integral scalar data VAL, of type TYPE, onto stdio stream STREAM.
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Used to print data from type structures in a specified type. For example,
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array bounds may be characters or booleans in some languages, and this
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allows the ranges to be printed in their "natural" form rather than as
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decimal integer values.
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FIXME: This is here simply because only the type printing routines
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currently use it, and it wasn't clear if it really belonged somewhere
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else (like printcmd.c). There are a lot of other gdb routines that do
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something similar, but they are generally concerned with printing values
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that come from the inferior in target byte order and target size. */
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void
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print_type_scalar (struct type *type, LONGEST val, struct ui_file *stream)
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{
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unsigned int i;
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unsigned len;
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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_ENUM:
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len = TYPE_NFIELDS (type);
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for (i = 0; i < len; i++)
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{
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if (TYPE_FIELD_ENUMVAL (type, i) == val)
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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_INT:
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print_longest (stream, TYPE_UNSIGNED (type) ? 'u' : 'd', 0, val);
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break;
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case TYPE_CODE_CHAR:
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LA_PRINT_CHAR ((unsigned char) val, type, stream);
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break;
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case TYPE_CODE_BOOL:
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fprintf_filtered (stream, val ? "TRUE" : "FALSE");
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break;
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||
|
||
case TYPE_CODE_RANGE:
|
||
print_type_scalar (TYPE_TARGET_TYPE (type), val, stream);
|
||
return;
|
||
|
||
case TYPE_CODE_UNDEF:
|
||
case TYPE_CODE_PTR:
|
||
case TYPE_CODE_ARRAY:
|
||
case TYPE_CODE_STRUCT:
|
||
case TYPE_CODE_UNION:
|
||
case TYPE_CODE_FUNC:
|
||
case TYPE_CODE_FLT:
|
||
case TYPE_CODE_VOID:
|
||
case TYPE_CODE_SET:
|
||
case TYPE_CODE_STRING:
|
||
case TYPE_CODE_ERROR:
|
||
case TYPE_CODE_MEMBERPTR:
|
||
case TYPE_CODE_METHODPTR:
|
||
case TYPE_CODE_METHOD:
|
||
case TYPE_CODE_REF:
|
||
case TYPE_CODE_NAMESPACE:
|
||
error (_("internal error: unhandled type in print_type_scalar"));
|
||
break;
|
||
|
||
default:
|
||
error (_("Invalid type code in symbol table."));
|
||
}
|
||
gdb_flush (stream);
|
||
}
|
||
|
||
/* Dump details of a type specified either directly or indirectly.
|
||
Uses the same sort of type lookup mechanism as ptype_command()
|
||
and whatis_command(). */
|
||
|
||
void
|
||
maintenance_print_type (char *type_name, int from_tty)
|
||
{
|
||
struct value *val;
|
||
struct type *type;
|
||
struct cleanup *old_chain;
|
||
struct expression *expr;
|
||
|
||
if (type_name != NULL)
|
||
{
|
||
expr = parse_expression (type_name);
|
||
old_chain = make_cleanup (free_current_contents, &expr);
|
||
if (expr->elts[0].opcode == OP_TYPE)
|
||
{
|
||
/* The user expression names a type directly, just use that type. */
|
||
type = expr->elts[1].type;
|
||
}
|
||
else
|
||
{
|
||
/* The user expression may name a type indirectly by naming an
|
||
object of that type. Find that indirectly named type. */
|
||
val = evaluate_type (expr);
|
||
type = value_type (val);
|
||
}
|
||
if (type != NULL)
|
||
{
|
||
recursive_dump_type (type, 0);
|
||
}
|
||
do_cleanups (old_chain);
|
||
}
|
||
}
|
||
|
||
|
||
struct cmd_list_element *setprinttypelist;
|
||
|
||
struct cmd_list_element *showprinttypelist;
|
||
|
||
static void
|
||
set_print_type (char *arg, int from_tty)
|
||
{
|
||
printf_unfiltered (
|
||
"\"set print type\" must be followed by the name of a subcommand.\n");
|
||
help_list (setprintlist, "set print type ", all_commands, gdb_stdout);
|
||
}
|
||
|
||
static void
|
||
show_print_type (char *args, int from_tty)
|
||
{
|
||
cmd_show_list (showprinttypelist, from_tty, "");
|
||
}
|
||
|
||
static int print_methods = 1;
|
||
|
||
static void
|
||
set_print_type_methods (char *args, int from_tty, struct cmd_list_element *c)
|
||
{
|
||
default_ptype_flags.print_methods = print_methods;
|
||
}
|
||
|
||
static void
|
||
show_print_type_methods (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Printing of methods defined in a class in %s\n"),
|
||
value);
|
||
}
|
||
|
||
static int print_typedefs = 1;
|
||
|
||
static void
|
||
set_print_type_typedefs (char *args, int from_tty, struct cmd_list_element *c)
|
||
{
|
||
default_ptype_flags.print_typedefs = print_typedefs;
|
||
}
|
||
|
||
static void
|
||
show_print_type_typedefs (struct ui_file *file, int from_tty,
|
||
struct cmd_list_element *c, const char *value)
|
||
{
|
||
fprintf_filtered (file, _("Printing of typedefs defined in a class in %s\n"),
|
||
value);
|
||
}
|
||
|
||
void
|
||
_initialize_typeprint (void)
|
||
{
|
||
struct cmd_list_element *c;
|
||
|
||
c = add_com ("ptype", class_vars, ptype_command, _("\
|
||
Print definition of type TYPE.\n\
|
||
Usage: ptype[/FLAGS] TYPE | EXPRESSION\n\
|
||
Argument may be any type (for example a type name defined by typedef,\n\
|
||
or \"struct STRUCT-TAG\" or \"class CLASS-NAME\" or \"union UNION-TAG\"\n\
|
||
or \"enum ENUM-TAG\") or an expression.\n\
|
||
The selected stack frame's lexical context is used to look up the name.\n\
|
||
Contrary to \"whatis\", \"ptype\" always unrolls any typedefs.\n\
|
||
\n\
|
||
Available FLAGS are:\n\
|
||
/r print in \"raw\" form; do not substitute typedefs\n\
|
||
/m do not print methods defined in a class\n\
|
||
/M print methods defined in a class\n\
|
||
/t do not print typedefs defined in a class\n\
|
||
/T print typedefs defined in a class"));
|
||
set_cmd_completer (c, expression_completer);
|
||
|
||
c = add_com ("whatis", class_vars, whatis_command,
|
||
_("Print data type of expression EXP.\n\
|
||
Only one level of typedefs is unrolled. See also \"ptype\"."));
|
||
set_cmd_completer (c, expression_completer);
|
||
|
||
add_prefix_cmd ("type", no_class, show_print_type,
|
||
_("Generic command for showing type-printing settings."),
|
||
&showprinttypelist, "show print type ", 0, &showprintlist);
|
||
add_prefix_cmd ("type", no_class, set_print_type,
|
||
_("Generic command for setting how types print."),
|
||
&setprinttypelist, "show print type ", 0, &setprintlist);
|
||
|
||
add_setshow_boolean_cmd ("methods", no_class, &print_methods,
|
||
_("\
|
||
Set printing of methods defined in classes."), _("\
|
||
Show printing of methods defined in classes."), NULL,
|
||
set_print_type_methods,
|
||
show_print_type_methods,
|
||
&setprinttypelist, &showprinttypelist);
|
||
add_setshow_boolean_cmd ("typedefs", no_class, &print_typedefs,
|
||
_("\
|
||
Set printing of typedefs defined in classes."), _("\
|
||
Show printing of typedefs defined in classes."), NULL,
|
||
set_print_type_typedefs,
|
||
show_print_type_typedefs,
|
||
&setprinttypelist, &showprinttypelist);
|
||
}
|