/* Support routines for manipulating internal types for GDB.
Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001, 2002,
- 2003, 2004, 2006 Free Software Foundation, Inc.
+ 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
Contributed by Cygnus Support, using pieces from other GDB modules.
#include "wrapper.h"
#include "cp-abi.h"
#include "gdb_assert.h"
+#include "hashtab.h"
/* These variables point to the objects
representing the predefined C data types. */
obstack_free (&dont_print_type_obstack, NULL);
}
-static void build_gdbtypes (void);
+/* Trivial helpers for the libiberty hash table, for mapping one
+ type to another. */
+
+struct type_pair
+{
+ struct type *old, *new;
+};
+
+static hashval_t
+type_pair_hash (const void *item)
+{
+ const struct type_pair *pair = item;
+ return htab_hash_pointer (pair->old);
+}
+
+static int
+type_pair_eq (const void *item_lhs, const void *item_rhs)
+{
+ const struct type_pair *lhs = item_lhs, *rhs = item_rhs;
+ return lhs->old == rhs->old;
+}
+
+/* Allocate the hash table used by copy_type_recursive to walk
+ types without duplicates. We use OBJFILE's obstack, because
+ OBJFILE is about to be deleted. */
+
+htab_t
+create_copied_types_hash (struct objfile *objfile)
+{
+ return htab_create_alloc_ex (1, type_pair_hash, type_pair_eq,
+ NULL, &objfile->objfile_obstack,
+ hashtab_obstack_allocate,
+ dummy_obstack_deallocate);
+}
+
+/* Recursively copy (deep copy) TYPE, if it is associated with OBJFILE.
+ Return a new type allocated using malloc, a saved type if we have already
+ visited TYPE (using COPIED_TYPES), or TYPE if it is not associated with
+ OBJFILE. */
+
+struct type *
+copy_type_recursive (struct objfile *objfile, struct type *type,
+ htab_t copied_types)
+{
+ struct type_pair *stored, pair;
+ void **slot;
+ struct type *new_type;
+
+ if (TYPE_OBJFILE (type) == NULL)
+ return type;
+
+ /* This type shouldn't be pointing to any types in other objfiles; if
+ it did, the type might disappear unexpectedly. */
+ gdb_assert (TYPE_OBJFILE (type) == objfile);
+
+ pair.old = type;
+ slot = htab_find_slot (copied_types, &pair, INSERT);
+ if (*slot != NULL)
+ return ((struct type_pair *) *slot)->new;
+
+ new_type = alloc_type (NULL);
+
+ /* We must add the new type to the hash table immediately, in case
+ we encounter this type again during a recursive call below. */
+ stored = xmalloc (sizeof (struct type_pair));
+ stored->old = type;
+ stored->new = new_type;
+ *slot = stored;
+
+ /* Copy the common fields of types. */
+ TYPE_CODE (new_type) = TYPE_CODE (type);
+ TYPE_ARRAY_UPPER_BOUND_TYPE (new_type) = TYPE_ARRAY_UPPER_BOUND_TYPE (type);
+ TYPE_ARRAY_LOWER_BOUND_TYPE (new_type) = TYPE_ARRAY_LOWER_BOUND_TYPE (type);
+ if (TYPE_NAME (type))
+ TYPE_NAME (new_type) = xstrdup (TYPE_NAME (type));
+ if (TYPE_TAG_NAME (type))
+ TYPE_TAG_NAME (new_type) = xstrdup (TYPE_TAG_NAME (type));
+ TYPE_FLAGS (new_type) = TYPE_FLAGS (type);
+ TYPE_VPTR_FIELDNO (new_type) = TYPE_VPTR_FIELDNO (type);
+
+ TYPE_INSTANCE_FLAGS (new_type) = TYPE_INSTANCE_FLAGS (type);
+ TYPE_LENGTH (new_type) = TYPE_LENGTH (type);
+
+ /* Copy the fields. */
+ TYPE_NFIELDS (new_type) = TYPE_NFIELDS (type);
+ if (TYPE_NFIELDS (type))
+ {
+ int i, nfields;
+
+ nfields = TYPE_NFIELDS (type);
+ TYPE_FIELDS (new_type) = xmalloc (sizeof (struct field) * nfields);
+ for (i = 0; i < nfields; i++)
+ {
+ TYPE_FIELD_ARTIFICIAL (new_type, i) = TYPE_FIELD_ARTIFICIAL (type, i);
+ TYPE_FIELD_BITSIZE (new_type, i) = TYPE_FIELD_BITSIZE (type, i);
+ if (TYPE_FIELD_TYPE (type, i))
+ TYPE_FIELD_TYPE (new_type, i)
+ = copy_type_recursive (objfile, TYPE_FIELD_TYPE (type, i),
+ copied_types);
+ if (TYPE_FIELD_NAME (type, i))
+ TYPE_FIELD_NAME (new_type, i) = xstrdup (TYPE_FIELD_NAME (type, i));
+ if (TYPE_FIELD_STATIC_HAS_ADDR (type, i))
+ SET_FIELD_PHYSADDR (TYPE_FIELD (new_type, i),
+ TYPE_FIELD_STATIC_PHYSADDR (type, i));
+ else if (TYPE_FIELD_STATIC (type, i))
+ SET_FIELD_PHYSNAME (TYPE_FIELD (new_type, i),
+ xstrdup (TYPE_FIELD_STATIC_PHYSNAME (type, i)));
+ else
+ {
+ TYPE_FIELD_BITPOS (new_type, i) = TYPE_FIELD_BITPOS (type, i);
+ TYPE_FIELD_STATIC_KIND (new_type, i) = 0;
+ }
+ }
+ }
+
+ /* Copy pointers to other types. */
+ if (TYPE_TARGET_TYPE (type))
+ TYPE_TARGET_TYPE (new_type) = copy_type_recursive (objfile,
+ TYPE_TARGET_TYPE (type),
+ copied_types);
+ if (TYPE_VPTR_BASETYPE (type))
+ TYPE_VPTR_BASETYPE (new_type) = copy_type_recursive (objfile,
+ TYPE_VPTR_BASETYPE (type),
+ copied_types);
+ /* Maybe copy the type_specific bits.
+
+ NOTE drow/2005-12-09: We do not copy the C++-specific bits like
+ base classes and methods. There's no fundamental reason why we
+ can't, but at the moment it is not needed. */
+
+ if (TYPE_CODE (type) == TYPE_CODE_FLT)
+ TYPE_FLOATFORMAT (new_type) == TYPE_FLOATFORMAT (type);
+ else if (TYPE_CODE (type) == TYPE_CODE_STRUCT
+ || TYPE_CODE (type) == TYPE_CODE_UNION
+ || TYPE_CODE (type) == TYPE_CODE_TEMPLATE
+ || TYPE_CODE (type) == TYPE_CODE_NAMESPACE)
+ INIT_CPLUS_SPECIFIC (new_type);
+
+ return new_type;
+}
+
static void
build_gdbtypes (void)
{
projects / deliverable / binutils-gdb.git / blobdiff