/* Support for printing C++ values for GDB, the GNU debugger.
- Copyright 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996,
- 1997, 2000, 2001, 2002, 2003, 2005 Free Software Foundation, Inc.
+ Copyright (C) 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
+ 2000, 2001, 2002, 2003, 2005, 2006, 2007 Free Software Foundation, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
#include "gdb_obstack.h"
struct ui_file *, int, int,
enum val_prettyprint);
-static void cp_print_value (struct type *, struct type *, const bfd_byte *,
+static void cp_print_value (struct type *, struct type *, const gdb_byte *,
int, CORE_ADDR, struct ui_file *, int, int,
enum val_prettyprint, struct type **);
enum val_prettyprint);
-void
-cp_print_class_method (const bfd_byte *valaddr,
- struct type *type,
- struct ui_file *stream)
-{
- struct type *domain;
- struct fn_field *f = NULL;
- int j = 0;
- int len2;
- int offset;
- char *kind = "";
- CORE_ADDR addr;
- struct symbol *sym;
- unsigned len;
- unsigned int i;
- struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
-
- domain = TYPE_DOMAIN_TYPE (target_type);
- if (domain == (struct type *) NULL)
- {
- fprintf_filtered (stream, "<unknown>");
- return;
- }
- addr = unpack_pointer (type, valaddr);
- if (METHOD_PTR_IS_VIRTUAL (addr))
- {
- offset = METHOD_PTR_TO_VOFFSET (addr);
- len = TYPE_NFN_FIELDS (domain);
- for (i = 0; i < len; i++)
- {
- f = TYPE_FN_FIELDLIST1 (domain, i);
- len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
-
- check_stub_method_group (domain, i);
- for (j = 0; j < len2; j++)
- {
- if (TYPE_FN_FIELD_VOFFSET (f, j) == offset)
- {
- kind = "virtual ";
- goto common;
- }
- }
- }
- }
- else
- {
- sym = find_pc_function (addr);
- if (sym == 0)
- {
- /* 1997-08-01 Currently unsupported with HP aCC */
- if (deprecated_hp_som_som_object_present)
- {
- fputs_filtered ("?? <not supported with HP aCC>", stream);
- return;
- }
- error (_("invalid pointer to member function"));
- }
- len = TYPE_NFN_FIELDS (domain);
- for (i = 0; i < len; i++)
- {
- f = TYPE_FN_FIELDLIST1 (domain, i);
- len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
-
- check_stub_method_group (domain, i);
- for (j = 0; j < len2; j++)
- {
- if (strcmp (DEPRECATED_SYMBOL_NAME (sym), TYPE_FN_FIELD_PHYSNAME (f, j))
- == 0)
- goto common;
- }
- }
- }
- common:
- if (i < len)
- {
- char *demangled_name;
-
- fprintf_filtered (stream, "&");
- fputs_filtered (kind, stream);
- demangled_name = cplus_demangle (TYPE_FN_FIELD_PHYSNAME (f, j),
- DMGL_ANSI | DMGL_PARAMS);
- if (demangled_name == NULL)
- fprintf_filtered (stream, "<badly mangled name %s>",
- TYPE_FN_FIELD_PHYSNAME (f, j));
- else
- {
- fputs_filtered (demangled_name, stream);
- xfree (demangled_name);
- }
- }
- else
- {
- fprintf_filtered (stream, "(");
- type_print (type, "", stream, -1);
- fprintf_filtered (stream, ") %d", (int) addr >> 3);
- }
-}
-
/* GCC versions after 2.4.5 use this. */
const char vtbl_ptr_name[] = "__vtbl_ptr_type";
void
cp_print_value_fields (struct type *type, struct type *real_type,
- const bfd_byte *valaddr, int offset, CORE_ADDR address,
+ const gdb_byte *valaddr, int offset, CORE_ADDR address,
struct ui_file *stream, int format, int recurse,
enum val_prettyprint pretty,
struct type **dont_print_vb,int dont_print_statmem)
{
int i, len, n_baseclasses;
- struct obstack tmp_obstack;
char *last_dont_print = obstack_next_free (&dont_print_statmem_obstack);
int fields_seen = 0;
fprintf_filtered (stream, "<No data fields>");
else
{
+ struct obstack tmp_obstack = dont_print_statmem_obstack;
+
if (dont_print_statmem == 0)
{
/* If we're at top level, carve out a completely fresh
chunk of the obstack and use that until this particular
invocation returns. */
- tmp_obstack = dont_print_statmem_obstack;
obstack_finish (&dont_print_statmem_obstack);
}
(TYPE_FIELD_TYPE (type, i),
unpack_field_as_long (type, valaddr + offset, i));
- val_print (TYPE_FIELD_TYPE (type, i), value_contents (v),
- 0, 0, stream, format, 0, recurse + 1, pretty);
+ common_val_print (v, stream, format, 0, recurse + 1, pretty);
}
}
else
v = value_from_pointer (lookup_pointer_type (builtin_type_unsigned_long),
*(unsigned long *) (valaddr + offset));
- val_print (value_type (v), value_contents (v), 0, 0,
- stream, format, 0, recurse + 1, pretty);
+ common_val_print (v, stream, format, 0, recurse + 1, pretty);
fields_seen = 1;
if (vtblprint)
static void
cp_print_value (struct type *type, struct type *real_type,
- const bfd_byte *valaddr, int offset, CORE_ADDR address,
+ const gdb_byte *valaddr, int offset, CORE_ADDR address,
struct ui_file *stream, int format, int recurse,
enum val_prettyprint pretty, struct type **dont_print_vb)
{
- struct obstack tmp_obstack;
struct type **last_dont_print
= (struct type **) obstack_next_free (&dont_print_vb_obstack);
+ struct obstack tmp_obstack = dont_print_vb_obstack;
int i, n_baseclasses = TYPE_N_BASECLASSES (type);
int thisoffset;
struct type *thistype;
/* If we're at top level, carve out a completely fresh
chunk of the obstack and use that until this particular
invocation returns. */
- tmp_obstack = dont_print_vb_obstack;
/* Bump up the high-water mark. Now alpha is omega. */
obstack_finish (&dont_print_vb_obstack);
}
int skip;
struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
char *basename = TYPE_NAME (baseclass);
- const bfd_byte *base_valaddr;
+ const gdb_byte *base_valaddr;
if (BASETYPE_VIA_VIRTUAL (type, i))
{
|| (boffset + offset) >= TYPE_LENGTH (type)))
{
/* FIXME (alloca): unsafe if baseclass is really really large. */
- bfd_byte *buf = alloca (TYPE_LENGTH (baseclass));
+ gdb_byte *buf = alloca (TYPE_LENGTH (baseclass));
base_valaddr = buf;
if (target_read_memory (address + boffset, buf,
TYPE_LENGTH (baseclass)) != 0)
stream, format, 0, recurse, pretty);
}
+
+/* Find the field in *DOMAIN, or its non-virtual base classes, with bit offset
+ OFFSET. Set *DOMAIN to the containing type and *FIELDNO to the containing
+ field number. If OFFSET is not exactly at the start of some field, set
+ *DOMAIN to NULL. */
+
void
-cp_print_class_member (const bfd_byte *valaddr, struct type *domain,
- struct ui_file *stream, char *prefix)
+cp_find_class_member (struct type **domain_p, int *fieldno,
+ LONGEST offset)
{
-
- /* VAL is a byte offset into the structure type DOMAIN.
- Find the name of the field for that offset and
- print it. */
- int extra = 0;
- int bits = 0;
+ struct type *domain;
unsigned int i;
- unsigned len = TYPE_NFIELDS (domain);
-
- /* @@ Make VAL into bit offset */
-
- /* Note: HP aCC generates offsets that are the real byte offsets added
- to a constant bias 0x20000000 (1 << 29). This constant bias gets
- shifted out in the code below -- joyous happenstance! */
+ unsigned len;
- /* Note: HP cfront uses a constant bias of 1; if we support this
- compiler ever, we will have to adjust the computation below */
+ *domain_p = check_typedef (*domain_p);
+ domain = *domain_p;
+ len = TYPE_NFIELDS (domain);
- LONGEST val = unpack_long (builtin_type_int, valaddr) << 3;
for (i = TYPE_N_BASECLASSES (domain); i < len; i++)
{
- int bitpos = TYPE_FIELD_BITPOS (domain, i);
+ LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i);
+
QUIT;
- if (val == bitpos)
- break;
- if (val < bitpos && i != 0)
+ if (offset == bitpos)
{
- /* Somehow pointing into a field. */
- i -= 1;
- extra = (val - TYPE_FIELD_BITPOS (domain, i));
- if (extra & 0x7)
- bits = 1;
- else
- extra >>= 3;
- break;
+ *fieldno = i;
+ return;
}
}
- if (i < len)
+
+ for (i = 0; i < TYPE_N_BASECLASSES (domain); i++)
+ {
+ LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i);
+ LONGEST bitsize = 8 * TYPE_LENGTH (TYPE_FIELD_TYPE (domain, i));
+
+ if (offset >= bitpos && offset < bitpos + bitsize)
+ {
+ *domain_p = TYPE_FIELD_TYPE (domain, i);
+ cp_find_class_member (domain_p, fieldno, offset - bitpos);
+ return;
+ }
+ }
+
+ *domain_p = NULL;
+}
+
+void
+cp_print_class_member (const gdb_byte *valaddr, struct type *domain,
+ struct ui_file *stream, char *prefix)
+{
+ /* VAL is a byte offset into the structure type DOMAIN.
+ Find the name of the field for that offset and
+ print it. */
+ unsigned int fieldno;
+
+ LONGEST val = unpack_long (builtin_type_long, valaddr);
+
+ /* Pointers to data members are usually byte offsets into an object.
+ Because a data member can have offset zero, and a NULL pointer to
+ member must be distinct from any valid non-NULL pointer to
+ member, either the value is biased or the NULL value has a
+ special representation; both are permitted by ISO C++. HP aCC
+ used a bias of 0x20000000; HP cfront used a bias of 1; g++ 3.x
+ and other compilers which use the Itanium ABI use -1 as the NULL
+ value. GDB only supports that last form; to add support for
+ another form, make this into a cp-abi hook. */
+
+ if (val == -1)
+ {
+ fprintf_filtered (stream, "NULL");
+ return;
+ }
+
+ cp_find_class_member (&domain, &fieldno, val << 3);
+
+ if (domain != NULL)
{
char *name;
fputs_filtered (prefix, stream);
else
c_type_print_base (domain, stream, 0, 0);
fprintf_filtered (stream, "::");
- fputs_filtered (TYPE_FIELD_NAME (domain, i), stream);
- if (extra)
- fprintf_filtered (stream, " + %d bytes", extra);
- if (bits)
- fprintf_filtered (stream, " (offset in bits)");
+ fputs_filtered (TYPE_FIELD_NAME (domain, fieldno), stream);
}
else
- fprintf_filtered (stream, "%ld", (long) (val >> 3));
+ fprintf_filtered (stream, "%ld", (long) val);
}
deprecated_set_value_type (vf, value_type (v));
/* print out the entry */
- val_print (value_type (vf), value_contents (vf), 0, 0,
- stream, format, 0, recurse + 1, pretty);
+ common_val_print (vf, stream, format, 0, recurse + 1, pretty);
field_physname
= TYPE_FN_FIELD_PHYSNAME (TYPE_FN_FIELDLIST1 (type, fn), oi);
/* pai: (temp) FIXME Maybe this should be DMGL_ANSI */