/* Support for printing C++ values for GDB, the GNU debugger.
- Copyright (C) 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.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdb_obstack.h"
enum val_prettyprint);
-void
-cp_print_class_method (const gdb_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";
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);
}
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);
}
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_find_class_member (struct type **domain_p, int *fieldno,
+ LONGEST offset)
+{
+ struct type *domain;
+ unsigned int i;
+ unsigned len;
+
+ *domain_p = check_typedef (*domain_p);
+ domain = *domain_p;
+ len = TYPE_NFIELDS (domain);
+
+ for (i = TYPE_N_BASECLASSES (domain); i < len; i++)
+ {
+ LONGEST bitpos = TYPE_FIELD_BITPOS (domain, i);
+
+ QUIT;
+ if (offset == bitpos)
+ {
+ *fieldno = i;
+ return;
+ }
+ }
+
+ 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. */
- int extra = 0;
- int bits = 0;
- unsigned int i;
- unsigned len = TYPE_NFIELDS (domain);
+ unsigned int fieldno;
- /* @@ Make VAL into bit offset */
+ LONGEST val = unpack_long (builtin_type_long, valaddr);
- /* 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! */
+ /* 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. */
- /* Note: HP cfront uses a constant bias of 1; if we support this
- compiler ever, we will have to adjust the computation below */
-
- LONGEST val = unpack_long (builtin_type_int, valaddr) << 3;
- for (i = TYPE_N_BASECLASSES (domain); i < len; i++)
+ if (val == -1)
{
- int bitpos = TYPE_FIELD_BITPOS (domain, i);
- QUIT;
- if (val == bitpos)
- break;
- if (val < bitpos && i != 0)
- {
- /* Somehow pointing into a field. */
- i -= 1;
- extra = (val - TYPE_FIELD_BITPOS (domain, i));
- if (extra & 0x7)
- bits = 1;
- else
- extra >>= 3;
- break;
- }
+ fprintf_filtered (stream, "NULL");
+ return;
}
- if (i < len)
+
+ 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);
}
/* pai: (temp) FIXME Maybe this should be DMGL_ANSI */
vf_name = cplus_demangle (field_physname, DMGL_ARM);
fprintf_filtered (stream, " %s", vf_name);
+ xfree (vf_name);
if (--(*vfuncs) > 0)
fputs_filtered (", ", stream);
}
projects / deliverable / binutils-gdb.git / blobdiff