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 "symtab.h"
return NULL;
}
-
-/* Return the offset (in bytes) of the virtual base of type BASETYPE
- * in an object pointed to by VALADDR (on the host), assumed to be of
- * type TYPE. OFFSET is number of bytes beyond start of ARG to start
- * looking (in case VALADDR is the contents of an enclosing object).
- *
- * This routine recurses on the primary base of the derived class
- * because the virtual base entries of the primary base appear before
- * the other virtual base entries.
- *
- * If the virtual base is not found, a negative integer is returned.
- * The magnitude of the negative integer is the number of entries in
- * the virtual table to skip over (entries corresponding to various
- * ancestral classes in the chain of primary bases).
- *
- * Important: This assumes the HP / Taligent C++ runtime conventions.
- * Use baseclass_offset() instead to deal with g++ conventions. */
-
-void
-find_rt_vbase_offset (struct type *type, struct type *basetype,
- const gdb_byte *valaddr, int offset,
- int *boffset_p, int *skip_p)
-{
- int boffset; /* Offset of virtual base. */
- int index; /* Displacement to use in virtual
- table. */
- int skip;
-
- struct value *vp;
- CORE_ADDR vtbl; /* The virtual table pointer. */
- struct type *pbc; /* The primary base class. */
-
- /* Look for the virtual base recursively in the primary base, first.
- * This is because the derived class object and its primary base
- * subobject share the primary virtual table. */
-
- boffset = 0;
- pbc = TYPE_PRIMARY_BASE (type);
- if (pbc)
- {
- find_rt_vbase_offset (pbc, basetype, valaddr,
- offset, &boffset, &skip);
- if (skip < 0)
- {
- *boffset_p = boffset;
- *skip_p = -1;
- return;
- }
- }
- else
- skip = 0;
-
-
- /* Find the index of the virtual base according to HP/Taligent
- runtime spec. (Depth-first, left-to-right.) */
- index = virtual_base_index_skip_primaries (basetype, type);
-
- if (index < 0)
- {
- *skip_p = skip + virtual_base_list_length_skip_primaries (type);
- *boffset_p = 0;
- return;
- }
-
- /* pai: FIXME -- 32x64 possible problem. */
- /* First word (4 bytes) in object layout is the vtable pointer. */
- vtbl = *(CORE_ADDR *) (valaddr + offset);
-
- /* Before the constructor is invoked, things are usually zero'd
- out. */
- if (vtbl == 0)
- error (_("Couldn't find virtual table -- object may not be constructed yet."));
-
-
- /* Find virtual base's offset -- jump over entries for primary base
- * ancestors, then use the index computed above. But also adjust by
- * HP_ACC_VBASE_START for the vtable slots before the start of the
- * virtual base entries. Offset is negative -- virtual base entries
- * appear _before_ the address point of the virtual table. */
-
- /* pai: FIXME -- 32x64 problem, if word = 8 bytes, change multiplier
- & use long type */
-
- /* epstein : FIXME -- added param for overlay section. May not be
- correct. */
- vp = value_at (builtin_type_int,
- vtbl + 4 * (-skip - index - HP_ACC_VBASE_START));
- boffset = value_as_long (vp);
- *skip_p = -1;
- *boffset_p = boffset;
- return;
-}
-
-
/* Helper function used by value_struct_elt to recurse through
baseclasses. Look for a field NAME in ARG1. Adjust the address of
ARG1 by OFFSET bytes, and search in it assuming it has (class) type
if (BASETYPE_VIA_VIRTUAL (type, i))
{
- if (TYPE_HAS_VTABLE (type))
- {
- /* HP aCC compiled type, search for virtual base offset
- according to HP/Taligent runtime spec. */
- int skip;
- find_rt_vbase_offset (type, TYPE_BASECLASS (type, i),
- value_contents_all (*arg1p),
- offset + value_embedded_offset (*arg1p),
- &base_offset, &skip);
- if (skip >= 0)
- error (_("Virtual base class offset not found in vtable"));
- }
- else
- {
- struct type *baseclass =
- check_typedef (TYPE_BASECLASS (type, i));
- const gdb_byte *base_valaddr;
+ struct type *baseclass = check_typedef (TYPE_BASECLASS (type, i));
+ const gdb_byte *base_valaddr;
- /* The virtual base class pointer might have been
- clobbered by the user program. Make sure that it
- still points to a valid memory location. */
+ /* The virtual base class pointer might have been
+ clobbered by the user program. Make sure that it
+ still points to a valid memory location. */
- if (offset < 0 || offset >= TYPE_LENGTH (type))
- {
- gdb_byte *tmp = alloca (TYPE_LENGTH (baseclass));
- if (target_read_memory (VALUE_ADDRESS (*arg1p)
- + value_offset (*arg1p) + offset,
- tmp, TYPE_LENGTH (baseclass)) != 0)
- error (_("virtual baseclass botch"));
- base_valaddr = tmp;
- }
- else
- base_valaddr = value_contents (*arg1p) + offset;
-
- base_offset =
- baseclass_offset (type, i, base_valaddr,
- VALUE_ADDRESS (*arg1p)
- + value_offset (*arg1p) + offset);
- if (base_offset == -1)
+ if (offset < 0 || offset >= TYPE_LENGTH (type))
+ {
+ gdb_byte *tmp = alloca (TYPE_LENGTH (baseclass));
+ if (target_read_memory (VALUE_ADDRESS (*arg1p)
+ + value_offset (*arg1p) + offset,
+ tmp, TYPE_LENGTH (baseclass)) != 0)
error (_("virtual baseclass botch"));
+ base_valaddr = tmp;
}
+ else
+ base_valaddr = value_contents (*arg1p) + offset;
+
+ base_offset = baseclass_offset (type, i, base_valaddr,
+ VALUE_ADDRESS (*arg1p)
+ + value_offset (*arg1p) + offset);
+ if (base_offset == -1)
+ error (_("virtual baseclass botch"));
}
else
{
int base_offset;
if (BASETYPE_VIA_VIRTUAL (type, i))
{
- if (TYPE_HAS_VTABLE (type))
- {
- /* HP aCC compiled type, search for virtual base offset
- * according to HP/Taligent runtime spec. */
- int skip;
- find_rt_vbase_offset (type, TYPE_BASECLASS (type, i),
- value_contents_all (*argp),
- offset + value_embedded_offset (*argp),
- &base_offset, &skip);
- if (skip >= 0)
- error (_("Virtual base class offset not found in vtable"));
- }
- else
- {
- /* probably g++ runtime model */
- base_offset = value_offset (*argp) + offset;
- base_offset =
- baseclass_offset (type, i,
- value_contents (*argp) + base_offset,
- VALUE_ADDRESS (*argp) + base_offset);
- if (base_offset == -1)
- error (_("virtual baseclass botch"));
- }
+ base_offset = value_offset (*argp) + offset;
+ base_offset = baseclass_offset (type, i,
+ value_contents (*argp) + base_offset,
+ VALUE_ADDRESS (*argp) + base_offset);
+ if (base_offset == -1)
+ error (_("virtual baseclass botch"));
}
else /* Non-virtual base, simply use bit position from debug
info. */
projects / deliverable / binutils-gdb.git / blobdiff