/* Abstraction of GNU v2 abi.
|
/* Abstraction of GNU v2 abi.
|
|
|
Copyright (C) 2001, 2002, 2003, 2005, 2007, 2008, 2009, 2010
|
Copyright (C) 2001, 2002, 2003, 2005, 2007, 2008, 2009, 2010
|
Free Software Foundation, Inc.
|
Free Software Foundation, Inc.
|
|
|
Contributed by Daniel Berlin <dberlin@redhat.com>
|
Contributed by Daniel Berlin <dberlin@redhat.com>
|
|
|
This file is part of GDB.
|
This file is part of GDB.
|
|
|
This program is free software; you can redistribute it and/or modify
|
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
|
it under the terms of the GNU General Public License as published by
|
the Free Software Foundation; either version 3 of the License, or
|
the Free Software Foundation; either version 3 of the License, or
|
(at your option) any later version.
|
(at your option) any later version.
|
|
|
This program is distributed in the hope that it will be useful,
|
This program is distributed in the hope that it will be useful,
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
GNU General Public License for more details.
|
GNU General Public License for more details.
|
|
|
You should have received a copy of the GNU General Public License
|
You should have received a copy of the GNU General Public License
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
#include "defs.h"
|
#include "defs.h"
|
#include "gdb_string.h"
|
#include "gdb_string.h"
|
#include "symtab.h"
|
#include "symtab.h"
|
#include "gdbtypes.h"
|
#include "gdbtypes.h"
|
#include "value.h"
|
#include "value.h"
|
#include "demangle.h"
|
#include "demangle.h"
|
#include "cp-abi.h"
|
#include "cp-abi.h"
|
#include "cp-support.h"
|
#include "cp-support.h"
|
|
|
#include <ctype.h>
|
#include <ctype.h>
|
|
|
struct cp_abi_ops gnu_v2_abi_ops;
|
struct cp_abi_ops gnu_v2_abi_ops;
|
|
|
static int vb_match (struct type *, int, struct type *);
|
static int vb_match (struct type *, int, struct type *);
|
|
|
static enum dtor_kinds
|
static enum dtor_kinds
|
gnuv2_is_destructor_name (const char *name)
|
gnuv2_is_destructor_name (const char *name)
|
{
|
{
|
if ((name[0] == '_' && is_cplus_marker (name[1]) && name[2] == '_')
|
if ((name[0] == '_' && is_cplus_marker (name[1]) && name[2] == '_')
|
|| strncmp (name, "__dt__", 6) == 0)
|
|| strncmp (name, "__dt__", 6) == 0)
|
return complete_object_dtor;
|
return complete_object_dtor;
|
else
|
else
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static enum ctor_kinds
|
static enum ctor_kinds
|
gnuv2_is_constructor_name (const char *name)
|
gnuv2_is_constructor_name (const char *name)
|
{
|
{
|
if ((name[0] == '_' && name[1] == '_'
|
if ((name[0] == '_' && name[1] == '_'
|
&& (isdigit (name[2]) || strchr ("Qt", name[2])))
|
&& (isdigit (name[2]) || strchr ("Qt", name[2])))
|
|| strncmp (name, "__ct__", 6) == 0)
|
|| strncmp (name, "__ct__", 6) == 0)
|
return complete_object_ctor;
|
return complete_object_ctor;
|
else
|
else
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static int
|
static int
|
gnuv2_is_vtable_name (const char *name)
|
gnuv2_is_vtable_name (const char *name)
|
{
|
{
|
return (((name)[0] == '_'
|
return (((name)[0] == '_'
|
&& (((name)[1] == 'V' && (name)[2] == 'T')
|
&& (((name)[1] == 'V' && (name)[2] == 'T')
|
|| ((name)[1] == 'v' && (name)[2] == 't'))
|
|| ((name)[1] == 'v' && (name)[2] == 't'))
|
&& is_cplus_marker ((name)[3])) ||
|
&& is_cplus_marker ((name)[3])) ||
|
((name)[0] == '_' && (name)[1] == '_'
|
((name)[0] == '_' && (name)[1] == '_'
|
&& (name)[2] == 'v' && (name)[3] == 't' && (name)[4] == '_'));
|
&& (name)[2] == 'v' && (name)[3] == 't' && (name)[4] == '_'));
|
}
|
}
|
|
|
static int
|
static int
|
gnuv2_is_operator_name (const char *name)
|
gnuv2_is_operator_name (const char *name)
|
{
|
{
|
return strncmp (name, "operator", 8) == 0;
|
return strncmp (name, "operator", 8) == 0;
|
}
|
}
|
|
|
|
|
/* Return a virtual function as a value.
|
/* Return a virtual function as a value.
|
ARG1 is the object which provides the virtual function
|
ARG1 is the object which provides the virtual function
|
table pointer. *ARG1P is side-effected in calling this function.
|
table pointer. *ARG1P is side-effected in calling this function.
|
F is the list of member functions which contains the desired virtual
|
F is the list of member functions which contains the desired virtual
|
function.
|
function.
|
J is an index into F which provides the desired virtual function.
|
J is an index into F which provides the desired virtual function.
|
|
|
TYPE is the type in which F is located. */
|
TYPE is the type in which F is located. */
|
static struct value *
|
static struct value *
|
gnuv2_virtual_fn_field (struct value **arg1p, struct fn_field * f, int j,
|
gnuv2_virtual_fn_field (struct value **arg1p, struct fn_field * f, int j,
|
struct type * type, int offset)
|
struct type * type, int offset)
|
{
|
{
|
struct value *arg1 = *arg1p;
|
struct value *arg1 = *arg1p;
|
struct type *type1 = check_typedef (value_type (arg1));
|
struct type *type1 = check_typedef (value_type (arg1));
|
struct type *entry_type;
|
struct type *entry_type;
|
/* First, get the virtual function table pointer. That comes
|
/* First, get the virtual function table pointer. That comes
|
with a strange type, so cast it to type `pointer to long' (which
|
with a strange type, so cast it to type `pointer to long' (which
|
should serve just fine as a function type). Then, index into
|
should serve just fine as a function type). Then, index into
|
the table, and convert final value to appropriate function type. */
|
the table, and convert final value to appropriate function type. */
|
struct value *entry;
|
struct value *entry;
|
struct value *vfn;
|
struct value *vfn;
|
struct value *vtbl;
|
struct value *vtbl;
|
LONGEST vi = (LONGEST) TYPE_FN_FIELD_VOFFSET (f, j);
|
LONGEST vi = (LONGEST) TYPE_FN_FIELD_VOFFSET (f, j);
|
struct type *fcontext = TYPE_FN_FIELD_FCONTEXT (f, j);
|
struct type *fcontext = TYPE_FN_FIELD_FCONTEXT (f, j);
|
struct type *context;
|
struct type *context;
|
struct type *context_vptr_basetype;
|
struct type *context_vptr_basetype;
|
int context_vptr_fieldno;
|
int context_vptr_fieldno;
|
|
|
if (fcontext == NULL)
|
if (fcontext == NULL)
|
/* We don't have an fcontext (e.g. the program was compiled with
|
/* We don't have an fcontext (e.g. the program was compiled with
|
g++ version 1). Try to get the vtbl from the TYPE_VPTR_BASETYPE.
|
g++ version 1). Try to get the vtbl from the TYPE_VPTR_BASETYPE.
|
This won't work right for multiple inheritance, but at least we
|
This won't work right for multiple inheritance, but at least we
|
should do as well as GDB 3.x did. */
|
should do as well as GDB 3.x did. */
|
fcontext = TYPE_VPTR_BASETYPE (type);
|
fcontext = TYPE_VPTR_BASETYPE (type);
|
context = lookup_pointer_type (fcontext);
|
context = lookup_pointer_type (fcontext);
|
/* Now context is a pointer to the basetype containing the vtbl. */
|
/* Now context is a pointer to the basetype containing the vtbl. */
|
if (TYPE_TARGET_TYPE (context) != type1)
|
if (TYPE_TARGET_TYPE (context) != type1)
|
{
|
{
|
struct value *tmp = value_cast (context, value_addr (arg1));
|
struct value *tmp = value_cast (context, value_addr (arg1));
|
arg1 = value_ind (tmp);
|
arg1 = value_ind (tmp);
|
type1 = check_typedef (value_type (arg1));
|
type1 = check_typedef (value_type (arg1));
|
}
|
}
|
|
|
context = type1;
|
context = type1;
|
/* Now context is the basetype containing the vtbl. */
|
/* Now context is the basetype containing the vtbl. */
|
|
|
/* This type may have been defined before its virtual function table
|
/* This type may have been defined before its virtual function table
|
was. If so, fill in the virtual function table entry for the
|
was. If so, fill in the virtual function table entry for the
|
type now. */
|
type now. */
|
context_vptr_fieldno = get_vptr_fieldno (context, &context_vptr_basetype);
|
context_vptr_fieldno = get_vptr_fieldno (context, &context_vptr_basetype);
|
/* FIXME: What to do if vptr_fieldno is still -1? */
|
/* FIXME: What to do if vptr_fieldno is still -1? */
|
|
|
/* The virtual function table is now an array of structures
|
/* The virtual function table is now an array of structures
|
which have the form { int16 offset, delta; void *pfn; }. */
|
which have the form { int16 offset, delta; void *pfn; }. */
|
vtbl = value_primitive_field (arg1, 0, context_vptr_fieldno,
|
vtbl = value_primitive_field (arg1, 0, context_vptr_fieldno,
|
context_vptr_basetype);
|
context_vptr_basetype);
|
|
|
/* With older versions of g++, the vtbl field pointed to an array
|
/* With older versions of g++, the vtbl field pointed to an array
|
of structures. Nowadays it points directly to the structure. */
|
of structures. Nowadays it points directly to the structure. */
|
if (TYPE_CODE (value_type (vtbl)) == TYPE_CODE_PTR
|
if (TYPE_CODE (value_type (vtbl)) == TYPE_CODE_PTR
|
&& TYPE_CODE (TYPE_TARGET_TYPE (value_type (vtbl))) == TYPE_CODE_ARRAY)
|
&& TYPE_CODE (TYPE_TARGET_TYPE (value_type (vtbl))) == TYPE_CODE_ARRAY)
|
{
|
{
|
/* Handle the case where the vtbl field points to an
|
/* Handle the case where the vtbl field points to an
|
array of structures. */
|
array of structures. */
|
vtbl = value_ind (vtbl);
|
vtbl = value_ind (vtbl);
|
|
|
/* Index into the virtual function table. This is hard-coded because
|
/* Index into the virtual function table. This is hard-coded because
|
looking up a field is not cheap, and it may be important to save
|
looking up a field is not cheap, and it may be important to save
|
time, e.g. if the user has set a conditional breakpoint calling
|
time, e.g. if the user has set a conditional breakpoint calling
|
a virtual function. */
|
a virtual function. */
|
entry = value_subscript (vtbl, vi);
|
entry = value_subscript (vtbl, vi);
|
}
|
}
|
else
|
else
|
{
|
{
|
/* Handle the case where the vtbl field points directly to a structure. */
|
/* Handle the case where the vtbl field points directly to a structure. */
|
vtbl = value_ptradd (vtbl, vi);
|
vtbl = value_ptradd (vtbl, vi);
|
entry = value_ind (vtbl);
|
entry = value_ind (vtbl);
|
}
|
}
|
|
|
entry_type = check_typedef (value_type (entry));
|
entry_type = check_typedef (value_type (entry));
|
|
|
if (TYPE_CODE (entry_type) == TYPE_CODE_STRUCT)
|
if (TYPE_CODE (entry_type) == TYPE_CODE_STRUCT)
|
{
|
{
|
/* Move the `this' pointer according to the virtual function table. */
|
/* Move the `this' pointer according to the virtual function table. */
|
set_value_offset (arg1, value_offset (arg1) + value_as_long (value_field (entry, 0)));
|
set_value_offset (arg1, value_offset (arg1) + value_as_long (value_field (entry, 0)));
|
|
|
if (!value_lazy (arg1))
|
if (!value_lazy (arg1))
|
{
|
{
|
set_value_lazy (arg1, 1);
|
set_value_lazy (arg1, 1);
|
value_fetch_lazy (arg1);
|
value_fetch_lazy (arg1);
|
}
|
}
|
|
|
vfn = value_field (entry, 2);
|
vfn = value_field (entry, 2);
|
}
|
}
|
else if (TYPE_CODE (entry_type) == TYPE_CODE_PTR)
|
else if (TYPE_CODE (entry_type) == TYPE_CODE_PTR)
|
vfn = entry;
|
vfn = entry;
|
else
|
else
|
error (_("I'm confused: virtual function table has bad type"));
|
error (_("I'm confused: virtual function table has bad type"));
|
/* Reinstantiate the function pointer with the correct type. */
|
/* Reinstantiate the function pointer with the correct type. */
|
deprecated_set_value_type (vfn, lookup_pointer_type (TYPE_FN_FIELD_TYPE (f, j)));
|
deprecated_set_value_type (vfn, lookup_pointer_type (TYPE_FN_FIELD_TYPE (f, j)));
|
|
|
*arg1p = arg1;
|
*arg1p = arg1;
|
return vfn;
|
return vfn;
|
}
|
}
|
|
|
|
|
static struct type *
|
static struct type *
|
gnuv2_value_rtti_type (struct value *v, int *full, int *top, int *using_enc)
|
gnuv2_value_rtti_type (struct value *v, int *full, int *top, int *using_enc)
|
{
|
{
|
struct type *known_type;
|
struct type *known_type;
|
struct type *rtti_type;
|
struct type *rtti_type;
|
CORE_ADDR coreptr;
|
CORE_ADDR coreptr;
|
struct value *vp;
|
struct value *vp;
|
long top_offset = 0;
|
long top_offset = 0;
|
char rtti_type_name[256];
|
char rtti_type_name[256];
|
CORE_ADDR vtbl;
|
CORE_ADDR vtbl;
|
struct minimal_symbol *minsym;
|
struct minimal_symbol *minsym;
|
struct symbol *sym;
|
struct symbol *sym;
|
char *demangled_name, *p;
|
char *demangled_name, *p;
|
struct type *btype;
|
struct type *btype;
|
struct type *known_type_vptr_basetype;
|
struct type *known_type_vptr_basetype;
|
int known_type_vptr_fieldno;
|
int known_type_vptr_fieldno;
|
|
|
if (full)
|
if (full)
|
*full = 0;
|
*full = 0;
|
if (top)
|
if (top)
|
*top = -1;
|
*top = -1;
|
if (using_enc)
|
if (using_enc)
|
*using_enc = 0;
|
*using_enc = 0;
|
|
|
/* Get declared type */
|
/* Get declared type */
|
known_type = value_type (v);
|
known_type = value_type (v);
|
CHECK_TYPEDEF (known_type);
|
CHECK_TYPEDEF (known_type);
|
/* RTTI works only or class objects */
|
/* RTTI works only or class objects */
|
if (TYPE_CODE (known_type) != TYPE_CODE_CLASS)
|
if (TYPE_CODE (known_type) != TYPE_CODE_CLASS)
|
return NULL;
|
return NULL;
|
|
|
/* Plan on this changing in the future as i get around to setting
|
/* Plan on this changing in the future as i get around to setting
|
the vtables properly for G++ compiled stuff. Also, I'll be using
|
the vtables properly for G++ compiled stuff. Also, I'll be using
|
the type info functions, which are always right. Deal with it
|
the type info functions, which are always right. Deal with it
|
until then. */
|
until then. */
|
|
|
/* Try to get the vptr basetype, fieldno. */
|
/* Try to get the vptr basetype, fieldno. */
|
known_type_vptr_fieldno = get_vptr_fieldno (known_type,
|
known_type_vptr_fieldno = get_vptr_fieldno (known_type,
|
&known_type_vptr_basetype);
|
&known_type_vptr_basetype);
|
|
|
/* If we can't find it, give up. */
|
/* If we can't find it, give up. */
|
if (known_type_vptr_fieldno < 0)
|
if (known_type_vptr_fieldno < 0)
|
return NULL;
|
return NULL;
|
|
|
/* Make sure our basetype and known type match, otherwise, cast
|
/* Make sure our basetype and known type match, otherwise, cast
|
so we can get at the vtable properly.
|
so we can get at the vtable properly.
|
*/
|
*/
|
btype = known_type_vptr_basetype;
|
btype = known_type_vptr_basetype;
|
CHECK_TYPEDEF (btype);
|
CHECK_TYPEDEF (btype);
|
if (btype != known_type )
|
if (btype != known_type )
|
{
|
{
|
v = value_cast (btype, v);
|
v = value_cast (btype, v);
|
if (using_enc)
|
if (using_enc)
|
*using_enc=1;
|
*using_enc=1;
|
}
|
}
|
/*
|
/*
|
We can't use value_ind here, because it would want to use RTTI, and
|
We can't use value_ind here, because it would want to use RTTI, and
|
we'd waste a bunch of time figuring out we already know the type.
|
we'd waste a bunch of time figuring out we already know the type.
|
Besides, we don't care about the type, just the actual pointer
|
Besides, we don't care about the type, just the actual pointer
|
*/
|
*/
|
if (value_address (value_field (v, known_type_vptr_fieldno)) == 0)
|
if (value_address (value_field (v, known_type_vptr_fieldno)) == 0)
|
return NULL;
|
return NULL;
|
|
|
vtbl = value_as_address (value_field (v, known_type_vptr_fieldno));
|
vtbl = value_as_address (value_field (v, known_type_vptr_fieldno));
|
|
|
/* Try to find a symbol that is the vtable */
|
/* Try to find a symbol that is the vtable */
|
minsym=lookup_minimal_symbol_by_pc(vtbl);
|
minsym=lookup_minimal_symbol_by_pc(vtbl);
|
if (minsym==NULL
|
if (minsym==NULL
|
|| (demangled_name=SYMBOL_LINKAGE_NAME (minsym))==NULL
|
|| (demangled_name=SYMBOL_LINKAGE_NAME (minsym))==NULL
|
|| !is_vtable_name (demangled_name))
|
|| !is_vtable_name (demangled_name))
|
return NULL;
|
return NULL;
|
|
|
/* If we just skip the prefix, we get screwed by namespaces */
|
/* If we just skip the prefix, we get screwed by namespaces */
|
demangled_name=cplus_demangle(demangled_name,DMGL_PARAMS|DMGL_ANSI);
|
demangled_name=cplus_demangle(demangled_name,DMGL_PARAMS|DMGL_ANSI);
|
p = strchr (demangled_name, ' ');
|
p = strchr (demangled_name, ' ');
|
if (p)
|
if (p)
|
*p = '\0';
|
*p = '\0';
|
|
|
/* Lookup the type for the name */
|
/* Lookup the type for the name */
|
/* FIXME: chastain/2003-11-26: block=NULL is bogus. See pr gdb/1465. */
|
/* FIXME: chastain/2003-11-26: block=NULL is bogus. See pr gdb/1465. */
|
rtti_type = cp_lookup_rtti_type (demangled_name, NULL);
|
rtti_type = cp_lookup_rtti_type (demangled_name, NULL);
|
if (rtti_type == NULL)
|
if (rtti_type == NULL)
|
return NULL;
|
return NULL;
|
|
|
if (TYPE_N_BASECLASSES(rtti_type) > 1 && full && (*full) != 1)
|
if (TYPE_N_BASECLASSES(rtti_type) > 1 && full && (*full) != 1)
|
{
|
{
|
if (top)
|
if (top)
|
*top=TYPE_BASECLASS_BITPOS(rtti_type,TYPE_VPTR_FIELDNO(rtti_type))/8;
|
*top=TYPE_BASECLASS_BITPOS(rtti_type,TYPE_VPTR_FIELDNO(rtti_type))/8;
|
if (top && ((*top) >0))
|
if (top && ((*top) >0))
|
{
|
{
|
if (TYPE_LENGTH(rtti_type) > TYPE_LENGTH(known_type))
|
if (TYPE_LENGTH(rtti_type) > TYPE_LENGTH(known_type))
|
{
|
{
|
if (full)
|
if (full)
|
*full=0;
|
*full=0;
|
}
|
}
|
else
|
else
|
{
|
{
|
if (full)
|
if (full)
|
*full=1;
|
*full=1;
|
}
|
}
|
}
|
}
|
}
|
}
|
else
|
else
|
{
|
{
|
if (full)
|
if (full)
|
*full=1;
|
*full=1;
|
}
|
}
|
|
|
return rtti_type;
|
return rtti_type;
|
}
|
}
|
|
|
/* Return true if the INDEXth field of TYPE is a virtual baseclass
|
/* Return true if the INDEXth field of TYPE is a virtual baseclass
|
pointer which is for the base class whose type is BASECLASS. */
|
pointer which is for the base class whose type is BASECLASS. */
|
|
|
static int
|
static int
|
vb_match (struct type *type, int index, struct type *basetype)
|
vb_match (struct type *type, int index, struct type *basetype)
|
{
|
{
|
struct type *fieldtype;
|
struct type *fieldtype;
|
char *name = TYPE_FIELD_NAME (type, index);
|
char *name = TYPE_FIELD_NAME (type, index);
|
char *field_class_name = NULL;
|
char *field_class_name = NULL;
|
|
|
if (*name != '_')
|
if (*name != '_')
|
return 0;
|
return 0;
|
/* gcc 2.4 uses _vb$. */
|
/* gcc 2.4 uses _vb$. */
|
if (name[1] == 'v' && name[2] == 'b' && is_cplus_marker (name[3]))
|
if (name[1] == 'v' && name[2] == 'b' && is_cplus_marker (name[3]))
|
field_class_name = name + 4;
|
field_class_name = name + 4;
|
/* gcc 2.5 will use __vb_. */
|
/* gcc 2.5 will use __vb_. */
|
if (name[1] == '_' && name[2] == 'v' && name[3] == 'b' && name[4] == '_')
|
if (name[1] == '_' && name[2] == 'v' && name[3] == 'b' && name[4] == '_')
|
field_class_name = name + 5;
|
field_class_name = name + 5;
|
|
|
if (field_class_name == NULL)
|
if (field_class_name == NULL)
|
/* This field is not a virtual base class pointer. */
|
/* This field is not a virtual base class pointer. */
|
return 0;
|
return 0;
|
|
|
/* It's a virtual baseclass pointer, now we just need to find out whether
|
/* It's a virtual baseclass pointer, now we just need to find out whether
|
it is for this baseclass. */
|
it is for this baseclass. */
|
fieldtype = TYPE_FIELD_TYPE (type, index);
|
fieldtype = TYPE_FIELD_TYPE (type, index);
|
if (fieldtype == NULL
|
if (fieldtype == NULL
|
|| TYPE_CODE (fieldtype) != TYPE_CODE_PTR)
|
|| TYPE_CODE (fieldtype) != TYPE_CODE_PTR)
|
/* "Can't happen". */
|
/* "Can't happen". */
|
return 0;
|
return 0;
|
|
|
/* What we check for is that either the types are equal (needed for
|
/* What we check for is that either the types are equal (needed for
|
nameless types) or have the same name. This is ugly, and a more
|
nameless types) or have the same name. This is ugly, and a more
|
elegant solution should be devised (which would probably just push
|
elegant solution should be devised (which would probably just push
|
the ugliness into symbol reading unless we change the stabs format). */
|
the ugliness into symbol reading unless we change the stabs format). */
|
if (TYPE_TARGET_TYPE (fieldtype) == basetype)
|
if (TYPE_TARGET_TYPE (fieldtype) == basetype)
|
return 1;
|
return 1;
|
|
|
if (TYPE_NAME (basetype) != NULL
|
if (TYPE_NAME (basetype) != NULL
|
&& TYPE_NAME (TYPE_TARGET_TYPE (fieldtype)) != NULL
|
&& TYPE_NAME (TYPE_TARGET_TYPE (fieldtype)) != NULL
|
&& strcmp (TYPE_NAME (basetype),
|
&& strcmp (TYPE_NAME (basetype),
|
TYPE_NAME (TYPE_TARGET_TYPE (fieldtype))) == 0)
|
TYPE_NAME (TYPE_TARGET_TYPE (fieldtype))) == 0)
|
return 1;
|
return 1;
|
return 0;
|
return 0;
|
}
|
}
|
|
|
/* Compute the offset of the baseclass which is
|
/* Compute the offset of the baseclass which is
|
the INDEXth baseclass of class TYPE,
|
the INDEXth baseclass of class TYPE,
|
for value at VALADDR (in host) at ADDRESS (in target).
|
for value at VALADDR (in host) at ADDRESS (in target).
|
The result is the offset of the baseclass value relative
|
The result is the offset of the baseclass value relative
|
to (the address of)(ARG) + OFFSET.
|
to (the address of)(ARG) + OFFSET.
|
|
|
-1 is returned on error. */
|
-1 is returned on error. */
|
|
|
static int
|
static int
|
gnuv2_baseclass_offset (struct type *type, int index,
|
gnuv2_baseclass_offset (struct type *type, int index,
|
const bfd_byte *valaddr, CORE_ADDR address)
|
const bfd_byte *valaddr, CORE_ADDR address)
|
{
|
{
|
struct type *basetype = TYPE_BASECLASS (type, index);
|
struct type *basetype = TYPE_BASECLASS (type, index);
|
|
|
if (BASETYPE_VIA_VIRTUAL (type, index))
|
if (BASETYPE_VIA_VIRTUAL (type, index))
|
{
|
{
|
/* Must hunt for the pointer to this virtual baseclass. */
|
/* Must hunt for the pointer to this virtual baseclass. */
|
int i, len = TYPE_NFIELDS (type);
|
int i, len = TYPE_NFIELDS (type);
|
int n_baseclasses = TYPE_N_BASECLASSES (type);
|
int n_baseclasses = TYPE_N_BASECLASSES (type);
|
|
|
/* First look for the virtual baseclass pointer
|
/* First look for the virtual baseclass pointer
|
in the fields. */
|
in the fields. */
|
for (i = n_baseclasses; i < len; i++)
|
for (i = n_baseclasses; i < len; i++)
|
{
|
{
|
if (vb_match (type, i, basetype))
|
if (vb_match (type, i, basetype))
|
{
|
{
|
CORE_ADDR addr
|
CORE_ADDR addr
|
= unpack_pointer (TYPE_FIELD_TYPE (type, i),
|
= unpack_pointer (TYPE_FIELD_TYPE (type, i),
|
valaddr + (TYPE_FIELD_BITPOS (type, i) / 8));
|
valaddr + (TYPE_FIELD_BITPOS (type, i) / 8));
|
|
|
return addr - (LONGEST) address;
|
return addr - (LONGEST) address;
|
}
|
}
|
}
|
}
|
/* Not in the fields, so try looking through the baseclasses. */
|
/* Not in the fields, so try looking through the baseclasses. */
|
for (i = index + 1; i < n_baseclasses; i++)
|
for (i = index + 1; i < n_baseclasses; i++)
|
{
|
{
|
int boffset =
|
int boffset =
|
baseclass_offset (type, i, valaddr, address);
|
baseclass_offset (type, i, valaddr, address);
|
if (boffset)
|
if (boffset)
|
return boffset;
|
return boffset;
|
}
|
}
|
/* Not found. */
|
/* Not found. */
|
return -1;
|
return -1;
|
}
|
}
|
|
|
/* Baseclass is easily computed. */
|
/* Baseclass is easily computed. */
|
return TYPE_BASECLASS_BITPOS (type, index) / 8;
|
return TYPE_BASECLASS_BITPOS (type, index) / 8;
|
}
|
}
|
|
|
static void
|
static void
|
init_gnuv2_ops (void)
|
init_gnuv2_ops (void)
|
{
|
{
|
gnu_v2_abi_ops.shortname = "gnu-v2";
|
gnu_v2_abi_ops.shortname = "gnu-v2";
|
gnu_v2_abi_ops.longname = "GNU G++ Version 2 ABI";
|
gnu_v2_abi_ops.longname = "GNU G++ Version 2 ABI";
|
gnu_v2_abi_ops.doc = "G++ Version 2 ABI";
|
gnu_v2_abi_ops.doc = "G++ Version 2 ABI";
|
gnu_v2_abi_ops.is_destructor_name = gnuv2_is_destructor_name;
|
gnu_v2_abi_ops.is_destructor_name = gnuv2_is_destructor_name;
|
gnu_v2_abi_ops.is_constructor_name = gnuv2_is_constructor_name;
|
gnu_v2_abi_ops.is_constructor_name = gnuv2_is_constructor_name;
|
gnu_v2_abi_ops.is_vtable_name = gnuv2_is_vtable_name;
|
gnu_v2_abi_ops.is_vtable_name = gnuv2_is_vtable_name;
|
gnu_v2_abi_ops.is_operator_name = gnuv2_is_operator_name;
|
gnu_v2_abi_ops.is_operator_name = gnuv2_is_operator_name;
|
gnu_v2_abi_ops.virtual_fn_field = gnuv2_virtual_fn_field;
|
gnu_v2_abi_ops.virtual_fn_field = gnuv2_virtual_fn_field;
|
gnu_v2_abi_ops.rtti_type = gnuv2_value_rtti_type;
|
gnu_v2_abi_ops.rtti_type = gnuv2_value_rtti_type;
|
gnu_v2_abi_ops.baseclass_offset = gnuv2_baseclass_offset;
|
gnu_v2_abi_ops.baseclass_offset = gnuv2_baseclass_offset;
|
}
|
}
|
|
|
extern initialize_file_ftype _initialize_gnu_v2_abi; /* -Wmissing-prototypes */
|
extern initialize_file_ftype _initialize_gnu_v2_abi; /* -Wmissing-prototypes */
|
|
|
void
|
void
|
_initialize_gnu_v2_abi (void)
|
_initialize_gnu_v2_abi (void)
|
{
|
{
|
init_gnuv2_ops ();
|
init_gnuv2_ops ();
|
register_cp_abi (&gnu_v2_abi_ops);
|
register_cp_abi (&gnu_v2_abi_ops);
|
set_cp_abi_as_auto_default (gnu_v2_abi_ops.shortname);
|
set_cp_abi_as_auto_default (gnu_v2_abi_ops.shortname);
|
}
|
}
|
|
|
