VALUE_NEXT (val) = all_values;
all_values = val;
VALUE_TYPE (val) = type;
+ VALUE_ENCLOSING_TYPE (val) = type;
VALUE_LVAL (val) = not_lval;
VALUE_ADDRESS (val) = 0;
VALUE_FRAME (val) = 0;
VALUE_LAZY (val) = 0;
VALUE_OPTIMIZED_OUT (val) = 0;
VALUE_BFD_SECTION (val) = NULL;
+ VALUE_EMBEDDED_OFFSET (val) = 0;
+ VALUE_POINTED_TO_OFFSET (val) = 0;
val->modifiable = 1;
return val;
}
value_copy (arg)
value_ptr arg;
{
- register struct type *type = VALUE_TYPE (arg);
- register value_ptr val = allocate_value (type);
+ register struct type *encl_type = VALUE_ENCLOSING_TYPE (arg);
+ register value_ptr val = allocate_value (encl_type);
+ VALUE_TYPE (val) = VALUE_TYPE (arg);
VALUE_LVAL (val) = VALUE_LVAL (arg);
VALUE_ADDRESS (val) = VALUE_ADDRESS (arg);
VALUE_OFFSET (val) = VALUE_OFFSET (arg);
VALUE_REGNO (val) = VALUE_REGNO (arg);
VALUE_LAZY (val) = VALUE_LAZY (arg);
VALUE_OPTIMIZED_OUT (val) = VALUE_OPTIMIZED_OUT (arg);
+ VALUE_EMBEDDED_OFFSET (val) = VALUE_EMBEDDED_OFFSET (arg);
+ VALUE_POINTED_TO_OFFSET (val) = VALUE_POINTED_TO_OFFSET (arg);
VALUE_BFD_SECTION (val) = VALUE_BFD_SECTION (arg);
val->modifiable = arg->modifiable;
if (!VALUE_LAZY (val))
{
- memcpy (VALUE_CONTENTS_RAW (val), VALUE_CONTENTS_RAW (arg),
- TYPE_LENGTH (VALUE_TYPE (arg)));
+ memcpy (VALUE_CONTENTS_ALL_RAW (val), VALUE_CONTENTS_ALL_RAW (arg),
+ TYPE_LENGTH (VALUE_ENCLOSING_TYPE (arg)));
+
}
return val;
}
char *phys_name = TYPE_FIELD_STATIC_PHYSNAME (type, fieldno);
struct symbol *sym = lookup_symbol (phys_name, 0, VAR_NAMESPACE, 0, NULL);
if (sym == NULL)
- return NULL;
- addr = SYMBOL_VALUE_ADDRESS (sym);
- sect = SYMBOL_BFD_SECTION (sym);
+ {
+ /* With some compilers, e.g. HP aCC, static data members are reported
+ as non-debuggable symbols */
+ struct minimal_symbol * msym = lookup_minimal_symbol (phys_name, NULL, NULL);
+ if (!msym)
+ return NULL;
+ else
+ {
+ addr = SYMBOL_VALUE_ADDRESS (msym);
+ sect = SYMBOL_BFD_SECTION (msym);
+ }
+ }
+ else
+ {
+ addr = SYMBOL_VALUE_ADDRESS (sym);
+ sect = SYMBOL_BFD_SECTION (sym);
+ }
SET_FIELD_PHYSADDR (TYPE_FIELD (type, fieldno), addr);
}
return value_at (TYPE_FIELD_TYPE (type, fieldno), addr, sect);
VALUE_BITPOS (v) = TYPE_FIELD_BITPOS (arg_type, fieldno) % 8;
VALUE_BITSIZE (v) = TYPE_FIELD_BITSIZE (arg_type, fieldno);
}
+ else if (fieldno < TYPE_N_BASECLASSES (arg_type))
+ {
+ /* This field is actually a base subobject, so preserve the
+ entire object's contents for later references to virtual
+ bases, etc. */
+ v = allocate_value (VALUE_ENCLOSING_TYPE (arg1));
+ VALUE_TYPE (v) = arg_type;
+ if (VALUE_LAZY (arg1))
+ VALUE_LAZY (v) = 1;
+ else
+ memcpy (VALUE_CONTENTS_ALL_RAW (v), VALUE_CONTENTS_ALL_RAW (arg1),
+ TYPE_LENGTH (VALUE_ENCLOSING_TYPE (arg1)));
+ VALUE_OFFSET (v) = VALUE_OFFSET (arg1);
+ VALUE_EMBEDDED_OFFSET (v)
+ = offset +
+ VALUE_EMBEDDED_OFFSET (arg1) +
+ TYPE_FIELD_BITPOS (arg_type, fieldno) / 8;
+ }
else
{
+ /* Plain old data member */
+ offset += TYPE_FIELD_BITPOS (arg_type, fieldno) / 8;
v = allocate_value (type);
if (VALUE_LAZY (arg1))
VALUE_LAZY (v) = 1;
else
memcpy (VALUE_CONTENTS_RAW (v),
- VALUE_CONTENTS_RAW (arg1) + offset
- + TYPE_FIELD_BITPOS (arg_type, fieldno) / 8,
+ VALUE_CONTENTS_RAW (arg1) + offset,
TYPE_LENGTH (type));
+ VALUE_OFFSET (v) = VALUE_OFFSET (arg1) + offset;
}
VALUE_LVAL (v) = VALUE_LVAL (arg1);
if (VALUE_LVAL (arg1) == lval_internalvar)
VALUE_LVAL (v) = lval_internalvar_component;
VALUE_ADDRESS (v) = VALUE_ADDRESS (arg1);
- VALUE_OFFSET (v) = VALUE_OFFSET (arg1) + offset
- + TYPE_FIELD_BITPOS (arg_type, fieldno) / 8;
+/* VALUE_OFFSET (v) = VALUE_OFFSET (arg1) + offset
+ + TYPE_FIELD_BITPOS (arg_type, fieldno) / 8; */
return v;
}
{
value_ptr arg1 = *arg1p;
struct type *type1 = check_typedef (VALUE_TYPE (arg1));
- struct type *entry_type;
- /* First, get the virtual function table pointer. That comes
- with a strange type, so cast it to type `pointer to long' (which
- should serve just fine as a function type). Then, index into
- the table, and convert final value to appropriate function type. */
- value_ptr entry, vfn, vtbl;
- value_ptr vi = value_from_longest (builtin_type_int,
- (LONGEST) TYPE_FN_FIELD_VOFFSET (f, j));
- struct type *fcontext = TYPE_FN_FIELD_FCONTEXT (f, j);
- struct type *context;
- if (fcontext == NULL)
- /* 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.
- This won't work right for multiple inheritance, but at least we
- should do as well as GDB 3.x did. */
- fcontext = TYPE_VPTR_BASETYPE (type);
- context = lookup_pointer_type (fcontext);
- /* Now context is a pointer to the basetype containing the vtbl. */
- if (TYPE_TARGET_TYPE (context) != type1)
- {
- arg1 = value_ind (value_cast (context, value_addr (arg1)));
- type1 = check_typedef (VALUE_TYPE (arg1));
- }
- context = type1;
- /* Now context is the basetype containing the vtbl. */
-
- /* This type may have been defined before its virtual function table
- was. If so, fill in the virtual function table entry for the
- type now. */
- if (TYPE_VPTR_FIELDNO (context) < 0)
- fill_in_vptr_fieldno (context);
-
- /* The virtual function table is now an array of structures
- which have the form { int16 offset, delta; void *pfn; }. */
- vtbl = value_ind (value_primitive_field (arg1, 0,
- TYPE_VPTR_FIELDNO (context),
- TYPE_VPTR_BASETYPE (context)));
-
- /* 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
- time, e.g. if the user has set a conditional breakpoint calling
- a virtual function. */
- entry = value_subscript (vtbl, vi);
- entry_type = check_typedef (VALUE_TYPE (entry));
-
- if (TYPE_CODE (entry_type) == TYPE_CODE_STRUCT)
+ if (TYPE_HAS_VTABLE (type))
{
- /* Move the `this' pointer according to the virtual function table. */
- VALUE_OFFSET (arg1) += value_as_long (value_field (entry, 0));
+ /* Deal with HP/Taligent runtime model for virtual functions */
+ value_ptr vp;
+ value_ptr argp; /* arg1 cast to base */
+ CORE_ADDR vfunc_addr; /* address of virtual method */
+ CORE_ADDR coreptr; /* pointer to target address */
+ int class_index; /* which class segment pointer to use */
+ struct type * ftype = TYPE_FN_FIELD_TYPE (f, j); /* method type */
+
+ argp = value_cast (type, *arg1p);
+
+ if (VALUE_ADDRESS (argp) == 0)
+ error ("Address of object is null; object may not have been created.");
- if (! VALUE_LAZY (arg1))
- {
- VALUE_LAZY (arg1) = 1;
- value_fetch_lazy (arg1);
- }
+ /* pai: FIXME -- 32x64 possible problem? */
+ /* First word (4 bytes) in object layout is the vtable pointer */
+ coreptr = * (CORE_ADDR *) (VALUE_CONTENTS (argp)); /* pai: (temp) */
+ /* + offset + VALUE_EMBEDDED_OFFSET (argp)); */
- vfn = value_field (entry, 2);
+ if (!coreptr)
+ error ("Virtual table pointer is null for object; object may not have been created.");
+
+ /* pai/1997-05-09
+ * FIXME: The code here currently handles only
+ * the non-RRBC case of the Taligent/HP runtime spec; when RRBC
+ * is introduced, the condition for the "if" below will have to
+ * be changed to be a test for the RRBC case. */
+
+ if (1)
+ {
+ /* Non-RRBC case; the virtual function pointers are stored at fixed
+ * offsets in the virtual table. */
+
+ /* Retrieve the offset in the virtual table from the debug
+ * info. The offset of the vfunc's entry is in words from
+ * the beginning of the vtable; but first we have to adjust
+ * by HP_ACC_VFUNC_START to account for other entries */
+
+ /* pai: FIXME: 32x64 problem here, a word may be 8 bytes in
+ * which case the multiplier should be 8 and values should be long */
+ vp = value_at (builtin_type_int,
+ coreptr + 4 * (TYPE_FN_FIELD_VOFFSET (f, j) + HP_ACC_VFUNC_START), NULL);
+
+ coreptr = * (CORE_ADDR *) (VALUE_CONTENTS (vp));
+ /* coreptr now contains the address of the virtual function */
+ /* (Actually, it contains the pointer to the plabel for the function. */
+ }
+ else
+ {
+ /* RRBC case; the virtual function pointers are found by double
+ * indirection through the class segment tables. */
+
+ /* Choose class segment depending on type we were passed */
+ class_index = class_index_in_primary_list (type);
+
+ /* Find class segment pointer. These are in the vtable slots after
+ * some other entries, so adjust by HP_ACC_VFUNC_START for that. */
+ /* pai: FIXME 32x64 problem here, if words are 8 bytes long
+ * the multiplier below has to be 8 and value should be long. */
+ vp = value_at (builtin_type_int,
+ coreptr + 4 * (HP_ACC_VFUNC_START + class_index), NULL);
+ /* Indirect once more, offset by function index */
+ /* pai: FIXME 32x64 problem here, again multiplier could be 8 and value long */
+ coreptr = * (CORE_ADDR *) (VALUE_CONTENTS (vp) + 4 * TYPE_FN_FIELD_VOFFSET (f, j));
+ vp = value_at (builtin_type_int, coreptr, NULL);
+ coreptr = * (CORE_ADDR *) (VALUE_CONTENTS (vp));
+
+ /* coreptr now contains the address of the virtual function */
+ /* (Actually, it contains the pointer to the plabel for the function.) */
+
+ }
+
+ if (!coreptr)
+ error ("Address of virtual function is null; error in virtual table?");
+
+ /* Wrap this addr in a value and return pointer */
+ vp = allocate_value (ftype);
+ VALUE_TYPE (vp) = ftype;
+ VALUE_ADDRESS (vp) = coreptr;
+
+ /* pai: (temp) do we need the value_ind stuff in value_fn_field? */
+ return vp;
}
- else if (TYPE_CODE (entry_type) == TYPE_CODE_PTR)
- vfn = entry;
- else
- error ("I'm confused: virtual function table has bad type");
- /* Reinstantiate the function pointer with the correct type. */
- VALUE_TYPE (vfn) = lookup_pointer_type (TYPE_FN_FIELD_TYPE (f, j));
+ else
+ { /* Not using HP/Taligent runtime conventions; so try to
+ * use g++ conventions for virtual table */
+
+ struct type *entry_type;
+ /* First, get the virtual function table pointer. That comes
+ with a strange type, so cast it to type `pointer to long' (which
+ should serve just fine as a function type). Then, index into
+ the table, and convert final value to appropriate function type. */
+ value_ptr entry, vfn, vtbl;
+ value_ptr vi = value_from_longest (builtin_type_int,
+ (LONGEST) TYPE_FN_FIELD_VOFFSET (f, j));
+ struct type *fcontext = TYPE_FN_FIELD_FCONTEXT (f, j);
+ struct type *context;
+ if (fcontext == NULL)
+ /* 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.
+ This won't work right for multiple inheritance, but at least we
+ should do as well as GDB 3.x did. */
+ fcontext = TYPE_VPTR_BASETYPE (type);
+ context = lookup_pointer_type (fcontext);
+ /* Now context is a pointer to the basetype containing the vtbl. */
+ if (TYPE_TARGET_TYPE (context) != type1)
+ {
+ arg1 = value_ind (value_cast (context, value_addr (arg1)));
+ type1 = check_typedef (VALUE_TYPE (arg1));
+ }
+
+ context = type1;
+ /* Now context is the basetype containing the vtbl. */
+
+ /* This type may have been defined before its virtual function table
+ was. If so, fill in the virtual function table entry for the
+ type now. */
+ if (TYPE_VPTR_FIELDNO (context) < 0)
+ fill_in_vptr_fieldno (context);
+
+ /* The virtual function table is now an array of structures
+ which have the form { int16 offset, delta; void *pfn; }. */
+ vtbl = value_ind (value_primitive_field (arg1, 0,
+ TYPE_VPTR_FIELDNO (context),
+ TYPE_VPTR_BASETYPE (context)));
+
+ /* 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
+ time, e.g. if the user has set a conditional breakpoint calling
+ a virtual function. */
+ entry = value_subscript (vtbl, vi);
+ entry_type = check_typedef (VALUE_TYPE (entry));
+
+ if (TYPE_CODE (entry_type) == TYPE_CODE_STRUCT)
+ {
+ /* Move the `this' pointer according to the virtual function table. */
+ VALUE_OFFSET (arg1) += value_as_long (value_field (entry, 0));
+
+ if (! VALUE_LAZY (arg1))
+ {
+ VALUE_LAZY (arg1) = 1;
+ value_fetch_lazy (arg1);
+ }
+
+ vfn = value_field (entry, 2);
+ }
+ else if (TYPE_CODE (entry_type) == TYPE_CODE_PTR)
+ vfn = entry;
+ else
+ error ("I'm confused: virtual function table has bad type");
+ /* Reinstantiate the function pointer with the correct type. */
+ VALUE_TYPE (vfn) = lookup_pointer_type (TYPE_FN_FIELD_TYPE (f, j));
- *arg1p = arg1;
- return vfn;
+ *arg1p = arg1;
+ return vfn;
+ }
}
/* ARG is a pointer to an object we know to be at least
projects / thirdparty / binutils-gdb.git / blobdiff