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Add ability to return rvalue reference values from value_ref

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Parameterize value_ref() by the kind of reference type the value of which
is requested. Change all callers to use the new API.

gdb/ChangeLog

	PR gdb/14441
	* ada-lang.c (ada_evaluate_subexp): Adhere to the new
	value_ref() interface.
	* c-valprint.c (c_value_print): Likewise.
	* infcall.c (value_arg_coerce): Likewise.
	* python/py-value.c (valpy_reference_value): Likewise.
	* valops.c (value_cast, value_reinterpret_cast)
	(value_dynamic_cast, typecmp): Likewise.
	(value_ref): Parameterize by kind of return value reference type.
	* value.h (value_ref): Add new parameter "refcode".
This commit is contained in:
Artemiy Volkov
2017-03-20 13:47:41 -07:00
committed by Keith Seitz
parent 3b22433085
commit a65cfae5f8
8 changed files with 44 additions and 17 deletions
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13
gdb/ChangeLog
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@ -1,3 +1,16 @@
2017-03-20 Artemiy Volkov <artemiyv@acm.org>
PR gdb/14441
* ada-lang.c (ada_evaluate_subexp): Adhere to the new
value_ref() interface.
* c-valprint.c (c_value_print): Likewise.
* infcall.c (value_arg_coerce): Likewise.
* python/py-value.c (valpy_reference_value): Likewise.
* valops.c (value_cast, value_reinterpret_cast)
(value_dynamic_cast, typecmp): Likewise.
(value_ref): Parameterize by kind of return value reference type.
* value.h (value_ref): Add new parameter "refcode".
2017-03-20 Artemiy Volkov <artemiyv@acm.org>
PR gdb/14441

2
gdb/ada-lang.c
View File

@ -10707,7 +10707,7 @@ ada_evaluate_subexp (struct type *expect_type, struct expression *exp,
should return a ref as it should be valid to ask
for its address; so rebuild a ref after coerce. */
arg1 = ada_coerce_ref (arg1);
return value_ref (arg1);
return value_ref (arg1, TYPE_CODE_REF);
}
}

10
gdb/c-valprint.c
View File

@ -606,10 +606,14 @@ c_value_print (struct value *val, struct ui_file *stream,
else if (options->objectprint
&& (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT))
{
int is_ref = TYPE_CODE (type) == TYPE_CODE_REF;
int is_ref = TYPE_IS_REFERENCE (type);
enum type_code refcode = TYPE_CODE_UNDEF;
if (is_ref)
val = value_addr (val);
{
val = value_addr (val);
refcode = TYPE_CODE (type);
}
/* Pointer to class, check real type of object. */
fprintf_filtered (stream, "(");
@ -635,7 +639,7 @@ c_value_print (struct value *val, struct ui_file *stream,
if (is_ref)
{
val = value_ref (value_ind (val));
val = value_ref (value_ind (val), refcode);
type = value_type (val);
}

2
gdb/infcall.c
View File

@ -168,7 +168,7 @@ value_arg_coerce (struct gdbarch *gdbarch, struct value *arg,
if the value was not previously in memory - in some cases
we should clearly be allowing this, but how? */
new_value = value_cast (TYPE_TARGET_TYPE (type), arg);
new_value = value_ref (new_value);
new_value = value_ref (new_value, TYPE_CODE (type));
return new_value;
}
case TYPE_CODE_INT:

2
gdb/python/py-value.c
View File

@ -248,7 +248,7 @@ valpy_reference_value (PyObject *self, PyObject *args)
scoped_value_mark free_values;
self_val = ((value_object *) self)->value;
result = value_to_value_object (value_ref (self_val));
result = value_to_value_object (value_ref (self_val, TYPE_CODE_REF));
}
CATCH (except, RETURN_MASK_ALL)
{

5
gdb/python/py-xmethods.c
View File

@ -552,9 +552,10 @@ gdbpy_invoke_xmethod (const struct extension_language_defn *extlang,
if (!types_equal (obj_type, this_ptr))
obj = value_cast (this_ptr, obj);
}
else if (TYPE_CODE (obj_type) == TYPE_CODE_REF)
else if (TYPE_IS_REFERENCE (obj_type))
{
struct type *this_ref = lookup_lvalue_reference_type (this_type);
struct type *this_ref
= lookup_reference_type (this_type, TYPE_CODE (obj_type));
if (!types_equal (obj_type, this_ref))
obj = value_cast (this_ref, obj);

25
gdb/valops.c
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@ -373,7 +373,7 @@ value_cast (struct type *type, struct value *arg2)
struct type *dereftype = check_typedef (TYPE_TARGET_TYPE (t1));
struct value *val = value_cast (dereftype, arg2);
return value_ref (val);
return value_ref (val, TYPE_CODE (t1));
}
code2 = TYPE_CODE (check_typedef (value_type (arg2)));
@ -623,7 +623,8 @@ value_reinterpret_cast (struct type *type, struct value *arg)
error (_("Invalid reinterpret_cast"));
if (is_ref)
result = value_cast (type, value_ref (value_ind (result)));
result = value_cast (type, value_ref (value_ind (result),
TYPE_CODE (type)));
return result;
}
@ -819,7 +820,9 @@ value_dynamic_cast (struct type *type, struct value *arg)
arg_type,
&result) == 1)
return value_cast (type,
is_ref ? value_ref (result) : value_addr (result));
is_ref
? value_ref (result, TYPE_CODE (resolved_type))
: value_addr (result));
}
/* The second dynamic check specified in 5.2.7. */
@ -831,7 +834,9 @@ value_dynamic_cast (struct type *type, struct value *arg)
value_address (tem), tem,
rtti_type, &result) == 1)
return value_cast (type,
is_ref ? value_ref (result) : value_addr (result));
is_ref
? value_ref (result, TYPE_CODE (resolved_type))
: value_addr (result));
if (TYPE_CODE (resolved_type) == TYPE_CODE_PTR)
return value_zero (type, not_lval);
@ -1527,16 +1532,20 @@ value_addr (struct value *arg1)
contents. */
struct value *
value_ref (struct value *arg1)
value_ref (struct value *arg1, enum type_code refcode)
{
struct value *arg2;
struct type *type = check_typedef (value_type (arg1));
if (TYPE_CODE (type) == TYPE_CODE_REF)
gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF);
if ((TYPE_CODE (type) == TYPE_CODE_REF
|| TYPE_CODE (type) == TYPE_CODE_RVALUE_REF)
&& TYPE_CODE (type) == refcode)
return arg1;
arg2 = value_addr (arg1);
deprecated_set_value_type (arg2, lookup_lvalue_reference_type (type));
deprecated_set_value_type (arg2, lookup_reference_type (type, refcode));
return arg2;
}
@ -1743,7 +1752,7 @@ typecmp (int staticp, int varargs, int nargs,
if (TYPE_CODE (tt2) == TYPE_CODE_ARRAY)
t2[i] = value_coerce_array (t2[i]);
else
t2[i] = value_ref (t2[i]);
t2[i] = value_ref (t2[i], TYPE_CODE (tt1));
continue;
}

2
gdb/value.h
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@ -775,7 +775,7 @@ extern struct value *value_ind (struct value *arg1);
extern struct value *value_addr (struct value *arg1);
extern struct value *value_ref (struct value *arg1);
extern struct value *value_ref (struct value *arg1, enum type_code refcode);
extern struct value *value_assign (struct value *toval,
struct value *fromval);