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[PATCH v2 02/11] [PR gdb/14441] gdb: gdbtypes: change {lookup,make}_reference_type() API
- From: Artemiy Volkov <artemiyv at acm dot org>
- To: gdb-patches at sourceware dot org
- Cc: palves at redhat dot com, Artemiy Volkov <artemiyv at acm dot org>
- Date: Tue, 19 Jan 2016 21:53:20 +0300
- Subject: [PATCH v2 02/11] [PR gdb/14441] gdb: gdbtypes: change {lookup,make}_reference_type() API
- Authentication-results: sourceware.org; auth=none
- References: <1450661481-31178-1-git-send-email-artemiyv at acm dot org> <1453229609-20159-1-git-send-email-artemiyv at acm dot org>
Parameterize lookup_reference_type() and make_reference_type() by the kind of
reference type we want to look up. Create two wrapper functions
lookup_{lvalue,rvalue}_reference_type() for lookup_reference_type() to simplify
the API. Change all callers to use the new API.
./Changelog:
2016-01-19 Artemiy Volkov <artemiyv@acm.org>
* gdb/dwarf2read.c (read_tag_reference_type): Use
lookup_lvalue_reference_type() instead of lookup_reference_type().
* gdb/eval.c (evaluate_subexp_standard): Likewise.
* gdb/f-exp.y: Likewise.
* gdb/gdbtypes.c (make_reference_type): Generalize with rvalue
reference types.
(lookup_reference_type): Generalize with rvalue reference types.
(lookup_lvalue_reference_type): New convenience wrapper for
lookup_reference_type().
(lookup_rvalue_reference_type): Likewise.
* gdb/gdbtypes.h: Change interface for
{make,lookup}_{rvalue,}_reference_type().
* gdb/guile/scm-type.c (gdbscm_type_reference): Use
lookup_lvalue_reference_type() instead of lookup_reference_type().
* gdb/guile/scm-value.c (gdbscm_value_dynamic_type): Likewise.
* gdb/parse.c (follow_types): Likewise.
* gdb/python/py-type.c (typy_reference): Likewise.
(typy_lookup_type): Likewise.
* gdb/python/py-value.c (valpy_get_dynamic_type): Likewise.
(valpy_getitem): Likewise.
* gdb/python/py-xmethods.c (gdbpy_get_xmethod_result_type):
Likewise.
(gdbpy_invoke_xmethod): Likewise.
* gdb/stabsread.c: Provide extra argument to make_reference_type()
call.
* gdb/valops.c (value_ref): Use lookup_lvalue_reference_type()
instead of lookup_reference_type().
(value_rtti_indirect_type): Likewise.
---
gdb/dwarf2read.c | 2 +-
gdb/eval.c | 2 +-
gdb/f-exp.y | 2 +-
gdb/gdbtypes.c | 45 ++++++++++++++++++++++++++++++++++-----------
gdb/gdbtypes.h | 8 ++++++--
gdb/guile/scm-type.c | 2 +-
gdb/guile/scm-value.c | 2 +-
gdb/parse.c | 2 +-
gdb/python/py-type.c | 4 ++--
gdb/python/py-value.c | 4 ++--
gdb/python/py-xmethods.c | 4 ++--
gdb/stabsread.c | 2 +-
gdb/valops.c | 4 ++--
13 files changed, 55 insertions(+), 28 deletions(-)
diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 1020c12..d2a3a50 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -14337,7 +14337,7 @@ read_tag_reference_type (struct die_info *die, struct dwarf2_cu *cu)
if (type)
return type;
- type = lookup_reference_type (target_type);
+ type = lookup_lvalue_reference_type (target_type);
attr = dwarf2_attr (die, DW_AT_byte_size, cu);
if (attr)
{
diff --git a/gdb/eval.c b/gdb/eval.c
index 78ad946..729f473 100644
--- a/gdb/eval.c
+++ b/gdb/eval.c
@@ -2789,7 +2789,7 @@ evaluate_subexp_standard (struct type *expect_type,
if (TYPE_CODE (check_typedef (type)) != TYPE_CODE_REF)
{
- type = lookup_reference_type (type);
+ type = lookup_lvalue_reference_type (type);
result = allocate_value (type);
}
}
diff --git a/gdb/f-exp.y b/gdb/f-exp.y
index 4faac32..0aa8235 100644
--- a/gdb/f-exp.y
+++ b/gdb/f-exp.y
@@ -567,7 +567,7 @@ ptype : typebase
follow_type = lookup_pointer_type (follow_type);
break;
case tp_reference:
- follow_type = lookup_reference_type (follow_type);
+ follow_type = lookup_lvalue_reference_type (follow_type);
break;
case tp_array:
array_size = pop_type_int ();
diff --git a/gdb/gdbtypes.c b/gdb/gdbtypes.c
index f129b0e..058b77d 100644
--- a/gdb/gdbtypes.c
+++ b/gdb/gdbtypes.c
@@ -382,17 +382,23 @@ lookup_pointer_type (struct type *type)
}
/* Lookup a C++ `reference' to a type TYPE. TYPEPTR, if nonzero,
- points to a pointer to memory where the reference type should be
- stored. If *TYPEPTR is zero, update it to point to the reference
- type we return. We allocate new memory if needed. */
+ points to a pointer to memory where the reference type should be stored.
+ If *TYPEPTR is zero, update it to point to the reference type we return.
+ REFCODE denotes the kind of reference type to lookup (lvalue or rvalue
+ reference). We allocate new memory if needed. */
struct type *
-make_reference_type (struct type *type, struct type **typeptr)
+make_reference_type (struct type *type, struct type **typeptr,
+ enum type_code refcode)
{
struct type *ntype; /* New type */
+ struct type **reftype;
struct type *chain;
- ntype = TYPE_REFERENCE_TYPE (type);
+ gdb_assert (refcode == TYPE_CODE_REF || refcode == TYPE_CODE_RVALUE_REF);
+
+ ntype = (refcode == TYPE_CODE_REF ? TYPE_REFERENCE_TYPE (type)
+ : TYPE_RVALUE_REFERENCE_TYPE (type));
if (ntype)
{
@@ -421,7 +427,11 @@ make_reference_type (struct type *type, struct type **typeptr)
}
TYPE_TARGET_TYPE (ntype) = type;
- TYPE_REFERENCE_TYPE (type) = ntype;
+ reftype = (refcode == TYPE_CODE_REF ? &TYPE_REFERENCE_TYPE (type)
+ : &TYPE_RVALUE_REFERENCE_TYPE (type));
+
+ if(!*reftype)
+ *reftype = ntype;
/* FIXME! Assume the machine has only one representation for
references, and that it matches the (only) representation for
@@ -429,10 +439,9 @@ make_reference_type (struct type *type, struct type **typeptr)
TYPE_LENGTH (ntype) =
gdbarch_ptr_bit (get_type_arch (type)) / TARGET_CHAR_BIT;
- TYPE_CODE (ntype) = TYPE_CODE_REF;
+ TYPE_CODE (ntype) = refcode;
- if (!TYPE_REFERENCE_TYPE (type)) /* Remember it, if don't have one. */
- TYPE_REFERENCE_TYPE (type) = ntype;
+ *reftype = ntype;
/* Update the length of all the other variants of this type. */
chain = TYPE_CHAIN (ntype);
@@ -449,9 +458,23 @@ make_reference_type (struct type *type, struct type **typeptr)
details. */
struct type *
-lookup_reference_type (struct type *type)
+lookup_reference_type (struct type *type, enum type_code refcode)
+{
+ return make_reference_type (type, (struct type **) 0, refcode);
+}
+
+/* Separate convenience functions for lvalue and rvalue references. */
+
+struct type *
+lookup_lvalue_reference_type (struct type *type)
+{
+ return lookup_reference_type (type, TYPE_CODE_REF);
+}
+
+struct type *
+lookup_rvalue_reference_type (struct type *type)
{
- return make_reference_type (type, (struct type **) 0);
+ return lookup_reference_type (type, TYPE_CODE_RVALUE_REF);
}
/* Lookup a function type that returns type TYPE. TYPEPTR, if
diff --git a/gdb/gdbtypes.h b/gdb/gdbtypes.h
index 52419b4..d9b6b9e 100644
--- a/gdb/gdbtypes.h
+++ b/gdb/gdbtypes.h
@@ -1725,9 +1725,13 @@ extern void append_flags_type_flag (struct type *type, int bitpos, char *name);
extern void make_vector_type (struct type *array_type);
extern struct type *init_vector_type (struct type *elt_type, int n);
-extern struct type *lookup_reference_type (struct type *);
+extern struct type *lookup_reference_type (struct type *, enum type_code);
+extern struct type *lookup_lvalue_reference_type (struct type *);
+extern struct type *lookup_rvalue_reference_type (struct type *);
-extern struct type *make_reference_type (struct type *, struct type **);
+
+extern struct type *make_reference_type (struct type *, struct type **,
+ enum type_code);
extern struct type *make_cv_type (int, int, struct type *, struct type **);
diff --git a/gdb/guile/scm-type.c b/gdb/guile/scm-type.c
index 2acdfad..888624d 100644
--- a/gdb/guile/scm-type.c
+++ b/gdb/guile/scm-type.c
@@ -854,7 +854,7 @@ gdbscm_type_reference (SCM self)
TRY
{
- type = lookup_reference_type (type);
+ type = lookup_lvalue_reference_type (type);
}
CATCH (except, RETURN_MASK_ALL)
{
diff --git a/gdb/guile/scm-value.c b/gdb/guile/scm-value.c
index 1cdf953..1681a77 100644
--- a/gdb/guile/scm-value.c
+++ b/gdb/guile/scm-value.c
@@ -601,7 +601,7 @@ gdbscm_value_dynamic_type (SCM self)
if (was_pointer)
type = lookup_pointer_type (type);
else
- type = lookup_reference_type (type);
+ type = lookup_lvalue_reference_type (type);
}
}
else if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
diff --git a/gdb/parse.c b/gdb/parse.c
index 4191fc6..06f7bcd 100644
--- a/gdb/parse.c
+++ b/gdb/parse.c
@@ -1695,7 +1695,7 @@ follow_types (struct type *follow_type)
make_addr_space = 0;
break;
case tp_reference:
- follow_type = lookup_reference_type (follow_type);
+ follow_type = lookup_lvalue_reference_type (follow_type);
if (make_const)
follow_type = make_cv_type (make_const,
TYPE_VOLATILE (follow_type),
diff --git a/gdb/python/py-type.c b/gdb/python/py-type.c
index 03cc8d9..385cb53 100644
--- a/gdb/python/py-type.c
+++ b/gdb/python/py-type.c
@@ -667,7 +667,7 @@ typy_reference (PyObject *self, PyObject *args)
TRY
{
- type = lookup_reference_type (type);
+ type = lookup_lvalue_reference_type (type);
}
CATCH (except, RETURN_MASK_ALL)
{
@@ -827,7 +827,7 @@ typy_lookup_type (struct demangle_component *demangled,
switch (demangled_type)
{
case DEMANGLE_COMPONENT_REFERENCE:
- rtype = lookup_reference_type (type);
+ rtype = lookup_lvalue_reference_type (type);
break;
case DEMANGLE_COMPONENT_POINTER:
rtype = lookup_pointer_type (type);
diff --git a/gdb/python/py-value.c b/gdb/python/py-value.c
index 7dba0ad..9d479ea 100644
--- a/gdb/python/py-value.c
+++ b/gdb/python/py-value.c
@@ -376,7 +376,7 @@ valpy_get_dynamic_type (PyObject *self, void *closure)
if (was_pointer)
type = lookup_pointer_type (type);
else
- type = lookup_reference_type (type);
+ type = lookup_lvalue_reference_type (type);
}
}
else if (TYPE_CODE (type) == TYPE_CODE_STRUCT)
@@ -766,7 +766,7 @@ valpy_getitem (PyObject *self, PyObject *key)
if (TYPE_CODE (val_type) == TYPE_CODE_PTR)
res_val = value_cast (lookup_pointer_type (base_class_type), tmp);
else if (TYPE_CODE (val_type) == TYPE_CODE_REF)
- res_val = value_cast (lookup_reference_type (base_class_type), tmp);
+ res_val = value_cast (lookup_lvalue_reference_type (base_class_type), tmp);
else
res_val = value_cast (base_class_type, tmp);
}
diff --git a/gdb/python/py-xmethods.c b/gdb/python/py-xmethods.c
index 58bb783..d70cdd1 100644
--- a/gdb/python/py-xmethods.c
+++ b/gdb/python/py-xmethods.c
@@ -550,7 +550,7 @@ gdbpy_get_xmethod_result_type (const struct extension_language_defn *extlang,
}
else if (TYPE_CODE (obj_type) == TYPE_CODE_REF)
{
- struct type *this_ref = lookup_reference_type (this_type);
+ struct type *this_ref = lookup_lvalue_reference_type (this_type);
if (!types_equal (obj_type, this_ref))
obj = value_cast (this_ref, obj);
@@ -636,7 +636,7 @@ gdbpy_invoke_xmethod (const struct extension_language_defn *extlang,
}
else if (TYPE_CODE (obj_type) == TYPE_CODE_REF)
{
- struct type *this_ref = lookup_reference_type (this_type);
+ struct type *this_ref = lookup_lvalue_reference_type (this_type);
if (!types_equal (obj_type, this_ref))
obj = value_cast (this_ref, obj);
diff --git a/gdb/stabsread.c b/gdb/stabsread.c
index 74260b7..8a50dbd 100644
--- a/gdb/stabsread.c
+++ b/gdb/stabsread.c
@@ -1772,7 +1772,7 @@ again:
case '&': /* Reference to another type */
type1 = read_type (pp, objfile);
- type = make_reference_type (type1, dbx_lookup_type (typenums, objfile));
+ type = make_reference_type (type1, dbx_lookup_type (typenums, objfile), TYPE_CODE_REF);
break;
case 'f': /* Function returning another type */
diff --git a/gdb/valops.c b/gdb/valops.c
index 5a244a9..1aafb5a 100644
--- a/gdb/valops.c
+++ b/gdb/valops.c
@@ -1508,7 +1508,7 @@ value_ref (struct value *arg1)
return arg1;
arg2 = value_addr (arg1);
- deprecated_set_value_type (arg2, lookup_reference_type (type));
+ deprecated_set_value_type (arg2, lookup_lvalue_reference_type (type));
return arg2;
}
@@ -3616,7 +3616,7 @@ value_rtti_indirect_type (struct value *v, int *full,
real_type = make_cv_type (TYPE_CONST (target_type),
TYPE_VOLATILE (target_type), real_type, NULL);
if (TYPE_CODE (type) == TYPE_CODE_REF)
- real_type = lookup_reference_type (real_type);
+ real_type = lookup_lvalue_reference_type (real_type);
else if (TYPE_CODE (type) == TYPE_CODE_PTR)
real_type = lookup_pointer_type (real_type);
else
--
2.7.0