From b92c7933ebf8a09a97ca2419d253a0ac1acdca6f Mon Sep 17 00:00:00 2001
From: Mark Wielaard <mjw@redhat.com>
Date: Sun, 23 Mar 2014 12:05:16 +0100
Subject: [PATCH] PR debug/16063. Add DW_AT_type to DW_TAG_enumeration.
Add a new lang-hook that provides the underlying base type of an
ENUMERAL_TYPE. Including implementations for C and C++. Use this
enum_underlying_base_type lang-hook in dwarf2out.c to add a DW_AT_type
base type reference to a DW_TAG_enumeration.
gcc/
* dwarf2out.c (gen_enumeration_type_die): Add DW_AT_type if
enum_underlying_base_type defined and DWARF version > 3.
* langhooks.h (struct lang_hooks_for_types): Add
enum_underlying_base_type.
* langhooks-def.h (LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE): New define.
(LANG_HOOKS_FOR_TYPES_INITIALIZER): Add new lang hook.
gcc/c-family/
* c-common.c (c_enum_underlying_base_type): New function.
* c-common.h (c_enum_underlying_base_type): Add declaration.
gcc/c/
* c-objc-common.h (LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE): Define.
gcc/cp/
* cp-lang.c (cxx_enum_underlying_base_type): New function.
(LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE): Define.
---
gcc/ChangeLog | 10 ++++++++++
gcc/c-family/ChangeLog | 6 ++++++
gcc/c-family/c-common.c | 8 ++++++++
gcc/c-family/c-common.h | 1 +
gcc/c/ChangeLog | 5 +++++
gcc/c/c-objc-common.h | 2 ++
gcc/cp/ChangeLog | 6 ++++++
gcc/cp/cp-lang.c | 18 ++++++++++++++++++
gcc/dwarf2out.c | 7 +++++++
gcc/langhooks-def.h | 4 +++-
gcc/langhooks.h | 2 ++
11 files changed, 68 insertions(+), 1 deletions(-)
@@ -1,5 +1,15 @@
2014-03-21 Mark Wielaard <mjw@redhat.com>
+ PR debug/16063
+ * dwarf2out.c (gen_enumeration_type_die): Add DW_AT_type if
+ enum_underlying_base_type defined and DWARF version > 3.
+ * langhooks.h (struct lang_hooks_for_types): Add
+ enum_underlying_base_type.
+ * langhooks-def.h (LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE): New define.
+ (LANG_HOOKS_FOR_TYPES_INITIALIZER): Add new lang hook.
+
+2014-03-21 Mark Wielaard <mjw@redhat.com>
+
* dwarf2out.c (gen_enumeration_type_die): Add DW_AT_const_value
as unsigned or int depending on type and value used.
@@ -1,3 +1,9 @@
+2014-03-21 Mark Wielaard <mjw@redhat.com>
+
+ PR debug/16063
+ * c-common.c (c_enum_underlying_base_type): New function.
+ * c-common.h (c_enum_underlying_base_type): Add declaration.
+
2014-03-22 Jakub Jelinek <jakub@redhat.com>
PR debug/60603
@@ -3902,6 +3902,14 @@ c_register_builtin_type (tree type, const char* name)
registered_builtin_types = tree_cons (0, type, registered_builtin_types);
}
+
+/* The C version of the enum_underlying_base_type langhook. */
+tree
+c_enum_underlying_base_type (const_tree type)
+{
+ return c_common_type_for_size (TYPE_PRECISION (type), TYPE_UNSIGNED (type));
+}
+
/* Print an error message for invalid operands to arith operation
CODE with TYPE0 for operand 0, and TYPE1 for operand 1.
@@ -832,6 +832,7 @@ extern void c_common_finish (void);
extern void c_common_parse_file (void);
extern alias_set_type c_common_get_alias_set (tree);
extern void c_register_builtin_type (tree, const char*);
+extern tree c_enum_underlying_base_type (const_tree);
extern bool c_promoting_integer_type_p (const_tree);
extern int self_promoting_args_p (const_tree);
extern tree strip_pointer_operator (tree);
@@ -1,3 +1,8 @@
+2014-03-21 Mark Wielaard <mjw@redhat.com>
+
+ PR debug/16063
+ * c-objc-common.h (LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE): Define.
+
2014-03-18 Manuel López-Ibáñez <manu@gcc.gnu.org>
PR c/55383
@@ -84,6 +84,8 @@ along with GCC; see the file COPYING3. If not see
#define LANG_HOOKS_TO_TARGET_CHARSET c_common_to_target_charset
#undef LANG_HOOKS_EXPR_TO_DECL
#define LANG_HOOKS_EXPR_TO_DECL c_expr_to_decl
+#undef LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE
+#define LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE c_enum_underlying_base_type
/* The C front end's scoping structure is very different from
that expected by the language-independent code; it is best
@@ -1,3 +1,9 @@
+2014-03-21 Mark Wielaard <mjw@redhat.com>
+
+ PR debug/16063
+ * cp-lang.c (cxx_enum_underlying_base_type): New function.
+ (LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE): Define.
+
2014-03-21 Paolo Carlini <paolo.carlini@oracle.com>
PR c++/60384
@@ -23,6 +23,7 @@ along with GCC; see the file COPYING3. If not see
#include "coretypes.h"
#include "tm.h"
#include "tree.h"
+#include "stor-layout.h"
#include "cp-tree.h"
#include "c-family/c-common.h"
#include "langhooks.h"
@@ -40,6 +41,7 @@ static enum classify_record cp_classify_record (tree type);
static tree cp_eh_personality (void);
static tree get_template_innermost_arguments_folded (const_tree);
static tree get_template_argument_pack_elems_folded (const_tree);
+static tree cxx_enum_underlying_base_type (const_tree);
/* Lang hooks common to C++ and ObjC++ are declared in cp/cp-objcp-common.h;
consequently, there should be very few hooks below. */
@@ -81,6 +83,8 @@ static tree get_template_argument_pack_elems_folded (const_tree);
#define LANG_HOOKS_EH_PERSONALITY cp_eh_personality
#undef LANG_HOOKS_EH_RUNTIME_TYPE
#define LANG_HOOKS_EH_RUNTIME_TYPE build_eh_type_type
+#undef LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE
+#define LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE cxx_enum_underlying_base_type
/* Each front end provides its own lang hook initializer. */
struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
@@ -219,5 +223,19 @@ get_template_argument_pack_elems_folded (const_tree t)
return fold_cplus_constants (get_template_argument_pack_elems (t));
}
+/* The C++ version of the enum_underlying_base_type langhook.
+ See also cp/semantics.c (finish_underlying_type). */
+static tree cxx_enum_underlying_base_type (const_tree type)
+{
+ tree underlying_type = ENUM_UNDERLYING_TYPE (type);
+
+ if (! ENUM_FIXED_UNDERLYING_TYPE_P (type))
+ underlying_type
+ = c_common_type_for_mode (TYPE_MODE (underlying_type),
+ TYPE_UNSIGNED (underlying_type));
+
+ return underlying_type;
+}
+
#include "gt-cp-cp-lang.h"
#include "gtype-cp.h"
@@ -17339,6 +17339,13 @@ gen_enumeration_type_die (tree type, dw_die_ref context_die)
TREE_ASM_WRITTEN (type) = 1;
add_byte_size_attribute (type_die, type);
+ if (lang_hooks.types.enum_underlying_base_type != NULL
+ && (dwarf_version >= 3 || !dwarf_strict))
+ {
+ tree underlying = lang_hooks.types.enum_underlying_base_type (type);
+ dw_die_ref underlying_die = base_type_die (underlying);
+ add_AT_die_ref (type_die, DW_AT_type, underlying_die);
+ }
if (TYPE_STUB_DECL (type) != NULL_TREE)
{
add_src_coords_attributes (type_die, TYPE_STUB_DECL (type));
@@ -173,6 +173,7 @@ extern tree lhd_make_node (enum tree_code);
#define LANG_HOOKS_GET_SUBRANGE_BOUNDS NULL
#define LANG_HOOKS_DESCRIPTIVE_TYPE NULL
#define LANG_HOOKS_RECONSTRUCT_COMPLEX_TYPE reconstruct_complex_type
+#define LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE NULL
#define LANG_HOOKS_FOR_TYPES_INITIALIZER { \
LANG_HOOKS_MAKE_TYPE, \
@@ -191,7 +192,8 @@ extern tree lhd_make_node (enum tree_code);
LANG_HOOKS_GET_ARRAY_DESCR_INFO, \
LANG_HOOKS_GET_SUBRANGE_BOUNDS, \
LANG_HOOKS_DESCRIPTIVE_TYPE, \
- LANG_HOOKS_RECONSTRUCT_COMPLEX_TYPE \
+ LANG_HOOKS_RECONSTRUCT_COMPLEX_TYPE, \
+ LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE \
}
/* Declaration hooks. */
@@ -137,6 +137,8 @@ struct lang_hooks_for_types
return values from functions. The argument TYPE is the top of the
chain, and BOTTOM is the new type which we will point to. */
tree (*reconstruct_complex_type) (tree, tree);
+
+ tree (*enum_underlying_base_type) (const_tree);
};
/* Language hooks related to decls and the symbol table. */
--
1.7.1