BTF generation currently relies on the internal CTF representation to
convert debug info from DWARF dies. This patch adds a new internal
header, "ctf-int.h", which defines CTF kinds to be used internally to
represent BTF tags which must pass through the CTF container. It also
adds a new type for representing information specific to those tags, and
a member for that type in struct ctf_dtdef.
This patch also updates ctf_add_reftype to accept a const char * name,
and add it for the newly added type.
gcc/
* ctf-int.h: New file.
* ctfc.h: Include ctf-int.h.
(struct ctf_btf_annotation): New.
(struct ctf_dtdef): Add dtu_btfnote member to dtd_u union.
(enum ctf_dtu_d_union_enum): Add CTF_DTU_D_BTFNOTE.
(ctf_add_reftype): Add name argument.
* ctfc.cc (ctf_dtu_d_union_selector): Handle CTFC_INT_K_DECL_TAG.
(ctf_add_reftype): Add name argument. Pass it to ctf_add_generic.
(ctf_add_pointer): Update ctf_add_reftype call.
* btfout.cc (btf_init_postprocess): Update ctf_add_reftype call.
* dwarf2ctf.cc (gen_ctf_modifier_type): Update ctf_add_reftype call.
---
gcc/btfout.cc | 2 +-
gcc/ctf-int.h | 28 ++++++++++++++++++++++++++++
gcc/ctfc.cc | 10 ++++++----
gcc/ctfc.h | 17 ++++++++++++++---
gcc/dwarf2ctf.cc | 2 +-
5 files changed, 50 insertions(+), 9 deletions(-)
create mode 100644 gcc/ctf-int.h
diff --git a/gcc/btfout.cc b/gcc/btfout.cc
index e07fed302c2..e6acf4e51a5 100644
--- a/gcc/btfout.cc
+++ b/gcc/btfout.cc
@@ -1302,7 +1302,7 @@ btf_init_postprocess (void)
/* Create the 'const' modifier type for void. */
if (constvoid_id == CTF_NULL_TYPEID)
- constvoid_id = ctf_add_reftype (tu_ctfc, CTF_ADD_ROOT,
+ constvoid_id = ctf_add_reftype (tu_ctfc, CTF_ADD_ROOT, NULL,
dvd->dvd_type, CTF_K_CONST, NULL);
dvd->dvd_type = constvoid_id;
}
diff --git a/gcc/ctf-int.h b/gcc/ctf-int.h
new file mode 100644
index 00000000000..d5586248f11
--- /dev/null
+++ b/gcc/ctf-int.h
@@ -0,0 +1,28 @@
+/* ctf-int.h - GCC internal definitions used for CTF debug info.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#ifndef GCC_CTF_INT_H
+#define GCC_CTF_INT_H 1
+
+/* This CTF kind exists only as a bridge to generating BTF types for
+ BTF_KIND_DECL_TAG. It does not correspond to any representable type
+ kind in CTF. */
+#define CTFC_INT_K_DECL_TAG 63
+
+#endif /* GCC_CTF_INT_H */
diff --git a/gcc/ctfc.cc b/gcc/ctfc.cc
index ee569b12ac6..ccf090d0567 100644
--- a/gcc/ctfc.cc
+++ b/gcc/ctfc.cc
@@ -107,6 +107,8 @@ ctf_dtu_d_union_selector (ctf_dtdef_ref ctftype)
return CTF_DTU_D_ARGUMENTS;
case CTF_K_SLICE:
return CTF_DTU_D_SLICE;
+ case CTFC_INT_K_DECL_TAG:
+ return CTF_DTU_D_BTFNOTE;
default:
/* The largest member as default. */
return CTF_DTU_D_ARRAY;
@@ -428,15 +430,15 @@ ctf_add_encoded (ctf_container_ref ctfc, uint32_t flag,
const char * name,
}
ctf_id_t
-ctf_add_reftype (ctf_container_ref ctfc, uint32_t flag, ctf_id_t ref,
- uint32_t kind, dw_die_ref die)
+ctf_add_reftype (ctf_container_ref ctfc, uint32_t flag, const char * name,
+ ctf_id_t ref, uint32_t kind, dw_die_ref die)
{
ctf_dtdef_ref dtd;
ctf_id_t type;
gcc_assert (ref <= CTF_MAX_TYPE);
- type = ctf_add_generic (ctfc, flag, NULL, &dtd, die);
+ type = ctf_add_generic (ctfc, flag, name, &dtd, die);
dtd->dtd_data.ctti_info = CTF_TYPE_INFO (kind, flag, 0);
/* Caller of this API must guarantee that a CTF type with id = ref already
exists. This will also be validated for us at link-time. */
@@ -548,7 +550,7 @@ ctf_id_t
ctf_add_pointer (ctf_container_ref ctfc, uint32_t flag, ctf_id_t ref,
dw_die_ref die)
{
- return (ctf_add_reftype (ctfc, flag, ref, CTF_K_POINTER, die));
+ return (ctf_add_reftype (ctfc, flag, NULL, ref, CTF_K_POINTER, die));
}
ctf_id_t
diff --git a/gcc/ctfc.h b/gcc/ctfc.h
index bf1841a7fcb..b9c6a44545b 100644
--- a/gcc/ctfc.h
+++ b/gcc/ctfc.h
@@ -35,6 +35,7 @@ along with GCC; see the file COPYING3. If not see
#include "dwarf2ctf.h"
#include "ctf.h"
#include "btf.h"
+#include "ctf-int.h"
/* Invalid CTF type ID definition. */
@@ -151,6 +152,13 @@ typedef struct GTY (()) ctf_func_arg
#define ctf_farg_list_next(elem) ((ctf_func_arg_t *)((elem)->farg_next))
+/* BTF support: a BTF type tag or decl tag. */
+
+typedef struct GTY (()) ctf_btf_annotation
+{
+ uint32_t component_idx;
+} ctf_btf_annotation_t;
+
/* Type definition for CTF generation. */
struct GTY ((for_user)) ctf_dtdef
@@ -175,6 +183,8 @@ struct GTY ((for_user)) ctf_dtdef
ctf_func_arg_t * GTY ((tag ("CTF_DTU_D_ARGUMENTS"))) dtu_argv;
/* slice. */
ctf_sliceinfo_t GTY ((tag ("CTF_DTU_D_SLICE"))) dtu_slice;
+ /* btf annotation. */
+ ctf_btf_annotation_t GTY ((tag ("CTF_DTU_D_BTFNOTE"))) dtu_btfnote;
} dtd_u;
};
@@ -214,7 +224,8 @@ enum ctf_dtu_d_union_enum {
CTF_DTU_D_ARRAY,
CTF_DTU_D_ENCODING,
CTF_DTU_D_ARGUMENTS,
- CTF_DTU_D_SLICE
+ CTF_DTU_D_SLICE,
+ CTF_DTU_D_BTFNOTE
};
enum ctf_dtu_d_union_enum
@@ -404,8 +415,8 @@ extern bool ctf_dvd_ignore_lookup (const ctf_container_ref
ctfc,
extern const char * ctf_add_string (ctf_container_ref, const char *,
uint32_t *, int);
-extern ctf_id_t ctf_add_reftype (ctf_container_ref, uint32_t, ctf_id_t,
- uint32_t, dw_die_ref);
+extern ctf_id_t ctf_add_reftype (ctf_container_ref, uint32_t, const char *,
+ ctf_id_t, uint32_t, dw_die_ref);
extern ctf_id_t ctf_add_enum (ctf_container_ref, uint32_t, const char *,
HOST_WIDE_INT, bool, dw_die_ref);
extern ctf_id_t ctf_add_slice (ctf_container_ref, uint32_t, ctf_id_t,
diff --git a/gcc/dwarf2ctf.cc b/gcc/dwarf2ctf.cc
index b2945713036..549b0cb2dc1 100644
--- a/gcc/dwarf2ctf.cc
+++ b/gcc/dwarf2ctf.cc
@@ -511,7 +511,7 @@ gen_ctf_modifier_type (ctf_container_ref ctfc, dw_die_ref
modifier)
gcc_assert (kind != CTF_K_MAX);
/* Now register the modifier itself. */
if (!ctf_type_exists (ctfc, modifier, &modifier_type_id))
- modifier_type_id = ctf_add_reftype (ctfc, CTF_ADD_ROOT,
+ modifier_type_id = ctf_add_reftype (ctfc, CTF_ADD_ROOT, NULL,
qual_type_id, kind,
modifier);
--
2.40.1
