Translate DW_TAG_GNU_annotation DIEs created for C attributes
btf_decl_tag and btf_type_tag into an in-memory representation in the
CTF/BTF container. They will be output in BTF as BTF_KIND_DECL_TAG and
BTF_KIND_TYPE_TAG records.
The new CTF kinds used to represent these annotations, CTF_K_DECL_TAG
and CTF_K_TYPE_TAG, are expected to be formalized in the next version of
the CTF specification. For now they only exist in memory as a
translation step to BTF, and are not emitted when generating CTF
information.
gcc/
* ctfc.cc (ctf_dtu_d_union_selector): Handle CTF_K_DECL_TAG and
CTF_K_TYPE_TAG.
(ctf_add_type_tag, ctf_add_decl_tag): New.
(ctf_add_variable): Return the new ctf_dvdef_ref rather than zero.
(new_ctf_container): Initialize new members.
(ctfc_delete_container): Deallocate new members.
* ctfc.h (ctf_dvdef, ctf_dvdef_t, ctf_dvdef_ref): Move forward
declarations earlier in file.
(ctf_decl_tag_t): New typedef.
(ctf_dtdef): Add ctf_decl_tag_t member to dtd_u union.
(ctf_dtu_d_union_enum): Add new CTF_DTU_D_TAG enumerator.
(ctf_container): Add ctfc_tags vector and ctfc_type_tags_map hash_map
members.
(ctf_add_type_tag, ctf_add_decl_tag): New function protos.
(ctf_add_variable): Change prototype return type to ctf_dvdef_ref.
* dwarf2ctf.cc (gen_ctf_type_tags, gen_ctf_decl_tags)
(gen_ctf_decl_tags_for_var): New static functions.
(gen_ctf_pointer_type): Handle type tags.
(gen_ctf_sou_type): Handle decl tags.
(gen_ctf_function_type): Likewise.
(gen_ctf_variable): Likewise.
(gen_ctf_function): Likewise.
(gen_ctf_type): Handle TAG_GNU_annotation DIEs.
gcc/testsuite/
* gcc.dg/debug/ctf/ctf-decl-tag-1.c: New test.
* gcc.dg/debug/ctf/ctf-type-tag-1.c: New test.
include/
* ctf.h (CTF_K_DECL_TAG, CTF_K_TYPE_TAG): New defines.
This patch updates include/ctf.h to match the current libctf version in
binutils' include/. I recently attempted to build a uber tree (following
some notes that are so old they used CVS) and noticed that binutils won't
build with gcc's top-level include, due to CTF_F_IDXSORTED not being
defined in ctf.h.
2023-04-28 Roger Sayle <roger@nextmovesoftware.com>
include/ChangeLog
* ctf.h: Import latest version from binutils/libctf.
This commit introduces support for generating CTF debugging
information and BTF debugging information from GCC.
2021-06-28 Indu Bhagat <indu.bhagat@oracle.com>
David Faust <david.faust@oracle.com>
Jose E. Marchesi <jose.marchesi@oracle.com>
Weimin Pan <weimin.pan@oracle.com>
gcc/
* Makefile.in: Add ctfc.*, ctfout.c and btfout.c files to
GTFILES. Add new object files.
* common.opt: Add CTF and BTF debug info options.
* btfout.c: New file.
* ctfc.c: Likewise.
* ctfc.h: Likewise.
* ctfout.c: Likewise.
* dwarf2ctf.c: Likewise.
* dwarf2ctf.h: Likewise.
* dwarf2cfi.c (dwarf2out_do_frame): Acknowledge CTF_DEBUG and
BTF_DEBUG.
* dwarf2out.c (dwarf2out_source_line): Likewise.
(dwarf2out_finish): Skip emitting DWARF if CTF or BTF are to
be generated.
(debug_format_do_cu): New function.
(dwarf2out_early_finish): Traverse DIEs and emit CTF/BTF for
them if requested.
Include dwarf2ctf.c.
* final.c (dwarf2_debug_info_emitted_p): Acknowledge DWARF-based debug
formats.
* flag-types.h (enum debug_info_type): Add CTF_DEBUG and BTF_DEBUG.
(CTF_DEBUG): New bitmask.
(BTF_DEBUG): Likewise.
(enum ctf_debug_info_levels): New enum.
* gengtype.c (open_base_files): Handle ctfc.h.
(main): Handle uint32_t type.
* flags.h (btf_debuginfo_p): New definition.
(dwarf_based_debuginfo_p): Likewise.
* opts.c (debug_type_names): Add entries for CTF and BTF.
(btf_debuginfo_p): New function.
(dwarf_based_debuginfo_p): Likewise.
(common_handle_option): Handle -gctfN and -gbtf options.
(set_debug_level): Set CTF_DEBUG, BTF_DEBUG whenever appropriate.
* toplev.c (process_options): Inform the user and ignore -gctfLEVEL if
frontend is not C.
include/
* ctf.h: New file.
* btf.h: Likewise.
libiberty/
* simple-object.c (handle_lto_debug_sections): Copy over .ctf
sections.
