From b7e215a8ee81d44281d9e0a2a25eceb47b6911dd Mon Sep 17 00:00:00 2001 From: Indu Bhagat Date: Thu, 20 May 2021 11:15:52 -0700 Subject: CTF/BTF debug formats This commit introduces support for generating CTF debugging information and BTF debugging information from GCC. 2021-06-28 Indu Bhagat David Faust Jose E. Marchesi Weimin Pan 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. --- gcc/dwarf2ctf.h | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 gcc/dwarf2ctf.h (limited to 'gcc/dwarf2ctf.h') diff --git a/gcc/dwarf2ctf.h b/gcc/dwarf2ctf.h new file mode 100644 index 0000000..a3cf567 --- /dev/null +++ b/gcc/dwarf2ctf.h @@ -0,0 +1,53 @@ +/* dwarf2ctf.h - DWARF interface for CTF/BTF generation. + Copyright (C) 2021 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 +. */ + +/* This file contains declarations and prototypes to define an interface + between DWARF and CTF/BTF generation. */ + +#ifndef GCC_DWARF2CTF_H +#define GCC_DWARF2CTF_H 1 + +#include "dwarf2out.h" + +/* Debug Format Interface. Used in dwarf2out.c. */ + +extern void ctf_debug_init (void); +extern void ctf_debug_init_postprocess (bool); +extern bool ctf_do_die (dw_die_ref); +extern void ctf_debug_finalize (const char *, bool); + +/* Wrappers for CTF/BTF to fetch information from GCC DWARF DIE. Used in + ctfc.c. + + A CTF container does not store all debug information internally. Some of + the info is fetched indirectly via the DIE reference available in each CTF + container entry. + + These functions will be used by the CTF container to give access to its + consumers (CTF/BTF) to various debug information available in DWARF DIE. + Direct access to debug information in GCC dwarf structures by the consumers + of CTF/BTF information is not ideal. */ + +/* Source location information. */ + +extern const char * ctf_get_die_loc_file (dw_die_ref); +extern unsigned int ctf_get_die_loc_line (dw_die_ref); +extern unsigned int ctf_get_die_loc_col (dw_die_ref); + +#endif /* GCC_DWARF2CTF_H */ -- cgit v1.1