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c8133969ad
The CTF debug info reader is the last user of partial symtabs. Being a fairly limited debug info format, CTF only uses a fraction of the psymtab features. So I see 3 ways forward: - keep psymtabs but trim them down, removing everything not useful for CTF - make the CTF reader implement its own index-like structure that implements the quick_symbol_functions interface (which would presumably be a small subset of partial symtabs) - make the CTF reader skip partial symtabs, create full symtabs directly My hypothesis is that CTF debug info is typically small enough and fast enough to process that it's not worth it to bother with an intermediate step before full symbols. But I will need help to see if this is true, I'm not sure what representatively big C project I can build with CTF debug info. I tried to build the Linux kernel with -gctf, but I got plenty of warnings like: ld: warning: orphan section `.ctf' from `vmlinux.o' being placed in section `.ctf' GDB is still able to load the resulting ELF, and there are about 150k calls to ctf_add_type_cb. Before this patch, elfctf_build_psymtabs takes anywhere between 300-350 ms. With this patch, it's around 400 ms. Implementation -------------- This patch gets rid of the ctf_psymtab step, creating full symtabs from the start. The entry point elfctf_build_psymtabs gets renamed to elfctf_build_symtabs. Everything related to ctf_psymtab or partial symtabs is removed. The build_ctf_archive_member function nows contains the code to build a full symtab out of one CTF dict. This code is not new for the most part, it has been moved from other functions that used to be called when expanding one symtab. Change-Id: I728c1ef35785218c178fb467b80db71d59269a6d Approved-By: Tom Tromey <tom@tromey.com>
25 lines
911 B
C
25 lines
911 B
C
/* CTF debugging format support for GDB.
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Copyright (C) 2019-2026 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef GDB_CTFREAD_H
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#define GDB_CTFREAD_H
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extern void elfctf_build_symtabs (struct objfile *objfile);
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#endif /* GDB_CTFREAD_H */
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