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From: "dmitry.neverov at jetbrains dot com"
 <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug symtab/30520] Slow lookup_symbol_in_objfile
Date: Wed, 07 Jun 2023 09:50:50 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D30520

--- Comment #4 from Dmitry Neverov <dmitry.neverov at jetbrains dot com> ---
With 'set debug symtab-create 1' gdb produces ~450Mb of logs between these 2
entries:

2023-06-06 10:54:51,286 <&"    [symbol-lookup] lookup_symbol_in_objfile:
lookup_symbol_in_objfile (_pcbnew.kiface, GLOBAL_BLOCK, wxObjectDataPtr,
VAR_DOMAIN)\n"
2023-06-06 10:55:50,418 <&"    [symbol-lookup] lookup_symbol_in_objfile:
lookup_symbol_in_objfile (...) =3D NULL\n"

All log entries are of the form like these:

<&"    [symtab-create] start_subfile: name =3D
/usr/include/x86_64-linux-gnu/c++/12/bits/c++config.h, name_for_id =3D
/usr/include/x86_64-linux-gnu/c++/12/bits/c++config.h\n"
<&"    [symtab-create] start_subfile: found existing symtab with name_for_id
/usr/include/x86_64-linux-gnu/c++/12/bits/c++config.h\n"

There are 1134332 '[symtab-create] start_subfile: name =3D ...' entries tot=
al,
707543 of them result in 'found existing symtab', 426789 don't find an exis=
ting
symtab.

There are 3519 unique names for symtab-create.

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