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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug gdb/29286] SUMMARY: ThreadSanitizer: data race
 gdb/dwarf2/read.c:4100 in dw_expand_symtabs_matching_file_matcher
Date: Sat, 25 Jun 2022 09:57:30 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29286

--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
So in dw_expand_symtabs_matching_file_matcher we do:
...
      per_cu->mark =3D 0;
...
and in cooked_index::do_finalize:
...
      if ((entry->per_cu->lang !=3D language_cplus
           && entry->per_cu->lang !=3D language_ada)
          || (entry->flags & IS_LINKAGE) !=3D 0)
        entry->canonical =3D entry->name;
...
and in read.h, definition struct dwarf2_per_cu_data we have:
...
  /* A temporary mark bit used when iterating over all CUs in=20=20=20=20=
=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20
     expand_symtabs_matching.  */
  unsigned int mark : 1;
...
and:
...
  /* The language of this CU.  */
  ENUM_BITFIELD (language) lang : LANGUAGE_BITS;
...
so members of the same bitfield.

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