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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/29311] New: [gdb] ThreadSanitizer: data race
 (/lib64/libtsan.so.2+0x4c5e2) in free^M
Date: Fri, 01 Jul 2022 08:08:20 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29311

            Bug ID: 29311
           Summary: [gdb] ThreadSanitizer: data race
                    (/lib64/libtsan.so.2+0x4c5e2) in free^M
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

I build gdb with gcc 12.1.0 (system gcc) and -fsanitize=3Dthread on openSUSE
(with system glibc 2.35) Tumbleweed, and ran the testsuite, and ran into is=
sues
with gdb.ada/char_enum_unicode.exp:
...
WARNING: ThreadSanitizer: data race (pid=3D21301)^M
  Write of size 8 at 0x7b2000008080 by main thread:^M
    #0 free <null> (libtsan.so.2+0x4c5e2)^M
    #1 _dl_close_worker <null> (ld-linux-x86-64.so.2+0x4b7b)^M
    #2 convert_between_encodings(char const*, char const*, unsigned char
const*, unsigned int, int, obstack*, transliterations)
/data/vries/gdb_versions/devel/src/gdb/charset.c:584 (gdb+0x64fc37)^M
  ...
^M
  Previous write of size 8 at 0x7b2000008080 by thread T1:^M
    [failed to restore the stack]^M
...

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