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From: "cvs-commit at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug dap/31263] [gdb] ThreadSanitizer: data race extension.c:755 in
 set_active_ext_lang(extension_language_defn const*)
Date: Wed, 28 Feb 2024 16:13:27 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D31263

--- Comment #5 from Sourceware Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Tom Tromey <tromey@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=3Dbinutils-gdb.git;h=3D8bb8f8346729=
c35433c961f7f1ed3a801776a362

commit 8bb8f8346729c35433c961f7f1ed3a801776a362
Author: Tom Tromey <tromey@adacore.com>
Date:   Fri Feb 23 08:59:40 2024 -0700

    Fix gdb.interrupt race

    gdb.interrupt was introduced to implement DAP request cancellation.
    However, because it can be run from another thread, and because I
    didn't look deeply enough at the implementation, it turns out to be
    racy.

    The fix here is to lock accesses to certain globals in extension.c.

    Note that this won't work in the case where configure detects that the
    C++ compiler doesn't provide thread support.  This version of the
    patch disables DAP entirely in this situation.

    Regression tested on x86-64 Fedora 38.  I also ran gdb.dap/pause.exp
    in a thread-sanitizer build tree to make sure the reported race is
    gone.

    Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=3D31263

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