[Bug libstdc++/118811] SIGABRT (or ASAN heap-use-after-free) in chrono::locate_zone--chrono::tzdb_list during exit handlers

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118811

--- Comment #23 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jonathan Wakely <r...@gcc.gnu.org>:

https://gcc.gnu.org/g:99f57446e63b8ebeaeeae8dc48981cd5f1dfb831

commit r15-7645-g99f57446e63b8ebeaeeae8dc48981cd5f1dfb831
Author: Jonathan Wakely <jwak...@redhat.com>
Date:   Wed Feb 12 17:29:59 2025 +0000

    libstdc++: Use init_priority attribute for tzdb globals [PR118811]

    When linking statically to libstdc++.a (or to libstdc++_nonshared.a in
    the RHEL devtoolset compiler) there's a static initialization order
    problem where user code might be constructed before the
    std::chrono::tzdb_list globals, and so might try to use them after
    they've already been destroyed.

    Use the init_priority attribute on those globals so that they are
    initialized early. Since r15-7511-g4e7f74225116e7 we can disable the
    warnings for using a reserved priority using a diagnostic pragma.

    libstdc++-v3/ChangeLog:

            PR libstdc++/118811
            * src/c++20/tzdb.cc (tzdb_list::_Node): Use init_priority
            attribute on static data members.
            * testsuite/std/time/tzdb_list/pr118811.cc: New test.