Files
scylladb/service
Kamil Braun aba31ad06c storage_service: use seastar::format instead of fmt::format
For some reason Scylla crashes on `aarch64` in release mode when calling
`fmt::format` in `raft_removenode` and `raft_decommission`. E.g. on this
line:
```
group0_command g0_cmd = _group0->client().prepare_command(std::move(change), guard, fmt::format("decomission: request decomission for {}", raft_server.id()));
```

I found this in our configure.py:
```
def get_clang_inline_threshold():
    if args.clang_inline_threshold != -1:
        return args.clang_inline_threshold
    elif platform.machine() == 'aarch64':
        # we see miscompiles with 1200 and above with format("{}", uuid)
        # also coroutine miscompiles with 600
        return 300
    else:
        return 2500
```
but reducing it to `0` didn't help.

I managed to get the following backtrace (with inline threshold 0):
```
void boost::intrusive::list_impl<boost::intrusive::mhtraits<seastar::thread_context, boost::intrusive::list_member_hook<>, &seastar::thread_context::_all_link>, unsigned long, false, void>::clear_and_dispose<boost::intrusive::detail::null_disposer>(boost::intrusive::detail::null_disposer) at /usr/include/boost/intrusive/list.hpp:751
 (inlined by) boost::intrusive::list_impl<boost::intrusive::mhtraits<seastar::thread_context, boost::intrusive::list_member_hook<>, &seastar::thread_context::_all_link>, unsigned long, false, void>::clear() at /usr/include/boost/intrusive/list.hpp:728
 (inlined by) ~list_impl at /usr/include/boost/intrusive/list.hpp:255
void fmt::v9::detail::buffer<wchar_t>::append<wchar_t>(wchar_t const*, wchar_t const*) at ??:?
void fmt::v9::detail::vformat_to<char>(fmt::v9::detail::buffer<char>&, fmt::v9::basic_string_view<char>, fmt::v9::basic_format_args<fmt::v9::basic_format_context<std::conditional<std::is_same<fmt::v9::type_identity<char>::type, char>::value, fmt::v9::appender, std::back_insert_iterator<fmt::v9::detail::buffer<fmt::v9::type_identity<char>::type> > >::type, fmt::v9::type_identity<char>::type> >, fmt::v9::detail::locale_ref) at ??:?
fmt::v9::vformat[abi:cxx11](fmt::v9::basic_string_view<char>, fmt::v9::basic_format_args<fmt::v9::basic_format_context<fmt::v9::appender, char> >) at ??:?
std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > fmt::v9::format<utils::tagged_uuid<raft::server_id_tag>&>(fmt::v9::basic_format_string<char, fmt::v9::type_identity<utils::tagged_uuid<raft::server_id_tag>&>::type>, utils::tagged_uuid<raft::server_id_tag>&) at /usr/include/fmt/core.h:3206
 (inlined by) service::storage_service::raft_removenode(utils::tagged_uuid<locator::host_id_tag>) at ./service/storage_service.cc:3572
```

Maybe it's a bug in `fmt` library?

In any case replacing the call with `::format` (i.e. `seastar::format`
from seastar/core/print.hh) helps.

Do it for the entire file for consistency (and avoiding this bug).

Also, for the future, replace `format` calls with `::format` - now it's
the same thing, but the latter won't clash with `std::format` once we
switch to libstdc++13.

Fixes #13707

Closes #13711
2023-05-05 19:23:22 +02:00
..
2023-04-21 14:18:59 +03:00