Hello Sergei, Thank you for the reply. I was trying with 10.2 and compiled with gcc-10.
Let me try with gcc 12. Thanks. Best Regards, Thejaka Amila Kanewala, PhD https://github.com/thejkane/agm http://valagamba.net/ On Thu, Aug 3, 2023 at 2:52 PM Sergei Golubchik <s...@mariadb.org> wrote: > Hi, Thejaka, > > On Aug 03, Thejaka Amila J Kanewala via developers wrote: > > Hello, > > > > I am trying to build and run a thread sanitized mysqld binary. In the > > CMake configuration, I see the WITH_ASAN option, however, I do not see > > an option to build mysqld with the thread sanitizer. > > What MariaDB version did you look at? > The earliest still supported is 10.4: > > This is WITH_ASAN option: > https://github.com/MariaDB/server/blob/10.4/CMakeLists.txt#L199 > > This is WITH_TSAN option: > https://github.com/MariaDB/server/blob/10.4/CMakeLists.txt#L223 > > > After making some custom configurations, I was able to build a mysqld > > binary with the thread sanitizer (by linking static thread sanitizer), > > however, when trying to run it, I got the following error: > > > > "ThreadSanitizer: sync allocator overflow (65536*1024). Dying." > > > > This error seems to be coming from the tsan library and seems this error > is > > caused by too many synchronizations [1]. Reducing the number of threads > > also didn't help me with this error. > > > > So my questions to you experts: > > 1. Do you run mysqld with the thread sanitizer ? > > No, our CI only runs with ASAN, MSAN, and UBSAN. > > > 2. If yes, could you please share the details. (e.g., CMake > > configurations, compiler/linker flags etc.) > > 3. If not, any suggestions to overcome the above error ? > > See above. I've just built with -DWITH_TSAN=ON and didn't get that error > of yours. On gcc 12.3.1. > > I did get a lot of > > warning: 'atomic_thread_fence' is not supported with > '-fsanitize=thread' > > which should've been expected, > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97868 > > And thread sanitizer was complaining about statistic_increment() macro, > which, indeed, increments a shared variable without any locks. > Intentionally, though. > > Regards, > Sergei > VP of MariaDB Server Engineering > and secur...@mariadb.org >
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