> I'll mark this as "returned with feedback". I'd be happy to take a patch > that helps to reduce sanitizer complaints, but this seems to need some work. > > Aleksander, how did you run the sanitizer? I tried to build with clang > 4.0, with the -fsanitize=memory option, and ran "make > installcheck-parallel", but I didn't get any sanitizer errors out of it. > I did get some errors, from failing to load "regress.so", though: > > ERROR: could not load library > "/home/heikki/git-sandbox-pgsql/master/src/test/regress/regress.so": > /home/heikki/git-sandbox-pgsql/master/src/test/regress/regress.so: > undefined symbol: __msan_va_arg_overflow_size_tls > > How did you do it?
It's quite simple actually . I've just re-checked on Ubuntu 16.04 and Clang 3.8: ``` sudo apt-get install clang git make flex bison libreadline-dev \ zlib1g-dev jade git clone http://git.postgresql.org/git/postgresql.git cd postgresql CC=/usr/bin/clang CFLAGS="-fsanitize=memory -fPIE -pie" ./configure make -j4 -s MSAN_SYMBOLIZER_PATH=/usr/bin/llvm-symbolizer-3.8 make check ``` Stacktraces are written to src/test/regress/log/initdb.log. You can add `printf("%d\n", getpid())` and `sleep(1000)` calls somewhere in main() procedure. It will give you some time to connect using debugger. IIRC it's what I did.  http://clang.llvm.org/docs/MemorySanitizer.html  https://github.com/google/sanitizers/wiki/MemorySanitizer -- Best regards, Aleksander Alekseev -- Sent via pgsql-hackers mailing list (firstname.lastname@example.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers