Hi gophers! I am trying to integrate -msan for testing into https://github.com/go-clang/bootstrap using Go 1.7.1 and LLVM 3.9.0 inside an Ubuntu Trusty 64bit VM. The Kernel is 3.13.0.
I am executing a test using the following command: CC=clang CGO_LDFLAGS="-L`llvm-config --libdir` -fsanitize=memory" > CGO_CPPFLAGS='-fsanitize=memory -fsanitize-memory-track-origins > -fno-omit-frame-pointer' go test -timeout 60s -v -msan > -test.run=TestBasicParsing > And the address sanitizer detects a problem for this test giving me the following output: Uninitialized bytes in __interceptor_memchr at offset 6 inside > [0x70800000bf58, 7) > ==32156==WARNING: MemorySanitizer: use-of-uninitialized-value > #0 0x7fdbcc7e3c85 > (/usr/lib/x86_64-linux-gnu/libLLVM-3.9.so.1+0x653c85) > #1 0x7fdbcc7f40a7 > (/usr/lib/x86_64-linux-gnu/libLLVM-3.9.so.1+0x6640a7) > #2 0x7fdbd0723bbe > (/usr/lib/x86_64-linux-gnu/libclang-3.9.so.1+0xc05bbe) > #3 0x7fdbd07334ca > (/usr/lib/x86_64-linux-gnu/libclang-3.9.so.1+0xc154ca) > #4 0x7fdbcffaef39 > (/usr/lib/x86_64-linux-gnu/libclang-3.9.so.1+0x490f39) > #5 0x7fdbcff8c504 > (/usr/lib/x86_64-linux-gnu/libclang-3.9.so.1+0x46e504) > #6 0x7fdbcfd8178e > (/usr/lib/x86_64-linux-gnu/libclang-3.9.so.1+0x26378e) > #7 0x7fdbcc7be314 > (/usr/lib/x86_64-linux-gnu/libLLVM-3.9.so.1+0x62e314) > #8 0x7fdbcc7be393 > (/usr/lib/x86_64-linux-gnu/libLLVM-3.9.so.1+0x62e393) > #9 0x7fdbcc8214bc > (/usr/lib/x86_64-linux-gnu/libLLVM-3.9.so.1+0x6914bc) > #10 0x7fdbcf908183 (/lib/x86_64-linux-gnu/libpthread.so.0+0x8183) > #11 0x7fdbced0d37c (/lib/x86_64-linux-gnu/libc.so.6+0xfa37c) > > Uninitialized value was stored to memory at > #0 0x42d0d5 > (/tmp/go-build816629300/github.com/go-clang/bootstrap/clang/_test/clang.test+0x42d0d5) > #1 0x7fdbcbf479bd (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0xbb9bd) > > Uninitialized value was stored to memory at > #0 0x42d0d5 > (/tmp/go-build816629300/github.com/go-clang/bootstrap/clang/_test/clang.test+0x42d0d5) > #1 0x7fdbcbf46e2f (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0xbae2f) > > Uninitialized value was created by a heap allocation > #0 0x42b6d9 > (/tmp/go-build816629300/github.com/go-clang/bootstrap/clang/_test/clang.test+0x42b6d9) > #1 0x7fdbcbeeadac (/usr/lib/x86_64-linux-gnu/libstdc++.so.6+0x5edac) > > SUMMARY: MemorySanitizer: use-of-uninitialized-value > (/usr/lib/x86_64-linux-gnu/libLLVM-3.9.so.1+0x653c85) > I have the following questions concerning the usage of the -msan flag: a.) Are these the preferred arguments to use the -msan flag? b.) Why are there no line numbers in the traces? c.) Any advice on how I can debug such problems? d.) What are the official minimum requirements for the -msan flag? (LLVM >= 3.8? ...?) I appreciate any input since I am completely lost on how to address this problem :-/ Cheers, Markus -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
