On Tue, Nov 24, 2015 at 9:12 AM, Schlottke-Lakemper, Michael via cfe-users < cfe-users@lists.llvm.org> wrote:
> Short update: I thought the behavior reported below it might be related to > the fact that llvm-symbolizer picks up the “wrong” (i.e. the > msan-implemented) version of libc++ once I put it in the LD_LIBRARY_PATH. > Yes, I think that's what happening. > Thus I tried to compile a complete LLVM/Clang stack (with compiler-rt, > libcxx, libcxxabi, libomp) using -DLLVM_USE_SANITIZER=MemoryWithOrigins. > However, this did not work either, as apparently during the compilation > process the memory sanitizer already comes to life and complains about > use-of-unitialized values… Thus this approach seems to be a dead end. > > Michael > > On 24 Nov 2015, at 15:28 , Michael Schlottke-Lakemper < > m.schlottke-lakem...@aia.rwth-aachen.de> wrote: > > Hi folks, > > When running our msan-instrumented simulation program, instead of a proper > output I get the following error: > > ==12089==WARNING: MemorySanitizer: use-of-uninitialized-value > ==12089==WARNING: Can't read from symbolizer at fd 14 > /pds/opt/llvm/bin/llvm-symbolizer: symbol lookup error: > /pds/opt/libcxx-20151121-r253770-clang-msan/lib/libc++abi.so.1: undefined > symbol: __msan_origin_tls > ==12089==WARNING: external symbolizer didn't start up correctly! > > My setup for using the memory sanitizer is as follows: > - compile libc++/libc++abi with -fsanitize=memory > - compile test program with normal (=uninstrumented) LLVM/Clang > installation using -fsanitize=memory > - put instrumented libcxx/libcxxabi library dirs into LD_LIBRARY_PATH > > Can you pass -Wl,-rpath when you link your executable, to specify the path to instrumented libc++/libc++abi? > - run program > > Any idea what I am doing wrong? Thanks a lot in advance! > > Michael > > > > -- > Michael Schlottke-Lakemper > > Chair of Fluid Mechanics and Institute of Aerodynamics > RWTH Aachen University > Wüllnerstraße 5a > 52062 Aachen > Germany > > Phone: +49 (241) 80 95188 > Fax: +49 (241) 80 92257 > Mail: m.schlottke-lakem...@aia.rwth-aachen.de > Web: http://www.aia.rwth-aachen.de > > > > _______________________________________________ > cfe-users mailing list > cfe-users@lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users > > -- Alexey Samsonov vonos...@gmail.com
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