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<div style="word-wrap: break-word;" class="">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.<span class="HOEnZb"><font color="#888888" class="">
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<div class=""><span class="HOEnZb"><font color="#888888" class="">Michael</font></span>
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<div class="">On 24 Nov 2015, at 15:28 , Michael Schlottke-Lakemper <<a href="mailto:m.schlottke-lakemper@aia.rwth-aachen.de" target="_blank" class="">m.schlottke-lakemper@aia.rwth-aachen.de</a>> wrote:</div>
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<div style="word-wrap: break-word;" class="">Hi folks,
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<div class="">When running our msan-instrumented simulation program, instead of a proper output I get the following error:</div>
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<div class="">==12089==WARNING: MemorySanitizer: use-of-uninitialized-value</div>
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<div class="">==12089==WARNING: Can't read from symbolizer at fd 14</div>
<div class="">/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</div>
<div class="">==12089==WARNING: external symbolizer didn't start up correctly!</div>
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<div class="">My setup for using the memory sanitizer is as follows:</div>
<div class="">- compile libc++/libc++abi with -fsanitize=memory</div>
<div class="">- compile test program with normal (=uninstrumented) LLVM/Clang installation using -fsanitize=memory</div>
<div class="">- put instrumented libcxx/libcxxabi library dirs into LD_LIBRARY_PATH</div>
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<div class="">Can you pass -Wl,-rpath when you link your executable, to specify the path to instrumented libc++/libc++abi?</div>
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<div>Yes, and if I do that together with setting LD_LIBRARY_PATH=“”, it works, thanks. The problem with this approach, however, is that on our cluster installation, LD_LIBRARY_PATH by default includes LLVM’s lib dir. If I want the MemorySanitizer to work for
all users, I somehow need to find another way that may involve *adding* paths to LD_LIBRARY_PATH, but not removing them. Any idea how I could achieve this?</div>
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<div>Thanks,</div>
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<div>Michael</div>
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