libcxx-msan

• A bash script to build the LLVM libc++ with memory sanitizer instrumentation

• A bash script to be sourced in order to use the instrumented libc++

How to use it

1. build the instrumented libc++:

export CC=clang
export CXX=clang++
./build.sh

feel free to change CC and CXX with you favorite clang version

• load the environment to make clang use the instrumented libc++:

source load-environment

Now you are ready to go. You can compile your program using the memory sanitizer. E.g.

$CXX -stdlib=libc++ -fsanitize=memory test.cpp -o test

Important: don't forget to pass -stdlib=libc++. Otherwise clang might use the GNU libstdc++ (default on Linux).