[infra] build msan version of libcxx into /usr/msan/lib (#59).

infra/base-images/base-clang/checkout_build_install_llvm.sh

@@ -25,7 +25,7 @@ cd $SRC/llvm/projects && git clone --depth 1 http://llvm.org/git/compiler-rt.git
 cd $SRC/llvm/projects && git clone --depth 1 http://llvm.org/git/libcxx.git
 cd $SRC/llvm/projects && git clone --depth 1 http://llvm.org/git/libcxxabi.git
 
-# Build & Install
+# Build & install
 mkdir -p $WORK/llvm
 cd $WORK/llvm
 cmake -G "Ninja" \
@@ -36,6 +36,18 @@ ninja
 ninja install
 rm -rf $WORK/llvm
 
+mkdir -p $WORK/msan
+cd $WORK/msan
+cmake -G "Ninja" \
+      -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ \
+      -DLLVM_USE_SANITIZER=Memory -DCMAKE_INSTALL_PREFIX=/usr/msan/ \
+      -DLIBCXX_ENABLE_SHARED=OFF -DLIBCXX_ENABLE_STATIC_ABI_LIBRARY=ON \
+      -DCMAKE_BUILD_TYPE=Release -DLLVM_TARGETS_TO_BUILD="X86" \
+      $SRC/llvm
+ninja cxx
+ninja install-cxx
+rm -rf $WORK/msan
+
 # Copy libfuzzer sources
 mkdir $SRC/libfuzzer
 cp -r $SRC/llvm/lib/Fuzzer/* $SRC/libfuzzer/

infra/base-images/base-libfuzzer/compile

@@ -24,9 +24,17 @@ fi
 
 bash compile_${FUZZING_ENGINE}
 
+if [[ $SANITIZER_FLAGS = *sanitize=memory* ]]
+then
+  # Take all libraries from lib/msan
+  export CXXFLAGS_EXTRA="-L/usr/msan/lib $CXXFLAGS_EXTRA"
+  ls -alR /usr/msan/lib
+fi
+
 export CFLAGS="$CFLAGS $SANITIZER_FLAGS $COVERAGE_FLAGS"
 export CXXFLAGS="$CFLAGS $CXXFLAGS_EXTRA"
 
+
 echo "CC=$CC"
 echo "CXX=$CXX"
 echo "CFLAGS=$CFLAGS"