Hi folks, trying to build a llvm toolchain with memory sanitized libc,libc++ system libraries , I have tried following steps
- Build llvm toolchain for bootstrapping
- cd ~/msan-sandbox
- git clone GitHub - llvm/llvm-project: The LLVM Project is a collection of modular and reusable compiler and toolchain technologies.
- cd llvm-project
- mkdir -p build && cd build
- cmake -G “Ninja” -DLLVM_ENABLE_PROJECTS=“clang;compiler-rt” -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/home/ubuntu/msan-sandbox/llvm-bootstrap …/llvm
- ninja
- ninja install
- Build un-sanitized llvm-tblgen (had to do this as this intermediate tool must be an un-sanitized one for rest of the process to work correctly)
- mkdir llvm-tblgen-build && cd llvm-tblgen-build
- cmake -G Ninja -DLLVM_ENABLE_PROJECTS=“llvm” -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/home/ubuntu/msan-sandbox/llvm-tblgen-install …/llvm
- ninja llvm-tblgen
- ninja install
- Build msan-toolchain using the bootstrap llvm toolchain from step 1 and un-sanitized tblgen from step 2
- cmake -G Ninja -DLLVM_ENABLE_PROJECTS=“clang;compiler-rt” -DLLVM_ENABLE_RUNTIMES=“libcxx;libcxxabi” -DLLVM_USE_SANITIZER=Memory -DCMAKE_C_COMPILER=/home/ubuntu/msan-sandbox/llvm-bootstrap/bin/clang -DCMAKE_CXX_COMPILER=/home/ubuntu/msan-sandbox/llvm-bootstrap/bin/clang++ -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/home/ubuntu/msan-sandbox/llvm-msan -DLLVM_TABLEGEN=/home/ubuntu/msan-sandbox/llvm-tblgen-install/bin/llvm-tblgen -DLLVM_TARGETS_TO_BUILD=“X86;ARM;AArch64” …/llvm
- cmake configures correctly but when I run “ninja” command I see a spew of errors like
/home/ubuntu/msan-sandbox/llvm-project/llvm/include/llvm/Support/Compiler.h:523:11: fatal error: 'sanitizer/msan_interface.h' file not found 523 | # include <sanitizer/msan_interface.h>,
any suggestions or pointers to get past this and be able to build a truly msan supporting toolchain (for both x86, arm) with sanitized libraries is highly appreciated, thanks.