Clang linker error while compiling with AddressSanitizer

[vishalchebrolu]

I installed Clang along with LLVM. I'm trying to understand ASAN. When I try running clang along with ASAN flag like:

clang -fsanitize=address <file_name>

I get the following error
ld: file not found: /Users/vishal/Desktop/llvm/llvmproject/build/lib/clang/11.0.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib
clang-11: error: linker command failed with exit code 1 (use -v to see invocation)

Clang Version:
clang version 11.0.0 (https://github.com/llvm/llvm-project.git b780df052dd2b246a760d00e00f7de9ebdab9d09) Target: x86_64-apple-darwin18.0.0 Thread model: posix InstalledDir: /Users/vishal/Desktop/llvm/llvm-project/build/bin/.

I see it's an issue with the linker. ASAN instrumented LLVM IR is being produced without any error. The issue seems to be linking the ASAN run-time library using Clang.

I looked through the directory:
/Users/vishal/Desktop/llvm/llvmproject/build/lib/clang/11.0.0/
I couldn't find any folder named "lib" through which the linker is searching. Only one folder named "include" exists.

Is this a known issue or an installation problem?
How can I get over this and compile programs with address sanitizer?

[mas2tg]

Hey, I was having a similar issue the other day (yesterday) and I was able to compile my program in my Mac using the next flags. Let me know if this works for you!

-L/Library/Developer/CommandLineTools/usr/lib/clang/11.0.0/lib/darwin
-lSystem /Library/Developer/CommandLineTools/usr/lib/clang/11.0.0/lib/darwin/libclang_rt.asan_osx_dynamic.dylib

[vishalchebrolu]

No, it didn't work for me. Actually there's no directory named "11.0.0" inside /Library/Developer/CommandLineTools/usr/lib/clang/. Instead, there exists "10.0.1" directory, which I guess is Apple Clang.

I want to change the code of AddressSanitizer to do the instrumentation differently. So I'll need to deal with the AddressSanitizer file built out from LLVM code base and not the Apple Clang one.