Asan/Tsan/Msan

[dionescu]

Is there a way to use Asan/Tsan/Msan with this toolchain? When I try (e.g. asan) I get an error:

chromium_ld: error: cannot open external/co_vsco_bazel_toolchains/tools/cpp/tool_wrappers/lib/clang/6.0.0/lib/linux/libclang_rt.asan-x86_64.a: No such file or directory

For some reason, chromium_ld is looking for libclang_rt.asan-x86_64.a under external/co_vsco_bazel_toolchains/tools/cpp/tool_wrappers instead of external/org_chromium_clang_linux_x64/...

[dionescu]

I manged to get libc++ compiled under the sanitizers by passing extra flags in libcxx.bzl and everything appears to work correctly. The configuration I use is slightly different so I'm not sure why the linking error above happens. In any case, it would be very useful if this toolchain would support the sanitizers out of the box.

[jlisee]

@dionescu what flags did you have to pass?