rust/src/build_helper
kennytm 00dff0aa59
Support AddressSanitizer and ThreadSanitizer on x86_64-apple-darwin.
ASan and TSan are supported on macOS, and this commit enables their
support.

The sanitizers are always built as *.dylib on Apple platforms, so they
cannot be statically linked into the corresponding `rustc_?san.rlib`. The
dylibs are directly copied to `lib/rustlib/x86_64-apple-darwin/lib/`
instead.

Note, although Xcode also ships with their own copies of ASan/TSan dylibs,
we cannot use them due to version mismatch.

There is a caveat: the sanitizer libraries are linked as @rpath, so the
user needs to additionally pass `-C rpath`:

    rustc -Z sanitizer=address -C rpath file.rs
                               ^~~~~~~~

Otherwise there will be a runtime error:

    dyld: Library not loaded: @rpath/libclang_rt.asan_osx_dynamic.dylib
      Referenced from: /path/to/executable
      Reason: image not found
    Abort trap: 6

The next commit includes a temporary change in compiler to force the linker
to emit a usable @rpath.
2017-04-25 10:31:01 +08:00
..
Cargo.toml Build libbacktrace/jemalloc only when their timestamps are older than sources 2017-02-02 22:40:42 +03:00
lib.rs Support AddressSanitizer and ThreadSanitizer on x86_64-apple-darwin. 2017-04-25 10:31:01 +08:00