[all-commits] [llvm/llvm-project] 4cefa8: [TSan][libdispatch] Fix compilation error on Linux

[Julian Lettner via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 4cefa8614ffe18cf8de0fe86297df81f4385e08f
      https://github.com/llvm/llvm-project/commit/4cefa8614ffe18cf8de0fe86297df81f4385e08f
  Author: Julian Lettner <julian.lettner at apple.com>
  Date:   2020-09-02 (Wed, 02 Sep 2020)

  Changed paths:
    M compiler-rt/lib/tsan/rtl/tsan_interceptors_libdispatch.cpp

  Log Message:
  -----------
  [TSan][libdispatch] Fix compilation error on Linux

The interceptor for the block variants of the API references the
function versions (via `REAL(name##_f)`).  On Linux, this accesses the
underlying "real pointer", defined by the interceptor macro.  So we need
to declare interceptors in the right order to avoid undefined symbol
compiler error:
```
error: no member named 'real_dispatch_async_and_wait_f' in namespace '__tsan::__interception'
```

rdar://68181542