runtime/race: complete race detector on netbsd/amd64

[bradfitz]

The new netbsd/amd64 race detector support is not 100% done yet, per #19273 (comment)

We also don't have a builder for it.

This is a tracking bug to see it completed.

/cc @krytarowski

[krytarowski]

I will work on it after squashing the remaining failures in C/C++ style check-tsan:

$ check-tsan

********************
Testing Time: 1336.74s
********************
Failing Tests (8):
    ThreadSanitizer-x86_64 :: dtls.c
    ThreadSanitizer-x86_64 :: getline_nohang.cc
    ThreadSanitizer-x86_64 :: ignore_lib5.cc
    ThreadSanitizer-x86_64 :: ignored-interceptors-mmap.cc
    ThreadSanitizer-x86_64 :: mutex_lock_destroyed.cc
    ThreadSanitizer-x86_64 :: signal_block.cc
    ThreadSanitizer-x86_64 :: strerror_r.cc
    ThreadSanitizer-x86_64 :: vfork.cc

  Expected Passes    : 288
  Expected Failures  : 1
  Unsupported Tests  : 85
  Unexpected Failures: 8

Other than that, golang/race seems to use the StopTheWorld() operation that is unimplemented in the upstream version for now. (We have got an implementation in downstream GCC copy).

[gopherbot]

Change https://golang.org/cl/131555 mentions this issue: cmd/dist: do not run race detector tests on netbsd