Can ART build with BROOKS barrier type?

[gqq nbig]

I notice in art/build/art.go, ART_READ_BARRIER_TYPE can be set to BROOKS. Once I made the change and build, compiler gives me error about noreturn of function mirror::Object::SetReadBarrierState, I have to change the declaration from 

#ifndef USE_BAKER_OR_BROOKS_READ_BARRIER

  NO_RETURN

#endif

  ALWAYS_INLINE void SetReadBarrierState(uint32_t rb_state) REQUIRES_SHARED(Locks::mutator_lock_);

to

#ifndef USE_BAKER_READ_BARRIER
  NO_RETURN
#endif
  ALWAYS_INLINE void SetReadBarrierState(uint32_t rb_state) REQUIRES_SHARED(Locks::mutator_lock_);

Then compiler gives me another error:

art/runtime/gc/collector/concurrent_copying.cc:2311:3: error: static_assert failed "Object header size does not match"
  static_assert(kObjectHeaderSize == sizeof(mirror::HeapReference<mirror::Class>) +
  ^             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 error generated.

Is BROOKS barrier type still supported?

[gqq nbig]

No. In current master branch, these #ifndef lines have been removed.

在 2019年5月24日星期五 UTC-7上午7:47:18，gqq nbig写道：