src/hotspot/share/gc/z/zOopClosures.inline.hpp

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 * version 2 for more details (a copy is included in the LICENSE file that
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#ifndef SHARE_GC_Z_ZOOPCLOSURES_INLINE_HPP
#define SHARE_GC_Z_ZOOPCLOSURES_INLINE_HPP

#include "gc/z/zBarrier.inline.hpp"
#include "gc/z/zHeap.inline.hpp"
#include "gc/z/zOop.inline.hpp"
#include "gc/z/zOopClosures.hpp"
#include "oops/oop.inline.hpp"
#include "runtime/atomic.hpp"
#include "utilities/debug.hpp"

inline void ZLoadBarrierOopClosure::do_oop(oop* p) {
  ZBarrier::load_barrier_on_oop_field(p);
}

inline void ZLoadBarrierOopClosure::do_oop(narrowOop* p) {
  ShouldNotReachHere();
}

inline void ZMarkRootOopClosure::do_oop(oop* p) {
  ZBarrier::mark_barrier_on_root_oop_field(p);
}

inline void ZMarkRootOopClosure::do_oop(narrowOop* p) {
  ShouldNotReachHere();
}

inline void ZRelocateRootOopClosure::do_oop(oop* p) {
  ZBarrier::relocate_barrier_on_root_oop_field(p);
}

inline void ZRelocateRootOopClosure::do_oop(narrowOop* p) {
  ShouldNotReachHere();
}

template <bool finalizable>
inline ZMarkBarrierOopClosure<finalizable>::ZMarkBarrierOopClosure() :
    BasicOopIterateClosure(finalizable ? NULL : ZHeap::heap()->reference_discoverer()) {}

template <bool finalizable>
inline void ZMarkBarrierOopClosure<finalizable>::do_oop(oop* p) {
  ZBarrier::mark_barrier_on_oop_field(p, finalizable);
}

template <bool finalizable>
inline void ZMarkBarrierOopClosure<finalizable>::do_oop(narrowOop* p) {
  ShouldNotReachHere();
}

inline bool ZPhantomIsAliveObjectClosure::do_object_b(oop o) {
  return ZBarrier::is_alive_barrier_on_phantom_oop(o);
}

inline void ZPhantomKeepAliveOopClosure::do_oop(oop* p) {
  ZBarrier::keep_alive_barrier_on_phantom_oop_field(p);
}

inline void ZPhantomKeepAliveOopClosure::do_oop(narrowOop* p) {
  ShouldNotReachHere();
}

inline void ZPhantomCleanOopClosure::do_oop(oop* p) {
  // Read the oop once, to make sure the liveness check
  // and the later clearing uses the same value.
  const oop obj = *(volatile oop*)p;
  if (ZBarrier::is_alive_barrier_on_phantom_oop(obj)) {
    ZBarrier::keep_alive_barrier_on_phantom_oop_field(p);
  } else {
    // The destination could have been modified/reused, in which case
    // we don't want to clear it. However, no one could write the same
    // oop here again (the object would be strongly live and we would
    // not consider clearing such oops), so therefore we don't have an
    // ABA problem here.
    Atomic::cmpxchg(oop(NULL), p, obj);
  }
}

inline void ZPhantomCleanOopClosure::do_oop(narrowOop* p) {
  ShouldNotReachHere();
}

#endif // SHARE_GC_Z_ZOOPCLOSURES_INLINE_HPP