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

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
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#ifndef SHARE_GC_Z_ZCONTINUATION_INLINE_HPP
#define SHARE_GC_Z_ZCONTINUATION_INLINE_HPP

#include "gc/z/zContinuation.hpp"

#include "classfile/javaClasses.hpp"
#include "gc/z/zAddress.inline.hpp"
#include "gc/z/zHeap.inline.hpp"
#include "gc/z/zStackChunkGCData.inline.hpp"
#include "oops/oop.inline.hpp"

inline bool ZContinuation::requires_barriers(const ZHeap* heap, stackChunkOop chunk) {
  if (!heap->is_allocating(to_zaddress(chunk))) {
    // An object that isn't allocating, is visible from GC tracing. Such
    // stack chunks require barriers.
    return true;
  }

  if (ZStackChunkGCData::color(chunk) != ZPointerStoreGoodMask) {
    // If a chunk is allocated after a GC started, but before relocate start
    // we can have an allocating chunk that isn't deeply good. That means that
    // the contained oops might be bad and require GC barriers.
    return true;
  }

  // The chunk is allocating and its pointers are good. This chunk needs no
  // GC barriers
  return false;
}

#endif // SHARE_GC_Z_ZCONTINUATION_INLINE_HPP