--- a/src/hotspot/share/gc/g1/g1SATBCardTableModRefBS.inline.hpp	Mon Nov 20 12:04:13 2017 +0100
+++ b/src/hotspot/share/gc/g1/g1SATBCardTableModRefBS.inline.hpp	Mon Nov 20 13:07:44 2017 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,24 +25,30 @@
 #ifndef SHARE_VM_GC_G1_G1SATBCARDTABLEMODREFBS_INLINE_HPP
 #define SHARE_VM_GC_G1_G1SATBCARDTABLEMODREFBS_INLINE_HPP
 
+#include "gc/shared/accessBarrierSupport.inline.hpp"
 #include "gc/g1/g1SATBCardTableModRefBS.hpp"
 #include "oops/oop.inline.hpp"
 
-// We export this to make it available in cases where the static
-// type of the barrier set is known.  Note that it is non-virtual.
-template <class T> void G1SATBCardTableModRefBS::inline_write_ref_field_pre(T* field, oop newVal) {
+template <DecoratorSet decorators, typename T>
+inline void G1SATBCardTableModRefBS::write_ref_field_pre(T* field) {
+  if (HasDecorator<decorators, ARRAYCOPY_DEST_NOT_INITIALIZED>::value ||
+      HasDecorator<decorators, AS_NO_KEEPALIVE>::value) {
+    return;
+  }
+
   T heap_oop = oopDesc::load_heap_oop(field);
   if (!oopDesc::is_null(heap_oop)) {
-    enqueue(oopDesc::decode_heap_oop(heap_oop));
+    enqueue(oopDesc::decode_heap_oop_not_null(heap_oop));
   }
 }
 
-// These are the more general virtual versions.
-void G1SATBCardTableModRefBS::write_ref_field_pre_work(oop* field, oop new_val) {
-  inline_write_ref_field_pre(field, new_val);
-}
-void G1SATBCardTableModRefBS::write_ref_field_pre_work(narrowOop* field, oop new_val) {
-  inline_write_ref_field_pre(field, new_val);
+template <DecoratorSet decorators, typename T>
+inline void G1SATBCardTableLoggingModRefBS::write_ref_field_post(T* field, oop new_val) {
+  volatile jbyte* byte = byte_for(field);
+  if (*byte != g1_young_gen) {
+    // Take a slow path for cards in old
+    write_ref_field_post_slow(byte);
+  }
 }
 
 void G1SATBCardTableModRefBS::set_card_claimed(size_t card_index) {
@@ -55,4 +61,53 @@
   _byte_map[card_index] = val;
 }
 
+inline void G1SATBCardTableModRefBS::enqueue_if_weak(DecoratorSet decorators, oop value) {
+  assert((decorators & ON_UNKNOWN_OOP_REF) == 0, "Reference strength must be known");
+  const bool on_strong_oop_ref = (decorators & ON_STRONG_OOP_REF) != 0;
+  const bool peek              = (decorators & AS_NO_KEEPALIVE) != 0;
+
+  if (!peek && !on_strong_oop_ref && value != NULL) {
+    enqueue(value);
+  }
+}
+
+template <DecoratorSet decorators, typename BarrierSetT>
+template <typename T>
+inline oop G1SATBCardTableLoggingModRefBS::AccessBarrier<decorators, BarrierSetT>::
+oop_load_not_in_heap(T* addr) {
+  oop value = ModRef::oop_load_not_in_heap(addr);
+  enqueue_if_weak(decorators, value);
+  return value;
+}
+
+template <DecoratorSet decorators, typename BarrierSetT>
+template <typename T>
+inline oop G1SATBCardTableLoggingModRefBS::AccessBarrier<decorators, BarrierSetT>::
+oop_load_in_heap(T* addr) {
+  oop value = ModRef::oop_load_in_heap(addr);
+  enqueue_if_weak(decorators, value);
+  return value;
+}
+
+template <DecoratorSet decorators, typename BarrierSetT>
+inline oop G1SATBCardTableLoggingModRefBS::AccessBarrier<decorators, BarrierSetT>::
+oop_load_in_heap_at(oop base, ptrdiff_t offset) {
+  oop value = ModRef::oop_load_in_heap_at(base, offset);
+  enqueue_if_weak(AccessBarrierSupport::resolve_possibly_unknown_oop_ref_strength<decorators>(base, offset), value);
+  return value;
+}
+
+template <DecoratorSet decorators, typename BarrierSetT>
+template <typename T>
+inline void G1SATBCardTableLoggingModRefBS::AccessBarrier<decorators, BarrierSetT>::
+oop_store_not_in_heap(T* addr, oop new_value) {
+  if (HasDecorator<decorators, IN_CONCURRENT_ROOT>::value) {
+    // For roots not scanned in a safepoint, we have to apply SATB barriers
+    // even for roots.
+    G1SATBCardTableLoggingModRefBS *bs = barrier_set_cast<G1SATBCardTableLoggingModRefBS>(BarrierSet::barrier_set());
+    bs->write_ref_field_pre<decorators>(addr);
+  }
+  Raw::oop_store(addr, new_value);
+}
+
 #endif // SHARE_VM_GC_G1_G1SATBCARDTABLEMODREFBS_INLINE_HPP