Add OffHeap Query in J9VM

Signed-off-by: Abdulrahman Alattas <rmnattas@gmail.com>

Author: rmnattas

runtime/compiler/env/VMJ9.cpp

@@ -2439,6 +2439,27 @@ TR_J9VMBase::isHotReferenceFieldRequired()
    return TR::Compiler->om.isHotReferenceFieldRequired();
    }
 
+bool
+TR_J9VMBase::isIndexableDataAddrPresent()
+   {
+#if defined(J9VM_ENV_DATA64)
+   return FALSE != _jitConfig->javaVM->isIndexableDataAddrPresent;
+#else
+   return false;
+#endif /* defined(J9VM_ENV_DATA64) */
+   }
+
+/**
+ * Query if off-heap large array allocation is enabled
+ *
+ * @return true if off-heap large array allocation is enabled, false otherwise
+ */
+bool
+TR_J9VMBase::isOffHeapAllocationEnabled()
+   {
+   return TR::Compiler->om.isOffHeapAllocationEnabled();
+   }
+
 bool
 TR_J9VMBase::scanReferenceSlotsInClassForOffset(TR::Compilation * comp, TR_OpaqueClassBlock * classPointer, int32_t offset)
    {

runtime/compiler/env/VMJ9.h

@@ -1452,6 +1452,8 @@ class TR_J9VMBase : public TR_FrontEnd
    virtual void markHotField( TR::Compilation *, TR::SymbolReference *, TR_OpaqueClassBlock *, bool);
    virtual void reportHotField(int32_t reducedCpuUtil, J9Class* clazz, uint8_t fieldOffset,  uint32_t reducedFrequency);
    virtual bool isHotReferenceFieldRequired();
+   virtual bool isIndexableDataAddrPresent();
+   virtual bool isOffHeapAllocationEnabled();
    virtual void markClassForTenuredAlignment( TR::Compilation *comp, TR_OpaqueClassBlock *opclazz, uint32_t alignFromStart);
 
    virtual bool shouldDelayAotLoad() { return false; }