20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_OOPS_INSTANCEOOP_HPP
  26 #define SHARE_VM_OOPS_INSTANCEOOP_HPP
  27 
  28 #include "oops/oop.hpp"
  29 
  30 // An instanceOop is an instance of a Java Class
  31 // Evaluating "new HashTable()" will create an instanceOop.
  32 
  33 class instanceOopDesc : public oopDesc {
  34  public:
  35   // aligned header size.
  36   static int header_size() { return sizeof(instanceOopDesc)/HeapWordSize; }
  37 
  38   // If compressed, the offset of the fields of the instance may not be aligned.
  39   static int base_offset_in_bytes() {
  40     // offset computation code breaks if UseCompressedKlassPointers
  41     // only is true
  42     return (UseCompressedOops && UseCompressedKlassPointers) ?
  43              klass_gap_offset_in_bytes() :
  44              sizeof(instanceOopDesc);
  45   }
  46 
  47   static bool contains_field_offset(int offset, int nonstatic_field_size) {
  48     int base_in_bytes = base_offset_in_bytes();
  49     return (offset >= base_in_bytes &&
  50             (offset-base_in_bytes) < nonstatic_field_size * heapOopSize);
  51   }
  52 };
  53 
  54 #endif // SHARE_VM_OOPS_INSTANCEOOP_HPP

  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_VM_OOPS_INSTANCEOOP_HPP
  26 #define SHARE_VM_OOPS_INSTANCEOOP_HPP
  27 
  28 #include "oops/oop.hpp"
  29 
  30 // An instanceOop is an instance of a Java Class
  31 // Evaluating "new HashTable()" will create an instanceOop.
  32 
  33 class instanceOopDesc : public oopDesc {
  34  public:
  35   // aligned header size.
  36   static int header_size() { return sizeof(instanceOopDesc)/HeapWordSize; }
  37 
  38   // If compressed, the offset of the fields of the instance may not be aligned.
  39   static int base_offset_in_bytes() {
  40     // offset computation code breaks if UseCompressedClassPointers
  41     // only is true
  42     return (UseCompressedOops && UseCompressedClassPointers) ?
  43              klass_gap_offset_in_bytes() :
  44              sizeof(instanceOopDesc);
  45   }
  46 
  47   static bool contains_field_offset(int offset, int nonstatic_field_size) {
  48     int base_in_bytes = base_offset_in_bytes();
  49     return (offset >= base_in_bytes &&
  50             (offset-base_in_bytes) < nonstatic_field_size * heapOopSize);
  51   }
  52 };
  53 
  54 #endif // SHARE_VM_OOPS_INSTANCEOOP_HPP