agent/src/share/classes/sun/jvm/hotspot/oops/Symbol.java

*** 78,91 ****
    public long   getLength() { return          length.getValue(this.addr); }
  
    public byte getByteAt(long index) {
      return addr.getJByteAt(baseOffset + index);
    }
! 
    private static CIntegerField idHash;
  
!   public int identityHash() { return     (int)idHash.getValue(this.addr); }
  
    public boolean equals(byte[] modUTF8Chars) {
      int l = (int) getLength();
      if (l != modUTF8Chars.length) return false;
      while (l-- > 0) {
--- 78,100 ----
    public long   getLength() { return          length.getValue(this.addr); }
  
    public byte getByteAt(long index) {
      return addr.getJByteAt(baseOffset + index);
    }
!   // _identity_hash is a short
    private static CIntegerField idHash;
  
!   public int identityHash() {
!     long addr_value = getAddress().asLongValue();
!     int  addr_bits = (int)(addr_value >> (VM.getVM().getLogMinObjAlignmentInBytes() + 3));
!     int  length = (int)getLength();
!     int  byte0 = getByteAt(0);
!     int  byte1 = getByteAt(1);
!     int  id_hash = (int)(0xffff & idHash.getValue(this.addr));
!     return id_hash |
!            ((addr_bits ^ (length << 8) ^ ((byte0 << 8) | byte1)) << 16); 
!   }
  
    public boolean equals(byte[] modUTF8Chars) {
      int l = (int) getLength();
      if (l != modUTF8Chars.length) return false;
      while (l-- > 0) {