java.lang.Object
   sun.jvm.hotspot.runtime.VMObject
      sun.jvm.hotspot.runtime.JavaCallWrapper

Direct Known Subclasses:
    AMD64JavaCallWrapper, X86JavaCallWrapper, IA64JavaCallWrapper

A JavaCallWrapper is constructed before each JavaCall and destroyed after the call. Its purpose is to allocate/deallocate a new handle block and to save/restore the last Java fp/sp. A pointer to the JavaCallWrapper is stored on the stack.

NOTE: this port is very minimal and is only designed to get frame traversal working. FIXME: we will have to add platform- specific stuff later and therefore a factory for these objects.

 public JavaCallWrapper(Address addr) 
{
    super(addr);
}

 public Address getLastJavaPC() 
{
    return lastJavaPCField.getValue(addr.addOffsetTo(anchorField.getOffset()));
}

 public Address getLastJavaSP() 
{
    return lastJavaSPField.getValue(addr.addOffsetTo(anchorField.getOffset()));
}