Automatic stub/adapter generator

Abstract

Systems and methods for automatically providing an adapter or a stub in a runtime environment are provided. An adapter generator is provided with input parameters that are in turn processed and input to a compiler. The compiler, in turn, is coupled to an adapter library used to store the generated adapters. The adapter library, in turn, provides adapters, on demand to a runtime system when executing a bytecode, or a series of bytecodes.

What is claimed is:  
     
         1 . In a computer system, a method for generating an adapter/stub, comprising: 
 identifying a machine state input parameter for a machine state;    identifying a call to compiled code input parameter for a call to compiled code;    mapping the machine state input parameter and the machine state to the call to compiled code input parameter; and    mapping the machine state and a return value to an exit point of an interpreter to compiled code adapter.    
     
     
         2 . A method as recited in  claim 1 , further comprising: 
 providing a stub representation to a compiler for compilation; and    generating object code based upon the compilation.    
     
     
         3 . A computer program product that implements an apparatus for generating an adapter/stub, comprising: 
 computer code that identifies a machine state input parameter for a machine state;    computer code that identifies a call to compiled code input parameter for a call to compiled code;    computer code that maps the machine state input parameter and the machine state to the call to compiled code input parameter; and    computer code that maps the machine state and a return value to an exit point of an interpreter to compiled code adapter; and    a computer readable medium that stores the computer codes.    
     
     
         4 . A computer program product as recited in  claim 3 , further comprising: 
 computer code that provides a stub representation to a compiler for compilation; and    computer code that generates object code based upon the compilation.    
     
     
         5 . The computer program product of  claim 4 , wherein the computer readable medium is selected from the group consisting of CD-ROM, floppy disk, tape, flash memory, system memory, hard drive, and data signal embodied in a carrier wave.  
     
     
         6 . In a computer system, an apparatus for processing a bytecode in a runtime environment, comprising: 
 means for receiving the bytecode;    means for determining if the bytecode is to be interpreted or executed;    if the bytecode is to be executed, 
 means for determining if an adapter is required in order to process the bytecode;  
 means for determining if the adapter is located in an adapter library if the adapter is required;  
 means for generating the adapter if it is determined that the required adapter is not in the library;  
 means for storing the generated adapter in the library;  
 means for providing the adapter to the runtime environment;  
 means for executing the bytecode;  
   if the bytecode is to be interpreted, 
 means for determining if the adapter is required; and  
 means for interpreting the bytecode when the adapter is not required; and  
 means for generating the adapter when the adapter is required.  
   
     
     
         7 . A computer program product that processes a bytecode in a runtime environment, comprising: 
 computer code for receiving the bytecode;    computer code for determining if the bytecode is to be interpreted or executed;    if the bytecode is to be executed, 
 computer code for determining if an adapter is required in order to process the bytecode;  
 computer code for determining if the adapter is located in an adapter library if the adapter is required;  
 computer code for generating the adapter if it is determined that the required adapter is not in the library;  
 computer code for storing the generated adapter in the library;  
 computer code for providing the adapter to the runtime environment;  
 computer code for executing the bytecode;  
   if the bytecode is to be interpreted, 
 computer code for determining if the adapter is required; and  
 computer code for interpreting the bytecode when the adapter is not required;  
 computer code for generating the adapter when the adapter is required; and  
   a computer readable medium that stores the computer codes.    
     
     
         8 . The computer program product of  claim 7 , wherein the computer readable medium is selected from the group consisting of CD-ROM, floppy disk, tape, flash memory, system memory, hard drive, and data signal embodied in a carrier wave.