Method and apparatus for resolving data references in generated code

In a computer system comprising a program in source code form, an apparatus for generating executable code for said program and resolving data references in said generated code, said apparatus comprising:

• a) compilation means for receiving said program in source code form and generating executable code in intermediate form for said program in source code form with data references being made in said generated code on a symbolic basis, said generated code comprising a plurality of instructions of said computer system;
• b) interpretation means for receiving said generated code and interpreting said instructions, one at a time;
• c) dynamic reference handling means coupled to said interpretation means for resolving said symbolic references to corresponding numeric references, replacing said symbolic references with their corresponding numeric references, and continuing interpretation by said interpretation means without advancing program execution, as said symbolic references are encountered while said instructions are being interpreted by said interpretation means;
• and
• d) static reference handling means coupled to said interpretation means for obtaining data in accordance to said numeric references, and continuing interpretation by said interpretation means after advancing program execution, as said numeric references are encountered while said instruction are being interpreted by said interpretation means;
• said interpretation means, said dynamic reference handling means, and said static reference handling means performing their corresponding functions iteratively and interleavingly.

A computer-readable medium containing instructions for controlling a data processing system to perform a method for interpreting intermediate form object code comprised of instructions, certain of said instructions containing one or more symbolic references, said method comprising the steps of:

• interpreting said instructions in accordance with a program execution control;
• and
• resolving a symbolic reference in an instruction being interpreted, said step of resolving said symbolic reference including the substeps of:
• determining a numerical reference corresponding to said symbolic reference, and
• storing said numerical reference in a memory.

In a computer system comprising a program, a method for executing said program comprising the steps of:

• receiving intermediate form object code for said program with symbolic data references in certain instructions of said intermediate form object code;
• and
• converting the instructions of the intermediate form object code having symbolic data references, said converting step comprising the substeps of:
• resolving said symbolic references to corresponding numerical references,
• storing said numerical references, and
• obtaining data in accordance to said numerical references.

A computer-implemented method comprising:

• receiving a program that comprises a set instructions written in an intermediate form code;
• replacing each instruction in the program with a symbolic data reference with a new instruction containing a numeric reference resulting from invocation of a dynamic field reference routine to resolve the symbolic data reference;
• and
• executing the program by performing an operation in accordance with each instruction or new instruction, depending upon whether an instruction has been replaced with a new instruction in accordance with the replacing step.

A computer-implemented method, comprising:

• receiving a program with a set instructions written in an intermediate form code;
• analyzing each instruction of the program to determine whether the instruction contains a symbolic reference to a data object;
• and
• executing the program, wherein when it was determined that an instruction contains a symbolic reference, data from a storage location identified by a numeric reference correspoding to the symbolic reference is used thereafter to perform an operation corresponding to that instruction.

A computer-implemented method for executing a program comprised of bytecodes, the method comprising:

• determining immediately prior to execution whether a bytecode of the program contains a symbolic data reference;
• when it is determined that the bytecode of the program contains a symbolic data reference, invoking a dynamic field reference routine to resolve the symbolic data reference;
• and
• executing thereafter the bytecode using stored data located using a numeric reference resulting from the resolution of the symbolic reference.

A computer program product containing instructions for causing a computer to perform a method for executing a program comprised of bytecodes, the method comprising:

• determining immediately prior to execution whether a bytecode of the program contains a symbolic data reference;
• when it is determined that the bytecode of the program contains a symbolic data reference, invoking a dynamic field reference routine to resolve the symbolic data reference;
• and
• executing thereafter the bytecode using stored data located using a numeric reference resulting from the resolution of the symbolic reference.

A computer-implemented method comprising:

• receiving a program with a set of original instructions written in an intermediate form code;
• generating a set of new instructions for the program that contain numeric references resulting from invocation of a routine to resolve any symbolic data references in the set of original instructions;
• and
• executing the program using the set of new instructions.

A computer program product containing instructions for causing a computer to perform a method, the method comprising:

• receiving a program with a set of original instructions written in an intermediate form code;
• generating a set of new instructions for the program that contain numeric references resulting from invocation of a routine to resolve any symbolic data references in the set of original instructions;
• and
• executing the program using the set of new instructions.

A computer-implemented method comprising:

• receiving a program that comprises a set instructions written in an intermediate form code;
• replacing each instruction in the program with a symbolic data reference with a new instruction containing a numeric reference resulting from invocation of a dynamic field reference routine to resolve the symbolic data reference;
• and
• executing the program by performing an operation in accordance with each instruction or new instruction, depending upon whether an instruction has been replaced with a new instruction in accordance with the replacing step.

A computer program product containing control instructions for causing a computer to perform a method, the method comprising:

• receiving a program that comprises a set instructions written in an intermediate form code;
• replacing each instruction in the program with a symbolic data reference with a new instruction containing a numeric reference resulting from invocation of a dynamic field reference routine to resolve the symbolic data reference;
• and
• executing the program by performing an operation in accordance with each instruction or new instruction, depending upon whether an instruction has been replaced with a new instruction in accordance with the replacing step.

A computer-implemented method, comprising:

• receiving a program with a set instructions written in an intermediate form code;
• analyzing each instruction of the program to determine whether the instruction contains a symbolic reference to a data object;
• and
• executing the program, wherein when it was determined that an instruction contains a symbolic reference, data from a storage location identified by a numeric reference corresponding to the symbolic reference is used thereafter to perform an operation corresponding to that instruction.

A computer program product containing control instructions for causing a computer to perform a method, the method comprising:

• receiving a program with a set instructions written in an intermediate form code;
• analyzing each instruction of the program to determine whether the instruction contains a symbolic reference to a data object;
• and
• executing the program, wherein when it was determined that an instruction contains a symbolic reference, data from a storage location identified by a numeric reference corresponding to the symbolic reference is used thereafter to perform an operation corresponding to that instruction.

A computer-implemented method for executing a program comprised of bytecodes, the method comprising:

• determining whether a bytecode of the program contains a symbolic reference;
• when it is determined that the bytecode contains a symbolic reference, invoking a dynamic field reference routine to resolve the symbolic reference;
• and
• performing an operation identified by the bytecode thereafter using data from a storage location identified by a numeric reference resulting from the invocation of the dynamic field reference routine.

A computer program product containing instructions for causing a computer to perform a method for executing a program comprised of bytecodes, the method comprising:

• determining whether a bytecode of the program contains a symbolic reference;
• when it is determined that the bytecode contains a symbolic reference, invoking a dynamic field reference routine to resolve the symbolic reference;
• and
• performing an operation identified by the bytecode therafter using data from a storage location identified by a numeric reference resulting from the invocation of the dynamic field reference routine.

A computer-implemented method comprising:

• receiving a program formed of instructions written in an intermediate form code compiled from source code;
• analyzing each instruction to determine whether it contains a symbolic field reference;
• and
• executing the program by performing an operation identified by each instruction, wherein data from a storage location identified by a numeric reference is thereafter used for the operation when the instruction contains a symbolic field reference, the numeric reference having been resolved from the symbolic field reference.

A computer program product containing control instructions for causing a computer to perform a method, the method comprising:

• receiving a program formed of instructions written in an intermediate form code compiled from source code;
• analyzing each instruction to determine whether it contains a symbolic field reference;
• and
• executing the program by performing an operation identified by each instruction, wherein data from a storage location identified by a numeric reference is used thereafter for the operation when the instruction contains a symbolic field reference, the numeric reference having been resolved from the symbolic field reference.