An Investigation into ROTOR and C-Sharp(C#) Zunaid Jogee Supervisors: Prof. P. Wentworth T. Stakemire

Outline What is ROTOR? Execution Model Execution state Virtual Object System Code examples What lies ahead

What is ROTOR? Microsofts shared source CLI C# implementation Over 1 million lines of source code FreeBSD, Windows XP and 2000 Ported to Linux

What is ROTOR? “Academia has delivered many breakthrough innovations through pure research. With the Shared Source CLI implementation, we hope to see great innovation around.NET technology.” Eric Rudder, senior vice president of the Developer Platform and Evangelism Division at Microsoft.

Execution Model Common Intermediate Language(CIL) Program Executable Model(PEM) JIT Verifiable Code Abstract Stack Machine

Execution State Activation Record Evaluation Stack Incoming Arguments Local variable Stack Elements Activation record Evaluation Stack

Stack Transitions Load Store Top

Virtual Object System Value Types - built-in scalars - enumerations - value classes Reference Types - pointers - interfaces - object types

Pointers Managed Pointers Transient Pointers Unmanaged Pointers Function Pointers

Code example using System; class MainApp { public static void Main() { Console.WriteLine("Hello World!"); } hello.il

Code Example using System; class Test2{ public static void Main(){ int itemCount = 10; itemCount++; Console.WriteLine(itemCount); itemCount += 2; Console.WriteLine(itemCount); Console.WriteLine(itemCount-4);}} test2.il

What Lies Ahead Mapping C# constructs to the CIL Speed comparisons Garbage Collector

Conclusion What is ROTOR? Execution Model Execution state Virtual Object System Code examples What lies ahead

Questions