POSIX-Compliant Portable Code Synthesis for Embedded Systems

In a large class of embedded systems, dynamic multithreading using traditional OS techniques is infeasible due to memory and processing overheads or lack of operating systems (OS) availability for the target embedded processor. In this work, we propose a source-to-source translator that takes a POSIX compliant multithreaded C program as input and generates an equivalent, embedded processor independent, single threaded ANSI C program, to be compiled using the embedded processor-specific tool chain. The output of our tool is a highly tuned ANSI C program that embodies the applicationspecific embedded scheduler and dynamic multithreading infrastructure along with the user code. In this work, we outline the implementation details of our source-to-source translator and show the feasibility of the proposed technique by comparing execution efficiency to approaches based on Java-VM and traditional UNIX based POSIX implementations.