Abstract

This paper presents enhanced memory management concepts and their implementation providing better support for multi threading. The virtual address space of the multi threaded process is dynamically partitioned by a dynamic set of cooperating managers. Special thoughts are given to detect and solve possible thread stack and heap overflows and collisions. Both stacks and heaps associated with threads are organized non-contiguously with linear segments to fully exploit possibly large virtual address spaces. Crucial for the efficiency of this approach are modifications of the compiler and parts of the runtime system. The proposed solutions are implemented an evaluated on the SUN Sparc V9 architecture. Keywords: operating systems, multi threading, memory management 1 New Features and Flaws Multi-tasking operating systems (OS) usually provide private address spaces for processes. In order to share data amongst processes, IPC interfaces such as shared mappings, signals, or sockets along wit...

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