Region-Based Memory Management
for a Dynamically-Typed Language

Akihito Nagata, Naoki Kobayashi††, Akinori Yonezawa

Dept. of Computer Science, Graduate School of Information Science and Technology, University of Tokyo
†† Dept. of Computer Science, Graduate School of Information Science and Engineering, Tokyo Institute of Technology


Region-based memory management scheme has been proposed for programming language ML. In this scheme, a compiler statically estimates the live range of each object by performing an extension of type inference (called region inference) and inserts code for memory allocation and deallocation. Advantages of this scheme are that memory objects can be deallocated safely (unlike with manual memory management using malloc/free) and often earlier than with run-time garbage collection. Since the region inference is an extension of the ML type inference, however, it was not clear whether the region-based memory management was applicable to dynamically-typed programming languages like Scheme. In this paper, we show that the region-based memory management can be applied to dynamically-typed languages by combining region inference and Cartwright et al.'s soft type system.



Only the program translater is available, now.


Download and extract it, and execute

> make
(Objective Caml is required).
And region-scheme will be built. Try it as
> ./region-scheme example/fib.scm 

Compiler implementation will be available soon.

Mail : Akihito Nagata.
* Akihito Nagata's Page (in Japanese).
* Kobayashi Lab.
* Yonezawa Lab.