A low Overhead Per Object Write Barrier for the Cog VM

Bera, Clément

Document type :

Communication dans un congrès avec actes

DOI :

10.1145/2991041.2991063

Title :

A low Overhead Per Object Write Barrier for the Cog VM

Author(s) :

Bera, Clément [Auteur]
Analyses and Languages Constructs for Object-Oriented Application Evolution [RMOD]

Conference title :

IWST 16

City :

Pragues

Country :

République tchèque

Start date of the conference :

2016

Journal title :

Proceedings of the 11th edition of the International Workshop on Smalltalk Technologies

English keyword(s) :

Store Check
Language Virtual Machine
Just-in-Time Com-pilation
Interpreter
Write Barrier

HAL domain(s) :

Informatique [cs]/Langage de programmation [cs.PL]

English abstract : [en]

In several Smalltalk implementations, a program can mark any object as read-only (unfortunately incorrectly sometimes miscalled immutable). Such read-only objects cannot be mutated unless the program explicitly revert them ...
Show more >In several Smalltalk implementations, a program can mark any object as read-only (unfortunately incorrectly sometimes miscalled immutable). Such read-only objects cannot be mutated unless the program explicitly revert them to a writable state. This feature, called write barrier, may induce noticeable overhead if not implemented carefully, both in memory footprint and execution time. In this paper I discuss the recent addition of the write barrier in the Cog virtual machine and the support introduced in the Pharo 6 image. I detail specific aspects of the implementation that allows, according to multiple evaluations presented in the paper, to have such a feature with little to no overhead.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

Centre de Recherche en Informatique, Signal et Automatique de Lille (CRIStAL) - UMR 9189

Source :

Harvested from HAL

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