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Implementing jalapeño in Java

Authors:

C. R. Attanasio,

Anthony Cocchi,

John J. Barton,

Susan Flynn Hummel,

Janice C. Sheperd,

Mark MergenAuthors Info & Claims

OOPSLA '99: Proceedings of the 14th ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications

Pages 314 - 324

https://doi.org/10.1145/320384.320418

Published: 01 October 1999 Publication History

Abstract

Jalapeño is a virtual machine for Java™ servers written in Java.

A running Java program involves four layers of functionality: the user code, the virtual-machine, the operating system, and the hardware. By drawing the Java / non-Java boundary below the virtual machine rather than above it, Jalapeño reduces the boundary-crossing overhead and opens up more opportunities for optimization.

To get Jalapeño started, a boot image of a working Jalapeño virtual machine is concocted and written to a file. Later, this file can be loaded into memory and executed. Because the boot image consists entirely of Java objects, it can be concocted by a Java program that runs in any JVM. This program uses reflection to convert the boot image into Jalapeño's object format.

A special MAGIC class allows unsafe casts and direct access to the hardware. Methods of this class are recognized by Jalapeño's three compilers, which ignore their bytecodes and emit special-purpose machine code. User code will not be allowed to call MAGIC methods so Java's integrity is preserved.

A small non-Java program is used to start up a boot image and as an interface to the operating system.

Java's programming features — object orientation, type safety, automatic memory management — greatly facilitated development of Jalapeño. However, we also discovered some of the language's limitations.

References

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cover image ACM Conferences

OOPSLA '99: Proceedings of the 14th ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications

October 1999

462 pages

ISBN:1581132387

DOI:10.1145/320384

Chairmen:
Brent Hailpern
IBM T. J. Watson Research Center
,
Linda M. Northrop
Carnegie Mellon Univ., Pittsburgh, PA
,
Editor:
A. Michael Berman

ACM SIGPLAN Notices Volume 34, Issue 10
Oct. 1999
460 pages
ISSN:0362-1340
EISSN:1558-1160
DOI:10.1145/320385
Chairman:
Brent Hailpern,
Editors:
A. Michael Berman,
Linda M. Northrop
Issue’s Table of Contents

Copyright © 1999 ACM.

Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Published: 01 October 1999

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OOPSLA99: Conference on Object Oriented Programming Systems Languages and Applications

November 1 - 5, 1999

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https://dl.acm.org/doi/10.1145/3568952
Akdur D(2022)Analysis of Software Engineering Skills Gap in the IndustryACM Transactions on Computing Education10.1145/356783723:1(1-28)Online publication date: 29-Dec-2022
https://dl.acm.org/doi/10.1145/3567837
Tursun CDidyk P(2022)Perceptual Visibility Model for Temporal Contrast Changes in PeripheryACM Transactions on Graphics10.1145/356424142:2(1-16)Online publication date: 22-Nov-2022
https://dl.acm.org/doi/10.1145/3564241
Sareen KBlackburn S(2022)Better Understanding the Costs and Benefits of Automatic Memory ManagementProceedings of the 19th International Conference on Managed Programming Languages and Runtimes10.1145/3546918.3546926(29-44)Online publication date: 14-Sep-2022
https://dl.acm.org/doi/10.1145/3546918.3546926
Ingalls DMiranda EBéra CGonzalez Boix E(2020)Two decades of live coding and debugging of virtual machines through simulationSoftware: Practice and Experience10.1002/spe.284150:9(1629-1650)Online publication date: 8-May-2020
https://doi.org/10.1002/spe.2841
Wimmer CStancu CHofer PJovanovic VWögerer PKessler PPliss OWürthinger T(2019)Initialize once, start fast: application initialization at build timeProceedings of the ACM on Programming Languages10.1145/33606103:OOPSLA(1-29)Online publication date: 10-Oct-2019
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