WO2001063412A3 - Small memory footprint system and method for separating applications within a single virtual machine - Google Patents

Small memory footprint system and method for separating applications within a single virtual machine Download PDF

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Publication number
WO2001063412A3
WO2001063412A3 PCT/US2001/005886 US0105886W WO0163412A3 WO 2001063412 A3 WO2001063412 A3 WO 2001063412A3 US 0105886 W US0105886 W US 0105886W WO 0163412 A3 WO0163412 A3 WO 0163412A3
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WO
WIPO (PCT)
Prior art keywords
fields
static
applications
class
original
Prior art date
Application number
PCT/US2001/005886
Other languages
French (fr)
Other versions
WO2001063412A2 (en
WO2001063412A9 (en
Inventor
Grzegorz J Czajkowski
Original Assignee
Sun Microsystems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sun Microsystems Inc filed Critical Sun Microsystems Inc
Priority to AU2001239851A priority Critical patent/AU2001239851A1/en
Priority to GB0220075A priority patent/GB2375641B/en
Publication of WO2001063412A2 publication Critical patent/WO2001063412A2/en
Publication of WO2001063412A9 publication Critical patent/WO2001063412A9/en
Publication of WO2001063412A3 publication Critical patent/WO2001063412A3/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/44—Arrangements for executing specific programs
    • G06F9/445—Program loading or initiating
    • G06F9/44557—Code layout in executable memory
    • G06F9/44563—Sharing

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  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Stored Programmes (AREA)
  • Memory System Of A Hierarchy Structure (AREA)

Abstract

A system and method for isolating the execution of a plurality of applications. The applications may utilize or share one or more 'original' classes. Only one copy of each original class is maintained, regardless of how many applications utilize it. Static fields are extracted from the original classes. A separate copy of the static fields is created for each of the utilizing applications. A static field class which includes instance fields corresponding to the static fields may be created, wherein each instance of the static field class corresponds to one of the utilizing applications. Access methods for the one or more static fields may be created, wherein the access methods are operable to access the corresponding separate copy of the static fields based upon the identity of the utilizing application. A single access methods class may be created for each original class, wherein the single access methods class includes the access methods for accessing the extracted fields from the original class. The method and system may be optimized by exempting from extraction static fields that are classified as secure for utilization by the plurality of applications without inter-application interference. The secure set of static fields may include final static fields of primitive types, final static strings, immutable arrays of primitive types, and/or other appropriate fields.
PCT/US2001/005886 2000-02-25 2001-02-23 Small memory footprint system and method for separating applications within a single virtual machine WO2001063412A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2001239851A AU2001239851A1 (en) 2000-02-25 2001-02-23 Small memory footprint system and method for separating applications within a single virtual machine
GB0220075A GB2375641B (en) 2000-02-25 2001-02-23 Small memory footprint system and method for separating applications within a single virtual machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/513,291 2000-02-25
US09/513,291 US6567974B1 (en) 2000-02-25 2000-02-25 Small memory footprint system and method for separating applications within a single virtual machine

Publications (3)

Publication Number Publication Date
WO2001063412A2 WO2001063412A2 (en) 2001-08-30
WO2001063412A9 WO2001063412A9 (en) 2002-10-24
WO2001063412A3 true WO2001063412A3 (en) 2003-07-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/005886 WO2001063412A2 (en) 2000-02-25 2001-02-23 Small memory footprint system and method for separating applications within a single virtual machine

Country Status (4)

Country Link
US (2) US6567974B1 (en)
AU (1) AU2001239851A1 (en)
GB (1) GB2375641B (en)
WO (1) WO2001063412A2 (en)

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Also Published As

Publication number Publication date
GB2375641A (en) 2002-11-20
AU2001239851A1 (en) 2001-09-03
US6567974B1 (en) 2003-05-20
US20030191867A1 (en) 2003-10-09
US6938247B2 (en) 2005-08-30
GB0220075D0 (en) 2002-10-09
GB2375641B (en) 2004-11-24
WO2001063412A2 (en) 2001-08-30
WO2001063412A9 (en) 2002-10-24

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