CA2309768A1 - Dataflow algorithm for symbolic computation of lowest upper bound type - Google Patents

Dataflow algorithm for symbolic computation of lowest upper bound type Download PDF

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Publication number
CA2309768A1
CA2309768A1 CA002309768A CA2309768A CA2309768A1 CA 2309768 A1 CA2309768 A1 CA 2309768A1 CA 002309768 A CA002309768 A CA 002309768A CA 2309768 A CA2309768 A CA 2309768A CA 2309768 A1 CA2309768 A1 CA 2309768A1
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CA
Canada
Prior art keywords
module
upper bound
referenced
lowest upper
bound type
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA002309768A
Other languages
French (fr)
Other versions
CA2309768C (en
Inventor
Sheng Liang
Gilad Bracha
Timothy G. Lindholm
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sun Microsystems Inc
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
Publication of CA2309768A1 publication Critical patent/CA2309768A1/en
Application granted granted Critical
Publication of CA2309768C publication Critical patent/CA2309768C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • G06F9/44521—Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
    • 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
    • G06F9/44589—Program code verification, e.g. Java bytecode verification, proof-carrying code
    • 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
    • G06F9/455—Emulation; Interpretation; Software simulation, e.g. virtualisation or emulation of application or operating system execution engines
    • G06F9/45504—Abstract machines for programme code execution, e.g. Java virtual machine [JVM], interpreters, emulators

Abstract

A method, computer program, signal transmission, apparatus and system verify instructions in a module of a computer program to be dynamically linked with at least one other module. First it is determined whether checking an instruction in a first module which is loaded requires a lowest upper bound (LUB) class of at least two referenced classes in one or more referenced modules different than the first module. If such information is required, a constraint for the referenced module is written without loading the referenced module. The constraint is of the form "the set of at least two classes inherits from a specified class."
CA002309768A 1999-05-27 2000-05-26 Dataflow algorithm for symbolic computation of lowest upper bound type Expired - Fee Related CA2309768C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/321,228 1999-05-27
US09/321,228 US6766521B1 (en) 1999-05-27 1999-05-27 Dataflow algorithm for symbolic computation of lowest upper bound type

Publications (2)

Publication Number Publication Date
CA2309768A1 true CA2309768A1 (en) 2000-11-27
CA2309768C CA2309768C (en) 2005-12-13

Family

ID=23249729

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002309768A Expired - Fee Related CA2309768C (en) 1999-05-27 2000-05-26 Dataflow algorithm for symbolic computation of lowest upper bound type

Country Status (6)

Country Link
US (1) US6766521B1 (en)
EP (1) EP1056005B1 (en)
JP (1) JP2001175487A (en)
CN (1) CN1224902C (en)
AU (1) AU770452B2 (en)
CA (1) CA2309768C (en)

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US20020199156A1 (en) * 2001-05-23 2002-12-26 Fuel Tech, Inc. Hardware-adaptable data visualization tool for use in complex data analysis and engineering design
US7036111B2 (en) * 2001-06-01 2006-04-25 Hewlett-Packard Development Company, L.P. Code verification system and method
US8356290B2 (en) * 2009-04-27 2013-01-15 National Instruments Corporation Conversion of a class oriented data flow program with inheritance to a structure oriented data flow program
US8769518B1 (en) * 2010-06-29 2014-07-01 Ca, Inc. Ensuring determinism during programmatic replay in a virtual machine
US10055208B2 (en) * 2015-08-09 2018-08-21 Oracle International Corporation Extending a virtual machine instruction set architecture
CN107203407B (en) * 2016-03-18 2020-06-23 龙芯中科技术有限公司 Data verification method and device in Java virtual machine

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CA2102883A1 (en) * 1993-02-26 1994-08-27 James W. Arendt System and method for lazy loading of shared libraries
US5748964A (en) 1994-12-20 1998-05-05 Sun Microsystems, Inc. Bytecode program interpreter apparatus and method with pre-verification of data type restrictions
US5668999A (en) 1994-12-20 1997-09-16 Sun Microsystems, Inc. System and method for pre-verification of stack usage in bytecode program loops
US5504568A (en) 1995-04-21 1996-04-02 Xerox Corporation Print sequence scheduling system for duplex printing apparatus
US5781710A (en) 1995-06-07 1998-07-14 Xerox Corporation Generic method for scheduling print engines using print engine capabilities
US5696893A (en) 1995-06-07 1997-12-09 Xerox Corporation System for generically describing and scheduling operation of modular printing machine
US5668942A (en) 1995-06-07 1997-09-16 Xerox Corporation Generic system for describing and using resources for print engine scheduling
US5771339A (en) 1995-06-07 1998-06-23 Xerox Corporation Method for automatically deriving print engine capabilities for incremental scheduling from compositional print engine models
US5694529A (en) 1995-06-07 1997-12-02 Xerox Corporation System for automatically configuring print engine software from print engine module capabilities
US5835688A (en) 1995-06-07 1998-11-10 Xerox Corporation Generic method for automatically generating finite-state machines for schedudling from print engine capabilities
US5631740A (en) 1995-11-28 1997-05-20 Xerox Corporation Transducers with constraints model for print scheduling
US5617214A (en) 1995-11-28 1997-04-01 Xerox Corporation Commitment groups to generalize the scheduling of interdependent document output terminal capabilities
US5701557A (en) 1995-11-28 1997-12-23 Xerox Corporation Machine graphs and capabilities to represent document output terminals composed of arbitrary configurations
US6067575A (en) 1995-12-08 2000-05-23 Sun Microsystems, Inc. System and method for generating trusted, architecture specific, compiled versions of architecture neutral programs
US5815718A (en) 1996-05-30 1998-09-29 Sun Microsystems, Inc. Method and system for loading classes in read-only memory
US5729790A (en) 1997-01-21 1998-03-17 Xerox Corporation Operation scheduling system for a digital printing apparatus using a tree of possible schedules
US5812273A (en) 1997-01-21 1998-09-22 Xerox Corporation Operation scheduling system for a digital printing apparatus, using a table of executed operations to revise a schedule in real time
US5935249A (en) 1997-02-26 1999-08-10 Sun Microsystems, Inc. Mechanism for embedding network based control systems in a local network interface device
US6092147A (en) * 1997-04-15 2000-07-18 Sun Microsystems, Inc. Virtual machine with securely distributed bytecode verification
US5983348A (en) 1997-09-10 1999-11-09 Trend Micro Incorporated Computer network malicious code scanner
US6061721A (en) 1997-10-06 2000-05-09 Sun Microsystems, Inc. Bean-based management system
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US6219787B1 (en) 1997-12-22 2001-04-17 Texas Instruments Incorporated Method and apparatus for extending security model to native code
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US6237135B1 (en) 1998-06-18 2001-05-22 Borland Software Corporation Development system with visual design tools for creating and maintaining Java Beans components
US6430569B1 (en) * 1998-08-14 2002-08-06 Sun Microsystems, Inc. Methods and apparatus for type safe, lazy, user-defined class loading
US6321333B1 (en) 1998-10-14 2001-11-20 Wave Systems Corporation Efficient digital certificate processing in a data processing system
US6618855B1 (en) * 1999-05-27 2003-09-09 Sun Microsystems, Inc. Caching untrusted modules for module-by-module verification
US6618769B1 (en) * 1999-05-27 2003-09-09 Sun Microsystems, Inc. Module-by-module verification
US6601114B1 (en) * 1999-05-27 2003-07-29 Sun Microsystems, Inc. Fully lazy linking with module-by-module verification

Also Published As

Publication number Publication date
CA2309768C (en) 2005-12-13
AU770452B2 (en) 2004-02-19
AU3643700A (en) 2000-11-30
CN1224902C (en) 2005-10-26
JP2001175487A (en) 2001-06-29
EP1056005A2 (en) 2000-11-29
EP1056005A3 (en) 2001-12-12
CN1292526A (en) 2001-04-25
US6766521B1 (en) 2004-07-20
EP1056005B1 (en) 2013-05-01

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