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AssigneeInternational Business Machines Corporation
InventorsGraham Chapman, John Duimovich, Trent Gray-Donald, Graeme Johnson, Andrew Low, Peter Wiebe Burka, Patrick James Mueller, Ryan Andrew Sciampancone, Peter Duncan Shipton
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In typical Java and other interpreted programming language environments, the code is stored in ROM in a semi-processed state, .class files containing byte codes. When the device is turned on, a virtual machine resolves references and links the .class file in RAM to permit desired applications to be run. In the invention, the .class files are further pre-processed to select the data which will not change or require updating. This data is packaged into memory image files containing internal data pre-linking this data. The memory image files are stored in ROM and are accessible from ROM by the virtual machine at runtime. Only elements that will be updated, such as the objects themselves, must be instantiated in RAM at runtime. This reduces the amount of RAM needed to run the application. In an environment with memory constraints, the reduction in RAM requirements permits more RAM to be made available for application use.
In an interpreted programming environment, a system in which files are pre-processed to a semi-processed state for linking and execution by a virtual machine at runtime on a target device, wherein the improvement comprises:
A computer-readable program stored on computer readable medium comprising a data file adapted to be accessed by a virtual machine from read-only memory (ROM) at runtime, the data file comprising:
A method for constructing a memory image file for storage in read-only memory (ROM) of a target device, comprising:
A computer program product comprising a computer usable medium having computer readable program code means embodied therein for causing a computer to construct a memory image file for storage in read-only memory (ROM) of a target device, the computer readable program code means in said computer program product comprising:
Dependencies are inferred from the claim text.