Global constant pool to allow deletion of constant pool entries
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United States of America Patent
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Jul 3, 2007
Grant Date -
Sep 11, 2003
app pub date -
Feb 7, 2001
filing date -
Feb 7, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
A method and apparatus for reducing runtime memory requirements of a virtual machine. The invention involves analyzing object code compiled from source code. The object code includes at least two load-units that each contain a load-unit specific constant pool. Each load-unit is analyzed to determine which constants are actual constants and then those actual constants are analyzed to determine where commonality exists among the load-units. If a constant is determined to be redundant it is rewritten to a global constant pool. The references to the constant in the load-unit specific constant pool are rewritten to point to the value in the global constant pool. The memory allocated to the constant in the individual load-unit is then reallocated, either by a programmed routine or by memory management tools.
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