Dynamic software updates
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United States of America Patent
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Feb 9, 2016
Grant Date -
Oct 24, 2013
app pub date -
Apr 23, 2012
filing date -
Apr 23, 2012
priority date (Note) -
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Abstract
A method, and a corresponding system, for dynamically updating software while the software is running by automatically dividing a patch into a plurality of micro-updates using compiler analysis. The method includes providing the patch which includes updates to several variable units of the software, including functions, type definitions, and data stores. Next, an interference graph of the patch is generated by creating a node corresponding to each variable unit of the patch and creating connected components by adding edges connecting variable units having an impact expression with a non-zero intersection. The patch is divided into the micro-updates, where each micro-update corresponds to a connected component. The micro-updates are then applied to the software when the variable units of the micro-update are at a safepoint, and at least two of the micro-updates are applied at different times while the software is running.
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