Real time software analyzing system for storing selective m-bit addresses based upon correspondingly generated n-bit tags
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United States of America Patent
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Jun 26, 1990
Issued Date -
N/A
app pub date -
Feb 29, 1988
filing date -
Sep 18, 1985
priority date (Note) -
Expired
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Abstract
A software analysis system for acquiring, storing, and analyzing certain predetermined characteristics of a computer program includes a method and apparatus for acquiring certain lines of high-level language instruction code without the need for statistical sampling. Each line of instruction code generates at least one address in assembly language which is encoded with a tag and stored in a first-in, first-out memory. The memory output is asynchronous with its output such that tagged addresses are stored in real time but extracted from memory at a predetermined rate. This allows the system to acquire all software event of interest. Each tagged address is also marked with a time stamp so that the time between acquisition of each of the software events of interest may be analyzed to determine, for example, the length of time spent in a particular subroutine.
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