System for measuring program execution by replacing an executable instruction with interrupt causing instruction
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United States of America Patent
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-
Mar 20, 1990
Grant Date -
N/A
app pub date -
Jul 10, 1987
filing date -
Jul 10, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A computer program measures the execution of machine code instructions in an executing program. A copy of the measured program is made and selected machine instructions are replaced by interrupt-causing breakpoint instructions. As each breakpoint instruction is executed, the breakpoint is replaced by the actual instruction, and a bit map is updated to indicate execution of the measured instruction. Execution resumes with the actual instruction.
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