US 2007/0168989 A1 · Compressed program recording

Abstract

Program execution can be monitored and recorded for later playback. Certain state changes that can be predicted via a virtual processor during playback need not be recorded, so a compressed recording can be stored. To facilitate random access with respect to time during playback, key frames can be stored within the compressed recording. An index mechanism can associate key frames with particular memory addresses. Additionally, a snapshot of values for memory addresses can be used to further facilitate determining the value of a memory address without having to simulate execution. Multiprocessor executions can be supported, and playback can be done on a machine type different from that on which recording took place.

Claims20

Dependent claims

One or more computer-readable media comprising computer-executable instructions for performing a method comprising:

for a software program for which a recording of a monitored execution of the software program has been stored, receiving a request to indicate a value of a memory address modified during the monitored execution of the software program;
responsive to receiving the request, playing back the recording of the monitored execution of the software program, wherein the playing back comprises simulating execution of at least a portion of the software program via a virtual processor and determining the value of the memory address modified during the monitored execution of the software program;
and
indicating the value of the memory address modified during the monitored execution of the software program.

1 more element

Dependencies are inferred from the claim text.

Compressed program recording

Life of this patent

Compressed program recording

Life of this patent

Abstract

Claims20