Microsoft Corporation
REDUCING TRACE RECORDING OVERHEADS WITH TARGETED RECORDING VIA PARTIAL SNAPSHOTS

Abstract:

During an execution of a first executable entity, a computer system determines that a target chunk of executable instructions is to be recorded during the execution. Prior to executing the target chunk of executable instructions, the computer system identifies one or more input(s) of the target chunk of executable instructions, and adjusts a page table entry to cause a page fault based on an access by a second executable entity to a first memory page that corresponds to an identified input, and/or an access by the first executable entity to a second memory page that does not correspond to any identified input. Based on detecting an occurrence of a page fault during an execution of the target chunk of executable instructions, the computer system detects that there an interference with an identified input by the second executable entity and/or an incompleteness of the identified inputs.