Binary rewriting system

A hybrid static/dynamic binary rewrite method is presented, comprising: a one-time configuration step for instrumentation of an unmodified executable binary, invoking the executable binary by copying the unmodified executable binary into a system memory image and running the binary from the system memory image, and rewriting the system memory image by inserting at a safe location one or more new instructions in place of existing instructions, where the one or more new instructions transfer execution control to instrumentation instructions located elsewhere within the system memory image, and where the instrumentation instructions that were at least in part not contained in the unmodified executable binary.