JiTI: a robust just in time instrumentation technique

Authors:
Michiel Ronsse;Koen De Bosschere
Affiliations:
Department of Electronics and Information Systems, Ghent University, Belgium;Department of Electronics and Information Systems, Ghent University, Belgium
Venue:
ACM SIGARCH Computer Architecture News
Year:
2001

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Abstract

In this paper, we describe JiTI, a novel technique for instrumenting program binaries. The technique correctly deals with programs that contain traditionally hard to instrument features such as data in code, code in data, and self-modifying code. The technique does not require reverse engineering, program understanding tools or heuristics about the compiler or linker used. The basic is that a running process is cloned in memory, and that the cloned process is completely instrumented (code + data). By using the code of the instrumented process (clone) on the data of the original process, we can guarantee a correct instrumentation of the full code while keeping the process data untouched. JiTI has been completely implemented for SPARC processors and is used in a data race detector.