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Identifier 000417257
Title Hardware accelerated control-flow reconstruction in JIT environments
Alternative Title Ανακατασκευή της ροής εκτέλεσης προγράμματος σε περιβάλλοντα JIT με τη χρήση υλικού
Author Κλεφτογιώργος, Κωνσταντίνος Δ.
Thesis advisor Μαρκάτος, Ευάγγελος
Reviewer Ιωαννίδης, Σωτήρης
Παπαδοπούλη, Μαρία
Abstract Control-Flow reconstruction is a critical part of many security, profiling and analysis mechanisms. A challenging limitation in previous works is that they do not support tracing in JIT environments. Already existing mechanisms of obtaining the Control-Flow of a process, include the use of instrumentation, either dynamic or static. However, these approaches suffer from certain drawbacks. Obtaining the Control-Flow through dynamic instrumentation during the execution of a process, imposes severe slowdowns, while static instrumentation can lead to inaccurate results. We leverage Intel Processor Trace, a new hardware feature of modern Intel CPUs, in order to acquire the Control-Flow of a process correctly, while at the same time minimizing the impact on the performance. Previous works have shown the effectiveness of utilizing Intel PT in order to reconstruct the Control-Flow of a process. However, none of them, to the best of our knowledge, has attempted to perform Control-Flow reconstruction on a process executing inside a JIT environment. To showcase our mechanism in JIT environments, we trace the execution of a process in Intel Pin dynamic instrumentation framework. To achieve this we implemented a custom Intel PT driver and a new decoder which enables us to reconstruct the Control-Flow at runtime and not after the completion of the process. This approach imposes significantly less overhead, compared to dynamic binary instrumentation, while being more accurate than the static one. Finally, we evaluate the correctness of our mechanism and measure its performance by running SPEC2006 benchmark suit. Our results indicate that the overhead imposed by our mechanism, is marginally lower than previously developed mechanisms, while the Control-Flow is accurately reconstructed.
Language English
Subject Intel PT
Just in time
Ροή εκτέλεσης
Issue date 2018-07-20
Collection   Faculty/Department--Faculty of Sciences and Engineering--Department of Computer Science--Post-graduate theses
  Type of Work
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