Browsing by Subject "Software systems"

Now showing 1 - 5 of 5

Open Access
Deploy-DDS: Tool framework for supporting deployment architecture of data distribution service based systems
(ACM, 2014-08) Çelik, T.; Köksal, O.; Tekinerdoğan, Bedir
Data Distribution Service (DDS) is the Object Management Group's (OMG) new standard middleware after Common Object Request Broker Architecture (CORBA), which is becoming increasingly popular. One of the important problems in DDS Based Software Systems is the deployment configuration of DDS modules to the physical resources. In general, this can be done in many different ways whereby each deployment alternative will perform differently. Currently, the deployment configuration is decided after the coding phase and usually performed manually. For large configurations, finding the feasible deployment might require serious rework with costly and time consuming iterations. In this paper, we present the tool Deploy-DDS to support the selection and generation of deployment architectures of DDS based systems. The tool can be used to perform an evaluation during the design phase and generate the selected feasible configuration. © 2014 Authors.
Open Access
Flora: a framework for decomposing software architecture to introduce local recovery
(John Wiley & Sons Ltd., 2009-07) Sözer, H.; Tekinerdoǧan, B.; Akşit, M.
The decomposition of software architecture into modular units is usually driven by the required quality concerns. In this paper we focus on the impact of local recovery concern on the decomposition of the software system. For achieving local recovery, the system needs to be decomposed into separate units that can be recovered in isolation. However, it appears that this required decomposition for recovery is usually not aligned with the decomposition based on functional concerns. Moreover, introducing local recovery to a software system, while preserving the existing decomposition, is not trivial and requires substantial development and maintenance effort. To reduce this effort we propose a framework that supports the decomposition and implementation of software architecture for local recovery. The framework provides reusable abstractions for defining recoverable units and the necessary coordination and communication protocols for recovery. We discuss our experiences in the application and evaluation of the framework for introducing local recovery to the open-source media player called MPlayer. Copyright 2009 John Wiley & Sons, Ltd.
Open Access
G-free: Defeating return-oriented programming through gadget-less binaries
(ACM, 2010-12) Onarlıoğlu, Kaan; Bilge, L.; Lanzi, A.; Balzarotti, D.; Kirda, E.
Despite the numerous prevention and protection mechanisms that have been introduced into modern operating systems, the exploitation of memory corruption vulnerabilities still represents a serious threat to the security of software systems and networks. A recent exploitation technique, called Return-Oriented Programming (ROP), has lately attracted a considerable attention from academia. Past research on the topic has mostly focused on refining the original attack technique, or on proposing partial solutions that target only particular variants of the attack. In this paper, we present G-Free, a compiler-based approach that represents the first practical solution against any possible form of ROP. Our solution is able to eliminate all unaligned free-branch instructions inside a binary executable, and to protect the aligned free-branch instructions to prevent them from being misused by an attacker. We developed a prototype based on our approach, and evaluated it by compiling GNU libc and a number of real-world applications. The results of the experiments show that our solution is able to prevent any form of return-oriented programming. © 2010 ACM.
Open Access
Market-driven approach based on Markov decision theory for optimal use of resources in software development
(Institution of Engineering and Technology, 2004) Noppen, J.; Aksit, M.; Nicola, V.; Tekinerdogan, B.
Changes in requirements may have a severe impact on development processes. For example, if requirements change during the course of a software development activity, it may be necessary to reschedule development activities so that the new requirements can be addressed in a timely manner. Unfortunately, current software development methods do not provide explicit means to adapt development processes with respect to changes in requirements. The paper proposes a method based on Markov decision theory, which determines the estimated optimal development schedule with respect to probabilistic product demands and resource constraints. This method is supported by a tool and applied to an industrial case.
Open Access
Variability viewpoint for introducing variability in software architecture viewpoints
(ACM, 2012) Tekinerdogan, Bedir; Sözer H.
Variability is the ability of a software system to be changed for a specific context, in a preplanned manner. As such, to facilitate the instantiation of a software architecture the variability concern needs to be explicitly addressed. Usually, architectural concerns are represented using architecture views that are derived from the corresponding architecture viewpoints. Different software architecture viewpoints have been introduced to support the modeling, understanding, communication and analysis of the software architecture for different stakeholders. Regarding variability we can observe that this has been mainly addressed in separate variability modeling approaches. In this paper we first provide a short overview of the approaches for dealing with variability at the architecture design level and then introduce the variability viewpoint. The variability viewpoint addresses the concerns for variability and can be used to introduce variability in software architecture viewpoints. Copyright 2012 ACM.