Dosso - automatic detector of shared objects in multithreaded java programs

Tolubaeva, Munara
In this thesis, we present a simple and efficient automated analysis tool called DoSSO that detects shared objects in multithreaded Java programs. DoSSO reports only the shared objects that are modified by at least one thread. Based on this tool, we propose a new approach in developing concurrent software where programmers implement the system without considering synchronization issues first and then use appropriate locking mechanism only for the objects reported by DoSSO. To evaluate the applicability of DoSSO, we have conducted a case study on a distributed and concurrent system with graphical user interfaces. Case study results showed that DoSSO is able to identify objects that become shared among explicitly defined threads and event threads, and objects that become shared through RMI.


A metrics-based approach to the testing process and testability of object-oriented software systems
Yurga, Tolga; Doğru, Ali Hikmet; Department of Information Systems (2009)
This dissertation investigates the factors that affect testability and testing cost of object- oriented software systems. Developing a software program which eases the testing process by increasing testability is crucial. Also, to assess whether or not the testing effort and cost consumed or planned is adequate or not is another critical matter this dissertation aims to answer by composing a new way to evaluate the links between software design parameters and testing effort via source-based metrics. An auto...
Concurrency control for distributed multiversion databases through time intervals
Halıcı, Uğur (1991-04-01)
© 1991 ACM.Multiversion Schedulers are now a widely accepted method for enhancing performance of the concurrency control component of a database. When the read and write sets of transactions are known in advance, the amount of concurrency provided by the Multiversion Schedulers can further be improved. In this paper, a new concurrency control technique, which uses multiversion data in conjunction with predeclared read-write sets and the Time Interval technique is suggested. With the proposed method, a trans...
Automatic Detection of Shared Objects in Multithreaded Java Programs
Tolubaeva, Munara; Betin Can, Aysu (2008-12-12)
This paper presents a simple and efficient automated tool called DoSSO that detects shared objects in multithreaded Java programs. Our main goal is to help programmers see all potentially shared objects that may cause some complications at runtime. This way programmers can implement a concurrent software without considering synchronization issues and then use appropriate locking mechanism based on the DoSSO results. To illustrate the effectiveness of our tool, we have petformed an experiment on a multithrea...
Content based packet filtering in linux kernel using deterministic finite automata
Bilal, Tahir; Şehitoğlu, Onur Tolga; Department of Computer Engineering (2011)
In this thesis, we present a content based packet filtering Architecture in Linux using Deterministic Finite Automata and iptables framework. New generation firewalls and intrusion detection systems not only filter or inspect network packets according to their header fields but also take into account the content of payload. These systems use a set of signatures in the form of regular expressions or plain strings to scan network packets. This scanning phase is a CPU intensive task which may degrade network p...
Evaluation and selection of case tools: a methodology and a case study
Okşar, Koray; Okşar, Koray; Department of Information Systems (2010)
Today’s Computer Aided Software Engineering (CASE) technology covers nearly all activities in software development ranging from requirement analysis to deployment.Organizations are evaluating CASE tool solutions to automate or ease their processes. While reducing human errors, these tools also increase control, visibility and auditability of the processes. However, to achieve these benefits, the right tool or tools should be selected for usage in the intended processes. This is not an easy task when the vas...
Citation Formats
M. Tolubaeva, “Dosso - automatic detector of shared objects in multithreaded java programs,” M.S. - Master of Science, Middle East Technical University, 2009.