Dynamic deadlock verification for general barrier synchronisation
We present Armus, a dynamic verification tool for deadlock detection and avoidance specialised in barrier synchronisation. Barriers are used to coordinate the execution of groups of tasks, and serve as a building block of parallel computing. Our tool verifies more barrier synchronisation patterns than current state-of-the-art. To improve the scalability of verification, we introduce a novel event-based representation of concurrency constraints, and a graph-based technique for deadlock analysis. The implementation is distributed and fault-tolerant, and can verify X10 and Java programs.
The Armus-X10 and JArmus applications are the first deadlock verification tools for X10 clocks and the Java phaser API, featuring: distributed deadlock detection where the tool reports existing deadlocks, and local deadlock avoidance where the tool raises an exception before entering a deadlock.
Virtual machine appliance
We provide a virtual machine appliance with the source code, compiled binaries, and usage instructions:
- Start VirtualBox.
- Import the appliance file
Import Appliance ...).
- Boot the Armus machine (a browser and a terminal will be available).
- Follow the instructions in the browser.
If necessary, the appliance's username is
armus and password
Building the source code
To build JArmus:
git clone https://bitbucket.org/cogumbreiro/jarmus -b 2.0 cd jarmus ant
To build Armus-X10:
git clone https://bitbucket.org/cogumbreiro/armus-x10 -b 2.0 cd armus-x10 ant
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