Landslide is a concurrency testing framework for student thread library and kernel projects. It uses systematic testing (also known as stateless model checking) to exhaustively test all thread interleavings possible under a given test program, or failing that, heuristically prioritizes the most promising preemption points to find bugs as quickly as possible should they exist.

If you are a current student please make sure to complete the sign-up form before using Landslide:

• CMU version: http://tinyurl.com/landslide-p2-s18
• PSU version: https://tinyurl.com/landslide-psu-s18

The lecture slides associated with this research are available at:

• CMU version: http://www.cs.cmu.edu/~410/lectures/L14_Landslide.pdf
• PSU version: (available on the internal class website)

Other reading material:

• Paper on hardware transactional memory (SIGBOVIK '18): http://www.contrib.andrew.cmu.edu/~bblum/htm.pdf
• Ph.D. thesis proposal (CMU '17): http://www.contrib.andrew.cmu.edu/~bblum/thesprop.pdf
• Paper on data-race preemption points (OOPSLA '16): http://www.contrib.andrew.cmu.edu/~bblum/oopsla.pdf
• Masters thesis (CMU '12): http://www.contrib.andrew.cmu.edu/~bblum/thesis.pdf

Guide to this repository:

• src/bochs-2.6.8.tar.bz2: unmodified distribution of the Bochs simulator
• src/landslide: Landslide
• src/patches: Interface code between Landslide and Bochs, including a patch to edit its API slightly, the Makefile, and the module entrypoint.
• id/: Quicksand (the iterative deepening wrapper described in the OOPSLA paper)
• *-setup.sh: student-friendly initialization scripts for various class projects
• pebsim/: directory for running bochs (config files, annotation scripts)
• pebsim/p2-basecode: directory for importing Pebbles thread library code
• pebsim/pintos: directory for importing Pintos kernel code

The code in this repository is distributed under mixed licenses according to the following directory structure:

• Landslide (src/landslide), Quicksand (id/), and all the instrumentation scripts (pebsim/*.sh) are distributed under the 3-clause BSD license (LICENSE).

• Bochs (src/bochs-2.6.8.tar.bz2) is licensed under the LGPL and distributed in its unmodified tarball. Its license is contained therein.

• Interface code between Landslide and Bochs (src/patches/) is subject to LGPL.

• Landslide incorporates the Linux rbtree implementation (src/rbtree) which is licensed under GPLv2.

• The P2 basecode (pebsim/p2-basecode/p2-*.tar.bz2) is distributed unlicensed with express permission from its copyright holders; please refer to the its LICENSE file in the tarball.

Linking Landslide with Bochs and the rbtree produces a result which is subject to the terms of the GPL to redistribute. For further information please contact Ben Blum bblum0@gmail.com or Dave Eckhardt David.Eckhardt@cs.cmu.edu.