This course is a KV (combined course consisting of lectures and
project work) in which you will learn the concepts and the
implementation of various system software components such as garbage collectors,
linkers, loaders, debuggers and text editors. In addition to the
principal algorithms the course will also discuss case studies of such
programs. The course is given in English. It is part of the Major Subjects
Software Engineering and Computational Engineering in the Computer Science
The course is taught on campus and is not streamed. If you missed a lecture you can watch the
video recordings from a previous semester.However,
it is strongly recommended, that you attend the lectures, because it is more lively and
also gives you the opportunity to ask questions.
|05.10.2023 ||Memory Management
|07.12.2023 ||Text Editors
|14.12.2023 ||Written Exam
|18.01.2024 ||Project submission
1. Memory Management
1.2 Allocation and deallocation of memory
1.3 Simple free list
1.4 Multiple free lists
1.5 Buddy system
1.6 Memory fragmentation
2. Garbage Collection
2.2 Basic techniques
2.2.1 Reference Counting
2.2.2 Mark & Sweep
2.2.3 Stop & Copy
2.3.1 Mark & Compact
2.3.2 Generation scavenging
2.4 Incremental garbage collection
2.4.1 Tricolor marking
2.4.2 Train algorithm
2.5 Finding root pointers
2.5.1 Pointer tables
2.5.2 Conservative garbage collection
2.6 Garbage collection in multi-threaded systems
2.8 Case study: Java Hotspot VM
2.9 Case study: .NET
3. Linkers and Loaders
3.2 Case study: Oberon
3.2.1 Run-time data structures
3.2.2 Resolving external references
3.2.3 Load algorithm
3.3 Case study: Java
3.3.2 Class files
3.3.3 Loading phases
3.3.4 Example: custom class loader
3.4 Linking/loading in C/C++
4.2 Case study: Java Platform Debugger
5. Text Editors
5.1 Data structures for texts
5.2 Text representation on the screen (case study)
5.2.1 Line descriptors
5.2.3 Input handling
5.2.4 Updating the view
The written exam will be on Thursday, December 14, 2023, 13:45-15:15 on campus. Please register via Kusss.
The room(s) will be announced on December 13 on ssw.jku.at.
In order to pass the course, you will have to implement the project as well. The final mark will be computed from
the exam (90 points) and from the project (15 points).
Part of the course will be a project in which either a garbage collector, a debugger or a text editor has to be implemented.
The project must be presented via Zoom on January 18, 2024 between 13:00 and 18:00.
Further details will follow.
- The slides can be downloaded from the Kusss page or the Moodle page of this course.
- Source code of the prototype editor
- Jones, R., Hosking, A., Moss, E.: The Garbage Collection Handbook. CRC Press, 2012
- Jones R., Lins R.: Garbage Collection. Algorithms for Automatic Dynamic Memory Management. Wiley, 1996.
- Venners B.: Inside the Java Virtual Machine. McGraw-Hill 1999. www.artima.com/insidejvm/ed2/
- Kokosa, K.: Pro .NET Memory Management. Apress 2018.
- Levine J.R.: Linkers & Loaders. Morgan Kaufmann, 2000.
- Rosenberg J.B.: How Debuggers Work. Algorithms, Data Structures, and Architecture. Wiley, 1996.
- Reference counting
- Collins, G. E: A method for overlapping and erasure of lists. Communications of the ACM 3, 12 (Dec 1960), 655-657
- Mark & Sweep
- McCarthy, J.: Recursive functions of symbolic expressions and their computation by machine. Communications of the ACM 3 (1960), 184-195.
- Schorr, Waite: An efficient machine-independent procedure for garbage collection in various list structures. Communications of the ACM (August 1967), 501-505
- Stop & Copy
- Cheney C.J.: A Nonrecursive List Compacting Algorithm. Communications of the ACM, 13(119):677-678, November 1970
- Generation Scavenging
- Ungar, D.: Generation scavenging: A nondisruptive high performance storage reclamation algorithm. ACM SIGPLAN Notices 19, 5 (May 1984) and ACM Software Engineering Notes 9, 3 (May 1984).
- Appel A.W.: Simple Generational Garbage Collection and Fast Allocation. Software Practice and Experience, 1988
- Ungar, D., Jackson, F.: An adaptive tenuring policy for generation scavengers. ACM Transactions on Programming Languages and Systems 1, 1 (January 1992), 1-27
- Pointer tables and conservative garbage collection
- Agesen O., Detlefs D.L.: Finding References in Java Stacks. OOPSLA’97 Garbage Collection and Memory Management Workshop. Atlanta, GA, October 1997. citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.47.6924.
- Boehm H.J., Weiser M.: 1988. Garbage collection in an uncooperative environment. Software -- Practice and Experience. 18(9):807-820
- Diwan A., Moss E., Hudson R.: Compiler Support for Garbage Collection in a Statically Typed Language. Proceedings PLDI'92, p. 273-282, San Francisco, CA, June 1992.
- Detlefs D., Printezis T.: A Generational Mostly-Concurrent Garbage Collector. Intl. Symp. on Memory Management (ISMM), 2000, 143-154. dl.acm.org/citation.cfm?id=362480
- Deutsch, L P., Bobrow, D. G.: An efficient incremental automatic garbage collector. Communications of the ACM 19,9 (Sept. 1976),522-526.
- Lieberman, H, Hewitt, C. A real-time garbage collector based on the lifetimes of objects. Communications of the ACM 26, 6 (June 1983), 419-429.