Write-barrier maintenance in a garbage collector

Details Write-barrier maintenance in a garbage collector Write-barrier maintenance in a garbage collector

2005-08-16

2005-08-16

Jung, David (Department: 2134)

Data processing: database and file management or data structures

Database design

Data structure types

C707S793000, C707S793000

Reexamination Certificate

active

06931423

ABSTRACT:
An approach is provided for maintaining a write barrier during an assignment operation between a source object and a target object. A source tag is obtained from a first reference to the source object, and a target tag is obtained from a second reference to the target object. The source tag and the target tag are compared, such that if the source tag is in a predetermined relationship with the target tag, then a data structure (e.g., a remember table or exit table) associated with the write barrier is updated in accordance with the assignment operation. In one embodiment, the routine to update the data structure is dispatched from a function table based on a tag value in a header associated with the source object.

REFERENCES:
Hardware-based solution detecting illegal references in real-time Java Higuera-Toledano, M.T.; Real-Time Systems, 2003. Proceedings, 15th Euromicro Conference on , Jul. 2-4, 2003.
Do generational schemes improve the garbage collection efficiency?Srisa-an, W.; Chang, J.M.; Chia-Tien Dan Lo; Performance Analysis of Systems and Software, 2000. ISPASS. 2000 IEEE International Symposium on , Apr. 24-25, 2000.
Dynamic detection of access errors and illegal references in RTSJ Higuera-Toledano, T.M.; de Miguel-Cabello, M.A.; Real-Time and Embedded Technology and Applications Symposium, 2002. Proceedings. Eighth IEEE Sep. 24-27, 2002.

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