The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 05, 1999
Filed:
Jun. 26, 1997
Marc Tremblay, Palo Alto, CA (US);
James Michael O'Connor, Union City, CA (US);
Guy L Steele, Jr, Lexington, MA (US);
Sanjay Vishin, Sunnyvale, CA (US);
Ole Agesen, Franklin, MA (US);
Steven Heller, Chelmsford, MA (US);
Derek R White, Reading, MA (US);
Sun Microsystems, Inc., Palo Alto, CA (US);
Abstract
A partially relocated object identifier store including 'copy from' and 'copy to' identifier storage accessible to write and read barrier logic allows the write and read barrier logic to selectively direct store- and load-oriented accesses to an appropriate FromSpace or ToSpace instance of a partially relocated memory object, in accordance with the memory object's partial relocation state. In some embodiments, the barriers trap to a partially relocated object trap handler. In other embodiments, the write barrier itself directs accesses without software trap handler overheads. Optional 'how far' indication storage facilitates differentiation by the barrier logic, or by the partially relocated object trap handler, between a copied portion and an uncopied portion of the partially relocated memory object.