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:
Jul. 31, 2018
Filed:
Oct. 19, 2015
Google Llc, Mountain View, CA (US);
Richard Lewis Hudson, Florence, MA (US);
Russell Stensby Cox, Brookline, MA (US);
David Read Chase, Belmont, MA (US);
Austin Thomas Kona Clements, Arlington, MA (US);
Google LLC, Mountain View, CA (US);
Abstract
A present disclosure provides a garbage collector capable of freeing memory reachable only by a terminated thread immediately upon thread exit without scanning the heap or blocking other threads. A heap, including a plurality of spans, is walked, for example when the heap reaches a predetermined size. Reachable objects are marked in a mark bitmap. A mutator sweeps the mark bitmap without clearing mark bits, and newly allocated objects are not marked. When the thread terminates, sweep pointers in each of the spans owned by the terminated thread are reset. Moreover, a write barrier that makes a first unpublished object reachable from a second published object, also publishes the first object and all objects reachable from the first object.