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:
Dec. 16, 2003
Filed:
Apr. 27, 2000
Erik Ruf, Redmond, WA (US);
Microsoft Corporation, Redmond, WA (US);
Abstract
Synchronization optimization for statically compiled Java programs is performed in three phases: Thread closure analysis, Alias analysis, and Specialization and transformation. Thread closure analysis bounds the number of thread instances constructed at each thread allocation site, and determines the set of methods potentially executed by each thread instance. Alias analysis generates equivalence class representation based alias signatures for each method. These signatures describe the aliasing and synchronization behavior of each method. The specialization and transformation phase traverses a call graph in a top-down manner starting from the program entry point, and creates specialized copies of methods when they can be individually optimized. A synchronization operation is removed from the code whenever it can be proven that all objects reaching the operation at runtime can be synchronized by at most one thread instance.