hg: jdk7/tl/jdk: 6806649: synchronization bottleneck when constructing Thread subclasses

[christopher.hegarty at sun.com]

Changeset: 0f4497002345
Author:    chegar
Date:      2009-02-23 10:36 +0000
URL:       http://hg.openjdk.java.net/jdk7/tl/jdk/rev/0f4497002345

6806649: synchronization bottleneck when constructing Thread subclasses
Summary: Replace subclass audits synchronization with ConcurrentHashMap with weakly referenced Class keys
Reviewed-by: peterjones, dholmes, martin

! src/share/classes/java/lang/Thread.java