K 10 svn:author V 7 davidxu K 8 svn:date V 27 2008-10-15T06:31:37.076783Z K 7 svn:log V 219 Move per-thread userland debugging flags into seperated field, this eliminates some problems of locking, e.g, a thread lock is needed but can not be used at that time. Only the process lock is needed now for new field. END