Added reference counting to segments. Synchronization objects (mutex, semaphore, barrier, rwlock) now keep a pointer to a segment instead of copying a vector clock for modeling causal relationships.

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@7727 a5019735-40e9-0310-863c-91ae7b9d1cf9
10 files changed