Reviewed-by: kvn, thartmann

Summary: Add missing barrier, sharing code with Unsafe_GetObject.
Reviewed-by: kbarrett, mgerdin, pliden, tschatzl

Reviewed-by: stuefe, shade, dholmes

Reviewed-by: dholmes, lfoltan

Summary: Changes to successfully compile class oop within oops/oopsHierarchy.hpp for PPC build (with gcc 4.1.2).
Reviewed-by: dholmes, hseigel

8041623: Solaris Studio 12.4 C++ 5.13, CHECK_UNHANDLED_OOPS use of class oop's copy constructor definitions causing error level diagnostic.
Summary: Fix several minor compilation issues with volatile oops for CHECK_UNHANDLED_OOPS support.
Reviewed-by: coleenp, hseigel

Summary: Fixed incompatible uses of EXCEPTION_MARK and CHECK macros in AttachListener::init(), handle exception locally.
Reviewed-by: minqi, coleenp

Reviewed-by: dholmes, kbarrett, ihse

Reviewed-by: kvn, dholmes, poonam