Reviewed-by: dholmes

Summary: check cacheline sine only for one core on sun4v SPARC systems.
Reviewed-by: kvn

Summary: Add SO_AllCodeCache to root scanning options when not unloading classes with a CMS collection cycle
Reviewed-by: mgerdin, jwilhelm

Reviewed-by: dholmes

Summary: Added check to prevent reentry of signal chaining code
Reviewed-by: dcubed, acorn, dholmes

Reviewed-by: tbell, iris

Summary: Fix up GPL headers by removing leading "#" so that the RE script works.
Reviewed-by: brutisso, coleenp