Calculation of jmm_GetMemoryUsage is wrong

It seems that calculation of MemoryMXBean.getNonHeapMemoryUsage(jmm_GetMemoryUsage) is wrong.

Currently, NonHeapUsage = CodeCache + Metaspace + CompressedClassSpace

==> CodeHeap 'non-nmethods' 1532544 (Used)
==> CodeHeap 'profiled nmethods' 0
==> CodeHeap 'non-profiled nmethods' 13952
==> Metaspace 506696
==> Compressed Class Space 43312
init = 7667712(7488K) used = 2096504(2047K) committed = 8454144(8256K) max = -1(-1K)

In this way, getNonHeapMemoryUsage is larger than it ought to be, it should be NonHeapUsage = CodeCache + Metaspace.