import sun.jvm.hotspot.memory.MemRegion; //导入依赖的package包/类
private void addLiveRegions(String name, List input, List output) {
  Iterator itr = input.iterator();

  while(itr.hasNext()) {
    MemRegion reg = (MemRegion)itr.next();
    Address top = reg.end();
    Address bottom = reg.start();
    if(Assert.ASSERTS_ENABLED) {
      Assert.that(top != null, "top address in a live region should not be null");
    }

    if(Assert.ASSERTS_ENABLED) {
      Assert.that(bottom != null, "bottom address in a live region should not be null");
    }

    output.add(top);
    output.add(bottom);
  }

}
 

import sun.jvm.hotspot.memory.MemRegion; //导入依赖的package包/类
@Override
public void printOn(PrintStream tty) {
    MemRegion mr = reservedRegion();

    tty.print("garbage-first heap");
    tty.print(" [" + mr.start() + ", " + mr.end() + "]");
    tty.println(" region size " + (HeapRegion.grainBytes() / 1024) + "K");
}
 

import sun.jvm.hotspot.memory.MemRegion; //导入依赖的package包/类
public long capacity() {
    Address g1CommittedAddr = addr.addOffsetTo(g1CommittedFieldOffset);
    MemRegion g1Committed = new MemRegion(g1CommittedAddr);
    return g1Committed.byteSize();
}
 

import sun.jvm.hotspot.memory.MemRegion; //导入依赖的package包/类
@Override
public List getLiveRegions() {
    List res = new ArrayList();
    res.add(new MemRegion(bottom(), top()));
    return res;
}