7069863: G1: SIGSEGV running SPECjbb2011 and -UseBiasedLocking Summary: Align the reserved size of the heap and perm to the heap region size to get a preferred heap base that is aligned to the region size, and call the correct heap reservation constructor. Also add a check in the heap reservation code that the reserved space starts at the requested address (if any). Reviewed-by: kvn, ysr

// A simple class to extend an abstract class and get loaded with different
// loaders.  This class is loaded via LOADER2.
public class from_loader2 implements IFace {
  public many_loader[] gen() {
    many_loader[] x = new many_loader[1];
    x[0] = new many_loader();
    return x;
  }
}