test/testlibrary/whitebox/sun/hotspot/WhiteBox.java

*** 23,32 ****
--- 23,36 ----
   */
  
  package sun.hotspot;
  
  import java.lang.reflect.Executable;
+ import java.util.Arrays;
+ import java.util.List;
+ import java.util.function.Function;
+ import java.util.stream.Stream;
  import java.security.BasicPermission;
  import sun.hotspot.parser.DiagnosticCommand;
  
  public class WhiteBox {
  
*** 141,158 ****
--- 145,190 ----
    // Intered strings
    public native boolean isInStringTable(String str);
  
    // Memory
    public native void readReservedMemory();
+   public native long allocateMetaspace(ClassLoader classLoader, long size);
+   public native void freeMetaspace(ClassLoader classLoader, long addr, long size);
  
    // force Full GC
    public native void fullGC();
  
    // Tests on ReservedSpace/VirtualSpace classes
    public native int stressVirtualSpaceResize(long reservedSpaceSize, long magnitude, long iterations);
    public native void runMemoryUnitTests();
    public native void readFromNoaccessArea();
+   public native long getThreadStackSize();
+   public native long getThreadRemainingStackSize();
  
    // CPU features
    public native String getCPUFeatures();
  
+   // VM flags
+   public native void    setBooleanVMFlag(String name, boolean value);
+   public native void    setIntxVMFlag(String name, long value);
+   public native void    setUintxVMFlag(String name, long value);
+   public native void    setUint64VMFlag(String name, long value);
+   public native void    setStringVMFlag(String name, String value);
+   public native void    setDoubleVMFlag(String name, double value);
+   public native Boolean getBooleanVMFlag(String name);
+   public native Long    getIntxVMFlag(String name);
+   public native Long    getUintxVMFlag(String name);
+   public native Long    getUint64VMFlag(String name);
+   public native String  getStringVMFlag(String name);
+   public native Double  getDoubleVMFlag(String name);
+   private final List<Function<String,Object>> flagsGetters = Arrays.asList(
+     this::getBooleanVMFlag, this::getIntxVMFlag, this::getUintxVMFlag,
+     this::getUint64VMFlag, this::getStringVMFlag, this::getDoubleVMFlag);
+ 
+   public Object getVMFlag(String name) {
+     return flagsGetters.stream()
+                        .map(f -> f.apply(name))
+                        .filter(x -> x != null)
+                        .findAny()
+                        .orElse(null);
+   }
  }