src/java.base/share/classes/java/nio/Buffer.java

rev 51055 : 8207235: ManagementFactory.getPlatformMXBeans(BufferPoolMXBean.class) throws NPE
Reviewed-by: alanb

*** 24,33 ****
--- 24,35 ----
   */
  
  package java.nio;
  
  import jdk.internal.HotSpotIntrinsicCandidate;
+ import jdk.internal.misc.JavaNioAccess;
+ import jdk.internal.misc.SharedSecrets;
  import jdk.internal.misc.Unsafe;
  
  import java.util.Spliterator;
  
  /**
*** 705,710 ****
--- 707,731 ----
      static void checkBounds(int off, int len, int size) { // package-private
          if ((off | len | (off + len) | (size - (off + len))) < 0)
              throw new IndexOutOfBoundsException();
      }
  
+     static {
+         // setup access to this package in SharedSecrets
+         SharedSecrets.setJavaNioAccess(
+             new JavaNioAccess() {
+                 @Override
+                 public JavaNioAccess.BufferPool getDirectBufferPool() {
+                     return Bits.BUFFER_POOL;
+                 }
+                 @Override
+                 public ByteBuffer newDirectByteBuffer(long addr, int cap, Object ob) {
+                     return new DirectByteBuffer(addr, cap, ob);
+                 }
+                 @Override
+                 public void truncate(Buffer buf) {
+                     buf.truncate();
+                 }
+             });
+     }
+ 
  }