8269091: javax/sound/sampled/Clip/SetPositionHang.java failed with ArrayIndexOutOfBoundsException: Array index out of range: -4

Backport-of: b6a5d2082832c9d70051df8d4a5190f6a6faec58

Author: RealCLanger

src/java.desktop/share/classes/com/sun/media/sound/DirectAudioDevice.java

@@ -1377,8 +1377,9 @@ public void run() {
                     }
                 }
                 while (doIO && thread == curThread) {
-                    if (newFramePosition >= 0) {
-                        clipBytePosition = newFramePosition * frameSize;
+                    int npf = newFramePosition; // copy into local variable
+                    if (npf >= 0) {
+                        clipBytePosition = npf * frameSize;
                         newFramePosition = -1;
                     }
                     int endFrame = getFrameLength() - 1;

test/jdk/javax/sound/sampled/Clip/SetPositionHang.java

@@ -28,7 +28,7 @@
 
 /**
  * @test
- * @bug 8266421
+ * @bug 8266421 8269091
  * @summary Tests that Clip.setFramePosition/setMicrosecondPosition do not hang.
  */
 public final class SetPositionHang implements Runnable {