commit 7f425b9b4faa936d0e57c69bbe7f1b3eee46ebb5
Author: Richard Reingruber <richard.reingruber@sap.com>
Date:   Tue Jan 16 09:14:07 2024 +0100

    Sleep in Thread::interrupt to expose race

diff --git a/src/java.base/share/classes/java/lang/Thread.java b/src/java.base/share/classes/java/lang/Thread.java
index c3a6a3de5bc..3f27d0edf75 100644
--- a/src/java.base/share/classes/java/lang/Thread.java
+++ b/src/java.base/share/classes/java/lang/Thread.java
@@ -1659,6 +1659,11 @@ public final void stop() {
         throw new UnsupportedOperationException();
     }
 
+    /**
+     * Just for debugging.
+     */
+    public static volatile boolean dbgSleepInInterrupt;
+
     /**
      * Interrupts this thread.
      *
@@ -1718,6 +1723,11 @@ public void interrupt() {
                 return;
             }
         }
+        if (dbgSleepInInterrupt) {
+            try {
+                Thread.sleep(2000);
+            } catch(Throwable t) { /* ignored*/ }
+        }
         interrupted = true;
         interrupt0();  // inform VM of interrupt
     }
diff --git a/src/java.base/share/classes/java/nio/channels/spi/AbstractInterruptibleChannel.java b/src/java.base/share/classes/java/nio/channels/spi/AbstractInterruptibleChannel.java
index 6adf2eb2276..ee36a56b5c3 100644
--- a/src/java.base/share/classes/java/nio/channels/spi/AbstractInterruptibleChannel.java
+++ b/src/java.base/share/classes/java/nio/channels/spi/AbstractInterruptibleChannel.java
@@ -174,6 +174,11 @@ private void trySetTarget(Thread target) {
      * closing and interruption for this channel.  </p>
      */
     protected final void begin() {
+        if (Thread.dbgSleepInInterrupt) {
+            try {
+                Thread.sleep(1000);
+            } catch(Throwable t) { /* ignored*/ }
+        }
         blockedOn(interruptor);
         Thread me = Thread.currentThread();
         if (me.isInterrupted()) {