8271395: Crash during printing when disposing textures

Reviewed-by: kcr, prr

modules/javafx.graphics/src/main/java/com/sun/javafx/tk/quantum/QuantumToolkit.java

@@ -445,6 +445,23 @@ public static <T> T runWithRenderLock(Supplier<T> supplier) {
         }
     }
 
+    public static void runInRenderThreadAndWait(Runnable runnable) {
+        try {
+            CountDownLatch latch = new CountDownLatch(1);
+            QuantumRenderer.getInstance().execute(() -> {
+                try {
+                    runnable.run();
+                } catch (Throwable e) {
+                    e.printStackTrace();
+                }
+                latch.countDown();
+            });
+            latch.await();
+        } catch (Throwable e) {
+            e.printStackTrace();
+        }
+    }
+
     boolean hasNativeSystemVsync() {
         return nativeSystemVsync;
     }

modules/javafx.graphics/src/main/java/com/sun/prism/impl/Disposer.java

@@ -25,6 +25,8 @@
 
 package com.sun.prism.impl;
 
+import com.sun.javafx.tk.quantum.QuantumToolkit;
+
 import java.lang.ref.Reference;
 import java.lang.ref.ReferenceQueue;
 import java.lang.ref.PhantomReference;
@@ -126,6 +128,10 @@ public static void disposeRecord(Disposer.Record rec) {
      * thread on which  the resources were created).
      */
     public static void cleanUp() {
+        if (!Thread.currentThread().getName().startsWith("QuantumRenderer")) {
+            QuantumToolkit.runInRenderThreadAndWait(() -> cleanUp());
+            return;
+        }
         disposerInstance.disposeUnreachables();
         disposerInstance.processDisposalQueue();
     }