src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/DeadlockDetector.java

rev 54717 : imported patch 8223306

@@ -144,14 +144,11 @@
     private static ObjectHeap heap;
     private static HashMap threadTable;
 
     private static void createThreadTable() {
         threadTable = new HashMap();
-        for (JavaThread cur = threads.first(); cur != null; cur = cur.next()) {
-            // initialize dfn for each thread to -1
-            threadTable.put(cur, new Integer(-1));
-        }
+        VM.getVM().getThreads().doJavaThreads((thread) -> threadTable.put(thread, new Integer(-1)));
     }
 
     private static int dfn(JavaThread thread) {
         Object obj = threadTable.get(thread);
         if (obj != null) {