--- old/src/hotspot/share/gc/g1/g1ConcurrentMark.cpp	2019-11-28 15:24:14.928773229 +0100
+++ new/src/hotspot/share/gc/g1/g1ConcurrentMark.cpp	2019-11-28 15:24:14.657764007 +0100
@@ -55,6 +55,7 @@
 #include "include/jvm.h"
 #include "logging/log.hpp"
 #include "memory/allocation.hpp"
+#include "memory/iterator.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/universe.hpp"
 #include "oops/access.inline.hpp"
--- old/src/hotspot/share/gc/g1/g1ConcurrentMark.hpp	2019-11-28 15:24:16.144814607 +0100
+++ new/src/hotspot/share/gc/g1/g1ConcurrentMark.hpp	2019-11-28 15:24:15.875805453 +0100
@@ -45,6 +45,7 @@
 class G1OldTracer;
 class G1RegionToSpaceMapper;
 class G1SurvivorRegions;
+class ThreadClosure;
 
 PRAGMA_DIAG_PUSH
 // warning C4522: multiple assignment operators specified
--- old/src/hotspot/share/gc/g1/g1ConcurrentRefine.cpp	2019-11-28 15:24:17.325854794 +0100
+++ new/src/hotspot/share/gc/g1/g1ConcurrentRefine.cpp	2019-11-28 15:24:17.057845675 +0100
@@ -29,6 +29,7 @@
 #include "gc/g1/g1DirtyCardQueue.hpp"
 #include "logging/log.hpp"
 #include "memory/allocation.inline.hpp"
+#include "memory/iterator.hpp"
 #include "runtime/java.hpp"
 #include "runtime/thread.hpp"
 #include "utilities/debug.hpp"
--- old/src/hotspot/share/gc/g1/g1DirtyCardQueue.cpp	2019-11-28 15:24:18.488894369 +0100
+++ new/src/hotspot/share/gc/g1/g1DirtyCardQueue.cpp	2019-11-28 15:24:18.220885250 +0100
@@ -34,6 +34,7 @@
 #include "gc/g1/heapRegionRemSet.hpp"
 #include "gc/shared/suspendibleThreadSet.hpp"
 #include "gc/shared/workgroup.hpp"
+#include "memory/iterator.hpp"
 #include "runtime/flags/flagSetting.hpp"
 #include "runtime/mutexLocker.hpp"
 #include "runtime/orderAccess.hpp"
--- old/src/hotspot/share/gc/g1/g1RemSetSummary.cpp	2019-11-28 15:24:19.662934318 +0100
+++ new/src/hotspot/share/gc/g1/g1RemSetSummary.cpp	2019-11-28 15:24:19.394925199 +0100
@@ -34,6 +34,7 @@
 #include "gc/g1/heapRegion.hpp"
 #include "gc/g1/heapRegionRemSet.hpp"
 #include "memory/allocation.inline.hpp"
+#include "memory/iterator.hpp"
 #include "runtime/thread.inline.hpp"
 
 void G1RemSetSummary::update() {
--- old/src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp	2019-11-28 15:24:20.833974166 +0100
+++ new/src/hotspot/share/gc/parallel/parallelScavengeHeap.cpp	2019-11-28 15:24:20.566965080 +0100
@@ -44,6 +44,7 @@
 #include "gc/shared/locationPrinter.inline.hpp"
 #include "gc/shared/scavengableNMethods.hpp"
 #include "logging/log.hpp"
+#include "memory/iterator.hpp"
 #include "memory/metaspaceCounters.hpp"
 #include "memory/universe.hpp"
 #include "oops/oop.inline.hpp"
--- old/src/hotspot/share/gc/parallel/psScavenge.cpp	2019-11-28 15:24:22.016014387 +0100
+++ new/src/hotspot/share/gc/parallel/psScavenge.cpp	2019-11-28 15:24:21.747005233 +0100
@@ -52,6 +52,7 @@
 #include "gc/shared/weakProcessor.hpp"
 #include "gc/shared/workerPolicy.hpp"
 #include "gc/shared/workgroup.hpp"
+#include "memory/iterator.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/universe.hpp"
 #include "logging/log.hpp"
--- old/src/hotspot/share/gc/shared/genCollectedHeap.cpp	2019-11-28 15:24:23.201054710 +0100
+++ new/src/hotspot/share/gc/shared/genCollectedHeap.cpp	2019-11-28 15:24:22.932045557 +0100
@@ -55,6 +55,7 @@
 #include "gc/shared/weakProcessor.hpp"
 #include "gc/shared/workgroup.hpp"
 #include "memory/filemap.hpp"
+#include "memory/iterator.hpp"
 #include "memory/metaspaceCounters.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/universe.hpp"
--- old/src/hotspot/share/gc/shared/stringdedup/stringDedup.cpp	2019-11-28 15:24:24.394095306 +0100
+++ new/src/hotspot/share/gc/shared/stringdedup/stringDedup.cpp	2019-11-28 15:24:24.127086220 +0100
@@ -27,6 +27,7 @@
 #include "gc/shared/stringdedup/stringDedupQueue.hpp"
 #include "gc/shared/stringdedup/stringDedupTable.hpp"
 #include "gc/shared/stringdedup/stringDedupThread.hpp"
+#include "memory/iterator.hpp"
 
 bool StringDedup::_enabled = false;
 
--- old/src/hotspot/share/gc/shared/stringdedup/stringDedup.hpp	2019-11-28 15:24:25.570135323 +0100
+++ new/src/hotspot/share/gc/shared/stringdedup/stringDedup.hpp	2019-11-28 15:24:25.302126204 +0100
@@ -69,6 +69,8 @@
 #include "memory/allocation.hpp"
 #include "runtime/thread.hpp"
 
+class ThreadClosure;
+
 //
 // Main interface for interacting with string deduplication.
 //
--- old/src/hotspot/share/gc/shared/workgroup.cpp	2019-11-28 15:24:26.744175273 +0100
+++ new/src/hotspot/share/gc/shared/workgroup.cpp	2019-11-28 15:24:26.476166153 +0100
@@ -28,6 +28,7 @@
 #include "gc/shared/workerManager.hpp"
 #include "memory/allocation.hpp"
 #include "memory/allocation.inline.hpp"
+#include "memory/iterator.hpp"
 #include "runtime/atomic.hpp"
 #include "runtime/os.hpp"
 #include "runtime/semaphore.hpp"
--- old/src/hotspot/share/gc/shared/workgroup.hpp	2019-11-28 15:24:27.925215460 +0100
+++ new/src/hotspot/share/gc/shared/workgroup.hpp	2019-11-28 15:24:27.657206340 +0100
@@ -50,6 +50,7 @@
 
 class AbstractGangWorker;
 class Semaphore;
+class ThreadClosure;
 class WorkGang;
 
 // An abstract task to be worked on by a gang.
--- old/src/hotspot/share/gc/z/zCollectedHeap.cpp	2019-11-28 15:24:29.103255545 +0100
+++ new/src/hotspot/share/gc/z/zCollectedHeap.cpp	2019-11-28 15:24:28.835246426 +0100
@@ -33,6 +33,7 @@
 #include "gc/z/zServiceability.hpp"
 #include "gc/z/zStat.hpp"
 #include "gc/z/zUtils.inline.hpp"
+#include "memory/iterator.hpp"
 #include "memory/universe.hpp"
 #include "runtime/mutexLocker.hpp"
 #include "utilities/align.hpp"
--- old/src/hotspot/share/gc/z/zHeap.hpp	2019-11-28 15:24:30.285295767 +0100
+++ new/src/hotspot/share/gc/z/zHeap.hpp	2019-11-28 15:24:30.016286613 +0100
@@ -39,6 +39,8 @@
 #include "gc/z/zUnload.hpp"
 #include "gc/z/zWorkers.hpp"
 
+class ThreadClosure;
+
 class ZHeap {
   friend class VMStructs;
 
--- old/src/hotspot/share/gc/z/zRootsIterator.cpp	2019-11-28 15:24:31.455335580 +0100
+++ new/src/hotspot/share/gc/z/zRootsIterator.cpp	2019-11-28 15:24:31.187326460 +0100
@@ -39,6 +39,7 @@
 #include "gc/z/zRootsIterator.hpp"
 #include "gc/z/zStat.hpp"
 #include "gc/z/zThreadLocalData.hpp"
+#include "memory/iterator.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/universe.hpp"
 #include "prims/jvmtiExport.hpp"
--- old/src/hotspot/share/gc/z/zRuntimeWorkers.hpp	2019-11-28 15:24:32.634375699 +0100
+++ new/src/hotspot/share/gc/z/zRuntimeWorkers.hpp	2019-11-28 15:24:32.366366580 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -26,6 +26,8 @@
 
 #include "gc/shared/workgroup.hpp"
 
+class ThreadClosure;
+
 class ZRuntimeWorkers {
 private:
   WorkGang _workers;
--- old/src/hotspot/share/gc/z/zWorkers.hpp	2019-11-28 15:24:33.806415580 +0100
+++ new/src/hotspot/share/gc/z/zWorkers.hpp	2019-11-28 15:24:33.539406495 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -27,6 +27,7 @@
 #include "gc/shared/workgroup.hpp"
 #include "memory/allocation.hpp"
 
+class ThreadClosure;
 class ZTask;
 
 class ZWorkers {
--- old/src/hotspot/share/jfr/recorder/checkpoint/jfrCheckpointManager.cpp	2019-11-28 15:24:34.981455563 +0100
+++ new/src/hotspot/share/jfr/recorder/checkpoint/jfrCheckpointManager.cpp	2019-11-28 15:24:34.713446444 +0100
@@ -42,6 +42,7 @@
 #include "jfr/utilities/jfrTypes.hpp"
 #include "jfr/writers/jfrJavaEventWriter.hpp"
 #include "logging/log.hpp"
+#include "memory/iterator.hpp"
 #include "memory/resourceArea.hpp"
 #include "runtime/handles.inline.hpp"
 #include "runtime/mutex.hpp"
--- old/src/hotspot/share/jfr/recorder/checkpoint/types/jfrType.cpp	2019-11-28 15:24:36.167495921 +0100
+++ new/src/hotspot/share/jfr/recorder/checkpoint/types/jfrType.cpp	2019-11-28 15:24:35.899486801 +0100
@@ -39,6 +39,7 @@
 #include "jfr/support/jfrThreadLocal.hpp"
 #include "jfr/writers/jfrJavaEventWriter.hpp"
 #include "jfr/utilities/jfrThreadIterator.hpp"
+#include "memory/iterator.hpp"
 #include "memory/metaspaceGCThresholdUpdater.hpp"
 #include "memory/referenceType.hpp"
 #include "memory/universe.hpp"
--- old/src/hotspot/share/jfr/writers/jfrJavaEventWriter.cpp	2019-11-28 15:24:37.348536108 +0100
+++ new/src/hotspot/share/jfr/writers/jfrJavaEventWriter.cpp	2019-11-28 15:24:37.080526989 +0100
@@ -32,6 +32,7 @@
 #include "jfr/support/jfrThreadId.hpp"
 #include "jfr/utilities/jfrTypes.hpp"
 #include "jfr/writers/jfrJavaEventWriter.hpp"
+#include "memory/iterator.hpp"
 #include "oops/instanceKlass.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/fieldDescriptor.inline.hpp"
--- old/src/hotspot/share/prims/jvmtiEnvBase.cpp	2019-11-28 15:24:38.530576330 +0100
+++ new/src/hotspot/share/prims/jvmtiEnvBase.cpp	2019-11-28 15:24:38.262567210 +0100
@@ -27,6 +27,7 @@
 #include "classfile/moduleEntry.hpp"
 #include "classfile/systemDictionary.hpp"
 #include "jvmtifiles/jvmtiEnv.hpp"
+#include "memory/iterator.hpp"
 #include "memory/resourceArea.hpp"
 #include "oops/objArrayKlass.hpp"
 #include "oops/objArrayOop.hpp"
--- old/src/hotspot/share/runtime/thread.cpp	2019-11-28 15:24:39.732617232 +0100
+++ new/src/hotspot/share/runtime/thread.cpp	2019-11-28 15:24:39.461608010 +0100
@@ -47,6 +47,7 @@
 #include "logging/logConfiguration.hpp"
 #include "logging/logStream.hpp"
 #include "memory/allocation.inline.hpp"
+#include "memory/iterator.hpp"
 #include "memory/metaspaceShared.hpp"
 #include "memory/oopFactory.hpp"
 #include "memory/resourceArea.hpp"
--- old/src/hotspot/share/runtime/threadSMR.inline.hpp	2019-11-28 15:24:40.968659291 +0100
+++ new/src/hotspot/share/runtime/threadSMR.inline.hpp	2019-11-28 15:24:40.701650205 +0100
@@ -26,6 +26,7 @@
 #define SHARE_RUNTIME_THREADSMR_INLINE_HPP
 
 #include "runtime/atomic.hpp"
+#include "memory/iterator.hpp"
 #include "runtime/prefetch.inline.hpp"
 #include "runtime/thread.inline.hpp"
 #include "runtime/threadSMR.hpp"
--- old/src/hotspot/share/utilities/globalCounter.cpp	2019-11-28 15:24:42.145699342 +0100
+++ new/src/hotspot/share/utilities/globalCounter.cpp	2019-11-28 15:24:41.878690256 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -23,11 +23,12 @@
  */
 
 #include "precompiled.hpp"
-#include "utilities/globalCounter.hpp"
+#include "memory/iterator.hpp"
 #include "runtime/atomic.hpp"
 #include "runtime/thread.hpp"
 #include "runtime/threadSMR.inline.hpp"
 #include "runtime/vmThread.hpp"
+#include "utilities/globalCounter.hpp"
 #include "utilities/spinYield.hpp"
 
 GlobalCounter::PaddedCounter GlobalCounter::_global_counter;