8368966: Remove spurious VMStructs friends

src/hotspot/share/ci/ciObjectFactory.hpp

@@ -37,7 +37,6 @@
 // which ensures that for each oop, at most one ciObject is created.
 // This invariant allows efficient implementation of ciObject.
 class ciObjectFactory : public ArenaObj {
-  friend class VMStructs;
   friend class ciEnv;
 
 private:

src/hotspot/share/classfile/compactHashtable.hpp

@@ -254,7 +254,6 @@ template <
   bool (*EQUALS)(V value, K key, int len)
   >
 class CompactHashtable : public SimpleCompactHashtable {
-  friend class VMStructs;
 
   V decode(u4 encoded_value) const {
     return DECODE(_base_address, encoded_value);

src/hotspot/share/code/codeBlob.hpp

@@ -325,7 +325,6 @@ class CodeBlob {
 // RuntimeBlob: used for non-compiled method code (adapters, stubs, blobs)
 
 class RuntimeBlob : public CodeBlob {
-  friend class VMStructs;
  public:
 
   // Creation
@@ -634,7 +633,6 @@ class DeoptimizationBlob: public SingletonBlob {
 #ifdef COMPILER2
 
 class UncommonTrapBlob: public SingletonBlob {
-  friend class VMStructs;
  private:
   // Creation support
   UncommonTrapBlob(
@@ -658,7 +656,6 @@ class UncommonTrapBlob: public SingletonBlob {
 // ExceptionBlob: used for exception unwinding in compiled code (currently only used by Compiler 2)
 
 class ExceptionBlob: public SingletonBlob {
-  friend class VMStructs;
  private:
   // Creation support
   ExceptionBlob(
@@ -695,7 +692,6 @@ class ExceptionBlob: public SingletonBlob {
 // SafepointBlob: handles illegal_instruction exceptions during a safepoint
 
 class SafepointBlob: public SingletonBlob {
-  friend class VMStructs;
  private:
   // Creation support
   SafepointBlob(

src/hotspot/share/code/dependencyContext.hpp

@@ -42,7 +42,6 @@ class DepChange;
 // finding nmethods which might need to be deoptimized.
 //
 class nmethodBucket: public CHeapObj<mtClass> {
-  friend class VMStructs;
  private:
   nmethod*       _nmethod;
   nmethodBucket* volatile _next;
@@ -68,7 +67,6 @@ class nmethodBucket: public CHeapObj<mtClass> {
 // and uint64_t integer recording the safepoint counter at the last cleanup.
 //
 class DependencyContext : public StackObj {
-  friend class VMStructs;
   friend class TestDependencyContext;
  private:
   nmethodBucket* volatile* _dependency_context_addr;

src/hotspot/share/code/nmethod.hpp

@@ -90,7 +90,6 @@ class ExceptionCache : public CHeapObj<mtCode> {
 
 // cache pc descs found in earlier inquiries
 class PcDescCache {
-  friend class VMStructs;
  private:
   enum { cache_size = 4 };
   // The array elements MUST be volatile! Several threads may modify

src/hotspot/share/compiler/abstractCompiler.hpp

@@ -33,8 +33,6 @@ typedef void (*initializer)(void);
 
 // Per-compiler statistics
 class CompilerStatistics {
-  friend class VMStructs;
-
   class Data {
     friend class VMStructs;
   public:

src/hotspot/share/compiler/oopMap.hpp

@@ -479,7 +479,6 @@ class OopMapDo {
 // pointers are updated based on their base pointers new value and an offset.
 #if COMPILER2_OR_JVMCI
 class DerivedPointerTable : public AllStatic {
-  friend class VMStructs;
  private:
   class Entry;
   static bool _active;                                           // do not record pointers for verify pass etc.

src/hotspot/share/gc/epsilon/epsilonBarrierSet.hpp

@@ -30,8 +30,6 @@
 // No interaction with application is required for Epsilon, and therefore
 // the barrier set is empty.
 class EpsilonBarrierSet: public BarrierSet {
-  friend class VMStructs;
-
 public:
   EpsilonBarrierSet();
 

src/hotspot/share/gc/epsilon/epsilonMonitoringSupport.cpp

@@ -32,8 +32,6 @@
 #include "services/memoryService.hpp"
 
 class EpsilonSpaceCounters: public CHeapObj<mtGC> {
-  friend class VMStructs;
-
 private:
   PerfVariable* _capacity;
   PerfVariable* _used;

src/hotspot/share/gc/g1/g1Allocator.hpp

@@ -37,8 +37,6 @@ class G1NUMA;
 // some accessors (e.g. allocating into them, or getting their occupancy).
 // Also keeps track of retained regions across GCs.
 class G1Allocator : public CHeapObj<mtGC> {
-  friend class VMStructs;
-
 private:
   G1CollectedHeap* _g1h;
   G1NUMA* _numa;

src/hotspot/share/gc/g1/g1BarrierSet.hpp

@@ -62,7 +62,6 @@ class Thread;
 // cards.
 //
 class G1BarrierSet: public CardTableBarrierSet {
-  friend class VMStructs;
  private:
   BufferNode::Allocator _satb_mark_queue_buffer_allocator;
   G1SATBMarkQueueSet _satb_mark_queue_set;

src/hotspot/share/gc/g1/g1BlockOffsetTable.hpp

@@ -35,9 +35,7 @@
 // into "N"-word subregions (where "N" = 2^"LogN".  An array with an entry
 // for each such subregion indicates how far back one must go to find the
 // start of the chunk that includes the first word of the subregion.
-class G1BlockOffsetTable: public CHeapObj<mtGC> {
-  friend class VMStructs;
-
+class G1BlockOffsetTable : public CHeapObj<mtGC> {
 private:
   // The reserved region covered by the table.
   MemRegion _reserved;

src/hotspot/share/gc/g1/g1CardTable.hpp

@@ -45,7 +45,6 @@ class G1CardTableChangedListener : public G1MappingChangedListener {
 };
 
 class G1CardTable : public CardTable {
-  friend class VMStructs;
   friend class G1CardTableChangedListener;
 
   G1CardTableChangedListener _listener;

src/hotspot/share/gc/g1/g1ConcurrentMarkThread.hpp

@@ -33,8 +33,6 @@ class G1Policy;
 // The concurrent mark thread triggers the various steps of the concurrent marking
 // cycle, including various marking cleanup.
 class G1ConcurrentMarkThread: public ConcurrentGCThread {
-  friend class VMStructs;
-
   G1ConcurrentMark* _cm;
 
   enum ServiceState : uint {

src/hotspot/share/gc/g1/g1ConcurrentRefineThread.hpp

@@ -36,7 +36,6 @@ class G1ConcurrentRefine;
 // Concurrent refinement control thread watching card mark accrual on the card table
 // and starting refinement work.
 class G1ConcurrentRefineThread: public ConcurrentGCThread {
-  friend class VMStructs;
   friend class G1CollectedHeap;
 
   Monitor _notifier;

src/hotspot/share/gc/g1/g1HeapRegionRemSet.hpp

@@ -40,8 +40,6 @@ class G1CSetCandidateGroup;
 class outputStream;
 
 class G1HeapRegionRemSet : public CHeapObj<mtGC> {
-  friend class VMStructs;
-
   // A set of nmethods whose code contains pointers into
   // the region that owns this RSet.
   G1CodeRootSet _code_roots;

src/hotspot/share/gc/g1/g1PageBasedVirtualSpace.hpp

@@ -45,7 +45,6 @@ class WorkerThreads;
 // The implementation gives an error when trying to commit or uncommit pages that
 // have already been committed or uncommitted.
 class G1PageBasedVirtualSpace {
-  friend class VMStructs;
  private:
   // Reserved area addresses.
   char* _low_boundary;

src/hotspot/share/gc/parallel/mutableNUMASpace.hpp

@@ -60,8 +60,6 @@
  */
 
 class MutableNUMASpace : public MutableSpace {
-  friend class VMStructs;
-
   class LGRPSpace : public CHeapObj<mtGC> {
     uint _lgrp_id;
     MutableSpace* _space;

src/hotspot/share/gc/serial/cSpaceCounters.hpp

@@ -33,8 +33,6 @@
 // that track a space;
 
 class CSpaceCounters: public CHeapObj<mtGC> {
-  friend class VMStructs;
-
  private:
   PerfVariable*      _capacity;
   PerfVariable*      _used;

src/hotspot/share/gc/shared/collectorCounters.hpp

@@ -31,8 +31,6 @@
 // that track a collector
 
 class CollectorCounters: public CHeapObj<mtGC> {
-  friend class VMStructs;
-
   private:
     PerfCounter*      _invocations;
     PerfCounter*      _time;

src/hotspot/share/gc/shared/gcPolicyCounters.hpp

@@ -31,8 +31,6 @@
 // that track a generation
 
 class GCPolicyCounters: public CHeapObj<mtGC> {
-  friend class VMStructs;
-
   // Constant PerfData types don't need to retain a reference.
   // However, it's a good idea to document them here.
   // PerfStringConstant* _name;

src/hotspot/share/gc/shared/generationCounters.hpp

@@ -32,8 +32,6 @@
 // that track a generation
 
 class GenerationCounters: public CHeapObj<mtGC> {
-  friend class VMStructs;
-
   PerfVariable*      _current_size;
 
   // Constant PerfData types don't need to retain a reference.

src/hotspot/share/gc/shared/hSpaceCounters.hpp

@@ -33,8 +33,6 @@
 // that track a collections (logical spaces) in a heap;
 
 class HSpaceCounters: public CHeapObj<mtGC> {
-  friend class VMStructs;
-
  private:
   PerfVariable* _capacity;
   PerfVariable* _used;

src/hotspot/share/gc/shared/scavengableNMethods.hpp

@@ -33,8 +33,6 @@ class nmethod;
 class NMethodToOopClosure;
 
 class ScavengableNMethods : public AllStatic {
-  friend class VMStructs;
-
   static nmethod*           _head;
   static BoolObjectClosure* _is_scavengable;
 

src/hotspot/share/gc/shared/stringdedup/stringDedupThread.hpp

@@ -38,8 +38,6 @@
 // not an inner class of StringDedup.  This is because we need a simple public
 // identifier for use by VMStructs.
 class StringDedupThread : public JavaThread {
-  friend class VMStructs;
-
   StringDedupThread();
   ~StringDedupThread() = default;
 

src/hotspot/share/gc/shenandoah/shenandoahCardTable.hpp

@@ -33,8 +33,6 @@
 #define ShenandoahMinCardSizeInBytes 128
 
 class ShenandoahCardTable: public CardTable {
-  friend class VMStructs;
-
 private:
   // We maintain two copies of the card table to facilitate concurrent remembered set scanning
   // and concurrent clearing of stale remembered set information.  During the init_mark safepoint,

src/hotspot/share/gc/shenandoah/shenandoahControlThread.hpp

@@ -33,8 +33,6 @@
 #include "gc/shenandoah/shenandoahSharedVariables.hpp"
 
 class ShenandoahControlThread: public ShenandoahController {
-  friend class VMStructs;
-
 private:
   typedef enum {
     none,

src/hotspot/share/gc/shenandoah/shenandoahGenerationalControlThread.hpp

@@ -38,8 +38,6 @@ class ShenandoahGenerationalHeap;
 class ShenandoahHeap;
 
 class ShenandoahGenerationalControlThread: public ShenandoahController {
-  friend class VMStructs;
-
 public:
   typedef enum {
     none,

src/hotspot/share/gc/shenandoah/shenandoahRegulatorThread.hpp

@@ -45,8 +45,6 @@ class ShenandoahOldHeuristics;
  * sleep time.
  */
 class ShenandoahRegulatorThread: public ConcurrentGCThread {
-  friend class VMStructs;
-
  public:
   explicit ShenandoahRegulatorThread(ShenandoahGenerationalControlThread* control_thread);
 

src/hotspot/share/interpreter/templateInterpreter.hpp

@@ -84,7 +84,6 @@ class DispatchTable {
 };
 
 class TemplateInterpreter: public AbstractInterpreter {
-  friend class VMStructs;
   friend class InterpreterMacroAssembler;
   friend class TemplateInterpreterGenerator;
   friend class TemplateTable;

src/hotspot/share/interpreter/zero/bytecodeInterpreter.hpp

@@ -79,7 +79,6 @@ friend class AbstractInterpreterGenerator;
 friend class ZeroInterpreterGenerator;
 friend class InterpreterMacroAssembler;
 friend class frame;
-friend class VMStructs;
 
 public:
     enum messages {

src/hotspot/share/interpreter/zero/zeroInterpreter.hpp

@@ -36,7 +36,6 @@ class InterpreterCodelet;
 // of the c++ interpreter
 
 class ZeroInterpreter: public AbstractInterpreter {
-  friend class VMStructs;
  public:
   // Initialization/debugging
   static void       initialize_stub();

src/hotspot/share/memory/heap.hpp

@@ -70,7 +70,6 @@ class HeapBlock {
 };
 
 class FreeBlock: public HeapBlock {
-  friend class VMStructs;
  protected:
   FreeBlock* _link;
 

src/hotspot/share/memory/metaspaceCounters.cpp

@@ -32,7 +32,6 @@
 #include "utilities/exceptions.hpp"
 
 class MetaspacePerfCounters {
-  friend class VMStructs;
   PerfVariable*      _capacity;
   PerfVariable*      _used;
   PerfVariable*      _max_capacity;

src/hotspot/share/oops/instanceClassLoaderKlass.hpp

@@ -37,7 +37,6 @@ class ClassFileParser;
 // the list later?
 
 class InstanceClassLoaderKlass: public InstanceKlass {
-  friend class VMStructs;
   friend class InstanceKlass;
 public:
   static const KlassKind Kind = InstanceClassLoaderKlassKind;

src/hotspot/share/oops/instanceMirrorKlass.hpp

@@ -41,7 +41,6 @@ class ClassFileParser;
 
 
 class InstanceMirrorKlass: public InstanceKlass {
-  friend class VMStructs;
   friend class InstanceKlass;
 
  public:

src/hotspot/share/oops/instanceStackChunkKlass.hpp

@@ -100,7 +100,6 @@ Chunk layout:
 
 
 class InstanceStackChunkKlass: public InstanceKlass {
-  friend class VMStructs;
   friend class InstanceKlass;
   friend class Continuations;
 

src/hotspot/share/opto/matcher.hpp

@@ -43,8 +43,6 @@ class MachOper;
 
 //---------------------------Matcher-------------------------------------------
 class Matcher : public PhaseTransform {
-  friend class VMStructs;
-
 public:
 
   // Machine-dependent definitions

src/hotspot/share/opto/parse.hpp

@@ -41,8 +41,6 @@ class SwitchRange;
 
 //------------------------------InlineTree-------------------------------------
 class InlineTree : public AnyObj {
-  friend class VMStructs;
-
   Compile*    C;                  // cache
   JVMState*   _caller_jvms;       // state of caller
   ciMethod*   _method;            // method being called by the caller_jvms

src/hotspot/share/runtime/java.hpp

@@ -68,7 +68,6 @@ extern bool is_vm_statically_linked();
  * string prior to JDK 1.6 was removed (partial initialization)
  */
 class JDK_Version {
-  friend class VMStructs;
   friend class Universe;
   friend void JDK_Version_init();
  private:

src/hotspot/share/runtime/monitorDeflationThread.hpp

@@ -30,7 +30,6 @@
 // A hidden from external view JavaThread for deflating idle monitors.
 
 class MonitorDeflationThread : public JavaThread {
-  friend class VMStructs;
  private:
 
   static void monitor_deflation_thread_entry(JavaThread* thread, TRAPS);

src/hotspot/share/runtime/nonJavaThread.hpp

@@ -28,8 +28,6 @@
 #include "runtime/thread.hpp"
 
 class NonJavaThread: public Thread {
-  friend class VMStructs;
-
   NonJavaThread* volatile _next;
 
   class List;
@@ -103,7 +101,6 @@ class NamedThread: public NonJavaThread {
 
 // A single WatcherThread is used for simulating timer interrupts.
 class WatcherThread: public NonJavaThread {
-  friend class VMStructs;
  protected:
   virtual void run();