src/share/vm/memory/sharedHeap.hpp

@@ -59,22 +59,22 @@
 //    2) SubTasksDone has a variable _n_threads that is used in
 //    all_tasks_completed() to determine completion.  all_tasks_complete()
 //    counts the number of tasks that have been done and then reset
 //    the SubTasksDone so that it can be used again.  When the number of
 //    tasks is set to the number of GC workers, then _n_threads must
-//    be set to the number of active GC workers. G1CollectedHeap,
-//    HRInto_G1RemSet, GenCollectedHeap and SharedHeap have SubTasksDone.
-//    This seems too many.
+//    be set to the number of active GC workers. G1RootProcessor and
+//    GenCollectedHeap have SubTasksDone.
 //    3) SequentialSubTasksDone has an _n_threads that is used in
 //    a way similar to SubTasksDone and has the same dependency on the
 //    number of active GC workers.  CompactibleFreeListSpace and Space
 //    have SequentialSubTasksDone's.
-// Example of using SubTasksDone and SequentialSubTasksDone
-// G1CollectedHeap::g1_process_roots()
-//  to SharedHeap::process_roots() and uses
-//  SubTasksDone* _process_strong_tasks to claim tasks.
-//  process_roots() calls
+//
+// Examples of using SubTasksDone and SequentialSubTasksDone:
+//  G1RootProcessor and GenCollectedHeap::process_roots() use
+//  SubTasksDone* _process_strong_tasks to claim tasks for workers
+//
+//  GenCollectedHeap::gen_process_roots() calls
 //      rem_set()->younger_refs_iterate()
 //  to scan the card table and which eventually calls down into
 //  CardTableModRefBS::par_non_clean_card_iterate_work().  This method
 //  uses SequentialSubTasksDone* _pst to claim tasks.
 //  Both SubTasksDone and SequentialSubTasksDone call their method

@@ -102,14 +102,10 @@
   friend class VMStructs;
 
   friend class VM_GC_Operation;
   friend class VM_CGC_Operation;
 
-private:
-  // For claiming strong_roots tasks.
-  SubTasksDone* _process_strong_tasks;
-
 protected:
   // There should be only a single instance of "SharedHeap" in a program.
   // This is enforced with the protected constructor below, which will also
   // set the static pointer "_sh" to that instance.
   static SharedHeap* _sh;

@@ -142,11 +138,10 @@
 
 public:
   static SharedHeap* heap() { return _sh; }
 
   void set_barrier_set(BarrierSet* bs);
-  SubTasksDone* process_strong_tasks() { return _process_strong_tasks; }
 
   // Does operations required after initialization has been done.
   virtual void post_initialize();
 
   // Initialization of ("weak") reference processing support

@@ -199,73 +194,23 @@
 
   // Call these in sequential code around process_roots.
   // strong_roots_prologue calls change_strong_roots_parity, if
   // parallel tasks are enabled.
   class StrongRootsScope : public MarkingCodeBlobClosure::MarkScope {
-    // Used to implement the Thread work barrier.
-    static Monitor* _lock;
-
     SharedHeap*   _sh;
-    volatile jint _n_workers_done_with_threads;
 
    public:
     StrongRootsScope(SharedHeap* heap, bool activate = true);
-    ~StrongRootsScope();
-
-    // Mark that this thread is done with the Threads work.
-    void mark_worker_done_with_threads(uint n_workers);
-    // Wait until all n_workers are done with the Threads work.
-    void wait_until_all_workers_done_with_threads(uint n_workers);
   };
   friend class StrongRootsScope;
 
-  // The current active StrongRootScope
-  StrongRootsScope* _strong_roots_scope;
-
-  StrongRootsScope* active_strong_roots_scope() const;
-
  private:
-  void register_strong_roots_scope(StrongRootsScope* scope);
-  void unregister_strong_roots_scope(StrongRootsScope* scope);
   void change_strong_roots_parity();
 
  public:
-  enum ScanningOption {
-    SO_None                =  0x0,
-    SO_AllCodeCache        =  0x8,
-    SO_ScavengeCodeCache   = 0x10
-  };
-
   FlexibleWorkGang* workers() const { return _workers; }
 
-  // Invoke the "do_oop" method the closure "roots" on all root locations.
-  // The "so" argument determines which roots the closure is applied to:
-  // "SO_None" does none;
-  // "SO_AllCodeCache" applies the closure to all elements of the CodeCache.
-  // "SO_ScavengeCodeCache" applies the closure to elements on the scavenge root list in the CodeCache.
-  void process_roots(bool activate_scope,
-                     ScanningOption so,
-                     OopClosure* strong_roots,
-                     OopClosure* weak_roots,
-                     CLDClosure* strong_cld_closure,
-                     CLDClosure* weak_cld_closure,
-                     CodeBlobClosure* code_roots);
-  void process_all_roots(bool activate_scope,
-                         ScanningOption so,
-                         OopClosure* roots,
-                         CLDClosure* cld_closure,
-                         CodeBlobClosure* code_roots);
-  void process_strong_roots(bool activate_scope,
-                            ScanningOption so,
-                            OopClosure* roots,
-                            CLDClosure* cld_closure,
-                            CodeBlobClosure* code_roots);
-
-
-  // Apply "root_closure" to the JNI weak roots..
-  void process_weak_roots(OopClosure* root_closure);
-
   // The functions below are helper functions that a subclass of
   // "SharedHeap" can use in the implementation of its virtual
   // functions.
 
 public:

@@ -276,13 +221,10 @@
 
   // Sets the number of parallel threads that will be doing tasks
   // (such as process roots) subsequently.
   virtual void set_par_threads(uint t);
 
-  int n_termination();
-  void set_n_termination(int t);
-
   //
   // New methods from CollectedHeap
   //
 
   // Some utilities.

@@ -290,10 +232,6 @@
                              size_t bytes_before,
                              size_t bytes_after,
                              size_t capacity);
 };
 
-inline SharedHeap::ScanningOption operator|(SharedHeap::ScanningOption so0, SharedHeap::ScanningOption so1) {
-  return static_cast<SharedHeap::ScanningOption>(static_cast<int>(so0) | static_cast<int>(so1));
-}
-
 #endif // SHARE_VM_MEMORY_SHAREDHEAP_HPP