text: /*
   * Copyright (C) 2012-2018 Apple Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
   */
  
  #pragma once
  
  #include "JITStubRoutine.h"
  #include <wtf/FastMalloc.h>
  #include <wtf/HashMap.h>
  #include <wtf/Vector.h>
  
  namespace JSC {
  
  class GCAwareJITStubRoutine;
  class SlotVisitor;
  
  #if ENABLE(JIT)
  
  class JITStubRoutineSet {
      WTF_MAKE_NONCOPYABLE(JITStubRoutineSet);
      WTF_MAKE_FAST_ALLOCATED;
      
  public:
      JITStubRoutineSet();
      ~JITStubRoutineSet();
      
      void add(GCAwareJITStubRoutine*);
  
      void clearMarks();
      
      void mark(void* candidateAddress)
      {
          uintptr_t address = removeCodePtrTag<uintptr_t>(candidateAddress);
          if (!JITStubRoutine::passesFilter(address))
              return;
          
          markSlow(address);
      }
      
      void deleteUnmarkedJettisonedStubRoutines();
      
      void traceMarkedStubRoutines(SlotVisitor&);
      
      unsigned size() const { return m_listOfRoutines.size(); }
      GCAwareJITStubRoutine* at(unsigned i) const { return m_listOfRoutines[i]; }
      
  private:
      void markSlow(uintptr_t address);
      
      HashMap<uintptr_t, GCAwareJITStubRoutine*> m_addressToRoutineMap;
      Vector<GCAwareJITStubRoutine*> m_listOfRoutines;
  };
  
  #else // !ENABLE(JIT)
  
  class JITStubRoutineSet {
      WTF_MAKE_NONCOPYABLE(JITStubRoutineSet);
      WTF_MAKE_FAST_ALLOCATED;
      
  public:
      JITStubRoutineSet() { }
      ~JITStubRoutineSet() { }
  
      void add(GCAwareJITStubRoutine*) { }
      void clearMarks() { }
      void mark(void*) { }
      void deleteUnmarkedJettisonedStubRoutines() { }
      void traceMarkedStubRoutines(SlotVisitor&) { }
  };
  
  #endif // !ENABLE(JIT)
  
  } // namespace JSC
  