heap/JITStubRoutineSet.h

   1 /*
   2  * Copyright (C) 2012 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef JITStubRoutineSet_h
  27 #define JITStubRoutineSet_h
  28
  29 #include "JITStubRoutine.h"
  30 #include <wtf/FastMalloc.h>
  31 #include <wtf/HashMap.h>
  32 #include <wtf/Vector.h>
  33
  34 namespace JSC {
  35
  36 class GCAwareJITStubRoutine;
  37 class SlotVisitor;
  38
  39 #if ENABLE(JIT)
  40
  41 class JITStubRoutineSet {
  42     WTF_MAKE_NONCOPYABLE(JITStubRoutineSet);
  43     WTF_MAKE_FAST_ALLOCATED;
  44
  45 public:
  46     JITStubRoutineSet();
  47     ~JITStubRoutineSet();
  48
  49     void add(GCAwareJITStubRoutine*);
  50
  51     void clearMarks();
  52
  53     void mark(void* candidateAddress)
  54     {
  55         uintptr_t address = reinterpret_cast<uintptr_t>(candidateAddress);
  56         if (!JITStubRoutine::passesFilter(address))
  57             return;
  58
  59         markSlow(address);
  60     }
  61
  62     void deleteUnmarkedJettisonedStubRoutines();
  63
  64     void traceMarkedStubRoutines(SlotVisitor&);
  65
  66     unsigned size() const { return m_listOfRoutines.size(); }
  67     GCAwareJITStubRoutine* at(unsigned i) const { return m_listOfRoutines[i]; }
  68
  69 private:
  70     void markSlow(uintptr_t address);
  71
  72     HashMap<uintptr_t, GCAwareJITStubRoutine*> m_addressToRoutineMap;
  73     Vector<GCAwareJITStubRoutine*> m_listOfRoutines;
  74 };
  75
  76 #else // !ENABLE(JIT)
  77
  78 class JITStubRoutineSet {
  79     WTF_MAKE_NONCOPYABLE(JITStubRoutineSet);
  80     WTF_MAKE_FAST_ALLOCATED;
  81
  82 public:
  83     JITStubRoutineSet() { }
  84     ~JITStubRoutineSet() { }
  85
  86     void add(GCAwareJITStubRoutine*) { }
  87     void clearMarks() { }
  88     void mark(void*) { }
  89     void deleteUnmarkedJettisonedStubRoutines() { }
  90     void traceMarkedStubRoutines(SlotVisitor&) { }
  91 };
  92
  93 #endif // !ENABLE(JIT)
  94
  95 } // namespace JSC
  96
  97 #endif // JITStubRoutineSet_h
  98