jit/JITThunks.h

   1 /*
   2  * Copyright (C) 2012, 2013 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 JITThunks_h
  27 #define JITThunks_h
  28
  29 #if ENABLE(JIT)
  30
  31 #include "CallData.h"
  32 #include "Intrinsic.h"
  33 #include "LowLevelInterpreter.h"
  34 #include "MacroAssemblerCodeRef.h"
  35 #include "ThunkGenerator.h"
  36 #include "Weak.h"
  37 #include "WeakInlines.h"
  38 #include <wtf/HashMap.h>
  39 #include <wtf/OwnPtr.h>
  40 #include <wtf/RefPtr.h>
  41 #include <wtf/ThreadingPrimitives.h>
  42
  43 namespace JSC {
  44
  45 class VM;
  46 class NativeExecutable;
  47
  48 class JITThunks {
  49 public:
  50     JITThunks();
  51     ~JITThunks();
  52
  53     MacroAssemblerCodePtr ctiNativeCall(VM*);
  54     MacroAssemblerCodePtr ctiNativeConstruct(VM*);
  55     MacroAssemblerCodePtr ctiNativeTailCall(VM*);
  56
  57     MacroAssemblerCodeRef ctiStub(VM*, ThunkGenerator);
  58
  59     NativeExecutable* hostFunctionStub(VM*, NativeFunction, NativeFunction constructor);
  60     NativeExecutable* hostFunctionStub(VM*, NativeFunction, ThunkGenerator, Intrinsic);
  61
  62     void clearHostFunctionStubs();
  63
  64 private:
  65     // Main thread can hold this lock for a while, so use an adaptive mutex.
  66     typedef Mutex Lock;
  67     typedef MutexLocker Locker;
  68
  69     typedef HashMap<ThunkGenerator, MacroAssemblerCodeRef> CTIStubMap;
  70     CTIStubMap m_ctiStubMap;
  71     typedef HashMap<std::pair<NativeFunction, NativeFunction>, Weak<NativeExecutable>> HostFunctionStubMap;
  72     OwnPtr<HostFunctionStubMap> m_hostFunctionStubMap;
  73     Lock m_lock;
  74 };
  75
  76 } // namespace JSC
  77
  78 #endif // ENABLE(JIT)
  79
  80 #endif // JITThunks_h
  81