ftl/FTLJITCode.h

   1 /*
   2  * Copyright (C) 2013, 2015 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 FTLJITCode_h
  27 #define FTLJITCode_h
  28
  29 #if ENABLE(FTL_JIT)
  30
  31 #include "DFGCommonData.h"
  32 #include "FTLDataSection.h"
  33 #include "FTLOSRExit.h"
  34 #include "FTLStackMaps.h"
  35 #include "FTLUnwindInfo.h"
  36 #include "JITCode.h"
  37 #include "LLVMAPI.h"
  38 #include <wtf/RefCountedArray.h>
  39
  40 #if OS(DARWIN)
  41 #define SECTION_NAME_PREFIX "__"
  42 #elif OS(LINUX)
  43 #define SECTION_NAME_PREFIX "."
  44 #else
  45 #error "Unsupported platform"
  46 #endif
  47
  48 #define SECTION_NAME(NAME) (SECTION_NAME_PREFIX NAME)
  49
  50 namespace JSC {
  51
  52 class TrackedReferences;
  53
  54 namespace FTL {
  55
  56 class JITCode : public JSC::JITCode {
  57 public:
  58     JITCode();
  59     ~JITCode();
  60
  61     CodePtr addressForCall(VM&, ExecutableBase*, ArityCheckMode, RegisterPreservationMode) override;
  62     void* executableAddressAtOffset(size_t offset) override;
  63     void* dataAddressAtOffset(size_t offset) override;
  64     unsigned offsetOf(void* pointerIntoCode) override;
  65     size_t size() override;
  66     bool contains(void*) override;
  67
  68     void initializeExitThunks(CodeRef);
  69     void addHandle(PassRefPtr<ExecutableMemoryHandle>);
  70     void addDataSection(PassRefPtr<DataSection>);
  71     void initializeArityCheckEntrypoint(CodeRef);
  72     void initializeAddressForCall(CodePtr);
  73
  74     void validateReferences(const TrackedReferences&) override;
  75
  76     const Vector<RefPtr<ExecutableMemoryHandle>>& handles() const { return m_handles; }
  77     const Vector<RefPtr<DataSection>>& dataSections() const { return m_dataSections; }
  78
  79     CodePtr exitThunks();
  80
  81     JITCode* ftl() override;
  82     DFG::CommonData* dfgCommon() override;
  83
  84     DFG::CommonData common;
  85     SegmentedVector<OSRExit, 8> osrExit;
  86     StackMaps stackmaps;
  87     UnwindInfo unwindInfo;
  88
  89 private:
  90     Vector<RefPtr<DataSection>> m_dataSections;
  91     Vector<RefPtr<ExecutableMemoryHandle>> m_handles;
  92     CodePtr m_addressForCall;
  93     CodeRef m_arityCheckEntrypoint;
  94     CodeRef m_exitThunks;
  95 };
  96
  97 } } // namespace JSC::FTL
  98
  99 #endif // ENABLE(FLT_JIT)
 100
 101 #endif // FTLJITCode_h
 102