runtime/BasicBlockLocation.h

   1 /*
   2  * Copyright (C) 2014 Apple Inc. All rights reserved.
   3  * Copyright (C) 2014 Saam Barati. <saambarati1@gmail.com>
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  15  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  17  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  18  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  19  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  20  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  21  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  22  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #ifndef BasicBlockLocation_h
  28 #define BasicBlockLocation_h
  29
  30 #include "MacroAssembler.h"
  31 #include <wtf/RefCounted.h>
  32 #include <wtf/RefPtr.h>
  33 #include <wtf/Vector.h>
  34
  35 namespace JSC {
  36
  37 class CCallHelpers;
  38 class LLIntOffsetsExtractor;
  39
  40 class BasicBlockLocation {
  41 public:
  42     typedef std::pair<int, int> Gap;
  43
  44     BasicBlockLocation(int startOffset = -1, int endOffset = -1);
  45
  46     int startOffset() const { return m_startOffset; }
  47     int endOffset() const { return m_endOffset; }
  48     void setStartOffset(int startOffset) { m_startOffset = startOffset; }
  49     void setEndOffset(int endOffset) { m_endOffset = endOffset; }
  50     bool hasExecuted() const { return m_hasExecuted; }
  51     void insertGap(int, int);
  52     Vector<Gap> getExecutedRanges() const;
  53     JS_EXPORT_PRIVATE void dumpData() const;
  54 #if ENABLE(JIT)
  55     void emitExecuteCode(CCallHelpers&, MacroAssembler::RegisterID) const;
  56 #endif
  57
  58 private:
  59     friend class LLIntOffsetsExtractor;
  60
  61     int m_startOffset;
  62     int m_endOffset;
  63     bool m_hasExecuted;
  64     Vector<Gap> m_gaps;
  65 };
  66
  67 } // namespace JSC
  68
  69 #endif // BasicBlockLocation_h