1  /*
 2   * Copyright (C) 2014 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  #pragma once
27  
28  #include "TypeSet.h"
29  
30  namespace JSC {
31  
32  enum TypeProfilerGlobalIDFlags {
33      TypeProfilerNeedsUniqueIDGeneration = -1,
34      TypeProfilerNoGlobalIDExists = -2,
35      TypeProfilerReturnStatement = -3
36  };
37  
38  typedef intptr_t GlobalVariableID;
39  
40  class TypeLocation {
41  public:
42      TypeLocation()
43          : m_instructionTypeSet(TypeSet::create())
44          , m_globalTypeSet(nullptr)
45          , m_divotForFunctionOffsetIfReturnStatement(UINT_MAX)
46          , m_lastSeenType(TypeNothing)
47      {
48      }
49  
50      GlobalVariableID m_globalVariableID;
51      RefPtr<TypeSet> m_instructionTypeSet;
52      RefPtr<TypeSet> m_globalTypeSet;
53      intptr_t m_sourceID;
54      unsigned m_divotStart;
55      unsigned m_divotEnd;
56      unsigned m_divotForFunctionOffsetIfReturnStatement;
57      RuntimeType m_lastSeenType;
58  };
59  
60  } // namespace JSC