1  /*
 2   * Copyright (C) 2016-2019 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. AND ITS CONTRIBUTORS ``AS IS''
14   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15   * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16   * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23   * THE POSSIBILITY OF SUCH DAMAGE.
24   */
25  
26  #include "config.h"
27  #include "LazyClassStructure.h"
28  
29  #include "JSCInlines.h"
30  #include "LazyPropertyInlines.h"
31  
32  namespace JSC {
33  
34  LazyClassStructure::Initializer::Initializer(VM& vm, JSGlobalObject* global, LazyClassStructure& classStructure, const StructureInitializer& structureInit)
35      : vm(vm)
36      , global(global)
37      , classStructure(classStructure)
38      , structureInit(structureInit)
39  {
40  }
41  
42  void LazyClassStructure::Initializer::setPrototype(JSObject* prototype)
43  {
44      RELEASE_ASSERT(!this->prototype);
45      RELEASE_ASSERT(!structure);
46      RELEASE_ASSERT(!constructor);
47      
48      this->prototype = prototype;
49  }
50  
51  void LazyClassStructure::Initializer::setStructure(Structure* structure)
52  {
53      RELEASE_ASSERT(!this->structure);
54      RELEASE_ASSERT(!constructor);
55  
56      this->structure = structure;
57      structureInit.set(structure);
58      
59      if (!prototype)
60          prototype = structure->storedPrototypeObject();
61  }
62  
63  void LazyClassStructure::Initializer::setConstructor(JSObject* constructor)
64  {
65      RELEASE_ASSERT(structure);
66      RELEASE_ASSERT(prototype);
67      RELEASE_ASSERT(!this->constructor);
68      
69      this->constructor = constructor;
70  
71      prototype->putDirectWithoutTransition(vm, vm.propertyNames->constructor, constructor, static_cast<unsigned>(PropertyAttribute::DontEnum));
72      classStructure.m_constructor.set(vm, global, constructor);
73  }
74  
75  void LazyClassStructure::visit(SlotVisitor& visitor)
76  {
77      m_structure.visit(visitor);
78      visitor.append(m_constructor);
79  }
80  
81  void LazyClassStructure::dump(PrintStream& out) const
82  {
83      out.print("<structure = ", m_structure, ", constructor = ", RawPointer(m_constructor.get()), ">");
84  }
85  
86  } // namespace JSC
87