1  /*
 2   * Copyright (C) 2009-2019 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. ``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 "ExecutableToCodeBlockEdge.h"
29  #include "GlobalExecutable.h"
30  
31  namespace JSC {
32  
33  class ProgramExecutable final : public GlobalExecutable {
34      friend class LLIntOffsetsExtractor;
35  public:
36      using Base = GlobalExecutable;
37      static constexpr unsigned StructureFlags = Base::StructureFlags | StructureIsImmortal;
38  
39      template<typename CellType, SubspaceAccess>
40      static IsoSubspace* subspaceFor(VM& vm)
41      {
42          return &vm.programExecutableSpace.space;
43      }
44  
45      static ProgramExecutable* create(JSGlobalObject* globalObject, const SourceCode& source)
46      {
47          VM& vm = getVM(globalObject);
48          ProgramExecutable* executable = new (NotNull, allocateCell<ProgramExecutable>(vm.heap)) ProgramExecutable(globalObject, source);
49          executable->finishCreation(vm);
50          return executable;
51      }
52  
53      JSObject* initializeGlobalProperties(VM&, JSGlobalObject*, JSScope*);
54  
55      static void destroy(JSCell*);
56  
57      ProgramCodeBlock* codeBlock()
58      {
59          return bitwise_cast<ProgramCodeBlock*>(ExecutableToCodeBlockEdge::unwrap(m_programCodeBlock.get()));
60      }
61  
62      Ref<JITCode> generatedJITCode()
63      {
64          return generatedJITCodeForCall();
65      }
66          
67      static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto)
68      {
69          return Structure::create(vm, globalObject, proto, TypeInfo(ProgramExecutableType, StructureFlags), info());
70      }
71          
72      DECLARE_INFO;
73  
74      ExecutableInfo executableInfo() const { return ExecutableInfo(usesEval(), false, false, ConstructorKind::None, JSParserScriptMode::Classic, SuperBinding::NotNeeded, SourceParseMode::ProgramMode, derivedContextType(), NeedsClassFieldInitializer::No, isArrowFunctionContext(), false, EvalContextType::None); }
75  
76      TemplateObjectMap& ensureTemplateObjectMap(VM&);
77  
78  private:
79      friend class ExecutableBase;
80      friend class ScriptExecutable;
81  
82      ProgramExecutable(JSGlobalObject*, const SourceCode&);
83  
84      static void visitChildren(JSCell*, SlotVisitor&);
85  
86      WriteBarrier<UnlinkedProgramCodeBlock> m_unlinkedProgramCodeBlock;
87      WriteBarrier<ExecutableToCodeBlockEdge> m_programCodeBlock;
88      std::unique_ptr<TemplateObjectMap> m_templateObjectMap;
89  };
90  
91  } // namespace JSC