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 ModuleProgramExecutable 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 mode>
40      static IsoSubspace* subspaceFor(VM& vm)
41      {
42          return vm.moduleProgramExecutableSpace<mode>();
43      }
44  
45      static ModuleProgramExecutable* create(JSGlobalObject*, const SourceCode&);
46  
47      static void destroy(JSCell*);
48  
49      ModuleProgramCodeBlock* codeBlock()
50      {
51          return bitwise_cast<ModuleProgramCodeBlock*>(ExecutableToCodeBlockEdge::unwrap(m_moduleProgramCodeBlock.get()));
52      }
53  
54      Ref<JITCode> generatedJITCode()
55      {
56          return generatedJITCodeForCall();
57      }
58  
59      static Structure* createStructure(VM& vm, JSGlobalObject* globalObject, JSValue proto)
60      {
61          return Structure::create(vm, globalObject, proto, TypeInfo(ModuleProgramExecutableType, StructureFlags), info());
62      }
63  
64      DECLARE_INFO;
65  
66      ExecutableInfo executableInfo() const { return ExecutableInfo(usesEval(), false, false, ConstructorKind::None, JSParserScriptMode::Module, SuperBinding::NotNeeded, SourceParseMode::ModuleEvaluateMode, derivedContextType(), NeedsClassFieldInitializer::No, isArrowFunctionContext(), false, EvalContextType::None); }
67  
68      UnlinkedModuleProgramCodeBlock* unlinkedModuleProgramCodeBlock() { return m_unlinkedModuleProgramCodeBlock.get(); }
69  
70      SymbolTable* moduleEnvironmentSymbolTable() { return m_moduleEnvironmentSymbolTable.get(); }
71  
72      TemplateObjectMap& ensureTemplateObjectMap(VM&);
73  
74  private:
75      friend class ExecutableBase;
76      friend class ScriptExecutable;
77  
78      ModuleProgramExecutable(JSGlobalObject*, const SourceCode&);
79  
80      static void visitChildren(JSCell*, SlotVisitor&);
81  
82      WriteBarrier<UnlinkedModuleProgramCodeBlock> m_unlinkedModuleProgramCodeBlock;
83      WriteBarrier<SymbolTable> m_moduleEnvironmentSymbolTable;
84      WriteBarrier<ExecutableToCodeBlockEdge> m_moduleProgramCodeBlock;
85      std::unique_ptr<TemplateObjectMap> m_templateObjectMap;
86  };
87  
88  } // namespace JSC