1  /*
 2   * Copyright (C) 2009, 2010, 2013, 2015-2016 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  #include "config.h"
27  
28  #include "CodeCache.h"
29  #include "Debugger.h"
30  
31  namespace JSC {
32  
33  const ClassInfo ModuleProgramExecutable::s_info = { "ModuleProgramExecutable", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(ModuleProgramExecutable) };
34  
35  ModuleProgramExecutable::ModuleProgramExecutable(JSGlobalObject* globalObject, const SourceCode& source)
36      : Base(globalObject->vm().moduleProgramExecutableStructure.get(), globalObject->vm(), source, false, DerivedContextType::None, false, false, EvalContextType::None, NoIntrinsic)
37  {
38      ASSERT(source.provider()->sourceType() == SourceProviderSourceType::Module);
39      VM& vm = globalObject->vm();
40      if (vm.typeProfiler() || vm.controlFlowProfiler())
41          vm.functionHasExecutedCache()->insertUnexecutedRange(sourceID(), typeProfilingStartOffset(vm), typeProfilingEndOffset(vm));
42  }
43  
44  ModuleProgramExecutable* ModuleProgramExecutable::create(JSGlobalObject* globalObject, const SourceCode& source)
45  {
46      VM& vm = globalObject->vm();
47      auto scope = DECLARE_THROW_SCOPE(vm);
48  
49      ModuleProgramExecutable* executable = new (NotNull, allocateCell<ModuleProgramExecutable>(vm.heap)) ModuleProgramExecutable(globalObject, source);
50      executable->finishCreation(globalObject->vm());
51  
52      ParserError error;
53      OptionSet<CodeGenerationMode> codeGenerationMode = globalObject->defaultCodeGenerationMode();
54      UnlinkedModuleProgramCodeBlock* unlinkedModuleProgramCode = vm.codeCache()->getUnlinkedModuleProgramCodeBlock(
55          vm, executable, executable->source(), codeGenerationMode, error);
56  
57      if (globalObject->hasDebugger())
58          globalObject->debugger()->sourceParsed(globalObject, executable->source().provider(), error.line(), error.message());
59  
60      if (error.isValid()) {
61          throwVMError(globalObject, scope, error.toErrorObject(globalObject, executable->source()));
62          return nullptr;
63      }
64  
65      executable->m_unlinkedModuleProgramCodeBlock.set(globalObject->vm(), executable, unlinkedModuleProgramCode);
66  
67      executable->m_moduleEnvironmentSymbolTable.set(globalObject->vm(), executable, jsCast<SymbolTable*>(unlinkedModuleProgramCode->constantRegister(VirtualRegister(unlinkedModuleProgramCode->moduleEnvironmentSymbolTableConstantRegisterOffset())).get())->cloneScopePart(globalObject->vm()));
68  
69      return executable;
70  }
71  
72  void ModuleProgramExecutable::destroy(JSCell* cell)
73  {
74      static_cast<ModuleProgramExecutable*>(cell)->ModuleProgramExecutable::~ModuleProgramExecutable();
75  }
76  
77  auto ModuleProgramExecutable::ensureTemplateObjectMap(VM&) -> TemplateObjectMap&
78  {
79      return ensureTemplateObjectMapImpl(m_templateObjectMap);
80  }
81  
82  void ModuleProgramExecutable::visitChildren(JSCell* cell, SlotVisitor& visitor)
83  {
84      ModuleProgramExecutable* thisObject = jsCast<ModuleProgramExecutable*>(cell);
85      ASSERT_GC_OBJECT_INHERITS(thisObject, info());
86      Base::visitChildren(thisObject, visitor);
87      visitor.append(thisObject->m_unlinkedModuleProgramCodeBlock);
88      visitor.append(thisObject->m_moduleEnvironmentSymbolTable);
89      visitor.append(thisObject->m_moduleProgramCodeBlock);
90      if (TemplateObjectMap* map = thisObject->m_templateObjectMap.get()) {
91          auto locker = holdLock(thisObject->cellLock());
92          for (auto& entry : *map)
93              visitor.append(entry.value);
94      }
95  }
96  
97  } // namespace JSC