1  /*
 2   * Copyright (C) 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  #include "DirectEvalExecutable.h"
28  
29  #include "CodeCache.h"
30  #include "Debugger.h"
31  #include "Error.h"
32  #include "JSCJSValueInlines.h"
33  #include "ParserError.h"
34  
35  namespace JSC {
36  
37  DirectEvalExecutable* DirectEvalExecutable::create(JSGlobalObject* globalObject, const SourceCode& source, DerivedContextType derivedContextType, NeedsClassFieldInitializer needsClassFieldInitializer, bool isArrowFunctionContext, bool isInsideOrdinaryFunction, EvalContextType evalContextType, const TDZEnvironment* variablesUnderTDZ, const VariableEnvironment* privateNames, ECMAMode ecmaMode)
38  {
39      VM& vm = globalObject->vm();
40      auto scope = DECLARE_THROW_SCOPE(vm);
41  
42      if (!globalObject->evalEnabled()) {
43          throwException(globalObject, scope, createEvalError(globalObject, globalObject->evalDisabledErrorMessage()));
44          return nullptr;
45      }
46  
47      auto* executable = new (NotNull, allocateCell<DirectEvalExecutable>(vm.heap)) DirectEvalExecutable(globalObject, source, ecmaMode.isStrict(), derivedContextType, needsClassFieldInitializer, isArrowFunctionContext, isInsideOrdinaryFunction, evalContextType);
48      executable->finishCreation(vm);
49  
50      ParserError error;
51      JSParserStrictMode strictMode = ecmaMode.isStrict() ? JSParserStrictMode::Strict : JSParserStrictMode::NotStrict;
52      OptionSet<CodeGenerationMode> codeGenerationMode = globalObject->defaultCodeGenerationMode();
53  
54      // We don't bother with CodeCache here because direct eval uses a specialized DirectEvalCodeCache.
55      UnlinkedEvalCodeBlock* unlinkedEvalCode = generateUnlinkedCodeBlockForDirectEval(vm, executable, executable->source(), strictMode, JSParserScriptMode::Classic, codeGenerationMode, error, evalContextType, variablesUnderTDZ, privateNames);
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_unlinkedEvalCodeBlock.set(vm, executable, unlinkedEvalCode);
66  
67      return executable;
68  }
69  
70  DirectEvalExecutable::DirectEvalExecutable(JSGlobalObject* globalObject, const SourceCode& source, bool inStrictContext, DerivedContextType derivedContextType, NeedsClassFieldInitializer needsClassFieldInitializer, bool isArrowFunctionContext, bool isInsideOrdinaryFunction, EvalContextType evalContextType)
71      : EvalExecutable(globalObject, source, inStrictContext, derivedContextType, isArrowFunctionContext, isInsideOrdinaryFunction, evalContextType, needsClassFieldInitializer)
72  {
73      ASSERT(needsClassFieldInitializer == NeedsClassFieldInitializer::No || derivedContextType == DerivedContextType::DerivedConstructorContext);
74  }
75  
76  } // namespace JSC