1  /*
 2   * Copyright (C) 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  #pragma once
27  
28  #include "SourceCode.h"
29  #include <wtf/HashMap.h>
30  #include <wtf/Lock.h>
31  #include <wtf/text/WTFString.h>
32  
33  namespace JSC {
34  
35  class ScriptExecutable;
36  
37  struct FunctionOverrideInfo {
38      SourceCode sourceCode;
39      unsigned firstLine;
40      unsigned lineCount;
41      unsigned startColumn;
42      unsigned endColumn;
43      unsigned parametersStartOffset;
44      unsigned typeProfilingStartOffset;
45      unsigned typeProfilingEndOffset;
46  };
47  
48  class FunctionOverrides {
49  public:
50      using OverrideInfo = FunctionOverrideInfo;
51  
52      static FunctionOverrides& overrides();
53      FunctionOverrides(const char* functionOverridesFileName);
54  
55      static bool initializeOverrideFor(const SourceCode& origCode, OverrideInfo& result);
56  
57      JS_EXPORT_PRIVATE static void reinstallOverrides();
58  
59  private:
60      void parseOverridesInFile(const AbstractLocker&, const char* fileName);
61      void clear(const AbstractLocker&) { m_entries.clear(); }
62  
63      HashMap<String, String> m_entries;
64      Lock m_lock;
65  };
66  
67  } // namespace JSC