1  /*
 2   * Copyright (C) 2018 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 "ICStatusUtils.h"
28  
29  #include "CodeBlock.h"
30  #include "ExitFlag.h"
31  #include "UnlinkedCodeBlock.h"
32  
33  namespace JSC {
34  
35  ExitFlag hasBadCacheExitSite(CodeBlock* profiledBlock, BytecodeIndex bytecodeIndex)
36  {
37  #if ENABLE(DFG_JIT)
38      UnlinkedCodeBlock* unlinkedCodeBlock = profiledBlock->unlinkedCodeBlock();
39      ConcurrentJSLocker locker(unlinkedCodeBlock->m_lock);
40      auto exitFlag = [&] (ExitKind exitKind) -> ExitFlag {
41          auto withInlined = [&] (ExitingInlineKind inlineKind) -> ExitFlag {
42              return ExitFlag(unlinkedCodeBlock->hasExitSite(locker, DFG::FrequentExitSite(bytecodeIndex, exitKind, ExitFromAnything, inlineKind)), inlineKind);
43          };
44          return withInlined(ExitFromNotInlined) | withInlined(ExitFromInlined);
45      };
46      return exitFlag(BadCache) | exitFlag(BadConstantCache) | exitFlag(BadType);
47  #else
48      UNUSED_PARAM(profiledBlock);
49      UNUSED_PARAM(bytecodeIndex);
50      return ExitFlag();
51  #endif
52  }
53  
54  } // namespace JSC
55