bytecode/ProfiledCodeBlockJettisoningWatchpoint.cpp

   1 /*
   2  * Copyright (C) 2013, 2014 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 "ProfiledCodeBlockJettisoningWatchpoint.h"
  28
  29 #if ENABLE(DFG_JIT)
  30
  31 #include "CodeBlock.h"
  32 #include "DFGCommon.h"
  33 #include "DFGExitProfile.h"
  34 #include "JSCInlines.h"
  35
  36 namespace JSC {
  37
  38 void ProfiledCodeBlockJettisoningWatchpoint::fireInternal()
  39 {
  40     if (DFG::shouldShowDisassembly()) {
  41         dataLog(
  42             "Firing profiled watchpoint ", RawPointer(this), " on ", *m_codeBlock, " due to ",
  43             m_exitKind, " at ", m_codeOrigin, "\n");
  44     }
  45
  46     // FIXME: Maybe this should call alternative().
  47     // https://bugs.webkit.org/show_bug.cgi?id=123677
  48     CodeBlock* machineBaselineCodeBlock = m_codeBlock->baselineAlternative();
  49     CodeBlock* sourceBaselineCodeBlock =
  50         baselineCodeBlockForOriginAndBaselineCodeBlock(
  51             m_codeOrigin, machineBaselineCodeBlock);
  52
  53     if (sourceBaselineCodeBlock) {
  54         sourceBaselineCodeBlock->addFrequentExitSite(
  55             DFG::FrequentExitSite(
  56                 m_codeOrigin.bytecodeIndex, m_exitKind,
  57                 exitingJITTypeFor(m_codeBlock->jitType())));
  58     }
  59
  60     m_codeBlock->jettison(Profiler::JettisonDueToProfiledWatchpoint, CountReoptimization);
  61
  62     if (isOnList())
  63         remove();
  64 }
  65
  66 } // namespace JSC
  67
  68 #endif // ENABLE(DFG_JIT)