bytecode/ExitKind.h

   1 /*
   2  * Copyright (C) 2012, 2013 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
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  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef ExitKind_h
  27 #define ExitKind_h
  28
  29 namespace JSC {
  30
  31 enum ExitKind {
  32     ExitKindUnset,
  33     BadType, // We exited because a type prediction was wrong.
  34     BadFunction, // We exited because we made an incorrect assumption about what function we would see.
  35     BadExecutable, // We exited because we made an incorrect assumption about what executable we would see.
  36     BadCache, // We exited because an inline cache was wrong.
  37     BadWeakConstantCache, // We exited because a cache on a weak constant (usually a prototype) was wrong.
  38     BadIndexingType, // We exited because an indexing type was wrong.
  39     Overflow, // We exited because of overflow.
  40     NegativeZero, // We exited because we encountered negative zero.
  41     StoreToHole, // We had a store to a hole.
  42     LoadFromHole, // We had a load from a hole.
  43     OutOfBounds, // We had an out-of-bounds access to an array.
  44     StoreToHoleOrOutOfBounds, // We're simultaneously speculating that we're in bounds and not accessing a hole, and one of those things didn't pan out.
  45     InadequateCoverage, // We exited because we ended up in code that didn't have profiling coverage.
  46     ArgumentsEscaped, // We exited because arguments escaped but we didn't expect them to.
  47     NotStringObject, // We exited because we shouldn't have attempted to optimize string object access.
  48     Uncountable, // We exited for none of the above reasons, and we should not count it. Most uses of this should be viewed as a FIXME.
  49     UncountableWatchpoint, // We exited because of a watchpoint, which isn't counted because watchpoints do tracking themselves.
  50     WatchdogTimerFired // We exited because we need to service the watchdog timer.
  51 };
  52
  53 const char* exitKindToString(ExitKind);
  54 bool exitKindIsCountable(ExitKind);
  55
  56 } // namespace JSC
  57
  58 namespace WTF {
  59
  60 class PrintStream;
  61 void printInternal(PrintStream&, JSC::ExitKind);
  62
  63 } // namespace WTF
  64
  65 #endif // ExitKind_h
  66