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ExitKind.h
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/*
* Copyright (C) 2012-2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
namespace JSC {
enum ExitKind : uint8_t {
ExitKindUnset,
BadType, // We exited because a type prediction was wrong.
BadConstantValue, // We exited because we made an incorrect assumption about what value we would see. Usually used for function checks.
BadIdent, // We exited because we made an incorrect assumption about what identifier we would see. Usually used for cached Id check in get_by_val.
BadExecutable, // We exited because we made an incorrect assumption about what executable we would see.
BadCache, // We exited because an inline cache was wrong.
BadConstantCache, // We exited because a cache on a weak constant (usually a prototype) was wrong.
BadIndexingType, // We exited because an indexing type was wrong.
BadTypeInfoFlags, // We exited because we made an incorrect assumption about what TypeInfo flags we would see.
Overflow, // We exited because of overflow.
NegativeZero, // We exited because we encountered negative zero.
NegativeIndex, // We exited because we encountered a negative index in a place we didn't want to see it.
Int52Overflow, // We exited because of an Int52 overflow.
StoreToHole, // We had a store to a hole.
LoadFromHole, // We had a load from a hole.
OutOfBounds, // We had an out-of-bounds access to an array.
InadequateCoverage, // We exited because we ended up in code that didn't have profiling coverage.
ArgumentsEscaped, // We exited because arguments escaped but we didn't expect them to.
ExoticObjectMode, // We exited because some exotic object that we were accessing was in an exotic mode (like Arguments with slow arguments).
VarargsOverflow, // We exited because a varargs call passed more arguments than we expected.
TDZFailure, // We exited because we were in the TDZ and accessed the variable.
HoistingFailed, // Something that was hoisted exited. So, assume that hoisting is a bad idea.
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.
UncountableInvalidation, // We exited because the code block was invalidated; this means that we've already counted the reasons why the code block was invalidated.
WatchdogTimerFired, // We exited because we need to service the watchdog timer.
DebuggerEvent, // We exited because we need to service the debugger.
ExceptionCheck, // We exited because a direct exception check showed that we threw an exception from a C call.
GenericUnwind, // We exited because we arrived at this OSR exit from genericUnwind.
BigInt32Overflow, // We exited because of an BigInt32 overflow.
};
const char* exitKindToString(ExitKind);
bool exitKindMayJettison(ExitKind);
} // namespace JSC
namespace WTF {
class PrintStream;
void printInternal(PrintStream&, JSC::ExitKind);
} // namespace WTF