| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| #pragma once |
| |
| namespace JSC { |
| |
| enum ExitKind : uint8_t { |
| ExitKindUnset, |
| BadType, // We exited because a type prediction was wrong. |
| BadCell, // We exited because we made an incorrect assumption about what cell 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. |
| 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). |
| NotStringObject, // We exited because we shouldn't have attempted to optimize string object access. |
| 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 a we arrived at this OSR exit from genericUnwind. |
| }; |
| |
| const char* exitKindToString(ExitKind); |
| bool exitKindMayJettison(ExitKind); |
| |
| } // namespace JSC |
| |
| namespace WTF { |
| |
| class PrintStream; |
| void printInternal(PrintStream&, JSC::ExitKind); |
| |
| } // namespace WTF |