1/*
2 * Copyright (C) 2012, 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#ifndef ExitKind_h
27#define ExitKind_h
28
29namespace JSC {
30
31enum ExitKind : uint8_t {
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    BadCacheWatchpoint, // Same as BadCache but from a watchpoint.
39    BadWeakConstantCacheWatchpoint, // Same as BadWeakConstantCache but from a watchpoint.
40    BadIndexingType, // We exited because an indexing type was wrong.
41    Overflow, // We exited because of overflow.
42    NegativeZero, // We exited because we encountered negative zero.
43    Int52Overflow, // We exited because of an Int52 overflow.
44    StoreToHole, // We had a store to a hole.
45    LoadFromHole, // We had a load from a hole.
46    OutOfBounds, // We had an out-of-bounds access to an array.
47    InadequateCoverage, // We exited because we ended up in code that didn't have profiling coverage.
48    ArgumentsEscaped, // We exited because arguments escaped but we didn't expect them to.
49    NotStringObject, // We exited because we shouldn't have attempted to optimize string object access.
50    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.
51    UncountableInvalidation, // We exited because the code block was invalidated; this means that we've already counted the reasons why the code block was invalidated.
52    UncountableWatchpoint, // We exited because of a watchpoint, which isn't counted because watchpoints do tracking themselves.
53    WatchdogTimerFired, // We exited because we need to service the watchdog timer.
54    DebuggerEvent // We exited because we need to service the debugger.
55};
56
57const char* exitKindToString(ExitKind);
58bool exitKindIsCountable(ExitKind);
59
60inline bool isWatchpoint(ExitKind kind)
61{
62    switch (kind) {
63    case BadCacheWatchpoint:
64    case BadWeakConstantCacheWatchpoint:
65    case UncountableWatchpoint:
66        return true;
67    default:
68        return false;
69    }
70}
71
72} // namespace JSC
73
74namespace WTF {
75
76class PrintStream;
77void printInternal(PrintStream&, JSC::ExitKind);
78
79} // namespace WTF
80
81#endif // ExitKind_h
82
83