webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 15 insertions, 26 deletions

diff --git a/Source/JavaScriptCore/bytecode/ExitKind.h b/Source/JavaScriptCore/bytecode/ExitKind.h
index a9f6df6d4..a6c2e0ea2 100644
--- a/Source/JavaScriptCore/bytecode/ExitKind.h
+++ b/Source/JavaScriptCore/bytecode/ExitKind.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012, 2013, 2014 Apple Inc. All rights reserved.
+ * 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
@@ -23,21 +23,20 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
  */
 
-#ifndef ExitKind_h
-#define ExitKind_h
+#pragma once
 
 namespace JSC {
 
-enum ExitKind {
+enum ExitKind : uint8_t {
     ExitKindUnset,
     BadType, // We exited because a type prediction was wrong.
-    BadFunction, // We exited because we made an incorrect assumption about what function we would see.
+    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.
-    BadWeakConstantCache, // We exited because a cache on a weak constant (usually a prototype) was wrong.
-    BadCacheWatchpoint, // Same as BadCache but from a watchpoint.
-    BadWeakConstantCacheWatchpoint, // Same as BadWeakConstantCache but from a watchpoint.
+    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.
@@ -46,28 +45,21 @@ enum ExitKind {
     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.
-    UncountableWatchpoint, // We exited because of a watchpoint, which isn't counted because watchpoints do tracking themselves.
     WatchdogTimerFired, // We exited because we need to service the watchdog timer.
-    DebuggerEvent // We exited because we need to service the debugger.
+    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 exitKindIsCountable(ExitKind);
-
-inline bool isWatchpoint(ExitKind kind)
-{
-    switch (kind) {
-    case BadCacheWatchpoint:
-    case BadWeakConstantCacheWatchpoint:
-    case UncountableWatchpoint:
-        return true;
-    default:
-        return false;
-    }
-}
+bool exitKindMayJettison(ExitKind);
 
 } // namespace JSC
 
@@ -77,6 +69,3 @@ class PrintStream;
 void printInternal(PrintStream&, JSC::ExitKind);
 
 } // namespace WTF
-
-#endif // ExitKind_h
-