%X => %_X, %_X => %__X

test/mjsunit/fuzz-natives-part1.js

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * 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
@@ skipping 97 matching lines @@
     try {
       func.apply(void 0, argList);
     } catch (e) {
       // we don't care what happens as long as we don't crash
     }
     type++;
   }
 }
 
 var knownProblems = {
-  "Abort": true,
+  "_Abort": true,
 
   // Avoid calling the concat operation, because weird lengths
   // may lead to out-of-memory.  Ditto for StringBuilderJoin.
-  "StringBuilderConcat": true,
-  "StringBuilderJoin": true,
+  "_StringBuilderConcat": true,
+  "_StringBuilderJoin": true,
 
   // These functions use pseudo-stack-pointers and are not robust
   // to unexpected integer values.
-  "DebugEvaluate": true,
+  "_DebugEvaluate": true,
 
   // These functions do nontrivial error checking in recursive calls,
   // which means that we have to propagate errors back.
-  "SetFunctionBreakPoint": true,
-  "SetScriptBreakPoint": true,
-  "PrepareStep": true,
+  "_SetFunctionBreakPoint": true,
+  "_SetScriptBreakPoint": true,
+  "_PrepareStep": true,
 
   // Too slow.
-  "DebugReferencedBy": true,
+  "_DebugReferencedBy": true,
 
   // Calling disable/enable access checks may interfere with the
   // the rest of the tests.
-  "DisableAccessChecks": true,
-  "EnableAccessChecks": true,
+  "_DisableAccessChecks": true,
+  "_EnableAccessChecks": true,
 
   // These functions should not be callable as runtime functions.
-  "NewFunctionContext": true,
-  "NewArgumentsFast": true,
-  "NewStrictArgumentsFast": true,
-  "PushWithContext": true,
-  "PushCatchContext": true,
-  "PushBlockContext": true,
-  "PushModuleContext": true,
-  "LazyCompile": true,
-  "LazyRecompile": true,
-  "ParallelRecompile": true,
-  "NotifyDeoptimized": true,
-  "NotifyStubFailure": true,
-  "NotifyOSR": true,
-  "CreateObjectLiteralBoilerplate": true,
-  "CloneLiteralBoilerplate": true,
-  "CloneShallowLiteralBoilerplate": true,
-  "CreateArrayLiteralBoilerplate": true,
-  "IS_VAR": true,
-  "ResolvePossiblyDirectEval": true,
-  "Log": true,
-  "DeclareGlobals": true,
+  "_NewFunctionContext": true,
+  "_NewArgumentsFast": true,
+  "_NewStrictArgumentsFast": true,
+  "_PushWithContext": true,
+  "_PushCatchContext": true,
+  "_PushBlockContext": true,
+  "_PushModuleContext": true,
+  "_LazyCompile": true,
+  "_LazyRecompile": true,
+  "_ParallelRecompile": true,
+  "_NotifyDeoptimized": true,
+  "_NotifyStubFailure": true,
+  "_NotifyOSR": true,
+  "_CreateObjectLiteralBoilerplate": true,
+  "_CloneLiteralBoilerplate": true,
+  "_CloneShallowLiteralBoilerplate": true,
+  "_CreateArrayLiteralBoilerplate": true,
+  "_IS_VAR": true,
+  "_ResolvePossiblyDirectEval": true,
+  "_Log": true,
+  "_DeclareGlobals": true,
 
-  "PromoteScheduledException": true,
-  "DeleteHandleScopeExtensions": true,
+  "_PromoteScheduledException": true,
+  "_DeleteHandleScopeExtensions": true,
 
   // Vararg with minimum number > 0.
-  "Call": true,
+  "_Call": true,
 
   // Requires integer arguments to be non-negative.
-  "Apply": true,
+  "_Apply": true,
 
   // That can only be invoked on Array.prototype.
-  "FinishArrayPrototypeSetup": true,
+  "_FinishArrayPrototypeSetup": true,
 
-  "_SwapElements": true,
+  "__SwapElements": true,
 
   // Performance critical functions which cannot afford type checks.
-  "_IsNativeOrStrictMode": true,
-  "_CallFunction": true,
+  "__IsNativeOrStrictMode": true,
+  "__CallFunction": true,
 
   // Tries to allocate based on argument, and (correctly) throws
   // out-of-memory if the request is too large. In practice, the
   // size will be the number of captures of a RegExp.
-  "RegExpConstructResult": true,
   "_RegExpConstructResult": true,
+  "__RegExpConstructResult": true,
 
   // This functions perform some checks compile time (they require one of their
   // arguments to be a compile time smi).
-  "_DateField": true,
-  "_GetFromCache": true,
+  "__DateField": true,
+  "__GetFromCache": true,
 
   // This function expects its first argument to be a non-smi.
-  "_IsStringWrapperSafeForDefaultValueOf" : true,
+  "__IsStringWrapperSafeForDefaultValueOf" : true,
 
   // Only applicable to strings.
-  "_HasCachedArrayIndex": true,
-  "_GetCachedArrayIndex": true,
-  "_OneByteSeqStringSetChar": true,
-  "_TwoByteSeqStringSetChar": true,
+  "__HasCachedArrayIndex": true,
+  "__GetCachedArrayIndex": true,
+  "__OneByteSeqStringSetChar": true,
+  "__TwoByteSeqStringSetChar": true,
 
   // Only for debugging parallel recompilation.
-  "InstallRecompiledCode": true,
-  "ForceParallelRecompile": true
+  "_InstallRecompiledCode": true,
+  "_ForceParallelRecompile": true
 };
 
 var currentlyUncallable = {
   // We need to find a way to test this without breaking the system.
-  "SystemBreak": true
+  "_SystemBreak": true
 };
 
 function testNatives() {
   var allNatives = %ListNatives();
   var start = 0;
   var stop = (allNatives.length >> 2);
   for (var i = start; i < stop; i++) {
     var nativeInfo = allNatives[i];
     var name = nativeInfo[0];
     if (name in knownProblems || name in currentlyUncallable)
       continue;
     print(name);
     var argc = nativeInfo[1];
     testArgumentCount(name, argc);
     testArgumentTypes(name, argc);
   }
 }
 
 testNatives();