Update src/3rdparty/webkit from trunk.

Imported from 839d8709327f925aacb3b6362c06152594def97e
in branch qtwebkit-2.0 of repository
git://gitorious.org/+qtwebkit-developers/webkit/qtwebkit.git

Rubber-stamped-by: Simon Hausmann

6 files changed, 498 insertions, 79 deletions

diff --git a/src/3rdparty/webkit/JavaScriptCore/interpreter/CachedCall.h b/src/3rdparty/webkit/JavaScriptCore/interpreter/CachedCall.h
index e903b79..eb48a03 100644
--- a/src/3rdparty/webkit/JavaScriptCore/interpreter/CachedCall.h
+++ b/src/3rdparty/webkit/JavaScriptCore/interpreter/CachedCall.h
@@ -38,7 +38,7 @@ namespace JSC {
             : m_valid(false)
             , m_interpreter(callFrame->interpreter())
             , m_exception(exception)
-            , m_globalObjectScope(callFrame, callFrame->globalData().dynamicGlobalObject ? callFrame->globalData().dynamicGlobalObject : function->scope().globalObject())
+            , m_globalObjectScope(callFrame, function->scope().globalObject())
         {
             ASSERT(!function->isHostFunction());
             m_closure = m_interpreter->prepareForRepeatCall(function->jsExecutable(), callFrame, function, argCount, function->scope().node(), exception);
@@ -52,7 +52,14 @@ namespace JSC {
         }
         void setThis(JSValue v) { m_closure.setArgument(0, v); }
         void setArgument(int n, JSValue v) { m_closure.setArgument(n + 1, v); }
-        CallFrame* newCallFrame() { return m_closure.newCallFrame; }
+
+        CallFrame* newCallFrame(ExecState* exec)
+        {
+            CallFrame* callFrame = m_closure.newCallFrame;
+            callFrame->setScopeChain(exec->scopeChain());
+            return callFrame;
+        }
+
         ~CachedCall()
         {
             if (m_valid)
diff --git a/src/3rdparty/webkit/JavaScriptCore/interpreter/CallFrame.h b/src/3rdparty/webkit/JavaScriptCore/interpreter/CallFrame.h
index b4d49db..e3ea689 100644
--- a/src/3rdparty/webkit/JavaScriptCore/interpreter/CallFrame.h
+++ b/src/3rdparty/webkit/JavaScriptCore/interpreter/CallFrame.h
@@ -39,7 +39,11 @@ namespace JSC  {
     public:
         JSFunction* callee() const { return this[RegisterFile::Callee].function(); }
         CodeBlock* codeBlock() const { return this[RegisterFile::CodeBlock].Register::codeBlock(); }
-        ScopeChainNode* scopeChain() const { return this[RegisterFile::ScopeChain].Register::scopeChain(); }
+        ScopeChainNode* scopeChain() const
+        {
+            ASSERT(this[RegisterFile::ScopeChain].Register::scopeChain());
+            return this[RegisterFile::ScopeChain].Register::scopeChain();
+        }
         int argumentCount() const { return this[RegisterFile::ArgumentCount].i(); }
 
         JSValue thisValue();
@@ -66,6 +70,7 @@ namespace JSC  {
         // or a pointer everywhere.
         JSGlobalData& globalData() const
         {
+            ASSERT(scopeChain()->globalData);
             return *scopeChain()->globalData;
         }
 
@@ -105,9 +110,9 @@ namespace JSC  {
         Arguments* optionalCalleeArguments() const { return this[RegisterFile::OptionalCalleeArguments].arguments(); }
         Instruction* returnPC() const { return this[RegisterFile::ReturnPC].vPC(); }
 
-        void setCalleeArguments(JSValue arguments) { this[RegisterFile::OptionalCalleeArguments] = arguments; }
-        void setCallerFrame(CallFrame* callerFrame) { this[RegisterFile::CallerFrame] = callerFrame; }
-        void setScopeChain(ScopeChainNode* scopeChain) { this[RegisterFile::ScopeChain] = scopeChain; }
+        void setCalleeArguments(JSValue arguments) { static_cast<Register*>(this)[RegisterFile::OptionalCalleeArguments] = arguments; }
+        void setCallerFrame(CallFrame* callerFrame) { static_cast<Register*>(this)[RegisterFile::CallerFrame] = callerFrame; }
+        void setScopeChain(ScopeChainNode* scopeChain) { static_cast<Register*>(this)[RegisterFile::ScopeChain] = scopeChain; }
 
         ALWAYS_INLINE void init(CodeBlock* codeBlock, Instruction* vPC, ScopeChainNode* scopeChain,
             CallFrame* callerFrame, int returnValueRegister, int argc, JSFunction* function)
@@ -117,8 +122,8 @@ namespace JSC  {
             setCodeBlock(codeBlock);
             setScopeChain(scopeChain);
             setCallerFrame(callerFrame);
-            this[RegisterFile::ReturnPC] = vPC; // This is either an Instruction* or a pointer into JIT generated code stored as an Instruction*.
-            this[RegisterFile::ReturnValueRegister] = Register::withInt(returnValueRegister);
+            static_cast<Register*>(this)[RegisterFile::ReturnPC] = vPC; // This is either an Instruction* or a pointer into JIT generated code stored as an Instruction*.
+            static_cast<Register*>(this)[RegisterFile::ReturnValueRegister] = Register::withInt(returnValueRegister);
             setArgumentCount(argc); // original argument count (for the sake of the "arguments" object)
             setCallee(function);
             setCalleeArguments(JSValue());
@@ -135,9 +140,9 @@ namespace JSC  {
         CallFrame* removeHostCallFrameFlag() { return reinterpret_cast<CallFrame*>(reinterpret_cast<intptr_t>(this) & ~HostCallFrameFlag); }
 
     private:
-        void setArgumentCount(int count) { this[RegisterFile::ArgumentCount] = Register::withInt(count); }
-        void setCallee(JSFunction* callee) { this[RegisterFile::Callee] = callee; }
-        void setCodeBlock(CodeBlock* codeBlock) { this[RegisterFile::CodeBlock] = codeBlock; }
+        void setArgumentCount(int count) { static_cast<Register*>(this)[RegisterFile::ArgumentCount] = Register::withInt(count); }
+        void setCallee(JSFunction* callee) { static_cast<Register*>(this)[RegisterFile::Callee] = callee; }
+        void setCodeBlock(CodeBlock* codeBlock) { static_cast<Register*>(this)[RegisterFile::CodeBlock] = codeBlock; }
 
         static const intptr_t HostCallFrameFlag = 1;
 
diff --git a/src/3rdparty/webkit/JavaScriptCore/interpreter/Interpreter.cpp b/src/3rdparty/webkit/JavaScriptCore/interpreter/Interpreter.cpp
index db0edc4..2713fd4 100644
--- a/src/3rdparty/webkit/JavaScriptCore/interpreter/Interpreter.cpp
+++ b/src/3rdparty/webkit/JavaScriptCore/interpreter/Interpreter.cpp
@@ -40,6 +40,7 @@
 #include "DebuggerCallFrame.h"
 #include "EvalCodeCache.h"
 #include "ExceptionHelpers.h"
+#include "GetterSetter.h"
 #include "GlobalEvalFunction.h"
 #include "JSActivation.h"
 #include "JSArray.h"
@@ -169,7 +170,7 @@ NEVER_INLINE bool Interpreter::resolveGlobal(CallFrame* callFrame, Instruction*
     PropertySlot slot(globalObject);
     if (globalObject->getPropertySlot(callFrame, ident, slot)) {
         JSValue result = slot.getValue(callFrame, ident);
-        if (slot.isCacheable() && !globalObject->structure()->isUncacheableDictionary() && slot.slotBase() == globalObject) {
+        if (slot.isCacheableValue() && !globalObject->structure()->isUncacheableDictionary() && slot.slotBase() == globalObject) {
             if (vPC[4].u.structure)
                 vPC[4].u.structure->deref();
             globalObject->structure()->ref();
@@ -300,7 +301,7 @@ NEVER_INLINE JSValue Interpreter::callEval(CallFrame* callFrame, RegisterFile* r
     if (!program.isString())
         return program;
 
-    UString programSource = asString(program)->value();
+    UString programSource = asString(program)->value(callFrame);
 
     LiteralParser preparser(callFrame, programSource, LiteralParser::NonStrictJSON);
     if (JSValue parsedObject = preparser.tryLiteralParse())
@@ -321,7 +322,13 @@ Interpreter::Interpreter()
     : m_sampleEntryDepth(0)
     , m_reentryDepth(0)
 {
+#if HAVE(COMPUTED_GOTO)
     privateExecute(InitializeAndReturn, 0, 0, 0);
+
+    for (int i = 0; i < numOpcodeIDs; ++i)
+        m_opcodeIDTable.add(m_opcodeTable[i], static_cast<OpcodeID>(i));
+#endif // HAVE(COMPUTED_GOTO)
+
 #if ENABLE(OPCODE_SAMPLING)
     enableSampler();
 #endif
@@ -527,7 +534,8 @@ NEVER_INLINE HandlerInfo* Interpreter::throwException(CallFrame*& callFrame, JSV
 
     if (Debugger* debugger = callFrame->dynamicGlobalObject()->debugger()) {
         DebuggerCallFrame debuggerCallFrame(callFrame, exceptionValue);
-        debugger->exception(debuggerCallFrame, codeBlock->ownerExecutable()->sourceID(), codeBlock->lineNumberForBytecodeOffset(callFrame, bytecodeOffset));
+        bool hasHandler = codeBlock->handlerForBytecodeOffset(bytecodeOffset);
+        debugger->exception(debuggerCallFrame, codeBlock->ownerExecutable()->sourceID(), codeBlock->lineNumberForBytecodeOffset(callFrame, bytecodeOffset), hasHandler);
     }
 
     // If we throw in the middle of a call instruction, we need to notify
@@ -537,7 +545,7 @@ NEVER_INLINE HandlerInfo* Interpreter::throwException(CallFrame*& callFrame, JSV
 #if !ENABLE(JIT)
         if (isCallBytecode(codeBlock->instructions()[bytecodeOffset].u.opcode))
             profiler->didExecute(callFrame, callFrame->r(codeBlock->instructions()[bytecodeOffset + 2].u.operand).jsValue());
-        else if (codeBlock->instructions()[bytecodeOffset + 8].u.opcode == getOpcode(op_construct))
+        else if (codeBlock->instructions().size() > (bytecodeOffset + 8) && codeBlock->instructions()[bytecodeOffset + 8].u.opcode == getOpcode(op_construct))
             profiler->didExecute(callFrame, callFrame->r(codeBlock->instructions()[bytecodeOffset + 10].u.operand).jsValue());
 #else
         int functionRegisterIndex;
@@ -647,7 +655,7 @@ JSValue Interpreter::execute(FunctionExecutable* functionExecutable, CallFrame*
         return jsNull();
     }
 
-    DynamicGlobalObjectScope globalObjectScope(callFrame, callFrame->globalData().dynamicGlobalObject ? callFrame->globalData().dynamicGlobalObject : scopeChain->globalObject);
+    DynamicGlobalObjectScope globalObjectScope(callFrame, scopeChain->globalObject);
 
     CallFrame* newCallFrame = CallFrame::create(oldEnd);
     size_t dst = 0;
@@ -777,7 +785,7 @@ JSValue Interpreter::execute(EvalExecutable* eval, CallFrame* callFrame, JSObjec
         }
     }
 
-    DynamicGlobalObjectScope globalObjectScope(callFrame, callFrame->globalData().dynamicGlobalObject ? callFrame->globalData().dynamicGlobalObject : scopeChain->globalObject);
+    DynamicGlobalObjectScope globalObjectScope(callFrame, scopeChain->globalObject);
 
     EvalCodeBlock* codeBlock = &eval->bytecode(callFrame, scopeChain);
 
@@ -1022,8 +1030,20 @@ NEVER_INLINE void Interpreter::tryCacheGetByID(CallFrame* callFrame, CodeBlock*
     // Cache hit: Specialize instruction and ref Structures.
 
     if (slot.slotBase() == baseValue) {
-        vPC[0] = getOpcode(op_get_by_id_self);
-        vPC[5] = slot.cachedOffset();
+        switch (slot.cachedPropertyType()) {
+        case PropertySlot::Getter:
+            vPC[0] = getOpcode(op_get_by_id_getter_self);
+            vPC[5] = slot.cachedOffset();
+            break;
+        case PropertySlot::Custom:
+            vPC[0] = getOpcode(op_get_by_id_custom_self);
+            vPC[5] = slot.customGetter();
+            break;
+        default:
+            vPC[0] = getOpcode(op_get_by_id_self);
+            vPC[5] = slot.cachedOffset();
+            break;
+        }
 
         codeBlock->refStructures(vPC);
         return;
@@ -1038,33 +1058,62 @@ NEVER_INLINE void Interpreter::tryCacheGetByID(CallFrame* callFrame, CodeBlock*
         ASSERT(slot.slotBase().isObject());
 
         JSObject* baseObject = asObject(slot.slotBase());
+        size_t offset = slot.cachedOffset();
 
         // Since we're accessing a prototype in a loop, it's a good bet that it
         // should not be treated as a dictionary.
-        if (baseObject->structure()->isDictionary())
-            baseObject->setStructure(Structure::fromDictionaryTransition(baseObject->structure()));
+        if (baseObject->structure()->isDictionary()) {
+            baseObject->flattenDictionaryObject();
+            offset = baseObject->structure()->get(propertyName);
+        }
 
         ASSERT(!baseObject->structure()->isUncacheableDictionary());
-
-        vPC[0] = getOpcode(op_get_by_id_proto);
+        
+        switch (slot.cachedPropertyType()) {
+        case PropertySlot::Getter:
+            vPC[0] = getOpcode(op_get_by_id_getter_proto);
+            vPC[6] = offset;
+            break;
+        case PropertySlot::Custom:
+            vPC[0] = getOpcode(op_get_by_id_custom_proto);
+            vPC[6] = slot.customGetter();
+            break;
+        default:
+            vPC[0] = getOpcode(op_get_by_id_proto);
+            vPC[6] = offset;
+            break;
+        }
         vPC[5] = baseObject->structure();
-        vPC[6] = slot.cachedOffset();
 
         codeBlock->refStructures(vPC);
         return;
     }
 
-    size_t count = normalizePrototypeChain(callFrame, baseValue, slot.slotBase());
+    size_t offset = slot.cachedOffset();
+    size_t count = normalizePrototypeChain(callFrame, baseValue, slot.slotBase(), propertyName, offset);
     if (!count) {
         vPC[0] = getOpcode(op_get_by_id_generic);
         return;
     }
 
-    vPC[0] = getOpcode(op_get_by_id_chain);
+    
+    switch (slot.cachedPropertyType()) {
+    case PropertySlot::Getter:
+        vPC[0] = getOpcode(op_get_by_id_getter_chain);
+        vPC[7] = offset;
+        break;
+    case PropertySlot::Custom:
+        vPC[0] = getOpcode(op_get_by_id_custom_chain);
+        vPC[7] = slot.customGetter();
+        break;
+    default:
+        vPC[0] = getOpcode(op_get_by_id_chain);
+        vPC[7] = offset;
+        break;
+    }
     vPC[4] = structure;
     vPC[5] = structure->prototypeChain(callFrame);
     vPC[6] = count;
-    vPC[7] = slot.cachedOffset();
     codeBlock->refStructures(vPC);
 }
 
@@ -1081,16 +1130,13 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
 {
     // One-time initialization of our address tables. We have to put this code
     // here because our labels are only in scope inside this function.
-    if (flag == InitializeAndReturn) {
+    if (UNLIKELY(flag == InitializeAndReturn)) {
         #if HAVE(COMPUTED_GOTO)
-            #define ADD_BYTECODE(id, length) m_opcodeTable[id] = &&id;
-                FOR_EACH_OPCODE_ID(ADD_BYTECODE);
-            #undef ADD_BYTECODE
-
-            #define ADD_OPCODE_ID(id, length) m_opcodeIDTable.add(&&id, id);
-                FOR_EACH_OPCODE_ID(ADD_OPCODE_ID);
-            #undef ADD_OPCODE_ID
-            ASSERT(m_opcodeIDTable.size() == numOpcodeIDs);
+            #define LIST_OPCODE_LABEL(id, length) &&id,
+                static Opcode labels[] = { FOR_EACH_OPCODE_ID(LIST_OPCODE_LABEL) };
+                for (size_t i = 0; i < sizeof(labels) / sizeof(Opcode); ++i)
+                    m_opcodeTable[i] = labels[i];
+            #undef LIST_OPCODE_LABEL
         #endif // HAVE(COMPUTED_GOTO)
         return JSValue();
     }
@@ -1306,7 +1352,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         int dst = vPC[1].u.operand;
         JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
         JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
-        callFrame->r(dst) = jsBoolean(JSValue::strictEqual(src1, src2));
+        callFrame->r(dst) = jsBoolean(JSValue::strictEqual(callFrame, src1, src2));
 
         vPC += OPCODE_LENGTH(op_stricteq);
         NEXT_INSTRUCTION();
@@ -1321,7 +1367,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         int dst = vPC[1].u.operand;
         JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
         JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
-        callFrame->r(dst) = jsBoolean(!JSValue::strictEqual(src1, src2));
+        callFrame->r(dst) = jsBoolean(!JSValue::strictEqual(callFrame, src1, src2));
 
         vPC += OPCODE_LENGTH(op_nstricteq);
         NEXT_INSTRUCTION();
@@ -1474,7 +1520,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         */
         int dst = vPC[1].u.operand;
         JSValue src = callFrame->r(vPC[2].u.operand).jsValue();
-        if (src.isInt32() && src.asInt32())
+        if (src.isInt32() && (src.asInt32() & 0x7fffffff)) // non-zero and no overflow
             callFrame->r(dst) = jsNumber(callFrame, -src.asInt32());
         else {
             JSValue result = jsNumber(callFrame, -src.toNumber(callFrame));
@@ -1495,7 +1541,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         int dst = vPC[1].u.operand;
         JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
         JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
-        if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | src2.asInt32() & 0xc0000000)) // no overflow
+        if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | (src2.asInt32() & 0xc0000000))) // no overflow
             callFrame->r(dst) = jsNumber(callFrame, src1.asInt32() + src2.asInt32());
         else {
             JSValue result = jsAdd(callFrame, src1, src2);
@@ -1582,7 +1628,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         int dst = vPC[1].u.operand;
         JSValue src1 = callFrame->r(vPC[2].u.operand).jsValue();
         JSValue src2 = callFrame->r(vPC[3].u.operand).jsValue();
-        if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | src2.asInt32() & 0xc0000000)) // no overflow
+        if (src1.isInt32() && src2.isInt32() && !(src1.asInt32() | (src2.asInt32() & 0xc0000000))) // no overflow
             callFrame->r(dst) = jsNumber(callFrame, src1.asInt32() - src2.asInt32());
         else {
             JSValue result = jsNumber(callFrame, src1.toNumber(callFrame) - src2.toNumber(callFrame));
@@ -2153,6 +2199,93 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         uncacheGetByID(callFrame->codeBlock(), vPC);
         NEXT_INSTRUCTION();
     }
+#if HAVE(COMPUTED_GOTO)
+    goto *(&&skip_id_getter_proto);
+#endif
+    DEFINE_OPCODE(op_get_by_id_getter_proto) {
+        /* op_get_by_id_getter_proto dst(r) base(r) property(id) structure(sID) prototypeStructure(sID) offset(n) nop(n)
+         
+         Cached property access: Attempts to get a cached getter property from the
+         value base's prototype. If the cache misses, op_get_by_id_getter_proto
+         reverts to op_get_by_id.
+         */
+        int base = vPC[2].u.operand;
+        JSValue baseValue = callFrame->r(base).jsValue();
+        
+        if (LIKELY(baseValue.isCell())) {
+            JSCell* baseCell = asCell(baseValue);
+            Structure* structure = vPC[4].u.structure;
+            
+            if (LIKELY(baseCell->structure() == structure)) {
+                ASSERT(structure->prototypeForLookup(callFrame).isObject());
+                JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
+                Structure* prototypeStructure = vPC[5].u.structure;
+                
+                if (LIKELY(protoObject->structure() == prototypeStructure)) {
+                    int dst = vPC[1].u.operand;
+                    int offset = vPC[6].u.operand;
+                    if (GetterSetter* getterSetter = asGetterSetter(protoObject->getDirectOffset(offset).asCell())) {
+                        JSObject* getter = getterSetter->getter();
+                        CallData callData;
+                        CallType callType = getter->getCallData(callData);
+                        JSValue result = call(callFrame, getter, callType, callData, asObject(baseCell), ArgList());
+                        CHECK_FOR_EXCEPTION();
+                        callFrame->r(dst) = result;
+                    } else
+                        callFrame->r(dst) = jsUndefined();
+                    vPC += OPCODE_LENGTH(op_get_by_id_getter_proto);
+                    NEXT_INSTRUCTION();
+                }
+            }
+        }
+        uncacheGetByID(callFrame->codeBlock(), vPC);
+        NEXT_INSTRUCTION();
+    }
+#if HAVE(COMPUTED_GOTO)
+    skip_id_getter_proto:
+#endif
+#if HAVE(COMPUTED_GOTO)
+    goto *(&&skip_id_custom_proto);
+#endif
+    DEFINE_OPCODE(op_get_by_id_custom_proto) {
+        /* op_get_by_id_custom_proto dst(r) base(r) property(id) structure(sID) prototypeStructure(sID) offset(n) nop(n)
+         
+         Cached property access: Attempts to use a cached named property getter
+         from the value base's prototype. If the cache misses, op_get_by_id_custom_proto
+         reverts to op_get_by_id.
+         */
+        int base = vPC[2].u.operand;
+        JSValue baseValue = callFrame->r(base).jsValue();
+        
+        if (LIKELY(baseValue.isCell())) {
+            JSCell* baseCell = asCell(baseValue);
+            Structure* structure = vPC[4].u.structure;
+            
+            if (LIKELY(baseCell->structure() == structure)) {
+                ASSERT(structure->prototypeForLookup(callFrame).isObject());
+                JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
+                Structure* prototypeStructure = vPC[5].u.structure;
+                
+                if (LIKELY(protoObject->structure() == prototypeStructure)) {
+                    int dst = vPC[1].u.operand;
+                    int property = vPC[3].u.operand;
+                    Identifier& ident = callFrame->codeBlock()->identifier(property);
+                    
+                    PropertySlot::GetValueFunc getter = vPC[6].u.getterFunc;
+                    JSValue result = getter(callFrame, protoObject, ident);
+                    CHECK_FOR_EXCEPTION();
+                    callFrame->r(dst) = result;
+                    vPC += OPCODE_LENGTH(op_get_by_id_custom_proto);
+                    NEXT_INSTRUCTION();
+                }
+            }
+        }
+        uncacheGetByID(callFrame->codeBlock(), vPC);
+        NEXT_INSTRUCTION();
+    }
+#if HAVE(COMPUTED_GOTO)
+    skip_id_custom_proto:
+#endif
     DEFINE_OPCODE(op_get_by_id_self_list) {
         // Polymorphic self access caching currently only supported when JITting.
         ASSERT_NOT_REACHED();
@@ -2167,6 +2300,34 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         vPC += OPCODE_LENGTH(op_get_by_id_proto_list);
         NEXT_INSTRUCTION();
     }
+    DEFINE_OPCODE(op_get_by_id_getter_self_list) {
+        // Polymorphic self access caching currently only supported when JITting.
+        ASSERT_NOT_REACHED();
+        // This case of the switch must not be empty, else (op_get_by_id_self_list == op_get_by_id_chain)!
+        vPC += OPCODE_LENGTH(op_get_by_id_self_list);
+        NEXT_INSTRUCTION();
+    }
+    DEFINE_OPCODE(op_get_by_id_getter_proto_list) {
+        // Polymorphic prototype access caching currently only supported when JITting.
+        ASSERT_NOT_REACHED();
+        // This case of the switch must not be empty, else (op_get_by_id_proto_list == op_get_by_id_chain)!
+        vPC += OPCODE_LENGTH(op_get_by_id_proto_list);
+        NEXT_INSTRUCTION();
+    }
+    DEFINE_OPCODE(op_get_by_id_custom_self_list) {
+        // Polymorphic self access caching currently only supported when JITting.
+        ASSERT_NOT_REACHED();
+        // This case of the switch must not be empty, else (op_get_by_id_self_list == op_get_by_id_chain)!
+        vPC += OPCODE_LENGTH(op_get_by_id_custom_self_list);
+        NEXT_INSTRUCTION();
+    }
+    DEFINE_OPCODE(op_get_by_id_custom_proto_list) {
+        // Polymorphic prototype access caching currently only supported when JITting.
+        ASSERT_NOT_REACHED();
+        // This case of the switch must not be empty, else (op_get_by_id_proto_list == op_get_by_id_chain)!
+        vPC += OPCODE_LENGTH(op_get_by_id_proto_list);
+        NEXT_INSTRUCTION();
+    }
     DEFINE_OPCODE(op_get_by_id_chain) {
         /* op_get_by_id_chain dst(r) base(r) property(id) structure(sID) structureChain(chain) count(n) offset(n)
 
@@ -2213,6 +2374,86 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         uncacheGetByID(callFrame->codeBlock(), vPC);
         NEXT_INSTRUCTION();
     }
+#if HAVE(COMPUTED_GOTO)
+    goto *(&&skip_id_getter_self);
+#endif
+    DEFINE_OPCODE(op_get_by_id_getter_self) {
+        /* op_get_by_id_self dst(r) base(r) property(id) structure(sID) offset(n) nop(n) nop(n)
+         
+         Cached property access: Attempts to get a cached property from the
+         value base. If the cache misses, op_get_by_id_getter_self reverts to
+         op_get_by_id.
+         */
+        int base = vPC[2].u.operand;
+        JSValue baseValue = callFrame->r(base).jsValue();
+        
+        if (LIKELY(baseValue.isCell())) {
+            JSCell* baseCell = asCell(baseValue);
+            Structure* structure = vPC[4].u.structure;
+            
+            if (LIKELY(baseCell->structure() == structure)) {
+                ASSERT(baseCell->isObject());
+                JSObject* baseObject = asObject(baseCell);
+                int dst = vPC[1].u.operand;
+                int offset = vPC[5].u.operand;
+
+                if (GetterSetter* getterSetter = asGetterSetter(baseObject->getDirectOffset(offset).asCell())) {
+                    JSObject* getter = getterSetter->getter();
+                    CallData callData;
+                    CallType callType = getter->getCallData(callData);
+                    JSValue result = call(callFrame, getter, callType, callData, baseObject, ArgList());
+                    CHECK_FOR_EXCEPTION();
+                    callFrame->r(dst) = result;
+                } else
+                    callFrame->r(dst) = jsUndefined();
+
+                vPC += OPCODE_LENGTH(op_get_by_id_getter_self);
+                NEXT_INSTRUCTION();
+            }
+        }
+        uncacheGetByID(callFrame->codeBlock(), vPC);
+        NEXT_INSTRUCTION();
+    }
+#if HAVE(COMPUTED_GOTO)
+    skip_id_getter_self:
+#endif
+#if HAVE(COMPUTED_GOTO)
+    goto *(&&skip_id_custom_self);
+#endif
+    DEFINE_OPCODE(op_get_by_id_custom_self) {
+        /* op_get_by_id_custom_self dst(r) base(r) property(id) structure(sID) offset(n) nop(n) nop(n)
+         
+         Cached property access: Attempts to use a cached named property getter
+         from the value base. If the cache misses, op_get_by_id_custom_self reverts to
+         op_get_by_id.
+         */
+        int base = vPC[2].u.operand;
+        JSValue baseValue = callFrame->r(base).jsValue();
+        
+        if (LIKELY(baseValue.isCell())) {
+            JSCell* baseCell = asCell(baseValue);
+            Structure* structure = vPC[4].u.structure;
+            
+            if (LIKELY(baseCell->structure() == structure)) {
+                ASSERT(baseCell->isObject());
+                int dst = vPC[1].u.operand;
+                int property = vPC[3].u.operand;
+                Identifier& ident = callFrame->codeBlock()->identifier(property);
+
+                PropertySlot::GetValueFunc getter = vPC[5].u.getterFunc;
+                JSValue result = getter(callFrame, baseValue, ident);
+                CHECK_FOR_EXCEPTION();
+                callFrame->r(dst) = result;
+                vPC += OPCODE_LENGTH(op_get_by_id_custom_self);
+                NEXT_INSTRUCTION();
+            }
+        }
+        uncacheGetByID(callFrame->codeBlock(), vPC);
+        NEXT_INSTRUCTION();
+    }
+#if HAVE(COMPUTED_GOTO)
+skip_id_custom_self:
+#endif
     DEFINE_OPCODE(op_get_by_id_generic) {
         /* op_get_by_id_generic dst(r) base(r) property(id) nop(sID) nop(n) nop(n) nop(n)
 
@@ -2233,6 +2474,113 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         vPC += OPCODE_LENGTH(op_get_by_id_generic);
         NEXT_INSTRUCTION();
     }
+#if HAVE(COMPUTED_GOTO)
+    goto *(&&skip_id_getter_chain);
+#endif
+    DEFINE_OPCODE(op_get_by_id_getter_chain) {
+        /* op_get_by_id_getter_chain dst(r) base(r) property(id) structure(sID) structureChain(chain) count(n) offset(n)
+         
+         Cached property access: Attempts to get a cached property from the
+         value base's prototype chain. If the cache misses, op_get_by_id_getter_chain
+         reverts to op_get_by_id.
+         */
+        int base = vPC[2].u.operand;
+        JSValue baseValue = callFrame->r(base).jsValue();
+        
+        if (LIKELY(baseValue.isCell())) {
+            JSCell* baseCell = asCell(baseValue);
+            Structure* structure = vPC[4].u.structure;
+            
+            if (LIKELY(baseCell->structure() == structure)) {
+                RefPtr<Structure>* it = vPC[5].u.structureChain->head();
+                size_t count = vPC[6].u.operand;
+                RefPtr<Structure>* end = it + count;
+                
+                while (true) {
+                    JSObject* baseObject = asObject(baseCell->structure()->prototypeForLookup(callFrame));
+                    
+                    if (UNLIKELY(baseObject->structure() != (*it).get()))
+                        break;
+                    
+                    if (++it == end) {
+                        int dst = vPC[1].u.operand;
+                        int offset = vPC[7].u.operand;
+                        if (GetterSetter* getterSetter = asGetterSetter(baseObject->getDirectOffset(offset).asCell())) {
+                            JSObject* getter = getterSetter->getter();
+                            CallData callData;
+                            CallType callType = getter->getCallData(callData);
+                            JSValue result = call(callFrame, getter, callType, callData, baseValue, ArgList());
+                            CHECK_FOR_EXCEPTION();
+                            callFrame->r(dst) = result;
+                        } else
+                            callFrame->r(dst) = jsUndefined();
+                        vPC += OPCODE_LENGTH(op_get_by_id_getter_chain);
+                        NEXT_INSTRUCTION();
+                    }
+                    
+                    // Update baseCell, so that next time around the loop we'll pick up the prototype's prototype.
+                    baseCell = baseObject;
+                }
+            }
+        }
+        uncacheGetByID(callFrame->codeBlock(), vPC);
+        NEXT_INSTRUCTION();
+    }
+#if HAVE(COMPUTED_GOTO)
+    skip_id_getter_chain:
+#endif
+#if HAVE(COMPUTED_GOTO)
+    goto *(&&skip_id_custom_chain);
+#endif
+    DEFINE_OPCODE(op_get_by_id_custom_chain) {
+        /* op_get_by_id_custom_chain dst(r) base(r) property(id) structure(sID) structureChain(chain) count(n) offset(n)
+         
+         Cached property access: Attempts to use a cached named property getter on the
+         value base's prototype chain. If the cache misses, op_get_by_id_custom_chain
+         reverts to op_get_by_id.
+         */
+        int base = vPC[2].u.operand;
+        JSValue baseValue = callFrame->r(base).jsValue();
+        
+        if (LIKELY(baseValue.isCell())) {
+            JSCell* baseCell = asCell(baseValue);
+            Structure* structure = vPC[4].u.structure;
+            
+            if (LIKELY(baseCell->structure() == structure)) {
+                RefPtr<Structure>* it = vPC[5].u.structureChain->head();
+                size_t count = vPC[6].u.operand;
+                RefPtr<Structure>* end = it + count;
+                
+                while (true) {
+                    JSObject* baseObject = asObject(baseCell->structure()->prototypeForLookup(callFrame));
+                    
+                    if (UNLIKELY(baseObject->structure() != (*it).get()))
+                        break;
+                    
+                    if (++it == end) {
+                        int dst = vPC[1].u.operand;
+                        int property = vPC[3].u.operand;
+                        Identifier& ident = callFrame->codeBlock()->identifier(property);
+                        
+                        PropertySlot::GetValueFunc getter = vPC[7].u.getterFunc;
+                        JSValue result = getter(callFrame, baseObject, ident);
+                        CHECK_FOR_EXCEPTION();
+                        callFrame->r(dst) = result;
+                        vPC += OPCODE_LENGTH(op_get_by_id_custom_chain);
+                        NEXT_INSTRUCTION();
+                    }
+                    
+                    // Update baseCell, so that next time around the loop we'll pick up the prototype's prototype.
+                    baseCell = baseObject;
+                }
+            }
+        }
+        uncacheGetByID(callFrame->codeBlock(), vPC);
+        NEXT_INSTRUCTION();
+    }
+#if HAVE(COMPUTED_GOTO)
+    skip_id_custom_chain:
+#endif
     DEFINE_OPCODE(op_get_array_length) {
         /* op_get_array_length dst(r) base(r) property(id) nop(sID) nop(n) nop(n) nop(n)
 
@@ -2265,7 +2613,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         JSValue baseValue = callFrame->r(base).jsValue();
         if (LIKELY(isJSString(globalData, baseValue))) {
             int dst = vPC[1].u.operand;
-            callFrame->r(dst) = jsNumber(callFrame, asString(baseValue)->value().size());
+            callFrame->r(dst) = jsNumber(callFrame, asString(baseValue)->length());
             vPC += OPCODE_LENGTH(op_get_string_length);
             NEXT_INSTRUCTION();
         }
@@ -2479,7 +2827,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
                 else
                     result = jsArray->JSArray::get(callFrame, i);
             } else if (isJSString(globalData, baseValue) && asString(baseValue)->canGetIndex(i))
-                result = asString(baseValue)->getIndex(&callFrame->globalData(), i);
+                result = asString(baseValue)->getIndex(callFrame, i);
             else if (isJSByteArray(globalData, baseValue) && asByteArray(baseValue)->canAccessIndex(i))
                 result = asByteArray(baseValue)->getIndex(callFrame, i);
             else
@@ -2647,6 +2995,26 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         vPC += OPCODE_LENGTH(op_loop_if_true);
         NEXT_INSTRUCTION();
     }
+    DEFINE_OPCODE(op_loop_if_false) {
+        /* loop_if_true cond(r) target(offset)
+         
+           Jumps to offset target from the current instruction, if and
+           only if register cond converts to boolean as false.
+
+           Additionally this loop instruction may terminate JS execution is
+           the JS timeout is reached.
+         */
+        int cond = vPC[1].u.operand;
+        int target = vPC[2].u.operand;
+        if (!callFrame->r(cond).jsValue().toBoolean(callFrame)) {
+            vPC += target;
+            CHECK_FOR_TIMEOUT();
+            NEXT_INSTRUCTION();
+        }
+        
+        vPC += OPCODE_LENGTH(op_loop_if_true);
+        NEXT_INSTRUCTION();
+    }
     DEFINE_OPCODE(op_jtrue) {
         /* jtrue cond(r) target(offset)
 
@@ -2707,7 +3075,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         int target = vPC[2].u.operand;
         JSValue srcValue = callFrame->r(src).jsValue();
 
-        if (!srcValue.isUndefinedOrNull() || (srcValue.isCell() && !srcValue.asCell()->structure()->typeInfo().masqueradesAsUndefined())) {
+        if (!srcValue.isUndefinedOrNull() && (!srcValue.isCell() || !srcValue.asCell()->structure()->typeInfo().masqueradesAsUndefined())) {
             vPC += target;
             NEXT_INSTRUCTION();
         }
@@ -2810,6 +3178,29 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         vPC += OPCODE_LENGTH(op_jnless);
         NEXT_INSTRUCTION();
     }
+    DEFINE_OPCODE(op_jless) {
+        /* jless src1(r) src2(r) target(offset)
+
+           Checks whether register src1 is less than register src2, as
+           with the ECMAScript '<' operator, and then jumps to offset
+           target from the current instruction, if and only if the 
+           result of the comparison is true.
+        */
+        JSValue src1 = callFrame->r(vPC[1].u.operand).jsValue();
+        JSValue src2 = callFrame->r(vPC[2].u.operand).jsValue();
+        int target = vPC[3].u.operand;
+
+        bool result = jsLess(callFrame, src1, src2);
+        CHECK_FOR_EXCEPTION();
+        
+        if (result) {
+            vPC += target;
+            NEXT_INSTRUCTION();
+        }
+
+        vPC += OPCODE_LENGTH(op_jless);
+        NEXT_INSTRUCTION();
+    }
     DEFINE_OPCODE(op_jnlesseq) {
         /* jnlesseq src1(r) src2(r) target(offset)
 
@@ -2872,11 +3263,11 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         if (!scrutinee.isString())
             vPC += defaultOffset;
         else {
-            UString::Rep* value = asString(scrutinee)->value().rep();
-            if (value->size() != 1)
+            UString::Rep* value = asString(scrutinee)->value(callFrame).rep();
+            if (value->length() != 1)
                 vPC += defaultOffset;
             else
-                vPC += callFrame->codeBlock()->characterSwitchJumpTable(tableIndex).offsetForValue(value->data()[0], defaultOffset);
+                vPC += callFrame->codeBlock()->characterSwitchJumpTable(tableIndex).offsetForValue(value->characters()[0], defaultOffset);
         }
         NEXT_INSTRUCTION();
     }
@@ -2895,7 +3286,7 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         if (!scrutinee.isString())
             vPC += defaultOffset;
         else 
-            vPC += callFrame->codeBlock()->stringSwitchJumpTable(tableIndex).offsetForValue(asString(scrutinee)->value().rep(), defaultOffset);
+            vPC += callFrame->codeBlock()->stringSwitchJumpTable(tableIndex).offsetForValue(asString(scrutinee)->value(callFrame).rep(), defaultOffset);
         NEXT_INSTRUCTION();
     }
     DEFINE_OPCODE(op_new_func) {
@@ -3487,7 +3878,8 @@ JSValue Interpreter::privateExecute(ExecutionFlag flag, RegisterFile* registerFi
         int src = vPC[2].u.operand;
         int count = vPC[3].u.operand;
 
-        callFrame->r(dst) = concatenateStrings(callFrame, &callFrame->registers()[src], count);
+        callFrame->r(dst) = jsString(callFrame, &callFrame->registers()[src], count);
+        CHECK_FOR_EXCEPTION();
         vPC += OPCODE_LENGTH(op_strcat);
 
         NEXT_INSTRUCTION();
diff --git a/src/3rdparty/webkit/JavaScriptCore/interpreter/Register.h b/src/3rdparty/webkit/JavaScriptCore/interpreter/Register.h
index 76184ba..ecd7403 100644
--- a/src/3rdparty/webkit/JavaScriptCore/interpreter/Register.h
+++ b/src/3rdparty/webkit/JavaScriptCore/interpreter/Register.h
@@ -51,17 +51,18 @@ namespace JSC {
     class Register : public WTF::FastAllocBase {
     public:
         Register();
-        Register(JSValue);
 
+        Register(const JSValue&);
+        Register& operator=(const JSValue&);
         JSValue jsValue() const;
         
-        Register(JSActivation*);
-        Register(CallFrame*);
-        Register(CodeBlock*);
-        Register(JSFunction*);
-        Register(JSPropertyNameIterator*);
-        Register(ScopeChainNode*);
-        Register(Instruction*);
+        Register& operator=(JSActivation*);
+        Register& operator=(CallFrame*);
+        Register& operator=(CodeBlock*);
+        Register& operator=(JSFunction*);
+        Register& operator=(JSPropertyNameIterator*);
+        Register& operator=(ScopeChainNode*);
+        Register& operator=(Instruction*);
 
         int32_t i() const;
         JSActivation* activation() const;
@@ -75,12 +76,12 @@ namespace JSC {
 
         static Register withInt(int32_t i)
         {
-            return Register(i);
+            Register r;
+            r.u.i = i;
+            return r;
         }
 
     private:
-        Register(int32_t);
-
         union {
             int32_t i;
             EncodedJSValue value;
@@ -98,13 +99,25 @@ namespace JSC {
     ALWAYS_INLINE Register::Register()
     {
 #ifndef NDEBUG
-        u.value = JSValue::encode(JSValue());
+        *this = JSValue();
+#endif
+    }
+
+    ALWAYS_INLINE Register::Register(const JSValue& v)
+    {
+#if ENABLE(JSC_ZOMBIES)
+        ASSERT(!v.isZombie());
 #endif
+        u.value = JSValue::encode(v);
     }
 
-    ALWAYS_INLINE Register::Register(JSValue v)
+    ALWAYS_INLINE Register& Register::operator=(const JSValue& v)
     {
+#if ENABLE(JSC_ZOMBIES)
+        ASSERT(!v.isZombie());
+#endif
         u.value = JSValue::encode(v);
+        return *this;
     }
 
     ALWAYS_INLINE JSValue Register::jsValue() const
@@ -114,44 +127,46 @@ namespace JSC {
 
     // Interpreter functions
 
-    ALWAYS_INLINE Register::Register(JSActivation* activation)
+    ALWAYS_INLINE Register& Register::operator=(JSActivation* activation)
     {
         u.activation = activation;
+        return *this;
     }
 
-    ALWAYS_INLINE Register::Register(CallFrame* callFrame)
+    ALWAYS_INLINE Register& Register::operator=(CallFrame* callFrame)
     {
         u.callFrame = callFrame;
+        return *this;
     }
 
-    ALWAYS_INLINE Register::Register(CodeBlock* codeBlock)
+    ALWAYS_INLINE Register& Register::operator=(CodeBlock* codeBlock)
     {
         u.codeBlock = codeBlock;
+        return *this;
     }
 
-    ALWAYS_INLINE Register::Register(JSFunction* function)
+    ALWAYS_INLINE Register& Register::operator=(JSFunction* function)
     {
         u.function = function;
+        return *this;
     }
 
-    ALWAYS_INLINE Register::Register(Instruction* vPC)
+    ALWAYS_INLINE Register& Register::operator=(Instruction* vPC)
     {
         u.vPC = vPC;
+        return *this;
     }
 
-    ALWAYS_INLINE Register::Register(ScopeChainNode* scopeChain)
+    ALWAYS_INLINE Register& Register::operator=(ScopeChainNode* scopeChain)
     {
         u.scopeChain = scopeChain;
+        return *this;
     }
 
-    ALWAYS_INLINE Register::Register(JSPropertyNameIterator* propertyNameIterator)
+    ALWAYS_INLINE Register& Register::operator=(JSPropertyNameIterator* propertyNameIterator)
     {
         u.propertyNameIterator = propertyNameIterator;
-    }
-
-    ALWAYS_INLINE Register::Register(int32_t i)
-    {
-        u.i = i;
+        return *this;
     }
 
     ALWAYS_INLINE int32_t Register::i() const
diff --git a/src/3rdparty/webkit/JavaScriptCore/interpreter/RegisterFile.cpp b/src/3rdparty/webkit/JavaScriptCore/interpreter/RegisterFile.cpp
index 5424199..510effe 100644
--- a/src/3rdparty/webkit/JavaScriptCore/interpreter/RegisterFile.cpp
+++ b/src/3rdparty/webkit/JavaScriptCore/interpreter/RegisterFile.cpp
@@ -36,7 +36,7 @@ RegisterFile::~RegisterFile()
 #if HAVE(MMAP)
     munmap(m_buffer, ((m_max - m_start) + m_maxGlobals) * sizeof(Register));
 #elif HAVE(VIRTUALALLOC)
-#if PLATFORM(WINCE)
+#if OS(WINCE)
     VirtualFree(m_buffer, DWORD(m_commitEnd) - DWORD(m_buffer), MEM_DECOMMIT);
 #endif
     VirtualFree(m_buffer, 0, MEM_RELEASE);
diff --git a/src/3rdparty/webkit/JavaScriptCore/interpreter/RegisterFile.h b/src/3rdparty/webkit/JavaScriptCore/interpreter/RegisterFile.h
index 953c70f..1fc4f82 100644
--- a/src/3rdparty/webkit/JavaScriptCore/interpreter/RegisterFile.h
+++ b/src/3rdparty/webkit/JavaScriptCore/interpreter/RegisterFile.h
@@ -176,7 +176,7 @@ namespace JSC {
     #if HAVE(MMAP)
         m_buffer = static_cast<Register*>(mmap(0, bufferLength, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, VM_TAG_FOR_REGISTERFILE_MEMORY, 0));
         if (m_buffer == MAP_FAILED) {
-#if PLATFORM(WINCE)
+#if OS(WINCE)
             fprintf(stderr, "Could not allocate register file: %d\n", GetLastError());
 #else
             fprintf(stderr, "Could not allocate register file: %d\n", errno);
@@ -186,7 +186,7 @@ namespace JSC {
     #elif HAVE(VIRTUALALLOC)
         m_buffer = static_cast<Register*>(VirtualAlloc(0, roundUpAllocationSize(bufferLength, commitSize), MEM_RESERVE, PAGE_READWRITE));
         if (!m_buffer) {
-#if PLATFORM(WINCE)
+#if OS(WINCE)
             fprintf(stderr, "Could not allocate register file: %d\n", GetLastError());
 #else
             fprintf(stderr, "Could not allocate register file: %d\n", errno);
@@ -196,7 +196,7 @@ namespace JSC {
         size_t committedSize = roundUpAllocationSize(maxGlobals * sizeof(Register), commitSize);
         void* commitCheck = VirtualAlloc(m_buffer, committedSize, MEM_COMMIT, PAGE_READWRITE);
         if (commitCheck != m_buffer) {
-#if PLATFORM(WINCE)
+#if OS(WINCE)
             fprintf(stderr, "Could not allocate register file: %d\n", GetLastError());
 #else
             fprintf(stderr, "Could not allocate register file: %d\n", errno);
@@ -242,7 +242,7 @@ namespace JSC {
         if (newEnd > m_commitEnd) {
             size_t size = roundUpAllocationSize(reinterpret_cast<char*>(newEnd) - reinterpret_cast<char*>(m_commitEnd), commitSize);
             if (!VirtualAlloc(m_commitEnd, size, MEM_COMMIT, PAGE_READWRITE)) {
-#if PLATFORM(WINCE)
+#if OS(WINCE)
                 fprintf(stderr, "Could not allocate register file: %d\n", GetLastError());
 #else
                 fprintf(stderr, "Could not allocate register file: %d\n", errno);