3 files changed, 9 insertions, 4 deletions
diff --git a/Source/JavaScriptCore/interpreter/CallFrame.h b/Source/JavaScriptCore/interpreter/CallFrame.h
index e0a291f8b..4fadfab28 100644
--- a/Source/JavaScriptCore/interpreter/CallFrame.h
+++ b/Source/JavaScriptCore/interpreter/CallFrame.h
@@ -106,6 +106,8 @@ namespace JSC  {
         ReturnAddressPtr returnPC() const { return ReturnAddressPtr(this[RegisterFile::ReturnPC].vPC()); }
 #endif
         AbstractPC abstractReturnPC(JSGlobalData& globalData) { return AbstractPC(globalData, this); }
+        unsigned bytecodeOffsetForBaselineJIT() { return this[RegisterFile::ArgumentCount].tag(); }
+
 #if ENABLE(DFG_JIT)
         InlineCallFrame* inlineCallFrame() const { return this[RegisterFile::ReturnPC].asInlineCallFrame(); }
         unsigned codeOriginIndexForDFGWithInlining() const { return this[RegisterFile::ArgumentCount].tag(); }
diff --git a/Source/JavaScriptCore/interpreter/Interpreter.cpp b/Source/JavaScriptCore/interpreter/Interpreter.cpp
index 51843f2d2..d42e869f1 100644
--- a/Source/JavaScriptCore/interpreter/Interpreter.cpp
+++ b/Source/JavaScriptCore/interpreter/Interpreter.cpp
@@ -885,6 +885,8 @@ JSValue Interpreter::execute(ProgramExecutable* program, CallFrame* callFrame, S
     Vector<JSONPData> JSONPData;
     bool parseResult;
     const UString programSource = program->source().toString();
+    if (programSource.isNull())
+        return jsUndefined();
     if (programSource.is8Bit()) {
         LiteralParser<LChar> literalParser(callFrame, programSource.characters8(), programSource.length(), JSONP);
         parseResult = literalParser.tryJSONPParse(JSONPData, scopeChain->globalObject->globalObjectMethodTable()->supportsRichSourceInfo(scopeChain->globalObject.get()));
@@ -5126,11 +5128,12 @@ JSValue Interpreter::retrieveCallerFromVMCode(CallFrame* callFrame, JSFunction*
     CallFrame* functionCallFrame = findFunctionCallFrameFromVMCode(callFrame, function);
     if (!functionCallFrame)
         return jsNull();
-
-    CallFrame* callerFrame = functionCallFrame->callerFrame();
-    if (callerFrame->hasHostCallFrameFlag())
+    
+    if (functionCallFrame->callerFrame()->hasHostCallFrameFlag())
         return jsNull();
 
+    CallFrame* callerFrame = functionCallFrame->trueCallerFrame();
+
     JSValue caller = callerFrame->callee();
     if (!caller)
         return jsNull();
diff --git a/Source/JavaScriptCore/interpreter/Interpreter.h b/Source/JavaScriptCore/interpreter/Interpreter.h
index 1943513ae..884c4248e 100644
--- a/Source/JavaScriptCore/interpreter/Interpreter.h
+++ b/Source/JavaScriptCore/interpreter/Interpreter.h
@@ -142,7 +142,7 @@ namespace JSC {
         JSValue execute(EvalExecutable*, CallFrame*, JSValue thisValue, ScopeChainNode*, int globalRegisterOffset);
 
         JSValue retrieveArgumentsFromVMCode(CallFrame*, JSFunction*) const;
-        JS_EXPORT_PRIVATE JSValue retrieveCallerFromVMCode(CallFrame*, JSFunction*) const;
+        JSValue retrieveCallerFromVMCode(CallFrame*, JSFunction*) const;
         JS_EXPORT_PRIVATE void retrieveLastCaller(CallFrame*, int& lineNumber, intptr_t& sourceID, UString& sourceURL, JSValue& function) const;
         
         void getArgumentsData(CallFrame*, JSFunction*&, ptrdiff_t& firstParameterIndex, Register*& argv, int& argc);