Fix one more auxPtrs accessed from background thread

lib/Runtime/Base/FunctionBody.h

@@ -2002,6 +2002,7 @@ namespace Js
         ByteBlock* GetAuxiliaryDataWithLock() const { return static_cast<ByteBlock*>(this->GetAuxPtrWithLock(AuxPointerType::AuxBlock)); }
         void SetAuxiliaryData(ByteBlock* auxBlock) { this->SetAuxPtr(AuxPointerType::AuxBlock, auxBlock); }
         ByteBlock* GetAuxiliaryContextData()const { return static_cast<ByteBlock*>(this->GetAuxPtr(AuxPointerType::AuxContextBlock)); }
+        ByteBlock* GetAuxiliaryContextDataWithLock()const { return static_cast<ByteBlock*>(this->GetAuxPtrWithLock(AuxPointerType::AuxContextBlock)); }
         void SetAuxiliaryContextData(ByteBlock* auxContextBlock) { this->SetAuxPtr(AuxPointerType::AuxContextBlock, auxContextBlock); }
         ByteBlock* GetByteCode();
         ByteBlock* GetOriginalByteCode(); // Returns original bytecode without probes (such as BPs).

lib/Runtime/ByteCode/ByteCodeReader.cpp

@@ -267,8 +267,17 @@ namespace Js
 
     const Js::VarArrayVarCount * ByteCodeReader::ReadVarArrayVarCount(uint offset, FunctionBody * functionBody)
     {
-        Js::VarArrayVarCount const * varArray = (Js::VarArrayVarCount const *)(functionBody->GetAuxiliaryContextData()->GetBuffer() + offset);
-        Assert(offset + varArray->GetDataSize() <= functionBody->GetAuxiliaryContextData()->GetLength());
+        Js::ByteBlock* auxiliaryContextData = functionBody->GetAuxiliaryContextData();
+        Js::VarArrayVarCount const * varArray = (Js::VarArrayVarCount const *)(auxiliaryContextData->GetBuffer() + offset);
+        Assert(offset + varArray->GetDataSize() <= auxiliaryContextData->GetLength());
+        return varArray;
+    }
+
+    const Js::VarArrayVarCount * ByteCodeReader::ReadVarArrayVarCountWithLock(uint offset, FunctionBody * functionBody)
+    {
+        Js::ByteBlock* auxiliaryContextData = functionBody->GetAuxiliaryContextDataWithLock();
+        Js::VarArrayVarCount const * varArray = (Js::VarArrayVarCount const *)(auxiliaryContextData->GetBuffer() + offset);
+        Assert(offset + varArray->GetDataSize() <= auxiliaryContextData->GetLength());
         return varArray;
     }
 

lib/Runtime/ByteCode/ByteCodeReader.h

@@ -67,6 +67,7 @@ namespace Js
         static PropertyIdArray const * ReadPropertyIdArray(uint offset, FunctionBody * functionBody, uint extraSlots = 0);
         static PropertyIdArray const * ReadPropertyIdArrayWithLock(uint offset, FunctionBody * functionBody, uint extraSlots = 0);
         static VarArrayVarCount const * ReadVarArrayVarCount(uint offset, FunctionBody * functionBody);
+        static VarArrayVarCount const * ReadVarArrayVarCountWithLock(uint offset, FunctionBody * functionBody);
 
         const byte* GetIP();
         void SetIP(const byte *const ip);