private void Log(OverflowType overflowType, UInt64 memStart, UInt64 memEnd, UInt64 size, InstructionDescription insn, IList<UInt64> bt, AnalyzeController ctrl)
 {
     XmlElement root = GenerateNode ("simple_heap_overflow");
     XmlHelper.WriteString (root, "OverflowType", overflowType.ToString());
     XmlHelper.WriteString (root, "MemStart", string.Format ("0x{0:X}", memStart));
     XmlHelper.WriteString (root, "MemEnd", string.Format ("0x{0:X}", memEnd));
     XmlHelper.WriteString (root, "Size", size.ToString());
     XmlHelper.WriteString (root, "At", BuildBacktraceString(bt));
 }