EncodeJSONCommon contains some common logic for the debug trace, like disabling EscapeHTML and recording error.

EnterContextCommon records the function name of the caller, then creates and enter a new context for this debug trace structure.

GetOrInitDebugTraceRoot returns the debug trace root.

LeaveContextCommon makes the debug trace goes to its parent context.

RecordAnyValuesWithNames is a general debug trace logic for recording some values of any type with a name.

OptimizerDebugTraceRoot is for recording the optimizer debug trace.