hello,
For each field macro defined, another large block of code is added to the middle of the internal__m_uvm_field_automation() method, and each block of code includes multiple calls to other methods within a __m_uvm_status_container class, so if there are ever any problems related to the field macros, the debugging task is extremely verbose and complex. Fortunately, the field macros work properly most of the time, but when they don’t work, debugging is time-consuming and extremely frustrating.
Anyone can explain when field macro not work? and how?
UVM field macros may fail due to incorrect object registration, mismatched data types, or improper factory overrides cause runtime errors or unexpected behavior. Issues can also arise from complex hierarchical configurations or missing uvm_component_utils registration. Mainly null object references or incorrect field values during simulation. Thoroughly checking macro usage, factory settings, and hierarchy can help identify issues.
Hi Surya,
I noticed that all the other issues except for “mismatched data types” don’t seem to be related to problems specific to UVM field macros. Could you please elaborate on what the issues are?
Hi Dave,
Using the Wrong Field Macro for the Data Type.
ex:
uvm_field_int: For integral types (int, bit, logic).
uvm_field_string: For string types.
UVM field macros support the limited set of data types (for ex: scalars, strings, UVM objects, arrays). like structs, unions, or non UVM classes are not supported.
Mismatched types was the only exception. Could you please explain how you identified the other issues? They don’t make sense to me without an explanation.
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