Remove type_overrides

UVM
,
1

I want to do something like this in my sequence


virtual task body();
t1;
t2;
endtask

task t1();
typeA:::type_id::set_type_override(typeB::get_type(),1) // Override trans item typeA with typeB
endtask

task t2();
typeB:::type_id::set_type_override(typeA::get_type(),1) // Revert the override. Override typeB with typeA
endtask

When I run the code, it gives an error “Recursive loop detected while finding override” during sim

2

What you need to do is replace the original override of typeA back to typeA. Your task t2 just creates another override with replacing the existing one.

typeA:::type_id::set_type_override(typeA::get_type(),1) // Override trans item typeA with typeA

P.S.A.: usefunction void instead of task for non-time consuming subroutines.

3

In reply to dave_59:

It gives a warning “Original and override type arguments are identical:typeA” and when I do factory.print() after this override, it prints the following

Type Overrides:
Requested Type Override Type

typeA typeB

4

In reply to sridar:

Apparently, this is a bug that was fixed in UVM 1.2 (You’ll still get warning messages)

Instead of using overrides, the uvm_factory’s create_object_by_type() method and use a config_db setting to select the actual type.