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- Question: set_type_override_by_type is not override the object throughout the UVM code
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set_type_override_by_type is not override the object throughout the UVM code
set_type_override_by_type method in UVM is used to override the default factory behavior for a specific class or a group of classes that share a common base class. When you use
set_type_override_by_type, you specify a base class and a replacement class, and any subsequent calls to the factory to create an object of the base class or any of its derived classes will create an object of the replacement class instead.
set_type_override_by_type is not overriding the object throughout the UVM code, there could be several reasons:
Incorrect usage: Ensure that you are using
set_type_override_by_typecorrectly. Check that you are passing the correct base and replacement classes to the method, and that the method is being called at the correct time in the UVM lifecycle.
Timing issues: If you are calling
set_type_override_by_typeafter an object has already been created, it will not have any effect on that object. Make sure you call the method before the object is created.
Multiple factory instances: If you are using multiple factory instances in your UVM code, make sure you are calling
set_type_override_by_typeon the correct factory instance. The factory instance used to create an object determines which overrides are applied.
Inheritance hierarchy: If your object’s class hierarchy is not consistent with the hierarchy you specified when calling
set_type_override_by_type, the override may not take effect. Make sure that the base and replacement classes are correctly specified for all classes in the inheritance hierarchy.
Other overrides: If there are other type overrides in your UVM code that conflict with the override you are trying to set, it may not take effect. Check that there are no other overrides that could be interfering with the desired behavior.
If none of these solutions work, you may need to provide more information about your specific use case and code to determine the root cause of the issue.
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What is Set_type_override_by_name in UVM?
set_type_override_by_name() is a function provided by the Universal Verification Methodology (UVM) library in SystemVerilog, which is used to override the default factory configuration for a particular component or interface based on its hierarchical name.
In UVM, the factory is used to create objects dynamically at run time and it is responsible for configuring objects with default values based on their type. Sometimes, these default values may not be appropriate for a specific component or interface, and they need to be customized based on their hierarchical name.
set_type_override_by_name() function allows you to override the default factory configuration for a specific component or interface based on its hierarchical name. You can use this function to specify a new type and/or configuration object to be used instead of the default one for a specific component or interface.
Here’s an example of using
// Assume we have a component named "my_agent" // and we want to override its default configuration class my_agent extends uvm_agent; // ... endclass // Override the default factory configuration for "my_agent" // based on its hierarchical name factory.set_type_override_by_name("env.top_env.my_agent", my_agent::type_id::get()); // Create an instance of "my_agent" using the new configuration my_agent my_agent_inst; uvm_config_db#(uvm_object_wrapper)::set(null, "env.top_env.my_agent", "config", my_custom_config::type_id::get()); my_agent_inst = my_agent::type_id::create("my_agent_inst", env);
In the above example,
set_type_override_by_name() is used to override the default factory configuration for the
my_agent component based on its hierarchical name, which is
env.top_env.my_agent. The new configuration specifies that the type of the component should be
my_agent, which is a user-defined class.
After the type override is set, an instance of
my_agent is created using the
create() function provided by the factory. The new configuration is then applied to the instance using the
set() function provided by the
uvm_config_db class, which is used to store and retrieve configuration information at run time.
What is the difference between Get_type and Get_type_name in UVM?
In UVM (Universal Verification Methodology),
get_type_name() are methods used to get information about the type of an object.
get_type() is a method of the
uvm_object class, which returns the type handle of an object. The type handle represents the actual type of the object and can be used to perform operations such as casting and introspection.
get_type_name() is a method of the
uvm_object class, which returns a string representation of the type name of an object. The type name is a human-readable name that is used to identify the type of the object and is often used for debugging and reporting purposes.
get_type() returns a type handle which is used for casting and introspection, while
get_type_name() returns a string representation of the type name which is used for identification and reporting purposes.
What is Get_type () in UVM?
get_type() is a built-in function in the Universal Verification Methodology (UVM) library that is used to retrieve the type of a given object. It is defined in the
uvm_object class, which is the base class for all user-defined classes in UVM.
The syntax for
get_type() is as follows:
type_id = obj.get_type();
obj is the object for which the type needs to be retrieved, and
type_id is a
uvm_type_id handle that represents the type of the object.
get_type() is a useful function in UVM because it allows users to perform runtime type checking and introspection on objects. For example, it can be used to determine whether an object is of a certain type before casting it to a specific subclass, or to print out information about an object’s type at runtime.
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