uvm中的starting_phase的源代码

以下是UVM中的starting_phase阶段的源代码：

class uvm_top extends uvm_component;
  `uvm_component_utils(uvm_top)
  
  function void build_phase(uvm_phase phase);
    super.build_phase(phase);
    // Create and configure the DUT
    dut = dut_type::type_id::create("dut", this);
    if(dut is null)
      `uvm_fatal("DUT_CREATION", "Failed to create DUT instance")
    dut.configure(this);
  endfunction : build_phase
  
  function void connect_phase(uvm_phase phase);
    dut.build();
    super.connect_phase(phase);
  endfunction : connect_phase
  
  function void end_of_elaboration_phase(uvm_phase phase);
    super.end_of_elaboration_phase(phase);
    // Set the DUT's top-level parent to this component
    dut.set_parent(this);
  endfunction : end_of_elaboration_phase
  
  function void starting_phase(uvm_phase phase);
    super.starting_phase(phase);
    // Start the DUT's main thread
    dut.start_main_thread();
  endfunction : starting_phase

  // ...
endclass : uvm_top

在这里，`uvm_top`是一个UVM组件，它继承自`uvm_component`。`starting_phase`函数定义了在该阶段执行的操作。在该函数中，我们调用了`dut.start_main_thread()`方法，该方法启动DUT的主线程。此外，`super.starting_phase(phase)`也被调用，以确保在该阶段的所有父组件中都执行了必要的操作。