import sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal; //导入依赖的package包/类
private void setupDebuggerDarwin() {
    setupJVMLibNamesDarwin();

    if (cpu.equals("amd64") || cpu.equals("x86_64")) {
        machDesc = new MachineDescriptionAMD64();
    } else {
        throw new DebuggerException("Darwin only supported on x86_64. Current arch: " + cpu);
    }

    BsdDebuggerLocal dbg = new BsdDebuggerLocal(machDesc, !isServer);
    debugger = dbg;

    attachDebugger();
}
 

import sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal; //导入依赖的package包/类
public    ThreadProxy getThreadProxy(Address addr) {
  // Addr is the address of the JavaThread.
  // Fetch the OSThread (for now and for simplicity, not making a
  // separate "OSThread" class in this package)
  Address osThreadAddr = osThreadField.getValue(addr);
  // Get the address of the _thread_id from the OSThread
  Address threadIdAddr = osThreadAddr.addOffsetTo(osThreadThreadIDField.getOffset());
  Address uniqueThreadIdAddr = osThreadAddr.addOffsetTo(osThreadUniqueThreadIDField.getOffset());

  BsdDebuggerLocal debugger = (BsdDebuggerLocal) VM.getVM().getDebugger();
  return debugger.getThreadForIdentifierAddress(threadIdAddr, uniqueThreadIdAddr);
}