Implementing Self-Attach After Java 9

Allow self attachment (Attach Self): In Java 9 and later versions, processes are not allowed to attach themselves by default, and the code bypasses this restriction by modifying the JVM internal flag bits.Permit.godMode();
Field AttachSelfEnabledFlag = Class.forName("sun.tools.attach.HotSpotVirtualMachine").getDeclaredField("ALLOW_ATTACH_SELF");

This method modifies the internal JVMALLOW_ATTACH_SELFFlag bit that allows the process to attach itself.

• Permit.godMode():usePermitLibrary bypasses Java access control.

• Reflection operation：