Here is another question about the opreport result:

Let's say I have a shared library called, and here is the result generated from opreport.
As you can see, opreport did pickup the symbols from inside of, but why the one on the second line is showing as anonymous symbol from
Is it saying is calling some other library code that it doesn't know about? Will it be possible to find out which api inside is making the outside library call?

  9         0.2851           Flow::IsDying() const
  7         0.2217           anonymous symbol from section .plt
  7         0.2217           PtrId::PtrId()