Verification of processor and chip content


How can the user verify the contents of the processor and the chips?

Is the processor itself built following only a open hardware design (and not just the ISA that is open)?
Would there also be possible to examine content of the processor (ensure no malicious code, backdoors etc present)?
Possible to open the chips and examine the contents without ruining the chip?

Best regards,

This is not possible today. The closest technique I know of is described here:

Thank you for your answer!