1. A computer implemented method for marking instructions for instrumentation, the computer implemented method comprising: presenting a plurality of instructions in a graphical user interface; receiving a user input selecting a set of instructions in the plurality of instructions for instrumentation through the graphical user interface; and responsive to receiving the user input, marking the set of instructions as a set of instrumentation instructions, wherein the set of instructions are executed by a processor if the processor is in an instrumentation mode and wherein the instrumentation instructions are unexecuted if an absence of the processor being in the instrumentation mode is present.