MICA counters for specific code block

Is it possible to make MICA/PIN to measure between A and B?

In the following example what would I have to do (in terms of code instrumentation or parameters passed to MICA) so that the MICA counters would only be incremented for CODE BLOCK 2?

int main() {

// CODE BLOCK 1
// start measuring
// CODE BLOCK 2
// end measurement
// CODE BLOCK 3

}