AFL performs various checks, e.g., cpu frequence scaling,
core file patterns, binary transformed for afl.

For testing, ignore all these.

When name of function is specified as entry point for fork server,
pre-insert the fork server init code at the last instruction of the
first basic block in the function.

One version returns a value. STARS is able to find a dead reg.
2nd func if void. STARS finds no dead regs.