On Fri, Aug 25, 2017 at 6:37 PM, Andrew Cooper <andrew.coop...@citrix.com> wrote: > On 25/08/17 17:43, George Dunlap wrote: >> You don't need __AFL_INIT if you have __AFL_LOOP. >> >> Signed-off-by: George Dunlap <george.dun...@citrix.com> > > Really? Is that covered in any documentation? > > I got the contrary impression from whichever version of AFL I was using > when I put this in, and a quick look over the afl-fuzz source doesn't > appear to equate them in any way.
Trying to answer the feof() question, I dug into llvm mode a bit more. They are independent features but they can be used together: that is, if you compile with afl-clang-fast, you always get a forkserver. If you specify the location with __AFL_INIT, that's where the forkserver get started; otherwise, it's somewhere before main() is called. When __AFL_LOOP(N) is present, it will execute the loop N times before calling exit(); at which point, the forkserver will fork another instance (either before main(), or at __AFL_INIT). So you don't *need* __AFL_INIT; and the amount of time it will save isn't much (the initialization every 1000 iterations), but I suppose we might as well keep it. -George _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org https://lists.xen.org/xen-devel
