On Sun, May 06, 2012 at 11:27:27AM +0100, Richard W.M. Jones wrote: > I wrote something similar a while back, trying to use systemtap to do > feedback-directed fuzz testing. By putting a tracepoint on every line > in the filesystem module, you can find out how many lines of code are > actually executed when mounting/using the fuzzed filesystem and use > that as a cost function for feedback (maximizing the # of lines > executed, rather than blindly fuzzing). Unfortunately it doesn't work > yet because of a bug in Linux[1]. I guess something like that could also be used for trying to generate a small(ish) set of test case filesystem images that maximally exercise the code. > Anyway I was going to say: why not use libguestfs to provide a simpler > framework for running KVM and the fuzzer? I didn't even know about libguestfs. Very interesting; I need to take a closer look at it. I'd be glad quite glad if I could somehow get rid of the root filesystem image, or to build and update it automatically. Right now it's a headache for version control purposes. Sami
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