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Updated Fuzzing your nim code to rabbit out all the hard bugs (markdown)

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Federico Ceratto 2017-01-20 20:37:00 +00:00
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Fuzzing-your-nim-code-to-rabbit-out-all-the-hard-bugs.md
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@ -127,3 +127,26 @@ You can limit the exceptions that are considered crashes by adjusting the except
Then I'd strongly suggest to start reading up on afl if you want to employ it with confidence. Then I'd strongly suggest to start reading up on afl if you want to employ it with confidence.
## Testing for bugs in your code
By default AFL will identify segfaults and such but not vulnerabilities in your code. You can add extra assertions to be run only during the AFL test with:
```nim
when defined(macosx) or defined(linux) or defined(freebsd) or
defined(openbsd) or defined(netbsd) or defined(solaris):
import posix
template AFLAssert*(cond: bool) =
when defined(afl):
if not cond:
echo "Failed AFL assertion: " & astToStr(cond)
let pid = posix.getpid()
discard posix.kill(pid, posix.SIGABRT)
```
Also add `-d:afl` to your nim.cfg to enable this.