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philip
2016-08-25 08:13:06 -04:00
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FUZZING.md
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@ -27,3 +27,21 @@ afl-fuzz -i afltests -o findings ./build/linux_spiffs_test -f afl_test
This run will take hours (or days) and will (hopefully) not find any crashes.
If a crash (or hang) is found, then the input file that caused the crash is
saved. This allows the specific test case to be debugged.
## Reducing the size of the file
AFL comes with `afl-tmin` which can reduce the size of the test input file to
make it easier to debug.
```
afl-tmin -i findings/crashes/<somefile> -o smalltest -- build/linux_spiffs_test -f afl_test
```
This will write a short version of the testcase file to `smalltest`. This can then be
fed into the test program for debugging:
```
build/linux_spiffs_test -f afl_test < smalltest
```
This should still crash, but allows it to be run under a debugger.