diff --git a/docs/src/DEBUGGING.md b/docs/src/DEBUGGING.md index 59878c077f..4b859fc38f 100644 --- a/docs/src/DEBUGGING.md +++ b/docs/src/DEBUGGING.md @@ -19,4 +19,7 @@ First, verify that your stdout and stderr are not redirected to `/dev/null`. If Try running the fuzzer with the `introspection` feature of the `libafl`. This will show how much time is spent on each module of your fuzzer. ## Q. I still have problems with my fuzzer. -Finally, if you really have no idea what is going on, run your fuzzer with logging enabled. (You can use `env_logger`, `SimpleStdoutLogger`, `SimpleStderrLogger` from `libafl_bolts`. `fuzzbench_text` has an example to show how to use it.) (Don't forget to enable stdout and stderr), and you can open an issue or ask us in Discord. \ No newline at end of file +Finally, if you really have no idea what is going on, run your fuzzer with logging enabled. (You can use `env_logger`, `SimpleStdoutLogger`, `SimpleStderrLogger` from `libafl_bolts`. `fuzzbench_text` has an example to show how to use it.) (Don't forget to enable stdout and stderr), and you can open an issue or ask us in Discord. + +## My fuzzer died of `Fuzzer-respawner: Storing state in crashed fuzzer instance did not work, no point to spawn the next client! This can happen if the child calls `exit()`, in that case make sure it uses `abort()`, if it got killed unrecoverable (OOM), or if there is a bug in the fuzzer itself. (Child exited with: 0)`. +If the exit code is zero, then this is because either your harness exited or you are using fuzzer_loop_for and forgot to add `mgr.on_restart` at the end of the fuzzer. In the first case, you should patch your harness not to exit. (or use `utils/deexit`).