plugeth/tests/fuzzers
Marius van der Wijden 398182284c
tests/fuzzers/abi: better test generation (#22158)
* tests/fuzzers/abi: better test generation

* tests/fuzzers/abi: fixed packing issue

* oss-fuzz: enable abi fuzzer
2021-01-18 14:33:15 +01:00
..
abi tests/fuzzers/abi: better test generation (#22158) 2021-01-18 14:33:15 +01:00
bitutil tests/fuzzers: fix false positive in bitutil fuzzer (#22076) 2020-12-27 21:58:39 +01:00
bls12381 tests/fuzzers/bls1381: add bls fuzzer (#21796) 2020-11-23 15:49:16 +01:00
bn256 common,crypto: move fuzzers out of core (#22029) 2020-12-23 17:44:45 +01:00
difficulty consensus/ethash: implement faster difficulty calculators (#21976) 2020-12-11 11:06:44 +01:00
keystore tests/fuzzers: improve the fuzzers (#21829) 2020-11-13 12:36:38 +01:00
rangeproof core, eth: split eth package, implement snap protocol (#21482) 2020-12-14 10:27:15 +01:00
rlp tests/fuzzers: improve the fuzzers (#21829) 2020-11-13 12:36:38 +01:00
runtime common,crypto: move fuzzers out of core (#22029) 2020-12-23 17:44:45 +01:00
stacktrie tests/fuzzers: improve the fuzzers (#21829) 2020-11-13 12:36:38 +01:00
trie trie, tests/fuzzers: implement a stacktrie fuzzer + stacktrie fixes (#21799) 2020-11-09 15:08:12 +01:00
txfetcher tests/fuzzers: improve the fuzzers (#21829) 2020-11-13 12:36:38 +01:00
README.md all: fix typos in comments (#21118) 2020-05-25 10:21:28 +02:00

Fuzzers

To run a fuzzer locally, you need go-fuzz installed.

First build a fuzzing-binary out of the selected package:

(cd ./rlp && CGO_ENABLED=0 go-fuzz-build .)

That command should generate a rlp-fuzz.zip in the rlp/ directory. If you are already in that directory, you can do

[user@work rlp]$ go-fuzz
2019/11/26 13:36:54 workers: 6, corpus: 3 (3s ago), crashers: 0, restarts: 1/0, execs: 0 (0/sec), cover: 0, uptime: 3s
2019/11/26 13:36:57 workers: 6, corpus: 3 (6s ago), crashers: 0, restarts: 1/0, execs: 0 (0/sec), cover: 1054, uptime: 6s
2019/11/26 13:37:00 workers: 6, corpus: 3 (9s ago), crashers: 0, restarts: 1/8358, execs: 25074 (2786/sec), cover: 1054, uptime: 9s
2019/11/26 13:37:03 workers: 6, corpus: 3 (12s ago), crashers: 0, restarts: 1/8497, execs: 50986 (4249/sec), cover: 1054, uptime: 12s
2019/11/26 13:37:06 workers: 6, corpus: 3 (15s ago), crashers: 0, restarts: 1/9330, execs: 74640 (4976/sec), cover: 1054, uptime: 15s
2019/11/26 13:37:09 workers: 6, corpus: 3 (18s ago), crashers: 0, restarts: 1/9948, execs: 99482 (5527/sec), cover: 1054, uptime: 18s
2019/11/26 13:37:12 workers: 6, corpus: 3 (21s ago), crashers: 0, restarts: 1/9428, execs: 122568 (5836/sec), cover: 1054, uptime: 21s
2019/11/26 13:37:15 workers: 6, corpus: 3 (24s ago), crashers: 0, restarts: 1/9676, execs: 145152 (6048/sec), cover: 1054, uptime: 24s
2019/11/26 13:37:18 workers: 6, corpus: 3 (27s ago), crashers: 0, restarts: 1/9855, execs: 167538 (6205/sec), cover: 1054, uptime: 27s
2019/11/26 13:37:21 workers: 6, corpus: 3 (30s ago), crashers: 0, restarts: 1/9645, execs: 192901 (6430/sec), cover: 1054, uptime: 30s
2019/11/26 13:37:24 workers: 6, corpus: 3 (33s ago), crashers: 0, restarts: 1/9967, execs: 219294 (6645/sec), cover: 1054, uptime: 33s

Otherwise:

go-fuzz -bin ./rlp/rlp-fuzz.zip

Notes

Once a 'crasher' is found, the fuzzer tries to avoid reporting the same vector twice, so stores the fault in the suppressions folder. Thus, if you e.g. make changes to fix a bug, you should remove all data from the suppressions-folder, to verify that the issue is indeed resolved.

Also, if you have only one and the same exit-point for multiple different types of test, the suppression can make the fuzzer hide different types of errors. So make sure that each type of failure is unique (for an example, see the rlp fuzzer, where a counter i is used to differentiate between failures:

		if !bytes.Equal(input, output) {
			panic(fmt.Sprintf("case %d: encode-decode is not equal, \ninput : %x\noutput: %x", i, input, output))
		}