plugeth/tests/fuzzers
Martin Holst Swende 15b7e0b254
common/math, tests/fuzzers: use big.Int clone (#26006)
* common/math, tests/fuzzers: use big.Int clone

* common/math: license
2022-10-18 15:42:16 +02:00
..
abi all: replace uses of ioutil with io and os (#24869) 2022-05-16 11:59:35 +02:00
bitutil tests/fuzzers: fix false positive in bitutil fuzzer (#22076) 2020-12-27 21:58:39 +01:00
bls12381 build: upgrade to go 1.19 (#25726) 2022-09-10 13:25:40 +02:00
bn256 all: update license headers and AUTHORS from git history (#24947) 2022-05-24 20:39:40 +02:00
difficulty all: fix docstrings 2022-10-04 09:18:02 +02:00
keystore tests/fuzzers: improve the fuzzers (#21829) 2020-11-13 12:36:38 +01:00
les all: cleanup tests (#25641) 2022-09-07 20:21:59 +02:00
modexp common/math, tests/fuzzers: use big.Int clone (#26006) 2022-10-18 15:42:16 +02:00
rangeproof all: fix spelling mistakes (#25961) 2022-10-11 09:37:00 +02:00
rlp tests/fuzzers/rlp: avoid very large input (#25109) 2022-06-17 00:44:30 +02:00
runtime all: fix spelling mistakes (#25961) 2022-10-11 09:37:00 +02:00
secp256k1 all: update license headers and AUTHORS from git history (#24947) 2022-05-24 20:39:40 +02:00
snap all: cleanup tests (#25641) 2022-09-07 20:21:59 +02:00
stacktrie all: fix docstrings 2022-10-04 09:18:02 +02:00
trie all: fix docstrings 2022-10-04 09:18:02 +02:00
txfetcher tests/fuzzers: improve the fuzzers (#21829) 2020-11-13 12:36:38 +01:00
vflux all: replace uses of ioutil with io and os (#24869) 2022-05-16 11:59:35 +02:00
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))
		}