Merge pull request #945 from msiebuhr/fuzz

Fuzz parsers

promql/fuzz-data/ParseExpr/corpus/from_tests_1

+1

promql/fuzz-data/ParseExpr/corpus/from_tests_10

+0755

promql/fuzz-data/ParseExpr/corpus/from_tests_11

++5.5e-3

promql/fuzz-data/ParseExpr/corpus/from_tests_12

+-0755

promql/fuzz-data/ParseExpr/corpus/from_tests_13

+1 + 1

promql/fuzz-data/ParseExpr/corpus/from_tests_14

+1 - 1

promql/fuzz-data/ParseExpr/corpus/from_tests_15

+1 * 1

promql/fuzz-data/ParseExpr/corpus/from_tests_16

+1 % 1

promql/fuzz-data/ParseExpr/corpus/from_tests_17

+1 / 1

promql/fuzz-data/ParseExpr/corpus/from_tests_18

+1 == 1

promql/fuzz-data/ParseExpr/corpus/from_tests_19

+1 != 1

promql/fuzz-data/ParseExpr/corpus/from_tests_2

++Inf

promql/fuzz-data/ParseExpr/corpus/from_tests_20

+1 > 1

promql/fuzz-data/ParseExpr/corpus/from_tests_21

+1 >= 1

promql/fuzz-data/ParseExpr/corpus/from_tests_22

+1 < 1

promql/fuzz-data/ParseExpr/corpus/from_tests_23

+1 <= 1

promql/fuzz-data/ParseExpr/corpus/from_tests_24

++1 + -2 * 1

promql/fuzz-data/ParseExpr/corpus/from_tests_25

+1 + 2/(3*1)

promql/fuzz-data/ParseExpr/corpus/from_tests_26

+

promql/fuzz-data/ParseExpr/corpus/from_tests_27

+#comment

promql/fuzz-data/ParseExpr/corpus/from_tests_28

+foo * bar

promql/fuzz-data/ParseExpr/corpus/from_tests_29

+foo == 1

promql/fuzz-data/ParseExpr/corpus/from_tests_3

+-Inf

promql/fuzz-data/ParseExpr/corpus/from_tests_30

+2.5 / bar

promql/fuzz-data/ParseExpr/corpus/from_tests_31

+foo and bar

promql/fuzz-data/ParseExpr/corpus/from_tests_32

+foo or bar

promql/fuzz-data/ParseExpr/corpus/from_tests_33

+foo + bar or bla and blub

promql/fuzz-data/ParseExpr/corpus/from_tests_34

+bar + on(foo) bla / on(baz, buz) group_right(test) blub

promql/fuzz-data/ParseExpr/corpus/from_tests_4

+.5

promql/fuzz-data/ParseExpr/corpus/from_tests_5

+5.

promql/fuzz-data/ParseExpr/corpus/from_tests_6

+123.4567

promql/fuzz-data/ParseExpr/corpus/from_tests_7

+5e-3

promql/fuzz-data/ParseExpr/corpus/from_tests_8

+5e3

promql/fuzz-data/ParseExpr/corpus/from_tests_9

+0xc

promql/fuzz-data/ParseMetric/corpus/exposition_formats_0

+# HELP api_http_request_count The total number of HTTP requests.
+# TYPE api_http_request_count counter
+http_request_count{method="post",code="200"} 1027 1395066363000

promql/fuzz-data/ParseMetric/corpus/exposition_formats_1

+msdos_file_access_time_ms{path="C:\\DIR\\FILE.TXT",error="Cannot find file:\n\"FILE.TXT\""} 1.234e3

promql/fuzz-data/ParseMetric/corpus/exposition_formats_2

+metric_without_timestamp_and_labels 12.47

promql/fuzz-data/ParseMetric/corpus/exposition_formats_3

+something_weird{problem="division by zero"} +Inf -3982045

promql/fuzz-data/ParseMetric/corpus/exposition_formats_4

+http_request_duration_seconds_bucket{le="+Inf"} 144320

promql/fuzz.go

+// Copyright 2015 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Only build when go-fuzz is in use
+// +build gofuzz
+
+package promql
+
+// PromQL parser fuzzing instrumentation for use with
+// https://github.com/dvyukov/go-fuzz.
+//
+// Fuzz each parser by building appropriately instrumented parser, ex.
+// FuzzParseMetric and execute it with it's
+//
+//     go-fuzz-build -func FuzzParseMetric -o FuzzParseMetric.zip github.com/prometheus/prometheus/promql
+//
+// And then run the tests with the appropriate inputs
+//
+//     go-fuzz -bin FuzzParseMetric.zip -workdir fuzz-data/ParseMetric
+//
+// Further input samples should go in the folders fuzz-data/ParseMetric/corpus.
+//
+// Repeat for ParseMetricSeletion, ParseExpr and ParseStmt.
+
+// Tuning which value is returned from Fuzz*-functions has a strong influence
+// on how quick the fuzzer converges on "interesting" cases. At least try
+// switching between fuzzMeh (= included in corpus, but not a priority) and
+// fuzzDiscard (=don't use this input for re-building later inputs) when
+// experimenting.
+const (
+	fuzzInteresting = 1
+	fuzzMeh         = 0
+	fuzzDiscard     = -1
+)
+
+// Fuzz the metric parser.
+//
+// Note that his is not the parser for the text-based exposition-format; that
+// lives in github.com/prometheus/client_golang/text.
+func FuzzParseMetric(in []byte) int {
+	_, err := ParseMetric(string(in))
+	if err == nil {
+		return fuzzInteresting
+	}
+
+	return fuzzMeh
+}
+
+// Fuzz the metric selector parser.
+func FuzzParseMetricSelector(in []byte) int {
+	_, err := ParseMetricSelector(string(in))
+	if err == nil {
+		return fuzzInteresting
+	}
+
+	return fuzzMeh
+}
+
+// Fuzz the expression parser.
+func FuzzParseExpr(in []byte) int {
+	_, err := ParseExpr(string(in))
+	if err == nil {
+		return fuzzInteresting
+	}
+
+	return fuzzMeh
+}
+
+// Fuzz the parser.
+func FuzzParseStmts(in []byte) int {
+	_, err := ParseStmts(string(in))
+	if err == nil {
+		return fuzzInteresting
+	}
+
+	return fuzzMeh
+}