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| ## cmd/fzgen | ||
|
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| See the project [README](https://github.com/thepudds/fzgo/) for more details. |
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| package main | ||
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| import ( | ||
| "os" | ||
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| gen "github.com/thepudds/fzgen/gen" | ||
| ) | ||
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| func main() { | ||
| os.Exit(gen.FzgenMain()) | ||
| } |
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| // Package argexample shows an example that would take longer to | ||
| // to panic simply using dvyukov/go-fuzz or 'go test -fuzz=.', | ||
| // but which should panic in 20-30 sec or so via fz.Chain | ||
| // when fz.Chain is properly reusing input arg values from a step | ||
| // as candidate input values to another step (currently | ||
| // just a few seconds with GODEBUG=fuzzseed=1, vs. 2-3 minutes for | ||
| // cmd/go fuzzing without arg reuse). | ||
| // | ||
| // To panic, this example has three requirements: | ||
| // 1. Step1 must be called. | ||
| // 2. Step2 must be subsequently called. | ||
| // 3. The two args passed to Step2 must match the first arg of Step1. | ||
| // | ||
| // fz.Chain usually solves this by wiring the one of the args to Step1 to the inputs to Step2. | ||
| // | ||
| // The intent is that this example is run sequentially (that is, not with concurrent steps). | ||
| // | ||
| // (go-fuzz and cmd/go fuzzing can solve this many ways, including by copying | ||
| // bytes, or picking same interesting values in the right spots, etc.). | ||
| package argexample | ||
|
|
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| type PanicOnArgReuse struct { | ||
| rememberedInt int64 | ||
| passedStep1 bool | ||
| } | ||
|
|
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| func New(i int) *PanicOnArgReuse { | ||
| return &PanicOnArgReuse{} | ||
| } | ||
|
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| func (p *PanicOnArgReuse) Step1(a, b int64) { | ||
| // zero value is too easy, as are repeating values. | ||
| if a != b && a != 0 && b != 0 { | ||
| p.rememberedInt = a | ||
| p.passedStep1 = true | ||
| } | ||
| } | ||
|
|
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| func (p *PanicOnArgReuse) Step2(a, b int64) { | ||
| // TODO: fuzzer should reuse args beyond first arg, and then change this to b == p.rememberedB | ||
| if a == p.rememberedInt && b == p.rememberedInt && p.passedStep1 { | ||
| panic("bingo - found our desired panic") | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,15 @@ | ||
| module github.com/thepudds/fzgen/examples/inputs/race-xsync-map | ||
|
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| go 1.17 | ||
|
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||
| require ( | ||
| github.com/puzpuzpuz/xsync v1.0.1-0.20210823092703-32778049b5f5 | ||
| github.com/thepudds/fzgen v0.0.0-00010101000000-000000000000 | ||
| ) | ||
|
|
||
| require ( | ||
| github.com/google/gofuzz v1.2.0 // indirect | ||
| github.com/sanity-io/litter v1.5.1 // indirect | ||
| ) | ||
|
|
||
| replace github.com/thepudds/fzgen => ./../../.. |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| github.com/davecgh/go-spew v0.0.0-20161028175848-04cdfd42973b/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= | ||
| github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= | ||
| github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= | ||
| github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ= | ||
| github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= | ||
| github.com/google/gofuzz v1.2.0 h1:xRy4A+RhZaiKjJ1bPfwQ8sedCA+YS2YcCHW6ec7JMi0= | ||
| github.com/google/gofuzz v1.2.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg= | ||
| github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo= | ||
| github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ= | ||
| github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI= | ||
| github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA= | ||
| github.com/pmezard/go-difflib v0.0.0-20151028094244-d8ed2627bdf0 h1:GD+A8+e+wFkqje55/2fOVnZPkoDIu1VooBWfNrnY8Uo= | ||
| github.com/pmezard/go-difflib v0.0.0-20151028094244-d8ed2627bdf0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= | ||
| github.com/puzpuzpuz/xsync v0.0.0-20210815074145-06f072a152a8 h1:bAvbvlslJkn5r/JnGkDOoZ5/N1I6zBiDBcCpsZ8an/Q= | ||
| github.com/puzpuzpuz/xsync v0.0.0-20210815074145-06f072a152a8/go.mod h1:GF6mnc4fZ1Vit0eWBHPcthv2l1nE81+iZvLsexB/HM4= | ||
| github.com/puzpuzpuz/xsync v1.0.1-0.20210823092703-32778049b5f5 h1:ZoUoiy+1+jwi9B2+5F0Mh4HMlI/q01Nqt+qN9T2h5lA= | ||
| github.com/puzpuzpuz/xsync v1.0.1-0.20210823092703-32778049b5f5/go.mod h1:GF6mnc4fZ1Vit0eWBHPcthv2l1nE81+iZvLsexB/HM4= | ||
| github.com/rogpeppe/go-internal v1.8.0/go.mod h1:WmiCO8CzOY8rg0OYDC4/i/2WRWAB6poM+XZ2dLUbcbE= | ||
| github.com/sanity-io/litter v1.5.1 h1:dwnrSypP6q56o3lFxTU+t2fwQ9A+U5qrXVO4Qg9KwVU= | ||
| github.com/sanity-io/litter v1.5.1/go.mod h1:5Z71SvaYy5kcGtyglXOC9rrUi3c1E8CamFWjQsazTh0= | ||
| github.com/stretchr/testify v0.0.0-20161117074351-18a02ba4a312 h1:UsFdQ3ZmlzS0BqZYGxvYaXvFGUbCmPGy8DM7qWJJiIQ= | ||
| github.com/stretchr/testify v0.0.0-20161117074351-18a02ba4a312/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs= | ||
| github.com/thepudds/fzgo v0.2.3-0.20211028225222-cdf4f1cc8ee2/go.mod h1:ZgigL1toyKrar3rWdXz7Fuv7bUpKZ4BAYN49TpEFMCI= | ||
| github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k= | ||
| golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= | ||
| golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= | ||
| golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA= | ||
| golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= | ||
| golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= | ||
| golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y= | ||
| golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= | ||
| golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= | ||
| golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= | ||
| golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= | ||
| golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= | ||
| golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= | ||
| golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= | ||
| golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo= | ||
| golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= | ||
| golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= | ||
| golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= | ||
| golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= | ||
| golang.org/x/tools v0.1.7/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo= | ||
| golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= | ||
| golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= | ||
| golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= | ||
| golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= | ||
| gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= | ||
| gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI= |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| // xsyncmap is a thin wrapper over github.com/puzpuzpuz/xsync.Map. | ||
|
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| package xsyncmap | ||
|
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| import "github.com/puzpuzpuz/xsync" | ||
|
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| // target https://github.com/puzpuzpuz/xsync at 32778049b | ||
|
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| type XSyncMap struct { | ||
| xsyncmap *xsync.Map | ||
| } | ||
|
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| func NewXSyncMap() *XSyncMap { | ||
| return &XSyncMap{xsync.NewMap()} | ||
| } | ||
|
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| func (m *XSyncMap) Delete(key string) { | ||
| m.xsyncmap.Delete(key) | ||
| } | ||
|
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| func (m *XSyncMap) Load(key string) (value int8, ok bool) { | ||
| v, ok := m.xsyncmap.Load(key) | ||
| if !ok { | ||
| return 0, false | ||
| } | ||
| return v.(int8), ok | ||
| } | ||
|
|
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| func (m *XSyncMap) LoadAndDelete(key string) (value int8, loaded bool) { | ||
| v, loaded := m.xsyncmap.LoadAndDelete(key) | ||
| if !loaded { | ||
| return 0, false | ||
| } | ||
| return v.(int8), loaded | ||
| } | ||
|
|
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| func (m *XSyncMap) LoadOrStore(key string, value int8) (actual int8, loaded bool) { | ||
| v, loaded := m.xsyncmap.LoadOrStore(key, value) | ||
| if !loaded { | ||
| return 0, false | ||
| } | ||
| return v.(int8), loaded | ||
| } | ||
|
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| func (m *XSyncMap) Store(key string, value int8) { | ||
| m.xsyncmap.Store(key, value) | ||
| } | ||
|
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| // Range will be ignored by default by fzgen. | ||
| func (m *XSyncMap) Range(f func(key string, value interface{}) bool) { | ||
| m.xsyncmap.Range(f) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,15 @@ | ||
| module github.com/thepudds/fzgen/examples/inputs/race-xsyncmap | ||
|
|
||
| go 1.17 | ||
|
|
||
| require ( | ||
| github.com/puzpuzpuz/xsync v1.0.1-0.20210823092703-32778049b5f5 | ||
| github.com/thepudds/fzgen v0.0.0-00010101000000-000000000000 | ||
| ) | ||
|
|
||
| require ( | ||
| github.com/google/gofuzz v1.2.0 // indirect | ||
| github.com/sanity-io/litter v1.5.1 // indirect | ||
| ) | ||
|
|
||
| replace github.com/thepudds/fzgen => ./../../.. |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,49 @@ | ||
| github.com/davecgh/go-spew v0.0.0-20161028175848-04cdfd42973b/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= | ||
| github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= | ||
| github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= | ||
| github.com/google/go-cmp v0.5.6 h1:BKbKCqvP6I+rmFHt06ZmyQtvB8xAkWdhFyr0ZUNZcxQ= | ||
| github.com/google/go-cmp v0.5.6/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE= | ||
| github.com/google/gofuzz v1.2.0 h1:xRy4A+RhZaiKjJ1bPfwQ8sedCA+YS2YcCHW6ec7JMi0= | ||
| github.com/google/gofuzz v1.2.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg= | ||
| github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo= | ||
| github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ= | ||
| github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI= | ||
| github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA= | ||
| github.com/pmezard/go-difflib v0.0.0-20151028094244-d8ed2627bdf0 h1:GD+A8+e+wFkqje55/2fOVnZPkoDIu1VooBWfNrnY8Uo= | ||
| github.com/pmezard/go-difflib v0.0.0-20151028094244-d8ed2627bdf0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= | ||
| github.com/puzpuzpuz/xsync v0.0.0-20210815074145-06f072a152a8 h1:bAvbvlslJkn5r/JnGkDOoZ5/N1I6zBiDBcCpsZ8an/Q= | ||
| github.com/puzpuzpuz/xsync v0.0.0-20210815074145-06f072a152a8/go.mod h1:GF6mnc4fZ1Vit0eWBHPcthv2l1nE81+iZvLsexB/HM4= | ||
| github.com/puzpuzpuz/xsync v1.0.1-0.20210823092703-32778049b5f5 h1:ZoUoiy+1+jwi9B2+5F0Mh4HMlI/q01Nqt+qN9T2h5lA= | ||
| github.com/puzpuzpuz/xsync v1.0.1-0.20210823092703-32778049b5f5/go.mod h1:GF6mnc4fZ1Vit0eWBHPcthv2l1nE81+iZvLsexB/HM4= | ||
| github.com/rogpeppe/go-internal v1.8.0/go.mod h1:WmiCO8CzOY8rg0OYDC4/i/2WRWAB6poM+XZ2dLUbcbE= | ||
| github.com/sanity-io/litter v1.5.1 h1:dwnrSypP6q56o3lFxTU+t2fwQ9A+U5qrXVO4Qg9KwVU= | ||
| github.com/sanity-io/litter v1.5.1/go.mod h1:5Z71SvaYy5kcGtyglXOC9rrUi3c1E8CamFWjQsazTh0= | ||
| github.com/stretchr/testify v0.0.0-20161117074351-18a02ba4a312 h1:UsFdQ3ZmlzS0BqZYGxvYaXvFGUbCmPGy8DM7qWJJiIQ= | ||
| github.com/stretchr/testify v0.0.0-20161117074351-18a02ba4a312/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs= | ||
| github.com/thepudds/fzgo v0.2.3-0.20211028225222-cdf4f1cc8ee2/go.mod h1:ZgigL1toyKrar3rWdXz7Fuv7bUpKZ4BAYN49TpEFMCI= | ||
| github.com/yuin/goldmark v1.4.0/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k= | ||
| golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w= | ||
| golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI= | ||
| golang.org/x/mod v0.4.2/go.mod h1:s0Qsj1ACt9ePp/hMypM3fl4fZqREWJwdYDEqhRiZZUA= | ||
| golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg= | ||
| golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s= | ||
| golang.org/x/net v0.0.0-20210805182204-aaa1db679c0d/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y= | ||
| golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= | ||
| golang.org/x/sync v0.0.0-20210220032951-036812b2e83c/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM= | ||
| golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY= | ||
| golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= | ||
| golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= | ||
| golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs= | ||
| golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= | ||
| golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo= | ||
| golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ= | ||
| golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ= | ||
| golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ= | ||
| golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo= | ||
| golang.org/x/tools v0.1.7/go.mod h1:LGqMHiF4EqQNHR1JncWGqT5BVaXmza+X+BDGol+dOxo= | ||
| golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= | ||
| golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= | ||
| golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= | ||
| golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0= | ||
| gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= | ||
| gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI= |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,33 @@ | ||
| // xsyncqueue is a thin wrapper over github.com/puzpuzpuz/xsync.MPMCQueue. | ||
|
|
||
| package xsyncqueue | ||
|
|
||
| import "github.com/puzpuzpuz/xsync" | ||
|
|
||
| type XSyncMPMCQueue struct { | ||
| xsyncq *xsync.MPMCQueue | ||
| } | ||
|
|
||
| func NewMPMCQueue(capacity int) *XSyncMPMCQueue { | ||
| return &XSyncMPMCQueue{xsync.NewMPMCQueue(capacity)} | ||
| } | ||
|
|
||
| func (q *XSyncMPMCQueue) Dequeue() int8 { | ||
| return q.xsyncq.Dequeue().(int8) | ||
| } | ||
|
|
||
| func (q *XSyncMPMCQueue) Enqueue(item int8) { | ||
| q.xsyncq.Enqueue(item) | ||
| } | ||
|
|
||
| func (q *XSyncMPMCQueue) TryDequeue() (item int8, ok bool) { | ||
| v, ok := q.xsyncq.TryDequeue() | ||
| if !ok { | ||
| return 0, false | ||
| } | ||
| return v.(int8), true | ||
| } | ||
|
|
||
| func (q *XSyncMPMCQueue) TryEnqueue(item int8) bool { | ||
| return q.xsyncq.TryEnqueue(item) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| // raceexample wraps sync.Map in a type-safe way, but sadly the implementation has a | ||
| // a possible data race in handling a counter on the objects stored in the sync.Map. | ||
| // | ||
| // To observe the data race with the race detector: | ||
| // 1. A Store must be followed by two Loads, and all three must use the same key. | ||
| // 2. The Store must have certain payload data (Answer: 42). | ||
| // 3. The two Loads must happen concurrently. | ||
| // 4. Prior to the two Loads, no other Store can update the key to have a non-matching payload. | ||
| // | ||
| // Using the fzgen/fuzzer.Chain created by default via 'fzgen -chain -parallel -pkg=github.com/thepudds/fzgen/examples/inputs/race', | ||
| // this data race is typically caught after a few minutes of fuzzing with '-race' when starting from scratch. | ||
| package raceexample | ||
|
|
||
| import ( | ||
| "sync" | ||
| ) | ||
|
|
||
| type MySafeMap struct { | ||
| syncMap sync.Map | ||
| } | ||
|
|
||
| func NewMySafeMap() *MySafeMap { | ||
| return &MySafeMap{} | ||
| } | ||
|
|
||
| func (m *MySafeMap) Store(key [16]byte, req *Request) { | ||
| m.syncMap.Store(key, req) | ||
| } | ||
|
|
||
| func (m *MySafeMap) Load(key [16]byte) *Request { | ||
| r, ok := m.syncMap.Load(key) | ||
| if ok { | ||
| req := r.(*Request) | ||
| if req.Answer == 42 { | ||
| // DATA RACE (but requires: matching store/load keys, and concurrent matching load keys, and certain payload data) | ||
| req.deepQuestion++ | ||
| } | ||
| return req | ||
| } | ||
| return nil | ||
| } | ||
|
|
||
| type Request struct { | ||
| Answer int8 // TODO: change to int when cmd/go has the equivalent of go-fuzz sonar or libfuzzer comparision instrumentation | ||
| deepQuestion int | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| // Package returnexample shows an example that would be quite | ||
| // challenging to panic simply using dvyukov/go-fuzz or 'go test -fuzz=.', | ||
| // but which should panic almost immediately via fz.Chain | ||
| // when fz.Chain is properly wiring the return values from a step | ||
| // as candidate input values to another step. | ||
| // | ||
| // To panic, this example has three requirements: | ||
| // 1. Step1 must be called, where Step1 returns the sha256 of its input uint64. | ||
| // 2. Step2 must be subsequently called. | ||
| // 3. The sha256 of the uint64 passed to the most recent Step1 must equal the [32]byte passed to Step2. | ||
| // | ||
| // fz.Chain solves this by wiring the output of Step1 to the input to Step2. | ||
| // | ||
| // The intent is that this example is run sequentially (that is, not with concurrent steps). | ||
| // | ||
| // (go-fuzz's sonar won't look at a [32]byte sha256, and | ||
| // neither will the current value comparision instrumentation in 'go test -fuzz=.', | ||
| // and there are no magic literals to automatically learn for a dictionary). | ||
| package returnexample | ||
|
|
||
| import ( | ||
| "crypto/sha256" | ||
| "encoding/binary" | ||
| ) | ||
|
|
||
| type PanicOnReturnReuse struct { | ||
| rememberedSha [32]byte | ||
| calledStep1 bool | ||
| } | ||
|
|
||
| func New(i int) *PanicOnReturnReuse { | ||
| return &PanicOnReturnReuse{} | ||
| } | ||
|
|
||
| func (p *PanicOnReturnReuse) Step1(input uint64) [32]byte { | ||
| b := make([]byte, 8) | ||
| binary.LittleEndian.PutUint64(b, input) | ||
| p.rememberedSha = sha256.Sum256(b) | ||
| p.calledStep1 = true | ||
| return p.rememberedSha | ||
| } | ||
|
|
||
| func (p *PanicOnReturnReuse) Step2(inputSha [32]byte) { | ||
| if inputSha == p.rememberedSha && p.calledStep1 { | ||
| panic("bingo - found our desired panic") | ||
| } | ||
| } |
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