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383 lines
10 KiB
Go
383 lines
10 KiB
Go
// +build gofuzz
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/*
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# Instructions for smat testing for roaring
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[smat](https://github.com/mschoch/smat) is a framework that provides
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state machine assisted fuzz testing.
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To run the smat tests for roaring...
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## Prerequisites
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$ go get github.com/dvyukov/go-fuzz/go-fuzz
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$ go get github.com/dvyukov/go-fuzz/go-fuzz-build
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## Steps
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1. Generate initial smat corpus:
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```
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go test -tags=gofuzz -run=TestGenerateSmatCorpus
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```
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2. Build go-fuzz test program with instrumentation:
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```
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go-fuzz-build -func FuzzSmat github.com/RoaringBitmap/roaring
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```
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3. Run go-fuzz:
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```
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go-fuzz -bin=./roaring-fuzz.zip -workdir=workdir/ -timeout=200
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```
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You should see output like...
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```
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2016/09/16 13:58:35 slaves: 8, corpus: 1 (3s ago), crashers: 0, restarts: 1/0, execs: 0 (0/sec), cover: 0, uptime: 3s
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2016/09/16 13:58:38 slaves: 8, corpus: 1 (6s ago), crashers: 0, restarts: 1/0, execs: 0 (0/sec), cover: 0, uptime: 6s
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2016/09/16 13:58:41 slaves: 8, corpus: 1 (9s ago), crashers: 0, restarts: 1/44, execs: 44 (5/sec), cover: 0, uptime: 9s
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2016/09/16 13:58:44 slaves: 8, corpus: 1 (12s ago), crashers: 0, restarts: 1/45, execs: 45 (4/sec), cover: 0, uptime: 12s
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2016/09/16 13:58:47 slaves: 8, corpus: 1 (15s ago), crashers: 0, restarts: 1/46, execs: 46 (3/sec), cover: 0, uptime: 15s
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2016/09/16 13:58:50 slaves: 8, corpus: 1 (18s ago), crashers: 0, restarts: 1/47, execs: 47 (3/sec), cover: 0, uptime: 18s
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2016/09/16 13:58:53 slaves: 8, corpus: 1 (21s ago), crashers: 0, restarts: 1/63, execs: 63 (3/sec), cover: 0, uptime: 21s
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2016/09/16 13:58:56 slaves: 8, corpus: 1 (24s ago), crashers: 0, restarts: 1/65, execs: 65 (3/sec), cover: 0, uptime: 24s
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2016/09/16 13:58:59 slaves: 8, corpus: 1 (27s ago), crashers: 0, restarts: 1/66, execs: 66 (2/sec), cover: 0, uptime: 27s
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2016/09/16 13:59:02 slaves: 8, corpus: 1 (30s ago), crashers: 0, restarts: 1/67, execs: 67 (2/sec), cover: 0, uptime: 30s
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2016/09/16 13:59:05 slaves: 8, corpus: 1 (33s ago), crashers: 0, restarts: 1/83, execs: 83 (3/sec), cover: 0, uptime: 33s
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2016/09/16 13:59:08 slaves: 8, corpus: 1 (36s ago), crashers: 0, restarts: 1/84, execs: 84 (2/sec), cover: 0, uptime: 36s
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2016/09/16 13:59:11 slaves: 8, corpus: 2 (0s ago), crashers: 0, restarts: 1/85, execs: 85 (2/sec), cover: 0, uptime: 39s
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2016/09/16 13:59:14 slaves: 8, corpus: 17 (2s ago), crashers: 0, restarts: 1/86, execs: 86 (2/sec), cover: 480, uptime: 42s
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2016/09/16 13:59:17 slaves: 8, corpus: 17 (5s ago), crashers: 0, restarts: 1/66, execs: 132 (3/sec), cover: 487, uptime: 45s
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2016/09/16 13:59:20 slaves: 8, corpus: 17 (8s ago), crashers: 0, restarts: 1/440, execs: 2645 (55/sec), cover: 487, uptime: 48s
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```
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Let it run, and if the # of crashers is > 0, check out the reports in
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the workdir where you should be able to find the panic goroutine stack
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traces.
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*/
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package roaring
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import (
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"fmt"
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"sort"
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"github.com/mschoch/smat"
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"github.com/willf/bitset"
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)
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// fuzz test using state machine driven by byte stream.
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func FuzzSmat(data []byte) int {
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return smat.Fuzz(&smatContext{}, smat.ActionID('S'), smat.ActionID('T'),
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smatActionMap, data)
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}
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var smatDebug = false
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func smatLog(prefix, format string, args ...interface{}) {
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if smatDebug {
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fmt.Print(prefix)
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fmt.Printf(format, args...)
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}
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}
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type smatContext struct {
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pairs []*smatPair
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// Two registers, x & y.
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x int
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y int
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actions int
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}
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type smatPair struct {
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bm *Bitmap
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bs *bitset.BitSet
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}
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// ------------------------------------------------------------------
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var smatActionMap = smat.ActionMap{
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smat.ActionID('X'): smatAction("x++", smatWrap(func(c *smatContext) { c.x++ })),
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smat.ActionID('x'): smatAction("x--", smatWrap(func(c *smatContext) { c.x-- })),
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smat.ActionID('Y'): smatAction("y++", smatWrap(func(c *smatContext) { c.y++ })),
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smat.ActionID('y'): smatAction("y--", smatWrap(func(c *smatContext) { c.y-- })),
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smat.ActionID('*'): smatAction("x*y", smatWrap(func(c *smatContext) { c.x = c.x * c.y })),
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smat.ActionID('<'): smatAction("x<<", smatWrap(func(c *smatContext) { c.x = c.x << 1 })),
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smat.ActionID('^'): smatAction("swap", smatWrap(func(c *smatContext) { c.x, c.y = c.y, c.x })),
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smat.ActionID('['): smatAction(" pushPair", smatWrap(smatPushPair)),
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smat.ActionID(']'): smatAction(" popPair", smatWrap(smatPopPair)),
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smat.ActionID('B'): smatAction(" setBit", smatWrap(smatSetBit)),
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smat.ActionID('b'): smatAction(" removeBit", smatWrap(smatRemoveBit)),
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smat.ActionID('o'): smatAction(" or", smatWrap(smatOr)),
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smat.ActionID('a'): smatAction(" and", smatWrap(smatAnd)),
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smat.ActionID('#'): smatAction(" cardinality", smatWrap(smatCardinality)),
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smat.ActionID('O'): smatAction(" orCardinality", smatWrap(smatOrCardinality)),
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smat.ActionID('A'): smatAction(" andCardinality", smatWrap(smatAndCardinality)),
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smat.ActionID('c'): smatAction(" clear", smatWrap(smatClear)),
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smat.ActionID('r'): smatAction(" runOptimize", smatWrap(smatRunOptimize)),
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smat.ActionID('e'): smatAction(" isEmpty", smatWrap(smatIsEmpty)),
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smat.ActionID('i'): smatAction(" intersects", smatWrap(smatIntersects)),
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smat.ActionID('f'): smatAction(" flip", smatWrap(smatFlip)),
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smat.ActionID('-'): smatAction(" difference", smatWrap(smatDifference)),
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}
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var smatRunningPercentActions []smat.PercentAction
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func init() {
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var ids []int
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for actionId := range smatActionMap {
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ids = append(ids, int(actionId))
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}
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sort.Ints(ids)
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pct := 100 / len(smatActionMap)
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for _, actionId := range ids {
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smatRunningPercentActions = append(smatRunningPercentActions,
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smat.PercentAction{pct, smat.ActionID(actionId)})
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}
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smatActionMap[smat.ActionID('S')] = smatAction("SETUP", smatSetupFunc)
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smatActionMap[smat.ActionID('T')] = smatAction("TEARDOWN", smatTeardownFunc)
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}
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// We only have one smat state: running.
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func smatRunning(next byte) smat.ActionID {
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return smat.PercentExecute(next, smatRunningPercentActions...)
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}
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func smatAction(name string, f func(ctx smat.Context) (smat.State, error)) func(smat.Context) (smat.State, error) {
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return func(ctx smat.Context) (smat.State, error) {
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c := ctx.(*smatContext)
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c.actions++
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smatLog(" ", "%s\n", name)
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return f(ctx)
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}
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}
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// Creates an smat action func based on a simple callback.
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func smatWrap(cb func(c *smatContext)) func(smat.Context) (next smat.State, err error) {
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return func(ctx smat.Context) (next smat.State, err error) {
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c := ctx.(*smatContext)
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cb(c)
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return smatRunning, nil
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}
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}
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// Invokes a callback function with the input v bounded to len(c.pairs).
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func (c *smatContext) withPair(v int, cb func(*smatPair)) {
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if len(c.pairs) > 0 {
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if v < 0 {
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v = -v
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}
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v = v % len(c.pairs)
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cb(c.pairs[v])
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}
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}
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// ------------------------------------------------------------------
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func smatSetupFunc(ctx smat.Context) (next smat.State, err error) {
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return smatRunning, nil
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}
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func smatTeardownFunc(ctx smat.Context) (next smat.State, err error) {
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return nil, err
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}
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// ------------------------------------------------------------------
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func smatPushPair(c *smatContext) {
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c.pairs = append(c.pairs, &smatPair{
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bm: NewBitmap(),
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bs: bitset.New(100),
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})
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}
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func smatPopPair(c *smatContext) {
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if len(c.pairs) > 0 {
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c.pairs = c.pairs[0 : len(c.pairs)-1]
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}
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}
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func smatSetBit(c *smatContext) {
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c.withPair(c.x, func(p *smatPair) {
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y := uint32(c.y)
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p.bm.AddInt(int(y))
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p.bs.Set(uint(y))
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p.checkEquals()
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})
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}
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func smatRemoveBit(c *smatContext) {
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c.withPair(c.x, func(p *smatPair) {
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y := uint32(c.y)
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p.bm.Remove(y)
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p.bs.Clear(uint(y))
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p.checkEquals()
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})
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}
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func smatAnd(c *smatContext) {
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c.withPair(c.x, func(px *smatPair) {
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c.withPair(c.y, func(py *smatPair) {
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px.bm.And(py.bm)
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px.bs = px.bs.Intersection(py.bs)
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px.checkEquals()
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py.checkEquals()
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})
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})
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}
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func smatOr(c *smatContext) {
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c.withPair(c.x, func(px *smatPair) {
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c.withPair(c.y, func(py *smatPair) {
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px.bm.Or(py.bm)
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px.bs = px.bs.Union(py.bs)
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px.checkEquals()
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py.checkEquals()
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})
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})
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}
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func smatAndCardinality(c *smatContext) {
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c.withPair(c.x, func(px *smatPair) {
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c.withPair(c.y, func(py *smatPair) {
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c0 := px.bm.AndCardinality(py.bm)
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c1 := px.bs.IntersectionCardinality(py.bs)
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if c0 != uint64(c1) {
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panic("expected same add cardinality")
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}
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px.checkEquals()
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py.checkEquals()
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})
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})
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}
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func smatOrCardinality(c *smatContext) {
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c.withPair(c.x, func(px *smatPair) {
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c.withPair(c.y, func(py *smatPair) {
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c0 := px.bm.OrCardinality(py.bm)
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c1 := px.bs.UnionCardinality(py.bs)
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if c0 != uint64(c1) {
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panic("expected same or cardinality")
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}
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px.checkEquals()
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py.checkEquals()
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})
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})
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}
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func smatRunOptimize(c *smatContext) {
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c.withPair(c.x, func(px *smatPair) {
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px.bm.RunOptimize()
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px.checkEquals()
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})
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}
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func smatClear(c *smatContext) {
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c.withPair(c.x, func(px *smatPair) {
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px.bm.Clear()
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px.bs = px.bs.ClearAll()
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px.checkEquals()
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})
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}
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func smatCardinality(c *smatContext) {
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c.withPair(c.x, func(px *smatPair) {
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c0 := px.bm.GetCardinality()
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c1 := px.bs.Count()
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if c0 != uint64(c1) {
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panic("expected same cardinality")
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}
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})
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}
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func smatIsEmpty(c *smatContext) {
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c.withPair(c.x, func(px *smatPair) {
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c0 := px.bm.IsEmpty()
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c1 := px.bs.None()
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if c0 != c1 {
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panic("expected same is empty")
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}
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})
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}
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func smatIntersects(c *smatContext) {
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c.withPair(c.x, func(px *smatPair) {
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c.withPair(c.y, func(py *smatPair) {
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v0 := px.bm.Intersects(py.bm)
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v1 := px.bs.IntersectionCardinality(py.bs) > 0
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if v0 != v1 {
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panic("intersects not equal")
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}
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px.checkEquals()
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py.checkEquals()
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})
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})
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}
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func smatFlip(c *smatContext) {
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c.withPair(c.x, func(p *smatPair) {
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y := uint32(c.y)
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p.bm.Flip(uint64(y), uint64(y)+1)
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p.bs = p.bs.Flip(uint(y))
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p.checkEquals()
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})
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}
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func smatDifference(c *smatContext) {
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c.withPair(c.x, func(px *smatPair) {
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c.withPair(c.y, func(py *smatPair) {
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px.bm.AndNot(py.bm)
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px.bs = px.bs.Difference(py.bs)
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px.checkEquals()
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py.checkEquals()
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})
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})
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}
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func (p *smatPair) checkEquals() {
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if !p.equalsBitSet(p.bs, p.bm) {
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panic("bitset mismatch")
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}
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}
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func (p *smatPair) equalsBitSet(a *bitset.BitSet, b *Bitmap) bool {
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for i, e := a.NextSet(0); e; i, e = a.NextSet(i + 1) {
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if !b.ContainsInt(int(i)) {
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fmt.Printf("in a bitset, not b bitmap, i: %d\n", i)
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fmt.Printf(" a bitset: %s\n b bitmap: %s\n",
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a.String(), b.String())
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return false
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}
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}
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i := b.Iterator()
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for i.HasNext() {
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v := i.Next()
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if !a.Test(uint(v)) {
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fmt.Printf("in b bitmap, not a bitset, v: %d\n", v)
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fmt.Printf(" a bitset: %s\n b bitmap: %s\n",
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a.String(), b.String())
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return false
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}
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}
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return true
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}
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