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|
//go:build go1.18
// +build go1.18
package zstd
import (
"bytes"
"fmt"
"io"
rdebug "runtime/debug"
"testing"
"github.com/klauspost/compress/internal/cpuinfo"
"github.com/klauspost/compress/internal/fuzz"
)
func FuzzDecodeAll(f *testing.F) {
fuzz.AddFromZip(f, "testdata/decode-regression.zip", fuzz.TypeRaw, false)
fuzz.AddFromZip(f, "testdata/fuzz/decode-corpus-raw.zip", fuzz.TypeRaw, testing.Short())
fuzz.AddFromZip(f, "testdata/fuzz/decode-corpus-encoded.zip", fuzz.TypeGoFuzz, testing.Short())
f.Fuzz(func(t *testing.T, b []byte) {
// Just test if we crash...
defer func() {
if r := recover(); r != nil {
rdebug.PrintStack()
t.Fatal(r)
}
}()
decLow, err := NewReader(nil, WithDecoderLowmem(true), WithDecoderConcurrency(2), WithDecoderMaxMemory(20<<20), WithDecoderMaxWindow(1<<20), IgnoreChecksum(true))
if err != nil {
f.Fatal(err)
}
defer decLow.Close()
decHi, err := NewReader(nil, WithDecoderLowmem(false), WithDecoderConcurrency(2), WithDecoderMaxMemory(20<<20), WithDecoderMaxWindow(1<<20), IgnoreChecksum(true))
if err != nil {
f.Fatal(err)
}
defer decHi.Close()
b1, err1 := decLow.DecodeAll(b, make([]byte, 0, len(b)))
b2, err2 := decHi.DecodeAll(b, make([]byte, 0, len(b)))
if err1 != err2 {
if (err1 == nil) != (err2 == nil) {
t.Errorf("err low: %v, hi: %v", err1, err2)
}
}
if err1 != nil {
b1, b2 = b1[:0], b2[:0]
}
if !bytes.Equal(b1, b2) {
t.Fatalf("Output mismatch, low: %v, hi: %v", err1, err2)
}
})
}
func FuzzDecAllNoBMI2(f *testing.F) {
if !cpuinfo.HasBMI2() {
f.Skip("No BMI, so already tested")
return
}
defer cpuinfo.DisableBMI2()()
FuzzDecodeAll(f)
}
func FuzzDecoder(f *testing.F) {
fuzz.AddFromZip(f, "testdata/fuzz/decode-corpus-raw.zip", fuzz.TypeRaw, testing.Short())
fuzz.AddFromZip(f, "testdata/fuzz/decode-corpus-encoded.zip", fuzz.TypeGoFuzz, testing.Short())
//fuzz.AddFromZip(f, "testdata/fuzz/decode-oss.zip", fuzz.TypeOSSFuzz, false)
brLow := newBytesReader(nil)
brHi := newBytesReader(nil)
f.Fuzz(func(t *testing.T, b []byte) {
// Just test if we crash...
defer func() {
if r := recover(); r != nil {
rdebug.PrintStack()
t.Fatal(r)
}
}()
brLow.Reset(b)
brHi.Reset(b)
decLow, err := NewReader(brLow, WithDecoderLowmem(true), WithDecoderConcurrency(2), WithDecoderMaxMemory(20<<20), WithDecoderMaxWindow(1<<20), IgnoreChecksum(true), WithDecodeBuffersBelow(8<<10))
if err != nil {
f.Fatal(err)
}
defer decLow.Close()
// Test with high memory, but sync decoding
decHi, err := NewReader(brHi, WithDecoderLowmem(false), WithDecoderConcurrency(1), WithDecoderMaxMemory(20<<20), WithDecoderMaxWindow(1<<20), IgnoreChecksum(true), WithDecodeBuffersBelow(8<<10))
if err != nil {
f.Fatal(err)
}
defer decHi.Close()
if debugDecoder {
fmt.Println("LOW CONCURRENT")
}
b1, err1 := io.ReadAll(decLow)
if debugDecoder {
fmt.Println("HI NOT CONCURRENT")
}
b2, err2 := io.ReadAll(decHi)
if err1 != err2 {
if (err1 == nil) != (err2 == nil) {
t.Errorf("err low concurrent: %v, hi: %v", err1, err2)
}
}
if err1 != nil {
b1, b2 = b1[:0], b2[:0]
}
if !bytes.Equal(b1, b2) {
t.Fatalf("Output mismatch, low concurrent: %v, hi: %v", err1, err2)
}
})
}
func FuzzNoBMI2Dec(f *testing.F) {
if !cpuinfo.HasBMI2() {
f.Skip("No BMI, so already tested")
return
}
defer cpuinfo.DisableBMI2()()
FuzzDecoder(f)
}
func FuzzEncoding(f *testing.F) {
fuzz.AddFromZip(f, "testdata/fuzz/encode-corpus-raw.zip", fuzz.TypeRaw, testing.Short())
fuzz.AddFromZip(f, "testdata/comp-crashers.zip", fuzz.TypeRaw, false)
fuzz.AddFromZip(f, "testdata/fuzz/encode-corpus-encoded.zip", fuzz.TypeGoFuzz, testing.Short())
// Fuzzing tweaks:
const (
// Test a subset of encoders.
startFuzz = SpeedFastest
endFuzz = SpeedBestCompression
// Also tests with dictionaries...
testDicts = true
)
var dec *Decoder
var encs [SpeedBestCompression + 1]*Encoder
var encsD [SpeedBestCompression + 1]*Encoder
var dicts [][]byte
if testDicts {
zr := testCreateZipReader("testdata/dict-tests-small.zip", f)
dicts = readDicts(f, zr)
}
if testing.Short() && *fuzzEndF > int(SpeedBetterCompression) {
*fuzzEndF = int(SpeedBetterCompression)
}
initEnc := func() func() {
var err error
dec, err = NewReader(nil, WithDecoderConcurrency(2), WithDecoderDicts(dicts...), WithDecoderMaxWindow(64<<10), WithDecoderMaxMemory(uint64(*fuzzMaxF)))
if err != nil {
panic(err)
}
for level := startFuzz; level <= endFuzz; level++ {
encs[level], err = NewWriter(nil, WithEncoderCRC(true), WithEncoderLevel(level), WithEncoderConcurrency(2), WithWindowSize(64<<10), WithZeroFrames(true), WithLowerEncoderMem(true))
if testDicts {
encsD[level], err = NewWriter(nil, WithEncoderCRC(true), WithEncoderLevel(level), WithEncoderConcurrency(2), WithWindowSize(64<<10), WithZeroFrames(true), WithEncoderDict(dicts[int(level)%len(dicts)]), WithLowerEncoderMem(true), WithLowerEncoderMem(true))
}
}
return func() {
dec.Close()
for _, enc := range encs {
if enc != nil {
enc.Close()
}
}
if testDicts {
for _, enc := range encsD {
if enc != nil {
enc.Close()
}
}
}
}
}
f.Cleanup(initEnc())
var dst bytes.Buffer
f.Fuzz(func(t *testing.T, data []byte) {
// Just test if we crash...
defer func() {
if r := recover(); r != nil {
stack := rdebug.Stack()
t.Fatalf("%v:\n%v", r, string(stack))
}
}()
if len(data) > *fuzzMaxF {
return
}
var bufSize = len(data)
if bufSize > 2 {
// Make deterministic size
bufSize = int(data[0]) | int(data[1])<<8
if bufSize >= len(data) {
bufSize = len(data) / 2
}
}
for level := *fuzzStartF; level <= *fuzzEndF; level++ {
enc := encs[level]
dst.Reset()
enc.Reset(&dst)
n, err := enc.Write(data)
if err != nil {
t.Fatal(err)
}
if n != len(data) {
t.Fatal(fmt.Sprintln("Level", level, "Short write, got:", n, "want:", len(data)))
}
encoded := enc.EncodeAll(data, make([]byte, 0, bufSize))
if len(encoded) > enc.MaxEncodedSize(len(data)) {
t.Errorf("max encoded size for %v: got: %d, want max: %d", len(data), len(encoded), enc.MaxEncodedSize(len(data)))
}
got, err := dec.DecodeAll(encoded, make([]byte, 0, bufSize))
if err != nil {
t.Fatal(fmt.Sprintln("Level", level, "DecodeAll error:", err, "\norg:", len(data), "\nencoded", len(encoded)))
}
if !bytes.Equal(got, data) {
t.Fatal(fmt.Sprintln("Level", level, "DecodeAll output mismatch\n", len(got), "org: \n", len(data), "(want)", "\nencoded:", len(encoded)))
}
err = enc.Close()
if err != nil {
t.Fatal(fmt.Sprintln("Level", level, "Close (buffer) error:", err))
}
encoded2 := dst.Bytes()
if len(encoded2) > enc.MaxEncodedSize(len(data)) {
t.Errorf("max encoded size for %v: got: %d, want max: %d", len(data), len(encoded2), enc.MaxEncodedSize(len(data)))
}
if !bytes.Equal(encoded, encoded2) {
got, err = dec.DecodeAll(encoded2, got[:0])
if err != nil {
t.Fatal(fmt.Sprintln("Level", level, "DecodeAll (buffer) error:", err, "\norg:", len(data), "\nencoded", len(encoded2)))
}
if !bytes.Equal(got, data) {
t.Fatal(fmt.Sprintln("Level", level, "DecodeAll (buffer) output mismatch\n", len(got), "org: \n", len(data), "(want)", "\nencoded:", len(encoded2)))
}
}
if !testDicts {
continue
}
enc = encsD[level]
dst.Reset()
enc.Reset(&dst)
n, err = enc.Write(data)
if err != nil {
t.Fatal(err)
}
if n != len(data) {
t.Fatal(fmt.Sprintln("Dict Level", level, "Short write, got:", n, "want:", len(data)))
}
encoded = enc.EncodeAll(data, encoded[:0])
if len(encoded) > enc.MaxEncodedSize(len(data)) {
t.Errorf("max encoded size for %v: got: %d, want max: %d", len(data), len(encoded), enc.MaxEncodedSize(len(data)))
}
got, err = dec.DecodeAll(encoded, got[:0])
if err != nil {
t.Fatal(fmt.Sprintln("Dict Level", level, "DecodeAll error:", err, "\norg:", len(data), "\nencoded", len(encoded)))
}
if !bytes.Equal(got, data) {
t.Fatal(fmt.Sprintln("Dict Level", level, "DecodeAll output mismatch\n", len(got), "org: \n", len(data), "(want)", "\nencoded:", len(encoded)))
}
err = enc.Close()
if err != nil {
t.Fatal(fmt.Sprintln("Dict Level", level, "Close (buffer) error:", err))
}
encoded2 = dst.Bytes()
if len(encoded2) > enc.MaxEncodedSize(len(data)) {
t.Errorf("max encoded size for %v: got: %d, want max: %d", len(data), len(encoded2), enc.MaxEncodedSize(len(data)))
}
if !bytes.Equal(encoded, encoded2) {
got, err = dec.DecodeAll(encoded2, got[:0])
if err != nil {
t.Fatal(fmt.Sprintln("Dict Level", level, "DecodeAll (buffer) error:", err, "\norg:", len(data), "\nencoded", len(encoded2)))
}
if !bytes.Equal(got, data) {
t.Fatal(fmt.Sprintln("Dict Level", level, "DecodeAll (buffer) output mismatch\n", len(got), "org: \n", len(data), "(want)", "\nencoded:", len(encoded2)))
}
}
}
})
}
|
