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// Copyright 2022 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package image_test
import (
"bytes"
"fmt"
"io/ioutil"
"math/rand"
"path/filepath"
"testing"
. "github.com/google/syzkaller/pkg/image"
"github.com/google/syzkaller/pkg/testutil"
"github.com/google/syzkaller/prog"
_ "github.com/google/syzkaller/sys/linux/gen"
)
func TestCompress(t *testing.T) {
t.Parallel()
r := rand.New(testutil.RandSource(t))
for i := 0; i < testutil.IterCount(); i++ {
t.Run(fmt.Sprint(i), func(t *testing.T) {
randBytes := testutil.RandMountImage(r)
resultBytes := Compress(randBytes)
resultBytes, dtor := MustDecompress(resultBytes)
defer dtor()
if !bytes.Equal(randBytes, resultBytes) {
t.Fatalf("roundtrip changes data (length %v->%v)", len(randBytes), len(resultBytes))
}
})
}
}
func TestEncode(t *testing.T) {
t.Parallel()
r := rand.New(testutil.RandSource(t))
for i := 0; i < testutil.IterCount(); i++ {
randBytes := testutil.RandMountImage(r)
resultBytes := EncodeB64(randBytes)
resultBytes, err := DecodeB64(resultBytes)
if err != nil {
t.Fatalf("decoding failed: %v", err)
}
if !bytes.Equal(randBytes, resultBytes) {
t.Fatalf("roundtrip changes data (original length %d)", len(randBytes))
}
}
}
func BenchmarkDecompress(b *testing.B) {
// Extract the largest image seed.
data, err := ioutil.ReadFile(filepath.FromSlash("../../sys/linux/test/syz_mount_image_gfs2_0"))
if err != nil {
b.Fatal(err)
}
target, err := prog.GetTarget("linux", "amd64")
if err != nil {
b.Fatal(err)
}
p, err := target.Deserialize(data, prog.Strict)
if err != nil {
b.Fatalf("failed to deserialize the program: %v", err)
}
compressed := p.Calls[0].Args[6].(*prog.PointerArg).Res.(*prog.DataArg).Data()
if len(compressed) < 100<<10 {
b.Fatalf("compressed data is too small: %v", len(compressed))
}
b.ReportAllocs()
b.ResetTimer()
for i := 0; i < b.N; i++ {
uncompressed, dtor := MustDecompress(compressed)
if len(uncompressed) < 10<<20 {
b.Fatalf("uncompressed data is too small: %v", len(uncompressed))
}
dtor()
}
}
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