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// Copyright 2015 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 ipc_test
import (
"fmt"
"math/rand"
"os"
"path/filepath"
"runtime"
"testing"
"time"
"github.com/google/syzkaller/pkg/csource"
"github.com/google/syzkaller/pkg/image"
. "github.com/google/syzkaller/pkg/ipc"
"github.com/google/syzkaller/pkg/ipc/ipcconfig"
"github.com/google/syzkaller/pkg/osutil"
"github.com/google/syzkaller/pkg/testutil"
"github.com/google/syzkaller/prog"
_ "github.com/google/syzkaller/sys"
"github.com/google/syzkaller/sys/targets"
)
func buildExecutor(t *testing.T, target *prog.Target) string {
src := filepath.FromSlash("../../executor/executor.cc")
bin, err := csource.BuildFile(target, src)
if err != nil {
t.Fatal(err)
}
return bin
}
func initTest(t *testing.T) (*prog.Target, rand.Source, int, bool, bool, targets.Timeouts) {
t.Parallel()
iters := 100
if testing.Short() {
iters = 10
}
target, err := prog.GetTarget(runtime.GOOS, runtime.GOARCH)
if err != nil {
t.Fatal(err)
}
cfg, _, err := ipcconfig.Default(target)
if err != nil {
t.Fatal(err)
}
rs := testutil.RandSource(t)
return target, rs, iters, cfg.UseShmem, cfg.UseForkServer, cfg.Timeouts
}
// TestExecutor runs all internal executor unit tests.
// We do it here because we already build executor binary here.
func TestExecutor(t *testing.T) {
t.Parallel()
for _, sysTarget := range targets.List[runtime.GOOS] {
sysTarget := targets.Get(runtime.GOOS, sysTarget.Arch)
t.Run(sysTarget.Arch, func(t *testing.T) {
if sysTarget.BrokenCompiler != "" {
t.Skipf("skipping, broken cross-compiler: %v", sysTarget.BrokenCompiler)
}
t.Parallel()
target, err := prog.GetTarget(runtime.GOOS, sysTarget.Arch)
if err != nil {
t.Fatal(err)
}
bin := buildExecutor(t, target)
defer os.Remove(bin)
// qemu-user may allow us to run some cross-arch binaries.
if _, err := osutil.RunCmd(time.Minute, "", bin, "test"); err != nil {
if sysTarget.Arch == runtime.GOARCH || sysTarget.VMArch == runtime.GOARCH {
t.Fatal(err)
}
t.Skipf("skipping, cross-arch binary failed: %v", err)
}
})
}
}
func prepareTestProgram(target *prog.Target) *prog.Prog {
p := target.DataMmapProg()
if len(p.Calls) > 1 {
p.Calls[1].Props.Async = true
}
return p
}
func TestExecute(t *testing.T) {
target, _, _, useShmem, useForkServer, timeouts := initTest(t)
bin := buildExecutor(t, target)
defer os.Remove(bin)
flags := []ExecFlags{0, FlagThreaded}
for _, flag := range flags {
t.Logf("testing flags 0x%x", flag)
cfg := &Config{
Executor: bin,
UseShmem: useShmem,
UseForkServer: useForkServer,
Timeouts: timeouts,
SandboxArg: 0,
}
env, err := MakeEnv(cfg, 0)
if err != nil {
t.Fatalf("failed to create env: %v", err)
}
defer env.Close()
for i := 0; i < 10; i++ {
p := prepareTestProgram(target)
opts := &ExecOpts{
Flags: flag,
}
output, info, hanged, err := env.Exec(opts, p)
if err != nil {
t.Fatalf("failed to run executor: %v", err)
}
if hanged {
t.Fatalf("program hanged:\n%s", output)
}
if len(info.Calls) != len(p.Calls) {
t.Fatalf("executed less calls (%v) than prog len(%v):\n%s", len(info.Calls), len(p.Calls), output)
}
if info.Calls[0].Errno != 0 {
t.Fatalf("simple call failed: %v\n%s", info.Calls[0].Errno, output)
}
if len(output) != 0 {
t.Fatalf("output on empty program")
}
}
}
}
func TestParallel(t *testing.T) {
target, _, _, useShmem, useForkServer, timeouts := initTest(t)
bin := buildExecutor(t, target)
defer os.Remove(bin)
cfg := &Config{
Executor: bin,
UseShmem: useShmem,
UseForkServer: useForkServer,
Timeouts: timeouts,
SandboxArg: 0,
}
const P = 10
errs := make(chan error, P)
for p := 0; p < P; p++ {
p := p
go func() {
env, err := MakeEnv(cfg, p)
if err != nil {
errs <- fmt.Errorf("failed to create env: %w", err)
return
}
defer func() {
env.Close()
errs <- err
}()
p := target.DataMmapProg()
opts := &ExecOpts{}
output, info, hanged, err := env.Exec(opts, p)
if err != nil {
err = fmt.Errorf("failed to run executor: %w", err)
return
}
if hanged {
err = fmt.Errorf("program hanged:\n%s", output)
return
}
if len(info.Calls) == 0 {
err = fmt.Errorf("no calls executed:\n%s", output)
return
}
if info.Calls[0].Errno != 0 {
err = fmt.Errorf("simple call failed: %v\n%s", info.Calls[0].Errno, output)
return
}
if len(output) != 0 {
err = fmt.Errorf("output on empty program")
return
}
}()
}
for p := 0; p < P; p++ {
if err := <-errs; err != nil {
t.Fatal(err)
}
}
}
func TestZlib(t *testing.T) {
t.Parallel()
target, err := prog.GetTarget(targets.TestOS, targets.TestArch64)
if err != nil {
t.Fatal(err)
}
sysTarget := targets.Get(target.OS, target.Arch)
if sysTarget.BrokenCompiler != "" {
t.Skipf("skipping, broken cross-compiler: %v", sysTarget.BrokenCompiler)
}
cfg, opts, err := ipcconfig.Default(target)
if err != nil {
t.Fatal(err)
}
cfg.Flags |= FlagDebug
cfg.Executor = buildExecutor(t, target)
defer os.Remove(cfg.Executor)
env, err := MakeEnv(cfg, 0)
if err != nil {
t.Fatalf("failed to create env: %v", err)
}
defer env.Close()
r := rand.New(testutil.RandSource(t))
for i := 0; i < 10; i++ {
data := testutil.RandMountImage(r)
compressed := image.Compress(data)
text := fmt.Sprintf(`syz_compare_zlib(&(0x7f0000000000)="$%s", AUTO, &(0x7f0000800000)="$%s", AUTO)`,
image.EncodeB64(data), image.EncodeB64(compressed))
p, err := target.Deserialize([]byte(text), prog.Strict)
if err != nil {
t.Fatalf("failed to deserialize empty program: %v", err)
}
output, info, _, err := env.Exec(opts, p)
if err != nil {
t.Fatalf("failed to run executor: %v", err)
}
if info.Calls[0].Errno != 0 {
t.Fatalf("data comparison failed: %v\n%s", info.Calls[0].Errno, output)
}
}
}
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