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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 runtest
import (
"context"
"fmt"
"math/rand"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
"testing"
"time"
"github.com/google/syzkaller/pkg/csource"
"github.com/google/syzkaller/pkg/flatrpc"
"github.com/google/syzkaller/pkg/fuzzer/queue"
"github.com/google/syzkaller/pkg/image"
"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"
)
// Find the corresponding QEMU binary for the target arch, if needed.
func qemuBinary(arch string) (string, error) {
qarch, ok := map[string]string{
"386": "i386",
"amd64": "x86_64",
"arm64": "aarch64",
"arm": "arm",
"mips64le": "mips64el",
"ppc64le": "ppc64le",
"riscv64": "riscv64",
"s390x": "s390x",
}[arch]
if !ok {
return "", fmt.Errorf("unsupported architecture: %s", arch)
}
qemuBinary := "qemu-" + qarch
path, err := exec.LookPath(qemuBinary)
if err != nil {
return "", fmt.Errorf("qemu binary not found in PATH: %s", qemuBinary)
}
return filepath.Base(path), nil
}
// If the tests are running on CI, or if there is an assertion failure in the executor,
// report a fatal error. Otherwise, assume cross-arch execution does not work, and skip
// the test.
func handleCrossArchError(t *testing.T, err error) {
if os.Getenv("CI") != "" || strings.Contains(err.Error(), "SYZFAIL:") {
t.Fatal(err)
} else {
t.Skipf("skipping, cross-arch execution failed: %v", err)
}
}
// 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()
dir := t.TempDir()
target, err := prog.GetTarget(runtime.GOOS, sysTarget.Arch)
if err != nil {
t.Fatal(err)
}
bin := csource.BuildExecutor(t, target, "../..")
if sysTarget.Arch == runtime.GOARCH || sysTarget.VMArch == runtime.GOARCH {
// Execute the tests natively.
if _, err := osutil.RunCmd(time.Minute, dir, bin, "test"); err != nil {
t.Fatal(err)
}
} else {
// Get QEMU binary for the target arch. This code might run inside Docker, so it cannot
// rely on binfmt_misc handlers provided by qemu-user.
qemu, err := qemuBinary(sysTarget.Arch)
if err != nil {
handleCrossArchError(t, err)
}
if _, err := osutil.RunCmd(time.Minute, dir, qemu, bin, "test"); err != nil {
handleCrossArchError(t, 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)
}
executor := csource.BuildExecutor(t, target, "../..")
source := queue.Plain()
startRPCServer(t, target, executor, source, rpcParams{manyProcs: true})
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)
}
req := &queue.Request{
Prog: p,
ReturnError: true,
ReturnOutput: true,
ExecOpts: flatrpc.ExecOpts{
EnvFlags: flatrpc.ExecEnvSandboxNone,
},
}
source.Submit(req)
res := req.Wait(context.Background())
if res.Err != nil {
t.Fatalf("program execution failed: %v\n%s", res.Err, res.Output)
}
if res.Info.Calls[0].Error != 0 {
t.Fatalf("data comparison failed: %v\n%s", res.Info.Calls[0].Error, res.Output)
}
}
}
func TestExecutorCommonExt(t *testing.T) {
t.Parallel()
target, err := prog.GetTarget("test", "64_fork")
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)
}
executor := csource.BuildExecutor(t, target, "../..", "-DSYZ_TEST_COMMON_EXT_EXAMPLE=1")
// The example setup_ext_test does:
// *(uint64*)(SYZ_DATA_OFFSET + 0x1234) = 0xbadc0ffee;
// The following program tests that that value is present at 0x1234.
test := `syz_compare(&(0x7f0000001234)="", 0x8, &(0x7f0000000000)=@blob="eeffc0ad0b000000", AUTO)`
p, err := target.Deserialize([]byte(test), prog.Strict)
if err != nil {
t.Fatal(err)
}
source := queue.Plain()
startRPCServer(t, target, executor, source, rpcParams{})
req := &queue.Request{
Prog: p,
ReturnError: true,
ReturnOutput: true,
ExecOpts: flatrpc.ExecOpts{
EnvFlags: flatrpc.ExecEnvSandboxNone,
},
}
source.Submit(req)
res := req.Wait(context.Background())
if res.Err != nil {
t.Fatalf("program execution failed: %v\n%s", res.Err, res.Output)
}
if call := res.Info.Calls[0]; call.Flags&flatrpc.CallFlagFinished == 0 || call.Error != 0 {
t.Fatalf("bad call result: flags=%x errno=%v", call.Flags, call.Error)
}
}
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