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// Copyright 2025 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 tooltest
import (
"encoding/json"
"flag"
"fmt"
"os"
"path/filepath"
"testing"
"github.com/google/go-cmp/cmp"
"github.com/google/syzkaller/pkg/clangtool"
"github.com/google/syzkaller/pkg/osutil"
"github.com/google/syzkaller/pkg/testutil"
)
var (
FlagBin = flag.String("bin", "", "path to the clang tool binary to use")
FlagUpdate = flag.Bool("update", false, "update golden files")
)
func TestClangTool[Output any, OutputPtr clangtool.OutputDataPtr[Output]](t *testing.T) {
if *FlagBin == "" {
t.Skipf("clang tool path is not specified, run with -bin=clangtool flag")
}
ForEachTestFile(t, func(t *testing.T, cfg *clangtool.Config, file string) {
out, err := clangtool.Run[Output, OutputPtr](cfg)
if err != nil {
t.Fatal(err)
}
got, err := json.MarshalIndent(out, "", "\t")
if err != nil {
t.Fatal(err)
}
CompareGoldenData(t, file+".json", got)
})
}
func ForEachTestFile(t *testing.T, fn func(t *testing.T, cfg *clangtool.Config, file string)) {
forEachTestFile(t, func(t *testing.T, file string) {
t.Run(filepath.Base(file), func(t *testing.T) {
t.Parallel()
buildDir := t.TempDir()
commands := fmt.Sprintf(`[{
"file": "%s",
"directory": "%s",
"command": "clang -c %s -DKBUILD_BASENAME=foo"
}]`,
file, buildDir, file)
dbFile := filepath.Join(buildDir, "compile_commands.json")
if err := os.WriteFile(dbFile, []byte(commands), 0600); err != nil {
t.Fatal(err)
}
cfg := &clangtool.Config{
ToolBin: *FlagBin,
KernelSrc: osutil.Abs("testdata"),
KernelObj: buildDir,
CacheFile: filepath.Join(buildDir, filepath.Base(file)+".json"),
DebugTrace: &testutil.Writer{TB: t},
}
fn(t, cfg, file)
})
})
}
func forEachTestFile(t *testing.T, fn func(t *testing.T, file string)) {
files, err := filepath.Glob(filepath.Join(osutil.Abs("testdata"), "*.c"))
if err != nil {
t.Fatal(err)
}
if len(files) == 0 {
t.Fatal("found no source files")
}
for _, file := range files {
fn(t, file)
}
}
func CompareGoldenFile(t *testing.T, goldenFile, gotFile string) {
got, err := os.ReadFile(gotFile)
if err != nil {
t.Fatal(err)
}
CompareGoldenData(t, goldenFile, got)
}
func CompareGoldenData(t *testing.T, goldenFile string, got []byte) {
if *FlagUpdate {
if err := os.WriteFile(goldenFile, got, 0644); err != nil {
t.Fatal(err)
}
}
want, err := os.ReadFile(goldenFile)
if err != nil {
t.Fatal(err)
}
if diff := cmp.Diff(want, got); diff != "" {
t.Fatal(diff)
}
}
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