// The msan tests require support for the -msan option.
	if !compilerRequiredTsanVersion(goos, goarch) {
		t.Skipf("skipping on %s/%s; compiler version for -tsan option is too old.", goos, goarch)
	}

	t.Parallel()
	requireOvercommit(t)
	config := configure("thread")
	config.skipIfCSanitizerBroken(t)

	mustRun(t, config.goCmd("build", "std"))

	cases := []struct {
		src          string
		needsRuntime bool
	}{
		{src: "tsan.go"},

	"strconv"
	"strings"
	"sync"
	"syscall"
	"testing"
	"time"
	"unicode"
)

var overcommit struct {
	sync.Once
	value int
	err   error
}

// requireOvercommit skips t if the kernel does not allow overcommit.
func requireOvercommit(t *testing.T) {
	t.Helper()

	overcommit.Once.Do(func() {
		var out []byte
		out, overcommit.err = os.ReadFile("/proc/sys/vm/overcommit_memory")
		if overcommit.err != nil {