pos      int       // next write offset in arr
	lenPos   int       // position of batch length value
}

// traceBuf is per-M tracing buffer.
//
// TODO(mknyszek): Rename traceBuf to traceBatch, since they map 1:1 with event batches.
type traceBuf struct {
	_ sys.NotInHeap
	traceBufHeader
	arr [64<<10 - unsafe.Sizeof(traceBufHeader{})]byte // underlying buffer for traceBufHeader.buf
}

// stack takes a stack trace skipping the provided number of frames.
// It then returns a traceArg representing that stack which may be
// passed to write.
func (tl traceLocker) stack(skip int) traceArg {
	return traceArg(traceStack(skip, nil, tl.gen))
}

// startPC takes a start PC for a goroutine and produces a unique
// stack ID for it.
//
// It then returns a traceArg representing that stack which may be
// passed to write.

func (s *pcinlineState) addBranch(ctxt *Link, globalIndex int) int {
	if globalIndex < 0 {
		return -1
	}

	localIndex, ok := s.globalToLocal[globalIndex]
	if ok {
		return localIndex
	}

	// Since tracebacks don't include column information, we could
	// use one node for multiple calls of the same function on the
	// same line (e.g., f(x) + f(y)). For now, we use one node for
	// each inlined call.

		"GOEXE=" + cfg.ExeSuffix,
		"GOEXPERIMENT=" + os.Getenv("GOEXPERIMENT"),
		"GOOS=" + runtime.GOOS,
		"TESTGO_GOHOSTOS=" + goHostOS,
		"GOPROXY=" + proxyURL,
		"GOPRIVATE=",
		"GOROOT=" + testGOROOT,
		"GOTRACEBACK=system",
		"TESTGONETWORK=panic", // allow only local connections by default; the [net] condition resets this
		"TESTGO_GOROOT=" + testGOROOT,
		"TESTGO_EXE=" + testGo,
		"TESTGO_VCSTEST_HOST=" + httpURL.Host,

	// To help debugging, immediately log version
	logger.Info("Starting", "version", version.Get())

	logger.Info("Golang settings", "GOGC", os.Getenv("GOGC"), "GOMAXPROCS", os.Getenv("GOMAXPROCS"), "GOTRACEBACK", os.Getenv("GOTRACEBACK"))

	// Start events processing pipeline.
	c.EventBroadcaster.StartStructuredLogging(0)
	c.EventBroadcaster.StartRecordingToSink(&v1core.EventSinkImpl{Interface: c.Client.CoreV1().Events("")})

}

// A ScopeID represents a lexical scope within a function.
type ScopeID int32

const (
	funcDupok      = 1 << iota // duplicate definitions ok
	funcWrapper                // hide frame from users (elide in tracebacks, don't count as a frame for recover())
	funcABIWrapper             // is an ABI wrapper (also set flagWrapper)
	funcNeedctxt               // function uses context register (has closure variables)

	// To help debugging, immediately log version
	klog.InfoS("Kubelet version", "kubeletVersion", version.Get())

	klog.InfoS("Golang settings", "GOGC", os.Getenv("GOGC"), "GOMAXPROCS", os.Getenv("GOMAXPROCS"), "GOTRACEBACK", os.Getenv("GOTRACEBACK"))

	if err := initForOS(s.KubeletFlags.WindowsService, s.KubeletFlags.WindowsPriorityClass); err != nil {
		return fmt.Errorf("failed OS init: %w", err)
	}

	// To help debugging, immediately log version
	logger.Info("Version info", "version", version.Get())

	logger.Info("Golang settings", "GOGC", os.Getenv("GOGC"), "GOMAXPROCS", os.Getenv("GOMAXPROCS"), "GOTRACEBACK", os.Getenv("GOTRACEBACK"))

	proxymetrics.RegisterMetrics(s.Config.Mode)

	// TODO(vmarmol): Use container config for this.
	var oomAdjuster *oom.OOMAdjuster
	if s.Config.OOMScoreAdj != nil {

	}
	exe, err := os.Executable()
	if err != nil {
		t.Fatal(err)
	}
	cmd := testenv.CleanCmdEnv(testenv.Command(t, exe, "-test.run=TestWERDialogue"))
	cmd.Env = append(cmd.Env, "TEST_WER_DIALOGUE=1", "GOTRACEBACK=wer")
	// Child process should not open WER dialogue, but return immediately instead.
	// The exit code can't be reliably tested here because Windows can change it.
	_, err = cmd.CombinedOutput()
	if err == nil {

		// the signal to the os/signal API. If nothing is looking
		// for (or explicitly ignoring) SIGSEGV, then it crashes.
		// Because the Go runtime is invoked via a c-archive,
		// it treats this as GOTRACEBACK=crash, meaning that it
		// dumps a stack trace for all goroutines, which it does
		// by raising SIGQUIT. The effect is that we will see the
		// program die with SIGQUIT in that case, not SIGSEGV.