func G0StackOverflow() {
	systemstack(func() {
		g0 := getg()
		sp := getcallersp()
		// The stack bounds for g0 stack is not always precise.
		// Use an artificially small stack, to trigger a stack overflow
		// without actually run out of the system stack (which may seg fault).
		g0.stack.lo = sp - 4096 - stackSystem
		g0.stackguard0 = g0.stack.lo + stackGuard
		g0.stackguard1 = g0.stackguard0

		stackOverflow(nil)
	})
}

	}
	pf, err := Parse(name, data)
	if err != nil {
		return nil, fmt.Errorf("failed to parse: %v", err)
	}
	return pf, nil
}

// ReadFile reads the counters and stack counters from the given file.
// This is the implementation of x/telemetry/counter/countertest.Read
func ReadFile(name string) (counters, stackCounters map[string]uint64, _ error) {

	default:
		// Push n onto stack.
		r.stack = append(r.stack, n)
		if nfor, ok := forRangeFunc(n); ok {
			loop := &forLoop{nfor: nfor, depth: 1 + len(r.forStack)}
			r.forStack = append(r.forStack, loop)
			r.startLoop(loop)
		}

	case nil:
		// n == nil signals that we are done visiting
		// the top-of-stack node's children. Find it.
		n = r.stack[len(r.stack)-1]

			if elim[v] == nil {
				elim[v] = n
				changed = true
			}
			return
		case OpVarLive:
			// Don't delete the auto if it needs to be kept alive.

			// We depend on this check to keep the autotmp stack slots
			// for open-coded defers from being removed (since they
			// may not be used by the inline code, but will be used by
			// panic processing).
			n, ok := v.Aux.(*ir.Name)
			if !ok || n.Class != ir.PAUTO {

	length.SetTypecheck(1)
	return ptr, length
}

// mayCall reports whether evaluating expression n may require
// function calls, which could clobber function call arguments/results
// currently on the stack.
func mayCall(n ir.Node) bool {
	// When instrumenting, any expression might require function calls.
	if base.Flag.Cfg.Instrumenting {
		return true
	}

	isSoftFloat := func(typ *types.Type) bool {

//
// The heap lock must not be held over this operation, since it will briefly acquire
// the heap lock.
//
// Must be called on the system stack because it acquires the heap lock.
//
//go:systemstack
func (p *pageAlloc) enableChunkHugePages() {
	// Grab the heap lock to turn on huge pages for new chunks and clone the current
	// heap address space ranges.
	//

	/gc/scan/heap:bytes
		The total amount of heap space that is scannable.

	/gc/scan/stack:bytes
		The number of bytes of stack that were scanned last GC cycle.

	/gc/scan/total:bytes
		The total amount space that is scannable. Sum of all metrics in
		/gc/scan.

	/gc/stack/starting-size:bytes
		The stack size of new goroutines.

	/godebug/non-default-behavior/execerrdot:events

var errClosed = errors.New("i/o operation on closed connection")

// ServerConn is an artifact of Go's early HTTP implementation.
// It is low-level, old, and unused by Go's current HTTP stack.
// We should have deleted it before Go 1.
//
// Deprecated: Use the Server in package [net/http] instead.
type ServerConn struct {
	mu              sync.Mutex // read-write protects the following fields

	phaseName := "init"
	defer func() {
		if phaseName != "" {
			err := recover()
			stack := make([]byte, 16384)
			n := runtime.Stack(stack, false)
			stack = stack[:n]
			if f.HTMLWriter != nil {
				f.HTMLWriter.flushPhases()
			}
			f.Fatalf("panic during %s while compiling %s:\n\n%v\n\n%s\n", phaseName, f.Name, err, stack)
		}
	}()

	// Run all the passes
	if f.Log() {
		printFunc(f)
	}

		return "reflect: call of " + e.Method + " on zero Value"
	}
	return "reflect: call of " + e.Method + " on " + e.Kind.String() + " Value"
}

// methodName returns the name of the calling method,
// assumed to be two stack frames above.
func methodName() string {
	pc, _, _, _ := runtime.Caller(2)
	f := runtime.FuncForPC(pc)
	if f == nil {
		return "unknown method"
	}
	return f.Name()
}