mp.printlock++
	if mp.printlock == 1 {
		lock(&debuglock)
	}
	mp.locks-- // now we know debuglock is held and holding up mp.locks for us.
}

func printunlock() {
	mp := getg().m
	mp.printlock--
	if mp.printlock == 0 {
		unlock(&debuglock)
	}
}

// write to goroutine-local buffer if diverting output,
// or else standard error.
func gwrite(b []byte) {

// even though l is not actually locked yet.
func lockWithRank(l *mutex, rank lockRank) {
	if l == &debuglock || l == &paniclk || l == &raceFiniLock {
		// debuglock is only used for println/printlock(). Don't do lock
		// rank recording for it, since print/println are used when
		// printing out a lock ordering problem below.
		//
		// paniclk is only used for fatal throw/panic. Don't do lock

}

// Print emits a to this Shell's output stream, formatting it like fmt.Print.
// It is safe to call concurrently.
func (sh *Shell) Print(a ...any) {
	sh.printLock.Lock()
	defer sh.printLock.Unlock()
	sh.printFunc(a...)
}

func (sh *Shell) printLocked(a ...any) {
	sh.printFunc(a...)
}

// WithAction returns a Shell identical to sh, but bound to Action a.
func (sh *Shell) WithAction(a *Action) *Shell {
	sh2 := *sh

func lfnodeValidate(node *lfnode) {
	if base, _, _ := findObject(uintptr(unsafe.Pointer(node)), 0, 0); base != 0 {
		throw("lfstack node allocated from the heap")
	}
	if lfstackUnpack(lfstackPack(node, ^uintptr(0))) != node {
		printlock()
		println("runtime: bad lfnode address", hex(uintptr(unsafe.Pointer(node))))
		throw("bad lfnode address")
	}
}

func lfstackPack(node *lfnode, cnt uintptr) uint64 {

// and otherwise sets obj's checkmark. It returns true if obj was
// already checkmarked.
func setCheckmark(obj, base, off uintptr, mbits markBits) bool {
	if !mbits.isMarked() {
		printlock()
		print("runtime: checkmarks found unexpected unmarked object obj=", hex(obj), "\n")
		print("runtime: found obj at *(", hex(base), "+", hex(off), ")\n")

		// Dump the source (base) object

package runtime

import "unsafe"

var (
	writeHeader = []byte{6 /* ANDROID_LOG_ERROR */, 'G', 'o', 0}
	writePath   = []byte("/dev/log/main\x00")
	writeLogd   = []byte("/dev/socket/logdw\x00")

	// guarded by printlock/printunlock.
	writeFD  uintptr
	writeBuf [1024]byte
	writePos int
)

// Prior to Android-L, logging was done through writes to /dev/log files implemented

	{"runtime.printuintptr", 1},
	{"runtime.printiface", 1},
	{"runtime.printeface", 1},
	{"runtime.printslice", 1},
	{"runtime.printnl", 1},
	{"runtime.printsp", 1},
	{"runtime.printlock", 1},
	{"runtime.printunlock", 1},
	{"runtime.concatstring2", 1},
	{"runtime.concatstring3", 1},
	{"runtime.concatstring4", 1},
	{"runtime.concatstring5", 1},
	{"runtime.concatstrings", 1},
	{"runtime.cmpstring", 1},

func printstring(string)
func printpointer(any)
func printuintptr(uintptr)
func printiface(any)
func printeface(any)
func printslice(any)
func printnl()
func printsp()
func printlock()
func printunlock()

func concatstring2(*[32]byte, string, string) string
func concatstring3(*[32]byte, string, string, string) string
func concatstring4(*[32]byte, string, string, string, string) string

	{"printuintptr", funcTag, 31},
	{"printiface", funcTag, 30},
	{"printeface", funcTag, 30},
	{"printslice", funcTag, 30},
	{"printnl", funcTag, 9},
	{"printsp", funcTag, 9},
	{"printlock", funcTag, 9},
	{"printunlock", funcTag, 9},
	{"concatstring2", funcTag, 34},
	{"concatstring3", funcTag, 35},
	{"concatstring4", funcTag, 36},
	{"concatstring5", funcTag, 37},
	{"concatstrings", funcTag, 39},

			continue
		}
		obj.setRecord(nil) // Don't scan it again.
		if stackTraceDebug {
			printlock()
			print("  live stkobj at", hex(state.stack.lo+uintptr(obj.off)), "of size", obj.size)
			if conservative {
				print(" (conservative)")
			}
			println()
			printunlock()
		}
		gcdata := r.gcdata()
		var s *mspan
		if r.useGCProg() {