saved += "\n\n"
				}
				saved += g
			}

			fmt.Print(saved)
			return
		}
		buf = make([]byte, 2*len(buf))
	}
}

func recurseThenCallGo(w chan struct{}, frames int, goroutines int, main bool) {
	if frames == 0 {
		// Signal to TracebackAncestors that we are done recursing and starting goroutines.
		w <- struct{}{}
		<-w
		return
	}
	if goroutines == 0 {

	// is if the stack grows (which it can't, udiv is nosplit)
	// or if a fault happens and more frames are added to
	// the stack due to deferred functions.
	// In the latter case, the stack can grow arbitrarily,
	// and garbage collection can happen, and those
	// operations care about pointers, but in that case
	// the calling frame is dead, and so are the saved
	// registers. So we can claim there are no pointers here.

				// A leaf function with no locals has no frame.
				p.From.Sym.Set(obj.AttrNoFrame, true)
			}

			if !p.From.Sym.NoFrame() {
				// If there is a stack frame at all, it includes
				// space to save the LR.
				c.autosize += 8
			}

			if c.autosize != 0 {
				extrasize := int32(0)
				if c.autosize%16 == 8 {
					// Allocate extra 8 bytes on the frame top to save FP
					extrasize = 8

	MOVW	R2, ret+8(FP)
	RET

// cgocallback(fn, frame unsafe.Pointer, ctxt uintptr)
// See cgocall.go for more details.
TEXT ·cgocallback(SB),NOSPLIT,$12-12
	NO_LOCAL_POINTERS

	// Skip cgocallbackg, just dropm when fn is nil, and frame is the saved g.
	// It is used to dropm while thread is exiting.
	MOVW	fn+0(FP), R5
	BNE	R5, loadg
	// Restore the g from frame.
	MOVW	frame+4(FP), g
	JMP	dropm

loadg:

	// where splice(2) will just return EINVAL; newer kernels support non-streams like UDP, but I really
	// doubt that splice(2) could help non-streams, cuz they usually send small frames respectively
	// and one splice call would result in one frame.
	// splice(2) is suitable for large data but the generation of fragments defeats its edge here.
	// Therefore, don't bother to try splice if the r is not a streaming descriptor.

 *  Fix: MockWebServer explicitly closes sockets. (On some Android releases,
    closing the input stream and output stream of a socket is not sufficient.
 *  Fix: Buffer outgoing HTTP/2 frames to limit how many outgoing frames are
    created.
 *  Fix: Avoid crashing when cache writing fails due to a full disk.
 *  Fix: Improve caching of private responses.
 *  Fix: Update cache-by-default response codes.

// and returns this as the name of a counter.
func telemetryCounterName(crash []byte) (string, error) {
	pcs, err := parseStackPCs(string(crash))
	if err != nil {
		return "", err
	}

	// Limit the number of frames we request.
	pcs = pcs[:min(len(pcs), 16)]

	if len(pcs) == 0 {
		// This can occur if all goroutines are idle, as when
		// caught in a deadlock, or killed by an async signal
		// while blocked.
		//

	MOV	ZERO, ZERO	// NOP

// func cgocallback(fn, frame unsafe.Pointer, ctxt uintptr)
// See cgocall.go for more details.
TEXT ·cgocallback(SB),NOSPLIT,$24-24
	NO_LOCAL_POINTERS

	// Skip cgocallbackg, just dropm when fn is nil, and frame is the saved g.
	// It is used to dropm while thread is exiting.
	MOV	fn+0(FP), X7
	BNE	ZERO, X7, loadg
	// Restore the g from frame.
	MOV	frame+8(FP), g
	JMP	dropm

loadg:

// for a single stack trace.
func printStackRecord(w io.Writer, stk []uintptr, allFrames bool) {
	show := allFrames
	frames := runtime.CallersFrames(stk)
	for {
		frame, more := frames.Next()
		name := frame.Function
		if name == "" {
			show = true
			fmt.Fprintf(w, "#\t%#x\n", frame.PC)
		} else if name != "runtime.goexit" && (show || !strings.HasPrefix(name, "runtime.")) {

		bv.n = -1
	}

	// Dump main body of stack frame.
	dumpint(tagStackFrame)
	dumpint(uint64(s.sp))                              // lowest address in frame
	dumpint(uint64(child.depth))                       // # of frames deep on the stack
	dumpint(uint64(uintptr(unsafe.Pointer(child.sp)))) // sp of child, or 0 if bottom of stack
	dumpmemrange(unsafe.Pointer(s.sp), s.fp-s.sp)      // frame contents
	dumpint(uint64(f.entry()))