// The interface data work never contains a non-pointer
		// value. This case was copied over from older code
		// in the reflect package which only conditionally added
		// a pointer bit to the reflect.(Value).Call stack frame's
		// GC bitmap.
		ok = a.assignIntN(0, goarch.PtrSize, 1, 0b0)
		ptr = false
	}
	if !ok {
		a.stackAssign(goarch.PtrSize, goarch.PtrSize)
		return &a.steps[len(a.steps)-1], ptr
	}
	return nil, ptr

// gcc-compiled code on) and calls _cgo_Cfunc_f(frame).
//
// _cgo_Cfunc_f invokes the actual C function f with arguments
// taken from the frame structure, records the results in the frame,
// and returns to runtime.asmcgocall.
//
// After it regains control, runtime.asmcgocall switches back to the
// original g (m->curg)'s stack and returns to runtime.cgocall.
//

		// and registers that ever contain a pointer.
		if frame.varp != 0 {
			size := frame.varp - frame.sp
			if size > 0 {
				scanConservative(frame.sp, size, nil, gcw, state)
			}
		}

		// Scan arguments to this frame.
		if n := frame.argBytes(); n != 0 {
			// TODO: We could pass the entry argument map
			// to narrow this down further.
			scanConservative(frame.argp, n, nil, gcw, state)
		}

        events.contains([profile: "build ':' state", type: "O", frame: ":sub:ok"])
        events.contains([profile: "build ':' state", type: "C", frame: ":sub:ok"])

        and: "task type frame follows task path frame follows LocalTaskNode frame"
        def firstTaskNodeIndex = events.findIndexOf { it.frame == LocalTaskNode.name }
        firstTaskNodeIndex > 0

	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.

// 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.
		//

// 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()))

}

// Not all cgocallback frames are actually cgocallback,
// so not all have these arguments. Mark them uintptr so that the GC
// does not misinterpret memory when the arguments are not present.
// cgocallback is not called from Go, only from crosscall2.
// This in turn calls cgocallbackg, which is where we'll find
// pointer-declared arguments.
//
// When fn is nil (frame is saved g), call dropm instead,