</a>
    </div>
    <div class="item">

The second special case consists of stack events. These events are identified
by the IsStack flag. These events also have a trailing unsigned integer argument
describing the number of stack frame descriptors that follow. Each stack frame
descriptor is on its own line following the event, consisting of four signed
integer arguments: the PC, an integer describing the function name, an integer

				}
				r := frame
				if argRegs > 0 {
					r = unsafe.Pointer(&regs.Ints)
				} else {
					// frame is effectively uninitialized
					// memory. That means we have to clear
					// it before writing to it to avoid
					// confusing the write barrier.
					*(*[2]uintptr)(frame) = [2]uintptr{}
				}
				switch f.fint.Kind_ & abi.KindMask {
				case abi.Pointer:
					// direct use of pointer

// these pointers in regArgs.Ptrs such that they are visible to the GC.
//
// Package reflect passes a frame type. In package runtime, there is only
// one call that copies results back, in callbackWrap in syscall_windows.go, and it
// does NOT pass a frame type, meaning there are no write barriers invoked. See that
// call site for justification.
//
// Package reflect accesses this symbol through a linkname.
//

		// Compatibility hack.
		p.From.Sym.Set(obj.AttrNoFrame, true)
		textstksiz = 0
	}
	if textstksiz%8 != 0 {
		c.ctxt.Diag("frame size %d not a multiple of 8", textstksiz)
	}
	if p.From.Sym.NoFrame() {
		if textstksiz != 0 {
			c.ctxt.Diag("NOFRAME functions must have a frame size of 0, not %d", textstksiz)
		}
	}

	c.cursym.Func().Args = p.To.Val.(int32)
	c.cursym.Func().Locals = int32(textstksiz)

			filtered.Events = append(filtered.Events, e)
		}
	}
	return
}

func stackFrames(data *format.Data, stackID int) (frames []string) {
	for {
		frame, ok := data.Frames[strconv.Itoa(stackID)]
		if !ok {
			return
		}
		frames = append(frames, frame.Name)
		stackID = frame.Parent
	}
}

func checkProcStartStop(t *testing.T, data format.Data) {
	procStarted := map[uint64]bool{}

}

//go:generate go run mkpreempt.go

// asyncPreempt saves all user registers and calls asyncPreempt2.
//
// When stack scanning encounters an asyncPreempt frame, it scans that
// frame and its parent frame conservatively.
//
// asyncPreempt is implemented in assembly.
func asyncPreempt()

//go:nosplit
func asyncPreempt2() {
	gp := getg()
	gp.asyncSafePoint = true

	// if tlsConfig != nil {
	// 	trhttp2, _ := http2.ConfigureTransports(tr)
	// 	if trhttp2 != nil {
	// 		// ReadIdleTimeout is the timeout after which a health check using ping
	// 		// frame will be carried out if no frame is received on the
	// 		// connection. 5 minutes is sufficient time for any idle connection.
	// 		trhttp2.ReadIdleTimeout = 5 * time.Minute

		if m0.Bounds() != m1.Bounds() {
			t.Errorf("frame %d: bounds differ: %v and %v", i, m0.Bounds(), m1.Bounds())
		}
		d0, d1 := g0.Delay[i], g1.Delay[i]
		if d0 != d1 {
			t.Errorf("frame %d: delay values differ: %d and %d", i, d0, d1)
		}
		p0, p1 := uint8(0), g1.Disposal[i]
		if go1Dot5Fields {
			p0 = DisposalNone
		}
		if p0 != p1 {
			t.Errorf("frame %d: disposal values differ: %d and %d", i, p0, p1)
		}

				return Event{}, fmt.Errorf("unexpected EOF while reading stack: args=%v", args)
			}
			if err != nil {
				return Event{}, err
			}
			frame, err := readArgs(line, frameFields)
			if err != nil {
				return Event{}, err
			}
			args = append(args, frame...)
		}
	}
	var data []byte
	if spec.HasData {
		line, err := r.nextLine()
		if err == io.EOF {