// do here, we only want to report full records.
			continue
		}

		// Construct the stack for insertion to the stack table.
		nstk := 1
		pcBuf[0] = logicalStackSentinel
		for ; nstk < len(pcBuf) && nstk-1 < len(stk); nstk++ {
			pcBuf[nstk] = uintptr(stk[nstk-1])
		}

		// Write out a trace event.
		w := unsafeTraceWriter(gen, trace.cpuBuf[gen%2])

		// Ensure we have a place to write to.

//
// This is a convenience function for easily adding correct
// stacks to traces.
func (g *Generation) Stack(stk []trace.StackFrame) uint64 {
	if len(stk) == 0 {
		return 0
	}
	if len(stk) > 32 {
		panic("stack too big for test")
	}
	var stkc stack
	copy(stkc.stk[:], stk)
	stkc.len = len(stk)
	if id, ok := g.stacks[stkc]; ok {
		return id
	}
	id := uint64(len(g.stacks) + 1)
	g.stacks[stkc] = id

					stk = stk[i:]
					break
				}
			}
			locs = b.appendLocsForStack(locs[:0], stk)
			if len(locs) > 0 {
				break
			}
			hideRuntime = false // try again, and show all frames next time.
		}

		values[0], values[1] = scaleHeapSample(r.AllocObjects, r.AllocBytes, rate)
		values[2], values[3] = scaleHeapSample(r.InUseObjects(), r.InUseBytes(), rate)
		var blockSize int64

	"time"
)

// viewerFrames returns the frames of the stack of ev. The given frame slice is
// used to store the frames to reduce allocations.
func viewerFrames(stk trace.Stack) []*trace.Frame {
	var frames []*trace.Frame
	stk.Frames(func(f trace.StackFrame) bool {
		frames = append(frames, &trace.Frame{
			PC:   f.PC,
			Fn:   f.Func,
			File: f.File,
			Line: int(f.Line),
		})
		return true
	})

		// TODO: Is it safe to osyield here? https://go.dev/issue/52672
		osyield()
	}

	if cpuprof.numExtra+1+len(stk) < len(cpuprof.extra) {
		i := cpuprof.numExtra
		cpuprof.extra[i] = uintptr(1 + len(stk))
		copy(cpuprof.extra[i+1:], stk)
		cpuprof.numExtra += 1 + len(stk)
	} else {
		cpuprof.lostExtra++
	}

	prof.signalLock.Store(0)
}

// addExtra adds the "extra" profiling events,