// it has already been converted into a string by preprintpanics.
//
// To ensure that the traceback can be unambiguously parsed even when
// the panic value contains "\ngoroutine" and other stack-like
// strings, newlines in the string representation of v are replaced by
// "\n\t".
func printpanicval(v any) {
	switch v := v.(type) {
	case nil:
		print("nil")
	case bool:
		print(v)
	case int:

	EvUserTaskEnd     // end of a task [timestamp, internal task ID, stack ID]
	EvUserRegionBegin // trace.{Start,With}Region [timestamp, internal task ID, name string ID, stack ID]
	EvUserRegionEnd   // trace.{End,With}Region [timestamp, internal task ID, name string ID, stack ID]
	EvUserLog         // trace.Log [timestamp, internal task ID, key string ID, value string ID, stack]

	// Coroutines. Added in Go 1.23.

	traceEvGoCreateBlocked // goroutine creation (starts blocked) [timestamp, new goroutine ID, new stack ID, stack ID]

	// GoStatus with stack.
	traceEvGoStatusStack // goroutine status at the start of a generation, with a stack [timestamp, goroutine ID, M ID, status, stack ID]

	// Batch event for an experimental batch with a custom format.

	}
}

var http2goroutineSpace = []byte("goroutine ")

func http2curGoroutineID() uint64 {
	bp := http2littleBuf.Get().(*[]byte)
	defer http2littleBuf.Put(bp)
	b := *bp
	b = b[:runtime.Stack(b, false)]
	// Parse the 4707 out of "goroutine 4707 ["
	b = bytes.TrimPrefix(b, http2goroutineSpace)
	i := bytes.IndexByte(b, ' ')
	if i < 0 {
		panic(fmt.Sprintf("No space found in %q", b))
	}

// uploading, this process may attempt to upload approved counters
// to telemetry.go.dev.
//
// If [Config.ReportCrashes] is set, any fatal crash will be
// recorded by incrementing a counter named for the stack of the
// first running goroutine in the traceback.
//
// If either of these flags is set, Start re-executes the current
// executable as a child process, in a special mode in which it

// records with deep stack traces.
//
// TODO: Consider moving this to internal/runtime, see golang.org/issue/65355.
package profilerecord

type StackRecord struct {
	Stack []uintptr
}

type MemProfileRecord struct {
	AllocBytes, FreeBytes     int64
	AllocObjects, FreeObjects int64
	Stack                     []uintptr
}

func (e Event) Thread() ThreadID {
	return e.ctx.M
}

// Stack returns a handle to a stack associated with the event.
//
// This represents a stack trace at the current moment in time for
// the current execution context.
func (e Event) Stack() Stack {
	if e.base.typ == evSync {
		return NoStack
	}
	if e.base.typ == go122.EvCPUSample {
		return Stack{table: e.table, id: stackID(e.base.args[0])}
	}

				trace.HeapObjectExists(x, s.typePointersOfUnchecked(x).typ)
			}
			abits.advance()
		}
	}

	// Write out all the goroutine stacks.
	forEachGRace(func(gp *g) {
		trace.GoroutineStackExists(gp.stack.lo, gp.stack.hi-gp.stack.lo)
	})
	traceRelease(trace)
}

func traceSpanTypeAndClass(s *mspan) traceArg {
	if s.state.get() == mSpanInUse {
		return traceArg(s.spanclass) << 1
	}
	return traceArg(1)
}

		data="hello world\x00"

These events are identified in their spec by the HasData flag.

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

				if n == nil {
					residual = true
					continue
				}
				// Add cum weight to all nodes in stack, avoiding double counting.
				if _, ok := seenNode[n]; !ok {
					seenNode[n] = true
					n.addSample(dw, w, labels, sample.NumLabel, sample.NumUnit, o.FormatTag, false)
				}
				// Update edge weights for all edges in stack, avoiding double counting.
				if _, ok := seenEdge[nodePair{n, parent}]; !ok && parent != nil && n != parent {