b0.Event("GoSyscallBegin", testgen.Seq(1), testgen.NoStack)
	b0.Event("ProcStart", trace.ProcID(1), testgen.Seq(1))
	b0.Event("GoSyscallEndBlocked")

	// A running goroutine steals proc 0.
	b1 := g.Batch(trace.ThreadID(1), 0)
	b1.Event("ProcStatus", trace.ProcID(2), go122.ProcRunning)
	b1.Event("GoStatus", trace.GoID(2), trace.ThreadID(1), go122.GoRunning)

	return "Bad"
}

// ProcState represents the state of a proc.
//
// New ProcStates may be added in the future. Users of this type must be robust
// to that possibility.
type ProcState uint8

const (
	ProcUndetermined ProcState = iota // No information is known about the proc.
	ProcNotExist                      // Proc does not exist.
	ProcRunning                       // Proc is running.
	ProcIdle                          // Proc is idle.

				}
			}
		case trace.ResourceProc:
			// Basic state transition validation.
			id := tr.Resource.Proc()
			old, new := tr.Proc()
			if new == trace.ProcUndetermined {
				e.Errorf("transition to undetermined state for proc %d", id)
			}
			if v.seenSync && old == trace.ProcUndetermined {
				e.Errorf("undetermined proc %d after first global sync", id)
			}

	b0.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoRunning)
	b0.Event("GoSyscallBegin", testgen.Seq(1), testgen.NoStack)
	b0.Event("GoSyscallEndBlocked")

	// A running goroutine steals proc 0.
	b1 := g.Batch(trace.ThreadID(1), 0)
	b1.Event("ProcStatus", trace.ProcID(2), go122.ProcRunning)
	b1.Event("GoStatus", trace.GoID(2), trace.ThreadID(1), go122.GoRunning)

		return fmt.Errorf("expected no thread but had one")
	}

	// Check proc requirements.
	if reqs.Proc == event.MustHave && ctx.P == NoProc {
		return fmt.Errorf("expected a proc but didn't have one")
	} else if reqs.Proc == event.MustNotHave && ctx.P != NoProc {
		return fmt.Errorf("expected no proc but had one")
	}

	// Check goroutine requirements.

}

func (g *procGenerator) ProcTransition(ctx *traceContext, ev *trace.Event) {
	st := ev.StateTransition()
	proc := st.Resource.Proc()

	g.maxProc = max(g.maxProc, proc)
	viewerEv := traceviewer.InstantEvent{
		Resource: uint64(proc),
		Stack:    ctx.Stack(viewerFrames(ev.Stack())),
	}

	from, to := st.Proc()
	if from == to {
		// Filter out no-op events.
		return
	}
	if to.Executing() {

	b0.Event("GoSyscallBegin", testgen.Seq(1), testgen.NoStack)
	b0.Event("GoSyscallEnd")
	b0.Event("GoSyscallBegin", testgen.Seq(2), testgen.NoStack)
	b0.Event("GoSyscallEndBlocked")

	// A running goroutine steals proc 0.
	b1 := g.Batch(trace.ThreadID(1), 0)
	b1.Event("ProcStatus", trace.ProcID(2), go122.ProcRunning)
	b1.Event("GoStatus", trace.GoID(2), trace.ThreadID(1), go122.GoRunning)

	"internal/trace"
	"internal/trace/event/go122"
	testgen "internal/trace/internal/testgen/go122"
)

func main() {
	testgen.Main(gen)
}

func gen(t *testgen.Trace) {
	g := t.Generation(1)

	// Steal proc from a goroutine that's been blocked
	// in a syscall the entire generation.
	b0 := g.Batch(trace.ThreadID(0), 0)
	b0.Event("ProcStatus", trace.ProcID(0), go122.ProcSyscallAbandoned)

cui fliter <******@****.***> 1699009739 +0800

zirain <******@****.***> 1684861711 +0800