g := t.Generation(1)

	// A goroutine execute a syscall and steals its own P, then starts running
	// on that P.
	b0 := g.Batch(trace.ThreadID(0), 0)
	b0.Event("ProcStatus", trace.ProcID(0), go122.ProcRunning)
	b0.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoRunning)
	b0.Event("GoSyscallBegin", testgen.Seq(1), testgen.NoStack)
	b0.Event("ProcSteal", trace.ProcID(0), testgen.Seq(2), trace.ThreadID(0))

-- expect --
SUCCESS
-- trace --
Trace Go1.22
EventBatch gen=1 m=0 time=0 size=37
GoCreateSyscall dt=1 new_g=4
GoSyscallEndBlocked dt=1
ProcStatus dt=1 p=0 pstatus=2
ProcStart dt=1 p=0 p_seq=1
GoStatus dt=1 g=4 m=18446744073709551615 gstatus=1
GoStart dt=1 g=4 g_seq=1
GoSyscallBegin dt=1 p_seq=2 stack=0
GoDestroySyscall dt=1
EventBatch gen=1 m=0 time=0 size=13
ProcStatus dt=1 p=1 pstatus=2
ProcStart dt=1 p=1 p_seq=1

}

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

	// One goroutine enters a syscall.
	b0 := g.Batch(trace.ThreadID(0), 0)
	b0.Event("ProcStatus", trace.ProcID(0), go122.ProcRunning)
	b0.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoRunning)
	b0.Event("GoSyscallBegin", testgen.Seq(1), testgen.NoStack)
	b0.Event("GoSyscallEndBlocked")

	// A bare M steals the goroutine's P.
	b1 := g.Batch(trace.ThreadID(1), 0)

	g := t.Generation(1)

	// One goroutine is exiting with a syscall. It already
	// acquired a new P.
	b0 := g.Batch(trace.ThreadID(0), 0)
	b0.Event("ProcStatus", trace.ProcID(1), go122.ProcRunning)
	b0.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoSyscall)
	b0.Event("GoSyscallEndBlocked")

	// A bare M stole the goroutine's P at the generation boundary.
	b1 := g.Batch(trace.ThreadID(1), 0)

	b0 := g.Batch(trace.ThreadID(0), 0)
	b0.Event("ProcStatus", trace.ProcID(1), go122.ProcIdle)
	b0.Event("ProcStatus", trace.ProcID(0), go122.ProcRunning)
	b0.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoRunning)
	b0.Event("GoSyscallBegin", testgen.Seq(1), testgen.NoStack)
	b0.Event("ProcStart", trace.ProcID(1), testgen.Seq(1))
	b0.Event("GoSyscallEndBlocked")

-- expect --
SUCCESS
-- trace --
Trace Go1.22
EventBatch gen=1 m=0 time=0 size=11
ProcStatus dt=1 p=1 pstatus=1
GoStatus dt=1 g=1 m=0 gstatus=3
GoSyscallEndBlocked dt=1
EventBatch gen=1 m=1 time=0 size=9
ProcStatus dt=1 p=0 pstatus=4
ProcSteal dt=1 p=0 p_seq=1 m=0
EventBatch gen=1 m=18446744073709551615 time=0 size=5
Frequency freq=15625000
EventBatch gen=1 m=18446744073709551615 time=0 size=1
Stacks

-- expect --
SUCCESS
-- trace --
Trace Go1.22
EventBatch gen=1 m=0 time=0 size=23
ProcStatus dt=1 p=1 pstatus=2
ProcStatus dt=1 p=0 pstatus=1
GoStatus dt=1 g=1 m=0 gstatus=2
GoSyscallBegin dt=1 p_seq=1 stack=0
ProcStart dt=1 p=1 p_seq=1
GoSyscallEndBlocked dt=1
EventBatch gen=1 m=1 time=0 size=5
ProcSteal dt=1 p=0 p_seq=2 m=0
EventBatch gen=1 m=18446744073709551615 time=0 size=5
Frequency freq=15625000

	traceEvGoSwitchDestroy // goroutine switch and destroy [timestamp, goroutine ID, goroutine seq]
	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.

		Args:         []string{"dt", "id"},
		IsTimedEvent: true,
		Experiment:   AllocFree,
	},
}

type GoStatus uint8

const (
	GoBad GoStatus = iota
	GoRunnable
	GoRunning
	GoSyscall
	GoWaiting
)

func (s GoStatus) String() string {
	switch s {
	case GoRunnable:
		return "Runnable"
	case GoRunning:
		return "Running"
	case GoSyscall:

GoStart dt=10 g=1 g_seq=2
UserRegionBegin dt=278 task=0 name_string=29 stack=23
EventBatch gen=1 m=18446744073709551615 time=28113086280061 size=57
GoStatus dt=318 g=2 m=18446744073709551615 gstatus=4
GoStatus dt=3 g=3 m=18446744073709551615 gstatus=4
GoStatus dt=1 g=4 m=18446744073709551615 gstatus=4
GoStatus dt=1 g=5 m=18446744073709551615 gstatus=4
EventBatch gen=1 m=18446744073709551615 time=28113086280852 size=488
Stacks
Stack id=17 nframes=3