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// Copyright 2023 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Tests syscall P stealing.
//
// Specifically, it tests a scenario where a thread 'steals'
// a P from itself. It's just a ProcStop with extra steps when
// it happens on the same P.
package main
import (
"internal/trace/v2"
"internal/trace/v2/event/go122"
testgen "internal/trace/v2/internal/testgen/go122"
)
func main() {
testgen.Main(gen)
}
func gen(t *testgen.Trace) {
t.DisableTimestamps()
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))
b0.Event("ProcStart", trace.ProcID(0), testgen.Seq(3))
b0.Event("GoSyscallEndBlocked")
}
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