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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.
// Code generated by "gen.bash" from internal/trace; DO NOT EDIT.
//go:build go1.23
// Tests syscall P stealing.
//
// Specifically, it tests a scenario wherein, without a
// P sequence number of GoSyscallBegin, the syscall that
// a ProcSteal applies to is ambiguous. This only happens in
// practice when the events aren't already properly ordered
// by timestamp, since the ProcSteal won't be seen until after
// the correct GoSyscallBegin appears on the frontier.
package main
import (
"golang.org/x/exp/trace"
"golang.org/x/exp/trace/internal/testgen"
"golang.org/x/exp/trace/internal/tracev2"
"golang.org/x/exp/trace/internal/version"
)
func main() {
testgen.Main(version.Go122, gen)
}
func gen(t *testgen.Trace) {
t.DisableTimestamps()
g := t.Generation(1)
// One goroutine does a syscall without blocking, then another one where
// it's P gets stolen.
b0 := g.Batch(trace.ThreadID(0), 0)
b0.Event("ProcStatus", trace.ProcID(0), tracev2.ProcRunning)
b0.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), tracev2.GoRunning)
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), tracev2.ProcRunning)
b1.Event("GoStatus", trace.GoID(2), trace.ThreadID(1), tracev2.GoRunning)
b1.Event("ProcSteal", trace.ProcID(0), testgen.Seq(3), trace.ThreadID(0))
}
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