go122-go-create-without-running-g.go

Documentation: golang.org/x/exp/trace/testdata/generators

     1  // Copyright 2023 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // Code generated by "gen.bash" from internal/trace/v2; DO NOT EDIT.
     6  
     7  //go:build go1.21
     8  
     9  // Regression test for an issue found in development.
    10  //
    11  // GoCreate events can happen on bare Ps in a variety of situations and
    12  // and earlier version of the parser assumed this wasn't possible. At
    13  // the time of writing, one such example is goroutines created by expiring
    14  // timers.
    15  
    16  package main
    17  
    18  import (
    19  	"golang.org/x/exp/trace"
    20  	"golang.org/x/exp/trace/internal/event/go122"
    21  	testgen "golang.org/x/exp/trace/internal/testgen/go122"
    22  )
    23  
    24  func main() {
    25  	testgen.Main(gen)
    26  }
    27  
    28  func gen(t *testgen.Trace) {
    29  	g1 := t.Generation(1)
    30  
    31  	// A goroutine gets created on a running P, then starts running.
    32  	b0 := g1.Batch(trace.ThreadID(0), 0)
    33  	b0.Event("ProcStatus", trace.ProcID(0), go122.ProcRunning)
    34  	b0.Event("GoCreate", trace.GoID(5), testgen.NoStack, testgen.NoStack)
    35  	b0.Event("GoStart", trace.GoID(5), testgen.Seq(1))
    36  	b0.Event("GoStop", "whatever", testgen.NoStack)
    37  }
    38

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