golang.org/x/exp@v0.0.0-20240506185415-9bf2ced13842/trace/testdata/generators/go122-syscall-steal-proc-gen-boundary-bare-m.go (about)

     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  // Tests syscall P stealing at a generation boundary.
    10  
    11  package main
    12  
    13  import (
    14  	"golang.org/x/exp/trace"
    15  	"golang.org/x/exp/trace/internal/event/go122"
    16  	testgen "golang.org/x/exp/trace/internal/testgen/go122"
    17  )
    18  
    19  func main() {
    20  	testgen.Main(gen)
    21  }
    22  
    23  func gen(t *testgen.Trace) {
    24  	g := t.Generation(1)
    25  
    26  	// One goroutine is exiting with a syscall. It already
    27  	// acquired a new P.
    28  	b0 := g.Batch(trace.ThreadID(0), 0)
    29  	b0.Event("ProcStatus", trace.ProcID(1), go122.ProcRunning)
    30  	b0.Event("GoStatus", trace.GoID(1), trace.ThreadID(0), go122.GoSyscall)
    31  	b0.Event("GoSyscallEndBlocked")
    32  
    33  	// A bare M stole the goroutine's P at the generation boundary.
    34  	b1 := g.Batch(trace.ThreadID(1), 0)
    35  	b1.Event("ProcStatus", trace.ProcID(0), go122.ProcSyscallAbandoned)
    36  	b1.Event("ProcSteal", trace.ProcID(0), testgen.Seq(1), trace.ThreadID(0))
    37  }