go122-syscall-steal-proc-sitting-in-syscall.go

     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  // Tests syscall P stealing from a goroutine and thread
     6  // that have been in a syscall the entire generation.
     7  
     8  package main
     9  
    10  import (
    11  	"internal/trace"
    12  	"internal/trace/internal/testgen"
    13  	"internal/trace/tracev2"
    14  	"internal/trace/version"
    15  )
    16  
    17  func main() {
    18  	testgen.Main(version.Go122, gen)
    19  }
    20  
    21  func gen(t *testgen.Trace) {
    22  	g := t.Generation(1)
    23  
    24  	// Steal proc from a goroutine that's been blocked
    25  	// in a syscall the entire generation.
    26  	b0 := g.Batch(trace.ThreadID(0), 0)
    27  	b0.Event("ProcStatus", trace.ProcID(0), tracev2.ProcSyscallAbandoned)
    28  	b0.Event("ProcSteal", trace.ProcID(0), testgen.Seq(1), trace.ThreadID(1))
    29  
    30  	// Status event for a goroutine blocked in a syscall for the entire generation.
    31  	bz := g.Batch(trace.NoThread, 0)
    32  	bz.Event("GoStatus", trace.GoID(1), trace.ThreadID(1), tracev2.GoSyscall)
    33  }
    34
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