cockroach18101.go

     1  // Copyright 2025 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a MIT
     3  // license that can be found in the LICENSE file.
     4  
     5  /*
     6   * Project: cockroach
     7   * Issue or PR  : https://github.com/cockroachdb/cockroach/pull/18101
     8   * Buggy version: f7a8e2f57b6bcf00b9abaf3da00598e4acd3a57f
     9   * fix commit-id: 822bd176cc725c6b50905ea615023200b395e14f
    10   * Flaky: 100/100
    11   */
    12  
    13  package main
    14  
    15  import (
    16  	"context"
    17  	"os"
    18  	"runtime/pprof"
    19  	"time"
    20  )
    21  
    22  func init() {
    23  	register("Cockroach18101", Cockroach18101)
    24  }
    25  
    26  const chanSize_cockroach18101 = 6
    27  
    28  func restore_cockroach18101(ctx context.Context) bool {
    29  	readyForImportCh := make(chan bool, chanSize_cockroach18101)
    30  	go func() { // G2
    31  		defer close(readyForImportCh)
    32  		splitAndScatter_cockroach18101(ctx, readyForImportCh)
    33  	}()
    34  	for readyForImportSpan := range readyForImportCh {
    35  		select {
    36  		case <-ctx.Done():
    37  			return readyForImportSpan
    38  		}
    39  	}
    40  	return true
    41  }
    42  
    43  func splitAndScatter_cockroach18101(ctx context.Context, readyForImportCh chan bool) {
    44  	for i := 0; i < chanSize_cockroach18101+2; i++ {
    45  		readyForImportCh <- (false || i != 0)
    46  	}
    47  }
    48  
    49  func Cockroach18101() {
    50  	prof := pprof.Lookup("goroutineleak")
    51  	defer func() {
    52  		time.Sleep(100 * time.Millisecond)
    53  		prof.WriteTo(os.Stdout, 2)
    54  	}()
    55  	for i := 0; i < 100; i++ {
    56  		ctx, cancel := context.WithCancel(context.Background())
    57  		go restore_cockroach18101(ctx) // G1
    58  		go cancel()                    // helper goroutine
    59  	}
    60  }
    61
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