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✏️ pipe.go

// 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.

// Tests a goroutine sitting blocked in a syscall for
// an entire generation. This is a regression test for
// #65196.

//go:build ignore

package main

import (
	"log"
	"os"
	"runtime/trace"
	"syscall"
	"time"
)

func main() {
	// Create a pipe to block on.
	var p [2]int
	if err := syscall.Pipe(p[:]); err != nil {
		log.Fatalf("failed to create pipe: %v", err)
	}
	rfd, wfd := p[0], p[1]

// Create a goroutine that blocks on the pipe.
	done := make(chan struct{})
	go func() {
		var data [1]byte
		_, err := syscall.Read(rfd, data[:])
		if err != nil {
			log.Fatalf("failed to read from pipe: %v", err)
		}
		done <- struct{}{}
	}()

// Give the goroutine ample chance to block on the pipe.
	time.Sleep(10 * time.Millisecond)

// Start tracing.
	if err := trace.Start(os.Stdout); err != nil {
		log.Fatalf("failed to start tracing: %v", err)
	}

// This isn't enough to have a full generation pass by default,
	// but it is generally enough in stress mode.
	time.Sleep(100 * time.Millisecond)

// Write to the pipe to unblock it.
	if _, err := syscall.Write(wfd, []byte{10}); err != nil {
		log.Fatalf("failed to write to pipe: %v", err)
	}

// Wait for the goroutine to unblock and start running.
	// This is helpful to catch incorrect information written
	// down for the syscall-blocked goroutine, since it'll start
	// executing, and that execution information will be
	// inconsistent.
	<-done

// Stop tracing.
	trace.Stop()
}

Batal

⬅ testdata 12 item

Nama	Tipe	Ukuran	Diubah	Aksi
🔵annotations-stress.go	go	1.8 KB	2024-02-02 18:09	✏️ 👁️
🔵annotations.go	go	1.4 KB	2024-02-02 18:09	✏️ 👁️
🔵cgo-callback.go	go	1.3 KB	2024-02-02 18:09	✏️ 👁️
🔵cpu-profile.go	go	3.8 KB	2024-02-02 18:09	✏️ 👁️
🔵futile-wakeup.go	go	1.8 KB	2024-02-02 18:09	✏️ 👁️
🔵gc-stress.go	go	1.5 KB	2024-02-02 18:09	✏️ 👁️
🔵gomaxprocs.go	go	967 B	2024-02-02 18:09	✏️ 👁️
🔵many-start-stop.go	go	786 B	2024-02-02 18:09	✏️ 👁️
🔵stacks.go	go	2.4 KB	2024-02-02 18:09	✏️ 👁️
🔵stress-start-stop.go	go	2.7 KB	2024-02-02 18:09	✏️ 👁️
🔵stress.go	go	2.5 KB	2024-02-02 18:09	✏️ 👁️
🔵wait-on-pipe.go	go	1.6 KB	2024-02-02 18:09	✏️ 👁️

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