go runtime_error ai_generated true

警告：数据竞争（协程读操作）

WARNING: DATA RACE (goroutine read)

ID: go/goroutine-race-condition-read

其他格式: JSON · Markdown 中文 · English
80%修复率
86%置信度
0证据数
2024-10-05首次发现

版本兼容性

版本状态引入弃用备注
1.21 active — — —
1.22 active — — —

根因分析

一个协程读取变量时，另一个协程在无同步的情况下写入该变量。

English

A goroutine reads a variable while another goroutine writes to it without synchronization.

generic

解决方案

  1. 97% 成功率 Use sync.RWMutex for read preference 
    var mu sync.RWMutex
var data map[string]int
read := func(key string) int {
    mu.RLock()
    defer mu.RUnlock()
    return data[key]
}
write := func(key string, val int) {
    mu.Lock()
    defer mu.Unlock()
    data[key] = val
}
  2. 95% 成功率 Use channels to communicate instead of shared memory 
    ch := make(chan int)
go func() {
    v := <-ch
    // use v
}()
ch <- 42

无效尝试

常见但无效的做法:

  1. Using a local copy of the variable 70% 失败

    The copy is made before the write, but the race still exists at the read point.

  2. Adding more goroutines to distribute load 85% 失败

    More goroutines increase the chance of race conditions.