go
runtime_error
ai_generated
true
警告:数据竞争:协程X写入,协程Y读取(全局变量)
WARNING: DATA RACE: Write by goroutine X, Read by goroutine Y (global variable)
ID: go/goroutine-racy-global-variable
80%修复率
89%置信度
0证据数
2026-04-18首次发现
版本兼容性
| 版本 | 状态 | 引入 | 弃用 | 备注 |
|---|---|---|---|---|
| 1.0 | active | — | — | — |
| 1.22 | active | — | — | — |
根因分析
多个协程在没有同步的情况下访问全局变量。
English
Multiple goroutines accessing a global variable without synchronization.
解决方案
-
95% 成功率 Use sync.Mutex to protect global variable
var mu sync.Mutex var global int func setGlobal(v int) { mu.Lock() global = v mu.Unlock() } func getGlobal() int { mu.Lock() defer mu.Unlock() return global } -
90% 成功率 Use atomic.Value for global state
var global atomic.Value global.Store(42) val := global.Load().(int)
无效尝试
常见但无效的做法:
-
Using global variable with local copy
90% 失败
Local copy doesn't protect global; race still on global.
-
Using atomic.Load/Store on non-atomic variable
70% 失败
Variable must be of atomic type; int64 works, but struct doesn't.