{"id":44805,"date":"2022-12-18T22:30:00","date_gmt":"2024-02-26T12:17:19","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/44805-2\/"},"modified":"2024-04-29T05:54:51","modified_gmt":"2024-04-28T21:54:51","slug":"44805-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/44805-2\/","title":{"rendered":""},"content":{"rendered":"

golan race\u306b\u3064\u3044\u3066\u8a66\u3057\u3066\u307f\u305f<\/h1>\n

-race\u3092\u3064\u3051\u308b\u3053\u3068\u3067\u3001\u7af6\u5408\u30c1\u30a7\u30c3\u30af\u304c\u3067\u304d\u308b<\/h4>\n
package<\/span> main<\/span>\r\n\r\nimport<\/span> \"fmt\"<\/span>\r\n\r\nfunc<\/span> main<\/span>()<\/span> {<\/span>\r\n    c<\/span> :=<\/span> make<\/span>(<\/span>chan<\/span> bool<\/span>)<\/span>\r\n    m<\/span> :=<\/span> make<\/span>(<\/span>map<\/span>[<\/span>string<\/span>]<\/span>string<\/span>)<\/span>\r\n    go<\/span> func<\/span>()<\/span> {<\/span>\r\n        m<\/span>[<\/span>\"1\"<\/span>]<\/span> =<\/span> \"a\"<\/span> \/\/ First conflicting access.<\/span>\r\n        c<\/span> <-<\/span> true<\/span>\r\n    }()<\/span>\r\n    m<\/span>[<\/span>\"2\"<\/span>]<\/span> =<\/span> \"b\"<\/span> \/\/ Second conflicting access.<\/span>\r\n    <-<\/span>c<\/span>\r\n    for<\/span> k<\/span>,<\/span> v<\/span> :=<\/span> range<\/span> m<\/span> {<\/span>\r\n        fmt<\/span>.<\/span>Println<\/span>(<\/span>k<\/span>,<\/span> v<\/span>)<\/span>\r\n    }<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u7d50\u679c<\/p>\n
$ go run -race race.go \r\n==================\r\nWARNING: DATA RACE\r\nWrite at 0x00c00011c180 by goroutine 7:\r\n  runtime.mapassign_faststr()\r\n      \/usr\/local\/Cellar\/go\/1.14.2_1\/libexec\/src\/runtime\/map_faststr.go:202 +0x0\r\n  main.main.func1()\r\n      \/Users\/nagasaki\/development\/go\/src\/race\/race.go:9 +0x5d\r\n\r\nPrevious write at 0x00c00011c180 by main goroutine:\r\n  runtime.mapassign_faststr()\r\n      \/usr\/local\/Cellar\/go\/1.14.2_1\/libexec\/src\/runtime\/map_faststr.go:202 +0x0\r\n  main.main()\r\n      \/Users\/nagasaki\/development\/go\/src\/race\/race.go:12 +0xc6\r\n\r\nGoroutine 7 (running) created at:\r\n  main.main()\r\n      \/Users\/nagasaki\/development\/go\/src\/race\/race.go:8 +0x97\r\n==================\r\n2 b\r\n1 a\r\nFound 1 data race(s)\r\nexit status 66\r\n<\/code><\/pre>\n
\u53c2\u8003<\/h4>\n
golang Data Race detector<\/p>\n
\u65e5\u672c\u8a9e\u8a33(2020\/5\/2\uff14\u6642\u70b9\u3067\u306f\u3001\u306a\u3093\u3068\u304b\u30b3\u30d4\u30da\u7ffb\u8a33\u3057\u3066\u3001\u81ea\u5206\u89e3\u8aac\u3082\u3057\u3066\u307f\u305f\u3002\u5c11\u3057\u305a\u3064\u66f4\u65b0\u3001\u52a0\u7b46\u3057\u3066\u307f\u305f\u3044\uff09\u898b\u51fa\u3057\u306f\u3001### \u3092\u9752\u30d0\u30c3\u30af\u306b\u3001###\u306b\u3057\u305f\u3051\u3069\u3001\u539f\u6587\u3067\u306fh2\u306a\u306e\u3067\u3001## \u306b\u76f4\u305d\u3046\u304b\u306a\u3002<\/h4>\n
\u30a4\u30f3\u30c8\u30ed<\/h3>\n
\u30c7\u30fc\u30bf\u30ec\u30fc\u30b9\u306f\u3001\u4e26\u884c\u30b7\u30b9\u30c6\u30e0\u306e\u30d0\u30b0\u306e\u4e2d\u3067\u6700\u3082\u4e00\u822c\u7684\u3067\u30c7\u30d0\u30c3\u30b0\u306e\u96e3\u3057\u3044\u30bf\u30a4\u30d7\u306e\u4e00\u3064\u3067\u3059\u3002\u30c7\u30fc\u30bf\u7af6\u5408\u306f\u30012\u3064\u306e\u30b4\u30eb\u30fc\u30c1\u30f3\u304c\u540c\u6642\u306b\u540c\u3058\u5909\u6570\u306b\u30a2\u30af\u30bb\u30b9\u3057\u3001\u30a2\u30af\u30bb\u30b9\u306e\u3046\u3061\u5c11\u306a\u304f\u3068\u30821\u3064\u304c\u66f8\u304d\u8fbc\u307f\u3067\u3042\u308b\u5834\u5408\u306b\u767a\u751f\u3057\u307e\u3059\u3002\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u3001\u300cGo Memory Model\u300d\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u3053\u3053\u3067\u306f\u3001\u30af\u30e9\u30c3\u30b7\u30e5\u3084\u30e1\u30e2\u30ea\u7834\u640d\u306b\u3064\u306a\u304c\u308b\u30c7\u30fc\u30bf\u7af6\u5408\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n
func main() {\r\n    c := make(chan bool)\r\n    m := make(map[string]string)\r\n    go func() {\r\n        m[\"1\"] = \"a\" \/\/ First conflicting access.\r\n        c <- true\r\n    }()\r\n    m[\"2\"] = \"b\" \/\/ Second conflicting access.\r\n    <-c\r\n    for k, v := range m {\r\n        fmt.Println(k, v)\r\n    }\r\n}\r\n<\/code><\/pre>\n
\u4f7f\u7528\u65b9\u6cd5<\/h3>\n
\u3053\u306e\u3088\u3046\u306a\u30d0\u30b0\u3092\u8a3a\u65ad\u3059\u308b\u306e\u306b\u5f79\u7acb\u3064\u3088\u3046\u306b\u3001Go\u306b\u306f\u30c7\u30fc\u30bf\u7af6\u5408\u691c\u51fa\u5668\u304c\u7d44\u307f\u8fbc\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3092\u4f7f\u7528\u3059\u308b\u306b\u306f\u3001go \u30b3\u30de\u30f3\u30c9\u306b -race \u30d5\u30e9\u30b0\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n
\u30ec\u30dd\u30fc\u30c8\u30d5\u30a9\u30fc\u30de\u30c3\u30c8<\/h3>\n
\u7af6\u5408\u691c\u51fa\u5668\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u5185\u3067\u30c7\u30fc\u30bf\u7af6\u5408\u3092\u898b\u3064\u3051\u308b\u3068\u3001\u30ec\u30dd\u30fc\u30c8\u3092\u8868\u793a\u3057\u307e\u3059\u3002\u30ec\u30dd\u30fc\u30c8\u306b\u306f\u3001\u7af6\u5408\u3059\u308b\u30a2\u30af\u30bb\u30b9\u306e\u30b9\u30bf\u30c3\u30af\u30c8\u30ec\u30fc\u30b9\u3068\u3001\u95a2\u4fc2\u3059\u308b\u30b4\u30ed\u30fc\u30c1\u30f3\u304c\u4f5c\u6210\u3055\u308c\u305f\u30b9\u30bf\u30c3\u30af\u304c\u542b\u307e\u308c\u3066\u3044\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n
WARNING: DATA RACE\r\nRead by goroutine 185:\r\n  net.(*pollServer).AddFD()\r\n      src\/net\/fd_unix.go:89 +0x398\r\n  net.(*pollServer).WaitWrite()\r\n      src\/net\/fd_unix.go:247 +0x45\r\n  net.(*netFD).Write()\r\n      src\/net\/fd_unix.go:540 +0x4d4\r\n  net.(*conn).Write()\r\n      src\/net\/net.go:129 +0x101\r\n  net.func\u00b7060()\r\n      src\/net\/timeout_test.go:603 +0xaf\r\n\r\nPrevious write by goroutine 184:\r\n  net.setWriteDeadline()\r\n      src\/net\/sockopt_posix.go:135 +0xdf\r\n  net.setDeadline()\r\n      src\/net\/sockopt_posix.go:144 +0x9c\r\n  net.(*conn).SetDeadline()\r\n      src\/net\/net.go:161 +0xe3\r\n  net.func\u00b7061()\r\n      src\/net\/timeout_test.go:616 +0x3ed\r\n\r\nGoroutine 185 (running) created at:\r\n  net.func\u00b7061()\r\n      src\/net\/timeout_test.go:609 +0x288\r\n\r\nGoroutine 184 (running) created at:\r\n  net.TestProlongTimeout()\r\n      src\/net\/timeout_test.go:618 +0x298\r\n  testing.tRunner()\r\n      src\/testing\/testing.go:301 +0xe8\r\n<\/code><\/pre>\n
\u30aa\u30d7\u30b7\u30e7\u30f3<\/h3>\n
GORACE\u74b0\u5883\u5909\u6570\u306f\u3001\u30ec\u30fc\u30b9\u691c\u51fa\u5668\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u3092\u8a2d\u5b9a\u3057\u307e\u3059\u3002\u30d5\u30a9\u30fc\u30de\u30c3\u30c8\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n
GORACE=\"option1=val1 option2=val2\"\r\n<\/code><\/pre>\n
\u30aa\u30d7\u30b7\u30e7\u30f3\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n
log_path\uff08\u30c7\u30d5\u30a9\u30eb\u30c8\u306f\u6a19\u6e96\u30a8\u30e9\u30fc\uff09:\u30ec\u30fc\u30b9\u691c\u51fa\u5668\u306f\u3001\u30ec\u30dd\u30fc\u30c8\u3092 log_path.pid \u3068\u3044\u3046\u540d\u524d\u306e\u30d5\u30a1\u30a4\u30eb\u306b\u66f8\u304d\u51fa\u3057\u307e\u3059\u3002\u7279\u5225\u306a\u540d\u524d stdout \u3068 stderr \u306f\u3001\u305d\u308c\u305e\u308c\u6a19\u6e96\u51fa\u529b\u3068\u6a19\u6e96\u30a8\u30e9\u30fc\u306b\u30ec\u30dd\u30fc\u30c8\u3092\u66f8\u304d\u51fa\u3057\u307e\u3059\u3002
\nexitcode\uff08\u30c7\u30d5\u30a9\u30eb\u30c866\uff09\u3002\u7af6\u5408\u304c\u691c\u51fa\u3055\u308c\u305f\u5f8c\u306b\u7d42\u4e86\u3059\u308b\u3068\u304d\u306b\u4f7f\u7528\u3059\u308b\u7d42\u4e86\u30b9\u30c6\u30fc\u30bf\u30b9\u3002
\nstrip_path_prefix (\u30c7\u30d5\u30a9\u30eb\u30c8 “”): \u5831\u544a\u3055\u308c\u305f\u3059\u3079\u3066\u306e\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u3053\u306e\u63a5\u982d\u8f9e\u3092\u524a\u9664\u3057\u307e\u3059\u3002\u30ec\u30dd\u30fc\u30c8\u3092\u3088\u308a\u7c21\u6f54\u306b\u3059\u308b\u305f\u3081\u306b\u3001\u5831\u544a\u3055\u308c\u305f\u3059\u3079\u3066\u306e\u30d5\u30a1\u30a4\u30eb\u30d1\u30b9\u304b\u3089\u3053\u306e\u63a5\u982d\u8f9e\u3092\u53d6\u308a\u9664\u304d\u307e\u3059\u3002
\nhistory_size (\u30c7\u30d5\u30a9\u30eb\u30c8\u306f1):goroutine\u3054\u3068\u306e\u30e1\u30e2\u30ea\u30a2\u30af\u30bb\u30b9\u5c65\u6b74\u306f32K * 2**history_size\u8981\u7d20\u3067\u3059\u3002\u3053\u306e\u5024\u3092\u5927\u304d\u304f\u3059\u308b\u3068\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u306e\u5897\u52a0\u3092\u72a0\u7272\u306b\u3057\u3066\u3001\u30ec\u30dd\u30fc\u30c8\u3067\u306e “\u30b9\u30bf\u30c3\u30af\u306e\u5fa9\u5143\u306b\u5931\u6557\u3057\u307e\u3057\u305f” \u30a8\u30e9\u30fc\u3092\u56de\u907f\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
\nhalt_on_error (\u30c7\u30d5\u30a9\u30eb\u30c8\u306f0):\u6700\u521d\u306e\u30c7\u30fc\u30bf\u7af6\u5408\u3092\u5831\u544a\u3057\u305f\u5f8c\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u7d42\u4e86\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u5236\u5fa1\u3057\u307e\u3059\u3002
\natexit_sleep_ms (default 1000): \u6700\u521d\u306e\u30c7\u30fc\u30bf\u30ec\u30fc\u30b9\u3092\u5831\u544a\u3057\u305f\u5f8c\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u7d42\u4e86\u3059\u308b\u304b\u3069\u3046\u304b\u3092\u5236\u5fa1\u3059\u308b\u3002\u7d42\u4e86\u3059\u308b\u524d\u306b\u30e1\u30a4\u30f3\u30b4\u30ed\u30fc\u30c1\u30f3\u3067\u30b9\u30ea\u30fc\u30d7\u3059\u308b\u30df\u30ea\u79d2\u6570\u3002<\/p>\n
\u4f8b<\/p>\n
$ GORACE=\"log_path=\/tmp\/race\/report strip_path_prefix=\/my\/go\/sources\/\" go test -race\r\n<\/code><\/pre>\n
Excluding Tests \u30c6\u30b9\u30c8\u3092\u9664\u304f \uff08\u306a\u3093\u3060\u308d\u3053\u308c\uff1f\u610f\u5473\u308f\u304b\u3089\u306a\u3044\u306a\uff09<\/h3>\n
\/\/ +build !race\r\n\r\npackage foo\r\n\r\n\/\/ The test contains a data race. See issue 123.\r\nfunc TestFoo(t *testing.T) {\r\n    \/\/ ...\r\n}\r\n\r\n\/\/ The test fails under the race detector due to timeouts.\r\nfunc TestBar(t *testing.T) {\r\n    \/\/ ...\r\n}\r\n\r\n\/\/ The test takes too long under the race detector.\r\nfunc TestBaz(t *testing.T) {\r\n    \/\/ ...\r\n}\r\n<\/code><\/pre>\n
\u4f7f\u3044\u65b9<\/h3>\n
\u958b\u59cb\u3059\u308b\u306b\u306f\u3001\u30ec\u30fc\u30b9\u691c\u51fa\u5668\u3092\u4f7f\u7528\u3057\u3066\u30c6\u30b9\u30c8\u3092\u5b9f\u884c\u3057\u307e\u3059 (go test -race)\u3002\u7af6\u5408\u691c\u51fa\u5668\u306f\u5b9f\u884c\u6642\u306b\u767a\u751f\u3059\u308b\u7af6\u5408\u306e\u307f\u3092\u691c\u51fa\u3059\u308b\u306e\u3067\u3001\u5b9f\u884c\u3055\u308c\u306a\u3044\u30b3\u30fc\u30c9\u30d1\u30b9\u306e\u7af6\u5408\u306f\u691c\u51fa\u3067\u304d\u307e\u305b\u3093\u3002\u30c6\u30b9\u30c8\u306e\u30ab\u30d0\u30ec\u30c3\u30b8\u304c\u4e0d\u5b8c\u5168\u306a\u5834\u5408\u306f\u3001\u73fe\u5b9f\u7684\u306a\u4f5c\u696d\u8ca0\u8377\u306e\u4e0b\u3067 -race \u3092\u4f7f\u3063\u3066\u30d3\u30eb\u30c9\u3055\u308c\u305f\u30d0\u30a4\u30ca\u30ea\u3092\u5b9f\u884c\u3059\u308b\u3053\u3068\u3067\u3001\u3088\u308a\u591a\u304f\u306e\u30ec\u30fc\u30b9\u3092\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n
\u5178\u578b\u7684\u306a\u30c7\u30fc\u30bf\u30ec\u30fc\u30b9<\/h3>\n
\u3053\u3053\u3067\u306f\u3001\u4ee3\u8868\u7684\u306a\u30c7\u30fc\u30bf\u30ec\u30fc\u30b9\u3092\u3044\u304f\u3064\u304b\u7d39\u4ecb\u3057\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u3059\u3079\u3066\u30ec\u30fc\u30b9\u691c\u51fa\u5668\u3067\u691c\u51fa\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
\u30eb\u30fc\u30d7\u30ab\u30a6\u30f3\u30bf\u30fc\u3067\u306e\u30ec\u30fc\u30b9<\/p>\n
func main() {\r\n    var wg sync.WaitGroup\r\n    wg.Add(5)\r\n    for i := 0; i < 5; i++ {\r\n        go func() {\r\n            fmt.Println(i) \/\/ Not the 'i' you are looking for.\r\n            wg.Done()\r\n        }()\r\n    }\r\n    wg.Wait()\r\n}\r\n<\/code><\/pre>\n
(\u81ea\u5206\u89e3\u8aac\uff1a\u3053\u308c\u3060\u3068\u3001\uff15\u56de\u51e6\u7406\u304c\u7d42\u308f\u3063\u305f\u3068\u304d\u306b\u3001i\u3092\u51fa\u529b\u3057\u3088\u3046\u3068\u3059\u308b\u3068\u3001i\u304c5\u306b\u306a\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u5168\u90e85\u304c\u51fa\u529b\u3055\u308c\u308b\u3002\u4e0b\u8a18\u3060\u3068\u3001j\u306f\uff11\u3064\uff11\u3064\u306egoroutine\u306e\u4e2d\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u30ed\u30fc\u30ab\u30eb\u5909\u6570\u306a\u306e\u3067\u3001\u7af6\u5408\u3059\u308b\u3053\u3068\u306a\u304f\u300112345\u3068\u8868\u793a\u3055\u308c\u308b\uff09
\n\u95a2\u6570\u30ea\u30c6\u30e9\u30eb\u5185\u306e\u5909\u6570 i \u306f\u30eb\u30fc\u30d7\u3067\u4f7f\u7528\u3055\u308c\u308b\u306e\u3068\u540c\u3058\u5909\u6570\u306a\u306e\u3067\u3001\u30eb\u30fc\u30d7\u306e\u30a4\u30f3\u30af\u30ea\u30e1\u30f3\u30c8\u306b\u5408\u308f\u305b\u3066 goroutine \u3067\u306e\u8aad\u307f\u8fbc\u307f\u304c\u7af6\u5408\u3057\u307e\u3059\uff08\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u901a\u5e38 01234 \u3067\u306f\u306a\u304f 55555 \u3092\u8868\u793a\u3057\u307e\u3059\uff09\u3002\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u3001\u5909\u6570\u306e\u30b3\u30d4\u30fc\u3092\u4f5c\u6210\u3059\u308b\u3053\u3068\u3067\u4fee\u6b63\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
func main() {\r\n    var wg sync.WaitGroup\r\n    wg.Add(5)\r\n    for i := 0; i < 5; i++ {\r\n        go func(j int) {\r\n            fmt.Println(j) \/\/ Good. Read local copy of the loop counter.\r\n            wg.Done()\r\n        }(i)\r\n    }\r\n    wg.Wait()\r\n}\r\n<\/code><\/pre>\n
\u8aa4\u3063\u3066\u5171\u6709\u3055\u308c\u305f\u5909\u6570<\/p>\n
\/\/ ParallelWrite writes data to file1 and file2, returns the errors.\r\nfunc ParallelWrite(data []byte) chan error {\r\n    res := make(chan error, 2)\r\n    f1, err := os.Create(\"file1\")\r\n    if err != nil {\r\n        res <- err\r\n    } else {\r\n        go func() {\r\n            \/\/ This err is shared with the main goroutine,\r\n            \/\/ so the write races with the write below.\r\n            _, err = f1.Write(data)\r\n            res <- err\r\n            f1.Close()\r\n        }()\r\n    }\r\n    f2, err := os.Create(\"file2\") \/\/ The second conflicting write to err.\r\n    if err != nil {\r\n        res <- err\r\n    } else {\r\n        go func() {\r\n            _, err = f2.Write(data)\r\n            res <- err\r\n            f2.Close()\r\n        }()\r\n    }\r\n    return res\r\n}\r\n<\/code><\/pre>\n
\u4fee\u6b63\u70b9\u306f\u3001goroutines\u306b\u65b0\u3057\u3044\u5909\u6570\u3092\u5c0e\u5165\u3059\u308b\u3053\u3068\u3067\u3059\uff08:=\u306e\u4f7f\u7528\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\uff09\u3002<\/p>\n
            ...\r\n            _, err := f1.Write(data)\r\n            ...\r\n            _, err := f2.Write(data)\r\n            ...\r\n<\/code><\/pre>\n
\u4fdd\u8b77\u3055\u308c\u3066\u3044\u306a\u3044\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570<\/p>\n
\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u304c\u8907\u6570\u306e goroutine \u304b\u3089\u547c\u3073\u51fa\u3055\u308c\u308b\u3068\u3001\u30b5\u30fc\u30d3\u30b9 \u30de\u30c3\u30d7\u4e0a\u3067\u7af6\u5408\u304c\u767a\u751f\u3057\u307e\u3059\u3002\u540c\u3058\u30de\u30c3\u30d7\u306e\u540c\u6642\u8aad\u307f\u66f8\u304d\u306f\u5b89\u5168\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n
var service map[string]net.Addr\r\n\r\nfunc RegisterService(name string, addr net.Addr) {\r\n    service[name] = addr\r\n}\r\n\r\nfunc LookupService(name string) net.Addr {\r\n    return service[name]\r\n}\r\n<\/code><\/pre>\n
\u30b3\u30fc\u30c9\u3092\u5b89\u5168\u306b\u3059\u308b\u306b\u306f\u3001\u30a2\u30af\u30bb\u30b9\u3092\u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\u3067\u4fdd\u8b77\u3057\u307e\u3059\u3002
\n\uff08\u81ea\u5206\u89e3\u8aac\uff1a\u3067\u305f\u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\uff01\u3088\u304f\u308f\u304b\u3063\u3066\u306a\u3044\uff09<\/p>\n
var (\r\n    service   map[string]net.Addr\r\n    serviceMu sync.Mutex\r\n)\r\n\r\nfunc RegisterService(name string, addr net.Addr) {\r\n    serviceMu.Lock()\r\n    defer serviceMu.Unlock()\r\n    service[name] = addr\r\n}\r\n\r\nfunc LookupService(name string) net.Addr {\r\n    serviceMu.Lock()\r\n    defer serviceMu.Unlock()\r\n    return service[name]\r\n}\r\n<\/code><\/pre>\n
\u539f\u59cb\u7684\u306a\u4fdd\u8b77\u3055\u308c\u3066\u3044\u306a\u3044\u5909\u6570<\/p>\n
\u3053\u306e\u4f8b\u306e\u3088\u3046\u306b\u3001\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u306e\u5909\u6570\uff08bool\u3001int\u3001int64 \u306a\u3069\uff09\u3067\u3082\u30c7\u30fc\u30bf\u7af6\u5408\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
type Watchdog struct{ last int64 }\r\n\r\nfunc (w *Watchdog) KeepAlive() {\r\n    w.last = time.Now().UnixNano() \/\/ First conflicting access.\r\n}\r\n\r\nfunc (w *Watchdog) Start() {\r\n    go func() {\r\n        for {\r\n            time.Sleep(time.Second)\r\n            \/\/ Second conflicting access.\r\n            if w.last < time.Now().Add(-10*time.Second).UnixNano() {\r\n                fmt.Println(\"No keepalives for 10 seconds. Dying.\")\r\n                os.Exit(1)\r\n            }\r\n        }\r\n    }()\r\n}\r\n<\/code><\/pre>\n
\u3053\u306e\u3088\u3046\u306a\u300c\u7121\u5bb3\u306a\u300d\u30c7\u30fc\u30bf\u7af6\u5408\u3067\u3042\u3063\u3066\u3082\u3001\u30e1\u30e2\u30ea\u30a2\u30af\u30bb\u30b9\u306e\u975e\u539f\u5b50\u6027\u3001\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u6700\u9069\u5316\u3078\u306e\u5e72\u6e09\u3001\u30d7\u30ed\u30bb\u30c3\u30b5\u30e1\u30e2\u30ea\u3078\u306e\u30a2\u30af\u30bb\u30b9\u306e\u9806\u5e8f\u5909\u66f4\u306e\u554f\u984c\u306a\u3069\u306b\u3088\u308a\u3001\u30c7\u30d0\u30c3\u30b0\u304c\u56f0\u96e3\u306a\u554f\u984c\u304c\u767a\u751f\u3059\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u3053\u306e\u7af6\u5408\u306b\u5bfe\u3059\u308b\u4e00\u822c\u7684\u306a\u5bfe\u51e6\u6cd5\u306f\u3001\u30c1\u30e3\u30cd\u30eb\u307e\u305f\u306f\u30df\u30e5\u30fc\u30c6\u30c3\u30af\u30b9\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u30ed\u30c3\u30af\u30d5\u30ea\u30fc\u306a\u52d5\u4f5c\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u3001sync\/atomic \u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n
type Watchdog struct{ last int64 }\r\n\r\nfunc (w *Watchdog) KeepAlive() {\r\n    atomic.StoreInt64(&w.last, time.Now().UnixNano())\r\n}\r\n\r\nfunc (w *Watchdog) Start() {\r\n    go func() {\r\n        for {\r\n            time.Sleep(time.Second)\r\n            if atomic.LoadInt64(&w.last) < time.Now().Add(-10*time.Second).UnixNano() {\r\n                fmt.Println(\"No keepalives for 10 seconds. Dying.\")\r\n                os.Exit(1)\r\n            }\r\n        }\r\n    }()\r\n}\r\n<\/code><\/pre>\n
Supported Systems<\/h3>\n
\u30ec\u30fc\u30b9\u30c7\u30a3\u30c6\u30af\u30bf\u306f\u3001linux\/amd64\u3001linux\/ppc64le\u3001linux\/arm64\u3001freebsd\/amd64\u3001netbsd\/amd64\u3001darwin\/amd64\u3001windows\/amd64\u3067\u52d5\u4f5c\u3057\u307e\u3059\u3002<\/p>\n
\u30e9\u30f3\u30bf\u30a4\u30e0\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9<\/h3>\n
\u7af6\u5408\u691c\u51fa\u306e\u30b3\u30b9\u30c8\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u304c\u3001\u4e00\u822c\u7684\u306a\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5834\u5408\u3001\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c5\uff5e10\u500d\u3001\u5b9f\u884c\u6642\u9593\u304c2\uff5e20\u500d\u306b\u306a\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u7af6\u5408\u691c\u51fa\u5668\u306f\u73fe\u5728\u3001\u30c7\u30a3\u30d5\u30a7\u30fc\u30eb\u304a\u3088\u3073\u30ea\u30ab\u30d0\u30ea\u6587\u3054\u3068\u306b8\u30d0\u30a4\u30c8\u306e\u4f59\u5206\u306a\u30d0\u30a4\u30c8\u3092\u5272\u308a\u5f53\u3066\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u4f59\u5206\u306a\u5272\u308a\u5f53\u3066\u306f\u3001goroutine\u304c\u7d42\u4e86\u3059\u308b\u307e\u3067\u56de\u5fa9\u3055\u308c\u307e\u305b\u3093\u3002\u3053\u308c\u306f\u3001\u9577\u671f\u7684\u306b\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u30b4\u30ed\u30fc\u30c1\u30f3\u304cdefer\u3068recover\u547c\u3073\u51fa\u3057\u3092\u5b9a\u671f\u7684\u306b\u767a\u884c\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u30e1\u30e2\u30ea\u4f7f\u7528\u91cf\u304c\u5236\u9650\u306a\u304f\u5897\u52a0\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u30e1\u30e2\u30ea\u5272\u308a\u5f53\u3066\u306f\u3001runtime.ReadMemStats\u3084runtime\/pprof\u306e\u51fa\u529b\u306b\u306f\u8868\u793a\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
golan race\u306b\u3064\u3044\u3066\u8a66\u3057\u3066\u307f\u305f -race\u3092\u3064\u3051\u308b\u3053\u3068\u3067\u3001\u7af6\u5408\u30c1\u30a7\u30c3\u30af\u304c\u3067\u304d\u308b package mai […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-44805","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n- Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/zh\/blog\/44805-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"golan race\u306b\u3064\u3044\u3066\u8a66\u3057\u3066\u307f\u305f -race\u3092\u3064\u3051\u308b\u3053\u3068\u3067\u3001\u7af6\u5408\u30c1\u30a7\u30c3\u30af\u304c\u3067\u304d\u308b package mai […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/44805-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2024-02-26T12:17:19+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-28T21:54:51+00:00\" \/>\n<meta name=\"author\" content=\"\u6587, \u7fd4\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6587, \u7fd4\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/44805-2\/\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/44805-2\/\",\"name\":\"- Blog - Silicon Cloud\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\"},\"datePublished\":\"2024-02-26T12:17:19+00:00\",\"dateModified\":\"2024-04-28T21:54:51+00:00\",\"author\":{\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#\/schema\/person\/64d5cc7727fffbff2f9a2a8da1de3e5c\"},\"inLanguage\":\"zh-Hans\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.silicloud.com\/zh\/blog\/44805-2\/\"]}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.silicloud.com\/zh\/blog\/#website\",\"url\":\"https:\/\/www.silicloud.com\/zh\/blog\/\",\"name\":\"Blog - 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