Created
June 5, 2017 04:13
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race condition checker for go-mysql-driver
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package main | |
import ( | |
"context" | |
"database/sql" | |
"flag" | |
"fmt" | |
"log" | |
"os" | |
"runtime" | |
"sync" | |
"sync/atomic" | |
"time" | |
"github.com/kayac/parallel-benchmark/benchmark" | |
"github.com/shogo82148/mysql" | |
) | |
var mu sync.Mutex | |
var errCount map[string]int | |
type logger struct { | |
} | |
func (logger) Print(v ...interface{}) { | |
s := fmt.Sprint(v...) | |
mu.Lock() | |
if errCount == nil { | |
errCount = map[string]int{} | |
} | |
errCount[s] = errCount[s] + 1 | |
mu.Unlock() | |
} | |
var value atomic.Value | |
func main() { | |
var p int | |
flag.IntVar(&p, "p", 1, "parallelism") | |
var d time.Duration | |
flag.DurationVar(&d, "d", 10*time.Second, "duration") | |
flag.Parse() | |
mysql.SetLogger(logger{}) | |
user := os.Getenv("MYSQL_TEST_USER") | |
pass := os.Getenv("MYSQL_TEST_PASS") | |
addr := os.Getenv("MYSQL_TEST_ADDR") | |
dsn := fmt.Sprintf("%s:%s@tcp(%s)/%s?timeout=30s&strict=true", user, pass, addr, "gotest") | |
db, err := sql.Open("mysql", dsn) | |
if err != nil { | |
panic(err) | |
} | |
db.SetMaxIdleConns(p * runtime.GOMAXPROCS(0)) | |
go canceler() | |
time.Sleep(100 * time.Millisecond) | |
benchmark.RunFunc( | |
func() int { | |
score := 1 | |
ctx := value.Load().(context.Context) | |
if err := db.PingContext(ctx); err != nil { | |
logger{}.Print("conn.PingContext: ", err) | |
score = 0 | |
} | |
if _, err := db.ExecContext(ctx, "DO ?", 1); err != nil { | |
logger{}.Print("conn.ExecContext: ", err) | |
score = 0 | |
} | |
var v int | |
row := db.QueryRowContext(ctx, "SELECT ?", 1) | |
if err := row.Scan(&v); err != nil { | |
logger{}.Print("conn.Scan: ", err) | |
score = 0 | |
} | |
stmt, err := db.PrepareContext(ctx, "DO ?") | |
if err != nil { | |
logger{}.Print("conn.PrepareContext: ", err) | |
score = 0 | |
} else { | |
defer stmt.Close() | |
if _, err := stmt.ExecContext(ctx, 1); err != nil { | |
logger{}.Print("stmt.ExecContext: ", err) | |
score = 0 | |
} | |
} | |
stmt, err = db.PrepareContext(ctx, "SELECT ?") | |
if err != nil { | |
logger{}.Print("conn.PrepareContext: ", err) | |
score = 0 | |
} else { | |
defer stmt.Close() | |
row := stmt.QueryRowContext(ctx, 1) | |
if err := row.Scan(&v); err != nil { | |
logger{}.Print("stmt.Scan: ", err) | |
score = 0 | |
} | |
} | |
tx, err := db.BeginTx(ctx, nil) | |
if err != nil { | |
logger{}.Print("conn.BeginContext: ", err) | |
score = 0 | |
} else { | |
if _, err := tx.ExecContext(ctx, "DO ?", 1); err != nil { | |
logger{}.Print("tx.ExecContext: ", err) | |
score = 0 | |
} | |
if err := tx.Commit(); err != nil { | |
logger{}.Print("tx.Commit: ", err) | |
score = 0 | |
} | |
} | |
return score | |
}, | |
d, | |
p, | |
) | |
for err, count := range errCount { | |
log.Println(err, count) | |
} | |
} | |
func canceler() { | |
for { | |
ctx, cancel := context.WithCancel(context.Background()) | |
value.Store(ctx) | |
time.Sleep(100 * time.Millisecond) | |
cancel() | |
} | |
} |
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