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fix concurrent access crash for handler creator (#772) 

Co-authored-by: Shelikhoo <xiaokangwang@outlook.com>
This commit is contained in:
yuhan6665 2021-10-20 07:30:34 -04:00 committed by GitHub
parent a58e20c811
commit 76a3f24169
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1 changed files with 10 additions and 0 deletions
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10
app/log/log_creator.go
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@ -1,6 +1,8 @@
package log package log
import ( import (
"sync"
"github.com/xtls/xray-core/common" "github.com/xtls/xray-core/common"
"github.com/xtls/xray-core/common/log" "github.com/xtls/xray-core/common/log"
) )
@ -13,16 +15,24 @@ type HandlerCreator func(LogType, HandlerCreatorOptions) (log.Handler, error)
var handlerCreatorMap = make(map[LogType]HandlerCreator) var handlerCreatorMap = make(map[LogType]HandlerCreator)
var handlerCreatorMapLock = &sync.RWMutex{}
func RegisterHandlerCreator(logType LogType, f HandlerCreator) error { func RegisterHandlerCreator(logType LogType, f HandlerCreator) error {
if f == nil { if f == nil {
return newError("nil HandlerCreator") return newError("nil HandlerCreator")
} }
handlerCreatorMapLock.Lock()
defer handlerCreatorMapLock.Unlock()
handlerCreatorMap[logType] = f handlerCreatorMap[logType] = f
return nil return nil
} }
func createHandler(logType LogType, options HandlerCreatorOptions) (log.Handler, error) { func createHandler(logType LogType, options HandlerCreatorOptions) (log.Handler, error) {
handlerCreatorMapLock.RLock()
defer handlerCreatorMapLock.RUnlock()
creator, found := handlerCreatorMap[logType] creator, found := handlerCreatorMap[logType]
if !found { if !found {
return nil, newError("unable to create log handler for ", logType) return nil, newError("unable to create log handler for ", logType)