tidb signal_posix 源码
tidb signal_posix 代码
文件路径：/util/signal/signal_posix.go
// Copyright 2018 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//go:build linux || darwin || freebsd || unix
package signal
import (
"log"
"os"
"os/signal"
"runtime"
"syscall"
"github.com/pingcap/tidb/util/logutil"
"go.uber.org/zap"
)
// SetupSignalHandler setup signal handler for TiDB Server
func SetupSignalHandler(shutdownFunc func(bool)) {
usrDefSignalChan := make(chan os.Signal, 1)
signal.Notify(usrDefSignalChan, syscall.SIGUSR1)
go func() {
buf := make([]byte, 1<<16)
for {
sig := <-usrDefSignalChan
if sig == syscall.SIGUSR1 {
stackLen := runtime.Stack(buf, true)
log.Printf("\n=== Got signal [%s] to dump goroutine stack. ===\n%s\n=== Finished dumping goroutine stack. ===\n", sig, buf[:stackLen])
}
}
}()
closeSignalChan := make(chan os.Signal, 1)
signal.Notify(closeSignalChan,
syscall.SIGHUP,
syscall.SIGINT,
syscall.SIGTERM,
syscall.SIGQUIT)
go func() {
sig := <-closeSignalChan
logutil.BgLogger().Info("got signal to exit", zap.Stringer("signal", sig))
shutdownFunc(sig != syscall.SIGHUP)
}()
}
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