/
dumpstack.go
52 lines (44 loc) · 1.08 KB
/
dumpstack.go
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// Copyright (c) 2021 Terminus, 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.
package dumpstack
import (
"fmt"
"os"
"os/signal"
"runtime"
"syscall"
)
func Open() {
c := make(chan os.Signal, 1)
signal.Notify(c, syscall.SIGUSR1)
go func() {
for range c {
dumpStacks()
}
}()
}
func dumpStacks() {
var (
buf []byte
size int
)
bufLen := 16 * 1024 // 16K
for size == len(buf) {
buf = make([]byte, bufLen)
size = runtime.Stack(buf, true)
bufLen *= 2
}
buf = buf[:size]
fmt.Printf("=== BEGIN goroutine stack === \n%s\n=== END goroutine stack ===\n", buf)
}