golang stack 代码
文件路径：/src/runtime/debug/stack.go
/ Copyright 2011 The Go Authors. All rights reserved.
/ Use of this source code is governed by a BSD-style
/ license that can be found in the LICENSE file.
/ Package debug contains facilities for programs to debug themselves while
/ they are running.
package debug
import (
"os"
"runtime"
)
/ PrintStack prints to standard error the stack trace returned by runtime.Stack.
func PrintStack() {
os.Stderr.Write(Stack())
}
/ Stack returns a formatted stack trace of the goroutine that calls it.
/ It calls runtime.Stack with a large enough buffer to capture the entire trace.
func Stack() []byte {
buf := make([]byte, 1024)
for {
n := runtime.Stack(buf, false)
if n < len(buf) {
return buf[:n]
}
buf = make([]byte, 2*len(buf))
}
}