go stack dump

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 {
                // second arg true for all goroutines
                n := runtime.Stack(buf, false)
                if n < len(buf) {
                        return buf[:n]
                }
                buf = make([]byte, 2*len(buf))
        }
}