1 // Copyright 2011 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // Package debug contains facilities for programs to debug themselves while 6 // they are running. 7 package debug 8 9 import ( 10 "os" 11 "runtime" 12 ) 13 14 // PrintStack prints to standard error the stack trace returned by runtime.Stack. 15 func PrintStack() { 16 os.Stderr.Write(Stack()) 17 } 18 19 // Stack returns a formatted stack trace of the goroutine that calls it. 20 // It calls runtime.Stack with a large enough buffer to capture the entire trace. 21 func Stack() []byte { 22 buf := make([]byte, 1024) 23 for { 24 n := runtime.Stack(buf, false) 25 if n < len(buf) { 26 return buf[:n] 27 } 28 buf = make([]byte, 2*len(buf)) 29 } 30 } 31
