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Source file src/runtime/debug/stack.go

Documentation: runtime/debug

     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  

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