example_test.go

Documentation: runtime/trace

     1  // Copyright 2017 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 trace_test
     6  
     7  import (
     8  	"fmt"
     9  	"log"
    10  	"os"
    11  	"runtime/trace"
    12  )
    13  
    14  // Example demonstrates the use of the trace package to trace
    15  // the execution of a Go program. The trace output will be
    16  // written to the file trace.out
    17  func Example() {
    18  	f, err := os.Create("trace.out")
    19  	if err != nil {
    20  		log.Fatalf("failed to create trace output file: %v", err)
    21  	}
    22  	defer func() {
    23  		if err := f.Close(); err != nil {
    24  			log.Fatalf("failed to close trace file: %v", err)
    25  		}
    26  	}()
    27  
    28  	if err := trace.Start(f); err != nil {
    29  		log.Fatalf("failed to start trace: %v", err)
    30  	}
    31  	defer trace.Stop()
    32  
    33  	// your program here
    34  	RunMyProgram()
    35  }
    36  
    37  func RunMyProgram() {
    38  	fmt.Printf("this function will be traced")
    39  }
    40
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