github.com/bgentry/go@v0.0.0-20150121062915-6cf5a733d54d/src/cmd/addr2line/addr2line_test.go (about)

     1  // Copyright 2014 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 main
     6  
     7  import (
     8  	"bufio"
     9  	"bytes"
    10  	"io/ioutil"
    11  	"os"
    12  	"os/exec"
    13  	"path/filepath"
    14  	"runtime"
    15  	"strings"
    16  	"testing"
    17  )
    18  
    19  func loadSyms(t *testing.T) map[string]string {
    20  	cmd := exec.Command("go", "tool", "nm", os.Args[0])
    21  	out, err := cmd.CombinedOutput()
    22  	if err != nil {
    23  		t.Fatalf("go tool nm %v: %v\n%s", os.Args[0], err, string(out))
    24  	}
    25  	syms := make(map[string]string)
    26  	scanner := bufio.NewScanner(bytes.NewReader(out))
    27  	for scanner.Scan() {
    28  		f := strings.Fields(scanner.Text())
    29  		if len(f) < 3 {
    30  			continue
    31  		}
    32  		syms[f[2]] = f[0]
    33  	}
    34  	if err := scanner.Err(); err != nil {
    35  		t.Fatalf("error reading symbols: %v", err)
    36  	}
    37  	return syms
    38  }
    39  
    40  func runAddr2Line(t *testing.T, exepath, addr string) (funcname, path, lineno string) {
    41  	cmd := exec.Command(exepath, os.Args[0])
    42  	cmd.Stdin = strings.NewReader(addr)
    43  	out, err := cmd.CombinedOutput()
    44  	if err != nil {
    45  		t.Fatalf("go tool addr2line %v: %v\n%s", os.Args[0], err, string(out))
    46  	}
    47  	f := strings.Split(string(out), "\n")
    48  	if len(f) < 3 && f[2] == "" {
    49  		t.Fatal("addr2line output must have 2 lines")
    50  	}
    51  	funcname = f[0]
    52  	pathAndLineNo := f[1]
    53  	f = strings.Split(pathAndLineNo, ":")
    54  	if runtime.GOOS == "windows" {
    55  		switch len(f) {
    56  		case 2:
    57  			return funcname, f[0], f[1]
    58  		case 3:
    59  			return funcname, f[0] + ":" + f[1], f[2]
    60  		default:
    61  			t.Fatalf("no line number found in %q", pathAndLineNo)
    62  		}
    63  	}
    64  	if len(f) != 2 {
    65  		t.Fatalf("no line number found in %q", pathAndLineNo)
    66  	}
    67  	return funcname, f[0], f[1]
    68  }
    69  
    70  const symName = "cmd/addr2line.TestAddr2Line"
    71  
    72  func testAddr2Line(t *testing.T, exepath, addr string) {
    73  	funcName, srcPath, srcLineNo := runAddr2Line(t, exepath, addr)
    74  	if symName != funcName {
    75  		t.Fatalf("expected function name %v; got %v", symName, funcName)
    76  	}
    77  	fi1, err := os.Stat("addr2line_test.go")
    78  	if err != nil {
    79  		t.Fatalf("Stat failed: %v", err)
    80  	}
    81  	fi2, err := os.Stat(srcPath)
    82  	if err != nil {
    83  		t.Fatalf("Stat failed: %v", err)
    84  	}
    85  	if !os.SameFile(fi1, fi2) {
    86  		t.Fatalf("addr2line_test.go and %s are not same file", srcPath)
    87  	}
    88  	if srcLineNo != "94" {
    89  		t.Fatalf("line number = %v; want 94", srcLineNo)
    90  	}
    91  }
    92  
    93  // This is line 93. The test depends on that.
    94  func TestAddr2Line(t *testing.T) {
    95  	switch runtime.GOOS {
    96  	case "nacl", "android":
    97  		t.Skipf("skipping on %s", runtime.GOOS)
    98  	}
    99  
   100  	syms := loadSyms(t)
   101  
   102  	tmpDir, err := ioutil.TempDir("", "TestAddr2Line")
   103  	if err != nil {
   104  		t.Fatal("TempDir failed: ", err)
   105  	}
   106  	defer os.RemoveAll(tmpDir)
   107  
   108  	exepath := filepath.Join(tmpDir, "testaddr2line.exe")
   109  	out, err := exec.Command("go", "build", "-o", exepath, "cmd/addr2line").CombinedOutput()
   110  	if err != nil {
   111  		t.Fatalf("go build -o %v cmd/addr2line: %v\n%s", exepath, err, string(out))
   112  	}
   113  
   114  	testAddr2Line(t, exepath, syms[symName])
   115  	testAddr2Line(t, exepath, "0x"+syms[symName])
   116  }