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// Copyright 2014 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 main
import (
"fmt"
"internal/testenv"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
"testing"
"text/template"
)
var testnmpath string // path to nm command created for testing purposes
// The TestMain function creates a nm command for testing purposes and
// deletes it after the tests have been run.
func TestMain(m *testing.M) {
os.Exit(testMain(m))
}
func testMain(m *testing.M) int {
if !testenv.HasGoBuild() {
return 0
}
tmpDir, err := ioutil.TempDir("", "TestNM")
if err != nil {
fmt.Println("TempDir failed:", err)
return 2
}
defer os.RemoveAll(tmpDir)
testnmpath = filepath.Join(tmpDir, "testnm.exe")
gotool, err := testenv.GoTool()
if err != nil {
fmt.Println("GoTool failed:", err)
return 2
}
out, err := exec.Command(gotool, "build", "-o", testnmpath, "cmd/nm").CombinedOutput()
if err != nil {
fmt.Printf("go build -o %v cmd/nm: %v\n%s", testnmpath, err, string(out))
return 2
}
return m.Run()
}
func TestNonGoExecs(t *testing.T) {
t.Parallel()
testfiles := []string{
"debug/elf/testdata/gcc-386-freebsd-exec",
"debug/elf/testdata/gcc-amd64-linux-exec",
"debug/macho/testdata/gcc-386-darwin-exec",
"debug/macho/testdata/gcc-amd64-darwin-exec",
// "debug/pe/testdata/gcc-amd64-mingw-exec", // no symbols!
"debug/pe/testdata/gcc-386-mingw-exec",
"debug/plan9obj/testdata/amd64-plan9-exec",
"debug/plan9obj/testdata/386-plan9-exec",
"internal/xcoff/testdata/gcc-ppc64-aix-dwarf2-exec",
}
for _, f := range testfiles {
exepath := filepath.Join(runtime.GOROOT(), "src", f)
cmd := exec.Command(testnmpath, exepath)
out, err := cmd.CombinedOutput()
if err != nil {
t.Errorf("go tool nm %v: %v\n%s", exepath, err, string(out))
}
}
}
func testGoExec(t *testing.T, iscgo, isexternallinker bool) {
t.Parallel()
tmpdir, err := ioutil.TempDir("", "TestGoExec")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
src := filepath.Join(tmpdir, "a.go")
file, err := os.Create(src)
if err != nil {
t.Fatal(err)
}
err = template.Must(template.New("main").Parse(testexec)).Execute(file, iscgo)
if e := file.Close(); err == nil {
err = e
}
if err != nil {
t.Fatal(err)
}
exe := filepath.Join(tmpdir, "a.exe")
args := []string{"build", "-o", exe}
if iscgo {
linkmode := "internal"
if isexternallinker {
linkmode = "external"
}
args = append(args, "-ldflags", "-linkmode="+linkmode)
}
args = append(args, src)
out, err := exec.Command(testenv.GoToolPath(t), args...).CombinedOutput()
if err != nil {
t.Fatalf("building test executable failed: %s %s", err, out)
}
out, err = exec.Command(exe).CombinedOutput()
if err != nil {
t.Fatalf("running test executable failed: %s %s", err, out)
}
names := make(map[string]string)
for _, line := range strings.Split(string(out), "\n") {
if line == "" {
continue
}
f := strings.Split(line, "=")
if len(f) != 2 {
t.Fatalf("unexpected output line: %q", line)
}
names["main."+f[0]] = f[1]
}
runtimeSyms := map[string]string{
"runtime.text": "T",
"runtime.etext": "T",
"runtime.rodata": "R",
"runtime.erodata": "R",
"runtime.epclntab": "R",
"runtime.noptrdata": "D",
}
out, err = exec.Command(testnmpath, exe).CombinedOutput()
if err != nil {
t.Fatalf("go tool nm: %v\n%s", err, string(out))
}
relocated := func(code string) bool {
if runtime.GOOS == "aix" {
// On AIX, .data and .bss addresses are changed by the loader.
// Therefore, the values returned by the exec aren't the same
// than the ones inside the symbol table.
switch code {
case "D", "d", "B", "b":
return true
}
}
if runtime.GOOS == "windows" && runtime.GOARCH == "arm" {
return true
}
return false
}
dups := make(map[string]bool)
for _, line := range strings.Split(string(out), "\n") {
f := strings.Fields(line)
if len(f) < 3 {
continue
}
name := f[2]
if addr, found := names[name]; found {
if want, have := addr, "0x"+f[0]; have != want {
if !relocated(f[1]) {
t.Errorf("want %s address for %s symbol, but have %s", want, name, have)
}
}
delete(names, name)
}
if _, found := dups[name]; found {
t.Errorf("duplicate name of %q is found", name)
}
if stype, found := runtimeSyms[name]; found {
if runtime.GOOS == "plan9" && stype == "R" {
// no read-only data segment symbol on Plan 9
stype = "D"
}
if want, have := stype, strings.ToUpper(f[1]); have != want {
t.Errorf("want %s type for %s symbol, but have %s", want, name, have)
}
delete(runtimeSyms, name)
}
}
if len(names) > 0 {
t.Errorf("executable is missing %v symbols", names)
}
if len(runtimeSyms) > 0 {
t.Errorf("executable is missing %v symbols", runtimeSyms)
}
}
func TestGoExec(t *testing.T) {
testGoExec(t, false, false)
}
func testGoLib(t *testing.T, iscgo bool) {
t.Parallel()
tmpdir, err := ioutil.TempDir("", "TestGoLib")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
gopath := filepath.Join(tmpdir, "gopath")
libpath := filepath.Join(gopath, "src", "mylib")
err = os.MkdirAll(libpath, 0777)
if err != nil {
t.Fatal(err)
}
src := filepath.Join(libpath, "a.go")
file, err := os.Create(src)
if err != nil {
t.Fatal(err)
}
err = template.Must(template.New("mylib").Parse(testlib)).Execute(file, iscgo)
if e := file.Close(); err == nil {
err = e
}
if err != nil {
t.Fatal(err)
}
args := []string{"install", "mylib"}
cmd := exec.Command(testenv.GoToolPath(t), args...)
cmd.Env = append(os.Environ(), "GOPATH="+gopath)
out, err := cmd.CombinedOutput()
if err != nil {
t.Fatalf("building test lib failed: %s %s", err, out)
}
pat := filepath.Join(gopath, "pkg", "*", "mylib.a")
ms, err := filepath.Glob(pat)
if err != nil {
t.Fatal(err)
}
if len(ms) == 0 {
t.Fatalf("cannot found paths for pattern %s", pat)
}
mylib := ms[0]
out, err = exec.Command(testnmpath, mylib).CombinedOutput()
if err != nil {
t.Fatalf("go tool nm: %v\n%s", err, string(out))
}
type symType struct {
Type string
Name string
CSym bool
Found bool
}
var syms = []symType{
{"B", "%22%22.Testdata", false, false},
{"T", "%22%22.Testfunc", false, false},
}
if iscgo {
syms = append(syms, symType{"B", "%22%22.TestCgodata", false, false})
syms = append(syms, symType{"T", "%22%22.TestCgofunc", false, false})
if runtime.GOOS == "darwin" || (runtime.GOOS == "windows" && runtime.GOARCH == "386") {
syms = append(syms, symType{"D", "_cgodata", true, false})
syms = append(syms, symType{"T", "_cgofunc", true, false})
} else {
syms = append(syms, symType{"D", "cgodata", true, false})
syms = append(syms, symType{"T", "cgofunc", true, false})
}
}
for _, line := range strings.Split(string(out), "\n") {
f := strings.Fields(line)
var typ, name string
var csym bool
if iscgo {
if len(f) < 4 {
continue
}
csym = !strings.Contains(f[0], "_go_.o")
typ = f[2]
name = f[3]
} else {
if len(f) < 3 {
continue
}
typ = f[1]
name = f[2]
}
for i := range syms {
sym := &syms[i]
if sym.Type == typ && sym.Name == name && sym.CSym == csym {
if sym.Found {
t.Fatalf("duplicate symbol %s %s", sym.Type, sym.Name)
}
sym.Found = true
}
}
}
for _, sym := range syms {
if !sym.Found {
t.Errorf("cannot found symbol %s %s", sym.Type, sym.Name)
}
}
}
func TestGoLib(t *testing.T) {
testGoLib(t, false)
}
const testexec = `
package main
import "fmt"
{{if .}}import "C"
{{end}}
func main() {
testfunc()
}
var testdata uint32
func testfunc() {
fmt.Printf("main=%p\n", main)
fmt.Printf("testfunc=%p\n", testfunc)
fmt.Printf("testdata=%p\n", &testdata)
}
`
const testlib = `
package mylib
{{if .}}
// int cgodata = 5;
// void cgofunc(void) {}
import "C"
var TestCgodata = C.cgodata
func TestCgofunc() {
C.cgofunc()
}
{{end}}
var Testdata uint32
func Testfunc() {}
`