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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 (
"bufio"
"bytes"
"internal/testenv"
"os"
"path/filepath"
"runtime"
"strings"
"sync"
"testing"
)
// TestMain executes the test binary as the addr2line command if
// GO_ADDR2LINETEST_IS_ADDR2LINE is set, and runs the tests otherwise.
func TestMain(m *testing.M) {
if os.Getenv("GO_ADDR2LINETEST_IS_ADDR2LINE") != "" {
main()
os.Exit(0)
}
os.Setenv("GO_ADDR2LINETEST_IS_ADDR2LINE", "1") // Set for subprocesses to inherit.
os.Exit(m.Run())
}
// addr2linePath returns the path to the "addr2line" binary to run.
func addr2linePath(t testing.TB) string {
t.Helper()
testenv.MustHaveExec(t)
addr2linePathOnce.Do(func() {
addr2lineExePath, addr2linePathErr = os.Executable()
})
if addr2linePathErr != nil {
t.Fatal(addr2linePathErr)
}
return addr2lineExePath
}
var (
addr2linePathOnce sync.Once
addr2lineExePath string
addr2linePathErr error
)
func loadSyms(t *testing.T, dbgExePath string) map[string]string {
cmd := testenv.Command(t, testenv.GoToolPath(t), "tool", "nm", dbgExePath)
out, err := cmd.CombinedOutput()
if err != nil {
t.Fatalf("%v: %v\n%s", cmd, err, string(out))
}
syms := make(map[string]string)
scanner := bufio.NewScanner(bytes.NewReader(out))
for scanner.Scan() {
f := strings.Fields(scanner.Text())
if len(f) < 3 {
continue
}
syms[f[2]] = f[0]
}
if err := scanner.Err(); err != nil {
t.Fatalf("error reading symbols: %v", err)
}
return syms
}
func runAddr2Line(t *testing.T, dbgExePath, addr string) (funcname, path, lineno string) {
cmd := testenv.Command(t, addr2linePath(t), dbgExePath)
cmd.Stdin = strings.NewReader(addr)
out, err := cmd.CombinedOutput()
if err != nil {
t.Fatalf("go tool addr2line %v: %v\n%s", os.Args[0], err, string(out))
}
f := strings.Split(string(out), "\n")
if len(f) < 3 && f[2] == "" {
t.Fatal("addr2line output must have 2 lines")
}
funcname = f[0]
pathAndLineNo := f[1]
f = strings.Split(pathAndLineNo, ":")
if runtime.GOOS == "windows" && len(f) == 3 {
// Reattach drive letter.
f = []string{f[0] + ":" + f[1], f[2]}
}
if len(f) != 2 {
t.Fatalf("no line number found in %q", pathAndLineNo)
}
return funcname, f[0], f[1]
}
const symName = "cmd/addr2line.TestAddr2Line"
func testAddr2Line(t *testing.T, dbgExePath, addr string) {
funcName, srcPath, srcLineNo := runAddr2Line(t, dbgExePath, addr)
if symName != funcName {
t.Fatalf("expected function name %v; got %v", symName, funcName)
}
fi1, err := os.Stat("addr2line_test.go")
if err != nil {
t.Fatalf("Stat failed: %v", err)
}
// Debug paths are stored slash-separated, so convert to system-native.
srcPath = filepath.FromSlash(srcPath)
fi2, err := os.Stat(srcPath)
// If GOROOT_FINAL is set and srcPath is not the file we expect, perhaps
// srcPath has had GOROOT_FINAL substituted for GOROOT and GOROOT hasn't been
// moved to its final location yet. If so, try the original location instead.
if gorootFinal := os.Getenv("GOROOT_FINAL"); gorootFinal != "" &&
(os.IsNotExist(err) || (err == nil && !os.SameFile(fi1, fi2))) {
// srcPath is clean, but GOROOT_FINAL itself might not be.
// (See https://golang.org/issue/41447.)
gorootFinal = filepath.Clean(gorootFinal)
if strings.HasPrefix(srcPath, gorootFinal) {
fi2, err = os.Stat(runtime.GOROOT() + strings.TrimPrefix(srcPath, gorootFinal))
}
}
if err != nil {
t.Fatalf("Stat failed: %v", err)
}
if !os.SameFile(fi1, fi2) {
t.Fatalf("addr2line_test.go and %s are not same file", srcPath)
}
if srcLineNo != "138" {
t.Fatalf("line number = %v; want 138", srcLineNo)
}
}
// This is line 137. The test depends on that.
func TestAddr2Line(t *testing.T) {
testenv.MustHaveGoBuild(t)
tmpDir, err := os.MkdirTemp("", "TestAddr2Line")
if err != nil {
t.Fatal("TempDir failed: ", err)
}
defer os.RemoveAll(tmpDir)
// Build copy of test binary with debug symbols,
// since the one running now may not have them.
exepath := filepath.Join(tmpDir, "testaddr2line_test.exe")
out, err := testenv.Command(t, testenv.GoToolPath(t), "test", "-c", "-o", exepath, "cmd/addr2line").CombinedOutput()
if err != nil {
t.Fatalf("go test -c -o %v cmd/addr2line: %v\n%s", exepath, err, string(out))
}
syms := loadSyms(t, exepath)
testAddr2Line(t, exepath, syms[symName])
testAddr2Line(t, exepath, "0x"+syms[symName])
}