+++ /dev/null
-// Copyright 2019 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 so_test
-
-import (
- "io"
- "os"
- "path/filepath"
- "strings"
-)
-
-// overlayDir makes a minimal-overhead copy of srcRoot in which new files may be added.
-//
-// TODO: Once we no longer need to support the misc module in GOPATH mode,
-// factor this function out into a package to reduce duplication.
-func overlayDir(dstRoot, srcRoot string) error {
- dstRoot = filepath.Clean(dstRoot)
- if err := os.MkdirAll(dstRoot, 0777); err != nil {
- return err
- }
-
- srcRoot, err := filepath.Abs(srcRoot)
- if err != nil {
- return err
- }
-
- return filepath.Walk(srcRoot, func(srcPath string, info os.FileInfo, err error) error {
- if err != nil || srcPath == srcRoot {
- return err
- }
-
- suffix := strings.TrimPrefix(srcPath, srcRoot)
- for len(suffix) > 0 && suffix[0] == filepath.Separator {
- suffix = suffix[1:]
- }
- dstPath := filepath.Join(dstRoot, suffix)
-
- perm := info.Mode() & os.ModePerm
- if info.Mode()&os.ModeSymlink != 0 {
- info, err = os.Stat(srcPath)
- if err != nil {
- return err
- }
- perm = info.Mode() & os.ModePerm
- }
-
- // Always copy directories (don't symlink them).
- // If we add a file in the overlay, we don't want to add it in the original.
- if info.IsDir() {
- return os.MkdirAll(dstPath, perm|0200)
- }
-
- // If the OS supports symlinks, use them instead of copying bytes.
- if err := os.Symlink(srcPath, dstPath); err == nil {
- return nil
- }
-
- // Otherwise, copy the bytes.
- src, err := os.Open(srcPath)
- if err != nil {
- return err
- }
- defer src.Close()
-
- dst, err := os.OpenFile(dstPath, os.O_WRONLY|os.O_CREATE|os.O_EXCL, perm)
- if err != nil {
- return err
- }
-
- _, err = io.Copy(dst, src)
- if closeErr := dst.Close(); err == nil {
- err = closeErr
- }
- return err
- })
-}
+++ /dev/null
-// Copyright 2019 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 so_test
-
-import (
- "internal/testenv"
- "log"
- "os"
- "os/exec"
- "path/filepath"
- "runtime"
- "strings"
- "testing"
-)
-
-func TestSO(t *testing.T) {
- if runtime.GOOS == "ios" {
- t.Skip("iOS disallows dynamic loading of user libraries")
- }
- testenv.MustHaveGoBuild(t)
- testenv.MustHaveExec(t)
- testenv.MustHaveCGO(t)
-
- GOPATH, err := os.MkdirTemp("", "cgosotest")
- if err != nil {
- log.Fatal(err)
- }
- defer os.RemoveAll(GOPATH)
-
- modRoot := filepath.Join(GOPATH, "src", "cgosotest")
- if err := overlayDir(modRoot, "testdata"); err != nil {
- log.Panic(err)
- }
- if err := os.WriteFile(filepath.Join(modRoot, "go.mod"), []byte("module cgosotest\n"), 0666); err != nil {
- log.Panic(err)
- }
-
- cmd := exec.Command("go", "env", "CC", "GOGCCFLAGS")
- cmd.Dir = modRoot
- cmd.Stderr = new(strings.Builder)
- cmd.Env = append(os.Environ(), "GOPATH="+GOPATH)
- out, err := cmd.Output()
- if err != nil {
- t.Fatalf("%s: %v\n%s", strings.Join(cmd.Args, " "), err, cmd.Stderr)
- }
- lines := strings.Split(string(out), "\n")
- if len(lines) != 3 || lines[2] != "" {
- t.Fatalf("Unexpected output from %s:\n%s", strings.Join(cmd.Args, " "), lines)
- }
-
- cc := lines[0]
- if cc == "" {
- t.Fatal("CC environment variable (go env CC) cannot be empty")
- }
- gogccflags := strings.Split(lines[1], " ")
-
- // build shared object
- ext := "so"
- args := append(gogccflags, "-shared")
- switch runtime.GOOS {
- case "darwin", "ios":
- ext = "dylib"
- args = append(args, "-undefined", "suppress", "-flat_namespace")
- case "windows":
- ext = "dll"
- args = append(args, "-DEXPORT_DLL")
- // At least in mingw-clang it is not permitted to just name a .dll
- // on the command line. You must name the corresponding import
- // library instead, even though the dll is used when the executable is run.
- args = append(args, "-Wl,-out-implib,libcgosotest.a")
- case "aix":
- ext = "so.1"
- }
- sofname := "libcgosotest." + ext
- args = append(args, "-o", sofname, "cgoso_c.c")
-
- cmd = exec.Command(cc, args...)
- cmd.Dir = modRoot
- cmd.Env = append(os.Environ(), "GOPATH="+GOPATH)
- out, err = cmd.CombinedOutput()
- if err != nil {
- t.Fatalf("%s: %s\n%s", strings.Join(cmd.Args, " "), err, out)
- }
- t.Logf("%s:\n%s", strings.Join(cmd.Args, " "), out)
-
- if runtime.GOOS == "aix" {
- // Shared object must be wrapped by an archive
- cmd = exec.Command("ar", "-X64", "-q", "libcgosotest.a", "libcgosotest.so.1")
- cmd.Dir = modRoot
- out, err = cmd.CombinedOutput()
- if err != nil {
- t.Fatalf("%s: %s\n%s", strings.Join(cmd.Args, " "), err, out)
- }
- }
-
- cmd = exec.Command("go", "build", "-o", "main.exe", "main.go")
- cmd.Dir = modRoot
- cmd.Env = append(os.Environ(), "GOPATH="+GOPATH)
- out, err = cmd.CombinedOutput()
- if err != nil {
- t.Fatalf("%s: %s\n%s", strings.Join(cmd.Args, " "), err, out)
- }
- t.Logf("%s:\n%s", strings.Join(cmd.Args, " "), out)
-
- cmd = exec.Command("./main.exe")
- cmd.Dir = modRoot
- cmd.Env = append(os.Environ(), "GOPATH="+GOPATH)
- if runtime.GOOS != "windows" {
- s := "LD_LIBRARY_PATH"
- if runtime.GOOS == "darwin" || runtime.GOOS == "ios" {
- s = "DYLD_LIBRARY_PATH"
- }
- cmd.Env = append(os.Environ(), s+"=.")
-
- // On FreeBSD 64-bit architectures, the 32-bit linker looks for
- // different environment variables.
- if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" {
- cmd.Env = append(cmd.Env, "LD_32_LIBRARY_PATH=.")
- }
- }
- out, err = cmd.CombinedOutput()
- if err != nil {
- t.Fatalf("%s: %s\n%s", strings.Join(cmd.Args, " "), err, out)
- }
- t.Logf("%s:\n%s", strings.Join(cmd.Args, " "), out)
-}