1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: 2023 The Ebitengine Authors
3
4//go:build darwin || freebsd || linux
5
6package purego_test
7
8import (
9 "errors"
10 "fmt"
11 "os"
12 "os/exec"
13 "path/filepath"
14 "runtime"
15 "strings"
16 "testing"
17
18 "github.com/ebitengine/purego"
19)
20
21func TestSimpleDlsym(t *testing.T) {
22 if _, err := purego.Dlsym(purego.RTLD_DEFAULT, "dlsym"); err != nil {
23 t.Errorf("Dlsym with RTLD_DEFAULT failed: %v", err)
24 }
25}
26
27func TestNestedDlopenCall(t *testing.T) {
28 libFileName := filepath.Join(t.TempDir(), "libdlnested.so")
29 t.Logf("Build %v", libFileName)
30
31 if err := buildSharedLib("CXX", libFileName, filepath.Join("testdata", "libdlnested", "nested_test.cpp")); err != nil {
32 t.Fatal(err)
33 }
34 defer os.Remove(libFileName)
35
36 lib, err := purego.Dlopen(libFileName, purego.RTLD_NOW|purego.RTLD_GLOBAL)
37 if err != nil {
38 t.Fatalf("Dlopen(%q) failed: %v", libFileName, err)
39 }
40
41 purego.Dlclose(lib)
42}
43
44func buildSharedLib(compilerEnv, libFile string, sources ...string) error {
45 out, err := exec.Command("go", "env", compilerEnv).Output()
46 if err != nil {
47 return fmt.Errorf("go env %s error: %w", compilerEnv, err)
48 }
49
50 compiler := strings.TrimSpace(string(out))
51 if compiler == "" {
52 return errors.New("compiler not found")
53 }
54
55 var args []string
56 if runtime.GOOS == "freebsd" {
57 args = []string{"-shared", "-Wall", "-Werror", "-fPIC", "-o", libFile}
58 } else {
59 args = []string{"-shared", "-Wall", "-Werror", "-o", libFile}
60 }
61
62 // macOS arm64 can run amd64 tests through Rossetta.
63 // Build the shared library based on the GOARCH and not
64 // the default behavior of the compiler.
65 if runtime.GOOS == "darwin" {
66 var arch string
67 switch runtime.GOARCH {
68 case "arm64":
69 arch = "arm64"
70 case "amd64":
71 arch = "x86_64"
72 default:
73 return fmt.Errorf("unknown macOS architecture %s", runtime.GOARCH)
74 }
75 args = append(args, "-arch", arch)
76 }
77 cmd := exec.Command(compiler, append(args, sources...)...)
78 if out, err := cmd.CombinedOutput(); err != nil {
79 return fmt.Errorf("compile lib: %w\n%q\n%s", err, cmd, string(out))
80 }
81
82 return nil
83}