summaryrefslogtreecommitdiffstats
path: root/misc/cgo/testcshared/cshared_test.go
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--misc/cgo/testcshared/cshared_test.go856
1 files changed, 856 insertions, 0 deletions
diff --git a/misc/cgo/testcshared/cshared_test.go b/misc/cgo/testcshared/cshared_test.go
new file mode 100644
index 0000000..1cd8c2a
--- /dev/null
+++ b/misc/cgo/testcshared/cshared_test.go
@@ -0,0 +1,856 @@
+// Copyright 2017 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 cshared_test
+
+import (
+ "bytes"
+ "debug/elf"
+ "debug/pe"
+ "encoding/binary"
+ "flag"
+ "fmt"
+ "log"
+ "os"
+ "os/exec"
+ "path/filepath"
+ "runtime"
+ "strings"
+ "sync"
+ "testing"
+ "unicode"
+)
+
+// C compiler with args (from $(go env CC) $(go env GOGCCFLAGS)).
+var cc []string
+
+// ".exe" on Windows.
+var exeSuffix string
+
+var GOOS, GOARCH, GOROOT string
+var installdir, androiddir string
+var libSuffix, libgoname string
+
+func TestMain(m *testing.M) {
+ os.Exit(testMain(m))
+}
+
+func testMain(m *testing.M) int {
+ log.SetFlags(log.Lshortfile)
+ flag.Parse()
+ if testing.Short() && os.Getenv("GO_BUILDER_NAME") == "" {
+ fmt.Printf("SKIP - short mode and $GO_BUILDER_NAME not set\n")
+ os.Exit(0)
+ }
+
+ GOOS = goEnv("GOOS")
+ GOARCH = goEnv("GOARCH")
+ GOROOT = goEnv("GOROOT")
+
+ if _, err := os.Stat(GOROOT); os.IsNotExist(err) {
+ log.Fatalf("Unable able to find GOROOT at '%s'", GOROOT)
+ }
+
+ androiddir = fmt.Sprintf("/data/local/tmp/testcshared-%d", os.Getpid())
+ if runtime.GOOS != GOOS && GOOS == "android" {
+ args := append(adbCmd(), "exec-out", "mkdir", "-p", androiddir)
+ cmd := exec.Command(args[0], args[1:]...)
+ out, err := cmd.CombinedOutput()
+ if err != nil {
+ log.Fatalf("setupAndroid failed: %v\n%s\n", err, out)
+ }
+ defer cleanupAndroid()
+ }
+
+ cc = []string{goEnv("CC")}
+
+ out := goEnv("GOGCCFLAGS")
+ quote := '\000'
+ start := 0
+ lastSpace := true
+ backslash := false
+ s := string(out)
+ for i, c := range s {
+ if quote == '\000' && unicode.IsSpace(c) {
+ if !lastSpace {
+ cc = append(cc, s[start:i])
+ lastSpace = true
+ }
+ } else {
+ if lastSpace {
+ start = i
+ lastSpace = false
+ }
+ if quote == '\000' && !backslash && (c == '"' || c == '\'') {
+ quote = c
+ backslash = false
+ } else if !backslash && quote == c {
+ quote = '\000'
+ } else if (quote == '\000' || quote == '"') && !backslash && c == '\\' {
+ backslash = true
+ } else {
+ backslash = false
+ }
+ }
+ }
+ if !lastSpace {
+ cc = append(cc, s[start:])
+ }
+
+ switch GOOS {
+ case "darwin", "ios":
+ // For Darwin/ARM.
+ // TODO(crawshaw): can we do better?
+ cc = append(cc, []string{"-framework", "CoreFoundation", "-framework", "Foundation"}...)
+ case "android":
+ cc = append(cc, "-pie")
+ }
+ libgodir := GOOS + "_" + GOARCH
+ switch GOOS {
+ case "darwin", "ios":
+ if GOARCH == "arm64" {
+ libgodir += "_shared"
+ }
+ case "dragonfly", "freebsd", "linux", "netbsd", "openbsd", "solaris", "illumos":
+ libgodir += "_shared"
+ }
+ cc = append(cc, "-I", filepath.Join("pkg", libgodir))
+
+ // Force reallocation (and avoid aliasing bugs) for parallel tests that append to cc.
+ cc = cc[:len(cc):len(cc)]
+
+ if GOOS == "windows" {
+ exeSuffix = ".exe"
+ }
+
+ // Copy testdata into GOPATH/src/testcshared, along with a go.mod file
+ // declaring the same path.
+
+ GOPATH, err := os.MkdirTemp("", "cshared_test")
+ if err != nil {
+ log.Panic(err)
+ }
+ defer os.RemoveAll(GOPATH)
+ os.Setenv("GOPATH", GOPATH)
+
+ modRoot := filepath.Join(GOPATH, "src", "testcshared")
+ if err := overlayDir(modRoot, "testdata"); err != nil {
+ log.Panic(err)
+ }
+ if err := os.Chdir(modRoot); err != nil {
+ log.Panic(err)
+ }
+ os.Setenv("PWD", modRoot)
+ if err := os.WriteFile("go.mod", []byte("module testcshared\n"), 0666); err != nil {
+ log.Panic(err)
+ }
+
+ // Directory where cgo headers and outputs will be installed.
+ // The installation directory format varies depending on the platform.
+ output, err := exec.Command("go", "list",
+ "-buildmode=c-shared",
+ "-installsuffix", "testcshared",
+ "-f", "{{.Target}}",
+ "./libgo").CombinedOutput()
+ if err != nil {
+ log.Panicf("go list failed: %v\n%s", err, output)
+ }
+ target := string(bytes.TrimSpace(output))
+ libgoname = filepath.Base(target)
+ installdir = filepath.Dir(target)
+ libSuffix = strings.TrimPrefix(filepath.Ext(target), ".")
+
+ return m.Run()
+}
+
+func goEnv(key string) string {
+ out, err := exec.Command("go", "env", key).Output()
+ if err != nil {
+ log.Printf("go env %s failed:\n%s", key, err)
+ log.Panicf("%s", err.(*exec.ExitError).Stderr)
+ }
+ return strings.TrimSpace(string(out))
+}
+
+func cmdToRun(name string) string {
+ return "./" + name + exeSuffix
+}
+
+func adbCmd() []string {
+ cmd := []string{"adb"}
+ if flags := os.Getenv("GOANDROID_ADB_FLAGS"); flags != "" {
+ cmd = append(cmd, strings.Split(flags, " ")...)
+ }
+ return cmd
+}
+
+func adbPush(t *testing.T, filename string) {
+ if runtime.GOOS == GOOS || GOOS != "android" {
+ return
+ }
+ args := append(adbCmd(), "push", filename, fmt.Sprintf("%s/%s", androiddir, filename))
+ cmd := exec.Command(args[0], args[1:]...)
+ if out, err := cmd.CombinedOutput(); err != nil {
+ t.Fatalf("adb command failed: %v\n%s\n", err, out)
+ }
+}
+
+func adbRun(t *testing.T, env []string, adbargs ...string) string {
+ if GOOS != "android" {
+ t.Fatalf("trying to run adb command when operating system is not android.")
+ }
+ args := append(adbCmd(), "exec-out")
+ // Propagate LD_LIBRARY_PATH to the adb shell invocation.
+ for _, e := range env {
+ if strings.Contains(e, "LD_LIBRARY_PATH=") {
+ adbargs = append([]string{e}, adbargs...)
+ break
+ }
+ }
+ shellcmd := fmt.Sprintf("cd %s; %s", androiddir, strings.Join(adbargs, " "))
+ args = append(args, shellcmd)
+ cmd := exec.Command(args[0], args[1:]...)
+ out, err := cmd.CombinedOutput()
+ if err != nil {
+ t.Fatalf("adb command failed: %v\n%s\n", err, out)
+ }
+ return strings.Replace(string(out), "\r", "", -1)
+}
+
+func run(t *testing.T, extraEnv []string, args ...string) string {
+ t.Helper()
+ cmd := exec.Command(args[0], args[1:]...)
+ if len(extraEnv) > 0 {
+ cmd.Env = append(os.Environ(), extraEnv...)
+ }
+
+ if GOOS != "windows" {
+ // TestUnexportedSymbols relies on file descriptor 30
+ // being closed when the program starts, so enforce
+ // that in all cases. (The first three descriptors are
+ // stdin/stdout/stderr, so we just need to make sure
+ // that cmd.ExtraFiles[27] exists and is nil.)
+ cmd.ExtraFiles = make([]*os.File, 28)
+ }
+
+ out, err := cmd.CombinedOutput()
+ if err != nil {
+ t.Fatalf("command failed: %v\n%v\n%s\n", args, err, out)
+ } else {
+ t.Logf("run: %v", args)
+ }
+ return string(out)
+}
+
+func runExe(t *testing.T, extraEnv []string, args ...string) string {
+ t.Helper()
+ if runtime.GOOS != GOOS && GOOS == "android" {
+ return adbRun(t, append(os.Environ(), extraEnv...), args...)
+ }
+ return run(t, extraEnv, args...)
+}
+
+func runCC(t *testing.T, args ...string) string {
+ t.Helper()
+ // This function is run in parallel, so append to a copy of cc
+ // rather than cc itself.
+ return run(t, nil, append(append([]string(nil), cc...), args...)...)
+}
+
+func createHeaders() error {
+ // The 'cgo' command generates a number of additional artifacts,
+ // but we're only interested in the header.
+ // Shunt the rest of the outputs to a temporary directory.
+ objDir, err := os.MkdirTemp("", "testcshared_obj")
+ if err != nil {
+ return err
+ }
+ defer os.RemoveAll(objDir)
+
+ // Generate a C header file for p, which is a non-main dependency
+ // of main package libgo.
+ //
+ // TODO(golang.org/issue/35715): This should be simpler.
+ args := []string{"go", "tool", "cgo",
+ "-objdir", objDir,
+ "-exportheader", "p.h",
+ filepath.Join(".", "p", "p.go")}
+ cmd := exec.Command(args[0], args[1:]...)
+ out, err := cmd.CombinedOutput()
+ if err != nil {
+ return fmt.Errorf("command failed: %v\n%v\n%s\n", args, err, out)
+ }
+
+ // Generate a C header file for libgo itself.
+ args = []string{"go", "install", "-buildmode=c-shared",
+ "-installsuffix", "testcshared", "./libgo"}
+ cmd = exec.Command(args[0], args[1:]...)
+ out, err = cmd.CombinedOutput()
+ if err != nil {
+ return fmt.Errorf("command failed: %v\n%v\n%s\n", args, err, out)
+ }
+
+ args = []string{"go", "build", "-buildmode=c-shared",
+ "-installsuffix", "testcshared",
+ "-o", libgoname,
+ filepath.Join(".", "libgo", "libgo.go")}
+ if GOOS == "windows" && strings.HasSuffix(args[6], ".a") {
+ args[6] = strings.TrimSuffix(args[6], ".a") + ".dll"
+ }
+ cmd = exec.Command(args[0], args[1:]...)
+ out, err = cmd.CombinedOutput()
+ if err != nil {
+ return fmt.Errorf("command failed: %v\n%v\n%s\n", args, err, out)
+ }
+ if GOOS == "windows" {
+ // We can't simply pass -Wl,--out-implib, because this relies on having imports from multiple packages,
+ // which results in the linkers output implib getting overwritten at each step. So instead build the
+ // import library the traditional way, using a def file.
+ err = os.WriteFile("libgo.def",
+ []byte("LIBRARY libgo.dll\nEXPORTS\n\tDidInitRun\n\tDidMainRun\n\tDivu\n\tFromPkg\n\t_cgo_dummy_export\n"),
+ 0644)
+ if err != nil {
+ return fmt.Errorf("unable to write def file: %v", err)
+ }
+ out, err = exec.Command(cc[0], append(cc[1:], "-print-prog-name=dlltool")...).CombinedOutput()
+ if err != nil {
+ return fmt.Errorf("unable to find dlltool path: %v\n%s\n", err, out)
+ }
+ dlltoolpath := strings.TrimSpace(string(out))
+ if filepath.Ext(dlltoolpath) == "" {
+ // Some compilers report slash-separated paths without extensions
+ // instead of ordinary Windows paths.
+ // Try to find the canonical name for the path.
+ if lp, err := exec.LookPath(dlltoolpath); err == nil {
+ dlltoolpath = lp
+ }
+ }
+
+ args := []string{dlltoolpath, "-D", args[6], "-l", libgoname, "-d", "libgo.def"}
+
+ if filepath.Ext(dlltoolpath) == "" {
+ // This is an unfortunate workaround for
+ // https://github.com/mstorsjo/llvm-mingw/issues/205 in which
+ // we basically reimplement the contents of the dlltool.sh
+ // wrapper: https://git.io/JZFlU.
+ // TODO(thanm): remove this workaround once we can upgrade
+ // the compilers on the windows-arm64 builder.
+ dlltoolContents, err := os.ReadFile(args[0])
+ if err != nil {
+ return fmt.Errorf("unable to read dlltool: %v\n", err)
+ }
+ if bytes.HasPrefix(dlltoolContents, []byte("#!/bin/sh")) && bytes.Contains(dlltoolContents, []byte("llvm-dlltool")) {
+ base, name := filepath.Split(args[0])
+ args[0] = filepath.Join(base, "llvm-dlltool")
+ var machine string
+ switch prefix, _, _ := strings.Cut(name, "-"); prefix {
+ case "i686":
+ machine = "i386"
+ case "x86_64":
+ machine = "i386:x86-64"
+ case "armv7":
+ machine = "arm"
+ case "aarch64":
+ machine = "arm64"
+ }
+ if len(machine) > 0 {
+ args = append(args, "-m", machine)
+ }
+ }
+ }
+
+ out, err = exec.Command(args[0], args[1:]...).CombinedOutput()
+ if err != nil {
+ return fmt.Errorf("unable to run dlltool to create import library: %v\n%s\n", err, out)
+ }
+ }
+
+ if runtime.GOOS != GOOS && GOOS == "android" {
+ args = append(adbCmd(), "push", libgoname, fmt.Sprintf("%s/%s", androiddir, libgoname))
+ cmd = exec.Command(args[0], args[1:]...)
+ out, err = cmd.CombinedOutput()
+ if err != nil {
+ return fmt.Errorf("adb command failed: %v\n%s\n", err, out)
+ }
+ }
+
+ return nil
+}
+
+var (
+ headersOnce sync.Once
+ headersErr error
+)
+
+func createHeadersOnce(t *testing.T) {
+ headersOnce.Do(func() {
+ headersErr = createHeaders()
+ })
+ if headersErr != nil {
+ t.Fatal(headersErr)
+ }
+}
+
+func cleanupAndroid() {
+ if GOOS != "android" {
+ return
+ }
+ args := append(adbCmd(), "exec-out", "rm", "-rf", androiddir)
+ cmd := exec.Command(args[0], args[1:]...)
+ out, err := cmd.CombinedOutput()
+ if err != nil {
+ log.Panicf("cleanupAndroid failed: %v\n%s\n", err, out)
+ }
+}
+
+// test0: exported symbols in shared lib are accessible.
+func TestExportedSymbols(t *testing.T) {
+ t.Parallel()
+
+ cmd := "testp0"
+ bin := cmdToRun(cmd)
+
+ createHeadersOnce(t)
+
+ runCC(t, "-I", installdir, "-o", cmd, "main0.c", libgoname)
+ adbPush(t, cmd)
+
+ defer os.Remove(bin)
+
+ out := runExe(t, []string{"LD_LIBRARY_PATH=."}, bin)
+ if strings.TrimSpace(out) != "PASS" {
+ t.Error(out)
+ }
+}
+
+func checkNumberOfExportedFunctionsWindows(t *testing.T, exportAllSymbols bool) {
+ const prog = `
+package main
+
+import "C"
+
+//export GoFunc
+func GoFunc() {
+ println(42)
+}
+
+//export GoFunc2
+func GoFunc2() {
+ println(24)
+}
+
+func main() {
+}
+`
+
+ tmpdir := t.TempDir()
+
+ srcfile := filepath.Join(tmpdir, "test.go")
+ objfile := filepath.Join(tmpdir, "test.dll")
+ if err := os.WriteFile(srcfile, []byte(prog), 0666); err != nil {
+ t.Fatal(err)
+ }
+ argv := []string{"build", "-buildmode=c-shared"}
+ if exportAllSymbols {
+ argv = append(argv, "-ldflags", "-extldflags=-Wl,--export-all-symbols")
+ }
+ argv = append(argv, "-o", objfile, srcfile)
+ out, err := exec.Command("go", argv...).CombinedOutput()
+ if err != nil {
+ t.Fatalf("build failure: %s\n%s\n", err, string(out))
+ }
+
+ f, err := pe.Open(objfile)
+ if err != nil {
+ t.Fatalf("pe.Open failed: %v", err)
+ }
+ defer f.Close()
+ section := f.Section(".edata")
+ if section == nil {
+ t.Skip(".edata section is not present")
+ }
+
+ // TODO: deduplicate this struct from cmd/link/internal/ld/pe.go
+ type IMAGE_EXPORT_DIRECTORY struct {
+ _ [2]uint32
+ _ [2]uint16
+ _ [2]uint32
+ NumberOfFunctions uint32
+ NumberOfNames uint32
+ _ [3]uint32
+ }
+ var e IMAGE_EXPORT_DIRECTORY
+ if err := binary.Read(section.Open(), binary.LittleEndian, &e); err != nil {
+ t.Fatalf("binary.Read failed: %v", err)
+ }
+
+ // Only the two exported functions and _cgo_dummy_export should be exported
+ expectedNumber := uint32(3)
+
+ if exportAllSymbols {
+ if e.NumberOfFunctions <= expectedNumber {
+ t.Fatalf("missing exported functions: %v", e.NumberOfFunctions)
+ }
+ if e.NumberOfNames <= expectedNumber {
+ t.Fatalf("missing exported names: %v", e.NumberOfNames)
+ }
+ } else {
+ if e.NumberOfFunctions != expectedNumber {
+ t.Fatalf("got %d exported functions; want %d", e.NumberOfFunctions, expectedNumber)
+ }
+ if e.NumberOfNames != expectedNumber {
+ t.Fatalf("got %d exported names; want %d", e.NumberOfNames, expectedNumber)
+ }
+ }
+}
+
+func TestNumberOfExportedFunctions(t *testing.T) {
+ if GOOS != "windows" {
+ t.Skip("skipping windows only test")
+ }
+ t.Parallel()
+
+ t.Run("OnlyExported", func(t *testing.T) {
+ checkNumberOfExportedFunctionsWindows(t, false)
+ })
+ t.Run("All", func(t *testing.T) {
+ checkNumberOfExportedFunctionsWindows(t, true)
+ })
+}
+
+// test1: shared library can be dynamically loaded and exported symbols are accessible.
+func TestExportedSymbolsWithDynamicLoad(t *testing.T) {
+ t.Parallel()
+
+ if GOOS == "windows" {
+ t.Logf("Skipping on %s", GOOS)
+ return
+ }
+
+ cmd := "testp1"
+ bin := cmdToRun(cmd)
+
+ createHeadersOnce(t)
+
+ if GOOS != "freebsd" {
+ runCC(t, "-o", cmd, "main1.c", "-ldl")
+ } else {
+ runCC(t, "-o", cmd, "main1.c")
+ }
+ adbPush(t, cmd)
+
+ defer os.Remove(bin)
+
+ out := runExe(t, nil, bin, "./"+libgoname)
+ if strings.TrimSpace(out) != "PASS" {
+ t.Error(out)
+ }
+}
+
+// test2: tests libgo2 which does not export any functions.
+func TestUnexportedSymbols(t *testing.T) {
+ t.Parallel()
+
+ if GOOS == "windows" {
+ t.Logf("Skipping on %s", GOOS)
+ return
+ }
+
+ cmd := "testp2"
+ bin := cmdToRun(cmd)
+ libname := "libgo2." + libSuffix
+
+ run(t,
+ nil,
+ "go", "build",
+ "-buildmode=c-shared",
+ "-installsuffix", "testcshared",
+ "-o", libname, "./libgo2",
+ )
+ adbPush(t, libname)
+
+ linkFlags := "-Wl,--no-as-needed"
+ if GOOS == "darwin" || GOOS == "ios" {
+ linkFlags = ""
+ }
+
+ runCC(t, "-o", cmd, "main2.c", linkFlags, libname)
+ adbPush(t, cmd)
+
+ defer os.Remove(libname)
+ defer os.Remove(bin)
+
+ out := runExe(t, []string{"LD_LIBRARY_PATH=."}, bin)
+
+ if strings.TrimSpace(out) != "PASS" {
+ t.Error(out)
+ }
+}
+
+// test3: tests main.main is exported on android.
+func TestMainExportedOnAndroid(t *testing.T) {
+ t.Parallel()
+
+ switch GOOS {
+ case "android":
+ break
+ default:
+ t.Logf("Skipping on %s", GOOS)
+ return
+ }
+
+ cmd := "testp3"
+ bin := cmdToRun(cmd)
+
+ createHeadersOnce(t)
+
+ runCC(t, "-o", cmd, "main3.c", "-ldl")
+ adbPush(t, cmd)
+
+ defer os.Remove(bin)
+
+ out := runExe(t, nil, bin, "./"+libgoname)
+ if strings.TrimSpace(out) != "PASS" {
+ t.Error(out)
+ }
+}
+
+func testSignalHandlers(t *testing.T, pkgname, cfile, cmd string) {
+ libname := pkgname + "." + libSuffix
+ run(t,
+ nil,
+ "go", "build",
+ "-buildmode=c-shared",
+ "-installsuffix", "testcshared",
+ "-o", libname, pkgname,
+ )
+ adbPush(t, libname)
+ if GOOS != "freebsd" {
+ runCC(t, "-pthread", "-o", cmd, cfile, "-ldl")
+ } else {
+ runCC(t, "-pthread", "-o", cmd, cfile)
+ }
+ adbPush(t, cmd)
+
+ bin := cmdToRun(cmd)
+
+ defer os.Remove(libname)
+ defer os.Remove(bin)
+ defer os.Remove(pkgname + ".h")
+
+ out := runExe(t, nil, bin, "./"+libname)
+ if strings.TrimSpace(out) != "PASS" {
+ t.Error(run(t, nil, bin, libname, "verbose"))
+ }
+}
+
+// test4: test signal handlers
+func TestSignalHandlers(t *testing.T) {
+ t.Parallel()
+ if GOOS == "windows" {
+ t.Logf("Skipping on %s", GOOS)
+ return
+ }
+ testSignalHandlers(t, "./libgo4", "main4.c", "testp4")
+}
+
+// test5: test signal handlers with os/signal.Notify
+func TestSignalHandlersWithNotify(t *testing.T) {
+ t.Parallel()
+ if GOOS == "windows" {
+ t.Logf("Skipping on %s", GOOS)
+ return
+ }
+ testSignalHandlers(t, "./libgo5", "main5.c", "testp5")
+}
+
+func TestPIE(t *testing.T) {
+ t.Parallel()
+
+ switch GOOS {
+ case "linux", "android":
+ break
+ default:
+ t.Logf("Skipping on %s", GOOS)
+ return
+ }
+
+ createHeadersOnce(t)
+
+ f, err := elf.Open(libgoname)
+ if err != nil {
+ t.Fatalf("elf.Open failed: %v", err)
+ }
+ defer f.Close()
+
+ ds := f.SectionByType(elf.SHT_DYNAMIC)
+ if ds == nil {
+ t.Fatalf("no SHT_DYNAMIC section")
+ }
+ d, err := ds.Data()
+ if err != nil {
+ t.Fatalf("can't read SHT_DYNAMIC contents: %v", err)
+ }
+ for len(d) > 0 {
+ var tag elf.DynTag
+ switch f.Class {
+ case elf.ELFCLASS32:
+ tag = elf.DynTag(f.ByteOrder.Uint32(d[:4]))
+ d = d[8:]
+ case elf.ELFCLASS64:
+ tag = elf.DynTag(f.ByteOrder.Uint64(d[:8]))
+ d = d[16:]
+ }
+ if tag == elf.DT_TEXTREL {
+ t.Fatalf("%s has DT_TEXTREL flag", libgoname)
+ }
+ }
+}
+
+// Test that installing a second time recreates the header file.
+func TestCachedInstall(t *testing.T) {
+ tmpdir, err := os.MkdirTemp("", "cshared")
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer os.RemoveAll(tmpdir)
+
+ copyFile(t, filepath.Join(tmpdir, "src", "testcshared", "go.mod"), "go.mod")
+ copyFile(t, filepath.Join(tmpdir, "src", "testcshared", "libgo", "libgo.go"), filepath.Join("libgo", "libgo.go"))
+ copyFile(t, filepath.Join(tmpdir, "src", "testcshared", "p", "p.go"), filepath.Join("p", "p.go"))
+
+ env := append(os.Environ(), "GOPATH="+tmpdir, "GOBIN="+filepath.Join(tmpdir, "bin"))
+
+ buildcmd := []string{"go", "install", "-x", "-buildmode=c-shared", "-installsuffix", "testcshared", "./libgo"}
+
+ cmd := exec.Command(buildcmd[0], buildcmd[1:]...)
+ cmd.Dir = filepath.Join(tmpdir, "src", "testcshared")
+ cmd.Env = env
+ t.Log(buildcmd)
+ out, err := cmd.CombinedOutput()
+ t.Logf("%s", out)
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ var libgoh, ph string
+
+ walker := func(path string, info os.FileInfo, err error) error {
+ if err != nil {
+ t.Fatal(err)
+ }
+ var ps *string
+ switch filepath.Base(path) {
+ case "libgo.h":
+ ps = &libgoh
+ case "p.h":
+ ps = &ph
+ }
+ if ps != nil {
+ if *ps != "" {
+ t.Fatalf("%s found again", *ps)
+ }
+ *ps = path
+ }
+ return nil
+ }
+
+ if err := filepath.Walk(tmpdir, walker); err != nil {
+ t.Fatal(err)
+ }
+
+ if libgoh == "" {
+ t.Fatal("libgo.h not installed")
+ }
+
+ if err := os.Remove(libgoh); err != nil {
+ t.Fatal(err)
+ }
+
+ cmd = exec.Command(buildcmd[0], buildcmd[1:]...)
+ cmd.Dir = filepath.Join(tmpdir, "src", "testcshared")
+ cmd.Env = env
+ t.Log(buildcmd)
+ out, err = cmd.CombinedOutput()
+ t.Logf("%s", out)
+ if err != nil {
+ t.Fatal(err)
+ }
+
+ if _, err := os.Stat(libgoh); err != nil {
+ t.Errorf("libgo.h not installed in second run: %v", err)
+ }
+}
+
+// copyFile copies src to dst.
+func copyFile(t *testing.T, dst, src string) {
+ t.Helper()
+ data, err := os.ReadFile(src)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if err := os.MkdirAll(filepath.Dir(dst), 0777); err != nil {
+ t.Fatal(err)
+ }
+ if err := os.WriteFile(dst, data, 0666); err != nil {
+ t.Fatal(err)
+ }
+}
+
+func TestGo2C2Go(t *testing.T) {
+ switch GOOS {
+ case "darwin", "ios", "windows":
+ // Non-ELF shared libraries don't support the multiple
+ // copies of the runtime package implied by this test.
+ t.Skipf("linking c-shared into Go programs not supported on %s; issue 29061, 49457", GOOS)
+ case "android":
+ t.Skip("test fails on android; issue 29087")
+ }
+
+ t.Parallel()
+
+ tmpdir, err := os.MkdirTemp("", "cshared-TestGo2C2Go")
+ if err != nil {
+ t.Fatal(err)
+ }
+ defer os.RemoveAll(tmpdir)
+
+ lib := filepath.Join(tmpdir, "libtestgo2c2go."+libSuffix)
+ var env []string
+ if GOOS == "windows" && strings.HasSuffix(lib, ".a") {
+ env = append(env, "CGO_LDFLAGS=-Wl,--out-implib,"+lib, "CGO_LDFLAGS_ALLOW=.*")
+ lib = strings.TrimSuffix(lib, ".a") + ".dll"
+ }
+ run(t, env, "go", "build", "-buildmode=c-shared", "-o", lib, "./go2c2go/go")
+
+ cgoCflags := os.Getenv("CGO_CFLAGS")
+ if cgoCflags != "" {
+ cgoCflags += " "
+ }
+ cgoCflags += "-I" + tmpdir
+
+ cgoLdflags := os.Getenv("CGO_LDFLAGS")
+ if cgoLdflags != "" {
+ cgoLdflags += " "
+ }
+ cgoLdflags += "-L" + tmpdir + " -ltestgo2c2go"
+
+ goenv := []string{"CGO_CFLAGS=" + cgoCflags, "CGO_LDFLAGS=" + cgoLdflags}
+
+ ldLibPath := os.Getenv("LD_LIBRARY_PATH")
+ if ldLibPath != "" {
+ ldLibPath += ":"
+ }
+ ldLibPath += tmpdir
+
+ runenv := []string{"LD_LIBRARY_PATH=" + ldLibPath}
+
+ bin := filepath.Join(tmpdir, "m1") + exeSuffix
+ run(t, goenv, "go", "build", "-o", bin, "./go2c2go/m1")
+ runExe(t, runenv, bin)
+
+ bin = filepath.Join(tmpdir, "m2") + exeSuffix
+ run(t, goenv, "go", "build", "-o", bin, "./go2c2go/m2")
+ runExe(t, runenv, bin)
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 02:13:37 +0000