From 43a123c1ae6613b3efeed291fa552ecd909d3acf Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Tue, 16 Apr 2024 21:23:18 +0200 Subject: Adding upstream version 1.20.14. Signed-off-by: Daniel Baumann --- misc/cgo/testcshared/cshared_test.go | 914 +++++++++++++++++++++ misc/cgo/testcshared/overlaydir_test.go | 78 ++ misc/cgo/testcshared/testdata/go2c2go/go/shlib.go | 12 + misc/cgo/testcshared/testdata/go2c2go/m1/c.c | 9 + misc/cgo/testcshared/testdata/go2c2go/m1/main.go | 22 + misc/cgo/testcshared/testdata/go2c2go/m2/main.go | 22 + .../testcshared/testdata/issue36233/issue36233.go | 29 + misc/cgo/testcshared/testdata/libgo/libgo.go | 46 ++ misc/cgo/testcshared/testdata/libgo2/dup2.go | 13 + misc/cgo/testcshared/testdata/libgo2/dup3.go | 13 + misc/cgo/testcshared/testdata/libgo2/libgo2.go | 52 ++ misc/cgo/testcshared/testdata/libgo4/libgo4.go | 45 + misc/cgo/testcshared/testdata/libgo5/libgo5.go | 44 + misc/cgo/testcshared/testdata/main0.c | 42 + misc/cgo/testcshared/testdata/main1.c | 69 ++ misc/cgo/testcshared/testdata/main2.c | 56 ++ misc/cgo/testcshared/testdata/main3.c | 29 + misc/cgo/testcshared/testdata/main4.c | 215 +++++ misc/cgo/testcshared/testdata/main5.c | 199 +++++ misc/cgo/testcshared/testdata/p/p.go | 13 + 20 files changed, 1922 insertions(+) create mode 100644 misc/cgo/testcshared/cshared_test.go create mode 100644 misc/cgo/testcshared/overlaydir_test.go create mode 100644 misc/cgo/testcshared/testdata/go2c2go/go/shlib.go create mode 100644 misc/cgo/testcshared/testdata/go2c2go/m1/c.c create mode 100644 misc/cgo/testcshared/testdata/go2c2go/m1/main.go create mode 100644 misc/cgo/testcshared/testdata/go2c2go/m2/main.go create mode 100644 misc/cgo/testcshared/testdata/issue36233/issue36233.go create mode 100644 misc/cgo/testcshared/testdata/libgo/libgo.go create mode 100644 misc/cgo/testcshared/testdata/libgo2/dup2.go create mode 100644 misc/cgo/testcshared/testdata/libgo2/dup3.go create mode 100644 misc/cgo/testcshared/testdata/libgo2/libgo2.go create mode 100644 misc/cgo/testcshared/testdata/libgo4/libgo4.go create mode 100644 misc/cgo/testcshared/testdata/libgo5/libgo5.go create mode 100644 misc/cgo/testcshared/testdata/main0.c create mode 100644 misc/cgo/testcshared/testdata/main1.c create mode 100644 misc/cgo/testcshared/testdata/main2.c create mode 100644 misc/cgo/testcshared/testdata/main3.c create mode 100644 misc/cgo/testcshared/testdata/main4.c create mode 100644 misc/cgo/testcshared/testdata/main5.c create mode 100644 misc/cgo/testcshared/testdata/p/p.go (limited to 'misc/cgo/testcshared') diff --git a/misc/cgo/testcshared/cshared_test.go b/misc/cgo/testcshared/cshared_test.go new file mode 100644 index 0000000..2b57249 --- /dev/null +++ b/misc/cgo/testcshared/cshared_test.go @@ -0,0 +1,914 @@ +// 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 ( + "bufio" + "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 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) + } + if runtime.GOOS == "linux" { + if _, err := os.Stat("/etc/alpine-release"); err == nil { + fmt.Printf("SKIP - skipping failing test on alpine - go.dev/issue/19938\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) + } + + defer func() { + if installdir != "" { + err := os.RemoveAll(installdir) + if err != nil { + log.Panic(err) + } + } + }() + + 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. + installdir, err = os.MkdirTemp("", "testcshared") + if err != nil { + return err + } + libgoname = "libgo.a" + + args = []string{"go", "build", "-buildmode=c-shared", "-o", filepath.Join(installdir, libgoname), "./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.Helper() + 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.a" + + 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 + ".a" + 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")) + + 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") + env := append(cmd.Environ(), + "GOPATH="+tmpdir, + "GOBIN="+filepath.Join(tmpdir, "bin"), + "GO111MODULE=off", // 'go install' only works in GOPATH mode + ) + 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.a") + 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) +} + +func TestIssue36233(t *testing.T) { + t.Parallel() + + // Test that the export header uses GoComplex64 and GoComplex128 + // for complex types. + + tmpdir, err := os.MkdirTemp("", "cshared-TestIssue36233") + if err != nil { + t.Fatal(err) + } + defer os.RemoveAll(tmpdir) + + const exportHeader = "issue36233.h" + + run(t, nil, "go", "tool", "cgo", "-exportheader", exportHeader, "-objdir", tmpdir, "./issue36233/issue36233.go") + data, err := os.ReadFile(exportHeader) + if err != nil { + t.Fatal(err) + } + + funcs := []struct{ name, signature string }{ + {"exportComplex64", "GoComplex64 exportComplex64(GoComplex64 v)"}, + {"exportComplex128", "GoComplex128 exportComplex128(GoComplex128 v)"}, + {"exportComplexfloat", "GoComplex64 exportComplexfloat(GoComplex64 v)"}, + {"exportComplexdouble", "GoComplex128 exportComplexdouble(GoComplex128 v)"}, + } + + scanner := bufio.NewScanner(bytes.NewReader(data)) + var found int + for scanner.Scan() { + b := scanner.Bytes() + for _, fn := range funcs { + if bytes.Contains(b, []byte(fn.name)) { + found++ + if !bytes.Contains(b, []byte(fn.signature)) { + t.Errorf("function signature mismatch; got %q, want %q", b, fn.signature) + } + } + } + } + if err = scanner.Err(); err != nil { + t.Errorf("scanner encountered error: %v", err) + } + if found != len(funcs) { + t.Error("missing functions") + } +} diff --git a/misc/cgo/testcshared/overlaydir_test.go b/misc/cgo/testcshared/overlaydir_test.go new file mode 100644 index 0000000..85d6b44 --- /dev/null +++ b/misc/cgo/testcshared/overlaydir_test.go @@ -0,0 +1,78 @@ +// 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 cshared_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 + }) +} diff --git a/misc/cgo/testcshared/testdata/go2c2go/go/shlib.go b/misc/cgo/testcshared/testdata/go2c2go/go/shlib.go new file mode 100644 index 0000000..76a5323 --- /dev/null +++ b/misc/cgo/testcshared/testdata/go2c2go/go/shlib.go @@ -0,0 +1,12 @@ +// Copyright 2018 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 "C" + +//export GoFunc +func GoFunc() int { return 1 } + +func main() {} diff --git a/misc/cgo/testcshared/testdata/go2c2go/m1/c.c b/misc/cgo/testcshared/testdata/go2c2go/m1/c.c new file mode 100644 index 0000000..0e8fac4 --- /dev/null +++ b/misc/cgo/testcshared/testdata/go2c2go/m1/c.c @@ -0,0 +1,9 @@ +// Copyright 2018 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. + +#include "libtestgo2c2go.h" + +int CFunc(void) { + return (GoFunc() << 8) + 2; +} diff --git a/misc/cgo/testcshared/testdata/go2c2go/m1/main.go b/misc/cgo/testcshared/testdata/go2c2go/m1/main.go new file mode 100644 index 0000000..17ba1eb --- /dev/null +++ b/misc/cgo/testcshared/testdata/go2c2go/m1/main.go @@ -0,0 +1,22 @@ +// Copyright 2018 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 + +// extern int CFunc(void); +import "C" + +import ( + "fmt" + "os" +) + +func main() { + got := C.CFunc() + const want = (1 << 8) | 2 + if got != want { + fmt.Printf("got %#x, want %#x\n", got, want) + os.Exit(1) + } +} diff --git a/misc/cgo/testcshared/testdata/go2c2go/m2/main.go b/misc/cgo/testcshared/testdata/go2c2go/m2/main.go new file mode 100644 index 0000000..91bf308 --- /dev/null +++ b/misc/cgo/testcshared/testdata/go2c2go/m2/main.go @@ -0,0 +1,22 @@ +// Copyright 2018 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 + +// #include "libtestgo2c2go.h" +import "C" + +import ( + "fmt" + "os" +) + +func main() { + got := C.GoFunc() + const want = 1 + if got != want { + fmt.Printf("got %#x, want %#x\n", got, want) + os.Exit(1) + } +} diff --git a/misc/cgo/testcshared/testdata/issue36233/issue36233.go b/misc/cgo/testcshared/testdata/issue36233/issue36233.go new file mode 100644 index 0000000..d0d1e5d --- /dev/null +++ b/misc/cgo/testcshared/testdata/issue36233/issue36233.go @@ -0,0 +1,29 @@ +// Copyright 2022 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 + +// #include +import "C" + +//export exportComplex64 +func exportComplex64(v complex64) complex64 { + return v +} + +//export exportComplex128 +func exportComplex128(v complex128) complex128 { + return v +} + +//export exportComplexfloat +func exportComplexfloat(v C.complexfloat) C.complexfloat { + return v +} + +//export exportComplexdouble +func exportComplexdouble(v C.complexdouble) C.complexdouble { + return v +} + +func main() {} diff --git a/misc/cgo/testcshared/testdata/libgo/libgo.go b/misc/cgo/testcshared/testdata/libgo/libgo.go new file mode 100644 index 0000000..0634417 --- /dev/null +++ b/misc/cgo/testcshared/testdata/libgo/libgo.go @@ -0,0 +1,46 @@ +// Copyright 2015 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 ( + "syscall" + _ "testcshared/p" + "time" +) + +import "C" + +var initCh = make(chan int, 1) +var ranMain bool + +func init() { + // emulate an exceedingly slow package initialization function + time.Sleep(100 * time.Millisecond) + initCh <- 42 +} + +func main() { + ranMain = true +} + +//export DidInitRun +func DidInitRun() bool { + select { + case x := <-initCh: + if x != 42 { + // Just in case initCh was not correctly made. + println("want init value of 42, got: ", x) + syscall.Exit(2) + } + return true + default: + return false + } +} + +//export DidMainRun +func DidMainRun() bool { + return ranMain +} diff --git a/misc/cgo/testcshared/testdata/libgo2/dup2.go b/misc/cgo/testcshared/testdata/libgo2/dup2.go new file mode 100644 index 0000000..d343aa5 --- /dev/null +++ b/misc/cgo/testcshared/testdata/libgo2/dup2.go @@ -0,0 +1,13 @@ +// Copyright 2015 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. + +// +build darwin dragonfly freebsd linux,!arm64,!riscv64 netbsd openbsd + +package main + +import "syscall" + +func dup2(oldfd, newfd int) error { + return syscall.Dup2(oldfd, newfd) +} diff --git a/misc/cgo/testcshared/testdata/libgo2/dup3.go b/misc/cgo/testcshared/testdata/libgo2/dup3.go new file mode 100644 index 0000000..459f0dc --- /dev/null +++ b/misc/cgo/testcshared/testdata/libgo2/dup3.go @@ -0,0 +1,13 @@ +// Copyright 2015 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. + +// +build linux,arm64 linux,riscv64 + +package main + +import "syscall" + +func dup2(oldfd, newfd int) error { + return syscall.Dup3(oldfd, newfd, 0) +} diff --git a/misc/cgo/testcshared/testdata/libgo2/libgo2.go b/misc/cgo/testcshared/testdata/libgo2/libgo2.go new file mode 100644 index 0000000..e57c93b --- /dev/null +++ b/misc/cgo/testcshared/testdata/libgo2/libgo2.go @@ -0,0 +1,52 @@ +// Copyright 2015 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. + +// +build darwin dragonfly freebsd linux netbsd openbsd solaris + +package main + +// Test a shared library created by -buildmode=c-shared that does not +// export anything. + +import ( + "fmt" + "os" + "syscall" +) + +// To test this we want to communicate between the main program and +// the shared library without using any exported symbols. The init +// function creates a pipe and Dups the read end to a known number +// that the C code can also use. + +const ( + fd = 30 +) + +func init() { + var p [2]int + if e := syscall.Pipe(p[0:]); e != nil { + fmt.Fprintf(os.Stderr, "pipe: %v\n", e) + os.Exit(2) + } + + if e := dup2(p[0], fd); e != nil { + fmt.Fprintf(os.Stderr, "dup2: %v\n", e) + os.Exit(2) + } + + const str = "PASS" + if n, e := syscall.Write(p[1], []byte(str)); e != nil || n != len(str) { + fmt.Fprintf(os.Stderr, "write: %d %v\n", n, e) + os.Exit(2) + } + + if e := syscall.Close(p[1]); e != nil { + fmt.Fprintf(os.Stderr, "close: %v\n", e) + os.Exit(2) + } +} + +func main() { +} diff --git a/misc/cgo/testcshared/testdata/libgo4/libgo4.go b/misc/cgo/testcshared/testdata/libgo4/libgo4.go new file mode 100644 index 0000000..ab40b75 --- /dev/null +++ b/misc/cgo/testcshared/testdata/libgo4/libgo4.go @@ -0,0 +1,45 @@ +// Copyright 2015 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 "C" + +import ( + "fmt" + "os" + "runtime" +) + +// RunGoroutines starts some goroutines that don't do anything. +// The idea is to get some threads going, so that a signal will be delivered +// to a thread started by Go. +//export RunGoroutines +func RunGoroutines() { + for i := 0; i < 4; i++ { + go func() { + runtime.LockOSThread() + select {} + }() + } +} + +var P *byte + +// TestSEGV makes sure that an invalid address turns into a run-time Go panic. +//export TestSEGV +func TestSEGV() { + defer func() { + if recover() == nil { + fmt.Fprintln(os.Stderr, "no panic from segv") + os.Exit(1) + } + }() + *P = 0 + fmt.Fprintln(os.Stderr, "continued after segv") + os.Exit(1) +} + +func main() { +} diff --git a/misc/cgo/testcshared/testdata/libgo5/libgo5.go b/misc/cgo/testcshared/testdata/libgo5/libgo5.go new file mode 100644 index 0000000..94e5d21 --- /dev/null +++ b/misc/cgo/testcshared/testdata/libgo5/libgo5.go @@ -0,0 +1,44 @@ +// Copyright 2015 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 "C" + +import ( + "os" + "os/signal" + "syscall" + "time" +) + +// The channel used to read SIGIO signals. +var sigioChan chan os.Signal + +// CatchSIGIO starts catching SIGIO signals. +//export CatchSIGIO +func CatchSIGIO() { + sigioChan = make(chan os.Signal, 1) + signal.Notify(sigioChan, syscall.SIGIO) +} + +// ResetSIGIO stops catching SIGIO signals. +//export ResetSIGIO +func ResetSIGIO() { + signal.Reset(syscall.SIGIO) +} + +// SawSIGIO returns whether we saw a SIGIO within a brief pause. +//export SawSIGIO +func SawSIGIO() C.int { + select { + case <-sigioChan: + return 1 + case <-time.After(100 * time.Millisecond): + return 0 + } +} + +func main() { +} diff --git a/misc/cgo/testcshared/testdata/main0.c b/misc/cgo/testcshared/testdata/main0.c new file mode 100644 index 0000000..39ef7e3 --- /dev/null +++ b/misc/cgo/testcshared/testdata/main0.c @@ -0,0 +1,42 @@ +// Copyright 2015 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. + +#include +#include + +#include "p.h" +#include "libgo.h" + +// Tests libgo.so to export the following functions. +// int8_t DidInitRun(); +// int8_t DidMainRun(); +// int32_t FromPkg(); +// uint32_t Divu(uint32_t, uint32_t); +int main(void) { + int8_t ran_init = DidInitRun(); + if (!ran_init) { + fprintf(stderr, "ERROR: DidInitRun returned unexpected results: %d\n", + ran_init); + return 1; + } + int8_t ran_main = DidMainRun(); + if (ran_main) { + fprintf(stderr, "ERROR: DidMainRun returned unexpected results: %d\n", + ran_main); + return 1; + } + int32_t from_pkg = FromPkg(); + if (from_pkg != 1024) { + fprintf(stderr, "ERROR: FromPkg=%d, want %d\n", from_pkg, 1024); + return 1; + } + uint32_t divu = Divu(2264, 31); + if (divu != 73) { + fprintf(stderr, "ERROR: Divu(2264, 31)=%d, want %d\n", divu, 73); + return 1; + } + // test.bash looks for "PASS" to ensure this program has reached the end. + printf("PASS\n"); + return 0; +} diff --git a/misc/cgo/testcshared/testdata/main1.c b/misc/cgo/testcshared/testdata/main1.c new file mode 100644 index 0000000..420dd1e --- /dev/null +++ b/misc/cgo/testcshared/testdata/main1.c @@ -0,0 +1,69 @@ +// Copyright 2015 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. + +#include +#include +#include + +int check_int8(void* handle, const char* fname, int8_t want) { + int8_t (*fn)(); + fn = (int8_t (*)())dlsym(handle, fname); + if (!fn) { + fprintf(stderr, "ERROR: missing %s: %s\n", fname, dlerror()); + return 1; + } + signed char ret = fn(); + if (ret != want) { + fprintf(stderr, "ERROR: %s=%d, want %d\n", fname, ret, want); + return 1; + } + return 0; +} + +int check_int32(void* handle, const char* fname, int32_t want) { + int32_t (*fn)(); + fn = (int32_t (*)())dlsym(handle, fname); + if (!fn) { + fprintf(stderr, "ERROR: missing %s: %s\n", fname, dlerror()); + return 1; + } + int32_t ret = fn(); + if (ret != want) { + fprintf(stderr, "ERROR: %s=%d, want %d\n", fname, ret, want); + return 1; + } + return 0; +} + +// Tests libgo.so to export the following functions. +// int8_t DidInitRun() // returns true +// int8_t DidMainRun() // returns true +// int32_t FromPkg() // returns 1024 +int main(int argc, char** argv) { + void* handle = dlopen(argv[1], RTLD_LAZY | RTLD_GLOBAL); + if (!handle) { + fprintf(stderr, "ERROR: failed to open the shared library: %s\n", + dlerror()); + return 2; + } + + int ret = 0; + ret = check_int8(handle, "DidInitRun", 1); + if (ret != 0) { + return ret; + } + + ret = check_int8(handle, "DidMainRun", 0); + if (ret != 0) { + return ret; + } + + ret = check_int32(handle, "FromPkg", 1024); + if (ret != 0) { + return ret; + } + // test.bash looks for "PASS" to ensure this program has reached the end. + printf("PASS\n"); + return 0; +} diff --git a/misc/cgo/testcshared/testdata/main2.c b/misc/cgo/testcshared/testdata/main2.c new file mode 100644 index 0000000..f89bcca --- /dev/null +++ b/misc/cgo/testcshared/testdata/main2.c @@ -0,0 +1,56 @@ +// Copyright 2015 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. + +#include +#include +#include +#include +#include +#include + +#define fd (30) + +// Tests libgo2.so, which does not export any functions. +// Read a string from the file descriptor and print it. +int main(void) { + int i; + ssize_t n; + char buf[20]; + struct timespec ts; + + // The descriptor will be initialized in a thread, so we have to + // give a chance to get opened. + for (i = 0; i < 200; i++) { + n = read(fd, buf, sizeof buf); + if (n >= 0) + break; + if (errno != EBADF && errno != EINVAL) { + fprintf(stderr, "BUG: read: %s\n", strerror(errno)); + return 2; + } + + // An EBADF error means that the shared library has not opened the + // descriptor yet. + ts.tv_sec = 0; + ts.tv_nsec = 10000000; + nanosleep(&ts, NULL); + } + + if (n < 0) { + fprintf(stderr, "BUG: failed to read any data from pipe\n"); + return 2; + } + + if (n == 0) { + fprintf(stderr, "BUG: unexpected EOF\n"); + return 2; + } + + if (n == sizeof buf) { + n--; + } + buf[n] = '\0'; + printf("%s\n", buf); + return 0; +} diff --git a/misc/cgo/testcshared/testdata/main3.c b/misc/cgo/testcshared/testdata/main3.c new file mode 100644 index 0000000..49cc055 --- /dev/null +++ b/misc/cgo/testcshared/testdata/main3.c @@ -0,0 +1,29 @@ +// Copyright 2015 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. + +#include +#include +#include + +// Tests "main.main" is exported on android/arm, +// which golang.org/x/mobile/app depends on. +int main(int argc, char** argv) { + void* handle = dlopen(argv[1], RTLD_LAZY | RTLD_GLOBAL); + if (!handle) { + fprintf(stderr, "ERROR: failed to open the shared library: %s\n", + dlerror()); + return 2; + } + + uintptr_t main_fn = (uintptr_t)dlsym(handle, "main.main"); + if (!main_fn) { + fprintf(stderr, "ERROR: missing main.main: %s\n", dlerror()); + return 2; + } + + // TODO(hyangah): check that main.main can run. + + printf("PASS\n"); + return 0; +} diff --git a/misc/cgo/testcshared/testdata/main4.c b/misc/cgo/testcshared/testdata/main4.c new file mode 100644 index 0000000..355cdef --- /dev/null +++ b/misc/cgo/testcshared/testdata/main4.c @@ -0,0 +1,215 @@ +// Copyright 2015 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. + +// Test that a signal handler that uses up stack space does not crash +// if the signal is delivered to a thread running a goroutine. +// This is a lot like misc/cgo/testcarchive/main2.c. + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +static void die(const char* msg) { + perror(msg); + exit(EXIT_FAILURE); +} + +static volatile sig_atomic_t sigioSeen; + +// Use up some stack space. +static void recur(int i, char *p) { + char a[1024]; + + *p = '\0'; + if (i > 0) { + recur(i - 1, a); + } +} + +// Signal handler that uses up more stack space than a goroutine will have. +static void ioHandler(int signo, siginfo_t* info, void* ctxt) { + char a[1024]; + + recur(4, a); + sigioSeen = 1; +} + +static jmp_buf jmp; +static char* nullPointer; + +// Signal handler for SIGSEGV on a C thread. +static void segvHandler(int signo, siginfo_t* info, void* ctxt) { + sigset_t mask; + int i; + + if (sigemptyset(&mask) < 0) { + die("sigemptyset"); + } + if (sigaddset(&mask, SIGSEGV) < 0) { + die("sigaddset"); + } + i = sigprocmask(SIG_UNBLOCK, &mask, NULL); + if (i != 0) { + fprintf(stderr, "sigprocmask: %s\n", strerror(i)); + exit(EXIT_FAILURE); + } + + // Don't try this at home. + longjmp(jmp, signo); + + // We should never get here. + abort(); +} + +int main(int argc, char** argv) { + int verbose; + struct sigaction sa; + void* handle; + void (*fn)(void); + sigset_t mask; + int i; + struct timespec ts; + + verbose = argc > 2; + setvbuf(stdout, NULL, _IONBF, 0); + + // Call setsid so that we can use kill(0, SIGIO) below. + // Don't check the return value so that this works both from + // a job control shell and from a shell script. + setsid(); + + if (verbose) { + printf("calling sigaction\n"); + } + + memset(&sa, 0, sizeof sa); + sa.sa_sigaction = ioHandler; + if (sigemptyset(&sa.sa_mask) < 0) { + die("sigemptyset"); + } + sa.sa_flags = SA_SIGINFO; + if (sigaction(SIGIO, &sa, NULL) < 0) { + die("sigaction"); + } + + sa.sa_sigaction = segvHandler; + if (sigaction(SIGSEGV, &sa, NULL) < 0 || sigaction(SIGBUS, &sa, NULL) < 0) { + die("sigaction"); + } + + if (verbose) { + printf("calling dlopen\n"); + } + + handle = dlopen(argv[1], RTLD_NOW | RTLD_GLOBAL); + if (handle == NULL) { + fprintf(stderr, "%s\n", dlerror()); + exit(EXIT_FAILURE); + } + + if (verbose) { + printf("calling dlsym\n"); + } + + // Start some goroutines. + fn = (void(*)(void))dlsym(handle, "RunGoroutines"); + if (fn == NULL) { + fprintf(stderr, "%s\n", dlerror()); + exit(EXIT_FAILURE); + } + + if (verbose) { + printf("calling RunGoroutines\n"); + } + + fn(); + + // Block SIGIO in this thread to make it more likely that it + // will be delivered to a goroutine. + + if (verbose) { + printf("calling pthread_sigmask\n"); + } + + if (sigemptyset(&mask) < 0) { + die("sigemptyset"); + } + if (sigaddset(&mask, SIGIO) < 0) { + die("sigaddset"); + } + i = pthread_sigmask(SIG_BLOCK, &mask, NULL); + if (i != 0) { + fprintf(stderr, "pthread_sigmask: %s\n", strerror(i)); + exit(EXIT_FAILURE); + } + + if (verbose) { + printf("calling kill\n"); + } + + if (kill(0, SIGIO) < 0) { + die("kill"); + } + + if (verbose) { + printf("waiting for sigioSeen\n"); + } + + // Wait until the signal has been delivered. + i = 0; + while (!sigioSeen) { + ts.tv_sec = 0; + ts.tv_nsec = 1000000; + nanosleep(&ts, NULL); + i++; + if (i > 5000) { + fprintf(stderr, "looping too long waiting for signal\n"); + exit(EXIT_FAILURE); + } + } + + if (verbose) { + printf("calling setjmp\n"); + } + + // Test that a SIGSEGV on this thread is delivered to us. + if (setjmp(jmp) == 0) { + if (verbose) { + printf("triggering SIGSEGV\n"); + } + + *nullPointer = '\0'; + + fprintf(stderr, "continued after address error\n"); + exit(EXIT_FAILURE); + } + + if (verbose) { + printf("calling dlsym\n"); + } + + // Make sure that a SIGSEGV in Go causes a run-time panic. + fn = (void (*)(void))dlsym(handle, "TestSEGV"); + if (fn == NULL) { + fprintf(stderr, "%s\n", dlerror()); + exit(EXIT_FAILURE); + } + + if (verbose) { + printf("calling TestSEGV\n"); + } + + fn(); + + printf("PASS\n"); + return 0; +} diff --git a/misc/cgo/testcshared/testdata/main5.c b/misc/cgo/testcshared/testdata/main5.c new file mode 100644 index 0000000..1bc9910 --- /dev/null +++ b/misc/cgo/testcshared/testdata/main5.c @@ -0,0 +1,199 @@ +// Copyright 2015 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. + +// Test that a signal handler works in non-Go code when using +// os/signal.Notify. +// This is a lot like misc/cgo/testcarchive/main3.c. + +#include +#include +#include +#include +#include +#include +#include + +static void die(const char* msg) { + perror(msg); + exit(EXIT_FAILURE); +} + +static volatile sig_atomic_t sigioSeen; + +static void ioHandler(int signo, siginfo_t* info, void* ctxt) { + sigioSeen = 1; +} + +int main(int argc, char** argv) { + int verbose; + struct sigaction sa; + void* handle; + void (*fn1)(void); + int (*sawSIGIO)(void); + int i; + struct timespec ts; + + verbose = argc > 2; + setvbuf(stdout, NULL, _IONBF, 0); + + if (verbose) { + printf("calling sigaction\n"); + } + + memset(&sa, 0, sizeof sa); + sa.sa_sigaction = ioHandler; + if (sigemptyset(&sa.sa_mask) < 0) { + die("sigemptyset"); + } + sa.sa_flags = SA_SIGINFO; + if (sigaction(SIGIO, &sa, NULL) < 0) { + die("sigaction"); + } + + if (verbose) { + printf("calling dlopen\n"); + } + + handle = dlopen(argv[1], RTLD_NOW | RTLD_GLOBAL); + if (handle == NULL) { + fprintf(stderr, "%s\n", dlerror()); + exit(EXIT_FAILURE); + } + + // At this point there should not be a Go signal handler + // installed for SIGIO. + + if (verbose) { + printf("raising SIGIO\n"); + } + + if (raise(SIGIO) < 0) { + die("raise"); + } + + if (verbose) { + printf("waiting for sigioSeen\n"); + } + + // Wait until the signal has been delivered. + i = 0; + while (!sigioSeen) { + ts.tv_sec = 0; + ts.tv_nsec = 1000000; + nanosleep(&ts, NULL); + i++; + if (i > 5000) { + fprintf(stderr, "looping too long waiting for signal\n"); + exit(EXIT_FAILURE); + } + } + + sigioSeen = 0; + + // Tell the Go code to catch SIGIO. + + if (verbose) { + printf("calling dlsym\n"); + } + + fn1 = (void(*)(void))dlsym(handle, "CatchSIGIO"); + if (fn1 == NULL) { + fprintf(stderr, "%s\n", dlerror()); + exit(EXIT_FAILURE); + } + + if (verbose) { + printf("calling CatchSIGIO\n"); + } + + fn1(); + + if (verbose) { + printf("raising SIGIO\n"); + } + + if (raise(SIGIO) < 0) { + die("raise"); + } + + if (verbose) { + printf("calling dlsym\n"); + } + + // Check that the Go code saw SIGIO. + sawSIGIO = (int (*)(void))dlsym(handle, "SawSIGIO"); + if (sawSIGIO == NULL) { + fprintf(stderr, "%s\n", dlerror()); + exit(EXIT_FAILURE); + } + + if (verbose) { + printf("calling SawSIGIO\n"); + } + + if (!sawSIGIO()) { + fprintf(stderr, "Go handler did not see SIGIO\n"); + exit(EXIT_FAILURE); + } + + if (sigioSeen != 0) { + fprintf(stderr, "C handler saw SIGIO when only Go handler should have\n"); + exit(EXIT_FAILURE); + } + + // Tell the Go code to stop catching SIGIO. + + if (verbose) { + printf("calling dlsym\n"); + } + + fn1 = (void(*)(void))dlsym(handle, "ResetSIGIO"); + if (fn1 == NULL) { + fprintf(stderr, "%s\n", dlerror()); + exit(EXIT_FAILURE); + } + + if (verbose) { + printf("calling ResetSIGIO\n"); + } + + fn1(); + + if (verbose) { + printf("raising SIGIO\n"); + } + + if (raise(SIGIO) < 0) { + die("raise"); + } + + if (verbose) { + printf("calling SawSIGIO\n"); + } + + if (sawSIGIO()) { + fprintf(stderr, "Go handler saw SIGIO after Reset\n"); + exit(EXIT_FAILURE); + } + + if (verbose) { + printf("waiting for sigioSeen\n"); + } + + // Wait until the signal has been delivered. + i = 0; + while (!sigioSeen) { + ts.tv_sec = 0; + ts.tv_nsec = 1000000; + nanosleep(&ts, NULL); + i++; + if (i > 5000) { + fprintf(stderr, "looping too long waiting for signal\n"); + exit(EXIT_FAILURE); + } + } + + printf("PASS\n"); + return 0; +} diff --git a/misc/cgo/testcshared/testdata/p/p.go b/misc/cgo/testcshared/testdata/p/p.go new file mode 100644 index 0000000..0f02cf3 --- /dev/null +++ b/misc/cgo/testcshared/testdata/p/p.go @@ -0,0 +1,13 @@ +// Copyright 2015 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 p + +import "C" + +//export FromPkg +func FromPkg() int32 { return 1024 } + +//export Divu +func Divu(a, b uint32) uint32 { return a / b } -- cgit v1.2.3