diff options
Diffstat (limited to 'misc/cgo/testshared')
36 files changed, 1785 insertions, 0 deletions
diff --git a/misc/cgo/testshared/overlaydir_test.go b/misc/cgo/testshared/overlaydir_test.go new file mode 100644 index 0000000..eb587a2 --- /dev/null +++ b/misc/cgo/testshared/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 shared_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/testshared/shared_test.go b/misc/cgo/testshared/shared_test.go new file mode 100644 index 0000000..03da8f9 --- /dev/null +++ b/misc/cgo/testshared/shared_test.go @@ -0,0 +1,1124 @@ +// 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 shared_test + +import ( + "bufio" + "bytes" + "debug/elf" + "encoding/binary" + "flag" + "fmt" + "go/build" + "io" + "log" + "os" + "os/exec" + "path/filepath" + "regexp" + "runtime" + "sort" + "strconv" + "strings" + "testing" + "time" +) + +var gopathInstallDir, gorootInstallDir string +var oldGOROOT string + +// This is the smallest set of packages we can link into a shared +// library (runtime/cgo is built implicitly). +var minpkgs = []string{"runtime", "sync/atomic"} +var soname = "libruntime,sync-atomic.so" + +var testX = flag.Bool("testx", false, "if true, pass -x to 'go' subcommands invoked by the test") +var testWork = flag.Bool("testwork", false, "if true, log and do not delete the temporary working directory") + +// run runs a command and calls t.Errorf if it fails. +func run(t *testing.T, msg string, args ...string) { + runWithEnv(t, msg, nil, args...) +} + +// runWithEnv runs a command under the given environment and calls t.Errorf if it fails. +func runWithEnv(t *testing.T, msg string, env []string, args ...string) { + c := exec.Command(args[0], args[1:]...) + if len(env) != 0 { + c.Env = append(os.Environ(), env...) + } + if output, err := c.CombinedOutput(); err != nil { + t.Errorf("executing %s (%s) failed %s:\n%s", strings.Join(args, " "), msg, err, output) + } +} + +// goCmd invokes the go tool with the installsuffix set up by TestMain. It calls +// t.Fatalf if the command fails. +func goCmd(t *testing.T, args ...string) string { + newargs := []string{args[0]} + if *testX && args[0] != "env" { + newargs = append(newargs, "-x", "-ldflags=-v") + } + newargs = append(newargs, args[1:]...) + c := exec.Command(filepath.Join(oldGOROOT, "bin", "go"), newargs...) + stderr := new(strings.Builder) + c.Stderr = stderr + + if testing.Verbose() && t == nil { + fmt.Fprintf(os.Stderr, "+ go %s\n", strings.Join(args, " ")) + c.Stderr = os.Stderr + } + output, err := c.Output() + + if err != nil { + if t != nil { + t.Helper() + t.Fatalf("executing %s failed %v:\n%s", strings.Join(c.Args, " "), err, stderr) + } else { + // Panic instead of using log.Fatalf so that deferred cleanup may run in testMain. + log.Panicf("executing %s failed %v:\n%s", strings.Join(c.Args, " "), err, stderr) + } + } + if testing.Verbose() && t != nil { + t.Logf("go %s", strings.Join(args, " ")) + if stderr.Len() > 0 { + t.Logf("%s", stderr) + } + } + return string(bytes.TrimSpace(output)) +} + +// TestMain calls testMain so that the latter can use defer (TestMain exits with os.Exit). +func testMain(m *testing.M) (int, error) { + cwd, err := os.Getwd() + if err != nil { + log.Fatal(err) + } + oldGOROOT = filepath.Join(cwd, "../../..") + + workDir, err := os.MkdirTemp("", "shared_test") + if err != nil { + return 0, err + } + if *testWork || testing.Verbose() { + fmt.Printf("+ mkdir -p %s\n", workDir) + } + if !*testWork { + defer os.RemoveAll(workDir) + } + + // -buildmode=shared fundamentally does not work in module mode. + // (It tries to share package dependencies across builds, but in module mode + // each module has its own distinct set of dependency versions.) + // We would like to eliminate it (see https://go.dev/issue/47788), + // but first need to figure out a replacement that covers the small subset + // of use-cases where -buildmode=shared still works today. + // For now, run the tests in GOPATH mode only. + os.Setenv("GO111MODULE", "off") + + // Some tests need to edit the source in GOPATH, so copy this directory to a + // temporary directory and chdir to that. + gopath := filepath.Join(workDir, "gopath") + modRoot, err := cloneTestdataModule(gopath) + if err != nil { + return 0, err + } + if testing.Verbose() { + fmt.Printf("+ export GOPATH=%s\n", gopath) + fmt.Printf("+ cd %s\n", modRoot) + } + os.Setenv("GOPATH", gopath) + // Explicitly override GOBIN as well, in case it was set through a GOENV file. + os.Setenv("GOBIN", filepath.Join(gopath, "bin")) + os.Chdir(modRoot) + os.Setenv("PWD", modRoot) + + // The test also needs to install libraries into GOROOT/pkg, so copy the + // subset of GOROOT that we need. + // + // TODO(golang.org/issue/28553): Rework -buildmode=shared so that it does not + // need to write to GOROOT. + goroot := filepath.Join(workDir, "goroot") + if err := cloneGOROOTDeps(goroot); err != nil { + return 0, err + } + if testing.Verbose() { + fmt.Fprintf(os.Stderr, "+ export GOROOT=%s\n", goroot) + } + os.Setenv("GOROOT", goroot) + + myContext := build.Default + myContext.GOROOT = goroot + myContext.GOPATH = gopath + + // All tests depend on runtime being built into a shared library. Because + // that takes a few seconds, do it here and have all tests use the version + // built here. + goCmd(nil, append([]string{"install", "-buildmode=shared"}, minpkgs...)...) + + shlib := goCmd(nil, "list", "-linkshared", "-f={{.Shlib}}", "runtime") + if shlib != "" { + gorootInstallDir = filepath.Dir(shlib) + } + + myContext.InstallSuffix = "_dynlink" + depP, err := myContext.Import("./depBase", ".", build.ImportComment) + if err != nil { + return 0, fmt.Errorf("import failed: %v", err) + } + if depP.PkgTargetRoot == "" { + gopathInstallDir = filepath.Dir(goCmd(nil, "list", "-buildmode=shared", "-f", "{{.Target}}", "./depBase")) + } else { + gopathInstallDir = filepath.Join(depP.PkgTargetRoot, "testshared") + } + return m.Run(), nil +} + +func TestMain(m *testing.M) { + log.SetFlags(log.Lshortfile) + flag.Parse() + + exitCode, err := testMain(m) + if err != nil { + log.Fatal(err) + } + os.Exit(exitCode) +} + +// cloneTestdataModule clones the packages from src/testshared into gopath. +// It returns the directory within gopath at which the module root is located. +func cloneTestdataModule(gopath string) (string, error) { + modRoot := filepath.Join(gopath, "src", "testshared") + if err := overlayDir(modRoot, "testdata"); err != nil { + return "", err + } + if err := os.WriteFile(filepath.Join(modRoot, "go.mod"), []byte("module testshared\n"), 0644); err != nil { + return "", err + } + return modRoot, nil +} + +// cloneGOROOTDeps copies (or symlinks) the portions of GOROOT/src and +// GOROOT/pkg relevant to this test into the given directory. +// It must be run from within the testdata module. +func cloneGOROOTDeps(goroot string) error { + // Before we clone GOROOT, figure out which packages we need to copy over. + listArgs := []string{ + "list", + "-deps", + "-f", "{{if and .Standard (not .ForTest)}}{{.ImportPath}}{{end}}", + } + stdDeps := goCmd(nil, append(listArgs, minpkgs...)...) + testdataDeps := goCmd(nil, append(listArgs, "-test", "./...")...) + + pkgs := append(strings.Split(strings.TrimSpace(stdDeps), "\n"), + strings.Split(strings.TrimSpace(testdataDeps), "\n")...) + sort.Strings(pkgs) + var pkgRoots []string + for _, pkg := range pkgs { + parentFound := false + for _, prev := range pkgRoots { + if strings.HasPrefix(pkg, prev) { + // We will copy in the source for pkg when we copy in prev. + parentFound = true + break + } + } + if !parentFound { + pkgRoots = append(pkgRoots, pkg) + } + } + + gorootDirs := []string{ + "pkg/tool", + "pkg/include", + } + for _, pkg := range pkgRoots { + gorootDirs = append(gorootDirs, filepath.Join("src", pkg)) + } + + for _, dir := range gorootDirs { + if testing.Verbose() { + fmt.Fprintf(os.Stderr, "+ cp -r %s %s\n", filepath.Join(oldGOROOT, dir), filepath.Join(goroot, dir)) + } + if err := overlayDir(filepath.Join(goroot, dir), filepath.Join(oldGOROOT, dir)); err != nil { + return err + } + } + + return nil +} + +// The shared library was built at the expected location. +func TestSOBuilt(t *testing.T) { + _, err := os.Stat(filepath.Join(gorootInstallDir, soname)) + if err != nil { + t.Error(err) + } +} + +func hasDynTag(f *elf.File, tag elf.DynTag) bool { + ds := f.SectionByType(elf.SHT_DYNAMIC) + if ds == nil { + return false + } + d, err := ds.Data() + if err != nil { + return false + } + for len(d) > 0 { + var t elf.DynTag + switch f.Class { + case elf.ELFCLASS32: + t = elf.DynTag(f.ByteOrder.Uint32(d[0:4])) + d = d[8:] + case elf.ELFCLASS64: + t = elf.DynTag(f.ByteOrder.Uint64(d[0:8])) + d = d[16:] + } + if t == tag { + return true + } + } + return false +} + +// The shared library does not have relocations against the text segment. +func TestNoTextrel(t *testing.T) { + sopath := filepath.Join(gorootInstallDir, soname) + f, err := elf.Open(sopath) + if err != nil { + t.Fatal("elf.Open failed: ", err) + } + defer f.Close() + if hasDynTag(f, elf.DT_TEXTREL) { + t.Errorf("%s has DT_TEXTREL set", soname) + } +} + +// The shared library does not contain symbols called ".dup" +// (See golang.org/issue/14841.) +func TestNoDupSymbols(t *testing.T) { + sopath := filepath.Join(gorootInstallDir, soname) + f, err := elf.Open(sopath) + if err != nil { + t.Fatal("elf.Open failed: ", err) + } + defer f.Close() + syms, err := f.Symbols() + if err != nil { + t.Errorf("error reading symbols %v", err) + return + } + for _, s := range syms { + if s.Name == ".dup" { + t.Fatalf("%s contains symbol called .dup", sopath) + } + } +} + +// The install command should have created a "shlibname" file for the +// listed packages (and runtime/cgo, and math on arm) indicating the +// name of the shared library containing it. +func TestShlibnameFiles(t *testing.T) { + pkgs := append([]string{}, minpkgs...) + pkgs = append(pkgs, "runtime/cgo") + if runtime.GOARCH == "arm" { + pkgs = append(pkgs, "math") + } + for _, pkg := range pkgs { + shlibnamefile := filepath.Join(gorootInstallDir, pkg+".shlibname") + contentsb, err := os.ReadFile(shlibnamefile) + if err != nil { + t.Errorf("error reading shlibnamefile for %s: %v", pkg, err) + continue + } + contents := strings.TrimSpace(string(contentsb)) + if contents != soname { + t.Errorf("shlibnamefile for %s has wrong contents: %q", pkg, contents) + } + } +} + +// Is a given offset into the file contained in a loaded segment? +func isOffsetLoaded(f *elf.File, offset uint64) bool { + for _, prog := range f.Progs { + if prog.Type == elf.PT_LOAD { + if prog.Off <= offset && offset < prog.Off+prog.Filesz { + return true + } + } + } + return false +} + +func rnd(v int32, r int32) int32 { + if r <= 0 { + return v + } + v += r - 1 + c := v % r + if c < 0 { + c += r + } + v -= c + return v +} + +func readwithpad(r io.Reader, sz int32) ([]byte, error) { + data := make([]byte, rnd(sz, 4)) + _, err := io.ReadFull(r, data) + if err != nil { + return nil, err + } + data = data[:sz] + return data, nil +} + +type note struct { + name string + tag int32 + desc string + section *elf.Section +} + +// Read all notes from f. As ELF section names are not supposed to be special, one +// looks for a particular note by scanning all SHT_NOTE sections looking for a note +// with a particular "name" and "tag". +func readNotes(f *elf.File) ([]*note, error) { + var notes []*note + for _, sect := range f.Sections { + if sect.Type != elf.SHT_NOTE { + continue + } + r := sect.Open() + for { + var namesize, descsize, tag int32 + err := binary.Read(r, f.ByteOrder, &namesize) + if err != nil { + if err == io.EOF { + break + } + return nil, fmt.Errorf("read namesize failed: %v", err) + } + err = binary.Read(r, f.ByteOrder, &descsize) + if err != nil { + return nil, fmt.Errorf("read descsize failed: %v", err) + } + err = binary.Read(r, f.ByteOrder, &tag) + if err != nil { + return nil, fmt.Errorf("read type failed: %v", err) + } + name, err := readwithpad(r, namesize) + if err != nil { + return nil, fmt.Errorf("read name failed: %v", err) + } + desc, err := readwithpad(r, descsize) + if err != nil { + return nil, fmt.Errorf("read desc failed: %v", err) + } + notes = append(notes, ¬e{name: string(name), tag: tag, desc: string(desc), section: sect}) + } + } + return notes, nil +} + +func dynStrings(t *testing.T, path string, flag elf.DynTag) []string { + t.Helper() + f, err := elf.Open(path) + if err != nil { + t.Fatalf("elf.Open(%q) failed: %v", path, err) + } + defer f.Close() + dynstrings, err := f.DynString(flag) + if err != nil { + t.Fatalf("DynString(%s) failed on %s: %v", flag, path, err) + } + return dynstrings +} + +func AssertIsLinkedToRegexp(t *testing.T, path string, re *regexp.Regexp) { + t.Helper() + for _, dynstring := range dynStrings(t, path, elf.DT_NEEDED) { + if re.MatchString(dynstring) { + return + } + } + t.Errorf("%s is not linked to anything matching %v", path, re) +} + +func AssertIsLinkedTo(t *testing.T, path, lib string) { + t.Helper() + AssertIsLinkedToRegexp(t, path, regexp.MustCompile(regexp.QuoteMeta(lib))) +} + +func AssertHasRPath(t *testing.T, path, dir string) { + t.Helper() + for _, tag := range []elf.DynTag{elf.DT_RPATH, elf.DT_RUNPATH} { + for _, dynstring := range dynStrings(t, path, tag) { + for _, rpath := range strings.Split(dynstring, ":") { + if filepath.Clean(rpath) == filepath.Clean(dir) { + return + } + } + } + } + t.Errorf("%s does not have rpath %s", path, dir) +} + +// Build a trivial program that links against the shared runtime and check it runs. +func TestTrivialExecutable(t *testing.T) { + goCmd(t, "install", "-linkshared", "./trivial") + run(t, "trivial executable", "../../bin/trivial") + AssertIsLinkedTo(t, "../../bin/trivial", soname) + AssertHasRPath(t, "../../bin/trivial", gorootInstallDir) + // It is 19K on linux/amd64, with separate-code in binutils ld and 64k being most common alignment + // 4*64k should be enough, but this might need revision eventually. + checkSize(t, "../../bin/trivial", 256000) +} + +// Build a trivial program in PIE mode that links against the shared runtime and check it runs. +func TestTrivialExecutablePIE(t *testing.T) { + goCmd(t, "build", "-buildmode=pie", "-o", "trivial.pie", "-linkshared", "./trivial") + run(t, "trivial executable", "./trivial.pie") + AssertIsLinkedTo(t, "./trivial.pie", soname) + AssertHasRPath(t, "./trivial.pie", gorootInstallDir) + // It is 19K on linux/amd64, with separate-code in binutils ld and 64k being most common alignment + // 4*64k should be enough, but this might need revision eventually. + checkSize(t, "./trivial.pie", 256000) +} + +// Check that the file size does not exceed a limit. +func checkSize(t *testing.T, f string, limit int64) { + fi, err := os.Stat(f) + if err != nil { + t.Fatalf("stat failed: %v", err) + } + if sz := fi.Size(); sz > limit { + t.Errorf("file too large: got %d, want <= %d", sz, limit) + } +} + +// Build a division test program and check it runs. +func TestDivisionExecutable(t *testing.T) { + goCmd(t, "install", "-linkshared", "./division") + run(t, "division executable", "../../bin/division") +} + +// Build an executable that uses cgo linked against the shared runtime and check it +// runs. +func TestCgoExecutable(t *testing.T) { + goCmd(t, "install", "-linkshared", "./execgo") + run(t, "cgo executable", "../../bin/execgo") +} + +func checkPIE(t *testing.T, name string) { + f, err := elf.Open(name) + if err != nil { + t.Fatal("elf.Open failed: ", err) + } + defer f.Close() + if f.Type != elf.ET_DYN { + t.Errorf("%s has type %v, want ET_DYN", name, f.Type) + } + if hasDynTag(f, elf.DT_TEXTREL) { + t.Errorf("%s has DT_TEXTREL set", name) + } +} + +func TestTrivialPIE(t *testing.T) { + if strings.HasSuffix(os.Getenv("GO_BUILDER_NAME"), "-alpine") { + t.Skip("skipping on alpine until issue #54354 resolved") + } + name := "trivial_pie" + goCmd(t, "build", "-buildmode=pie", "-o="+name, "./trivial") + defer os.Remove(name) + run(t, name, "./"+name) + checkPIE(t, name) +} + +func TestCgoPIE(t *testing.T) { + name := "cgo_pie" + goCmd(t, "build", "-buildmode=pie", "-o="+name, "./execgo") + defer os.Remove(name) + run(t, name, "./"+name) + checkPIE(t, name) +} + +// Build a GOPATH package into a shared library that links against the goroot runtime +// and an executable that links against both. +func TestGopathShlib(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./depBase") + shlib := goCmd(t, "list", "-f", "{{.Shlib}}", "-buildmode=shared", "-linkshared", "./depBase") + AssertIsLinkedTo(t, shlib, soname) + goCmd(t, "install", "-linkshared", "./exe") + AssertIsLinkedTo(t, "../../bin/exe", soname) + AssertIsLinkedTo(t, "../../bin/exe", filepath.Base(shlib)) + AssertHasRPath(t, "../../bin/exe", gorootInstallDir) + AssertHasRPath(t, "../../bin/exe", filepath.Dir(gopathInstallDir)) + // And check it runs. + run(t, "executable linked to GOPATH library", "../../bin/exe") +} + +// The shared library contains a note listing the packages it contains in a section +// that is not mapped into memory. +func testPkgListNote(t *testing.T, f *elf.File, note *note) { + if note.section.Flags != 0 { + t.Errorf("package list section has flags %v, want 0", note.section.Flags) + } + if isOffsetLoaded(f, note.section.Offset) { + t.Errorf("package list section contained in PT_LOAD segment") + } + if note.desc != "testshared/depBase\n" { + t.Errorf("incorrect package list %q, want %q", note.desc, "testshared/depBase\n") + } +} + +// The shared library contains a note containing the ABI hash that is mapped into +// memory and there is a local symbol called go.link.abihashbytes that points 16 +// bytes into it. +func testABIHashNote(t *testing.T, f *elf.File, note *note) { + if note.section.Flags != elf.SHF_ALLOC { + t.Errorf("abi hash section has flags %v, want SHF_ALLOC", note.section.Flags) + } + if !isOffsetLoaded(f, note.section.Offset) { + t.Errorf("abihash section not contained in PT_LOAD segment") + } + var hashbytes elf.Symbol + symbols, err := f.Symbols() + if err != nil { + t.Errorf("error reading symbols %v", err) + return + } + for _, sym := range symbols { + if sym.Name == "go:link.abihashbytes" { + hashbytes = sym + } + } + if hashbytes.Name == "" { + t.Errorf("no symbol called go:link.abihashbytes") + return + } + if elf.ST_BIND(hashbytes.Info) != elf.STB_LOCAL { + t.Errorf("%s has incorrect binding %v, want STB_LOCAL", hashbytes.Name, elf.ST_BIND(hashbytes.Info)) + } + if f.Sections[hashbytes.Section] != note.section { + t.Errorf("%s has incorrect section %v, want %s", hashbytes.Name, f.Sections[hashbytes.Section].Name, note.section.Name) + } + if hashbytes.Value-note.section.Addr != 16 { + t.Errorf("%s has incorrect offset into section %d, want 16", hashbytes.Name, hashbytes.Value-note.section.Addr) + } +} + +// A Go shared library contains a note indicating which other Go shared libraries it +// was linked against in an unmapped section. +func testDepsNote(t *testing.T, f *elf.File, note *note) { + if note.section.Flags != 0 { + t.Errorf("package list section has flags %v, want 0", note.section.Flags) + } + if isOffsetLoaded(f, note.section.Offset) { + t.Errorf("package list section contained in PT_LOAD segment") + } + // libdepBase.so just links against the lib containing the runtime. + if note.desc != soname { + t.Errorf("incorrect dependency list %q, want %q", note.desc, soname) + } +} + +// The shared library contains notes with defined contents; see above. +func TestNotes(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./depBase") + shlib := goCmd(t, "list", "-f", "{{.Shlib}}", "-buildmode=shared", "-linkshared", "./depBase") + f, err := elf.Open(shlib) + if err != nil { + t.Fatal(err) + } + defer f.Close() + notes, err := readNotes(f) + if err != nil { + t.Fatal(err) + } + pkgListNoteFound := false + abiHashNoteFound := false + depsNoteFound := false + for _, note := range notes { + if note.name != "Go\x00\x00" { + continue + } + switch note.tag { + case 1: // ELF_NOTE_GOPKGLIST_TAG + if pkgListNoteFound { + t.Error("multiple package list notes") + } + testPkgListNote(t, f, note) + pkgListNoteFound = true + case 2: // ELF_NOTE_GOABIHASH_TAG + if abiHashNoteFound { + t.Error("multiple abi hash notes") + } + testABIHashNote(t, f, note) + abiHashNoteFound = true + case 3: // ELF_NOTE_GODEPS_TAG + if depsNoteFound { + t.Error("multiple dependency list notes") + } + testDepsNote(t, f, note) + depsNoteFound = true + } + } + if !pkgListNoteFound { + t.Error("package list note not found") + } + if !abiHashNoteFound { + t.Error("abi hash note not found") + } + if !depsNoteFound { + t.Error("deps note not found") + } +} + +// Build a GOPATH package (depBase) into a shared library that links against the goroot +// runtime, another package (dep2) that links against the first, and an +// executable that links against dep2. +func TestTwoGopathShlibs(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./depBase") + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./dep2") + goCmd(t, "install", "-linkshared", "./exe2") + run(t, "executable linked to GOPATH library", "../../bin/exe2") +} + +func TestThreeGopathShlibs(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./depBase") + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./dep2") + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./dep3") + goCmd(t, "install", "-linkshared", "./exe3") + run(t, "executable linked to GOPATH library", "../../bin/exe3") +} + +// If gccgo is not available or not new enough, call t.Skip. +func requireGccgo(t *testing.T) { + t.Helper() + + gccgoName := os.Getenv("GCCGO") + if gccgoName == "" { + gccgoName = "gccgo" + } + gccgoPath, err := exec.LookPath(gccgoName) + if err != nil { + t.Skip("gccgo not found") + } + cmd := exec.Command(gccgoPath, "-dumpversion") + output, err := cmd.CombinedOutput() + if err != nil { + t.Fatalf("%s -dumpversion failed: %v\n%s", gccgoPath, err, output) + } + dot := bytes.Index(output, []byte{'.'}) + if dot > 0 { + output = output[:dot] + } + major, err := strconv.Atoi(string(output)) + if err != nil { + t.Skipf("can't parse gccgo version number %s", output) + } + if major < 5 { + t.Skipf("gccgo too old (%s)", strings.TrimSpace(string(output))) + } + + gomod, err := exec.Command("go", "env", "GOMOD").Output() + if err != nil { + t.Fatalf("go env GOMOD: %v", err) + } + if len(bytes.TrimSpace(gomod)) > 0 { + t.Skipf("gccgo not supported in module mode; see golang.org/issue/30344") + } +} + +// Build a GOPATH package into a shared library with gccgo and an executable that +// links against it. +func TestGoPathShlibGccgo(t *testing.T) { + requireGccgo(t) + + libgoRE := regexp.MustCompile("libgo.so.[0-9]+") + + goCmd(t, "install", "-compiler=gccgo", "-buildmode=shared", "-linkshared", "./depBase") + + // Run 'go list' after 'go install': with gccgo, we apparently don't know the + // shlib location until after we've installed it. + shlib := goCmd(t, "list", "-compiler=gccgo", "-buildmode=shared", "-linkshared", "-f", "{{.Shlib}}", "./depBase") + + AssertIsLinkedToRegexp(t, shlib, libgoRE) + goCmd(t, "install", "-compiler=gccgo", "-linkshared", "./exe") + AssertIsLinkedToRegexp(t, "../../bin/exe", libgoRE) + AssertIsLinkedTo(t, "../../bin/exe", filepath.Base(shlib)) + AssertHasRPath(t, "../../bin/exe", filepath.Dir(shlib)) + // And check it runs. + run(t, "gccgo-built", "../../bin/exe") +} + +// The gccgo version of TestTwoGopathShlibs: build a GOPATH package into a shared +// library with gccgo, another GOPATH package that depends on the first and an +// executable that links the second library. +func TestTwoGopathShlibsGccgo(t *testing.T) { + requireGccgo(t) + + libgoRE := regexp.MustCompile("libgo.so.[0-9]+") + + goCmd(t, "install", "-compiler=gccgo", "-buildmode=shared", "-linkshared", "./depBase") + goCmd(t, "install", "-compiler=gccgo", "-buildmode=shared", "-linkshared", "./dep2") + goCmd(t, "install", "-compiler=gccgo", "-linkshared", "./exe2") + + // Run 'go list' after 'go install': with gccgo, we apparently don't know the + // shlib location until after we've installed it. + dep2 := goCmd(t, "list", "-compiler=gccgo", "-buildmode=shared", "-linkshared", "-f", "{{.Shlib}}", "./dep2") + depBase := goCmd(t, "list", "-compiler=gccgo", "-buildmode=shared", "-linkshared", "-f", "{{.Shlib}}", "./depBase") + + AssertIsLinkedToRegexp(t, depBase, libgoRE) + AssertIsLinkedToRegexp(t, dep2, libgoRE) + AssertIsLinkedTo(t, dep2, filepath.Base(depBase)) + AssertIsLinkedToRegexp(t, "../../bin/exe2", libgoRE) + AssertIsLinkedTo(t, "../../bin/exe2", filepath.Base(dep2)) + AssertIsLinkedTo(t, "../../bin/exe2", filepath.Base(depBase)) + + // And check it runs. + run(t, "gccgo-built", "../../bin/exe2") +} + +// Testing rebuilding of shared libraries when they are stale is a bit more +// complicated that it seems like it should be. First, we make everything "old": but +// only a few seconds old, or it might be older than gc (or the runtime source) and +// everything will get rebuilt. Then define a timestamp slightly newer than this +// time, which is what we set the mtime to of a file to cause it to be seen as new, +// and finally another slightly even newer one that we can compare files against to +// see if they have been rebuilt. +var oldTime = time.Now().Add(-9 * time.Second) +var nearlyNew = time.Now().Add(-6 * time.Second) +var stampTime = time.Now().Add(-3 * time.Second) + +// resetFileStamps makes "everything" (bin, src, pkg from GOPATH and the +// test-specific parts of GOROOT) appear old. +func resetFileStamps() { + chtime := func(path string, info os.FileInfo, err error) error { + return os.Chtimes(path, oldTime, oldTime) + } + reset := func(path string) { + if err := filepath.Walk(path, chtime); err != nil { + log.Panicf("resetFileStamps failed: %v", err) + } + + } + reset("../../bin") + reset("../../pkg") + reset("../../src") + reset(gorootInstallDir) +} + +// touch changes path and returns a function that changes it back. +// It also sets the time of the file, so that we can see if it is rewritten. +func touch(t *testing.T, path string) (cleanup func()) { + t.Helper() + data, err := os.ReadFile(path) + if err != nil { + t.Fatal(err) + } + old := make([]byte, len(data)) + copy(old, data) + if bytes.HasPrefix(data, []byte("!<arch>\n")) { + // Change last digit of build ID. + // (Content ID in the new content-based build IDs.) + const marker = `build id "` + i := bytes.Index(data, []byte(marker)) + if i < 0 { + t.Fatal("cannot find build id in archive") + } + j := bytes.IndexByte(data[i+len(marker):], '"') + if j < 0 { + t.Fatal("cannot find build id in archive") + } + i += len(marker) + j - 1 + if data[i] == 'a' { + data[i] = 'b' + } else { + data[i] = 'a' + } + } else { + // assume it's a text file + data = append(data, '\n') + } + + // If the file is still a symlink from an overlay, delete it so that we will + // replace it with a regular file instead of overwriting the symlinked one. + fi, err := os.Lstat(path) + if err == nil && !fi.Mode().IsRegular() { + fi, err = os.Stat(path) + if err := os.Remove(path); err != nil { + t.Fatal(err) + } + } + if err != nil { + t.Fatal(err) + } + + // If we're replacing a symlink to a read-only file, make the new file + // user-writable. + perm := fi.Mode().Perm() | 0200 + + if err := os.WriteFile(path, data, perm); err != nil { + t.Fatal(err) + } + if err := os.Chtimes(path, nearlyNew, nearlyNew); err != nil { + t.Fatal(err) + } + return func() { + if err := os.WriteFile(path, old, perm); err != nil { + t.Fatal(err) + } + } +} + +// isNew returns if the path is newer than the time stamp used by touch. +func isNew(t *testing.T, path string) bool { + t.Helper() + fi, err := os.Stat(path) + if err != nil { + t.Fatal(err) + } + return fi.ModTime().After(stampTime) +} + +// Fail unless path has been rebuilt (i.e. is newer than the time stamp used by +// isNew) +func AssertRebuilt(t *testing.T, msg, path string) { + t.Helper() + if !isNew(t, path) { + t.Errorf("%s was not rebuilt (%s)", msg, path) + } +} + +// Fail if path has been rebuilt (i.e. is newer than the time stamp used by isNew) +func AssertNotRebuilt(t *testing.T, msg, path string) { + t.Helper() + if isNew(t, path) { + t.Errorf("%s was rebuilt (%s)", msg, path) + } +} + +func TestRebuilding(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./depBase") + goCmd(t, "install", "-linkshared", "./exe") + info := strings.Fields(goCmd(t, "list", "-buildmode=shared", "-linkshared", "-f", "{{.Target}} {{.Shlib}}", "./depBase")) + if len(info) != 2 { + t.Fatalf("go list failed to report Target and/or Shlib") + } + target := info[0] + shlib := info[1] + + // If the source is newer than both the .a file and the .so, both are rebuilt. + t.Run("newsource", func(t *testing.T) { + resetFileStamps() + cleanup := touch(t, "./depBase/dep.go") + defer func() { + cleanup() + goCmd(t, "install", "-linkshared", "./exe") + }() + goCmd(t, "install", "-linkshared", "./exe") + AssertRebuilt(t, "new source", target) + AssertRebuilt(t, "new source", shlib) + }) + + // If the .a file is newer than the .so, the .so is rebuilt (but not the .a) + t.Run("newarchive", func(t *testing.T) { + resetFileStamps() + AssertNotRebuilt(t, "new .a file before build", target) + goCmd(t, "list", "-linkshared", "-f={{.ImportPath}} {{.Stale}} {{.StaleReason}} {{.Target}}", "./depBase") + AssertNotRebuilt(t, "new .a file before build", target) + cleanup := touch(t, target) + defer func() { + cleanup() + goCmd(t, "install", "-v", "-linkshared", "./exe") + }() + goCmd(t, "install", "-v", "-linkshared", "./exe") + AssertNotRebuilt(t, "new .a file", target) + AssertRebuilt(t, "new .a file", shlib) + }) +} + +func appendFile(t *testing.T, path, content string) { + t.Helper() + f, err := os.OpenFile(path, os.O_WRONLY|os.O_APPEND, 0660) + if err != nil { + t.Fatalf("os.OpenFile failed: %v", err) + } + defer func() { + err := f.Close() + if err != nil { + t.Fatalf("f.Close failed: %v", err) + } + }() + _, err = f.WriteString(content) + if err != nil { + t.Fatalf("f.WriteString failed: %v", err) + } +} + +func createFile(t *testing.T, path, content string) { + t.Helper() + f, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_EXCL, 0644) + if err != nil { + t.Fatalf("os.OpenFile failed: %v", err) + } + _, err = f.WriteString(content) + if closeErr := f.Close(); err == nil { + err = closeErr + } + if err != nil { + t.Fatalf("WriteString failed: %v", err) + } +} + +func TestABIChecking(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./depBase") + goCmd(t, "install", "-linkshared", "./exe") + + // If we make an ABI-breaking change to depBase and rebuild libp.so but not exe, + // exe will abort with a complaint on startup. + // This assumes adding an exported function breaks ABI, which is not true in + // some senses but suffices for the narrow definition of ABI compatibility the + // toolchain uses today. + resetFileStamps() + + createFile(t, "./depBase/break.go", "package depBase\nfunc ABIBreak() {}\n") + defer os.Remove("./depBase/break.go") + + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./depBase") + c := exec.Command("../../bin/exe") + output, err := c.CombinedOutput() + if err == nil { + t.Fatal("executing exe did not fail after ABI break") + } + scanner := bufio.NewScanner(bytes.NewReader(output)) + foundMsg := false + const wantPrefix = "abi mismatch detected between the executable and lib" + for scanner.Scan() { + if strings.HasPrefix(scanner.Text(), wantPrefix) { + foundMsg = true + break + } + } + if err = scanner.Err(); err != nil { + t.Errorf("scanner encountered error: %v", err) + } + if !foundMsg { + t.Fatalf("exe failed, but without line %q; got output:\n%s", wantPrefix, output) + } + + // Rebuilding exe makes it work again. + goCmd(t, "install", "-linkshared", "./exe") + run(t, "rebuilt exe", "../../bin/exe") + + // If we make a change which does not break ABI (such as adding an unexported + // function) and rebuild libdepBase.so, exe still works, even if new function + // is in a file by itself. + resetFileStamps() + createFile(t, "./depBase/dep2.go", "package depBase\nfunc noABIBreak() {}\n") + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./depBase") + run(t, "after non-ABI breaking change", "../../bin/exe") +} + +// If a package 'explicit' imports a package 'implicit', building +// 'explicit' into a shared library implicitly includes implicit in +// the shared library. Building an executable that imports both +// explicit and implicit builds the code from implicit into the +// executable rather than fetching it from the shared library. The +// link still succeeds and the executable still runs though. +func TestImplicitInclusion(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./explicit") + goCmd(t, "install", "-linkshared", "./implicitcmd") + run(t, "running executable linked against library that contains same package as it", "../../bin/implicitcmd") +} + +// Tests to make sure that the type fields of empty interfaces and itab +// fields of nonempty interfaces are unique even across modules, +// so that interface equality works correctly. +func TestInterface(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./iface_a") + // Note: iface_i gets installed implicitly as a dependency of iface_a. + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./iface_b") + goCmd(t, "install", "-linkshared", "./iface") + run(t, "running type/itab uniqueness tester", "../../bin/iface") +} + +// Access a global variable from a library. +func TestGlobal(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./globallib") + goCmd(t, "install", "-linkshared", "./global") + run(t, "global executable", "../../bin/global") + AssertIsLinkedTo(t, "../../bin/global", soname) + AssertHasRPath(t, "../../bin/global", gorootInstallDir) +} + +// Run a test using -linkshared of an installed shared package. +// Issue 26400. +func TestTestInstalledShared(t *testing.T) { + goCmd(t, "test", "-linkshared", "-test.short", "sync/atomic") +} + +// Test generated pointer method with -linkshared. +// Issue 25065. +func TestGeneratedMethod(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./issue25065") +} + +// Test use of shared library struct with generated hash function. +// Issue 30768. +func TestGeneratedHash(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./issue30768/issue30768lib") + goCmd(t, "test", "-linkshared", "./issue30768") +} + +// Test that packages can be added not in dependency order (here a depends on b, and a adds +// before b). This could happen with e.g. go build -buildmode=shared std. See issue 39777. +func TestPackageOrder(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./issue39777/a", "./issue39777/b") +} + +// Test that GC data are generated correctly by the linker when it needs a type defined in +// a shared library. See issue 39927. +func TestGCData(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./gcdata/p") + goCmd(t, "build", "-linkshared", "./gcdata/main") + runWithEnv(t, "running gcdata/main", []string{"GODEBUG=clobberfree=1"}, "./main") +} + +// Test that we don't decode type symbols from shared libraries (which has no data, +// causing panic). See issue 44031. +func TestIssue44031(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./issue44031/a") + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./issue44031/b") + goCmd(t, "run", "-linkshared", "./issue44031/main") +} + +// Test that we use a variable from shared libraries (which implement an +// interface in shared libraries.). A weak reference is used in the itab +// in main process. It can cause unreacheble panic. See issue 47873. +func TestIssue47873(t *testing.T) { + goCmd(t, "install", "-buildmode=shared", "-linkshared", "./issue47837/a") + goCmd(t, "run", "-linkshared", "./issue47837/main") +} + +// Test that we can build std in shared mode. +func TestStd(t *testing.T) { + if testing.Short() { + t.Skip("skip in short mode") + } + t.Parallel() + tmpDir := t.TempDir() + // Use a temporary pkgdir to not interfere with other tests, and not write to GOROOT. + // Cannot use goCmd as it runs with cloned GOROOT which is incomplete. + runWithEnv(t, "building std", []string{"GOROOT=" + oldGOROOT}, + filepath.Join(oldGOROOT, "bin", "go"), "install", "-buildmode=shared", "-pkgdir="+tmpDir, "std") + + // Issue #58966. + runWithEnv(t, "testing issue #58966", []string{"GOROOT=" + oldGOROOT}, + filepath.Join(oldGOROOT, "bin", "go"), "run", "-linkshared", "-pkgdir="+tmpDir, "./issue58966/main.go") +} diff --git a/misc/cgo/testshared/testdata/dep2/dep2.go b/misc/cgo/testshared/testdata/dep2/dep2.go new file mode 100644 index 0000000..94f38cf --- /dev/null +++ b/misc/cgo/testshared/testdata/dep2/dep2.go @@ -0,0 +1,15 @@ +package dep2 + +import "testshared/depBase" + +var W int = 1 + +var hasProg depBase.HasProg + +type Dep2 struct { + depBase.Dep +} + +func G() int { + return depBase.F() + 1 +} diff --git a/misc/cgo/testshared/testdata/dep3/dep3.go b/misc/cgo/testshared/testdata/dep3/dep3.go new file mode 100644 index 0000000..6b02ad2 --- /dev/null +++ b/misc/cgo/testshared/testdata/dep3/dep3.go @@ -0,0 +1,22 @@ +package dep3 + +// The point of this test file is that it references a type from +// depBase that is also referenced in dep2, but dep2 is loaded by the +// linker before depBase (because it is earlier in the import list). +// There was a bug in the linker where it would not correctly read out +// the type data in this case and later crash. + +import ( + "testshared/dep2" + "testshared/depBase" +) + +type Dep3 struct { + dep depBase.Dep + dep2 dep2.Dep2 +} + +func D3() int { + var x Dep3 + return x.dep.X + x.dep2.X +} diff --git a/misc/cgo/testshared/testdata/depBase/asm.s b/misc/cgo/testshared/testdata/depBase/asm.s new file mode 100644 index 0000000..0f1111f --- /dev/null +++ b/misc/cgo/testshared/testdata/depBase/asm.s @@ -0,0 +1,10 @@ +// 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. + +// +build gc + +#include "textflag.h" + +TEXT ·ImplementedInAsm(SB),NOSPLIT,$0-0 + RET diff --git a/misc/cgo/testshared/testdata/depBase/dep.go b/misc/cgo/testshared/testdata/depBase/dep.go new file mode 100644 index 0000000..e7cc7c8 --- /dev/null +++ b/misc/cgo/testshared/testdata/depBase/dep.go @@ -0,0 +1,37 @@ +// Copyright 2016 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 depBase + +import ( + "os" + "reflect" +) + +var SlicePtr interface{} = &[]int{} + +var V int = 1 + +var HasMask []string = []string{"hi"} + +type HasProg struct { + array [1024]*byte +} + +type Dep struct { + X int +} + +func (d *Dep) Method() int { + // This code below causes various go.itab.* symbols to be generated in + // the shared library. Similar code in ../exe/exe.go results in + // exercising https://golang.org/issues/17594 + reflect.TypeOf(os.Stdout).Elem() + return 10 +} + +func F() int { + defer func() {}() + return V +} diff --git a/misc/cgo/testshared/testdata/depBase/gccgo.go b/misc/cgo/testshared/testdata/depBase/gccgo.go new file mode 100644 index 0000000..2b02a1e --- /dev/null +++ b/misc/cgo/testshared/testdata/depBase/gccgo.go @@ -0,0 +1,9 @@ +// Copyright 2016 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 gccgo + +package depBase + +func ImplementedInAsm() {} diff --git a/misc/cgo/testshared/testdata/depBase/stubs.go b/misc/cgo/testshared/testdata/depBase/stubs.go new file mode 100644 index 0000000..c779538 --- /dev/null +++ b/misc/cgo/testshared/testdata/depBase/stubs.go @@ -0,0 +1,9 @@ +// Copyright 2016 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 gc + +package depBase + +func ImplementedInAsm() diff --git a/misc/cgo/testshared/testdata/division/division.go b/misc/cgo/testshared/testdata/division/division.go new file mode 100644 index 0000000..bb5fc98 --- /dev/null +++ b/misc/cgo/testshared/testdata/division/division.go @@ -0,0 +1,17 @@ +// 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 main + +//go:noinline +func div(x, y uint32) uint32 { + return x / y +} + +func main() { + a := div(97, 11) + if a != 8 { + panic("FAIL") + } +} diff --git a/misc/cgo/testshared/testdata/exe/exe.go b/misc/cgo/testshared/testdata/exe/exe.go new file mode 100644 index 0000000..ee95f97 --- /dev/null +++ b/misc/cgo/testshared/testdata/exe/exe.go @@ -0,0 +1,45 @@ +package main + +import ( + "os" + "reflect" + "runtime" + + "testshared/depBase" +) + +// Having a function declared in the main package triggered +// golang.org/issue/18250 +func DeclaredInMain() { +} + +type C struct { +} + +func F() *C { + return nil +} + +var slicePtr interface{} = &[]int{} + +func main() { + defer depBase.ImplementedInAsm() + // This code below causes various go.itab.* symbols to be generated in + // the executable. Similar code in ../depBase/dep.go results in + // exercising https://golang.org/issues/17594 + reflect.TypeOf(os.Stdout).Elem() + runtime.GC() + depBase.V = depBase.F() + 1 + + var c *C + if reflect.TypeOf(F).Out(0) != reflect.TypeOf(c) { + panic("bad reflection results, see golang.org/issue/18252") + } + + sp := reflect.New(reflect.TypeOf(slicePtr).Elem()) + s := sp.Interface() + + if reflect.TypeOf(s) != reflect.TypeOf(slicePtr) { + panic("bad reflection results, see golang.org/issue/18729") + } +} diff --git a/misc/cgo/testshared/testdata/exe2/exe2.go b/misc/cgo/testshared/testdata/exe2/exe2.go new file mode 100644 index 0000000..433f331 --- /dev/null +++ b/misc/cgo/testshared/testdata/exe2/exe2.go @@ -0,0 +1,8 @@ +package main + +import "testshared/dep2" + +func main() { + d := &dep2.Dep2{} + dep2.W = dep2.G() + 1 + d.Method() +} diff --git a/misc/cgo/testshared/testdata/exe3/exe3.go b/misc/cgo/testshared/testdata/exe3/exe3.go new file mode 100644 index 0000000..533e3a9 --- /dev/null +++ b/misc/cgo/testshared/testdata/exe3/exe3.go @@ -0,0 +1,7 @@ +package main + +import "testshared/dep3" + +func main() { + dep3.D3() +} diff --git a/misc/cgo/testshared/testdata/execgo/exe.go b/misc/cgo/testshared/testdata/execgo/exe.go new file mode 100644 index 0000000..0427be8 --- /dev/null +++ b/misc/cgo/testshared/testdata/execgo/exe.go @@ -0,0 +1,8 @@ +package main + +/* + */ +import "C" + +func main() { +} diff --git a/misc/cgo/testshared/testdata/explicit/explicit.go b/misc/cgo/testshared/testdata/explicit/explicit.go new file mode 100644 index 0000000..af969fc --- /dev/null +++ b/misc/cgo/testshared/testdata/explicit/explicit.go @@ -0,0 +1,9 @@ +package explicit + +import ( + "testshared/implicit" +) + +func E() int { + return implicit.I() +} diff --git a/misc/cgo/testshared/testdata/gcdata/main/main.go b/misc/cgo/testshared/testdata/gcdata/main/main.go new file mode 100644 index 0000000..394862f --- /dev/null +++ b/misc/cgo/testshared/testdata/gcdata/main/main.go @@ -0,0 +1,37 @@ +// Copyright 2020 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 GC data is generated correctly for global +// variables with types defined in a shared library. +// See issue 39927. + +// This test run under GODEBUG=clobberfree=1. The check +// *x[i] == 12345 depends on this debug mode to clobber +// the value if the object is freed prematurely. + +package main + +import ( + "fmt" + "runtime" + "testshared/gcdata/p" +) + +var x p.T + +func main() { + for i := range x { + x[i] = new(int) + *x[i] = 12345 + } + runtime.GC() + runtime.GC() + runtime.GC() + for i := range x { + if *x[i] != 12345 { + fmt.Printf("x[%d] == %d, want 12345\n", i, *x[i]) + panic("FAIL") + } + } +} diff --git a/misc/cgo/testshared/testdata/gcdata/p/p.go b/misc/cgo/testshared/testdata/gcdata/p/p.go new file mode 100644 index 0000000..1fee754 --- /dev/null +++ b/misc/cgo/testshared/testdata/gcdata/p/p.go @@ -0,0 +1,7 @@ +// Copyright 2020 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 + +type T [10]*int diff --git a/misc/cgo/testshared/testdata/global/main.go b/misc/cgo/testshared/testdata/global/main.go new file mode 100644 index 0000000..f43e7c3 --- /dev/null +++ b/misc/cgo/testshared/testdata/global/main.go @@ -0,0 +1,71 @@ +// 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 main + +import ( + "testshared/globallib" +) + +//go:noinline +func testLoop() { + for i, s := range globallib.Data { + if s != int64(i) { + panic("testLoop: mismatch") + } + } +} + +//go:noinline +func ptrData() *[1<<20 + 10]int64 { + return &globallib.Data +} + +//go:noinline +func testMediumOffset() { + for i, s := range globallib.Data[1<<16-2:] { + if s != int64(i)+1<<16-2 { + panic("testMediumOffset: index mismatch") + } + } + + x := globallib.Data[1<<16-1] + if x != 1<<16-1 { + panic("testMediumOffset: direct mismatch") + } + + y := &globallib.Data[1<<16-3] + if y != &ptrData()[1<<16-3] { + panic("testMediumOffset: address mismatch") + } +} + +//go:noinline +func testLargeOffset() { + for i, s := range globallib.Data[1<<20:] { + if s != int64(i)+1<<20 { + panic("testLargeOffset: index mismatch") + } + } + + x := globallib.Data[1<<20+1] + if x != 1<<20+1 { + panic("testLargeOffset: direct mismatch") + } + + y := &globallib.Data[1<<20+2] + if y != &ptrData()[1<<20+2] { + panic("testLargeOffset: address mismatch") + } +} + +func main() { + testLoop() + + // SSA rules commonly merge offsets into addresses. These + // tests access global data in different ways to try + // and exercise different SSA rules. + testMediumOffset() + testLargeOffset() +} diff --git a/misc/cgo/testshared/testdata/globallib/global.go b/misc/cgo/testshared/testdata/globallib/global.go new file mode 100644 index 0000000..b4372a2 --- /dev/null +++ b/misc/cgo/testshared/testdata/globallib/global.go @@ -0,0 +1,17 @@ +// 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 globallib + +// Data is large enough to that offsets into it do not fit into +// 16-bit or 20-bit immediates. Ideally we'd also try and overrun +// 32-bit immediates, but that requires the test machine to have +// too much memory. +var Data [1<<20 + 10]int64 + +func init() { + for i := range Data { + Data[i] = int64(i) + } +} diff --git a/misc/cgo/testshared/testdata/iface/main.go b/misc/cgo/testshared/testdata/iface/main.go new file mode 100644 index 0000000..d26ebbc --- /dev/null +++ b/misc/cgo/testshared/testdata/iface/main.go @@ -0,0 +1,17 @@ +// 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 main + +import "testshared/iface_a" +import "testshared/iface_b" + +func main() { + if iface_a.F() != iface_b.F() { + panic("empty interfaces not equal") + } + if iface_a.G() != iface_b.G() { + panic("non-empty interfaces not equal") + } +} diff --git a/misc/cgo/testshared/testdata/iface_a/a.go b/misc/cgo/testshared/testdata/iface_a/a.go new file mode 100644 index 0000000..e2cef1e --- /dev/null +++ b/misc/cgo/testshared/testdata/iface_a/a.go @@ -0,0 +1,17 @@ +// 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 iface_a + +import "testshared/iface_i" + +//go:noinline +func F() interface{} { + return (*iface_i.T)(nil) +} + +//go:noinline +func G() iface_i.I { + return (*iface_i.T)(nil) +} diff --git a/misc/cgo/testshared/testdata/iface_b/b.go b/misc/cgo/testshared/testdata/iface_b/b.go new file mode 100644 index 0000000..dd3e027 --- /dev/null +++ b/misc/cgo/testshared/testdata/iface_b/b.go @@ -0,0 +1,17 @@ +// 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 iface_b + +import "testshared/iface_i" + +//go:noinline +func F() interface{} { + return (*iface_i.T)(nil) +} + +//go:noinline +func G() iface_i.I { + return (*iface_i.T)(nil) +} diff --git a/misc/cgo/testshared/testdata/iface_i/i.go b/misc/cgo/testshared/testdata/iface_i/i.go new file mode 100644 index 0000000..31c8038 --- /dev/null +++ b/misc/cgo/testshared/testdata/iface_i/i.go @@ -0,0 +1,17 @@ +// 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 iface_i + +type I interface { + M() +} + +type T struct { +} + +func (t *T) M() { +} + +// *T implements I diff --git a/misc/cgo/testshared/testdata/implicit/implicit.go b/misc/cgo/testshared/testdata/implicit/implicit.go new file mode 100644 index 0000000..5360188 --- /dev/null +++ b/misc/cgo/testshared/testdata/implicit/implicit.go @@ -0,0 +1,5 @@ +package implicit + +func I() int { + return 42 +} diff --git a/misc/cgo/testshared/testdata/implicitcmd/implicitcmd.go b/misc/cgo/testshared/testdata/implicitcmd/implicitcmd.go new file mode 100644 index 0000000..4d42967 --- /dev/null +++ b/misc/cgo/testshared/testdata/implicitcmd/implicitcmd.go @@ -0,0 +1,10 @@ +package main + +import ( + "testshared/explicit" + "testshared/implicit" +) + +func main() { + println(implicit.I() + explicit.E()) +} diff --git a/misc/cgo/testshared/testdata/issue25065/a.go b/misc/cgo/testshared/testdata/issue25065/a.go new file mode 100644 index 0000000..979350f --- /dev/null +++ b/misc/cgo/testshared/testdata/issue25065/a.go @@ -0,0 +1,20 @@ +// 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 issue25065 has a type with a method that is +// 1) referenced in a method expression +// 2) not called +// 3) not converted to an interface +// 4) is a value method but the reference is to the pointer method +// These cases avoid the call to makefuncsym from typecheckfunc, but we +// still need to call makefuncsym somehow or the symbol will not be defined. +package issue25065 + +type T int + +func (t T) M() {} + +func F() func(*T) { + return (*T).M +} diff --git a/misc/cgo/testshared/testdata/issue30768/issue30768lib/lib.go b/misc/cgo/testshared/testdata/issue30768/issue30768lib/lib.go new file mode 100644 index 0000000..9e45ebe --- /dev/null +++ b/misc/cgo/testshared/testdata/issue30768/issue30768lib/lib.go @@ -0,0 +1,11 @@ +// 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 issue30768lib + +// S is a struct that requires a generated hash function. +type S struct { + A string + B int +} diff --git a/misc/cgo/testshared/testdata/issue30768/x_test.go b/misc/cgo/testshared/testdata/issue30768/x_test.go new file mode 100644 index 0000000..1bbd139 --- /dev/null +++ b/misc/cgo/testshared/testdata/issue30768/x_test.go @@ -0,0 +1,22 @@ +// 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 issue30768_test + +import ( + "testing" + + "testshared/issue30768/issue30768lib" +) + +type s struct { + s issue30768lib.S +} + +func Test30768(t *testing.T) { + // Calling t.Log will convert S to an empty interface, + // which will force a reference to the generated hash function, + // defined in the shared library. + t.Log(s{}) +} diff --git a/misc/cgo/testshared/testdata/issue39777/a/a.go b/misc/cgo/testshared/testdata/issue39777/a/a.go new file mode 100644 index 0000000..c7bf835 --- /dev/null +++ b/misc/cgo/testshared/testdata/issue39777/a/a.go @@ -0,0 +1,9 @@ +// Copyright 2020 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 a + +import "testshared/issue39777/b" + +func F() { b.F() } diff --git a/misc/cgo/testshared/testdata/issue39777/b/b.go b/misc/cgo/testshared/testdata/issue39777/b/b.go new file mode 100644 index 0000000..4e68196 --- /dev/null +++ b/misc/cgo/testshared/testdata/issue39777/b/b.go @@ -0,0 +1,7 @@ +// Copyright 2020 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 b + +func F() {} diff --git a/misc/cgo/testshared/testdata/issue44031/a/a.go b/misc/cgo/testshared/testdata/issue44031/a/a.go new file mode 100644 index 0000000..48827e6 --- /dev/null +++ b/misc/cgo/testshared/testdata/issue44031/a/a.go @@ -0,0 +1,9 @@ +// Copyright 2021 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 a + +type ATypeWithALoooooongName interface { // a long name, so the type descriptor symbol name is mangled + M() +} diff --git a/misc/cgo/testshared/testdata/issue44031/b/b.go b/misc/cgo/testshared/testdata/issue44031/b/b.go new file mode 100644 index 0000000..ad3ebec --- /dev/null +++ b/misc/cgo/testshared/testdata/issue44031/b/b.go @@ -0,0 +1,17 @@ +// Copyright 2021 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 b + +import "testshared/issue44031/a" + +type T int + +func (T) M() {} + +var i = a.ATypeWithALoooooongName(T(0)) + +func F() { + i.M() +} diff --git a/misc/cgo/testshared/testdata/issue44031/main/main.go b/misc/cgo/testshared/testdata/issue44031/main/main.go new file mode 100644 index 0000000..47f2e3a --- /dev/null +++ b/misc/cgo/testshared/testdata/issue44031/main/main.go @@ -0,0 +1,20 @@ +// Copyright 2021 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 "testshared/issue44031/b" + +type t int + +func (t) m() {} + +type i interface{ m() } // test that unexported method is correctly marked + +var v interface{} = t(0) + +func main() { + b.F() + v.(i).m() +} diff --git a/misc/cgo/testshared/testdata/issue47837/a/a.go b/misc/cgo/testshared/testdata/issue47837/a/a.go new file mode 100644 index 0000000..68588ed --- /dev/null +++ b/misc/cgo/testshared/testdata/issue47837/a/a.go @@ -0,0 +1,19 @@ +// Copyright 2021 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 a + +type A interface { + M() +} + +//go:noinline +func TheFuncWithArgA(a A) { + a.M() +} + +type ImplA struct{} + +//go:noinline +func (A *ImplA) M() {} diff --git a/misc/cgo/testshared/testdata/issue47837/main/main.go b/misc/cgo/testshared/testdata/issue47837/main/main.go new file mode 100644 index 0000000..77c6f34 --- /dev/null +++ b/misc/cgo/testshared/testdata/issue47837/main/main.go @@ -0,0 +1,14 @@ +// Copyright 2021 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 ( + "testshared/issue47837/a" +) + +func main() { + var vara a.ImplA + a.TheFuncWithArgA(&vara) +} diff --git a/misc/cgo/testshared/testdata/issue58966/main.go b/misc/cgo/testshared/testdata/issue58966/main.go new file mode 100644 index 0000000..2d923c3 --- /dev/null +++ b/misc/cgo/testshared/testdata/issue58966/main.go @@ -0,0 +1,15 @@ +// Copyright 2023 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 "crypto/elliptic" + +var curve elliptic.Curve + +func main() { + switch curve { + case elliptic.P224(): + } +} diff --git a/misc/cgo/testshared/testdata/trivial/trivial.go b/misc/cgo/testshared/testdata/trivial/trivial.go new file mode 100644 index 0000000..6ade47c --- /dev/null +++ b/misc/cgo/testshared/testdata/trivial/trivial.go @@ -0,0 +1,9 @@ +package main + +func main() { + // This is enough to make sure that the executable references + // a type descriptor, which was the cause of + // https://golang.org/issue/25970. + c := make(chan int) + _ = c +} |