mirror of
https://github.com/golang/go
synced 2024-11-23 16:10:05 -07:00
d92a3606f5
This permits people to use -buildmode=c-archive to produce an archive file that can be included in a PIE or shared library. Change-Id: Ie340ee2f08bcff4f6fd1415f7d96d51ee3a7c9a1 Reviewed-on: https://go-review.googlesource.com/24180 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: David Crawshaw <crawshaw@golang.org>
564 lines
13 KiB
Go
564 lines
13 KiB
Go
// Copyright 2016 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package carchive_test
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import (
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"bufio"
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"debug/elf"
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"path/filepath"
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"strings"
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"syscall"
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"testing"
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"time"
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"unicode"
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)
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// Program to run.
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var bin []string
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// C compiler with args (from $(go env CC) $(go env GOGCCFLAGS)).
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var cc []string
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// An environment with GOPATH=$(pwd).
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var gopathEnv []string
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// ".exe" on Windows.
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var exeSuffix string
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var GOOS, GOARCH string
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var libgodir string
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func init() {
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bin = []string{"./testp"}
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GOOS = goEnv("GOOS")
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GOARCH = goEnv("GOARCH")
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execScript := "go_" + GOOS + "_" + GOARCH + "_exec"
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if executor, err := exec.LookPath(execScript); err == nil {
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bin = []string{executor, "./testp"}
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}
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ccOut := goEnv("CC")
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cc = []string{string(ccOut)}
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out := goEnv("GOGCCFLAGS")
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quote := '\000'
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start := 0
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lastSpace := true
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backslash := false
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s := string(out)
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for i, c := range s {
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if quote == '\000' && unicode.IsSpace(c) {
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if !lastSpace {
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cc = append(cc, s[start:i])
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lastSpace = true
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}
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} else {
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if lastSpace {
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start = i
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lastSpace = false
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}
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if quote == '\000' && !backslash && (c == '"' || c == '\'') {
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quote = c
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backslash = false
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} else if !backslash && quote == c {
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quote = '\000'
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} else if (quote == '\000' || quote == '"') && !backslash && c == '\\' {
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backslash = true
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} else {
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backslash = false
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}
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}
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}
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if !lastSpace {
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cc = append(cc, s[start:])
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}
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if GOOS == "darwin" {
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// For Darwin/ARM.
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// TODO(crawshaw): can we do better?
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cc = append(cc, []string{"-framework", "CoreFoundation", "-framework", "Foundation"}...)
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}
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libgodir = GOOS + "_" + GOARCH
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switch GOOS {
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case "darwin":
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if GOARCH == "arm" || GOARCH == "arm64" {
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libgodir += "_shared"
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}
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case "dragonfly", "freebsd", "linux", "netbsd", "openbsd", "solaris":
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libgodir += "_shared"
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}
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cc = append(cc, "-I", filepath.Join("pkg", libgodir))
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// Build an environment with GOPATH=$(pwd)
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env := os.Environ()
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var n []string
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for _, e := range env {
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if !strings.HasPrefix(e, "GOPATH=") {
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n = append(n, e)
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}
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}
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dir, err := os.Getwd()
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(2)
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}
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n = append(n, "GOPATH="+dir)
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gopathEnv = n
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if GOOS == "windows" {
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exeSuffix = ".exe"
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}
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}
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func goEnv(key string) string {
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out, err := exec.Command("go", "env", key).Output()
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if err != nil {
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fmt.Fprintf(os.Stderr, "go env %s failed:\n%s", key, err)
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fmt.Fprintf(os.Stderr, "%s", err.(*exec.ExitError).Stderr)
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os.Exit(2)
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}
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return strings.TrimSpace(string(out))
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}
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func compilemain(t *testing.T, libgo string) {
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ccArgs := append(cc, "-o", "testp"+exeSuffix, "main.c")
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if GOOS == "windows" {
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ccArgs = append(ccArgs, "main_windows.c", libgo, "-lntdll", "-lws2_32", "-lwinmm")
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} else {
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ccArgs = append(ccArgs, "main_unix.c", libgo)
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}
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t.Log(ccArgs)
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if out, err := exec.Command(ccArgs[0], ccArgs[1:]...).CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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}
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func TestInstall(t *testing.T) {
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defer func() {
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os.Remove("libgo.a")
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os.Remove("libgo.h")
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os.Remove("testp")
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os.RemoveAll("pkg")
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}()
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cmd := exec.Command("go", "install", "-buildmode=c-archive", "libgo")
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cmd.Env = gopathEnv
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if out, err := cmd.CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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compilemain(t, filepath.Join("pkg", libgodir, "libgo.a"))
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binArgs := append(bin, "arg1", "arg2")
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if out, err := exec.Command(binArgs[0], binArgs[1:]...).CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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os.Remove("libgo.a")
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os.Remove("libgo.h")
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os.Remove("testp")
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// Test building libgo other than installing it.
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// Header files are now present.
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cmd = exec.Command("go", "build", "-buildmode=c-archive", filepath.Join("src", "libgo", "libgo.go"))
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cmd.Env = gopathEnv
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if out, err := cmd.CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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compilemain(t, "libgo.a")
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if out, err := exec.Command(binArgs[0], binArgs[1:]...).CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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os.Remove("libgo.a")
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os.Remove("libgo.h")
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os.Remove("testp")
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cmd = exec.Command("go", "build", "-buildmode=c-archive", "-o", "libgo.a", "libgo")
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cmd.Env = gopathEnv
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if out, err := cmd.CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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compilemain(t, "libgo.a")
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if out, err := exec.Command(binArgs[0], binArgs[1:]...).CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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}
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func TestEarlySignalHandler(t *testing.T) {
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switch GOOS {
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case "darwin":
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switch GOARCH {
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case "arm", "arm64":
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t.Skipf("skipping on %s/%s; see https://golang.org/issue/13701", GOOS, GOARCH)
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}
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case "windows":
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t.Skip("skipping signal test on Windows")
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}
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defer func() {
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os.Remove("libgo2.a")
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os.Remove("libgo2.h")
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os.Remove("testp")
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os.RemoveAll("pkg")
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}()
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cmd := exec.Command("go", "build", "-buildmode=c-archive", "-o", "libgo2.a", "libgo2")
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cmd.Env = gopathEnv
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if out, err := cmd.CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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ccArgs := append(cc, "-o", "testp"+exeSuffix, "main2.c", "libgo2.a")
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if out, err := exec.Command(ccArgs[0], ccArgs[1:]...).CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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if out, err := exec.Command(bin[0], bin[1:]...).CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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}
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func TestSignalForwarding(t *testing.T) {
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switch GOOS {
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case "darwin":
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switch GOARCH {
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case "arm", "arm64":
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t.Skipf("skipping on %s/%s; see https://golang.org/issue/13701", GOOS, GOARCH)
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}
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case "windows":
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t.Skip("skipping signal test on Windows")
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}
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defer func() {
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os.Remove("libgo2.a")
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os.Remove("libgo2.h")
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os.Remove("testp")
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os.RemoveAll("pkg")
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}()
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cmd := exec.Command("go", "build", "-buildmode=c-archive", "-o", "libgo2.a", "libgo2")
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cmd.Env = gopathEnv
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if out, err := cmd.CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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ccArgs := append(cc, "-o", "testp"+exeSuffix, "main5.c", "libgo2.a")
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if out, err := exec.Command(ccArgs[0], ccArgs[1:]...).CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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cmd = exec.Command(bin[0], append(bin[1:], "1")...)
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out, err := cmd.CombinedOutput()
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if err == nil {
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t.Logf("%s", out)
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t.Error("test program succeeded unexpectedly")
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} else if ee, ok := err.(*exec.ExitError); !ok {
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t.Logf("%s", out)
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t.Errorf("error (%v) has type %T; expected exec.ExitError", err, err)
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} else if ws, ok := ee.Sys().(syscall.WaitStatus); !ok {
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t.Logf("%s", out)
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t.Errorf("error.Sys (%v) has type %T; expected syscall.WaitStatus", ee.Sys(), ee.Sys())
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} else if !ws.Signaled() || ws.Signal() != syscall.SIGSEGV {
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t.Logf("%s", out)
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t.Errorf("got %v; expected SIGSEGV", ee)
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}
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}
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func TestSignalForwardingExternal(t *testing.T) {
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switch GOOS {
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case "darwin":
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switch GOARCH {
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case "arm", "arm64":
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t.Skipf("skipping on %s/%s; see https://golang.org/issue/13701", GOOS, GOARCH)
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}
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case "windows":
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t.Skip("skipping signal test on Windows")
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}
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defer func() {
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os.Remove("libgo2.a")
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os.Remove("libgo2.h")
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os.Remove("testp")
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os.RemoveAll("pkg")
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}()
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cmd := exec.Command("go", "build", "-buildmode=c-archive", "-o", "libgo2.a", "libgo2")
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cmd.Env = gopathEnv
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if out, err := cmd.CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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ccArgs := append(cc, "-o", "testp"+exeSuffix, "main5.c", "libgo2.a")
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if out, err := exec.Command(ccArgs[0], ccArgs[1:]...).CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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// We want to send the process a signal and see if it dies.
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// Normally the signal goes to the C thread, the Go signal
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// handler picks it up, sees that it is running in a C thread,
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// and the program dies. Unfortunately, occasionally the
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// signal is delivered to a Go thread, which winds up
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// discarding it because it was sent by another program and
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// there is no Go handler for it. To avoid this, run the
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// program several times in the hopes that it will eventually
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// fail.
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const tries = 20
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for i := 0; i < tries; i++ {
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cmd = exec.Command(bin[0], append(bin[1:], "2")...)
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stderr, err := cmd.StderrPipe()
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if err != nil {
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t.Fatal(err)
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}
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defer stderr.Close()
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r := bufio.NewReader(stderr)
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err = cmd.Start()
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if err != nil {
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t.Fatal(err)
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}
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// Wait for trigger to ensure that the process is started.
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ok, err := r.ReadString('\n')
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// Verify trigger.
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if err != nil || ok != "OK\n" {
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t.Fatalf("Did not receive OK signal")
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}
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// Give the program a chance to enter the sleep function.
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time.Sleep(time.Millisecond)
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cmd.Process.Signal(syscall.SIGSEGV)
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err = cmd.Wait()
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if err == nil {
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continue
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}
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if ee, ok := err.(*exec.ExitError); !ok {
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t.Errorf("error (%v) has type %T; expected exec.ExitError", err, err)
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} else if ws, ok := ee.Sys().(syscall.WaitStatus); !ok {
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t.Errorf("error.Sys (%v) has type %T; expected syscall.WaitStatus", ee.Sys(), ee.Sys())
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} else if !ws.Signaled() || ws.Signal() != syscall.SIGSEGV {
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t.Errorf("got %v; expected SIGSEGV", ee)
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} else {
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// We got the error we expected.
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return
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}
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}
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t.Errorf("program succeeded unexpectedly %d times", tries)
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}
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func TestOsSignal(t *testing.T) {
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switch GOOS {
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case "windows":
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t.Skip("skipping signal test on Windows")
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}
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defer func() {
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os.Remove("libgo3.a")
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os.Remove("libgo3.h")
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os.Remove("testp")
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os.RemoveAll("pkg")
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}()
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cmd := exec.Command("go", "build", "-buildmode=c-archive", "-o", "libgo3.a", "libgo3")
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cmd.Env = gopathEnv
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if out, err := cmd.CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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ccArgs := append(cc, "-o", "testp"+exeSuffix, "main3.c", "libgo3.a")
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if out, err := exec.Command(ccArgs[0], ccArgs[1:]...).CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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if out, err := exec.Command(bin[0], bin[1:]...).CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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}
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func TestSigaltstack(t *testing.T) {
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switch GOOS {
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case "windows":
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t.Skip("skipping signal test on Windows")
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}
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defer func() {
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os.Remove("libgo4.a")
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os.Remove("libgo4.h")
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os.Remove("testp")
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os.RemoveAll("pkg")
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}()
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cmd := exec.Command("go", "build", "-buildmode=c-archive", "-o", "libgo4.a", "libgo4")
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cmd.Env = gopathEnv
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if out, err := cmd.CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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ccArgs := append(cc, "-o", "testp"+exeSuffix, "main4.c", "libgo4.a")
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if out, err := exec.Command(ccArgs[0], ccArgs[1:]...).CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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if out, err := exec.Command(bin[0], bin[1:]...).CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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}
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const testar = `#!/usr/bin/env bash
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while expr $1 : '[-]' >/dev/null; do
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shift
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done
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echo "testar" > $1
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echo "testar" > PWD/testar.ran
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`
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func TestExtar(t *testing.T) {
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switch GOOS {
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case "windows":
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t.Skip("skipping signal test on Windows")
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}
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defer func() {
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os.Remove("libgo4.a")
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os.Remove("libgo4.h")
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os.Remove("testar")
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os.Remove("testar.ran")
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os.RemoveAll("pkg")
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}()
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os.Remove("testar")
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dir, err := os.Getwd()
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if err != nil {
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t.Fatal(err)
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}
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s := strings.Replace(testar, "PWD", dir, 1)
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if err := ioutil.WriteFile("testar", []byte(s), 0777); err != nil {
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t.Fatal(err)
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}
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cmd := exec.Command("go", "build", "-buildmode=c-archive", "-ldflags=-extar="+filepath.Join(dir, "testar"), "-o", "libgo4.a", "libgo4")
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cmd.Env = gopathEnv
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if out, err := cmd.CombinedOutput(); err != nil {
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t.Logf("%s", out)
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t.Fatal(err)
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}
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if _, err := os.Stat("testar.ran"); err != nil {
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if os.IsNotExist(err) {
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t.Error("testar does not exist after go build")
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} else {
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t.Errorf("error checking testar: %v", err)
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}
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}
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}
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func TestPIE(t *testing.T) {
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switch GOOS {
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case "windows", "darwin", "plan9":
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t.Skipf("skipping PIE test on %s", GOOS)
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}
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defer func() {
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os.Remove("testp" + exeSuffix)
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os.RemoveAll("pkg")
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}()
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|
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cmd := exec.Command("go", "install", "-buildmode=c-archive", "libgo")
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cmd.Env = gopathEnv
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if out, err := cmd.CombinedOutput(); err != nil {
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t.Logf("%s", out)
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|
t.Fatal(err)
|
|
}
|
|
|
|
ccArgs := append(cc, "-fPIE", "-pie", "-o", "testp"+exeSuffix, "main.c", "main_unix.c", filepath.Join("pkg", libgodir, "libgo.a"))
|
|
if out, err := exec.Command(ccArgs[0], ccArgs[1:]...).CombinedOutput(); err != nil {
|
|
t.Logf("%s", out)
|
|
t.Fatal(err)
|
|
}
|
|
|
|
binArgs := append(bin, "arg1", "arg2")
|
|
if out, err := exec.Command(binArgs[0], binArgs[1:]...).CombinedOutput(); err != nil {
|
|
t.Logf("%s", out)
|
|
t.Fatal(err)
|
|
}
|
|
|
|
f, err := elf.Open("testp" + exeSuffix)
|
|
if err != nil {
|
|
t.Fatal("elf.Open failed: ", err)
|
|
}
|
|
defer f.Close()
|
|
if hasDynTag(t, f, elf.DT_TEXTREL) {
|
|
t.Errorf("%s has DT_TEXTREL flag", "testp"+exeSuffix)
|
|
}
|
|
}
|
|
|
|
func hasDynTag(t *testing.T, f *elf.File, tag elf.DynTag) bool {
|
|
ds := f.SectionByType(elf.SHT_DYNAMIC)
|
|
if ds == nil {
|
|
t.Error("no SHT_DYNAMIC section")
|
|
return false
|
|
}
|
|
d, err := ds.Data()
|
|
if err != nil {
|
|
t.Errorf("can't read SHT_DYNAMIC contents: %v", err)
|
|
return false
|
|
}
|
|
for len(d) > 0 {
|
|
var t elf.DynTag
|
|
switch f.Class {
|
|
case elf.ELFCLASS32:
|
|
t = elf.DynTag(f.ByteOrder.Uint32(d[:4]))
|
|
d = d[8:]
|
|
case elf.ELFCLASS64:
|
|
t = elf.DynTag(f.ByteOrder.Uint64(d[:8]))
|
|
d = d[16:]
|
|
}
|
|
if t == tag {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|