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![Ian Lance Taylor](/assets/img/avatar_default.png)
Change the run.go driver to recognize the "gc" build tag. Change existing tests to use the "gc" build tag if they use some feature that seems specific to the gc compiler, such as passing specific options to or expecting specific behavior from "go tool compile". Change tests to use the "!gccgo" build tag if they use "go build" or "go run", as while those might work with compilers other than gc, they won't work with the way that gccgo runs its testsuite (which happens independently of the go command). For #43252 Change-Id: I666e04b6d7255a77dfc256ee304094e3a6bb15ad Reviewed-on: https://go-review.googlesource.com/c/go/+/279052 Trust: Ian Lance Taylor <iant@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
156 lines
3.2 KiB
Go
156 lines
3.2 KiB
Go
// +build !nacl,!js,gc
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// run
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// 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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// Test the compiler -linkobj flag.
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package main
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import (
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"fmt"
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"io/ioutil"
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"log"
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"os"
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"os/exec"
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"strings"
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)
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var pwd, tmpdir string
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func main() {
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dir, err := ioutil.TempDir("", "go-test-linkobj-")
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if err != nil {
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log.Fatal(err)
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}
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pwd, err = os.Getwd()
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if err != nil {
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log.Fatal(err)
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}
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if err := os.Chdir(dir); err != nil {
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os.RemoveAll(dir)
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log.Fatal(err)
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}
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tmpdir = dir
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writeFile("p1.go", `
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package p1
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func F() {
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println("hello from p1")
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}
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`)
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writeFile("p2.go", `
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package p2
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import "./p1"
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func F() {
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p1.F()
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println("hello from p2")
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}
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func main() {}
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`)
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writeFile("p3.go", `
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package main
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import "./p2"
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func main() {
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p2.F()
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println("hello from main")
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}
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`)
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// two rounds: once using normal objects, again using .a files (compile -pack).
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for round := 0; round < 2; round++ {
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pkg := "-pack=" + fmt.Sprint(round)
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// The compiler expects the files being read to have the right suffix.
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o := "o"
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if round == 1 {
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o = "a"
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}
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// inlining is disabled to make sure that the link objects contain needed code.
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run("go", "tool", "compile", pkg, "-D", ".", "-I", ".", "-l", "-o", "p1."+o, "-linkobj", "p1.lo", "p1.go")
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run("go", "tool", "compile", pkg, "-D", ".", "-I", ".", "-l", "-o", "p2."+o, "-linkobj", "p2.lo", "p2.go")
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run("go", "tool", "compile", pkg, "-D", ".", "-I", ".", "-l", "-o", "p3."+o, "-linkobj", "p3.lo", "p3.go")
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cp("p1."+o, "p1.oo")
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cp("p2."+o, "p2.oo")
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cp("p3."+o, "p3.oo")
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cp("p1.lo", "p1."+o)
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cp("p2.lo", "p2."+o)
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cp("p3.lo", "p3."+o)
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out := runFail("go", "tool", "link", "p2."+o)
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if !strings.Contains(out, "not package main") {
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fatalf("link p2.o failed but not for package main:\n%s", out)
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}
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run("go", "tool", "link", "-L", ".", "-o", "a.out.exe", "p3."+o)
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out = run("./a.out.exe")
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if !strings.Contains(out, "hello from p1\nhello from p2\nhello from main\n") {
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fatalf("running main, incorrect output:\n%s", out)
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}
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// ensure that mistaken future round can't use these
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os.Remove("p1.o")
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os.Remove("a.out.exe")
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}
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cleanup()
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}
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func run(args ...string) string {
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out, err := exec.Command(args[0], args[1:]...).CombinedOutput()
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if err != nil {
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fatalf("run %v: %s\n%s", args, err, out)
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}
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return string(out)
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}
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func runFail(args ...string) string {
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out, err := exec.Command(args[0], args[1:]...).CombinedOutput()
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if err == nil {
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fatalf("runFail %v: unexpected success!\n%s", args, err, out)
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}
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return string(out)
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}
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func cp(src, dst string) {
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data, err := ioutil.ReadFile(src)
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if err != nil {
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fatalf("%v", err)
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}
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err = ioutil.WriteFile(dst, data, 0666)
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if err != nil {
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fatalf("%v", err)
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}
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}
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func writeFile(name, data string) {
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err := ioutil.WriteFile(name, []byte(data), 0666)
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if err != nil {
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fatalf("%v", err)
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}
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}
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func cleanup() {
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const debug = false
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if debug {
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println("TMPDIR:", tmpdir)
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return
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}
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os.Chdir(pwd) // get out of tmpdir before removing it
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os.RemoveAll(tmpdir)
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}
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func fatalf(format string, args ...interface{}) {
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cleanup()
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log.Fatalf(format, args...)
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}
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