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f8c659b62f
For #45557 Change-Id: I56824135d86452603dd4ed4bab0e24c201bb0683 Reviewed-on: https://go-review.googlesource.com/c/go/+/426257 Run-TryBot: Ian Lance Taylor <iant@google.com> Auto-Submit: Ian Lance Taylor <iant@google.com> Run-TryBot: Andy Pan <panjf2000@gmail.com> Reviewed-by: Cherry Mui <cherryyz@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@google.com>
115 lines
2.6 KiB
Go
115 lines
2.6 KiB
Go
// Copyright 2015 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 test
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import (
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"bytes"
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"internal/testenv"
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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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"testing"
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)
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// Make sure "hello world" does not link in all the
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// fmt.scanf routines. See issue 6853.
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func TestScanfRemoval(t *testing.T) {
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testenv.MustHaveGoBuild(t)
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t.Parallel()
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// Make a directory to work in.
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dir, err := os.MkdirTemp("", "issue6853a-")
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if err != nil {
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t.Fatalf("could not create directory: %v", err)
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}
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defer os.RemoveAll(dir)
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// Create source.
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src := filepath.Join(dir, "test.go")
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f, err := os.Create(src)
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if err != nil {
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t.Fatalf("could not create source file: %v", err)
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}
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f.Write([]byte(`
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package main
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import "fmt"
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func main() {
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fmt.Println("hello world")
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}
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`))
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f.Close()
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// Name of destination.
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dst := filepath.Join(dir, "test")
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// Compile source.
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cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", dst, src)
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out, err := cmd.CombinedOutput()
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if err != nil {
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t.Fatalf("could not build target: %v\n%s", err, out)
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}
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// Check destination to see if scanf code was included.
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cmd = exec.Command(testenv.GoToolPath(t), "tool", "nm", dst)
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out, err = cmd.CombinedOutput()
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if err != nil {
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t.Fatalf("could not read target: %v", err)
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}
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if bytes.Contains(out, []byte("scanInt")) {
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t.Fatalf("scanf code not removed from helloworld")
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}
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}
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// Make sure -S prints assembly code. See issue 14515.
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func TestDashS(t *testing.T) {
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testenv.MustHaveGoBuild(t)
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t.Parallel()
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// Make a directory to work in.
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dir, err := os.MkdirTemp("", "issue14515-")
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if err != nil {
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t.Fatalf("could not create directory: %v", err)
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}
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defer os.RemoveAll(dir)
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// Create source.
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src := filepath.Join(dir, "test.go")
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f, err := os.Create(src)
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if err != nil {
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t.Fatalf("could not create source file: %v", err)
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}
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f.Write([]byte(`
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package main
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import "fmt"
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func main() {
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fmt.Println("hello world")
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}
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`))
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f.Close()
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// Compile source.
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cmd := exec.Command(testenv.GoToolPath(t), "build", "-gcflags", "-S", "-o", filepath.Join(dir, "test"), src)
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out, err := cmd.CombinedOutput()
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if err != nil {
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t.Fatalf("could not build target: %v\n%s", err, out)
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}
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patterns := []string{
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// It is hard to look for actual instructions in an
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// arch-independent way. So we'll just look for
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// pseudo-ops that are arch-independent.
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"\tTEXT\t",
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"\tFUNCDATA\t",
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"\tPCDATA\t",
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}
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outstr := string(out)
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for _, p := range patterns {
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if !strings.Contains(outstr, p) {
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println(outstr)
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panic("can't find pattern " + p)
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}
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}
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}
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