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// +build cgo
// 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 ld
import (
"debug/elf"
"internal/testenv"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"testing"
)
func TestDynSymShInfo(t *testing.T) {
t.Parallel()
testenv.MustHaveGoBuild(t)
dir, err := ioutil.TempDir("", "go-build-issue33358")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(dir)
const prog = `
package main
import "net"
func main() {
net.Dial("", "")
}
`
src := filepath.Join(dir, "issue33358.go")
if err := ioutil.WriteFile(src, []byte(prog), 0666); err != nil {
t.Fatal(err)
}
binFile := filepath.Join(dir, "issue33358")
cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", binFile, src)
if out, err := cmd.CombinedOutput(); err != nil {
t.Fatalf("%v: %v:\n%s", cmd.Args, err, out)
}
fi, err := os.Open(binFile)
if err != nil {
t.Fatalf("failed to open built file: %v", err)
}
elfFile, err := elf.NewFile(fi)
if err != nil {
t.Skip("The system may not support ELF, skipped.")
}
section := elfFile.Section(".dynsym")
if section == nil {
t.Fatal("no dynsym")
}
symbols, err := elfFile.DynamicSymbols()
if err != nil {
t.Fatalf("failed to get dynamic symbols: %v", err)
}
var numLocalSymbols uint32
for i, s := range symbols {
if elf.ST_BIND(s.Info) != elf.STB_LOCAL {
numLocalSymbols = uint32(i + 1)
break
}
}
if section.Info != numLocalSymbols {
t.Fatalf("Unexpected sh info, want greater than 0, got: %d", section.Info)
}
}
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