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https://github.com/golang/go
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e9fcd6ed2b
Fixes #10607. Change-Id: Ib294cf65b07103b60f62b86b21ff2d07b25136fe Reviewed-on: https://go-review.googlesource.com/12242 Reviewed-by: Russ Cox <rsc@golang.org>
82 lines
1.6 KiB
Go
82 lines
1.6 KiB
Go
// skip
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// 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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// This is built by issue10607.go with a -B option.
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// Verify that we have one build-id note with the expected value.
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package main
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import (
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"bytes"
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"debug/elf"
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"fmt"
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"os"
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)
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func main() {
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f, err := elf.Open("/proc/self/exe")
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if err != nil {
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if os.IsNotExist(err) {
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return
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}
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fmt.Fprintln(os.Stderr, "opening /proc/self/exe:", err)
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os.Exit(1)
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}
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c := 0
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fail := false
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for i, s := range f.Sections {
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if s.Type != elf.SHT_NOTE {
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continue
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}
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d, err := s.Data()
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if err != nil {
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fmt.Fprintln(os.Stderr, "reading data of note section %d: %v", i, err)
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continue
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}
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for len(d) > 0 {
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namesz := f.ByteOrder.Uint32(d)
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descsz := f.ByteOrder.Uint32(d[4:])
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typ := f.ByteOrder.Uint32(d[8:])
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an := (namesz + 3) &^ 3
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ad := (descsz + 3) &^ 3
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if int(12+an+ad) > len(d) {
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fmt.Fprintf(os.Stderr, "note section %d too short for header (%d < 12 + align(%d,4) + align(%d,4))\n", i, len(d), namesz, descsz)
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break
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}
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// 3 == NT_GNU_BUILD_ID
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if typ == 3 && namesz == 4 && bytes.Equal(d[12:16], []byte("GNU\000")) {
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id := string(d[12+an:12+an+descsz])
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if id == "\x12\x34\x56\x78" {
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c++
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} else {
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fmt.Fprintf(os.Stderr, "wrong build ID data: %q\n", id)
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fail = true
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}
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}
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d = d[12+an+ad:]
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}
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}
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if c == 0 {
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fmt.Fprintln(os.Stderr, "no build-id note")
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fail = true
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} else if c > 1 {
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fmt.Fprintln(os.Stderr, c, "build-id notes")
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fail = true
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}
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if fail {
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os.Exit(1)
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}
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}
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