| // skip |
| |
| // Copyright 2015 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. |
| |
| // This is built by issue10607.go with a -B option. |
| // Verify that we have one build-id note with the expected value. |
| |
| package main |
| |
| import ( |
| "bytes" |
| "debug/elf" |
| "fmt" |
| "os" |
| ) |
| |
| func main() { |
| f, err := elf.Open("/proc/self/exe") |
| if err != nil { |
| if os.IsNotExist(err) { |
| return |
| } |
| fmt.Fprintln(os.Stderr, "opening /proc/self/exe:", err) |
| os.Exit(1) |
| } |
| |
| c := 0 |
| fail := false |
| for i, s := range f.Sections { |
| if s.Type != elf.SHT_NOTE { |
| continue |
| } |
| |
| d, err := s.Data() |
| if err != nil { |
| fmt.Fprintf(os.Stderr, "reading data of note section %d: %v\n", i, err) |
| continue |
| } |
| |
| for len(d) > 0 { |
| namesz := f.ByteOrder.Uint32(d) |
| descsz := f.ByteOrder.Uint32(d[4:]) |
| typ := f.ByteOrder.Uint32(d[8:]) |
| |
| an := (namesz + 3) &^ 3 |
| ad := (descsz + 3) &^ 3 |
| |
| if int(12+an+ad) > len(d) { |
| 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) |
| break |
| } |
| |
| // 3 == NT_GNU_BUILD_ID |
| if typ == 3 && namesz == 4 && bytes.Equal(d[12:16], []byte("GNU\000")) { |
| id := string(d[12+an:12+an+descsz]) |
| if id == "\x12\x34\x56\x78" { |
| c++ |
| } else { |
| fmt.Fprintf(os.Stderr, "wrong build ID data: %q\n", id) |
| fail = true |
| } |
| } |
| |
| d = d[12+an+ad:] |
| } |
| } |
| |
| if c == 0 { |
| fmt.Fprintln(os.Stderr, "no build-id note") |
| fail = true |
| } else if c > 1 { |
| fmt.Fprintln(os.Stderr, c, "build-id notes") |
| fail = true |
| } |
| |
| if fail { |
| os.Exit(1) |
| } |
| } |
