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// 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)
}
}