mirror of
https://github.com/golang/go
synced 2024-11-23 14:50:07 -07:00
6e5ccce87f
Fixes these warnings from go vet: buildid_linux.go:25: no formatting directive in Fatalf call callback.go:180: arg pc[i] for printf verb %p of wrong type: uintptr env.go:34: possible misuse of unsafe.Pointer issue7665.go:22: possible misuse of unsafe.Pointer Change-Id: I83811b9c10c617139713a626b4a34ab05564d4fe Reviewed-on: https://go-review.googlesource.com/15802 Reviewed-by: David Crawshaw <crawshaw@golang.org>
78 lines
1.6 KiB
Go
78 lines
1.6 KiB
Go
// Copyright 2014 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 cgotest
|
|
|
|
// Test that we have no more than one build ID. In the past we used
|
|
// to generate a separate build ID for each package using cgo, and the
|
|
// linker concatenated them all. We don't want that--we only want
|
|
// one.
|
|
|
|
import (
|
|
"bytes"
|
|
"debug/elf"
|
|
"os"
|
|
"testing"
|
|
)
|
|
|
|
func testBuildID(t *testing.T) {
|
|
f, err := elf.Open("/proc/self/exe")
|
|
if err != nil {
|
|
if os.IsNotExist(err) {
|
|
t.Skip("no /proc/self/exe")
|
|
}
|
|
t.Fatal("opening /proc/self/exe: ", err)
|
|
}
|
|
defer f.Close()
|
|
|
|
c := 0
|
|
for i, s := range f.Sections {
|
|
if s.Type != elf.SHT_NOTE {
|
|
continue
|
|
}
|
|
|
|
d, err := s.Data()
|
|
if err != nil {
|
|
t.Logf("reading data of note section %d: %v", i, err)
|
|
continue
|
|
}
|
|
|
|
for len(d) > 0 {
|
|
|
|
// ELF standards differ as to the sizes in
|
|
// note sections. Both the GNU linker and
|
|
// gold always generate 32-bit sizes, so that
|
|
// is what we assume here.
|
|
|
|
if len(d) < 12 {
|
|
t.Logf("note section %d too short (%d < 12)", i, len(d))
|
|
continue
|
|
}
|
|
|
|
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) {
|
|
t.Logf("note section %d too short for header (%d < 12 + align(%d,4) + align(%d,4))", i, len(d), namesz, descsz)
|
|
continue
|
|
}
|
|
|
|
// 3 == NT_GNU_BUILD_ID
|
|
if typ == 3 && namesz == 4 && bytes.Equal(d[12:16], []byte("GNU\000")) {
|
|
c++
|
|
}
|
|
|
|
d = d[12+an+ad:]
|
|
}
|
|
}
|
|
|
|
if c > 1 {
|
|
t.Errorf("found %d build ID notes", c)
|
|
}
|
|
}
|