src/cmd/go/note_test.go

   1 // Copyright 2015 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 package main_test
   6
   7 import (
   8         "go/build"
   9         "runtime"
  10         "testing"
  11
  12         "cmd/internal/buildid"
  13 )
  14
  15 func TestNoteReading(t *testing.T) {
  16         // cmd/internal/buildid already has tests that the basic reading works.
  17         // This test is essentially checking that -ldflags=-buildid=XXX works,
  18         // both in internal and external linking mode.
  19         tg := testgo(t)
  20         defer tg.cleanup()
  21         tg.parallel()
  22
  23         tg.tempFile("hello.go", `package main; func main() { print("hello, world\n") }`)
  24         const buildID = "TestNoteReading-Build-ID"
  25         tg.run("build", "-ldflags", "-buildid="+buildID, "-o", tg.path("hello.exe"), tg.path("hello.go"))
  26         id, err := buildid.ReadFile(tg.path("hello.exe"))
  27         if err != nil {
  28                 t.Fatalf("reading build ID from hello binary: %v", err)
  29         }
  30         if id != buildID {
  31                 t.Fatalf("buildID in hello binary = %q, want %q", id, buildID)
  32         }
  33
  34         switch {
  35         case !build.Default.CgoEnabled:
  36                 t.Skipf("skipping - no cgo, so assuming external linking not available")
  37         case runtime.GOOS == "plan9":
  38                 t.Skipf("skipping - external linking not supported")
  39         }
  40
  41         tg.run("build", "-ldflags", "-buildid="+buildID+" -linkmode=external", "-o", tg.path("hello2.exe"), tg.path("hello.go"))
  42         id, err = buildid.ReadFile(tg.path("hello2.exe"))
  43         if err != nil {
  44                 t.Fatalf("reading build ID from hello binary (linkmode=external): %v", err)
  45         }
  46         if id != buildID {
  47                 t.Fatalf("buildID in hello binary = %q, want %q (linkmode=external)", id, buildID)
  48         }
  49
  50         switch runtime.GOOS {
  51         case "dragonfly", "freebsd", "linux", "netbsd", "openbsd":
  52                 // Test while forcing use of the gold linker, since in the past
  53                 // we've had trouble reading the notes generated by gold.
  54                 err := tg.doRun([]string{"build", "-ldflags", "-buildid=" + buildID + " -linkmode=external -extldflags=-fuse-ld=gold", "-o", tg.path("hello3.exe"), tg.path("hello.go")})
  55                 if err != nil {
  56                         if tg.grepCountBoth("(invalid linker|gold|cannot find [‘']ld[’'])") > 0 {
  57                                 // It's not an error if gold isn't there. gcc claims it "cannot find 'ld'" if
  58                                 // ld.gold is missing, see issue #22340.
  59                                 t.Log("skipping gold test")
  60                                 break
  61                         }
  62                         t.Fatalf("building hello binary: %v", err)
  63                 }
  64                 id, err = buildid.ReadFile(tg.path("hello3.exe"))
  65                 if err != nil {
  66                         t.Fatalf("reading build ID from hello binary (linkmode=external -extldflags=-fuse-ld=gold): %v", err)
  67                 }
  68                 if id != buildID {
  69                         t.Fatalf("buildID in hello binary = %q, want %q (linkmode=external -extldflags=-fuse-ld=gold)", id, buildID)
  70                 }
  71         }
  72 }