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// +build gc 6 7package main_test 8 9import ( 10 "go/build" 11 "runtime" 12 "testing" 13 14 "cmd/internal/buildid" 15) 16 17func TestNoteReading(t *testing.T) { 18 // cmd/internal/buildid already has tests that the basic reading works. 19 // This test is essentially checking that -ldflags=-buildid=XXX works, 20 // both in internal and external linking mode. 21 tg := testgo(t) 22 defer tg.cleanup() 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 == "openbsd" && runtime.GOARCH == "arm": 38 t.Skipf("skipping - external linking not supported, golang.org/issue/10619") 39 case runtime.GOOS == "plan9": 40 t.Skipf("skipping - external linking not supported") 41 } 42 43 tg.run("build", "-ldflags", "-buildid="+buildID+" -linkmode=external", "-o", tg.path("hello2.exe"), tg.path("hello.go")) 44 id, err = buildid.ReadFile(tg.path("hello2.exe")) 45 if err != nil { 46 t.Fatalf("reading build ID from hello binary (linkmode=external): %v", err) 47 } 48 if id != buildID { 49 t.Fatalf("buildID in hello binary = %q, want %q (linkmode=external)", id, buildID) 50 } 51 52 switch runtime.GOOS { 53 case "dragonfly", "freebsd", "linux", "netbsd", "openbsd": 54 // Test while forcing use of the gold linker, since in the past 55 // we've had trouble reading the notes generated by gold. 56 err := tg.doRun([]string{"build", "-ldflags", "-buildid=" + buildID + " -linkmode=external -extldflags=-fuse-ld=gold", "-o", tg.path("hello3.exe"), tg.path("hello.go")}) 57 if err != nil { 58 if tg.grepCountBoth("(invalid linker|gold|cannot find 'ld')") > 0 { 59 // It's not an error if gold isn't there. gcc claims it "cannot find 'ld'" if 60 // ld.gold is missing, see issue #22340. 61 t.Log("skipping gold test") 62 break 63 } 64 t.Fatalf("building hello binary: %v", err) 65 } 66 id, err = buildid.ReadFile(tg.path("hello3.exe")) 67 if err != nil { 68 t.Fatalf("reading build ID from hello binary (linkmode=external -extldflags=-fuse-ld=gold): %v", err) 69 } 70 if id != buildID { 71 t.Fatalf("buildID in hello binary = %q, want %q (linkmode=external -extldflags=-fuse-ld=gold)", id, buildID) 72 } 73 } 74} 75