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Source file src/cmd/go/note_test.go

Documentation: cmd/go

  // 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.
  
  package main_test
  
  import (
  	"go/build"
  	"runtime"
  	"testing"
  
  	"cmd/go/internal/buildid"
  )
  
  func TestNoteReading(t *testing.T) {
  	testNoteReading(t)
  }
  
  func TestNoteReading2K(t *testing.T) {
  	if runtime.GOOS == "windows" {
  		t.Skipf("2kB is not enough on %s", runtime.GOOS)
  	}
  	// Set BuildIDReadSize to 2kB to exercise Mach-O parsing more strictly.
  	defer func(old int) {
  		buildid.BuildIDReadSize = old
  	}(buildid.BuildIDReadSize)
  	buildid.BuildIDReadSize = 2 * 1024
  
  	testNoteReading(t)
  }
  
  func testNoteReading(t *testing.T) {
  	tg := testgo(t)
  	defer tg.cleanup()
  	tg.tempFile("hello.go", `package main; func main() { print("hello, world\n") }`)
  	const buildID = "TestNoteReading-Build-ID"
  	tg.run("build", "-ldflags", "-buildid="+buildID, "-o", tg.path("hello.exe"), tg.path("hello.go"))
  	id, err := buildid.ReadBuildIDFromBinary(tg.path("hello.exe"))
  	if err != nil {
  		t.Fatalf("reading build ID from hello binary: %v", err)
  	}
  	if id != buildID {
  		t.Fatalf("buildID in hello binary = %q, want %q", id, buildID)
  	}
  
  	switch {
  	case !build.Default.CgoEnabled:
  		t.Skipf("skipping - no cgo, so assuming external linking not available")
  	case runtime.GOOS == "linux" && (runtime.GOARCH == "ppc64le" || runtime.GOARCH == "ppc64"):
  		t.Skipf("skipping - external linking not supported, golang.org/issue/11184")
  	case runtime.GOOS == "openbsd" && runtime.GOARCH == "arm":
  		t.Skipf("skipping - external linking not supported, golang.org/issue/10619")
  	case runtime.GOOS == "plan9":
  		t.Skipf("skipping - external linking not supported")
  	}
  
  	tg.run("build", "-ldflags", "-buildid="+buildID+" -linkmode=external", "-o", tg.path("hello.exe"), tg.path("hello.go"))
  	id, err = buildid.ReadBuildIDFromBinary(tg.path("hello.exe"))
  	if err != nil {
  		t.Fatalf("reading build ID from hello binary (linkmode=external): %v", err)
  	}
  	if id != buildID {
  		t.Fatalf("buildID in hello binary = %q, want %q (linkmode=external)", id, buildID)
  	}
  }
  

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