github.com/euank/go@v0.0.0-20160829210321-495514729181/src/cmd/go/note_test.go (about)

     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  	main "cmd/go"
     9  	"go/build"
    10  	"runtime"
    11  	"testing"
    12  )
    13  
    14  func TestNoteReading(t *testing.T) {
    15  	testNoteReading(t)
    16  }
    17  
    18  func TestNoteReading2K(t *testing.T) {
    19  	if runtime.GOOS == "windows" {
    20  		t.Skipf("2kB is not enough on %s", runtime.GOOS)
    21  	}
    22  	// Set BuildIDReadSize to 2kB to exercise Mach-O parsing more strictly.
    23  	defer func(old int) {
    24  		main.BuildIDReadSize = old
    25  	}(main.BuildIDReadSize)
    26  	main.BuildIDReadSize = 2 * 1024
    27  
    28  	testNoteReading(t)
    29  }
    30  
    31  func testNoteReading(t *testing.T) {
    32  	tg := testgo(t)
    33  	defer tg.cleanup()
    34  	tg.tempFile("hello.go", `package main; func main() { print("hello, world\n") }`)
    35  	const buildID = "TestNoteReading-Build-ID"
    36  	tg.run("build", "-ldflags", "-buildid="+buildID, "-o", tg.path("hello.exe"), tg.path("hello.go"))
    37  	id, err := main.ReadBuildIDFromBinary(tg.path("hello.exe"))
    38  	if err != nil {
    39  		t.Fatalf("reading build ID from hello binary: %v", err)
    40  	}
    41  	if id != buildID {
    42  		t.Fatalf("buildID in hello binary = %q, want %q", id, buildID)
    43  	}
    44  
    45  	switch {
    46  	case !build.Default.CgoEnabled:
    47  		t.Skipf("skipping - no cgo, so assuming external linking not available")
    48  	case runtime.GOOS == "linux" && (runtime.GOARCH == "ppc64le" || runtime.GOARCH == "ppc64"):
    49  		t.Skipf("skipping - external linking not supported, golang.org/issue/11184")
    50  	case runtime.GOOS == "openbsd" && runtime.GOARCH == "arm":
    51  		t.Skipf("skipping - external linking not supported, golang.org/issue/10619")
    52  	case runtime.GOOS == "plan9":
    53  		t.Skipf("skipping - external linking not supported")
    54  	}
    55  
    56  	tg.run("build", "-ldflags", "-buildid="+buildID+" -linkmode=external", "-o", tg.path("hello.exe"), tg.path("hello.go"))
    57  	id, err = main.ReadBuildIDFromBinary(tg.path("hello.exe"))
    58  	if err != nil {
    59  		t.Fatalf("reading build ID from hello binary (linkmode=external): %v", err)
    60  	}
    61  	if id != buildID {
    62  		t.Fatalf("buildID in hello binary = %q, want %q (linkmode=external)", id, buildID)
    63  	}
    64  }