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Viewing changes to misc/cgo/test/issue7560.go

  • Committer: Package Import Robot
  • Author(s): Serge Hallyn
  • Date: 2014-11-18 15:12:26 UTC
  • mfrom: (14.2.12 vivid-proposed)
  • Revision ID: package-import@ubuntu.com-20141118151226-zug7vn93mn3dtiz3
Tags: 2:1.3.2-1ubuntu1
* Merge from Debian unstable.  Remaining changes:
  - 016-armhf-elf-header.patch: Use correct ELF header for armhf binaries.
  - Support co-installability with gccgo-go tool:
    - d/rules,golang-go.install: Rename bin/go -> bin/golang-go
    - d/golang-go.{postinst,prerm}: Install/remove /usr/bin/go using
      alternatives.
  - d/copyright: Amendments for full compiliance with copyright format.
  - d/control: Demote golang-go.tools to Suggests to support Ubuntu MIR.
  - dropped patches (now upstream):
    - d/p/issue27650045_40001_50001.diff
    - d/p/issue28050043_60001_70001.diff
    - d/p/issue54790044_100001_110001.diff

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misc/cgo/test/issue7560.go
 
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// Copyright 2014 The Go Authors.  All rights reserved.
 
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// Use of this source code is governed by a BSD-style
 
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// license that can be found in the LICENSE file.
 
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package cgotest
 
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/*
 
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#include <stdint.h>
 
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typedef struct {
 
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        char x;
 
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        long y;
 
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} __attribute__((__packed__)) misaligned;
 
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int
 
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offset7560(void)
 
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{
 
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        return (uintptr_t)&((misaligned*)0)->y;
 
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}
 
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*/
 
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import "C"
 
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import (
 
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        "reflect"
 
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        "testing"
 
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)
 
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func test7560(t *testing.T) {
 
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        // some mingw don't implement __packed__ correctly.
 
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        if C.offset7560() != 1 {
 
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                t.Skip("C compiler did not pack struct")
 
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        }
 
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        // C.misaligned should have x but then a padding field to get to the end of the struct.
 
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        // There should not be a field named 'y'.
 
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        var v C.misaligned
 
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        rt := reflect.TypeOf(&v).Elem()
 
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        if rt.NumField() != 2 || rt.Field(0).Name != "x" || rt.Field(1).Name != "_" {
 
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                t.Errorf("unexpected fields in C.misaligned:\n")
 
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                for i := 0; i < rt.NumField(); i++ {
 
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                        t.Logf("%+v\n", rt.Field(i))
 
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                }
 
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        }
 
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}