mirror of
https://github.com/golang/go
synced 2024-11-24 19:50:18 -07:00
45 lines
946 B
Go
45 lines
946 B
Go
|
// Copyright 2014 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 cgotest
|
||
|
|
|
||
|
|
/*
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
char x;
|
||
|
|
long y;
|
||
|
|
} __attribute__((__packed__)) misaligned;
|
||
|
|
|
||
|
|
int
|
||
|
|
offset7560(void)
|
||
|
|
{
|
||
|
|
return (uintptr_t)&((misaligned*)0)->y;
|
||
|
|
}
|
||
|
|
*/
|
||
|
|
import "C"
|
||
|
|
|
||
|
|
import (
|
||
|
|
"reflect"
|
||
|
|
"testing"
|
||
|
|
)
|
||
|
|
|
||
|
|
func test7560(t *testing.T) {
|
||
|
|
// some mingw don't implement __packed__ correctly.
|
||
|
|
if C.offset7560() != 1 {
|
||
|
|
t.Skip("C compiler did not pack struct")
|
||
|
|
}
|
||
|
|
|
||
|
|
// C.misaligned should have x but then a padding field to get to the end of the struct.
|
||
|
|
// There should not be a field named 'y'.
|
||
|
|
var v C.misaligned
|
||
|
|
rt := reflect.TypeOf(&v).Elem()
|
||
|
|
if rt.NumField() != 2 || rt.Field(0).Name != "x" || rt.Field(1).Name != "_" {
|
||
|
|
t.Errorf("unexpected fields in C.misaligned:\n")
|
||
|
|
for i := 0; i < rt.NumField(); i++ {
|
||
|
|
t.Logf("%+v\n", rt.Field(i))
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|