aboutsummaryrefslogtreecommitdiff
path: root/src/cmd/compile/internal/gc/sizeof_test.go
blob: bd4453fa842120040f390bd5e6b99aaba5f61169 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
// Copyright 2016 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.

// +build !nacl

package gc

import (
	"reflect"
	"testing"
	"unsafe"
)

// Assert that the size of important structures do not change unexpectedly.

func TestSizeof(t *testing.T) {
	const _64bit = unsafe.Sizeof(uintptr(0)) == 8

	var tests = []struct {
		val    interface{} // type as a value
		_32bit uintptr     // size on 32bit platforms
		_64bit uintptr     // size on 64bit platforms
	}{
		{Func{}, 128, 224},
		{Name{}, 36, 56},
		{Param{}, 28, 56},
		{Node{}, 76, 128},
	}

	for _, tt := range tests {
		want := tt._32bit
		if _64bit {
			want = tt._64bit
		}
		got := reflect.TypeOf(tt.val).Size()
		if want != got {
			t.Errorf("unsafe.Sizeof(%T) = %d, want %d", tt.val, got, want)
		}
	}
}