43 lines
996 B
Go
43 lines
996 B
Go
// Copyright 2018 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 runtime_test
|
|
|
|
import (
|
|
"reflect"
|
|
"runtime"
|
|
"testing"
|
|
"unsafe"
|
|
)
|
|
|
|
// Assert that the size of important structures do not change unexpectedly.
|
|
|
|
func TestSizeof(t *testing.T) {
|
|
if runtime.Compiler != "gc" {
|
|
t.Skip("skipping size test; specific to gc compiler")
|
|
}
|
|
|
|
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
|
|
}{
|
|
{runtime.G{}, 216, 376}, // g, but exported for testing
|
|
{runtime.Sudog{}, 56, 88}, // sudog, but exported for testing
|
|
}
|
|
|
|
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)
|
|
}
|
|
}
|
|
}
|