src/syscall/zx/types_fuchsia_test.go

// Copyright 2021 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 zx_test

import (
	"syscall/zx"
	"testing"
	"unsafe"
)

func TestVmoInfo(t *testing.T) {
	const vmoSize uint64 = 4096
	const vmoName = "test-vmo"

	vmo, err := zx.NewVMO(vmoSize, 0)
	if err != nil {
		t.Fatalf("zx.NewVMO(%d, 0) = %s", vmoSize, err)
	}
	defer func() {
		if err := vmo.Close(); err != nil {
			t.Errorf("vmo.Close() = %s", err)
		}
	}()

	if err := vmo.Handle().SetProperty(zx.PropName, []byte(vmoName)); err != nil {
		t.Fatalf("vmo.Handle().SetProperty(%d, %s) = %s", zx.PropName, vmoName, err)
	}

	var info zx.InfoVmo
	if err := vmo.Handle().GetInfo(zx.ObjectInfoVMO, unsafe.Pointer(&info), uint(unsafe.Sizeof(info))); err != nil {
		t.Fatalf("vmo.Handle().GetInfo(%d, _, %d) = %s", zx.ObjectInfoVMO, unsafe.Sizeof(info), err)
	}

	if info.Koid == 0 {
		t.Errorf("info.Koid == 0, expected nonzero")
	}
	if got, want := string(info.Name[:len(vmoName)]), vmoName; got != want {
		t.Errorf("got info.Name = %s, want = %s", got, want)
	}
	if got, want := info.SizeBytes, vmoSize; got != want {
		t.Errorf("got info.SizeBytes = %d, want = %d", got, want)
	}
	if got, want := info.ParentKoid, uint64(0); got != want {
		t.Errorf("got info.ParentKoid = %d, want = %d", got, want)
	}
	if got, want := info.NumChildren, uint(0); got != want {
		t.Errorf("got info.NumChildren = %d, want = %d", got, want)
	}
	if got, want := info.NumMappings, uint(0); got != want {
		t.Errorf("got info.NumMappings = %d, want = %d", got, want)
	}
	if got, want := info.ShareCount, uint(1); got != want {
		t.Errorf("got info.ShareCount = %d, want = %d", got, want)
	}
	if got, want := info.Flags, uint32(zx.ZX_INFO_VMO_TYPE_PAGED|zx.ZX_INFO_VMO_VIA_HANDLE); got != want {
		t.Errorf("got info.Flags = %d, want = %d", got, want)
	}
	if got, want := info.CommittedBytes, uint64(0); got != want {
		t.Errorf("got info.CommittedBytes = %d, want = %d", got, want)
	}
	if got, want := info.CachePolicy, uint32(zx.ZX_CACHE_POLICY_CACHED); got != want {
		t.Errorf("got info.CachePolicy = %d, want = %d", got, want)
	}
	if got, want := info.MetadataBytes, uint64(0); got != want {
		t.Errorf("got info.MetadataBytes = %d, want = %d", got, want)
	}
	if got, want := info.CommittedChangeEvents, uint64(0); got != want {
		t.Errorf("got info.CommittedChangeEvents = %d, want = %d", got, want)
	}
}