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// Copyright 2018 The gVisor Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package syserror_test
import (
"errors"
"io"
"io/fs"
"syscall"
"testing"
"golang.org/x/sys/unix"
"gvisor.dev/gvisor/pkg/abi/linux/errno"
gErrors "gvisor.dev/gvisor/pkg/errors"
"gvisor.dev/gvisor/pkg/errors/linuxerr"
"gvisor.dev/gvisor/pkg/syserror"
)
var globalError error
func BenchmarkAssignUnix(b *testing.B) {
for i := b.N; i > 0; i-- {
globalError = unix.EINVAL
}
}
func BenchmarkAssignLinuxerr(b *testing.B) {
for i := b.N; i > 0; i-- {
globalError = linuxerr.EINVAL
}
}
func BenchmarkAssignSyserror(b *testing.B) {
for i := b.N; i > 0; i-- {
globalError = syserror.EINVAL
}
}
func BenchmarkCompareUnix(b *testing.B) {
globalError = unix.EAGAIN
j := 0
for i := b.N; i > 0; i-- {
if globalError == unix.EINVAL {
j++
}
}
}
func BenchmarkCompareLinuxerr(b *testing.B) {
globalError = linuxerr.E2BIG
j := 0
for i := b.N; i > 0; i-- {
if globalError == linuxerr.EINVAL {
j++
}
}
}
func BenchmarkCompareSyserror(b *testing.B) {
globalError = syserror.EAGAIN
j := 0
for i := b.N; i > 0; i-- {
if globalError == syserror.EINVAL {
j++
}
}
}
func BenchmarkSwitchUnix(b *testing.B) {
globalError = unix.EPERM
j := 0
for i := b.N; i > 0; i-- {
switch globalError {
case unix.EINVAL:
j++
case unix.EINTR:
j += 2
case unix.EAGAIN:
j += 3
}
}
}
func BenchmarkSwitchLinuxerr(b *testing.B) {
globalError = linuxerr.EPERM
j := 0
for i := b.N; i > 0; i-- {
switch globalError {
case linuxerr.EINVAL:
j++
case linuxerr.EINTR:
j += 2
case linuxerr.EAGAIN:
j += 3
}
}
}
func BenchmarkSwitchSyserror(b *testing.B) {
globalError = syserror.EPERM
j := 0
for i := b.N; i > 0; i-- {
switch globalError {
case syserror.EINVAL:
j++
case syserror.EINTR:
j += 2
case syserror.EAGAIN:
j += 3
}
}
}
func BenchmarkReturnUnix(b *testing.B) {
var localError error
f := func() error {
return unix.EINVAL
}
for i := b.N; i > 0; i-- {
localError = f()
}
if localError != nil {
return
}
}
func BenchmarkReturnLinuxerr(b *testing.B) {
var localError error
f := func() error {
return linuxerr.EINVAL
}
for i := b.N; i > 0; i-- {
localError = f()
}
if localError != nil {
return
}
}
func BenchmarkConvertUnixLinuxerr(b *testing.B) {
var localError error
for i := b.N; i > 0; i-- {
localError = linuxerr.ErrorFromErrno(errno.Errno(unix.EINVAL))
}
if localError != nil {
return
}
}
func BenchmarkConvertUnixLinuxerrZero(b *testing.B) {
var localError error
for i := b.N; i > 0; i-- {
localError = linuxerr.ErrorFromErrno(errno.Errno(0))
}
if localError != nil {
return
}
}
type translationTestTable struct {
fn string
errIn error
syscallErrorIn unix.Errno
expectedBool bool
expectedTranslation unix.Errno
}
func TestErrorTranslation(t *testing.T) {
myError := errors.New("My test error")
myError2 := errors.New("Another test error")
testTable := []translationTestTable{
{"TranslateError", myError, 0, false, 0},
{"TranslateError", myError2, 0, false, 0},
{"AddErrorTranslation", myError, unix.EAGAIN, true, 0},
{"AddErrorTranslation", myError, unix.EAGAIN, false, 0},
{"AddErrorTranslation", myError, unix.EPERM, false, 0},
{"TranslateError", myError, 0, true, unix.EAGAIN},
{"TranslateError", myError2, 0, false, 0},
{"AddErrorTranslation", myError2, unix.EPERM, true, 0},
{"AddErrorTranslation", myError2, unix.EPERM, false, 0},
{"AddErrorTranslation", myError2, unix.EAGAIN, false, 0},
{"TranslateError", myError, 0, true, unix.EAGAIN},
{"TranslateError", myError2, 0, true, unix.EPERM},
}
for _, tt := range testTable {
switch tt.fn {
case "TranslateError":
err, ok := syserror.TranslateError(tt.errIn)
if ok != tt.expectedBool {
t.Fatalf("%v(%v) => %v expected %v", tt.fn, tt.errIn, ok, tt.expectedBool)
} else if err != tt.expectedTranslation {
t.Fatalf("%v(%v) (error) => %v expected %v", tt.fn, tt.errIn, err, tt.expectedTranslation)
}
case "AddErrorTranslation":
ok := syserror.AddErrorTranslation(tt.errIn, tt.syscallErrorIn)
if ok != tt.expectedBool {
t.Fatalf("%v(%v) => %v expected %v", tt.fn, tt.errIn, ok, tt.expectedBool)
}
default:
t.Fatalf("Unknown function %v", tt.fn)
}
}
}
func TestSyscallErrnoToErrors(t *testing.T) {
for _, tc := range []struct {
errno syscall.Errno
err *gErrors.Error
}{
{errno: syscall.EACCES, err: linuxerr.EACCES},
{errno: syscall.EAGAIN, err: linuxerr.EAGAIN},
{errno: syscall.EBADF, err: linuxerr.EBADF},
{errno: syscall.EBUSY, err: linuxerr.EBUSY},
{errno: syscall.EDOM, err: linuxerr.EDOM},
{errno: syscall.EEXIST, err: linuxerr.EEXIST},
{errno: syscall.EFAULT, err: linuxerr.EFAULT},
{errno: syscall.EFBIG, err: linuxerr.EFBIG},
{errno: syscall.EINTR, err: linuxerr.EINTR},
{errno: syscall.EINVAL, err: linuxerr.EINVAL},
{errno: syscall.EIO, err: linuxerr.EIO},
{errno: syscall.ENOTDIR, err: linuxerr.ENOTDIR},
{errno: syscall.ENOTTY, err: linuxerr.ENOTTY},
{errno: syscall.EPERM, err: linuxerr.EPERM},
{errno: syscall.EPIPE, err: linuxerr.EPIPE},
{errno: syscall.ESPIPE, err: linuxerr.ESPIPE},
{errno: syscall.EWOULDBLOCK, err: linuxerr.EAGAIN},
} {
t.Run(tc.errno.Error(), func(t *testing.T) {
e := linuxerr.ErrorFromErrno(errno.Errno(tc.errno))
if e != tc.err {
t.Fatalf("Mismatch errors: want: %+v (%d) got: %+v %d", tc.err, tc.err.Errno(), e, e.Errno())
}
})
}
}
// TestEqualsMethod tests that the Equals method correctly compares syerror,
// unix.Errno and linuxerr.
// TODO (b/34162363): Remove this.
func TestEqualsMethod(t *testing.T) {
for _, tc := range []struct {
name string
linuxErr []*gErrors.Error
err []error
equal bool
}{
{
name: "compare nil",
linuxErr: []*gErrors.Error{nil, linuxerr.NOERROR},
err: []error{nil, linuxerr.NOERROR, unix.Errno(0)},
equal: true,
},
{
name: "linuxerr nil error not",
linuxErr: []*gErrors.Error{nil, linuxerr.NOERROR},
err: []error{unix.Errno(1), linuxerr.EPERM, syserror.EACCES},
equal: false,
},
{
name: "linuxerr not nil error nil",
linuxErr: []*gErrors.Error{linuxerr.ENOENT},
err: []error{nil, unix.Errno(0), linuxerr.NOERROR},
equal: false,
},
{
name: "equal errors",
linuxErr: []*gErrors.Error{linuxerr.ESRCH},
err: []error{linuxerr.ESRCH, syserror.ESRCH, unix.Errno(linuxerr.ESRCH.Errno())},
equal: true,
},
{
name: "unequal errors",
linuxErr: []*gErrors.Error{linuxerr.ENOENT},
err: []error{linuxerr.ESRCH, syserror.ESRCH, unix.Errno(linuxerr.ESRCH.Errno())},
equal: false,
},
{
name: "other error",
linuxErr: []*gErrors.Error{nil, linuxerr.NOERROR, linuxerr.E2BIG, linuxerr.EINVAL},
err: []error{fs.ErrInvalid, io.EOF},
equal: false,
},
} {
t.Run(tc.name, func(t *testing.T) {
for _, le := range tc.linuxErr {
for _, e := range tc.err {
if linuxerr.Equals(le, e) != tc.equal {
t.Fatalf("Expected %t from Equals method for linuxerr: %s %T and error: %s %T", tc.equal, le, le, e, e)
}
}
}
})
}
}
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