109 lines
2.4 KiB
Go
109 lines
2.4 KiB
Go
// Copyright 2018 Google Inc.
|
|
//
|
|
// 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 kernel
|
|
|
|
import (
|
|
"testing"
|
|
|
|
"gvisor.googlesource.com/gvisor/pkg/abi"
|
|
"gvisor.googlesource.com/gvisor/pkg/sentry/arch"
|
|
)
|
|
|
|
const (
|
|
maxTestSyscall = 1000
|
|
)
|
|
|
|
func createSyscallTable() *SyscallTable {
|
|
m := make(map[uintptr]SyscallFn)
|
|
for i := uintptr(0); i <= maxTestSyscall; i++ {
|
|
j := i
|
|
m[i] = func(*Task, arch.SyscallArguments) (uintptr, *SyscallControl, error) {
|
|
return j, nil, nil
|
|
}
|
|
}
|
|
|
|
s := &SyscallTable{
|
|
OS: abi.Linux,
|
|
Arch: arch.AMD64,
|
|
Table: m,
|
|
}
|
|
|
|
RegisterSyscallTable(s)
|
|
return s
|
|
}
|
|
|
|
func TestTable(t *testing.T) {
|
|
table := createSyscallTable()
|
|
defer func() {
|
|
// Cleanup registered tables to keep tests separate.
|
|
allSyscallTables = []*SyscallTable{}
|
|
}()
|
|
|
|
// Go through all functions and check that they return the right value.
|
|
for i := uintptr(0); i < maxTestSyscall; i++ {
|
|
fn := table.Lookup(i)
|
|
if fn == nil {
|
|
t.Errorf("Syscall %v is set to nil", i)
|
|
continue
|
|
}
|
|
|
|
v, _, _ := fn(nil, arch.SyscallArguments{})
|
|
if v != i {
|
|
t.Errorf("Wrong return value for syscall %v: expected %v, got %v", i, i, v)
|
|
}
|
|
}
|
|
|
|
// Check that values outside the range return nil.
|
|
for i := uintptr(maxTestSyscall + 1); i < maxTestSyscall+100; i++ {
|
|
fn := table.Lookup(i)
|
|
if fn != nil {
|
|
t.Errorf("Syscall %v is not nil: %v", i, fn)
|
|
continue
|
|
}
|
|
}
|
|
}
|
|
|
|
func BenchmarkTableLookup(b *testing.B) {
|
|
table := createSyscallTable()
|
|
|
|
b.ResetTimer()
|
|
|
|
j := uintptr(0)
|
|
for i := 0; i < b.N; i++ {
|
|
table.Lookup(j)
|
|
j = (j + 1) % 310
|
|
}
|
|
|
|
b.StopTimer()
|
|
// Cleanup registered tables to keep tests separate.
|
|
allSyscallTables = []*SyscallTable{}
|
|
}
|
|
|
|
func BenchmarkTableMapLookup(b *testing.B) {
|
|
table := createSyscallTable()
|
|
|
|
b.ResetTimer()
|
|
|
|
j := uintptr(0)
|
|
for i := 0; i < b.N; i++ {
|
|
table.mapLookup(j)
|
|
j = (j + 1) % 310
|
|
}
|
|
|
|
b.StopTimer()
|
|
// Cleanup registered tables to keep tests separate.
|
|
allSyscallTables = []*SyscallTable{}
|
|
}
|