mirror of
https://github.com/netbirdio/gvisor.git
synced 2026-05-22 17:12:49 -07:00
Etienne Perot
44e2d0fcfe
This will be used to plumb the syscall number through to a counter metric that exports the number of times an unimplemented syscall has been called. Plenty of syscall implementations call `EmitUnimplementedEvent` for flags and settings that are not implemented. With `sysno` available, they will be able to plumb that bit of information through. PiperOrigin-RevId: 518635831
111 lines
2.4 KiB
Go
111 lines
2.4 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package kernel
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import (
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"testing"
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"gvisor.dev/gvisor/pkg/abi"
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"gvisor.dev/gvisor/pkg/sentry/arch"
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)
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const (
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maxTestSyscall = 1000
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)
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func createSyscallTable() *SyscallTable {
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m := make(map[uintptr]Syscall)
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for i := uintptr(0); i <= maxTestSyscall; i++ {
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j := i
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m[i] = Syscall{
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Fn: func(t *Task, sysno uintptr, args arch.SyscallArguments) (uintptr, *SyscallControl, error) {
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return j, nil, nil
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},
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}
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}
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s := &SyscallTable{
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OS: abi.Linux,
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Arch: arch.AMD64,
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Table: m,
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}
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RegisterSyscallTable(s)
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return s
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}
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func TestTable(t *testing.T) {
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table := createSyscallTable()
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defer func() {
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// Cleanup registered tables to keep tests separate.
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allSyscallTables = []*SyscallTable{}
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}()
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// Go through all functions and check that they return the right value.
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for i := uintptr(0); i < maxTestSyscall; i++ {
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fn := table.Lookup(i)
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if fn == nil {
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t.Errorf("Syscall %v is set to nil", i)
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continue
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}
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v, _, _ := fn(nil, i, arch.SyscallArguments{})
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if v != i {
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t.Errorf("Wrong return value for syscall %v: expected %v, got %v", i, i, v)
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}
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}
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// Check that values outside the range return nil.
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for i := uintptr(maxTestSyscall + 1); i < maxTestSyscall+100; i++ {
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fn := table.Lookup(i)
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if fn != nil {
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t.Errorf("Syscall %v is not nil: %v", i, fn)
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continue
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}
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}
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}
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func BenchmarkTableLookup(b *testing.B) {
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table := createSyscallTable()
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b.ResetTimer()
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j := uintptr(0)
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for i := 0; i < b.N; i++ {
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table.Lookup(j)
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j = (j + 1) % 310
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}
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b.StopTimer()
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// Cleanup registered tables to keep tests separate.
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allSyscallTables = []*SyscallTable{}
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}
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func BenchmarkTableMapLookup(b *testing.B) {
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table := createSyscallTable()
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b.ResetTimer()
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j := uintptr(0)
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for i := 0; i < b.N; i++ {
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table.mapLookup(j)
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j = (j + 1) % 310
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}
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b.StopTimer()
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// Cleanup registered tables to keep tests separate.
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allSyscallTables = []*SyscallTable{}
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}
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