79 lines
2.1 KiB
Go
79 lines
2.1 KiB
Go
// Copyright 2018 Google Inc.
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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 kvm
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import (
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"syscall"
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"testing"
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"gvisor.googlesource.com/gvisor/pkg/sentry/usermem"
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)
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type checker struct {
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ok bool
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}
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func (c *checker) Contains(addr uintptr) func(virtualRegion) {
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c.ok = false // Reset for below calls.
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return func(vr virtualRegion) {
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if vr.virtual <= addr && addr < vr.virtual+vr.length {
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c.ok = true
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}
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}
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}
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func TestParseMaps(t *testing.T) {
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c := new(checker)
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// Simple test.
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if err := applyVirtualRegions(c.Contains(0)); err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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// MMap a new page.
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addr, _, errno := syscall.RawSyscall6(
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syscall.SYS_MMAP, 0, usermem.PageSize,
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syscall.PROT_READ|syscall.PROT_WRITE,
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syscall.MAP_ANONYMOUS|syscall.MAP_PRIVATE, 0, 0)
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if errno != 0 {
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t.Fatalf("unexpected map error: %v", errno)
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}
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// Re-parse maps.
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if err := applyVirtualRegions(c.Contains(addr)); err != nil {
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syscall.RawSyscall(syscall.SYS_MUNMAP, addr, usermem.PageSize, 0)
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t.Fatalf("unexpected error: %v", err)
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}
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// Assert that it now does contain the region.
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if !c.ok {
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syscall.RawSyscall(syscall.SYS_MUNMAP, addr, usermem.PageSize, 0)
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t.Fatalf("updated map does not contain 0x%08x, expected true", addr)
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}
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// Unmap the region.
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syscall.RawSyscall(syscall.SYS_MUNMAP, addr, usermem.PageSize, 0)
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// Re-parse maps.
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if err := applyVirtualRegions(c.Contains(addr)); err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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// Assert that it once again does _not_ contain the region.
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if c.ok {
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t.Fatalf("final map does contain 0x%08x, expected false", addr)
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}
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}
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