diff options
Diffstat (limited to 'pkg/ring0/pagetables/pagetables_test.go')
| -rw-r--r-- | pkg/ring0/pagetables/pagetables_test.go | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/pkg/ring0/pagetables/pagetables_test.go b/pkg/ring0/pagetables/pagetables_test.go deleted file mode 100644 index df93dcb6a..000000000 --- a/pkg/ring0/pagetables/pagetables_test.go +++ /dev/null @@ -1,156 +0,0 @@ -// 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 pagetables - -import ( - "gvisor.dev/gvisor/pkg/hostarch" - "testing" -) - -type mapping struct { - start uintptr - length uintptr - addr uintptr - opts MapOpts -} - -type checkVisitor struct { - expected []mapping // Input. - current int // Temporary. - found []mapping // Output. - failed string // Output. -} - -func (v *checkVisitor) visit(start uintptr, pte *PTE, align uintptr) bool { - v.found = append(v.found, mapping{ - start: start, - length: align + 1, - addr: pte.Address(), - opts: pte.Opts(), - }) - if v.failed != "" { - // Don't keep looking for errors. - return false - } - - if v.current >= len(v.expected) { - v.failed = "more mappings than expected" - } else if v.expected[v.current].start != start { - v.failed = "start didn't match expected" - } else if v.expected[v.current].length != (align + 1) { - v.failed = "end didn't match expected" - } else if v.expected[v.current].addr != pte.Address() { - v.failed = "address didn't match expected" - } else if v.expected[v.current].opts != pte.Opts() { - v.failed = "opts didn't match" - } - v.current++ - return true -} - -func (*checkVisitor) requiresAlloc() bool { return false } - -func (*checkVisitor) requiresSplit() bool { return false } - -func checkMappings(t *testing.T, pt *PageTables, m []mapping) { - // Iterate over all the mappings. - w := checkWalker{ - pageTables: pt, - visitor: checkVisitor{ - expected: m, - }, - } - w.iterateRange(0, ^uintptr(0)) - - // Were we expected additional mappings? - if w.visitor.failed == "" && w.visitor.current != len(w.visitor.expected) { - w.visitor.failed = "insufficient mappings found" - } - - // Emit a meaningful error message on failure. - if w.visitor.failed != "" { - t.Errorf("%s; got %#v, wanted %#v", w.visitor.failed, w.visitor.found, w.visitor.expected) - } -} - -func TestUnmap(t *testing.T) { - pt := New(NewRuntimeAllocator()) - - // Map and unmap one entry. - pt.Map(0x400000, pteSize, MapOpts{AccessType: hostarch.ReadWrite}, pteSize*42) - pt.Unmap(0x400000, pteSize) - - checkMappings(t, pt, nil) -} - -func TestReadOnly(t *testing.T) { - pt := New(NewRuntimeAllocator()) - - // Map one entry. - pt.Map(0x400000, pteSize, MapOpts{AccessType: hostarch.Read}, pteSize*42) - - checkMappings(t, pt, []mapping{ - {0x400000, pteSize, pteSize * 42, MapOpts{AccessType: hostarch.Read}}, - }) -} - -func TestReadWrite(t *testing.T) { - pt := New(NewRuntimeAllocator()) - - // Map one entry. - pt.Map(0x400000, pteSize, MapOpts{AccessType: hostarch.ReadWrite}, pteSize*42) - - checkMappings(t, pt, []mapping{ - {0x400000, pteSize, pteSize * 42, MapOpts{AccessType: hostarch.ReadWrite}}, - }) -} - -func TestSerialEntries(t *testing.T) { - pt := New(NewRuntimeAllocator()) - - // Map two sequential entries. - pt.Map(0x400000, pteSize, MapOpts{AccessType: hostarch.ReadWrite}, pteSize*42) - pt.Map(0x401000, pteSize, MapOpts{AccessType: hostarch.ReadWrite}, pteSize*47) - - checkMappings(t, pt, []mapping{ - {0x400000, pteSize, pteSize * 42, MapOpts{AccessType: hostarch.ReadWrite}}, - {0x401000, pteSize, pteSize * 47, MapOpts{AccessType: hostarch.ReadWrite}}, - }) -} - -func TestSpanningEntries(t *testing.T) { - pt := New(NewRuntimeAllocator()) - - // Span a pgd with two pages. - pt.Map(0x00007efffffff000, 2*pteSize, MapOpts{AccessType: hostarch.Read}, pteSize*42) - - checkMappings(t, pt, []mapping{ - {0x00007efffffff000, pteSize, pteSize * 42, MapOpts{AccessType: hostarch.Read}}, - {0x00007f0000000000, pteSize, pteSize * 43, MapOpts{AccessType: hostarch.Read}}, - }) -} - -func TestSparseEntries(t *testing.T) { - pt := New(NewRuntimeAllocator()) - - // Map two entries in different pgds. - pt.Map(0x400000, pteSize, MapOpts{AccessType: hostarch.ReadWrite}, pteSize*42) - pt.Map(0x00007f0000000000, pteSize, MapOpts{AccessType: hostarch.Read}, pteSize*47) - - checkMappings(t, pt, []mapping{ - {0x400000, pteSize, pteSize * 42, MapOpts{AccessType: hostarch.ReadWrite}}, - {0x00007f0000000000, pteSize, pteSize * 47, MapOpts{AccessType: hostarch.Read}}, - }) -} |