mirror of
https://github.com/hanzoai/visor.git
synced 2026-09-24 17:04:14 +00:00
Tao Lin
a9f716e19e
- Update copyright year to 2026 for all new files - Update comment in hostarch_arm64.go to mention 64K page support via pagesize_64k build tag - Add PageSize checks in KVM and Systrap New() constructors to fail early on non-4K page sizes
86 lines
2.3 KiB
Go
86 lines
2.3 KiB
Go
// Copyright 2026 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 pagetables
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import (
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"testing"
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)
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type mapping struct {
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start uintptr
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length uintptr
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addr uintptr
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opts MapOpts
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}
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type checkVisitor struct {
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expected []mapping // Input.
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current int // Temporary.
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found []mapping // Output.
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failed string // Output.
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}
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func (v *checkVisitor) visit(start uintptr, pte *PTE, align uintptr) bool {
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v.found = append(v.found, mapping{
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start: start,
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length: align + 1,
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addr: pte.Address(),
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opts: pte.Opts(),
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})
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if v.failed != "" {
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// Don't keep looking for errors.
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return false
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}
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if v.current >= len(v.expected) {
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v.failed = "more mappings than expected"
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} else if v.expected[v.current].start != start {
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v.failed = "start didn't match expected"
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} else if v.expected[v.current].length != (align + 1) {
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v.failed = "end didn't match expected"
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} else if v.expected[v.current].addr != pte.Address() {
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v.failed = "address didn't match expected"
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} else if v.expected[v.current].opts != pte.Opts() {
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v.failed = "opts didn't match"
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}
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v.current++
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return true
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}
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func (*checkVisitor) requiresAlloc() bool { return false }
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func (*checkVisitor) requiresSplit() bool { return false }
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func checkMappings(t *testing.T, pt *PageTables, m []mapping) {
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// Iterate over all the mappings.
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w := checkWalker{
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pageTables: pt,
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visitor: checkVisitor{
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expected: m,
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},
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}
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w.iterateRange(0, ^uintptr(0))
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// Were we expected additional mappings?
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if w.visitor.failed == "" && w.visitor.current != len(w.visitor.expected) {
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w.visitor.failed = "insufficient mappings found"
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}
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// Emit a meaningful error message on failure.
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if w.visitor.failed != "" {
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t.Errorf("%s; got %#v, wanted %#v", w.visitor.failed, w.visitor.found, w.visitor.expected)
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}
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}
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