96 lines
2.5 KiB
Go
96 lines
2.5 KiB
Go
// Copyright 2020 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 escape
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import (
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"gvisor.dev/gvisor/pkg/usermem"
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"gvisor.dev/gvisor/tools/go_marshal/marshal"
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"gvisor.dev/gvisor/tools/go_marshal/test"
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)
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// dummyTask implements marshal.Task.
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type dummyTask struct {
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}
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func (*dummyTask) CopyScratchBuffer(size int) []byte {
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return make([]byte, size)
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}
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func (*dummyTask) CopyOutBytes(addr usermem.Addr, b []byte) (int, error) {
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return len(b), nil
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}
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func (*dummyTask) CopyInBytes(addr usermem.Addr, b []byte) (int, error) {
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return len(b), nil
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}
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func (t *dummyTask) MarshalBytes(addr usermem.Addr, marshallable marshal.Marshallable) {
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buf := t.CopyScratchBuffer(marshallable.SizeBytes())
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marshallable.MarshalBytes(buf)
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t.CopyOutBytes(addr, buf)
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}
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func (t *dummyTask) MarshalUnsafe(addr usermem.Addr, marshallable marshal.Marshallable) {
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buf := t.CopyScratchBuffer(marshallable.SizeBytes())
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marshallable.MarshalUnsafe(buf)
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t.CopyOutBytes(addr, buf)
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}
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// +checkescape:all
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//go:nosplit
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func doCopyIn(t *dummyTask) {
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var stat test.Stat
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stat.CopyIn(t, usermem.Addr(0xf000ba12))
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}
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// +checkescape:all
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//go:nosplit
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func doCopyOut(t *dummyTask) {
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var stat test.Stat
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stat.CopyOut(t, usermem.Addr(0xf000ba12))
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}
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// +mustescape:builtin
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// +mustescape:stack
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func doMarshalBytesDirect(t *dummyTask) {
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var stat test.Stat
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buf := t.CopyScratchBuffer(stat.SizeBytes())
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stat.MarshalBytes(buf)
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t.CopyOutBytes(usermem.Addr(0xf000ba12), buf)
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}
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// +mustescape:builtin
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// +mustescape:stack
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func doMarshalUnsafeDirect(t *dummyTask) {
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var stat test.Stat
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buf := t.CopyScratchBuffer(stat.SizeBytes())
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stat.MarshalUnsafe(buf)
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t.CopyOutBytes(usermem.Addr(0xf000ba12), buf)
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}
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// +mustescape:local,heap
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// +mustescape:stack
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func doMarshalBytesViaMarshallable(t *dummyTask) {
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var stat test.Stat
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t.MarshalBytes(usermem.Addr(0xf000ba12), &stat)
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}
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// +mustescape:local,heap
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// +mustescape:stack
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func doMarshalUnsafeViaMarshallable(t *dummyTask) {
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var stat test.Stat
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t.MarshalUnsafe(usermem.Addr(0xf000ba12), &stat)
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}
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