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// Copyright 2020 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 test
import (
"sync"
"sync/atomic"
)
type atomicStruct struct {
accessedNormally int32
// +checkatomic
accessedAtomically int32
// +checklocksignore
ignored int32
}
func testNormalAccess(tc *atomicStruct, v chan int32, p chan *int32) {
v <- tc.accessedNormally
p <- &tc.accessedNormally
}
func testAtomicAccess(tc *atomicStruct, v chan int32) {
v <- atomic.LoadInt32(&tc.accessedAtomically)
}
func testAtomicAccessInvalid(tc *atomicStruct, v chan int32) {
v <- atomic.LoadInt32(&tc.accessedNormally) // +checklocksfail
}
func testNormalAccessInvalid(tc *atomicStruct, v chan int32, p chan *int32) {
v <- tc.accessedAtomically // +checklocksfail
p <- &tc.accessedAtomically // +checklocksfail
}
func testIgnored(tc *atomicStruct, v chan int32, p chan *int32) {
v <- atomic.LoadInt32(&tc.ignored)
v <- tc.ignored
p <- &tc.ignored
}
type atomicMixedStruct struct {
mu sync.Mutex
// +checkatomic
// +checklocks:mu
accessedMixed int32
}
func testAtomicMixedValidRead(tc *atomicMixedStruct, v chan int32) {
v <- atomic.LoadInt32(&tc.accessedMixed)
}
func testAtomicMixedInvalidRead(tc *atomicMixedStruct, v chan int32, p chan *int32) {
v <- tc.accessedMixed // +checklocksfail
p <- &tc.accessedMixed // +checklocksfail
}
func testAtomicMixedValidLockedWrite(tc *atomicMixedStruct, v chan int32, p chan *int32) {
tc.mu.Lock()
atomic.StoreInt32(&tc.accessedMixed, 1)
tc.mu.Unlock()
}
func testAtomicMixedInvalidLockedWrite(tc *atomicMixedStruct, v chan int32, p chan *int32) {
tc.mu.Lock()
tc.accessedMixed = 1 // +checklocksfail:2
tc.mu.Unlock()
}
func testAtomicMixedInvalidAtomicWrite(tc *atomicMixedStruct, v chan int32, p chan *int32) {
atomic.StoreInt32(&tc.accessedMixed, 1) // +checklocksfail
}
func testAtomicMixedInvalidWrite(tc *atomicMixedStruct, v chan int32, p chan *int32) {
tc.accessedMixed = 1 // +checklocksfail:2
}
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