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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"
)
var (
globalMu sync.Mutex
globalRWMu sync.RWMutex
)
var globalStruct struct {
mu sync.Mutex
// +checklocks:mu
guardedField int
}
var otherStruct struct {
// +checklocks:globalMu
guardedField1 int
// +checklocks:globalRWMu
guardedField2 int
// +checklocks:globalStruct.mu
guardedField3 int
}
func testGlobalValid() {
globalMu.Lock()
otherStruct.guardedField1 = 1
globalMu.Unlock()
globalRWMu.Lock()
otherStruct.guardedField2 = 1
globalRWMu.Unlock()
globalRWMu.RLock()
_ = otherStruct.guardedField2
globalRWMu.RUnlock()
globalStruct.mu.Lock()
globalStruct.guardedField = 1
otherStruct.guardedField3 = 1
globalStruct.mu.Unlock()
}
// +checklocks:globalStruct.mu
func testGlobalValidPreconditions0() {
globalStruct.guardedField = 1
}
// +checklocks:globalMu
func testGlobalValidPreconditions1() {
otherStruct.guardedField1 = 1
}
// +checklocks:globalRWMu
func testGlobalValidPreconditions2() {
otherStruct.guardedField2 = 1
}
// +checklocks:globalStruct.mu
func testGlobalValidPreconditions3() {
otherStruct.guardedField3 = 1
}
func testGlobalInvalid() {
globalStruct.guardedField = 1 // +checklocksfail
otherStruct.guardedField1 = 1 // +checklocksfail
otherStruct.guardedField2 = 1 // +checklocksfail
otherStruct.guardedField3 = 1 // +checklocksfail
}
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