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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"
)
func testLockedAccessValid(tc *oneGuardStruct) {
tc.mu.Lock()
tc.guardedField = 1
tc.mu.Unlock()
}
func testLockedAccessIgnore(tc *oneGuardStruct) {
tc.mu.Lock()
tc.unguardedField = 1
tc.mu.Unlock()
}
func testUnlockedAccessInvalidWrite(tc *oneGuardStruct) {
tc.guardedField = 2 // +checklocksfail
}
func testUnlockedAccessInvalidRead(tc *oneGuardStruct) {
x := tc.guardedField // +checklocksfail
_ = x
}
func testUnlockedAccessValid(tc *oneGuardStruct) {
tc.unguardedField = 2
}
func testCallValidAccess(tc *oneGuardStruct) {
callValidAccess(tc)
}
func callValidAccess(tc *oneGuardStruct) {
tc.mu.Lock()
tc.guardedField = 1
tc.mu.Unlock()
}
func testCallValueMixup(tc *oneGuardStruct) {
callValueMixup(tc, tc)
}
func callValueMixup(tc1, tc2 *oneGuardStruct) {
tc1.mu.Lock()
tc2.guardedField = 2 // +checklocksfail
tc1.mu.Unlock()
}
func testCallPreconditionsInvalid(tc *oneGuardStruct) {
callPreconditions(tc) // +checklocksfail
}
func testCallPreconditionsValid(tc *oneGuardStruct) {
tc.mu.Lock()
callPreconditions(tc)
tc.mu.Unlock()
}
// +checklocks:tc.mu
func callPreconditions(tc *oneGuardStruct) {
tc.guardedField = 1
}
type nestedFieldsStruct struct {
mu sync.Mutex
// +checklocks:mu
nestedStruct struct {
nested1 int
nested2 int
}
}
func testNestedGuardValid(tc *nestedFieldsStruct) {
tc.mu.Lock()
tc.nestedStruct.nested1 = 1
tc.nestedStruct.nested2 = 2
tc.mu.Unlock()
}
func testNestedGuardInvalid(tc *nestedFieldsStruct) {
tc.nestedStruct.nested1 = 1 // +checklocksfail
}
type rwGuardStruct struct {
rwMu sync.RWMutex
// +checklocks:rwMu
guardedField int
}
func testRWValidRead(tc *rwGuardStruct) {
tc.rwMu.Lock()
tc.guardedField = 1
tc.rwMu.Unlock()
}
func testRWValidWrite(tc *rwGuardStruct) {
tc.rwMu.RLock()
tc.guardedField = 2
tc.rwMu.RUnlock()
}
func testRWInvalidWrite(tc *rwGuardStruct) {
tc.guardedField = 3 // +checklocksfail
}
func testRWInvalidRead(tc *rwGuardStruct) {
x := tc.guardedField + 3 // +checklocksfail
_ = x
}
func testTwoLocksDoubleGuardStructValid(tc *twoLocksDoubleGuardStruct) {
tc.mu.Lock()
tc.secondMu.Lock()
tc.doubleGuardedField = 1
tc.secondMu.Unlock()
}
func testTwoLocksDoubleGuardStructOnlyOne(tc *twoLocksDoubleGuardStruct) {
tc.mu.Lock()
tc.doubleGuardedField = 2 // +checklocksfail
tc.mu.Unlock()
}
func testTwoLocksDoubleGuardStructInvalid(tc *twoLocksDoubleGuardStruct) {
tc.doubleGuardedField = 3 // +checklocksfail:2
}
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