1 files changed, 0 insertions, 362 deletions
diff --git a/tools/checklocks/test/test.go b/tools/checklocks/test/test.go
deleted file mode 100644
index 05693c183..000000000
--- a/tools/checklocks/test/test.go
+++ /dev/null
@@ -1,362 +0,0 @@
-// 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 is a test package.
-package test
-
-import (
-	"math/rand"
-	"sync"
-)
-
-type oneGuarded struct {
-	mu sync.Mutex
-	// +checklocks:mu
-	guardedField int
-
-	unguardedField int
-}
-
-func testAccessOne() {
-	var tc oneGuarded
-	// Valid access
-	tc.mu.Lock()
-	tc.guardedField = 1
-	tc.unguardedField = 1
-	tc.mu.Unlock()
-
-	// Valid access as unguarded field is not protected by mu.
-	tc.unguardedField = 2
-
-	// Invalid access
-	tc.guardedField = 2 // +checklocksfail
-
-	// Invalid read of a guarded field.
-	x := tc.guardedField // +checklocksfail
-	_ = x
-}
-
-func testFunctionCallsNoParameters() {
-	// Couple of regular function calls with no parameters.
-	funcCallWithValidAccess()
-	funcCallWithInvalidAccess()
-}
-
-func funcCallWithValidAccess() {
-	var tc2 oneGuarded
-	// Valid tc2 access
-	tc2.mu.Lock()
-	tc2.guardedField = 1
-	tc2.mu.Unlock()
-}
-
-func funcCallWithInvalidAccess() {
-	var tc oneGuarded
-	var tc2 oneGuarded
-	// Invalid access, wrong mutex is held.
-	tc.mu.Lock()
-	tc2.guardedField = 2 // +checklocksfail
-	tc.mu.Unlock()
-}
-
-func testParameterPassing() {
-	var tc oneGuarded
-
-	// Valid call where a guardedField is passed to a function as a parameter.
-	tc.mu.Lock()
-	nestedWithGuardByAddr(&tc.guardedField, &tc.unguardedField)
-	tc.mu.Unlock()
-
-	// Invalid call where a guardedField is passed to a function as a parameter
-	// without holding locks.
-	nestedWithGuardByAddr(&tc.guardedField, &tc.unguardedField) // +checklocksfail
-
-	// Valid call where a guardedField is passed to a function as a parameter.
-	tc.mu.Lock()
-	nestedWithGuardByValue(tc.guardedField, tc.unguardedField)
-	tc.mu.Unlock()
-
-	// Invalid call where a guardedField is passed to a function as a parameter
-	// without holding locks.
-	nestedWithGuardByValue(tc.guardedField, tc.unguardedField) // +checklocksfail
-}
-
-func nestedWithGuardByAddr(guardedField, unguardedField *int) {
-	*guardedField = 4
-	*unguardedField = 5
-}
-
-func nestedWithGuardByValue(guardedField, unguardedField int) {
-	// read the fields to keep SA4009 static analyzer happy.
-	_ = guardedField
-	_ = unguardedField
-	guardedField = 4
-	unguardedField = 5
-}
-
-type twoGuarded struct {
-	mu sync.Mutex
-	// +checklocks:mu
-	guardedField1 int
-	// +checklocks:mu
-	guardedField2 int
-}
-
-type twoLocks struct {
-	mu       sync.Mutex
-	secondMu sync.Mutex
-
-	// +checklocks:mu
-	guardedField1 int
-	// +checklocks:secondMu
-	guardedField2 int
-}
-
-type twoLocksDoubleGuard struct {
-	mu       sync.Mutex
-	secondMu sync.Mutex
-
-	// +checklocks:mu
-	// +checklocks:secondMu
-	doubleGuardedField int
-}
-
-func testTwoLocksDoubleGuard() {
-	var tc twoLocksDoubleGuard
-
-	// Double guarded field
-	tc.mu.Lock()
-	tc.secondMu.Lock()
-	tc.doubleGuardedField = 1
-	tc.secondMu.Unlock()
-
-	// This should fail as we released the secondMu.
-	tc.doubleGuardedField = 2 // +checklocksfail
-	tc.mu.Unlock()
-
-	// This should fail as well as now we are not holding any locks.
-	//
-	// This line triggers two failures one for each mutex, hence the 2 after
-	// fail.
-	tc.doubleGuardedField = 3 // +checklocksfail:2
-}
-
-type rwGuarded struct {
-	rwMu sync.RWMutex
-
-	// +checklocks:rwMu
-	rwGuardedField int
-}
-
-func testRWGuarded() {
-	var tc rwGuarded
-
-	// Assignment w/ exclusive lock should pass.
-	tc.rwMu.Lock()
-	tc.rwGuardedField = 1
-	tc.rwMu.Unlock()
-
-	// Assignment w/ RWLock should pass as we don't differentiate between
-	// Lock/RLock.
-	tc.rwMu.RLock()
-	tc.rwGuardedField = 2
-	tc.rwMu.RUnlock()
-
-	// Assignment w/o hold Lock() should fail.
-	tc.rwGuardedField = 3 // +checklocksfail
-
-	// Reading w/o holding lock should fail.
-	x := tc.rwGuardedField + 3 // +checklocksfail
-	_ = x
-}
-
-type nestedFields struct {
-	mu sync.Mutex
-
-	// +checklocks:mu
-	nestedStruct struct {
-		nested1 int
-		nested2 int
-	}
-}
-
-func testNestedStructGuards() {
-	var tc nestedFields
-	// Valid access with mu held.
-	tc.mu.Lock()
-	tc.nestedStruct.nested1 = 1
-	tc.nestedStruct.nested2 = 2
-	tc.mu.Unlock()
-
-	// Invalid access to nested1 wihout holding mu.
-	tc.nestedStruct.nested1 = 1 // +checklocksfail
-}
-
-type testCaseMethods struct {
-	mu sync.Mutex
-
-	// +checklocks:mu
-	guardedField int
-}
-
-func (t *testCaseMethods) Method() {
-	// Valid access
-	t.mu.Lock()
-	t.guardedField = 1
-	t.mu.Unlock()
-
-	// invalid access
-	t.guardedField = 2 // +checklocksfail
-}
-
-// +checklocks:t.mu
-func (t *testCaseMethods) MethodLocked(a, b, c int) {
-	t.guardedField = 3
-}
-
-// +checklocksignore
-func (t *testCaseMethods) IgnoredMethod() {
-	// Invalid access but should not fail as the function is annotated
-	// with "// +checklocksignore"
-	t.guardedField = 2
-}
-
-func testMethodCalls() {
-	var tc2 testCaseMethods
-
-	// Valid use, tc2.Method acquires lock.
-	tc2.Method()
-
-	// Valid access tc2.mu is held before calling tc2.MethodLocked.
-	tc2.mu.Lock()
-	tc2.MethodLocked(1, 2, 3)
-	tc2.mu.Unlock()
-
-	// Invalid access no locks are being held.
-	tc2.MethodLocked(4, 5, 6) // +checklocksfail
-}
-
-type noMutex struct {
-	f int
-	g int
-}
-
-func (n noMutex) method() {
-	n.f = 1
-	n.f = n.g
-}
-
-func testNoMutex() {
-	var n noMutex
-	n.method()
-}
-
-func testMultiple() {
-	var tc1, tc2, tc3 testCaseMethods
-
-	tc1.mu.Lock()
-
-	// Valid access we are holding tc1's lock.
-	tc1.guardedField = 1
-
-	// Invalid access we are not holding tc2 or tc3's lock.
-	tc2.guardedField = 2 // +checklocksfail
-	tc3.guardedField = 3 // +checklocksfail
-	tc1.mu.Unlock()
-}
-
-func testConditionalBranchingLocks() {
-	var tc2 testCaseMethods
-	x := rand.Intn(10)
-	if x%2 == 1 {
-		tc2.mu.Lock()
-	}
-	// This is invalid access as tc2.mu is not held if we never entered
-	// the if block.
-	tc2.guardedField = 1 // +checklocksfail
-
-	var tc3 testCaseMethods
-	if x%2 == 1 {
-		tc3.mu.Lock()
-	} else {
-		tc3.mu.Lock()
-	}
-	// This is valid as tc3.mu is held in if and else blocks.
-	tc3.guardedField = 1
-}
-
-type testMethodWithParams struct {
-	mu sync.Mutex
-
-	// +checklocks:mu
-	guardedField int
-}
-
-type ptrToTestMethodWithParams *testMethodWithParams
-
-// +checklocks:t.mu
-// +checklocks:a.mu
-func (t *testMethodWithParams) methodLockedWithParams(a *testMethodWithParams, b *testMethodWithParams) {
-	t.guardedField = a.guardedField
-	b.guardedField = a.guardedField // +checklocksfail
-}
-
-// +checklocks:t.mu
-// +checklocks:a.mu
-// +checklocks:b.mu
-func (t *testMethodWithParams) methodLockedWithPtrType(a *testMethodWithParams, b ptrToTestMethodWithParams) {
-	t.guardedField = a.guardedField
-	b.guardedField = a.guardedField
-}
-
-// +checklocks:a.mu
-func standaloneFunctionWithGuard(a *testMethodWithParams) {
-	a.guardedField = 1
-	a.mu.Unlock()
-	a.guardedField = 1 // +checklocksfail
-}
-
-type testMethodWithEmbedded struct {
-	mu sync.Mutex
-
-	// +checklocks:mu
-	guardedField int
-	p            *testMethodWithParams
-}
-
-// +checklocks:t.mu
-func (t *testMethodWithEmbedded) DoLocked() {
-	var a, b testMethodWithParams
-	t.guardedField = 1
-	a.mu.Lock()
-	b.mu.Lock()
-	t.p.methodLockedWithParams(&a, &b) // +checklocksfail
-	a.mu.Unlock()
-	b.mu.Unlock()
-}
-
-// UnsupportedLockerExample is a test that verifies that trying to annotate a
-// field that is not a sync.Mutex/RWMutex results in a failure.
-type UnsupportedLockerExample struct {
-	mu sync.Locker
-
-	// +checklocks:mu
-	x int // +checklocksfail
-}
-
-func abc() {
-	var mu sync.Mutex
-	a := UnsupportedLockerExample{mu: &mu}
-	a.x = 1
-}