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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be | 
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. | 
| 4 | 4 | 
| 5 #include "base/debug/leak_tracker.h" | 5 #include "base/debug/leak_tracker.h" | 
| 6 #include "base/memory/scoped_ptr.h" | 6 | 
|  | 7 #include <memory> | 
|  | 8 | 
| 7 #include "testing/gtest/include/gtest/gtest.h" | 9 #include "testing/gtest/include/gtest/gtest.h" | 
| 8 | 10 | 
| 9 namespace base { | 11 namespace base { | 
| 10 namespace debug { | 12 namespace debug { | 
| 11 | 13 | 
| 12 namespace { | 14 namespace { | 
| 13 | 15 | 
| 14 class ClassA { | 16 class ClassA { | 
| 15  private: | 17  private: | 
| 16   LeakTracker<ClassA> leak_tracker_; | 18   LeakTracker<ClassA> leak_tracker_; | 
| 17 }; | 19 }; | 
| 18 | 20 | 
| 19 class ClassB { | 21 class ClassB { | 
| 20  private: | 22  private: | 
| 21   LeakTracker<ClassB> leak_tracker_; | 23   LeakTracker<ClassB> leak_tracker_; | 
| 22 }; | 24 }; | 
| 23 | 25 | 
| 24 #ifndef ENABLE_LEAK_TRACKER | 26 #ifndef ENABLE_LEAK_TRACKER | 
| 25 | 27 | 
| 26 // If leak tracking is disabled, we should do nothing. | 28 // If leak tracking is disabled, we should do nothing. | 
| 27 TEST(LeakTrackerTest, NotEnabled) { | 29 TEST(LeakTrackerTest, NotEnabled) { | 
| 28   EXPECT_EQ(-1, LeakTracker<ClassA>::NumLiveInstances()); | 30   EXPECT_EQ(-1, LeakTracker<ClassA>::NumLiveInstances()); | 
| 29   EXPECT_EQ(-1, LeakTracker<ClassB>::NumLiveInstances()); | 31   EXPECT_EQ(-1, LeakTracker<ClassB>::NumLiveInstances()); | 
| 30 | 32 | 
| 31   // Use scoped_ptr so compiler doesn't complain about unused variables. | 33   // Use scoped_ptr so compiler doesn't complain about unused variables. | 
| 32   scoped_ptr<ClassA> a1(new ClassA); | 34   std::unique_ptr<ClassA> a1(new ClassA); | 
| 33   scoped_ptr<ClassB> b1(new ClassB); | 35   std::unique_ptr<ClassB> b1(new ClassB); | 
| 34   scoped_ptr<ClassB> b2(new ClassB); | 36   std::unique_ptr<ClassB> b2(new ClassB); | 
| 35 | 37 | 
| 36   EXPECT_EQ(-1, LeakTracker<ClassA>::NumLiveInstances()); | 38   EXPECT_EQ(-1, LeakTracker<ClassA>::NumLiveInstances()); | 
| 37   EXPECT_EQ(-1, LeakTracker<ClassB>::NumLiveInstances()); | 39   EXPECT_EQ(-1, LeakTracker<ClassB>::NumLiveInstances()); | 
| 38 } | 40 } | 
| 39 | 41 | 
| 40 #else | 42 #else | 
| 41 | 43 | 
| 42 TEST(LeakTrackerTest, Basic) { | 44 TEST(LeakTrackerTest, Basic) { | 
| 43   { | 45   { | 
| 44     ClassA a1; | 46     ClassA a1; | 
| 45 | 47 | 
| 46     EXPECT_EQ(1, LeakTracker<ClassA>::NumLiveInstances()); | 48     EXPECT_EQ(1, LeakTracker<ClassA>::NumLiveInstances()); | 
| 47     EXPECT_EQ(0, LeakTracker<ClassB>::NumLiveInstances()); | 49     EXPECT_EQ(0, LeakTracker<ClassB>::NumLiveInstances()); | 
| 48 | 50 | 
| 49     ClassB b1; | 51     ClassB b1; | 
| 50     ClassB b2; | 52     ClassB b2; | 
| 51 | 53 | 
| 52     EXPECT_EQ(1, LeakTracker<ClassA>::NumLiveInstances()); | 54     EXPECT_EQ(1, LeakTracker<ClassA>::NumLiveInstances()); | 
| 53     EXPECT_EQ(2, LeakTracker<ClassB>::NumLiveInstances()); | 55     EXPECT_EQ(2, LeakTracker<ClassB>::NumLiveInstances()); | 
| 54 | 56 | 
| 55     scoped_ptr<ClassA> a2(new ClassA); | 57     std::unique_ptr<ClassA> a2(new ClassA); | 
| 56 | 58 | 
| 57     EXPECT_EQ(2, LeakTracker<ClassA>::NumLiveInstances()); | 59     EXPECT_EQ(2, LeakTracker<ClassA>::NumLiveInstances()); | 
| 58     EXPECT_EQ(2, LeakTracker<ClassB>::NumLiveInstances()); | 60     EXPECT_EQ(2, LeakTracker<ClassB>::NumLiveInstances()); | 
| 59 | 61 | 
| 60     a2.reset(); | 62     a2.reset(); | 
| 61 | 63 | 
| 62     EXPECT_EQ(1, LeakTracker<ClassA>::NumLiveInstances()); | 64     EXPECT_EQ(1, LeakTracker<ClassA>::NumLiveInstances()); | 
| 63     EXPECT_EQ(2, LeakTracker<ClassB>::NumLiveInstances()); | 65     EXPECT_EQ(2, LeakTracker<ClassB>::NumLiveInstances()); | 
| 64   } | 66   } | 
| 65 | 67 | 
| 66   EXPECT_EQ(0, LeakTracker<ClassA>::NumLiveInstances()); | 68   EXPECT_EQ(0, LeakTracker<ClassA>::NumLiveInstances()); | 
| 67   EXPECT_EQ(0, LeakTracker<ClassB>::NumLiveInstances()); | 69   EXPECT_EQ(0, LeakTracker<ClassB>::NumLiveInstances()); | 
| 68 } | 70 } | 
| 69 | 71 | 
| 70 // Try some orderings of create/remove to hit different cases in the linked-list | 72 // Try some orderings of create/remove to hit different cases in the linked-list | 
| 71 // assembly. | 73 // assembly. | 
| 72 TEST(LeakTrackerTest, LinkedList) { | 74 TEST(LeakTrackerTest, LinkedList) { | 
| 73   EXPECT_EQ(0, LeakTracker<ClassB>::NumLiveInstances()); | 75   EXPECT_EQ(0, LeakTracker<ClassB>::NumLiveInstances()); | 
| 74 | 76 | 
| 75   scoped_ptr<ClassA> a1(new ClassA); | 77   std::unique_ptr<ClassA> a1(new ClassA); | 
| 76   scoped_ptr<ClassA> a2(new ClassA); | 78   std::unique_ptr<ClassA> a2(new ClassA); | 
| 77   scoped_ptr<ClassA> a3(new ClassA); | 79   std::unique_ptr<ClassA> a3(new ClassA); | 
| 78   scoped_ptr<ClassA> a4(new ClassA); | 80   std::unique_ptr<ClassA> a4(new ClassA); | 
| 79 | 81 | 
| 80   EXPECT_EQ(4, LeakTracker<ClassA>::NumLiveInstances()); | 82   EXPECT_EQ(4, LeakTracker<ClassA>::NumLiveInstances()); | 
| 81 | 83 | 
| 82   // Remove the head of the list (a1). | 84   // Remove the head of the list (a1). | 
| 83   a1.reset(); | 85   a1.reset(); | 
| 84   EXPECT_EQ(3, LeakTracker<ClassA>::NumLiveInstances()); | 86   EXPECT_EQ(3, LeakTracker<ClassA>::NumLiveInstances()); | 
| 85 | 87 | 
| 86   // Remove the tail of the list (a4). | 88   // Remove the tail of the list (a4). | 
| 87   a4.reset(); | 89   a4.reset(); | 
| 88   EXPECT_EQ(2, LeakTracker<ClassA>::NumLiveInstances()); | 90   EXPECT_EQ(2, LeakTracker<ClassA>::NumLiveInstances()); | 
| 89 | 91 | 
| 90   // Append to the new tail of the list (a3). | 92   // Append to the new tail of the list (a3). | 
| 91   scoped_ptr<ClassA> a5(new ClassA); | 93   std::unique_ptr<ClassA> a5(new ClassA); | 
| 92   EXPECT_EQ(3, LeakTracker<ClassA>::NumLiveInstances()); | 94   EXPECT_EQ(3, LeakTracker<ClassA>::NumLiveInstances()); | 
| 93 | 95 | 
| 94   a2.reset(); | 96   a2.reset(); | 
| 95   a3.reset(); | 97   a3.reset(); | 
| 96 | 98 | 
| 97   EXPECT_EQ(1, LeakTracker<ClassA>::NumLiveInstances()); | 99   EXPECT_EQ(1, LeakTracker<ClassA>::NumLiveInstances()); | 
| 98 | 100 | 
| 99   a5.reset(); | 101   a5.reset(); | 
| 100   EXPECT_EQ(0, LeakTracker<ClassA>::NumLiveInstances()); | 102   EXPECT_EQ(0, LeakTracker<ClassA>::NumLiveInstances()); | 
| 101 } | 103 } | 
| 102 | 104 | 
| 103 TEST(LeakTrackerTest, NoOpCheckForLeaks) { | 105 TEST(LeakTrackerTest, NoOpCheckForLeaks) { | 
| 104   // There are no live instances of ClassA, so this should do nothing. | 106   // There are no live instances of ClassA, so this should do nothing. | 
| 105   LeakTracker<ClassA>::CheckForLeaks(); | 107   LeakTracker<ClassA>::CheckForLeaks(); | 
| 106 } | 108 } | 
| 107 | 109 | 
| 108 #endif  // ENABLE_LEAK_TRACKER | 110 #endif  // ENABLE_LEAK_TRACKER | 
| 109 | 111 | 
| 110 }  // namespace | 112 }  // namespace | 
| 111 | 113 | 
| 112 }  // namespace debug | 114 }  // namespace debug | 
| 113 }  // namespace base | 115 }  // namespace base | 
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