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