1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
|
// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_map.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_hash_set.h"
#include "third_party/blink/renderer/platform/heap/collection_support/heap_linked_hash_set.h"
#include "third_party/blink/renderer/platform/heap/heap_test_objects.h"
#include "third_party/blink/renderer/platform/heap/heap_test_utilities.h"
#include "third_party/blink/renderer/platform/heap/persistent.h"
namespace blink {
namespace {
class WeaknessMarkingTest : public TestSupportingGC {};
} // namespace
enum class ObjectLiveness { Alive = 0, Dead };
template <typename Map,
template <typename T>
class KeyHolder,
template <typename T>
class ValueHolder>
void TestMapImpl(ObjectLiveness expected_key_liveness,
ObjectLiveness expected_value_liveness) {
Persistent<Map> map = MakeGarbageCollected<Map>();
KeyHolder<IntegerObject> int_key = MakeGarbageCollected<IntegerObject>(1);
ValueHolder<IntegerObject> int_value = MakeGarbageCollected<IntegerObject>(2);
map->insert(int_key.Get(), int_value.Get());
TestSupportingGC::PreciselyCollectGarbage();
if (expected_key_liveness == ObjectLiveness::Alive) {
EXPECT_TRUE(int_key.Get());
} else {
EXPECT_FALSE(int_key.Get());
}
if (expected_value_liveness == ObjectLiveness::Alive) {
EXPECT_TRUE(int_value.Get());
} else {
EXPECT_FALSE(int_value.Get());
}
EXPECT_EQ(((expected_key_liveness == ObjectLiveness::Alive) &&
(expected_value_liveness == ObjectLiveness::Alive))
? 1u
: 0u,
map->size());
}
TEST_F(WeaknessMarkingTest, WeakToWeakMap) {
using Map =
GCedHeapHashMap<WeakMember<IntegerObject>, WeakMember<IntegerObject>>;
TestMapImpl<Map, Persistent, Persistent>(ObjectLiveness::Alive,
ObjectLiveness::Alive);
TestMapImpl<Map, WeakPersistent, Persistent>(ObjectLiveness::Dead,
ObjectLiveness::Alive);
TestMapImpl<Map, Persistent, WeakPersistent>(ObjectLiveness::Alive,
ObjectLiveness::Dead);
TestMapImpl<Map, WeakPersistent, WeakPersistent>(ObjectLiveness::Dead,
ObjectLiveness::Dead);
}
TEST_F(WeaknessMarkingTest, WeakToStrongMap) {
using Map = GCedHeapHashMap<WeakMember<IntegerObject>, Member<IntegerObject>>;
TestMapImpl<Map, Persistent, Persistent>(ObjectLiveness::Alive,
ObjectLiveness::Alive);
TestMapImpl<Map, WeakPersistent, Persistent>(ObjectLiveness::Dead,
ObjectLiveness::Alive);
TestMapImpl<Map, Persistent, WeakPersistent>(ObjectLiveness::Alive,
ObjectLiveness::Alive);
TestMapImpl<Map, WeakPersistent, WeakPersistent>(ObjectLiveness::Dead,
ObjectLiveness::Dead);
}
TEST_F(WeaknessMarkingTest, StrongToWeakMap) {
using Map = GCedHeapHashMap<Member<IntegerObject>, WeakMember<IntegerObject>>;
TestMapImpl<Map, Persistent, Persistent>(ObjectLiveness::Alive,
ObjectLiveness::Alive);
TestMapImpl<Map, WeakPersistent, Persistent>(ObjectLiveness::Alive,
ObjectLiveness::Alive);
TestMapImpl<Map, Persistent, WeakPersistent>(ObjectLiveness::Alive,
ObjectLiveness::Dead);
TestMapImpl<Map, WeakPersistent, WeakPersistent>(ObjectLiveness::Dead,
ObjectLiveness::Dead);
}
TEST_F(WeaknessMarkingTest, StrongToStrongMap) {
using Map = GCedHeapHashMap<Member<IntegerObject>, Member<IntegerObject>>;
TestMapImpl<Map, Persistent, Persistent>(ObjectLiveness::Alive,
ObjectLiveness::Alive);
TestMapImpl<Map, WeakPersistent, Persistent>(ObjectLiveness::Alive,
ObjectLiveness::Alive);
TestMapImpl<Map, Persistent, WeakPersistent>(ObjectLiveness::Alive,
ObjectLiveness::Alive);
TestMapImpl<Map, WeakPersistent, WeakPersistent>(ObjectLiveness::Alive,
ObjectLiveness::Alive);
}
template <typename Set, template <typename T> class Type>
void TestSetImpl(ObjectLiveness object_liveness) {
Persistent<Set> set = MakeGarbageCollected<Set>();
Type<IntegerObject> object = MakeGarbageCollected<IntegerObject>(1);
set->insert(object.Get());
TestSupportingGC::PreciselyCollectGarbage();
if (object_liveness == ObjectLiveness::Alive) {
EXPECT_TRUE(object.Get());
} else {
EXPECT_FALSE(object.Get());
}
EXPECT_EQ((object_liveness == ObjectLiveness::Alive) ? 1u : 0u, set->size());
}
TEST_F(WeaknessMarkingTest, WeakSet) {
using Set = GCedHeapHashSet<WeakMember<IntegerObject>>;
TestSetImpl<Set, Persistent>(ObjectLiveness::Alive);
TestSetImpl<Set, WeakPersistent>(ObjectLiveness::Dead);
}
TEST_F(WeaknessMarkingTest, StrongSet) {
using Set = GCedHeapHashSet<Member<IntegerObject>>;
TestSetImpl<Set, Persistent>(ObjectLiveness::Alive);
TestSetImpl<Set, WeakPersistent>(ObjectLiveness::Alive);
}
TEST_F(WeaknessMarkingTest, DeadValueInReverseEphemeron) {
using Map = GCedHeapHashMap<Member<IntegerObject>, WeakMember<IntegerObject>>;
Persistent<Map> map = MakeGarbageCollected<Map>();
Persistent<IntegerObject> key = MakeGarbageCollected<IntegerObject>(1);
map->insert(key.Get(), MakeGarbageCollected<IntegerObject>(2));
EXPECT_EQ(1u, map->size());
TestSupportingGC::PreciselyCollectGarbage();
// Entries with dead values are removed.
EXPECT_EQ(0u, map->size());
}
TEST_F(WeaknessMarkingTest, NullValueInReverseEphemeron) {
using Map = GCedHeapHashMap<Member<IntegerObject>, WeakMember<IntegerObject>>;
Persistent<Map> map = MakeGarbageCollected<Map>();
Persistent<IntegerObject> key = MakeGarbageCollected<IntegerObject>(1);
map->insert(key.Get(), nullptr);
EXPECT_EQ(1u, map->size());
TestSupportingGC::PreciselyCollectGarbage();
// Entries with null values are kept.
EXPECT_EQ(1u, map->size());
}
namespace weakness_marking_test {
TEST_F(WeaknessMarkingTest, SwapIntoAlreadyProcessedWeakSet) {
// Regression test: https://crbug.com/1038623
//
// Test ensures that an empty weak set that has already been marked sets up
// weakness callbacks. This is important as another backing may be swapped in
// at some point after marking it initially.
using WeakLinkedSet = GCedHeapLinkedHashSet<WeakMember<IntegerObject>>;
Persistent<WeakLinkedSet> holder3(MakeGarbageCollected<WeakLinkedSet>());
Persistent<WeakLinkedSet> holder4(MakeGarbageCollected<WeakLinkedSet>());
holder3->insert(MakeGarbageCollected<IntegerObject>(1));
IncrementalMarkingTestDriver driver2(ThreadState::Current());
driver2.StartGC();
driver2.TriggerMarkingSteps();
holder3->Swap(*holder4.Get());
driver2.FinishGC();
}
TEST_F(WeaknessMarkingTest, EmptyEphemeronCollection) {
// Tests that an empty ephemeron collection does not crash in the GC when
// processing a non-existent backing store.
using Map = GCedHeapHashMap<Member<IntegerObject>, WeakMember<IntegerObject>>;
Persistent<Map> map = MakeGarbageCollected<Map>();
TestSupportingGC::PreciselyCollectGarbage();
}
TEST_F(WeaknessMarkingTest, ClearWeakHashTableAfterMarking) {
// Regression test: https://crbug.com/1054363
//
// Test ensures that no marked backing with weak pointers to dead object is
// left behind after marking. The test creates a backing that is floating
// garbage. The marking verifier ensures that all buckets are properly
// deleted.
using Set = GCedHeapHashSet<WeakMember<IntegerObject>>;
Persistent<Set> holder(MakeGarbageCollected<Set>());
holder->insert(MakeGarbageCollected<IntegerObject>(1));
IncrementalMarkingTestDriver driver(ThreadState::Current());
driver.StartGC();
driver.TriggerMarkingSteps();
holder->clear();
driver.FinishGC();
}
TEST_F(WeaknessMarkingTest, StrongifyBackingOnStack) {
// Test eunsures that conservative GC strongifies the backing store of
// on-stack HeapLinkedHashSet.
using WeakSet = HeapLinkedHashSet<WeakMember<IntegerObject>>;
using StrongSet = HeapLinkedHashSet<Member<IntegerObject>>;
WeakSet weak_set_on_stack;
weak_set_on_stack.insert(MakeGarbageCollected<IntegerObject>(1));
StrongSet strong_set_on_stack;
strong_set_on_stack.insert(MakeGarbageCollected<IntegerObject>(1));
TestSupportingGC::ConservativelyCollectGarbage();
EXPECT_EQ(1u, weak_set_on_stack.size());
EXPECT_EQ(1u, strong_set_on_stack.size());
EXPECT_EQ(1, weak_set_on_stack.begin()->Get()->Value());
EXPECT_EQ(1, strong_set_on_stack.begin()->Get()->Value());
}
TEST_F(WeaknessMarkingTest, StrongifyAlreadyMarkedOnBackingDuringIteration) {
using WeakSet = GCedHeapHashSet<WeakMember<IntegerObject>>;
static constexpr size_t kNumberOfWeakEntries = 1000;
Persistent<WeakSet> weak_set = MakeGarbageCollected<WeakSet>();
for (size_t i = 0; i < kNumberOfWeakEntries; i++) {
weak_set->insert(MakeGarbageCollected<IntegerObject>(i));
}
CHECK_EQ(weak_set->size(), kNumberOfWeakEntries);
IncrementalMarkingTestDriver driver(ThreadState::Current());
driver.StartGC();
driver.TriggerMarkingSteps();
bool trigger_gc = true;
for (auto& it : *weak_set.Get()) {
if (trigger_gc) {
TestSupportingGC::ConservativelyCollectGarbage();
trigger_gc = false;
(void)it;
}
}
CHECK_EQ(weak_set->size(), kNumberOfWeakEntries);
}
} // namespace weakness_marking_test
} // namespace blink
|
