Line data Source code
1 : // Copyright 2014 the V8 project 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 "src/assert-scope.h"
6 :
7 : #include "src/base/lazy-instance.h"
8 : #include "src/base/platform/platform.h"
9 : #include "src/isolate.h"
10 : #include "src/utils.h"
11 :
12 : namespace v8 {
13 : namespace internal {
14 :
15 : namespace {
16 :
17 : struct PerThreadAssertKeyConstructTrait final {
18 : static void Construct(base::Thread::LocalStorageKey* key) {
19 0 : *key = base::Thread::CreateThreadLocalKey();
20 : }
21 : };
22 :
23 :
24 : typedef base::LazyStaticInstance<base::Thread::LocalStorageKey,
25 : PerThreadAssertKeyConstructTrait>::type
26 : PerThreadAssertKey;
27 :
28 :
29 : PerThreadAssertKey kPerThreadAssertKey;
30 :
31 : } // namespace
32 :
33 :
34 : class PerThreadAssertData final {
35 : public:
36 0 : PerThreadAssertData() : nesting_level_(0) {
37 0 : for (int i = 0; i < LAST_PER_THREAD_ASSERT_TYPE; i++) {
38 0 : assert_states_[i] = true;
39 : }
40 : }
41 :
42 : ~PerThreadAssertData() {
43 : for (int i = 0; i < LAST_PER_THREAD_ASSERT_TYPE; ++i) {
44 : DCHECK(assert_states_[i]);
45 : }
46 : }
47 :
48 0 : bool Get(PerThreadAssertType type) const { return assert_states_[type]; }
49 0 : void Set(PerThreadAssertType type, bool x) { assert_states_[type] = x; }
50 :
51 0 : void IncrementLevel() { ++nesting_level_; }
52 0 : bool DecrementLevel() { return --nesting_level_ == 0; }
53 :
54 0 : static PerThreadAssertData* GetCurrent() {
55 : return reinterpret_cast<PerThreadAssertData*>(
56 0 : base::Thread::GetThreadLocal(kPerThreadAssertKey.Get()));
57 : }
58 0 : static void SetCurrent(PerThreadAssertData* data) {
59 0 : base::Thread::SetThreadLocal(kPerThreadAssertKey.Get(), data);
60 0 : }
61 :
62 : private:
63 : bool assert_states_[LAST_PER_THREAD_ASSERT_TYPE];
64 : int nesting_level_;
65 :
66 : DISALLOW_COPY_AND_ASSIGN(PerThreadAssertData);
67 : };
68 :
69 :
70 : template <PerThreadAssertType kType, bool kAllow>
71 0 : PerThreadAssertScope<kType, kAllow>::PerThreadAssertScope()
72 0 : : data_(PerThreadAssertData::GetCurrent()) {
73 0 : if (data_ == NULL) {
74 0 : data_ = new PerThreadAssertData();
75 0 : PerThreadAssertData::SetCurrent(data_);
76 : }
77 0 : data_->IncrementLevel();
78 0 : old_state_ = data_->Get(kType);
79 : data_->Set(kType, kAllow);
80 0 : }
81 :
82 :
83 : template <PerThreadAssertType kType, bool kAllow>
84 0 : PerThreadAssertScope<kType, kAllow>::~PerThreadAssertScope() {
85 0 : if (data_ == nullptr) return;
86 0 : Release();
87 0 : }
88 :
89 : template <PerThreadAssertType kType, bool kAllow>
90 0 : void PerThreadAssertScope<kType, kAllow>::Release() {
91 : DCHECK_NOT_NULL(data_);
92 0 : data_->Set(kType, old_state_);
93 0 : if (data_->DecrementLevel()) {
94 0 : PerThreadAssertData::SetCurrent(NULL);
95 0 : delete data_;
96 : }
97 0 : data_ = nullptr;
98 0 : }
99 :
100 : // static
101 : template <PerThreadAssertType kType, bool kAllow>
102 0 : bool PerThreadAssertScope<kType, kAllow>::IsAllowed() {
103 0 : PerThreadAssertData* data = PerThreadAssertData::GetCurrent();
104 0 : return data == NULL || data->Get(kType);
105 : }
106 :
107 :
108 : template <PerIsolateAssertType kType, bool kAllow>
109 : class PerIsolateAssertScope<kType, kAllow>::DataBit
110 : : public BitField<bool, kType, 1> {};
111 :
112 :
113 : template <PerIsolateAssertType kType, bool kAllow>
114 29656366 : PerIsolateAssertScope<kType, kAllow>::PerIsolateAssertScope(Isolate* isolate)
115 29656366 : : isolate_(isolate), old_data_(isolate->per_isolate_assert_data()) {
116 : DCHECK_NOT_NULL(isolate);
117 : STATIC_ASSERT(kType < 32);
118 : isolate_->set_per_isolate_assert_data(DataBit::update(old_data_, kAllow));
119 14828183 : }
120 :
121 :
122 : template <PerIsolateAssertType kType, bool kAllow>
123 14828212 : PerIsolateAssertScope<kType, kAllow>::~PerIsolateAssertScope() {
124 14828212 : isolate_->set_per_isolate_assert_data(old_data_);
125 14828212 : }
126 :
127 :
128 : // static
129 : template <PerIsolateAssertType kType, bool kAllow>
130 124652062 : bool PerIsolateAssertScope<kType, kAllow>::IsAllowed(Isolate* isolate) {
131 124652062 : return DataBit::decode(isolate->per_isolate_assert_data());
132 : }
133 :
134 :
135 : // -----------------------------------------------------------------------------
136 : // Instantiations.
137 :
138 : template class PerThreadAssertScope<HEAP_ALLOCATION_ASSERT, false>;
139 : template class PerThreadAssertScope<HEAP_ALLOCATION_ASSERT, true>;
140 : template class PerThreadAssertScope<HANDLE_ALLOCATION_ASSERT, false>;
141 : template class PerThreadAssertScope<HANDLE_ALLOCATION_ASSERT, true>;
142 : template class PerThreadAssertScope<HANDLE_DEREFERENCE_ASSERT, false>;
143 : template class PerThreadAssertScope<HANDLE_DEREFERENCE_ASSERT, true>;
144 : template class PerThreadAssertScope<DEFERRED_HANDLE_DEREFERENCE_ASSERT, false>;
145 : template class PerThreadAssertScope<DEFERRED_HANDLE_DEREFERENCE_ASSERT, true>;
146 : template class PerThreadAssertScope<CODE_DEPENDENCY_CHANGE_ASSERT, false>;
147 : template class PerThreadAssertScope<CODE_DEPENDENCY_CHANGE_ASSERT, true>;
148 :
149 : template class PerIsolateAssertScope<JAVASCRIPT_EXECUTION_ASSERT, false>;
150 : template class PerIsolateAssertScope<JAVASCRIPT_EXECUTION_ASSERT, true>;
151 : template class PerIsolateAssertScope<JAVASCRIPT_EXECUTION_THROWS, false>;
152 : template class PerIsolateAssertScope<JAVASCRIPT_EXECUTION_THROWS, true>;
153 : template class PerIsolateAssertScope<DEOPTIMIZATION_ASSERT, false>;
154 : template class PerIsolateAssertScope<DEOPTIMIZATION_ASSERT, true>;
155 : template class PerIsolateAssertScope<COMPILATION_ASSERT, false>;
156 : template class PerIsolateAssertScope<COMPILATION_ASSERT, true>;
157 : template class PerIsolateAssertScope<NO_EXCEPTION_ASSERT, false>;
158 : template class PerIsolateAssertScope<NO_EXCEPTION_ASSERT, true>;
159 :
160 : } // namespace internal
161 : } // namespace v8
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