Line data Source code
1 : // Copyright 2015 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 : #ifndef V8_ISOLATE_INL_H_
6 : #define V8_ISOLATE_INL_H_
7 :
8 : #include "src/isolate.h"
9 : #include "src/objects-inl.h"
10 : #include "src/objects/cell-inl.h"
11 : #include "src/objects/oddball.h"
12 : #include "src/objects/property-cell.h"
13 : #include "src/objects/regexp-match-info.h"
14 : #include "src/objects/shared-function-info.h"
15 :
16 : namespace v8 {
17 : namespace internal {
18 :
19 : IsolateAllocationMode Isolate::isolate_allocation_mode() {
20 : return isolate_allocator_->mode();
21 : }
22 :
23 : void Isolate::set_context(Context context) {
24 : DCHECK(context.is_null() || context->IsContext());
25 31215302 : thread_local_top()->context_ = context;
26 : }
27 :
28 70473347 : Handle<NativeContext> Isolate::native_context() {
29 70473389 : return handle(context()->native_context(), this);
30 : }
31 :
32 : NativeContext Isolate::raw_native_context() {
33 : return context()->native_context();
34 : }
35 :
36 : Object Isolate::pending_exception() {
37 : DCHECK(has_pending_exception());
38 : DCHECK(!thread_local_top()->pending_exception_->IsException(this));
39 1677765 : return thread_local_top()->pending_exception_;
40 : }
41 :
42 : void Isolate::set_pending_exception(Object exception_obj) {
43 : DCHECK(!exception_obj->IsException(this));
44 1537504 : thread_local_top()->pending_exception_ = exception_obj;
45 : }
46 :
47 : void Isolate::clear_pending_exception() {
48 : DCHECK(!thread_local_top()->pending_exception_->IsException(this));
49 1752824 : thread_local_top()->pending_exception_ = ReadOnlyRoots(this).the_hole_value();
50 : }
51 :
52 :
53 : bool Isolate::has_pending_exception() {
54 : DCHECK(!thread_local_top()->pending_exception_->IsException(this));
55 21334 : return !thread_local_top()->pending_exception_->IsTheHole(this);
56 : }
57 :
58 :
59 : void Isolate::clear_pending_message() {
60 : thread_local_top()->pending_message_obj_ =
61 20132061 : ReadOnlyRoots(this).the_hole_value();
62 : }
63 :
64 : Object Isolate::scheduled_exception() {
65 : DCHECK(has_scheduled_exception());
66 : DCHECK(!thread_local_top()->scheduled_exception_->IsException(this));
67 31552 : return thread_local_top()->scheduled_exception_;
68 : }
69 :
70 : bool Isolate::has_scheduled_exception() {
71 : DCHECK(!thread_local_top()->scheduled_exception_->IsException(this));
72 : return thread_local_top()->scheduled_exception_ !=
73 : ReadOnlyRoots(this).the_hole_value();
74 : }
75 :
76 :
77 : void Isolate::clear_scheduled_exception() {
78 : DCHECK(!thread_local_top()->scheduled_exception_->IsException(this));
79 : thread_local_top()->scheduled_exception_ =
80 94928 : ReadOnlyRoots(this).the_hole_value();
81 : }
82 :
83 : bool Isolate::is_catchable_by_javascript(Object exception) {
84 : return exception != ReadOnlyRoots(heap()).termination_exception();
85 : }
86 :
87 : void Isolate::FireBeforeCallEnteredCallback() {
88 5427999 : for (auto& callback : before_call_entered_callbacks_) {
89 80 : callback(reinterpret_cast<v8::Isolate*>(this));
90 : }
91 : }
92 :
93 9415138 : Handle<JSGlobalObject> Isolate::global_object() {
94 18830268 : return handle(context()->global_object(), this);
95 : }
96 :
97 270642 : Handle<JSGlobalProxy> Isolate::global_proxy() {
98 541284 : return handle(context()->global_proxy(), this);
99 : }
100 :
101 8116 : Isolate::ExceptionScope::ExceptionScope(Isolate* isolate)
102 : : isolate_(isolate),
103 16232 : pending_exception_(isolate_->pending_exception(), isolate_) {}
104 :
105 :
106 8116 : Isolate::ExceptionScope::~ExceptionScope() {
107 8116 : isolate_->set_pending_exception(*pending_exception_);
108 : }
109 :
110 : #define NATIVE_CONTEXT_FIELD_ACCESSOR(index, type, name) \
111 : Handle<type> Isolate::name() { \
112 : return Handle<type>(raw_native_context()->name(), this); \
113 : } \
114 : bool Isolate::is_##name(type value) { \
115 : return raw_native_context()->is_##name(value); \
116 : }
117 93851237 : NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_FIELD_ACCESSOR)
118 : #undef NATIVE_CONTEXT_FIELD_ACCESSOR
119 :
120 : bool Isolate::IsArrayConstructorIntact() {
121 : Cell array_constructor_cell =
122 : Cell::cast(root(RootIndex::kArrayConstructorProtector));
123 : return array_constructor_cell->value() == Smi::FromInt(kProtectorValid);
124 : }
125 :
126 : bool Isolate::IsArraySpeciesLookupChainIntact() {
127 : // Note: It would be nice to have debug checks to make sure that the
128 : // species protector is accurate, but this would be hard to do for most of
129 : // what the protector stands for:
130 : // - You'd need to traverse the heap to check that no Array instance has
131 : // a constructor property
132 : // - To check that Array[Symbol.species] == Array, JS code has to execute,
133 : // but JS cannot be invoked in callstack overflow situations
134 : // All that could be checked reliably is that
135 : // Array.prototype.constructor == Array. Given that limitation, no check is
136 : // done here. In place, there are mjsunit tests harmony/array-species* which
137 : // ensure that behavior is correct in various invalid protector cases.
138 :
139 : PropertyCell species_cell =
140 : PropertyCell::cast(root(RootIndex::kArraySpeciesProtector));
141 851002 : return species_cell->value()->IsSmi() &&
142 : Smi::ToInt(species_cell->value()) == kProtectorValid;
143 : }
144 :
145 : bool Isolate::IsTypedArraySpeciesLookupChainIntact() {
146 : PropertyCell species_cell =
147 : PropertyCell::cast(root(RootIndex::kTypedArraySpeciesProtector));
148 12920 : return species_cell->value()->IsSmi() &&
149 : Smi::ToInt(species_cell->value()) == kProtectorValid;
150 : }
151 :
152 : bool Isolate::IsRegExpSpeciesLookupChainIntact() {
153 : PropertyCell species_cell =
154 : PropertyCell::cast(root(RootIndex::kRegExpSpeciesProtector));
155 21832 : return species_cell->value()->IsSmi() &&
156 : Smi::ToInt(species_cell->value()) == kProtectorValid;
157 : }
158 :
159 : bool Isolate::IsPromiseSpeciesLookupChainIntact() {
160 : PropertyCell species_cell =
161 : PropertyCell::cast(root(RootIndex::kPromiseSpeciesProtector));
162 23126 : return species_cell->value()->IsSmi() &&
163 : Smi::ToInt(species_cell->value()) == kProtectorValid;
164 : }
165 :
166 : bool Isolate::IsStringLengthOverflowIntact() {
167 : Cell string_length_cell = Cell::cast(root(RootIndex::kStringLengthProtector));
168 : return string_length_cell->value() == Smi::FromInt(kProtectorValid);
169 : }
170 :
171 : bool Isolate::IsArrayBufferDetachingIntact() {
172 : PropertyCell buffer_detaching =
173 : PropertyCell::cast(root(RootIndex::kArrayBufferDetachingProtector));
174 : return buffer_detaching->value() == Smi::FromInt(kProtectorValid);
175 : }
176 :
177 : bool Isolate::IsArrayIteratorLookupChainIntact() {
178 : PropertyCell array_iterator_cell =
179 : PropertyCell::cast(root(RootIndex::kArrayIteratorProtector));
180 : return array_iterator_cell->value() == Smi::FromInt(kProtectorValid);
181 : }
182 :
183 : bool Isolate::IsMapIteratorLookupChainIntact() {
184 : PropertyCell map_iterator_cell =
185 : PropertyCell::cast(root(RootIndex::kMapIteratorProtector));
186 : return map_iterator_cell->value() == Smi::FromInt(kProtectorValid);
187 : }
188 :
189 : bool Isolate::IsSetIteratorLookupChainIntact() {
190 : PropertyCell set_iterator_cell =
191 : PropertyCell::cast(root(RootIndex::kSetIteratorProtector));
192 : return set_iterator_cell->value() == Smi::FromInt(kProtectorValid);
193 : }
194 :
195 : bool Isolate::IsStringIteratorLookupChainIntact() {
196 : PropertyCell string_iterator_cell =
197 : PropertyCell::cast(root(RootIndex::kStringIteratorProtector));
198 : return string_iterator_cell->value() == Smi::FromInt(kProtectorValid);
199 : }
200 :
201 : } // namespace internal
202 : } // namespace v8
203 :
204 : #endif // V8_ISOLATE_INL_H_
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