// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_ISOLATE_INL_H_
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#define V8_ISOLATE_INL_H_
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#include "src/isolate.h"
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#include "src/objects-inl.h"
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namespace v8 {
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namespace internal {
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bool Isolate::FromWritableHeapObject(HeapObject* obj, Isolate** isolate) {
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i::MemoryChunk* chunk = i::MemoryChunk::FromHeapObject(obj);
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if (chunk->owner()->identity() == i::RO_SPACE) {
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*isolate = nullptr;
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return false;
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}
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*isolate = chunk->heap()->isolate();
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return true;
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}
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void Isolate::set_context(Context* context) {
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DCHECK(context == nullptr || context->IsContext());
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thread_local_top_.context_ = context;
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}
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Handle<NativeContext> Isolate::native_context() {
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return handle(context()->native_context(), this);
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}
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NativeContext* Isolate::raw_native_context() {
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return context()->native_context();
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}
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Object* Isolate::pending_exception() {
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DCHECK(has_pending_exception());
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DCHECK(!thread_local_top_.pending_exception_->IsException(this));
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return thread_local_top_.pending_exception_;
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}
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void Isolate::set_pending_exception(Object* exception_obj) {
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DCHECK(!exception_obj->IsException(this));
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thread_local_top_.pending_exception_ = exception_obj;
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}
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void Isolate::clear_pending_exception() {
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DCHECK(!thread_local_top_.pending_exception_->IsException(this));
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thread_local_top_.pending_exception_ = ReadOnlyRoots(this).the_hole_value();
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}
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bool Isolate::has_pending_exception() {
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DCHECK(!thread_local_top_.pending_exception_->IsException(this));
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return !thread_local_top_.pending_exception_->IsTheHole(this);
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}
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Object* Isolate::get_wasm_caught_exception() {
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return thread_local_top_.wasm_caught_exception_;
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}
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void Isolate::set_wasm_caught_exception(Object* exception) {
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thread_local_top_.wasm_caught_exception_ = exception;
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}
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void Isolate::clear_wasm_caught_exception() {
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thread_local_top_.wasm_caught_exception_ = nullptr;
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}
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void Isolate::clear_pending_message() {
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thread_local_top_.pending_message_obj_ = ReadOnlyRoots(this).the_hole_value();
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}
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Object* Isolate::scheduled_exception() {
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DCHECK(has_scheduled_exception());
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DCHECK(!thread_local_top_.scheduled_exception_->IsException(this));
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return thread_local_top_.scheduled_exception_;
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}
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bool Isolate::has_scheduled_exception() {
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DCHECK(!thread_local_top_.scheduled_exception_->IsException(this));
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return thread_local_top_.scheduled_exception_ !=
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ReadOnlyRoots(this).the_hole_value();
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}
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void Isolate::clear_scheduled_exception() {
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DCHECK(!thread_local_top_.scheduled_exception_->IsException(this));
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thread_local_top_.scheduled_exception_ = ReadOnlyRoots(this).the_hole_value();
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}
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bool Isolate::is_catchable_by_javascript(Object* exception) {
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return exception != ReadOnlyRoots(heap()).termination_exception();
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}
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void Isolate::FireBeforeCallEnteredCallback() {
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for (auto& callback : before_call_entered_callbacks_) {
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callback(reinterpret_cast<v8::Isolate*>(this));
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}
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}
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void Isolate::FireMicrotasksCompletedCallback() {
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std::vector<MicrotasksCompletedCallback> callbacks(
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microtasks_completed_callbacks_);
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for (auto& callback : callbacks) {
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callback(reinterpret_cast<v8::Isolate*>(this));
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}
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}
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Handle<JSGlobalObject> Isolate::global_object() {
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return handle(context()->global_object(), this);
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}
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Handle<JSObject> Isolate::global_proxy() {
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return handle(context()->global_proxy(), this);
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}
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Isolate::ExceptionScope::ExceptionScope(Isolate* isolate)
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: isolate_(isolate),
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pending_exception_(isolate_->pending_exception(), isolate_) {}
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Isolate::ExceptionScope::~ExceptionScope() {
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isolate_->set_pending_exception(*pending_exception_);
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}
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#define NATIVE_CONTEXT_FIELD_ACCESSOR(index, type, name) \
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Handle<type> Isolate::name() { \
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return Handle<type>(raw_native_context()->name(), this); \
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} \
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bool Isolate::is_##name(type* value) { \
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return raw_native_context()->is_##name(value); \
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}
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NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_FIELD_ACCESSOR)
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#undef NATIVE_CONTEXT_FIELD_ACCESSOR
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bool Isolate::IsArrayConstructorIntact() {
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Cell* array_constructor_cell = heap()->array_constructor_protector();
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return array_constructor_cell->value() == Smi::FromInt(kProtectorValid);
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}
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bool Isolate::IsArraySpeciesLookupChainIntact() {
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// Note: It would be nice to have debug checks to make sure that the
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// species protector is accurate, but this would be hard to do for most of
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// what the protector stands for:
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// - You'd need to traverse the heap to check that no Array instance has
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// a constructor property
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// - To check that Array[Symbol.species] == Array, JS code has to execute,
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// but JS cannot be invoked in callstack overflow situations
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// All that could be checked reliably is that
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// Array.prototype.constructor == Array. Given that limitation, no check is
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// done here. In place, there are mjsunit tests harmony/array-species* which
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// ensure that behavior is correct in various invalid protector cases.
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PropertyCell* species_cell = heap()->array_species_protector();
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return species_cell->value()->IsSmi() &&
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Smi::ToInt(species_cell->value()) == kProtectorValid;
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}
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bool Isolate::IsTypedArraySpeciesLookupChainIntact() {
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PropertyCell* species_cell = heap()->typed_array_species_protector();
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return species_cell->value()->IsSmi() &&
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Smi::ToInt(species_cell->value()) == kProtectorValid;
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}
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bool Isolate::IsPromiseSpeciesLookupChainIntact() {
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PropertyCell* species_cell = heap()->promise_species_protector();
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return species_cell->value()->IsSmi() &&
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Smi::ToInt(species_cell->value()) == kProtectorValid;
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}
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bool Isolate::IsStringLengthOverflowIntact() {
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Cell* string_length_cell = heap()->string_length_protector();
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return string_length_cell->value() == Smi::FromInt(kProtectorValid);
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}
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bool Isolate::IsArrayBufferNeuteringIntact() {
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PropertyCell* buffer_neutering = heap()->array_buffer_neutering_protector();
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return buffer_neutering->value() == Smi::FromInt(kProtectorValid);
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}
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bool Isolate::IsArrayIteratorLookupChainIntact() {
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PropertyCell* array_iterator_cell = heap()->array_iterator_protector();
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return array_iterator_cell->value() == Smi::FromInt(kProtectorValid);
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}
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} // namespace internal
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} // namespace v8
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#endif // V8_ISOLATE_INL_H_
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