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// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_EXECUTION_ISOLATE_INL_H_
#define V8_EXECUTION_ISOLATE_INL_H_
#include "src/execution/isolate.h"
#include "src/objects/cell-inl.h"
#include "src/objects/objects-inl.h"
#include "src/objects/oddball.h"
#include "src/objects/property-cell.h"
#include "src/objects/regexp-match-info.h"
#include "src/objects/shared-function-info.h"
namespace v8 {
namespace internal {
IsolateAllocationMode Isolate::isolate_allocation_mode() {
return isolate_allocator_->mode();
}
void Isolate::set_context(Context context) {
DCHECK(context.is_null() || context.IsContext());
thread_local_top()->context_ = context;
}
Handle<NativeContext> Isolate::native_context() {
return handle(context().native_context(), this);
}
NativeContext Isolate::raw_native_context() {
return context().native_context();
}
Object Isolate::pending_exception() {
DCHECK(has_pending_exception());
DCHECK(!thread_local_top()->pending_exception_.IsException(this));
return thread_local_top()->pending_exception_;
}
void Isolate::set_pending_exception(Object exception_obj) {
DCHECK(!exception_obj.IsException(this));
thread_local_top()->pending_exception_ = exception_obj;
}
void Isolate::clear_pending_exception() {
DCHECK(!thread_local_top()->pending_exception_.IsException(this));
thread_local_top()->pending_exception_ = ReadOnlyRoots(this).the_hole_value();
}
bool Isolate::has_pending_exception() {
DCHECK(!thread_local_top()->pending_exception_.IsException(this));
return !thread_local_top()->pending_exception_.IsTheHole(this);
}
void Isolate::clear_pending_message() {
thread_local_top()->pending_message_obj_ =
ReadOnlyRoots(this).the_hole_value();
}
Object Isolate::scheduled_exception() {
DCHECK(has_scheduled_exception());
DCHECK(!thread_local_top()->scheduled_exception_.IsException(this));
return thread_local_top()->scheduled_exception_;
}
bool Isolate::has_scheduled_exception() {
DCHECK(!thread_local_top()->scheduled_exception_.IsException(this));
return thread_local_top()->scheduled_exception_ !=
ReadOnlyRoots(this).the_hole_value();
}
void Isolate::clear_scheduled_exception() {
DCHECK(!thread_local_top()->scheduled_exception_.IsException(this));
thread_local_top()->scheduled_exception_ =
ReadOnlyRoots(this).the_hole_value();
}
bool Isolate::is_catchable_by_javascript(Object exception) {
return exception != ReadOnlyRoots(heap()).termination_exception();
}
void Isolate::FireBeforeCallEnteredCallback() {
for (auto& callback : before_call_entered_callbacks_) {
callback(reinterpret_cast<v8::Isolate*>(this));
}
}
Handle<JSGlobalObject> Isolate::global_object() {
return handle(context().global_object(), this);
}
Handle<JSGlobalProxy> Isolate::global_proxy() {
return handle(context().global_proxy(), this);
}
Isolate::ExceptionScope::ExceptionScope(Isolate* isolate)
: isolate_(isolate),
pending_exception_(isolate_->pending_exception(), isolate_) {}
Isolate::ExceptionScope::~ExceptionScope() {
isolate_->set_pending_exception(*pending_exception_);
}
#define NATIVE_CONTEXT_FIELD_ACCESSOR(index, type, name) \
Handle<type> Isolate::name() { \
return Handle<type>(raw_native_context().name(), this); \
} \
bool Isolate::is_##name(type value) { \
return raw_native_context().is_##name(value); \
}
NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_FIELD_ACCESSOR)
#undef NATIVE_CONTEXT_FIELD_ACCESSOR
bool Isolate::IsArrayConstructorIntact() {
Cell array_constructor_cell =
Cell::cast(root(RootIndex::kArrayConstructorProtector));
return array_constructor_cell.value() == Smi::FromInt(kProtectorValid);
}
bool Isolate::IsArraySpeciesLookupChainIntact() {
// Note: It would be nice to have debug checks to make sure that the
// species protector is accurate, but this would be hard to do for most of
// what the protector stands for:
// - You'd need to traverse the heap to check that no Array instance has
// a constructor property
// - To check that Array[Symbol.species] == Array, JS code has to execute,
// but JS cannot be invoked in callstack overflow situations
// All that could be checked reliably is that
// Array.prototype.constructor == Array. Given that limitation, no check is
// done here. In place, there are mjsunit tests harmony/array-species* which
// ensure that behavior is correct in various invalid protector cases.
PropertyCell species_cell =
PropertyCell::cast(root(RootIndex::kArraySpeciesProtector));
return species_cell.value().IsSmi() &&
Smi::ToInt(species_cell.value()) == kProtectorValid;
}
bool Isolate::IsTypedArraySpeciesLookupChainIntact() {
PropertyCell species_cell =
PropertyCell::cast(root(RootIndex::kTypedArraySpeciesProtector));
return species_cell.value().IsSmi() &&
Smi::ToInt(species_cell.value()) == kProtectorValid;
}
bool Isolate::IsRegExpSpeciesLookupChainIntact(
Handle<NativeContext> native_context) {
DCHECK_EQ(*native_context, this->raw_native_context());
PropertyCell species_cell = native_context->regexp_species_protector();
return species_cell.value().IsSmi() &&
Smi::ToInt(species_cell.value()) == kProtectorValid;
}
bool Isolate::IsPromiseSpeciesLookupChainIntact() {
PropertyCell species_cell =
PropertyCell::cast(root(RootIndex::kPromiseSpeciesProtector));
return species_cell.value().IsSmi() &&
Smi::ToInt(species_cell.value()) == kProtectorValid;
}
bool Isolate::IsStringLengthOverflowIntact() {
Cell string_length_cell = Cell::cast(root(RootIndex::kStringLengthProtector));
return string_length_cell.value() == Smi::FromInt(kProtectorValid);
}
bool Isolate::IsArrayBufferDetachingIntact() {
PropertyCell buffer_detaching =
PropertyCell::cast(root(RootIndex::kArrayBufferDetachingProtector));
return buffer_detaching.value() == Smi::FromInt(kProtectorValid);
}
bool Isolate::IsArrayIteratorLookupChainIntact() {
PropertyCell array_iterator_cell =
PropertyCell::cast(root(RootIndex::kArrayIteratorProtector));
return array_iterator_cell.value() == Smi::FromInt(kProtectorValid);
}
bool Isolate::IsMapIteratorLookupChainIntact() {
PropertyCell map_iterator_cell =
PropertyCell::cast(root(RootIndex::kMapIteratorProtector));
return map_iterator_cell.value() == Smi::FromInt(kProtectorValid);
}
bool Isolate::IsSetIteratorLookupChainIntact() {
PropertyCell set_iterator_cell =
PropertyCell::cast(root(RootIndex::kSetIteratorProtector));
return set_iterator_cell.value() == Smi::FromInt(kProtectorValid);
}
bool Isolate::IsStringIteratorLookupChainIntact() {
PropertyCell string_iterator_cell =
PropertyCell::cast(root(RootIndex::kStringIteratorProtector));
return string_iterator_cell.value() == Smi::FromInt(kProtectorValid);
}
} // namespace internal
} // namespace v8
#endif // V8_EXECUTION_ISOLATE_INL_H_
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