// Copyright 2012 the V8 project authors. All rights reserved.
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following
-// disclaimer in the documentation and/or other materials provided
-// with the distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived
-// from this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
#include "v8.h"
-#include "accessors.h"
-#include "api.h"
-#include "arguments.h"
-#include "bootstrapper.h"
-#include "compiler.h"
-#include "debug.h"
-#include "execution.h"
-#include "global-handles.h"
-#include "natives.h"
-#include "runtime.h"
-#include "string-search.h"
-#include "stub-cache.h"
-#include "vm-state-inl.h"
+#include "handles.h"
namespace v8 {
namespace internal {
}
-Handle<FixedArray> AddKeysFromJSArray(Handle<FixedArray> content,
- Handle<JSArray> array) {
- CALL_HEAP_FUNCTION(content->GetIsolate(),
- content->AddKeysFromJSArray(*array), FixedArray);
-}
-
-
-Handle<FixedArray> UnionOfKeys(Handle<FixedArray> first,
- Handle<FixedArray> second) {
- CALL_HEAP_FUNCTION(first->GetIsolate(),
- first->UnionOfKeys(*second), FixedArray);
-}
-
-
-Handle<JSGlobalProxy> ReinitializeJSGlobalProxy(
- Handle<JSFunction> constructor,
- Handle<JSGlobalProxy> global) {
- CALL_HEAP_FUNCTION(
- constructor->GetIsolate(),
- constructor->GetHeap()->ReinitializeJSGlobalProxy(*constructor, *global),
- JSGlobalProxy);
-}
-
-
-void FlattenString(Handle<String> string) {
- CALL_HEAP_FUNCTION_VOID(string->GetIsolate(), string->TryFlatten());
-}
-
-
-Handle<String> FlattenGetString(Handle<String> string) {
- CALL_HEAP_FUNCTION(string->GetIsolate(), string->TryFlatten(), String);
-}
-
-
-Handle<Object> ForceSetProperty(Handle<JSObject> object,
- Handle<Object> key,
- Handle<Object> value,
- PropertyAttributes attributes) {
- return Runtime::ForceSetObjectProperty(object->GetIsolate(), object, key,
- value, attributes);
-}
-
-
-Handle<Object> DeleteProperty(Handle<JSObject> object, Handle<Object> key) {
- Isolate* isolate = object->GetIsolate();
- CALL_HEAP_FUNCTION(isolate,
- Runtime::DeleteObjectProperty(
- isolate, object, key, JSReceiver::NORMAL_DELETION),
- Object);
-}
-
-
-Handle<Object> ForceDeleteProperty(Handle<JSObject> object,
- Handle<Object> key) {
- Isolate* isolate = object->GetIsolate();
- CALL_HEAP_FUNCTION(isolate,
- Runtime::DeleteObjectProperty(
- isolate, object, key, JSReceiver::FORCE_DELETION),
- Object);
-}
-
-
-Handle<Object> HasProperty(Handle<JSReceiver> obj, Handle<Object> key) {
- Isolate* isolate = obj->GetIsolate();
- CALL_HEAP_FUNCTION(isolate,
- Runtime::HasObjectProperty(isolate, obj, key), Object);
-}
-
-
-Handle<Object> GetProperty(Handle<JSReceiver> obj,
- const char* name) {
- Isolate* isolate = obj->GetIsolate();
- Handle<String> str = isolate->factory()->InternalizeUtf8String(name);
- CALL_HEAP_FUNCTION(isolate, obj->GetProperty(*str), Object);
-}
-
-
-Handle<Object> GetProperty(Isolate* isolate,
- Handle<Object> obj,
- Handle<Object> key) {
- CALL_HEAP_FUNCTION(isolate,
- Runtime::GetObjectProperty(isolate, obj, key), Object);
-}
-
-
-Handle<String> LookupSingleCharacterStringFromCode(Isolate* isolate,
- uint32_t index) {
- CALL_HEAP_FUNCTION(
- isolate,
- isolate->heap()->LookupSingleCharacterStringFromCode(index),
- String);
-}
-
-
-// Wrappers for scripts are kept alive and cached in weak global
-// handles referred from foreign objects held by the scripts as long as
-// they are used. When they are not used anymore, the garbage
-// collector will call the weak callback on the global handle
-// associated with the wrapper and get rid of both the wrapper and the
-// handle.
-static void ClearWrapperCache(
- const v8::WeakCallbackData<v8::Value, void>& data) {
- Object** location = reinterpret_cast<Object**>(data.GetParameter());
- JSValue* wrapper = JSValue::cast(*location);
- Foreign* foreign = Script::cast(wrapper->value())->wrapper();
- ASSERT_EQ(foreign->foreign_address(), reinterpret_cast<Address>(location));
- foreign->set_foreign_address(0);
- GlobalHandles::Destroy(location);
- Isolate* isolate = reinterpret_cast<Isolate*>(data.GetIsolate());
- isolate->counters()->script_wrappers()->Decrement();
-}
-
-
-Handle<JSValue> GetScriptWrapper(Handle<Script> script) {
- if (script->wrapper()->foreign_address() != NULL) {
- // Return a handle for the existing script wrapper from the cache.
- return Handle<JSValue>(
- *reinterpret_cast<JSValue**>(script->wrapper()->foreign_address()));
- }
- Isolate* isolate = script->GetIsolate();
- // Construct a new script wrapper.
- isolate->counters()->script_wrappers()->Increment();
- Handle<JSFunction> constructor = isolate->script_function();
- Handle<JSValue> result =
- Handle<JSValue>::cast(isolate->factory()->NewJSObject(constructor));
-
- // The allocation might have triggered a GC, which could have called this
- // function recursively, and a wrapper has already been created and cached.
- // In that case, simply return a handle for the cached wrapper.
- if (script->wrapper()->foreign_address() != NULL) {
- return Handle<JSValue>(
- *reinterpret_cast<JSValue**>(script->wrapper()->foreign_address()));
- }
-
- result->set_value(*script);
-
- // Create a new weak global handle and use it to cache the wrapper
- // for future use. The cache will automatically be cleared by the
- // garbage collector when it is not used anymore.
- Handle<Object> handle = isolate->global_handles()->Create(*result);
- GlobalHandles::MakeWeak(handle.location(),
- reinterpret_cast<void*>(handle.location()),
- &ClearWrapperCache);
- script->wrapper()->set_foreign_address(
- reinterpret_cast<Address>(handle.location()));
- return result;
-}
-
-
-// Init line_ends array with code positions of line ends inside script
-// source.
-void InitScriptLineEnds(Handle<Script> script) {
- if (!script->line_ends()->IsUndefined()) return;
-
- Isolate* isolate = script->GetIsolate();
-
- if (!script->source()->IsString()) {
- ASSERT(script->source()->IsUndefined());
- Handle<FixedArray> empty = isolate->factory()->NewFixedArray(0);
- script->set_line_ends(*empty);
- ASSERT(script->line_ends()->IsFixedArray());
- return;
- }
-
- Handle<String> src(String::cast(script->source()), isolate);
-
- Handle<FixedArray> array = CalculateLineEnds(src, true);
-
- if (*array != isolate->heap()->empty_fixed_array()) {
- array->set_map(isolate->heap()->fixed_cow_array_map());
- }
-
- script->set_line_ends(*array);
- ASSERT(script->line_ends()->IsFixedArray());
-}
-
-
-template <typename SourceChar>
-static void CalculateLineEnds(Isolate* isolate,
- List<int>* line_ends,
- Vector<const SourceChar> src,
- bool with_last_line) {
- const int src_len = src.length();
- StringSearch<uint8_t, SourceChar> search(isolate, STATIC_ASCII_VECTOR("\n"));
-
- // Find and record line ends.
- int position = 0;
- while (position != -1 && position < src_len) {
- position = search.Search(src, position);
- if (position != -1) {
- line_ends->Add(position);
- position++;
- } else if (with_last_line) {
- // Even if the last line misses a line end, it is counted.
- line_ends->Add(src_len);
- return;
- }
- }
-}
-
-
-Handle<FixedArray> CalculateLineEnds(Handle<String> src,
- bool with_last_line) {
- src = FlattenGetString(src);
- // Rough estimate of line count based on a roughly estimated average
- // length of (unpacked) code.
- int line_count_estimate = src->length() >> 4;
- List<int> line_ends(line_count_estimate);
- Isolate* isolate = src->GetIsolate();
- {
- DisallowHeapAllocation no_allocation; // ensure vectors stay valid.
- // Dispatch on type of strings.
- String::FlatContent content = src->GetFlatContent();
- ASSERT(content.IsFlat());
- if (content.IsAscii()) {
- CalculateLineEnds(isolate,
- &line_ends,
- content.ToOneByteVector(),
- with_last_line);
- } else {
- CalculateLineEnds(isolate,
- &line_ends,
- content.ToUC16Vector(),
- with_last_line);
- }
- }
- int line_count = line_ends.length();
- Handle<FixedArray> array = isolate->factory()->NewFixedArray(line_count);
- for (int i = 0; i < line_count; i++) {
- array->set(i, Smi::FromInt(line_ends[i]));
- }
- return array;
-}
-
-
-// Convert code position into line number.
-int GetScriptLineNumber(Handle<Script> script, int code_pos) {
- InitScriptLineEnds(script);
- DisallowHeapAllocation no_allocation;
- FixedArray* line_ends_array = FixedArray::cast(script->line_ends());
- const int line_ends_len = line_ends_array->length();
-
- if (!line_ends_len) return -1;
-
- if ((Smi::cast(line_ends_array->get(0)))->value() >= code_pos) {
- return script->line_offset()->value();
- }
-
- int left = 0;
- int right = line_ends_len;
- while (int half = (right - left) / 2) {
- if ((Smi::cast(line_ends_array->get(left + half)))->value() > code_pos) {
- right -= half;
- } else {
- left += half;
- }
- }
- return right + script->line_offset()->value();
-}
-
-
-// Convert code position into column number.
-int GetScriptColumnNumber(Handle<Script> script, int code_pos) {
- int line_number = GetScriptLineNumber(script, code_pos);
- if (line_number == -1) return -1;
-
- DisallowHeapAllocation no_allocation;
- FixedArray* line_ends_array = FixedArray::cast(script->line_ends());
- line_number = line_number - script->line_offset()->value();
- if (line_number == 0) return code_pos + script->column_offset()->value();
- int prev_line_end_pos =
- Smi::cast(line_ends_array->get(line_number - 1))->value();
- return code_pos - (prev_line_end_pos + 1);
-}
-
-
-int GetScriptLineNumberSafe(Handle<Script> script, int code_pos) {
- DisallowHeapAllocation no_allocation;
- if (!script->line_ends()->IsUndefined()) {
- return GetScriptLineNumber(script, code_pos);
- }
- // Slow mode: we do not have line_ends. We have to iterate through source.
- if (!script->source()->IsString()) {
- return -1;
- }
- String* source = String::cast(script->source());
- int line = 0;
- int len = source->length();
- for (int pos = 0; pos < len; pos++) {
- if (pos == code_pos) {
- break;
- }
- if (source->Get(pos) == '\n') {
- line++;
- }
- }
- return line;
-}
-
-
-// Compute the property keys from the interceptor.
-// TODO(rossberg): support symbols in API, and filter here if needed.
-v8::Handle<v8::Array> GetKeysForNamedInterceptor(Handle<JSReceiver> receiver,
- Handle<JSObject> object) {
- Isolate* isolate = receiver->GetIsolate();
- Handle<InterceptorInfo> interceptor(object->GetNamedInterceptor());
- PropertyCallbackArguments
- args(isolate, interceptor->data(), *receiver, *object);
- v8::Handle<v8::Array> result;
- if (!interceptor->enumerator()->IsUndefined()) {
- v8::NamedPropertyEnumeratorCallback enum_fun =
- v8::ToCData<v8::NamedPropertyEnumeratorCallback>(
- interceptor->enumerator());
- LOG(isolate, ApiObjectAccess("interceptor-named-enum", *object));
- result = args.Call(enum_fun);
- }
-#if ENABLE_EXTRA_CHECKS
- CHECK(result.IsEmpty() || v8::Utils::OpenHandle(*result)->IsJSObject());
-#endif
- return v8::Local<v8::Array>::New(reinterpret_cast<v8::Isolate*>(isolate),
- result);
-}
-
-
-// Compute the element keys from the interceptor.
-v8::Handle<v8::Array> GetKeysForIndexedInterceptor(Handle<JSReceiver> receiver,
- Handle<JSObject> object) {
- Isolate* isolate = receiver->GetIsolate();
- Handle<InterceptorInfo> interceptor(object->GetIndexedInterceptor());
- PropertyCallbackArguments
- args(isolate, interceptor->data(), *receiver, *object);
- v8::Handle<v8::Array> result;
- if (!interceptor->enumerator()->IsUndefined()) {
- v8::IndexedPropertyEnumeratorCallback enum_fun =
- v8::ToCData<v8::IndexedPropertyEnumeratorCallback>(
- interceptor->enumerator());
- LOG(isolate, ApiObjectAccess("interceptor-indexed-enum", *object));
- result = args.Call(enum_fun);
-#if ENABLE_EXTRA_CHECKS
- CHECK(result.IsEmpty() || v8::Utils::OpenHandle(*result)->IsJSObject());
-#endif
- }
- return v8::Local<v8::Array>::New(reinterpret_cast<v8::Isolate*>(isolate),
- result);
-}
-
-
-Handle<Object> GetScriptNameOrSourceURL(Handle<Script> script) {
- Isolate* isolate = script->GetIsolate();
- Handle<String> name_or_source_url_key =
- isolate->factory()->InternalizeOneByteString(
- STATIC_ASCII_VECTOR("nameOrSourceURL"));
- Handle<JSValue> script_wrapper = GetScriptWrapper(script);
- Handle<Object> property = GetProperty(isolate,
- script_wrapper,
- name_or_source_url_key);
- ASSERT(property->IsJSFunction());
- Handle<JSFunction> method = Handle<JSFunction>::cast(property);
- bool caught_exception;
- Handle<Object> result = Execution::TryCall(method, script_wrapper, 0,
- NULL, &caught_exception);
- if (caught_exception) {
- result = isolate->factory()->undefined_value();
- }
- return result;
-}
-
-
-static bool ContainsOnlyValidKeys(Handle<FixedArray> array) {
- int len = array->length();
- for (int i = 0; i < len; i++) {
- Object* e = array->get(i);
- if (!(e->IsString() || e->IsNumber())) return false;
- }
- return true;
-}
-
-
-Handle<FixedArray> GetKeysInFixedArrayFor(Handle<JSReceiver> object,
- KeyCollectionType type,
- bool* threw) {
- USE(ContainsOnlyValidKeys);
- Isolate* isolate = object->GetIsolate();
- Handle<FixedArray> content = isolate->factory()->empty_fixed_array();
- Handle<JSObject> arguments_boilerplate = Handle<JSObject>(
- isolate->context()->native_context()->sloppy_arguments_boilerplate(),
- isolate);
- Handle<JSFunction> arguments_function = Handle<JSFunction>(
- JSFunction::cast(arguments_boilerplate->map()->constructor()),
- isolate);
-
- // Only collect keys if access is permitted.
- for (Handle<Object> p = object;
- *p != isolate->heap()->null_value();
- p = Handle<Object>(p->GetPrototype(isolate), isolate)) {
- if (p->IsJSProxy()) {
- Handle<JSProxy> proxy(JSProxy::cast(*p), isolate);
- Handle<Object> args[] = { proxy };
- Handle<Object> names = Execution::Call(isolate,
- isolate->proxy_enumerate(),
- object,
- ARRAY_SIZE(args),
- args,
- threw);
- if (*threw) return content;
- content = AddKeysFromJSArray(content, Handle<JSArray>::cast(names));
- break;
- }
-
- Handle<JSObject> current(JSObject::cast(*p), isolate);
-
- // Check access rights if required.
- if (current->IsAccessCheckNeeded() &&
- !isolate->MayNamedAccessWrapper(current,
- isolate->factory()->undefined_value(),
- v8::ACCESS_KEYS)) {
- isolate->ReportFailedAccessCheckWrapper(current, v8::ACCESS_KEYS);
- if (isolate->has_scheduled_exception()) {
- isolate->PromoteScheduledException();
- *threw = true;
- }
- break;
- }
-
- // Compute the element keys.
- Handle<FixedArray> element_keys =
- isolate->factory()->NewFixedArray(current->NumberOfEnumElements());
- current->GetEnumElementKeys(*element_keys);
- content = UnionOfKeys(content, element_keys);
- ASSERT(ContainsOnlyValidKeys(content));
-
- // Add the element keys from the interceptor.
- if (current->HasIndexedInterceptor()) {
- v8::Handle<v8::Array> result =
- GetKeysForIndexedInterceptor(object, current);
- if (!result.IsEmpty())
- content = AddKeysFromJSArray(content, v8::Utils::OpenHandle(*result));
- ASSERT(ContainsOnlyValidKeys(content));
- }
-
- // We can cache the computed property keys if access checks are
- // not needed and no interceptors are involved.
- //
- // We do not use the cache if the object has elements and
- // therefore it does not make sense to cache the property names
- // for arguments objects. Arguments objects will always have
- // elements.
- // Wrapped strings have elements, but don't have an elements
- // array or dictionary. So the fast inline test for whether to
- // use the cache says yes, so we should not create a cache.
- bool cache_enum_keys =
- ((current->map()->constructor() != *arguments_function) &&
- !current->IsJSValue() &&
- !current->IsAccessCheckNeeded() &&
- !current->HasNamedInterceptor() &&
- !current->HasIndexedInterceptor());
- // Compute the property keys and cache them if possible.
- content =
- UnionOfKeys(content, GetEnumPropertyKeys(current, cache_enum_keys));
- ASSERT(ContainsOnlyValidKeys(content));
-
- // Add the property keys from the interceptor.
- if (current->HasNamedInterceptor()) {
- v8::Handle<v8::Array> result =
- GetKeysForNamedInterceptor(object, current);
- if (!result.IsEmpty())
- content = AddKeysFromJSArray(content, v8::Utils::OpenHandle(*result));
- ASSERT(ContainsOnlyValidKeys(content));
- }
-
- // If we only want local properties we bail out after the first
- // iteration.
- if (type == LOCAL_ONLY)
- break;
- }
- return content;
-}
-
-
-Handle<JSArray> GetKeysFor(Handle<JSReceiver> object, bool* threw) {
- Isolate* isolate = object->GetIsolate();
- isolate->counters()->for_in()->Increment();
- Handle<FixedArray> elements =
- GetKeysInFixedArrayFor(object, INCLUDE_PROTOS, threw);
- return isolate->factory()->NewJSArrayWithElements(elements);
-}
-
-
-Handle<FixedArray> ReduceFixedArrayTo(Handle<FixedArray> array, int length) {
- ASSERT(array->length() >= length);
- if (array->length() == length) return array;
-
- Handle<FixedArray> new_array =
- array->GetIsolate()->factory()->NewFixedArray(length);
- for (int i = 0; i < length; ++i) new_array->set(i, array->get(i));
- return new_array;
-}
-
-
-Handle<FixedArray> GetEnumPropertyKeys(Handle<JSObject> object,
- bool cache_result) {
- Isolate* isolate = object->GetIsolate();
- if (object->HasFastProperties()) {
- if (object->map()->instance_descriptors()->HasEnumCache()) {
- int own_property_count = object->map()->EnumLength();
- // If we have an enum cache, but the enum length of the given map is set
- // to kInvalidEnumCache, this means that the map itself has never used the
- // present enum cache. The first step to using the cache is to set the
- // enum length of the map by counting the number of own descriptors that
- // are not DONT_ENUM or SYMBOLIC.
- if (own_property_count == kInvalidEnumCacheSentinel) {
- own_property_count = object->map()->NumberOfDescribedProperties(
- OWN_DESCRIPTORS, DONT_SHOW);
-
- if (cache_result) object->map()->SetEnumLength(own_property_count);
- }
-
- DescriptorArray* desc = object->map()->instance_descriptors();
- Handle<FixedArray> keys(desc->GetEnumCache(), isolate);
-
- // In case the number of properties required in the enum are actually
- // present, we can reuse the enum cache. Otherwise, this means that the
- // enum cache was generated for a previous (smaller) version of the
- // Descriptor Array. In that case we regenerate the enum cache.
- if (own_property_count <= keys->length()) {
- isolate->counters()->enum_cache_hits()->Increment();
- return ReduceFixedArrayTo(keys, own_property_count);
- }
- }
-
- Handle<Map> map(object->map());
-
- if (map->instance_descriptors()->IsEmpty()) {
- isolate->counters()->enum_cache_hits()->Increment();
- if (cache_result) map->SetEnumLength(0);
- return isolate->factory()->empty_fixed_array();
- }
-
- isolate->counters()->enum_cache_misses()->Increment();
- int num_enum = map->NumberOfDescribedProperties(ALL_DESCRIPTORS, DONT_SHOW);
-
- Handle<FixedArray> storage = isolate->factory()->NewFixedArray(num_enum);
- Handle<FixedArray> indices = isolate->factory()->NewFixedArray(num_enum);
-
- Handle<DescriptorArray> descs =
- Handle<DescriptorArray>(object->map()->instance_descriptors(), isolate);
-
- int real_size = map->NumberOfOwnDescriptors();
- int enum_size = 0;
- int index = 0;
-
- for (int i = 0; i < descs->number_of_descriptors(); i++) {
- PropertyDetails details = descs->GetDetails(i);
- Object* key = descs->GetKey(i);
- if (!(details.IsDontEnum() || key->IsSymbol())) {
- if (i < real_size) ++enum_size;
- storage->set(index, key);
- if (!indices.is_null()) {
- if (details.type() != FIELD) {
- indices = Handle<FixedArray>();
- } else {
- int field_index = descs->GetFieldIndex(i);
- if (field_index >= map->inobject_properties()) {
- field_index = -(field_index - map->inobject_properties() + 1);
- }
- indices->set(index, Smi::FromInt(field_index));
- }
- }
- index++;
- }
- }
- ASSERT(index == storage->length());
-
- Handle<FixedArray> bridge_storage =
- isolate->factory()->NewFixedArray(
- DescriptorArray::kEnumCacheBridgeLength);
- DescriptorArray* desc = object->map()->instance_descriptors();
- desc->SetEnumCache(*bridge_storage,
- *storage,
- indices.is_null() ? Object::cast(Smi::FromInt(0))
- : Object::cast(*indices));
- if (cache_result) {
- object->map()->SetEnumLength(enum_size);
- }
-
- return ReduceFixedArrayTo(storage, enum_size);
- } else {
- Handle<NameDictionary> dictionary(object->property_dictionary());
- int length = dictionary->NumberOfEnumElements();
- if (length == 0) {
- return Handle<FixedArray>(isolate->heap()->empty_fixed_array());
- }
- Handle<FixedArray> storage = isolate->factory()->NewFixedArray(length);
- dictionary->CopyEnumKeysTo(*storage);
- return storage;
- }
-}
-
-
DeferredHandleScope::DeferredHandleScope(Isolate* isolate)
: impl_(isolate->handle_scope_implementer()) {
impl_->BeginDeferredScope();
return deferred;
}
-
-void AddWeakObjectToCodeDependency(Heap* heap,
- Handle<Object> object,
- Handle<Code> code) {
- heap->EnsureWeakObjectToCodeTable();
- Handle<DependentCode> dep(heap->LookupWeakObjectToCodeDependency(*object));
- dep = DependentCode::Insert(dep, DependentCode::kWeaklyEmbeddedGroup, code);
- CALL_HEAP_FUNCTION_VOID(heap->isolate(),
- heap->AddWeakObjectToCodeDependency(*object, *dep));
-}
-
-
} } // namespace v8::internal
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