Move V8 to external/v8
Change-Id: If68025d67453785a651c5dfb34fad298c16676a4
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
new file mode 100644
index 0000000..e2d23ef
--- /dev/null
+++ b/src/bootstrapper.cc
@@ -0,0 +1,1615 @@
+// Copyright 2006-2008 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.
+
+#include "v8.h"
+
+#include "accessors.h"
+#include "api.h"
+#include "bootstrapper.h"
+#include "compiler.h"
+#include "debug.h"
+#include "execution.h"
+#include "global-handles.h"
+#include "macro-assembler.h"
+#include "natives.h"
+
+namespace v8 {
+namespace internal {
+
+// A SourceCodeCache uses a FixedArray to store pairs of
+// (AsciiString*, JSFunction*), mapping names of native code files
+// (runtime.js, etc.) to precompiled functions. Instead of mapping
+// names to functions it might make sense to let the JS2C tool
+// generate an index for each native JS file.
+class SourceCodeCache BASE_EMBEDDED {
+ public:
+ explicit SourceCodeCache(Script::Type type): type_(type), cache_(NULL) { }
+
+ void Initialize(bool create_heap_objects) {
+ cache_ = create_heap_objects ? Heap::empty_fixed_array() : NULL;
+ }
+
+ void Iterate(ObjectVisitor* v) {
+ v->VisitPointer(bit_cast<Object**, FixedArray**>(&cache_));
+ }
+
+
+ bool Lookup(Vector<const char> name, Handle<JSFunction>* handle) {
+ for (int i = 0; i < cache_->length(); i+=2) {
+ SeqAsciiString* str = SeqAsciiString::cast(cache_->get(i));
+ if (str->IsEqualTo(name)) {
+ *handle = Handle<JSFunction>(JSFunction::cast(cache_->get(i + 1)));
+ return true;
+ }
+ }
+ return false;
+ }
+
+
+ void Add(Vector<const char> name, Handle<JSFunction> fun) {
+ ASSERT(fun->IsBoilerplate());
+ HandleScope scope;
+ int length = cache_->length();
+ Handle<FixedArray> new_array =
+ Factory::NewFixedArray(length + 2, TENURED);
+ cache_->CopyTo(0, *new_array, 0, cache_->length());
+ cache_ = *new_array;
+ Handle<String> str = Factory::NewStringFromAscii(name, TENURED);
+ cache_->set(length, *str);
+ cache_->set(length + 1, *fun);
+ Script::cast(fun->shared()->script())->set_type(Smi::FromInt(type_));
+ }
+
+ private:
+ Script::Type type_;
+ FixedArray* cache_;
+ DISALLOW_COPY_AND_ASSIGN(SourceCodeCache);
+};
+
+static SourceCodeCache natives_cache(Script::TYPE_NATIVE);
+static SourceCodeCache extensions_cache(Script::TYPE_EXTENSION);
+
+
+Handle<String> Bootstrapper::NativesSourceLookup(int index) {
+ ASSERT(0 <= index && index < Natives::GetBuiltinsCount());
+ if (Heap::natives_source_cache()->get(index)->IsUndefined()) {
+ Handle<String> source_code =
+ Factory::NewStringFromAscii(Natives::GetScriptSource(index));
+ Heap::natives_source_cache()->set(index, *source_code);
+ }
+ Handle<Object> cached_source(Heap::natives_source_cache()->get(index));
+ return Handle<String>::cast(cached_source);
+}
+
+
+bool Bootstrapper::NativesCacheLookup(Vector<const char> name,
+ Handle<JSFunction>* handle) {
+ return natives_cache.Lookup(name, handle);
+}
+
+
+void Bootstrapper::NativesCacheAdd(Vector<const char> name,
+ Handle<JSFunction> fun) {
+ natives_cache.Add(name, fun);
+}
+
+
+void Bootstrapper::Initialize(bool create_heap_objects) {
+ natives_cache.Initialize(create_heap_objects);
+ extensions_cache.Initialize(create_heap_objects);
+}
+
+
+void Bootstrapper::TearDown() {
+ natives_cache.Initialize(false); // Yes, symmetrical
+ extensions_cache.Initialize(false);
+}
+
+
+// Pending fixups are code positions that refer to builtin code
+// objects that were not available at the time the code was generated.
+// The pending list is processed whenever an environment has been
+// created.
+class PendingFixups : public AllStatic {
+ public:
+ static void Add(Code* code, MacroAssembler* masm);
+ static bool Process(Handle<JSBuiltinsObject> builtins);
+
+ static void Iterate(ObjectVisitor* v);
+
+ private:
+ static List<Object*> code_;
+ static List<const char*> name_;
+ static List<int> pc_;
+ static List<uint32_t> flags_;
+
+ static void Clear();
+};
+
+
+List<Object*> PendingFixups::code_(0);
+List<const char*> PendingFixups::name_(0);
+List<int> PendingFixups::pc_(0);
+List<uint32_t> PendingFixups::flags_(0);
+
+
+void PendingFixups::Add(Code* code, MacroAssembler* masm) {
+ // Note this code is not only called during bootstrapping.
+ List<MacroAssembler::Unresolved>* unresolved = masm->unresolved();
+ int n = unresolved->length();
+ for (int i = 0; i < n; i++) {
+ const char* name = unresolved->at(i).name;
+ code_.Add(code);
+ name_.Add(name);
+ pc_.Add(unresolved->at(i).pc);
+ flags_.Add(unresolved->at(i).flags);
+ LOG(StringEvent("unresolved", name));
+ }
+}
+
+
+bool PendingFixups::Process(Handle<JSBuiltinsObject> builtins) {
+ HandleScope scope;
+ // NOTE: Extra fixups may be added to the list during the iteration
+ // due to lazy compilation of functions during the processing. Do not
+ // cache the result of getting the length of the code list.
+ for (int i = 0; i < code_.length(); i++) {
+ const char* name = name_[i];
+ uint32_t flags = flags_[i];
+ Handle<String> symbol = Factory::LookupAsciiSymbol(name);
+ Object* o = builtins->GetProperty(*symbol);
+#ifdef DEBUG
+ if (!o->IsJSFunction()) {
+ V8_Fatal(__FILE__, __LINE__, "Cannot resolve call to builtin %s", name);
+ }
+#endif
+ Handle<JSFunction> f = Handle<JSFunction>(JSFunction::cast(o));
+ // Make sure the number of parameters match the formal parameter count.
+ int argc = Bootstrapper::FixupFlagsArgumentsCount::decode(flags);
+ USE(argc);
+ ASSERT(f->shared()->formal_parameter_count() == argc);
+ if (!f->is_compiled()) {
+ // Do lazy compilation and check for stack overflows.
+ if (!CompileLazy(f, CLEAR_EXCEPTION)) {
+ Clear();
+ return false;
+ }
+ }
+ Code* code = Code::cast(code_[i]);
+ Address pc = code->instruction_start() + pc_[i];
+ bool is_pc_relative = Bootstrapper::FixupFlagsIsPCRelative::decode(flags);
+ bool use_code_object = Bootstrapper::FixupFlagsUseCodeObject::decode(flags);
+
+ if (use_code_object) {
+ if (is_pc_relative) {
+ Assembler::set_target_address_at(
+ pc, reinterpret_cast<Address>(f->code()));
+ } else {
+ *reinterpret_cast<Object**>(pc) = f->code();
+ }
+ } else {
+ Assembler::set_target_address_at(pc, f->code()->instruction_start());
+ }
+
+ LOG(StringEvent("resolved", name));
+ }
+ Clear();
+
+ // TODO(1240818): We should probably try to avoid doing this for all
+ // the V8 builtin JS files. It should only happen after running
+ // runtime.js - just like there shouldn't be any fixups left after
+ // that.
+ for (int i = 0; i < Builtins::NumberOfJavaScriptBuiltins(); i++) {
+ Builtins::JavaScript id = static_cast<Builtins::JavaScript>(i);
+ Handle<String> name = Factory::LookupAsciiSymbol(Builtins::GetName(id));
+ JSFunction* function = JSFunction::cast(builtins->GetProperty(*name));
+ builtins->set_javascript_builtin(id, function);
+ }
+
+ return true;
+}
+
+
+void PendingFixups::Clear() {
+ code_.Clear();
+ name_.Clear();
+ pc_.Clear();
+ flags_.Clear();
+}
+
+
+void PendingFixups::Iterate(ObjectVisitor* v) {
+ if (!code_.is_empty()) {
+ v->VisitPointers(&code_[0], &code_[0] + code_.length());
+ }
+}
+
+
+class Genesis BASE_EMBEDDED {
+ public:
+ Genesis(Handle<Object> global_object,
+ v8::Handle<v8::ObjectTemplate> global_template,
+ v8::ExtensionConfiguration* extensions);
+ ~Genesis();
+
+ Handle<Context> result() { return result_; }
+
+ Genesis* previous() { return previous_; }
+ static Genesis* current() { return current_; }
+
+ // Support for thread preemption.
+ static int ArchiveSpacePerThread();
+ static char* ArchiveState(char* to);
+ static char* RestoreState(char* from);
+
+ private:
+ Handle<Context> global_context_;
+
+ // There may be more than one active genesis object: When GC is
+ // triggered during environment creation there may be weak handle
+ // processing callbacks which may create new environments.
+ Genesis* previous_;
+ static Genesis* current_;
+
+ Handle<Context> global_context() { return global_context_; }
+
+ void CreateRoots(v8::Handle<v8::ObjectTemplate> global_template,
+ Handle<Object> global_object);
+ void InstallNativeFunctions();
+ bool InstallNatives();
+ bool InstallExtensions(v8::ExtensionConfiguration* extensions);
+ bool InstallExtension(const char* name);
+ bool InstallExtension(v8::RegisteredExtension* current);
+ bool InstallSpecialObjects();
+ bool ConfigureApiObject(Handle<JSObject> object,
+ Handle<ObjectTemplateInfo> object_template);
+ bool ConfigureGlobalObjects(v8::Handle<v8::ObjectTemplate> global_template);
+
+ // Migrates all properties from the 'from' object to the 'to'
+ // object and overrides the prototype in 'to' with the one from
+ // 'from'.
+ void TransferObject(Handle<JSObject> from, Handle<JSObject> to);
+ void TransferNamedProperties(Handle<JSObject> from, Handle<JSObject> to);
+ void TransferIndexedProperties(Handle<JSObject> from, Handle<JSObject> to);
+
+ Handle<DescriptorArray> ComputeFunctionInstanceDescriptor(
+ bool make_prototype_read_only,
+ bool make_prototype_enumerable = false);
+ void MakeFunctionInstancePrototypeWritable();
+
+ void AddSpecialFunction(Handle<JSObject> prototype,
+ const char* name,
+ Handle<Code> code);
+
+ void BuildSpecialFunctionTable();
+
+ static bool CompileBuiltin(int index);
+ static bool CompileNative(Vector<const char> name, Handle<String> source);
+ static bool CompileScriptCached(Vector<const char> name,
+ Handle<String> source,
+ SourceCodeCache* cache,
+ v8::Extension* extension,
+ bool use_runtime_context);
+
+ Handle<Context> result_;
+};
+
+Genesis* Genesis::current_ = NULL;
+
+
+void Bootstrapper::Iterate(ObjectVisitor* v) {
+ natives_cache.Iterate(v);
+ extensions_cache.Iterate(v);
+ PendingFixups::Iterate(v);
+}
+
+
+// While setting up the environment, we collect code positions that
+// need to be patched before we can run any code in the environment.
+void Bootstrapper::AddFixup(Code* code, MacroAssembler* masm) {
+ PendingFixups::Add(code, masm);
+}
+
+
+bool Bootstrapper::IsActive() {
+ return Genesis::current() != NULL;
+}
+
+
+Handle<Context> Bootstrapper::CreateEnvironment(
+ Handle<Object> global_object,
+ v8::Handle<v8::ObjectTemplate> global_template,
+ v8::ExtensionConfiguration* extensions) {
+ Genesis genesis(global_object, global_template, extensions);
+ return genesis.result();
+}
+
+
+static void SetObjectPrototype(Handle<JSObject> object, Handle<Object> proto) {
+ // object.__proto__ = proto;
+ Handle<Map> old_to_map = Handle<Map>(object->map());
+ Handle<Map> new_to_map = Factory::CopyMapDropTransitions(old_to_map);
+ new_to_map->set_prototype(*proto);
+ object->set_map(*new_to_map);
+}
+
+
+void Bootstrapper::DetachGlobal(Handle<Context> env) {
+ JSGlobalProxy::cast(env->global_proxy())->set_context(*Factory::null_value());
+ SetObjectPrototype(Handle<JSObject>(env->global_proxy()),
+ Factory::null_value());
+ env->set_global_proxy(env->global());
+ env->global()->set_global_receiver(env->global());
+}
+
+
+Genesis::~Genesis() {
+ ASSERT(current_ == this);
+ current_ = previous_;
+}
+
+
+static Handle<JSFunction> InstallFunction(Handle<JSObject> target,
+ const char* name,
+ InstanceType type,
+ int instance_size,
+ Handle<JSObject> prototype,
+ Builtins::Name call,
+ bool is_ecma_native) {
+ Handle<String> symbol = Factory::LookupAsciiSymbol(name);
+ Handle<Code> call_code = Handle<Code>(Builtins::builtin(call));
+ Handle<JSFunction> function =
+ Factory::NewFunctionWithPrototype(symbol,
+ type,
+ instance_size,
+ prototype,
+ call_code,
+ is_ecma_native);
+ SetProperty(target, symbol, function, DONT_ENUM);
+ if (is_ecma_native) {
+ function->shared()->set_instance_class_name(*symbol);
+ }
+ return function;
+}
+
+
+Handle<DescriptorArray> Genesis::ComputeFunctionInstanceDescriptor(
+ bool make_prototype_read_only,
+ bool make_prototype_enumerable) {
+ Handle<DescriptorArray> result = Factory::empty_descriptor_array();
+
+ // Add prototype.
+ PropertyAttributes attributes = static_cast<PropertyAttributes>(
+ (make_prototype_enumerable ? 0 : DONT_ENUM)
+ | DONT_DELETE
+ | (make_prototype_read_only ? READ_ONLY : 0));
+ result =
+ Factory::CopyAppendProxyDescriptor(
+ result,
+ Factory::prototype_symbol(),
+ Factory::NewProxy(&Accessors::FunctionPrototype),
+ attributes);
+
+ attributes =
+ static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
+ // Add length.
+ result =
+ Factory::CopyAppendProxyDescriptor(
+ result,
+ Factory::length_symbol(),
+ Factory::NewProxy(&Accessors::FunctionLength),
+ attributes);
+
+ // Add name.
+ result =
+ Factory::CopyAppendProxyDescriptor(
+ result,
+ Factory::name_symbol(),
+ Factory::NewProxy(&Accessors::FunctionName),
+ attributes);
+
+ // Add arguments.
+ result =
+ Factory::CopyAppendProxyDescriptor(
+ result,
+ Factory::arguments_symbol(),
+ Factory::NewProxy(&Accessors::FunctionArguments),
+ attributes);
+
+ // Add caller.
+ result =
+ Factory::CopyAppendProxyDescriptor(
+ result,
+ Factory::caller_symbol(),
+ Factory::NewProxy(&Accessors::FunctionCaller),
+ attributes);
+
+ return result;
+}
+
+
+void Genesis::CreateRoots(v8::Handle<v8::ObjectTemplate> global_template,
+ Handle<Object> global_object) {
+ HandleScope scope;
+ // Allocate the global context FixedArray first and then patch the
+ // closure and extension object later (we need the empty function
+ // and the global object, but in order to create those, we need the
+ // global context).
+ global_context_ =
+ Handle<Context>::cast(
+ GlobalHandles::Create(*Factory::NewGlobalContext()));
+ Top::set_context(*global_context());
+
+ // Allocate the message listeners object.
+ v8::NeanderArray listeners;
+ global_context()->set_message_listeners(*listeners.value());
+
+ // Allocate the map for function instances.
+ Handle<Map> fm = Factory::NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
+ global_context()->set_function_instance_map(*fm);
+ // Please note that the prototype property for function instances must be
+ // writable.
+ Handle<DescriptorArray> function_map_descriptors =
+ ComputeFunctionInstanceDescriptor(false, false);
+ fm->set_instance_descriptors(*function_map_descriptors);
+
+ // Allocate the function map first and then patch the prototype later
+ fm = Factory::NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
+ global_context()->set_function_map(*fm);
+ function_map_descriptors = ComputeFunctionInstanceDescriptor(true);
+ fm->set_instance_descriptors(*function_map_descriptors);
+
+ Handle<String> object_name = Handle<String>(Heap::Object_symbol());
+
+ { // --- O b j e c t ---
+ Handle<JSFunction> object_fun =
+ Factory::NewFunction(object_name, Factory::null_value());
+ Handle<Map> object_function_map =
+ Factory::NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
+ object_fun->set_initial_map(*object_function_map);
+ object_function_map->set_constructor(*object_fun);
+
+ global_context()->set_object_function(*object_fun);
+
+ // Allocate a new prototype for the object function.
+ Handle<JSObject> prototype = Factory::NewJSObject(Top::object_function(),
+ TENURED);
+
+ global_context()->set_initial_object_prototype(*prototype);
+ SetPrototype(object_fun, prototype);
+ object_function_map->
+ set_instance_descriptors(Heap::empty_descriptor_array());
+ }
+
+ // Allocate the empty function as the prototype for function ECMAScript
+ // 262 15.3.4.
+ Handle<String> symbol = Factory::LookupAsciiSymbol("Empty");
+ Handle<JSFunction> empty_function =
+ Factory::NewFunction(symbol, Factory::null_value());
+
+ { // --- E m p t y ---
+ Handle<Code> code =
+ Handle<Code>(Builtins::builtin(Builtins::EmptyFunction));
+ empty_function->set_code(*code);
+ Handle<String> source = Factory::NewStringFromAscii(CStrVector("() {}"));
+ Handle<Script> script = Factory::NewScript(source);
+ script->set_type(Smi::FromInt(Script::TYPE_NATIVE));
+ empty_function->shared()->set_script(*script);
+ empty_function->shared()->set_start_position(0);
+ empty_function->shared()->set_end_position(source->length());
+ empty_function->shared()->DontAdaptArguments();
+ global_context()->function_map()->set_prototype(*empty_function);
+ global_context()->function_instance_map()->set_prototype(*empty_function);
+
+ // Allocate the function map first and then patch the prototype later
+ Handle<Map> empty_fm = Factory::CopyMapDropDescriptors(fm);
+ empty_fm->set_instance_descriptors(*function_map_descriptors);
+ empty_fm->set_prototype(global_context()->object_function()->prototype());
+ empty_function->set_map(*empty_fm);
+ }
+
+ { // --- G l o b a l ---
+ // Step 1: create a fresh inner JSGlobalObject
+ Handle<GlobalObject> object;
+ {
+ Handle<JSFunction> js_global_function;
+ Handle<ObjectTemplateInfo> js_global_template;
+ if (!global_template.IsEmpty()) {
+ // Get prototype template of the global_template
+ Handle<ObjectTemplateInfo> data =
+ v8::Utils::OpenHandle(*global_template);
+ Handle<FunctionTemplateInfo> global_constructor =
+ Handle<FunctionTemplateInfo>(
+ FunctionTemplateInfo::cast(data->constructor()));
+ Handle<Object> proto_template(global_constructor->prototype_template());
+ if (!proto_template->IsUndefined()) {
+ js_global_template =
+ Handle<ObjectTemplateInfo>::cast(proto_template);
+ }
+ }
+
+ if (js_global_template.is_null()) {
+ Handle<String> name = Handle<String>(Heap::empty_symbol());
+ Handle<Code> code = Handle<Code>(Builtins::builtin(Builtins::Illegal));
+ js_global_function =
+ Factory::NewFunction(name, JS_GLOBAL_OBJECT_TYPE,
+ JSGlobalObject::kSize, code, true);
+ // Change the constructor property of the prototype of the
+ // hidden global function to refer to the Object function.
+ Handle<JSObject> prototype =
+ Handle<JSObject>(
+ JSObject::cast(js_global_function->instance_prototype()));
+ SetProperty(prototype, Factory::constructor_symbol(),
+ Top::object_function(), NONE);
+ } else {
+ Handle<FunctionTemplateInfo> js_global_constructor(
+ FunctionTemplateInfo::cast(js_global_template->constructor()));
+ js_global_function =
+ Factory::CreateApiFunction(js_global_constructor,
+ Factory::InnerGlobalObject);
+ }
+
+ js_global_function->initial_map()->set_is_hidden_prototype();
+ object = Factory::NewGlobalObject(js_global_function);
+ }
+
+ // Set the global context for the global object.
+ object->set_global_context(*global_context());
+
+ // Step 2: create or re-initialize the global proxy object.
+ Handle<JSGlobalProxy> global_proxy;
+ {
+ Handle<JSFunction> global_proxy_function;
+ if (global_template.IsEmpty()) {
+ Handle<String> name = Handle<String>(Heap::empty_symbol());
+ Handle<Code> code = Handle<Code>(Builtins::builtin(Builtins::Illegal));
+ global_proxy_function =
+ Factory::NewFunction(name, JS_GLOBAL_PROXY_TYPE,
+ JSGlobalProxy::kSize, code, true);
+ } else {
+ Handle<ObjectTemplateInfo> data =
+ v8::Utils::OpenHandle(*global_template);
+ Handle<FunctionTemplateInfo> global_constructor(
+ FunctionTemplateInfo::cast(data->constructor()));
+ global_proxy_function =
+ Factory::CreateApiFunction(global_constructor,
+ Factory::OuterGlobalObject);
+ }
+
+ Handle<String> global_name = Factory::LookupAsciiSymbol("global");
+ global_proxy_function->shared()->set_instance_class_name(*global_name);
+ global_proxy_function->initial_map()->set_is_access_check_needed(true);
+
+ // Set global_proxy.__proto__ to js_global after ConfigureGlobalObjects
+
+ if (global_object.location() != NULL) {
+ ASSERT(global_object->IsJSGlobalProxy());
+ global_proxy =
+ ReinitializeJSGlobalProxy(
+ global_proxy_function,
+ Handle<JSGlobalProxy>::cast(global_object));
+ } else {
+ global_proxy = Handle<JSGlobalProxy>::cast(
+ Factory::NewJSObject(global_proxy_function, TENURED));
+ }
+
+ // Security setup: Set the security token of the global object to
+ // its the inner global. This makes the security check between two
+ // different contexts fail by default even in case of global
+ // object reinitialization.
+ object->set_global_receiver(*global_proxy);
+ global_proxy->set_context(*global_context());
+ }
+
+ { // --- G l o b a l C o n t e x t ---
+ // use the empty function as closure (no scope info)
+ global_context()->set_closure(*empty_function);
+ global_context()->set_fcontext(*global_context());
+ global_context()->set_previous(NULL);
+
+ // set extension and global object
+ global_context()->set_extension(*object);
+ global_context()->set_global(*object);
+ global_context()->set_global_proxy(*global_proxy);
+ // use inner global object as security token by default
+ global_context()->set_security_token(*object);
+ }
+
+ Handle<JSObject> global = Handle<JSObject>(global_context()->global());
+ SetProperty(global, object_name, Top::object_function(), DONT_ENUM);
+ }
+
+ Handle<JSObject> global = Handle<JSObject>(global_context()->global());
+
+ // Install global Function object
+ InstallFunction(global, "Function", JS_FUNCTION_TYPE, JSFunction::kSize,
+ empty_function, Builtins::Illegal, true); // ECMA native.
+
+ { // --- A r r a y ---
+ Handle<JSFunction> array_function =
+ InstallFunction(global, "Array", JS_ARRAY_TYPE, JSArray::kSize,
+ Top::initial_object_prototype(), Builtins::ArrayCode,
+ true);
+ array_function->shared()->set_construct_stub(
+ Builtins::builtin(Builtins::ArrayConstructCode));
+ array_function->shared()->DontAdaptArguments();
+
+ // This seems a bit hackish, but we need to make sure Array.length
+ // is 1.
+ array_function->shared()->set_length(1);
+ Handle<DescriptorArray> array_descriptors =
+ Factory::CopyAppendProxyDescriptor(
+ Factory::empty_descriptor_array(),
+ Factory::length_symbol(),
+ Factory::NewProxy(&Accessors::ArrayLength),
+ static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE));
+
+ // Cache the fast JavaScript array map
+ global_context()->set_js_array_map(array_function->initial_map());
+ global_context()->js_array_map()->set_instance_descriptors(
+ *array_descriptors);
+ // array_function is used internally. JS code creating array object should
+ // search for the 'Array' property on the global object and use that one
+ // as the constructor. 'Array' property on a global object can be
+ // overwritten by JS code.
+ global_context()->set_array_function(*array_function);
+ }
+
+ { // --- N u m b e r ---
+ Handle<JSFunction> number_fun =
+ InstallFunction(global, "Number", JS_VALUE_TYPE, JSValue::kSize,
+ Top::initial_object_prototype(), Builtins::Illegal,
+ true);
+ global_context()->set_number_function(*number_fun);
+ }
+
+ { // --- B o o l e a n ---
+ Handle<JSFunction> boolean_fun =
+ InstallFunction(global, "Boolean", JS_VALUE_TYPE, JSValue::kSize,
+ Top::initial_object_prototype(), Builtins::Illegal,
+ true);
+ global_context()->set_boolean_function(*boolean_fun);
+ }
+
+ { // --- S t r i n g ---
+ Handle<JSFunction> string_fun =
+ InstallFunction(global, "String", JS_VALUE_TYPE, JSValue::kSize,
+ Top::initial_object_prototype(), Builtins::Illegal,
+ true);
+ global_context()->set_string_function(*string_fun);
+ // Add 'length' property to strings.
+ Handle<DescriptorArray> string_descriptors =
+ Factory::CopyAppendProxyDescriptor(
+ Factory::empty_descriptor_array(),
+ Factory::length_symbol(),
+ Factory::NewProxy(&Accessors::StringLength),
+ static_cast<PropertyAttributes>(DONT_ENUM |
+ DONT_DELETE |
+ READ_ONLY));
+
+ Handle<Map> string_map =
+ Handle<Map>(global_context()->string_function()->initial_map());
+ string_map->set_instance_descriptors(*string_descriptors);
+ }
+
+ { // --- D a t e ---
+ // Builtin functions for Date.prototype.
+ Handle<JSFunction> date_fun =
+ InstallFunction(global, "Date", JS_VALUE_TYPE, JSValue::kSize,
+ Top::initial_object_prototype(), Builtins::Illegal,
+ true);
+
+ global_context()->set_date_function(*date_fun);
+ }
+
+
+ { // -- R e g E x p
+ // Builtin functions for RegExp.prototype.
+ Handle<JSFunction> regexp_fun =
+ InstallFunction(global, "RegExp", JS_REGEXP_TYPE, JSRegExp::kSize,
+ Top::initial_object_prototype(), Builtins::Illegal,
+ true);
+
+ global_context()->set_regexp_function(*regexp_fun);
+ }
+
+ { // -- J S O N
+ Handle<String> name = Factory::NewStringFromAscii(CStrVector("JSON"));
+ Handle<JSFunction> cons = Factory::NewFunction(
+ name,
+ Factory::the_hole_value());
+ cons->SetInstancePrototype(global_context()->initial_object_prototype());
+ cons->SetInstanceClassName(*name);
+ Handle<JSObject> json_object = Factory::NewJSObject(cons, TENURED);
+ ASSERT(json_object->IsJSObject());
+ SetProperty(global, name, json_object, DONT_ENUM);
+ global_context()->set_json_object(*json_object);
+ }
+
+ { // --- arguments_boilerplate_
+ // Make sure we can recognize argument objects at runtime.
+ // This is done by introducing an anonymous function with
+ // class_name equals 'Arguments'.
+ Handle<String> symbol = Factory::LookupAsciiSymbol("Arguments");
+ Handle<Code> code = Handle<Code>(Builtins::builtin(Builtins::Illegal));
+ Handle<JSObject> prototype =
+ Handle<JSObject>(
+ JSObject::cast(global_context()->object_function()->prototype()));
+
+ Handle<JSFunction> function =
+ Factory::NewFunctionWithPrototype(symbol,
+ JS_OBJECT_TYPE,
+ JSObject::kHeaderSize,
+ prototype,
+ code,
+ false);
+ ASSERT(!function->has_initial_map());
+ function->shared()->set_instance_class_name(*symbol);
+ function->shared()->set_expected_nof_properties(2);
+ Handle<JSObject> result = Factory::NewJSObject(function);
+
+ global_context()->set_arguments_boilerplate(*result);
+ // Note: callee must be added as the first property and
+ // length must be added as the second property.
+ SetProperty(result, Factory::callee_symbol(),
+ Factory::undefined_value(),
+ DONT_ENUM);
+ SetProperty(result, Factory::length_symbol(),
+ Factory::undefined_value(),
+ DONT_ENUM);
+
+#ifdef DEBUG
+ LookupResult lookup;
+ result->LocalLookup(Heap::callee_symbol(), &lookup);
+ ASSERT(lookup.IsValid() && (lookup.type() == FIELD));
+ ASSERT(lookup.GetFieldIndex() == Heap::arguments_callee_index);
+
+ result->LocalLookup(Heap::length_symbol(), &lookup);
+ ASSERT(lookup.IsValid() && (lookup.type() == FIELD));
+ ASSERT(lookup.GetFieldIndex() == Heap::arguments_length_index);
+
+ ASSERT(result->map()->inobject_properties() > Heap::arguments_callee_index);
+ ASSERT(result->map()->inobject_properties() > Heap::arguments_length_index);
+
+ // Check the state of the object.
+ ASSERT(result->HasFastProperties());
+ ASSERT(result->HasFastElements());
+#endif
+ }
+
+ { // --- context extension
+ // Create a function for the context extension objects.
+ Handle<Code> code = Handle<Code>(Builtins::builtin(Builtins::Illegal));
+ Handle<JSFunction> context_extension_fun =
+ Factory::NewFunction(Factory::empty_symbol(),
+ JS_CONTEXT_EXTENSION_OBJECT_TYPE,
+ JSObject::kHeaderSize,
+ code,
+ true);
+
+ Handle<String> name = Factory::LookupAsciiSymbol("context_extension");
+ context_extension_fun->shared()->set_instance_class_name(*name);
+ global_context()->set_context_extension_function(*context_extension_fun);
+ }
+
+
+ {
+ // Setup the call-as-function delegate.
+ Handle<Code> code =
+ Handle<Code>(Builtins::builtin(Builtins::HandleApiCallAsFunction));
+ Handle<JSFunction> delegate =
+ Factory::NewFunction(Factory::empty_symbol(), JS_OBJECT_TYPE,
+ JSObject::kHeaderSize, code, true);
+ global_context()->set_call_as_function_delegate(*delegate);
+ delegate->shared()->DontAdaptArguments();
+ }
+
+ {
+ // Setup the call-as-constructor delegate.
+ Handle<Code> code =
+ Handle<Code>(Builtins::builtin(Builtins::HandleApiCallAsConstructor));
+ Handle<JSFunction> delegate =
+ Factory::NewFunction(Factory::empty_symbol(), JS_OBJECT_TYPE,
+ JSObject::kHeaderSize, code, true);
+ global_context()->set_call_as_constructor_delegate(*delegate);
+ delegate->shared()->DontAdaptArguments();
+ }
+
+ global_context()->set_special_function_table(Heap::empty_fixed_array());
+
+ // Initialize the out of memory slot.
+ global_context()->set_out_of_memory(Heap::false_value());
+
+ // Initialize the data slot.
+ global_context()->set_data(Heap::undefined_value());
+}
+
+
+bool Genesis::CompileBuiltin(int index) {
+ Vector<const char> name = Natives::GetScriptName(index);
+ Handle<String> source_code = Bootstrapper::NativesSourceLookup(index);
+ return CompileNative(name, source_code);
+}
+
+
+bool Genesis::CompileNative(Vector<const char> name, Handle<String> source) {
+ HandleScope scope;
+#ifdef ENABLE_DEBUGGER_SUPPORT
+ Debugger::set_compiling_natives(true);
+#endif
+ bool result =
+ CompileScriptCached(name, source, &natives_cache, NULL, true);
+ ASSERT(Top::has_pending_exception() != result);
+ if (!result) Top::clear_pending_exception();
+#ifdef ENABLE_DEBUGGER_SUPPORT
+ Debugger::set_compiling_natives(false);
+#endif
+ return result;
+}
+
+
+bool Genesis::CompileScriptCached(Vector<const char> name,
+ Handle<String> source,
+ SourceCodeCache* cache,
+ v8::Extension* extension,
+ bool use_runtime_context) {
+ HandleScope scope;
+ Handle<JSFunction> boilerplate;
+
+ // If we can't find the function in the cache, we compile a new
+ // function and insert it into the cache.
+ if (!cache->Lookup(name, &boilerplate)) {
+ ASSERT(source->IsAsciiRepresentation());
+ Handle<String> script_name = Factory::NewStringFromUtf8(name);
+ boilerplate =
+ Compiler::Compile(source, script_name, 0, 0, extension, NULL);
+ if (boilerplate.is_null()) return false;
+ cache->Add(name, boilerplate);
+ }
+
+ // Setup the function context. Conceptually, we should clone the
+ // function before overwriting the context but since we're in a
+ // single-threaded environment it is not strictly necessary.
+ ASSERT(Top::context()->IsGlobalContext());
+ Handle<Context> context =
+ Handle<Context>(use_runtime_context
+ ? Top::context()->runtime_context()
+ : Top::context());
+ Handle<JSFunction> fun =
+ Factory::NewFunctionFromBoilerplate(boilerplate, context);
+
+ // Call function using the either the runtime object or the global
+ // object as the receiver. Provide no parameters.
+ Handle<Object> receiver =
+ Handle<Object>(use_runtime_context
+ ? Top::context()->builtins()
+ : Top::context()->global());
+ bool has_pending_exception;
+ Handle<Object> result =
+ Execution::Call(fun, receiver, 0, NULL, &has_pending_exception);
+ if (has_pending_exception) return false;
+ return PendingFixups::Process(
+ Handle<JSBuiltinsObject>(Top::context()->builtins()));
+}
+
+
+#define INSTALL_NATIVE(Type, name, var) \
+ Handle<String> var##_name = Factory::LookupAsciiSymbol(name); \
+ global_context()->set_##var(Type::cast(global_context()-> \
+ builtins()-> \
+ GetProperty(*var##_name)));
+
+void Genesis::InstallNativeFunctions() {
+ HandleScope scope;
+ INSTALL_NATIVE(JSFunction, "CreateDate", create_date_fun);
+ INSTALL_NATIVE(JSFunction, "ToNumber", to_number_fun);
+ INSTALL_NATIVE(JSFunction, "ToString", to_string_fun);
+ INSTALL_NATIVE(JSFunction, "ToDetailString", to_detail_string_fun);
+ INSTALL_NATIVE(JSFunction, "ToObject", to_object_fun);
+ INSTALL_NATIVE(JSFunction, "ToInteger", to_integer_fun);
+ INSTALL_NATIVE(JSFunction, "ToUint32", to_uint32_fun);
+ INSTALL_NATIVE(JSFunction, "ToInt32", to_int32_fun);
+ INSTALL_NATIVE(JSFunction, "ToBoolean", to_boolean_fun);
+ INSTALL_NATIVE(JSFunction, "Instantiate", instantiate_fun);
+ INSTALL_NATIVE(JSFunction, "ConfigureTemplateInstance",
+ configure_instance_fun);
+ INSTALL_NATIVE(JSFunction, "MakeMessage", make_message_fun);
+ INSTALL_NATIVE(JSFunction, "GetStackTraceLine", get_stack_trace_line_fun);
+ INSTALL_NATIVE(JSObject, "functionCache", function_cache);
+}
+
+#undef INSTALL_NATIVE
+
+
+bool Genesis::InstallNatives() {
+ HandleScope scope;
+
+ // Create a function for the builtins object. Allocate space for the
+ // JavaScript builtins, a reference to the builtins object
+ // (itself) and a reference to the global_context directly in the object.
+ Handle<Code> code = Handle<Code>(Builtins::builtin(Builtins::Illegal));
+ Handle<JSFunction> builtins_fun =
+ Factory::NewFunction(Factory::empty_symbol(), JS_BUILTINS_OBJECT_TYPE,
+ JSBuiltinsObject::kSize, code, true);
+
+ Handle<String> name = Factory::LookupAsciiSymbol("builtins");
+ builtins_fun->shared()->set_instance_class_name(*name);
+
+ // Allocate the builtins object.
+ Handle<JSBuiltinsObject> builtins =
+ Handle<JSBuiltinsObject>::cast(Factory::NewGlobalObject(builtins_fun));
+ builtins->set_builtins(*builtins);
+ builtins->set_global_context(*global_context());
+ builtins->set_global_receiver(*builtins);
+
+ // Setup the 'global' properties of the builtins object. The
+ // 'global' property that refers to the global object is the only
+ // way to get from code running in the builtins context to the
+ // global object.
+ static const PropertyAttributes attributes =
+ static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE);
+ SetProperty(builtins, Factory::LookupAsciiSymbol("global"),
+ Handle<Object>(global_context()->global()), attributes);
+
+ // Setup the reference from the global object to the builtins object.
+ JSGlobalObject::cast(global_context()->global())->set_builtins(*builtins);
+
+ // Create a bridge function that has context in the global context.
+ Handle<JSFunction> bridge =
+ Factory::NewFunction(Factory::empty_symbol(), Factory::undefined_value());
+ ASSERT(bridge->context() == *Top::global_context());
+
+ // Allocate the builtins context.
+ Handle<Context> context =
+ Factory::NewFunctionContext(Context::MIN_CONTEXT_SLOTS, bridge);
+ context->set_global(*builtins); // override builtins global object
+
+ global_context()->set_runtime_context(*context);
+
+ { // -- S c r i p t
+ // Builtin functions for Script.
+ Handle<JSFunction> script_fun =
+ InstallFunction(builtins, "Script", JS_VALUE_TYPE, JSValue::kSize,
+ Top::initial_object_prototype(), Builtins::Illegal,
+ false);
+ Handle<JSObject> prototype =
+ Factory::NewJSObject(Top::object_function(), TENURED);
+ SetPrototype(script_fun, prototype);
+ global_context()->set_script_function(*script_fun);
+
+ // Add 'source' and 'data' property to scripts.
+ PropertyAttributes common_attributes =
+ static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
+ Handle<Proxy> proxy_source = Factory::NewProxy(&Accessors::ScriptSource);
+ Handle<DescriptorArray> script_descriptors =
+ Factory::CopyAppendProxyDescriptor(
+ Factory::empty_descriptor_array(),
+ Factory::LookupAsciiSymbol("source"),
+ proxy_source,
+ common_attributes);
+ Handle<Proxy> proxy_name = Factory::NewProxy(&Accessors::ScriptName);
+ script_descriptors =
+ Factory::CopyAppendProxyDescriptor(
+ script_descriptors,
+ Factory::LookupAsciiSymbol("name"),
+ proxy_name,
+ common_attributes);
+ Handle<Proxy> proxy_id = Factory::NewProxy(&Accessors::ScriptId);
+ script_descriptors =
+ Factory::CopyAppendProxyDescriptor(
+ script_descriptors,
+ Factory::LookupAsciiSymbol("id"),
+ proxy_id,
+ common_attributes);
+ Handle<Proxy> proxy_line_offset =
+ Factory::NewProxy(&Accessors::ScriptLineOffset);
+ script_descriptors =
+ Factory::CopyAppendProxyDescriptor(
+ script_descriptors,
+ Factory::LookupAsciiSymbol("line_offset"),
+ proxy_line_offset,
+ common_attributes);
+ Handle<Proxy> proxy_column_offset =
+ Factory::NewProxy(&Accessors::ScriptColumnOffset);
+ script_descriptors =
+ Factory::CopyAppendProxyDescriptor(
+ script_descriptors,
+ Factory::LookupAsciiSymbol("column_offset"),
+ proxy_column_offset,
+ common_attributes);
+ Handle<Proxy> proxy_data = Factory::NewProxy(&Accessors::ScriptData);
+ script_descriptors =
+ Factory::CopyAppendProxyDescriptor(
+ script_descriptors,
+ Factory::LookupAsciiSymbol("data"),
+ proxy_data,
+ common_attributes);
+ Handle<Proxy> proxy_type = Factory::NewProxy(&Accessors::ScriptType);
+ script_descriptors =
+ Factory::CopyAppendProxyDescriptor(
+ script_descriptors,
+ Factory::LookupAsciiSymbol("type"),
+ proxy_type,
+ common_attributes);
+ Handle<Proxy> proxy_compilation_type =
+ Factory::NewProxy(&Accessors::ScriptCompilationType);
+ script_descriptors =
+ Factory::CopyAppendProxyDescriptor(
+ script_descriptors,
+ Factory::LookupAsciiSymbol("compilation_type"),
+ proxy_compilation_type,
+ common_attributes);
+ Handle<Proxy> proxy_line_ends =
+ Factory::NewProxy(&Accessors::ScriptLineEnds);
+ script_descriptors =
+ Factory::CopyAppendProxyDescriptor(
+ script_descriptors,
+ Factory::LookupAsciiSymbol("line_ends"),
+ proxy_line_ends,
+ common_attributes);
+ Handle<Proxy> proxy_context_data =
+ Factory::NewProxy(&Accessors::ScriptContextData);
+ script_descriptors =
+ Factory::CopyAppendProxyDescriptor(
+ script_descriptors,
+ Factory::LookupAsciiSymbol("context_data"),
+ proxy_context_data,
+ common_attributes);
+ Handle<Proxy> proxy_eval_from_function =
+ Factory::NewProxy(&Accessors::ScriptEvalFromFunction);
+ script_descriptors =
+ Factory::CopyAppendProxyDescriptor(
+ script_descriptors,
+ Factory::LookupAsciiSymbol("eval_from_function"),
+ proxy_eval_from_function,
+ common_attributes);
+ Handle<Proxy> proxy_eval_from_position =
+ Factory::NewProxy(&Accessors::ScriptEvalFromPosition);
+ script_descriptors =
+ Factory::CopyAppendProxyDescriptor(
+ script_descriptors,
+ Factory::LookupAsciiSymbol("eval_from_position"),
+ proxy_eval_from_position,
+ common_attributes);
+
+ Handle<Map> script_map = Handle<Map>(script_fun->initial_map());
+ script_map->set_instance_descriptors(*script_descriptors);
+
+ // Allocate the empty script.
+ Handle<Script> script = Factory::NewScript(Factory::empty_string());
+ script->set_type(Smi::FromInt(Script::TYPE_NATIVE));
+ global_context()->set_empty_script(*script);
+ }
+
+ if (FLAG_natives_file == NULL) {
+ // Without natives file, install default natives.
+ for (int i = Natives::GetDelayCount();
+ i < Natives::GetBuiltinsCount();
+ i++) {
+ if (!CompileBuiltin(i)) return false;
+ }
+
+ // Setup natives with lazy loading.
+ SetupLazy(Handle<JSFunction>(global_context()->date_function()),
+ Natives::GetIndex("date"),
+ Top::global_context(),
+ Handle<Context>(Top::context()->runtime_context()));
+ SetupLazy(Handle<JSFunction>(global_context()->regexp_function()),
+ Natives::GetIndex("regexp"),
+ Top::global_context(),
+ Handle<Context>(Top::context()->runtime_context()));
+ SetupLazy(Handle<JSObject>(global_context()->json_object()),
+ Natives::GetIndex("json"),
+ Top::global_context(),
+ Handle<Context>(Top::context()->runtime_context()));
+
+ } else if (strlen(FLAG_natives_file) != 0) {
+ // Otherwise install natives from natives file if file exists and
+ // compiles.
+ bool exists;
+ Vector<const char> source = ReadFile(FLAG_natives_file, &exists);
+ Handle<String> source_string = Factory::NewStringFromAscii(source);
+ if (source.is_empty()) return false;
+ bool result = CompileNative(CStrVector(FLAG_natives_file), source_string);
+ if (!result) return false;
+
+ } else {
+ // Empty natives file name - do not install any natives.
+ PrintF("Warning: Running without installed natives!\n");
+ return true;
+ }
+
+ InstallNativeFunctions();
+
+ // Install Function.prototype.call and apply.
+ { Handle<String> key = Factory::function_class_symbol();
+ Handle<JSFunction> function =
+ Handle<JSFunction>::cast(GetProperty(Top::global(), key));
+ Handle<JSObject> proto =
+ Handle<JSObject>(JSObject::cast(function->instance_prototype()));
+
+ // Install the call and the apply functions.
+ Handle<JSFunction> call =
+ InstallFunction(proto, "call", JS_OBJECT_TYPE, JSObject::kHeaderSize,
+ Factory::NewJSObject(Top::object_function(), TENURED),
+ Builtins::FunctionCall,
+ false);
+ Handle<JSFunction> apply =
+ InstallFunction(proto, "apply", JS_OBJECT_TYPE, JSObject::kHeaderSize,
+ Factory::NewJSObject(Top::object_function(), TENURED),
+ Builtins::FunctionApply,
+ false);
+
+ // Make sure that Function.prototype.call appears to be compiled.
+ // The code will never be called, but inline caching for call will
+ // only work if it appears to be compiled.
+ call->shared()->DontAdaptArguments();
+ ASSERT(call->is_compiled());
+
+ // Set the expected parameters for apply to 2; required by builtin.
+ apply->shared()->set_formal_parameter_count(2);
+
+ // Set the lengths for the functions to satisfy ECMA-262.
+ call->shared()->set_length(1);
+ apply->shared()->set_length(2);
+ }
+
+#ifdef DEBUG
+ builtins->Verify();
+#endif
+ return true;
+}
+
+
+bool Genesis::InstallSpecialObjects() {
+ HandleScope scope;
+ Handle<JSGlobalObject> js_global(
+ JSGlobalObject::cast(global_context()->global()));
+ // Expose the natives in global if a name for it is specified.
+ if (FLAG_expose_natives_as != NULL && strlen(FLAG_expose_natives_as) != 0) {
+ Handle<String> natives_string =
+ Factory::LookupAsciiSymbol(FLAG_expose_natives_as);
+ SetProperty(js_global, natives_string,
+ Handle<JSObject>(js_global->builtins()), DONT_ENUM);
+ }
+
+ Handle<Object> Error = GetProperty(js_global, "Error");
+ if (Error->IsJSObject()) {
+ Handle<String> name = Factory::LookupAsciiSymbol("stackTraceLimit");
+ SetProperty(Handle<JSObject>::cast(Error),
+ name,
+ Handle<Smi>(Smi::FromInt(FLAG_stack_trace_limit)),
+ NONE);
+ }
+
+#ifdef ENABLE_DEBUGGER_SUPPORT
+ // Expose the debug global object in global if a name for it is specified.
+ if (FLAG_expose_debug_as != NULL && strlen(FLAG_expose_debug_as) != 0) {
+ // If loading fails we just bail out without installing the
+ // debugger but without tanking the whole context.
+ if (!Debug::Load())
+ return true;
+ // Set the security token for the debugger context to the same as
+ // the shell global context to allow calling between these (otherwise
+ // exposing debug global object doesn't make much sense).
+ Debug::debug_context()->set_security_token(
+ global_context()->security_token());
+
+ Handle<String> debug_string =
+ Factory::LookupAsciiSymbol(FLAG_expose_debug_as);
+ SetProperty(js_global, debug_string,
+ Handle<Object>(Debug::debug_context()->global_proxy()), DONT_ENUM);
+ }
+#endif
+
+ return true;
+}
+
+
+bool Genesis::InstallExtensions(v8::ExtensionConfiguration* extensions) {
+ // Clear coloring of extension list
+ v8::RegisteredExtension* current = v8::RegisteredExtension::first_extension();
+ while (current != NULL) {
+ current->set_state(v8::UNVISITED);
+ current = current->next();
+ }
+ // Install auto extensions
+ current = v8::RegisteredExtension::first_extension();
+ while (current != NULL) {
+ if (current->extension()->auto_enable())
+ InstallExtension(current);
+ current = current->next();
+ }
+
+ if (FLAG_expose_gc) InstallExtension("v8/gc");
+
+ if (extensions == NULL) return true;
+ // Install required extensions
+ int count = v8::ImplementationUtilities::GetNameCount(extensions);
+ const char** names = v8::ImplementationUtilities::GetNames(extensions);
+ for (int i = 0; i < count; i++) {
+ if (!InstallExtension(names[i]))
+ return false;
+ }
+
+ return true;
+}
+
+
+// Installs a named extension. This methods is unoptimized and does
+// not scale well if we want to support a large number of extensions.
+bool Genesis::InstallExtension(const char* name) {
+ v8::RegisteredExtension* current = v8::RegisteredExtension::first_extension();
+ // Loop until we find the relevant extension
+ while (current != NULL) {
+ if (strcmp(name, current->extension()->name()) == 0) break;
+ current = current->next();
+ }
+ // Didn't find the extension; fail.
+ if (current == NULL) {
+ v8::Utils::ReportApiFailure(
+ "v8::Context::New()", "Cannot find required extension");
+ return false;
+ }
+ return InstallExtension(current);
+}
+
+
+bool Genesis::InstallExtension(v8::RegisteredExtension* current) {
+ HandleScope scope;
+
+ if (current->state() == v8::INSTALLED) return true;
+ // The current node has already been visited so there must be a
+ // cycle in the dependency graph; fail.
+ if (current->state() == v8::VISITED) {
+ v8::Utils::ReportApiFailure(
+ "v8::Context::New()", "Circular extension dependency");
+ return false;
+ }
+ ASSERT(current->state() == v8::UNVISITED);
+ current->set_state(v8::VISITED);
+ v8::Extension* extension = current->extension();
+ // Install the extension's dependencies
+ for (int i = 0; i < extension->dependency_count(); i++) {
+ if (!InstallExtension(extension->dependencies()[i])) return false;
+ }
+ Vector<const char> source = CStrVector(extension->source());
+ Handle<String> source_code = Factory::NewStringFromAscii(source);
+ bool result = CompileScriptCached(CStrVector(extension->name()),
+ source_code,
+ &extensions_cache, extension,
+ false);
+ ASSERT(Top::has_pending_exception() != result);
+ if (!result) {
+ Top::clear_pending_exception();
+ v8::Utils::ReportApiFailure(
+ "v8::Context::New()", "Error installing extension");
+ }
+ current->set_state(v8::INSTALLED);
+ return result;
+}
+
+
+bool Genesis::ConfigureGlobalObjects(
+ v8::Handle<v8::ObjectTemplate> global_proxy_template) {
+ Handle<JSObject> global_proxy(
+ JSObject::cast(global_context()->global_proxy()));
+ Handle<JSObject> js_global(JSObject::cast(global_context()->global()));
+
+ if (!global_proxy_template.IsEmpty()) {
+ // Configure the global proxy object.
+ Handle<ObjectTemplateInfo> proxy_data =
+ v8::Utils::OpenHandle(*global_proxy_template);
+ if (!ConfigureApiObject(global_proxy, proxy_data)) return false;
+
+ // Configure the inner global object.
+ Handle<FunctionTemplateInfo> proxy_constructor(
+ FunctionTemplateInfo::cast(proxy_data->constructor()));
+ if (!proxy_constructor->prototype_template()->IsUndefined()) {
+ Handle<ObjectTemplateInfo> inner_data(
+ ObjectTemplateInfo::cast(proxy_constructor->prototype_template()));
+ if (!ConfigureApiObject(js_global, inner_data)) return false;
+ }
+ }
+
+ SetObjectPrototype(global_proxy, js_global);
+ return true;
+}
+
+
+bool Genesis::ConfigureApiObject(Handle<JSObject> object,
+ Handle<ObjectTemplateInfo> object_template) {
+ ASSERT(!object_template.is_null());
+ ASSERT(object->IsInstanceOf(
+ FunctionTemplateInfo::cast(object_template->constructor())));
+
+ bool pending_exception = false;
+ Handle<JSObject> obj =
+ Execution::InstantiateObject(object_template, &pending_exception);
+ if (pending_exception) {
+ ASSERT(Top::has_pending_exception());
+ Top::clear_pending_exception();
+ return false;
+ }
+ TransferObject(obj, object);
+ return true;
+}
+
+
+void Genesis::TransferNamedProperties(Handle<JSObject> from,
+ Handle<JSObject> to) {
+ if (from->HasFastProperties()) {
+ Handle<DescriptorArray> descs =
+ Handle<DescriptorArray>(from->map()->instance_descriptors());
+ for (int i = 0; i < descs->number_of_descriptors(); i++) {
+ PropertyDetails details = PropertyDetails(descs->GetDetails(i));
+ switch (details.type()) {
+ case FIELD: {
+ HandleScope inner;
+ Handle<String> key = Handle<String>(descs->GetKey(i));
+ int index = descs->GetFieldIndex(i);
+ Handle<Object> value = Handle<Object>(from->FastPropertyAt(index));
+ SetProperty(to, key, value, details.attributes());
+ break;
+ }
+ case CONSTANT_FUNCTION: {
+ HandleScope inner;
+ Handle<String> key = Handle<String>(descs->GetKey(i));
+ Handle<JSFunction> fun =
+ Handle<JSFunction>(descs->GetConstantFunction(i));
+ SetProperty(to, key, fun, details.attributes());
+ break;
+ }
+ case CALLBACKS: {
+ LookupResult result;
+ to->LocalLookup(descs->GetKey(i), &result);
+ // If the property is already there we skip it
+ if (result.IsValid()) continue;
+ HandleScope inner;
+ Handle<DescriptorArray> inst_descs =
+ Handle<DescriptorArray>(to->map()->instance_descriptors());
+ Handle<String> key = Handle<String>(descs->GetKey(i));
+ Handle<Object> entry = Handle<Object>(descs->GetCallbacksObject(i));
+ inst_descs = Factory::CopyAppendProxyDescriptor(inst_descs,
+ key,
+ entry,
+ details.attributes());
+ to->map()->set_instance_descriptors(*inst_descs);
+ break;
+ }
+ case MAP_TRANSITION:
+ case CONSTANT_TRANSITION:
+ case NULL_DESCRIPTOR:
+ // Ignore non-properties.
+ break;
+ case NORMAL:
+ // Do not occur since the from object has fast properties.
+ case INTERCEPTOR:
+ // No element in instance descriptors have interceptor type.
+ UNREACHABLE();
+ break;
+ }
+ }
+ } else {
+ Handle<StringDictionary> properties =
+ Handle<StringDictionary>(from->property_dictionary());
+ int capacity = properties->Capacity();
+ for (int i = 0; i < capacity; i++) {
+ Object* raw_key(properties->KeyAt(i));
+ if (properties->IsKey(raw_key)) {
+ ASSERT(raw_key->IsString());
+ // If the property is already there we skip it.
+ LookupResult result;
+ to->LocalLookup(String::cast(raw_key), &result);
+ if (result.IsValid()) continue;
+ // Set the property.
+ Handle<String> key = Handle<String>(String::cast(raw_key));
+ Handle<Object> value = Handle<Object>(properties->ValueAt(i));
+ if (value->IsJSGlobalPropertyCell()) {
+ value = Handle<Object>(JSGlobalPropertyCell::cast(*value)->value());
+ }
+ PropertyDetails details = properties->DetailsAt(i);
+ SetProperty(to, key, value, details.attributes());
+ }
+ }
+ }
+}
+
+
+void Genesis::TransferIndexedProperties(Handle<JSObject> from,
+ Handle<JSObject> to) {
+ // Cloning the elements array is sufficient.
+ Handle<FixedArray> from_elements =
+ Handle<FixedArray>(FixedArray::cast(from->elements()));
+ Handle<FixedArray> to_elements = Factory::CopyFixedArray(from_elements);
+ to->set_elements(*to_elements);
+}
+
+
+void Genesis::TransferObject(Handle<JSObject> from, Handle<JSObject> to) {
+ HandleScope outer;
+
+ ASSERT(!from->IsJSArray());
+ ASSERT(!to->IsJSArray());
+
+ TransferNamedProperties(from, to);
+ TransferIndexedProperties(from, to);
+
+ // Transfer the prototype (new map is needed).
+ Handle<Map> old_to_map = Handle<Map>(to->map());
+ Handle<Map> new_to_map = Factory::CopyMapDropTransitions(old_to_map);
+ new_to_map->set_prototype(from->map()->prototype());
+ to->set_map(*new_to_map);
+}
+
+
+void Genesis::MakeFunctionInstancePrototypeWritable() {
+ // Make a new function map so all future functions
+ // will have settable and enumerable prototype properties.
+ HandleScope scope;
+
+ Handle<DescriptorArray> function_map_descriptors =
+ ComputeFunctionInstanceDescriptor(false);
+ Handle<Map> fm = Factory::CopyMapDropDescriptors(Top::function_map());
+ fm->set_instance_descriptors(*function_map_descriptors);
+ Top::context()->global_context()->set_function_map(*fm);
+}
+
+
+void Genesis::AddSpecialFunction(Handle<JSObject> prototype,
+ const char* name,
+ Handle<Code> code) {
+ Handle<String> key = Factory::LookupAsciiSymbol(name);
+ Handle<Object> value = Handle<Object>(prototype->GetProperty(*key));
+ if (value->IsJSFunction()) {
+ Handle<JSFunction> optimized = Factory::NewFunction(key,
+ JS_OBJECT_TYPE,
+ JSObject::kHeaderSize,
+ code,
+ false);
+ optimized->shared()->DontAdaptArguments();
+ int len = global_context()->special_function_table()->length();
+ Handle<FixedArray> new_array = Factory::NewFixedArray(len + 3);
+ for (int index = 0; index < len; index++) {
+ new_array->set(index,
+ global_context()->special_function_table()->get(index));
+ }
+ new_array->set(len+0, *prototype);
+ new_array->set(len+1, *value);
+ new_array->set(len+2, *optimized);
+ global_context()->set_special_function_table(*new_array);
+ }
+}
+
+
+void Genesis::BuildSpecialFunctionTable() {
+ HandleScope scope;
+ Handle<JSObject> global = Handle<JSObject>(global_context()->global());
+ // Add special versions for Array.prototype.pop and push.
+ Handle<JSFunction> function =
+ Handle<JSFunction>(
+ JSFunction::cast(global->GetProperty(Heap::Array_symbol())));
+ Handle<JSObject> visible_prototype =
+ Handle<JSObject>(JSObject::cast(function->prototype()));
+ // Remember to put push and pop on the hidden prototype if it's there.
+ Handle<JSObject> push_and_pop_prototype;
+ Handle<Object> superproto(visible_prototype->GetPrototype());
+ if (superproto->IsJSObject() &&
+ JSObject::cast(*superproto)->map()->is_hidden_prototype()) {
+ push_and_pop_prototype = Handle<JSObject>::cast(superproto);
+ } else {
+ push_and_pop_prototype = visible_prototype;
+ }
+ AddSpecialFunction(push_and_pop_prototype, "pop",
+ Handle<Code>(Builtins::builtin(Builtins::ArrayPop)));
+ AddSpecialFunction(push_and_pop_prototype, "push",
+ Handle<Code>(Builtins::builtin(Builtins::ArrayPush)));
+}
+
+
+Genesis::Genesis(Handle<Object> global_object,
+ v8::Handle<v8::ObjectTemplate> global_template,
+ v8::ExtensionConfiguration* extensions) {
+ // Link this genesis object into the stacked genesis chain. This
+ // must be done before any early exits because the destructor
+ // will always do unlinking.
+ previous_ = current_;
+ current_ = this;
+ result_ = Handle<Context>::null();
+
+ // If V8 isn't running and cannot be initialized, just return.
+ if (!V8::IsRunning() && !V8::Initialize(NULL)) return;
+
+ // Before creating the roots we must save the context and restore it
+ // on all function exits.
+ HandleScope scope;
+ SaveContext context;
+
+ CreateRoots(global_template, global_object);
+
+ if (!InstallNatives()) return;
+
+ MakeFunctionInstancePrototypeWritable();
+ BuildSpecialFunctionTable();
+
+ if (!ConfigureGlobalObjects(global_template)) return;
+
+ if (!InstallExtensions(extensions)) return;
+
+ if (!InstallSpecialObjects()) return;
+
+ result_ = global_context_;
+}
+
+
+// Support for thread preemption.
+
+// Reserve space for statics needing saving and restoring.
+int Bootstrapper::ArchiveSpacePerThread() {
+ return Genesis::ArchiveSpacePerThread();
+}
+
+
+// Archive statics that are thread local.
+char* Bootstrapper::ArchiveState(char* to) {
+ return Genesis::ArchiveState(to);
+}
+
+
+// Restore statics that are thread local.
+char* Bootstrapper::RestoreState(char* from) {
+ return Genesis::RestoreState(from);
+}
+
+
+// Called when the top-level V8 mutex is destroyed.
+void Bootstrapper::FreeThreadResources() {
+ ASSERT(Genesis::current() == NULL);
+}
+
+
+// Reserve space for statics needing saving and restoring.
+int Genesis::ArchiveSpacePerThread() {
+ return sizeof(current_);
+}
+
+
+// Archive statics that are thread local.
+char* Genesis::ArchiveState(char* to) {
+ *reinterpret_cast<Genesis**>(to) = current_;
+ current_ = NULL;
+ return to + sizeof(current_);
+}
+
+
+// Restore statics that are thread local.
+char* Genesis::RestoreState(char* from) {
+ current_ = *reinterpret_cast<Genesis**>(from);
+ return from + sizeof(current_);
+}
+
+} } // namespace v8::internal