57e072298f
Two old id types are replaced by builtin function ids. We can use these in the code generators to emit custom code for the selected functions. Review URL: http://codereview.chromium.org/5767002 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@6013 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
1892 lines
71 KiB
C++
1892 lines
71 KiB
C++
// Copyright 2006-2008 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "v8.h"
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#include "accessors.h"
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#include "api.h"
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#include "bootstrapper.h"
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#include "compiler.h"
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#include "debug.h"
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#include "execution.h"
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#include "global-handles.h"
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#include "macro-assembler.h"
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#include "natives.h"
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#include "objects-visiting.h"
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#include "snapshot.h"
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#include "extensions/externalize-string-extension.h"
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#include "extensions/gc-extension.h"
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namespace v8 {
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namespace internal {
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// A SourceCodeCache uses a FixedArray to store pairs of
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// (AsciiString*, JSFunction*), mapping names of native code files
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// (runtime.js, etc.) to precompiled functions. Instead of mapping
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// names to functions it might make sense to let the JS2C tool
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// generate an index for each native JS file.
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class SourceCodeCache BASE_EMBEDDED {
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public:
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explicit SourceCodeCache(Script::Type type): type_(type), cache_(NULL) { }
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void Initialize(bool create_heap_objects) {
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cache_ = create_heap_objects ? Heap::empty_fixed_array() : NULL;
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}
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void Iterate(ObjectVisitor* v) {
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v->VisitPointer(BitCast<Object**>(&cache_));
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}
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bool Lookup(Vector<const char> name, Handle<SharedFunctionInfo>* handle) {
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for (int i = 0; i < cache_->length(); i+=2) {
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SeqAsciiString* str = SeqAsciiString::cast(cache_->get(i));
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if (str->IsEqualTo(name)) {
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*handle = Handle<SharedFunctionInfo>(
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SharedFunctionInfo::cast(cache_->get(i + 1)));
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return true;
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}
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}
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return false;
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}
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void Add(Vector<const char> name, Handle<SharedFunctionInfo> shared) {
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HandleScope scope;
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int length = cache_->length();
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Handle<FixedArray> new_array =
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Factory::NewFixedArray(length + 2, TENURED);
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cache_->CopyTo(0, *new_array, 0, cache_->length());
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cache_ = *new_array;
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Handle<String> str = Factory::NewStringFromAscii(name, TENURED);
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cache_->set(length, *str);
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cache_->set(length + 1, *shared);
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Script::cast(shared->script())->set_type(Smi::FromInt(type_));
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}
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private:
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Script::Type type_;
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FixedArray* cache_;
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DISALLOW_COPY_AND_ASSIGN(SourceCodeCache);
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};
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static SourceCodeCache extensions_cache(Script::TYPE_EXTENSION);
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// This is for delete, not delete[].
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static List<char*>* delete_these_non_arrays_on_tear_down = NULL;
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// This is for delete[]
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static List<char*>* delete_these_arrays_on_tear_down = NULL;
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NativesExternalStringResource::NativesExternalStringResource(const char* source)
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: data_(source), length_(StrLength(source)) {
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if (delete_these_non_arrays_on_tear_down == NULL) {
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delete_these_non_arrays_on_tear_down = new List<char*>(2);
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}
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// The resources are small objects and we only make a fixed number of
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// them, but let's clean them up on exit for neatness.
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delete_these_non_arrays_on_tear_down->
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Add(reinterpret_cast<char*>(this));
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}
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Handle<String> Bootstrapper::NativesSourceLookup(int index) {
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ASSERT(0 <= index && index < Natives::GetBuiltinsCount());
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if (Heap::natives_source_cache()->get(index)->IsUndefined()) {
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if (!Snapshot::IsEnabled() || FLAG_new_snapshot) {
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// We can use external strings for the natives.
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NativesExternalStringResource* resource =
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new NativesExternalStringResource(
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Natives::GetScriptSource(index).start());
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Handle<String> source_code =
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Factory::NewExternalStringFromAscii(resource);
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Heap::natives_source_cache()->set(index, *source_code);
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} else {
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// Old snapshot code can't cope with external strings at all.
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Handle<String> source_code =
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Factory::NewStringFromAscii(Natives::GetScriptSource(index));
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Heap::natives_source_cache()->set(index, *source_code);
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}
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}
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Handle<Object> cached_source(Heap::natives_source_cache()->get(index));
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return Handle<String>::cast(cached_source);
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}
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void Bootstrapper::Initialize(bool create_heap_objects) {
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extensions_cache.Initialize(create_heap_objects);
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GCExtension::Register();
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ExternalizeStringExtension::Register();
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}
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char* Bootstrapper::AllocateAutoDeletedArray(int bytes) {
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char* memory = new char[bytes];
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if (memory != NULL) {
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if (delete_these_arrays_on_tear_down == NULL) {
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delete_these_arrays_on_tear_down = new List<char*>(2);
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}
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delete_these_arrays_on_tear_down->Add(memory);
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}
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return memory;
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}
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void Bootstrapper::TearDown() {
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if (delete_these_non_arrays_on_tear_down != NULL) {
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int len = delete_these_non_arrays_on_tear_down->length();
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ASSERT(len < 20); // Don't use this mechanism for unbounded allocations.
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for (int i = 0; i < len; i++) {
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delete delete_these_non_arrays_on_tear_down->at(i);
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delete_these_non_arrays_on_tear_down->at(i) = NULL;
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}
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delete delete_these_non_arrays_on_tear_down;
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delete_these_non_arrays_on_tear_down = NULL;
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}
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if (delete_these_arrays_on_tear_down != NULL) {
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int len = delete_these_arrays_on_tear_down->length();
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ASSERT(len < 1000); // Don't use this mechanism for unbounded allocations.
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for (int i = 0; i < len; i++) {
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delete[] delete_these_arrays_on_tear_down->at(i);
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delete_these_arrays_on_tear_down->at(i) = NULL;
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}
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delete delete_these_arrays_on_tear_down;
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delete_these_arrays_on_tear_down = NULL;
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}
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extensions_cache.Initialize(false); // Yes, symmetrical
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}
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class Genesis BASE_EMBEDDED {
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public:
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Genesis(Handle<Object> global_object,
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v8::Handle<v8::ObjectTemplate> global_template,
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v8::ExtensionConfiguration* extensions);
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~Genesis() { }
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Handle<Context> result() { return result_; }
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Genesis* previous() { return previous_; }
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private:
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Handle<Context> global_context_;
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// There may be more than one active genesis object: When GC is
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// triggered during environment creation there may be weak handle
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// processing callbacks which may create new environments.
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Genesis* previous_;
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Handle<Context> global_context() { return global_context_; }
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// Creates some basic objects. Used for creating a context from scratch.
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void CreateRoots();
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// Creates the empty function. Used for creating a context from scratch.
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Handle<JSFunction> CreateEmptyFunction();
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// Creates the global objects using the global and the template passed in
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// through the API. We call this regardless of whether we are building a
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// context from scratch or using a deserialized one from the partial snapshot
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// but in the latter case we don't use the objects it produces directly, as
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// we have to used the deserialized ones that are linked together with the
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// rest of the context snapshot.
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Handle<JSGlobalProxy> CreateNewGlobals(
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v8::Handle<v8::ObjectTemplate> global_template,
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Handle<Object> global_object,
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Handle<GlobalObject>* global_proxy_out);
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// Hooks the given global proxy into the context. If the context was created
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// by deserialization then this will unhook the global proxy that was
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// deserialized, leaving the GC to pick it up.
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void HookUpGlobalProxy(Handle<GlobalObject> inner_global,
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Handle<JSGlobalProxy> global_proxy);
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// Similarly, we want to use the inner global that has been created by the
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// templates passed through the API. The inner global from the snapshot is
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// detached from the other objects in the snapshot.
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void HookUpInnerGlobal(Handle<GlobalObject> inner_global);
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// New context initialization. Used for creating a context from scratch.
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void InitializeGlobal(Handle<GlobalObject> inner_global,
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Handle<JSFunction> empty_function);
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// Installs the contents of the native .js files on the global objects.
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// Used for creating a context from scratch.
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void InstallNativeFunctions();
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bool InstallNatives();
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void InstallBuiltinFunctionIds();
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void InstallJSFunctionResultCaches();
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void InitializeNormalizedMapCaches();
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// Used both for deserialized and from-scratch contexts to add the extensions
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// provided.
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static bool InstallExtensions(Handle<Context> global_context,
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v8::ExtensionConfiguration* extensions);
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static bool InstallExtension(const char* name);
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static bool InstallExtension(v8::RegisteredExtension* current);
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static void InstallSpecialObjects(Handle<Context> global_context);
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bool InstallJSBuiltins(Handle<JSBuiltinsObject> builtins);
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bool ConfigureApiObject(Handle<JSObject> object,
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Handle<ObjectTemplateInfo> object_template);
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bool ConfigureGlobalObjects(v8::Handle<v8::ObjectTemplate> global_template);
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// Migrates all properties from the 'from' object to the 'to'
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// object and overrides the prototype in 'to' with the one from
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// 'from'.
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void TransferObject(Handle<JSObject> from, Handle<JSObject> to);
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void TransferNamedProperties(Handle<JSObject> from, Handle<JSObject> to);
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void TransferIndexedProperties(Handle<JSObject> from, Handle<JSObject> to);
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enum PrototypePropertyMode {
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DONT_ADD_PROTOTYPE,
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ADD_READONLY_PROTOTYPE,
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ADD_WRITEABLE_PROTOTYPE
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};
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Handle<DescriptorArray> ComputeFunctionInstanceDescriptor(
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PrototypePropertyMode prototypeMode);
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void MakeFunctionInstancePrototypeWritable();
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static bool CompileBuiltin(int index);
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static bool CompileNative(Vector<const char> name, Handle<String> source);
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static bool CompileScriptCached(Vector<const char> name,
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Handle<String> source,
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SourceCodeCache* cache,
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v8::Extension* extension,
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Handle<Context> top_context,
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bool use_runtime_context);
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Handle<Context> result_;
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Handle<JSFunction> empty_function_;
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BootstrapperActive active_;
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friend class Bootstrapper;
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};
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void Bootstrapper::Iterate(ObjectVisitor* v) {
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extensions_cache.Iterate(v);
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v->Synchronize("Extensions");
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}
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Handle<Context> Bootstrapper::CreateEnvironment(
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Handle<Object> global_object,
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v8::Handle<v8::ObjectTemplate> global_template,
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v8::ExtensionConfiguration* extensions) {
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HandleScope scope;
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Handle<Context> env;
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Genesis genesis(global_object, global_template, extensions);
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env = genesis.result();
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if (!env.is_null()) {
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if (InstallExtensions(env, extensions)) {
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return env;
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}
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}
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return Handle<Context>();
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}
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static void SetObjectPrototype(Handle<JSObject> object, Handle<Object> proto) {
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// object.__proto__ = proto;
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Handle<Map> old_to_map = Handle<Map>(object->map());
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Handle<Map> new_to_map = Factory::CopyMapDropTransitions(old_to_map);
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new_to_map->set_prototype(*proto);
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object->set_map(*new_to_map);
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}
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void Bootstrapper::DetachGlobal(Handle<Context> env) {
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JSGlobalProxy::cast(env->global_proxy())->set_context(*Factory::null_value());
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SetObjectPrototype(Handle<JSObject>(env->global_proxy()),
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Factory::null_value());
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env->set_global_proxy(env->global());
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env->global()->set_global_receiver(env->global());
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}
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void Bootstrapper::ReattachGlobal(Handle<Context> env,
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Handle<Object> global_object) {
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ASSERT(global_object->IsJSGlobalProxy());
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Handle<JSGlobalProxy> global = Handle<JSGlobalProxy>::cast(global_object);
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env->global()->set_global_receiver(*global);
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env->set_global_proxy(*global);
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SetObjectPrototype(global, Handle<JSObject>(env->global()));
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global->set_context(*env);
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}
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static Handle<JSFunction> InstallFunction(Handle<JSObject> target,
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const char* name,
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InstanceType type,
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int instance_size,
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Handle<JSObject> prototype,
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Builtins::Name call,
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bool is_ecma_native) {
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Handle<String> symbol = Factory::LookupAsciiSymbol(name);
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Handle<Code> call_code = Handle<Code>(Builtins::builtin(call));
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Handle<JSFunction> function = prototype.is_null() ?
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Factory::NewFunctionWithoutPrototype(symbol, call_code) :
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Factory::NewFunctionWithPrototype(symbol,
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type,
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instance_size,
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prototype,
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call_code,
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is_ecma_native);
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SetProperty(target, symbol, function, DONT_ENUM);
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if (is_ecma_native) {
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function->shared()->set_instance_class_name(*symbol);
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}
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return function;
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}
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Handle<DescriptorArray> Genesis::ComputeFunctionInstanceDescriptor(
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PrototypePropertyMode prototypeMode) {
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Handle<DescriptorArray> result = Factory::empty_descriptor_array();
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if (prototypeMode != DONT_ADD_PROTOTYPE) {
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PropertyAttributes attributes = static_cast<PropertyAttributes>(
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DONT_ENUM |
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DONT_DELETE |
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(prototypeMode == ADD_READONLY_PROTOTYPE ? READ_ONLY : 0));
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result =
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Factory::CopyAppendProxyDescriptor(
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result,
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Factory::prototype_symbol(),
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Factory::NewProxy(&Accessors::FunctionPrototype),
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attributes);
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}
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PropertyAttributes attributes =
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static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
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// Add length.
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result =
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Factory::CopyAppendProxyDescriptor(
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result,
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Factory::length_symbol(),
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Factory::NewProxy(&Accessors::FunctionLength),
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attributes);
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// Add name.
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result =
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Factory::CopyAppendProxyDescriptor(
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result,
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Factory::name_symbol(),
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Factory::NewProxy(&Accessors::FunctionName),
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attributes);
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// Add arguments.
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result =
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Factory::CopyAppendProxyDescriptor(
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result,
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Factory::arguments_symbol(),
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Factory::NewProxy(&Accessors::FunctionArguments),
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attributes);
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// Add caller.
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result =
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Factory::CopyAppendProxyDescriptor(
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result,
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Factory::caller_symbol(),
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Factory::NewProxy(&Accessors::FunctionCaller),
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attributes);
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return result;
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}
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Handle<JSFunction> Genesis::CreateEmptyFunction() {
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// Allocate the map for function instances.
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Handle<Map> fm = Factory::NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
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global_context()->set_function_instance_map(*fm);
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// Please note that the prototype property for function instances must be
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// writable.
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Handle<DescriptorArray> function_map_descriptors =
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ComputeFunctionInstanceDescriptor(ADD_WRITEABLE_PROTOTYPE);
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fm->set_instance_descriptors(*function_map_descriptors);
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fm->set_function_with_prototype(true);
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// Functions with this map will not have a 'prototype' property, and
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// can not be used as constructors.
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Handle<Map> function_without_prototype_map =
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Factory::NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
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global_context()->set_function_without_prototype_map(
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*function_without_prototype_map);
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Handle<DescriptorArray> function_without_prototype_map_descriptors =
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ComputeFunctionInstanceDescriptor(DONT_ADD_PROTOTYPE);
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function_without_prototype_map->set_instance_descriptors(
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*function_without_prototype_map_descriptors);
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function_without_prototype_map->set_function_with_prototype(false);
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// Allocate the function map first and then patch the prototype later
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fm = Factory::NewMap(JS_FUNCTION_TYPE, JSFunction::kSize);
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global_context()->set_function_map(*fm);
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function_map_descriptors =
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ComputeFunctionInstanceDescriptor(ADD_READONLY_PROTOTYPE);
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fm->set_instance_descriptors(*function_map_descriptors);
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fm->set_function_with_prototype(true);
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Handle<String> object_name = Handle<String>(Heap::Object_symbol());
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{ // --- O b j e c t ---
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Handle<JSFunction> object_fun =
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Factory::NewFunction(object_name, Factory::null_value());
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Handle<Map> object_function_map =
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Factory::NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
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object_fun->set_initial_map(*object_function_map);
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object_function_map->set_constructor(*object_fun);
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global_context()->set_object_function(*object_fun);
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// Allocate a new prototype for the object function.
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Handle<JSObject> prototype = Factory::NewJSObject(Top::object_function(),
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TENURED);
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global_context()->set_initial_object_prototype(*prototype);
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SetPrototype(object_fun, prototype);
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object_function_map->
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set_instance_descriptors(Heap::empty_descriptor_array());
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}
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// Allocate the empty function as the prototype for function ECMAScript
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// 262 15.3.4.
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Handle<String> symbol = Factory::LookupAsciiSymbol("Empty");
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Handle<JSFunction> empty_function =
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Factory::NewFunctionWithoutPrototype(symbol);
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// --- E m p t y ---
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Handle<Code> code =
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Handle<Code>(Builtins::builtin(Builtins::EmptyFunction));
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empty_function->set_code(*code);
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empty_function->shared()->set_code(*code);
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Handle<String> source = Factory::NewStringFromAscii(CStrVector("() {}"));
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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);
|
|
global_context()->function_without_prototype_map()->
|
|
set_prototype(*empty_function);
|
|
|
|
// Allocate the function map first and then patch the prototype later
|
|
Handle<Map> empty_fm = Factory::CopyMapDropDescriptors(
|
|
function_without_prototype_map);
|
|
empty_fm->set_instance_descriptors(
|
|
*function_without_prototype_map_descriptors);
|
|
empty_fm->set_prototype(global_context()->object_function()->prototype());
|
|
empty_function->set_map(*empty_fm);
|
|
return empty_function;
|
|
}
|
|
|
|
|
|
static void AddToWeakGlobalContextList(Context* context) {
|
|
ASSERT(context->IsGlobalContext());
|
|
#ifdef DEBUG
|
|
{ // NOLINT
|
|
ASSERT(context->get(Context::NEXT_CONTEXT_LINK)->IsUndefined());
|
|
// Check that context is not in the list yet.
|
|
for (Object* current = Heap::global_contexts_list();
|
|
!current->IsUndefined();
|
|
current = Context::cast(current)->get(Context::NEXT_CONTEXT_LINK)) {
|
|
ASSERT(current != context);
|
|
}
|
|
}
|
|
#endif
|
|
context->set(Context::NEXT_CONTEXT_LINK, Heap::global_contexts_list());
|
|
Heap::set_global_contexts_list(context);
|
|
}
|
|
|
|
|
|
void Genesis::CreateRoots() {
|
|
// 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()));
|
|
AddToWeakGlobalContextList(*global_context_);
|
|
Top::set_context(*global_context());
|
|
|
|
// Allocate the message listeners object.
|
|
{
|
|
v8::NeanderArray listeners;
|
|
global_context()->set_message_listeners(*listeners.value());
|
|
}
|
|
}
|
|
|
|
|
|
Handle<JSGlobalProxy> Genesis::CreateNewGlobals(
|
|
v8::Handle<v8::ObjectTemplate> global_template,
|
|
Handle<Object> global_object,
|
|
Handle<GlobalObject>* inner_global_out) {
|
|
// The argument global_template aka data is an ObjectTemplateInfo.
|
|
// It has a constructor pointer that points at global_constructor which is a
|
|
// FunctionTemplateInfo.
|
|
// The global_constructor is used to create or reinitialize the global_proxy.
|
|
// The global_constructor also has a prototype_template pointer that points at
|
|
// js_global_template which is an ObjectTemplateInfo.
|
|
// That in turn has a constructor pointer that points at
|
|
// js_global_constructor which is a FunctionTemplateInfo.
|
|
// js_global_constructor is used to make js_global_function
|
|
// js_global_function is used to make the new inner_global.
|
|
//
|
|
// --- G l o b a l ---
|
|
// Step 1: Create a fresh inner JSGlobalObject.
|
|
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();
|
|
Handle<GlobalObject> inner_global =
|
|
Factory::NewGlobalObject(js_global_function);
|
|
if (inner_global_out != NULL) {
|
|
*inner_global_out = inner_global;
|
|
}
|
|
|
|
// Step 2: create or re-initialize the global proxy object.
|
|
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
|
|
// Return the global proxy.
|
|
|
|
if (global_object.location() != NULL) {
|
|
ASSERT(global_object->IsJSGlobalProxy());
|
|
return ReinitializeJSGlobalProxy(
|
|
global_proxy_function,
|
|
Handle<JSGlobalProxy>::cast(global_object));
|
|
} else {
|
|
return Handle<JSGlobalProxy>::cast(
|
|
Factory::NewJSObject(global_proxy_function, TENURED));
|
|
}
|
|
}
|
|
|
|
|
|
void Genesis::HookUpGlobalProxy(Handle<GlobalObject> inner_global,
|
|
Handle<JSGlobalProxy> global_proxy) {
|
|
// Set the global context for the global object.
|
|
inner_global->set_global_context(*global_context());
|
|
inner_global->set_global_receiver(*global_proxy);
|
|
global_proxy->set_context(*global_context());
|
|
global_context()->set_global_proxy(*global_proxy);
|
|
}
|
|
|
|
|
|
void Genesis::HookUpInnerGlobal(Handle<GlobalObject> inner_global) {
|
|
Handle<GlobalObject> inner_global_from_snapshot(
|
|
GlobalObject::cast(global_context_->extension()));
|
|
Handle<JSBuiltinsObject> builtins_global(global_context_->builtins());
|
|
global_context_->set_extension(*inner_global);
|
|
global_context_->set_global(*inner_global);
|
|
global_context_->set_security_token(*inner_global);
|
|
static const PropertyAttributes attributes =
|
|
static_cast<PropertyAttributes>(READ_ONLY | DONT_DELETE);
|
|
ForceSetProperty(builtins_global,
|
|
Factory::LookupAsciiSymbol("global"),
|
|
inner_global,
|
|
attributes);
|
|
// Setup the reference from the global object to the builtins object.
|
|
JSGlobalObject::cast(*inner_global)->set_builtins(*builtins_global);
|
|
TransferNamedProperties(inner_global_from_snapshot, inner_global);
|
|
TransferIndexedProperties(inner_global_from_snapshot, inner_global);
|
|
}
|
|
|
|
|
|
// This is only called if we are not using snapshots. The equivalent
|
|
// work in the snapshot case is done in HookUpInnerGlobal.
|
|
void Genesis::InitializeGlobal(Handle<GlobalObject> inner_global,
|
|
Handle<JSFunction> empty_function) {
|
|
// --- 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(*inner_global);
|
|
global_context()->set_global(*inner_global);
|
|
// 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.
|
|
global_context()->set_security_token(*inner_global);
|
|
|
|
Handle<String> object_name = Handle<String>(Heap::Object_symbol());
|
|
SetProperty(inner_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);
|
|
string_fun->shared()->set_construct_stub(
|
|
Builtins::builtin(Builtins::StringConstructCode));
|
|
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);
|
|
|
|
ASSERT(regexp_fun->has_initial_map());
|
|
Handle<Map> initial_map(regexp_fun->initial_map());
|
|
|
|
ASSERT_EQ(0, initial_map->inobject_properties());
|
|
|
|
Handle<DescriptorArray> descriptors = Factory::NewDescriptorArray(5);
|
|
PropertyAttributes final =
|
|
static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE | READ_ONLY);
|
|
int enum_index = 0;
|
|
{
|
|
// ECMA-262, section 15.10.7.1.
|
|
FieldDescriptor field(Heap::source_symbol(),
|
|
JSRegExp::kSourceFieldIndex,
|
|
final,
|
|
enum_index++);
|
|
descriptors->Set(0, &field);
|
|
}
|
|
{
|
|
// ECMA-262, section 15.10.7.2.
|
|
FieldDescriptor field(Heap::global_symbol(),
|
|
JSRegExp::kGlobalFieldIndex,
|
|
final,
|
|
enum_index++);
|
|
descriptors->Set(1, &field);
|
|
}
|
|
{
|
|
// ECMA-262, section 15.10.7.3.
|
|
FieldDescriptor field(Heap::ignore_case_symbol(),
|
|
JSRegExp::kIgnoreCaseFieldIndex,
|
|
final,
|
|
enum_index++);
|
|
descriptors->Set(2, &field);
|
|
}
|
|
{
|
|
// ECMA-262, section 15.10.7.4.
|
|
FieldDescriptor field(Heap::multiline_symbol(),
|
|
JSRegExp::kMultilineFieldIndex,
|
|
final,
|
|
enum_index++);
|
|
descriptors->Set(3, &field);
|
|
}
|
|
{
|
|
// ECMA-262, section 15.10.7.5.
|
|
PropertyAttributes writable =
|
|
static_cast<PropertyAttributes>(DONT_ENUM | DONT_DELETE);
|
|
FieldDescriptor field(Heap::last_index_symbol(),
|
|
JSRegExp::kLastIndexFieldIndex,
|
|
writable,
|
|
enum_index++);
|
|
descriptors->Set(4, &field);
|
|
}
|
|
descriptors->SetNextEnumerationIndex(enum_index);
|
|
descriptors->Sort();
|
|
|
|
initial_map->set_inobject_properties(5);
|
|
initial_map->set_pre_allocated_property_fields(5);
|
|
initial_map->set_unused_property_fields(0);
|
|
initial_map->set_instance_size(
|
|
initial_map->instance_size() + 5 * kPointerSize);
|
|
initial_map->set_instance_descriptors(*descriptors);
|
|
initial_map->set_visitor_id(StaticVisitorBase::GetVisitorId(*initial_map));
|
|
}
|
|
|
|
{ // -- 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.IsProperty() && (lookup.type() == FIELD));
|
|
ASSERT(lookup.GetFieldIndex() == Heap::arguments_callee_index);
|
|
|
|
result->LocalLookup(Heap::length_symbol(), &lookup);
|
|
ASSERT(lookup.IsProperty() && (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();
|
|
}
|
|
|
|
// 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,
|
|
NULL,
|
|
NULL,
|
|
Handle<Context>(Top::context()),
|
|
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,
|
|
Handle<Context> top_context,
|
|
bool use_runtime_context) {
|
|
HandleScope scope;
|
|
Handle<SharedFunctionInfo> function_info;
|
|
|
|
// If we can't find the function in the cache, we compile a new
|
|
// function and insert it into the cache.
|
|
if (cache == NULL || !cache->Lookup(name, &function_info)) {
|
|
ASSERT(source->IsAsciiRepresentation());
|
|
Handle<String> script_name = Factory::NewStringFromUtf8(name);
|
|
function_info = Compiler::Compile(
|
|
source,
|
|
script_name,
|
|
0,
|
|
0,
|
|
extension,
|
|
NULL,
|
|
Handle<String>::null(),
|
|
use_runtime_context ? NATIVES_CODE : NOT_NATIVES_CODE);
|
|
if (function_info.is_null()) return false;
|
|
if (cache != NULL) cache->Add(name, function_info);
|
|
}
|
|
|
|
// 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
|
|
? Handle<Context>(top_context->runtime_context())
|
|
: top_context);
|
|
Handle<JSFunction> fun =
|
|
Factory::NewFunctionFromSharedFunctionInfo(function_info, context);
|
|
|
|
// Call function using 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 true;
|
|
}
|
|
|
|
|
|
#define INSTALL_NATIVE(Type, name, var) \
|
|
Handle<String> var##_name = Factory::LookupAsciiSymbol(name); \
|
|
global_context()->set_##var(Type::cast( \
|
|
global_context()->builtins()->GetPropertyNoExceptionThrown(*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, "GlobalEval", global_eval_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);
|
|
Handle<String> global_symbol = Factory::LookupAsciiSymbol("global");
|
|
SetProperty(builtins,
|
|
global_symbol,
|
|
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_script =
|
|
Factory::NewProxy(&Accessors::ScriptEvalFromScript);
|
|
script_descriptors =
|
|
Factory::CopyAppendProxyDescriptor(
|
|
script_descriptors,
|
|
Factory::LookupAsciiSymbol("eval_from_script"),
|
|
proxy_eval_from_script,
|
|
common_attributes);
|
|
Handle<Proxy> proxy_eval_from_script_position =
|
|
Factory::NewProxy(&Accessors::ScriptEvalFromScriptPosition);
|
|
script_descriptors =
|
|
Factory::CopyAppendProxyDescriptor(
|
|
script_descriptors,
|
|
Factory::LookupAsciiSymbol("eval_from_script_position"),
|
|
proxy_eval_from_script_position,
|
|
common_attributes);
|
|
Handle<Proxy> proxy_eval_from_function_name =
|
|
Factory::NewProxy(&Accessors::ScriptEvalFromFunctionName);
|
|
script_descriptors =
|
|
Factory::CopyAppendProxyDescriptor(
|
|
script_descriptors,
|
|
Factory::LookupAsciiSymbol("eval_from_function_name"),
|
|
proxy_eval_from_function_name,
|
|
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));
|
|
Heap::public_set_empty_script(*script);
|
|
}
|
|
{
|
|
// Builtin function for OpaqueReference -- a JSValue-based object,
|
|
// that keeps its field isolated from JavaScript code. It may store
|
|
// objects, that JavaScript code may not access.
|
|
Handle<JSFunction> opaque_reference_fun =
|
|
InstallFunction(builtins, "OpaqueReference", JS_VALUE_TYPE,
|
|
JSValue::kSize, Top::initial_object_prototype(),
|
|
Builtins::Illegal, false);
|
|
Handle<JSObject> prototype =
|
|
Factory::NewJSObject(Top::object_function(), TENURED);
|
|
SetPrototype(opaque_reference_fun, prototype);
|
|
global_context()->set_opaque_reference_function(*opaque_reference_fun);
|
|
}
|
|
|
|
if (FLAG_disable_native_files) {
|
|
PrintF("Warning: Running without installed natives!\n");
|
|
return true;
|
|
}
|
|
|
|
// Install natives.
|
|
for (int i = Natives::GetDebuggerCount();
|
|
i < Natives::GetBuiltinsCount();
|
|
i++) {
|
|
Vector<const char> name = Natives::GetScriptName(i);
|
|
if (!CompileBuiltin(i)) return false;
|
|
// TODO(ager): We really only need to install the JS builtin
|
|
// functions on the builtins object after compiling and running
|
|
// runtime.js.
|
|
if (!InstallJSBuiltins(builtins)) return false;
|
|
}
|
|
|
|
InstallNativeFunctions();
|
|
|
|
// Store the map for the string prototype after the natives has been compiled
|
|
// and the String function has been setup.
|
|
Handle<JSFunction> string_function(global_context()->string_function());
|
|
ASSERT(JSObject::cast(
|
|
string_function->initial_map()->prototype())->HasFastProperties());
|
|
global_context()->set_string_function_prototype_map(
|
|
HeapObject::cast(string_function->initial_map()->prototype())->map());
|
|
|
|
InstallBuiltinFunctionIds();
|
|
|
|
// 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,
|
|
Handle<JSObject>::null(),
|
|
Builtins::FunctionCall,
|
|
false);
|
|
Handle<JSFunction> apply =
|
|
InstallFunction(proto, "apply", JS_OBJECT_TYPE, JSObject::kHeaderSize,
|
|
Handle<JSObject>::null(),
|
|
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);
|
|
}
|
|
|
|
// Create a constructor for RegExp results (a variant of Array that
|
|
// predefines the two properties index and match).
|
|
{
|
|
// RegExpResult initial map.
|
|
|
|
// Find global.Array.prototype to inherit from.
|
|
Handle<JSFunction> array_constructor(global_context()->array_function());
|
|
Handle<JSObject> array_prototype(
|
|
JSObject::cast(array_constructor->instance_prototype()));
|
|
|
|
// Add initial map.
|
|
Handle<Map> initial_map =
|
|
Factory::NewMap(JS_ARRAY_TYPE, JSRegExpResult::kSize);
|
|
initial_map->set_constructor(*array_constructor);
|
|
|
|
// Set prototype on map.
|
|
initial_map->set_non_instance_prototype(false);
|
|
initial_map->set_prototype(*array_prototype);
|
|
|
|
// Update map with length accessor from Array and add "index" and "input".
|
|
Handle<Map> array_map(global_context()->js_array_map());
|
|
Handle<DescriptorArray> array_descriptors(
|
|
array_map->instance_descriptors());
|
|
ASSERT_EQ(1, array_descriptors->number_of_descriptors());
|
|
|
|
Handle<DescriptorArray> reresult_descriptors =
|
|
Factory::NewDescriptorArray(3);
|
|
|
|
reresult_descriptors->CopyFrom(0, *array_descriptors, 0);
|
|
|
|
int enum_index = 0;
|
|
{
|
|
FieldDescriptor index_field(Heap::index_symbol(),
|
|
JSRegExpResult::kIndexIndex,
|
|
NONE,
|
|
enum_index++);
|
|
reresult_descriptors->Set(1, &index_field);
|
|
}
|
|
|
|
{
|
|
FieldDescriptor input_field(Heap::input_symbol(),
|
|
JSRegExpResult::kInputIndex,
|
|
NONE,
|
|
enum_index++);
|
|
reresult_descriptors->Set(2, &input_field);
|
|
}
|
|
reresult_descriptors->Sort();
|
|
|
|
initial_map->set_inobject_properties(2);
|
|
initial_map->set_pre_allocated_property_fields(2);
|
|
initial_map->set_unused_property_fields(0);
|
|
initial_map->set_instance_descriptors(*reresult_descriptors);
|
|
|
|
global_context()->set_regexp_result_map(*initial_map);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
builtins->Verify();
|
|
#endif
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
static Handle<JSObject> ResolveBuiltinIdHolder(
|
|
Handle<Context> global_context,
|
|
const char* holder_expr) {
|
|
Handle<GlobalObject> global(global_context->global());
|
|
const char* period_pos = strchr(holder_expr, '.');
|
|
if (period_pos == NULL) {
|
|
return Handle<JSObject>::cast(
|
|
GetProperty(global, Factory::LookupAsciiSymbol(holder_expr)));
|
|
}
|
|
ASSERT_EQ(".prototype", period_pos);
|
|
Vector<const char> property(holder_expr,
|
|
static_cast<int>(period_pos - holder_expr));
|
|
Handle<JSFunction> function = Handle<JSFunction>::cast(
|
|
GetProperty(global, Factory::LookupSymbol(property)));
|
|
return Handle<JSObject>(JSObject::cast(function->prototype()));
|
|
}
|
|
|
|
|
|
static void InstallBuiltinFunctionId(Handle<JSObject> holder,
|
|
const char* function_name,
|
|
BuiltinFunctionId id) {
|
|
Handle<String> name = Factory::LookupAsciiSymbol(function_name);
|
|
Object* function_object = holder->GetProperty(*name)->ToObjectUnchecked();
|
|
Handle<JSFunction> function(JSFunction::cast(function_object));
|
|
function->shared()->set_function_data(Smi::FromInt(id));
|
|
}
|
|
|
|
|
|
void Genesis::InstallBuiltinFunctionIds() {
|
|
HandleScope scope;
|
|
#define INSTALL_BUILTIN_ID(holder_expr, fun_name, name) \
|
|
{ \
|
|
Handle<JSObject> holder = ResolveBuiltinIdHolder( \
|
|
global_context(), #holder_expr); \
|
|
BuiltinFunctionId id = k##name; \
|
|
InstallBuiltinFunctionId(holder, #fun_name, id); \
|
|
}
|
|
FUNCTIONS_WITH_ID_LIST(INSTALL_BUILTIN_ID)
|
|
#undef INSTALL_BUILTIN_ID
|
|
}
|
|
|
|
|
|
// Do not forget to update macros.py with named constant
|
|
// of cache id.
|
|
#define JSFUNCTION_RESULT_CACHE_LIST(F) \
|
|
F(16, global_context()->regexp_function())
|
|
|
|
|
|
static FixedArray* CreateCache(int size, JSFunction* factory) {
|
|
// Caches are supposed to live for a long time, allocate in old space.
|
|
int array_size = JSFunctionResultCache::kEntriesIndex + 2 * size;
|
|
// Cannot use cast as object is not fully initialized yet.
|
|
JSFunctionResultCache* cache = reinterpret_cast<JSFunctionResultCache*>(
|
|
*Factory::NewFixedArrayWithHoles(array_size, TENURED));
|
|
cache->set(JSFunctionResultCache::kFactoryIndex, factory);
|
|
cache->MakeZeroSize();
|
|
return cache;
|
|
}
|
|
|
|
|
|
void Genesis::InstallJSFunctionResultCaches() {
|
|
const int kNumberOfCaches = 0 +
|
|
#define F(size, func) + 1
|
|
JSFUNCTION_RESULT_CACHE_LIST(F)
|
|
#undef F
|
|
;
|
|
|
|
Handle<FixedArray> caches = Factory::NewFixedArray(kNumberOfCaches, TENURED);
|
|
|
|
int index = 0;
|
|
|
|
#define F(size, func) do { \
|
|
FixedArray* cache = CreateCache((size), (func)); \
|
|
caches->set(index++, cache); \
|
|
} while (false)
|
|
|
|
JSFUNCTION_RESULT_CACHE_LIST(F);
|
|
|
|
#undef F
|
|
|
|
global_context()->set_jsfunction_result_caches(*caches);
|
|
}
|
|
|
|
|
|
void Genesis::InitializeNormalizedMapCaches() {
|
|
Handle<FixedArray> array(
|
|
Factory::NewFixedArray(NormalizedMapCache::kEntries, TENURED));
|
|
global_context()->set_normalized_map_cache(NormalizedMapCache::cast(*array));
|
|
}
|
|
|
|
|
|
int BootstrapperActive::nesting_ = 0;
|
|
|
|
|
|
bool Bootstrapper::InstallExtensions(Handle<Context> global_context,
|
|
v8::ExtensionConfiguration* extensions) {
|
|
BootstrapperActive active;
|
|
SaveContext saved_context;
|
|
Top::set_context(*global_context);
|
|
if (!Genesis::InstallExtensions(global_context, extensions)) return false;
|
|
Genesis::InstallSpecialObjects(global_context);
|
|
return true;
|
|
}
|
|
|
|
|
|
void Genesis::InstallSpecialObjects(Handle<Context> global_context) {
|
|
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;
|
|
// 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
|
|
}
|
|
|
|
|
|
bool Genesis::InstallExtensions(Handle<Context> global_context,
|
|
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 (FLAG_expose_externalize_string) InstallExtension("v8/externalize");
|
|
|
|
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,
|
|
Handle<Context>(Top::context()),
|
|
false);
|
|
ASSERT(Top::has_pending_exception() != result);
|
|
if (!result) {
|
|
Top::clear_pending_exception();
|
|
}
|
|
current->set_state(v8::INSTALLED);
|
|
return result;
|
|
}
|
|
|
|
|
|
bool Genesis::InstallJSBuiltins(Handle<JSBuiltinsObject> builtins) {
|
|
HandleScope scope;
|
|
for (int i = 0; i < Builtins::NumberOfJavaScriptBuiltins(); i++) {
|
|
Builtins::JavaScript id = static_cast<Builtins::JavaScript>(i);
|
|
Handle<String> name = Factory::LookupAsciiSymbol(Builtins::GetName(id));
|
|
Object* function_object = builtins->GetPropertyNoExceptionThrown(*name);
|
|
Handle<JSFunction> function
|
|
= Handle<JSFunction>(JSFunction::cast(function_object));
|
|
builtins->set_javascript_builtin(id, *function);
|
|
Handle<SharedFunctionInfo> shared
|
|
= Handle<SharedFunctionInfo>(function->shared());
|
|
if (!EnsureCompiled(shared, CLEAR_EXCEPTION)) return false;
|
|
// Set the code object on the function object.
|
|
function->ReplaceCode(function->shared()->code());
|
|
builtins->set_javascript_builtin_code(id, shared->code());
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
bool Genesis::ConfigureGlobalObjects(
|
|
v8::Handle<v8::ObjectTemplate> global_proxy_template) {
|
|
Handle<JSObject> global_proxy(
|
|
JSObject::cast(global_context()->global_proxy()));
|
|
Handle<JSObject> inner_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(inner_global, inner_data)) return false;
|
|
}
|
|
}
|
|
|
|
SetObjectPrototype(global_proxy, inner_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.IsProperty()) continue;
|
|
HandleScope inner;
|
|
ASSERT(!to->HasFastProperties());
|
|
// Add to dictionary.
|
|
Handle<String> key = Handle<String>(descs->GetKey(i));
|
|
Handle<Object> callbacks(descs->GetCallbacksObject(i));
|
|
PropertyDetails d =
|
|
PropertyDetails(details.attributes(), CALLBACKS, details.index());
|
|
SetNormalizedProperty(to, key, callbacks, d);
|
|
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.IsProperty()) 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(ADD_WRITEABLE_PROTOTYPE);
|
|
Handle<Map> fm = Factory::CopyMapDropDescriptors(Top::function_map());
|
|
fm->set_instance_descriptors(*function_map_descriptors);
|
|
fm->set_function_with_prototype(true);
|
|
Top::context()->global_context()->set_function_map(*fm);
|
|
}
|
|
|
|
|
|
Genesis::Genesis(Handle<Object> global_object,
|
|
v8::Handle<v8::ObjectTemplate> global_template,
|
|
v8::ExtensionConfiguration* extensions) {
|
|
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 saved_context;
|
|
|
|
Handle<Context> new_context = Snapshot::NewContextFromSnapshot();
|
|
if (!new_context.is_null()) {
|
|
global_context_ =
|
|
Handle<Context>::cast(GlobalHandles::Create(*new_context));
|
|
AddToWeakGlobalContextList(*global_context_);
|
|
Top::set_context(*global_context_);
|
|
i::Counters::contexts_created_by_snapshot.Increment();
|
|
result_ = global_context_;
|
|
JSFunction* empty_function =
|
|
JSFunction::cast(result_->function_map()->prototype());
|
|
empty_function_ = Handle<JSFunction>(empty_function);
|
|
Handle<GlobalObject> inner_global;
|
|
Handle<JSGlobalProxy> global_proxy =
|
|
CreateNewGlobals(global_template,
|
|
global_object,
|
|
&inner_global);
|
|
|
|
HookUpGlobalProxy(inner_global, global_proxy);
|
|
HookUpInnerGlobal(inner_global);
|
|
|
|
if (!ConfigureGlobalObjects(global_template)) return;
|
|
} else {
|
|
// We get here if there was no context snapshot.
|
|
CreateRoots();
|
|
Handle<JSFunction> empty_function = CreateEmptyFunction();
|
|
Handle<GlobalObject> inner_global;
|
|
Handle<JSGlobalProxy> global_proxy =
|
|
CreateNewGlobals(global_template, global_object, &inner_global);
|
|
HookUpGlobalProxy(inner_global, global_proxy);
|
|
InitializeGlobal(inner_global, empty_function);
|
|
InstallJSFunctionResultCaches();
|
|
InitializeNormalizedMapCaches();
|
|
if (!InstallNatives()) return;
|
|
|
|
MakeFunctionInstancePrototypeWritable();
|
|
|
|
if (!ConfigureGlobalObjects(global_template)) return;
|
|
i::Counters::contexts_created_from_scratch.Increment();
|
|
}
|
|
|
|
result_ = global_context_;
|
|
}
|
|
|
|
|
|
// Support for thread preemption.
|
|
|
|
// Reserve space for statics needing saving and restoring.
|
|
int Bootstrapper::ArchiveSpacePerThread() {
|
|
return BootstrapperActive::ArchiveSpacePerThread();
|
|
}
|
|
|
|
|
|
// Archive statics that are thread local.
|
|
char* Bootstrapper::ArchiveState(char* to) {
|
|
return BootstrapperActive::ArchiveState(to);
|
|
}
|
|
|
|
|
|
// Restore statics that are thread local.
|
|
char* Bootstrapper::RestoreState(char* from) {
|
|
return BootstrapperActive::RestoreState(from);
|
|
}
|
|
|
|
|
|
// Called when the top-level V8 mutex is destroyed.
|
|
void Bootstrapper::FreeThreadResources() {
|
|
ASSERT(!BootstrapperActive::IsActive());
|
|
}
|
|
|
|
|
|
// Reserve space for statics needing saving and restoring.
|
|
int BootstrapperActive::ArchiveSpacePerThread() {
|
|
return sizeof(nesting_);
|
|
}
|
|
|
|
|
|
// Archive statics that are thread local.
|
|
char* BootstrapperActive::ArchiveState(char* to) {
|
|
*reinterpret_cast<int*>(to) = nesting_;
|
|
nesting_ = 0;
|
|
return to + sizeof(nesting_);
|
|
}
|
|
|
|
|
|
// Restore statics that are thread local.
|
|
char* BootstrapperActive::RestoreState(char* from) {
|
|
nesting_ = *reinterpret_cast<int*>(from);
|
|
return from + sizeof(nesting_);
|
|
}
|
|
|
|
} } // namespace v8::internal
|