blob: e51ef0cd1058ef7a61ed632542eca39c682496a3 [file] [log] [blame]
// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/heap/factory.h"
#include "src/objects/fixed-array.h"
#include "src/objects/shared-function-info.h"
#include "src/objects/visitors.h"
namespace v8 {
namespace internal {
// A SourceCodeCache uses a FixedArray to store pairs of (OneByteString,
// SharedFunctionInfo), mapping names of native extensions code files to
// precompiled functions.
class SourceCodeCache final {
explicit SourceCodeCache(Script::Type type) : type_(type) {}
void Initialize(Isolate* isolate, bool create_heap_objects);
void Iterate(RootVisitor* v);
bool Lookup(Isolate* isolate, Vector<const char> name,
Handle<SharedFunctionInfo>* handle);
void Add(Isolate* isolate, Vector<const char> name,
Handle<SharedFunctionInfo> shared);
Script::Type type_;
FixedArray cache_;
// The Boostrapper is the public interface for creating a JavaScript global
// context.
class Bootstrapper final {
static void InitializeOncePerProcess();
// Requires: Heap::SetUp has been called.
void Initialize(bool create_heap_objects);
void TearDown();
// Creates a JavaScript Global Context with initial object graph.
// The returned value is a global handle casted to V8Environment*.
Handle<Context> CreateEnvironment(
MaybeHandle<JSGlobalProxy> maybe_global_proxy,
v8::Local<v8::ObjectTemplate> global_object_template,
v8::ExtensionConfiguration* extensions, size_t context_snapshot_index,
v8::DeserializeEmbedderFieldsCallback embedder_fields_deserializer,
v8::MicrotaskQueue* microtask_queue);
// Used for testing context deserialization. No code runs in the generated
// context. It only needs to pass heap verification.
Handle<Context> CreateEnvironmentForTesting() {
MaybeHandle<JSGlobalProxy> no_global_proxy;
v8::Local<v8::ObjectTemplate> no_global_object_template;
ExtensionConfiguration no_extensions;
static constexpr int kDefaultContextIndex = 0;
v8::DeserializeEmbedderFieldsCallback no_callback;
v8::MicrotaskQueue* no_microtask_queue = nullptr;
return CreateEnvironment(no_global_proxy, no_global_object_template,
&no_extensions, kDefaultContextIndex, no_callback,
Handle<JSGlobalProxy> NewRemoteContext(
MaybeHandle<JSGlobalProxy> maybe_global_proxy,
v8::Local<v8::ObjectTemplate> global_object_template);
// Detach the environment from its outer global object.
void DetachGlobal(Handle<Context> env);
// Traverses the pointers for memory management.
void Iterate(RootVisitor* v);
// Tells whether bootstrapping is active.
bool IsActive() const { return nesting_ != 0; }
// Support for thread preemption.
static int ArchiveSpacePerThread();
char* ArchiveState(char* to);
char* RestoreState(char* from);
void FreeThreadResources();
// Used for new context creation.
bool InstallExtensions(Handle<Context> native_context,
v8::ExtensionConfiguration* extensions);
SourceCodeCache* extensions_cache() { return &extensions_cache_; }
// Log newly created Map objects if no snapshot was used.
void LogAllMaps();
Isolate* isolate_;
using NestingCounterType = int;
NestingCounterType nesting_;
SourceCodeCache extensions_cache_;
friend class BootstrapperActive;
friend class Isolate;
friend class NativesExternalStringResource;
explicit Bootstrapper(Isolate* isolate);
class BootstrapperActive final {
explicit BootstrapperActive(Bootstrapper* bootstrapper)
: bootstrapper_(bootstrapper) {
~BootstrapperActive() { --bootstrapper_->nesting_; }
Bootstrapper* bootstrapper_;
} // namespace internal
} // namespace v8