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// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef V8_OBJECTS_SOURCE_TEXT_MODULE_H_
#define V8_OBJECTS_SOURCE_TEXT_MODULE_H_
#include "src/objects/module.h"
// Has to be the last include (doesn't have include guards):
#include "src/objects/object-macros.h"
namespace v8 {
namespace internal {
class UnorderedModuleSet;
// The runtime representation of an ECMAScript Source Text Module Record.
// https://tc39.github.io/ecma262/#sec-source-text-module-records
class SourceTextModule
: public TorqueGeneratedSourceTextModule<SourceTextModule, Module> {
public:
NEVER_READ_ONLY_SPACE
DECL_VERIFIER(SourceTextModule)
DECL_PRINTER(SourceTextModule)
// The shared function info in case {status} is not kEvaluating, kEvaluated or
// kErrored.
SharedFunctionInfo GetSharedFunctionInfo() const;
// Get the SourceTextModuleInfo associated with the code.
inline SourceTextModuleInfo info() const;
Cell GetCell(int cell_index);
static Handle<Object> LoadVariable(Isolate* isolate,
Handle<SourceTextModule> module,
int cell_index);
static void StoreVariable(Handle<SourceTextModule> module, int cell_index,
Handle<Object> value);
static int ImportIndex(int cell_index);
static int ExportIndex(int cell_index);
// Get the namespace object for [module_request] of [module]. If it doesn't
// exist yet, it is created.
static Handle<JSModuleNamespace> GetModuleNamespace(
Isolate* isolate, Handle<SourceTextModule> module, int module_request);
using BodyDescriptor =
SubclassBodyDescriptor<Module::BodyDescriptor,
FixedBodyDescriptor<kCodeOffset, kSize, kSize>>;
private:
friend class Factory;
friend class Module;
// TODO(neis): Don't store those in the module object?
DECL_INT_ACCESSORS(dfs_index)
DECL_INT_ACCESSORS(dfs_ancestor_index)
// Helpers for Instantiate and Evaluate.
static void CreateExport(Isolate* isolate, Handle<SourceTextModule> module,
int cell_index, Handle<FixedArray> names);
static void CreateIndirectExport(Isolate* isolate,
Handle<SourceTextModule> module,
Handle<String> name,
Handle<SourceTextModuleInfoEntry> entry);
static V8_WARN_UNUSED_RESULT MaybeHandle<Cell> ResolveExport(
Isolate* isolate, Handle<SourceTextModule> module,
Handle<String> module_specifier, Handle<String> export_name,
MessageLocation loc, bool must_resolve, ResolveSet* resolve_set);
static V8_WARN_UNUSED_RESULT MaybeHandle<Cell> ResolveImport(
Isolate* isolate, Handle<SourceTextModule> module, Handle<String> name,
int module_request, MessageLocation loc, bool must_resolve,
ResolveSet* resolve_set);
static V8_WARN_UNUSED_RESULT MaybeHandle<Cell> ResolveExportUsingStarExports(
Isolate* isolate, Handle<SourceTextModule> module,
Handle<String> module_specifier, Handle<String> export_name,
MessageLocation loc, bool must_resolve, ResolveSet* resolve_set);
static V8_WARN_UNUSED_RESULT bool PrepareInstantiate(
Isolate* isolate, Handle<SourceTextModule> module,
v8::Local<v8::Context> context, v8::Module::ResolveCallback callback);
static V8_WARN_UNUSED_RESULT bool FinishInstantiate(
Isolate* isolate, Handle<SourceTextModule> module,
ZoneForwardList<Handle<SourceTextModule>>* stack, unsigned* dfs_index,
Zone* zone);
static V8_WARN_UNUSED_RESULT bool RunInitializationCode(
Isolate* isolate, Handle<SourceTextModule> module);
static void FetchStarExports(Isolate* isolate,
Handle<SourceTextModule> module, Zone* zone,
UnorderedModuleSet* visited);
static V8_WARN_UNUSED_RESULT MaybeHandle<Object> Evaluate(
Isolate* isolate, Handle<SourceTextModule> module,
ZoneForwardList<Handle<SourceTextModule>>* stack, unsigned* dfs_index);
static V8_WARN_UNUSED_RESULT bool MaybeTransitionComponent(
Isolate* isolate, Handle<SourceTextModule> module,
ZoneForwardList<Handle<SourceTextModule>>* stack, Status new_status);
static void Reset(Isolate* isolate, Handle<SourceTextModule> module);
TQ_OBJECT_CONSTRUCTORS(SourceTextModule)
};
// SourceTextModuleInfo is to SourceTextModuleDescriptor what ScopeInfo is to
// Scope.
class SourceTextModuleInfo : public FixedArray {
public:
DECL_CAST(SourceTextModuleInfo)
static Handle<SourceTextModuleInfo> New(Isolate* isolate, Zone* zone,
SourceTextModuleDescriptor* descr);
inline FixedArray module_requests() const;
inline FixedArray special_exports() const;
inline FixedArray regular_exports() const;
inline FixedArray regular_imports() const;
inline FixedArray namespace_imports() const;
inline FixedArray module_request_positions() const;
// Accessors for [regular_exports].
int RegularExportCount() const;
String RegularExportLocalName(int i) const;
int RegularExportCellIndex(int i) const;
FixedArray RegularExportExportNames(int i) const;
#ifdef DEBUG
inline bool Equals(SourceTextModuleInfo other) const;
#endif
private:
friend class Factory;
friend class SourceTextModuleDescriptor;
enum {
kModuleRequestsIndex,
kSpecialExportsIndex,
kRegularExportsIndex,
kNamespaceImportsIndex,
kRegularImportsIndex,
kModuleRequestPositionsIndex,
kLength
};
enum {
kRegularExportLocalNameOffset,
kRegularExportCellIndexOffset,
kRegularExportExportNamesOffset,
kRegularExportLength
};
OBJECT_CONSTRUCTORS(SourceTextModuleInfo, FixedArray);
};
class SourceTextModuleInfoEntry
: public TorqueGeneratedSourceTextModuleInfoEntry<SourceTextModuleInfoEntry,
Struct> {
public:
DECL_PRINTER(SourceTextModuleInfoEntry)
DECL_VERIFIER(SourceTextModuleInfoEntry)
DECL_INT_ACCESSORS(module_request)
DECL_INT_ACCESSORS(cell_index)
DECL_INT_ACCESSORS(beg_pos)
DECL_INT_ACCESSORS(end_pos)
static Handle<SourceTextModuleInfoEntry> New(
Isolate* isolate, Handle<HeapObject> export_name,
Handle<HeapObject> local_name, Handle<HeapObject> import_name,
int module_request, int cell_index, int beg_pos, int end_pos);
TQ_OBJECT_CONSTRUCTORS(SourceTextModuleInfoEntry)
};
} // namespace internal
} // namespace v8
#include "src/objects/object-macros-undef.h"
#endif // V8_OBJECTS_SOURCE_TEXT_MODULE_H_
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