| // Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| #if !defined(DART_PRECOMPILED_RUNTIME) |
| |
| #include "vm/kernel_loader.h" |
| |
| #include <string.h> |
| |
| #include <memory> |
| |
| #include "vm/closure_functions_cache.h" |
| #include "vm/compiler/backend/flow_graph_compiler.h" |
| #include "vm/compiler/frontend/constant_reader.h" |
| #include "vm/compiler/frontend/kernel_translation_helper.h" |
| #include "vm/dart_api_impl.h" |
| #include "vm/flags.h" |
| #include "vm/heap/heap.h" |
| #include "vm/kernel_binary.h" |
| #include "vm/longjump.h" |
| #include "vm/object_store.h" |
| #include "vm/parser.h" |
| #include "vm/reusable_handles.h" |
| #include "vm/service_isolate.h" |
| #include "vm/symbols.h" |
| #include "vm/thread.h" |
| #include "vm/version.h" |
| |
| namespace dart { |
| namespace kernel { |
| |
| #define Z (zone_) |
| #define I (isolate_) |
| #define IG (thread_->isolate_group()) |
| #define T (type_translator_) |
| #define H (translation_helper_) |
| |
| static const char* const kVMServiceIOLibraryUri = "dart:vmservice_io"; |
| |
| static bool IsMainOrDevChannel() { |
| return strstr("|main|dev|", Version::Channel()) != nullptr; |
| } |
| |
| static bool is_experimental_shared_data_enabled = false; |
| static void EnableExperimentSharedData(bool value) { |
| if (value && !IsMainOrDevChannel()) { |
| FATAL( |
| "Shared memory multithreading in only available for " |
| "experimentation in dev or main"); |
| } |
| is_experimental_shared_data_enabled = value; |
| } |
| |
| DEFINE_FLAG_HANDLER(EnableExperimentSharedData, |
| experimental_shared_data, |
| "Enable experiment to share data between isolates."); |
| |
| class SimpleExpressionConverter { |
| public: |
| SimpleExpressionConverter(TranslationHelper* translation_helper, |
| KernelReaderHelper* reader_helper) |
| : translation_helper_(*translation_helper), |
| zone_(translation_helper_.zone()), |
| simple_value_(nullptr), |
| helper_(reader_helper) {} |
| |
| bool IsSimple(intptr_t kernel_offset) { |
| AlternativeReadingScope alt(&helper_->reader_, kernel_offset); |
| uint8_t payload = 0; |
| Tag tag = helper_->ReadTag(&payload); // read tag. |
| switch (tag) { |
| case kBigIntLiteral: { |
| helper_->ReadPosition(); |
| const String& literal_str = |
| H.DartString(helper_->ReadStringReference(), |
| Heap::kOld); // read index into string table. |
| simple_value_ = &Integer::ZoneHandle(Z, Integer::New(literal_str)); |
| if (simple_value_->IsNull()) { |
| H.ReportError("Integer literal %s is out of range", |
| literal_str.ToCString()); |
| UNREACHABLE(); |
| } |
| *simple_value_ = H.Canonicalize(*simple_value_); |
| return true; |
| } |
| case kStringLiteral: |
| helper_->ReadPosition(); |
| simple_value_ = &H.DartSymbolPlain( |
| helper_->ReadStringReference()); // read index into string table. |
| return true; |
| case kSpecializedIntLiteral: |
| helper_->ReadPosition(); |
| simple_value_ = |
| &Integer::ZoneHandle(Z, Integer::New(static_cast<int32_t>(payload) - |
| SpecializedIntLiteralBias, |
| Heap::kOld)); |
| *simple_value_ = H.Canonicalize(*simple_value_); |
| return true; |
| case kNegativeIntLiteral: |
| helper_->ReadPosition(); |
| simple_value_ = &Integer::ZoneHandle( |
| Z, Integer::New(-static_cast<int64_t>(helper_->ReadUInt()), |
| Heap::kOld)); // read value. |
| *simple_value_ = H.Canonicalize(*simple_value_); |
| return true; |
| case kPositiveIntLiteral: |
| helper_->ReadPosition(); |
| simple_value_ = &Integer::ZoneHandle( |
| Z, Integer::New(static_cast<int64_t>(helper_->ReadUInt()), |
| Heap::kOld)); // read value. |
| *simple_value_ = H.Canonicalize(*simple_value_); |
| return true; |
| case kDoubleLiteral: |
| helper_->ReadPosition(); |
| simple_value_ = &Double::ZoneHandle( |
| Z, Double::New(helper_->ReadDouble(), Heap::kOld)); // read value. |
| *simple_value_ = H.Canonicalize(*simple_value_); |
| return true; |
| case kTrueLiteral: |
| helper_->ReadPosition(); |
| simple_value_ = &Bool::Handle(Z, Bool::Get(true).ptr()); |
| return true; |
| case kFalseLiteral: |
| helper_->ReadPosition(); |
| simple_value_ = &Bool::Handle(Z, Bool::Get(false).ptr()); |
| return true; |
| case kNullLiteral: |
| helper_->ReadPosition(); |
| simple_value_ = &Instance::ZoneHandle(Z, Instance::null()); |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| const Instance& SimpleValue() { return *simple_value_; } |
| Zone* zone() const { return zone_; } |
| |
| private: |
| TranslationHelper& translation_helper_; |
| Zone* zone_; |
| Instance* simple_value_; |
| KernelReaderHelper* helper_; |
| |
| DISALLOW_COPY_AND_ASSIGN(SimpleExpressionConverter); |
| }; |
| |
| ArrayPtr KernelLoader::MakeFieldsArray() { |
| const intptr_t len = fields_.length(); |
| const Array& res = Array::Handle(zone_, Array::New(len, Heap::kOld)); |
| for (intptr_t i = 0; i < len; i++) { |
| res.SetAt(i, *fields_[i]); |
| } |
| return res.ptr(); |
| } |
| |
| ArrayPtr KernelLoader::MakeFunctionsArray() { |
| const intptr_t len = functions_.length(); |
| const Array& res = Array::Handle(zone_, Array::New(len, Heap::kOld)); |
| for (intptr_t i = 0; i < len; i++) { |
| res.SetAt(i, *functions_[i]); |
| } |
| return res.ptr(); |
| } |
| |
| LibraryPtr BuildingTranslationHelper::LookupLibraryByKernelLibrary( |
| NameIndex library, |
| bool required) { |
| return loader_->LookupLibrary(library); |
| } |
| |
| ClassPtr BuildingTranslationHelper::LookupClassByKernelClass(NameIndex klass, |
| bool required) { |
| #if defined(DEBUG) |
| LibraryLookupHandleScope library_lookup_handle_scope(library_lookup_handle_); |
| #endif // defined(DEBUG) |
| library_lookup_handle_ = loader_->LookupLibraryFromClass(klass); |
| return loader_->LookupClass(library_lookup_handle_, klass); |
| } |
| |
| LibraryIndex::LibraryIndex(const TypedDataView& kernel_data) |
| : reader_(kernel_data) { |
| intptr_t data_size = reader_.size(); |
| |
| procedure_count_ = reader_.ReadUInt32At(data_size - 4); |
| procedure_index_offset_ = data_size - 4 - (procedure_count_ + 1) * 4; |
| |
| class_count_ = reader_.ReadUInt32At(procedure_index_offset_ - 4); |
| class_index_offset_ = procedure_index_offset_ - 4 - (class_count_ + 1) * 4; |
| |
| source_references_offset_ = -1; |
| source_references_offset_ = reader_.ReadUInt32At(class_index_offset_ - 4); |
| } |
| |
| ClassIndex::ClassIndex(const TypedDataBase& library_kernel_data, |
| intptr_t class_offset, |
| intptr_t class_size) |
| : reader_(library_kernel_data) { |
| Init(class_offset, class_size); |
| } |
| |
| void ClassIndex::Init(intptr_t class_offset, intptr_t class_size) { |
| procedure_count_ = reader_.ReadUInt32At(class_offset + class_size - 4); |
| procedure_index_offset_ = |
| class_offset + class_size - 4 - (procedure_count_ + 1) * 4; |
| } |
| |
| using UriToSourceTable = DirectChainedHashMap<UriToSourceTableTrait>; |
| |
| KernelLoader::KernelLoader(Program* program, |
| UriToSourceTable* uri_to_source_table) |
| : program_(program), |
| thread_(Thread::Current()), |
| zone_(thread_->zone()), |
| no_active_isolate_scope_(), |
| patch_classes_(Array::Handle(zone_)), |
| active_class_(), |
| library_kernel_offset_(-1), // Set to the correct value in LoadLibrary |
| correction_offset_(-1), // Set to the correct value in LoadLibrary |
| loading_native_wrappers_library_(false), |
| library_kernel_data_(TypedDataView::Handle(zone_)), |
| kernel_program_info_(KernelProgramInfo::Handle(zone_)), |
| translation_helper_(this, thread_, Heap::kOld), |
| helper_(zone_, |
| &translation_helper_, |
| program_->binary(), |
| /*data_program_offset=*/0), |
| constant_reader_(&helper_, &active_class_), |
| type_translator_(&helper_, |
| &constant_reader_, |
| &active_class_, |
| /* finalize= */ false), |
| inferred_type_metadata_helper_(&helper_, &constant_reader_), |
| static_field_value_(Object::Handle(Z)), |
| name_index_handle_(Smi::Handle(Z)), |
| expression_evaluation_library_(Library::Handle(Z)) { |
| if (!program->is_single_program()) { |
| FATAL( |
| "Trying to load a concatenated dill file at a time where that is " |
| "not allowed"); |
| } |
| InitializeFields(uri_to_source_table); |
| } |
| |
| void KernelLoader::ReadObfuscationProhibitions() { |
| ObfuscationProhibitionsMetadataHelper helper(&helper_); |
| helper.ReadProhibitions(); |
| } |
| |
| void KernelLoader::ReadLoadingUnits() { |
| LoadingUnitsMetadataHelper helper(&helper_); |
| helper.ReadLoadingUnits(); |
| } |
| |
| Object& KernelLoader::LoadEntireProgram(Program* program, |
| bool process_pending_classes) { |
| Thread* thread = Thread::Current(); |
| |
| TIMELINE_DURATION(thread, Isolate, "LoadKernel"); |
| |
| if (program->is_single_program()) { |
| KernelLoader loader(program, /*uri_to_source_table=*/nullptr); |
| return Object::Handle(loader.LoadProgram(process_pending_classes)); |
| } |
| |
| GrowableArray<intptr_t> subprogram_file_starts; |
| { |
| kernel::Reader reader(program->binary()); |
| index_programs(&reader, &subprogram_file_starts); |
| } |
| |
| Zone* zone = thread->zone(); |
| Library& library = Library::Handle(zone); |
| intptr_t subprogram_count = subprogram_file_starts.length() - 1; |
| |
| // First index all source tables. |
| UriToSourceTable uri_to_source_table; |
| UriToSourceTableEntry wrapper; |
| Thread* thread_ = Thread::Current(); |
| Zone* zone_ = thread_->zone(); |
| for (intptr_t i = subprogram_count - 1; i >= 0; --i) { |
| intptr_t subprogram_start = subprogram_file_starts.At(i); |
| intptr_t subprogram_end = subprogram_file_starts.At(i + 1); |
| const auto& component = TypedDataBase::Handle( |
| program->binary().ViewFromTo(subprogram_start, subprogram_end)); |
| TranslationHelper translation_helper(thread); |
| KernelReaderHelper helper_(zone_, &translation_helper, component, 0); |
| const intptr_t source_table_size = helper_.SourceTableSize(); |
| for (intptr_t index = 0; index < source_table_size; ++index) { |
| const String& uri_string = helper_.SourceTableUriFor(index); |
| wrapper.uri = &uri_string; |
| TypedData& line_starts = |
| TypedData::Handle(Z, helper_.GetLineStartsFor(index)); |
| if (line_starts.Length() == 0) continue; |
| const String& script_source = helper_.GetSourceFor(index); |
| wrapper.uri = &uri_string; |
| UriToSourceTableEntry* pair = uri_to_source_table.LookupValue(&wrapper); |
| if (pair != nullptr) { |
| // At least two entries with content. Unless the content is the same |
| // that's not valid. |
| const bool src_differ = pair->sources->CompareTo(script_source) != 0; |
| const bool line_starts_differ = |
| !pair->line_starts->CanonicalizeEquals(line_starts); |
| if (src_differ || line_starts_differ) { |
| FATAL( |
| "Invalid kernel binary: Contains at least two source entries " |
| "that do not agree. URI '%s', difference: %s. Subprogram count: " |
| "%" Pd ".", |
| uri_string.ToCString(), |
| src_differ && line_starts_differ |
| ? "src and line starts" |
| : (src_differ ? "src" : "line starts"), |
| subprogram_count); |
| } |
| } else { |
| UriToSourceTableEntry* tmp = new UriToSourceTableEntry(); |
| tmp->uri = &uri_string; |
| tmp->sources = &script_source; |
| tmp->line_starts = &line_starts; |
| uri_to_source_table.Insert(tmp); |
| } |
| } |
| } |
| |
| // Create "fake programs" for each sub-program. |
| for (intptr_t i = subprogram_count - 1; i >= 0; --i) { |
| intptr_t subprogram_start = subprogram_file_starts.At(i); |
| intptr_t subprogram_end = subprogram_file_starts.At(i + 1); |
| const auto& component = TypedDataBase::Handle( |
| program->binary().ViewFromTo(subprogram_start, subprogram_end)); |
| Reader reader(component); |
| const char* error = nullptr; |
| std::unique_ptr<Program> subprogram = Program::ReadFrom(&reader, &error); |
| if (subprogram == nullptr) { |
| FATAL("Failed to load kernel file: %s", error); |
| } |
| ASSERT(subprogram->is_single_program()); |
| KernelLoader loader(subprogram.get(), &uri_to_source_table); |
| Object& load_result = Object::Handle(loader.LoadProgram(false)); |
| if (load_result.IsError()) return load_result; |
| |
| if (load_result.IsLibrary()) { |
| library ^= load_result.ptr(); |
| } |
| } |
| |
| if (process_pending_classes && !ClassFinalizer::ProcessPendingClasses()) { |
| // Class finalization failed -> sticky error would be set. |
| return Error::Handle(thread->StealStickyError()); |
| } |
| |
| return library; |
| } |
| |
| void KernelLoader::index_programs( |
| kernel::Reader* reader, |
| GrowableArray<intptr_t>* subprogram_file_starts) { |
| // Dill files can be concatenated (e.g. cat a.dill b.dill > c.dill), so we |
| // need to first index the (possibly combined) file. |
| // First entry becomes last entry. |
| // Last entry is for ease of calculating size of last subprogram. |
| subprogram_file_starts->Add(reader->size()); |
| reader->set_offset(reader->size() - 4); |
| while (reader->offset() > 0) { |
| intptr_t size = reader->ReadUInt32(); |
| intptr_t start = reader->offset() - size; |
| if (start < 0) { |
| FATAL("Invalid kernel binary: Indicated size is invalid."); |
| } |
| subprogram_file_starts->Add(start); |
| reader->set_offset(start - 4); |
| } |
| subprogram_file_starts->Reverse(); |
| } |
| |
| StringPtr KernelLoader::FindSourceForScript(const uint8_t* kernel_buffer, |
| intptr_t kernel_buffer_length, |
| const String& uri) { |
| const auto& binary = ExternalTypedData::Handle(ExternalTypedData::New( |
| kExternalTypedDataUint8ArrayCid, const_cast<uint8_t*>(kernel_buffer), |
| kernel_buffer_length, Heap::kNew)); |
| |
| Thread* thread = Thread::Current(); |
| Zone* zone = thread->zone(); |
| TranslationHelper translation_helper(thread); |
| KernelReaderHelper reader(zone, &translation_helper, binary, 0); |
| intptr_t source_table_size = reader.SourceTableSize(); |
| for (intptr_t i = 0; i < source_table_size; ++i) { |
| const String& source_uri = reader.SourceTableUriFor(i); |
| if (source_uri.EndsWith(uri)) { |
| return reader.GetSourceFor(i).ptr(); |
| } |
| } |
| return String::null(); |
| } |
| |
| void KernelLoader::InitializeFields(UriToSourceTable* uri_to_source_table) { |
| const intptr_t source_table_size = helper_.SourceTableSize(); |
| const Array& scripts = |
| Array::Handle(Z, Array::New(source_table_size, Heap::kOld)); |
| |
| const auto& binary = program_->binary(); |
| |
| // Copy the Kernel string offsets out of the binary and into the VM's heap. |
| ASSERT(program_->string_table_offset() >= 0); |
| Reader reader(binary); |
| reader.set_offset(program_->string_table_offset()); |
| intptr_t count = reader.ReadUInt() + 1; |
| const auto& offsets = TypedData::Handle( |
| Z, TypedData::New(kTypedDataUint32ArrayCid, count, Heap::kOld)); |
| offsets.SetUint32(0, 0); |
| intptr_t end_offset = 0; |
| for (intptr_t i = 1; i < count; ++i) { |
| end_offset = reader.ReadUInt(); |
| offsets.SetUint32(i << 2, end_offset); |
| } |
| |
| // Create view of the string data. |
| const auto& string_data = TypedDataView::Handle( |
| reader.ViewFromTo(reader.offset(), reader.offset() + end_offset)); |
| |
| // Create a view of the constants table. |
| const auto& constants_table = TypedDataView::Handle(reader.ViewFromTo( |
| program_->constant_table_offset(), program_->name_table_offset())); |
| |
| // Copy the canonical names into the VM's heap. Encode them as unsigned, so |
| // the parent indexes are adjusted when extracted. |
| reader.set_offset(program_->name_table_offset()); |
| count = reader.ReadUInt() * 2; |
| TypedData& names = TypedData::Handle( |
| Z, TypedData::New(kTypedDataUint32ArrayCid, count, Heap::kOld)); |
| for (intptr_t i = 0; i < count; ++i) { |
| names.SetUint32(i << 2, reader.ReadUInt()); |
| } |
| |
| // Create view of metadata payloads. |
| const auto& metadata_payloads = TypedDataView::Handle( |
| reader.ViewFromTo(program_->metadata_payloads_offset(), |
| program_->metadata_mappings_offset())); |
| |
| ASSERT(Utils::IsAligned(metadata_payloads.DataAddr(0), kWordSize)); |
| |
| // Create view of metadata mappings. |
| const auto& metadata_mappings = TypedDataView::Handle(reader.ViewFromTo( |
| program_->metadata_mappings_offset(), program_->string_table_offset())); |
| |
| #if defined(DEBUG) |
| MetadataHelper::VerifyMetadataMappings(metadata_mappings); |
| #endif |
| |
| const Array& libraries_cache = |
| Array::Handle(Z, HashTables::New<UnorderedHashMap<SmiTraits>>( |
| program_->library_count(), Heap::kOld)); |
| |
| const intptr_t kClassesPerLibraryGuess = 5; |
| const Array& classes_cache = Array::Handle( |
| Z, HashTables::New<UnorderedHashMap<SmiTraits>>( |
| kClassesPerLibraryGuess * program_->library_count(), Heap::kOld)); |
| |
| kernel_program_info_ = KernelProgramInfo::New( |
| binary, string_data, metadata_payloads, metadata_mappings, |
| constants_table, offsets, names, scripts, libraries_cache, classes_cache); |
| |
| H.InitFromKernelProgramInfo(kernel_program_info_); |
| |
| Script& script = Script::Handle(Z); |
| for (intptr_t index = 0; index < source_table_size; ++index) { |
| script = LoadScriptAt(index, uri_to_source_table); |
| scripts.SetAt(index, script); |
| } |
| } |
| |
| KernelLoader::KernelLoader(const KernelProgramInfo& kernel_program_info, |
| const TypedDataBase& kernel_data, |
| intptr_t data_program_offset) |
| : program_(nullptr), |
| thread_(Thread::Current()), |
| zone_(thread_->zone()), |
| no_active_isolate_scope_(), |
| patch_classes_(Array::Handle(zone_)), |
| library_kernel_offset_(data_program_offset), |
| correction_offset_(0), |
| loading_native_wrappers_library_(false), |
| library_kernel_data_(TypedDataView::Handle(zone_)), |
| kernel_program_info_( |
| KernelProgramInfo::Handle(zone_, kernel_program_info.ptr())), |
| translation_helper_(this, thread_, Heap::kOld), |
| helper_(zone_, &translation_helper_, kernel_data, 0), |
| constant_reader_(&helper_, &active_class_), |
| type_translator_(&helper_, |
| &constant_reader_, |
| &active_class_, |
| /* finalize= */ false), |
| inferred_type_metadata_helper_(&helper_, &constant_reader_), |
| static_field_value_(Object::Handle(Z)), |
| name_index_handle_(Smi::Handle(Z)), |
| expression_evaluation_library_(Library::Handle(Z)) { |
| ASSERT(T.active_class_ == &active_class_); |
| T.finalize_ = false; |
| H.InitFromKernelProgramInfo(kernel_program_info_); |
| } |
| |
| bool KernelLoader::IsClassName(NameIndex name, |
| const String& library, |
| const String& klass) { |
| ASSERT(H.IsClass(name)); |
| StringIndex class_name_index = H.CanonicalNameString(name); |
| |
| if (!H.StringEquals(class_name_index, klass.ToCString())) { |
| return false; |
| } |
| ASSERT(H.IsLibrary(H.CanonicalNameParent(name))); |
| StringIndex library_name_index = |
| H.CanonicalNameString(H.CanonicalNameParent(name)); |
| return H.StringEquals(library_name_index, library.ToCString()); |
| } |
| |
| ObjectPtr KernelLoader::LoadProgram(bool process_pending_classes) { |
| SafepointWriteRwLocker ml(thread_, thread_->isolate_group()->program_lock()); |
| ASSERT(kernel_program_info_.constants() == Array::null()); |
| |
| if (!program_->is_single_program()) { |
| FATAL( |
| "Trying to load a concatenated dill file at a time where that is " |
| "not allowed"); |
| } |
| |
| LongJumpScope jump; |
| if (setjmp(*jump.Set()) == 0) { |
| // Note that `problemsAsJson` on Component is implicitly skipped. |
| const intptr_t length = program_->library_count(); |
| for (intptr_t i = 0; i < length; i++) { |
| LoadLibrary(i); |
| } |
| |
| // Finalize still pending classes if requested. |
| if (process_pending_classes) { |
| if (!ClassFinalizer::ProcessPendingClasses()) { |
| // Class finalization failed -> sticky error would be set. |
| return H.thread()->StealStickyError(); |
| } |
| } |
| |
| // Sets the constants array to an empty array with the length equal to |
| // the number of constants. The array gets filled lazily while reading |
| // constants. |
| ASSERT(kernel_program_info_.constants_table() != ExternalTypedData::null()); |
| ConstantReader constant_reader(&helper_, &active_class_); |
| const intptr_t num_consts = constant_reader.NumConstants(); |
| const Array& array = Array::Handle(Z, Array::New(num_consts, Heap::kOld)); |
| for (intptr_t i = 0; i < num_consts; i++) { |
| array.SetAt(i, Object::sentinel()); |
| } |
| kernel_program_info_.set_constants(array); |
| H.SetConstants(array); // for caching |
| |
| NameIndex main = program_->main_method(); |
| if (main != -1) { |
| NameIndex main_library = H.EnclosingName(main); |
| return LookupLibrary(main_library); |
| } |
| |
| return Library::null(); |
| } |
| |
| // Either class finalization failed or we caught a compile error. |
| // In both cases sticky error would be set. |
| return Thread::Current()->StealStickyError(); |
| } |
| |
| void KernelLoader::LoadLibrary(const Library& library) { |
| // This will be invoked by VM bootstrapping code. |
| SafepointWriteRwLocker ml(thread_, thread_->isolate_group()->program_lock()); |
| |
| ASSERT(!library.Loaded()); |
| |
| const auto& uri = String::Handle(Z, library.url()); |
| const intptr_t num_libraries = program_->library_count(); |
| for (intptr_t i = 0; i < num_libraries; ++i) { |
| const String& library_uri = LibraryUri(i); |
| if (library_uri.Equals(uri)) { |
| LoadLibrary(i); |
| return; |
| } |
| } |
| } |
| |
| ObjectPtr KernelLoader::LoadExpressionEvaluationFunction( |
| const String& library_url, |
| const String& klass) { |
| // Find the original context, i.e. library/class, in which the evaluation will |
| // happen. |
| const Library& real_library = |
| Library::Handle(Z, Library::LookupLibrary(thread_, library_url)); |
| ASSERT(!real_library.IsNull()); |
| const Class& real_class = Class::Handle( |
| Z, klass.IsNull() ? real_library.toplevel_class() |
| : real_library.LookupClassAllowPrivate(klass)); |
| ASSERT(!real_class.IsNull()); |
| |
| const intptr_t num_cids = IG->class_table()->NumCids(); |
| const intptr_t num_libs = |
| GrowableObjectArray::Handle(IG->object_store()->libraries()).Length(); |
| |
| // Load the "evaluate:source" expression evaluation library. |
| ASSERT(expression_evaluation_library_.IsNull()); |
| ASSERT(H.GetExpressionEvaluationClass().IsNull()); |
| ASSERT(H.GetExpressionEvaluationFunction().IsNull()); |
| H.SetExpressionEvaluationRealClass(real_class); |
| const Object& result = Object::Handle(Z, LoadProgram(true)); |
| if (result.IsError()) { |
| return result.ptr(); |
| } |
| const Function& function = H.GetExpressionEvaluationFunction(); |
| ASSERT(!function.IsNull()); |
| ASSERT( |
| GrowableObjectArray::Handle(IG->object_store()->libraries()).Length() == |
| num_libs); |
| ASSERT(IG->class_table()->NumCids() == num_cids); |
| |
| // Make the expression evaluation function have the right script, |
| // kernel data and parent. |
| const auto& eval_script = Script::Handle(Z, function.script()); |
| ASSERT(!expression_evaluation_library_.IsNull()); |
| function.SetKernelLibraryAndEvalScript( |
| eval_script, kernel_program_info_, |
| expression_evaluation_library_.kernel_library_index()); |
| |
| function.set_owner(real_class); |
| |
| ASSERT(real_class.is_finalized()); |
| // The owner class has already been marked as finalized so the signature of |
| // this added function must be finalized here, since finalization of member |
| // types will not be called anymore. |
| FunctionType& signature = FunctionType::Handle(Z, function.signature()); |
| if (!function.is_static()) { |
| // Patch the illegal receiver type (type class with kIllegalCid) to dynamic. |
| signature.SetParameterTypeAt(0, Object::dynamic_type()); |
| } |
| signature ^= ClassFinalizer::FinalizeType(signature); |
| function.SetSignature(signature); |
| |
| return function.ptr(); |
| } |
| |
| void KernelLoader::FindModifiedLibraries(Program* program, |
| IsolateGroup* isolate_group, |
| BitVector* modified_libs, |
| bool force_reload, |
| bool* is_empty_program, |
| intptr_t* p_num_classes, |
| intptr_t* p_num_procedures) { |
| LongJumpScope jump; |
| Zone* zone = Thread::Current()->zone(); |
| if (setjmp(*jump.Set()) == 0) { |
| if (force_reload) { |
| // If a reload is being forced we mark all libraries as having |
| // been modified. |
| const auto& libs = GrowableObjectArray::Handle( |
| isolate_group->object_store()->libraries()); |
| intptr_t num_libs = libs.Length(); |
| Library& lib = dart::Library::Handle(zone); |
| for (intptr_t i = 0; i < num_libs; i++) { |
| lib ^= libs.At(i); |
| if (!lib.is_dart_scheme()) { |
| modified_libs->Add(lib.index()); |
| } |
| } |
| return; |
| } |
| |
| if (p_num_classes != nullptr) { |
| *p_num_classes = 0; |
| } |
| if (p_num_procedures != nullptr) { |
| *p_num_procedures = 0; |
| } |
| |
| // Now go through all the libraries that are present in the incremental |
| // kernel files, these will constitute the modified libraries. |
| *is_empty_program = true; |
| if (program->is_single_program()) { |
| KernelLoader loader(program, /*uri_to_source_table=*/nullptr); |
| loader.walk_incremental_kernel(modified_libs, is_empty_program, |
| p_num_classes, p_num_procedures); |
| } |
| |
| GrowableArray<intptr_t> subprogram_file_starts; |
| { |
| kernel::Reader reader(program->binary()); |
| index_programs(&reader, &subprogram_file_starts); |
| } |
| |
| // Create "fake programs" for each sub-program. |
| intptr_t subprogram_count = subprogram_file_starts.length() - 1; |
| for (intptr_t i = 0; i < subprogram_count; ++i) { |
| intptr_t subprogram_start = subprogram_file_starts.At(i); |
| intptr_t subprogram_end = subprogram_file_starts.At(i + 1); |
| const auto& component = TypedDataBase::Handle( |
| program->binary().ViewFromTo(subprogram_start, subprogram_end)); |
| Reader reader(component); |
| const char* error = nullptr; |
| std::unique_ptr<Program> subprogram = Program::ReadFrom(&reader, &error); |
| if (subprogram == nullptr) { |
| FATAL("Failed to load kernel file: %s", error); |
| } |
| ASSERT(subprogram->is_single_program()); |
| KernelLoader loader(subprogram.get(), /*uri_to_source_table=*/nullptr); |
| loader.walk_incremental_kernel(modified_libs, is_empty_program, |
| p_num_classes, p_num_procedures); |
| } |
| } |
| } |
| |
| void KernelLoader::walk_incremental_kernel(BitVector* modified_libs, |
| bool* is_empty_program, |
| intptr_t* p_num_classes, |
| intptr_t* p_num_procedures) { |
| intptr_t length = program_->library_count(); |
| *is_empty_program = *is_empty_program && (length == 0); |
| bool collect_library_stats = |
| p_num_classes != nullptr || p_num_procedures != nullptr; |
| intptr_t num_classes = 0; |
| intptr_t num_procedures = 0; |
| Library& lib = Library::Handle(Z); |
| for (intptr_t i = 0; i < length; i++) { |
| intptr_t kernel_offset = library_offset(i); |
| helper_.SetOffset(kernel_offset); |
| LibraryHelper library_helper(&helper_); |
| library_helper.ReadUntilIncluding(LibraryHelper::kCanonicalName); |
| lib = LookupLibraryOrNull(library_helper.canonical_name_); |
| if (!lib.IsNull() && !lib.is_dart_scheme()) { |
| // This is a library that already exists so mark it as being modified. |
| modified_libs->Add(lib.index()); |
| } |
| if (collect_library_stats) { |
| intptr_t library_end = library_offset(i + 1); |
| library_kernel_data_ = |
| helper_.reader_.ViewFromTo(kernel_offset, library_end); |
| LibraryIndex library_index(library_kernel_data_); |
| num_classes += library_index.class_count(); |
| num_procedures += library_index.procedure_count(); |
| } |
| } |
| if (p_num_classes != nullptr) { |
| *p_num_classes += num_classes; |
| } |
| if (p_num_procedures != nullptr) { |
| *p_num_procedures += num_procedures; |
| } |
| } |
| |
| void KernelLoader::ReadInferredType(const Field& field, |
| intptr_t kernel_offset) { |
| const InferredTypeMetadata type = |
| inferred_type_metadata_helper_.GetInferredType(kernel_offset, |
| /*read_constant=*/false); |
| if (type.IsTrivial()) { |
| return; |
| } |
| field.set_guarded_cid(type.cid); |
| field.set_is_nullable(type.IsNullable()); |
| field.set_guarded_list_length(Field::kNoFixedLength); |
| if (FLAG_precompiled_mode) { |
| field.set_is_unboxed(!field.is_late() && !field.is_static() && |
| !field.is_nullable() && |
| ((field.guarded_cid() == kDoubleCid) || |
| (field.guarded_cid() == kFloat32x4Cid && |
| FlowGraphCompiler::SupportsUnboxedSimd128()) || |
| (field.guarded_cid() == kFloat64x2Cid && |
| FlowGraphCompiler::SupportsUnboxedSimd128()) || |
| type.IsInt())); |
| } |
| } |
| |
| void KernelLoader::CheckForInitializer(const Field& field) { |
| if (helper_.PeekTag() == kSomething) { |
| field.set_has_initializer(true); |
| SimpleExpressionConverter converter(&H, &helper_); |
| const bool has_simple_initializer = |
| converter.IsSimple(helper_.ReaderOffset() + 1); |
| if (!has_simple_initializer || |
| (!field.is_static() && !converter.SimpleValue().IsNull())) { |
| field.set_has_nontrivial_initializer(true); |
| } |
| return; |
| } |
| field.set_has_initializer(false); |
| field.set_has_nontrivial_initializer(false); |
| } |
| |
| LibraryPtr KernelLoader::LoadLibrary(intptr_t index) { |
| if (!program_->is_single_program()) { |
| FATAL( |
| "Trying to load a concatenated dill file at a time where that is " |
| "not allowed"); |
| } |
| |
| // Read library index. |
| library_kernel_offset_ = library_offset(index); |
| correction_offset_ = library_kernel_offset_; |
| intptr_t library_end = library_offset(index + 1); |
| intptr_t library_size = library_end - library_kernel_offset_; |
| |
| // NOTE: Since |helper_| is used to load the overall kernel program, |
| // it's reader's offset is an offset into the overall kernel program. |
| // Hence, when setting the kernel offsets of field and functions, one |
| // has to subtract the library's kernel offset from the reader's |
| // offset. |
| helper_.SetOffset(library_kernel_offset_); |
| |
| LibraryHelper library_helper(&helper_); |
| library_helper.ReadUntilIncluding(LibraryHelper::kCanonicalName); |
| if (!FLAG_precompiled_mode && !IG->should_load_vmservice()) { |
| StringIndex lib_name_index = |
| H.CanonicalNameString(library_helper.canonical_name_); |
| if (H.StringEquals(lib_name_index, kVMServiceIOLibraryUri)) { |
| // We are not the service isolate and we are not generating an AOT |
| // snapshot so we skip loading 'dart:vmservice_io'. |
| skip_vmservice_library_ = library_helper.canonical_name_; |
| ASSERT(H.IsLibrary(skip_vmservice_library_)); |
| return Library::null(); |
| } |
| } |
| |
| Library& library = |
| Library::Handle(Z, LookupLibrary(library_helper.canonical_name_)); |
| |
| if (library.Loaded()) return library.ptr(); |
| |
| const NNBDCompiledMode mode = |
| library_helper.GetNonNullableByDefaultCompiledMode(); |
| if (mode == NNBDCompiledMode::kInvalid) { |
| H.ReportError( |
| "Library '%s' was compiled in an unsupported mixed mode between sound " |
| "null safety and not sound null safety.", |
| String::Handle(library.url()).ToCString()); |
| } |
| if (mode == NNBDCompiledMode::kWeak) { |
| H.ReportError( |
| "Library '%s' was compiled without sound null safety (in weak mode) " |
| "and it cannot be used at runtime", |
| String::Handle(library.url()).ToCString()); |
| } |
| |
| library_kernel_data_ = helper_.reader_.ViewFromTo( |
| library_kernel_offset_, library_kernel_offset_ + library_size); |
| library.set_kernel_library_index(index); |
| library.set_kernel_program_info(kernel_program_info_); |
| |
| const intptr_t start_offset = |
| kernel_program_info_.KernelLibraryStartOffset(index); |
| const intptr_t end_offset = |
| kernel_program_info_.KernelLibraryEndOffset(index); |
| library_kernel_data_ = helper_.reader_.ViewFromTo(start_offset, end_offset); |
| LibraryIndex library_index(library_kernel_data_); |
| intptr_t class_count = library_index.class_count(); |
| |
| library_helper.ReadUntilIncluding(LibraryHelper::kName); |
| library.SetName(H.DartSymbolObfuscate(library_helper.name_index_)); |
| |
| // The bootstrapper will take care of creating the native wrapper classes, but |
| // we will add the synthetic constructors to them here. |
| if (library.name() == |
| Symbols::Symbol(Symbols::kDartNativeWrappersLibNameId).ptr()) { |
| ASSERT(library.LoadInProgress()); |
| loading_native_wrappers_library_ = true; |
| } else { |
| loading_native_wrappers_library_ = false; |
| library.SetLoadInProgress(); |
| } |
| |
| if (library.url() == Symbols::vm_ffi_native_assets().ptr()) { |
| // Hot reload replaces an old native assets library. |
| // TODO(https://github.com/dart-lang/sdk/issues/55519): If we start |
| // supporting caching of asset lookup, we should empty the caches derived |
| // from the native assets library. |
| IG->object_store()->set_native_assets_library(library); |
| } |
| |
| library_helper.ReadUntilIncluding(LibraryHelper::kSourceUriIndex); |
| const Script& script = |
| Script::Handle(Z, ScriptAt(library_helper.source_uri_index_)); |
| |
| library_helper.ReadUntilExcluding(LibraryHelper::kAnnotations); |
| intptr_t annotations_kernel_offset = |
| helper_.ReaderOffset() - correction_offset_; |
| const intptr_t annotation_count = |
| helper_.ReadListLength(); // read list length. |
| for (intptr_t i = 0; i < annotation_count; ++i) { |
| helper_.SkipExpression(); // read ith annotation. |
| } |
| library_helper.SetJustRead(LibraryHelper::kAnnotations); |
| |
| // Setup toplevel class (which contains library fields/procedures). |
| |
| // We do not register expression evaluation classes with the VM: |
| // The expression evaluation functions should be GC-able as soon as |
| // they are not reachable anymore and we never look them up by name. |
| const bool register_class = |
| library.ptr() != expression_evaluation_library_.ptr(); |
| |
| Class& toplevel_class = |
| Class::Handle(Z, Class::New(library, Symbols::TopLevel(), script, |
| TokenPosition::kNoSource, register_class)); |
| toplevel_class.set_is_abstract(); |
| toplevel_class.set_is_declaration_loaded(); |
| toplevel_class.set_is_type_finalized(); |
| toplevel_class.set_num_type_arguments_unsafe(0); |
| library.set_toplevel_class(toplevel_class); |
| |
| library_helper.ReadUntilExcluding(LibraryHelper::kDependencies); |
| LoadLibraryImportsAndExports(&library, toplevel_class); |
| library_helper.SetJustRead(LibraryHelper::kDependencies); |
| |
| // Everything up til the classes are skipped implicitly, and library_helper |
| // is no longer used. |
| |
| const GrowableObjectArray& classes = |
| GrowableObjectArray::Handle(Z, IG->object_store()->pending_classes()); |
| |
| // Load all classes. |
| intptr_t next_class_offset = library_index.ClassOffset(0); |
| Class& klass = Class::Handle(Z); |
| for (intptr_t i = 0; i < class_count; ++i) { |
| helper_.SetOffset(next_class_offset); |
| next_class_offset = library_index.ClassOffset(i + 1); |
| LoadClass(library, toplevel_class, next_class_offset, &klass); |
| if (register_class) { |
| classes.Add(klass, Heap::kOld); |
| } |
| } |
| |
| if (loading_native_wrappers_library_ || !register_class) { |
| FinishTopLevelClassLoading(toplevel_class, library, library_index); |
| } |
| |
| // Used for mirrors and allows VM to recognize @pragma annotations on |
| // libraries. |
| if (annotation_count > 0) { |
| ASSERT(annotations_kernel_offset > 0); |
| library.AddMetadata(library, annotations_kernel_offset); |
| } |
| |
| if (register_class) { |
| helper_.SetOffset(library_index.SourceReferencesOffset()); |
| intptr_t count = helper_.ReadUInt(); |
| const GrowableObjectArray& used_scripts = |
| GrowableObjectArray::Handle(library.used_scripts()); |
| Script& script = Script::Handle(Z); |
| for (intptr_t i = 0; i < count; i++) { |
| intptr_t uri_index = helper_.ReadUInt(); |
| script = ScriptAt(uri_index); |
| used_scripts.Add(script); |
| } |
| } |
| if (!library.Loaded()) library.SetLoaded(); |
| |
| return library.ptr(); |
| } |
| |
| void KernelLoader::FinishTopLevelClassLoading( |
| const Class& toplevel_class, |
| const Library& library, |
| const LibraryIndex& library_index) { |
| if (toplevel_class.is_loaded()) { |
| return; |
| } |
| TIMELINE_DURATION(Thread::Current(), Isolate, "FinishTopLevelClassLoading"); |
| |
| ActiveClassScope active_class_scope(&active_class_, &toplevel_class); |
| |
| // Offsets within library index are whole program offsets and not |
| // relative to the library. |
| const intptr_t correction = correction_offset_ - library_kernel_offset_; |
| helper_.SetOffset(library_index.ClassOffset(library_index.class_count()) + |
| correction); |
| |
| const intptr_t extension_count = helper_.ReadListLength(); |
| for (intptr_t i = 0; i < extension_count; ++i) { |
| helper_.ReadTag(); // read tag. |
| helper_.SkipCanonicalNameReference(); // skip canonical name. |
| helper_.SkipStringReference(); // skip name. |
| helper_.SkipListOfExpressions(); // skip annotations. |
| helper_.ReadUInt(); // read source uri index. |
| helper_.ReadPosition(); // read file offset. |
| helper_.ReadByte(); // skip flags. |
| helper_.SkipTypeParametersList(); // skip type parameter list. |
| helper_.SkipDartType(); // skip on-type. |
| |
| const intptr_t extension_member_count = helper_.ReadListLength(); |
| for (intptr_t j = 0; j < extension_member_count; ++j) { |
| helper_.SkipName(); // skip name. |
| helper_.ReadByte(); // read kind. |
| helper_.ReadByte(); // read flags. |
| helper_.SkipCanonicalNameReference(); // skip member reference |
| helper_.SkipCanonicalNameReference(); // skip tear-off reference |
| } |
| } |
| |
| const intptr_t extension_type_declaration_count = helper_.ReadListLength(); |
| for (intptr_t i = 0; i < extension_type_declaration_count; ++i) { |
| helper_.ReadTag(); // read tag. |
| helper_.SkipCanonicalNameReference(); // skip canonical name. |
| helper_.SkipStringReference(); // skip name. |
| helper_.SkipListOfExpressions(); // skip annotations. |
| helper_.ReadUInt(); // read source uri index. |
| helper_.ReadPosition(); // read file offset. |
| helper_.ReadByte(); // skip flags. |
| helper_.SkipTypeParametersList(); // skip type parameter list. |
| helper_.SkipDartType(); // skip declared representation type. |
| helper_.SkipStringReference(); // skip representation name. |
| helper_.SkipListOfDartTypes(); // skip implements types. |
| |
| // Skip extension type procedures. |
| const intptr_t extension_type_procedure_count = |
| helper_.ReadListLength(); // read list length. |
| for (intptr_t i = 0; i < extension_type_procedure_count; ++i) { |
| ProcedureHelper procedure_helper(&helper_); |
| procedure_helper.ReadUntilExcluding(ProcedureHelper::kEnd); |
| } |
| |
| const intptr_t extension_type_member_count = helper_.ReadListLength(); |
| for (intptr_t j = 0; j < extension_type_member_count; ++j) { |
| helper_.SkipName(); // skip name. |
| helper_.ReadByte(); // read kind. |
| helper_.ReadByte(); // read flags. |
| helper_.SkipCanonicalNameReference(); // skip member reference |
| helper_.SkipCanonicalNameReference(); // skip tear-off reference |
| } |
| } |
| |
| fields_.Clear(); |
| functions_.Clear(); |
| |
| // Load toplevel fields. |
| const intptr_t field_count = helper_.ReadListLength(); // read list length. |
| for (intptr_t i = 0; i < field_count; ++i) { |
| intptr_t field_offset = helper_.ReaderOffset() - correction_offset_; |
| ActiveMemberScope active_member_scope(&active_class_, nullptr); |
| FieldHelper field_helper(&helper_); |
| field_helper.ReadUntilExcluding(FieldHelper::kName); |
| |
| const String& name = helper_.ReadNameAsFieldName(); |
| field_helper.SetJustRead(FieldHelper::kName); |
| |
| field_helper.ReadUntilExcluding(FieldHelper::kAnnotations); |
| intptr_t annotation_count = helper_.ReadListLength(); |
| uint32_t pragma_bits = 0; |
| ReadVMAnnotations(annotation_count, &pragma_bits); |
| field_helper.SetJustRead(FieldHelper::kAnnotations); |
| |
| field_helper.ReadUntilExcluding(FieldHelper::kType); |
| const Object& script_class = |
| ClassForScriptAt(toplevel_class, field_helper.source_uri_index_); |
| // In the VM all const fields are implicitly final whereas in Kernel they |
| // are not final because they are not explicitly declared that way. |
| const bool is_final = field_helper.IsConst() || field_helper.IsFinal(); |
| // Only instance fields could be covariant. |
| ASSERT(!field_helper.IsCovariant() && |
| !field_helper.IsGenericCovariantImpl()); |
| const bool is_late = field_helper.IsLate(); |
| const bool is_extension_member = field_helper.IsExtensionMember(); |
| const bool is_extension_type_member = field_helper.IsExtensionTypeMember(); |
| const Field& field = Field::Handle( |
| Z, Field::NewTopLevel(name, is_final, field_helper.IsConst(), is_late, |
| script_class, field_helper.position_, |
| field_helper.end_position_)); |
| field.set_kernel_offset(field_offset); |
| field.set_has_pragma(HasPragma::decode(pragma_bits)); |
| field.set_is_extension_member(is_extension_member); |
| field.set_is_extension_type_member(is_extension_type_member); |
| field.set_is_shared(SharedPragma::decode(pragma_bits)); |
| const AbstractType& type = T.BuildType(); // read type. |
| field.SetFieldType(type); |
| ReadInferredType(field, field_offset + library_kernel_offset_); |
| CheckForInitializer(field); |
| // Static fields with initializers are implicitly late. |
| if (field.has_initializer()) { |
| field.set_is_late(true); |
| } |
| field_helper.SetJustRead(FieldHelper::kType); |
| field_helper.ReadUntilExcluding(FieldHelper::kInitializer); |
| intptr_t field_initializer_offset = helper_.ReaderOffset(); |
| field_helper.ReadUntilExcluding(FieldHelper::kEnd); |
| |
| { |
| AlternativeReadingScope alt(&helper_.reader_, field_initializer_offset); |
| static_field_value_ = ReadInitialFieldValue(field, &field_helper); |
| } |
| GenerateFieldAccessors(toplevel_class, field, &field_helper); |
| IG->RegisterStaticField(field, static_field_value_); |
| |
| if ((FLAG_enable_mirrors || HasPragma::decode(pragma_bits)) && |
| annotation_count > 0) { |
| library.AddMetadata(field, field_offset); |
| } |
| fields_.Add(&field); |
| } |
| |
| ASSERT(!toplevel_class.is_loaded()); |
| |
| // Load toplevel procedures. |
| intptr_t next_procedure_offset = |
| library_index.ProcedureOffset(0) + correction; |
| const intptr_t procedure_count = library_index.procedure_count(); |
| for (intptr_t i = 0; i < procedure_count; ++i) { |
| helper_.SetOffset(next_procedure_offset); |
| next_procedure_offset = library_index.ProcedureOffset(i + 1) + correction; |
| LoadProcedure(library, toplevel_class, false, next_procedure_offset); |
| // LoadProcedure calls Library::GetMetadata which invokes Dart code |
| // which may recursively trigger class finalization and |
| // FinishTopLevelClassLoading. |
| // In such case, return immediately and avoid overwriting already finalized |
| // functions with freshly loaded and not yet finalized. |
| if (toplevel_class.is_loaded()) { |
| return; |
| } |
| } |
| |
| toplevel_class.SetFields(Array::Handle(MakeFieldsArray())); |
| toplevel_class.SetFunctions(Array::Handle(MakeFunctionsArray())); |
| |
| String& name = String::Handle(Z); |
| for (intptr_t i = 0, n = fields_.length(); i < n; ++i) { |
| const Field* field = fields_.At(i); |
| name = field->name(); |
| library.AddObject(*field, name); |
| } |
| for (intptr_t i = 0, n = functions_.length(); i < n; ++i) { |
| const Function* function = functions_.At(i); |
| name = function->name(); |
| library.AddObject(*function, name); |
| } |
| |
| ASSERT(!toplevel_class.is_loaded()); |
| toplevel_class.set_is_loaded(true); |
| } |
| |
| void KernelLoader::LoadLibraryImportsAndExports(Library* library, |
| const Class& toplevel_class) { |
| GrowableObjectArray& show_list = GrowableObjectArray::Handle(Z); |
| GrowableObjectArray& hide_list = GrowableObjectArray::Handle(Z); |
| Array& show_names = Array::Handle(Z); |
| Array& hide_names = Array::Handle(Z); |
| Namespace& ns = Namespace::Handle(Z); |
| LibraryPrefix& library_prefix = LibraryPrefix::Handle(Z); |
| |
| const intptr_t deps_count = helper_.ReadListLength(); |
| const Array& deps = Array::Handle(Array::New(deps_count)); |
| for (intptr_t dep = 0; dep < deps_count; ++dep) { |
| LibraryDependencyHelper dependency_helper(&helper_); |
| |
| dependency_helper.ReadUntilExcluding(LibraryDependencyHelper::kAnnotations); |
| intptr_t annotations_kernel_offset = |
| helper_.ReaderOffset() - correction_offset_; |
| |
| dependency_helper.ReadUntilExcluding(LibraryDependencyHelper::kCombinators); |
| |
| // Ignore the dependency if the target library is invalid. |
| // The error will be caught during compilation. |
| if (dependency_helper.target_library_canonical_name_ < 0) { |
| const intptr_t combinator_count = helper_.ReadListLength(); |
| for (intptr_t c = 0; c < combinator_count; ++c) { |
| helper_.SkipLibraryCombinator(); |
| } |
| continue; |
| } |
| |
| // Prepare show and hide lists. |
| show_list = GrowableObjectArray::New(Heap::kOld); |
| hide_list = GrowableObjectArray::New(Heap::kOld); |
| const intptr_t combinator_count = helper_.ReadListLength(); |
| for (intptr_t c = 0; c < combinator_count; ++c) { |
| uint8_t flags = helper_.ReadFlags(); |
| intptr_t name_count = helper_.ReadListLength(); |
| for (intptr_t n = 0; n < name_count; ++n) { |
| String& show_hide_name = |
| H.DartSymbolObfuscate(helper_.ReadStringReference()); |
| if ((flags & LibraryDependencyHelper::Show) != 0) { |
| show_list.Add(show_hide_name, Heap::kOld); |
| } else { |
| hide_list.Add(show_hide_name, Heap::kOld); |
| } |
| } |
| } |
| |
| if (show_list.Length() > 0) { |
| show_names = Array::MakeFixedLength(show_list); |
| } else { |
| show_names = Array::null(); |
| } |
| |
| if (hide_list.Length() > 0) { |
| hide_names = Array::MakeFixedLength(hide_list); |
| } else { |
| hide_names = Array::null(); |
| } |
| |
| Library& target_library = Library::Handle( |
| Z, LookupLibrary(dependency_helper.target_library_canonical_name_)); |
| if (!FLAG_enable_mirrors && |
| target_library.url() == Symbols::DartMirrors().ptr()) { |
| H.ReportError( |
| "import of dart:mirrors is not supported in the current Dart " |
| "runtime"); |
| } |
| if (!Api::IsFfiEnabled() && |
| target_library.url() == Symbols::DartFfi().ptr() && |
| library->url() != Symbols::DartCore().ptr() && |
| library->url() != Symbols::DartConcurrent().ptr() && |
| library->url() != Symbols::DartInternal().ptr() && |
| library->url() != Symbols::DartFfi().ptr()) { |
| H.ReportError( |
| "import of dart:ffi is not supported in the current Dart runtime"); |
| } |
| if (target_library.url() == Symbols::DartConcurrent().ptr() && |
| !is_experimental_shared_data_enabled) { |
| FATAL( |
| "Encountered dart:concurrent when functionality is disabled. " |
| "Pass --experimental-shared-data"); |
| } |
| String& prefix = H.DartSymbolPlain(dependency_helper.name_index_); |
| ns = Namespace::New(target_library, show_names, hide_names, *library); |
| if ((dependency_helper.flags_ & LibraryDependencyHelper::Export) != 0) { |
| library->AddExport(ns); |
| } else { |
| if (prefix.IsNull() || prefix.Length() == 0) { |
| library->AddImport(ns); |
| } else { |
| library_prefix = library->LookupLocalLibraryPrefix(prefix); |
| if (!library_prefix.IsNull()) { |
| library_prefix.AddImport(ns); |
| } else { |
| library_prefix = LibraryPrefix::New( |
| prefix, ns, |
| (dependency_helper.flags_ & LibraryDependencyHelper::Deferred) != |
| 0, |
| *library); |
| library->AddObject(library_prefix, prefix); |
| } |
| } |
| } |
| |
| if (FLAG_enable_mirrors && dependency_helper.annotation_count_ > 0) { |
| ASSERT(annotations_kernel_offset > 0); |
| library->AddMetadata(ns, annotations_kernel_offset); |
| } |
| |
| if (prefix.IsNull()) { |
| deps.SetAt(dep, ns); |
| } else { |
| deps.SetAt(dep, library_prefix); |
| } |
| } |
| |
| library->set_dependencies(deps); |
| } |
| |
| void KernelLoader::LoadPreliminaryClass(ClassHelper* class_helper, |
| intptr_t type_parameter_count) { |
| const Class* klass = active_class_.klass; |
| |
| // Enable access to type_parameters(). |
| klass->set_is_declaration_loaded(); |
| |
| // Note: This assumes that ClassHelper is exactly at the position where |
| // the length of the type parameters have been read, and that the order in |
| // the binary is as follows: [...], kTypeParameters, kSuperClass, kMixinType, |
| // kImplementedClasses, [...]. |
| |
| // Set type parameters. |
| T.LoadAndSetupTypeParameters(&active_class_, Object::null_function(), *klass, |
| Object::null_function_type(), |
| type_parameter_count); |
| |
| ActiveTypeParametersScope scope(&active_class_, nullptr, Z); |
| |
| T.LoadAndSetupBounds(&active_class_, Object::null_function(), *klass, |
| Object::null_function_type(), type_parameter_count); |
| |
| // Set super type. Some classes (e.g., Object) do not have one. |
| Tag type_tag = helper_.ReadTag(); // read super class type (part 1). |
| if (type_tag == kSomething) { |
| AbstractType& super_type = |
| T.BuildTypeWithoutFinalization(); // read super class type (part 2). |
| klass->set_super_type(Type::Cast(super_type)); |
| } |
| |
| class_helper->SetJustRead(ClassHelper::kSuperClass); |
| class_helper->ReadUntilIncluding(ClassHelper::kMixinType); |
| |
| // Build implemented interface types |
| intptr_t interface_count = helper_.ReadListLength(); |
| if (interface_count == 0) { |
| klass->set_interfaces(Object::empty_array()); |
| } else { |
| const Array& interfaces = |
| Array::Handle(Z, Array::New(interface_count, Heap::kOld)); |
| for (intptr_t i = 0; i < interface_count; i++) { |
| const AbstractType& type = |
| T.BuildTypeWithoutFinalization(); // read ith type. |
| interfaces.SetAt(i, type); |
| } |
| klass->set_interfaces(interfaces); |
| } |
| class_helper->SetJustRead(ClassHelper::kImplementedClasses); |
| |
| if (class_helper->is_abstract()) { |
| klass->set_is_abstract(); |
| } |
| if (class_helper->is_transformed_mixin_application()) { |
| klass->set_is_transformed_mixin_application(); |
| } |
| if (class_helper->has_const_constructor()) { |
| klass->set_is_const(); |
| } |
| if (class_helper->is_sealed()) { |
| klass->set_is_sealed(); |
| } |
| if (class_helper->is_mixin_class()) { |
| klass->set_is_mixin_class(); |
| } |
| if (class_helper->is_base()) { |
| klass->set_is_base_class(); |
| } |
| if (class_helper->is_interface()) { |
| klass->set_is_interface_class(); |
| } |
| if (class_helper->is_final()) { |
| klass->set_is_final(); |
| } |
| } |
| |
| void KernelLoader::LoadClass(const Library& library, |
| const Class& toplevel_class, |
| intptr_t class_end, |
| Class* out_class) { |
| intptr_t class_offset = helper_.ReaderOffset(); |
| ClassIndex class_index(program_->binary(), class_offset, |
| class_end - class_offset); |
| |
| ClassHelper class_helper(&helper_); |
| class_helper.ReadUntilIncluding(ClassHelper::kCanonicalName); |
| *out_class = LookupClass(library, class_helper.canonical_name_); |
| out_class->set_kernel_offset(class_offset - correction_offset_); |
| |
| // The class needs to have a script because all the functions in the class |
| // will inherit it. The predicate Function::IsOptimizable uses the absence of |
| // a script to detect test functions that should not be optimized. |
| if (out_class->script() == Script::null()) { |
| class_helper.ReadUntilIncluding(ClassHelper::kSourceUriIndex); |
| const Script& script = |
| Script::Handle(Z, ScriptAt(class_helper.source_uri_index_)); |
| out_class->set_script(script); |
| } |
| if (out_class->token_pos() == TokenPosition::kNoSource) { |
| class_helper.ReadUntilIncluding(ClassHelper::kEndPosition); |
| out_class->set_token_pos(class_helper.start_position_); |
| out_class->set_end_token_pos(class_helper.end_position_); |
| } |
| |
| class_helper.ReadUntilIncluding(ClassHelper::kFlags); |
| if (class_helper.is_enum_class()) { |
| out_class->set_is_enum_class(); |
| } |
| |
| class_helper.ReadUntilExcluding(ClassHelper::kAnnotations); |
| intptr_t annotation_count = helper_.ReadListLength(); |
| uint32_t pragma_bits = 0; |
| ReadVMAnnotations(annotation_count, &pragma_bits); |
| if (IsolateUnsendablePragma::decode(pragma_bits)) { |
| out_class->set_is_isolate_unsendable_due_to_pragma(true); |
| } |
| if (DeeplyImmutablePragma::decode(pragma_bits)) { |
| out_class->set_is_deeply_immutable(true); |
| // Ensure that the pragma implies deeply immutability for VM recognized |
| // classes. |
| ASSERT(out_class->id() >= kNumPredefinedCids || |
| IsDeeplyImmutableCid(out_class->id())); |
| } |
| if (HasPragma::decode(pragma_bits)) { |
| out_class->set_has_pragma(true); |
| } |
| if (DynModuleExtendablePragma::decode(pragma_bits)) { |
| out_class->set_is_dynamically_extendable(true); |
| IG->set_has_dynamically_extendable_classes(true); |
| } |
| class_helper.SetJustRead(ClassHelper::kAnnotations); |
| class_helper.ReadUntilExcluding(ClassHelper::kTypeParameters); |
| intptr_t type_parameter_counts = |
| helper_.ReadListLength(); // read type_parameters list length. |
| |
| ActiveClassScope active_class_scope(&active_class_, out_class); |
| if (!out_class->is_declaration_loaded()) { |
| LoadPreliminaryClass(&class_helper, type_parameter_counts); |
| } else { |
| ASSERT(type_parameter_counts == 0); |
| class_helper.SetJustRead(ClassHelper::kTypeParameters); |
| } |
| |
| if ((FLAG_enable_mirrors || HasPragma::decode(pragma_bits)) && |
| annotation_count > 0) { |
| library.AddMetadata(*out_class, class_offset - correction_offset_); |
| } |
| |
| // We do not register expression evaluation classes with the VM: |
| // The expression evaluation functions should be GC-able as soon as |
| // they are not reachable anymore and we never look them up by name. |
| const bool register_class = |
| library.ptr() != expression_evaluation_library_.ptr(); |
| if (!register_class) { |
| H.SetExpressionEvaluationClass(*out_class); |
| } |
| |
| if (loading_native_wrappers_library_ || !register_class) { |
| FinishClassLoading(*out_class, library, toplevel_class, class_offset, |
| class_index, &class_helper); |
| } |
| |
| helper_.SetOffset(class_end); |
| } |
| |
| void KernelLoader::FinishClassLoading(const Class& klass, |
| const Library& library, |
| const Class& toplevel_class, |
| intptr_t class_offset, |
| const ClassIndex& class_index, |
| ClassHelper* class_helper) { |
| if (klass.is_loaded()) { |
| return; |
| } |
| |
| TIMELINE_DURATION(Thread::Current(), Isolate, "FinishClassLoading"); |
| |
| ActiveClassScope active_class_scope(&active_class_, &klass); |
| |
| // If this is a dart:internal.ClassID class ignore field declarations |
| // contained in the Kernel file and instead inject our own const |
| // fields. |
| const bool discard_fields = klass.InjectCIDFields(); |
| |
| fields_.Clear(); |
| functions_.Clear(); |
| if (!discard_fields) { |
| class_helper->ReadUntilExcluding(ClassHelper::kFields); |
| int field_count = helper_.ReadListLength(); // read list length. |
| for (intptr_t i = 0; i < field_count; ++i) { |
| intptr_t field_offset = helper_.ReaderOffset() - correction_offset_; |
| ActiveMemberScope active_member(&active_class_, nullptr); |
| FieldHelper field_helper(&helper_); |
| |
| field_helper.ReadUntilIncluding(FieldHelper::kSourceUriIndex); |
| const Object& script_class = |
| ClassForScriptAt(klass, field_helper.source_uri_index_); |
| |
| field_helper.ReadUntilExcluding(FieldHelper::kName); |
| const String& name = helper_.ReadNameAsFieldName(); |
| field_helper.SetJustRead(FieldHelper::kName); |
| |
| field_helper.ReadUntilExcluding(FieldHelper::kAnnotations); |
| const intptr_t annotation_count = helper_.ReadListLength(); |
| uint32_t pragma_bits = 0; |
| ReadVMAnnotations(annotation_count, &pragma_bits); |
| field_helper.SetJustRead(FieldHelper::kAnnotations); |
| |
| field_helper.ReadUntilExcluding(FieldHelper::kType); |
| const AbstractType& type = |
| T.BuildTypeWithoutFinalization(); // read type. |
| field_helper.SetJustRead(FieldHelper::kType); |
| |
| const bool is_reflectable = |
| field_helper.position_.IsReal() && |
| !(library.is_dart_scheme() && library.IsPrivate(name)); |
| // In the VM all const fields are implicitly final whereas in Kernel they |
| // are not final because they are not explicitly declared that way. |
| const bool is_final = field_helper.IsConst() || field_helper.IsFinal(); |
| const bool is_late = field_helper.IsLate(); |
| const bool is_extension_member = field_helper.IsExtensionMember(); |
| const bool is_extension_type_member = |
| field_helper.IsExtensionTypeMember(); |
| Field& field = Field::Handle( |
| Z, Field::New(name, field_helper.IsStatic(), is_final, |
| field_helper.IsConst(), is_reflectable, is_late, |
| script_class, type, field_helper.position_, |
| field_helper.end_position_)); |
| field.set_kernel_offset(field_offset); |
| field.set_has_pragma(HasPragma::decode(pragma_bits)); |
| field.set_is_covariant(field_helper.IsCovariant()); |
| field.set_is_generic_covariant_impl( |
| field_helper.IsGenericCovariantImpl()); |
| field.set_is_extension_member(is_extension_member); |
| field.set_is_extension_type_member(is_extension_type_member); |
| field.set_is_shared(SharedPragma::decode(pragma_bits)); |
| ReadInferredType(field, field_offset + library_kernel_offset_); |
| CheckForInitializer(field); |
| // Static fields with initializers are implicitly late. |
| if (field_helper.IsStatic() && field.has_initializer()) { |
| field.set_is_late(true); |
| } |
| field_helper.ReadUntilExcluding(FieldHelper::kInitializer); |
| intptr_t field_initializer_offset = helper_.ReaderOffset(); |
| field_helper.ReadUntilExcluding(FieldHelper::kEnd); |
| |
| { |
| AlternativeReadingScope alt(&helper_.reader_, field_initializer_offset); |
| static_field_value_ = ReadInitialFieldValue(field, &field_helper); |
| } |
| GenerateFieldAccessors(klass, field, &field_helper); |
| if (field.is_static()) { |
| IG->RegisterStaticField(field, static_field_value_); |
| } |
| if ((FLAG_enable_mirrors || HasPragma::decode(pragma_bits)) && |
| annotation_count > 0) { |
| library.AddMetadata(field, field_offset); |
| } |
| fields_.Add(&field); |
| } |
| class_helper->SetJustRead(ClassHelper::kFields); |
| |
| if (klass.is_enum_class()) { |
| // Add static field 'const _deleted_enum_sentinel'. |
| // This field does not need to be of type E. |
| Field& deleted_enum_sentinel = Field::ZoneHandle(Z); |
| deleted_enum_sentinel = |
| Field::New(Symbols::_DeletedEnumSentinel(), |
| /* is_static = */ true, |
| /* is_final = */ true, |
| /* is_const = */ true, |
| /* is_reflectable = */ false, |
| /* is_late = */ false, klass, Object::dynamic_type(), |
| TokenPosition::kNoSource, TokenPosition::kNoSource); |
| IG->RegisterStaticField(deleted_enum_sentinel, Object::Handle()); |
| fields_.Add(&deleted_enum_sentinel); |
| } |
| |
| // TODO(https://dartbug.com/44454): Make VM recognize the Struct class. |
| // |
| // The FfiTrampolines currently allocate subtypes of structs and store |
| // TypedData in them, without using guards because they are force |
| // optimized. We immediately set the guarded_cid_ to kDynamicCid, which |
| // is effectively the same as calling this method first with Pointer and |
| // subsequently with TypedData with field guards. We also set |
| // guarded_list_length_ to kNoFixedLength for similar reasons. |
| if (klass.UserVisibleName() == Symbols::Compound().ptr() && |
| Library::Handle(Z, klass.library()).url() == Symbols::DartFfi().ptr()) { |
| ASSERT_EQUAL(fields_.length(), 2); |
| ASSERT(String::Handle(Z, fields_[0]->name()) |
| .StartsWith(Symbols::_typedDataBase())); |
| fields_[0]->set_guarded_cid(kDynamicCid); |
| fields_[0]->set_is_nullable(true); |
| fields_[0]->set_guarded_list_length(Field::kNoFixedLength); |
| fields_[0]->set_guarded_list_length_in_object_offset( |
| Field::kUnknownLengthOffset); |
| } |
| |
| // Check that subclasses of AbiSpecificInteger have a mapping for the |
| // current ABI. |
| // |
| // TODO(https://github.com/dart-lang/language/issues/1889): If we make |
| // kernel know about the target platform, we can move this check to the |
| // frontend. |
| const auto& super_class = Class::Handle(Z, klass.SuperClass()); |
| if (!super_class.IsNull() && |
| super_class.UserVisibleName() == Symbols::AbiSpecificInteger().ptr() && |
| Library::Handle(Z, super_class.library()).url() == |
| Symbols::DartFfi().ptr()) { |
| const char* error = nullptr; |
| compiler::ffi::NativeType::FromAbstractType( |
| Z, AbstractType::Handle(Z, klass.DeclarationType()), &error); |
| if (error != nullptr) { |
| H.ReportError("%s", error); |
| } |
| } |
| |
| // Due to ReadVMAnnotations(), the klass may have been loaded at this point |
| // (loading the class while evaluating annotations). |
| if (klass.is_loaded()) { |
| return; |
| } |
| |
| klass.SetFields(Array::Handle(Z, MakeFieldsArray())); |
| } |
| |
| class_helper->ReadUntilExcluding(ClassHelper::kConstructors); |
| int constructor_count = helper_.ReadListLength(); // read list length. |
| for (intptr_t i = 0; i < constructor_count; ++i) { |
| intptr_t constructor_offset = helper_.ReaderOffset() - correction_offset_; |
| ActiveMemberScope active_member_scope(&active_class_, nullptr); |
| ConstructorHelper constructor_helper(&helper_); |
| constructor_helper.ReadUntilExcluding(ConstructorHelper::kAnnotations); |
| const intptr_t annotation_count = helper_.ReadListLength(); |
| uint32_t pragma_bits = 0; |
| ReadVMAnnotations(annotation_count, &pragma_bits); |
| constructor_helper.SetJustRead(ConstructorHelper::kAnnotations); |
| constructor_helper.ReadUntilExcluding(ConstructorHelper::kFunction); |
| |
| const String& name = |
| H.DartConstructorName(constructor_helper.canonical_name_); |
| |
| // We can have synthetic constructors, which will not have a source uri |
| // attached to them (which means the index into the source uri table is 0, |
| // see `package:kernel/binary/ast_to_binary::writeUriReference`. |
| const Object* owner = &klass; |
| const intptr_t source_uri_index = constructor_helper.source_uri_index_; |
| if (source_uri_index != 0) { |
| owner = &ClassForScriptAt(klass, source_uri_index); |
| } |
| |
| FunctionType& signature = FunctionType::Handle(Z, FunctionType::New()); |
| const Function& function = Function::ZoneHandle( |
| Z, Function::New(signature, name, UntaggedFunction::kConstructor, |
| false, // is_static |
| constructor_helper.IsConst(), |
| false, // is_abstract |
| constructor_helper.IsExternal(), |
| false, // is_native |
| *owner, constructor_helper.start_position_)); |
| function.set_end_token_pos(constructor_helper.end_position_); |
| function.set_kernel_offset(constructor_offset); |
| signature.set_result_type(T.ReceiverType(klass)); |
| function.set_has_pragma(HasPragma::decode(pragma_bits)); |
| function.set_is_visible(!InvisibleFunctionPragma::decode(pragma_bits)); |
| function.SetIsDynamicallyOverridden( |
| DynModuleCanBeOverriddenPragma::decode(pragma_bits)); |
| |
| FunctionNodeHelper function_node_helper(&helper_); |
| function_node_helper.ReadUntilExcluding( |
| FunctionNodeHelper::kTypeParameters); |
| T.SetupFunctionParameters(klass, function, |
| true, // is_method |
| false, // is_closure |
| &function_node_helper); |
| T.SetupUnboxingInfoMetadata(function, library_kernel_offset_); |
| |
| if (library.is_dart_scheme() && |
| H.IsPrivate(constructor_helper.canonical_name_)) { |
| function.set_is_reflectable(false); |
| } |
| |
| if (constructor_helper.IsSynthetic()) { |
| function.set_is_debuggable(false); |
| } |
| |
| function_node_helper.ReadUntilExcluding(FunctionNodeHelper::kEnd); |
| constructor_helper.SetJustRead(ConstructorHelper::kFunction); |
| constructor_helper.ReadUntilExcluding(ConstructorHelper::kEnd); |
| |
| if (klass.is_finalized()) { |
| // The owner class has already been marked as finalized (e.g. class |
| // 'NativeFieldWrapperClass1'), so the signature of this added constructor |
| // must be finalized here, since finalization of member types will not be |
| // called anymore. |
| signature ^= ClassFinalizer::FinalizeType(signature); |
| function.SetSignature(signature); |
| } |
| functions_.Add(&function); |
| |
| if ((FLAG_enable_mirrors || HasPragma::decode(pragma_bits)) && |
| annotation_count > 0) { |
| library.AddMetadata(function, constructor_offset); |
| } |
| } |
| |
| // Due to ReadVMAnnotations(), the klass may have been loaded at this point |
| // (loading the class while evaluating annotations). |
| if (klass.is_loaded()) { |
| return; |
| } |
| |
| // Everything up til the procedures are skipped implicitly, and class_helper |
| // is no longer used. |
| |
| intptr_t procedure_count = class_index.procedure_count(); |
| // Procedure offsets within a class index are whole program offsets and not |
| // relative to the library of the class. Hence, we need a correction to get |
| // the currect procedure offset within the current data. |
| intptr_t correction = correction_offset_ - library_kernel_offset_; |
| intptr_t next_procedure_offset = class_index.ProcedureOffset(0) + correction; |
| for (intptr_t i = 0; i < procedure_count; ++i) { |
| helper_.SetOffset(next_procedure_offset); |
| next_procedure_offset = class_index.ProcedureOffset(i + 1) + correction; |
| LoadProcedure(library, klass, true, next_procedure_offset); |
| // LoadProcedure calls Library::GetMetadata which invokes Dart code |
| // which may recursively trigger class finalization and FinishClassLoading. |
| // In such case, return immediately and avoid overwriting already finalized |
| // functions with freshly loaded and not yet finalized. |
| if (klass.is_loaded()) { |
| return; |
| } |
| } |
| |
| klass.SetFunctions(Array::Handle(MakeFunctionsArray())); |
| |
| ASSERT(!klass.is_loaded()); |
| klass.set_is_loaded(true); |
| } |
| |
| void KernelLoader::FinishLoading(const Class& klass) { |
| ASSERT(klass.IsTopLevel() || (klass.kernel_offset() > 0)); |
| |
| Zone* zone = Thread::Current()->zone(); |
| const Library& library = Library::Handle(zone, klass.library()); |
| const Class& toplevel_class = Class::Handle(zone, library.toplevel_class()); |
| const auto& library_kernel_data = |
| TypedDataView::Handle(zone, library.KernelLibrary()); |
| ASSERT(!library_kernel_data.IsNull()); |
| |
| const auto& kernel_info = |
| KernelProgramInfo::Handle(zone, klass.KernelProgramInfo()); |
| const intptr_t library_kernel_offset = |
| kernel_info.KernelLibraryStartOffset(library.kernel_library_index()); |
| |
| KernelLoader kernel_loader(kernel_info, library_kernel_data, |
| library_kernel_offset); |
| |
| LibraryIndex library_index(library_kernel_data); |
| |
| if (klass.IsTopLevel()) { |
| ASSERT(klass.ptr() == toplevel_class.ptr()); |
| kernel_loader.FinishTopLevelClassLoading(klass, library, library_index); |
| return; |
| } |
| |
| const intptr_t class_offset = klass.kernel_offset(); |
| ClassIndex class_index( |
| library_kernel_data, class_offset, |
| // Class offsets in library index are whole program offsets. |
| // Hence, we need to add |library_kernel_offset| to |
| // |class_offset| to lookup the entry for the class in the library |
| // index. |
| library_index.SizeOfClassAtOffset(class_offset + library_kernel_offset)); |
| |
| kernel_loader.helper_.SetOffset(class_offset); |
| ClassHelper class_helper(&kernel_loader.helper_); |
| |
| kernel_loader.FinishClassLoading(klass, library, toplevel_class, class_offset, |
| class_index, &class_helper); |
| } |
| |
| // Read annotations on a procedure or a class to identify potential VM-specific |
| // directives. |
| // |
| // Output parameters: |
| // |
| // `native_name`: the native name if @pragma('vm:external-name)` was found. |
| // |
| // `pragma_bits`: any recognized pragma that was found |
| // |
| void KernelLoader::ReadVMAnnotations(intptr_t annotation_count, |
| uint32_t* pragma_bits, |
| String* native_name) { |
| *pragma_bits = 0; |
| if (annotation_count == 0) { |
| return; |
| } |
| |
| for (intptr_t i = 0; i < annotation_count; ++i) { |
| const intptr_t tag = helper_.PeekTag(); |
| if (tag == kConstantExpression || tag == kFileUriConstantExpression) { |
| helper_.ReadByte(); // Skip the tag. |
| helper_.ReadPosition(); // Skip fileOffset. |
| if (tag == kFileUriConstantExpression) { |
| helper_.ReadUInt(); // Skip uri. |
| } |
| helper_.SkipDartType(); // Skip type. |
| const intptr_t index_in_constant_table = helper_.ReadUInt(); |
| |
| // Prepare lazy constant reading. |
| ConstantReader constant_reader(&helper_, &active_class_); |
| |
| intptr_t name_index = -1; |
| intptr_t options_index = -1; |
| if (constant_reader.IsPragmaInstanceConstant( |
| index_in_constant_table, &name_index, &options_index)) { |
| *pragma_bits = HasPragma::update(true, *pragma_bits); |
| |
| if (constant_reader.IsStringConstant(name_index, "vm:invisible")) { |
| *pragma_bits = InvisibleFunctionPragma::update(true, *pragma_bits); |
| } |
| if (constant_reader.IsStringConstant(name_index, "vm:external-name")) { |
| *pragma_bits = ExternalNamePragma::update(true, *pragma_bits); |
| constant_reader.GetStringConstant(options_index, native_name); |
| } |
| if (constant_reader.IsStringConstant(name_index, |
| "vm:isolate-unsendable")) { |
| *pragma_bits = IsolateUnsendablePragma::update(true, *pragma_bits); |
| } |
| if (constant_reader.IsStringConstant(name_index, |
| "vm:deeply-immutable")) { |
| *pragma_bits = DeeplyImmutablePragma::update(true, *pragma_bits); |
| } |
| if (constant_reader.IsStringConstant(name_index, "vm:ffi:native")) { |
| *pragma_bits = FfiNativePragma::update(true, *pragma_bits); |
| } |
| if (constant_reader.IsStringConstant(name_index, "vm:shared")) { |
| if (!is_experimental_shared_data_enabled) { |
| FATAL( |
| "Encountered vm:shared when functionality is disabled. " |
| "Pass --experimental-shared-data"); |
| } |
| *pragma_bits = SharedPragma::update(true, *pragma_bits); |
| } |
| if (constant_reader.IsStringConstant(name_index, |
| "dyn-module:extendable")) { |
| *pragma_bits = DynModuleExtendablePragma::update(true, *pragma_bits); |
| } |
| if (constant_reader.IsStringConstant(name_index, |
| "dyn-module:can-be-overridden")) { |
| *pragma_bits = |
| DynModuleCanBeOverriddenPragma::update(true, *pragma_bits); |
| } |
| } |
| } else { |
| helper_.SkipExpression(); |
| continue; |
| } |
| } |
| } |
| |
| void KernelLoader::LoadProcedure(const Library& library, |
| const Class& owner, |
| bool in_class, |
| intptr_t procedure_end) { |
| intptr_t procedure_offset = helper_.ReaderOffset() - correction_offset_; |
| ProcedureHelper procedure_helper(&helper_); |
| |
| procedure_helper.ReadUntilExcluding(ProcedureHelper::kAnnotations); |
| // CFE adds 'member signature' abstract functions to a legacy class deriving |
| // or implementing an opted-in interface. The signature of these functions is |
| // legacy erased and used as the target of interface calls. They are used for |
| // static reasoning about the program by CFE, but not really needed by the VM. |
| // In certain situations (e.g. issue 162073826), a large number of these |
| // additional functions can cause strain on the VM. They are therefore skipped |
| // in jit mode and their associated origin function is used instead as |
| // interface call target. |
| if (!FLAG_precompiled_mode && procedure_helper.IsMemberSignature()) { |
| helper_.SetOffset(procedure_end); |
| return; |
| } |
| const String& name = H.DartProcedureName(procedure_helper.canonical_name_); |
| bool is_method = in_class && !procedure_helper.IsStatic(); |
| bool is_abstract = procedure_helper.IsAbstract(); |
| bool is_external = procedure_helper.IsExternal(); |
| bool is_extension_member = procedure_helper.IsExtensionMember(); |
| bool is_extension_type_member = procedure_helper.IsExtensionTypeMember(); |
| bool is_synthetic = procedure_helper.IsSynthetic(); |
| String& native_name = String::Handle(Z); |
| uint32_t pragma_bits = 0; |
| const intptr_t annotation_count = helper_.ReadListLength(); |
| ReadVMAnnotations(annotation_count, &pragma_bits, &native_name); |
| is_external = is_external && native_name.IsNull(); |
| procedure_helper.SetJustRead(ProcedureHelper::kAnnotations); |
| const Object& script_class = |
| ClassForScriptAt(owner, procedure_helper.source_uri_index_); |
| UntaggedFunction::Kind kind = GetFunctionType(procedure_helper.kind_); |
| |
| // We do not register expression evaluation libraries with the VM: |
| // The expression evaluation functions should be GC-able as soon as |
| // they are not reachable anymore and we never look them up by name. |
| const bool register_function = !name.Equals(Symbols::DebugProcedureName()); |
| |
| const bool is_ffi_native = FfiNativePragma::decode(pragma_bits); |
| const FunctionType& signature = FunctionType::Handle(Z, FunctionType::New()); |
| const Function& function = Function::ZoneHandle( |
| Z, Function::New(signature, name, kind, |
| !is_method, // is_static |
| false, // is_const |
| is_abstract, is_external, |
| !native_name.IsNull() || is_ffi_native, // is_native |
| script_class, procedure_helper.start_position_)); |
| function.set_has_pragma(HasPragma::decode(pragma_bits)); |
| function.set_end_token_pos(procedure_helper.end_position_); |
| function.set_is_synthetic(procedure_helper.IsNoSuchMethodForwarder() || |
| procedure_helper.IsMemberSignature() || |
| is_synthetic); |
| function.set_is_visible(!InvisibleFunctionPragma::decode(pragma_bits)); |
| function.SetIsDynamicallyOverridden( |
| DynModuleCanBeOverriddenPragma::decode(pragma_bits)); |
| if (register_function) { |
| functions_.Add(&function); |
| } else { |
| H.SetExpressionEvaluationFunction(function); |
| } |
| function.set_kernel_offset(procedure_offset); |
| function.set_is_extension_member(is_extension_member); |
| function.set_is_extension_type_member(is_extension_type_member); |
| if ((library.is_dart_scheme() && |
| H.IsPrivate(procedure_helper.canonical_name_)) || |
| (function.is_static() && (library.ptr() == Library::InternalLibrary()))) { |
| function.set_is_reflectable(false); |
| } |
| if (procedure_helper.IsMemberSignature()) { |
| function.set_is_reflectable(false); |
| } |
| |
| ActiveMemberScope active_member(&active_class_, &function); |
| |
| procedure_helper.ReadUntilExcluding(ProcedureHelper::kFunction); |
| |
| FunctionNodeHelper function_node_helper(&helper_); |
| function_node_helper.ReadUntilIncluding(FunctionNodeHelper::kDartAsyncMarker); |
| if (function_node_helper.async_marker_ == FunctionNodeHelper::kAsync) { |
| function.set_modifier(UntaggedFunction::kAsync); |
| function.set_is_inlinable(false); |
| ASSERT(function.IsAsyncFunction()); |
| } else if (function_node_helper.async_marker_ == |
| FunctionNodeHelper::kAsyncStar) { |
| function.set_modifier(UntaggedFunction::kAsyncGen); |
| function.set_is_inlinable(false); |
| ASSERT(function.IsAsyncGenerator()); |
| } else if (function_node_helper.async_marker_ == |
| FunctionNodeHelper::kSyncStar) { |
| function.set_modifier(UntaggedFunction::kSyncGen); |
| function.set_is_inlinable(false); |
| ASSERT(function.IsSyncGenerator()); |
| } else { |
| ASSERT(function_node_helper.async_marker_ == FunctionNodeHelper::kSync); |
| ASSERT(!function.IsAsyncFunction()); |
| ASSERT(!function.IsAsyncGenerator()); |
| ASSERT(!function.IsSyncGenerator()); |
| } |
| |
| if (!native_name.IsNull()) { |
| function.set_native_name(native_name); |
| } |
| |
| function_node_helper.ReadUntilExcluding(FunctionNodeHelper::kTypeParameters); |
| T.SetupFunctionParameters(owner, function, is_method, |
| false, // is_closure |
| &function_node_helper); |
| T.SetupUnboxingInfoMetadata(function, library_kernel_offset_); |
| |
| function_node_helper.ReadUntilExcluding( |
| FunctionNodeHelper::kRedirectingFactoryTarget); |
| function.set_is_redirecting_factory(helper_.ReadTag() == kSomething); |
| |
| // Everything else is skipped implicitly, and procedure_helper and |
| // function_node_helper are no longer used. |
| helper_.SetOffset(procedure_end); |
| |
| if (annotation_count > 0) { |
| library.AddMetadata(function, procedure_offset); |
| } |
| } |
| |
| const Object& KernelLoader::ClassForScriptAt(const Class& klass, |
| intptr_t source_uri_index) { |
| const Script& correct_script = Script::Handle(Z, ScriptAt(source_uri_index)); |
| if (klass.script() != correct_script.ptr()) { |
| // Lazily create the [patch_classes_] array in case we need it. |
| if (patch_classes_.IsNull()) { |
| const Array& scripts = Array::Handle(Z, kernel_program_info_.scripts()); |
| ASSERT(!scripts.IsNull()); |
| patch_classes_ = Array::New(scripts.Length(), Heap::kOld); |
| } |
| |
| // Use cache for patch classes. This works best for in-order usages. |
| PatchClass& patch_class = PatchClass::Handle(Z); |
| patch_class ^= patch_classes_.At(source_uri_index); |
| if (patch_class.IsNull() || patch_class.wrapped_class() != klass.ptr()) { |
| const auto& lib = Library::Handle(klass.library()); |
| patch_class = |
| PatchClass::New(klass, kernel_program_info_, correct_script); |
| patch_class.set_kernel_library_index(lib.kernel_library_index()); |
| patch_classes_.SetAt(source_uri_index, patch_class); |
| } |
| return patch_class; |
| } |
| return klass; |
| } |
| |
| ScriptPtr KernelLoader::LoadScriptAt(intptr_t index, |
| UriToSourceTable* uri_to_source_table) { |
| const String& uri_string = helper_.SourceTableUriFor(index); |
| const String& import_uri_string = helper_.SourceTableImportUriFor(index); |
| auto& constant_coverage = TypedDataView::Handle(Z); |
| NOT_IN_PRODUCT(constant_coverage = helper_.GetConstantCoverageFor(index)); |
| |
| String& sources = String::Handle(Z); |
| TypedData& line_starts = TypedData::Handle(Z); |
| |
| if (uri_to_source_table != nullptr) { |
| UriToSourceTableEntry wrapper; |
| wrapper.uri = &uri_string; |
| UriToSourceTableEntry* pair = uri_to_source_table->LookupValue(&wrapper); |
| if (pair != nullptr) { |
| sources = pair->sources->ptr(); |
| line_starts = pair->line_starts->ptr(); |
| } |
| } |
| |
| if (sources.IsNull() || line_starts.IsNull()) { |
| const String& script_source = helper_.GetSourceFor(index); |
| line_starts = helper_.GetLineStartsFor(index); |
| |
| if (script_source.ptr() == Symbols::Empty().ptr() && |
| line_starts.Length() == 0 && uri_string.Length() > 0) { |
| // Entry included only to provide URI - actual source should already exist |
| // in the VM, so try to find it. |
| Library& lib = Library::Handle(Z); |
| Script& script = Script::Handle(Z); |
| const GrowableObjectArray& libs = |
| GrowableObjectArray::Handle(IG->object_store()->libraries()); |
| for (intptr_t i = 0; i < libs.Length(); i++) { |
| lib ^= libs.At(i); |
| script = lib.LookupScript(uri_string, /* useResolvedUri = */ true); |
| if (!script.IsNull()) { |
| sources = script.Source(); |
| line_starts = script.line_starts(); |
| break; |
| } |
| } |
| } else { |
| sources = script_source.ptr(); |
| } |
| } |
| |
| const Script& script = |
| Script::Handle(Z, Script::New(import_uri_string, uri_string, sources)); |
| script.InitializeFromKernel(kernel_program_info_, index, line_starts, |
| constant_coverage); |
| return script.ptr(); |
| } |
| |
| ObjectPtr KernelLoader::ReadInitialFieldValue(const Field& field, |
| FieldHelper* field_helper) { |
| const Tag tag = helper_.PeekTag(); |
| const bool has_initializer = (tag == kSomething); |
| |
| if (has_initializer) { |
| SimpleExpressionConverter converter(&H, &helper_); |
| const bool has_simple_initializer = |
| converter.IsSimple(helper_.ReaderOffset() + 1); // ignore the tag. |
| if (has_simple_initializer) { |
| if (field_helper->IsStatic()) { |
| return converter.SimpleValue().ptr(); |
| } else { |
| field.RecordStore(converter.SimpleValue()); |
| } |
| } |
| } |
| |
| if (field_helper->IsStatic()) { |
| if (!has_initializer && !field_helper->IsLate()) { |
| // Static fields without an initializer are implicitly initialized to |
| // null. |
| return Instance::null(); |
| } |
| } |
| ASSERT(field.NeedsGetter()); |
| |
| // If static, we do need a getter that evaluates the initializer if necessary. |
| return field_helper->IsStatic() ? Object::sentinel().ptr() : Object::null(); |
| } |
| |
| void KernelLoader::GenerateFieldAccessors(const Class& klass, |
| const Field& field, |
| FieldHelper* field_helper) { |
| const bool needs_getter = field.NeedsGetter(); |
| const bool needs_setter = field.NeedsSetter(); |
| |
| if (!needs_getter && !needs_setter) { |
| return; |
| } |
| |
| const Object& script_class = |
| ClassForScriptAt(klass, field_helper->source_uri_index_); |
| const AbstractType& field_type = AbstractType::Handle(Z, field.type()); |
| |
| if (needs_getter) { |
| const String& getter_name = |
| H.DartGetterName(field_helper->canonical_name_getter_); |
| const FunctionType& signature = |
| FunctionType::Handle(Z, FunctionType::New()); |
| Function& getter = Function::ZoneHandle( |
| Z, |
| Function::New( |
| signature, getter_name, |
| field_helper->IsStatic() ? UntaggedFunction::kImplicitStaticGetter |
| : UntaggedFunction::kImplicitGetter, |
| field_helper->IsStatic(), |
| // The functions created by the parser have is_const for static |
| // fields that are const (not just final) and they have is_const |
| // for non-static fields that are final. |
| field_helper->IsStatic() ? field_helper->IsConst() |
| : field_helper->IsFinal(), |
| false, // is_abstract |
| false, // is_external |
| false, // is_native |
| script_class, field_helper->position_)); |
| functions_.Add(&getter); |
| getter.set_end_token_pos(field_helper->end_position_); |
| getter.set_kernel_offset(field.kernel_offset()); |
| signature.set_result_type(field_type); |
| getter.set_is_debuggable(false); |
| getter.set_accessor_field(field); |
| getter.set_is_extension_member(field.is_extension_member()); |
| getter.set_is_extension_type_member(field.is_extension_type_member()); |
| H.SetupFieldAccessorFunction(klass, getter, field_type); |
| T.SetupUnboxingInfoMetadataForFieldAccessors(getter, |
| library_kernel_offset_); |
| } |
| |
| if (needs_setter) { |
| // Only static fields can be const. |
| ASSERT(!field_helper->IsConst()); |
| const String& setter_name = |
| H.DartSetterName(field_helper->canonical_name_setter_); |
| const FunctionType& signature = |
| FunctionType::Handle(Z, FunctionType::New()); |
| Function& setter = Function::ZoneHandle( |
| Z, |
| Function::New(signature, setter_name, UntaggedFunction::kImplicitSetter, |
| field_helper->IsStatic(), |
| false, // is_const |
| false, // is_abstract |
| false, // is_external |
| false, // is_native |
| script_class, field_helper->position_)); |
| functions_.Add(&setter); |
| setter.set_end_token_pos(field_helper->end_position_); |
| setter.set_kernel_offset(field.kernel_offset()); |
| signature.set_result_type(Object::void_type()); |
| setter.set_is_debuggable(false); |
| setter.set_accessor_field(field); |
| setter.set_is_extension_member(field.is_extension_member()); |
| setter.set_is_extension_type_member(field.is_extension_type_member()); |
| H.SetupFieldAccessorFunction(klass, setter, field_type); |
| T.SetupUnboxingInfoMetadataForFieldAccessors(setter, |
| library_kernel_offset_); |
| } |
| } |
| |
| LibraryPtr KernelLoader::LookupLibraryOrNull(NameIndex library) { |
| LibraryPtr result; |
| name_index_handle_ = Smi::New(library); |
| { |
| result = kernel_program_info_.LookupLibrary(thread_, name_index_handle_); |
| NoSafepointScope no_safepoint_scope(thread_); |
| if (result != Library::null()) { |
| return result; |
| } |
| } |
| const String& url = H.DartString(H.CanonicalNameString(library)); |
| { |
| result = Library::LookupLibrary(thread_, url); |
| NoSafepointScope no_safepoint_scope(thread_); |
| if (result == Library::null()) { |
| return result; |
| } |
| } |
| const Library& handle = Library::Handle(Z, result); |
| name_index_handle_ = Smi::New(library); |
| return kernel_program_info_.InsertLibrary(thread_, name_index_handle_, |
| handle); |
| } |
| |
| LibraryPtr KernelLoader::LookupLibrary(NameIndex library) { |
| name_index_handle_ = Smi::New(library); |
| { |
| LibraryPtr result = |
| kernel_program_info_.LookupLibrary(thread_, name_index_handle_); |
| NoSafepointScope no_safepoint_scope(thread_); |
| if (result != Library::null()) { |
| return result; |
| } |
| } |
| |
| Library& handle = Library::Handle(Z); |
| const String& url = H.DartSymbolPlain(H.CanonicalNameString(library)); |
| // We do not register expression evaluation libraries with the VM: |
| // The expression evaluation functions should be GC-able as soon as |
| // they are not reachable anymore and we never look them up by name. |
| if (url.Equals(Symbols::EvalSourceUri())) { |
| if (expression_evaluation_library_.IsNull()) { |
| handle = Library::New(url); |
| expression_evaluation_library_ = handle.ptr(); |
| } |
| return expression_evaluation_library_.ptr(); |
| } |
| handle = Library::LookupLibrary(thread_, url); |
| if (handle.IsNull()) { |
| handle = Library::New(url); |
| handle.Register(thread_); |
| } |
| ASSERT(!handle.IsNull()); |
| name_index_handle_ = Smi::New(library); |
| return kernel_program_info_.InsertLibrary(thread_, name_index_handle_, |
| handle); |
| } |
| |
| LibraryPtr KernelLoader::LookupLibraryFromClass(NameIndex klass) { |
| return LookupLibrary(H.CanonicalNameParent(klass)); |
| } |
| |
| ClassPtr KernelLoader::LookupClass(const Library& library, NameIndex klass) { |
| name_index_handle_ = Smi::New(klass); |
| { |
| ClassPtr raw_class = |
| kernel_program_info_.LookupClass(thread_, name_index_handle_); |
| NoSafepointScope no_safepoint_scope(thread_); |
| if (raw_class != Class::null()) { |
| return raw_class; |
| } |
| } |
| |
| ASSERT(!library.IsNull()); |
| const String& name = H.DartClassName(klass); |
| Class& handle = Class::Handle(Z, library.LookupClass(name)); |
| bool register_class = true; |
| if (handle.IsNull()) { |
| // We do not register expression evaluation classes with the VM: |
| // The expression evaluation functions should be GC-able as soon as |
| // they are not reachable anymore and we never look them up by name. |
| register_class = library.ptr() != expression_evaluation_library_.ptr(); |
| |
| handle = Class::New(library, name, Script::Handle(Z), |
| TokenPosition::kNoSource, register_class); |
| if (register_class) { |
| library.AddClass(handle); |
| } |
| } |
| ASSERT(!handle.IsNull()); |
| if (register_class) { |
| name_index_handle_ = Smi::New(klass); |
| kernel_program_info_.InsertClass(thread_, name_index_handle_, handle); |
| } |
| return handle.ptr(); |
| } |
| |
| UntaggedFunction::Kind KernelLoader::GetFunctionType( |
| ProcedureHelper::Kind procedure_kind) { |
| intptr_t lookuptable[] = { |
| UntaggedFunction::kRegularFunction, // Procedure::kMethod |
| UntaggedFunction::kGetterFunction, // Procedure::kGetter |
| UntaggedFunction::kSetterFunction, // Procedure::kSetter |
| UntaggedFunction::kRegularFunction, // Procedure::kOperator |
| UntaggedFunction::kConstructor, // Procedure::kFactory |
| }; |
| intptr_t kind = static_cast<int>(procedure_kind); |
| ASSERT(0 <= kind && kind <= ProcedureHelper::kFactory); |
| return static_cast<UntaggedFunction::Kind>(lookuptable[kind]); |
| } |
| |
| FunctionPtr KernelLoader::LoadClosureFunction(const Function& parent_function, |
| const Object& closure_owner) { |
| const intptr_t func_decl_offset = helper_.ReaderOffset(); |
| const Tag tag = helper_.ReadTag(); |
| ASSERT((tag == kFunctionExpression) || (tag == kFunctionDeclaration)); |
| const bool is_declaration = (tag == kFunctionDeclaration); |
| |
| TokenPosition position = helper_.ReadPosition(); // read position. |
| |
| uint32_t pragma_bits = 0; |
| intptr_t annotation_count = 0; |
| const String* name; |
| if (is_declaration) { |
| // Read variable declaration. |
| VariableDeclarationHelper variable_helper(&helper_); |
| |
| variable_helper.ReadUntilExcluding(VariableDeclarationHelper::kAnnotations); |
| const intptr_t annotation_count = helper_.ReadListLength(); |
| ReadVMAnnotations(annotation_count, &pragma_bits); |
| variable_helper.SetJustRead(VariableDeclarationHelper::kAnnotations); |
| |
| variable_helper.ReadUntilExcluding(VariableDeclarationHelper::kEnd); |
| name = &H.DartSymbolObfuscate(variable_helper.name_index_); |
| } else { |
| name = &Symbols::AnonymousClosure(); |
| } |
| |
| const intptr_t func_node_offset = helper_.ReaderOffset(); |
| |
| FunctionNodeHelper function_node_helper(&helper_); |
| function_node_helper.ReadUntilExcluding(FunctionNodeHelper::kTypeParameters); |
| |
| Function& function = Function::Handle(Z); |
| if (!closure_owner.IsNull()) { |
| function = Function::NewClosureFunctionWithKind( |
| UntaggedFunction::kClosureFunction, *name, parent_function, |
| parent_function.is_static(), position, closure_owner); |
| } else { |
| function = Function::NewClosureFunction(*name, parent_function, position); |
| } |
| |
| const bool has_pragma = HasPragma::decode(pragma_bits); |
| function.set_has_pragma(has_pragma); |
| function.set_is_visible(!InvisibleFunctionPragma::decode(pragma_bits)); |
| if ((FLAG_enable_mirrors && (annotation_count > 0)) || has_pragma) { |
| const auto& lib = |
| Library::Handle(Z, Class::Handle(Z, function.Owner()).library()); |
| lib.AddMetadata(function, func_decl_offset); |
| } |
| |
| if (function_node_helper.async_marker_ == FunctionNodeHelper::kAsync) { |
| function.set_modifier(UntaggedFunction::kAsync); |
| function.set_is_inlinable(false); |
| ASSERT(function.IsAsyncFunction()); |
| } else if (function_node_helper.async_marker_ == |
| FunctionNodeHelper::kAsyncStar) { |
| function.set_modifier(UntaggedFunction::kAsyncGen); |
| function.set_is_inlinable(false); |
| ASSERT(function.IsAsyncGenerator()); |
| } else if (function_node_helper.async_marker_ == |
| FunctionNodeHelper::kSyncStar) { |
| function.set_modifier(UntaggedFunction::kSyncGen); |
| function.set_is_inlinable(false); |
| ASSERT(function.IsSyncGenerator()); |
| } else { |
| ASSERT(function_node_helper.async_marker_ == FunctionNodeHelper::kSync); |
| ASSERT(!function.IsAsyncFunction()); |
| ASSERT(!function.IsAsyncGenerator()); |
| ASSERT(!function.IsSyncGenerator()); |
| } |
| |
| // If the start token position is synthetic, the end token position |
| // should be as well. |
| function.set_end_token_pos( |
| position.IsReal() ? function_node_helper.end_position_ : position); |
| |
| function.set_kernel_offset(func_node_offset); |
| T.SetupFunctionParameters(Class::Handle(Z), function, |
| false, // is_method |
| true, // is_closure |
| &function_node_helper); |
| // type_translator->SetupUnboxingInfoMetadata is not called here at the |
| // moment because closures do not have unboxed parameters and return |
| // value |
| |
| // Finalize function type. |
| FunctionType& signature = FunctionType::Handle(Z, function.signature()); |
| signature ^= ClassFinalizer::FinalizeType(signature); |
| function.SetSignature(signature); |
| |
| ClosureFunctionsCache::AddClosureFunctionLocked(function); |
| |
| return function.ptr(); |
| } |
| |
| FunctionPtr KernelLoader::GetClosureFunction(Thread* thread, |
| intptr_t func_decl_offset, |
| const Function& member_function, |
| const Function& parent_function, |
| const Object& closure_owner) { |
| Zone* zone = thread->zone(); |
| Function& function = Function::Handle(zone); |
| intptr_t func_node_offset = -1; |
| |
| const auto& kernel_info = |
| KernelProgramInfo::Handle(zone, member_function.KernelProgramInfo()); |
| const auto& library_kernel_data = |
| TypedDataView::Handle(zone, member_function.KernelLibrary()); |
| ASSERT(!library_kernel_data.IsNull()); |
| const intptr_t library_kernel_offset = member_function.KernelLibraryOffset(); |
| |
| KernelLoader kernel_loader(kernel_info, library_kernel_data, |
| library_kernel_offset); |
| { |
| // TODO(alexmarkov): Use func_decl_offset as a key in ClosureFunctionsCache |
| // instead of func_node_offset and avoid this reading. |
| kernel_loader.helper_.SetOffset(func_decl_offset); |
| kernel_loader.helper_.ReadUntilFunctionNode(); |
| func_node_offset = kernel_loader.helper_.ReaderOffset(); |
| |
| { |
| SafepointReadRwLocker ml(thread, thread->isolate_group()->program_lock()); |
| function = ClosureFunctionsCache::LookupClosureFunctionLocked( |
| member_function, func_node_offset); |
| if (!function.IsNull()) { |
| return function.ptr(); |
| } |
| } |
| } |
| |
| SafepointWriteRwLocker ml(thread, thread->isolate_group()->program_lock()); |
| function = ClosureFunctionsCache::LookupClosureFunctionLocked( |
| member_function, func_node_offset); |
| if (function.IsNull()) { |
| ActiveClassScope active_class_scope( |
| &kernel_loader.active_class_, |
| &Class::Handle(zone, member_function.Owner())); |
| ActiveMemberScope active_member(&kernel_loader.active_class_, |
| &member_function); |
| ActiveTypeParametersScope active_type_params( |
| &kernel_loader.active_class_, member_function, |
| &FunctionType::Handle(zone, parent_function.signature()), zone); |
| kernel_loader.helper_.SetOffset(func_decl_offset); |
| function = |
| kernel_loader.LoadClosureFunction(parent_function, closure_owner); |
| } |
| return function.ptr(); |
| } |
| |
| } // namespace kernel |
| } // namespace dart |
| #endif // !defined(DART_PRECOMPILED_RUNTIME) |