Alexander Markov
5129cff930
While deserializing AOT snapshot, Code objects which do not contain valuable information besides entry point and stack maps are discarded and not allocated on the heap (they are replaced with StubCode::UnknownDartCode()). PC -> Code/CompressedStackMaps lookup is implemented using a separate table (InstructionsTable). Flutter gallery in release-sizeopt mode: Heap size of snapshot objects: arm -26.89%, arm64 -27.68% Large Flutter application in release mode with --dwarf-stack-traces: Heap size of snapshot objects: -24.3%. Discarded Code objects: 72.5% of all Code objects. Issue: https://github.com/dart-lang/sdk/issues/44852. TEST=existing tests; "--dwarf_stack_traces --no-retain_function_objects --no-retain_code_objects" mode is enabled for a few tests. Change-Id: I5fe3e283630c8e8f4442319d5dcae38d174dd0d8 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/189560 Commit-Queue: Alexander Markov <alexmarkov@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com>
255 lines
17 KiB
C++
255 lines
17 KiB
C++
// Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/raw_object_fields.h"
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namespace dart {
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#if defined(DART_PRECOMPILER) || !defined(DART_PRODUCT)
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#define COMMON_CLASSES_AND_FIELDS(F) \
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F(Class, name_) \
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F(Class, user_name_) \
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F(Class, functions_) \
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F(Class, functions_hash_table_) \
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F(Class, fields_) \
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F(Class, offset_in_words_to_field_) \
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F(Class, interfaces_) \
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F(Class, script_) \
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F(Class, library_) \
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F(Class, type_parameters_) \
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F(Class, super_type_) \
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F(Class, constants_) \
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F(Class, declaration_type_) \
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F(Class, invocation_dispatcher_cache_) \
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F(Class, allocation_stub_) \
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F(Class, direct_implementors_) \
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F(Class, direct_subclasses_) \
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F(Class, dependent_code_) \
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F(PatchClass, patched_class_) \
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F(PatchClass, origin_class_) \
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F(PatchClass, script_) \
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F(PatchClass, library_kernel_data_) \
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F(Function, name_) \
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F(Function, owner_) \
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F(Function, data_) \
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F(Function, ic_data_array_) \
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F(Function, code_) \
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F(ClosureData, context_scope_) \
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F(ClosureData, parent_function_) \
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F(ClosureData, closure_) \
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F(Field, name_) \
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F(Field, owner_) \
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F(Field, type_) \
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F(Field, guarded_list_length_) \
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F(Field, dependent_code_) \
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F(Field, initializer_function_) \
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F(Field, host_offset_or_field_id_) \
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F(Script, url_) \
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F(Script, resolved_url_) \
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F(Script, compile_time_constants_) \
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F(Script, line_starts_) \
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F(Script, debug_positions_) \
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F(Script, kernel_program_info_) \
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F(Script, source_) \
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F(Library, name_) \
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F(Library, url_) \
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F(Library, private_key_) \
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F(Library, dictionary_) \
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F(Library, metadata_) \
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F(Library, toplevel_class_) \
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F(Library, used_scripts_) \
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F(Library, loading_unit_) \
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F(Library, imports_) \
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F(Library, exports_) \
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F(Library, kernel_data_) \
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F(Library, resolved_names_) \
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F(Library, exported_names_) \
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F(Library, loaded_scripts_) \
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F(Namespace, target_) \
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F(Namespace, show_names_) \
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F(Namespace, hide_names_) \
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F(Namespace, owner_) \
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F(KernelProgramInfo, string_offsets_) \
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F(KernelProgramInfo, string_data_) \
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F(KernelProgramInfo, canonical_names_) \
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F(KernelProgramInfo, metadata_payloads_) \
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F(KernelProgramInfo, metadata_mappings_) \
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F(KernelProgramInfo, scripts_) \
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F(KernelProgramInfo, constants_) \
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F(KernelProgramInfo, potential_natives_) \
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F(KernelProgramInfo, potential_pragma_functions_) \
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F(KernelProgramInfo, constants_table_) \
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F(KernelProgramInfo, libraries_cache_) \
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F(KernelProgramInfo, classes_cache_) \
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F(KernelProgramInfo, retained_kernel_blob_) \
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F(WeakSerializationReference, target_) \
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F(WeakSerializationReference, replacement_) \
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F(Code, object_pool_) \
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F(Code, instructions_) \
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F(Code, owner_) \
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F(Code, exception_handlers_) \
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F(Code, pc_descriptors_) \
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F(Code, catch_entry_) \
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F(Code, compressed_stackmaps_) \
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F(Code, inlined_id_to_function_) \
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F(Code, code_source_map_) \
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F(ExceptionHandlers, handled_types_data_) \
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F(Context, parent_) \
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F(SingleTargetCache, target_) \
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F(UnlinkedCall, target_name_) \
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F(UnlinkedCall, args_descriptor_) \
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F(MonomorphicSmiableCall, expected_cid_) \
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F(MonomorphicSmiableCall, target_) \
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F(CallSiteData, target_name_) \
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F(CallSiteData, args_descriptor_) \
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F(ICData, entries_) \
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F(ICData, owner_) \
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F(InstructionsTable, descriptors_) \
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F(MegamorphicCache, buckets_) \
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F(MegamorphicCache, mask_) \
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F(SubtypeTestCache, cache_) \
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F(LoadingUnit, parent_) \
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F(LoadingUnit, base_objects_) \
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F(ApiError, message_) \
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F(LanguageError, previous_error_) \
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F(LanguageError, script_) \
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F(LanguageError, message_) \
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F(LanguageError, formatted_message_) \
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F(UnhandledException, exception_) \
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F(UnhandledException, stacktrace_) \
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F(UnwindError, message_) \
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F(LibraryPrefix, name_) \
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F(LibraryPrefix, importer_) \
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F(LibraryPrefix, imports_) \
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F(TypeArguments, instantiations_) \
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F(TypeArguments, length_) \
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F(TypeArguments, hash_) \
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F(TypeArguments, nullability_) \
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F(AbstractType, type_test_stub_) \
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F(Type, type_test_stub_) \
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F(Type, type_class_id_) \
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F(Type, arguments_) \
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F(Type, hash_) \
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F(FunctionType, type_test_stub_) \
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F(FunctionType, hash_) \
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F(FunctionType, result_type_) \
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F(FunctionType, parameter_types_) \
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F(FunctionType, parameter_names_) \
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F(FunctionType, type_parameters_) \
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F(TypeRef, type_test_stub_) \
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F(TypeRef, type_) \
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F(TypeParameter, type_test_stub_) \
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F(TypeParameter, name_) \
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F(TypeParameter, hash_) \
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F(TypeParameter, bound_) \
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F(Closure, instantiator_type_arguments_) \
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F(Closure, function_type_arguments_) \
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F(Closure, delayed_type_arguments_) \
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F(Closure, function_) \
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F(Closure, context_) \
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F(Closure, hash_) \
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F(String, length_) \
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F(Array, type_arguments_) \
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F(Array, length_) \
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F(GrowableObjectArray, type_arguments_) \
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F(GrowableObjectArray, length_) \
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F(GrowableObjectArray, data_) \
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F(LinkedHashMap, type_arguments_) \
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F(LinkedHashMap, index_) \
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F(LinkedHashMap, hash_mask_) \
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F(LinkedHashMap, data_) \
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F(LinkedHashMap, used_data_) \
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F(LinkedHashMap, deleted_keys_) \
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F(TypedData, length_) \
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F(ExternalTypedData, length_) \
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F(ReceivePort, send_port_) \
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F(ReceivePort, handler_) \
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F(StackTrace, async_link_) \
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F(StackTrace, code_array_) \
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F(StackTrace, pc_offset_array_) \
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F(RegExp, num_bracket_expressions_) \
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F(RegExp, capture_name_map_) \
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F(RegExp, pattern_) \
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F(RegExp, one_byte_) \
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F(RegExp, two_byte_) \
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F(RegExp, external_one_byte_) \
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F(RegExp, external_two_byte_) \
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F(RegExp, one_byte_sticky_) \
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F(RegExp, two_byte_sticky_) \
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F(RegExp, external_one_byte_sticky_) \
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F(RegExp, external_two_byte_sticky_) \
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F(WeakProperty, key_) \
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F(WeakProperty, value_) \
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F(MirrorReference, referent_) \
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F(UserTag, label_) \
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F(PointerBase, data_) \
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F(Pointer, type_arguments_) \
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F(DynamicLibrary, handle_) \
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F(FfiTrampolineData, c_signature_) \
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F(FfiTrampolineData, callback_target_) \
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F(FfiTrampolineData, callback_exceptional_return_) \
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F(TypedDataBase, length_) \
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F(TypedDataView, typed_data_) \
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F(TypedDataView, offset_in_bytes_) \
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F(FutureOr, type_arguments_)
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#define AOT_CLASSES_AND_FIELDS(F)
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#define JIT_CLASSES_AND_FIELDS(F) \
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F(Code, active_instructions_) \
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F(Code, deopt_info_array_) \
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F(Code, static_calls_target_table_) \
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F(ICData, receivers_static_type_) \
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F(Function, unoptimized_code_) \
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F(Field, type_test_cache_) \
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#define NON_PRODUCT_CLASSES_AND_FIELDS(F) \
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F(ReceivePort, debug_name_) \
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F(ReceivePort, allocation_location_)
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#define NON_HEADER_HASH_CLASSES_AND_FIELDS(F) F(String, hash_)
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OffsetsTable::OffsetsTable(Zone* zone) : cached_offsets_(zone) {
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for (intptr_t i = 0; offsets_table[i].class_id != -1; ++i) {
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OffsetsTableEntry entry = offsets_table[i];
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cached_offsets_.Insert({{entry.class_id, entry.offset}, entry.field_name});
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}
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}
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const char* OffsetsTable::FieldNameForOffset(intptr_t class_id,
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intptr_t offset) {
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return cached_offsets_.LookupValue({class_id, offset});
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}
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#define DEFINE_OFFSETS_TABLE_ENTRY(class_name, field_name) \
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{class_name::kClassId, #field_name, \
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OFFSET_OF(Untagged##class_name, field_name)},
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// clang-format off
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OffsetsTable::OffsetsTableEntry OffsetsTable::offsets_table[] = {
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COMMON_CLASSES_AND_FIELDS(DEFINE_OFFSETS_TABLE_ENTRY)
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#if !defined(PRODUCT)
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NON_PRODUCT_CLASSES_AND_FIELDS(DEFINE_OFFSETS_TABLE_ENTRY)
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#endif
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#if !defined(HASH_IN_OBJECT_HEADER)
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NON_HEADER_HASH_CLASSES_AND_FIELDS(DEFINE_OFFSETS_TABLE_ENTRY)
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#endif
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#if defined(DART_PRECOMPILED_RUNTIME)
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AOT_CLASSES_AND_FIELDS(DEFINE_OFFSETS_TABLE_ENTRY)
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#else
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JIT_CLASSES_AND_FIELDS(DEFINE_OFFSETS_TABLE_ENTRY)
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#endif
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{-1, nullptr, -1}
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};
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// clang-format on
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#undef DEFINE_OFFSETS_TABLE_ENTRY
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#endif
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} // namespace dart
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