mirror of
https://github.com/RGBCube/serenity
synced 2025-05-18 01:05:07 +00:00
3c74dc9f4d
This patch adds two macros to declare per-type allocators: - JS_DECLARE_ALLOCATOR(TypeName) - JS_DEFINE_ALLOCATOR(TypeName) When used, they add a type-specific CellAllocator that the Heap will delegate allocation requests to. The result of this is that GC objects of the same type always end up within the same HeapBlock, drastically reducing the ability to perform type confusion attacks. It also improves HeapBlock utilization, since each block now has cells sized exactly to the type used within that block. (Previously we only had a handful of block sizes available, and most GC allocations ended up with a large amount of slack in their tails.) There is a small performance hit from this, but I'm sure we can make up for it elsewhere. Note that the old size-based allocators still exist, and we fall back to them for any type that doesn't have its own CellAllocator.
190 lines
8.5 KiB
C++
190 lines
8.5 KiB
C++
/*
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* Copyright (c) 2022-2023, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibJS/Forward.h>
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#include <LibJS/Heap/Cell.h>
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namespace JS {
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class Intrinsics final : public Cell {
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JS_CELL(Intrinsics, Cell);
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JS_DECLARE_ALLOCATOR(Intrinsics);
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public:
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static ThrowCompletionOr<NonnullGCPtr<Intrinsics>> create(Realm&);
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NonnullGCPtr<Shape> empty_object_shape() { return *m_empty_object_shape; }
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NonnullGCPtr<Shape> new_object_shape() { return *m_new_object_shape; }
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NonnullGCPtr<Shape> new_ordinary_function_prototype_object_shape() { return *m_new_ordinary_function_prototype_object_shape; }
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// Not included in JS_ENUMERATE_NATIVE_OBJECTS due to missing distinct prototype
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NonnullGCPtr<ProxyConstructor> proxy_constructor() { return *m_proxy_constructor; }
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// Not included in JS_ENUMERATE_NATIVE_OBJECTS due to missing distinct constructor
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NonnullGCPtr<Object> async_from_sync_iterator_prototype() { return *m_async_from_sync_iterator_prototype; }
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NonnullGCPtr<Object> async_generator_prototype() { return *m_async_generator_prototype; }
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NonnullGCPtr<Object> generator_prototype() { return *m_generator_prototype; }
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NonnullGCPtr<Object> wrap_for_valid_iterator_prototype() { return *m_wrap_for_valid_iterator_prototype; }
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// Alias for the AsyncGenerator Prototype Object used by the spec (%AsyncGeneratorFunction.prototype.prototype%)
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NonnullGCPtr<Object> async_generator_function_prototype_prototype() { return *m_async_generator_prototype; }
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// Alias for the Generator Prototype Object used by the spec (%GeneratorFunction.prototype.prototype%)
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NonnullGCPtr<Object> generator_function_prototype_prototype() { return *m_generator_prototype; }
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// Not included in JS_ENUMERATE_INTL_OBJECTS due to missing distinct constructor
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NonnullGCPtr<Object> intl_segments_prototype() { return *m_intl_segments_prototype; }
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// Global object functions
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NonnullGCPtr<FunctionObject> eval_function() const { return *m_eval_function; }
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NonnullGCPtr<FunctionObject> is_finite_function() const { return *m_is_finite_function; }
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NonnullGCPtr<FunctionObject> is_nan_function() const { return *m_is_nan_function; }
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NonnullGCPtr<FunctionObject> parse_float_function() const { return *m_parse_float_function; }
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NonnullGCPtr<FunctionObject> parse_int_function() const { return *m_parse_int_function; }
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NonnullGCPtr<FunctionObject> decode_uri_function() const { return *m_decode_uri_function; }
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NonnullGCPtr<FunctionObject> decode_uri_component_function() const { return *m_decode_uri_component_function; }
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NonnullGCPtr<FunctionObject> encode_uri_function() const { return *m_encode_uri_function; }
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NonnullGCPtr<FunctionObject> encode_uri_component_function() const { return *m_encode_uri_component_function; }
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NonnullGCPtr<FunctionObject> escape_function() const { return *m_escape_function; }
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NonnullGCPtr<FunctionObject> unescape_function() const { return *m_unescape_function; }
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// Namespace/constructor object functions
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NonnullGCPtr<FunctionObject> array_prototype_values_function() const { return *m_array_prototype_values_function; }
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NonnullGCPtr<FunctionObject> date_constructor_now_function() const { return *m_date_constructor_now_function; }
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NonnullGCPtr<FunctionObject> json_parse_function() const { return *m_json_parse_function; }
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NonnullGCPtr<FunctionObject> json_stringify_function() const { return *m_json_stringify_function; }
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NonnullGCPtr<FunctionObject> object_prototype_to_string_function() const { return *m_object_prototype_to_string_function; }
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NonnullGCPtr<FunctionObject> throw_type_error_function() const { return *m_throw_type_error_function; }
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
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NonnullGCPtr<ConstructorName> snake_name##_constructor(); \
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NonnullGCPtr<Object> snake_name##_prototype();
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JS_ENUMERATE_BUILTIN_TYPES
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#undef __JS_ENUMERATE
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
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NonnullGCPtr<Intl::ConstructorName> intl_##snake_name##_constructor(); \
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NonnullGCPtr<Object> intl_##snake_name##_prototype();
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JS_ENUMERATE_INTL_OBJECTS
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#undef __JS_ENUMERATE
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
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NonnullGCPtr<Temporal::ConstructorName> temporal_##snake_name##_constructor(); \
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NonnullGCPtr<Object> temporal_##snake_name##_prototype();
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JS_ENUMERATE_TEMPORAL_OBJECTS
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#undef __JS_ENUMERATE
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#define __JS_ENUMERATE(ClassName, snake_name) \
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NonnullGCPtr<ClassName> snake_name##_object();
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JS_ENUMERATE_BUILTIN_NAMESPACE_OBJECTS
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#undef __JS_ENUMERATE
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#define __JS_ENUMERATE(ClassName, snake_name) \
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NonnullGCPtr<Object> snake_name##_prototype() \
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{ \
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return *m_##snake_name##_prototype; \
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}
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JS_ENUMERATE_ITERATOR_PROTOTYPES
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#undef __JS_ENUMERATE
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private:
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Intrinsics(Realm& realm)
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: m_realm(realm)
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{
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}
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virtual void visit_edges(Visitor&) override;
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ThrowCompletionOr<void> initialize_intrinsics(Realm&);
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
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void initialize_##snake_name();
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JS_ENUMERATE_BUILTIN_TYPES
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#undef __JS_ENUMERATE
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
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void initialize_intl_##snake_name();
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JS_ENUMERATE_INTL_OBJECTS
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#undef __JS_ENUMERATE
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
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void initialize_temporal_##snake_name();
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JS_ENUMERATE_TEMPORAL_OBJECTS
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#undef __JS_ENUMERATE
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NonnullGCPtr<Realm> m_realm;
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GCPtr<Shape> m_empty_object_shape;
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GCPtr<Shape> m_new_object_shape;
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GCPtr<Shape> m_new_ordinary_function_prototype_object_shape;
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// Not included in JS_ENUMERATE_NATIVE_OBJECTS due to missing distinct prototype
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GCPtr<ProxyConstructor> m_proxy_constructor;
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// Not included in JS_ENUMERATE_NATIVE_OBJECTS due to missing distinct constructor
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GCPtr<Object> m_async_from_sync_iterator_prototype;
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GCPtr<Object> m_async_generator_prototype;
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GCPtr<Object> m_generator_prototype;
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GCPtr<Object> m_wrap_for_valid_iterator_prototype;
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// Not included in JS_ENUMERATE_INTL_OBJECTS due to missing distinct constructor
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GCPtr<Object> m_intl_segments_prototype;
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// Global object functions
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GCPtr<FunctionObject> m_eval_function;
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GCPtr<FunctionObject> m_is_finite_function;
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GCPtr<FunctionObject> m_is_nan_function;
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GCPtr<FunctionObject> m_parse_float_function;
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GCPtr<FunctionObject> m_parse_int_function;
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GCPtr<FunctionObject> m_decode_uri_function;
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GCPtr<FunctionObject> m_decode_uri_component_function;
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GCPtr<FunctionObject> m_encode_uri_function;
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GCPtr<FunctionObject> m_encode_uri_component_function;
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GCPtr<FunctionObject> m_escape_function;
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GCPtr<FunctionObject> m_unescape_function;
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// Namespace/constructor object functions
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GCPtr<FunctionObject> m_array_prototype_values_function;
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GCPtr<FunctionObject> m_date_constructor_now_function;
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GCPtr<FunctionObject> m_json_parse_function;
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GCPtr<FunctionObject> m_json_stringify_function;
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GCPtr<FunctionObject> m_object_prototype_to_string_function;
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GCPtr<FunctionObject> m_throw_type_error_function;
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
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GCPtr<ConstructorName> m_##snake_name##_constructor; \
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GCPtr<Object> m_##snake_name##_prototype;
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JS_ENUMERATE_BUILTIN_TYPES
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#undef __JS_ENUMERATE
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
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GCPtr<Intl::ConstructorName> m_intl_##snake_name##_constructor; \
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GCPtr<Object> m_intl_##snake_name##_prototype;
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JS_ENUMERATE_INTL_OBJECTS
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#undef __JS_ENUMERATE
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
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GCPtr<Temporal::ConstructorName> m_temporal_##snake_name##_constructor; \
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GCPtr<Object> m_temporal_##snake_name##_prototype;
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JS_ENUMERATE_TEMPORAL_OBJECTS
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#undef __JS_ENUMERATE
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#define __JS_ENUMERATE(ClassName, snake_name) \
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GCPtr<ClassName> m_##snake_name##_object;
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JS_ENUMERATE_BUILTIN_NAMESPACE_OBJECTS
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#undef __JS_ENUMERATE
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#define __JS_ENUMERATE(ClassName, snake_name) \
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GCPtr<Object> m_##snake_name##_prototype;
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JS_ENUMERATE_ITERATOR_PROTOTYPES
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#undef __JS_ENUMERATE
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};
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void add_restricted_function_properties(FunctionObject&, Realm&);
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}
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