Coverage Report

Created: 2025-09-05 06:52

/src/serenity/Userland/Libraries/LibJS/Runtime/SharedArrayBufferConstructor.cpp
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/*
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 * Copyright (c) 2023, Shannon Booth <shannon@serenityos.org>
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 *
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 * SPDX-License-Identifier: BSD-2-Clause
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 */
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#include <AK/TypeCasts.h>
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#include <LibJS/Forward.h>
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#include <LibJS/Runtime/ArrayBuffer.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/SharedArrayBufferConstructor.h>
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#include <LibJS/Runtime/TypedArray.h>
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namespace JS {
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JS_DEFINE_ALLOCATOR(SharedArrayBufferConstructor);
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SharedArrayBufferConstructor::SharedArrayBufferConstructor(Realm& realm)
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    : NativeFunction(realm.vm().names.SharedArrayBuffer.as_string(), realm.intrinsics().function_prototype())
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{
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}
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void SharedArrayBufferConstructor::initialize(Realm& realm)
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{
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    auto& vm = this->vm();
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    Base::initialize(realm);
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    // 25.2.4.1 SharedArrayBuffer.prototype, https://tc39.es/ecma262/#sec-sharedarraybuffer.prototype
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    define_direct_property(vm.names.prototype, realm.intrinsics().shared_array_buffer_prototype(), 0);
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    // 25.2.5.7 SharedArrayBuffer.prototype [ @@toStringTag ], https://tc39.es/ecma262/#sec-sharedarraybuffer.prototype.toString
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    define_native_accessor(realm, vm.well_known_symbol_species(), symbol_species_getter, {}, Attribute::Configurable);
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    define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
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}
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// 25.2.3.1 SharedArrayBuffer ( length [ , options ] ), https://tc39.es/ecma262/#sec-sharedarraybuffer-length
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ThrowCompletionOr<Value> SharedArrayBufferConstructor::call()
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{
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    auto& vm = this->vm();
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    // 1. If NewTarget is undefined, throw a TypeError exception.
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    return vm.throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, vm.names.SharedArrayBuffer);
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}
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// 25.2.3.1 SharedArrayBuffer ( length [ , options ] ), https://tc39.es/ecma262/#sec-sharedarraybuffer-length
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ThrowCompletionOr<NonnullGCPtr<Object>> SharedArrayBufferConstructor::construct(FunctionObject& new_target)
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{
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    auto& vm = this->vm();
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    // 2. Let byteLength be ? ToIndex(length).
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    auto byte_length_or_error = vm.argument(0).to_index(vm);
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    if (byte_length_or_error.is_error()) {
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        auto error = byte_length_or_error.release_error();
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        if (error.value()->is_object() && is<RangeError>(error.value()->as_object())) {
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            // Re-throw more specific RangeError
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            return vm.throw_completion<RangeError>(ErrorType::InvalidLength, "shared array buffer");
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        }
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        return error;
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    }
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    // 3. Return ? AllocateSharedArrayBuffer(NewTarget, byteLength).
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    return *TRY(allocate_shared_array_buffer(vm, new_target, byte_length_or_error.release_value()));
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}
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// 25.2.4.2 get SharedArrayBuffer [ @@species ], https://tc39.es/ecma262/#sec-sharedarraybuffer-@@species
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JS_DEFINE_NATIVE_FUNCTION(SharedArrayBufferConstructor::symbol_species_getter)
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{
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    // 1. Return the this value.
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    return vm.this_value();
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}
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}