1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
/*
* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/TypedArray.h>
#include <LibWeb/Bindings/WindowObject.h>
#include <LibWeb/WebAssembly/WebAssemblyObject.h>
#include <LibWeb/WebAssembly/WebAssemblyTableConstructor.h>
#include <LibWeb/WebAssembly/WebAssemblyTableObject.h>
#include <LibWeb/WebAssembly/WebAssemblyTablePrototype.h>
namespace Web::Bindings {
WebAssemblyTableConstructor::WebAssemblyTableConstructor(JS::GlobalObject& global_object)
: NativeFunction(*global_object.function_prototype())
{
}
WebAssemblyTableConstructor::~WebAssemblyTableConstructor()
{
}
JS::ThrowCompletionOr<JS::Value> WebAssemblyTableConstructor::call()
{
return vm().throw_completion<JS::TypeError>(global_object(), JS::ErrorType::ConstructorWithoutNew, "WebAssembly.Table");
}
JS::ThrowCompletionOr<JS::Object*> WebAssemblyTableConstructor::construct(FunctionObject&)
{
auto& vm = this->vm();
auto& global_object = this->global_object();
auto descriptor = TRY(vm.argument(0).to_object(global_object));
auto element_value = TRY(descriptor->get("element"));
if (!element_value.is_string())
return vm.throw_completion<JS::TypeError>(global_object, JS::ErrorType::InvalidHint, element_value.to_string_without_side_effects());
auto& element = element_value.as_string().string();
Optional<Wasm::ValueType> reference_type;
if (element == "anyfunc"sv)
reference_type = Wasm::ValueType(Wasm::ValueType::FunctionReference);
else if (element == "externref"sv)
reference_type = Wasm::ValueType(Wasm::ValueType::ExternReference);
if (!reference_type.has_value())
return vm.throw_completion<JS::TypeError>(global_object, JS::ErrorType::InvalidHint, element);
auto initial_value = TRY(descriptor->get("initial"));
auto maximum_value = TRY(descriptor->get("maximum"));
auto initial = TRY(initial_value.to_u32(global_object));
Optional<u32> maximum;
if (!maximum_value.is_undefined())
maximum = TRY(maximum_value.to_u32(global_object));
if (maximum.has_value() && maximum.value() < initial)
return vm.throw_completion<JS::RangeError>(global_object, "maximum should be larger than or equal to initial");
auto value_value = TRY(descriptor->get("value"));
auto reference_value = [&]() -> Optional<Wasm::Value> {
if (value_value.is_undefined())
return Wasm::Value(*reference_type, 0ull);
return to_webassembly_value(global_object, value_value, *reference_type);
}();
if (auto* exception = vm.exception())
return JS::throw_completion(exception->value());
auto& reference = reference_value->value().get<Wasm::Reference>();
auto address = WebAssemblyObject::s_abstract_machine.store().allocate(Wasm::TableType { *reference_type, Wasm::Limits { initial, maximum } });
if (!address.has_value())
return vm.throw_completion<JS::TypeError>(global_object, "Wasm Table allocation failed");
auto& table = *WebAssemblyObject::s_abstract_machine.store().get(*address);
for (auto& element : table.elements())
element = reference;
return vm.heap().allocate<WebAssemblyTableObject>(global_object, global_object, *address);
}
void WebAssemblyTableConstructor::initialize(JS::GlobalObject& global_object)
{
auto& vm = this->vm();
auto& window = static_cast<WindowObject&>(global_object);
NativeFunction::initialize(global_object);
define_direct_property(vm.names.prototype, &window.ensure_web_prototype<WebAssemblyTablePrototype>("WebAssemblyTablePrototype"), 0);
define_direct_property(vm.names.length, JS::Value(1), JS::Attribute::Configurable);
}
}
|
