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/*
* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/MemoryStream.h>
#include <LibTest/JavaScriptTestRunner.h>
#include <LibWasm/AbstractMachine/BytecodeInterpreter.h>
#include <LibWasm/Types.h>
#include <string.h>
TEST_ROOT("Userland/Libraries/LibWasm/Tests");
TESTJS_GLOBAL_FUNCTION(read_binary_wasm_file, readBinaryWasmFile)
{
auto& realm = *vm.current_realm();
auto error_code_to_string = [](int code) {
auto const* error_string = strerror(code);
return StringView { error_string, strlen(error_string) };
};
auto filename = TRY(vm.argument(0).to_deprecated_string(vm));
auto file = Core::File::open(filename, Core::File::OpenMode::Read);
if (file.is_error())
return vm.throw_completion<JS::TypeError>(error_code_to_string(file.error().code()));
auto file_size = file.value()->size();
if (file_size.is_error())
return vm.throw_completion<JS::TypeError>(error_code_to_string(file_size.error().code()));
auto array = TRY(JS::Uint8Array::create(realm, file_size.value()));
auto read = file.value()->read_until_filled(array->data());
if (read.is_error())
return vm.throw_completion<JS::TypeError>(error_code_to_string(read.error().code()));
return JS::Value(array);
}
class WebAssemblyModule final : public JS::Object {
JS_OBJECT(WebAssemblyModule, JS::Object);
public:
explicit WebAssemblyModule(JS::Object& prototype)
: JS::Object(ConstructWithPrototypeTag::Tag, prototype)
{
m_machine.enable_instruction_count_limit();
}
static Wasm::AbstractMachine& machine() { return m_machine; }
Wasm::Module& module() { return *m_module; }
Wasm::ModuleInstance& module_instance() { return *m_module_instance; }
static JS::ThrowCompletionOr<WebAssemblyModule*> create(JS::Realm& realm, Wasm::Module module, HashMap<Wasm::Linker::Name, Wasm::ExternValue> const& imports)
{
auto& vm = realm.vm();
auto instance = MUST_OR_THROW_OOM(realm.heap().allocate<WebAssemblyModule>(realm, *realm.intrinsics().object_prototype()));
instance->m_module = move(module);
Wasm::Linker linker(*instance->m_module);
linker.link(imports);
linker.link(spec_test_namespace());
auto link_result = linker.finish();
if (link_result.is_error())
return vm.throw_completion<JS::TypeError>("Link failed"sv);
auto result = machine().instantiate(*instance->m_module, link_result.release_value());
if (result.is_error())
return vm.throw_completion<JS::TypeError>(result.release_error().error);
instance->m_module_instance = result.release_value();
return instance.ptr();
}
JS::ThrowCompletionOr<void> initialize(JS::Realm&) override;
~WebAssemblyModule() override = default;
private:
JS_DECLARE_NATIVE_FUNCTION(get_export);
JS_DECLARE_NATIVE_FUNCTION(wasm_invoke);
static HashMap<Wasm::Linker::Name, Wasm::ExternValue> const& spec_test_namespace()
{
if (!s_spec_test_namespace.is_empty())
return s_spec_test_namespace;
Wasm::FunctionType print_i32_type { { Wasm::ValueType(Wasm::ValueType::I32) }, {} };
auto address = m_machine.store().allocate(Wasm::HostFunction {
[](auto&, auto&) -> Wasm::Result {
// Noop, this just needs to exist.
return Wasm::Result { Vector<Wasm::Value> {} };
},
print_i32_type });
s_spec_test_namespace.set({ "spectest", "print_i32", print_i32_type }, Wasm::ExternValue { *address });
return s_spec_test_namespace;
}
static HashMap<Wasm::Linker::Name, Wasm::ExternValue> s_spec_test_namespace;
static Wasm::AbstractMachine m_machine;
Optional<Wasm::Module> m_module;
OwnPtr<Wasm::ModuleInstance> m_module_instance;
};
Wasm::AbstractMachine WebAssemblyModule::m_machine;
HashMap<Wasm::Linker::Name, Wasm::ExternValue> WebAssemblyModule::s_spec_test_namespace;
TESTJS_GLOBAL_FUNCTION(parse_webassembly_module, parseWebAssemblyModule)
{
auto& realm = *vm.current_realm();
auto* object = TRY(vm.argument(0).to_object(vm));
if (!is<JS::Uint8Array>(object))
return vm.throw_completion<JS::TypeError>("Expected a Uint8Array argument to parse_webassembly_module"sv);
auto& array = static_cast<JS::Uint8Array&>(*object);
FixedMemoryStream stream { array.data() };
auto result = Wasm::Module::parse(stream);
if (result.is_error())
return vm.throw_completion<JS::SyntaxError>(Wasm::parse_error_to_deprecated_string(result.error()));
HashMap<Wasm::Linker::Name, Wasm::ExternValue> imports;
auto import_value = vm.argument(1);
if (import_value.is_object()) {
auto& import_object = import_value.as_object();
for (auto& property : import_object.shape().property_table()) {
auto value = import_object.get_without_side_effects(property.key);
if (!value.is_object() || !is<WebAssemblyModule>(value.as_object()))
continue;
auto& module_object = static_cast<WebAssemblyModule&>(value.as_object());
for (auto& entry : module_object.module_instance().exports()) {
// FIXME: Don't pretend that everything is a function
imports.set({ property.key.as_string(), entry.name(), Wasm::TypeIndex(0) }, entry.value());
}
}
}
return JS::Value(TRY(WebAssemblyModule::create(realm, result.release_value(), imports)));
}
TESTJS_GLOBAL_FUNCTION(compare_typed_arrays, compareTypedArrays)
{
auto* lhs = TRY(vm.argument(0).to_object(vm));
if (!is<JS::TypedArrayBase>(lhs))
return vm.throw_completion<JS::TypeError>("Expected a TypedArray"sv);
auto& lhs_array = static_cast<JS::TypedArrayBase&>(*lhs);
auto* rhs = TRY(vm.argument(1).to_object(vm));
if (!is<JS::TypedArrayBase>(rhs))
return vm.throw_completion<JS::TypeError>("Expected a TypedArray"sv);
auto& rhs_array = static_cast<JS::TypedArrayBase&>(*rhs);
return JS::Value(lhs_array.viewed_array_buffer()->buffer() == rhs_array.viewed_array_buffer()->buffer());
}
JS::ThrowCompletionOr<void> WebAssemblyModule::initialize(JS::Realm& realm)
{
MUST_OR_THROW_OOM(Base::initialize(realm));
define_native_function(realm, "getExport", get_export, 1, JS::default_attributes);
define_native_function(realm, "invoke", wasm_invoke, 1, JS::default_attributes);
return {};
}
JS_DEFINE_NATIVE_FUNCTION(WebAssemblyModule::get_export)
{
auto name = TRY(vm.argument(0).to_deprecated_string(vm));
auto this_value = vm.this_value();
auto* object = TRY(this_value.to_object(vm));
if (!is<WebAssemblyModule>(object))
return vm.throw_completion<JS::TypeError>("Not a WebAssemblyModule"sv);
auto instance = static_cast<WebAssemblyModule*>(object);
for (auto& entry : instance->module_instance().exports()) {
if (entry.name() == name) {
auto& value = entry.value();
if (auto ptr = value.get_pointer<Wasm::FunctionAddress>())
return JS::Value(static_cast<unsigned long>(ptr->value()));
if (auto v = value.get_pointer<Wasm::GlobalAddress>()) {
return m_machine.store().get(*v)->value().value().visit(
[&](auto const& value) -> JS::Value { return JS::Value(static_cast<double>(value)); },
[&](i32 value) { return JS::Value(static_cast<double>(value)); },
[&](i64 value) -> JS::Value { return JS::BigInt::create(vm, Crypto::SignedBigInteger { value }); },
[&](Wasm::Reference const& reference) -> JS::Value {
return reference.ref().visit(
[&](const Wasm::Reference::Null&) -> JS::Value { return JS::js_null(); },
[&](const auto& ref) -> JS::Value { return JS::Value(static_cast<double>(ref.address.value())); });
});
}
return vm.throw_completion<JS::TypeError>(TRY_OR_THROW_OOM(vm, String::formatted("'{}' does not refer to a function or a global", name)));
}
}
return vm.throw_completion<JS::TypeError>(TRY_OR_THROW_OOM(vm, String::formatted("'{}' could not be found", name)));
}
JS_DEFINE_NATIVE_FUNCTION(WebAssemblyModule::wasm_invoke)
{
auto address = static_cast<unsigned long>(TRY(vm.argument(0).to_double(vm)));
Wasm::FunctionAddress function_address { address };
auto function_instance = WebAssemblyModule::machine().store().get(function_address);
if (!function_instance)
return vm.throw_completion<JS::TypeError>("Invalid function address"sv);
Wasm::FunctionType const* type { nullptr };
function_instance->visit([&](auto& value) { type = &value.type(); });
if (!type)
return vm.throw_completion<JS::TypeError>("Invalid function found at given address"sv);
Vector<Wasm::Value> arguments;
if (type->parameters().size() + 1 > vm.argument_count())
return vm.throw_completion<JS::TypeError>(TRY_OR_THROW_OOM(vm, String::formatted("Expected {} arguments for call, but found {}", type->parameters().size() + 1, vm.argument_count())));
size_t index = 1;
for (auto& param : type->parameters()) {
auto argument = vm.argument(index++);
double double_value = 0;
if (!argument.is_bigint())
double_value = TRY(argument.to_double(vm));
switch (param.kind()) {
case Wasm::ValueType::Kind::I32:
arguments.append(Wasm::Value(param, static_cast<i64>(double_value)));
break;
case Wasm::ValueType::Kind::I64:
if (argument.is_bigint()) {
auto value = TRY(argument.to_bigint_int64(vm));
arguments.append(Wasm::Value(param, value));
} else {
arguments.append(Wasm::Value(param, static_cast<i64>(double_value)));
}
break;
case Wasm::ValueType::Kind::F32:
arguments.append(Wasm::Value(static_cast<float>(double_value)));
break;
case Wasm::ValueType::Kind::F64:
arguments.append(Wasm::Value(static_cast<double>(double_value)));
break;
case Wasm::ValueType::Kind::FunctionReference:
arguments.append(Wasm::Value(Wasm::Reference { Wasm::Reference::Func { static_cast<u64>(double_value) } }));
break;
case Wasm::ValueType::Kind::ExternReference:
arguments.append(Wasm::Value(Wasm::Reference { Wasm::Reference::Func { static_cast<u64>(double_value) } }));
break;
case Wasm::ValueType::Kind::NullFunctionReference:
arguments.append(Wasm::Value(Wasm::Reference { Wasm::Reference::Null { Wasm::ValueType(Wasm::ValueType::Kind::FunctionReference) } }));
break;
case Wasm::ValueType::Kind::NullExternReference:
arguments.append(Wasm::Value(Wasm::Reference { Wasm::Reference::Null { Wasm::ValueType(Wasm::ValueType::Kind::ExternReference) } }));
break;
}
}
auto result = WebAssemblyModule::machine().invoke(function_address, arguments);
if (result.is_trap())
return vm.throw_completion<JS::TypeError>(TRY_OR_THROW_OOM(vm, String::formatted("Execution trapped: {}", result.trap().reason)));
if (result.is_completion())
return result.completion();
if (result.values().is_empty())
return JS::js_null();
auto to_js_value = [&](Wasm::Value const& value) {
return value.value().visit(
[](auto const& value) { return JS::Value(static_cast<double>(value)); },
[](i32 value) { return JS::Value(static_cast<double>(value)); },
[&](i64 value) { return JS::Value(JS::BigInt::create(vm, Crypto::SignedBigInteger { value })); },
[](Wasm::Reference const& reference) {
return reference.ref().visit(
[](const Wasm::Reference::Null&) { return JS::js_null(); },
[](const auto& ref) { return JS::Value(static_cast<double>(ref.address.value())); });
});
};
if (result.values().size() == 1)
return to_js_value(result.values().first());
return JS::Array::create_from<Wasm::Value>(*vm.current_realm(), result.values(), [&](Wasm::Value value) {
return to_js_value(value);
});
}
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