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/*
* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibCore/File.h>
#include <LibTest/JavaScriptTestRunner.h>
#include <LibWasm/AbstractMachine/Interpreter.h>
#include <LibWasm/Types.h>
TEST_ROOT("Userland/Libraries/LibWasm/Tests");
TESTJS_GLOBAL_FUNCTION(read_binary_wasm_file, readBinaryWasmFile)
{
auto filename = vm.argument(0).to_string(global_object);
if (vm.exception())
return {};
auto file = Core::File::open(filename, Core::OpenMode::ReadOnly);
if (file.is_error()) {
vm.throw_exception<JS::TypeError>(global_object, file.error());
return {};
}
auto contents = file.value()->read_all();
auto array = JS::Uint8Array::create(global_object, contents.size());
contents.span().copy_to(array->data());
return array;
}
class WebAssemblyModule final : public JS::Object {
JS_OBJECT(WebAssemblyModule, JS::Object);
public:
explicit WebAssemblyModule(JS::Object& prototype)
: JS::Object(prototype)
{
}
static Wasm::AbstractMachine& machine() { return m_machine; }
Wasm::Module& module() { return *m_module; }
Wasm::ModuleInstance& module_instance() { return *m_module_instance; }
static WebAssemblyModule* create(JS::GlobalObject& global_object, Wasm::Module module)
{
auto instance = global_object.heap().allocate<WebAssemblyModule>(global_object, *global_object.object_prototype());
instance->m_module = move(module);
if (auto result = machine().instantiate(*instance->m_module, {}); result.is_error())
global_object.vm().throw_exception<JS::TypeError>(global_object, result.release_error().error);
else
instance->m_module_instance = result.release_value();
return instance;
}
void initialize(JS::GlobalObject&) override;
~WebAssemblyModule() override = default;
private:
JS_DECLARE_NATIVE_FUNCTION(get_export);
JS_DECLARE_NATIVE_FUNCTION(wasm_invoke);
static Wasm::AbstractMachine m_machine;
Optional<Wasm::Module> m_module;
OwnPtr<Wasm::ModuleInstance> m_module_instance;
};
Wasm::AbstractMachine WebAssemblyModule::m_machine;
TESTJS_GLOBAL_FUNCTION(parse_webassembly_module, parseWebAssemblyModule)
{
auto object = vm.argument(0).to_object(global_object);
if (vm.exception())
return {};
if (!is<JS::Uint8Array>(object)) {
vm.throw_exception<JS::TypeError>(global_object, "Expected a Uint8Array argument to parse_webassembly_module");
return {};
}
auto& array = static_cast<JS::Uint8Array&>(*object);
InputMemoryStream stream { array.data() };
auto result = Wasm::Module::parse(stream);
if (result.is_error()) {
vm.throw_exception<JS::SyntaxError>(global_object, Wasm::parse_error_to_string(result.error()));
return {};
}
if (stream.handle_any_error()) {
vm.throw_exception<JS::SyntaxError>(global_object, "Bianry stream contained errors");
return {};
}
return WebAssemblyModule::create(global_object, result.release_value());
}
TESTJS_GLOBAL_FUNCTION(compare_typed_arrays, compareTypedArrays)
{
auto lhs = vm.argument(0).to_object(global_object);
if (vm.exception())
return {};
if (!is<JS::TypedArrayBase>(lhs)) {
vm.throw_exception<JS::TypeError>(global_object, "Expected a TypedArray");
return {};
}
auto& lhs_array = static_cast<JS::TypedArrayBase&>(*lhs);
auto rhs = vm.argument(1).to_object(global_object);
if (vm.exception())
return {};
if (!is<JS::TypedArrayBase>(rhs)) {
vm.throw_exception<JS::TypeError>(global_object, "Expected a TypedArray");
return {};
}
auto& rhs_array = static_cast<JS::TypedArrayBase&>(*rhs);
return JS::Value(lhs_array.viewed_array_buffer()->buffer() == rhs_array.viewed_array_buffer()->buffer());
}
void WebAssemblyModule::initialize(JS::GlobalObject& global_object)
{
Base::initialize(global_object);
define_native_function("getExport", get_export);
define_native_function("invoke", wasm_invoke);
}
JS_DEFINE_NATIVE_FUNCTION(WebAssemblyModule::get_export)
{
auto name = vm.argument(0).to_string(global_object);
if (vm.exception())
return {};
auto this_value = vm.this_value(global_object);
auto object = this_value.to_object(global_object);
if (vm.exception())
return {};
if (!object || !is<WebAssemblyModule>(object)) {
vm.throw_exception<JS::TypeError>(global_object, "Not a WebAssemblyModule");
return {};
}
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()));
vm.throw_exception<JS::TypeError>(global_object, String::formatted("'{}' does not refer to a function", name));
return {};
}
}
vm.throw_exception<JS::TypeError>(global_object, String::formatted("'{}' could not be found", name));
return {};
}
JS_DEFINE_NATIVE_FUNCTION(WebAssemblyModule::wasm_invoke)
{
auto address = static_cast<unsigned long>(vm.argument(0).to_double(global_object));
if (vm.exception())
return {};
Wasm::FunctionAddress function_address { address };
auto function_instance = WebAssemblyModule::machine().store().get(function_address);
if (!function_instance) {
vm.throw_exception<JS::TypeError>(global_object, "Invalid function address");
return {};
}
const Wasm::FunctionType* type { nullptr };
function_instance->visit([&](auto& value) { type = &value.type(); });
if (!type) {
vm.throw_exception<JS::TypeError>(global_object, "Invalid function found at given address");
return {};
}
Vector<Wasm::Value> arguments;
if (type->parameters().size() + 1 > vm.argument_count()) {
vm.throw_exception<JS::TypeError>(global_object, String::formatted("Expected {} arguments for call, but found {}", type->parameters().size() + 1, vm.argument_count()));
return {};
}
size_t index = 1;
for (auto& param : type->parameters()) {
auto value = vm.argument(index++).to_double(global_object);
switch (param.kind()) {
case Wasm::ValueType::Kind::I32:
arguments.append(Wasm::Value(param, static_cast<u64>(value)));
break;
case Wasm::ValueType::Kind::I64:
arguments.append(Wasm::Value(param, static_cast<u64>(value)));
break;
case Wasm::ValueType::Kind::F32:
arguments.append(Wasm::Value(static_cast<float>(value)));
break;
case Wasm::ValueType::Kind::F64:
arguments.append(Wasm::Value(static_cast<double>(value)));
break;
case Wasm::ValueType::Kind::FunctionReference:
arguments.append(Wasm::Value(Wasm::FunctionAddress { static_cast<u64>(value) }));
break;
case Wasm::ValueType::Kind::ExternReference:
arguments.append(Wasm::Value(Wasm::ExternAddress { static_cast<u64>(value) }));
break;
case Wasm::ValueType::Kind::NullFunctionReference:
arguments.append(Wasm::Value(Wasm::Value::Null { Wasm::ValueType(Wasm::ValueType::Kind::FunctionReference) }));
break;
case Wasm::ValueType::Kind::NullExternReference:
arguments.append(Wasm::Value(Wasm::Value::Null { Wasm::ValueType(Wasm::ValueType::Kind::ExternReference) }));
break;
}
}
auto result = WebAssemblyModule::machine().invoke(function_address, arguments);
if (result.is_trap()) {
vm.throw_exception<JS::TypeError>(global_object, "Execution trapped");
return {};
}
if (result.values().is_empty())
return JS::js_null();
JS::Value return_value;
result.values().first().value().visit(
[&](const auto& value) { return_value = JS::Value(static_cast<double>(value)); },
[&](const Wasm::FunctionAddress& index) { return_value = JS::Value(static_cast<double>(index.value())); },
[&](const Wasm::ExternAddress& index) { return_value = JS::Value(static_cast<double>(index.value())); },
[&](const Wasm::Value::Null&) { return_value = JS::js_null(); });
return return_value;
}
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