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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/BytecodeInterpreter.h>
#include <LibWasm/Types.h>
TEST_ROOT("Userland/Libraries/LibWasm/Tests");
TESTJS_GLOBAL_FUNCTION(read_binary_wasm_file, readBinaryWasmFile)
{
auto filename = TRY_OR_DISCARD(vm.argument(0).to_string(global_object));
auto file = Core::File::open(filename, Core::OpenMode::ReadOnly);
if (file.is_error()) {
vm.throw_exception<JS::TypeError>(global_object, file.error().string());
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)
{
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 WebAssemblyModule* create(JS::GlobalObject& global_object, Wasm::Module module, HashMap<Wasm::Linker::Name, Wasm::ExternValue> const& imports)
{
auto instance = global_object.heap().allocate<WebAssemblyModule>(global_object, *global_object.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()) {
global_object.vm().throw_exception<JS::TypeError>(global_object, "Link failed");
} else {
if (auto result = machine().instantiate(*instance->m_module, link_result.release_value()); 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_OLD_NATIVE_FUNCTION(get_export);
JS_DECLARE_OLD_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* object = TRY_OR_DISCARD(vm.argument(0).to_object(global_object));
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() };
ScopeGuard handle_stream_error {
[&] {
stream.handle_any_error();
}
};
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, "Binary stream contained errors");
return {};
}
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 WebAssemblyModule::create(global_object, result.release_value(), imports);
}
TESTJS_GLOBAL_FUNCTION(compare_typed_arrays, compareTypedArrays)
{
auto* lhs = TRY_OR_DISCARD(vm.argument(0).to_object(global_object));
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 = TRY_OR_DISCARD(vm.argument(1).to_object(global_object));
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, 1, JS::default_attributes);
define_native_function("invoke", wasm_invoke, 1, JS::default_attributes);
}
JS_DEFINE_OLD_NATIVE_FUNCTION(WebAssemblyModule::get_export)
{
auto name = TRY_OR_DISCARD(vm.argument(0).to_string(global_object));
auto this_value = vm.this_value(global_object);
auto* object = TRY_OR_DISCARD(this_value.to_object(global_object));
if (!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()));
if (auto v = value.get_pointer<Wasm::GlobalAddress>()) {
return m_machine.store().get(*v)->value().value().visit(
[&](const auto& 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::js_bigint(vm, Crypto::SignedBigInteger::create_from(value)); },
[&](const Wasm::Reference& 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())); });
});
}
vm.throw_exception<JS::TypeError>(global_object, String::formatted("'{}' does not refer to a function or a global", name));
return {};
}
}
vm.throw_exception<JS::TypeError>(global_object, String::formatted("'{}' could not be found", name));
return {};
}
JS_DEFINE_OLD_NATIVE_FUNCTION(WebAssemblyModule::wasm_invoke)
{
auto address = static_cast<unsigned long>(TRY_OR_DISCARD(vm.argument(0).to_double(global_object)));
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 argument = vm.argument(index++);
double double_value = 0;
if (!argument.is_bigint())
double_value = TRY_OR_DISCARD(argument.to_double(global_object));
switch (param.kind()) {
case Wasm::ValueType::Kind::I32:
arguments.append(Wasm::Value(param, static_cast<u64>(double_value)));
break;
case Wasm::ValueType::Kind::I64:
if (argument.is_bigint()) {
auto value = TRY_OR_DISCARD(argument.to_bigint_int64(global_object));
arguments.append(Wasm::Value(param, bit_cast<u64>(value)));
} else {
arguments.append(Wasm::Value(param, static_cast<u64>(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()) {
vm.throw_exception<JS::TypeError>(global_object, String::formatted("Execution trapped: {}", result.trap().reason));
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)); },
[&](i32 value) { return_value = JS::Value(static_cast<double>(value)); },
[&](i64 value) { return_value = JS::Value(JS::js_bigint(vm, Crypto::SignedBigInteger::create_from(value))); },
[&](const Wasm::Reference& reference) {
reference.ref().visit(
[&](const Wasm::Reference::Null&) { return_value = JS::js_null(); },
[&](const auto& ref) { return_value = JS::Value(static_cast<double>(ref.address.value())); });
});
return return_value;
}
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