LibWasm+Meta: Implement instantiation/execution primitives in test-wasm

This also optionally generates a test suite from the WebAssembly
testsuite, which can be enabled via passing `INCLUDE_WASM_SPEC_TESTS`
to cmake, which will generate test-wasm-compatible tests and the
required fixtures.
The generated directories are excluded from git since there's no point
in committing them.
This commit is contained in:
Ali Mohammad Pur 2021-05-07 10:02:58 +04:30 committed by Linus Groh
parent 541091500c
commit 24b2a6c93a
Notes: sideshowbarker 2024-07-18 17:39:50 +09:00
5 changed files with 396 additions and 7 deletions

1
.gitignore vendored
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@ -27,3 +27,4 @@ sync-local.sh
.vim/ .vim/
Userland/Libraries/LibWasm/Tests/Fixtures/SpecTests Userland/Libraries/LibWasm/Tests/Fixtures/SpecTests
Userland/Libraries/LibWasm/Tests/Spec

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@ -267,11 +267,9 @@ if(INCLUDE_WASM_SPEC_TESTS)
file(GLOB WASM_TESTS "${CMAKE_BINARY_DIR}/testsuite-master/*.wast") file(GLOB WASM_TESTS "${CMAKE_BINARY_DIR}/testsuite-master/*.wast")
foreach(PATH ${WASM_TESTS}) foreach(PATH ${WASM_TESTS})
get_filename_component(NAME ${PATH} NAME_WLE) get_filename_component(NAME ${PATH} NAME_WLE)
message(STATUS "Compiling WebAssembly test ${NAME}...") message(STATUS "Generating test cases for WebAssembly test ${NAME}...")
execute_process( execute_process(
COMMAND wasm-as -n ${PATH} -o "${WASM_SPEC_TEST_PATH}/${NAME}.wasm" COMMAND bash ${CMAKE_SOURCE_DIR}/Meta/generate-libwasm-spec-test.sh "${PATH}" "${CMAKE_SOURCE_DIR}/Userland/Libraries/LibWasm/Tests/Spec" "${NAME}" "${WASM_SPEC_TEST_PATH}")
OUTPUT_QUIET
ERROR_QUIET)
endforeach() endforeach()
file(REMOVE testsuite-master) file(REMOVE testsuite-master)
endif() endif()

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@ -0,0 +1,232 @@
#!/usr/bin/env python3
from sys import argv, stderr
from os import path
from string import whitespace
import re
import math
from tempfile import NamedTemporaryFile
from subprocess import call
import json
atom_end = set('()"' + whitespace)
def parse(sexp):
sexp = re.sub(r'(?m)\(;.*;\)', '', re.sub(r'(;;.*)', '', sexp))
stack, i, length = [[]], 0, len(sexp)
while i < length:
c = sexp[i]
kind = type(stack[-1])
if kind == list:
if c == '(':
stack.append([])
elif c == ')':
stack[-2].append(stack.pop())
elif c == '"':
stack.append('')
elif c in whitespace:
pass
else:
stack.append((c,))
elif kind == str:
if c == '"':
stack[-2].append(stack.pop())
elif c == '\\':
i += 1
stack[-1] += sexp[i]
else:
stack[-1] += c
elif kind == tuple:
if c in atom_end:
atom = stack.pop()
stack[-1].append(atom)
continue
else:
stack[-1] = ((stack[-1][0] + c),)
i += 1
return stack.pop()
def parse_typed_value(ast):
types = {
'i32.const': 'i32',
'i64.const': 'i64',
'f32.const': 'float',
'f64.const': 'double',
}
if len(ast) == 2 and ast[0][0] in types:
return {"type": types[ast[0][0]], "value": ast[1][0]}
return {"type": "error"}
def generate_module_source_for_compilation(entries):
s = '('
for entry in entries:
if type(entry) == tuple and len(entry) == 1 and type(entry[0]) == str:
s += entry[0] + ' '
elif type(entry) == str:
s += json.dumps(entry) + ' '
elif type(entry) == list:
s += generate_module_source_for_compilation(entry)
else:
raise Exception("wat? I dunno how to pretty print " + str(type(entry)))
while s.endswith(' '):
s = s[:len(s) - 1]
return s + ')'
def generate(ast):
if type(ast) != list:
return []
tests = []
for entry in ast:
if len(entry) > 0 and entry[0] == ('module',):
tests.append({
"module": generate_module_source_for_compilation(entry),
"tests": []
})
elif len(entry) in [2, 3] and entry[0][0].startswith('assert_'):
if entry[1][0] == ('invoke',):
tests[-1]["tests"].append({
"kind": entry[0][0][len('assert_'):],
"function": {
"name": entry[1][1],
"args": list(parse_typed_value(x) for x in entry[1][2:])
},
"result": parse_typed_value(entry[2]) if len(entry) == 3 else None
})
else:
print("Ignoring unknown assertion argument", entry[1][0], file=stderr)
elif len(entry) >= 2 and entry[0][0] == 'invoke':
# toplevel invoke :shrug:
tests[-1]["tests"].append({
"kind": "ignore",
"function": {
"name": entry[1][1],
"args": list(parse_typed_value(x) for x in entry[1][2:])
},
"result": parse_typed_value(entry[2]) if len(entry) == 3 else None
})
else:
print("Ignoring unknown entry", entry, file=stderr)
return tests
def genarg(spec):
if spec['type'] == 'error':
return '0'
def gen():
x = spec['value']
if x == 'nan':
return 'NaN'
if x == '-nan':
return '-NaN'
try:
x = float.fromhex(x)
if math.isnan(x):
# FIXME: This is going to mess up the different kinds of nan
return '-NaN' if math.copysign(1.0, x) < 0 else 'NaN'
if math.isinf(x):
return 'Infinity' if x > 0 else '-Infinity'
return str(x)
except ValueError:
try:
x = int(x, 0)
return str(x)
except ValueError:
return x
x = gen()
if x.startswith('nan'):
return 'NaN'
if x.startswith('-nan'):
return '-NaN'
return x
all_names_in_main = {}
def genresult(ident, entry):
if entry['kind'] == 'return':
return_check = f'expect({ident}_result).toBe({genarg(entry["result"])})' if entry["result"] is not None else ''
return (
f'let {ident}_result ='
f' module.invoke({ident}, {", ".join(genarg(x) for x in entry["function"]["args"])});\n '
f'{return_check};\n '
)
if entry['kind'] == 'trap':
return (
f'expect(() => module.invoke({ident}, {", ".join(genarg(x) for x in entry["function"]["args"])}))'
'.toThrow(TypeError, "Execution trapped");\n '
)
if entry['kind'] == 'ignore':
return f'module.invoke({ident}, {", ".join(genarg(x) for x in entry["function"]["args"])});\n '
return f'throw Exception("(Test Generator) Unknown test kind {entry["kind"]}");\n '
def gentest(entry, main_name):
name = entry["function"]["name"]
if type(name) != str:
print("Unsupported test case (call to", name, ")", file=stderr)
return '\n '
ident = '_' + re.sub("[^a-zA-Z_0-9]", "_", name)
count = all_names_in_main.get(name, 0)
all_names_in_main[name] = count + 1
test_name = f'execution of {main_name}: {name} (instance {count})'
source = (
f'test({json.dumps(test_name)}, () => {{\n'
f'let {ident} = module.getExport({json.dumps(name)});\n '
f'expect({ident}).not.toBeUndefined();\n '
f'{genresult(ident, entry)}'
'});\n\n '
)
return source
def gen_parse_module(name):
return (
f'let content;\n '
f'try {{\n '
f'content = readBinaryWasmFile("Fixtures/SpecTests/{name}.wasm");\n '
f'}} catch {{ read_okay = false; }}\n '
f'const module = parseWebAssemblyModule(content)\n '
)
def main():
with open(argv[1]) as f:
sexp = f.read()
name = argv[2]
module_output_path = argv[3]
ast = parse(sexp)
for index, description in enumerate(generate(ast)):
testname = f'{name}_{index}'
outpath = path.join(module_output_path, f'{testname}.wasm')
with NamedTemporaryFile("w+") as temp:
temp.write(description["module"])
temp.flush()
rc = call(["wasm-as", "-n", temp.name, "-o", outpath])
if rc != 0:
print("Failed to compile", name, "module index", index, "skipping that test", file=stderr)
continue
sep = ""
print(f'''{{
let readOkay = true;
{gen_parse_module(testname)}
if (readOkay) {{
{sep.join(gentest(x, testname) for x in description["tests"])}
}}}}
''')
if __name__ == "__main__":
main()

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@ -0,0 +1,16 @@
#!/usr/bin/env bash
if [ $# -ne 4 ]; then
echo "Usage: $0 <input spec file> <output path> <name> <module output path>"
exit 1
fi
INPUT_FILE="$1"
OUTPUT_PATH="$2"
NAME="$3"
MODULE_OUTPUT_PATH="$4"
mkdir -p "$OUTPUT_PATH"
mkdir -p "$MODULE_OUTPUT_PATH"
python3 "$(dirname "$0")/generate-libwasm-spec-test.py" "$INPUT_FILE" "$NAME" "$MODULE_OUTPUT_PATH" | prettier --stdin-filepath "test-$NAME.js" > "$OUTPUT_PATH/$NAME.js"

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@ -27,6 +27,36 @@ TESTJS_GLOBAL_FUNCTION(read_binary_wasm_file, readBinaryWasmFile)
return array; return array;
} }
class WebAssemblyModule final : public JS::Object {
JS_OBJECT(WebAssemblyModule, JS::Object);
public:
// FIXME: This should only contain an instantiated module, not the entire abstract machine!
explicit WebAssemblyModule(JS::Object& prototype)
: JS::Object(prototype)
{
}
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 = instance->m_machine.instantiate(*instance->m_module, {}); result.is_error())
global_object.vm().throw_exception<JS::TypeError>(global_object, result.release_error().error);
return instance;
}
void initialize(JS::GlobalObject&) override;
~WebAssemblyModule() override = default;
private:
JS_DECLARE_NATIVE_FUNCTION(get_export);
JS_DECLARE_NATIVE_FUNCTION(wasm_invoke);
Wasm::AbstractMachine m_machine;
Optional<Wasm::Module> m_module;
};
TESTJS_GLOBAL_FUNCTION(parse_webassembly_module, parseWebAssemblyModule) TESTJS_GLOBAL_FUNCTION(parse_webassembly_module, parseWebAssemblyModule)
{ {
auto object = vm.argument(0).to_object(global_object); auto object = vm.argument(0).to_object(global_object);
@ -43,9 +73,12 @@ TESTJS_GLOBAL_FUNCTION(parse_webassembly_module, parseWebAssemblyModule)
vm.throw_exception<JS::SyntaxError>(global_object, Wasm::parse_error_to_string(result.error())); vm.throw_exception<JS::SyntaxError>(global_object, Wasm::parse_error_to_string(result.error()));
return {}; return {};
} }
if (stream.handle_any_error())
return JS::js_undefined(); if (stream.handle_any_error()) {
return JS::js_null(); 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) TESTJS_GLOBAL_FUNCTION(compare_typed_arrays, compareTypedArrays)
@ -68,3 +101,112 @@ TESTJS_GLOBAL_FUNCTION(compare_typed_arrays, compareTypedArrays)
auto& rhs_array = static_cast<JS::TypedArrayBase&>(*rhs); auto& rhs_array = static_cast<JS::TypedArrayBase&>(*rhs);
return JS::Value(lhs_array.viewed_array_buffer()->buffer() == rhs_array.viewed_array_buffer()->buffer()); 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->m_machine.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 {};
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);
Wasm::FunctionAddress function_address { address };
auto function_instance = instance->m_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(static_cast<i32>(value)));
break;
case Wasm::ValueType::Kind::I64:
arguments.append(Wasm::Value(static_cast<i64>(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;
}
}
auto result = instance->m_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())); });
return return_value;
}