mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-07-07 09:56:35 +03:00
404 lines
11 KiB
Python
404 lines
11 KiB
Python
import json
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import math
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import sys
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import struct
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import subprocess
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from dataclasses import dataclass
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from pathlib import Path
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from typing import Union, Literal, Any
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class ParseException(Exception):
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pass
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class GenerateException(Exception):
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pass
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@dataclass
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class WasmValue:
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kind: Literal["i32", "i64", "f32", "f64", "externref", "funcref", "v128"]
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value: str
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@dataclass
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class ModuleCommand:
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line: int
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file_name: Path
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name: str | None
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@dataclass
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class Invoke:
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field: str
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args: list[WasmValue]
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module: str | None
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@dataclass
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class Get:
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field: str
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module: str | None
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Action = Union[Invoke, Get]
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@dataclass
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class Register:
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line: int
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name: str | None
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as_: str
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@dataclass
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class AssertReturn:
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line: int
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action: Action
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expected: WasmValue | None
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@dataclass
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class AssertTrap:
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line: int
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messsage: str
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action: Action
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@dataclass
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class ActionCommand:
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line: int
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action: Action
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@dataclass
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class AssertInvalid:
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line: int
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filename: str
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message: str
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Command = Union[
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ModuleCommand,
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AssertReturn,
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AssertTrap,
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ActionCommand,
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AssertInvalid,
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Register,
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]
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@dataclass
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class WastDescription:
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source_filename: str
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commands: list[Command]
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@dataclass
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class Context:
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current_module_name: str
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has_unclosed: bool
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def parse_value(arg: dict[str, str]) -> WasmValue:
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type_ = arg["type"]
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match type_:
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case "i32" | "i64" | "f32" | "f64" | "externref" | "funcref":
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payload = arg["value"]
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case "v128":
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def reverse_endianness(hex_str):
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if len(hex_str) % 2 != 0:
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hex_str = "0" + hex_str
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bytes_list = [hex_str[i:i + 2] for i in range(0, len(hex_str), 2)]
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reversed_hex_str = "".join(bytes_list[::-1])
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return reversed_hex_str
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size = int(arg["lane_type"][1:]) // 4
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parts = []
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for raw_val in arg["value"]:
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match raw_val:
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case "nan:canonical":
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hex_repr = "7fc".ljust(size, "0")
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case "nan:arithmetic":
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hex_repr = "7ff".ljust(size, "0")
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case "nan:signaling":
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hex_repr = "7ff8".ljust(size, "0")
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case _:
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hex_repr = hex(int(raw_val))[2:].zfill(size)
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parts.append(hex_repr)
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payload = "0x" + reverse_endianness("".join(reversed(parts))) + "n"
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case _:
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raise ParseException(f"Unknown value type: {type_}")
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return WasmValue(type_, payload)
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def parse_args(raw_args: list[dict[str, str]]) -> list[WasmValue]:
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return [parse_value(arg) for arg in raw_args]
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def parse_action(action: dict[str, Any]) -> Action:
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match action["type"]:
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case "invoke":
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return Invoke(
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action["field"], parse_args(action["args"]), action.get("module")
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)
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case "get":
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return Get(action["field"], action.get("module"))
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case _:
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raise ParseException(f"Action not implemented: {action['type']}")
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def parse(raw: dict[str, Any]) -> WastDescription:
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commands: list[Command] = []
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for raw_cmd in raw["commands"]:
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line = raw_cmd["line"]
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cmd: Command
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match raw_cmd["type"]:
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case "module":
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cmd = ModuleCommand(
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line, Path(raw_cmd["filename"]), raw_cmd.get("name")
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)
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case "action":
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cmd = ActionCommand(line, parse_action(raw_cmd["action"]))
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case "register":
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cmd = Register(line, raw_cmd.get("name"), raw_cmd["as"])
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case "assert_return":
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cmd = AssertReturn(
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line,
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parse_action(raw_cmd["action"]),
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parse_value(raw_cmd["expected"][0])
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if len(raw_cmd["expected"]) == 1
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else None,
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)
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case "assert_trap" | "assert_exhaustion":
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cmd = AssertTrap(line, raw_cmd["text"], parse_action(raw_cmd["action"]))
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case "assert_invalid" | "assert_malformed" | "assert_uninstantiable" | "assert_unlinkable":
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if raw_cmd.get("module_type") == "text":
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continue
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cmd = AssertInvalid(line, raw_cmd["filename"], raw_cmd["text"])
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case _:
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raise ParseException(f"Unknown command type: {raw_cmd['type']}")
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commands.append(cmd)
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return WastDescription(raw["source_filename"], commands)
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def escape(s: str) -> str:
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return s.replace('"', '\\"')
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def make_description(input_path: Path, name: str, out_path: Path) -> WastDescription:
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out_json_path = out_path / f"{name}.json"
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result = subprocess.run(
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["wast2json", input_path, f"--output={out_json_path}", "--no-check"],
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)
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result.check_returncode()
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with open(out_json_path, "r") as f:
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description = json.load(f)
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return parse(description)
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def gen_value(value: WasmValue) -> str:
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def unsigned_to_signed(uint: int, bits: int) -> int:
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max_value = 2**bits
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if uint >= 2 ** (bits - 1):
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signed_int = uint - max_value
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else:
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signed_int = uint
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return signed_int
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def int_to_float_bitcast(uint: int) -> float:
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b = struct.pack("I", uint)
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f = struct.unpack("f", b)[0]
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return f
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def int_to_float64_bitcast(uint: int) -> float:
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uint64 = uint & 0xFFFFFFFFFFFFFFFF
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b = struct.pack("Q", uint64)
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f = struct.unpack("d", b)[0]
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return f
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def float_to_str(f: float) -> str:
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if math.isnan(f) and math.copysign(1.0, f) < 0:
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return "-NaN"
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elif math.isnan(f):
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return "NaN"
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elif math.isinf(f) and math.copysign(1.0, f) < 0:
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return "-Infinity"
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elif math.isinf(f):
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return "Infinity"
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return str(f)
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if value.value.startswith("nan"):
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return "NaN"
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elif value.value.startswith("-nan"):
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return "-NaN"
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elif value.value == "inf":
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return "Infinity"
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elif value.value == "-inf":
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return "-Infinity"
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match value.kind:
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case "i32":
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return str(unsigned_to_signed(int(value.value), 32))
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case "i64":
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return str(unsigned_to_signed(int(value.value), 64)) + "n"
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case "f32":
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return float_to_str(int_to_float_bitcast(int(value.value)))
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case "f64":
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return float_to_str(int_to_float64_bitcast(int(value.value)))
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case "externref" | "funcref" | "v128":
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return value.value
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case _:
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raise GenerateException(f"Not implemented: {value.kind}")
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def gen_args(args: list[WasmValue]) -> str:
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return ",".join(gen_value(arg) for arg in args)
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def gen_module_command(command: ModuleCommand, ctx: Context):
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if ctx.has_unclosed:
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print("});")
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print(
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f"""describe("{command.file_name.stem}", () => {{
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let _test = test;
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let content, module;
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try {{
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content = readBinaryWasmFile("Fixtures/SpecTests/{command.file_name}");
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module = parseWebAssemblyModule(content, globalImportObject);
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}} catch (e) {{
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_test("parse", () => expect().fail(e));
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_test = test.skip;
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_test.skip = test.skip;
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}}
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"""
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)
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if command.name is not None:
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print(f'namedModules["{command.name}"] = module;')
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ctx.current_module_name = command.file_name.stem
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ctx.has_unclosed = True
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def gen_invalid(invalid: AssertInvalid, ctx: Context):
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if ctx.has_unclosed:
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print("});")
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ctx.has_unclosed = False
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stem = Path(invalid.filename).stem
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print(
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f"""
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describe("{stem}", () => {{
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let _test = test;
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_test("parse of {stem} (line {invalid.line})", () => {{
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content = readBinaryWasmFile("Fixtures/SpecTests/{invalid.filename}");
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expect(() => parseWebAssemblyModule(content, globalImportObject)).toThrow(Error, "{invalid.message}");
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}});
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}});"""
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)
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def gen_invoke(
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line: int,
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invoke: Invoke,
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result: WasmValue | None,
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ctx: Context,
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*,
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fail_msg: str | None = None,
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):
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module = "module"
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if invoke.module is not None:
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module = f'namedModules["{invoke.module}"]'
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print(
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f"""_test("execution of {ctx.current_module_name}: {escape(invoke.field)} (line {line})", () => {{
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let _field = {module}.getExport("{escape(invoke.field)}");
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expect(_field).not.toBeUndefined();"""
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)
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if fail_msg is not None:
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print(f'expect(() => {module}.invoke(_field)).toThrow(Error, "{fail_msg}");')
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else:
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print(f"let _result = {module}.invoke(_field, {gen_args(invoke.args)});")
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if result is not None:
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print(f"expect(_result).toBe({gen_value(result)});")
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print("});")
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def gen_get(line: int, get: Get, result: WasmValue | None, ctx: Context):
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module = "module"
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if get.module is not None:
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module = f'namedModules["{get.module}"]'
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print(
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f"""_test("execution of {ctx.current_module_name}: get-{get.field} (line {line})", () => {{
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let _field = {module}.getExport("{get.field}");"""
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)
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if result is not None:
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print(f"expect(_field).toBe({gen_value(result)});")
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print("});")
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def gen_register(register: Register, _: Context):
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module = "module"
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if register.name is not None:
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module = f'namedModules["{register.name}"]'
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print(f'globalImportObject["{register.as_}"] = {module};')
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def gen_command(command: Command, ctx: Context):
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match command:
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case ModuleCommand():
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gen_module_command(command, ctx)
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case ActionCommand():
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if isinstance(command.action, Invoke):
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gen_invoke(command.line, command.action, None, ctx)
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else:
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raise GenerateException(
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f"Not implemented: top-level {type(command.action)}"
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)
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case AssertInvalid():
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gen_invalid(command, ctx)
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case Register():
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gen_register(command, ctx)
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case AssertReturn():
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match command.action:
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case Invoke():
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gen_invoke(command.line, command.action, command.expected, ctx)
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case Get():
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gen_get(command.line, command.action, command.expected, ctx)
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case AssertTrap():
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if not isinstance(command.action, Invoke):
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raise GenerateException(f"Not implemented: {type(command.action)}")
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gen_invoke(
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command.line, command.action, None, ctx, fail_msg=command.messsage
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)
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def generate(description: WastDescription):
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print("let globalImportObject = {};\nlet namedModules = {};\n")
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ctx = Context("", False)
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for command in description.commands:
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gen_command(command, ctx)
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if ctx.has_unclosed:
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print("});")
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def clean_up(path: Path):
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for file in path.iterdir():
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if file.suffix in ("wat", "json"):
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file.unlink()
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def main():
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input_path = Path(sys.argv[1])
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name = sys.argv[2]
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out_path = Path(sys.argv[3])
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description = make_description(input_path, name, out_path)
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generate(description)
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clean_up(out_path)
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if __name__ == "__main__":
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main()
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