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#!/usr/bin/env python
# Copyright (C) 2016 Apple Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# This tool has a couple of helpful macros to process Wasm files from the wasm.json.
from generateWasm import *
import optparse
import sys
parser = optparse.OptionParser(usage="usage: %prog <wasm.json> <WasmOps.h>")
(options, args) = parser.parse_args(sys.argv[0:])
if len(args) != 3:
parser.error(parser.usage)
wasm = Wasm(args[0], args[1])
opcodes = wasm.opcodes
wasmValidateInlinesHFile = open(args[2], "w")
def cppType(name):
result = {
"bool": "I32",
"addr": "I32",
"i32": "I32",
"i64": "I64",
"f32": "F32",
"f64": "F64",
}.get(name, None)
if result == None:
raise ValueError("Unknown type name: " + name)
return result
def toCpp(name):
return wasm.toCpp(name)
def unaryMacro(name):
op = opcodes[name]
return """
template<> auto Validate::addOp<OpType::""" + toCpp(name) + """>(ExpressionType value, ExpressionType& result) -> Result
{
if (UNLIKELY(value != """ + cppType(op["parameter"][0]) + """))
return UnexpectedType<Result::ErrorType>("validation failed: """ + name + """ value type mismatch");
result = """ + cppType(op["return"][0]) + """;
return { };
}
"""
def binaryMacro(name):
op = opcodes[name]
return """
template<> auto Validate::addOp<OpType::""" + toCpp(name) + """>(ExpressionType left, ExpressionType right, ExpressionType& result) -> Result
{
if (UNLIKELY(left != """ + cppType(op["parameter"][0]) + """))
return UnexpectedType<Result::ErrorType>("validation failed: """ + name + """ left value type mismatch");
if (UNLIKELY(right != """ + cppType(op["parameter"][1]) + """))
return UnexpectedType<Result::ErrorType>("validation failed: """ + name + """ right value type mismatch");
result = """ + cppType(op["return"][0]) + """;
return { };
}
"""
def loadMacro(name):
op = opcodes[name]
return """
case LoadOpType::""" + toCpp(name) + """: {
if (UNLIKELY(pointer != """ + cppType(op["parameter"][0]) + """))
return UnexpectedType<Result::ErrorType>("validation failed: """ + name + """ pointer type mismatch");
result = """ + cppType(op["return"][0]) + """;
return { };
}"""
def storeMacro(name):
op = opcodes[name]
return """
case StoreOpType::""" + toCpp(name) + """: {
if (UNLIKELY(pointer != """ + cppType(op["parameter"][0]) + """))
return UnexpectedType<Result::ErrorType>("validation failed: """ + name + """ pointer type mismatch");
if (UNLIKELY(value != """ + cppType(op["parameter"][1]) + """))
return UnexpectedType<Result::ErrorType>("validation failed: """ + name + """ value type mismatch");
return { };
}"""
unarySpecializations = "".join([op for op in wasm.opcodeIterator(isUnary, unaryMacro)])
binarySpecializations = "".join([op for op in wasm.opcodeIterator(isBinary, binaryMacro)])
loadCases = "".join([op for op in wasm.opcodeIterator(lambda op: op["category"] == "memory" and len(op["return"]) == 1, loadMacro)])
storeCases = "".join([op for op in wasm.opcodeIterator(lambda op: op["category"] == "memory" and len(op["return"]) == 0, storeMacro)])
contents = wasm.header + """
// This file is intended to be inlined by WasmValidate.cpp only! It should not be included elsewhere.
#pragma once
#if ENABLE(WEBASSEMBLY)
#include <wtf/StdLibExtras.h>
#if COMPILER(GCC) && ASSERT_DISABLED
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wreturn-type"
#endif // COMPILER(GCC) && ASSERT_DISABLED
namespace JSC { namespace Wasm {
""" + unarySpecializations + binarySpecializations + """
auto Validate::load(LoadOpType op, ExpressionType pointer, ExpressionType& result, uint32_t) -> Result
{
if (UNLIKELY(!hasMemory()))
return UnexpectedType<Result::ErrorType>("validation failed: load instruction without memory");
switch (op) {
""" + loadCases + """
}
}
auto Validate::store(StoreOpType op, ExpressionType pointer, ExpressionType value, uint32_t) -> Result
{
if (UNLIKELY(!hasMemory()))
return UnexpectedType<Result::ErrorType>("validation failed: store instruction without memory");
switch (op) {
""" + storeCases + """
}
}
} } // namespace JSC::Wasm
#if COMPILER(GCC) && ASSERT_DISABLED
#pragma GCC diagnostic pop
#endif // COMPILER(GCC) && ASSERT_DISABLED
#endif // ENABLE(WEBASSEMBLY)
"""
wasmValidateInlinesHFile.write(contents)
wasmValidateInlinesHFile.close()
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