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/*
* Copyright 2015 WebAssembly Community Group participants
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//
// asm2wasm console tool
//
#include "support/colors.h"
#include "support/command-line.h"
#include "support/file.h"
#include "wasm-printing.h"
#include "asm2wasm.h"
using namespace cashew;
using namespace wasm;
int main(int argc, const char *argv[]) {
bool opts = true;
bool imprecise = false;
Options options("asm2wasm", "Translate asm.js files to .wast files");
options
.add("--output", "-o", "Output file (stdout if not specified)",
Options::Arguments::One,
[](Options *o, const std::string &argument) {
o->extra["output"] = argument;
Colors::disable();
})
.add("--mapped-globals", "-m", "Mapped globals", Options::Arguments::One,
[](Options *o, const std::string &argument) {
o->extra["mapped globals"] = argument;
})
.add("--total-memory", "-m", "Total memory size", Options::Arguments::One,
[](Options *o, const std::string &argument) {
o->extra["total memory"] = argument;
})
.add("--no-opts", "-n", "Disable optimization passes", Options::Arguments::Zero,
[&opts](Options *o, const std::string &) {
opts = false;
})
.add("--imprecise", "-i", "Imprecise optimizations", Options::Arguments::Zero,
[&imprecise](Options *o, const std::string &) {
imprecise = true;
})
.add_positional("INFILE", Options::Arguments::One,
[](Options *o, const std::string &argument) {
o->extra["infile"] = argument;
});
options.parse(argc, argv);
const auto &mg_it = options.extra.find("mapped globals");
const char *mappedGlobals =
mg_it == options.extra.end() ? nullptr : mg_it->second.c_str();
const auto &tm_it = options.extra.find("total memory");
size_t totalMemory =
tm_it == options.extra.end() ? 16 * 1024 * 1024 : atoi(tm_it->second.c_str());
if (totalMemory & ~Memory::kPageMask) {
std::cerr << "Error: total memory size " << totalMemory <<
" is not a multiple of the 64k wasm page size\n";
exit(EXIT_FAILURE);
}
Asm2WasmPreProcessor pre;
auto input(
read_file<std::vector<char>>(options.extra["infile"], Flags::Text, options.debug ? Flags::Debug : Flags::Release));
char *start = pre.process(input.data());
if (options.debug) std::cerr << "parsing..." << std::endl;
cashew::Parser<Ref, DotZeroValueBuilder> builder;
Ref asmjs = builder.parseToplevel(start);
if (options.debug) {
std::cerr << "parsed:" << std::endl;
asmjs->stringify(std::cerr, true);
std::cerr << std::endl;
}
if (options.debug) std::cerr << "wasming..." << std::endl;
Module wasm;
wasm.memory.initial = wasm.memory.max = totalMemory / Memory::kPageSize;
Asm2WasmBuilder asm2wasm(wasm, pre.memoryGrowth, options.debug, imprecise);
asm2wasm.processAsm(asmjs);
if (opts) {
if (options.debug) std::cerr << "optimizing..." << std::endl;
asm2wasm.optimize();
}
if (options.debug) std::cerr << "printing..." << std::endl;
Output output(options.extra["output"], Flags::Text, options.debug ? Flags::Debug : Flags::Release);
WasmPrinter::printModule(&wasm, output.getStream());
if (mappedGlobals) {
if (options.debug)
std::cerr << "serializing mapped globals..." << std::endl;
asm2wasm.serializeMappedGlobals(mappedGlobals);
}
if (options.debug) std::cerr << "done." << std::endl;
}
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