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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.
*/
//
// s2wasm console tool
//
#include <exception>
#include "ir/trapping.h"
#include "support/colors.h"
#include "support/command-line.h"
#include "support/file.h"
#include "s2wasm.h"
#include "wasm-emscripten.h"
#include "wasm-linker.h"
#include "wasm-printing.h"
#include "wasm-validator.h"
using namespace cashew;
using namespace wasm;
int main(int argc, const char *argv[]) {
bool ignoreUnknownSymbols = false;
bool generateEmscriptenGlue = false;
bool allowMemoryGrowth = false;
bool importMemory = false;
std::string startFunction;
std::vector<std::string> archiveLibraries;
TrapMode trapMode = TrapMode::Allow;
Options options("s2wasm", "Link .s file into .wast");
options.extra["validate"] = "wasm";
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("--ignore-unknown", "", "Ignore unknown symbols",
Options::Arguments::Zero,
[&ignoreUnknownSymbols](Options *, const std::string &) {
ignoreUnknownSymbols = true;
})
.add("--start", "", "Generate the start method (default: main)",
Options::Arguments::Optional,
[&startFunction](Options *, const std::string &argument) {
startFunction = argument.size() ? argument : "main";
})
.add("--global-base", "-g", "Where to start to place globals",
Options::Arguments::One,
[](Options *o, const std::string &argument) {
o->extra["global-base"] = argument;
})
.add("--allocate-stack", "-s", "Size of the user stack in linear memory",
Options::Arguments::One,
[](Options *o, const std::string &argument) {
o->extra["stack-allocation"] = argument;
})
.add("--initial-memory", "-i", "Initial size of the linear memory",
Options::Arguments::One,
[](Options *o, const std::string &argument) {
o->extra["initial-memory"] = argument;
})
.add("--max-memory", "-m", "Maximum size of the linear memory",
Options::Arguments::One,
[](Options *o, const std::string &argument) {
o->extra["max-memory"] = argument;
})
.add("--allow-memory-growth", "", "Allow linear memory to grow at runtime",
Options::Arguments::Zero,
[&allowMemoryGrowth](Options *, const std::string &) {
allowMemoryGrowth = true;
})
.add("--trap-mode", "",
"Strategy for handling potentially trapping instructions. Valid "
"values are \"allow\", \"js\", and \"clamp\"",
Options::Arguments::One,
[&trapMode](Options *o, const std::string &argument) {
try {
trapMode = trapModeFromString(argument);
} catch (std::invalid_argument e) {
std::cerr << "Error: " << e.what() << "\n";
exit(EXIT_FAILURE);
}
})
.add("--emscripten-glue", "-e", "Generate emscripten glue",
Options::Arguments::Zero,
[&generateEmscriptenGlue](Options *, const std::string &) {
generateEmscriptenGlue = true;
})
.add("--import-memory", "", "Import the linear memory instead of exporting it",
Options::Arguments::Zero,
[&importMemory](Options *, const std::string &) {
importMemory = true;
})
.add("--library", "-l", "Add archive library",
Options::Arguments::N,
[&archiveLibraries](Options *o, const std::string &argument) {
archiveLibraries.push_back(argument);
})
.add("--validate", "-v", "Control validation of the output module",
Options::Arguments::One,
[](Options *o, const std::string &argument) {
if (argument != "web" && argument != "none" && argument != "wasm") {
std::cerr << "Valid arguments for --validate flag are 'wasm', 'web' and 'none'.\n";
exit(1);
}
o->extra["validate"] = argument;
})
.add_positional("INFILE", Options::Arguments::One,
[](Options *o, const std::string &argument) {
o->extra["infile"] = argument;
});
options.parse(argc, argv);
if (allowMemoryGrowth && !generateEmscriptenGlue) {
Fatal() << "Error: adding memory growth code without Emscripten glue. "
"This doesn't do anything.\n";
}
auto debugFlag = options.debug ? Flags::Debug : Flags::Release;
auto input(read_file<std::string>(options.extra["infile"], Flags::Text, debugFlag));
if (options.debug) std::cerr << "Parsing and wasming..." << std::endl;
uint64_t globalBase = options.extra.find("global-base") != options.extra.end()
? std::stoull(options.extra["global-base"])
: 0;
uint64_t stackAllocation =
options.extra.find("stack-allocation") != options.extra.end()
? std::stoull(options.extra["stack-allocation"])
: 0;
uint64_t initialMem =
options.extra.find("initial-memory") != options.extra.end()
? std::stoull(options.extra["initial-memory"])
: 0;
uint64_t maxMem =
options.extra.find("max-memory") != options.extra.end()
? std::stoull(options.extra["max-memory"])
: 0;
if (options.debug) std::cerr << "Global base " << globalBase << '\n';
Linker linker(globalBase, stackAllocation, initialMem, maxMem,
importMemory || generateEmscriptenGlue, ignoreUnknownSymbols, startFunction,
options.debug);
S2WasmBuilder mainbuilder(input.c_str(), options.debug);
linker.linkObject(mainbuilder);
if (trapMode != TrapMode::Allow) {
Module* wasm = &(linker.getOutput().wasm);
PassRunner runner(wasm);
addTrapModePass(runner, trapMode);
runner.run();
}
for (const auto& m : archiveLibraries) {
auto archiveFile(read_file<std::vector<char>>(m, Flags::Binary, debugFlag));
bool error;
Archive lib(archiveFile, error);
if (error) Fatal() << "Error opening archive " << m << "\n";
linker.linkArchive(lib);
}
linker.layout();
std::string metadata;
if (generateEmscriptenGlue) {
Module& wasm = linker.getOutput().wasm;
if (options.debug) {
std::cerr << "Emscripten gluing..." << std::endl;
WasmPrinter::printModule(&wasm, std::cerr);
}
metadata = ";; METADATA: " + emscriptenGlue(
wasm,
allowMemoryGrowth,
linker.getStackPointerAddress(),
linker.getStaticBump(),
linker.getOutput().getInitializerFunctions());
}
if (options.extra["validate"] != "none") {
if (options.debug) std::cerr << "Validating..." << std::endl;
Module* output = &linker.getOutput().wasm;
if (!wasm::WasmValidator().validate(*output,
WasmValidator::Globally | (options.extra["validate"] == "web" ? WasmValidator::Web : 0))) {
WasmPrinter::printModule(output);
Fatal() << "Error: linked module is not valid.\n";
}
}
if (options.debug) std::cerr << "Printing..." << std::endl;
Output output(options.extra["output"], Flags::Text, options.debug ? Flags::Debug : Flags::Release);
WasmPrinter::printModule(&linker.getOutput().wasm, output.getStream());
output << metadata;
if (options.debug) std::cerr << "Done." << std::endl;
return 0;
}
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