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/*
* Copyright 2017 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.
*/
//
// wasm-emscripten-finalize console tool
// Performs Emscripten-specific transforms on .wasm files
//
#include <exception>
#include "ir/trapping.h"
#include "support/colors.h"
#include "support/command-line.h"
#include "support/file.h"
#include "wasm-binary.h"
#include "wasm-emscripten.h"
#include "wasm-io.h"
#include "wasm-printing.h"
#include "wasm-validator.h"
using namespace cashew;
using namespace wasm;
int main(int argc, const char *argv[]) {
std::string infile;
std::string outfile;
std::string inputSourceMapFilename;
std::string outputSourceMapFilename;
std::string outputSourceMapUrl;
bool emitBinary = true;
bool debugInfo = false;
unsigned numReservedFunctionPointers = 0;
uint64_t globalBase;
Options options("wasm-emscripten-finalize",
"Performs Emscripten-specific transforms on .wasm files");
options
.add("--output", "-o", "Output file",
Options::Arguments::One,
[&outfile](Options*, const std::string& argument) {
outfile = argument;
Colors::disable();
})
.add("--debuginfo", "-g",
"Emit names section in wasm binary (or full debuginfo in wast)",
Options::Arguments::Zero,
[&debugInfo](Options *, const std::string &) {
debugInfo = true;
})
.add("--emit-text", "-S", "Emit text instead of binary for the output file",
Options::Arguments::Zero,
[&emitBinary](Options*, const std::string& ) {
emitBinary = false;
})
.add("--emscripten-reserved-function-pointers", "",
"Number of reserved function pointers for emscripten addFunction "
"support",
Options::Arguments::One,
[&numReservedFunctionPointers](Options *,
const std::string &argument) {
numReservedFunctionPointers = std::stoi(argument);
})
.add("--global-base", "", "Where lld started to place globals",
Options::Arguments::One,
[&globalBase](Options*, const std::string&argument ) {
globalBase = std::stoull(argument);
})
.add("--input-source-map", "-ism", "Consume source map from the specified file",
Options::Arguments::One,
[&inputSourceMapFilename](Options *o, const std::string& argument) { inputSourceMapFilename = argument; })
.add("--output-source-map", "-osm", "Emit source map to the specified file",
Options::Arguments::One,
[&outputSourceMapFilename](Options *o, const std::string& argument) { outputSourceMapFilename = argument; })
.add("--output-source-map-url", "-osu", "Emit specified string as source map URL",
Options::Arguments::One,
[&outputSourceMapUrl](Options *o, const std::string& argument) { outputSourceMapUrl = argument; })
.add_positional("INFILE", Options::Arguments::One,
[&infile](Options *o, const std::string& argument) {
infile = argument;
});
options.parse(argc, argv);
if (infile == "") {
Fatal() << "Need to specify an infile\n";
}
if (outfile == "" && emitBinary) {
Fatal() << "Need to specify an outfile, or use text output\n";
}
Module wasm;
ModuleReader reader;
try {
reader.read(infile, wasm, inputSourceMapFilename);
} catch (ParseException& p) {
p.dump(std::cerr);
std::cerr << '\n';
Fatal() << "error in parsing input";
} catch (MapParseException& p) {
p.dump(std::cerr);
std::cerr << '\n';
Fatal() << "error in parsing wasm source map";
}
if (options.debug) {
std::cerr << "Module before:\n";
WasmPrinter::printModule(&wasm, std::cerr);
}
Export* dataEndExport = wasm.getExport("__data_end");
if (dataEndExport == nullptr) {
Fatal() << "__data_end export not found";
}
Global* dataEnd = wasm.getGlobal(dataEndExport->value);
if (dataEnd == nullptr) {
Fatal() << "__data_end global not found";
}
if (dataEnd->type != Type::i32) {
Fatal() << "__data_end global has wrong type";
}
Const* dataEndConst = dataEnd->init->cast<Const>();
uint32_t dataSize = dataEndConst->value.geti32() - globalBase;
std::vector<Name> initializerFunctions;
if (wasm.getFunctionOrNull("__wasm_call_ctors")) {
initializerFunctions.push_back("__wasm_call_ctors");
}
EmscriptenGlueGenerator generator(wasm);
generator.fixInvokeFunctionNames();
generator.generateRuntimeFunctions();
generator.generateMemoryGrowthFunction();
generator.generateDynCallThunks();
generator.generateJSCallThunks(numReservedFunctionPointers);
std::string metadata = generator.generateEmscriptenMetadata(dataSize, initializerFunctions, numReservedFunctionPointers);
if (options.debug) {
std::cerr << "Module after:\n";
WasmPrinter::printModule(&wasm, std::cerr);
}
auto outputBinaryFlag = emitBinary ? Flags::Binary : Flags::Text;
Output output(outfile, outputBinaryFlag, Flags::Release);
ModuleWriter writer;
writer.setDebug(options.debug);
writer.setDebugInfo(debugInfo);
// writer.setSymbolMap(symbolMap);
writer.setBinary(emitBinary);
if (outputSourceMapFilename.size()) {
writer.setSourceMapFilename(outputSourceMapFilename);
writer.setSourceMapUrl(outputSourceMapUrl);
}
writer.write(wasm, output);
if (emitBinary) {
std::cout << metadata;
} else {
output << ";; METADATA: " << metadata;
}
return 0;
}
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