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/*
* Copyright 2019 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.
*/
#include <cassert>
#include <cinttypes>
#include <cstdio>
#include <cstdlib>
#include "wabt/apply-names.h"
#include "wabt/binary-reader-ir.h"
#include "wabt/binary-reader.h"
#include "wabt/decompiler.h"
#include "wabt/error-formatter.h"
#include "wabt/feature.h"
#include "wabt/generate-names.h"
#include "wabt/ir.h"
#include "wabt/option-parser.h"
#include "wabt/stream.h"
#include "wabt/validator.h"
#include "wabt/wast-lexer.h"
using namespace wabt;
int ProgramMain(int argc, char** argv) {
InitStdio();
std::string infile;
std::string outfile;
Features features;
DecompileOptions decompile_options;
bool fail_on_custom_section_error = true;
{
const char s_description[] =
" Read a file in the WebAssembly binary format, and convert it to\n"
" a decompiled text file.\n"
"\n"
"examples:\n"
" # parse binary file test.wasm and write text file test.dcmp\n"
" $ wasm-decompile test.wasm -o test.dcmp\n";
OptionParser parser("wasm-decompile", s_description);
parser.AddOption(
'o', "output", "FILENAME",
"Output file for the decompiled file, by default use stdout",
[&](const char* argument) {
outfile = argument;
ConvertBackslashToSlash(&outfile);
});
features.AddOptions(&parser);
parser.AddOption("ignore-custom-section-errors",
"Ignore errors in custom sections",
[&]() { fail_on_custom_section_error = false; });
parser.AddArgument("filename", OptionParser::ArgumentCount::One,
[&](const char* argument) {
infile = argument;
ConvertBackslashToSlash(&infile);
});
parser.Parse(argc, argv);
}
std::vector<uint8_t> file_data;
Result result = ReadFile(infile.c_str(), &file_data);
if (Succeeded(result)) {
Errors errors;
Module module;
const bool kStopOnFirstError = true;
ReadBinaryOptions options(features, nullptr, true, kStopOnFirstError,
fail_on_custom_section_error);
result = ReadBinaryIr(infile.c_str(), file_data.data(), file_data.size(),
options, &errors, &module);
if (Succeeded(result)) {
ValidateOptions options(features);
result = ValidateModule(&module, &errors, options);
if (Succeeded(result)) {
result =
GenerateNames(&module, static_cast<NameOpts>(NameOpts::AlphaNames));
}
if (Succeeded(result)) {
// Must be called after ReadBinaryIr & GenerateNames, and before
// ApplyNames, see comments at definition.
RenameAll(module);
}
if (Succeeded(result)) {
/* TODO(binji): This shouldn't fail; if a name can't be applied
* (because the index is invalid, say) it should just be skipped. */
Result dummy_result = ApplyNames(&module);
WABT_USE(dummy_result);
}
if (Succeeded(result)) {
auto s = Decompile(module, decompile_options);
FileStream stream(!outfile.empty() ? FileStream(outfile)
: FileStream(stdout));
stream.WriteData(s.data(), s.size());
}
}
FormatErrorsToFile(errors, Location::Type::Binary);
}
return result != Result::Ok;
}
int main(int argc, char** argv) {
WABT_TRY
return ProgramMain(argc, argv);
WABT_CATCH_BAD_ALLOC_AND_EXIT
}
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