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ikos_import.cpp
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ikos_import.cpp
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/*******************************************************************************
*
* ikos-import -- Translate LLVM bitcode into AR
*
* Author: Maxime Arthaud
*
* Contact: [email protected]
*
* Notices:
*
* Copyright (c) 2011-2019 United States Government as represented by the
* Administrator of the National Aeronautics and Space Administration.
* All Rights Reserved.
*
* Disclaimers:
*
* No Warranty: THE SUBJECT SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF
* ANY KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT NOT LIMITED
* TO, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL CONFORM TO SPECIFICATIONS,
* ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
* OR FREEDOM FROM INFRINGEMENT, ANY WARRANTY THAT THE SUBJECT SOFTWARE WILL BE
* ERROR FREE, OR ANY WARRANTY THAT DOCUMENTATION, IF PROVIDED, WILL CONFORM TO
* THE SUBJECT SOFTWARE. THIS AGREEMENT DOES NOT, IN ANY MANNER, CONSTITUTE AN
* ENDORSEMENT BY GOVERNMENT AGENCY OR ANY PRIOR RECIPIENT OF ANY RESULTS,
* RESULTING DESIGNS, HARDWARE, SOFTWARE PRODUCTS OR ANY OTHER APPLICATIONS
* RESULTING FROM USE OF THE SUBJECT SOFTWARE. FURTHER, GOVERNMENT AGENCY
* DISCLAIMS ALL WARRANTIES AND LIABILITIES REGARDING THIRD-PARTY SOFTWARE,
* IF PRESENT IN THE ORIGINAL SOFTWARE, AND DISTRIBUTES IT "AS IS."
*
* Waiver and Indemnity: RECIPIENT AGREES TO WAIVE ANY AND ALL CLAIMS AGAINST
* THE UNITED STATES GOVERNMENT, ITS CONTRACTORS AND SUBCONTRACTORS, AS WELL
* AS ANY PRIOR RECIPIENT. IF RECIPIENT'S USE OF THE SUBJECT SOFTWARE RESULTS
* IN ANY LIABILITIES, DEMANDS, DAMAGES, EXPENSES OR LOSSES ARISING FROM SUCH
* USE, INCLUDING ANY DAMAGES FROM PRODUCTS BASED ON, OR RESULTING FROM,
* RECIPIENT'S USE OF THE SUBJECT SOFTWARE, RECIPIENT SHALL INDEMNIFY AND HOLD
* HARMLESS THE UNITED STATES GOVERNMENT, ITS CONTRACTORS AND SUBCONTRACTORS,
* AS WELL AS ANY PRIOR RECIPIENT, TO THE EXTENT PERMITTED BY LAW.
* RECIPIENT'S SOLE REMEDY FOR ANY SUCH MATTER SHALL BE THE IMMEDIATE,
* UNILATERAL TERMINATION OF THIS AGREEMENT.
*
******************************************************************************/
#include <iostream>
#include <boost/filesystem.hpp>
#include <boost/filesystem/fstream.hpp>
#include <llvm/IR/Verifier.h>
#include <llvm/IRReader/IRReader.h>
#include <llvm/Support/CommandLine.h>
#include <llvm/Support/Debug.h>
#include <llvm/Support/InitLLVM.h>
#include <llvm/Support/SourceMgr.h>
#include <llvm/Support/raw_ostream.h>
#include <ikos/ar/format/dot.hpp>
#include <ikos/ar/format/text.hpp>
#include <ikos/ar/pass/simplify_cfg.hpp>
#include <ikos/ar/verify/type.hpp>
#include <ikos/frontend/llvm/import.hpp>
namespace ar = ikos::ar;
namespace llvm_to_ar = ikos::frontend::import;
static llvm::cl::opt< std::string > InputFilename(
llvm::cl::Positional,
llvm::cl::desc("<input bitcode file>"),
llvm::cl::Required,
llvm::cl::value_desc("filename"));
static llvm::cl::opt< std::string > OutputFilename(
"o",
llvm::cl::desc("Override output filename"),
llvm::cl::value_desc("filename"));
static llvm::cl::opt< bool > NoVerify(
"no-verify", llvm::cl::desc("Do not run the LLVM bitcode verifier"));
static llvm::cl::opt< bool > NoLibIkos(
"no-libikos",
llvm::cl::desc("Do not use ikos intrinsics (__ikos_assert, etc.)"));
static llvm::cl::opt< bool > NoLibc(
"no-libc",
llvm::cl::desc("Do not use libc intrinsics (malloc, free, etc.)"));
static llvm::cl::opt< bool > NoLibcpp(
"no-libcpp",
llvm::cl::desc("Do not use libcpp intrinsics (__cxa_throw, etc.)"));
static llvm::cl::opt< bool > AllowDebugInfoMismatch(
"allow-dbg-mismatch",
llvm::cl::desc("Allow incorrect debug information in the module"));
static llvm::cl::opt< bool > NoTypeCheck(
"no-type-check", llvm::cl::desc("Do not run the AR type checker"));
static llvm::cl::opt< bool > NoSimplifyCFG(
"no-simplify-cfg", llvm::cl::desc("Do not run the simplify-cfg pass"));
enum OutputFormatType { None, Text, Dot };
static llvm::cl::opt< OutputFormatType > OutputFormat(
"format",
llvm::cl::desc("Output format:"),
llvm::cl::values(clEnumValN(None, "no", "Disable output"),
clEnumValN(Text, "text", "Text format"),
clEnumValN(Dot, "dot", "Dot format")),
llvm::cl::init(Text));
static llvm::cl::opt< bool > NoShowResultType(
"no-show-result-type",
llvm::cl::desc("Do not show the result type of statements"));
static llvm::cl::opt< bool > ShowOperandTypes(
"show-operand-types",
llvm::cl::desc("Show the operand types of statements"));
static llvm::cl::opt< bool > OrderGlobals(
"order-globals",
llvm::cl::desc("Order global variables and functions by name"));
/// \brief Build import options from command line arguments
static llvm_to_ar::Importer::ImportOptions make_import_options() {
llvm_to_ar::Importer::ImportOptions opts;
opts.set(llvm_to_ar::Importer::EnableLibIkos, !NoLibIkos);
opts.set(llvm_to_ar::Importer::EnableLibc, !NoLibc);
opts.set(llvm_to_ar::Importer::EnableLibcpp, !NoLibcpp);
opts.set(llvm_to_ar::Importer::AllowMismatchDebugInfo,
AllowDebugInfoMismatch);
return opts;
}
/// \brief Build format options from command line arguments
static ar::Formatter::FormatOptions make_format_options() {
ar::Formatter::FormatOptions opts;
opts.set(ar::Formatter::ShowResultType, !NoShowResultType);
opts.set(ar::Formatter::ShowOperandTypes, ShowOperandTypes);
opts.set(ar::Formatter::OrderGlobals, OrderGlobals);
return opts;
}
/// \brief Main for ikos-import
int main(int argc, char** argv) {
llvm::InitLLVM x(argc, argv);
// Program name
// NOLINTNEXTLINE(cppcoreguidelines-pro-bounds-pointer-arithmetic)
std::string progname = boost::filesystem::path(argv[0]).filename().string();
// Enable debug stream buffering
llvm::EnableDebugBuffering = true;
// LLVM context
llvm::LLVMContext llvm_context;
/*
* Parse parameters
*/
const char* overview = "ikos-import -- Translate LLVM bitcode into AR";
llvm::cl::ParseCommandLineOptions(argc, argv, overview);
try {
// Error diagnostic
llvm::SMDiagnostic err;
// Load the input module
std::unique_ptr< llvm::Module > module =
llvm::parseIRFile(InputFilename, err, llvm_context);
if (!module) {
err.print(progname.c_str(), llvm::errs());
return 1;
}
// Immediately run the verifier to catch any problems
if (!NoVerify && verifyModule(*module, &llvm::errs())) {
llvm::errs() << progname << ": " << InputFilename
<< ": error: input module is broken!\n";
return 2;
}
// Check for debug information
if (!llvm_to_ar::has_debug_info(*module)) {
// Warn but allow to proceed.
llvm::errs() << progname << ": " << InputFilename
<< ": warning: input module has no debug information\n";
llvm::errs() << "... Output may be less user friendly.\n";
}
// AR context
ar::Context ar_context;
// Translate LLVM bitcode into AR
ar::Bundle* bundle = nullptr;
try {
llvm_to_ar::Importer importer(ar_context);
bundle = importer.import(*module, make_import_options());
} catch (llvm_to_ar::ImportError& err) {
llvm::errs() << progname << ": " << InputFilename
<< ": error: " << err.what() << "\n";
return 3;
}
// Run type checker
ar::TypeVerifier verifier(/*all = */ true);
if (!NoTypeCheck && !verifier.verify(bundle, std::cerr)) {
llvm::errs() << progname << ": " << InputFilename
<< ": error: type checker\n";
return 4;
}
// Simplify the control flow graph
if (!NoSimplifyCFG) {
ar::SimplifyCFGPass().run(bundle);
}
// Generate output
if (OutputFormat == Text) {
ar::TextFormatter formatter(make_format_options());
if (OutputFilename.empty() || OutputFilename == "-") {
// Default to standard output
formatter.format(std::cout, bundle);
} else {
boost::filesystem::ofstream output(OutputFilename.getValue());
if (!output.is_open()) {
llvm::errs() << progname << ": " << OutputFilename << ": "
<< strerror(errno) << "\n";
return 5;
}
formatter.format(output, bundle);
}
} else if (OutputFormat == Dot) {
ar::DotFormatter formatter(make_format_options());
if (OutputFilename.empty()) {
// Default to current directory
OutputFilename = ".";
}
boost::system::error_code ec;
boost::filesystem::path output_dir(OutputFilename.getValue());
if (!boost::filesystem::exists(output_dir)) {
if (!boost::filesystem::create_directories(output_dir, ec)) {
llvm::errs() << progname << ": " << OutputFilename << ": "
<< ec.message() << "\n";
return 5;
}
}
if (!boost::filesystem::is_directory(output_dir, ec)) {
llvm::errs() << progname << ": " << OutputFilename
<< ": Not a directory\n";
return 5;
}
for (auto it = bundle->function_begin(), et = bundle->function_end();
it != et;
++it) {
ar::Function* fun = *it;
if (!fun->is_definition()) {
continue;
}
std::string filename = fun->name() + ".dot";
std::cout << "creating " << filename;
if (OutputFilename != ".") {
std::cout << " in directory " << OutputFilename;
}
std::cout << "\n";
boost::filesystem::ofstream output(output_dir / filename);
if (!output.is_open()) {
llvm::errs() << progname << ": " << OutputFilename << "/" << filename
<< ": " << strerror(errno) << "\n";
return 5;
}
formatter.format(output, fun);
}
}
return 0;
} catch (std::exception& err) {
llvm::errs() << progname << ": " << InputFilename
<< ": error: " << err.what() << "\n";
return 6;
}
}