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ikos_analyzer.cpp
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ikos_analyzer.cpp
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/*******************************************************************************
*
* ikos-analyzer -- IKOS static analyzer
*
* This is the entry point for all analyses.
*
* Authors: 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/algorithm/string.hpp>
#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/Process.h>
#include <llvm/Support/SourceMgr.h>
#include <llvm/Support/WithColor.h>
#include <llvm/Support/raw_ostream.h>
#include <ikos/ar/format/dot.hpp>
#include <ikos/ar/format/formatter.hpp>
#include <ikos/ar/format/text.hpp>
#include <ikos/ar/pass/add_loop_counters.hpp>
#include <ikos/ar/pass/add_partitioning_variables.hpp>
#include <ikos/ar/pass/name_values.hpp>
#include <ikos/ar/pass/simplify_cfg.hpp>
#include <ikos/ar/pass/simplify_upcast_comparison.hpp>
#include <ikos/ar/verify/frontend.hpp>
#include <ikos/ar/verify/type.hpp>
#include <ikos/frontend/llvm/import.hpp>
#include <ikos/analyzer/analysis/call_context.hpp>
#include <ikos/analyzer/analysis/context.hpp>
#include <ikos/analyzer/analysis/fixpoint_parameters.hpp>
#include <ikos/analyzer/analysis/hardware_addresses.hpp>
#include <ikos/analyzer/analysis/literal.hpp>
#include <ikos/analyzer/analysis/liveness.hpp>
#include <ikos/analyzer/analysis/memory_location.hpp>
#include <ikos/analyzer/analysis/option.hpp>
#include <ikos/analyzer/analysis/pointer/function.hpp>
#include <ikos/analyzer/analysis/pointer/pointer.hpp>
#include <ikos/analyzer/analysis/result.hpp>
#include <ikos/analyzer/analysis/value/interprocedural/concurrent/analysis.hpp>
#include <ikos/analyzer/analysis/value/interprocedural/sequential/analysis.hpp>
#include <ikos/analyzer/analysis/value/intraprocedural/concurrent/analysis.hpp>
#include <ikos/analyzer/analysis/value/intraprocedural/sequential/analysis.hpp>
#include <ikos/analyzer/analysis/variable.hpp>
#include <ikos/analyzer/analysis/widening_hint.hpp>
#include <ikos/analyzer/checker/name.hpp>
#include <ikos/analyzer/database/output.hpp>
#include <ikos/analyzer/util/color.hpp>
#include <ikos/analyzer/util/log.hpp>
#include <ikos/analyzer/util/timer.hpp>
namespace ar = ikos::ar;
namespace llvm_to_ar = ikos::frontend::import;
namespace analyzer = ikos::analyzer;
/// \name Main options
/// @{
static llvm::cl::OptionCategory MainCategory("Main Options");
static llvm::cl::opt< std::string > InputFilename(
llvm::cl::Positional,
llvm::cl::desc("<input bitcode file>"),
llvm::cl::Required,
llvm::cl::value_desc("file"));
static llvm::cl::opt< std::string > OutputFilename(
"o",
llvm::cl::desc("Output database filename (default: output.db)"),
llvm::cl::value_desc("file"),
llvm::cl::init("output.db"),
llvm::cl::cat(MainCategory));
static llvm::cl::opt< analyzer::LogLevel > LogLevel(
"log",
llvm::cl::desc("Log level:"),
llvm::cl::values(
clEnumValN(analyzer::LogLevel::None, "none", "Disable logging"),
clEnumValN(analyzer::LogLevel::Critical, "critical", "Critical level"),
clEnumValN(analyzer::LogLevel::Error, "error", "Error level"),
clEnumValN(analyzer::LogLevel::Warning,
"warning",
"Warning level (default)"),
clEnumValN(analyzer::LogLevel::Info, "info", "Informative level"),
clEnumValN(analyzer::LogLevel::Debug, "debug", "Debug level"),
clEnumValN(analyzer::LogLevel::All, "all", "Show all messages")),
llvm::cl::init(analyzer::LogLevel::Warning),
llvm::cl::cat(MainCategory));
static llvm::cl::opt< analyzer::ProgressOption > Progress(
"progress",
llvm::cl::desc("Progress report:"),
llvm::cl::values(
clEnumValN(analyzer::ProgressOption::Auto,
"auto",
"Interactive if the output is a terminal (default)"),
clEnumValN(analyzer::ProgressOption::Interactive,
"interactive",
"Interactive"),
clEnumValN(analyzer::ProgressOption::Linear, "linear", "Linear"),
clEnumValN(analyzer::ProgressOption::None,
"no",
"Disable progress report")),
llvm::cl::init(analyzer::ProgressOption::Auto),
llvm::cl::cat(MainCategory));
/// @}
/// \name Analysis options
/// @{
static llvm::cl::OptionCategory AnalysisCategory("Analysis Options");
static llvm::cl::list< analyzer::CheckerName > Analyses(
"a",
llvm::cl::desc("Available analyses:"),
llvm::cl::CommaSeparated,
llvm::cl::OneOrMore,
llvm::cl::values(
clEnumValN(analyzer::CheckerName::BufferOverflow,
checker_short_name(analyzer::CheckerName::BufferOverflow),
checker_long_name(analyzer::CheckerName::BufferOverflow)),
clEnumValN(analyzer::CheckerName::DivisionByZero,
checker_short_name(analyzer::CheckerName::DivisionByZero),
checker_long_name(analyzer::CheckerName::DivisionByZero)),
clEnumValN(
analyzer::CheckerName::NullPointerDereference,
checker_short_name(analyzer::CheckerName::NullPointerDereference),
checker_long_name(analyzer::CheckerName::NullPointerDereference)),
clEnumValN(analyzer::CheckerName::AssertProver,
checker_short_name(analyzer::CheckerName::AssertProver),
checker_long_name(analyzer::CheckerName::AssertProver)),
clEnumValN(analyzer::CheckerName::UnalignedPointer,
checker_short_name(analyzer::CheckerName::UnalignedPointer),
checker_long_name(analyzer::CheckerName::UnalignedPointer)),
clEnumValN(
analyzer::CheckerName::UninitializedVariable,
checker_short_name(analyzer::CheckerName::UninitializedVariable),
checker_long_name(analyzer::CheckerName::UninitializedVariable)),
clEnumValN(analyzer::CheckerName::SignedIntOverflow,
checker_short_name(analyzer::CheckerName::SignedIntOverflow),
checker_long_name(analyzer::CheckerName::SignedIntOverflow)),
clEnumValN(
analyzer::CheckerName::UnsignedIntOverflow,
checker_short_name(analyzer::CheckerName::UnsignedIntOverflow),
checker_long_name(analyzer::CheckerName::UnsignedIntOverflow)),
clEnumValN(analyzer::CheckerName::ShiftCount,
checker_short_name(analyzer::CheckerName::ShiftCount),
checker_long_name(analyzer::CheckerName::ShiftCount)),
clEnumValN(analyzer::CheckerName::PointerOverflow,
checker_short_name(analyzer::CheckerName::PointerOverflow),
checker_long_name(analyzer::CheckerName::PointerOverflow)),
clEnumValN(analyzer::CheckerName::PointerCompare,
checker_short_name(analyzer::CheckerName::PointerCompare),
checker_long_name(analyzer::CheckerName::PointerCompare)),
clEnumValN(analyzer::CheckerName::Soundness,
checker_short_name(analyzer::CheckerName::Soundness),
checker_long_name(analyzer::CheckerName::Soundness)),
clEnumValN(analyzer::CheckerName::FunctionCall,
checker_short_name(analyzer::CheckerName::FunctionCall),
checker_long_name(analyzer::CheckerName::FunctionCall)),
clEnumValN(analyzer::CheckerName::DeadCode,
checker_short_name(analyzer::CheckerName::DeadCode),
checker_long_name(analyzer::CheckerName::DeadCode)),
clEnumValN(analyzer::CheckerName::DoubleFree,
checker_short_name(analyzer::CheckerName::DoubleFree),
checker_long_name(analyzer::CheckerName::DoubleFree)),
clEnumValN(analyzer::CheckerName::Debug,
checker_short_name(analyzer::CheckerName::Debug),
checker_long_name(analyzer::CheckerName::Debug)),
clEnumValN(analyzer::CheckerName::MemoryWatch,
checker_short_name(analyzer::CheckerName::MemoryWatch),
checker_long_name(analyzer::CheckerName::MemoryWatch))),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< analyzer::MachineIntDomainOption > Domain(
"d",
llvm::cl::desc("Available abstract domains:"),
llvm::cl::values(
clEnumValN(analyzer::MachineIntDomainOption::Interval,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::Interval),
"Interval domain"),
clEnumValN(analyzer::MachineIntDomainOption::Congruence,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::Congruence),
"Congruence domain"),
clEnumValN(analyzer::MachineIntDomainOption::IntervalCongruence,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::IntervalCongruence),
"Reduced product of Interval and Congruence"),
clEnumValN(analyzer::MachineIntDomainOption::DBM,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::DBM),
"Difference-Bound Matrices domain"),
clEnumValN(analyzer::MachineIntDomainOption::VarPackDBM,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::VarPackDBM),
"Difference-Bound Matrices domain with variable packing"),
clEnumValN(
analyzer::MachineIntDomainOption::VarPackDBMCongruence,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::VarPackDBMCongruence),
"Reduced product of DBM with variable packing and Congruence"),
clEnumValN(analyzer::MachineIntDomainOption::Gauge,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::Gauge),
"Gauge domain"),
clEnumValN(
analyzer::MachineIntDomainOption::GaugeIntervalCongruence,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::GaugeIntervalCongruence),
"Reduced product of Gauge, Interval and Congruence"),
clEnumValN(analyzer::MachineIntDomainOption::ApronInterval,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::ApronInterval),
"APRON Interval domain"),
clEnumValN(analyzer::MachineIntDomainOption::ApronOctagon,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::ApronOctagon),
"APRON Octagon domain"),
clEnumValN(analyzer::MachineIntDomainOption::ApronPolkaPolyhedra,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::ApronPolkaPolyhedra),
"APRON Polka Polyhedra domain"),
clEnumValN(
analyzer::MachineIntDomainOption::ApronPolkaLinearEqualities,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::ApronPolkaLinearEqualities),
"APRON Polka Linear Equalities domain"),
clEnumValN(analyzer::MachineIntDomainOption::ApronPplPolyhedra,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::ApronPplPolyhedra),
"APRON PPL Polyhedra domain"),
clEnumValN(
analyzer::MachineIntDomainOption::ApronPplLinearCongruences,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::ApronPplLinearCongruences),
"APRON PPL Linear Congruences domain"),
clEnumValN(analyzer::MachineIntDomainOption::
ApronPkgridPolyhedraLinearCongruences,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::
ApronPkgridPolyhedraLinearCongruences),
"APRON Pkgrid Polyhedra and Linear Congruences domain"),
clEnumValN(analyzer::MachineIntDomainOption::VarPackApronOctagon,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::VarPackApronOctagon),
"APRON Octagon domain with variable packing"),
clEnumValN(
analyzer::MachineIntDomainOption::VarPackApronPolkaPolyhedra,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::VarPackApronPolkaPolyhedra),
"APRON Polka Polyhedra domain with variable packing"),
clEnumValN(
analyzer::MachineIntDomainOption::VarPackApronPolkaLinearEqualities,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::
VarPackApronPolkaLinearEqualities),
"APRON Polka Linear Equalities domain with variable packing"),
clEnumValN(
analyzer::MachineIntDomainOption::VarPackApronPplPolyhedra,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::VarPackApronPplPolyhedra),
"APRON PPL Polyhedra domain with variable packing"),
clEnumValN(
analyzer::MachineIntDomainOption::VarPackApronPplLinearCongruences,
machine_int_domain_option_str(analyzer::MachineIntDomainOption::
VarPackApronPplLinearCongruences),
"APRON PPL Linear Congruences domain with variable packing"),
clEnumValN(analyzer::MachineIntDomainOption::
VarPackApronPkgridPolyhedraLinearCongruences,
machine_int_domain_option_str(
analyzer::MachineIntDomainOption::
VarPackApronPkgridPolyhedraLinearCongruences),
"APRON Pkgrid Polyhedra and Linear Congruences domain with "
"variable packing")),
llvm::cl::init(analyzer::MachineIntDomainOption::Interval),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::list< std::string > EntryPoints(
"entry-points",
llvm::cl::desc("List of program entry points (ex: main)"),
llvm::cl::CommaSeparated,
llvm::cl::OneOrMore,
llvm::cl::value_desc("function"),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::list< std::string > NoInitGlobals(
"no-init-globals",
llvm::cl::desc(
"Global variables should not be initialized\nfor these entry points"),
llvm::cl::CommaSeparated,
llvm::cl::value_desc("function"),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< analyzer::Procedural > Procedural(
"proc",
llvm::cl::desc("Procedurality:"),
llvm::cl::values(clEnumValN(analyzer::Procedural::Interprocedural,
"inter",
"Interprocedural analysis (default)"),
clEnumValN(analyzer::Procedural::Intraprocedural,
"intra",
"Intraprocedural analysis")),
llvm::cl::init(analyzer::Procedural::Interprocedural),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< int > Jobs("j",
llvm::cl::desc("Number of threads"),
llvm::cl::init(1),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< analyzer::WideningStrategy > WideningStrategy(
"widening-strategy",
llvm::cl::desc("Strategy for increasing iterations"),
llvm::cl::values(
clEnumValN(analyzer::WideningStrategy::Widen,
widening_strategy_str(analyzer::WideningStrategy::Widen),
"Widening operator (default)"),
clEnumValN(analyzer::WideningStrategy::Join,
widening_strategy_str(analyzer::WideningStrategy::Join),
"Join operator")),
llvm::cl::init(analyzer::WideningStrategy::Widen),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< analyzer::NarrowingStrategy > NarrowingStrategy(
"narrowing-strategy",
llvm::cl::desc("Strategy for decreasing iterations"),
llvm::cl::values(
clEnumValN(analyzer::NarrowingStrategy::Narrow,
narrowing_strategy_str(analyzer::NarrowingStrategy::Narrow),
"Narrowing operator (default)"),
clEnumValN(analyzer::NarrowingStrategy::Meet,
narrowing_strategy_str(analyzer::NarrowingStrategy::Meet),
"Meet operator")),
llvm::cl::init(analyzer::NarrowingStrategy::Narrow),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< unsigned > WideningDelay(
"widening-delay",
llvm::cl::desc(
"Number of loop iterations before using the widening strategy"),
llvm::cl::init(1),
llvm::cl::value_desc("int"),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::list< std::string > WideningDelayFunctions(
"widening-delay-functions",
llvm::cl::desc("Widening delay for specific functions"),
llvm::cl::CommaSeparated,
llvm::cl::value_desc("function:int"),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< unsigned > WideningPeriod(
"widening-period",
llvm::cl::desc("Number of loop iterations between each widening"),
llvm::cl::init(1),
llvm::cl::value_desc("int"),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< int > NarrowingIterations(
"narrowing-iterations",
llvm::cl::desc("Perform a fixed number of narrowing iterations"),
llvm::cl::init(-1),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< bool > NoLiveness(
"no-liveness",
llvm::cl::desc("Disable the liveness analysis"),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< bool > NoPointer(
"no-pointer",
llvm::cl::desc("Disable the pointer analysis"),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< bool > NoWideningHints(
"no-widening-hints",
llvm::cl::desc("Disable the widening hint analysis"),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< bool > EnablePartitioningDomain(
"enable-partitioning-domain",
llvm::cl::desc("Enable the partitioning abstract domain"),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< bool > NoFixpointCache(
"no-fixpoint-cache",
llvm::cl::desc("Disable the cache of fixpoints"),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< bool > NoChecks("no-checks",
llvm::cl::desc("Disable all the checks"),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< analyzer::GlobalsInitPolicy > GlobalsInitPolicy(
"globals-init",
llvm::cl::desc("Policy of initialization for global variables"),
llvm::cl::values(
clEnumValN(analyzer::GlobalsInitPolicy::All,
"all",
"Initialize all global variables"),
clEnumValN(
analyzer::GlobalsInitPolicy::SkipBigArrays,
"skip-big-arrays",
"Initialize all global variables except big arrays (default)"),
clEnumValN(analyzer::GlobalsInitPolicy::SkipStrings,
"skip-strings",
"Initialize all global variables except strings"),
clEnumValN(analyzer::GlobalsInitPolicy::None,
"none",
"Do not initialize any global variable")),
llvm::cl::init(analyzer::GlobalsInitPolicy::SkipBigArrays),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::list< std::string > HardwareAddresses(
"hardware-addresses",
llvm::cl::desc(
"Specify ranges (x-y) of hardware addresses, separated by a comma"),
llvm::cl::CommaSeparated,
llvm::cl::value_desc("range"),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< std::string > HardwareAddressesFile(
"hardware-addresses-file",
llvm::cl::desc("Specify ranges (x-y) of hardware addresses from a file "
"(one range per line)"),
llvm::cl::value_desc("file"),
llvm::cl::cat(AnalysisCategory));
static llvm::cl::opt< int > Argc("argc",
llvm::cl::desc("Specify a value for argc"),
llvm::cl::init(-1),
llvm::cl::cat(AnalysisCategory));
/// @}
/// \name Import options
/// @{
static llvm::cl::OptionCategory ImportCategory(
"Import Options", "Options for the translation from LLVM to AR");
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.)"),
llvm::cl::cat(ImportCategory));
static llvm::cl::opt< bool > NoLibc(
"no-libc",
llvm::cl::desc("Do not use libc intrinsics (malloc, free, etc.)"),
llvm::cl::cat(ImportCategory));
static llvm::cl::opt< bool > NoLibcpp(
"no-libcpp",
llvm::cl::desc("Do not use libcpp intrinsics (__cxa_throw, etc.)"),
llvm::cl::cat(ImportCategory));
static llvm::cl::opt< bool > AllowDebugInfoMismatch(
"allow-dbg-mismatch",
llvm::cl::desc("Allow incorrect debug information in the module"),
llvm::cl::cat(ImportCategory));
/// @}
/// \name Passes options
/// @{
static llvm::cl::OptionCategory PassCategory("AR Passes Options");
static llvm::cl::opt< bool > NoTypeCheck(
"no-type-check",
llvm::cl::desc("Do not run the type checker"),
llvm::cl::cat(PassCategory));
static llvm::cl::opt< bool > NoSimplifyCFG(
"no-simplify-cfg",
llvm::cl::desc("Do not run the simplify-cfg pass"),
llvm::cl::cat(PassCategory));
static llvm::cl::opt< bool > AddLoopCounters(
"add-loop-counters",
llvm::cl::desc("Add a loop counter in each cycle"),
llvm::cl::cat(PassCategory));
static llvm::cl::opt< bool > AddPartitioningVariables(
"add-partitioning-variables",
llvm::cl::desc("Add partitioning variable annotations on return variables"),
llvm::cl::cat(PassCategory));
static llvm::cl::opt< bool > NameValues(
"name-values",
llvm::cl::desc("Give names to variables and basic blocks"),
llvm::cl::cat(PassCategory));
static llvm::cl::opt< bool > NoNamePrefix(
"no-name-prefix",
llvm::cl::desc("Do not prefix variable names (if -name-values)"),
llvm::cl::cat(PassCategory));
static llvm::cl::opt< bool > NoSimplifyUpcastComparison(
"no-simplify-upcast-comparison",
llvm::cl::desc("Do not simplify the implicit upcast before a comparison"),
llvm::cl::cat(PassCategory));
/// @}
/// \name Debug options
/// @{
static llvm::cl::OptionCategory DebugCategory(
"Debug Options", "Options to print analysis informations");
static llvm::cl::opt< bool > DisplayLiveness(
"display-liveness",
llvm::cl::desc("Display liveness analysis results"),
llvm::cl::cat(DebugCategory));
static llvm::cl::opt< bool > DisplayFunctionPointer(
"display-function-pointer",
llvm::cl::desc("Display function pointer analysis results"),
llvm::cl::cat(DebugCategory));
static llvm::cl::opt< bool > DisplayPointer(
"display-pointer",
llvm::cl::desc("Display pointer analysis results"),
llvm::cl::cat(DebugCategory));
static llvm::cl::opt< bool > DisplayFixpointParameters(
"display-fixpoint-parameters",
llvm::cl::desc("Display fixpoint parameters"),
llvm::cl::cat(DebugCategory));
static llvm::cl::opt< bool > DisplayAR(
"display-ar",
llvm::cl::desc("Display the Abstract Representation as text"),
llvm::cl::cat(DebugCategory));
static llvm::cl::opt< bool > TraceARStmts(
"trace-ar-stmts",
llvm::cl::desc("Trace Abstract Representation statements during analysis"),
llvm::cl::cat(DebugCategory));
static llvm::cl::opt< bool > GenerateDot(
"generate-dot",
llvm::cl::desc("Generate a .dot file for each function"),
llvm::cl::cat(DebugCategory));
static llvm::cl::opt< std::string > GenerateDotDirectory(
"generate-dot-dir",
llvm::cl::desc("Output directory for .dot files"),
llvm::cl::value_desc("directory"),
llvm::cl::init("."),
llvm::cl::cat(DebugCategory));
static llvm::cl::opt< analyzer::DisplayOption > DisplayInvariants(
"display-inv",
llvm::cl::desc("Display computed invariants"),
llvm::cl::values(clEnumValN(analyzer::DisplayOption::All,
"all",
"Display all invariants"),
clEnumValN(analyzer::DisplayOption::Fail,
"fail",
"Display invariants for failed checks"),
clEnumValN(analyzer::DisplayOption::None,
"no",
"Do not display invariants (default)")),
llvm::cl::init(analyzer::DisplayOption::None),
llvm::cl::cat(DebugCategory));
static llvm::cl::opt< analyzer::DisplayOption > DisplayChecks(
"display-checks",
llvm::cl::desc("Display checks"),
llvm::cl::values(
clEnumValN(analyzer::DisplayOption::All, "all", "Display all checks"),
clEnumValN(analyzer::DisplayOption::Fail,
"fail",
"Display only failed checks"),
clEnumValN(analyzer::DisplayOption::None,
"no",
"Do not display checks (default)")),
llvm::cl::init(analyzer::DisplayOption::None),
llvm::cl::cat(DebugCategory));
/// @}
/// \name Formatting options
/// @{
static llvm::cl::OptionCategory FormatCategory("Formatting Options");
static llvm::cl::opt< bool > NoShowResultType(
"no-show-result-type",
llvm::cl::desc("Do not show the result type of statements"),
llvm::cl::cat(FormatCategory));
static llvm::cl::opt< bool > ShowOperandTypes(
"show-operand-types",
llvm::cl::desc("Show the operand types of statements"),
llvm::cl::cat(FormatCategory));
static llvm::cl::opt< bool > OrderGlobals(
"order-globals",
llvm::cl::desc("Order global variables and functions by name"),
llvm::cl::cat(FormatCategory));
/// @}
/// \brief Return true if colors are enabled
static bool colors_enabled() {
// Use a function from llvm/lib/Support/WithColor.cpp so that the global
// constructors are called, and the 'color' option is registered.
llvm::WithColor x(llvm::outs(), llvm::HighlightColor::String);
const llvm::StringMap< llvm::cl::Option* >& opts =
llvm::cl::getRegisteredOptions();
auto it = opts.find("color");
ikos_assert_msg(it != opts.end(), "Option 'color' is not registered");
auto opt =
static_cast< llvm::cl::opt< llvm::cl::boolOrDefault >* >(it->second);
if (opt->getValue() == llvm::cl::BOU_UNSET) {
return llvm::sys::Process::StandardOutIsDisplayed();
} else {
return opt->getValue() == llvm::cl::BOU_TRUE;
}
}
/// \brief Build LLVM to AR 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 Parse a list of function names and return a list of functions
static std::vector< ar::Function* > parse_function_names(
const llvm::cl::list< std::string >& opt, ar::Bundle* bundle) {
std::vector< ar::Function* > functions;
if (std::find(opt.begin(), opt.end(), "*") != opt.end()) {
// Wildcard: all functions
std::copy_if(bundle->function_begin(),
bundle->function_end(),
std::back_inserter(functions),
[](ar::Function* fun) { return fun->is_definition(); });
return functions;
}
for (std::string name : opt) {
boost::trim(name);
ar::Function* fun = bundle->function_or_null(name);
if (fun == nullptr) {
std::ostringstream buf;
buf << "could not find function '" << name << "'";
throw analyzer::ArgumentError(buf.str());
}
if (!fun->is_definition()) {
std::ostringstream buf;
buf << "missing implementation for function '" << name << "'";
throw analyzer::ArgumentError(buf.str());
}
functions.push_back(fun);
}
return functions;
}
/// \brief Interpret an unsigned integer value in the string `str`
static unsigned stou(const std::string& str,
size_t* pos = nullptr,
int base = 10) {
// NOLINTNEXTLINE(google-runtime-int)
long long n = std::stoll(str, pos, base);
if (n < 0 || n > std::numeric_limits< unsigned >::max()) {
throw std::out_of_range("stou: out of range");
}
return static_cast< unsigned >(n);
}
/// \brief Parse a list of "function:unsigned" and return a map
static boost::container::flat_map< ar::Function*, unsigned >
parse_function_names_to_unsigned(const llvm::cl::list< std::string >& opt,
ar::Bundle* bundle) {
boost::container::flat_map< ar::Function*, unsigned > map;
for (const auto& str : opt) {
size_t colon = str.find(':');
if (colon == std::string::npos) {
std::ostringstream buf;
buf << "could not find separator ':' in '" << str << "'";
throw analyzer::ArgumentError(buf.str());
}
std::string name = str.substr(0, colon);
boost::trim(name);
ar::Function* fun = bundle->function_or_null(name);
if (fun == nullptr) {
std::ostringstream buf;
buf << "could not find function '" << name << "'";
throw analyzer::ArgumentError(buf.str());
}
std::string number_str = str.substr(colon + 1);
boost::trim(number_str);
unsigned number;
try {
number = stou(number_str, nullptr, 0);
} catch (const std::invalid_argument&) {
std::ostringstream buf;
buf << "could not parse integer '" << number_str << "'";
throw analyzer::ArgumentError(buf.str());
} catch (const std::out_of_range&) {
std::ostringstream buf;
buf << "integer out of range '" << number_str << "'";
throw analyzer::ArgumentError(buf.str());
}
map[fun] = number;
}
return map;
}
/// \brief Build analysis options from command line arguments
static analyzer::AnalysisOptions make_analysis_options(ar::Bundle* bundle) {
return analyzer::AnalysisOptions{
.analyses = {Analyses.begin(), Analyses.end()},
.entry_points = parse_function_names(EntryPoints, bundle),
.no_init_globals = parse_function_names(NoInitGlobals, bundle),
.machine_int_domain = Domain,
.procedural = Procedural,
.num_threads = Jobs,
.widening_strategy = WideningStrategy,
.narrowing_strategy = NarrowingStrategy,
.widening_delay = WideningDelay,
.widening_delay_functions =
parse_function_names_to_unsigned(WideningDelayFunctions, bundle),
.widening_period = WideningPeriod,
.narrowing_iterations =
((NarrowingIterations >= 0)
? boost::optional< unsigned >(NarrowingIterations)
: boost::none),
.use_liveness = !NoLiveness,
.use_pointer = !NoPointer,
.use_widening_hints = !NoWideningHints,
.use_partitioning_domain = EnablePartitioningDomain,
.use_fixpoint_cache = !NoFixpointCache,
.use_checks = !NoChecks,
.trace_ar_statements = TraceARStmts,
.globals_init_policy = GlobalsInitPolicy,
.progress = Progress,
.display_invariants = DisplayInvariants,
.display_checks = DisplayChecks,
.hardware_addresses = {bundle, HardwareAddresses, HardwareAddressesFile},
.argc = ((Argc >= 0) ? boost::optional< int >(Argc) : boost::none),
};
}
/// \brief Generate a .dot file for each function in the given Bundle
static void generate_dot(ar::Bundle* bundle,
const boost::filesystem::path& directory) {
boost::system::error_code err;
ar::DotFormatter formatter(make_format_options());
if (!boost::filesystem::exists(directory)) {
if (!boost::filesystem::create_directories(directory, err)) {
analyzer::log::error(directory.string() + ": " + err.message());
return;
}
}
if (!boost::filesystem::is_directory(directory, err)) {
analyzer::log::error(directory.string() + ": not a directory");
return;
}
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";
boost::filesystem::path filepath = directory / filename;
analyzer::log::debug("Creating " +
((directory == ".") ? filename : filepath.string()));
boost::filesystem::ofstream output(filepath);
if (!output.is_open()) {
analyzer::log::error(filepath.string() + ": " + strerror(errno));
return;
}
formatter.format(output, fun);
}
}
/// \brief Main for ikos-analyzer
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-analyzer -- IKOS static analyzer";
llvm::cl::ParseCommandLineOptions(argc, argv, overview);
// Set log level
analyzer::log::Level = LogLevel;
// Enable colors, if asked
analyzer::color::Enable = colors_enabled();
try {
// Initialize output database
// This might throw DbError, see catch()
analyzer::log::debug("Creating output database '" + OutputFilename + "'");
analyzer::sqlite::DbConnection db(OutputFilename);
db.set_journal_mode(analyzer::sqlite::JournalMode::Off);
db.set_synchronous_flag(analyzer::sqlite::SynchronousFlag::Off);
analyzer::OutputDatabase output_db(db);
// Load the input module
std::unique_ptr< llvm::Module > module = nullptr;
{
analyzer::log::debug("Loading LLVM bitcode");
analyzer::ScopeTimerDatabase t(output_db.times, "ikos-analyzer.load-bc");
llvm::SMDiagnostic err; // Error diagnostic
module = llvm::parseIRFile(InputFilename, err, llvm_context);
if (!module) {
err.print(progname.c_str(), llvm::errs());
return 2;
}
}
// Immediately run the verifier to catch any problems
if (!NoVerify) {
analyzer::log::debug("Verifying integrity of LLVM bitcode");
analyzer::ScopeTimerDatabase t(output_db.times,
"ikos-analyzer.verify-bc");
if (verifyModule(*module, &llvm::errs())) {
llvm::errs() << progname << ": " << InputFilename
<< ": error: input module is broken!\n";
return 3;
}
}
// Check for debug information in LLVM
{
analyzer::log::debug("Checking for debug information");
if (!llvm_to_ar::has_debug_info(*module)) {
// We warn but allow analysis to proceed.
llvm::errs() << progname << ": " << InputFilename
<< ": warning: llvm bitcode has no debug information\n";
}
}
// AR context
ar::Context ar_context;
// Translate LLVM bitcode into AR
// This might throw ImportError, see catch()
ar::Bundle* bundle = nullptr;
{
analyzer::log::info("Translating LLVM bitcode to AR");
analyzer::ScopeTimerDatabase t(output_db.times,
"ikos-analyzer.llvm-to-ar");
llvm_to_ar::Importer importer(ar_context);
bundle = importer.import(*module, make_import_options());
}
// Run type checker
if (!NoTypeCheck) {
analyzer::log::debug("Running type verifier on AR");
analyzer::ScopeTimerDatabase t(output_db.times,
"ikos-analyzer.type-checker");
if (!ar::TypeVerifier(/*all = */ true).verify(bundle, std::cerr)) {
llvm::errs() << progname << ": " << InputFilename
<< ": error: type checker\n";
return 7;
}
}
// Check for debug information in AR
if (!ar::FrontendVerifier(/*all = */ true).verify(bundle, std::cerr)) {
return 8;
}
// Simplify the control flow graph
if (!NoSimplifyCFG) {
analyzer::log::debug("Running simplify-cfg pass on AR");
analyzer::ScopeTimerDatabase t(output_db.times,
"ikos-analyzer.simplify-cfg");
ar::SimplifyCFGPass().run(bundle);
}
// Add a loop counter in each cycle, for the Gauge domain
if (AddLoopCounters) {
analyzer::log::debug("Running add-loop-counters pass on AR");
analyzer::ScopeTimerDatabase t(output_db.times,
"ikos-analyzer.add-loop-counters");
ar::AddLoopCountersPass().run(bundle);
}
// Add partitioning variable annotations, for the Partitioning domain
if (AddPartitioningVariables) {
analyzer::log::debug("Running add-partitioning-variables pass on AR");
analyzer::ScopeTimerDatabase
t(output_db.times, "ikos-analyzer.add-partitioning-variables");
ar::AddPartitioningVariablesPass().run(bundle);
}
// Simplify upcast comparison loop
if (!NoSimplifyUpcastComparison) {
analyzer::log::debug("Running simplify-upcast-comparison pass on AR");
analyzer::ScopeTimerDatabase
t(output_db.times, "ikos-analyzer.simplify-upcast-comparison");
ar::SimplifyUpcastComparisonPass().run(bundle);
}
// Name variables and basic block, for debugging purpose only