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Driver.cpp
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//===--- Driver.cpp - Swift compiler driver -------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2018 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
// This file contains implementations of parts of the compiler driver.
//
//===----------------------------------------------------------------------===//
#include "swift/Driver/Driver.h"
#include "ToolChains.h"
#include "swift/AST/DiagnosticEngine.h"
#include "swift/AST/DiagnosticsDriver.h"
#include "swift/AST/DiagnosticsFrontend.h"
#include "swift/Basic/Assertions.h"
#include "swift/Basic/LLVM.h"
#include "swift/Basic/LangOptions.h"
#include "swift/Basic/OutputFileMap.h"
#include "swift/Basic/Platform.h"
#include "swift/Basic/Range.h"
#include "swift/Basic/Statistic.h"
#include "swift/Basic/TaskQueue.h"
#include "swift/Basic/Version.h"
#include "swift/Config.h"
#include "swift/Driver/Action.h"
#include "swift/Driver/Compilation.h"
#include "swift/Driver/Job.h"
#include "swift/Driver/PrettyStackTrace.h"
#include "swift/Driver/ToolChain.h"
#include "swift/Option/Options.h"
#include "swift/Option/SanitizerOptions.h"
#include "swift/Parse/Lexer.h"
#include "swift/Strings.h"
#include "llvm/ADT/APInt.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Config/config.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/OptTable.h"
#include "llvm/Remarks/RemarkFormat.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MD5.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/TargetParser/Host.h"
#include <memory>
using namespace swift;
using namespace swift::driver;
using namespace llvm::opt;
Driver::Driver(StringRef DriverExecutable,
StringRef Name,
ArrayRef<const char *> Args,
DiagnosticEngine &Diags)
: Opts(createSwiftOptTable()), Diags(Diags),
Name(Name), DriverExecutable(DriverExecutable),
DefaultTargetTriple(llvm::sys::getDefaultTargetTriple()) {
// The driver kind must be parsed prior to parsing arguments, since that
// affects how arguments are parsed.
parseDriverKind(Args.slice(1));
}
Driver::~Driver() = default;
void Driver::parseDriverKind(ArrayRef<const char *> Args) {
// The default driver kind is determined by Name.
StringRef DriverName = Name;
StringRef OptName;
// However, the driver kind may be overridden if the first argument is
// --driver-mode.
if (!Args.empty()) {
OptName = getOpts().getOption(options::OPT_driver_mode).getPrefixedName();
StringRef FirstArg(Args[0]);
if (FirstArg.starts_with(OptName))
DriverName = FirstArg.drop_front(OptName.size());
}
std::optional<DriverKind> Kind =
llvm::StringSwitch<std::optional<DriverKind>>(DriverName)
.Case("swift", DriverKind::Interactive)
.Case("swiftc", DriverKind::Batch)
.Case("swift-legacy-driver", DriverKind::Interactive)
.Case("swiftc-legacy-driver", DriverKind::Batch)
.Case("sil-opt", DriverKind::SILOpt)
.Case("sil-func-extractor", DriverKind::SILFuncExtractor)
.Case("sil-nm", DriverKind::SILNM)
.Case("sil-llvm-gen", DriverKind::SILLLVMGen)
.Case("sil-passpipeline-dumper", DriverKind::SILPassPipelineDumper)
.Case("swift-dependency-tool", DriverKind::SwiftDependencyTool)
.Case("swift-llvm-opt", DriverKind::SwiftLLVMOpt)
.Case("swift-autolink-extract", DriverKind::AutolinkExtract)
.Case("swift-symbolgraph-extract", DriverKind::SymbolGraph)
.Case("swift-api-digester", DriverKind::APIDigester)
.Case("swift-cache-tool", DriverKind::CacheTool)
.Case("swift-parse-test", DriverKind::ParseTest)
.Case("swift-synthesize-interface", DriverKind::SynthesizeInterface)
.Default(std::nullopt);
if (Kind.has_value())
driverKind = Kind.value();
else if (!OptName.empty())
Diags.diagnose({}, diag::error_invalid_arg_value, OptName, DriverName);
}
ArrayRef<const char *> Driver::getArgsWithoutProgramNameAndDriverMode(
ArrayRef<const char *> Args) const {
Args = Args.slice(1);
if (Args.empty())
return Args;
StringRef OptName =
getOpts().getOption(options::OPT_driver_mode).getPrefixedName();
if (StringRef(Args[0]).starts_with(OptName))
Args = Args.slice(1);
return Args;
}
static void validateLegacyUnsupportedArgs(DiagnosticEngine &diags,
const ArgList &args) {
if (args.hasArg(options::OPT_incremental)) {
diags.diagnose({}, diag::warning_unsupported_driver_option, "-incremental");
}
return;
}
static void validateBridgingHeaderArgs(DiagnosticEngine &diags,
const ArgList &args) {
if (!args.hasArgNoClaim(options::OPT_import_objc_header))
return;
if (args.hasArgNoClaim(options::OPT_import_underlying_module))
diags.diagnose({}, diag::error_framework_bridging_header);
if (args.hasArgNoClaim(options::OPT_emit_module_interface,
options::OPT_emit_module_interface_path)) {
diags.diagnose({}, diag::error_bridging_header_module_interface);
}
}
static void validateWarningControlArgs(DiagnosticEngine &diags,
const ArgList &args) {
if (args.hasArg(options::OPT_suppress_warnings)) {
if (args.hasFlag(options::OPT_warnings_as_errors,
options::OPT_no_warnings_as_errors, false)) {
diags.diagnose(SourceLoc(), diag::error_conflicting_options,
"-warnings-as-errors", "-suppress-warnings");
}
if (args.hasArg(options::OPT_Wwarning)) {
diags.diagnose(SourceLoc(), diag::error_conflicting_options, "-Wwarning",
"-suppress-warnings");
}
if (args.hasArg(options::OPT_Werror)) {
diags.diagnose(SourceLoc(), diag::error_conflicting_options, "-Werror",
"-suppress-warnings");
}
}
}
static void validateProfilingArgs(DiagnosticEngine &diags,
const ArgList &args) {
const Arg *ProfileGenerate = args.getLastArg(options::OPT_profile_generate);
const Arg *ProfileUse = args.getLastArg(options::OPT_profile_use);
if (ProfileGenerate && ProfileUse) {
diags.diagnose(SourceLoc(), diag::error_conflicting_options,
"-profile-generate", "-profile-use");
}
// Check if the profdata is missing
if (ProfileUse && !llvm::sys::fs::exists(ProfileUse->getValue())) {
diags.diagnose(SourceLoc(), diag::error_profile_missing,
ProfileUse->getValue());
}
}
static void validateDependencyScanningArgs(DiagnosticEngine &diags,
const ArgList &args) {
const Arg *ExternalDependencyMap =
args.getLastArg(options::OPT_placeholder_dependency_module_map);
const Arg *ScanDependencies = args.getLastArg(options::OPT_scan_dependencies);
const Arg *Prescan = args.getLastArg(options::OPT_import_prescan);
const Arg *SerializeCache =
args.getLastArg(options::OPT_serialize_dependency_scan_cache);
const Arg *ReuseCache =
args.getLastArg(options::OPT_reuse_dependency_scan_cache);
const Arg *CacheSerializationPath =
args.getLastArg(options::OPT_dependency_scan_cache_path);
const Arg *ValidatePriorCache =
args.getLastArg(options::OPT_validate_prior_dependency_scan_cache);
if (ExternalDependencyMap && !ScanDependencies) {
diags.diagnose(SourceLoc(), diag::error_requirement_not_met,
"-placeholder-dependency-module-map-file",
"-scan-dependencies");
}
if (Prescan && !ScanDependencies) {
diags.diagnose(SourceLoc(), diag::error_requirement_not_met,
"-import-prescan", "-scan-dependencies");
}
if (Prescan && !ScanDependencies) {
diags.diagnose(SourceLoc(), diag::error_requirement_not_met,
"-import-prescan", "-scan-dependencies");
}
if (SerializeCache && !ScanDependencies) {
diags.diagnose(SourceLoc(), diag::error_requirement_not_met,
"-serialize-dependency-scan-cache", "-scan-dependencies");
}
if (ReuseCache && !ScanDependencies) {
diags.diagnose(SourceLoc(), diag::error_requirement_not_met,
"-load-dependency-scan-cache", "-scan-dependencies");
}
if (SerializeCache && !CacheSerializationPath) {
diags.diagnose(SourceLoc(), diag::error_requirement_not_met,
"-serialize-dependency-scan-cache",
"-dependency-scan-cache-path");
}
if (ReuseCache && !CacheSerializationPath) {
diags.diagnose(SourceLoc(), diag::error_requirement_not_met,
"-serialize-dependency-scan-cache",
"-dependency-scan-cache-path");
}
if (ValidatePriorCache && !ReuseCache) {
diags.diagnose(SourceLoc(), diag::error_requirement_not_met,
"-validate-prior-dependency-scan-cache",
"-load-dependency-scan-cache");
}
}
static void validateDebugInfoArgs(DiagnosticEngine &diags,
const ArgList &args) {
// Check for missing debug option when verifying debug info.
if (args.hasArg(options::OPT_verify_debug_info)) {
Arg *debugOpt = args.getLastArg(swift::options::OPT_g_Group);
if (!debugOpt || debugOpt->getOption().matches(swift::options::OPT_gnone)) {
diags.diagnose(SourceLoc(),
diag::verify_debug_info_requires_debug_option);
}
}
// Check for any -*-prefix-map options that aren't of the form
// 'original=remapped' (either side can be empty, however).
for (const Arg *A : args.filtered(options::OPT_debug_prefix_map,
options::OPT_coverage_prefix_map,
options::OPT_file_prefix_map)) {
StringRef val = A->getValue();
if (val.find('=') == StringRef::npos)
diags.diagnose(SourceLoc(), diag::error_opt_invalid_mapping,
A->getOption().getPrefixedName(), val);
}
}
static void validateCompilationConditionArgs(DiagnosticEngine &diags,
const ArgList &args) {
for (const Arg *A : args.filtered(options::OPT_D)) {
StringRef name = A->getValue();
if (name.contains('=')) {
diags.diagnose(SourceLoc(),
diag::cannot_assign_value_to_conditional_compilation_flag,
name);
} else if (name.starts_with("-D")) {
diags.diagnose(SourceLoc(), diag::redundant_prefix_compilation_flag,
name);
} else if (!Lexer::isIdentifier(name)) {
diags.diagnose(SourceLoc(), diag::invalid_conditional_compilation_flag,
name);
}
}
}
static void validateSearchPathArgs(DiagnosticEngine &diags,
const ArgList &args) {
for (const Arg *A : args.filtered(options::OPT_F, options::OPT_Fsystem)) {
StringRef name = A->getValue();
if (name.ends_with(".framework") || name.ends_with(".framework/"))
diags.diagnose(SourceLoc(),
diag::framework_search_path_includes_framework_extension,
name);
}
}
static void validateLinkArgs(DiagnosticEngine &diags, const ArgList &args) {
if (args.hasArg(options::OPT_experimental_hermetic_seal_at_link)) {
if (args.hasArg(options::OPT_enable_library_evolution)) {
diags.diagnose(SourceLoc(),
diag::error_hermetic_seal_cannot_have_library_evolution);
}
bool ltoOk = false;
if (const Arg *A = args.getLastArg(options::OPT_lto)) {
StringRef name = A->getValue();
if (name == "llvm-thin" || name == "llvm-full") {
ltoOk = true;
}
}
if (!ltoOk) {
diags.diagnose(SourceLoc(),
diag::error_hermetic_seal_requires_lto);
}
}
}
/// Perform miscellaneous early validation of arguments.
static void validateArgs(DiagnosticEngine &diags, const ArgList &args,
const llvm::Triple &T) {
validateLegacyUnsupportedArgs(diags, args);
validateBridgingHeaderArgs(diags, args);
validateWarningControlArgs(diags, args);
validateProfilingArgs(diags, args);
validateDependencyScanningArgs(diags, args);
validateDebugInfoArgs(diags, args);
validateCompilationConditionArgs(diags, args);
validateSearchPathArgs(diags, args);
validateLinkArgs(diags, args);
}
std::unique_ptr<ToolChain>
Driver::buildToolChain(const llvm::opt::InputArgList &ArgList) {
if (const Arg *A = ArgList.getLastArg(options::OPT_target)) {
DefaultTargetTriple = llvm::Triple::normalize(A->getValue());
}
llvm::Triple target(DefaultTargetTriple);
// Backward compatibility hack: infer "simulator" environment for x86
// iOS/tvOS/watchOS.
if (tripleInfersSimulatorEnvironment(target)) {
// Set the simulator environment.
target.setEnvironment(llvm::Triple::EnvironmentType::Simulator);
auto newTargetTriple = target.normalize();
Diags.diagnose(SourceLoc(), diag::warning_inferred_simulator_target,
DefaultTargetTriple, newTargetTriple);
DefaultTargetTriple = newTargetTriple;
}
switch (target.getOS()) {
case llvm::Triple::XROS:
case llvm::Triple::IOS:
case llvm::Triple::TvOS:
case llvm::Triple::WatchOS:
case llvm::Triple::Darwin:
case llvm::Triple::MacOSX: {
std::optional<llvm::Triple> targetVariant;
if (const Arg *A = ArgList.getLastArg(options::OPT_target_variant))
targetVariant = llvm::Triple(llvm::Triple::normalize(A->getValue()));
return std::make_unique<toolchains::Darwin>(*this, target, targetVariant);
}
case llvm::Triple::Linux:
if (target.isAndroid())
return std::make_unique<toolchains::Android>(*this, target);
return std::make_unique<toolchains::GenericUnix>(*this, target);
case llvm::Triple::FreeBSD:
return std::make_unique<toolchains::FreeBSD>(*this, target);
case llvm::Triple::OpenBSD:
return std::make_unique<toolchains::OpenBSD>(*this, target);
case llvm::Triple::Win32:
if (target.isWindowsCygwinEnvironment())
return std::make_unique<toolchains::Cygwin>(*this, target);
return std::make_unique<toolchains::Windows>(*this, target);
case llvm::Triple::Haiku:
return std::make_unique<toolchains::GenericUnix>(*this, target);
case llvm::Triple::WASI:
return std::make_unique<toolchains::WebAssembly>(*this, target);
case llvm::Triple::UnknownOS:
return std::make_unique<toolchains::GenericUnix>(*this, target);
default:
Diags.diagnose(SourceLoc(), diag::error_unknown_target,
ArgList.getLastArg(options::OPT_target)->getValue());
break;
}
return nullptr;
}
std::unique_ptr<sys::TaskQueue> Driver::buildTaskQueue(const Compilation &C) {
const auto &ArgList = C.getArgs();
unsigned NumberOfParallelCommands = 1;
if (const Arg *A = ArgList.getLastArg(options::OPT_j)) {
if (StringRef(A->getValue()).getAsInteger(10, NumberOfParallelCommands)) {
Diags.diagnose(SourceLoc(), diag::error_invalid_arg_value,
A->getAsString(ArgList), A->getValue());
return nullptr;
}
}
if (environmentVariableRequestedMaximumDeterminism()) {
NumberOfParallelCommands = 1;
Diags.diagnose(SourceLoc(), diag::remark_max_determinism_overriding,
"-j");
}
const bool DriverSkipExecution =
ArgList.hasArg(options::OPT_driver_skip_execution,
options::OPT_driver_print_jobs);
if (DriverSkipExecution) {
return std::make_unique<sys::DummyTaskQueue>(NumberOfParallelCommands);
} else {
return std::make_unique<sys::TaskQueue>(NumberOfParallelCommands,
C.getStatsReporter());
}
}
// warn if -embed-bitcode is set and the output type is not an object
static void validateEmbedBitcode(DerivedArgList &Args, const OutputInfo &OI,
DiagnosticEngine &Diags) {
if (Args.hasArg(options::OPT_embed_bitcode) &&
OI.CompilerOutputType != file_types::TY_Object) {
Diags.diagnose(SourceLoc(), diag::warn_ignore_embed_bitcode);
Args.eraseArg(options::OPT_embed_bitcode);
}
if (Args.hasArg(options::OPT_embed_bitcode_marker) &&
OI.CompilerOutputType != file_types::TY_Object) {
Diags.diagnose(SourceLoc(), diag::warn_ignore_embed_bitcode_marker);
Args.eraseArg(options::OPT_embed_bitcode_marker);
}
}
/// Gets the filelist threshold to use. Diagnoses and returns true on error.
static bool getFilelistThreshold(DerivedArgList &Args, size_t &FilelistThreshold,
DiagnosticEngine &Diags) {
FilelistThreshold = 128;
// claim and diagnose deprecated -driver-use-filelists
bool HasUseFilelists = Args.hasArg(options::OPT_driver_use_filelists);
if (HasUseFilelists)
Diags.diagnose(SourceLoc(), diag::warn_use_filelists_deprecated);
if (const Arg *A = Args.getLastArg(options::OPT_driver_filelist_threshold)) {
// Use the supplied threshold
if (StringRef(A->getValue()).getAsInteger(10, FilelistThreshold)) {
Diags.diagnose(SourceLoc(), diag::error_invalid_arg_value,
A->getAsString(Args), A->getValue());
return true;
}
} else if (HasUseFilelists) {
// Treat -driver-use-filelists as -driver-filelist-threshold=0
FilelistThreshold = 0;
} // else stick with the default
return false;
}
static unsigned
getDriverBatchSeed(llvm::opt::InputArgList &ArgList,
DiagnosticEngine &Diags) {
unsigned DriverBatchSeed = 0;
if (const Arg *A = ArgList.getLastArg(options::OPT_driver_batch_seed)) {
if (StringRef(A->getValue()).getAsInteger(10, DriverBatchSeed)) {
Diags.diagnose(SourceLoc(), diag::error_invalid_arg_value,
A->getAsString(ArgList), A->getValue());
}
}
return DriverBatchSeed;
}
static std::optional<unsigned>
getDriverBatchCount(llvm::opt::InputArgList &ArgList, DiagnosticEngine &Diags) {
if (const Arg *A = ArgList.getLastArg(options::OPT_driver_batch_count)) {
unsigned Count = 0;
if (StringRef(A->getValue()).getAsInteger(10, Count)) {
Diags.diagnose(SourceLoc(), diag::error_invalid_arg_value,
A->getAsString(ArgList), A->getValue());
} else {
return Count;
}
}
return std::nullopt;
}
static std::string
computeWorkingDirectory(const llvm::opt::InputArgList *ArgList) {
if (auto *A = ArgList->getLastArg(options::OPT_working_directory)) {
SmallString<128> workingDirectory;
workingDirectory = A->getValue();
llvm::sys::fs::make_absolute(workingDirectory);
std::string result = workingDirectory.str().str();
return result;
}
return std::string();
}
static std::unique_ptr<UnifiedStatsReporter>
createStatsReporter(const llvm::opt::InputArgList *ArgList,
const InputFileList &Inputs, const OutputInfo OI,
StringRef DefaultTargetTriple) {
const Arg *A = ArgList->getLastArgNoClaim(options::OPT_stats_output_dir);
if (!A)
return nullptr;
StringRef OptType;
if (const Arg *OptA = ArgList->getLastArgNoClaim(options::OPT_O_Group)) {
OptType = OptA->getSpelling();
}
StringRef InputName;
if (Inputs.size() == 1) {
InputName = Inputs[0].second->getSpelling();
}
StringRef OutputType = file_types::getExtension(OI.CompilerOutputType);
return std::make_unique<UnifiedStatsReporter>("swift-driver",
OI.ModuleName,
InputName,
DefaultTargetTriple,
OutputType,
OptType,
A->getValue(),
nullptr,
nullptr,
false,
false,
false,
false,
false);
}
static bool
computeContinueBuildingAfterErrors(const bool BatchMode,
const llvm::opt::InputArgList *ArgList) {
// Note: Batch mode handling of serialized diagnostics requires that all
// batches get to run, in order to make sure that all diagnostics emitted
// during the compilation end up in at least one serialized diagnostic file.
// Therefore, treat batch mode as implying -continue-building-after-errors.
// (This behavior could be limited to only when serialized diagnostics are
// being emitted, but this seems more consistent and less surprising for
// users.)
// FIXME: We don't really need (or want) a full ContinueBuildingAfterErrors.
// If we fail to precompile a bridging header, for example, there's no need
// to go on to compilation of source files, and if compilation of source files
// fails, we shouldn't try to link. Instead, we'd want to let all jobs finish
// but not schedule any new ones.
return BatchMode ||
ArgList->hasArg(options::OPT_continue_building_after_errors);
}
static std::optional<unsigned>
getDriverBatchSizeLimit(llvm::opt::InputArgList &ArgList,
DiagnosticEngine &Diags) {
if (const Arg *A = ArgList.getLastArg(options::OPT_driver_batch_size_limit)) {
unsigned Limit = 0;
if (StringRef(A->getValue()).getAsInteger(10, Limit)) {
Diags.diagnose(SourceLoc(), diag::error_invalid_arg_value,
A->getAsString(ArgList), A->getValue());
} else {
return Limit;
}
}
return std::nullopt;
}
std::unique_ptr<Compilation>
Driver::buildCompilation(const ToolChain &TC,
std::unique_ptr<llvm::opt::InputArgList> ArgList,
bool AllowErrors) {
llvm::PrettyStackTraceString CrashInfo("Compilation construction");
// Claim --driver-mode here, since it's already been handled.
(void) ArgList->hasArg(options::OPT_driver_mode);
DriverPrintBindings = ArgList->hasArg(options::OPT_driver_print_bindings);
const std::string workingDirectory = computeWorkingDirectory(ArgList.get());
std::unique_ptr<DerivedArgList> TranslatedArgList(
translateInputAndPathArgs(*ArgList, workingDirectory));
validateArgs(Diags, *TranslatedArgList, TC.getTriple());
// Perform toolchain specific args validation.
TC.validateArguments(Diags, *TranslatedArgList, DefaultTargetTriple);
if (Diags.hadAnyError() && !AllowErrors)
return nullptr;
if (!handleImmediateArgs(*TranslatedArgList, TC)) {
return nullptr;
}
// Construct the list of inputs.
InputFileList Inputs;
buildInputs(TC, *TranslatedArgList, Inputs);
if (Diags.hadAnyError() && !AllowErrors)
return nullptr;
// Determine the OutputInfo for the driver.
OutputInfo OI;
bool BatchMode = false;
OI.CompilerMode = computeCompilerMode(*TranslatedArgList, Inputs, BatchMode);
buildOutputInfo(TC, *TranslatedArgList, BatchMode, Inputs, OI);
if (Diags.hadAnyError() && !AllowErrors)
return nullptr;
assert(OI.CompilerOutputType != file_types::ID::TY_INVALID &&
"buildOutputInfo() must set a valid output type!");
TC.validateOutputInfo(Diags, OI);
if (Diags.hadAnyError() && !AllowErrors)
return nullptr;
validateEmbedBitcode(*TranslatedArgList, OI, Diags);
if (OI.CompilerMode == OutputInfo::Mode::REPL)
// REPL mode expects no input files, so suppress the error.
SuppressNoInputFilesError = true;
std::optional<OutputFileMap> OFM =
buildOutputFileMap(*TranslatedArgList, workingDirectory);
if (Diags.hadAnyError() && !AllowErrors)
return nullptr;
if (ArgList->hasArg(options::OPT_driver_print_output_file_map)) {
if (OFM)
OFM->dump(llvm::errs(), true);
else
Diags.diagnose(SourceLoc(), diag::error_no_output_file_map_specified);
if (!AllowErrors) {
return nullptr;
}
}
size_t DriverFilelistThreshold;
if (getFilelistThreshold(*TranslatedArgList, DriverFilelistThreshold, Diags))
return nullptr;
OutputLevel Level = OutputLevel::Normal;
if (const Arg *A =
ArgList->getLastArg(options::OPT_driver_print_jobs, options::OPT_v,
options::OPT_parseable_output)) {
if (A->getOption().matches(options::OPT_driver_print_jobs))
Level = OutputLevel::PrintJobs;
else if (A->getOption().matches(options::OPT_v))
Level = OutputLevel::Verbose;
else if (A->getOption().matches(options::OPT_parseable_output))
Level = OutputLevel::Parseable;
else
llvm_unreachable("Unknown OutputLevel argument!");
}
// About to move argument list, so capture some flags that will be needed
// later.
const bool DriverPrintActions =
ArgList->hasArg(options::OPT_driver_print_actions);
const bool DriverPrintDerivedOutputFileMap =
ArgList->hasArg(options::OPT_driver_print_derived_output_file_map);
const bool ContinueBuildingAfterErrors =
computeContinueBuildingAfterErrors(BatchMode, ArgList.get());
const bool ShowJobLifecycle =
ArgList->hasArg(options::OPT_driver_show_job_lifecycle);
// In order to confine the values below, while still moving the argument
// list, and preserving the interface to Compilation, enclose the call to the
// constructor in a block:
std::unique_ptr<Compilation> C;
{
const unsigned DriverBatchSeed = getDriverBatchSeed(*ArgList, Diags);
const std::optional<unsigned> DriverBatchCount =
getDriverBatchCount(*ArgList, Diags);
const std::optional<unsigned> DriverBatchSizeLimit =
getDriverBatchSizeLimit(*ArgList, Diags);
const bool SaveTemps = ArgList->hasArg(options::OPT_save_temps);
const bool ShowDriverTimeCompilation =
ArgList->hasArg(options::OPT_driver_time_compilation);
std::unique_ptr<UnifiedStatsReporter> StatsReporter =
createStatsReporter(ArgList.get(), Inputs, OI, DefaultTargetTriple);
const bool OnlyOneDependencyFile =
ArgList->hasFlag(options::OPT_enable_only_one_dependency_file,
options::OPT_disable_only_one_dependency_file, false);
// clang-format off
C = std::make_unique<Compilation>(
Diags, TC, OI, Level,
std::move(ArgList),
std::move(TranslatedArgList),
std::move(Inputs),
DriverFilelistThreshold,
BatchMode,
DriverBatchSeed,
DriverBatchCount,
DriverBatchSizeLimit,
SaveTemps,
ShowDriverTimeCompilation,
std::move(StatsReporter),
OnlyOneDependencyFile);
// clang-format on
}
// Construct the graph of Actions.
SmallVector<const Action *, 8> TopLevelActions;
buildActions(TopLevelActions, TC, OI, *C);
if (Diags.hadAnyError() && !AllowErrors)
return nullptr;
if (DriverPrintActions) {
printActions(*C);
return nullptr;
}
buildJobs(TopLevelActions, OI, OFM ? &*OFM : nullptr,
workingDirectory, TC, *C);
if (DriverPrintDerivedOutputFileMap) {
C->getDerivedOutputFileMap().dump(llvm::outs(), true);
return nullptr;
}
// For getting bulk fixits, or for when users explicitly request to continue
// building despite errors.
if (ContinueBuildingAfterErrors)
C->setContinueBuildingAfterErrors();
if (ShowJobLifecycle)
C->setShowJobLifecycle();
if (Diags.hadAnyError() && !AllowErrors)
return nullptr;
if (DriverPrintBindings)
return nullptr;
return C;
}
static Arg *makeInputArg(const DerivedArgList &Args, OptTable &Opts,
StringRef Value) {
Arg *A = new Arg(Opts.getOption(options::OPT_INPUT), Value,
Args.getBaseArgs().MakeIndex(Value), Value.data());
A->claim();
return A;
}
using RemainingArgsHandler = llvm::function_ref<void(InputArgList &, unsigned)>;
std::unique_ptr<InputArgList>
parseArgsUntil(const llvm::opt::OptTable& Opts,
const char *const *ArgBegin,
const char *const *ArgEnd,
unsigned &MissingArgIndex,
unsigned &MissingArgCount,
unsigned FlagsToInclude,
unsigned FlagsToExclude,
llvm::opt::OptSpecifier UntilOption,
RemainingArgsHandler RemainingHandler) {
auto Args = std::make_unique<InputArgList>(ArgBegin, ArgEnd);
// FIXME: Handle '@' args (or at least error on them).
bool CheckUntil = UntilOption != options::OPT_INVALID;
MissingArgIndex = MissingArgCount = 0;
unsigned Index = 0, End = ArgEnd - ArgBegin;
while (Index < End) {
// Ignore empty arguments (other things may still take them as arguments).
StringRef Str = Args->getArgString(Index);
if (Str == "") {
++Index;
continue;
}
unsigned Prev = Index;
Arg *A = Opts.ParseOneArg(*Args, Index, FlagsToInclude, FlagsToExclude)
.release();
assert(Index > Prev && "Parser failed to consume argument.");
// Check for missing argument error.
if (!A) {
assert(Index >= End && "Unexpected parser error.");
assert(Index - Prev - 1 && "No missing arguments!");
MissingArgIndex = Prev;
MissingArgCount = Index - Prev - 1;
break;
}
Args->append(A);
if (CheckUntil && A->getOption().matches(UntilOption)) {
if (Index < End)
RemainingHandler(*Args, Index);
return Args;
}
}
return Args;
}
// Parse all args until we see an input, and then collect the remaining
// arguments into a synthesized "--" option.
static std::unique_ptr<InputArgList>
parseArgStringsForInteractiveDriver(const llvm::opt::OptTable& Opts,
ArrayRef<const char *> Args,
unsigned &MissingArgIndex,
unsigned &MissingArgCount,
unsigned FlagsToInclude,
unsigned FlagsToExclude) {
return parseArgsUntil(Opts, Args.begin(), Args.end(), MissingArgIndex,
MissingArgCount, FlagsToInclude, FlagsToExclude,
options::OPT_INPUT,
[&](InputArgList &Args, unsigned NextIndex) {
assert(NextIndex < Args.getNumInputArgStrings());
// Synthesize -- remaining args...
Arg *Remaining =
new Arg(Opts.getOption(options::OPT__DASH_DASH), "--", NextIndex);
for (unsigned N = Args.getNumInputArgStrings(); NextIndex != N;
++NextIndex) {
Remaining->getValues().push_back(Args.getArgString(NextIndex));
}
Args.append(Remaining);
});
}
std::unique_ptr<InputArgList>
Driver::parseArgStrings(ArrayRef<const char *> Args) {
unsigned IncludedFlagsBitmask = 0;
unsigned ExcludedFlagsBitmask = options::NoDriverOption;
unsigned MissingArgIndex, MissingArgCount;
std::unique_ptr<InputArgList> ArgList;
if (driverKind == DriverKind::Interactive) {
ArgList = parseArgStringsForInteractiveDriver(getOpts(), Args,
MissingArgIndex, MissingArgCount, IncludedFlagsBitmask,
ExcludedFlagsBitmask);
} else {
ArgList = std::make_unique<InputArgList>(
getOpts().ParseArgs(Args, MissingArgIndex, MissingArgCount,
IncludedFlagsBitmask, ExcludedFlagsBitmask));
}
assert(ArgList && "no argument list");
// Check for missing argument error.
if (MissingArgCount) {
Diags.diagnose(SourceLoc(), diag::error_missing_arg_value,
ArgList->getArgString(MissingArgIndex), MissingArgCount);
return nullptr;
}
// Check for unknown arguments.
for (const Arg *A : ArgList->filtered(options::OPT_UNKNOWN)) {
Diags.diagnose(SourceLoc(), diag::error_unknown_arg,
A->getAsString(*ArgList));
}
// Check for unsupported options
unsigned UnsupportedFlag = 0;
if (driverKind == DriverKind::Interactive)
UnsupportedFlag = options::NoInteractiveOption;
else if (driverKind == DriverKind::Batch)
UnsupportedFlag = options::NoBatchOption;
if (UnsupportedFlag)
for (const Arg *A : *ArgList)
if (A->getOption().hasFlag(UnsupportedFlag))
Diags.diagnose(SourceLoc(), diag::error_unsupported_option,
ArgList->getArgString(A->getIndex()), Name,
UnsupportedFlag == options::NoBatchOption ? "swift" : "swiftc");
return ArgList;
}
DerivedArgList *
Driver::translateInputAndPathArgs(const InputArgList &ArgList,
StringRef workingDirectory) const {
DerivedArgList *DAL = new DerivedArgList(ArgList);
auto addPath = [workingDirectory, DAL](Arg *A) {
assert(A->getNumValues() == 1 && "multiple values not handled");
StringRef path = A->getValue();
if (workingDirectory.empty() || path == "-" ||
llvm::sys::path::is_absolute(path)) {
DAL->append(A);
return;
}
SmallString<64> fullPath{workingDirectory};
llvm::sys::path::append(fullPath, path);
unsigned index = DAL->getBaseArgs().MakeIndex(fullPath);
Arg *newArg = new Arg(A->getOption(), A->getSpelling(), index,
DAL->getBaseArgs().getArgString(index), A);
DAL->AddSynthesizedArg(newArg);
DAL->append(newArg);
};
for (Arg *A : ArgList) {
if (A->getOption().hasFlag(options::ArgumentIsPath) ||
A->getOption().matches(options::OPT_INPUT)) {
addPath(A);
continue;
}
// If we're not in immediate mode, pick up inputs via the -- option.
if (driverKind != DriverKind::Interactive && A->getOption().matches(options::OPT__DASH_DASH)) {
A->claim();
for (unsigned i = 0, e = A->getNumValues(); i != e; ++i) {
addPath(makeInputArg(*DAL, *Opts, A->getValue(i)));
}
continue;
}
DAL->append(A);
}
return DAL;
}
/// Check that the file referenced by \p Input exists. If it doesn't,
/// issue a diagnostic and return false.
static bool checkInputExistence(const Driver &D, const DerivedArgList &Args,
DiagnosticEngine &Diags, StringRef Input) {
if (!D.getCheckInputFilesExist())
return true;
// stdin always exists.
if (Input == "-")
return true;
if (llvm::sys::fs::exists(Input))
return true;
Diags.diagnose(SourceLoc(), diag::error_no_such_file_or_directory, Input);
return false;
}
void Driver::buildInputs(const ToolChain &TC,
const DerivedArgList &Args,
InputFileList &Inputs) const {
llvm::DenseMap<StringRef, StringRef> SourceFileNames;
bool HasVFS = Args.hasArg(options::OPT_vfsoverlay);
for (Arg *A : Args) {
if (A->getOption().getKind() == Option::InputClass) {
StringRef Value = A->getValue();
file_types::ID Ty = file_types::TY_INVALID;
// stdin must be handled specially.
if (Value == "-") {
// By default, treat stdin as Swift input.
Ty = file_types::TY_Swift;
} else {
// Otherwise lookup by extension.
Ty = TC.lookupTypeForExtension(llvm::sys::path::extension(Value));
if (Ty == file_types::TY_INVALID) {
// By default, treat inputs with no extension, or with an
// extension that isn't recognized, as object files.
Ty = file_types::TY_Object;
}
}
if (HasVFS || checkInputExistence(*this, Args, Diags, Value))
Inputs.push_back(std::make_pair(Ty, A));
if (Ty == file_types::TY_Swift) {
StringRef Basename = llvm::sys::path::filename(Value);
if (!SourceFileNames.insert({Basename, Value}).second) {
Diags.diagnose(SourceLoc(), diag::error_two_files_same_name,
Basename, SourceFileNames[Basename], Value);
Diags.diagnose(SourceLoc(), diag::note_explain_two_files_same_name);
}
}
}
}
}
static bool maybeBuildingExecutable(const OutputInfo &OI,
const DerivedArgList &Args,
const InputFileList &Inputs) {
switch (OI.LinkAction) {
case LinkKind::Executable:
return true;
case LinkKind::DynamicLibrary:
return false;
case LinkKind::StaticLibrary:
return false;
case LinkKind::None: