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Driver.cpp
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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 - 2017 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/Strings.h"
#include "swift/AST/DiagnosticEngine.h"
#include "swift/AST/DiagnosticsDriver.h"
#include "swift/AST/DiagnosticsFrontend.h"
#include "swift/Basic/LLVM.h"
#include "swift/Basic/TaskQueue.h"
#include "swift/Basic/Version.h"
#include "swift/Basic/Range.h"
#include "swift/Basic/Statistic.h"
#include "swift/Driver/Action.h"
#include "swift/Driver/Compilation.h"
#include "swift/Driver/Job.h"
#include "swift/Driver/OutputFileMap.h"
#include "swift/Driver/ToolChain.h"
#include "swift/Option/Options.h"
#include "swift/Option/SanitizerOptions.h"
#include "swift/Parse/Lexer.h"
#include "swift/Config.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/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/MD5.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/raw_ostream.h"
#include "CompilationRecord.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;
std::string OptName;
// However, the driver kind may be overridden if the first argument is
// --driver-mode.
if (Args.size() > 0) {
OptName = getOpts().getOption(options::OPT_driver_mode).getPrefixedName();
StringRef FirstArg(Args[0]);
if (FirstArg.startswith(OptName))
DriverName = FirstArg.drop_front(OptName.size());
}
Optional<DriverKind> Kind =
llvm::StringSwitch<Optional<DriverKind>>(DriverName)
.Case("swift", DriverKind::Interactive)
.Case("swiftc", DriverKind::Batch)
.Case("swift-autolink-extract", DriverKind::AutolinkExtract)
.Case("swift-format", DriverKind::SwiftFormat)
.Default(None);
if (Kind.hasValue())
driverKind = Kind.getValue();
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;
const std::string OptName =
getOpts().getOption(options::OPT_driver_mode).getPrefixedName();
if (StringRef(Args[0]).startswith(OptName))
Args = Args.slice(1);
return Args;
}
static void validateArgs(DiagnosticEngine &diags, const ArgList &Args) {
if (Args.hasArgNoClaim(options::OPT_import_underlying_module) &&
Args.hasArgNoClaim(options::OPT_import_objc_header)) {
diags.diagnose({}, diag::error_framework_bridging_header);
}
// Check minimum supported OS versions.
if (const Arg *A = Args.getLastArg(options::OPT_target)) {
llvm::Triple triple(llvm::Triple::normalize(A->getValue()));
if (triple.isMacOSX()) {
if (triple.isMacOSXVersionLT(10, 9))
diags.diagnose(SourceLoc(), diag::error_os_minimum_deployment,
"OS X 10.9");
} else if (triple.isiOS()) {
if (triple.isTvOS()) {
if (triple.isOSVersionLT(9, 0)) {
diags.diagnose(SourceLoc(), diag::error_os_minimum_deployment,
"tvOS 9.0");
return;
}
}
if (triple.isOSVersionLT(7))
diags.diagnose(SourceLoc(), diag::error_os_minimum_deployment,
"iOS 7");
if (triple.isArch32Bit() && !triple.isOSVersionLT(11)) {
diags.diagnose(SourceLoc(), diag::error_ios_maximum_deployment_32,
triple.getOSMajorVersion());
}
} else if (triple.isWatchOS()) {
if (triple.isOSVersionLT(2, 0)) {
diags.diagnose(SourceLoc(), diag::error_os_minimum_deployment,
"watchOS 2.0");
return;
}
}
}
// Check for conflicting warning control flags
if (Args.hasArg(options::OPT_suppress_warnings) &&
Args.hasArg(options::OPT_warnings_as_errors)) {
diags.diagnose(SourceLoc(), diag::error_conflicting_options,
"-warnings-as-errors", "-suppress-warnings");
}
// Check for missing debug option when verifying debug info.
if (Args.hasArg(options::OPT_verify_debug_info)) {
bool hasDebugOption = true;
Arg *Arg = Args.getLastArg(swift::options::OPT_g_Group);
if (!Arg || Arg->getOption().matches(swift::options::OPT_gnone))
hasDebugOption = false;
if (!hasDebugOption)
diags.diagnose(SourceLoc(),
diag::verify_debug_info_requires_debug_option);
}
for (const Arg *A : Args.filtered(options::OPT_D)) {
StringRef name = A->getValue();
if (name.find('=') != StringRef::npos)
diags.diagnose(SourceLoc(),
diag::cannot_assign_value_to_conditional_compilation_flag,
name);
else if (!Lexer::isIdentifier(name))
diags.diagnose(SourceLoc(), diag::invalid_conditional_compilation_flag,
name);
}
}
/// Creates an appropriate ToolChain for a given driver and target triple.
///
/// This uses a std::unique_ptr instead of returning a toolchain by value
/// because ToolChain has virtual methods.
static std::unique_ptr<const ToolChain>
makeToolChain(Driver &driver, const llvm::Triple &target) {
switch (target.getOS()) {
case llvm::Triple::Darwin:
case llvm::Triple::MacOSX:
case llvm::Triple::IOS:
case llvm::Triple::TvOS:
case llvm::Triple::WatchOS:
return llvm::make_unique<toolchains::Darwin>(driver, target);
break;
case llvm::Triple::Linux:
if (target.isAndroid()) {
return llvm::make_unique<toolchains::Android>(driver, target);
} else {
return llvm::make_unique<toolchains::GenericUnix>(driver, target);
}
break;
case llvm::Triple::FreeBSD:
return llvm::make_unique<toolchains::GenericUnix>(driver, target);
break;
case llvm::Triple::Win32:
return llvm::make_unique<toolchains::Cygwin>(driver, target);
break;
default:
return nullptr;
}
}
static void computeArgsHash(SmallString<32> &out, const DerivedArgList &args) {
SmallVector<const Arg *, 32> interestingArgs;
interestingArgs.reserve(args.size());
std::copy_if(args.begin(), args.end(), std::back_inserter(interestingArgs),
[](const Arg *arg) {
return !arg->getOption().hasFlag(options::DoesNotAffectIncrementalBuild) &&
arg->getOption().getKind() != Option::InputClass;
});
llvm::array_pod_sort(interestingArgs.begin(), interestingArgs.end(),
[](const Arg * const *lhs, const Arg * const *rhs)->int {
auto cmpID = (*lhs)->getOption().getID() - (*rhs)->getOption().getID();
if (cmpID != 0)
return cmpID;
return (*lhs)->getIndex() - (*rhs)->getIndex();
});
llvm::MD5 hash;
for (const Arg *arg : interestingArgs) {
hash.update(arg->getOption().getID());
for (const char *value : const_cast<Arg *>(arg)->getValues())
hash.update(value);
}
llvm::MD5::MD5Result hashBuf;
hash.final(hashBuf);
llvm::MD5::stringifyResult(hashBuf, out);
}
class Driver::InputInfoMap
: public llvm::SmallDenseMap<const Arg *, CompileJobAction::InputInfo, 16> {
};
using InputInfoMap = Driver::InputInfoMap;
static bool failedToReadOutOfDateMap(bool ShowIncrementalBuildDecisions,
StringRef buildRecordPath,
StringRef reason = "") {
if (ShowIncrementalBuildDecisions) {
llvm::outs() << "Incremental compilation has been disabled due to "
<< "malformed build record file '" << buildRecordPath << "'.";
if (!reason.empty()) {
llvm::outs() << " " << reason;
}
llvm::outs() << "\n";
}
return true;
}
static bool populateOutOfDateMap(InputInfoMap &map, StringRef argsHashStr,
const InputFileList &inputs,
StringRef buildRecordPath,
bool ShowIncrementalBuildDecisions) {
// Treat a missing file as "no previous build".
auto buffer = llvm::MemoryBuffer::getFile(buildRecordPath);
if (!buffer)
return false;
namespace yaml = llvm::yaml;
using InputInfo = CompileJobAction::InputInfo;
llvm::SourceMgr SM;
yaml::Stream stream(buffer.get()->getMemBufferRef(), SM);
auto I = stream.begin();
if (I == stream.end() || !I->getRoot())
return failedToReadOutOfDateMap(ShowIncrementalBuildDecisions,
buildRecordPath);
auto *topLevelMap = dyn_cast<yaml::MappingNode>(I->getRoot());
if (!topLevelMap)
return failedToReadOutOfDateMap(ShowIncrementalBuildDecisions,
buildRecordPath);
SmallString<64> scratch;
llvm::StringMap<InputInfo> previousInputs;
bool versionValid = false;
bool optionsMatch = true;
auto readTimeValue = [&scratch](yaml::Node *node,
llvm::sys::TimePoint<> &timeValue) -> bool {
auto *seq = dyn_cast<yaml::SequenceNode>(node);
if (!seq)
return true;
auto seqI = seq->begin(), seqE = seq->end();
if (seqI == seqE)
return true;
auto *secondsRaw = dyn_cast<yaml::ScalarNode>(&*seqI);
if (!secondsRaw)
return true;
std::time_t parsedSeconds;
if (secondsRaw->getValue(scratch).getAsInteger(10, parsedSeconds))
return true;
++seqI;
if (seqI == seqE)
return true;
auto *nanosecondsRaw = dyn_cast<yaml::ScalarNode>(&*seqI);
if (!nanosecondsRaw)
return true;
std::chrono::system_clock::rep parsedNanoseconds;
if (nanosecondsRaw->getValue(scratch).getAsInteger(10, parsedNanoseconds))
return true;
++seqI;
if (seqI != seqE)
return true;
timeValue = llvm::sys::TimePoint<>(std::chrono::seconds(parsedSeconds));
timeValue += std::chrono::nanoseconds(parsedNanoseconds);
return false;
};
// FIXME: LLVM's YAML support does incremental parsing in such a way that
// for-range loops break.
SmallString<64> CompilationRecordSwiftVersion;
for (auto i = topLevelMap->begin(), e = topLevelMap->end(); i != e; ++i) {
auto *key = cast<yaml::ScalarNode>(i->getKey());
StringRef keyStr = key->getValue(scratch);
using compilation_record::TopLevelKey;
if (keyStr == compilation_record::getName(TopLevelKey::Version)) {
auto *value = dyn_cast<yaml::ScalarNode>(i->getValue());
if (!value) {
auto reason = ("Malformed value for key '" + keyStr + "'.")
.toStringRef(scratch);
return failedToReadOutOfDateMap(ShowIncrementalBuildDecisions,
buildRecordPath, reason);
}
// NB: We check against
// swift::version::Version::getCurrentLanguageVersion() here because any
// -swift-version argument is handled in the argsHashStr check that
// follows.
CompilationRecordSwiftVersion = value->getValue(scratch);
versionValid = (CompilationRecordSwiftVersion
== version::getSwiftFullVersion(
version::Version::getCurrentLanguageVersion()));
} else if (keyStr == compilation_record::getName(TopLevelKey::Options)) {
auto *value = dyn_cast<yaml::ScalarNode>(i->getValue());
if (!value)
return true;
optionsMatch = (argsHashStr == value->getValue(scratch));
} else if (keyStr == compilation_record::getName(TopLevelKey::BuildTime)) {
auto *value = dyn_cast<yaml::SequenceNode>(i->getValue());
if (!value) {
auto reason = ("Malformed value for key '" + keyStr + "'.")
.toStringRef(scratch);
return failedToReadOutOfDateMap(ShowIncrementalBuildDecisions,
buildRecordPath, reason);
}
llvm::sys::TimePoint<> timeVal;
if (readTimeValue(i->getValue(), timeVal))
return true;
map[nullptr] = { InputInfo::NeedsCascadingBuild, timeVal };
} else if (keyStr == compilation_record::getName(TopLevelKey::Inputs)) {
auto *inputMap = dyn_cast<yaml::MappingNode>(i->getValue());
if (!inputMap) {
auto reason = ("Malformed value for key '" + keyStr + "'.")
.toStringRef(scratch);
return failedToReadOutOfDateMap(ShowIncrementalBuildDecisions,
buildRecordPath, reason);
}
// FIXME: LLVM's YAML support does incremental parsing in such a way that
// for-range loops break.
for (auto i = inputMap->begin(), e = inputMap->end(); i != e; ++i) {
auto *key = dyn_cast<yaml::ScalarNode>(i->getKey());
if (!key)
return true;
auto *value = dyn_cast<yaml::SequenceNode>(i->getValue());
if (!value)
return true;
using compilation_record::getInfoStatusForIdentifier;
auto previousBuildState =
getInfoStatusForIdentifier(value->getRawTag());
if (!previousBuildState)
return true;
llvm::sys::TimePoint<> timeValue;
if (readTimeValue(value, timeValue))
return true;
auto inputName = key->getValue(scratch);
previousInputs[inputName] = { *previousBuildState, timeValue };
}
}
}
if (!versionValid) {
if (ShowIncrementalBuildDecisions) {
auto v = version::getSwiftFullVersion(
version::Version::getCurrentLanguageVersion());
llvm::outs() << "Incremental compilation has been disabled, due to a "
<< "compiler version mismatch.\n"
<< "\tCompiling with: " << v << "\n"
<< "\tPreviously compiled with: "
<< CompilationRecordSwiftVersion << "\n";
}
return true;
}
if (!optionsMatch) {
if (ShowIncrementalBuildDecisions) {
llvm::outs() << "Incremental compilation has been disabled, because "
<< "different arguments were passed to the compiler.\n";
}
return true;
}
size_t numInputsFromPrevious = 0;
for (auto &inputPair : inputs) {
auto iter = previousInputs.find(inputPair.second->getValue());
if (iter == previousInputs.end()) {
map[inputPair.second] = InputInfo::makeNewlyAdded();
continue;
}
++numInputsFromPrevious;
map[inputPair.second] = iter->getValue();
}
if (numInputsFromPrevious == previousInputs.size()) {
return false;
} else {
// If a file was removed, we've lost its dependency info. Rebuild everything.
// FIXME: Can we do better?
if (ShowIncrementalBuildDecisions) {
llvm::StringSet<> inputArgs;
for (auto &inputPair : inputs) {
inputArgs.insert(inputPair.second->getValue());
}
SmallVector<StringRef, 8> missingInputs;
for (auto &previousInput : previousInputs) {
auto previousInputArg = previousInput.getKey();
if (inputArgs.find(previousInputArg) == inputArgs.end()) {
missingInputs.push_back(previousInputArg);
}
}
llvm::outs() << "Incremental compilation has been disabled, because "
<< "the following inputs were used in the previous "
<< "compilation, but not in the current compilation:\n";
for (auto &missing : missingInputs) {
llvm::outs() << "\t" << missing << "\n";
}
}
return true;
}
}
// warn if -embed-bitcode is set and the output type is not an object
static void validateEmbedBitcode(DerivedArgList &Args, OutputInfo &OI,
DiagnosticEngine &Diags) {
if (Args.hasArg(options::OPT_embed_bitcode) &&
OI.CompilerOutputType != types::TY_Object) {
Diags.diagnose(SourceLoc(), diag::warn_ignore_embed_bitcode);
Args.eraseArg(options::OPT_embed_bitcode);
}
}
std::unique_ptr<Compilation> Driver::buildCompilation(
ArrayRef<const char *> Args) {
llvm::PrettyStackTraceString CrashInfo("Compilation construction");
llvm::sys::TimePoint<> StartTime = std::chrono::system_clock::now();
std::unique_ptr<InputArgList> ArgList(parseArgStrings(Args.slice(1)));
if (Diags.hadAnyError())
return nullptr;
// Claim --driver-mode here, since it's already been handled.
(void) ArgList->hasArg(options::OPT_driver_mode);
bool DriverPrintActions = ArgList->hasArg(options::OPT_driver_print_actions);
bool DriverPrintOutputFileMap =
ArgList->hasArg(options::OPT_driver_print_output_file_map);
DriverPrintBindings = ArgList->hasArg(options::OPT_driver_print_bindings);
bool DriverPrintJobs = ArgList->hasArg(options::OPT_driver_print_jobs);
bool DriverSkipExecution =
ArgList->hasArg(options::OPT_driver_skip_execution);
bool ShowIncrementalBuildDecisions =
ArgList->hasArg(options::OPT_driver_show_incremental);
bool ShowJobLifecycle =
ArgList->hasArg(options::OPT_driver_show_job_lifecycle);
bool Incremental = ArgList->hasArg(options::OPT_incremental);
if (ArgList->hasArg(options::OPT_whole_module_optimization)) {
if (Incremental && ShowIncrementalBuildDecisions) {
llvm::outs() << "Incremental compilation has been disabled, because it "
<< "is not compatible with whole module optimization.";
}
Incremental = false;
}
if (ArgList->hasArg(options::OPT_embed_bitcode)) {
if (Incremental && ShowIncrementalBuildDecisions) {
llvm::outs() << "Incremental compilation has been disabled, because it "
<< "is not currently compatible with embedding LLVM IR "
<< "bitcode.";
}
Incremental = false;
}
bool SaveTemps = ArgList->hasArg(options::OPT_save_temps);
bool ContinueBuildingAfterErrors =
ArgList->hasArg(options::OPT_continue_building_after_errors);
bool ShowDriverTimeCompilation =
ArgList->hasArg(options::OPT_driver_time_compilation);
std::unique_ptr<DerivedArgList> TranslatedArgList(
translateInputArgs(*ArgList));
if (const Arg *A = ArgList->getLastArg(options::OPT_target))
DefaultTargetTriple = llvm::Triple::normalize(A->getValue());
validateArgs(Diags, *TranslatedArgList);
if (Diags.hadAnyError())
return nullptr;
std::unique_ptr<const ToolChain> TC =
makeToolChain(*this, llvm::Triple(DefaultTargetTriple));
if (!TC) {
Diags.diagnose(SourceLoc(), diag::error_unknown_target,
ArgList->getLastArg(options::OPT_target)->getValue());
return nullptr;
}
if (!handleImmediateArgs(*TranslatedArgList, *TC)) {
return nullptr;
}
// Construct the list of inputs.
InputFileList Inputs;
buildInputs(*TC, *TranslatedArgList, Inputs);
if (Diags.hadAnyError())
return nullptr;
// Determine the OutputInfo for the driver.
OutputInfo OI;
buildOutputInfo(*TC, *TranslatedArgList, Inputs, OI);
if (Diags.hadAnyError())
return nullptr;
std::unique_ptr<UnifiedStatsReporter> StatsReporter;
if (const Arg *A =
ArgList->getLastArgNoClaim(options::OPT_stats_output_dir)) {
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 = types::getTypeTempSuffix(OI.CompilerOutputType);
StatsReporter = llvm::make_unique<UnifiedStatsReporter>("swift-driver",
OI.ModuleName,
InputName,
DefaultTargetTriple,
OutputType,
OptType,
A->getValue());
}
assert(OI.CompilerOutputType != types::ID::TY_INVALID &&
"buildOutputInfo() must set a valid output type!");
validateEmbedBitcode(*TranslatedArgList, OI, Diags);
if (OI.CompilerMode == OutputInfo::Mode::REPL)
// REPL mode expects no input files, so suppress the error.
SuppressNoInputFilesError = true;
std::unique_ptr<OutputFileMap> OFM = buildOutputFileMap(*TranslatedArgList);
if (Diags.hadAnyError())
return nullptr;
if (DriverPrintOutputFileMap) {
if (OFM)
OFM->dump(llvm::errs(), true);
else
Diags.diagnose(SourceLoc(), diag::error_no_output_file_map_specified);
return nullptr;
}
SmallString<32> ArgsHash;
computeArgsHash(ArgsHash, *TranslatedArgList);
InputInfoMap outOfDateMap;
bool rebuildEverything = true;
if (Incremental) {
if (!OFM) {
// FIXME: This should work without an output file map. We should have
// another way to specify a build record and where to put intermediates.
Diags.diagnose(SourceLoc(), diag::incremental_requires_output_file_map);
} else {
StringRef buildRecordPath;
if (auto *masterOutputMap = OFM->getOutputMapForSingleOutput()) {
auto iter = masterOutputMap->find(types::TY_SwiftDeps);
if (iter != masterOutputMap->end())
buildRecordPath = iter->second;
}
if (buildRecordPath.empty()) {
Diags.diagnose(SourceLoc(),
diag::incremental_requires_build_record_entry,
types::getTypeName(types::TY_SwiftDeps));
rebuildEverything = true;
} else {
if (populateOutOfDateMap(outOfDateMap, ArgsHash, Inputs,
buildRecordPath,
ShowIncrementalBuildDecisions)) {
// FIXME: Distinguish errors from "file removed", which is benign.
} else {
rebuildEverything = false;
}
}
}
}
// Construct the graph of Actions.
ActionList Actions;
buildActions(*TC, *TranslatedArgList, Inputs, OI, OFM.get(),
rebuildEverything ? nullptr : &outOfDateMap, Actions);
if (Diags.hadAnyError())
return nullptr;
if (DriverPrintActions) {
printActions(Actions);
return nullptr;
}
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;
}
}
OutputLevel Level = OutputLevel::Normal;
if (const Arg *A = ArgList->getLastArg(options::OPT_v,
options::OPT_parseable_output)) {
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!");
}
std::unique_ptr<Compilation> C(new Compilation(Diags, Level,
std::move(ArgList),
std::move(TranslatedArgList),
std::move(Inputs),
ArgsHash, StartTime,
NumberOfParallelCommands,
Incremental,
DriverSkipExecution,
SaveTemps,
ShowDriverTimeCompilation,
std::move(StatsReporter)));
buildJobs(Actions, OI, OFM.get(), *TC, *C);
// For getting bulk fixits, or for when users explicitly request to continue
// building despite errors.
if (ContinueBuildingAfterErrors)
C->setContinueBuildingAfterErrors();
if (ShowIncrementalBuildDecisions || ShowJobLifecycle)
C->setShowsIncrementalBuildDecisions();
if (ShowJobLifecycle)
C->setShowJobLifecycle();
// This has to happen after building jobs, because otherwise we won't even
// emit .swiftdeps files for the next build.
if (rebuildEverything)
C->disableIncrementalBuild();
if (OFM) {
if (auto *masterOutputMap = OFM->getOutputMapForSingleOutput()) {
C->setCompilationRecordPath(masterOutputMap->lookup(types::TY_SwiftDeps));
auto buildEntry = outOfDateMap.find(nullptr);
if (buildEntry != outOfDateMap.end())
C->setLastBuildTime(buildEntry->second.previousModTime);
}
}
if (Diags.hadAnyError())
return nullptr;
if (DriverPrintBindings)
return nullptr;
if (DriverPrintJobs) {
printJobs(*C);
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;
}
typedef std::function<void(InputArgList &, unsigned)> RemainingArgsHandler;
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 = llvm::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);
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 = llvm::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::translateInputArgs(const InputArgList &ArgList) const {
DerivedArgList *DAL = new DerivedArgList(ArgList);
for (Arg *A : ArgList) {
// 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) {
DAL->append(makeInputArg(*DAL, *Opts, A->getValue(i)));
}
continue;
}
DAL->append(A);
}
return DAL;
}
/// \brief 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 {
types::ID InputType = types::TY_Nothing;
Arg *InputTypeArg = nullptr;
llvm::StringMap<StringRef> SourceFileNames;
for (Arg *A : Args) {
if (A->getOption().getKind() == Option::InputClass) {
StringRef Value = A->getValue();
types::ID Ty = types::TY_INVALID;
if (InputType == types::TY_Nothing) {
// If there was an explicit arg for this, claim it.
if (InputTypeArg)
InputTypeArg->claim();
// stdin must be handled specially.
if (Value.equals("-")) {
// By default, treat stdin as Swift input.
// FIXME: should we limit this inference to specific modes?
Ty = types::TY_Swift;
} else {
// Otherwise lookup by extension.
Ty = TC.lookupTypeForExtension(llvm::sys::path::extension(Value));
if (Ty == types::TY_INVALID) {
// FIXME: should we adjust this inference in certain modes?
Ty = types::TY_Object;
}
}
} else {
assert(InputTypeArg && "InputType set w/o InputTypeArg");
InputTypeArg->claim();
Ty = InputType;
}
if (checkInputExistence(*this, Args, Diags, Value))
Inputs.push_back(std::make_pair(Ty, A));
if (Ty == 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);
}
}
}
// FIXME: add -x support (or equivalent)
}
}
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::None:
break;
}
if (Args.hasArg(options::OPT_parse_as_library, options::OPT_parse_stdlib))
return false;
return Inputs.size() == 1;
}
static void diagnoseOutputModeArg(DiagnosticEngine &diags, const Arg *arg,
bool hasInputs, const DerivedArgList &args,
bool isInteractiveDriver,
StringRef driverName) {
switch (arg->getOption().getID()) {
case options::OPT_i:
diags.diagnose(SourceLoc(), diag::error_i_mode,
isInteractiveDriver ? driverName : "swift");
break;
case options::OPT_repl:
if (isInteractiveDriver && !hasInputs)
diags.diagnose(SourceLoc(), diag::warning_unnecessary_repl_mode,
args.getArgString(arg->getIndex()), driverName);
break;