//===--- ToolChain.cpp - Collections of tools for one platform ------------===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// #include "Tools.h" #include "clang/Basic/ObjCRuntime.h" #include "clang/Driver/Action.h" #include "clang/Driver/Driver.h" #include "clang/Driver/DriverDiagnostic.h" #include "clang/Driver/Options.h" #include "clang/Driver/SanitizerArgs.h" #include "clang/Driver/ToolChain.h" #include "llvm/ADT/SmallString.h" #include "llvm/ADT/StringSwitch.h" #include "llvm/Option/Arg.h" #include "llvm/Option/ArgList.h" #include "llvm/Option/Option.h" #include "llvm/Support/ErrorHandling.h" #include "llvm/Support/FileSystem.h" using namespace clang::driver; using namespace clang; using namespace llvm::opt; static llvm::opt::Arg *GetRTTIArgument(const ArgList &Args) { return Args.getLastArg(options::OPT_mkernel, options::OPT_fapple_kext, options::OPT_fno_rtti, options::OPT_frtti); } static ToolChain::RTTIMode CalculateRTTIMode(const ArgList &Args, const llvm::Triple &Triple, const Arg *CachedRTTIArg) { // Explicit rtti/no-rtti args if (CachedRTTIArg) { if (CachedRTTIArg->getOption().matches(options::OPT_frtti)) return ToolChain::RM_EnabledExplicitly; else return ToolChain::RM_DisabledExplicitly; } // -frtti is default, except for the PS4 CPU. if (!Triple.isPS4CPU()) return ToolChain::RM_EnabledImplicitly; // On the PS4, turning on c++ exceptions turns on rtti. // We're assuming that, if we see -fexceptions, rtti gets turned on. Arg *Exceptions = Args.getLastArgNoClaim( options::OPT_fcxx_exceptions, options::OPT_fno_cxx_exceptions, options::OPT_fexceptions, options::OPT_fno_exceptions); if (Exceptions && (Exceptions->getOption().matches(options::OPT_fexceptions) || Exceptions->getOption().matches(options::OPT_fcxx_exceptions))) return ToolChain::RM_EnabledImplicitly; return ToolChain::RM_DisabledImplicitly; } ToolChain::ToolChain(const Driver &D, const llvm::Triple &T, const ArgList &Args) : D(D), Triple(T), Args(Args), CachedRTTIArg(GetRTTIArgument(Args)), CachedRTTIMode(CalculateRTTIMode(Args, Triple, CachedRTTIArg)) { if (Arg *A = Args.getLastArg(options::OPT_mthread_model)) if (!isThreadModelSupported(A->getValue())) D.Diag(diag::err_drv_invalid_thread_model_for_target) << A->getValue() << A->getAsString(Args); } ToolChain::~ToolChain() { } const Driver &ToolChain::getDriver() const { return D; } bool ToolChain::useIntegratedAs() const { return Args.hasFlag(options::OPT_fintegrated_as, options::OPT_fno_integrated_as, IsIntegratedAssemblerDefault()); } const SanitizerArgs& ToolChain::getSanitizerArgs() const { if (!SanitizerArguments.get()) SanitizerArguments.reset(new SanitizerArgs(*this, Args)); return *SanitizerArguments.get(); } StringRef ToolChain::getDefaultUniversalArchName() const { // In universal driver terms, the arch name accepted by -arch isn't exactly // the same as the ones that appear in the triple. Roughly speaking, this is // an inverse of the darwin::getArchTypeForDarwinArchName() function, but the // only interesting special case is powerpc. switch (Triple.getArch()) { case llvm::Triple::ppc: return "ppc"; case llvm::Triple::ppc64: return "ppc64"; case llvm::Triple::ppc64le: return "ppc64le"; default: return Triple.getArchName(); } } bool ToolChain::IsUnwindTablesDefault() const { return false; } Tool *ToolChain::getClang() const { if (!Clang) Clang.reset(new tools::Clang(*this)); return Clang.get(); } Tool *ToolChain::buildAssembler() const { return new tools::ClangAs(*this); } Tool *ToolChain::buildLinker() const { llvm_unreachable("Linking is not supported by this toolchain"); } Tool *ToolChain::getAssemble() const { if (!Assemble) Assemble.reset(buildAssembler()); return Assemble.get(); } Tool *ToolChain::getClangAs() const { if (!Assemble) Assemble.reset(new tools::ClangAs(*this)); return Assemble.get(); } Tool *ToolChain::getLink() const { if (!Link) Link.reset(buildLinker()); return Link.get(); } Tool *ToolChain::getTool(Action::ActionClass AC) const { switch (AC) { case Action::AssembleJobClass: return getAssemble(); case Action::LinkJobClass: return getLink(); case Action::InputClass: case Action::BindArchClass: case Action::LipoJobClass: case Action::DsymutilJobClass: case Action::VerifyDebugInfoJobClass: llvm_unreachable("Invalid tool kind."); case Action::CompileJobClass: case Action::PrecompileJobClass: case Action::PreprocessJobClass: case Action::AnalyzeJobClass: case Action::MigrateJobClass: case Action::VerifyPCHJobClass: case Action::BackendJobClass: return getClang(); } llvm_unreachable("Invalid tool kind."); } Tool *ToolChain::SelectTool(const JobAction &JA) const { if (getDriver().ShouldUseClangCompiler(JA)) return getClang(); Action::ActionClass AC = JA.getKind(); if (AC == Action::AssembleJobClass && useIntegratedAs()) return getClangAs(); return getTool(AC); } std::string ToolChain::GetFilePath(const char *Name) const { return D.GetFilePath(Name, *this); } std::string ToolChain::GetProgramPath(const char *Name) const { return D.GetProgramPath(Name, *this); } std::string ToolChain::GetLinkerPath() const { if (Arg *A = Args.getLastArg(options::OPT_fuse_ld_EQ)) { StringRef Suffix = A->getValue(); // If we're passed -fuse-ld= with no argument, or with the argument ld, // then use whatever the default system linker is. if (Suffix.empty() || Suffix == "ld") return GetProgramPath("ld"); llvm::SmallString<8> LinkerName("ld."); LinkerName.append(Suffix); std::string LinkerPath(GetProgramPath(LinkerName.c_str())); if (llvm::sys::fs::exists(LinkerPath)) return LinkerPath; getDriver().Diag(diag::err_drv_invalid_linker_name) << A->getAsString(Args); return ""; } return GetProgramPath("ld"); } types::ID ToolChain::LookupTypeForExtension(const char *Ext) const { return types::lookupTypeForExtension(Ext); } bool ToolChain::HasNativeLLVMSupport() const { return false; } bool ToolChain::isCrossCompiling() const { llvm::Triple HostTriple(LLVM_HOST_TRIPLE); switch (HostTriple.getArch()) { // The A32/T32/T16 instruction sets are not separate architectures in this // context. case llvm::Triple::arm: case llvm::Triple::armeb: case llvm::Triple::thumb: case llvm::Triple::thumbeb: return getArch() != llvm::Triple::arm && getArch() != llvm::Triple::thumb && getArch() != llvm::Triple::armeb && getArch() != llvm::Triple::thumbeb; default: return HostTriple.getArch() != getArch(); } } ObjCRuntime ToolChain::getDefaultObjCRuntime(bool isNonFragile) const { return ObjCRuntime(isNonFragile ? ObjCRuntime::GNUstep : ObjCRuntime::GCC, VersionTuple()); } bool ToolChain::isThreadModelSupported(const StringRef Model) const { if (Model == "single") { // FIXME: 'single' is only supported on ARM so far. return Triple.getArch() == llvm::Triple::arm || Triple.getArch() == llvm::Triple::armeb || Triple.getArch() == llvm::Triple::thumb || Triple.getArch() == llvm::Triple::thumbeb; } else if (Model == "posix") return true; return false; } std::string ToolChain::ComputeLLVMTriple(const ArgList &Args, types::ID InputType) const { switch (getTriple().getArch()) { default: return getTripleString(); case llvm::Triple::x86_64: { llvm::Triple Triple = getTriple(); if (!Triple.isOSBinFormatMachO()) return getTripleString(); if (Arg *A = Args.getLastArg(options::OPT_march_EQ)) { // x86_64h goes in the triple. Other -march options just use the // vanilla triple we already have. StringRef MArch = A->getValue(); if (MArch == "x86_64h") Triple.setArchName(MArch); } return Triple.getTriple(); } case llvm::Triple::aarch64: { llvm::Triple Triple = getTriple(); if (!Triple.isOSBinFormatMachO()) return getTripleString(); // FIXME: older versions of ld64 expect the "arm64" component in the actual // triple string and query it to determine whether an LTO file can be // handled. Remove this when we don't care any more. Triple.setArchName("arm64"); return Triple.getTriple(); } case llvm::Triple::arm: case llvm::Triple::armeb: case llvm::Triple::thumb: case llvm::Triple::thumbeb: { // FIXME: Factor into subclasses. llvm::Triple Triple = getTriple(); bool IsBigEndian = getTriple().getArch() == llvm::Triple::armeb || getTriple().getArch() == llvm::Triple::thumbeb; // Handle pseudo-target flags '-mlittle-endian'/'-EL' and // '-mbig-endian'/'-EB'. if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian, options::OPT_mbig_endian)) { IsBigEndian = !A->getOption().matches(options::OPT_mlittle_endian); } // Thumb2 is the default for V7 on Darwin. // // FIXME: Thumb should just be another -target-feaure, not in the triple. StringRef Suffix = Triple.isOSBinFormatMachO() ? tools::arm::getLLVMArchSuffixForARM(tools::arm::getARMCPUForMArch(Args, Triple)) : tools::arm::getLLVMArchSuffixForARM(tools::arm::getARMTargetCPU(Args, Triple)); bool ThumbDefault = Suffix.startswith("v6m") || Suffix.startswith("v7m") || Suffix.startswith("v7em") || (Suffix.startswith("v7") && getTriple().isOSBinFormatMachO()); // FIXME: this is invalid for WindowsCE if (getTriple().isOSWindows()) ThumbDefault = true; std::string ArchName; if (IsBigEndian) ArchName = "armeb"; else ArchName = "arm"; // Assembly files should start in ARM mode. if (InputType != types::TY_PP_Asm && Args.hasFlag(options::OPT_mthumb, options::OPT_mno_thumb, ThumbDefault)) { if (IsBigEndian) ArchName = "thumbeb"; else ArchName = "thumb"; } Triple.setArchName(ArchName + Suffix.str()); return Triple.getTriple(); } } } std::string ToolChain::ComputeEffectiveClangTriple(const ArgList &Args, types::ID InputType) const { return ComputeLLVMTriple(Args, InputType); } void ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs, ArgStringList &CC1Args) const { // Each toolchain should provide the appropriate include flags. } void ToolChain::addClangTargetOptions(const ArgList &DriverArgs, ArgStringList &CC1Args) const { } void ToolChain::addClangWarningOptions(ArgStringList &CC1Args) const {} ToolChain::RuntimeLibType ToolChain::GetRuntimeLibType( const ArgList &Args) const { if (Arg *A = Args.getLastArg(options::OPT_rtlib_EQ)) { StringRef Value = A->getValue(); if (Value == "compiler-rt") return ToolChain::RLT_CompilerRT; if (Value == "libgcc") return ToolChain::RLT_Libgcc; getDriver().Diag(diag::err_drv_invalid_rtlib_name) << A->getAsString(Args); } return GetDefaultRuntimeLibType(); } ToolChain::CXXStdlibType ToolChain::GetCXXStdlibType(const ArgList &Args) const{ if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) { StringRef Value = A->getValue(); if (Value == "libc++") return ToolChain::CST_Libcxx; if (Value == "libstdc++") return ToolChain::CST_Libstdcxx; getDriver().Diag(diag::err_drv_invalid_stdlib_name) << A->getAsString(Args); } return ToolChain::CST_Libstdcxx; } /// \brief Utility function to add a system include directory to CC1 arguments. /*static*/ void ToolChain::addSystemInclude(const ArgList &DriverArgs, ArgStringList &CC1Args, const Twine &Path) { CC1Args.push_back("-internal-isystem"); CC1Args.push_back(DriverArgs.MakeArgString(Path)); } /// \brief Utility function to add a system include directory with extern "C" /// semantics to CC1 arguments. /// /// Note that this should be used rarely, and only for directories that /// historically and for legacy reasons are treated as having implicit extern /// "C" semantics. These semantics are *ignored* by and large today, but its /// important to preserve the preprocessor changes resulting from the /// classification. /*static*/ void ToolChain::addExternCSystemInclude(const ArgList &DriverArgs, ArgStringList &CC1Args, const Twine &Path) { CC1Args.push_back("-internal-externc-isystem"); CC1Args.push_back(DriverArgs.MakeArgString(Path)); } void ToolChain::addExternCSystemIncludeIfExists(const ArgList &DriverArgs, ArgStringList &CC1Args, const Twine &Path) { if (llvm::sys::fs::exists(Path)) addExternCSystemInclude(DriverArgs, CC1Args, Path); } /// \brief Utility function to add a list of system include directories to CC1. /*static*/ void ToolChain::addSystemIncludes(const ArgList &DriverArgs, ArgStringList &CC1Args, ArrayRef<StringRef> Paths) { for (ArrayRef<StringRef>::iterator I = Paths.begin(), E = Paths.end(); I != E; ++I) { CC1Args.push_back("-internal-isystem"); CC1Args.push_back(DriverArgs.MakeArgString(*I)); } } void ToolChain::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs, ArgStringList &CC1Args) const { // Header search paths should be handled by each of the subclasses. // Historically, they have not been, and instead have been handled inside of // the CC1-layer frontend. As the logic is hoisted out, this generic function // will slowly stop being called. // // While it is being called, replicate a bit of a hack to propagate the // '-stdlib=' flag down to CC1 so that it can in turn customize the C++ // header search paths with it. Once all systems are overriding this // function, the CC1 flag and this line can be removed. DriverArgs.AddAllArgs(CC1Args, options::OPT_stdlib_EQ); } void ToolChain::AddCXXStdlibLibArgs(const ArgList &Args, ArgStringList &CmdArgs) const { CXXStdlibType Type = GetCXXStdlibType(Args); switch (Type) { case ToolChain::CST_Libcxx: CmdArgs.push_back("-lc++"); break; case ToolChain::CST_Libstdcxx: CmdArgs.push_back("-lstdc++"); break; } } void ToolChain::AddCCKextLibArgs(const ArgList &Args, ArgStringList &CmdArgs) const { CmdArgs.push_back("-lcc_kext"); } bool ToolChain::AddFastMathRuntimeIfAvailable(const ArgList &Args, ArgStringList &CmdArgs) const { // Do not check for -fno-fast-math or -fno-unsafe-math when -Ofast passed // (to keep the linker options consistent with gcc and clang itself). if (!isOptimizationLevelFast(Args)) { // Check if -ffast-math or -funsafe-math. Arg *A = Args.getLastArg(options::OPT_ffast_math, options::OPT_fno_fast_math, options::OPT_funsafe_math_optimizations, options::OPT_fno_unsafe_math_optimizations); if (!A || A->getOption().getID() == options::OPT_fno_fast_math || A->getOption().getID() == options::OPT_fno_unsafe_math_optimizations) return false; } // If crtfastmath.o exists add it to the arguments. std::string Path = GetFilePath("crtfastmath.o"); if (Path == "crtfastmath.o") // Not found. return false; CmdArgs.push_back(Args.MakeArgString(Path)); return true; }