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Diffstat (limited to 'clang/lib/Driver/ToolChains/Linux.cpp')
| -rw-r--r-- | clang/lib/Driver/ToolChains/Linux.cpp | 1046 |
1 files changed, 1046 insertions, 0 deletions
diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp new file mode 100644 index 000000000000..087783875ffe --- /dev/null +++ b/clang/lib/Driver/ToolChains/Linux.cpp @@ -0,0 +1,1046 @@ +//===--- Linux.h - Linux ToolChain Implementations --------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +#include "Linux.h" +#include "Arch/ARM.h" +#include "Arch/Mips.h" +#include "Arch/PPC.h" +#include "Arch/RISCV.h" +#include "CommonArgs.h" +#include "clang/Config/config.h" +#include "clang/Driver/Distro.h" +#include "clang/Driver/Driver.h" +#include "clang/Driver/Options.h" +#include "clang/Driver/SanitizerArgs.h" +#include "llvm/Option/ArgList.h" +#include "llvm/ProfileData/InstrProf.h" +#include "llvm/Support/Path.h" +#include "llvm/Support/ScopedPrinter.h" +#include "llvm/Support/VirtualFileSystem.h" +#include <system_error> + +using namespace clang::driver; +using namespace clang::driver::toolchains; +using namespace clang; +using namespace llvm::opt; + +using tools::addPathIfExists; + +/// Get our best guess at the multiarch triple for a target. +/// +/// Debian-based systems are starting to use a multiarch setup where they use +/// a target-triple directory in the library and header search paths. +/// Unfortunately, this triple does not align with the vanilla target triple, +/// so we provide a rough mapping here. +static std::string getMultiarchTriple(const Driver &D, + const llvm::Triple &TargetTriple, + StringRef SysRoot) { + llvm::Triple::EnvironmentType TargetEnvironment = + TargetTriple.getEnvironment(); + bool IsAndroid = TargetTriple.isAndroid(); + bool IsMipsR6 = TargetTriple.getSubArch() == llvm::Triple::MipsSubArch_r6; + bool IsMipsN32Abi = TargetTriple.getEnvironment() == llvm::Triple::GNUABIN32; + + // For most architectures, just use whatever we have rather than trying to be + // clever. + switch (TargetTriple.getArch()) { + default: + break; + + // We use the existence of '/lib/<triple>' as a directory to detect some + // common linux triples that don't quite match the Clang triple for both + // 32-bit and 64-bit targets. Multiarch fixes its install triples to these + // regardless of what the actual target triple is. + case llvm::Triple::arm: + case llvm::Triple::thumb: + if (IsAndroid) { + return "arm-linux-androideabi"; + } else if (TargetEnvironment == llvm::Triple::GNUEABIHF) { + if (D.getVFS().exists(SysRoot + "/lib/arm-linux-gnueabihf")) + return "arm-linux-gnueabihf"; + } else { + if (D.getVFS().exists(SysRoot + "/lib/arm-linux-gnueabi")) + return "arm-linux-gnueabi"; + } + break; + case llvm::Triple::armeb: + case llvm::Triple::thumbeb: + if (TargetEnvironment == llvm::Triple::GNUEABIHF) { + if (D.getVFS().exists(SysRoot + "/lib/armeb-linux-gnueabihf")) + return "armeb-linux-gnueabihf"; + } else { + if (D.getVFS().exists(SysRoot + "/lib/armeb-linux-gnueabi")) + return "armeb-linux-gnueabi"; + } + break; + case llvm::Triple::x86: + if (IsAndroid) + return "i686-linux-android"; + if (D.getVFS().exists(SysRoot + "/lib/i386-linux-gnu")) + return "i386-linux-gnu"; + break; + case llvm::Triple::x86_64: + if (IsAndroid) + return "x86_64-linux-android"; + // We don't want this for x32, otherwise it will match x86_64 libs + if (TargetEnvironment != llvm::Triple::GNUX32 && + D.getVFS().exists(SysRoot + "/lib/x86_64-linux-gnu")) + return "x86_64-linux-gnu"; + break; + case llvm::Triple::aarch64: + if (IsAndroid) + return "aarch64-linux-android"; + if (D.getVFS().exists(SysRoot + "/lib/aarch64-linux-gnu")) + return "aarch64-linux-gnu"; + break; + case llvm::Triple::aarch64_be: + if (D.getVFS().exists(SysRoot + "/lib/aarch64_be-linux-gnu")) + return "aarch64_be-linux-gnu"; + break; + case llvm::Triple::mips: { + std::string MT = IsMipsR6 ? "mipsisa32r6-linux-gnu" : "mips-linux-gnu"; + if (D.getVFS().exists(SysRoot + "/lib/" + MT)) + return MT; + break; + } + case llvm::Triple::mipsel: { + if (IsAndroid) + return "mipsel-linux-android"; + std::string MT = IsMipsR6 ? "mipsisa32r6el-linux-gnu" : "mipsel-linux-gnu"; + if (D.getVFS().exists(SysRoot + "/lib/" + MT)) + return MT; + break; + } + case llvm::Triple::mips64: { + std::string MT = std::string(IsMipsR6 ? "mipsisa64r6" : "mips64") + + "-linux-" + (IsMipsN32Abi ? "gnuabin32" : "gnuabi64"); + if (D.getVFS().exists(SysRoot + "/lib/" + MT)) + return MT; + if (D.getVFS().exists(SysRoot + "/lib/mips64-linux-gnu")) + return "mips64-linux-gnu"; + break; + } + case llvm::Triple::mips64el: { + if (IsAndroid) + return "mips64el-linux-android"; + std::string MT = std::string(IsMipsR6 ? "mipsisa64r6el" : "mips64el") + + "-linux-" + (IsMipsN32Abi ? "gnuabin32" : "gnuabi64"); + if (D.getVFS().exists(SysRoot + "/lib/" + MT)) + return MT; + if (D.getVFS().exists(SysRoot + "/lib/mips64el-linux-gnu")) + return "mips64el-linux-gnu"; + break; + } + case llvm::Triple::ppc: + if (D.getVFS().exists(SysRoot + "/lib/powerpc-linux-gnuspe")) + return "powerpc-linux-gnuspe"; + if (D.getVFS().exists(SysRoot + "/lib/powerpc-linux-gnu")) + return "powerpc-linux-gnu"; + break; + case llvm::Triple::ppc64: + if (D.getVFS().exists(SysRoot + "/lib/powerpc64-linux-gnu")) + return "powerpc64-linux-gnu"; + break; + case llvm::Triple::ppc64le: + if (D.getVFS().exists(SysRoot + "/lib/powerpc64le-linux-gnu")) + return "powerpc64le-linux-gnu"; + break; + case llvm::Triple::sparc: + if (D.getVFS().exists(SysRoot + "/lib/sparc-linux-gnu")) + return "sparc-linux-gnu"; + break; + case llvm::Triple::sparcv9: + if (D.getVFS().exists(SysRoot + "/lib/sparc64-linux-gnu")) + return "sparc64-linux-gnu"; + break; + case llvm::Triple::systemz: + if (D.getVFS().exists(SysRoot + "/lib/s390x-linux-gnu")) + return "s390x-linux-gnu"; + break; + } + return TargetTriple.str(); +} + +static StringRef getOSLibDir(const llvm::Triple &Triple, const ArgList &Args) { + if (Triple.isMIPS()) { + if (Triple.isAndroid()) { + StringRef CPUName; + StringRef ABIName; + tools::mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName); + if (CPUName == "mips32r6") + return "libr6"; + if (CPUName == "mips32r2") + return "libr2"; + } + // lib32 directory has a special meaning on MIPS targets. + // It contains N32 ABI binaries. Use this folder if produce + // code for N32 ABI only. + if (tools::mips::hasMipsAbiArg(Args, "n32")) + return "lib32"; + return Triple.isArch32Bit() ? "lib" : "lib64"; + } + + // It happens that only x86 and PPC use the 'lib32' variant of oslibdir, and + // using that variant while targeting other architectures causes problems + // because the libraries are laid out in shared system roots that can't cope + // with a 'lib32' library search path being considered. So we only enable + // them when we know we may need it. + // + // FIXME: This is a bit of a hack. We should really unify this code for + // reasoning about oslibdir spellings with the lib dir spellings in the + // GCCInstallationDetector, but that is a more significant refactoring. + if (Triple.getArch() == llvm::Triple::x86 || + Triple.getArch() == llvm::Triple::ppc) + return "lib32"; + + if (Triple.getArch() == llvm::Triple::x86_64 && + Triple.getEnvironment() == llvm::Triple::GNUX32) + return "libx32"; + + if (Triple.getArch() == llvm::Triple::riscv32) + return "lib32"; + + return Triple.isArch32Bit() ? "lib" : "lib64"; +} + +static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs, + const Multilib &Multilib, + StringRef InstallPath, + ToolChain::path_list &Paths) { + if (const auto &PathsCallback = Multilibs.filePathsCallback()) + for (const auto &Path : PathsCallback(Multilib)) + addPathIfExists(D, InstallPath + Path, Paths); +} + +Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) + : Generic_ELF(D, Triple, Args) { + GCCInstallation.init(Triple, Args); + Multilibs = GCCInstallation.getMultilibs(); + SelectedMultilib = GCCInstallation.getMultilib(); + llvm::Triple::ArchType Arch = Triple.getArch(); + std::string SysRoot = computeSysRoot(); + + // Cross-compiling binutils and GCC installations (vanilla and openSUSE at + // least) put various tools in a triple-prefixed directory off of the parent + // of the GCC installation. We use the GCC triple here to ensure that we end + // up with tools that support the same amount of cross compiling as the + // detected GCC installation. For example, if we find a GCC installation + // targeting x86_64, but it is a bi-arch GCC installation, it can also be + // used to target i386. + // FIXME: This seems unlikely to be Linux-specific. + ToolChain::path_list &PPaths = getProgramPaths(); + if (GCCInstallation.isValid()) { + PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" + + GCCInstallation.getTriple().str() + "/bin") + .str()); + } + + Distro Distro(D.getVFS()); + + if (Distro.IsAlpineLinux() || Triple.isAndroid()) { + ExtraOpts.push_back("-z"); + ExtraOpts.push_back("now"); + } + + if (Distro.IsOpenSUSE() || Distro.IsUbuntu() || Distro.IsAlpineLinux() || + Triple.isAndroid()) { + ExtraOpts.push_back("-z"); + ExtraOpts.push_back("relro"); + } + + // The lld default page size is too large for Aarch64, which produces much + // larger .so files and images for arm64 device targets. Use 4KB page size + // for Android arm64 targets instead. + if (Triple.isAArch64() && Triple.isAndroid()) { + ExtraOpts.push_back("-z"); + ExtraOpts.push_back("max-page-size=4096"); + } + + if (GCCInstallation.getParentLibPath().find("opt/rh/devtoolset") != + StringRef::npos) + // With devtoolset on RHEL, we want to add a bin directory that is relative + // to the detected gcc install, because if we are using devtoolset gcc then + // we want to use other tools from devtoolset (e.g. ld) instead of the + // standard system tools. + PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + + "/../bin").str()); + + if (Arch == llvm::Triple::arm || Arch == llvm::Triple::thumb) + ExtraOpts.push_back("-X"); + + const bool IsAndroid = Triple.isAndroid(); + const bool IsMips = Triple.isMIPS(); + const bool IsHexagon = Arch == llvm::Triple::hexagon; + const bool IsRISCV = Triple.isRISCV(); + + if (IsMips && !SysRoot.empty()) + ExtraOpts.push_back("--sysroot=" + SysRoot); + + // Do not use 'gnu' hash style for Mips targets because .gnu.hash + // and the MIPS ABI require .dynsym to be sorted in different ways. + // .gnu.hash needs symbols to be grouped by hash code whereas the MIPS + // ABI requires a mapping between the GOT and the symbol table. + // Android loader does not support .gnu.hash until API 23. + // Hexagon linker/loader does not support .gnu.hash + if (!IsMips && !IsHexagon) { + if (Distro.IsRedhat() || Distro.IsOpenSUSE() || Distro.IsAlpineLinux() || + (Distro.IsUbuntu() && Distro >= Distro::UbuntuMaverick) || + (IsAndroid && !Triple.isAndroidVersionLT(23))) + ExtraOpts.push_back("--hash-style=gnu"); + + if (Distro.IsDebian() || Distro.IsOpenSUSE() || + Distro == Distro::UbuntuLucid || Distro == Distro::UbuntuJaunty || + Distro == Distro::UbuntuKarmic || + (IsAndroid && Triple.isAndroidVersionLT(23))) + ExtraOpts.push_back("--hash-style=both"); + } + +#ifdef ENABLE_LINKER_BUILD_ID + ExtraOpts.push_back("--build-id"); +#endif + + if (IsAndroid || Distro.IsOpenSUSE()) + ExtraOpts.push_back("--enable-new-dtags"); + + // The selection of paths to try here is designed to match the patterns which + // the GCC driver itself uses, as this is part of the GCC-compatible driver. + // This was determined by running GCC in a fake filesystem, creating all + // possible permutations of these directories, and seeing which ones it added + // to the link paths. + path_list &Paths = getFilePaths(); + + const std::string OSLibDir = getOSLibDir(Triple, Args); + const std::string MultiarchTriple = getMultiarchTriple(D, Triple, SysRoot); + + // Add the multilib suffixed paths where they are available. + if (GCCInstallation.isValid()) { + const llvm::Triple &GCCTriple = GCCInstallation.getTriple(); + const std::string &LibPath = GCCInstallation.getParentLibPath(); + + // Add toolchain / multilib specific file paths. + addMultilibsFilePaths(D, Multilibs, SelectedMultilib, + GCCInstallation.getInstallPath(), Paths); + + // Sourcery CodeBench MIPS toolchain holds some libraries under + // a biarch-like suffix of the GCC installation. + addPathIfExists( + D, GCCInstallation.getInstallPath() + SelectedMultilib.gccSuffix(), + Paths); + + // GCC cross compiling toolchains will install target libraries which ship + // as part of the toolchain under <prefix>/<triple>/<libdir> rather than as + // any part of the GCC installation in + // <prefix>/<libdir>/gcc/<triple>/<version>. This decision is somewhat + // debatable, but is the reality today. We need to search this tree even + // when we have a sysroot somewhere else. It is the responsibility of + // whomever is doing the cross build targeting a sysroot using a GCC + // installation that is *not* within the system root to ensure two things: + // + // 1) Any DSOs that are linked in from this tree or from the install path + // above must be present on the system root and found via an + // appropriate rpath. + // 2) There must not be libraries installed into + // <prefix>/<triple>/<libdir> unless they should be preferred over + // those within the system root. + // + // Note that this matches the GCC behavior. See the below comment for where + // Clang diverges from GCC's behavior. + addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib/../" + + OSLibDir + SelectedMultilib.osSuffix(), + Paths); + + // If the GCC installation we found is inside of the sysroot, we want to + // prefer libraries installed in the parent prefix of the GCC installation. + // It is important to *not* use these paths when the GCC installation is + // outside of the system root as that can pick up unintended libraries. + // This usually happens when there is an external cross compiler on the + // host system, and a more minimal sysroot available that is the target of + // the cross. Note that GCC does include some of these directories in some + // configurations but this seems somewhere between questionable and simply + // a bug. + if (StringRef(LibPath).startswith(SysRoot)) { + addPathIfExists(D, LibPath + "/" + MultiarchTriple, Paths); + addPathIfExists(D, LibPath + "/../" + OSLibDir, Paths); + } + } + + // Similar to the logic for GCC above, if we currently running Clang inside + // of the requested system root, add its parent library paths to + // those searched. + // FIXME: It's not clear whether we should use the driver's installed + // directory ('Dir' below) or the ResourceDir. + if (StringRef(D.Dir).startswith(SysRoot)) { + addPathIfExists(D, D.Dir + "/../lib/" + MultiarchTriple, Paths); + addPathIfExists(D, D.Dir + "/../" + OSLibDir, Paths); + } + + addPathIfExists(D, SysRoot + "/lib/" + MultiarchTriple, Paths); + addPathIfExists(D, SysRoot + "/lib/../" + OSLibDir, Paths); + + if (IsAndroid) { + // Android sysroots contain a library directory for each supported OS + // version as well as some unversioned libraries in the usual multiarch + // directory. + unsigned Major; + unsigned Minor; + unsigned Micro; + Triple.getEnvironmentVersion(Major, Minor, Micro); + addPathIfExists(D, + SysRoot + "/usr/lib/" + MultiarchTriple + "/" + + llvm::to_string(Major), + Paths); + } + + addPathIfExists(D, SysRoot + "/usr/lib/" + MultiarchTriple, Paths); + // 64-bit OpenEmbedded sysroots may not have a /usr/lib dir. So they cannot + // find /usr/lib64 as it is referenced as /usr/lib/../lib64. So we handle + // this here. + if (Triple.getVendor() == llvm::Triple::OpenEmbedded && + Triple.isArch64Bit()) + addPathIfExists(D, SysRoot + "/usr/" + OSLibDir, Paths); + else + addPathIfExists(D, SysRoot + "/usr/lib/../" + OSLibDir, Paths); + if (IsRISCV) { + StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple); + addPathIfExists(D, SysRoot + "/" + OSLibDir + "/" + ABIName, Paths); + addPathIfExists(D, SysRoot + "/usr/" + OSLibDir + "/" + ABIName, Paths); + } + + // Try walking via the GCC triple path in case of biarch or multiarch GCC + // installations with strange symlinks. + if (GCCInstallation.isValid()) { + addPathIfExists(D, + SysRoot + "/usr/lib/" + GCCInstallation.getTriple().str() + + "/../../" + OSLibDir, + Paths); + + // Add the 'other' biarch variant path + Multilib BiarchSibling; + if (GCCInstallation.getBiarchSibling(BiarchSibling)) { + addPathIfExists(D, GCCInstallation.getInstallPath() + + BiarchSibling.gccSuffix(), + Paths); + } + + // See comments above on the multilib variant for details of why this is + // included even from outside the sysroot. + const std::string &LibPath = GCCInstallation.getParentLibPath(); + const llvm::Triple &GCCTriple = GCCInstallation.getTriple(); + const Multilib &Multilib = GCCInstallation.getMultilib(); + addPathIfExists(D, LibPath + "/../" + GCCTriple.str() + "/lib" + + Multilib.osSuffix(), + Paths); + + // See comments above on the multilib variant for details of why this is + // only included from within the sysroot. + if (StringRef(LibPath).startswith(SysRoot)) + addPathIfExists(D, LibPath, Paths); + } + + // Similar to the logic for GCC above, if we are currently running Clang + // inside of the requested system root, add its parent library path to those + // searched. + // FIXME: It's not clear whether we should use the driver's installed + // directory ('Dir' below) or the ResourceDir. + if (StringRef(D.Dir).startswith(SysRoot)) + addPathIfExists(D, D.Dir + "/../lib", Paths); + + addPathIfExists(D, SysRoot + "/lib", Paths); + addPathIfExists(D, SysRoot + "/usr/lib", Paths); +} + +ToolChain::CXXStdlibType Linux::GetDefaultCXXStdlibType() const { + if (getTriple().isAndroid()) + return ToolChain::CST_Libcxx; + return ToolChain::CST_Libstdcxx; +} + +bool Linux::HasNativeLLVMSupport() const { return true; } + +Tool *Linux::buildLinker() const { return new tools::gnutools::Linker(*this); } + +Tool *Linux::buildAssembler() const { + return new tools::gnutools::Assembler(*this); +} + +std::string Linux::computeSysRoot() const { + if (!getDriver().SysRoot.empty()) + return getDriver().SysRoot; + + if (getTriple().isAndroid()) { + // Android toolchains typically include a sysroot at ../sysroot relative to + // the clang binary. + const StringRef ClangDir = getDriver().getInstalledDir(); + std::string AndroidSysRootPath = (ClangDir + "/../sysroot").str(); + if (getVFS().exists(AndroidSysRootPath)) + return AndroidSysRootPath; + } + + if (!GCCInstallation.isValid() || !getTriple().isMIPS()) + return std::string(); + + // Standalone MIPS toolchains use different names for sysroot folder + // and put it into different places. Here we try to check some known + // variants. + + const StringRef InstallDir = GCCInstallation.getInstallPath(); + const StringRef TripleStr = GCCInstallation.getTriple().str(); + const Multilib &Multilib = GCCInstallation.getMultilib(); + + std::string Path = + (InstallDir + "/../../../../" + TripleStr + "/libc" + Multilib.osSuffix()) + .str(); + + if (getVFS().exists(Path)) + return Path; + + Path = (InstallDir + "/../../../../sysroot" + Multilib.osSuffix()).str(); + + if (getVFS().exists(Path)) + return Path; + + return std::string(); +} + +std::string Linux::getDynamicLinker(const ArgList &Args) const { + const llvm::Triple::ArchType Arch = getArch(); + const llvm::Triple &Triple = getTriple(); + + const Distro Distro(getDriver().getVFS()); + + if (Triple.isAndroid()) + return Triple.isArch64Bit() ? "/system/bin/linker64" : "/system/bin/linker"; + + if (Triple.isMusl()) { + std::string ArchName; + bool IsArm = false; + + switch (Arch) { + case llvm::Triple::arm: + case llvm::Triple::thumb: + ArchName = "arm"; + IsArm = true; + break; + case llvm::Triple::armeb: + case llvm::Triple::thumbeb: + ArchName = "armeb"; + IsArm = true; + break; + default: + ArchName = Triple.getArchName().str(); + } + if (IsArm && + (Triple.getEnvironment() == llvm::Triple::MuslEABIHF || + tools::arm::getARMFloatABI(*this, Args) == tools::arm::FloatABI::Hard)) + ArchName += "hf"; + + return "/lib/ld-musl-" + ArchName + ".so.1"; + } + + std::string LibDir; + std::string Loader; + + switch (Arch) { + default: + llvm_unreachable("unsupported architecture"); + + case llvm::Triple::aarch64: + LibDir = "lib"; + Loader = "ld-linux-aarch64.so.1"; + break; + case llvm::Triple::aarch64_be: + LibDir = "lib"; + Loader = "ld-linux-aarch64_be.so.1"; + break; + case llvm::Triple::arm: + case llvm::Triple::thumb: + case llvm::Triple::armeb: + case llvm::Triple::thumbeb: { + const bool HF = + Triple.getEnvironment() == llvm::Triple::GNUEABIHF || + tools::arm::getARMFloatABI(*this, Args) == tools::arm::FloatABI::Hard; + + LibDir = "lib"; + Loader = HF ? "ld-linux-armhf.so.3" : "ld-linux.so.3"; + break; + } + case llvm::Triple::mips: + case llvm::Triple::mipsel: + case llvm::Triple::mips64: + case llvm::Triple::mips64el: { + bool IsNaN2008 = tools::mips::isNaN2008(Args, Triple); + + LibDir = "lib" + tools::mips::getMipsABILibSuffix(Args, Triple); + + if (tools::mips::isUCLibc(Args)) + Loader = IsNaN2008 ? "ld-uClibc-mipsn8.so.0" : "ld-uClibc.so.0"; + else if (!Triple.hasEnvironment() && + Triple.getVendor() == llvm::Triple::VendorType::MipsTechnologies) + Loader = + Triple.isLittleEndian() ? "ld-musl-mipsel.so.1" : "ld-musl-mips.so.1"; + else + Loader = IsNaN2008 ? "ld-linux-mipsn8.so.1" : "ld.so.1"; + + break; + } + case llvm::Triple::ppc: + LibDir = "lib"; + Loader = "ld.so.1"; + break; + case llvm::Triple::ppc64: + LibDir = "lib64"; + Loader = + (tools::ppc::hasPPCAbiArg(Args, "elfv2")) ? "ld64.so.2" : "ld64.so.1"; + break; + case llvm::Triple::ppc64le: + LibDir = "lib64"; + Loader = + (tools::ppc::hasPPCAbiArg(Args, "elfv1")) ? "ld64.so.1" : "ld64.so.2"; + break; + case llvm::Triple::riscv32: { + StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple); + LibDir = "lib"; + Loader = ("ld-linux-riscv32-" + ABIName + ".so.1").str(); + break; + } + case llvm::Triple::riscv64: { + StringRef ABIName = tools::riscv::getRISCVABI(Args, Triple); + LibDir = "lib"; + Loader = ("ld-linux-riscv64-" + ABIName + ".so.1").str(); + break; + } + case llvm::Triple::sparc: + case llvm::Triple::sparcel: + LibDir = "lib"; + Loader = "ld-linux.so.2"; + break; + case llvm::Triple::sparcv9: + LibDir = "lib64"; + Loader = "ld-linux.so.2"; + break; + case llvm::Triple::systemz: + LibDir = "lib"; + Loader = "ld64.so.1"; + break; + case llvm::Triple::x86: + LibDir = "lib"; + Loader = "ld-linux.so.2"; + break; + case llvm::Triple::x86_64: { + bool X32 = Triple.getEnvironment() == llvm::Triple::GNUX32; + + LibDir = X32 ? "libx32" : "lib64"; + Loader = X32 ? "ld-linux-x32.so.2" : "ld-linux-x86-64.so.2"; + break; + } + } + + if (Distro == Distro::Exherbo && + (Triple.getVendor() == llvm::Triple::UnknownVendor || + Triple.getVendor() == llvm::Triple::PC)) + return "/usr/" + Triple.str() + "/lib/" + Loader; + return "/" + LibDir + "/" + Loader; +} + +void Linux::AddClangSystemIncludeArgs(const ArgList &DriverArgs, + ArgStringList &CC1Args) const { + const Driver &D = getDriver(); + std::string SysRoot = computeSysRoot(); + + if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc)) + return; + + if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) + addSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/local/include"); + + SmallString<128> ResourceDirInclude(D.ResourceDir); + llvm::sys::path::append(ResourceDirInclude, "include"); + if (!DriverArgs.hasArg(options::OPT_nobuiltininc) && + (!getTriple().isMusl() || DriverArgs.hasArg(options::OPT_nostdlibinc))) + addSystemInclude(DriverArgs, CC1Args, ResourceDirInclude); + + if (DriverArgs.hasArg(options::OPT_nostdlibinc)) + return; + + // Check for configure-time C include directories. + StringRef CIncludeDirs(C_INCLUDE_DIRS); + if (CIncludeDirs != "") { + SmallVector<StringRef, 5> dirs; + CIncludeDirs.split(dirs, ":"); + for (StringRef dir : dirs) { + StringRef Prefix = + llvm::sys::path::is_absolute(dir) ? StringRef(SysRoot) : ""; + addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir); + } + return; + } + + // Lacking those, try to detect the correct set of system includes for the + // target triple. + + // Add include directories specific to the selected multilib set and multilib. + if (GCCInstallation.isValid()) { + const auto &Callback = Multilibs.includeDirsCallback(); + if (Callback) { + for (const auto &Path : Callback(GCCInstallation.getMultilib())) + addExternCSystemIncludeIfExists( + DriverArgs, CC1Args, GCCInstallation.getInstallPath() + Path); + } + } + + // Implement generic Debian multiarch support. + const StringRef X86_64MultiarchIncludeDirs[] = { + "/usr/include/x86_64-linux-gnu", + + // FIXME: These are older forms of multiarch. It's not clear that they're + // in use in any released version of Debian, so we should consider + // removing them. + "/usr/include/i686-linux-gnu/64", "/usr/include/i486-linux-gnu/64"}; + const StringRef X86MultiarchIncludeDirs[] = { + "/usr/include/i386-linux-gnu", + + // FIXME: These are older forms of multiarch. It's not clear that they're + // in use in any released version of Debian, so we should consider + // removing them. + "/usr/include/x86_64-linux-gnu/32", "/usr/include/i686-linux-gnu", + "/usr/include/i486-linux-gnu"}; + const StringRef AArch64MultiarchIncludeDirs[] = { + "/usr/include/aarch64-linux-gnu"}; + const StringRef ARMMultiarchIncludeDirs[] = { + "/usr/include/arm-linux-gnueabi"}; + const StringRef ARMHFMultiarchIncludeDirs[] = { + "/usr/include/arm-linux-gnueabihf"}; + const StringRef ARMEBMultiarchIncludeDirs[] = { + "/usr/include/armeb-linux-gnueabi"}; + const StringRef ARMEBHFMultiarchIncludeDirs[] = { + "/usr/include/armeb-linux-gnueabihf"}; + const StringRef MIPSMultiarchIncludeDirs[] = {"/usr/include/mips-linux-gnu"}; + const StringRef MIPSELMultiarchIncludeDirs[] = { + "/usr/include/mipsel-linux-gnu"}; + const StringRef MIPS64MultiarchIncludeDirs[] = { + "/usr/include/mips64-linux-gnuabi64"}; + const StringRef MIPS64ELMultiarchIncludeDirs[] = { + "/usr/include/mips64el-linux-gnuabi64"}; + const StringRef MIPSN32MultiarchIncludeDirs[] = { + "/usr/include/mips64-linux-gnuabin32"}; + const StringRef MIPSN32ELMultiarchIncludeDirs[] = { + "/usr/include/mips64el-linux-gnuabin32"}; + const StringRef MIPSR6MultiarchIncludeDirs[] = { + "/usr/include/mipsisa32-linux-gnu"}; + const StringRef MIPSR6ELMultiarchIncludeDirs[] = { + "/usr/include/mipsisa32r6el-linux-gnu"}; + const StringRef MIPS64R6MultiarchIncludeDirs[] = { + "/usr/include/mipsisa64r6-linux-gnuabi64"}; + const StringRef MIPS64R6ELMultiarchIncludeDirs[] = { + "/usr/include/mipsisa64r6el-linux-gnuabi64"}; + const StringRef MIPSN32R6MultiarchIncludeDirs[] = { + "/usr/include/mipsisa64r6-linux-gnuabin32"}; + const StringRef MIPSN32R6ELMultiarchIncludeDirs[] = { + "/usr/include/mipsisa64r6el-linux-gnuabin32"}; + const StringRef PPCMultiarchIncludeDirs[] = { + "/usr/include/powerpc-linux-gnu", + "/usr/include/powerpc-linux-gnuspe"}; + const StringRef PPC64MultiarchIncludeDirs[] = { + "/usr/include/powerpc64-linux-gnu"}; + const StringRef PPC64LEMultiarchIncludeDirs[] = { + "/usr/include/powerpc64le-linux-gnu"}; + const StringRef SparcMultiarchIncludeDirs[] = { + "/usr/include/sparc-linux-gnu"}; + const StringRef Sparc64MultiarchIncludeDirs[] = { + "/usr/include/sparc64-linux-gnu"}; + const StringRef SYSTEMZMultiarchIncludeDirs[] = { + "/usr/include/s390x-linux-gnu"}; + ArrayRef<StringRef> MultiarchIncludeDirs; + switch (getTriple().getArch()) { + case llvm::Triple::x86_64: + MultiarchIncludeDirs = X86_64MultiarchIncludeDirs; + break; + case llvm::Triple::x86: + MultiarchIncludeDirs = X86MultiarchIncludeDirs; + break; + case llvm::Triple::aarch64: + case llvm::Triple::aarch64_be: + MultiarchIncludeDirs = AArch64MultiarchIncludeDirs; + break; + case llvm::Triple::arm: + case llvm::Triple::thumb: + if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF) + MultiarchIncludeDirs = ARMHFMultiarchIncludeDirs; + else + MultiarchIncludeDirs = ARMMultiarchIncludeDirs; + break; + case llvm::Triple::armeb: + case llvm::Triple::thumbeb: + if (getTriple().getEnvironment() == llvm::Triple::GNUEABIHF) + MultiarchIncludeDirs = ARMEBHFMultiarchIncludeDirs; + else + MultiarchIncludeDirs = ARMEBMultiarchIncludeDirs; + break; + case llvm::Triple::mips: + if (getTriple().getSubArch() == llvm::Triple::MipsSubArch_r6) + MultiarchIncludeDirs = MIPSR6MultiarchIncludeDirs; + else + MultiarchIncludeDirs = MIPSMultiarchIncludeDirs; + break; + case llvm::Triple::mipsel: + if (getTriple().getSubArch() == llvm::Triple::MipsSubArch_r6) + MultiarchIncludeDirs = MIPSR6ELMultiarchIncludeDirs; + else + MultiarchIncludeDirs = MIPSELMultiarchIncludeDirs; + break; + case llvm::Triple::mips64: + if (getTriple().getSubArch() == llvm::Triple::MipsSubArch_r6) + if (getTriple().getEnvironment() == llvm::Triple::GNUABIN32) + MultiarchIncludeDirs = MIPSN32R6MultiarchIncludeDirs; + else + MultiarchIncludeDirs = MIPS64R6MultiarchIncludeDirs; + else if (getTriple().getEnvironment() == llvm::Triple::GNUABIN32) + MultiarchIncludeDirs = MIPSN32MultiarchIncludeDirs; + else + MultiarchIncludeDirs = MIPS64MultiarchIncludeDirs; + break; + case llvm::Triple::mips64el: + if (getTriple().getSubArch() == llvm::Triple::MipsSubArch_r6) + if (getTriple().getEnvironment() == llvm::Triple::GNUABIN32) + MultiarchIncludeDirs = MIPSN32R6ELMultiarchIncludeDirs; + else + MultiarchIncludeDirs = MIPS64R6ELMultiarchIncludeDirs; + else if (getTriple().getEnvironment() == llvm::Triple::GNUABIN32) + MultiarchIncludeDirs = MIPSN32ELMultiarchIncludeDirs; + else + MultiarchIncludeDirs = MIPS64ELMultiarchIncludeDirs; + break; + case llvm::Triple::ppc: + MultiarchIncludeDirs = PPCMultiarchIncludeDirs; + break; + case llvm::Triple::ppc64: + MultiarchIncludeDirs = PPC64MultiarchIncludeDirs; + break; + case llvm::Triple::ppc64le: + MultiarchIncludeDirs = PPC64LEMultiarchIncludeDirs; + break; + case llvm::Triple::sparc: + MultiarchIncludeDirs = SparcMultiarchIncludeDirs; + break; + case llvm::Triple::sparcv9: + MultiarchIncludeDirs = Sparc64MultiarchIncludeDirs; + break; + case llvm::Triple::systemz: + MultiarchIncludeDirs = SYSTEMZMultiarchIncludeDirs; + break; + default: + break; + } + + const std::string AndroidMultiarchIncludeDir = + std::string("/usr/include/") + + getMultiarchTriple(D, getTriple(), SysRoot); + const StringRef AndroidMultiarchIncludeDirs[] = {AndroidMultiarchIncludeDir}; + if (getTriple().isAndroid()) + MultiarchIncludeDirs = AndroidMultiarchIncludeDirs; + + for (StringRef Dir : MultiarchIncludeDirs) { + if (D.getVFS().exists(SysRoot + Dir)) { + addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + Dir); + break; + } + } + + if (getTriple().getOS() == llvm::Triple::RTEMS) + return; + + // Add an include of '/include' directly. This isn't provided by default by + // system GCCs, but is often used with cross-compiling GCCs, and harmless to + // add even when Clang is acting as-if it were a system compiler. + addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/include"); + + addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/include"); + + if (!DriverArgs.hasArg(options::OPT_nobuiltininc) && getTriple().isMusl()) + addSystemInclude(DriverArgs, CC1Args, ResourceDirInclude); +} + +static std::string DetectLibcxxIncludePath(llvm::vfs::FileSystem &vfs, + StringRef base) { + std::error_code EC; + int MaxVersion = 0; + std::string MaxVersionString = ""; + for (llvm::vfs::directory_iterator LI = vfs.dir_begin(base, EC), LE; + !EC && LI != LE; LI = LI.increment(EC)) { + StringRef VersionText = llvm::sys::path::filename(LI->path()); + int Version; + if (VersionText[0] == 'v' && + !VersionText.slice(1, StringRef::npos).getAsInteger(10, Version)) { + if (Version > MaxVersion) { + MaxVersion = Version; + MaxVersionString = VersionText; + } + } + } + return MaxVersion ? (base + "/" + MaxVersionString).str() : ""; +} + +void Linux::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs, + llvm::opt::ArgStringList &CC1Args) const { + const std::string& SysRoot = computeSysRoot(); + const std::string LibCXXIncludePathCandidates[] = { + DetectLibcxxIncludePath(getVFS(), getDriver().Dir + "/../include/c++"), + // If this is a development, non-installed, clang, libcxx will + // not be found at ../include/c++ but it likely to be found at + // one of the following two locations: + DetectLibcxxIncludePath(getVFS(), SysRoot + "/usr/local/include/c++"), + DetectLibcxxIncludePath(getVFS(), SysRoot + "/usr/include/c++") }; + for (const auto &IncludePath : LibCXXIncludePathCandidates) { + if (IncludePath.empty() || !getVFS().exists(IncludePath)) + continue; + // Use the first candidate that exists. + addSystemInclude(DriverArgs, CC1Args, IncludePath); + return; + } +} + +void Linux::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs, + llvm::opt::ArgStringList &CC1Args) const { + // We need a detected GCC installation on Linux to provide libstdc++'s + // headers. + if (!GCCInstallation.isValid()) + return; + + // By default, look for the C++ headers in an include directory adjacent to + // the lib directory of the GCC installation. Note that this is expect to be + // equivalent to '/usr/include/c++/X.Y' in almost all cases. + StringRef LibDir = GCCInstallation.getParentLibPath(); + StringRef InstallDir = GCCInstallation.getInstallPath(); + StringRef TripleStr = GCCInstallation.getTriple().str(); + const Multilib &Multilib = GCCInstallation.getMultilib(); + const std::string GCCMultiarchTriple = getMultiarchTriple( + getDriver(), GCCInstallation.getTriple(), getDriver().SysRoot); + const std::string TargetMultiarchTriple = + getMultiarchTriple(getDriver(), getTriple(), getDriver().SysRoot); + const GCCVersion &Version = GCCInstallation.getVersion(); + + // The primary search for libstdc++ supports multiarch variants. + if (addLibStdCXXIncludePaths(LibDir.str() + "/../include", + "/c++/" + Version.Text, TripleStr, + GCCMultiarchTriple, TargetMultiarchTriple, + Multilib.includeSuffix(), DriverArgs, CC1Args)) + return; + + // Otherwise, fall back on a bunch of options which don't use multiarch + // layouts for simplicity. + const std::string LibStdCXXIncludePathCandidates[] = { + // Gentoo is weird and places its headers inside the GCC install, + // so if the first attempt to find the headers fails, try these patterns. + InstallDir.str() + "/include/g++-v" + Version.Text, + InstallDir.str() + "/include/g++-v" + Version.MajorStr + "." + + Version.MinorStr, + InstallDir.str() + "/include/g++-v" + Version.MajorStr, + // Android standalone toolchain has C++ headers in yet another place. + LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.Text, + // Freescale SDK C++ headers are directly in <sysroot>/usr/include/c++, + // without a subdirectory corresponding to the gcc version. + LibDir.str() + "/../include/c++", + // Cray's gcc installation puts headers under "g++" without a + // version suffix. + LibDir.str() + "/../include/g++", + }; + + for (const auto &IncludePath : LibStdCXXIncludePathCandidates) { + if (addLibStdCXXIncludePaths(IncludePath, /*Suffix*/ "", TripleStr, + /*GCCMultiarchTriple*/ "", + /*TargetMultiarchTriple*/ "", + Multilib.includeSuffix(), DriverArgs, CC1Args)) + break; + } +} + +void Linux::AddCudaIncludeArgs(const ArgList &DriverArgs, + ArgStringList &CC1Args) const { + CudaInstallation.AddCudaIncludeArgs(DriverArgs, CC1Args); +} + +void Linux::AddIAMCUIncludeArgs(const ArgList &DriverArgs, + ArgStringList &CC1Args) const { + if (GCCInstallation.isValid()) { + CC1Args.push_back("-isystem"); + CC1Args.push_back(DriverArgs.MakeArgString( + GCCInstallation.getParentLibPath() + "/../" + + GCCInstallation.getTriple().str() + "/include")); + } +} + +bool Linux::isPIEDefault() const { + return (getTriple().isAndroid() && !getTriple().isAndroidVersionLT(16)) || + getTriple().isMusl() || getSanitizerArgs().requiresPIE(); +} + +bool Linux::isNoExecStackDefault() const { + return getTriple().isAndroid(); +} + +bool Linux::IsMathErrnoDefault() const { + if (getTriple().isAndroid()) + return false; + return Generic_ELF::IsMathErrnoDefault(); +} + +SanitizerMask Linux::getSupportedSanitizers() const { + const bool IsX86 = getTriple().getArch() == llvm::Triple::x86; + const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64; + const bool IsMIPS = getTriple().isMIPS32(); + const bool IsMIPS64 = getTriple().isMIPS64(); + const bool IsPowerPC64 = getTriple().getArch() == llvm::Triple::ppc64 || + getTriple().getArch() == llvm::Triple::ppc64le; + const bool IsAArch64 = getTriple().getArch() == llvm::Triple::aarch64 || + getTriple().getArch() == llvm::Triple::aarch64_be; + const bool IsArmArch = getTriple().getArch() == llvm::Triple::arm || + getTriple().getArch() == llvm::Triple::thumb || + getTriple().getArch() == llvm::Triple::armeb || + getTriple().getArch() == llvm::Triple::thumbeb; + SanitizerMask Res = ToolChain::getSupportedSanitizers(); + Res |= SanitizerKind::Address; + Res |= SanitizerKind::PointerCompare; + Res |= SanitizerKind::PointerSubtract; + Res |= SanitizerKind::Fuzzer; + Res |= SanitizerKind::FuzzerNoLink; + Res |= SanitizerKind::KernelAddress; + Res |= SanitizerKind::Memory; + Res |= SanitizerKind::Vptr; + Res |= SanitizerKind::SafeStack; + if (IsX86_64 || IsMIPS64 || IsAArch64) + Res |= SanitizerKind::DataFlow; + if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsArmArch || IsPowerPC64) + Res |= SanitizerKind::Leak; + if (IsX86_64 || IsMIPS64 || IsAArch64 || IsPowerPC64) + Res |= SanitizerKind::Thread; + if (IsX86_64) + Res |= SanitizerKind::KernelMemory; + if (IsX86 || IsX86_64) + Res |= SanitizerKind::Function; + if (IsX86_64 || IsMIPS64 || IsAArch64 || IsX86 || IsMIPS || IsArmArch || + IsPowerPC64) + Res |= SanitizerKind::Scudo; + if (IsX86_64 || IsAArch64) { + Res |= SanitizerKind::HWAddress; + Res |= SanitizerKind::KernelHWAddress; + } + return Res; +} + +void Linux::addProfileRTLibs(const llvm::opt::ArgList &Args, + llvm::opt::ArgStringList &CmdArgs) const { + if (!needsProfileRT(Args)) return; + + // Add linker option -u__llvm_runtime_variable to cause runtime + // initialization module to be linked in. + if ((!Args.hasArg(options::OPT_coverage)) && + (!Args.hasArg(options::OPT_ftest_coverage))) + CmdArgs.push_back(Args.MakeArgString( + Twine("-u", llvm::getInstrProfRuntimeHookVarName()))); + ToolChain::addProfileRTLibs(Args, CmdArgs); +} |