/
CommonArgs.cpp
1415 lines (1245 loc) · 49.8 KB
/
CommonArgs.cpp
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//===--- CommonArgs.cpp - Args handling for multiple toolchains -*- 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 "CommonArgs.h"
#include "Arch/AArch64.h"
#include "Arch/ARM.h"
#include "Arch/Mips.h"
#include "Arch/PPC.h"
#include "Arch/SystemZ.h"
#include "Arch/VE.h"
#include "Arch/X86.h"
#include "HIP.h"
#include "Hexagon.h"
#include "InputInfo.h"
#include "clang/Basic/CharInfo.h"
#include "clang/Basic/LangOptions.h"
#include "clang/Basic/ObjCRuntime.h"
#include "clang/Basic/Version.h"
#include "clang/Config/config.h"
#include "clang/Driver/Action.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Job.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/SanitizerArgs.h"
#include "clang/Driver/ToolChain.h"
#include "clang/Driver/Util.h"
#include "clang/Driver/XRayArgs.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Twine.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/Compression.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/ScopedPrinter.h"
#include "llvm/Support/TargetParser.h"
#include "llvm/Support/Threading.h"
#include "llvm/Support/VirtualFileSystem.h"
#include "llvm/Support/YAMLParser.h"
using namespace clang::driver;
using namespace clang::driver::tools;
using namespace clang;
using namespace llvm::opt;
void tools::addPathIfExists(const Driver &D, const Twine &Path,
ToolChain::path_list &Paths) {
if (D.getVFS().exists(Path))
Paths.push_back(Path.str());
}
void tools::handleTargetFeaturesGroup(const ArgList &Args,
std::vector<StringRef> &Features,
OptSpecifier Group) {
for (const Arg *A : Args.filtered(Group)) {
StringRef Name = A->getOption().getName();
A->claim();
// Skip over "-m".
assert(Name.startswith("m") && "Invalid feature name.");
Name = Name.substr(1);
bool IsNegative = Name.startswith("no-");
if (IsNegative)
Name = Name.substr(3);
Features.push_back(Args.MakeArgString((IsNegative ? "-" : "+") + Name));
}
}
std::vector<StringRef>
tools::unifyTargetFeatures(const std::vector<StringRef> &Features) {
std::vector<StringRef> UnifiedFeatures;
// Find the last of each feature.
llvm::StringMap<unsigned> LastOpt;
for (unsigned I = 0, N = Features.size(); I < N; ++I) {
StringRef Name = Features[I];
assert(Name[0] == '-' || Name[0] == '+');
LastOpt[Name.drop_front(1)] = I;
}
for (unsigned I = 0, N = Features.size(); I < N; ++I) {
// If this feature was overridden, ignore it.
StringRef Name = Features[I];
llvm::StringMap<unsigned>::iterator LastI = LastOpt.find(Name.drop_front(1));
assert(LastI != LastOpt.end());
unsigned Last = LastI->second;
if (Last != I)
continue;
UnifiedFeatures.push_back(Name);
}
return UnifiedFeatures;
}
void tools::addDirectoryList(const ArgList &Args, ArgStringList &CmdArgs,
const char *ArgName, const char *EnvVar) {
const char *DirList = ::getenv(EnvVar);
bool CombinedArg = false;
if (!DirList)
return; // Nothing to do.
StringRef Name(ArgName);
if (Name.equals("-I") || Name.equals("-L") || Name.empty())
CombinedArg = true;
StringRef Dirs(DirList);
if (Dirs.empty()) // Empty string should not add '.'.
return;
StringRef::size_type Delim;
while ((Delim = Dirs.find(llvm::sys::EnvPathSeparator)) != StringRef::npos) {
if (Delim == 0) { // Leading colon.
if (CombinedArg) {
CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + "."));
} else {
CmdArgs.push_back(ArgName);
CmdArgs.push_back(".");
}
} else {
if (CombinedArg) {
CmdArgs.push_back(
Args.MakeArgString(std::string(ArgName) + Dirs.substr(0, Delim)));
} else {
CmdArgs.push_back(ArgName);
CmdArgs.push_back(Args.MakeArgString(Dirs.substr(0, Delim)));
}
}
Dirs = Dirs.substr(Delim + 1);
}
if (Dirs.empty()) { // Trailing colon.
if (CombinedArg) {
CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + "."));
} else {
CmdArgs.push_back(ArgName);
CmdArgs.push_back(".");
}
} else { // Add the last path.
if (CombinedArg) {
CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + Dirs));
} else {
CmdArgs.push_back(ArgName);
CmdArgs.push_back(Args.MakeArgString(Dirs));
}
}
}
void tools::AddLinkerInputs(const ToolChain &TC, const InputInfoList &Inputs,
const ArgList &Args, ArgStringList &CmdArgs,
const JobAction &JA) {
const Driver &D = TC.getDriver();
// Add extra linker input arguments which are not treated as inputs
// (constructed via -Xarch_).
Args.AddAllArgValues(CmdArgs, options::OPT_Zlinker_input);
// LIBRARY_PATH are included before user inputs and only supported on native
// toolchains.
if (!TC.isCrossCompiling())
addDirectoryList(Args, CmdArgs, "-L", "LIBRARY_PATH");
for (const auto &II : Inputs) {
// If the current tool chain refers to an OpenMP offloading host, we
// should ignore inputs that refer to OpenMP offloading devices -
// they will be embedded according to a proper linker script.
if (auto *IA = II.getAction())
if ((JA.isHostOffloading(Action::OFK_OpenMP) &&
IA->isDeviceOffloading(Action::OFK_OpenMP)))
continue;
if (!TC.HasNativeLLVMSupport() && types::isLLVMIR(II.getType()))
// Don't try to pass LLVM inputs unless we have native support.
D.Diag(diag::err_drv_no_linker_llvm_support) << TC.getTripleString();
// Add filenames immediately.
if (II.isFilename()) {
CmdArgs.push_back(II.getFilename());
continue;
}
// Otherwise, this is a linker input argument.
const Arg &A = II.getInputArg();
// Handle reserved library options.
if (A.getOption().matches(options::OPT_Z_reserved_lib_stdcxx))
TC.AddCXXStdlibLibArgs(Args, CmdArgs);
else if (A.getOption().matches(options::OPT_Z_reserved_lib_cckext))
TC.AddCCKextLibArgs(Args, CmdArgs);
else if (A.getOption().matches(options::OPT_z)) {
// Pass -z prefix for gcc linker compatibility.
A.claim();
A.render(Args, CmdArgs);
} else {
A.renderAsInput(Args, CmdArgs);
}
}
}
void tools::AddTargetFeature(const ArgList &Args,
std::vector<StringRef> &Features,
OptSpecifier OnOpt, OptSpecifier OffOpt,
StringRef FeatureName) {
if (Arg *A = Args.getLastArg(OnOpt, OffOpt)) {
if (A->getOption().matches(OnOpt))
Features.push_back(Args.MakeArgString("+" + FeatureName));
else
Features.push_back(Args.MakeArgString("-" + FeatureName));
}
}
/// Get the (LLVM) name of the R600 gpu we are targeting.
static std::string getR600TargetGPU(const ArgList &Args) {
if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
const char *GPUName = A->getValue();
return llvm::StringSwitch<const char *>(GPUName)
.Cases("rv630", "rv635", "r600")
.Cases("rv610", "rv620", "rs780", "rs880")
.Case("rv740", "rv770")
.Case("palm", "cedar")
.Cases("sumo", "sumo2", "sumo")
.Case("hemlock", "cypress")
.Case("aruba", "cayman")
.Default(GPUName);
}
return "";
}
static std::string getLanaiTargetCPU(const ArgList &Args) {
if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
return A->getValue();
}
return "";
}
/// Get the (LLVM) name of the WebAssembly cpu we are targeting.
static StringRef getWebAssemblyTargetCPU(const ArgList &Args) {
// If we have -mcpu=, use that.
if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
StringRef CPU = A->getValue();
#ifdef __wasm__
// Handle "native" by examining the host. "native" isn't meaningful when
// cross compiling, so only support this when the host is also WebAssembly.
if (CPU == "native")
return llvm::sys::getHostCPUName();
#endif
return CPU;
}
return "generic";
}
std::string tools::getCPUName(const ArgList &Args, const llvm::Triple &T,
bool FromAs) {
Arg *A;
switch (T.getArch()) {
default:
return "";
case llvm::Triple::aarch64:
case llvm::Triple::aarch64_32:
case llvm::Triple::aarch64_be:
return aarch64::getAArch64TargetCPU(Args, T, A);
case llvm::Triple::arm:
case llvm::Triple::armeb:
case llvm::Triple::thumb:
case llvm::Triple::thumbeb: {
StringRef MArch, MCPU;
arm::getARMArchCPUFromArgs(Args, MArch, MCPU, FromAs);
return arm::getARMTargetCPU(MCPU, MArch, T);
}
case llvm::Triple::avr:
if (const Arg *A = Args.getLastArg(options::OPT_mmcu_EQ))
return A->getValue();
return "";
case llvm::Triple::mips:
case llvm::Triple::mipsel:
case llvm::Triple::mips64:
case llvm::Triple::mips64el: {
StringRef CPUName;
StringRef ABIName;
mips::getMipsCPUAndABI(Args, T, CPUName, ABIName);
return std::string(CPUName);
}
case llvm::Triple::nvptx:
case llvm::Triple::nvptx64:
if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
return A->getValue();
return "";
case llvm::Triple::ppc:
case llvm::Triple::ppc64:
case llvm::Triple::ppc64le: {
std::string TargetCPUName = ppc::getPPCTargetCPU(Args);
// LLVM may default to generating code for the native CPU,
// but, like gcc, we default to a more generic option for
// each architecture. (except on AIX)
if (!TargetCPUName.empty())
return TargetCPUName;
if (T.isOSAIX())
TargetCPUName = "pwr4";
else if (T.getArch() == llvm::Triple::ppc64le)
TargetCPUName = "ppc64le";
else if (T.getArch() == llvm::Triple::ppc64)
TargetCPUName = "ppc64";
else
TargetCPUName = "ppc";
return TargetCPUName;
}
case llvm::Triple::riscv32:
case llvm::Triple::riscv64:
if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
return A->getValue();
return "";
case llvm::Triple::bpfel:
case llvm::Triple::bpfeb:
case llvm::Triple::sparc:
case llvm::Triple::sparcel:
case llvm::Triple::sparcv9:
if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
return A->getValue();
return "";
case llvm::Triple::x86:
case llvm::Triple::x86_64:
return x86::getX86TargetCPU(Args, T);
case llvm::Triple::hexagon:
return "hexagon" +
toolchains::HexagonToolChain::GetTargetCPUVersion(Args).str();
case llvm::Triple::lanai:
return getLanaiTargetCPU(Args);
case llvm::Triple::systemz:
return systemz::getSystemZTargetCPU(Args);
case llvm::Triple::r600:
case llvm::Triple::amdgcn:
return getR600TargetGPU(Args);
case llvm::Triple::wasm32:
case llvm::Triple::wasm64:
return std::string(getWebAssemblyTargetCPU(Args));
}
}
llvm::StringRef tools::getLTOParallelism(const ArgList &Args, const Driver &D) {
Arg *LtoJobsArg = Args.getLastArg(options::OPT_flto_jobs_EQ);
if (!LtoJobsArg)
return {};
if (!llvm::get_threadpool_strategy(LtoJobsArg->getValue()))
D.Diag(diag::err_drv_invalid_int_value)
<< LtoJobsArg->getAsString(Args) << LtoJobsArg->getValue();
return LtoJobsArg->getValue();
}
// CloudABI uses -ffunction-sections and -fdata-sections by default.
bool tools::isUseSeparateSections(const llvm::Triple &Triple) {
return Triple.getOS() == llvm::Triple::CloudABI;
}
void tools::addLTOOptions(const ToolChain &ToolChain, const ArgList &Args,
ArgStringList &CmdArgs, const InputInfo &Output,
const InputInfo &Input, bool IsThinLTO) {
const char *Linker = Args.MakeArgString(ToolChain.GetLinkerPath());
const Driver &D = ToolChain.getDriver();
if (llvm::sys::path::filename(Linker) != "ld.lld" &&
llvm::sys::path::stem(Linker) != "ld.lld") {
// Tell the linker to load the plugin. This has to come before
// AddLinkerInputs as gold requires -plugin to come before any -plugin-opt
// that -Wl might forward.
CmdArgs.push_back("-plugin");
#if defined(_WIN32)
const char *Suffix = ".dll";
#elif defined(__APPLE__)
const char *Suffix = ".dylib";
#else
const char *Suffix = ".so";
#endif
SmallString<1024> Plugin;
llvm::sys::path::native(
Twine(D.Dir) + "/../lib" CLANG_LIBDIR_SUFFIX "/LLVMgold" + Suffix,
Plugin);
CmdArgs.push_back(Args.MakeArgString(Plugin));
}
// Try to pass driver level flags relevant to LTO code generation down to
// the plugin.
// Handle flags for selecting CPU variants.
std::string CPU = getCPUName(Args, ToolChain.getTriple());
if (!CPU.empty())
CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=mcpu=") + CPU));
if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
// The optimization level matches
// CompilerInvocation.cpp:getOptimizationLevel().
StringRef OOpt;
if (A->getOption().matches(options::OPT_O4) ||
A->getOption().matches(options::OPT_Ofast))
OOpt = "3";
else if (A->getOption().matches(options::OPT_O)) {
OOpt = A->getValue();
if (OOpt == "g")
OOpt = "1";
else if (OOpt == "s" || OOpt == "z")
OOpt = "2";
} else if (A->getOption().matches(options::OPT_O0))
OOpt = "0";
if (!OOpt.empty())
CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=O") + OOpt));
}
if (Args.hasArg(options::OPT_gsplit_dwarf)) {
CmdArgs.push_back(
Args.MakeArgString(Twine("-plugin-opt=dwo_dir=") +
Output.getFilename() + "_dwo"));
}
if (IsThinLTO)
CmdArgs.push_back("-plugin-opt=thinlto");
StringRef Parallelism = getLTOParallelism(Args, D);
if (!Parallelism.empty())
CmdArgs.push_back(
Args.MakeArgString("-plugin-opt=jobs=" + Twine(Parallelism)));
// If an explicit debugger tuning argument appeared, pass it along.
if (Arg *A = Args.getLastArg(options::OPT_gTune_Group,
options::OPT_ggdbN_Group)) {
if (A->getOption().matches(options::OPT_glldb))
CmdArgs.push_back("-plugin-opt=-debugger-tune=lldb");
else if (A->getOption().matches(options::OPT_gsce))
CmdArgs.push_back("-plugin-opt=-debugger-tune=sce");
else
CmdArgs.push_back("-plugin-opt=-debugger-tune=gdb");
}
bool UseSeparateSections =
isUseSeparateSections(ToolChain.getEffectiveTriple());
if (Args.hasFlag(options::OPT_ffunction_sections,
options::OPT_fno_function_sections, UseSeparateSections)) {
CmdArgs.push_back("-plugin-opt=-function-sections");
}
if (Args.hasFlag(options::OPT_fdata_sections, options::OPT_fno_data_sections,
UseSeparateSections)) {
CmdArgs.push_back("-plugin-opt=-data-sections");
}
if (Arg *A = getLastProfileSampleUseArg(Args)) {
StringRef FName = A->getValue();
if (!llvm::sys::fs::exists(FName))
D.Diag(diag::err_drv_no_such_file) << FName;
else
CmdArgs.push_back(
Args.MakeArgString(Twine("-plugin-opt=sample-profile=") + FName));
}
auto *CSPGOGenerateArg = Args.getLastArg(options::OPT_fcs_profile_generate,
options::OPT_fcs_profile_generate_EQ,
options::OPT_fno_profile_generate);
if (CSPGOGenerateArg &&
CSPGOGenerateArg->getOption().matches(options::OPT_fno_profile_generate))
CSPGOGenerateArg = nullptr;
auto *ProfileUseArg = getLastProfileUseArg(Args);
if (CSPGOGenerateArg) {
CmdArgs.push_back(Args.MakeArgString("-plugin-opt=cs-profile-generate"));
if (CSPGOGenerateArg->getOption().matches(
options::OPT_fcs_profile_generate_EQ)) {
SmallString<128> Path(CSPGOGenerateArg->getValue());
llvm::sys::path::append(Path, "default_%m.profraw");
CmdArgs.push_back(
Args.MakeArgString(Twine("-plugin-opt=cs-profile-path=") + Path));
} else
CmdArgs.push_back(
Args.MakeArgString("-plugin-opt=cs-profile-path=default_%m.profraw"));
} else if (ProfileUseArg) {
SmallString<128> Path(
ProfileUseArg->getNumValues() == 0 ? "" : ProfileUseArg->getValue());
if (Path.empty() || llvm::sys::fs::is_directory(Path))
llvm::sys::path::append(Path, "default.profdata");
CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=cs-profile-path=") +
Path));
}
// Need this flag to turn on new pass manager via Gold plugin.
if (Args.hasFlag(options::OPT_fexperimental_new_pass_manager,
options::OPT_fno_experimental_new_pass_manager,
/* Default */ ENABLE_EXPERIMENTAL_NEW_PASS_MANAGER)) {
CmdArgs.push_back("-plugin-opt=new-pass-manager");
}
// Setup statistics file output.
SmallString<128> StatsFile = getStatsFileName(Args, Output, Input, D);
if (!StatsFile.empty())
CmdArgs.push_back(
Args.MakeArgString(Twine("-plugin-opt=stats-file=") + StatsFile));
addX86AlignBranchArgs(D, Args, CmdArgs, /*IsLTO=*/true);
}
void tools::addArchSpecificRPath(const ToolChain &TC, const ArgList &Args,
ArgStringList &CmdArgs) {
// Enable -frtlib-add-rpath by default for the case of VE.
const bool IsVE = TC.getTriple().isVE();
bool DefaultValue = IsVE;
if (!Args.hasFlag(options::OPT_frtlib_add_rpath,
options::OPT_fno_rtlib_add_rpath, DefaultValue))
return;
std::string CandidateRPath = TC.getArchSpecificLibPath();
if (TC.getVFS().exists(CandidateRPath)) {
CmdArgs.push_back("-rpath");
CmdArgs.push_back(Args.MakeArgString(CandidateRPath.c_str()));
}
}
bool tools::addOpenMPRuntime(ArgStringList &CmdArgs, const ToolChain &TC,
const ArgList &Args, bool ForceStaticHostRuntime,
bool IsOffloadingHost, bool GompNeedsRT) {
if (!Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
options::OPT_fno_openmp, false))
return false;
Driver::OpenMPRuntimeKind RTKind = TC.getDriver().getOpenMPRuntime(Args);
if (RTKind == Driver::OMPRT_Unknown)
// Already diagnosed.
return false;
if (ForceStaticHostRuntime)
CmdArgs.push_back("-Bstatic");
switch (RTKind) {
case Driver::OMPRT_OMP:
CmdArgs.push_back("-lomp");
break;
case Driver::OMPRT_GOMP:
CmdArgs.push_back("-lgomp");
break;
case Driver::OMPRT_IOMP5:
CmdArgs.push_back("-liomp5");
break;
case Driver::OMPRT_Unknown:
break;
}
if (ForceStaticHostRuntime)
CmdArgs.push_back("-Bdynamic");
if (RTKind == Driver::OMPRT_GOMP && GompNeedsRT)
CmdArgs.push_back("-lrt");
if (IsOffloadingHost)
CmdArgs.push_back("-lomptarget");
addArchSpecificRPath(TC, Args, CmdArgs);
return true;
}
static void addSanitizerRuntime(const ToolChain &TC, const ArgList &Args,
ArgStringList &CmdArgs, StringRef Sanitizer,
bool IsShared, bool IsWhole) {
// Wrap any static runtimes that must be forced into executable in
// whole-archive.
if (IsWhole) CmdArgs.push_back("--whole-archive");
CmdArgs.push_back(TC.getCompilerRTArgString(
Args, Sanitizer, IsShared ? ToolChain::FT_Shared : ToolChain::FT_Static));
if (IsWhole) CmdArgs.push_back("--no-whole-archive");
if (IsShared) {
addArchSpecificRPath(TC, Args, CmdArgs);
}
}
// Tries to use a file with the list of dynamic symbols that need to be exported
// from the runtime library. Returns true if the file was found.
static bool addSanitizerDynamicList(const ToolChain &TC, const ArgList &Args,
ArgStringList &CmdArgs,
StringRef Sanitizer) {
// Solaris ld defaults to --export-dynamic behaviour but doesn't support
// the option, so don't try to pass it.
if (TC.getTriple().getOS() == llvm::Triple::Solaris)
return true;
// Myriad is static linking only. Furthermore, some versions of its
// linker have the bug where --export-dynamic overrides -static, so
// don't use --export-dynamic on that platform.
if (TC.getTriple().getVendor() == llvm::Triple::Myriad)
return true;
SmallString<128> SanRT(TC.getCompilerRT(Args, Sanitizer));
if (llvm::sys::fs::exists(SanRT + ".syms")) {
CmdArgs.push_back(Args.MakeArgString("--dynamic-list=" + SanRT + ".syms"));
return true;
}
return false;
}
void tools::linkSanitizerRuntimeDeps(const ToolChain &TC,
ArgStringList &CmdArgs) {
// Fuchsia never needs these. Any sanitizer runtimes with system
// dependencies use the `.deplibs` feature instead.
if (TC.getTriple().isOSFuchsia())
return;
// Force linking against the system libraries sanitizers depends on
// (see PR15823 why this is necessary).
CmdArgs.push_back("--no-as-needed");
// There's no libpthread or librt on RTEMS & Android.
if (TC.getTriple().getOS() != llvm::Triple::RTEMS &&
!TC.getTriple().isAndroid()) {
CmdArgs.push_back("-lpthread");
if (!TC.getTriple().isOSOpenBSD())
CmdArgs.push_back("-lrt");
}
CmdArgs.push_back("-lm");
// There's no libdl on all OSes.
if (!TC.getTriple().isOSFreeBSD() &&
!TC.getTriple().isOSNetBSD() &&
!TC.getTriple().isOSOpenBSD() &&
TC.getTriple().getOS() != llvm::Triple::RTEMS)
CmdArgs.push_back("-ldl");
// Required for backtrace on some OSes
if (TC.getTriple().isOSFreeBSD() ||
TC.getTriple().isOSNetBSD())
CmdArgs.push_back("-lexecinfo");
}
static void
collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
SmallVectorImpl<StringRef> &SharedRuntimes,
SmallVectorImpl<StringRef> &StaticRuntimes,
SmallVectorImpl<StringRef> &NonWholeStaticRuntimes,
SmallVectorImpl<StringRef> &HelperStaticRuntimes,
SmallVectorImpl<StringRef> &RequiredSymbols) {
const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
// Collect shared runtimes.
if (SanArgs.needsSharedRt()) {
if (SanArgs.needsAsanRt() && SanArgs.linkRuntimes()) {
SharedRuntimes.push_back("asan");
if (!Args.hasArg(options::OPT_shared) && !TC.getTriple().isAndroid())
HelperStaticRuntimes.push_back("asan-preinit");
}
if (SanArgs.needsUbsanRt() && SanArgs.linkRuntimes()) {
if (SanArgs.requiresMinimalRuntime())
SharedRuntimes.push_back("ubsan_minimal");
else
SharedRuntimes.push_back("ubsan_standalone");
}
if (SanArgs.needsScudoRt() && SanArgs.linkRuntimes()) {
if (SanArgs.requiresMinimalRuntime())
SharedRuntimes.push_back("scudo_minimal");
else
SharedRuntimes.push_back("scudo");
}
if (SanArgs.needsHwasanRt() && SanArgs.linkRuntimes())
SharedRuntimes.push_back("hwasan");
}
// The stats_client library is also statically linked into DSOs.
if (SanArgs.needsStatsRt() && SanArgs.linkRuntimes())
StaticRuntimes.push_back("stats_client");
// Collect static runtimes.
if (Args.hasArg(options::OPT_shared)) {
// Don't link static runtimes into DSOs.
return;
}
// Each static runtime that has a DSO counterpart above is excluded below,
// but runtimes that exist only as static are not affected by needsSharedRt.
if (!SanArgs.needsSharedRt() && SanArgs.needsAsanRt() && SanArgs.linkRuntimes()) {
StaticRuntimes.push_back("asan");
if (SanArgs.linkCXXRuntimes())
StaticRuntimes.push_back("asan_cxx");
}
if (!SanArgs.needsSharedRt() && SanArgs.needsHwasanRt() && SanArgs.linkRuntimes()) {
StaticRuntimes.push_back("hwasan");
if (SanArgs.linkCXXRuntimes())
StaticRuntimes.push_back("hwasan_cxx");
}
if (SanArgs.needsDfsanRt() && SanArgs.linkRuntimes())
StaticRuntimes.push_back("dfsan");
if (SanArgs.needsLsanRt() && SanArgs.linkRuntimes())
StaticRuntimes.push_back("lsan");
if (SanArgs.needsMsanRt() && SanArgs.linkRuntimes()) {
StaticRuntimes.push_back("msan");
if (SanArgs.linkCXXRuntimes())
StaticRuntimes.push_back("msan_cxx");
}
if (SanArgs.needsTsanRt() && SanArgs.linkRuntimes()) {
StaticRuntimes.push_back("tsan");
if (SanArgs.linkCXXRuntimes())
StaticRuntimes.push_back("tsan_cxx");
}
if (!SanArgs.needsSharedRt() && SanArgs.needsUbsanRt() && SanArgs.linkRuntimes()) {
if (SanArgs.requiresMinimalRuntime()) {
StaticRuntimes.push_back("ubsan_minimal");
} else {
StaticRuntimes.push_back("ubsan_standalone");
if (SanArgs.linkCXXRuntimes())
StaticRuntimes.push_back("ubsan_standalone_cxx");
}
}
if (SanArgs.needsSafeStackRt() && SanArgs.linkRuntimes()) {
NonWholeStaticRuntimes.push_back("safestack");
RequiredSymbols.push_back("__safestack_init");
}
if (!(SanArgs.needsSharedRt() && SanArgs.needsUbsanRt() && SanArgs.linkRuntimes())) {
if (SanArgs.needsCfiRt() && SanArgs.linkRuntimes())
StaticRuntimes.push_back("cfi");
if (SanArgs.needsCfiDiagRt() && SanArgs.linkRuntimes()) {
StaticRuntimes.push_back("cfi_diag");
if (SanArgs.linkCXXRuntimes())
StaticRuntimes.push_back("ubsan_standalone_cxx");
}
}
if (SanArgs.needsStatsRt() && SanArgs.linkRuntimes()) {
NonWholeStaticRuntimes.push_back("stats");
RequiredSymbols.push_back("__sanitizer_stats_register");
}
if (!SanArgs.needsSharedRt() && SanArgs.needsScudoRt() && SanArgs.linkRuntimes()) {
if (SanArgs.requiresMinimalRuntime()) {
StaticRuntimes.push_back("scudo_minimal");
if (SanArgs.linkCXXRuntimes())
StaticRuntimes.push_back("scudo_cxx_minimal");
} else {
StaticRuntimes.push_back("scudo");
if (SanArgs.linkCXXRuntimes())
StaticRuntimes.push_back("scudo_cxx");
}
}
}
// Should be called before we add system libraries (C++ ABI, libstdc++/libc++,
// C runtime, etc). Returns true if sanitizer system deps need to be linked in.
bool tools::addSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
ArgStringList &CmdArgs) {
SmallVector<StringRef, 4> SharedRuntimes, StaticRuntimes,
NonWholeStaticRuntimes, HelperStaticRuntimes, RequiredSymbols;
collectSanitizerRuntimes(TC, Args, SharedRuntimes, StaticRuntimes,
NonWholeStaticRuntimes, HelperStaticRuntimes,
RequiredSymbols);
const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
// Inject libfuzzer dependencies.
if (SanArgs.needsFuzzer() && SanArgs.linkRuntimes() &&
!Args.hasArg(options::OPT_shared)) {
addSanitizerRuntime(TC, Args, CmdArgs, "fuzzer", false, true);
if (SanArgs.needsFuzzerInterceptors())
addSanitizerRuntime(TC, Args, CmdArgs, "fuzzer_interceptors", false,
true);
if (!Args.hasArg(clang::driver::options::OPT_nostdlibxx))
TC.AddCXXStdlibLibArgs(Args, CmdArgs);
}
for (auto RT : SharedRuntimes)
addSanitizerRuntime(TC, Args, CmdArgs, RT, true, false);
for (auto RT : HelperStaticRuntimes)
addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
bool AddExportDynamic = false;
for (auto RT : StaticRuntimes) {
addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
}
for (auto RT : NonWholeStaticRuntimes) {
addSanitizerRuntime(TC, Args, CmdArgs, RT, false, false);
AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
}
for (auto S : RequiredSymbols) {
CmdArgs.push_back("-u");
CmdArgs.push_back(Args.MakeArgString(S));
}
// If there is a static runtime with no dynamic list, force all the symbols
// to be dynamic to be sure we export sanitizer interface functions.
if (AddExportDynamic)
CmdArgs.push_back("--export-dynamic");
if (SanArgs.hasCrossDsoCfi() && !AddExportDynamic)
CmdArgs.push_back("--export-dynamic-symbol=__cfi_check");
return !StaticRuntimes.empty() || !NonWholeStaticRuntimes.empty();
}
bool tools::addXRayRuntime(const ToolChain&TC, const ArgList &Args, ArgStringList &CmdArgs) {
if (Args.hasArg(options::OPT_shared))
return false;
if (TC.getXRayArgs().needsXRayRt()) {
CmdArgs.push_back("-whole-archive");
CmdArgs.push_back(TC.getCompilerRTArgString(Args, "xray"));
for (const auto &Mode : TC.getXRayArgs().modeList())
CmdArgs.push_back(TC.getCompilerRTArgString(Args, Mode));
CmdArgs.push_back("-no-whole-archive");
return true;
}
return false;
}
void tools::linkXRayRuntimeDeps(const ToolChain &TC, ArgStringList &CmdArgs) {
CmdArgs.push_back("--no-as-needed");
CmdArgs.push_back("-lpthread");
if (!TC.getTriple().isOSOpenBSD())
CmdArgs.push_back("-lrt");
CmdArgs.push_back("-lm");
if (!TC.getTriple().isOSFreeBSD() &&
!TC.getTriple().isOSNetBSD() &&
!TC.getTriple().isOSOpenBSD())
CmdArgs.push_back("-ldl");
}
bool tools::areOptimizationsEnabled(const ArgList &Args) {
// Find the last -O arg and see if it is non-zero.
if (Arg *A = Args.getLastArg(options::OPT_O_Group))
return !A->getOption().matches(options::OPT_O0);
// Defaults to -O0.
return false;
}
const char *tools::SplitDebugName(const ArgList &Args, const InputInfo &Input,
const InputInfo &Output) {
if (Arg *A = Args.getLastArg(options::OPT_gsplit_dwarf_EQ))
if (StringRef(A->getValue()) == "single")
return Args.MakeArgString(Output.getFilename());
Arg *FinalOutput = Args.getLastArg(options::OPT_o);
if (FinalOutput && Args.hasArg(options::OPT_c)) {
SmallString<128> T(FinalOutput->getValue());
llvm::sys::path::replace_extension(T, "dwo");
return Args.MakeArgString(T);
} else {
// Use the compilation dir.
SmallString<128> T(
Args.getLastArgValue(options::OPT_fdebug_compilation_dir));
SmallString<128> F(llvm::sys::path::stem(Input.getBaseInput()));
llvm::sys::path::replace_extension(F, "dwo");
T += F;
return Args.MakeArgString(F);
}
}
void tools::SplitDebugInfo(const ToolChain &TC, Compilation &C, const Tool &T,
const JobAction &JA, const ArgList &Args,
const InputInfo &Output, const char *OutFile) {
ArgStringList ExtractArgs;
ExtractArgs.push_back("--extract-dwo");
ArgStringList StripArgs;
StripArgs.push_back("--strip-dwo");
// Grabbing the output of the earlier compile step.
StripArgs.push_back(Output.getFilename());
ExtractArgs.push_back(Output.getFilename());
ExtractArgs.push_back(OutFile);
const char *Exec =
Args.MakeArgString(TC.GetProgramPath(CLANG_DEFAULT_OBJCOPY));
InputInfo II(types::TY_Object, Output.getFilename(), Output.getFilename());
// First extract the dwo sections.
C.addCommand(std::make_unique<Command>(
JA, T, ResponseFileSupport::AtFileCurCP(), Exec, ExtractArgs, II));
// Then remove them from the original .o file.
C.addCommand(std::make_unique<Command>(
JA, T, ResponseFileSupport::AtFileCurCP(), Exec, StripArgs, II));
}
// Claim options we don't want to warn if they are unused. We do this for
// options that build systems might add but are unused when assembling or only
// running the preprocessor for example.
void tools::claimNoWarnArgs(const ArgList &Args) {
// Don't warn about unused -f(no-)?lto. This can happen when we're
// preprocessing, precompiling or assembling.
Args.ClaimAllArgs(options::OPT_flto_EQ);
Args.ClaimAllArgs(options::OPT_flto);
Args.ClaimAllArgs(options::OPT_fno_lto);
}
Arg *tools::getLastProfileUseArg(const ArgList &Args) {
auto *ProfileUseArg = Args.getLastArg(
options::OPT_fprofile_instr_use, options::OPT_fprofile_instr_use_EQ,
options::OPT_fprofile_use, options::OPT_fprofile_use_EQ,
options::OPT_fno_profile_instr_use);
if (ProfileUseArg &&
ProfileUseArg->getOption().matches(options::OPT_fno_profile_instr_use))
ProfileUseArg = nullptr;
return ProfileUseArg;
}
Arg *tools::getLastProfileSampleUseArg(const ArgList &Args) {
auto *ProfileSampleUseArg = Args.getLastArg(
options::OPT_fprofile_sample_use, options::OPT_fprofile_sample_use_EQ,
options::OPT_fauto_profile, options::OPT_fauto_profile_EQ,
options::OPT_fno_profile_sample_use, options::OPT_fno_auto_profile);
if (ProfileSampleUseArg &&
(ProfileSampleUseArg->getOption().matches(
options::OPT_fno_profile_sample_use) ||
ProfileSampleUseArg->getOption().matches(options::OPT_fno_auto_profile)))
return nullptr;
return Args.getLastArg(options::OPT_fprofile_sample_use_EQ,
options::OPT_fauto_profile_EQ);
}
/// Parses the various -fpic/-fPIC/-fpie/-fPIE arguments. Then,
/// smooshes them together with platform defaults, to decide whether
/// this compile should be using PIC mode or not. Returns a tuple of
/// (RelocationModel, PICLevel, IsPIE).
std::tuple<llvm::Reloc::Model, unsigned, bool>
tools::ParsePICArgs(const ToolChain &ToolChain, const ArgList &Args) {
const llvm::Triple &EffectiveTriple = ToolChain.getEffectiveTriple();
const llvm::Triple &Triple = ToolChain.getTriple();
bool PIE = ToolChain.isPIEDefault();
bool PIC = PIE || ToolChain.isPICDefault();
// The Darwin/MachO default to use PIC does not apply when using -static.
if (Triple.isOSBinFormatMachO() && Args.hasArg(options::OPT_static))
PIE = PIC = false;
bool IsPICLevelTwo = PIC;
bool KernelOrKext =
Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
// Android-specific defaults for PIC/PIE
if (Triple.isAndroid()) {
switch (Triple.getArch()) {
case llvm::Triple::arm:
case llvm::Triple::armeb:
case llvm::Triple::thumb:
case llvm::Triple::thumbeb:
case llvm::Triple::aarch64:
case llvm::Triple::mips:
case llvm::Triple::mipsel:
case llvm::Triple::mips64:
case llvm::Triple::mips64el:
PIC = true; // "-fpic"
break;
case llvm::Triple::x86:
case llvm::Triple::x86_64:
PIC = true; // "-fPIC"
IsPICLevelTwo = true;
break;
default:
break;
}
}
// OpenBSD-specific defaults for PIE
if (Triple.isOSOpenBSD()) {
switch (ToolChain.getArch()) {
case llvm::Triple::arm:
case llvm::Triple::aarch64:
case llvm::Triple::mips64:
case llvm::Triple::mips64el:
case llvm::Triple::x86: