1 //===--- Solaris.cpp - Solaris ToolChain Implementations --------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "Solaris.h" 10 #include "CommonArgs.h" 11 #include "clang/Basic/LangStandard.h" 12 #include "clang/Config/config.h" 13 #include "clang/Driver/Compilation.h" 14 #include "clang/Driver/Driver.h" 15 #include "clang/Driver/DriverDiagnostic.h" 16 #include "clang/Driver/Options.h" 17 #include "clang/Driver/SanitizerArgs.h" 18 #include "clang/Driver/ToolChain.h" 19 #include "llvm/Option/ArgList.h" 20 #include "llvm/Support/FileSystem.h" 21 #include "llvm/Support/Path.h" 22 23 using namespace clang::driver; 24 using namespace clang::driver::tools; 25 using namespace clang::driver::toolchains; 26 using namespace clang; 27 using namespace llvm::opt; 28 29 void solaris::Assembler::ConstructJob(Compilation &C, const JobAction &JA, 30 const InputInfo &Output, 31 const InputInfoList &Inputs, 32 const ArgList &Args, 33 const char *LinkingOutput) const { 34 claimNoWarnArgs(Args); 35 ArgStringList CmdArgs; 36 37 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler); 38 39 CmdArgs.push_back("-o"); 40 CmdArgs.push_back(Output.getFilename()); 41 42 for (const auto &II : Inputs) 43 CmdArgs.push_back(II.getFilename()); 44 45 const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as")); 46 C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(), 47 Exec, CmdArgs, Inputs, Output)); 48 } 49 50 static bool getPIE(const ArgList &Args, const ToolChain &TC) { 51 if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_static) || 52 Args.hasArg(options::OPT_r)) 53 return false; 54 55 Arg *A = Args.getLastArg(options::OPT_pie, options::OPT_no_pie, 56 options::OPT_nopie); 57 if (!A) 58 return TC.isPIEDefault(Args); 59 return A->getOption().matches(options::OPT_pie); 60 } 61 62 void solaris::Linker::ConstructJob(Compilation &C, const JobAction &JA, 63 const InputInfo &Output, 64 const InputInfoList &Inputs, 65 const ArgList &Args, 66 const char *LinkingOutput) const { 67 const bool IsPIE = getPIE(Args, getToolChain()); 68 ArgStringList CmdArgs; 69 70 // Demangle C++ names in errors 71 CmdArgs.push_back("-C"); 72 73 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_shared)) { 74 CmdArgs.push_back("-e"); 75 CmdArgs.push_back("_start"); 76 } 77 78 if (IsPIE) { 79 CmdArgs.push_back("-z"); 80 CmdArgs.push_back("type=pie"); 81 } 82 83 if (Args.hasArg(options::OPT_static)) { 84 CmdArgs.push_back("-Bstatic"); 85 CmdArgs.push_back("-dn"); 86 } else { 87 CmdArgs.push_back("-Bdynamic"); 88 if (Args.hasArg(options::OPT_shared)) { 89 CmdArgs.push_back("-shared"); 90 } 91 92 // libpthread has been folded into libc since Solaris 10, no need to do 93 // anything for pthreads. Claim argument to avoid warning. 94 Args.ClaimAllArgs(options::OPT_pthread); 95 Args.ClaimAllArgs(options::OPT_pthreads); 96 } 97 98 if (Output.isFilename()) { 99 CmdArgs.push_back("-o"); 100 CmdArgs.push_back(Output.getFilename()); 101 } else { 102 assert(Output.isNothing() && "Invalid output."); 103 } 104 105 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles, 106 options::OPT_r)) { 107 if (!Args.hasArg(options::OPT_shared)) 108 CmdArgs.push_back( 109 Args.MakeArgString(getToolChain().GetFilePath("crt1.o"))); 110 111 CmdArgs.push_back(Args.MakeArgString(getToolChain().GetFilePath("crti.o"))); 112 113 const Arg *Std = Args.getLastArg(options::OPT_std_EQ, options::OPT_ansi); 114 bool HaveAnsi = false; 115 const LangStandard *LangStd = nullptr; 116 if (Std) { 117 HaveAnsi = Std->getOption().matches(options::OPT_ansi); 118 if (!HaveAnsi) 119 LangStd = LangStandard::getLangStandardForName(Std->getValue()); 120 } 121 122 const char *values_X = "values-Xa.o"; 123 // Use values-Xc.o for -ansi, -std=c*, -std=iso9899:199409. 124 if (HaveAnsi || (LangStd && !LangStd->isGNUMode())) 125 values_X = "values-Xc.o"; 126 CmdArgs.push_back(Args.MakeArgString(getToolChain().GetFilePath(values_X))); 127 128 const char *values_xpg = "values-xpg6.o"; 129 // Use values-xpg4.o for -std=c90, -std=gnu90, -std=iso9899:199409. 130 if (LangStd && LangStd->getLanguage() == Language::C && !LangStd->isC99()) 131 values_xpg = "values-xpg4.o"; 132 CmdArgs.push_back( 133 Args.MakeArgString(getToolChain().GetFilePath(values_xpg))); 134 135 const char *crtbegin = nullptr; 136 if (Args.hasArg(options::OPT_shared) || IsPIE) 137 crtbegin = "crtbeginS.o"; 138 else 139 crtbegin = "crtbegin.o"; 140 CmdArgs.push_back(Args.MakeArgString(getToolChain().GetFilePath(crtbegin))); 141 // Add crtfastmath.o if available and fast math is enabled. 142 getToolChain().addFastMathRuntimeIfAvailable(Args, CmdArgs); 143 } 144 145 getToolChain().AddFilePathLibArgs(Args, CmdArgs); 146 147 Args.AddAllArgs(CmdArgs, 148 {options::OPT_L, options::OPT_T_Group, options::OPT_r}); 149 150 bool NeedsSanitizerDeps = addSanitizerRuntimes(getToolChain(), Args, CmdArgs); 151 AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA); 152 153 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs, 154 options::OPT_r)) { 155 if (getToolChain().ShouldLinkCXXStdlib(Args)) 156 getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs); 157 if (Args.hasArg(options::OPT_fstack_protector) || 158 Args.hasArg(options::OPT_fstack_protector_strong) || 159 Args.hasArg(options::OPT_fstack_protector_all)) { 160 // Explicitly link ssp libraries, not folded into Solaris libc. 161 CmdArgs.push_back("-lssp_nonshared"); 162 CmdArgs.push_back("-lssp"); 163 } 164 // LLVM support for atomics on 32-bit SPARC V8+ is incomplete, so 165 // forcibly link with libatomic as a workaround. 166 if (getToolChain().getTriple().getArch() == llvm::Triple::sparc) { 167 CmdArgs.push_back(getAsNeededOption(getToolChain(), true)); 168 CmdArgs.push_back("-latomic"); 169 CmdArgs.push_back(getAsNeededOption(getToolChain(), false)); 170 } 171 CmdArgs.push_back("-lgcc_s"); 172 CmdArgs.push_back("-lc"); 173 if (!Args.hasArg(options::OPT_shared)) { 174 CmdArgs.push_back("-lgcc"); 175 CmdArgs.push_back("-lm"); 176 } 177 const SanitizerArgs &SA = getToolChain().getSanitizerArgs(Args); 178 if (NeedsSanitizerDeps) { 179 linkSanitizerRuntimeDeps(getToolChain(), CmdArgs); 180 181 // Work around Solaris/amd64 ld bug when calling __tls_get_addr directly. 182 // However, ld -z relax=transtls is available since Solaris 11.2, but not 183 // in Illumos. 184 if (getToolChain().getTriple().getArch() == llvm::Triple::x86_64 && 185 (SA.needsAsanRt() || SA.needsStatsRt() || 186 (SA.needsUbsanRt() && !SA.requiresMinimalRuntime()))) 187 CmdArgs.push_back("-zrelax=transtls"); 188 } 189 // Avoid AsanInitInternal cycle, Issue #64126. 190 if (getToolChain().getTriple().isX86() && SA.needsSharedRt() && 191 SA.needsAsanRt()) 192 CmdArgs.push_back("-znow"); 193 } 194 195 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles, 196 options::OPT_r)) { 197 if (Args.hasArg(options::OPT_shared) || IsPIE) 198 CmdArgs.push_back( 199 Args.MakeArgString(getToolChain().GetFilePath("crtendS.o"))); 200 else 201 CmdArgs.push_back( 202 Args.MakeArgString(getToolChain().GetFilePath("crtend.o"))); 203 CmdArgs.push_back( 204 Args.MakeArgString(getToolChain().GetFilePath("crtn.o"))); 205 } 206 207 getToolChain().addProfileRTLibs(Args, CmdArgs); 208 209 const char *Exec = Args.MakeArgString(getToolChain().GetLinkerPath()); 210 C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(), 211 Exec, CmdArgs, Inputs, Output)); 212 } 213 214 static StringRef getSolarisLibSuffix(const llvm::Triple &Triple) { 215 switch (Triple.getArch()) { 216 case llvm::Triple::x86: 217 case llvm::Triple::sparc: 218 break; 219 case llvm::Triple::x86_64: 220 return "/amd64"; 221 case llvm::Triple::sparcv9: 222 return "/sparcv9"; 223 default: 224 llvm_unreachable("Unsupported architecture"); 225 } 226 return ""; 227 } 228 229 /// Solaris - Solaris tool chain which can call as(1) and ld(1) directly. 230 231 Solaris::Solaris(const Driver &D, const llvm::Triple &Triple, 232 const ArgList &Args) 233 : Generic_ELF(D, Triple, Args) { 234 235 GCCInstallation.init(Triple, Args); 236 237 StringRef LibSuffix = getSolarisLibSuffix(Triple); 238 path_list &Paths = getFilePaths(); 239 if (GCCInstallation.isValid()) { 240 // On Solaris gcc uses both an architecture-specific path with triple in it 241 // as well as a more generic lib path (+arch suffix). 242 addPathIfExists(D, 243 GCCInstallation.getInstallPath() + 244 GCCInstallation.getMultilib().gccSuffix(), 245 Paths); 246 addPathIfExists(D, GCCInstallation.getParentLibPath() + LibSuffix, Paths); 247 } 248 249 // If we are currently running Clang inside of the requested system root, 250 // add its parent library path to those searched. 251 if (StringRef(D.Dir).startswith(D.SysRoot)) 252 addPathIfExists(D, D.Dir + "/../lib", Paths); 253 254 addPathIfExists(D, D.SysRoot + "/usr/lib" + LibSuffix, Paths); 255 } 256 257 SanitizerMask Solaris::getSupportedSanitizers() const { 258 const bool IsX86 = getTriple().getArch() == llvm::Triple::x86; 259 SanitizerMask Res = ToolChain::getSupportedSanitizers(); 260 // FIXME: Omit X86_64 until 64-bit support is figured out. 261 if (IsX86) { 262 Res |= SanitizerKind::Address; 263 Res |= SanitizerKind::PointerCompare; 264 Res |= SanitizerKind::PointerSubtract; 265 } 266 Res |= SanitizerKind::Vptr; 267 return Res; 268 } 269 270 Tool *Solaris::buildAssembler() const { 271 return new tools::solaris::Assembler(*this); 272 } 273 274 Tool *Solaris::buildLinker() const { return new tools::solaris::Linker(*this); } 275 276 void Solaris::AddClangSystemIncludeArgs(const ArgList &DriverArgs, 277 ArgStringList &CC1Args) const { 278 const Driver &D = getDriver(); 279 280 if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc)) 281 return; 282 283 if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) 284 addSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/local/include"); 285 286 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) { 287 SmallString<128> P(D.ResourceDir); 288 llvm::sys::path::append(P, "include"); 289 addSystemInclude(DriverArgs, CC1Args, P); 290 } 291 292 if (DriverArgs.hasArg(options::OPT_nostdlibinc)) 293 return; 294 295 // Check for configure-time C include directories. 296 StringRef CIncludeDirs(C_INCLUDE_DIRS); 297 if (CIncludeDirs != "") { 298 SmallVector<StringRef, 5> dirs; 299 CIncludeDirs.split(dirs, ":"); 300 for (StringRef dir : dirs) { 301 StringRef Prefix = 302 llvm::sys::path::is_absolute(dir) ? "" : StringRef(D.SysRoot); 303 addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir); 304 } 305 return; 306 } 307 308 // Add include directories specific to the selected multilib set and multilib. 309 if (GCCInstallation.isValid()) { 310 const MultilibSet::IncludeDirsFunc &Callback = 311 Multilibs.includeDirsCallback(); 312 if (Callback) { 313 for (const auto &Path : Callback(GCCInstallation.getMultilib())) 314 addExternCSystemIncludeIfExists( 315 DriverArgs, CC1Args, GCCInstallation.getInstallPath() + Path); 316 } 317 } 318 319 addExternCSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/include"); 320 } 321 322 void Solaris::addLibStdCxxIncludePaths( 323 const llvm::opt::ArgList &DriverArgs, 324 llvm::opt::ArgStringList &CC1Args) const { 325 // We need a detected GCC installation on Solaris (similar to Linux) 326 // to provide libstdc++'s headers. 327 if (!GCCInstallation.isValid()) 328 return; 329 330 // By default, look for the C++ headers in an include directory adjacent to 331 // the lib directory of the GCC installation. 332 // On Solaris this usually looks like /usr/gcc/X.Y/include/c++/X.Y.Z 333 StringRef LibDir = GCCInstallation.getParentLibPath(); 334 StringRef TripleStr = GCCInstallation.getTriple().str(); 335 const Multilib &Multilib = GCCInstallation.getMultilib(); 336 const GCCVersion &Version = GCCInstallation.getVersion(); 337 338 // The primary search for libstdc++ supports multiarch variants. 339 addLibStdCXXIncludePaths(LibDir.str() + "/../include/c++/" + Version.Text, 340 TripleStr, Multilib.includeSuffix(), DriverArgs, 341 CC1Args); 342 } 343