1 //===--- Fuchsia.cpp - Fuchsia ToolChain Implementations --------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #include "Fuchsia.h" 11 #include "CommonArgs.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 "llvm/Option/ArgList.h" 19 #include "llvm/Support/Path.h" 20 21 using namespace clang::driver; 22 using namespace clang::driver::toolchains; 23 using namespace clang::driver::tools; 24 using namespace clang; 25 using namespace llvm::opt; 26 27 void fuchsia::Linker::ConstructJob(Compilation &C, const JobAction &JA, 28 const InputInfo &Output, 29 const InputInfoList &Inputs, 30 const ArgList &Args, 31 const char *LinkingOutput) const { 32 const toolchains::Fuchsia &ToolChain = 33 static_cast<const toolchains::Fuchsia &>(getToolChain()); 34 const Driver &D = ToolChain.getDriver(); 35 36 ArgStringList CmdArgs; 37 38 // Silence warning for "clang -g foo.o -o foo" 39 Args.ClaimAllArgs(options::OPT_g_Group); 40 // and "clang -emit-llvm foo.o -o foo" 41 Args.ClaimAllArgs(options::OPT_emit_llvm); 42 // and for "clang -w foo.o -o foo". Other warning options are already 43 // handled somewhere else. 44 Args.ClaimAllArgs(options::OPT_w); 45 46 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath()); 47 if (llvm::sys::path::filename(Exec).equals_lower("ld.lld") || 48 llvm::sys::path::stem(Exec).equals_lower("ld.lld")) { 49 CmdArgs.push_back("-z"); 50 CmdArgs.push_back("rodynamic"); 51 } 52 53 if (!D.SysRoot.empty()) 54 CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot)); 55 56 if (!Args.hasArg(options::OPT_shared) && !Args.hasArg(options::OPT_r)) 57 CmdArgs.push_back("-pie"); 58 59 if (Args.hasArg(options::OPT_rdynamic)) 60 CmdArgs.push_back("-export-dynamic"); 61 62 if (Args.hasArg(options::OPT_s)) 63 CmdArgs.push_back("-s"); 64 65 if (Args.hasArg(options::OPT_r)) { 66 CmdArgs.push_back("-r"); 67 } else { 68 CmdArgs.push_back("--build-id"); 69 CmdArgs.push_back("--hash-style=gnu"); 70 } 71 72 CmdArgs.push_back("--eh-frame-hdr"); 73 74 if (Args.hasArg(options::OPT_static)) 75 CmdArgs.push_back("-Bstatic"); 76 else if (Args.hasArg(options::OPT_shared)) 77 CmdArgs.push_back("-shared"); 78 79 const SanitizerArgs &SanArgs = ToolChain.getSanitizerArgs(); 80 81 if (!Args.hasArg(options::OPT_shared)) { 82 std::string Dyld = D.DyldPrefix; 83 if (SanArgs.needsAsanRt() && SanArgs.needsSharedRt()) 84 Dyld += "asan/"; 85 Dyld += "ld.so.1"; 86 CmdArgs.push_back("-dynamic-linker"); 87 CmdArgs.push_back(Args.MakeArgString(Dyld)); 88 } 89 90 CmdArgs.push_back("-o"); 91 CmdArgs.push_back(Output.getFilename()); 92 93 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) { 94 if (!Args.hasArg(options::OPT_shared)) { 95 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("Scrt1.o"))); 96 } 97 } 98 99 Args.AddAllArgs(CmdArgs, options::OPT_L); 100 Args.AddAllArgs(CmdArgs, options::OPT_u); 101 102 addSanitizerPathLibArgs(ToolChain, Args, CmdArgs); 103 104 ToolChain.AddFilePathLibArgs(Args, CmdArgs); 105 106 if (D.isUsingLTO()) { 107 assert(!Inputs.empty() && "Must have at least one input."); 108 AddGoldPlugin(ToolChain, Args, CmdArgs, Output, Inputs[0], 109 D.getLTOMode() == LTOK_Thin); 110 } 111 112 bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs); 113 bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs); 114 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA); 115 ToolChain.addProfileRTLibs(Args, CmdArgs); 116 117 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) { 118 if (Args.hasArg(options::OPT_static)) 119 CmdArgs.push_back("-Bdynamic"); 120 121 if (D.CCCIsCXX()) { 122 if (ToolChain.ShouldLinkCXXStdlib(Args)) { 123 bool OnlyLibstdcxxStatic = Args.hasArg(options::OPT_static_libstdcxx) && 124 !Args.hasArg(options::OPT_static); 125 CmdArgs.push_back("--push-state"); 126 CmdArgs.push_back("--as-needed"); 127 if (OnlyLibstdcxxStatic) 128 CmdArgs.push_back("-Bstatic"); 129 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs); 130 if (OnlyLibstdcxxStatic) 131 CmdArgs.push_back("-Bdynamic"); 132 CmdArgs.push_back("-lm"); 133 CmdArgs.push_back("--pop-state"); 134 } 135 } 136 137 if (NeedsSanitizerDeps) 138 linkSanitizerRuntimeDeps(ToolChain, CmdArgs); 139 140 if (NeedsXRayDeps) 141 linkXRayRuntimeDeps(ToolChain, CmdArgs); 142 143 AddRunTimeLibs(ToolChain, D, CmdArgs, Args); 144 145 if (Args.hasArg(options::OPT_pthread) || 146 Args.hasArg(options::OPT_pthreads)) 147 CmdArgs.push_back("-lpthread"); 148 149 if (Args.hasArg(options::OPT_fsplit_stack)) 150 CmdArgs.push_back("--wrap=pthread_create"); 151 152 CmdArgs.push_back("-lc"); 153 } 154 155 C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs)); 156 } 157 158 /// Fuchsia - Fuchsia tool chain which can call as(1) and ld(1) directly. 159 160 Fuchsia::Fuchsia(const Driver &D, const llvm::Triple &Triple, 161 const ArgList &Args) 162 : ToolChain(D, Triple, Args) { 163 getProgramPaths().push_back(getDriver().getInstalledDir()); 164 if (getDriver().getInstalledDir() != D.Dir) 165 getProgramPaths().push_back(D.Dir); 166 167 if (!D.SysRoot.empty()) { 168 SmallString<128> P(D.SysRoot); 169 llvm::sys::path::append(P, "lib"); 170 getFilePaths().push_back(P.str()); 171 } 172 } 173 174 std::string Fuchsia::ComputeEffectiveClangTriple(const ArgList &Args, 175 types::ID InputType) const { 176 llvm::Triple Triple(ComputeLLVMTriple(Args, InputType)); 177 return (Triple.getArchName() + "-" + Triple.getOSName()).str(); 178 } 179 180 Tool *Fuchsia::buildLinker() const { 181 return new tools::fuchsia::Linker(*this); 182 } 183 184 ToolChain::RuntimeLibType Fuchsia::GetRuntimeLibType( 185 const ArgList &Args) const { 186 if (Arg *A = Args.getLastArg(clang::driver::options::OPT_rtlib_EQ)) { 187 StringRef Value = A->getValue(); flowoplib_flowinit(void)188 if (Value != "compiler-rt") 189 getDriver().Diag(clang::diag::err_drv_invalid_rtlib_name) 190 << A->getAsString(Args); 191 } 192 193 return ToolChain::RLT_CompilerRT; 194 } 195 196 ToolChain::CXXStdlibType 197 Fuchsia::GetCXXStdlibType(const ArgList &Args) const { 198 if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) { 199 StringRef Value = A->getValue(); flowoplib_destruct_noop(flowop_t * flowop)200 if (Value != "libc++") 201 getDriver().Diag(diag::err_drv_invalid_stdlib_name) 202 << A->getAsString(Args); 203 } 204 205 return ToolChain::CST_Libcxx; 206 } 207 208 void Fuchsia::addClangTargetOptions(const ArgList &DriverArgs, 209 ArgStringList &CC1Args, flowoplib_fileattrs(flowop_t * flowop)210 Action::OffloadKind) const { 211 if (DriverArgs.hasFlag(options::OPT_fuse_init_array, 212 options::OPT_fno_use_init_array, true)) 213 CC1Args.push_back("-fuse-init-array"); 214 } 215 216 void Fuchsia::AddClangSystemIncludeArgs(const ArgList &DriverArgs, 217 ArgStringList &CC1Args) const { 218 const Driver &D = getDriver(); 219 220 if (DriverArgs.hasArg(options::OPT_nostdinc)) 221 return; 222 223 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) { 224 SmallString<128> P(D.ResourceDir); 225 llvm::sys::path::append(P, "include"); 226 addSystemInclude(DriverArgs, CC1Args, P); 227 } 228 229 if (DriverArgs.hasArg(options::OPT_nostdlibinc)) 230 return; 231 232 // Check for configure-time C include directories. 233 StringRef CIncludeDirs(C_INCLUDE_DIRS); flowoplib_pickfile(filesetentry_t ** filep,flowop_t * flowop,int flags,int tid)234 if (CIncludeDirs != "") { 235 SmallVector<StringRef, 5> dirs; 236 CIncludeDirs.split(dirs, ":"); 237 for (StringRef dir : dirs) { 238 StringRef Prefix = 239 llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : ""; 240 addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir); 241 } 242 return; 243 } 244 245 if (!D.SysRoot.empty()) { 246 SmallString<128> P(D.SysRoot); 247 llvm::sys::path::append(P, "include"); 248 addExternCSystemInclude(DriverArgs, CC1Args, P.str()); 249 } 250 } 251 252 void Fuchsia::AddClangCXXStdlibIncludeArgs(const ArgList &DriverArgs, 253 ArgStringList &CC1Args) const { 254 if (DriverArgs.hasArg(options::OPT_nostdlibinc) || 255 DriverArgs.hasArg(options::OPT_nostdincxx)) 256 return; 257 258 switch (GetCXXStdlibType(DriverArgs)) { 259 case ToolChain::CST_Libcxx: { 260 SmallString<128> P(getDriver().ResourceDir); 261 llvm::sys::path::append(P, "include", "c++", "v1"); 262 addSystemInclude(DriverArgs, CC1Args, P.str()); 263 break; 264 } 265 266 default: 267 llvm_unreachable("invalid stdlib name"); 268 } 269 } 270 271 void Fuchsia::AddCXXStdlibLibArgs(const ArgList &Args, flowoplib_pickleafdir(filesetentry_t ** dirp,flowop_t * flowop,int flags)272 ArgStringList &CmdArgs) const { 273 switch (GetCXXStdlibType(Args)) { 274 case ToolChain::CST_Libcxx: 275 CmdArgs.push_back("-lc++"); 276 break; 277 278 case ToolChain::CST_Libstdcxx: 279 llvm_unreachable("invalid stdlib name"); 280 } 281 } 282 283 SanitizerMask Fuchsia::getSupportedSanitizers() const { 284 SanitizerMask Res = ToolChain::getSupportedSanitizers(); 285 Res |= SanitizerKind::Address; 286 Res |= SanitizerKind::Fuzzer; 287 Res |= SanitizerKind::FuzzerNoLink; 288 Res |= SanitizerKind::SafeStack; 289 Res |= SanitizerKind::Scudo; 290 return Res; 291 } 292 293 SanitizerMask Fuchsia::getDefaultSanitizers() const { 294 return SanitizerKind::SafeStack; 295 } 296