clang  6.0.0
CommonArgs.cpp
Go to the documentation of this file.
1 //===--- CommonArgs.cpp - Args handling for multiple toolchains -*- 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 "CommonArgs.h"
11 #include "InputInfo.h"
12 #include "Hexagon.h"
13 #include "Arch/AArch64.h"
14 #include "Arch/ARM.h"
15 #include "Arch/Mips.h"
16 #include "Arch/PPC.h"
17 #include "Arch/SystemZ.h"
18 #include "Arch/X86.h"
19 #include "clang/Basic/CharInfo.h"
22 #include "clang/Basic/Version.h"
24 #include "clang/Config/config.h"
25 #include "clang/Driver/Action.h"
27 #include "clang/Driver/Driver.h"
29 #include "clang/Driver/Job.h"
30 #include "clang/Driver/Options.h"
32 #include "clang/Driver/ToolChain.h"
33 #include "clang/Driver/Util.h"
34 #include "llvm/ADT/STLExtras.h"
35 #include "llvm/ADT/SmallString.h"
36 #include "llvm/ADT/StringExtras.h"
37 #include "llvm/ADT/StringSwitch.h"
38 #include "llvm/ADT/Twine.h"
39 #include "llvm/Option/Arg.h"
40 #include "llvm/Option/ArgList.h"
41 #include "llvm/Option/Option.h"
42 #include "llvm/Support/CodeGen.h"
43 #include "llvm/Support/Compression.h"
44 #include "llvm/Support/ErrorHandling.h"
45 #include "llvm/Support/FileSystem.h"
46 #include "llvm/Support/Host.h"
47 #include "llvm/Support/Path.h"
48 #include "llvm/Support/Process.h"
49 #include "llvm/Support/Program.h"
50 #include "llvm/Support/ScopedPrinter.h"
51 #include "llvm/Support/TargetParser.h"
52 #include "llvm/Support/YAMLParser.h"
53 
54 using namespace clang::driver;
55 using namespace clang::driver::tools;
56 using namespace clang;
57 using namespace llvm::opt;
58 
59 void tools::addPathIfExists(const Driver &D, const Twine &Path,
60  ToolChain::path_list &Paths) {
61  if (D.getVFS().exists(Path))
62  Paths.push_back(Path.str());
63 }
64 
65 void tools::handleTargetFeaturesGroup(const ArgList &Args,
66  std::vector<StringRef> &Features,
67  OptSpecifier Group) {
68  for (const Arg *A : Args.filtered(Group)) {
69  StringRef Name = A->getOption().getName();
70  A->claim();
71 
72  // Skip over "-m".
73  assert(Name.startswith("m") && "Invalid feature name.");
74  Name = Name.substr(1);
75 
76  bool IsNegative = Name.startswith("no-");
77  if (IsNegative)
78  Name = Name.substr(3);
79  Features.push_back(Args.MakeArgString((IsNegative ? "-" : "+") + Name));
80  }
81 }
82 
83 void tools::addDirectoryList(const ArgList &Args, ArgStringList &CmdArgs,
84  const char *ArgName, const char *EnvVar) {
85  const char *DirList = ::getenv(EnvVar);
86  bool CombinedArg = false;
87 
88  if (!DirList)
89  return; // Nothing to do.
90 
91  StringRef Name(ArgName);
92  if (Name.equals("-I") || Name.equals("-L"))
93  CombinedArg = true;
94 
95  StringRef Dirs(DirList);
96  if (Dirs.empty()) // Empty string should not add '.'.
97  return;
98 
99  StringRef::size_type Delim;
100  while ((Delim = Dirs.find(llvm::sys::EnvPathSeparator)) != StringRef::npos) {
101  if (Delim == 0) { // Leading colon.
102  if (CombinedArg) {
103  CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + "."));
104  } else {
105  CmdArgs.push_back(ArgName);
106  CmdArgs.push_back(".");
107  }
108  } else {
109  if (CombinedArg) {
110  CmdArgs.push_back(
111  Args.MakeArgString(std::string(ArgName) + Dirs.substr(0, Delim)));
112  } else {
113  CmdArgs.push_back(ArgName);
114  CmdArgs.push_back(Args.MakeArgString(Dirs.substr(0, Delim)));
115  }
116  }
117  Dirs = Dirs.substr(Delim + 1);
118  }
119 
120  if (Dirs.empty()) { // Trailing colon.
121  if (CombinedArg) {
122  CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + "."));
123  } else {
124  CmdArgs.push_back(ArgName);
125  CmdArgs.push_back(".");
126  }
127  } else { // Add the last path.
128  if (CombinedArg) {
129  CmdArgs.push_back(Args.MakeArgString(std::string(ArgName) + Dirs));
130  } else {
131  CmdArgs.push_back(ArgName);
132  CmdArgs.push_back(Args.MakeArgString(Dirs));
133  }
134  }
135 }
136 
137 void tools::AddLinkerInputs(const ToolChain &TC, const InputInfoList &Inputs,
138  const ArgList &Args, ArgStringList &CmdArgs,
139  const JobAction &JA) {
140  const Driver &D = TC.getDriver();
141 
142  // Add extra linker input arguments which are not treated as inputs
143  // (constructed via -Xarch_).
144  Args.AddAllArgValues(CmdArgs, options::OPT_Zlinker_input);
145 
146  for (const auto &II : Inputs) {
147  // If the current tool chain refers to an OpenMP offloading host, we should
148  // ignore inputs that refer to OpenMP offloading devices - they will be
149  // embedded according to a proper linker script.
150  if (auto *IA = II.getAction())
152  IA->isDeviceOffloading(Action::OFK_OpenMP))
153  continue;
154 
155  if (!TC.HasNativeLLVMSupport() && types::isLLVMIR(II.getType()))
156  // Don't try to pass LLVM inputs unless we have native support.
157  D.Diag(diag::err_drv_no_linker_llvm_support) << TC.getTripleString();
158 
159  // Add filenames immediately.
160  if (II.isFilename()) {
161  CmdArgs.push_back(II.getFilename());
162  continue;
163  }
164 
165  // Otherwise, this is a linker input argument.
166  const Arg &A = II.getInputArg();
167 
168  // Handle reserved library options.
169  if (A.getOption().matches(options::OPT_Z_reserved_lib_stdcxx))
170  TC.AddCXXStdlibLibArgs(Args, CmdArgs);
171  else if (A.getOption().matches(options::OPT_Z_reserved_lib_cckext))
172  TC.AddCCKextLibArgs(Args, CmdArgs);
173  else if (A.getOption().matches(options::OPT_z)) {
174  // Pass -z prefix for gcc linker compatibility.
175  A.claim();
176  A.render(Args, CmdArgs);
177  } else {
178  A.renderAsInput(Args, CmdArgs);
179  }
180  }
181 
182  // LIBRARY_PATH - included following the user specified library paths.
183  // and only supported on native toolchains.
184  if (!TC.isCrossCompiling()) {
185  addDirectoryList(Args, CmdArgs, "-L", "LIBRARY_PATH");
186  }
187 }
188 
189 void tools::AddTargetFeature(const ArgList &Args,
190  std::vector<StringRef> &Features,
191  OptSpecifier OnOpt, OptSpecifier OffOpt,
192  StringRef FeatureName) {
193  if (Arg *A = Args.getLastArg(OnOpt, OffOpt)) {
194  if (A->getOption().matches(OnOpt))
195  Features.push_back(Args.MakeArgString("+" + FeatureName));
196  else
197  Features.push_back(Args.MakeArgString("-" + FeatureName));
198  }
199 }
200 
201 /// Get the (LLVM) name of the R600 gpu we are targeting.
202 static std::string getR600TargetGPU(const ArgList &Args) {
203  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
204  const char *GPUName = A->getValue();
205  return llvm::StringSwitch<const char *>(GPUName)
206  .Cases("rv630", "rv635", "r600")
207  .Cases("rv610", "rv620", "rs780", "rs880")
208  .Case("rv740", "rv770")
209  .Case("palm", "cedar")
210  .Cases("sumo", "sumo2", "sumo")
211  .Case("hemlock", "cypress")
212  .Case("aruba", "cayman")
213  .Default(GPUName);
214  }
215  return "";
216 }
217 
218 static std::string getNios2TargetCPU(const ArgList &Args) {
219  Arg *A = Args.getLastArg(options::OPT_mcpu_EQ);
220  if (!A)
221  A = Args.getLastArg(options::OPT_march_EQ);
222 
223  if (!A)
224  return "";
225 
226  const char *name = A->getValue();
227  return llvm::StringSwitch<const char *>(name)
228  .Case("r1", "nios2r1")
229  .Case("r2", "nios2r2")
230  .Default(name);
231 }
232 
233 static std::string getLanaiTargetCPU(const ArgList &Args) {
234  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
235  return A->getValue();
236  }
237  return "";
238 }
239 
240 /// Get the (LLVM) name of the WebAssembly cpu we are targeting.
241 static StringRef getWebAssemblyTargetCPU(const ArgList &Args) {
242  // If we have -mcpu=, use that.
243  if (Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
244  StringRef CPU = A->getValue();
245 
246 #ifdef __wasm__
247  // Handle "native" by examining the host. "native" isn't meaningful when
248  // cross compiling, so only support this when the host is also WebAssembly.
249  if (CPU == "native")
250  return llvm::sys::getHostCPUName();
251 #endif
252 
253  return CPU;
254  }
255 
256  return "generic";
257 }
258 
259 std::string tools::getCPUName(const ArgList &Args, const llvm::Triple &T,
260  bool FromAs) {
261  Arg *A;
262 
263  switch (T.getArch()) {
264  default:
265  return "";
266 
267  case llvm::Triple::aarch64:
268  case llvm::Triple::aarch64_be:
269  return aarch64::getAArch64TargetCPU(Args, A);
270 
271  case llvm::Triple::arm:
272  case llvm::Triple::armeb:
273  case llvm::Triple::thumb:
274  case llvm::Triple::thumbeb: {
275  StringRef MArch, MCPU;
276  arm::getARMArchCPUFromArgs(Args, MArch, MCPU, FromAs);
277  return arm::getARMTargetCPU(MCPU, MArch, T);
278  }
279 
280  case llvm::Triple::avr:
281  if (const Arg *A = Args.getLastArg(options::OPT_mmcu_EQ))
282  return A->getValue();
283  return "";
284 
285  case llvm::Triple::nios2: {
286  return getNios2TargetCPU(Args);
287  }
288 
289  case llvm::Triple::mips:
290  case llvm::Triple::mipsel:
291  case llvm::Triple::mips64:
292  case llvm::Triple::mips64el: {
293  StringRef CPUName;
294  StringRef ABIName;
295  mips::getMipsCPUAndABI(Args, T, CPUName, ABIName);
296  return CPUName;
297  }
298 
299  case llvm::Triple::nvptx:
300  case llvm::Triple::nvptx64:
301  if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
302  return A->getValue();
303  return "";
304 
305  case llvm::Triple::ppc:
306  case llvm::Triple::ppc64:
307  case llvm::Triple::ppc64le: {
308  std::string TargetCPUName = ppc::getPPCTargetCPU(Args);
309  // LLVM may default to generating code for the native CPU,
310  // but, like gcc, we default to a more generic option for
311  // each architecture. (except on Darwin)
312  if (TargetCPUName.empty() && !T.isOSDarwin()) {
313  if (T.getArch() == llvm::Triple::ppc64)
314  TargetCPUName = "ppc64";
315  else if (T.getArch() == llvm::Triple::ppc64le)
316  TargetCPUName = "ppc64le";
317  else
318  TargetCPUName = "ppc";
319  }
320  return TargetCPUName;
321  }
322 
323  case llvm::Triple::bpfel:
324  case llvm::Triple::bpfeb:
325  case llvm::Triple::sparc:
326  case llvm::Triple::sparcel:
327  case llvm::Triple::sparcv9:
328  if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
329  return A->getValue();
330  return "";
331 
332  case llvm::Triple::x86:
333  case llvm::Triple::x86_64:
334  return x86::getX86TargetCPU(Args, T);
335 
336  case llvm::Triple::hexagon:
337  return "hexagon" +
339 
340  case llvm::Triple::lanai:
341  return getLanaiTargetCPU(Args);
342 
343  case llvm::Triple::systemz:
344  return systemz::getSystemZTargetCPU(Args);
345 
346  case llvm::Triple::r600:
347  case llvm::Triple::amdgcn:
348  return getR600TargetGPU(Args);
349 
350  case llvm::Triple::wasm32:
351  case llvm::Triple::wasm64:
352  return getWebAssemblyTargetCPU(Args);
353  }
354 }
355 
356 unsigned tools::getLTOParallelism(const ArgList &Args, const Driver &D) {
357  unsigned Parallelism = 0;
358  Arg *LtoJobsArg = Args.getLastArg(options::OPT_flto_jobs_EQ);
359  if (LtoJobsArg &&
360  StringRef(LtoJobsArg->getValue()).getAsInteger(10, Parallelism))
361  D.Diag(diag::err_drv_invalid_int_value) << LtoJobsArg->getAsString(Args)
362  << LtoJobsArg->getValue();
363  return Parallelism;
364 }
365 
366 // CloudABI and WebAssembly use -ffunction-sections and -fdata-sections by
367 // default.
368 bool tools::isUseSeparateSections(const llvm::Triple &Triple) {
369  return Triple.getOS() == llvm::Triple::CloudABI ||
370  Triple.getArch() == llvm::Triple::wasm32 ||
371  Triple.getArch() == llvm::Triple::wasm64;
372 }
373 
374 void tools::AddGoldPlugin(const ToolChain &ToolChain, const ArgList &Args,
375  ArgStringList &CmdArgs, bool IsThinLTO,
376  const Driver &D) {
377  // Tell the linker to load the plugin. This has to come before AddLinkerInputs
378  // as gold requires -plugin to come before any -plugin-opt that -Wl might
379  // forward.
380  CmdArgs.push_back("-plugin");
381 
382 #if defined(LLVM_ON_WIN32)
383  const char *Suffix = ".dll";
384 #elif defined(__APPLE__)
385  const char *Suffix = ".dylib";
386 #else
387  const char *Suffix = ".so";
388 #endif
389 
390  SmallString<1024> Plugin;
391  llvm::sys::path::native(Twine(ToolChain.getDriver().Dir) +
392  "/../lib" CLANG_LIBDIR_SUFFIX "/LLVMgold" +
393  Suffix,
394  Plugin);
395  CmdArgs.push_back(Args.MakeArgString(Plugin));
396 
397  // Try to pass driver level flags relevant to LTO code generation down to
398  // the plugin.
399 
400  // Handle flags for selecting CPU variants.
401  std::string CPU = getCPUName(Args, ToolChain.getTriple());
402  if (!CPU.empty())
403  CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=mcpu=") + CPU));
404 
405  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
406  StringRef OOpt;
407  if (A->getOption().matches(options::OPT_O4) ||
408  A->getOption().matches(options::OPT_Ofast))
409  OOpt = "3";
410  else if (A->getOption().matches(options::OPT_O))
411  OOpt = A->getValue();
412  else if (A->getOption().matches(options::OPT_O0))
413  OOpt = "0";
414  if (!OOpt.empty())
415  CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=O") + OOpt));
416  }
417 
418  if (IsThinLTO)
419  CmdArgs.push_back("-plugin-opt=thinlto");
420 
421  if (unsigned Parallelism = getLTOParallelism(Args, D))
422  CmdArgs.push_back(
423  Args.MakeArgString("-plugin-opt=jobs=" + Twine(Parallelism)));
424 
425  // If an explicit debugger tuning argument appeared, pass it along.
426  if (Arg *A = Args.getLastArg(options::OPT_gTune_Group,
427  options::OPT_ggdbN_Group)) {
428  if (A->getOption().matches(options::OPT_glldb))
429  CmdArgs.push_back("-plugin-opt=-debugger-tune=lldb");
430  else if (A->getOption().matches(options::OPT_gsce))
431  CmdArgs.push_back("-plugin-opt=-debugger-tune=sce");
432  else
433  CmdArgs.push_back("-plugin-opt=-debugger-tune=gdb");
434  }
435 
436  bool UseSeparateSections =
438 
439  if (Args.hasFlag(options::OPT_ffunction_sections,
440  options::OPT_fno_function_sections, UseSeparateSections)) {
441  CmdArgs.push_back("-plugin-opt=-function-sections");
442  }
443 
444  if (Args.hasFlag(options::OPT_fdata_sections, options::OPT_fno_data_sections,
445  UseSeparateSections)) {
446  CmdArgs.push_back("-plugin-opt=-data-sections");
447  }
448 
449  if (Arg *A = getLastProfileSampleUseArg(Args)) {
450  StringRef FName = A->getValue();
451  if (!llvm::sys::fs::exists(FName))
452  D.Diag(diag::err_drv_no_such_file) << FName;
453  else
454  CmdArgs.push_back(
455  Args.MakeArgString(Twine("-plugin-opt=sample-profile=") + FName));
456  }
457 
458  // Need this flag to turn on new pass manager via Gold plugin.
459  if (Args.hasFlag(options::OPT_fexperimental_new_pass_manager,
460  options::OPT_fno_experimental_new_pass_manager,
461  /* Default */ false)) {
462  CmdArgs.push_back("-plugin-opt=new-pass-manager");
463  }
464 
465 }
466 
467 void tools::addArchSpecificRPath(const ToolChain &TC, const ArgList &Args,
468  ArgStringList &CmdArgs) {
469  std::string CandidateRPath = TC.getArchSpecificLibPath();
470  if (TC.getVFS().exists(CandidateRPath)) {
471  CmdArgs.push_back("-rpath");
472  CmdArgs.push_back(Args.MakeArgString(CandidateRPath.c_str()));
473  }
474 }
475 
476 bool tools::addOpenMPRuntime(ArgStringList &CmdArgs, const ToolChain &TC,
477  const ArgList &Args, bool IsOffloadingHost,
478  bool GompNeedsRT) {
479  if (!Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
480  options::OPT_fno_openmp, false))
481  return false;
482 
483  switch (TC.getDriver().getOpenMPRuntime(Args)) {
484  case Driver::OMPRT_OMP:
485  CmdArgs.push_back("-lomp");
486  break;
487  case Driver::OMPRT_GOMP:
488  CmdArgs.push_back("-lgomp");
489 
490  if (GompNeedsRT)
491  CmdArgs.push_back("-lrt");
492  break;
493  case Driver::OMPRT_IOMP5:
494  CmdArgs.push_back("-liomp5");
495  break;
497  // Already diagnosed.
498  return false;
499  }
500 
501  if (IsOffloadingHost)
502  CmdArgs.push_back("-lomptarget");
503 
504  addArchSpecificRPath(TC, Args, CmdArgs);
505 
506  return true;
507 }
508 
509 static void addSanitizerRuntime(const ToolChain &TC, const ArgList &Args,
510  ArgStringList &CmdArgs, StringRef Sanitizer,
511  bool IsShared, bool IsWhole) {
512  // Wrap any static runtimes that must be forced into executable in
513  // whole-archive.
514  if (IsWhole) CmdArgs.push_back("-whole-archive");
515  CmdArgs.push_back(TC.getCompilerRTArgString(Args, Sanitizer, IsShared));
516  if (IsWhole) CmdArgs.push_back("-no-whole-archive");
517 
518  if (IsShared) {
519  addArchSpecificRPath(TC, Args, CmdArgs);
520  }
521 }
522 
523 // Tries to use a file with the list of dynamic symbols that need to be exported
524 // from the runtime library. Returns true if the file was found.
525 static bool addSanitizerDynamicList(const ToolChain &TC, const ArgList &Args,
526  ArgStringList &CmdArgs,
527  StringRef Sanitizer) {
528  SmallString<128> SanRT(TC.getCompilerRT(Args, Sanitizer));
529  if (llvm::sys::fs::exists(SanRT + ".syms")) {
530  CmdArgs.push_back(Args.MakeArgString("--dynamic-list=" + SanRT + ".syms"));
531  return true;
532  }
533  return false;
534 }
535 
536 void tools::linkSanitizerRuntimeDeps(const ToolChain &TC,
537  ArgStringList &CmdArgs) {
538  // Force linking against the system libraries sanitizers depends on
539  // (see PR15823 why this is necessary).
540  CmdArgs.push_back("--no-as-needed");
541  // There's no libpthread or librt on RTEMS.
542  if (TC.getTriple().getOS() != llvm::Triple::RTEMS) {
543  CmdArgs.push_back("-lpthread");
544  CmdArgs.push_back("-lrt");
545  }
546  CmdArgs.push_back("-lm");
547  // There's no libdl on all OSes.
548  if (TC.getTriple().getOS() != llvm::Triple::FreeBSD &&
549  TC.getTriple().getOS() != llvm::Triple::NetBSD &&
550  TC.getTriple().getOS() != llvm::Triple::RTEMS)
551  CmdArgs.push_back("-ldl");
552  // Required for forkpty on some OSes
553  if (TC.getTriple().getOS() == llvm::Triple::NetBSD)
554  CmdArgs.push_back("-lutil");
555  // Required for backtrace on some OSes
556  if (TC.getTriple().getOS() == llvm::Triple::NetBSD)
557  CmdArgs.push_back("-lexecinfo");
558 }
559 
560 static void
561 collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
562  SmallVectorImpl<StringRef> &SharedRuntimes,
563  SmallVectorImpl<StringRef> &StaticRuntimes,
564  SmallVectorImpl<StringRef> &NonWholeStaticRuntimes,
565  SmallVectorImpl<StringRef> &HelperStaticRuntimes,
566  SmallVectorImpl<StringRef> &RequiredSymbols) {
567  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
568  // Collect shared runtimes.
569  if (SanArgs.needsSharedRt()) {
570  if (SanArgs.needsAsanRt()) {
571  SharedRuntimes.push_back("asan");
572  if (!Args.hasArg(options::OPT_shared) && !TC.getTriple().isAndroid())
573  HelperStaticRuntimes.push_back("asan-preinit");
574  }
575  if (SanArgs.needsUbsanRt()) {
576  if (SanArgs.requiresMinimalRuntime()) {
577  SharedRuntimes.push_back("ubsan_minimal");
578  } else {
579  SharedRuntimes.push_back("ubsan_standalone");
580  }
581  }
582  if (SanArgs.needsScudoRt())
583  SharedRuntimes.push_back("scudo");
584  if (SanArgs.needsHwasanRt())
585  SharedRuntimes.push_back("hwasan");
586  }
587 
588  // The stats_client library is also statically linked into DSOs.
589  if (SanArgs.needsStatsRt())
590  StaticRuntimes.push_back("stats_client");
591 
592  // Collect static runtimes.
593  if (Args.hasArg(options::OPT_shared) || SanArgs.needsSharedRt()) {
594  // Don't link static runtimes into DSOs or if -shared-libasan.
595  return;
596  }
597  if (SanArgs.needsAsanRt()) {
598  StaticRuntimes.push_back("asan");
599  if (SanArgs.linkCXXRuntimes())
600  StaticRuntimes.push_back("asan_cxx");
601  }
602 
603  if (SanArgs.needsHwasanRt()) {
604  StaticRuntimes.push_back("hwasan");
605  if (SanArgs.linkCXXRuntimes())
606  StaticRuntimes.push_back("hwasan_cxx");
607  }
608  if (SanArgs.needsDfsanRt())
609  StaticRuntimes.push_back("dfsan");
610  if (SanArgs.needsLsanRt())
611  StaticRuntimes.push_back("lsan");
612  if (SanArgs.needsMsanRt()) {
613  StaticRuntimes.push_back("msan");
614  if (SanArgs.linkCXXRuntimes())
615  StaticRuntimes.push_back("msan_cxx");
616  }
617  if (SanArgs.needsTsanRt()) {
618  StaticRuntimes.push_back("tsan");
619  if (SanArgs.linkCXXRuntimes())
620  StaticRuntimes.push_back("tsan_cxx");
621  }
622  if (SanArgs.needsUbsanRt()) {
623  if (SanArgs.requiresMinimalRuntime()) {
624  StaticRuntimes.push_back("ubsan_minimal");
625  } else {
626  StaticRuntimes.push_back("ubsan_standalone");
627  if (SanArgs.linkCXXRuntimes())
628  StaticRuntimes.push_back("ubsan_standalone_cxx");
629  }
630  }
631  if (SanArgs.needsSafeStackRt()) {
632  NonWholeStaticRuntimes.push_back("safestack");
633  RequiredSymbols.push_back("__safestack_init");
634  }
635  if (SanArgs.needsCfiRt())
636  StaticRuntimes.push_back("cfi");
637  if (SanArgs.needsCfiDiagRt()) {
638  StaticRuntimes.push_back("cfi_diag");
639  if (SanArgs.linkCXXRuntimes())
640  StaticRuntimes.push_back("ubsan_standalone_cxx");
641  }
642  if (SanArgs.needsStatsRt()) {
643  NonWholeStaticRuntimes.push_back("stats");
644  RequiredSymbols.push_back("__sanitizer_stats_register");
645  }
646  if (SanArgs.needsEsanRt())
647  StaticRuntimes.push_back("esan");
648  if (SanArgs.needsScudoRt()) {
649  StaticRuntimes.push_back("scudo");
650  if (SanArgs.linkCXXRuntimes())
651  StaticRuntimes.push_back("scudo_cxx");
652  }
653 }
654 
655 // Should be called before we add system libraries (C++ ABI, libstdc++/libc++,
656 // C runtime, etc). Returns true if sanitizer system deps need to be linked in.
657 bool tools::addSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
658  ArgStringList &CmdArgs) {
659  SmallVector<StringRef, 4> SharedRuntimes, StaticRuntimes,
660  NonWholeStaticRuntimes, HelperStaticRuntimes, RequiredSymbols;
661  collectSanitizerRuntimes(TC, Args, SharedRuntimes, StaticRuntimes,
662  NonWholeStaticRuntimes, HelperStaticRuntimes,
663  RequiredSymbols);
664 
665  // Inject libfuzzer dependencies.
666  if (TC.getSanitizerArgs().needsFuzzer()
667  && !Args.hasArg(options::OPT_shared)) {
668 
669  addSanitizerRuntime(TC, Args, CmdArgs, "fuzzer", false, true);
670  if (!Args.hasArg(clang::driver::options::OPT_nostdlibxx))
671  TC.AddCXXStdlibLibArgs(Args, CmdArgs);
672  }
673 
674  for (auto RT : SharedRuntimes)
675  addSanitizerRuntime(TC, Args, CmdArgs, RT, true, false);
676  for (auto RT : HelperStaticRuntimes)
677  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
678  bool AddExportDynamic = false;
679  for (auto RT : StaticRuntimes) {
680  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
681  AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
682  }
683  for (auto RT : NonWholeStaticRuntimes) {
684  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, false);
685  AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
686  }
687  for (auto S : RequiredSymbols) {
688  CmdArgs.push_back("-u");
689  CmdArgs.push_back(Args.MakeArgString(S));
690  }
691  // If there is a static runtime with no dynamic list, force all the symbols
692  // to be dynamic to be sure we export sanitizer interface functions.
693  if (AddExportDynamic)
694  CmdArgs.push_back("-export-dynamic");
695 
696  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
697  if (SanArgs.hasCrossDsoCfi() && !AddExportDynamic)
698  CmdArgs.push_back("-export-dynamic-symbol=__cfi_check");
699 
700  return !StaticRuntimes.empty() || !NonWholeStaticRuntimes.empty();
701 }
702 
703 bool tools::areOptimizationsEnabled(const ArgList &Args) {
704  // Find the last -O arg and see if it is non-zero.
705  if (Arg *A = Args.getLastArg(options::OPT_O_Group))
706  return !A->getOption().matches(options::OPT_O0);
707  // Defaults to -O0.
708  return false;
709 }
710 
711 const char *tools::SplitDebugName(const ArgList &Args, const InputInfo &Input) {
712  Arg *FinalOutput = Args.getLastArg(options::OPT_o);
713  if (FinalOutput && Args.hasArg(options::OPT_c)) {
714  SmallString<128> T(FinalOutput->getValue());
715  llvm::sys::path::replace_extension(T, "dwo");
716  return Args.MakeArgString(T);
717  } else {
718  // Use the compilation dir.
720  Args.getLastArgValue(options::OPT_fdebug_compilation_dir));
721  SmallString<128> F(llvm::sys::path::stem(Input.getBaseInput()));
722  llvm::sys::path::replace_extension(F, "dwo");
723  T += F;
724  return Args.MakeArgString(F);
725  }
726 }
727 
728 void tools::SplitDebugInfo(const ToolChain &TC, Compilation &C, const Tool &T,
729  const JobAction &JA, const ArgList &Args,
730  const InputInfo &Output, const char *OutFile) {
731  ArgStringList ExtractArgs;
732  ExtractArgs.push_back("--extract-dwo");
733 
734  ArgStringList StripArgs;
735  StripArgs.push_back("--strip-dwo");
736 
737  // Grabbing the output of the earlier compile step.
738  StripArgs.push_back(Output.getFilename());
739  ExtractArgs.push_back(Output.getFilename());
740  ExtractArgs.push_back(OutFile);
741 
742  const char *Exec =
743  Args.MakeArgString(TC.GetProgramPath(CLANG_DEFAULT_OBJCOPY));
744  InputInfo II(types::TY_Object, Output.getFilename(), Output.getFilename());
745 
746  // First extract the dwo sections.
747  C.addCommand(llvm::make_unique<Command>(JA, T, Exec, ExtractArgs, II));
748 
749  // Then remove them from the original .o file.
750  C.addCommand(llvm::make_unique<Command>(JA, T, Exec, StripArgs, II));
751 }
752 
753 // Claim options we don't want to warn if they are unused. We do this for
754 // options that build systems might add but are unused when assembling or only
755 // running the preprocessor for example.
756 void tools::claimNoWarnArgs(const ArgList &Args) {
757  // Don't warn about unused -f(no-)?lto. This can happen when we're
758  // preprocessing, precompiling or assembling.
759  Args.ClaimAllArgs(options::OPT_flto_EQ);
760  Args.ClaimAllArgs(options::OPT_flto);
761  Args.ClaimAllArgs(options::OPT_fno_lto);
762 }
763 
764 Arg *tools::getLastProfileUseArg(const ArgList &Args) {
765  auto *ProfileUseArg = Args.getLastArg(
766  options::OPT_fprofile_instr_use, options::OPT_fprofile_instr_use_EQ,
767  options::OPT_fprofile_use, options::OPT_fprofile_use_EQ,
768  options::OPT_fno_profile_instr_use);
769 
770  if (ProfileUseArg &&
771  ProfileUseArg->getOption().matches(options::OPT_fno_profile_instr_use))
772  ProfileUseArg = nullptr;
773 
774  return ProfileUseArg;
775 }
776 
777 Arg *tools::getLastProfileSampleUseArg(const ArgList &Args) {
778  auto *ProfileSampleUseArg = Args.getLastArg(
779  options::OPT_fprofile_sample_use, options::OPT_fprofile_sample_use_EQ,
780  options::OPT_fauto_profile, options::OPT_fauto_profile_EQ,
781  options::OPT_fno_profile_sample_use, options::OPT_fno_auto_profile);
782 
783  if (ProfileSampleUseArg &&
784  (ProfileSampleUseArg->getOption().matches(
785  options::OPT_fno_profile_sample_use) ||
786  ProfileSampleUseArg->getOption().matches(options::OPT_fno_auto_profile)))
787  return nullptr;
788 
789  return Args.getLastArg(options::OPT_fprofile_sample_use_EQ,
790  options::OPT_fauto_profile_EQ);
791 }
792 
793 /// Parses the various -fpic/-fPIC/-fpie/-fPIE arguments. Then,
794 /// smooshes them together with platform defaults, to decide whether
795 /// this compile should be using PIC mode or not. Returns a tuple of
796 /// (RelocationModel, PICLevel, IsPIE).
797 std::tuple<llvm::Reloc::Model, unsigned, bool>
798 tools::ParsePICArgs(const ToolChain &ToolChain, const ArgList &Args) {
799  const llvm::Triple &EffectiveTriple = ToolChain.getEffectiveTriple();
800  const llvm::Triple &Triple = ToolChain.getTriple();
801 
802  bool PIE = ToolChain.isPIEDefault();
803  bool PIC = PIE || ToolChain.isPICDefault();
804  // The Darwin/MachO default to use PIC does not apply when using -static.
805  if (Triple.isOSBinFormatMachO() && Args.hasArg(options::OPT_static))
806  PIE = PIC = false;
807  bool IsPICLevelTwo = PIC;
808 
809  bool KernelOrKext =
810  Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
811 
812  // Android-specific defaults for PIC/PIE
813  if (Triple.isAndroid()) {
814  switch (Triple.getArch()) {
815  case llvm::Triple::arm:
816  case llvm::Triple::armeb:
817  case llvm::Triple::thumb:
818  case llvm::Triple::thumbeb:
819  case llvm::Triple::aarch64:
820  case llvm::Triple::mips:
821  case llvm::Triple::mipsel:
822  case llvm::Triple::mips64:
823  case llvm::Triple::mips64el:
824  PIC = true; // "-fpic"
825  break;
826 
827  case llvm::Triple::x86:
828  case llvm::Triple::x86_64:
829  PIC = true; // "-fPIC"
830  IsPICLevelTwo = true;
831  break;
832 
833  default:
834  break;
835  }
836  }
837 
838  // OpenBSD-specific defaults for PIE
839  if (Triple.getOS() == llvm::Triple::OpenBSD) {
840  switch (ToolChain.getArch()) {
841  case llvm::Triple::arm:
842  case llvm::Triple::aarch64:
843  case llvm::Triple::mips64:
844  case llvm::Triple::mips64el:
845  case llvm::Triple::x86:
846  case llvm::Triple::x86_64:
847  IsPICLevelTwo = false; // "-fpie"
848  break;
849 
850  case llvm::Triple::ppc:
851  case llvm::Triple::sparc:
852  case llvm::Triple::sparcel:
853  case llvm::Triple::sparcv9:
854  IsPICLevelTwo = true; // "-fPIE"
855  break;
856 
857  default:
858  break;
859  }
860  }
861 
862  // The last argument relating to either PIC or PIE wins, and no
863  // other argument is used. If the last argument is any flavor of the
864  // '-fno-...' arguments, both PIC and PIE are disabled. Any PIE
865  // option implicitly enables PIC at the same level.
866  Arg *LastPICArg = Args.getLastArg(options::OPT_fPIC, options::OPT_fno_PIC,
867  options::OPT_fpic, options::OPT_fno_pic,
868  options::OPT_fPIE, options::OPT_fno_PIE,
869  options::OPT_fpie, options::OPT_fno_pie);
870  if (Triple.isOSWindows() && LastPICArg &&
871  LastPICArg ==
872  Args.getLastArg(options::OPT_fPIC, options::OPT_fpic,
873  options::OPT_fPIE, options::OPT_fpie)) {
874  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
875  << LastPICArg->getSpelling() << Triple.str();
876  if (Triple.getArch() == llvm::Triple::x86_64)
877  return std::make_tuple(llvm::Reloc::PIC_, 2U, false);
878  return std::make_tuple(llvm::Reloc::Static, 0U, false);
879  }
880 
881  // Check whether the tool chain trumps the PIC-ness decision. If the PIC-ness
882  // is forced, then neither PIC nor PIE flags will have no effect.
883  if (!ToolChain.isPICDefaultForced()) {
884  if (LastPICArg) {
885  Option O = LastPICArg->getOption();
886  if (O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic) ||
887  O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie)) {
888  PIE = O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie);
889  PIC =
890  PIE || O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic);
891  IsPICLevelTwo =
892  O.matches(options::OPT_fPIE) || O.matches(options::OPT_fPIC);
893  } else {
894  PIE = PIC = false;
895  if (EffectiveTriple.isPS4CPU()) {
896  Arg *ModelArg = Args.getLastArg(options::OPT_mcmodel_EQ);
897  StringRef Model = ModelArg ? ModelArg->getValue() : "";
898  if (Model != "kernel") {
899  PIC = true;
900  ToolChain.getDriver().Diag(diag::warn_drv_ps4_force_pic)
901  << LastPICArg->getSpelling();
902  }
903  }
904  }
905  }
906  }
907 
908  // Introduce a Darwin and PS4-specific hack. If the default is PIC, but the
909  // PIC level would've been set to level 1, force it back to level 2 PIC
910  // instead.
911  if (PIC && (Triple.isOSDarwin() || EffectiveTriple.isPS4CPU()))
912  IsPICLevelTwo |= ToolChain.isPICDefault();
913 
914  // This kernel flags are a trump-card: they will disable PIC/PIE
915  // generation, independent of the argument order.
916  if (KernelOrKext &&
917  ((!EffectiveTriple.isiOS() || EffectiveTriple.isOSVersionLT(6)) &&
918  !EffectiveTriple.isWatchOS()))
919  PIC = PIE = false;
920 
921  if (Arg *A = Args.getLastArg(options::OPT_mdynamic_no_pic)) {
922  // This is a very special mode. It trumps the other modes, almost no one
923  // uses it, and it isn't even valid on any OS but Darwin.
924  if (!Triple.isOSDarwin())
925  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
926  << A->getSpelling() << Triple.str();
927 
928  // FIXME: Warn when this flag trumps some other PIC or PIE flag.
929 
930  // Only a forced PIC mode can cause the actual compile to have PIC defines
931  // etc., no flags are sufficient. This behavior was selected to closely
932  // match that of llvm-gcc and Apple GCC before that.
933  PIC = ToolChain.isPICDefault() && ToolChain.isPICDefaultForced();
934 
935  return std::make_tuple(llvm::Reloc::DynamicNoPIC, PIC ? 2U : 0U, false);
936  }
937 
938  bool EmbeddedPISupported;
939  switch (Triple.getArch()) {
940  case llvm::Triple::arm:
941  case llvm::Triple::armeb:
942  case llvm::Triple::thumb:
943  case llvm::Triple::thumbeb:
944  EmbeddedPISupported = true;
945  break;
946  default:
947  EmbeddedPISupported = false;
948  break;
949  }
950 
951  bool ROPI = false, RWPI = false;
952  Arg* LastROPIArg = Args.getLastArg(options::OPT_fropi, options::OPT_fno_ropi);
953  if (LastROPIArg && LastROPIArg->getOption().matches(options::OPT_fropi)) {
954  if (!EmbeddedPISupported)
955  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
956  << LastROPIArg->getSpelling() << Triple.str();
957  ROPI = true;
958  }
959  Arg *LastRWPIArg = Args.getLastArg(options::OPT_frwpi, options::OPT_fno_rwpi);
960  if (LastRWPIArg && LastRWPIArg->getOption().matches(options::OPT_frwpi)) {
961  if (!EmbeddedPISupported)
962  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
963  << LastRWPIArg->getSpelling() << Triple.str();
964  RWPI = true;
965  }
966 
967  // ROPI and RWPI are not comaptible with PIC or PIE.
968  if ((ROPI || RWPI) && (PIC || PIE))
969  ToolChain.getDriver().Diag(diag::err_drv_ropi_rwpi_incompatible_with_pic);
970 
971  // When targettng MIPS64 with N64, the default is PIC, unless -mno-abicalls is
972  // used.
973  if ((Triple.getArch() == llvm::Triple::mips64 ||
974  Triple.getArch() == llvm::Triple::mips64el) &&
975  Args.hasArg(options::OPT_mno_abicalls))
976  return std::make_tuple(llvm::Reloc::Static, 0U, false);
977 
978  if (PIC)
979  return std::make_tuple(llvm::Reloc::PIC_, IsPICLevelTwo ? 2U : 1U, PIE);
980 
981  llvm::Reloc::Model RelocM = llvm::Reloc::Static;
982  if (ROPI && RWPI)
983  RelocM = llvm::Reloc::ROPI_RWPI;
984  else if (ROPI)
985  RelocM = llvm::Reloc::ROPI;
986  else if (RWPI)
987  RelocM = llvm::Reloc::RWPI;
988 
989  return std::make_tuple(RelocM, 0U, false);
990 }
991 
992 void tools::AddAssemblerKPIC(const ToolChain &ToolChain, const ArgList &Args,
993  ArgStringList &CmdArgs) {
994  llvm::Reloc::Model RelocationModel;
995  unsigned PICLevel;
996  bool IsPIE;
997  std::tie(RelocationModel, PICLevel, IsPIE) = ParsePICArgs(ToolChain, Args);
998 
999  if (RelocationModel != llvm::Reloc::Static)
1000  CmdArgs.push_back("-KPIC");
1001 }
1002 
1003 /// \brief Determine whether Objective-C automated reference counting is
1004 /// enabled.
1005 bool tools::isObjCAutoRefCount(const ArgList &Args) {
1006  return Args.hasFlag(options::OPT_fobjc_arc, options::OPT_fno_objc_arc, false);
1007 }
1008 
1009 static void AddLibgcc(const llvm::Triple &Triple, const Driver &D,
1010  ArgStringList &CmdArgs, const ArgList &Args) {
1011  bool isAndroid = Triple.isAndroid();
1012  bool isCygMing = Triple.isOSCygMing();
1013  bool IsIAMCU = Triple.isOSIAMCU();
1014  bool StaticLibgcc = Args.hasArg(options::OPT_static_libgcc) ||
1015  Args.hasArg(options::OPT_static);
1016  if (!D.CCCIsCXX())
1017  CmdArgs.push_back("-lgcc");
1018 
1019  if (StaticLibgcc || isAndroid) {
1020  if (D.CCCIsCXX())
1021  CmdArgs.push_back("-lgcc");
1022  } else {
1023  if (!D.CCCIsCXX() && !isCygMing)
1024  CmdArgs.push_back("--as-needed");
1025  CmdArgs.push_back("-lgcc_s");
1026  if (!D.CCCIsCXX() && !isCygMing)
1027  CmdArgs.push_back("--no-as-needed");
1028  }
1029 
1030  if (StaticLibgcc && !isAndroid && !IsIAMCU)
1031  CmdArgs.push_back("-lgcc_eh");
1032  else if (!Args.hasArg(options::OPT_shared) && D.CCCIsCXX())
1033  CmdArgs.push_back("-lgcc");
1034 
1035  // According to Android ABI, we have to link with libdl if we are
1036  // linking with non-static libgcc.
1037  //
1038  // NOTE: This fixes a link error on Android MIPS as well. The non-static
1039  // libgcc for MIPS relies on _Unwind_Find_FDE and dl_iterate_phdr from libdl.
1040  if (isAndroid && !StaticLibgcc)
1041  CmdArgs.push_back("-ldl");
1042 }
1043 
1044 void tools::AddRunTimeLibs(const ToolChain &TC, const Driver &D,
1045  ArgStringList &CmdArgs, const ArgList &Args) {
1046  // Make use of compiler-rt if --rtlib option is used
1048 
1049  switch (RLT) {
1051  CmdArgs.push_back(TC.getCompilerRTArgString(Args, "builtins"));
1052  break;
1053  case ToolChain::RLT_Libgcc:
1054  // Make sure libgcc is not used under MSVC environment by default
1055  if (TC.getTriple().isKnownWindowsMSVCEnvironment()) {
1056  // Issue error diagnostic if libgcc is explicitly specified
1057  // through command line as --rtlib option argument.
1058  if (Args.hasArg(options::OPT_rtlib_EQ)) {
1059  TC.getDriver().Diag(diag::err_drv_unsupported_rtlib_for_platform)
1060  << Args.getLastArg(options::OPT_rtlib_EQ)->getValue() << "MSVC";
1061  }
1062  } else
1063  AddLibgcc(TC.getTriple(), D, CmdArgs, Args);
1064  break;
1065  }
1066 }
1067 
1068 /// Add OpenMP linker script arguments at the end of the argument list so that
1069 /// the fat binary is built by embedding each of the device images into the
1070 /// host. The linker script also defines a few symbols required by the code
1071 /// generation so that the images can be easily retrieved at runtime by the
1072 /// offloading library. This should be used only in tool chains that support
1073 /// linker scripts.
1074 void tools::AddOpenMPLinkerScript(const ToolChain &TC, Compilation &C,
1075  const InputInfo &Output,
1076  const InputInfoList &Inputs,
1077  const ArgList &Args, ArgStringList &CmdArgs,
1078  const JobAction &JA) {
1079 
1080  // If this is not an OpenMP host toolchain, we don't need to do anything.
1082  return;
1083 
1084  // Create temporary linker script. Keep it if save-temps is enabled.
1085  const char *LKS;
1086  SmallString<256> Name = llvm::sys::path::filename(Output.getFilename());
1087  if (C.getDriver().isSaveTempsEnabled()) {
1088  llvm::sys::path::replace_extension(Name, "lk");
1089  LKS = C.getArgs().MakeArgString(Name.c_str());
1090  } else {
1091  llvm::sys::path::replace_extension(Name, "");
1092  Name = C.getDriver().GetTemporaryPath(Name, "lk");
1093  LKS = C.addTempFile(C.getArgs().MakeArgString(Name.c_str()));
1094  }
1095 
1096  // Add linker script option to the command.
1097  CmdArgs.push_back("-T");
1098  CmdArgs.push_back(LKS);
1099 
1100  // Create a buffer to write the contents of the linker script.
1101  std::string LksBuffer;
1102  llvm::raw_string_ostream LksStream(LksBuffer);
1103 
1104  // Get the OpenMP offload tool chains so that we can extract the triple
1105  // associated with each device input.
1106  auto OpenMPToolChains = C.getOffloadToolChains<Action::OFK_OpenMP>();
1107  assert(OpenMPToolChains.first != OpenMPToolChains.second &&
1108  "No OpenMP toolchains??");
1109 
1110  // Track the input file name and device triple in order to build the script,
1111  // inserting binaries in the designated sections.
1113 
1114  // Add commands to embed target binaries. We ensure that each section and
1115  // image is 16-byte aligned. This is not mandatory, but increases the
1116  // likelihood of data to be aligned with a cache block in several main host
1117  // machines.
1118  LksStream << "/*\n";
1119  LksStream << " OpenMP Offload Linker Script\n";
1120  LksStream << " *** Automatically generated by Clang ***\n";
1121  LksStream << "*/\n";
1122  LksStream << "TARGET(binary)\n";
1123  auto DTC = OpenMPToolChains.first;
1124  for (auto &II : Inputs) {
1125  const Action *A = II.getAction();
1126  // Is this a device linking action?
1127  if (A && isa<LinkJobAction>(A) &&
1129  assert(DTC != OpenMPToolChains.second &&
1130  "More device inputs than device toolchains??");
1131  InputBinaryInfo.push_back(std::make_pair(
1132  DTC->second->getTriple().normalize(), II.getFilename()));
1133  ++DTC;
1134  LksStream << "INPUT(" << II.getFilename() << ")\n";
1135  }
1136  }
1137 
1138  assert(DTC == OpenMPToolChains.second &&
1139  "Less device inputs than device toolchains??");
1140 
1141  LksStream << "SECTIONS\n";
1142  LksStream << "{\n";
1143 
1144  // Put each target binary into a separate section.
1145  for (const auto &BI : InputBinaryInfo) {
1146  LksStream << " .omp_offloading." << BI.first << " :\n";
1147  LksStream << " ALIGN(0x10)\n";
1148  LksStream << " {\n";
1149  LksStream << " PROVIDE_HIDDEN(.omp_offloading.img_start." << BI.first
1150  << " = .);\n";
1151  LksStream << " " << BI.second << "\n";
1152  LksStream << " PROVIDE_HIDDEN(.omp_offloading.img_end." << BI.first
1153  << " = .);\n";
1154  LksStream << " }\n";
1155  }
1156 
1157  // Add commands to define host entries begin and end. We use 1-byte subalign
1158  // so that the linker does not add any padding and the elements in this
1159  // section form an array.
1160  LksStream << " .omp_offloading.entries :\n";
1161  LksStream << " ALIGN(0x10)\n";
1162  LksStream << " SUBALIGN(0x01)\n";
1163  LksStream << " {\n";
1164  LksStream << " PROVIDE_HIDDEN(.omp_offloading.entries_begin = .);\n";
1165  LksStream << " *(.omp_offloading.entries)\n";
1166  LksStream << " PROVIDE_HIDDEN(.omp_offloading.entries_end = .);\n";
1167  LksStream << " }\n";
1168  LksStream << "}\n";
1169  LksStream << "INSERT BEFORE .data\n";
1170  LksStream.flush();
1171 
1172  // Dump the contents of the linker script if the user requested that. We
1173  // support this option to enable testing of behavior with -###.
1174  if (C.getArgs().hasArg(options::OPT_fopenmp_dump_offload_linker_script))
1175  llvm::errs() << LksBuffer;
1176 
1177  // If this is a dry run, do not create the linker script file.
1178  if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
1179  return;
1180 
1181  // Open script file and write the contents.
1182  std::error_code EC;
1183  llvm::raw_fd_ostream Lksf(LKS, EC, llvm::sys::fs::F_None);
1184 
1185  if (EC) {
1186  C.getDriver().Diag(clang::diag::err_unable_to_make_temp) << EC.message();
1187  return;
1188  }
1189 
1190  Lksf << LksBuffer;
1191 }
void handleTargetFeaturesGroup(const llvm::opt::ArgList &Args, std::vector< StringRef > &Features, llvm::opt::OptSpecifier Group)
SmallVector< std::string, 16 > path_list
Definition: ToolChain.h:75
const char * getSystemZTargetCPU(const llvm::opt::ArgList &Args)
OpenMPRuntimeKind getOpenMPRuntime(const llvm::opt::ArgList &Args) const
Compute the desired OpenMP runtime from the flags provided.
Definition: Driver.cpp:492
virtual void AddCCKextLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddCCKextLibArgs - Add the system specific linker arguments to use for kernel extensions (Darwin-spec...
Definition: ToolChain.cpp:747
std::string GetTemporaryPath(StringRef Prefix, StringRef Suffix) const
GetTemporaryPath - Return the pathname of a temporary file to use as part of compilation; the file wi...
Definition: Driver.cpp:4031
const char * getCompilerRTArgString(const llvm::opt::ArgList &Args, StringRef Component, bool Shared=false) const
Definition: ToolChain.cpp:355
bool isUseSeparateSections(const llvm::Triple &Triple)
Definition: CommonArgs.cpp:368
Defines types useful for describing an Objective-C runtime.
void AddRunTimeLibs(const ToolChain &TC, const Driver &D, llvm::opt::ArgStringList &CmdArgs, const llvm::opt::ArgList &Args)
bool isHostOffloading(OffloadKind OKind) const
Check if this action have any offload kinds.
Definition: Action.h:187
DiagnosticBuilder Diag(unsigned DiagID) const
Definition: Driver.h:110
void AddTargetFeature(const llvm::opt::ArgList &Args, std::vector< StringRef > &Features, llvm::opt::OptSpecifier OnOpt, llvm::opt::OptSpecifier OffOpt, StringRef FeatureName)
virtual bool isPICDefaultForced() const =0
Tests whether this toolchain forces its default for PIC, PIE or non-PIC.
static void addSanitizerRuntime(const ToolChain &TC, const ArgList &Args, ArgStringList &CmdArgs, StringRef Sanitizer, bool IsShared, bool IsWhole)
Definition: CommonArgs.cpp:509
static void AddLibgcc(const llvm::Triple &Triple, const Driver &D, ArgStringList &CmdArgs, const ArgList &Args)
std::string getCPUName(const llvm::opt::ArgList &Args, const llvm::Triple &T, bool FromAs=false)
const char * getFilename() const
Definition: InputInfo.h:84
void linkSanitizerRuntimeDeps(const ToolChain &TC, llvm::opt::ArgStringList &CmdArgs)
std::string Dir
The path the driver executable was in, as invoked from the command line.
Definition: Driver.h:121
std::string getAArch64TargetCPU(const llvm::opt::ArgList &Args, llvm::opt::Arg *&A)
bool addSanitizerRuntimes(const ToolChain &TC, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs)
static bool addSanitizerDynamicList(const ToolChain &TC, const ArgList &Args, ArgStringList &CmdArgs, StringRef Sanitizer)
Definition: CommonArgs.cpp:525
Action - Represent an abstract compilation step to perform.
Definition: Action.h:45
std::string getTripleString() const
Definition: ToolChain.h:192
static std::string getNios2TargetCPU(const ArgList &Args)
Definition: CommonArgs.cpp:218
InputInfo - Wrapper for information about an input source.
Definition: InputInfo.h:23
void addArchSpecificRPath(const ToolChain &TC, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs)
vfs::FileSystem & getVFS() const
Definition: ToolChain.cpp:93
void AddGoldPlugin(const ToolChain &ToolChain, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, bool IsThinLTO, const Driver &D)
bool isDeviceOffloading(OffloadKind OKind) const
Definition: Action.h:190
The LLVM OpenMP runtime.
Definition: Driver.h:96
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:59
An unknown OpenMP runtime.
Definition: Driver.h:92
bool addOpenMPRuntime(llvm::opt::ArgStringList &CmdArgs, const ToolChain &TC, const llvm::opt::ArgList &Args, bool IsOffloadingHost=false, bool GompNeedsRT=false)
Returns true, if an OpenMP runtime has been added.
void AddOpenMPLinkerScript(const ToolChain &TC, Compilation &C, const InputInfo &Output, const InputInfoList &Inputs, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const JobAction &JA)
void addDirectoryList(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const char *ArgName, const char *EnvVar)
bool requiresMinimalRuntime() const
Definition: SanitizerArgs.h:68
Defines the clang::LangOptions interface.
static StringRef getWebAssemblyTargetCPU(const ArgList &Args)
Get the (LLVM) name of the WebAssembly cpu we are targeting.
Definition: CommonArgs.cpp:241
virtual bool isPICDefault() const =0
Test whether this toolchain defaults to PIC.
const FunctionProtoType * T
const llvm::Triple & getEffectiveTriple() const
Get the toolchain&#39;s effective clang triple.
Definition: ToolChain.h:197
Defines version macros and version-related utility functions for Clang.
static const StringRef GetTargetCPUVersion(const llvm::opt::ArgList &Args)
Definition: Hexagon.cpp:574
const char * SplitDebugName(const llvm::opt::ArgList &Args, const InputInfo &Input)
void addCommand(std::unique_ptr< Command > C)
Definition: Compilation.h:189
virtual std::string getCompilerRT(const llvm::opt::ArgList &Args, StringRef Component, bool Shared=false) const
Definition: ToolChain.cpp:337
std::tuple< llvm::Reloc::Model, unsigned, bool > ParsePICArgs(const ToolChain &ToolChain, const llvm::opt::ArgList &Args)
bool isObjCAutoRefCount(const llvm::opt::ArgList &Args)
const char * getX86TargetCPU(const llvm::opt::ArgList &Args, const llvm::Triple &Triple)
const_offload_toolchains_range getOffloadToolChains() const
Definition: Compilation.h:134
void AddAssemblerKPIC(const ToolChain &ToolChain, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs)
llvm::Triple::ArchType getArch() const
Definition: ToolChain.h:183
const llvm::opt::DerivedArgList & getArgs() const
Definition: Compilation.h:170
vfs::FileSystem & getVFS() const
Definition: Driver.h:301
const Driver & getDriver() const
Definition: ToolChain.h:167
std::string getPPCTargetCPU(const llvm::opt::ArgList &Args)
The legacy name for the LLVM OpenMP runtime from when it was the Intel OpenMP runtime.
Definition: Driver.h:106
bool CCCIsCXX() const
Whether the driver should follow g++ like behavior.
Definition: Driver.h:174
bool isSaveTempsEnabled() const
Definition: Driver.h:327
llvm::opt::Arg * getLastProfileSampleUseArg(const llvm::opt::ArgList &Args)
virtual bool HasNativeLLVMSupport() const
HasNativeLTOLinker - Check whether the linker and related tools have native LLVM support.
Definition: ToolChain.cpp:435
llvm::opt::Arg * getLastProfileUseArg(const llvm::opt::ArgList &Args)
void SplitDebugInfo(const ToolChain &TC, Compilation &C, const Tool &T, const JobAction &JA, const llvm::opt::ArgList &Args, const InputInfo &Output, const char *OutFile)
virtual RuntimeLibType GetRuntimeLibType(const llvm::opt::ArgList &Args) const
Definition: ToolChain.cpp:626
std::string getARMTargetCPU(StringRef CPU, llvm::StringRef Arch, const llvm::Triple &Triple)
Dataflow Directional Tag Classes.
void AddLinkerInputs(const ToolChain &TC, const InputInfoList &Inputs, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const JobAction &JA)
unsigned getLTOParallelism(const llvm::opt::ArgList &Args, const Driver &D)
Tool - Information on a specific compilation tool.
Definition: Tool.h:34
Defines the virtual file system interface vfs::FileSystem.
The GNU OpenMP runtime.
Definition: Driver.h:101
const SanitizerArgs & getSanitizerArgs() const
Definition: ToolChain.cpp:105
void getARMArchCPUFromArgs(const llvm::opt::ArgList &Args, llvm::StringRef &Arch, llvm::StringRef &CPU, bool FromAs=false)
bool areOptimizationsEnabled(const llvm::opt::ArgList &Args)
static std::string getLanaiTargetCPU(const ArgList &Args)
Definition: CommonArgs.cpp:233
void claimNoWarnArgs(const llvm::opt::ArgList &Args)
bool exists(const Twine &Path)
Check whether a file exists. Provided for convenience.
virtual bool isPIEDefault() const =0
Test whether this toolchain defaults to PIE.
Compilation - A set of tasks to perform for a single driver invocation.
Definition: Compilation.h:34
const Driver & getDriver() const
Definition: Compilation.h:117
const llvm::Triple & getTriple() const
Definition: ToolChain.h:169
std::string getArchSpecificLibPath() const
Definition: ToolChain.cpp:361
std::string GetProgramPath(const char *Name) const
Definition: ToolChain.cpp:395
const char * getBaseInput() const
Definition: InputInfo.h:79
static std::string getR600TargetGPU(const ArgList &Args)
Get the (LLVM) name of the R600 gpu we are targeting.
Definition: CommonArgs.cpp:202
void addPathIfExists(const Driver &D, const Twine &Path, ToolChain::path_list &Paths)
Definition: CommonArgs.cpp:59
virtual bool isCrossCompiling() const
Returns true if the toolchain is targeting a non-native architecture.
Definition: ToolChain.cpp:439
const char * addTempFile(const char *Name)
addTempFile - Add a file to remove on exit, and returns its argument.
Definition: Compilation.h:216
void getMipsCPUAndABI(const llvm::opt::ArgList &Args, const llvm::Triple &Triple, StringRef &CPUName, StringRef &ABIName)
bool isLLVMIR(ID Id)
Is this LLVM IR.
Definition: Types.cpp:148
static void collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args, SmallVectorImpl< StringRef > &SharedRuntimes, SmallVectorImpl< StringRef > &StaticRuntimes, SmallVectorImpl< StringRef > &NonWholeStaticRuntimes, SmallVectorImpl< StringRef > &HelperStaticRuntimes, SmallVectorImpl< StringRef > &RequiredSymbols)
Definition: CommonArgs.cpp:561
virtual void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddCXXStdlibLibArgs - Add the system specific linker arguments to use for the given C++ standard libr...
Definition: ToolChain.cpp:723
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:73