clang  6.0.0svn
CommonArgs.cpp
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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(Args.MakeArgString(Twine("-plugin-opt=jobs=") +
423  llvm::to_string(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 }
553 
554 static void
555 collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
556  SmallVectorImpl<StringRef> &SharedRuntimes,
557  SmallVectorImpl<StringRef> &StaticRuntimes,
558  SmallVectorImpl<StringRef> &NonWholeStaticRuntimes,
559  SmallVectorImpl<StringRef> &HelperStaticRuntimes,
560  SmallVectorImpl<StringRef> &RequiredSymbols) {
561  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
562  // Collect shared runtimes.
563  if (SanArgs.needsSharedRt()) {
564  if (SanArgs.needsAsanRt()) {
565  SharedRuntimes.push_back("asan");
566  if (!Args.hasArg(options::OPT_shared) && !TC.getTriple().isAndroid())
567  HelperStaticRuntimes.push_back("asan-preinit");
568  }
569  if (SanArgs.needsUbsanRt()) {
570  if (SanArgs.requiresMinimalRuntime()) {
571  SharedRuntimes.push_back("ubsan_minimal");
572  } else {
573  SharedRuntimes.push_back("ubsan_standalone");
574  }
575  }
576  if (SanArgs.needsScudoRt())
577  SharedRuntimes.push_back("scudo");
578  if (SanArgs.needsHwasanRt())
579  SharedRuntimes.push_back("hwasan");
580  }
581 
582  // The stats_client library is also statically linked into DSOs.
583  if (SanArgs.needsStatsRt())
584  StaticRuntimes.push_back("stats_client");
585 
586  // Collect static runtimes.
587  if (Args.hasArg(options::OPT_shared) || SanArgs.needsSharedRt()) {
588  // Don't link static runtimes into DSOs or if -shared-libasan.
589  return;
590  }
591  if (SanArgs.needsAsanRt()) {
592  StaticRuntimes.push_back("asan");
593  if (SanArgs.linkCXXRuntimes())
594  StaticRuntimes.push_back("asan_cxx");
595  }
596 
597  if (SanArgs.needsHwasanRt()) {
598  StaticRuntimes.push_back("hwasan");
599  if (SanArgs.linkCXXRuntimes())
600  StaticRuntimes.push_back("hwasan_cxx");
601  }
602  if (SanArgs.needsDfsanRt())
603  StaticRuntimes.push_back("dfsan");
604  if (SanArgs.needsLsanRt())
605  StaticRuntimes.push_back("lsan");
606  if (SanArgs.needsMsanRt()) {
607  StaticRuntimes.push_back("msan");
608  if (SanArgs.linkCXXRuntimes())
609  StaticRuntimes.push_back("msan_cxx");
610  }
611  if (SanArgs.needsTsanRt()) {
612  StaticRuntimes.push_back("tsan");
613  if (SanArgs.linkCXXRuntimes())
614  StaticRuntimes.push_back("tsan_cxx");
615  }
616  if (SanArgs.needsUbsanRt()) {
617  if (SanArgs.requiresMinimalRuntime()) {
618  StaticRuntimes.push_back("ubsan_minimal");
619  } else {
620  StaticRuntimes.push_back("ubsan_standalone");
621  if (SanArgs.linkCXXRuntimes())
622  StaticRuntimes.push_back("ubsan_standalone_cxx");
623  }
624  }
625  if (SanArgs.needsSafeStackRt()) {
626  NonWholeStaticRuntimes.push_back("safestack");
627  RequiredSymbols.push_back("__safestack_init");
628  }
629  if (SanArgs.needsCfiRt())
630  StaticRuntimes.push_back("cfi");
631  if (SanArgs.needsCfiDiagRt()) {
632  StaticRuntimes.push_back("cfi_diag");
633  if (SanArgs.linkCXXRuntimes())
634  StaticRuntimes.push_back("ubsan_standalone_cxx");
635  }
636  if (SanArgs.needsStatsRt()) {
637  NonWholeStaticRuntimes.push_back("stats");
638  RequiredSymbols.push_back("__sanitizer_stats_register");
639  }
640  if (SanArgs.needsEsanRt())
641  StaticRuntimes.push_back("esan");
642  if (SanArgs.needsScudoRt()) {
643  StaticRuntimes.push_back("scudo");
644  if (SanArgs.linkCXXRuntimes())
645  StaticRuntimes.push_back("scudo_cxx");
646  }
647 }
648 
649 // Should be called before we add system libraries (C++ ABI, libstdc++/libc++,
650 // C runtime, etc). Returns true if sanitizer system deps need to be linked in.
651 bool tools::addSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
652  ArgStringList &CmdArgs) {
653  SmallVector<StringRef, 4> SharedRuntimes, StaticRuntimes,
654  NonWholeStaticRuntimes, HelperStaticRuntimes, RequiredSymbols;
655  collectSanitizerRuntimes(TC, Args, SharedRuntimes, StaticRuntimes,
656  NonWholeStaticRuntimes, HelperStaticRuntimes,
657  RequiredSymbols);
658 
659  // Inject libfuzzer dependencies.
660  if (TC.getSanitizerArgs().needsFuzzer()
661  && !Args.hasArg(options::OPT_shared)) {
662 
663  addSanitizerRuntime(TC, Args, CmdArgs, "fuzzer", false, true);
664  if (!Args.hasArg(clang::driver::options::OPT_nostdlibxx))
665  TC.AddCXXStdlibLibArgs(Args, CmdArgs);
666  }
667 
668  for (auto RT : SharedRuntimes)
669  addSanitizerRuntime(TC, Args, CmdArgs, RT, true, false);
670  for (auto RT : HelperStaticRuntimes)
671  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
672  bool AddExportDynamic = false;
673  for (auto RT : StaticRuntimes) {
674  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
675  AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
676  }
677  for (auto RT : NonWholeStaticRuntimes) {
678  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, false);
679  AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
680  }
681  for (auto S : RequiredSymbols) {
682  CmdArgs.push_back("-u");
683  CmdArgs.push_back(Args.MakeArgString(S));
684  }
685  // If there is a static runtime with no dynamic list, force all the symbols
686  // to be dynamic to be sure we export sanitizer interface functions.
687  if (AddExportDynamic)
688  CmdArgs.push_back("-export-dynamic");
689 
690  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
691  if (SanArgs.hasCrossDsoCfi() && !AddExportDynamic)
692  CmdArgs.push_back("-export-dynamic-symbol=__cfi_check");
693 
694  return !StaticRuntimes.empty() || !NonWholeStaticRuntimes.empty();
695 }
696 
697 bool tools::areOptimizationsEnabled(const ArgList &Args) {
698  // Find the last -O arg and see if it is non-zero.
699  if (Arg *A = Args.getLastArg(options::OPT_O_Group))
700  return !A->getOption().matches(options::OPT_O0);
701  // Defaults to -O0.
702  return false;
703 }
704 
705 const char *tools::SplitDebugName(const ArgList &Args, const InputInfo &Input) {
706  Arg *FinalOutput = Args.getLastArg(options::OPT_o);
707  if (FinalOutput && Args.hasArg(options::OPT_c)) {
708  SmallString<128> T(FinalOutput->getValue());
709  llvm::sys::path::replace_extension(T, "dwo");
710  return Args.MakeArgString(T);
711  } else {
712  // Use the compilation dir.
714  Args.getLastArgValue(options::OPT_fdebug_compilation_dir));
715  SmallString<128> F(llvm::sys::path::stem(Input.getBaseInput()));
716  llvm::sys::path::replace_extension(F, "dwo");
717  T += F;
718  return Args.MakeArgString(F);
719  }
720 }
721 
722 void tools::SplitDebugInfo(const ToolChain &TC, Compilation &C, const Tool &T,
723  const JobAction &JA, const ArgList &Args,
724  const InputInfo &Output, const char *OutFile) {
725  ArgStringList ExtractArgs;
726  ExtractArgs.push_back("--extract-dwo");
727 
728  ArgStringList StripArgs;
729  StripArgs.push_back("--strip-dwo");
730 
731  // Grabbing the output of the earlier compile step.
732  StripArgs.push_back(Output.getFilename());
733  ExtractArgs.push_back(Output.getFilename());
734  ExtractArgs.push_back(OutFile);
735 
736  const char *Exec =
737  Args.MakeArgString(TC.GetProgramPath(CLANG_DEFAULT_OBJCOPY));
738  InputInfo II(types::TY_Object, Output.getFilename(), Output.getFilename());
739 
740  // First extract the dwo sections.
741  C.addCommand(llvm::make_unique<Command>(JA, T, Exec, ExtractArgs, II));
742 
743  // Then remove them from the original .o file.
744  C.addCommand(llvm::make_unique<Command>(JA, T, Exec, StripArgs, II));
745 }
746 
747 // Claim options we don't want to warn if they are unused. We do this for
748 // options that build systems might add but are unused when assembling or only
749 // running the preprocessor for example.
750 void tools::claimNoWarnArgs(const ArgList &Args) {
751  // Don't warn about unused -f(no-)?lto. This can happen when we're
752  // preprocessing, precompiling or assembling.
753  Args.ClaimAllArgs(options::OPT_flto_EQ);
754  Args.ClaimAllArgs(options::OPT_flto);
755  Args.ClaimAllArgs(options::OPT_fno_lto);
756 }
757 
758 Arg *tools::getLastProfileUseArg(const ArgList &Args) {
759  auto *ProfileUseArg = Args.getLastArg(
760  options::OPT_fprofile_instr_use, options::OPT_fprofile_instr_use_EQ,
761  options::OPT_fprofile_use, options::OPT_fprofile_use_EQ,
762  options::OPT_fno_profile_instr_use);
763 
764  if (ProfileUseArg &&
765  ProfileUseArg->getOption().matches(options::OPT_fno_profile_instr_use))
766  ProfileUseArg = nullptr;
767 
768  return ProfileUseArg;
769 }
770 
771 Arg *tools::getLastProfileSampleUseArg(const ArgList &Args) {
772  auto *ProfileSampleUseArg = Args.getLastArg(
773  options::OPT_fprofile_sample_use, options::OPT_fprofile_sample_use_EQ,
774  options::OPT_fauto_profile, options::OPT_fauto_profile_EQ,
775  options::OPT_fno_profile_sample_use, options::OPT_fno_auto_profile);
776 
777  if (ProfileSampleUseArg &&
778  (ProfileSampleUseArg->getOption().matches(
779  options::OPT_fno_profile_sample_use) ||
780  ProfileSampleUseArg->getOption().matches(options::OPT_fno_auto_profile)))
781  return nullptr;
782 
783  return Args.getLastArg(options::OPT_fprofile_sample_use_EQ,
784  options::OPT_fauto_profile_EQ);
785 }
786 
787 /// Parses the various -fpic/-fPIC/-fpie/-fPIE arguments. Then,
788 /// smooshes them together with platform defaults, to decide whether
789 /// this compile should be using PIC mode or not. Returns a tuple of
790 /// (RelocationModel, PICLevel, IsPIE).
791 std::tuple<llvm::Reloc::Model, unsigned, bool>
792 tools::ParsePICArgs(const ToolChain &ToolChain, const ArgList &Args) {
793  const llvm::Triple &EffectiveTriple = ToolChain.getEffectiveTriple();
794  const llvm::Triple &Triple = ToolChain.getTriple();
795 
796  bool PIE = ToolChain.isPIEDefault();
797  bool PIC = PIE || ToolChain.isPICDefault();
798  // The Darwin/MachO default to use PIC does not apply when using -static.
799  if (Triple.isOSBinFormatMachO() && Args.hasArg(options::OPT_static))
800  PIE = PIC = false;
801  bool IsPICLevelTwo = PIC;
802 
803  bool KernelOrKext =
804  Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
805 
806  // Android-specific defaults for PIC/PIE
807  if (Triple.isAndroid()) {
808  switch (Triple.getArch()) {
809  case llvm::Triple::arm:
810  case llvm::Triple::armeb:
811  case llvm::Triple::thumb:
812  case llvm::Triple::thumbeb:
813  case llvm::Triple::aarch64:
814  case llvm::Triple::mips:
815  case llvm::Triple::mipsel:
816  case llvm::Triple::mips64:
817  case llvm::Triple::mips64el:
818  PIC = true; // "-fpic"
819  break;
820 
821  case llvm::Triple::x86:
822  case llvm::Triple::x86_64:
823  PIC = true; // "-fPIC"
824  IsPICLevelTwo = true;
825  break;
826 
827  default:
828  break;
829  }
830  }
831 
832  // OpenBSD-specific defaults for PIE
833  if (Triple.getOS() == llvm::Triple::OpenBSD) {
834  switch (ToolChain.getArch()) {
835  case llvm::Triple::arm:
836  case llvm::Triple::aarch64:
837  case llvm::Triple::mips64:
838  case llvm::Triple::mips64el:
839  case llvm::Triple::x86:
840  case llvm::Triple::x86_64:
841  IsPICLevelTwo = false; // "-fpie"
842  break;
843 
844  case llvm::Triple::ppc:
845  case llvm::Triple::sparc:
846  case llvm::Triple::sparcel:
847  case llvm::Triple::sparcv9:
848  IsPICLevelTwo = true; // "-fPIE"
849  break;
850 
851  default:
852  break;
853  }
854  }
855 
856  // The last argument relating to either PIC or PIE wins, and no
857  // other argument is used. If the last argument is any flavor of the
858  // '-fno-...' arguments, both PIC and PIE are disabled. Any PIE
859  // option implicitly enables PIC at the same level.
860  Arg *LastPICArg = Args.getLastArg(options::OPT_fPIC, options::OPT_fno_PIC,
861  options::OPT_fpic, options::OPT_fno_pic,
862  options::OPT_fPIE, options::OPT_fno_PIE,
863  options::OPT_fpie, options::OPT_fno_pie);
864  if (Triple.isOSWindows() && LastPICArg &&
865  LastPICArg ==
866  Args.getLastArg(options::OPT_fPIC, options::OPT_fpic,
867  options::OPT_fPIE, options::OPT_fpie)) {
868  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
869  << LastPICArg->getSpelling() << Triple.str();
870  if (Triple.getArch() == llvm::Triple::x86_64)
871  return std::make_tuple(llvm::Reloc::PIC_, 2U, false);
872  return std::make_tuple(llvm::Reloc::Static, 0U, false);
873  }
874 
875  // Check whether the tool chain trumps the PIC-ness decision. If the PIC-ness
876  // is forced, then neither PIC nor PIE flags will have no effect.
877  if (!ToolChain.isPICDefaultForced()) {
878  if (LastPICArg) {
879  Option O = LastPICArg->getOption();
880  if (O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic) ||
881  O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie)) {
882  PIE = O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie);
883  PIC =
884  PIE || O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic);
885  IsPICLevelTwo =
886  O.matches(options::OPT_fPIE) || O.matches(options::OPT_fPIC);
887  } else {
888  PIE = PIC = false;
889  if (EffectiveTriple.isPS4CPU()) {
890  Arg *ModelArg = Args.getLastArg(options::OPT_mcmodel_EQ);
891  StringRef Model = ModelArg ? ModelArg->getValue() : "";
892  if (Model != "kernel") {
893  PIC = true;
894  ToolChain.getDriver().Diag(diag::warn_drv_ps4_force_pic)
895  << LastPICArg->getSpelling();
896  }
897  }
898  }
899  }
900  }
901 
902  // Introduce a Darwin and PS4-specific hack. If the default is PIC, but the
903  // PIC level would've been set to level 1, force it back to level 2 PIC
904  // instead.
905  if (PIC && (Triple.isOSDarwin() || EffectiveTriple.isPS4CPU()))
906  IsPICLevelTwo |= ToolChain.isPICDefault();
907 
908  // This kernel flags are a trump-card: they will disable PIC/PIE
909  // generation, independent of the argument order.
910  if (KernelOrKext &&
911  ((!EffectiveTriple.isiOS() || EffectiveTriple.isOSVersionLT(6)) &&
912  !EffectiveTriple.isWatchOS()))
913  PIC = PIE = false;
914 
915  if (Arg *A = Args.getLastArg(options::OPT_mdynamic_no_pic)) {
916  // This is a very special mode. It trumps the other modes, almost no one
917  // uses it, and it isn't even valid on any OS but Darwin.
918  if (!Triple.isOSDarwin())
919  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
920  << A->getSpelling() << Triple.str();
921 
922  // FIXME: Warn when this flag trumps some other PIC or PIE flag.
923 
924  // Only a forced PIC mode can cause the actual compile to have PIC defines
925  // etc., no flags are sufficient. This behavior was selected to closely
926  // match that of llvm-gcc and Apple GCC before that.
927  PIC = ToolChain.isPICDefault() && ToolChain.isPICDefaultForced();
928 
929  return std::make_tuple(llvm::Reloc::DynamicNoPIC, PIC ? 2U : 0U, false);
930  }
931 
932  bool EmbeddedPISupported;
933  switch (Triple.getArch()) {
934  case llvm::Triple::arm:
935  case llvm::Triple::armeb:
936  case llvm::Triple::thumb:
937  case llvm::Triple::thumbeb:
938  EmbeddedPISupported = true;
939  break;
940  default:
941  EmbeddedPISupported = false;
942  break;
943  }
944 
945  bool ROPI = false, RWPI = false;
946  Arg* LastROPIArg = Args.getLastArg(options::OPT_fropi, options::OPT_fno_ropi);
947  if (LastROPIArg && LastROPIArg->getOption().matches(options::OPT_fropi)) {
948  if (!EmbeddedPISupported)
949  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
950  << LastROPIArg->getSpelling() << Triple.str();
951  ROPI = true;
952  }
953  Arg *LastRWPIArg = Args.getLastArg(options::OPT_frwpi, options::OPT_fno_rwpi);
954  if (LastRWPIArg && LastRWPIArg->getOption().matches(options::OPT_frwpi)) {
955  if (!EmbeddedPISupported)
956  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
957  << LastRWPIArg->getSpelling() << Triple.str();
958  RWPI = true;
959  }
960 
961  // ROPI and RWPI are not comaptible with PIC or PIE.
962  if ((ROPI || RWPI) && (PIC || PIE))
963  ToolChain.getDriver().Diag(diag::err_drv_ropi_rwpi_incompatible_with_pic);
964 
965  // When targettng MIPS64 with N64, the default is PIC, unless -mno-abicalls is
966  // used.
967  if ((Triple.getArch() == llvm::Triple::mips64 ||
968  Triple.getArch() == llvm::Triple::mips64el) &&
969  Args.hasArg(options::OPT_mno_abicalls))
970  return std::make_tuple(llvm::Reloc::Static, 0U, false);
971 
972  if (PIC)
973  return std::make_tuple(llvm::Reloc::PIC_, IsPICLevelTwo ? 2U : 1U, PIE);
974 
975  llvm::Reloc::Model RelocM = llvm::Reloc::Static;
976  if (ROPI && RWPI)
977  RelocM = llvm::Reloc::ROPI_RWPI;
978  else if (ROPI)
979  RelocM = llvm::Reloc::ROPI;
980  else if (RWPI)
981  RelocM = llvm::Reloc::RWPI;
982 
983  return std::make_tuple(RelocM, 0U, false);
984 }
985 
986 void tools::AddAssemblerKPIC(const ToolChain &ToolChain, const ArgList &Args,
987  ArgStringList &CmdArgs) {
988  llvm::Reloc::Model RelocationModel;
989  unsigned PICLevel;
990  bool IsPIE;
991  std::tie(RelocationModel, PICLevel, IsPIE) = ParsePICArgs(ToolChain, Args);
992 
993  if (RelocationModel != llvm::Reloc::Static)
994  CmdArgs.push_back("-KPIC");
995 }
996 
997 /// \brief Determine whether Objective-C automated reference counting is
998 /// enabled.
999 bool tools::isObjCAutoRefCount(const ArgList &Args) {
1000  return Args.hasFlag(options::OPT_fobjc_arc, options::OPT_fno_objc_arc, false);
1001 }
1002 
1003 static void AddLibgcc(const llvm::Triple &Triple, const Driver &D,
1004  ArgStringList &CmdArgs, const ArgList &Args) {
1005  bool isAndroid = Triple.isAndroid();
1006  bool isCygMing = Triple.isOSCygMing();
1007  bool IsIAMCU = Triple.isOSIAMCU();
1008  bool StaticLibgcc = Args.hasArg(options::OPT_static_libgcc) ||
1009  Args.hasArg(options::OPT_static);
1010  if (!D.CCCIsCXX())
1011  CmdArgs.push_back("-lgcc");
1012 
1013  if (StaticLibgcc || isAndroid) {
1014  if (D.CCCIsCXX())
1015  CmdArgs.push_back("-lgcc");
1016  } else {
1017  if (!D.CCCIsCXX() && !isCygMing)
1018  CmdArgs.push_back("--as-needed");
1019  CmdArgs.push_back("-lgcc_s");
1020  if (!D.CCCIsCXX() && !isCygMing)
1021  CmdArgs.push_back("--no-as-needed");
1022  }
1023 
1024  if (StaticLibgcc && !isAndroid && !IsIAMCU)
1025  CmdArgs.push_back("-lgcc_eh");
1026  else if (!Args.hasArg(options::OPT_shared) && D.CCCIsCXX())
1027  CmdArgs.push_back("-lgcc");
1028 
1029  // According to Android ABI, we have to link with libdl if we are
1030  // linking with non-static libgcc.
1031  //
1032  // NOTE: This fixes a link error on Android MIPS as well. The non-static
1033  // libgcc for MIPS relies on _Unwind_Find_FDE and dl_iterate_phdr from libdl.
1034  if (isAndroid && !StaticLibgcc)
1035  CmdArgs.push_back("-ldl");
1036 }
1037 
1038 void tools::AddRunTimeLibs(const ToolChain &TC, const Driver &D,
1039  ArgStringList &CmdArgs, const ArgList &Args) {
1040  // Make use of compiler-rt if --rtlib option is used
1042 
1043  switch (RLT) {
1045  CmdArgs.push_back(TC.getCompilerRTArgString(Args, "builtins"));
1046  break;
1047  case ToolChain::RLT_Libgcc:
1048  // Make sure libgcc is not used under MSVC environment by default
1049  if (TC.getTriple().isKnownWindowsMSVCEnvironment()) {
1050  // Issue error diagnostic if libgcc is explicitly specified
1051  // through command line as --rtlib option argument.
1052  if (Args.hasArg(options::OPT_rtlib_EQ)) {
1053  TC.getDriver().Diag(diag::err_drv_unsupported_rtlib_for_platform)
1054  << Args.getLastArg(options::OPT_rtlib_EQ)->getValue() << "MSVC";
1055  }
1056  } else
1057  AddLibgcc(TC.getTriple(), D, CmdArgs, Args);
1058  break;
1059  }
1060 }
1061 
1062 /// Add OpenMP linker script arguments at the end of the argument list so that
1063 /// the fat binary is built by embedding each of the device images into the
1064 /// host. The linker script also defines a few symbols required by the code
1065 /// generation so that the images can be easily retrieved at runtime by the
1066 /// offloading library. This should be used only in tool chains that support
1067 /// linker scripts.
1068 void tools::AddOpenMPLinkerScript(const ToolChain &TC, Compilation &C,
1069  const InputInfo &Output,
1070  const InputInfoList &Inputs,
1071  const ArgList &Args, ArgStringList &CmdArgs,
1072  const JobAction &JA) {
1073 
1074  // If this is not an OpenMP host toolchain, we don't need to do anything.
1076  return;
1077 
1078  // Create temporary linker script. Keep it if save-temps is enabled.
1079  const char *LKS;
1080  SmallString<256> Name = llvm::sys::path::filename(Output.getFilename());
1081  if (C.getDriver().isSaveTempsEnabled()) {
1082  llvm::sys::path::replace_extension(Name, "lk");
1083  LKS = C.getArgs().MakeArgString(Name.c_str());
1084  } else {
1085  llvm::sys::path::replace_extension(Name, "");
1086  Name = C.getDriver().GetTemporaryPath(Name, "lk");
1087  LKS = C.addTempFile(C.getArgs().MakeArgString(Name.c_str()));
1088  }
1089 
1090  // Add linker script option to the command.
1091  CmdArgs.push_back("-T");
1092  CmdArgs.push_back(LKS);
1093 
1094  // Create a buffer to write the contents of the linker script.
1095  std::string LksBuffer;
1096  llvm::raw_string_ostream LksStream(LksBuffer);
1097 
1098  // Get the OpenMP offload tool chains so that we can extract the triple
1099  // associated with each device input.
1100  auto OpenMPToolChains = C.getOffloadToolChains<Action::OFK_OpenMP>();
1101  assert(OpenMPToolChains.first != OpenMPToolChains.second &&
1102  "No OpenMP toolchains??");
1103 
1104  // Track the input file name and device triple in order to build the script,
1105  // inserting binaries in the designated sections.
1107 
1108  // Add commands to embed target binaries. We ensure that each section and
1109  // image is 16-byte aligned. This is not mandatory, but increases the
1110  // likelihood of data to be aligned with a cache block in several main host
1111  // machines.
1112  LksStream << "/*\n";
1113  LksStream << " OpenMP Offload Linker Script\n";
1114  LksStream << " *** Automatically generated by Clang ***\n";
1115  LksStream << "*/\n";
1116  LksStream << "TARGET(binary)\n";
1117  auto DTC = OpenMPToolChains.first;
1118  for (auto &II : Inputs) {
1119  const Action *A = II.getAction();
1120  // Is this a device linking action?
1121  if (A && isa<LinkJobAction>(A) &&
1123  assert(DTC != OpenMPToolChains.second &&
1124  "More device inputs than device toolchains??");
1125  InputBinaryInfo.push_back(std::make_pair(
1126  DTC->second->getTriple().normalize(), II.getFilename()));
1127  ++DTC;
1128  LksStream << "INPUT(" << II.getFilename() << ")\n";
1129  }
1130  }
1131 
1132  assert(DTC == OpenMPToolChains.second &&
1133  "Less device inputs than device toolchains??");
1134 
1135  LksStream << "SECTIONS\n";
1136  LksStream << "{\n";
1137 
1138  // Put each target binary into a separate section.
1139  for (const auto &BI : InputBinaryInfo) {
1140  LksStream << " .omp_offloading." << BI.first << " :\n";
1141  LksStream << " ALIGN(0x10)\n";
1142  LksStream << " {\n";
1143  LksStream << " PROVIDE_HIDDEN(.omp_offloading.img_start." << BI.first
1144  << " = .);\n";
1145  LksStream << " " << BI.second << "\n";
1146  LksStream << " PROVIDE_HIDDEN(.omp_offloading.img_end." << BI.first
1147  << " = .);\n";
1148  LksStream << " }\n";
1149  }
1150 
1151  // Add commands to define host entries begin and end. We use 1-byte subalign
1152  // so that the linker does not add any padding and the elements in this
1153  // section form an array.
1154  LksStream << " .omp_offloading.entries :\n";
1155  LksStream << " ALIGN(0x10)\n";
1156  LksStream << " SUBALIGN(0x01)\n";
1157  LksStream << " {\n";
1158  LksStream << " PROVIDE_HIDDEN(.omp_offloading.entries_begin = .);\n";
1159  LksStream << " *(.omp_offloading.entries)\n";
1160  LksStream << " PROVIDE_HIDDEN(.omp_offloading.entries_end = .);\n";
1161  LksStream << " }\n";
1162  LksStream << "}\n";
1163  LksStream << "INSERT BEFORE .data\n";
1164  LksStream.flush();
1165 
1166  // Dump the contents of the linker script if the user requested that. We
1167  // support this option to enable testing of behavior with -###.
1168  if (C.getArgs().hasArg(options::OPT_fopenmp_dump_offload_linker_script))
1169  llvm::errs() << LksBuffer;
1170 
1171  // If this is a dry run, do not create the linker script file.
1172  if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
1173  return;
1174 
1175  // Open script file and write the contents.
1176  std::error_code EC;
1177  llvm::raw_fd_ostream Lksf(LKS, EC, llvm::sys::fs::F_None);
1178 
1179  if (EC) {
1180  C.getDriver().Diag(clang::diag::err_unable_to_make_temp) << EC.message();
1181  return;
1182  }
1183 
1184  Lksf << LksBuffer;
1185 }
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:482
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:3775
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:116
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:127
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:102
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:65
An unknown OpenMP runtime.
Definition: Driver.h:98
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:579
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:284
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:112
bool CCCIsCXX() const
Whether the driver should follow g++ like behavior.
Definition: Driver.h:174
bool isSaveTempsEnabled() const
Definition: Driver.h:310
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:107
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:555
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