clang  7.0.0svn
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 uses -ffunction-sections and -fdata-sections by default.
367 bool tools::isUseSeparateSections(const llvm::Triple &Triple) {
368  return Triple.getOS() == llvm::Triple::CloudABI;
369 }
370 
371 void tools::AddGoldPlugin(const ToolChain &ToolChain, const ArgList &Args,
372  ArgStringList &CmdArgs, bool IsThinLTO,
373  const Driver &D) {
374  // Tell the linker to load the plugin. This has to come before AddLinkerInputs
375  // as gold requires -plugin to come before any -plugin-opt that -Wl might
376  // forward.
377  CmdArgs.push_back("-plugin");
378 
379 #if defined(LLVM_ON_WIN32)
380  const char *Suffix = ".dll";
381 #elif defined(__APPLE__)
382  const char *Suffix = ".dylib";
383 #else
384  const char *Suffix = ".so";
385 #endif
386 
387  SmallString<1024> Plugin;
388  llvm::sys::path::native(Twine(ToolChain.getDriver().Dir) +
389  "/../lib" CLANG_LIBDIR_SUFFIX "/LLVMgold" +
390  Suffix,
391  Plugin);
392  CmdArgs.push_back(Args.MakeArgString(Plugin));
393 
394  // Try to pass driver level flags relevant to LTO code generation down to
395  // the plugin.
396 
397  // Handle flags for selecting CPU variants.
398  std::string CPU = getCPUName(Args, ToolChain.getTriple());
399  if (!CPU.empty())
400  CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=mcpu=") + CPU));
401 
402  if (Arg *A = Args.getLastArg(options::OPT_O_Group)) {
403  StringRef OOpt;
404  if (A->getOption().matches(options::OPT_O4) ||
405  A->getOption().matches(options::OPT_Ofast))
406  OOpt = "3";
407  else if (A->getOption().matches(options::OPT_O))
408  OOpt = A->getValue();
409  else if (A->getOption().matches(options::OPT_O0))
410  OOpt = "0";
411  if (!OOpt.empty())
412  CmdArgs.push_back(Args.MakeArgString(Twine("-plugin-opt=O") + OOpt));
413  }
414 
415  if (IsThinLTO)
416  CmdArgs.push_back("-plugin-opt=thinlto");
417 
418  if (unsigned Parallelism = getLTOParallelism(Args, D))
419  CmdArgs.push_back(
420  Args.MakeArgString("-plugin-opt=jobs=" + Twine(Parallelism)));
421 
422  // If an explicit debugger tuning argument appeared, pass it along.
423  if (Arg *A = Args.getLastArg(options::OPT_gTune_Group,
424  options::OPT_ggdbN_Group)) {
425  if (A->getOption().matches(options::OPT_glldb))
426  CmdArgs.push_back("-plugin-opt=-debugger-tune=lldb");
427  else if (A->getOption().matches(options::OPT_gsce))
428  CmdArgs.push_back("-plugin-opt=-debugger-tune=sce");
429  else
430  CmdArgs.push_back("-plugin-opt=-debugger-tune=gdb");
431  }
432 
433  bool UseSeparateSections =
435 
436  if (Args.hasFlag(options::OPT_ffunction_sections,
437  options::OPT_fno_function_sections, UseSeparateSections)) {
438  CmdArgs.push_back("-plugin-opt=-function-sections");
439  }
440 
441  if (Args.hasFlag(options::OPT_fdata_sections, options::OPT_fno_data_sections,
442  UseSeparateSections)) {
443  CmdArgs.push_back("-plugin-opt=-data-sections");
444  }
445 
446  if (Arg *A = getLastProfileSampleUseArg(Args)) {
447  StringRef FName = A->getValue();
448  if (!llvm::sys::fs::exists(FName))
449  D.Diag(diag::err_drv_no_such_file) << FName;
450  else
451  CmdArgs.push_back(
452  Args.MakeArgString(Twine("-plugin-opt=sample-profile=") + FName));
453  }
454 
455  // Need this flag to turn on new pass manager via Gold plugin.
456  if (Args.hasFlag(options::OPT_fexperimental_new_pass_manager,
457  options::OPT_fno_experimental_new_pass_manager,
458  /* Default */ false)) {
459  CmdArgs.push_back("-plugin-opt=new-pass-manager");
460  }
461 
462 }
463 
464 void tools::addArchSpecificRPath(const ToolChain &TC, const ArgList &Args,
465  ArgStringList &CmdArgs) {
466  std::string CandidateRPath = TC.getArchSpecificLibPath();
467  if (TC.getVFS().exists(CandidateRPath)) {
468  CmdArgs.push_back("-rpath");
469  CmdArgs.push_back(Args.MakeArgString(CandidateRPath.c_str()));
470  }
471 }
472 
473 bool tools::addOpenMPRuntime(ArgStringList &CmdArgs, const ToolChain &TC,
474  const ArgList &Args, bool IsOffloadingHost,
475  bool GompNeedsRT) {
476  if (!Args.hasFlag(options::OPT_fopenmp, options::OPT_fopenmp_EQ,
477  options::OPT_fno_openmp, false))
478  return false;
479 
480  switch (TC.getDriver().getOpenMPRuntime(Args)) {
481  case Driver::OMPRT_OMP:
482  CmdArgs.push_back("-lomp");
483  break;
484  case Driver::OMPRT_GOMP:
485  CmdArgs.push_back("-lgomp");
486 
487  if (GompNeedsRT)
488  CmdArgs.push_back("-lrt");
489  break;
490  case Driver::OMPRT_IOMP5:
491  CmdArgs.push_back("-liomp5");
492  break;
494  // Already diagnosed.
495  return false;
496  }
497 
498  if (IsOffloadingHost)
499  CmdArgs.push_back("-lomptarget");
500 
501  addArchSpecificRPath(TC, Args, CmdArgs);
502 
503  return true;
504 }
505 
506 static void addSanitizerRuntime(const ToolChain &TC, const ArgList &Args,
507  ArgStringList &CmdArgs, StringRef Sanitizer,
508  bool IsShared, bool IsWhole) {
509  // Wrap any static runtimes that must be forced into executable in
510  // whole-archive.
511  if (IsWhole) CmdArgs.push_back("--whole-archive");
512  CmdArgs.push_back(TC.getCompilerRTArgString(Args, Sanitizer, IsShared));
513  if (IsWhole) CmdArgs.push_back("--no-whole-archive");
514 
515  if (IsShared) {
516  addArchSpecificRPath(TC, Args, CmdArgs);
517  }
518 }
519 
520 // Tries to use a file with the list of dynamic symbols that need to be exported
521 // from the runtime library. Returns true if the file was found.
522 static bool addSanitizerDynamicList(const ToolChain &TC, const ArgList &Args,
523  ArgStringList &CmdArgs,
524  StringRef Sanitizer) {
525  // Solaris ld defaults to --export-dynamic behaviour but doesn't support
526  // the option, so don't try to pass it.
527  if (TC.getTriple().getOS() == llvm::Triple::Solaris)
528  return true;
529  SmallString<128> SanRT(TC.getCompilerRT(Args, Sanitizer));
530  if (llvm::sys::fs::exists(SanRT + ".syms")) {
531  CmdArgs.push_back(Args.MakeArgString("--dynamic-list=" + SanRT + ".syms"));
532  return true;
533  }
534  return false;
535 }
536 
537 void tools::linkSanitizerRuntimeDeps(const ToolChain &TC,
538  ArgStringList &CmdArgs) {
539  // Force linking against the system libraries sanitizers depends on
540  // (see PR15823 why this is necessary).
541  CmdArgs.push_back("--no-as-needed");
542  // There's no libpthread or librt on RTEMS.
543  if (TC.getTriple().getOS() != llvm::Triple::RTEMS) {
544  CmdArgs.push_back("-lpthread");
545  CmdArgs.push_back("-lrt");
546  }
547  CmdArgs.push_back("-lm");
548  // There's no libdl on all OSes.
549  if (TC.getTriple().getOS() != llvm::Triple::FreeBSD &&
550  TC.getTriple().getOS() != llvm::Triple::NetBSD &&
551  TC.getTriple().getOS() != llvm::Triple::RTEMS)
552  CmdArgs.push_back("-ldl");
553  // Required for backtrace on some OSes
554  if (TC.getTriple().getOS() == llvm::Triple::NetBSD ||
555  TC.getTriple().getOS() == llvm::Triple::FreeBSD)
556  CmdArgs.push_back("-lexecinfo");
557 }
558 
559 static void
560 collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
561  SmallVectorImpl<StringRef> &SharedRuntimes,
562  SmallVectorImpl<StringRef> &StaticRuntimes,
563  SmallVectorImpl<StringRef> &NonWholeStaticRuntimes,
564  SmallVectorImpl<StringRef> &HelperStaticRuntimes,
565  SmallVectorImpl<StringRef> &RequiredSymbols) {
566  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
567  // Collect shared runtimes.
568  if (SanArgs.needsSharedRt()) {
569  if (SanArgs.needsAsanRt()) {
570  SharedRuntimes.push_back("asan");
571  if (!Args.hasArg(options::OPT_shared) && !TC.getTriple().isAndroid())
572  HelperStaticRuntimes.push_back("asan-preinit");
573  }
574  if (SanArgs.needsUbsanRt()) {
575  if (SanArgs.requiresMinimalRuntime()) {
576  SharedRuntimes.push_back("ubsan_minimal");
577  } else {
578  SharedRuntimes.push_back("ubsan_standalone");
579  }
580  }
581  if (SanArgs.needsScudoRt())
582  SharedRuntimes.push_back("scudo");
583  if (SanArgs.needsHwasanRt())
584  SharedRuntimes.push_back("hwasan");
585  }
586 
587  // The stats_client library is also statically linked into DSOs.
588  if (SanArgs.needsStatsRt())
589  StaticRuntimes.push_back("stats_client");
590 
591  // Collect static runtimes.
592  if (Args.hasArg(options::OPT_shared) || SanArgs.needsSharedRt()) {
593  // Don't link static runtimes into DSOs or if -shared-libasan.
594  return;
595  }
596  if (SanArgs.needsAsanRt()) {
597  StaticRuntimes.push_back("asan");
598  if (SanArgs.linkCXXRuntimes())
599  StaticRuntimes.push_back("asan_cxx");
600  }
601 
602  if (SanArgs.needsHwasanRt()) {
603  StaticRuntimes.push_back("hwasan");
604  if (SanArgs.linkCXXRuntimes())
605  StaticRuntimes.push_back("hwasan_cxx");
606  }
607  if (SanArgs.needsDfsanRt())
608  StaticRuntimes.push_back("dfsan");
609  if (SanArgs.needsLsanRt())
610  StaticRuntimes.push_back("lsan");
611  if (SanArgs.needsMsanRt()) {
612  StaticRuntimes.push_back("msan");
613  if (SanArgs.linkCXXRuntimes())
614  StaticRuntimes.push_back("msan_cxx");
615  }
616  if (SanArgs.needsTsanRt()) {
617  StaticRuntimes.push_back("tsan");
618  if (SanArgs.linkCXXRuntimes())
619  StaticRuntimes.push_back("tsan_cxx");
620  }
621  if (SanArgs.needsUbsanRt()) {
622  if (SanArgs.requiresMinimalRuntime()) {
623  StaticRuntimes.push_back("ubsan_minimal");
624  } else {
625  StaticRuntimes.push_back("ubsan_standalone");
626  if (SanArgs.linkCXXRuntimes())
627  StaticRuntimes.push_back("ubsan_standalone_cxx");
628  }
629  }
630  if (SanArgs.needsSafeStackRt()) {
631  NonWholeStaticRuntimes.push_back("safestack");
632  RequiredSymbols.push_back("__safestack_init");
633  }
634  if (SanArgs.needsCfiRt())
635  StaticRuntimes.push_back("cfi");
636  if (SanArgs.needsCfiDiagRt()) {
637  StaticRuntimes.push_back("cfi_diag");
638  if (SanArgs.linkCXXRuntimes())
639  StaticRuntimes.push_back("ubsan_standalone_cxx");
640  }
641  if (SanArgs.needsStatsRt()) {
642  NonWholeStaticRuntimes.push_back("stats");
643  RequiredSymbols.push_back("__sanitizer_stats_register");
644  }
645  if (SanArgs.needsEsanRt())
646  StaticRuntimes.push_back("esan");
647  if (SanArgs.needsScudoRt()) {
648  StaticRuntimes.push_back("scudo");
649  if (SanArgs.linkCXXRuntimes())
650  StaticRuntimes.push_back("scudo_cxx");
651  }
652 }
653 
654 // Should be called before we add system libraries (C++ ABI, libstdc++/libc++,
655 // C runtime, etc). Returns true if sanitizer system deps need to be linked in.
656 bool tools::addSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
657  ArgStringList &CmdArgs) {
658  SmallVector<StringRef, 4> SharedRuntimes, StaticRuntimes,
659  NonWholeStaticRuntimes, HelperStaticRuntimes, RequiredSymbols;
660  collectSanitizerRuntimes(TC, Args, SharedRuntimes, StaticRuntimes,
661  NonWholeStaticRuntimes, HelperStaticRuntimes,
662  RequiredSymbols);
663 
664  // Inject libfuzzer dependencies.
665  if (TC.getSanitizerArgs().needsFuzzer()
666  && !Args.hasArg(options::OPT_shared)) {
667 
668  addSanitizerRuntime(TC, Args, CmdArgs, "fuzzer", false, true);
669  if (!Args.hasArg(clang::driver::options::OPT_nostdlibxx))
670  TC.AddCXXStdlibLibArgs(Args, CmdArgs);
671  }
672 
673  for (auto RT : SharedRuntimes)
674  addSanitizerRuntime(TC, Args, CmdArgs, RT, true, false);
675  for (auto RT : HelperStaticRuntimes)
676  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
677  bool AddExportDynamic = false;
678  for (auto RT : StaticRuntimes) {
679  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, true);
680  AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
681  }
682  for (auto RT : NonWholeStaticRuntimes) {
683  addSanitizerRuntime(TC, Args, CmdArgs, RT, false, false);
684  AddExportDynamic |= !addSanitizerDynamicList(TC, Args, CmdArgs, RT);
685  }
686  for (auto S : RequiredSymbols) {
687  CmdArgs.push_back("-u");
688  CmdArgs.push_back(Args.MakeArgString(S));
689  }
690  // If there is a static runtime with no dynamic list, force all the symbols
691  // to be dynamic to be sure we export sanitizer interface functions.
692  if (AddExportDynamic)
693  CmdArgs.push_back("--export-dynamic");
694 
695  const SanitizerArgs &SanArgs = TC.getSanitizerArgs();
696  if (SanArgs.hasCrossDsoCfi() && !AddExportDynamic)
697  CmdArgs.push_back("-export-dynamic-symbol=__cfi_check");
698 
699  return !StaticRuntimes.empty() || !NonWholeStaticRuntimes.empty();
700 }
701 
702 bool tools::areOptimizationsEnabled(const ArgList &Args) {
703  // Find the last -O arg and see if it is non-zero.
704  if (Arg *A = Args.getLastArg(options::OPT_O_Group))
705  return !A->getOption().matches(options::OPT_O0);
706  // Defaults to -O0.
707  return false;
708 }
709 
710 const char *tools::SplitDebugName(const ArgList &Args, const InputInfo &Input) {
711  Arg *FinalOutput = Args.getLastArg(options::OPT_o);
712  if (FinalOutput && Args.hasArg(options::OPT_c)) {
713  SmallString<128> T(FinalOutput->getValue());
714  llvm::sys::path::replace_extension(T, "dwo");
715  return Args.MakeArgString(T);
716  } else {
717  // Use the compilation dir.
719  Args.getLastArgValue(options::OPT_fdebug_compilation_dir));
720  SmallString<128> F(llvm::sys::path::stem(Input.getBaseInput()));
721  llvm::sys::path::replace_extension(F, "dwo");
722  T += F;
723  return Args.MakeArgString(F);
724  }
725 }
726 
727 void tools::SplitDebugInfo(const ToolChain &TC, Compilation &C, const Tool &T,
728  const JobAction &JA, const ArgList &Args,
729  const InputInfo &Output, const char *OutFile) {
730  ArgStringList ExtractArgs;
731  ExtractArgs.push_back("--extract-dwo");
732 
733  ArgStringList StripArgs;
734  StripArgs.push_back("--strip-dwo");
735 
736  // Grabbing the output of the earlier compile step.
737  StripArgs.push_back(Output.getFilename());
738  ExtractArgs.push_back(Output.getFilename());
739  ExtractArgs.push_back(OutFile);
740 
741  const char *Exec =
742  Args.MakeArgString(TC.GetProgramPath(CLANG_DEFAULT_OBJCOPY));
743  InputInfo II(types::TY_Object, Output.getFilename(), Output.getFilename());
744 
745  // First extract the dwo sections.
746  C.addCommand(llvm::make_unique<Command>(JA, T, Exec, ExtractArgs, II));
747 
748  // Then remove them from the original .o file.
749  C.addCommand(llvm::make_unique<Command>(JA, T, Exec, StripArgs, II));
750 }
751 
752 // Claim options we don't want to warn if they are unused. We do this for
753 // options that build systems might add but are unused when assembling or only
754 // running the preprocessor for example.
755 void tools::claimNoWarnArgs(const ArgList &Args) {
756  // Don't warn about unused -f(no-)?lto. This can happen when we're
757  // preprocessing, precompiling or assembling.
758  Args.ClaimAllArgs(options::OPT_flto_EQ);
759  Args.ClaimAllArgs(options::OPT_flto);
760  Args.ClaimAllArgs(options::OPT_fno_lto);
761 }
762 
763 Arg *tools::getLastProfileUseArg(const ArgList &Args) {
764  auto *ProfileUseArg = Args.getLastArg(
765  options::OPT_fprofile_instr_use, options::OPT_fprofile_instr_use_EQ,
766  options::OPT_fprofile_use, options::OPT_fprofile_use_EQ,
767  options::OPT_fno_profile_instr_use);
768 
769  if (ProfileUseArg &&
770  ProfileUseArg->getOption().matches(options::OPT_fno_profile_instr_use))
771  ProfileUseArg = nullptr;
772 
773  return ProfileUseArg;
774 }
775 
776 Arg *tools::getLastProfileSampleUseArg(const ArgList &Args) {
777  auto *ProfileSampleUseArg = Args.getLastArg(
778  options::OPT_fprofile_sample_use, options::OPT_fprofile_sample_use_EQ,
779  options::OPT_fauto_profile, options::OPT_fauto_profile_EQ,
780  options::OPT_fno_profile_sample_use, options::OPT_fno_auto_profile);
781 
782  if (ProfileSampleUseArg &&
783  (ProfileSampleUseArg->getOption().matches(
784  options::OPT_fno_profile_sample_use) ||
785  ProfileSampleUseArg->getOption().matches(options::OPT_fno_auto_profile)))
786  return nullptr;
787 
788  return Args.getLastArg(options::OPT_fprofile_sample_use_EQ,
789  options::OPT_fauto_profile_EQ);
790 }
791 
792 /// Parses the various -fpic/-fPIC/-fpie/-fPIE arguments. Then,
793 /// smooshes them together with platform defaults, to decide whether
794 /// this compile should be using PIC mode or not. Returns a tuple of
795 /// (RelocationModel, PICLevel, IsPIE).
796 std::tuple<llvm::Reloc::Model, unsigned, bool>
797 tools::ParsePICArgs(const ToolChain &ToolChain, const ArgList &Args) {
798  const llvm::Triple &EffectiveTriple = ToolChain.getEffectiveTriple();
799  const llvm::Triple &Triple = ToolChain.getTriple();
800 
801  bool PIE = ToolChain.isPIEDefault();
802  bool PIC = PIE || ToolChain.isPICDefault();
803  // The Darwin/MachO default to use PIC does not apply when using -static.
804  if (Triple.isOSBinFormatMachO() && Args.hasArg(options::OPT_static))
805  PIE = PIC = false;
806  bool IsPICLevelTwo = PIC;
807 
808  bool KernelOrKext =
809  Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
810 
811  // Android-specific defaults for PIC/PIE
812  if (Triple.isAndroid()) {
813  switch (Triple.getArch()) {
814  case llvm::Triple::arm:
815  case llvm::Triple::armeb:
816  case llvm::Triple::thumb:
817  case llvm::Triple::thumbeb:
818  case llvm::Triple::aarch64:
819  case llvm::Triple::mips:
820  case llvm::Triple::mipsel:
821  case llvm::Triple::mips64:
822  case llvm::Triple::mips64el:
823  PIC = true; // "-fpic"
824  break;
825 
826  case llvm::Triple::x86:
827  case llvm::Triple::x86_64:
828  PIC = true; // "-fPIC"
829  IsPICLevelTwo = true;
830  break;
831 
832  default:
833  break;
834  }
835  }
836 
837  // OpenBSD-specific defaults for PIE
838  if (Triple.getOS() == llvm::Triple::OpenBSD) {
839  switch (ToolChain.getArch()) {
840  case llvm::Triple::arm:
841  case llvm::Triple::aarch64:
842  case llvm::Triple::mips64:
843  case llvm::Triple::mips64el:
844  case llvm::Triple::x86:
845  case llvm::Triple::x86_64:
846  IsPICLevelTwo = false; // "-fpie"
847  break;
848 
849  case llvm::Triple::ppc:
850  case llvm::Triple::sparc:
851  case llvm::Triple::sparcel:
852  case llvm::Triple::sparcv9:
853  IsPICLevelTwo = true; // "-fPIE"
854  break;
855 
856  default:
857  break;
858  }
859  }
860 
861  // AMDGPU-specific defaults for PIC.
862  if (Triple.getArch() == llvm::Triple::amdgcn)
863  PIC = true;
864 
865  // The last argument relating to either PIC or PIE wins, and no
866  // other argument is used. If the last argument is any flavor of the
867  // '-fno-...' arguments, both PIC and PIE are disabled. Any PIE
868  // option implicitly enables PIC at the same level.
869  Arg *LastPICArg = Args.getLastArg(options::OPT_fPIC, options::OPT_fno_PIC,
870  options::OPT_fpic, options::OPT_fno_pic,
871  options::OPT_fPIE, options::OPT_fno_PIE,
872  options::OPT_fpie, options::OPT_fno_pie);
873  if (Triple.isOSWindows() && LastPICArg &&
874  LastPICArg ==
875  Args.getLastArg(options::OPT_fPIC, options::OPT_fpic,
876  options::OPT_fPIE, options::OPT_fpie)) {
877  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
878  << LastPICArg->getSpelling() << Triple.str();
879  if (Triple.getArch() == llvm::Triple::x86_64)
880  return std::make_tuple(llvm::Reloc::PIC_, 2U, false);
881  return std::make_tuple(llvm::Reloc::Static, 0U, false);
882  }
883 
884  // Check whether the tool chain trumps the PIC-ness decision. If the PIC-ness
885  // is forced, then neither PIC nor PIE flags will have no effect.
886  if (!ToolChain.isPICDefaultForced()) {
887  if (LastPICArg) {
888  Option O = LastPICArg->getOption();
889  if (O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic) ||
890  O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie)) {
891  PIE = O.matches(options::OPT_fPIE) || O.matches(options::OPT_fpie);
892  PIC =
893  PIE || O.matches(options::OPT_fPIC) || O.matches(options::OPT_fpic);
894  IsPICLevelTwo =
895  O.matches(options::OPT_fPIE) || O.matches(options::OPT_fPIC);
896  } else {
897  PIE = PIC = false;
898  if (EffectiveTriple.isPS4CPU()) {
899  Arg *ModelArg = Args.getLastArg(options::OPT_mcmodel_EQ);
900  StringRef Model = ModelArg ? ModelArg->getValue() : "";
901  if (Model != "kernel") {
902  PIC = true;
903  ToolChain.getDriver().Diag(diag::warn_drv_ps4_force_pic)
904  << LastPICArg->getSpelling();
905  }
906  }
907  }
908  }
909  }
910 
911  // Introduce a Darwin and PS4-specific hack. If the default is PIC, but the
912  // PIC level would've been set to level 1, force it back to level 2 PIC
913  // instead.
914  if (PIC && (Triple.isOSDarwin() || EffectiveTriple.isPS4CPU()))
915  IsPICLevelTwo |= ToolChain.isPICDefault();
916 
917  // This kernel flags are a trump-card: they will disable PIC/PIE
918  // generation, independent of the argument order.
919  if (KernelOrKext &&
920  ((!EffectiveTriple.isiOS() || EffectiveTriple.isOSVersionLT(6)) &&
921  !EffectiveTriple.isWatchOS()))
922  PIC = PIE = false;
923 
924  if (Arg *A = Args.getLastArg(options::OPT_mdynamic_no_pic)) {
925  // This is a very special mode. It trumps the other modes, almost no one
926  // uses it, and it isn't even valid on any OS but Darwin.
927  if (!Triple.isOSDarwin())
928  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
929  << A->getSpelling() << Triple.str();
930 
931  // FIXME: Warn when this flag trumps some other PIC or PIE flag.
932 
933  // Only a forced PIC mode can cause the actual compile to have PIC defines
934  // etc., no flags are sufficient. This behavior was selected to closely
935  // match that of llvm-gcc and Apple GCC before that.
936  PIC = ToolChain.isPICDefault() && ToolChain.isPICDefaultForced();
937 
938  return std::make_tuple(llvm::Reloc::DynamicNoPIC, PIC ? 2U : 0U, false);
939  }
940 
941  bool EmbeddedPISupported;
942  switch (Triple.getArch()) {
943  case llvm::Triple::arm:
944  case llvm::Triple::armeb:
945  case llvm::Triple::thumb:
946  case llvm::Triple::thumbeb:
947  EmbeddedPISupported = true;
948  break;
949  default:
950  EmbeddedPISupported = false;
951  break;
952  }
953 
954  bool ROPI = false, RWPI = false;
955  Arg* LastROPIArg = Args.getLastArg(options::OPT_fropi, options::OPT_fno_ropi);
956  if (LastROPIArg && LastROPIArg->getOption().matches(options::OPT_fropi)) {
957  if (!EmbeddedPISupported)
958  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
959  << LastROPIArg->getSpelling() << Triple.str();
960  ROPI = true;
961  }
962  Arg *LastRWPIArg = Args.getLastArg(options::OPT_frwpi, options::OPT_fno_rwpi);
963  if (LastRWPIArg && LastRWPIArg->getOption().matches(options::OPT_frwpi)) {
964  if (!EmbeddedPISupported)
965  ToolChain.getDriver().Diag(diag::err_drv_unsupported_opt_for_target)
966  << LastRWPIArg->getSpelling() << Triple.str();
967  RWPI = true;
968  }
969 
970  // ROPI and RWPI are not comaptible with PIC or PIE.
971  if ((ROPI || RWPI) && (PIC || PIE))
972  ToolChain.getDriver().Diag(diag::err_drv_ropi_rwpi_incompatible_with_pic);
973 
974  // When targettng MIPS64 with N64, the default is PIC, unless -mno-abicalls is
975  // used.
976  if ((Triple.getArch() == llvm::Triple::mips64 ||
977  Triple.getArch() == llvm::Triple::mips64el) &&
978  Args.hasArg(options::OPT_mno_abicalls))
979  return std::make_tuple(llvm::Reloc::Static, 0U, false);
980 
981  if (PIC)
982  return std::make_tuple(llvm::Reloc::PIC_, IsPICLevelTwo ? 2U : 1U, PIE);
983 
984  llvm::Reloc::Model RelocM = llvm::Reloc::Static;
985  if (ROPI && RWPI)
986  RelocM = llvm::Reloc::ROPI_RWPI;
987  else if (ROPI)
988  RelocM = llvm::Reloc::ROPI;
989  else if (RWPI)
990  RelocM = llvm::Reloc::RWPI;
991 
992  return std::make_tuple(RelocM, 0U, false);
993 }
994 
995 void tools::AddAssemblerKPIC(const ToolChain &ToolChain, const ArgList &Args,
996  ArgStringList &CmdArgs) {
997  llvm::Reloc::Model RelocationModel;
998  unsigned PICLevel;
999  bool IsPIE;
1000  std::tie(RelocationModel, PICLevel, IsPIE) = ParsePICArgs(ToolChain, Args);
1001 
1002  if (RelocationModel != llvm::Reloc::Static)
1003  CmdArgs.push_back("-KPIC");
1004 }
1005 
1006 /// \brief Determine whether Objective-C automated reference counting is
1007 /// enabled.
1008 bool tools::isObjCAutoRefCount(const ArgList &Args) {
1009  return Args.hasFlag(options::OPT_fobjc_arc, options::OPT_fno_objc_arc, false);
1010 }
1011 
1012 static void AddLibgcc(const llvm::Triple &Triple, const Driver &D,
1013  ArgStringList &CmdArgs, const ArgList &Args) {
1014  bool isAndroid = Triple.isAndroid();
1015  bool isCygMing = Triple.isOSCygMing();
1016  bool IsIAMCU = Triple.isOSIAMCU();
1017  bool StaticLibgcc = Args.hasArg(options::OPT_static_libgcc) ||
1018  Args.hasArg(options::OPT_static);
1019  if (!D.CCCIsCXX())
1020  CmdArgs.push_back("-lgcc");
1021 
1022  if (StaticLibgcc || isAndroid) {
1023  if (D.CCCIsCXX())
1024  CmdArgs.push_back("-lgcc");
1025  } else {
1026  if (!D.CCCIsCXX() && !isCygMing)
1027  CmdArgs.push_back("--as-needed");
1028  CmdArgs.push_back("-lgcc_s");
1029  if (!D.CCCIsCXX() && !isCygMing)
1030  CmdArgs.push_back("--no-as-needed");
1031  }
1032 
1033  if (StaticLibgcc && !isAndroid && !IsIAMCU)
1034  CmdArgs.push_back("-lgcc_eh");
1035  else if (!Args.hasArg(options::OPT_shared) && D.CCCIsCXX())
1036  CmdArgs.push_back("-lgcc");
1037 
1038  // According to Android ABI, we have to link with libdl if we are
1039  // linking with non-static libgcc.
1040  //
1041  // NOTE: This fixes a link error on Android MIPS as well. The non-static
1042  // libgcc for MIPS relies on _Unwind_Find_FDE and dl_iterate_phdr from libdl.
1043  if (isAndroid && !StaticLibgcc)
1044  CmdArgs.push_back("-ldl");
1045 }
1046 
1047 void tools::AddRunTimeLibs(const ToolChain &TC, const Driver &D,
1048  ArgStringList &CmdArgs, const ArgList &Args) {
1049  // Make use of compiler-rt if --rtlib option is used
1051 
1052  switch (RLT) {
1054  CmdArgs.push_back(TC.getCompilerRTArgString(Args, "builtins"));
1055  break;
1056  case ToolChain::RLT_Libgcc:
1057  // Make sure libgcc is not used under MSVC environment by default
1058  if (TC.getTriple().isKnownWindowsMSVCEnvironment()) {
1059  // Issue error diagnostic if libgcc is explicitly specified
1060  // through command line as --rtlib option argument.
1061  if (Args.hasArg(options::OPT_rtlib_EQ)) {
1062  TC.getDriver().Diag(diag::err_drv_unsupported_rtlib_for_platform)
1063  << Args.getLastArg(options::OPT_rtlib_EQ)->getValue() << "MSVC";
1064  }
1065  } else
1066  AddLibgcc(TC.getTriple(), D, CmdArgs, Args);
1067  break;
1068  }
1069 }
1070 
1071 /// Add OpenMP linker script arguments at the end of the argument list so that
1072 /// the fat binary is built by embedding each of the device images into the
1073 /// host. The linker script also defines a few symbols required by the code
1074 /// generation so that the images can be easily retrieved at runtime by the
1075 /// offloading library. This should be used only in tool chains that support
1076 /// linker scripts.
1077 void tools::AddOpenMPLinkerScript(const ToolChain &TC, Compilation &C,
1078  const InputInfo &Output,
1079  const InputInfoList &Inputs,
1080  const ArgList &Args, ArgStringList &CmdArgs,
1081  const JobAction &JA) {
1082 
1083  // If this is not an OpenMP host toolchain, we don't need to do anything.
1085  return;
1086 
1087  // Create temporary linker script. Keep it if save-temps is enabled.
1088  const char *LKS;
1089  SmallString<256> Name = llvm::sys::path::filename(Output.getFilename());
1090  if (C.getDriver().isSaveTempsEnabled()) {
1091  llvm::sys::path::replace_extension(Name, "lk");
1092  LKS = C.getArgs().MakeArgString(Name.c_str());
1093  } else {
1094  llvm::sys::path::replace_extension(Name, "");
1095  Name = C.getDriver().GetTemporaryPath(Name, "lk");
1096  LKS = C.addTempFile(C.getArgs().MakeArgString(Name.c_str()));
1097  }
1098 
1099  // Add linker script option to the command.
1100  CmdArgs.push_back("-T");
1101  CmdArgs.push_back(LKS);
1102 
1103  // Create a buffer to write the contents of the linker script.
1104  std::string LksBuffer;
1105  llvm::raw_string_ostream LksStream(LksBuffer);
1106 
1107  // Get the OpenMP offload tool chains so that we can extract the triple
1108  // associated with each device input.
1109  auto OpenMPToolChains = C.getOffloadToolChains<Action::OFK_OpenMP>();
1110  assert(OpenMPToolChains.first != OpenMPToolChains.second &&
1111  "No OpenMP toolchains??");
1112 
1113  // Track the input file name and device triple in order to build the script,
1114  // inserting binaries in the designated sections.
1116 
1117  // Add commands to embed target binaries. We ensure that each section and
1118  // image is 16-byte aligned. This is not mandatory, but increases the
1119  // likelihood of data to be aligned with a cache block in several main host
1120  // machines.
1121  LksStream << "/*\n";
1122  LksStream << " OpenMP Offload Linker Script\n";
1123  LksStream << " *** Automatically generated by Clang ***\n";
1124  LksStream << "*/\n";
1125  LksStream << "TARGET(binary)\n";
1126  auto DTC = OpenMPToolChains.first;
1127  for (auto &II : Inputs) {
1128  const Action *A = II.getAction();
1129  // Is this a device linking action?
1130  if (A && isa<LinkJobAction>(A) &&
1132  assert(DTC != OpenMPToolChains.second &&
1133  "More device inputs than device toolchains??");
1134  InputBinaryInfo.push_back(std::make_pair(
1135  DTC->second->getTriple().normalize(), II.getFilename()));
1136  ++DTC;
1137  LksStream << "INPUT(" << II.getFilename() << ")\n";
1138  }
1139  }
1140 
1141  assert(DTC == OpenMPToolChains.second &&
1142  "Less device inputs than device toolchains??");
1143 
1144  LksStream << "SECTIONS\n";
1145  LksStream << "{\n";
1146 
1147  // Put each target binary into a separate section.
1148  for (const auto &BI : InputBinaryInfo) {
1149  LksStream << " .omp_offloading." << BI.first << " :\n";
1150  LksStream << " ALIGN(0x10)\n";
1151  LksStream << " {\n";
1152  LksStream << " PROVIDE_HIDDEN(.omp_offloading.img_start." << BI.first
1153  << " = .);\n";
1154  LksStream << " " << BI.second << "\n";
1155  LksStream << " PROVIDE_HIDDEN(.omp_offloading.img_end." << BI.first
1156  << " = .);\n";
1157  LksStream << " }\n";
1158  }
1159 
1160  // Add commands to define host entries begin and end. We use 1-byte subalign
1161  // so that the linker does not add any padding and the elements in this
1162  // section form an array.
1163  LksStream << " .omp_offloading.entries :\n";
1164  LksStream << " ALIGN(0x10)\n";
1165  LksStream << " SUBALIGN(0x01)\n";
1166  LksStream << " {\n";
1167  LksStream << " PROVIDE_HIDDEN(.omp_offloading.entries_begin = .);\n";
1168  LksStream << " *(.omp_offloading.entries)\n";
1169  LksStream << " PROVIDE_HIDDEN(.omp_offloading.entries_end = .);\n";
1170  LksStream << " }\n";
1171  LksStream << "}\n";
1172  LksStream << "INSERT BEFORE .data\n";
1173  LksStream.flush();
1174 
1175  // Dump the contents of the linker script if the user requested that. We
1176  // support this option to enable testing of behavior with -###.
1177  if (C.getArgs().hasArg(options::OPT_fopenmp_dump_offload_linker_script))
1178  llvm::errs() << LksBuffer;
1179 
1180  // If this is a dry run, do not create the linker script file.
1181  if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH))
1182  return;
1183 
1184  // Open script file and write the contents.
1185  std::error_code EC;
1186  llvm::raw_fd_ostream Lksf(LKS, EC, llvm::sys::fs::F_None);
1187 
1188  if (EC) {
1189  C.getDriver().Diag(clang::diag::err_unable_to_make_temp) << EC.message();
1190  return;
1191  }
1192 
1193  Lksf << LksBuffer;
1194 }
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:509
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:756
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:4048
const char * getCompilerRTArgString(const llvm::opt::ArgList &Args, StringRef Component, bool Shared=false) const
Definition: ToolChain.cpp:365
bool isUseSeparateSections(const llvm::Triple &Triple)
Definition: CommonArgs.cpp:367
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:506
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:522
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:347
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:444
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:635
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:371
std::string GetProgramPath(const char *Name) const
Definition: ToolChain.cpp:404
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:448
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:560
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:732
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:73