1 //===--- Driver.cpp - Clang GCC Compatible Driver -------------------------===// 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 #ifdef HAVE_CLANG_CONFIG_H 11 # include "clang/Config/config.h" 12 #endif 13 14 #include "clang/Driver/Driver.h" 15 16 #include "clang/Driver/Action.h" 17 #include "clang/Driver/Arg.h" 18 #include "clang/Driver/ArgList.h" 19 #include "clang/Driver/Compilation.h" 20 #include "clang/Driver/DriverDiagnostic.h" 21 #include "clang/Driver/HostInfo.h" 22 #include "clang/Driver/Job.h" 23 #include "clang/Driver/OptTable.h" 24 #include "clang/Driver/Option.h" 25 #include "clang/Driver/Options.h" 26 #include "clang/Driver/Tool.h" 27 #include "clang/Driver/ToolChain.h" 28 29 #include "clang/Basic/Version.h" 30 31 #include "llvm/Config/config.h" 32 #include "llvm/ADT/ArrayRef.h" 33 #include "llvm/ADT/StringSet.h" 34 #include "llvm/ADT/OwningPtr.h" 35 #include "llvm/Support/ErrorHandling.h" 36 #include "llvm/Support/PrettyStackTrace.h" 37 #include "llvm/Support/raw_ostream.h" 38 #include "llvm/Support/FileSystem.h" 39 #include "llvm/Support/Path.h" 40 #include "llvm/Support/Program.h" 41 42 #include "InputInfo.h" 43 44 #include <map> 45 46 using namespace clang::driver; 47 using namespace clang; 48 49 Driver::Driver(StringRef ClangExecutable, 50 StringRef DefaultHostTriple, 51 StringRef DefaultImageName, 52 bool IsProduction, 53 DiagnosticsEngine &Diags) 54 : Opts(createDriverOptTable()), Diags(Diags), 55 ClangExecutable(ClangExecutable), UseStdLib(true), 56 DefaultHostTriple(DefaultHostTriple), DefaultImageName(DefaultImageName), 57 DriverTitle("clang \"gcc-compatible\" driver"), 58 Host(0), 59 CCPrintOptionsFilename(0), CCPrintHeadersFilename(0), 60 CCLogDiagnosticsFilename(0), CCCIsCXX(false), 61 CCCIsCPP(false),CCCEcho(false), CCCPrintBindings(false), 62 CCPrintOptions(false), CCPrintHeaders(false), CCLogDiagnostics(false), 63 CCGenDiagnostics(false), CCCGenericGCCName(""), CheckInputsExist(true), 64 CCCUseClang(true), CCCUseClangCXX(true), CCCUseClangCPP(true), 65 CCCUsePCH(true), SuppressMissingInputWarning(false) { 66 if (IsProduction) { 67 // In a "production" build, only use clang on architectures we expect to 68 // work, and don't use clang C++. 69 // 70 // During development its more convenient to always have the driver use 71 // clang, but we don't want users to be confused when things don't work, or 72 // to file bugs for things we don't support. 73 CCCClangArchs.insert(llvm::Triple::x86); 74 CCCClangArchs.insert(llvm::Triple::x86_64); 75 CCCClangArchs.insert(llvm::Triple::arm); 76 } 77 78 Name = llvm::sys::path::stem(ClangExecutable); 79 Dir = llvm::sys::path::parent_path(ClangExecutable); 80 81 // Compute the path to the resource directory. 82 StringRef ClangResourceDir(CLANG_RESOURCE_DIR); 83 llvm::SmallString<128> P(Dir); 84 if (ClangResourceDir != "") 85 llvm::sys::path::append(P, ClangResourceDir); 86 else 87 llvm::sys::path::append(P, "..", "lib", "clang", CLANG_VERSION_STRING); 88 ResourceDir = P.str(); 89 } 90 91 Driver::~Driver() { 92 delete Opts; 93 delete Host; 94 } 95 96 InputArgList *Driver::ParseArgStrings(ArrayRef<const char *> ArgList) { 97 llvm::PrettyStackTraceString CrashInfo("Command line argument parsing"); 98 unsigned MissingArgIndex, MissingArgCount; 99 InputArgList *Args = getOpts().ParseArgs(ArgList.begin(), ArgList.end(), 100 MissingArgIndex, MissingArgCount); 101 102 // Check for missing argument error. 103 if (MissingArgCount) 104 Diag(clang::diag::err_drv_missing_argument) 105 << Args->getArgString(MissingArgIndex) << MissingArgCount; 106 107 // Check for unsupported options. 108 for (ArgList::const_iterator it = Args->begin(), ie = Args->end(); 109 it != ie; ++it) { 110 Arg *A = *it; 111 if (A->getOption().isUnsupported()) { 112 Diag(clang::diag::err_drv_unsupported_opt) << A->getAsString(*Args); 113 continue; 114 } 115 } 116 117 return Args; 118 } 119 120 // Determine which compilation mode we are in. We look for options which 121 // affect the phase, starting with the earliest phases, and record which 122 // option we used to determine the final phase. 123 phases::ID Driver::getFinalPhase(const DerivedArgList &DAL, Arg **FinalPhaseArg) 124 const { 125 Arg *PhaseArg = 0; 126 phases::ID FinalPhase; 127 128 // -{E,M,MM} only run the preprocessor. 129 if (CCCIsCPP || 130 (PhaseArg = DAL.getLastArg(options::OPT_E)) || 131 (PhaseArg = DAL.getLastArg(options::OPT_M, options::OPT_MM))) { 132 FinalPhase = phases::Preprocess; 133 134 // -{fsyntax-only,-analyze,emit-ast,S} only run up to the compiler. 135 } else if ((PhaseArg = DAL.getLastArg(options::OPT_fsyntax_only)) || 136 (PhaseArg = DAL.getLastArg(options::OPT_rewrite_objc)) || 137 (PhaseArg = DAL.getLastArg(options::OPT__analyze, 138 options::OPT__analyze_auto)) || 139 (PhaseArg = DAL.getLastArg(options::OPT_emit_ast)) || 140 (PhaseArg = DAL.getLastArg(options::OPT_S))) { 141 FinalPhase = phases::Compile; 142 143 // -c only runs up to the assembler. 144 } else if ((PhaseArg = DAL.getLastArg(options::OPT_c))) { 145 FinalPhase = phases::Assemble; 146 147 // Otherwise do everything. 148 } else 149 FinalPhase = phases::Link; 150 151 if (FinalPhaseArg) 152 *FinalPhaseArg = PhaseArg; 153 154 return FinalPhase; 155 } 156 157 DerivedArgList *Driver::TranslateInputArgs(const InputArgList &Args) const { 158 DerivedArgList *DAL = new DerivedArgList(Args); 159 160 bool HasNostdlib = Args.hasArg(options::OPT_nostdlib); 161 for (ArgList::const_iterator it = Args.begin(), 162 ie = Args.end(); it != ie; ++it) { 163 const Arg *A = *it; 164 165 // Unfortunately, we have to parse some forwarding options (-Xassembler, 166 // -Xlinker, -Xpreprocessor) because we either integrate their functionality 167 // (assembler and preprocessor), or bypass a previous driver ('collect2'). 168 169 // Rewrite linker options, to replace --no-demangle with a custom internal 170 // option. 171 if ((A->getOption().matches(options::OPT_Wl_COMMA) || 172 A->getOption().matches(options::OPT_Xlinker)) && 173 A->containsValue("--no-demangle")) { 174 // Add the rewritten no-demangle argument. 175 DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_Xlinker__no_demangle)); 176 177 // Add the remaining values as Xlinker arguments. 178 for (unsigned i = 0, e = A->getNumValues(); i != e; ++i) 179 if (StringRef(A->getValue(Args, i)) != "--no-demangle") 180 DAL->AddSeparateArg(A, Opts->getOption(options::OPT_Xlinker), 181 A->getValue(Args, i)); 182 183 continue; 184 } 185 186 // Rewrite preprocessor options, to replace -Wp,-MD,FOO which is used by 187 // some build systems. We don't try to be complete here because we don't 188 // care to encourage this usage model. 189 if (A->getOption().matches(options::OPT_Wp_COMMA) && 190 A->getNumValues() == 2 && 191 (A->getValue(Args, 0) == StringRef("-MD") || 192 A->getValue(Args, 0) == StringRef("-MMD"))) { 193 // Rewrite to -MD/-MMD along with -MF. 194 if (A->getValue(Args, 0) == StringRef("-MD")) 195 DAL->AddFlagArg(A, Opts->getOption(options::OPT_MD)); 196 else 197 DAL->AddFlagArg(A, Opts->getOption(options::OPT_MMD)); 198 DAL->AddSeparateArg(A, Opts->getOption(options::OPT_MF), 199 A->getValue(Args, 1)); 200 continue; 201 } 202 203 // Rewrite reserved library names. 204 if (A->getOption().matches(options::OPT_l)) { 205 StringRef Value = A->getValue(Args); 206 207 // Rewrite unless -nostdlib is present. 208 if (!HasNostdlib && Value == "stdc++") { 209 DAL->AddFlagArg(A, Opts->getOption( 210 options::OPT_Z_reserved_lib_stdcxx)); 211 continue; 212 } 213 214 // Rewrite unconditionally. 215 if (Value == "cc_kext") { 216 DAL->AddFlagArg(A, Opts->getOption( 217 options::OPT_Z_reserved_lib_cckext)); 218 continue; 219 } 220 } 221 222 DAL->append(*it); 223 } 224 225 // Add a default value of -mlinker-version=, if one was given and the user 226 // didn't specify one. 227 #if defined(HOST_LINK_VERSION) 228 if (!Args.hasArg(options::OPT_mlinker_version_EQ)) { 229 DAL->AddJoinedArg(0, Opts->getOption(options::OPT_mlinker_version_EQ), 230 HOST_LINK_VERSION); 231 DAL->getLastArg(options::OPT_mlinker_version_EQ)->claim(); 232 } 233 #endif 234 235 return DAL; 236 } 237 238 Compilation *Driver::BuildCompilation(ArrayRef<const char *> ArgList) { 239 llvm::PrettyStackTraceString CrashInfo("Compilation construction"); 240 241 // FIXME: Handle environment options which affect driver behavior, somewhere 242 // (client?). GCC_EXEC_PREFIX, LIBRARY_PATH, LPATH, CC_PRINT_OPTIONS. 243 244 if (char *env = ::getenv("COMPILER_PATH")) { 245 StringRef CompilerPath = env; 246 while (!CompilerPath.empty()) { 247 std::pair<StringRef, StringRef> Split = CompilerPath.split(':'); 248 PrefixDirs.push_back(Split.first); 249 CompilerPath = Split.second; 250 } 251 } 252 253 // FIXME: What are we going to do with -V and -b? 254 255 // FIXME: This stuff needs to go into the Compilation, not the driver. 256 bool CCCPrintOptions = false, CCCPrintActions = false; 257 258 InputArgList *Args = ParseArgStrings(ArgList.slice(1)); 259 260 // -no-canonical-prefixes is used very early in main. 261 Args->ClaimAllArgs(options::OPT_no_canonical_prefixes); 262 263 // Ignore -pipe. 264 Args->ClaimAllArgs(options::OPT_pipe); 265 266 // Extract -ccc args. 267 // 268 // FIXME: We need to figure out where this behavior should live. Most of it 269 // should be outside in the client; the parts that aren't should have proper 270 // options, either by introducing new ones or by overloading gcc ones like -V 271 // or -b. 272 CCCPrintOptions = Args->hasArg(options::OPT_ccc_print_options); 273 CCCPrintActions = Args->hasArg(options::OPT_ccc_print_phases); 274 CCCPrintBindings = Args->hasArg(options::OPT_ccc_print_bindings); 275 CCCIsCXX = Args->hasArg(options::OPT_ccc_cxx) || CCCIsCXX; 276 CCCEcho = Args->hasArg(options::OPT_ccc_echo); 277 if (const Arg *A = Args->getLastArg(options::OPT_ccc_gcc_name)) 278 CCCGenericGCCName = A->getValue(*Args); 279 CCCUseClangCXX = Args->hasFlag(options::OPT_ccc_clang_cxx, 280 options::OPT_ccc_no_clang_cxx, 281 CCCUseClangCXX); 282 CCCUsePCH = Args->hasFlag(options::OPT_ccc_pch_is_pch, 283 options::OPT_ccc_pch_is_pth); 284 CCCUseClang = !Args->hasArg(options::OPT_ccc_no_clang); 285 CCCUseClangCPP = !Args->hasArg(options::OPT_ccc_no_clang_cpp); 286 if (const Arg *A = Args->getLastArg(options::OPT_ccc_clang_archs)) { 287 StringRef Cur = A->getValue(*Args); 288 289 CCCClangArchs.clear(); 290 while (!Cur.empty()) { 291 std::pair<StringRef, StringRef> Split = Cur.split(','); 292 293 if (!Split.first.empty()) { 294 llvm::Triple::ArchType Arch = 295 llvm::Triple(Split.first, "", "").getArch(); 296 297 if (Arch == llvm::Triple::UnknownArch) 298 Diag(clang::diag::err_drv_invalid_arch_name) << Split.first; 299 300 CCCClangArchs.insert(Arch); 301 } 302 303 Cur = Split.second; 304 } 305 } 306 // FIXME: We shouldn't overwrite the default host triple here, but we have 307 // nowhere else to put this currently. 308 if (const Arg *A = Args->getLastArg(options::OPT_ccc_host_triple)) 309 DefaultHostTriple = A->getValue(*Args); 310 if (const Arg *A = Args->getLastArg(options::OPT_ccc_install_dir)) 311 Dir = InstalledDir = A->getValue(*Args); 312 for (arg_iterator it = Args->filtered_begin(options::OPT_B), 313 ie = Args->filtered_end(); it != ie; ++it) { 314 const Arg *A = *it; 315 A->claim(); 316 PrefixDirs.push_back(A->getValue(*Args, 0)); 317 } 318 if (const Arg *A = Args->getLastArg(options::OPT__sysroot_EQ)) 319 SysRoot = A->getValue(*Args); 320 if (Args->hasArg(options::OPT_nostdlib)) 321 UseStdLib = false; 322 323 Host = GetHostInfo(DefaultHostTriple.c_str()); 324 325 // Perform the default argument translations. 326 DerivedArgList *TranslatedArgs = TranslateInputArgs(*Args); 327 328 // The compilation takes ownership of Args. 329 Compilation *C = new Compilation(*this, *Host->CreateToolChain(*Args), Args, 330 TranslatedArgs); 331 332 // FIXME: This behavior shouldn't be here. 333 if (CCCPrintOptions) { 334 PrintOptions(C->getInputArgs()); 335 return C; 336 } 337 338 if (!HandleImmediateArgs(*C)) 339 return C; 340 341 // Construct the list of inputs. 342 InputList Inputs; 343 BuildInputs(C->getDefaultToolChain(), C->getArgs(), Inputs); 344 345 // Construct the list of abstract actions to perform for this compilation. 346 if (Host->useDriverDriver()) 347 BuildUniversalActions(C->getDefaultToolChain(), C->getArgs(), 348 Inputs, C->getActions()); 349 else 350 BuildActions(C->getDefaultToolChain(), C->getArgs(), Inputs, 351 C->getActions()); 352 353 if (CCCPrintActions) { 354 PrintActions(*C); 355 return C; 356 } 357 358 BuildJobs(*C); 359 360 return C; 361 } 362 363 // When clang crashes, produce diagnostic information including the fully 364 // preprocessed source file(s). Request that the developer attach the 365 // diagnostic information to a bug report. 366 void Driver::generateCompilationDiagnostics(Compilation &C, 367 const Command *FailingCommand) { 368 Diag(clang::diag::note_drv_command_failed_diag_msg) 369 << "Please submit a bug report to " BUG_REPORT_URL " and include command" 370 " line arguments and all diagnostic information."; 371 372 // Suppress driver output and emit preprocessor output to temp file. 373 CCCIsCPP = true; 374 CCGenDiagnostics = true; 375 376 // Clear stale state and suppress tool output. 377 C.initCompilationForDiagnostics(); 378 Diags.Reset(); 379 380 // Construct the list of inputs. 381 InputList Inputs; 382 BuildInputs(C.getDefaultToolChain(), C.getArgs(), Inputs); 383 384 for (InputList::iterator it = Inputs.begin(), ie = Inputs.end(); it != ie;) { 385 bool IgnoreInput = false; 386 387 // Ignore input from stdin or any inputs that cannot be preprocessed. 388 if (!strcmp(it->second->getValue(C.getArgs()), "-")) { 389 Diag(clang::diag::note_drv_command_failed_diag_msg) 390 << "Error generating preprocessed source(s) - ignoring input from stdin" 391 "."; 392 IgnoreInput = true; 393 } else if (types::getPreprocessedType(it->first) == types::TY_INVALID) { 394 IgnoreInput = true; 395 } 396 397 if (IgnoreInput) { 398 it = Inputs.erase(it); 399 ie = Inputs.end(); 400 } else { 401 ++it; 402 } 403 } 404 405 // Don't attempt to generate preprocessed files if multiple -arch options are 406 // used. 407 int Archs = 0; 408 for (ArgList::const_iterator it = C.getArgs().begin(), ie = C.getArgs().end(); 409 it != ie; ++it) { 410 Arg *A = *it; 411 if (A->getOption().matches(options::OPT_arch)) { 412 Archs++; 413 if (Archs > 1) { 414 Diag(clang::diag::note_drv_command_failed_diag_msg) 415 << "Error generating preprocessed source(s) - cannot generate " 416 "preprocessed source with multiple -arch options."; 417 return; 418 } 419 } 420 } 421 422 if (Inputs.empty()) { 423 Diag(clang::diag::note_drv_command_failed_diag_msg) 424 << "Error generating preprocessed source(s) - no preprocessable inputs."; 425 return; 426 } 427 428 // Construct the list of abstract actions to perform for this compilation. 429 if (Host->useDriverDriver()) 430 BuildUniversalActions(C.getDefaultToolChain(), C.getArgs(), 431 Inputs, C.getActions()); 432 else 433 BuildActions(C.getDefaultToolChain(), C.getArgs(), Inputs, 434 C.getActions()); 435 436 BuildJobs(C); 437 438 // If there were errors building the compilation, quit now. 439 if (Diags.hasErrorOccurred()) { 440 Diag(clang::diag::note_drv_command_failed_diag_msg) 441 << "Error generating preprocessed source(s)."; 442 return; 443 } 444 445 // Generate preprocessed output. 446 FailingCommand = 0; 447 int Res = C.ExecuteJob(C.getJobs(), FailingCommand); 448 449 // If the command succeeded, we are done. 450 if (Res == 0) { 451 Diag(clang::diag::note_drv_command_failed_diag_msg) 452 << "Preprocessed source(s) are located at:"; 453 ArgStringList Files = C.getTempFiles(); 454 for (ArgStringList::const_iterator it = Files.begin(), ie = Files.end(); 455 it != ie; ++it) 456 Diag(clang::diag::note_drv_command_failed_diag_msg) << *it; 457 } else { 458 // Failure, remove preprocessed files. 459 if (!C.getArgs().hasArg(options::OPT_save_temps)) 460 C.CleanupFileList(C.getTempFiles(), true); 461 462 Diag(clang::diag::note_drv_command_failed_diag_msg) 463 << "Error generating preprocessed source(s)."; 464 } 465 } 466 467 int Driver::ExecuteCompilation(const Compilation &C, 468 const Command *&FailingCommand) const { 469 // Just print if -### was present. 470 if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) { 471 C.PrintJob(llvm::errs(), C.getJobs(), "\n", true); 472 return 0; 473 } 474 475 // If there were errors building the compilation, quit now. 476 if (Diags.hasErrorOccurred()) 477 return 1; 478 479 int Res = C.ExecuteJob(C.getJobs(), FailingCommand); 480 481 // Remove temp files. 482 C.CleanupFileList(C.getTempFiles()); 483 484 // If the command succeeded, we are done. 485 if (Res == 0) 486 return Res; 487 488 // Otherwise, remove result files as well. 489 if (!C.getArgs().hasArg(options::OPT_save_temps)) 490 C.CleanupFileList(C.getResultFiles(), true); 491 492 // Print extra information about abnormal failures, if possible. 493 // 494 // This is ad-hoc, but we don't want to be excessively noisy. If the result 495 // status was 1, assume the command failed normally. In particular, if it was 496 // the compiler then assume it gave a reasonable error code. Failures in other 497 // tools are less common, and they generally have worse diagnostics, so always 498 // print the diagnostic there. 499 const Tool &FailingTool = FailingCommand->getCreator(); 500 501 if (!FailingCommand->getCreator().hasGoodDiagnostics() || Res != 1) { 502 // FIXME: See FIXME above regarding result code interpretation. 503 if (Res < 0) 504 Diag(clang::diag::err_drv_command_signalled) 505 << FailingTool.getShortName() << -Res; 506 else 507 Diag(clang::diag::err_drv_command_failed) 508 << FailingTool.getShortName() << Res; 509 } 510 511 return Res; 512 } 513 514 void Driver::PrintOptions(const ArgList &Args) const { 515 unsigned i = 0; 516 for (ArgList::const_iterator it = Args.begin(), ie = Args.end(); 517 it != ie; ++it, ++i) { 518 Arg *A = *it; 519 llvm::errs() << "Option " << i << " - " 520 << "Name: \"" << A->getOption().getName() << "\", " 521 << "Values: {"; 522 for (unsigned j = 0; j < A->getNumValues(); ++j) { 523 if (j) 524 llvm::errs() << ", "; 525 llvm::errs() << '"' << A->getValue(Args, j) << '"'; 526 } 527 llvm::errs() << "}\n"; 528 } 529 } 530 531 void Driver::PrintHelp(bool ShowHidden) const { 532 getOpts().PrintHelp(llvm::outs(), Name.c_str(), DriverTitle.c_str(), 533 ShowHidden); 534 } 535 536 void Driver::PrintVersion(const Compilation &C, raw_ostream &OS) const { 537 // FIXME: The following handlers should use a callback mechanism, we don't 538 // know what the client would like to do. 539 OS << getClangFullVersion() << '\n'; 540 const ToolChain &TC = C.getDefaultToolChain(); 541 OS << "Target: " << TC.getTripleString() << '\n'; 542 543 // Print the threading model. 544 // 545 // FIXME: Implement correctly. 546 OS << "Thread model: " << "posix" << '\n'; 547 } 548 549 /// PrintDiagnosticCategories - Implement the --print-diagnostic-categories 550 /// option. 551 static void PrintDiagnosticCategories(raw_ostream &OS) { 552 // Skip the empty category. 553 for (unsigned i = 1, max = DiagnosticIDs::getNumberOfCategories(); 554 i != max; ++i) 555 OS << i << ',' << DiagnosticIDs::getCategoryNameFromID(i) << '\n'; 556 } 557 558 bool Driver::HandleImmediateArgs(const Compilation &C) { 559 // The order these options are handled in gcc is all over the place, but we 560 // don't expect inconsistencies w.r.t. that to matter in practice. 561 562 if (C.getArgs().hasArg(options::OPT_dumpmachine)) { 563 llvm::outs() << C.getDefaultToolChain().getTripleString() << '\n'; 564 return false; 565 } 566 567 if (C.getArgs().hasArg(options::OPT_dumpversion)) { 568 // Since -dumpversion is only implemented for pedantic GCC compatibility, we 569 // return an answer which matches our definition of __VERSION__. 570 // 571 // If we want to return a more correct answer some day, then we should 572 // introduce a non-pedantically GCC compatible mode to Clang in which we 573 // provide sensible definitions for -dumpversion, __VERSION__, etc. 574 llvm::outs() << "4.2.1\n"; 575 return false; 576 } 577 578 if (C.getArgs().hasArg(options::OPT__print_diagnostic_categories)) { 579 PrintDiagnosticCategories(llvm::outs()); 580 return false; 581 } 582 583 if (C.getArgs().hasArg(options::OPT__help) || 584 C.getArgs().hasArg(options::OPT__help_hidden)) { 585 PrintHelp(C.getArgs().hasArg(options::OPT__help_hidden)); 586 return false; 587 } 588 589 if (C.getArgs().hasArg(options::OPT__version)) { 590 // Follow gcc behavior and use stdout for --version and stderr for -v. 591 PrintVersion(C, llvm::outs()); 592 return false; 593 } 594 595 if (C.getArgs().hasArg(options::OPT_v) || 596 C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) { 597 PrintVersion(C, llvm::errs()); 598 SuppressMissingInputWarning = true; 599 } 600 601 const ToolChain &TC = C.getDefaultToolChain(); 602 if (C.getArgs().hasArg(options::OPT_print_search_dirs)) { 603 llvm::outs() << "programs: ="; 604 for (ToolChain::path_list::const_iterator it = TC.getProgramPaths().begin(), 605 ie = TC.getProgramPaths().end(); it != ie; ++it) { 606 if (it != TC.getProgramPaths().begin()) 607 llvm::outs() << ':'; 608 llvm::outs() << *it; 609 } 610 llvm::outs() << "\n"; 611 llvm::outs() << "libraries: =" << ResourceDir; 612 613 std::string sysroot; 614 if (Arg *A = C.getArgs().getLastArg(options::OPT__sysroot_EQ)) 615 sysroot = A->getValue(C.getArgs()); 616 617 for (ToolChain::path_list::const_iterator it = TC.getFilePaths().begin(), 618 ie = TC.getFilePaths().end(); it != ie; ++it) { 619 llvm::outs() << ':'; 620 const char *path = it->c_str(); 621 if (path[0] == '=') 622 llvm::outs() << sysroot << path + 1; 623 else 624 llvm::outs() << path; 625 } 626 llvm::outs() << "\n"; 627 return false; 628 } 629 630 // FIXME: The following handlers should use a callback mechanism, we don't 631 // know what the client would like to do. 632 if (Arg *A = C.getArgs().getLastArg(options::OPT_print_file_name_EQ)) { 633 llvm::outs() << GetFilePath(A->getValue(C.getArgs()), TC) << "\n"; 634 return false; 635 } 636 637 if (Arg *A = C.getArgs().getLastArg(options::OPT_print_prog_name_EQ)) { 638 llvm::outs() << GetProgramPath(A->getValue(C.getArgs()), TC) << "\n"; 639 return false; 640 } 641 642 if (C.getArgs().hasArg(options::OPT_print_libgcc_file_name)) { 643 llvm::outs() << GetFilePath("libgcc.a", TC) << "\n"; 644 return false; 645 } 646 647 if (C.getArgs().hasArg(options::OPT_print_multi_lib)) { 648 // FIXME: We need tool chain support for this. 649 llvm::outs() << ".;\n"; 650 651 switch (C.getDefaultToolChain().getTriple().getArch()) { 652 default: 653 break; 654 655 case llvm::Triple::x86_64: 656 llvm::outs() << "x86_64;@m64" << "\n"; 657 break; 658 659 case llvm::Triple::ppc64: 660 llvm::outs() << "ppc64;@m64" << "\n"; 661 break; 662 } 663 return false; 664 } 665 666 // FIXME: What is the difference between print-multi-directory and 667 // print-multi-os-directory? 668 if (C.getArgs().hasArg(options::OPT_print_multi_directory) || 669 C.getArgs().hasArg(options::OPT_print_multi_os_directory)) { 670 switch (C.getDefaultToolChain().getTriple().getArch()) { 671 default: 672 case llvm::Triple::x86: 673 case llvm::Triple::ppc: 674 llvm::outs() << "." << "\n"; 675 break; 676 677 case llvm::Triple::x86_64: 678 llvm::outs() << "x86_64" << "\n"; 679 break; 680 681 case llvm::Triple::ppc64: 682 llvm::outs() << "ppc64" << "\n"; 683 break; 684 } 685 return false; 686 } 687 688 return true; 689 } 690 691 static unsigned PrintActions1(const Compilation &C, Action *A, 692 std::map<Action*, unsigned> &Ids) { 693 if (Ids.count(A)) 694 return Ids[A]; 695 696 std::string str; 697 llvm::raw_string_ostream os(str); 698 699 os << Action::getClassName(A->getKind()) << ", "; 700 if (InputAction *IA = dyn_cast<InputAction>(A)) { 701 os << "\"" << IA->getInputArg().getValue(C.getArgs()) << "\""; 702 } else if (BindArchAction *BIA = dyn_cast<BindArchAction>(A)) { 703 os << '"' << (BIA->getArchName() ? BIA->getArchName() : 704 C.getDefaultToolChain().getArchName()) << '"' 705 << ", {" << PrintActions1(C, *BIA->begin(), Ids) << "}"; 706 } else { 707 os << "{"; 708 for (Action::iterator it = A->begin(), ie = A->end(); it != ie;) { 709 os << PrintActions1(C, *it, Ids); 710 ++it; 711 if (it != ie) 712 os << ", "; 713 } 714 os << "}"; 715 } 716 717 unsigned Id = Ids.size(); 718 Ids[A] = Id; 719 llvm::errs() << Id << ": " << os.str() << ", " 720 << types::getTypeName(A->getType()) << "\n"; 721 722 return Id; 723 } 724 725 void Driver::PrintActions(const Compilation &C) const { 726 std::map<Action*, unsigned> Ids; 727 for (ActionList::const_iterator it = C.getActions().begin(), 728 ie = C.getActions().end(); it != ie; ++it) 729 PrintActions1(C, *it, Ids); 730 } 731 732 /// \brief Check whether the given input tree contains any compilation or 733 /// assembly actions. 734 static bool ContainsCompileOrAssembleAction(const Action *A) { 735 if (isa<CompileJobAction>(A) || isa<AssembleJobAction>(A)) 736 return true; 737 738 for (Action::const_iterator it = A->begin(), ie = A->end(); it != ie; ++it) 739 if (ContainsCompileOrAssembleAction(*it)) 740 return true; 741 742 return false; 743 } 744 745 void Driver::BuildUniversalActions(const ToolChain &TC, 746 const DerivedArgList &Args, 747 const InputList &BAInputs, 748 ActionList &Actions) const { 749 llvm::PrettyStackTraceString CrashInfo("Building universal build actions"); 750 // Collect the list of architectures. Duplicates are allowed, but should only 751 // be handled once (in the order seen). 752 llvm::StringSet<> ArchNames; 753 SmallVector<const char *, 4> Archs; 754 for (ArgList::const_iterator it = Args.begin(), ie = Args.end(); 755 it != ie; ++it) { 756 Arg *A = *it; 757 758 if (A->getOption().matches(options::OPT_arch)) { 759 // Validate the option here; we don't save the type here because its 760 // particular spelling may participate in other driver choices. 761 llvm::Triple::ArchType Arch = 762 llvm::Triple::getArchTypeForDarwinArchName(A->getValue(Args)); 763 if (Arch == llvm::Triple::UnknownArch) { 764 Diag(clang::diag::err_drv_invalid_arch_name) 765 << A->getAsString(Args); 766 continue; 767 } 768 769 A->claim(); 770 if (ArchNames.insert(A->getValue(Args))) 771 Archs.push_back(A->getValue(Args)); 772 } 773 } 774 775 // When there is no explicit arch for this platform, make sure we still bind 776 // the architecture (to the default) so that -Xarch_ is handled correctly. 777 if (!Archs.size()) 778 Archs.push_back(0); 779 780 // FIXME: We killed off some others but these aren't yet detected in a 781 // functional manner. If we added information to jobs about which "auxiliary" 782 // files they wrote then we could detect the conflict these cause downstream. 783 if (Archs.size() > 1) { 784 // No recovery needed, the point of this is just to prevent 785 // overwriting the same files. 786 if (const Arg *A = Args.getLastArg(options::OPT_save_temps)) 787 Diag(clang::diag::err_drv_invalid_opt_with_multiple_archs) 788 << A->getAsString(Args); 789 } 790 791 ActionList SingleActions; 792 BuildActions(TC, Args, BAInputs, SingleActions); 793 794 // Add in arch bindings for every top level action, as well as lipo and 795 // dsymutil steps if needed. 796 for (unsigned i = 0, e = SingleActions.size(); i != e; ++i) { 797 Action *Act = SingleActions[i]; 798 799 // Make sure we can lipo this kind of output. If not (and it is an actual 800 // output) then we disallow, since we can't create an output file with the 801 // right name without overwriting it. We could remove this oddity by just 802 // changing the output names to include the arch, which would also fix 803 // -save-temps. Compatibility wins for now. 804 805 if (Archs.size() > 1 && !types::canLipoType(Act->getType())) 806 Diag(clang::diag::err_drv_invalid_output_with_multiple_archs) 807 << types::getTypeName(Act->getType()); 808 809 ActionList Inputs; 810 for (unsigned i = 0, e = Archs.size(); i != e; ++i) { 811 Inputs.push_back(new BindArchAction(Act, Archs[i])); 812 if (i != 0) 813 Inputs.back()->setOwnsInputs(false); 814 } 815 816 // Lipo if necessary, we do it this way because we need to set the arch flag 817 // so that -Xarch_ gets overwritten. 818 if (Inputs.size() == 1 || Act->getType() == types::TY_Nothing) 819 Actions.append(Inputs.begin(), Inputs.end()); 820 else 821 Actions.push_back(new LipoJobAction(Inputs, Act->getType())); 822 823 // Add a 'dsymutil' step if necessary, when debug info is enabled and we 824 // have a compile input. We need to run 'dsymutil' ourselves in such cases 825 // because the debug info will refer to a temporary object file which is 826 // will be removed at the end of the compilation process. 827 if (Act->getType() == types::TY_Image) { 828 Arg *A = Args.getLastArg(options::OPT_g_Group); 829 if (A && !A->getOption().matches(options::OPT_g0) && 830 !A->getOption().matches(options::OPT_gstabs) && 831 ContainsCompileOrAssembleAction(Actions.back())) { 832 ActionList Inputs; 833 Inputs.push_back(Actions.back()); 834 Actions.pop_back(); 835 836 Actions.push_back(new DsymutilJobAction(Inputs, types::TY_dSYM)); 837 838 // Verify the debug output if we're in assert mode. 839 // TODO: The verifier is noisy by default so put this under an 840 // option for now. 841 #ifndef NDEBUG 842 if (Args.hasArg(options::OPT_verify)) { 843 ActionList VerifyInputs; 844 VerifyInputs.push_back(Actions.back()); 845 Actions.pop_back(); 846 Actions.push_back(new VerifyJobAction(VerifyInputs, 847 types::TY_Nothing)); 848 } 849 #endif 850 } 851 } 852 } 853 } 854 855 // Construct a the list of inputs and their types. 856 void Driver::BuildInputs(const ToolChain &TC, const DerivedArgList &Args, 857 InputList &Inputs) const { 858 // Track the current user specified (-x) input. We also explicitly track the 859 // argument used to set the type; we only want to claim the type when we 860 // actually use it, so we warn about unused -x arguments. 861 types::ID InputType = types::TY_Nothing; 862 Arg *InputTypeArg = 0; 863 864 for (ArgList::const_iterator it = Args.begin(), ie = Args.end(); 865 it != ie; ++it) { 866 Arg *A = *it; 867 868 if (isa<InputOption>(A->getOption())) { 869 const char *Value = A->getValue(Args); 870 types::ID Ty = types::TY_INVALID; 871 872 // Infer the input type if necessary. 873 if (InputType == types::TY_Nothing) { 874 // If there was an explicit arg for this, claim it. 875 if (InputTypeArg) 876 InputTypeArg->claim(); 877 878 // stdin must be handled specially. 879 if (memcmp(Value, "-", 2) == 0) { 880 // If running with -E, treat as a C input (this changes the builtin 881 // macros, for example). This may be overridden by -ObjC below. 882 // 883 // Otherwise emit an error but still use a valid type to avoid 884 // spurious errors (e.g., no inputs). 885 if (!Args.hasArgNoClaim(options::OPT_E) && !CCCIsCPP) 886 Diag(clang::diag::err_drv_unknown_stdin_type); 887 Ty = types::TY_C; 888 } else { 889 // Otherwise lookup by extension. 890 // Fallback is C if invoked as C preprocessor or Object otherwise. 891 // We use a host hook here because Darwin at least has its own 892 // idea of what .s is. 893 if (const char *Ext = strrchr(Value, '.')) 894 Ty = TC.LookupTypeForExtension(Ext + 1); 895 896 if (Ty == types::TY_INVALID) { 897 if (CCCIsCPP) 898 Ty = types::TY_C; 899 else 900 Ty = types::TY_Object; 901 } 902 903 // If the driver is invoked as C++ compiler (like clang++ or c++) it 904 // should autodetect some input files as C++ for g++ compatibility. 905 if (CCCIsCXX) { 906 types::ID OldTy = Ty; 907 Ty = types::lookupCXXTypeForCType(Ty); 908 909 if (Ty != OldTy) 910 Diag(clang::diag::warn_drv_treating_input_as_cxx) 911 << getTypeName(OldTy) << getTypeName(Ty); 912 } 913 } 914 915 // -ObjC and -ObjC++ override the default language, but only for "source 916 // files". We just treat everything that isn't a linker input as a 917 // source file. 918 // 919 // FIXME: Clean this up if we move the phase sequence into the type. 920 if (Ty != types::TY_Object) { 921 if (Args.hasArg(options::OPT_ObjC)) 922 Ty = types::TY_ObjC; 923 else if (Args.hasArg(options::OPT_ObjCXX)) 924 Ty = types::TY_ObjCXX; 925 } 926 } else { 927 assert(InputTypeArg && "InputType set w/o InputTypeArg"); 928 InputTypeArg->claim(); 929 Ty = InputType; 930 } 931 932 // Check that the file exists, if enabled. 933 if (CheckInputsExist && memcmp(Value, "-", 2) != 0) { 934 llvm::SmallString<64> Path(Value); 935 if (Arg *WorkDir = Args.getLastArg(options::OPT_working_directory)) 936 if (llvm::sys::path::is_absolute(Path.str())) { 937 Path = WorkDir->getValue(Args); 938 llvm::sys::path::append(Path, Value); 939 } 940 941 bool exists = false; 942 if (/*error_code ec =*/llvm::sys::fs::exists(Value, exists) || !exists) 943 Diag(clang::diag::err_drv_no_such_file) << Path.str(); 944 else 945 Inputs.push_back(std::make_pair(Ty, A)); 946 } else 947 Inputs.push_back(std::make_pair(Ty, A)); 948 949 } else if (A->getOption().isLinkerInput()) { 950 // Just treat as object type, we could make a special type for this if 951 // necessary. 952 Inputs.push_back(std::make_pair(types::TY_Object, A)); 953 954 } else if (A->getOption().matches(options::OPT_x)) { 955 InputTypeArg = A; 956 InputType = types::lookupTypeForTypeSpecifier(A->getValue(Args)); 957 958 // Follow gcc behavior and treat as linker input for invalid -x 959 // options. Its not clear why we shouldn't just revert to unknown; but 960 // this isn't very important, we might as well be bug compatible. 961 if (!InputType) { 962 Diag(clang::diag::err_drv_unknown_language) << A->getValue(Args); 963 InputType = types::TY_Object; 964 } 965 } 966 } 967 if (CCCIsCPP && Inputs.empty()) { 968 // If called as standalone preprocessor, stdin is processed 969 // if no other input is present. 970 unsigned Index = Args.getBaseArgs().MakeIndex("-"); 971 Arg *A = Opts->ParseOneArg(Args, Index); 972 A->claim(); 973 Inputs.push_back(std::make_pair(types::TY_C, A)); 974 } 975 } 976 977 void Driver::BuildActions(const ToolChain &TC, const DerivedArgList &Args, 978 const InputList &Inputs, ActionList &Actions) const { 979 llvm::PrettyStackTraceString CrashInfo("Building compilation actions"); 980 981 if (!SuppressMissingInputWarning && Inputs.empty()) { 982 Diag(clang::diag::err_drv_no_input_files); 983 return; 984 } 985 986 Arg *FinalPhaseArg; 987 phases::ID FinalPhase = getFinalPhase(Args, &FinalPhaseArg); 988 989 // Reject -Z* at the top level, these options should never have been exposed 990 // by gcc. 991 if (Arg *A = Args.getLastArg(options::OPT_Z_Joined)) 992 Diag(clang::diag::err_drv_use_of_Z_option) << A->getAsString(Args); 993 994 // Construct the actions to perform. 995 ActionList LinkerInputs; 996 for (unsigned i = 0, e = Inputs.size(); i != e; ++i) { 997 types::ID InputType = Inputs[i].first; 998 const Arg *InputArg = Inputs[i].second; 999 1000 unsigned NumSteps = types::getNumCompilationPhases(InputType); 1001 assert(NumSteps && "Invalid number of steps!"); 1002 1003 // If the first step comes after the final phase we are doing as part of 1004 // this compilation, warn the user about it. 1005 phases::ID InitialPhase = types::getCompilationPhase(InputType, 0); 1006 if (InitialPhase > FinalPhase) { 1007 // Claim here to avoid the more general unused warning. 1008 InputArg->claim(); 1009 1010 // Suppress all unused style warnings with -Qunused-arguments 1011 if (Args.hasArg(options::OPT_Qunused_arguments)) 1012 continue; 1013 1014 // Special case '-E' warning on a previously preprocessed file to make 1015 // more sense. 1016 if (InitialPhase == phases::Compile && FinalPhase == phases::Preprocess && 1017 getPreprocessedType(InputType) == types::TY_INVALID) 1018 Diag(clang::diag::warn_drv_preprocessed_input_file_unused) 1019 << InputArg->getAsString(Args) 1020 << FinalPhaseArg->getOption().getName(); 1021 else 1022 Diag(clang::diag::warn_drv_input_file_unused) 1023 << InputArg->getAsString(Args) 1024 << getPhaseName(InitialPhase) 1025 << FinalPhaseArg->getOption().getName(); 1026 continue; 1027 } 1028 1029 // Build the pipeline for this file. 1030 llvm::OwningPtr<Action> Current(new InputAction(*InputArg, InputType)); 1031 for (unsigned i = 0; i != NumSteps; ++i) { 1032 phases::ID Phase = types::getCompilationPhase(InputType, i); 1033 1034 // We are done if this step is past what the user requested. 1035 if (Phase > FinalPhase) 1036 break; 1037 1038 // Queue linker inputs. 1039 if (Phase == phases::Link) { 1040 assert(i + 1 == NumSteps && "linking must be final compilation step."); 1041 LinkerInputs.push_back(Current.take()); 1042 break; 1043 } 1044 1045 // Some types skip the assembler phase (e.g., llvm-bc), but we can't 1046 // encode this in the steps because the intermediate type depends on 1047 // arguments. Just special case here. 1048 if (Phase == phases::Assemble && Current->getType() != types::TY_PP_Asm) 1049 continue; 1050 1051 // Otherwise construct the appropriate action. 1052 Current.reset(ConstructPhaseAction(Args, Phase, Current.take())); 1053 if (Current->getType() == types::TY_Nothing) 1054 break; 1055 } 1056 1057 // If we ended with something, add to the output list. 1058 if (Current) 1059 Actions.push_back(Current.take()); 1060 } 1061 1062 // Add a link action if necessary. 1063 if (!LinkerInputs.empty()) 1064 Actions.push_back(new LinkJobAction(LinkerInputs, types::TY_Image)); 1065 1066 // If we are linking, claim any options which are obviously only used for 1067 // compilation. 1068 if (FinalPhase == phases::Link) 1069 Args.ClaimAllArgs(options::OPT_CompileOnly_Group); 1070 } 1071 1072 Action *Driver::ConstructPhaseAction(const ArgList &Args, phases::ID Phase, 1073 Action *Input) const { 1074 llvm::PrettyStackTraceString CrashInfo("Constructing phase actions"); 1075 // Build the appropriate action. 1076 switch (Phase) { 1077 case phases::Link: llvm_unreachable("link action invalid here."); 1078 case phases::Preprocess: { 1079 types::ID OutputTy; 1080 // -{M, MM} alter the output type. 1081 if (Args.hasArg(options::OPT_M, options::OPT_MM)) { 1082 OutputTy = types::TY_Dependencies; 1083 } else { 1084 OutputTy = types::getPreprocessedType(Input->getType()); 1085 assert(OutputTy != types::TY_INVALID && 1086 "Cannot preprocess this input type!"); 1087 } 1088 return new PreprocessJobAction(Input, OutputTy); 1089 } 1090 case phases::Precompile: 1091 return new PrecompileJobAction(Input, types::TY_PCH); 1092 case phases::Compile: { 1093 if (Args.hasArg(options::OPT_fsyntax_only)) { 1094 return new CompileJobAction(Input, types::TY_Nothing); 1095 } else if (Args.hasArg(options::OPT_rewrite_objc)) { 1096 return new CompileJobAction(Input, types::TY_RewrittenObjC); 1097 } else if (Args.hasArg(options::OPT__analyze, options::OPT__analyze_auto)) { 1098 return new AnalyzeJobAction(Input, types::TY_Plist); 1099 } else if (Args.hasArg(options::OPT_emit_ast)) { 1100 return new CompileJobAction(Input, types::TY_AST); 1101 } else if (IsUsingLTO(Args)) { 1102 types::ID Output = 1103 Args.hasArg(options::OPT_S) ? types::TY_LTO_IR : types::TY_LTO_BC; 1104 return new CompileJobAction(Input, Output); 1105 } else { 1106 return new CompileJobAction(Input, types::TY_PP_Asm); 1107 } 1108 } 1109 case phases::Assemble: 1110 return new AssembleJobAction(Input, types::TY_Object); 1111 } 1112 1113 llvm_unreachable("invalid phase in ConstructPhaseAction"); 1114 } 1115 1116 bool Driver::IsUsingLTO(const ArgList &Args) const { 1117 // Check for -emit-llvm or -flto. 1118 if (Args.hasArg(options::OPT_emit_llvm) || 1119 Args.hasFlag(options::OPT_flto, options::OPT_fno_lto, false)) 1120 return true; 1121 1122 // Check for -O4. 1123 if (const Arg *A = Args.getLastArg(options::OPT_O_Group)) 1124 return A->getOption().matches(options::OPT_O4); 1125 1126 return false; 1127 } 1128 1129 void Driver::BuildJobs(Compilation &C) const { 1130 llvm::PrettyStackTraceString CrashInfo("Building compilation jobs"); 1131 1132 Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o); 1133 1134 // It is an error to provide a -o option if we are making multiple output 1135 // files. 1136 if (FinalOutput) { 1137 unsigned NumOutputs = 0; 1138 for (ActionList::const_iterator it = C.getActions().begin(), 1139 ie = C.getActions().end(); it != ie; ++it) 1140 if ((*it)->getType() != types::TY_Nothing) 1141 ++NumOutputs; 1142 1143 if (NumOutputs > 1) { 1144 Diag(clang::diag::err_drv_output_argument_with_multiple_files); 1145 FinalOutput = 0; 1146 } 1147 } 1148 1149 for (ActionList::const_iterator it = C.getActions().begin(), 1150 ie = C.getActions().end(); it != ie; ++it) { 1151 Action *A = *it; 1152 1153 // If we are linking an image for multiple archs then the linker wants 1154 // -arch_multiple and -final_output <final image name>. Unfortunately, this 1155 // doesn't fit in cleanly because we have to pass this information down. 1156 // 1157 // FIXME: This is a hack; find a cleaner way to integrate this into the 1158 // process. 1159 const char *LinkingOutput = 0; 1160 if (isa<LipoJobAction>(A)) { 1161 if (FinalOutput) 1162 LinkingOutput = FinalOutput->getValue(C.getArgs()); 1163 else 1164 LinkingOutput = DefaultImageName.c_str(); 1165 } 1166 1167 InputInfo II; 1168 BuildJobsForAction(C, A, &C.getDefaultToolChain(), 1169 /*BoundArch*/0, 1170 /*AtTopLevel*/ true, 1171 /*LinkingOutput*/ LinkingOutput, 1172 II); 1173 } 1174 1175 // If the user passed -Qunused-arguments or there were errors, don't warn 1176 // about any unused arguments. 1177 if (Diags.hasErrorOccurred() || 1178 C.getArgs().hasArg(options::OPT_Qunused_arguments)) 1179 return; 1180 1181 // Claim -### here. 1182 (void) C.getArgs().hasArg(options::OPT__HASH_HASH_HASH); 1183 1184 for (ArgList::const_iterator it = C.getArgs().begin(), ie = C.getArgs().end(); 1185 it != ie; ++it) { 1186 Arg *A = *it; 1187 1188 // FIXME: It would be nice to be able to send the argument to the 1189 // DiagnosticsEngine, so that extra values, position, and so on could be 1190 // printed. 1191 if (!A->isClaimed()) { 1192 if (A->getOption().hasNoArgumentUnused()) 1193 continue; 1194 1195 // Suppress the warning automatically if this is just a flag, and it is an 1196 // instance of an argument we already claimed. 1197 const Option &Opt = A->getOption(); 1198 if (isa<FlagOption>(Opt)) { 1199 bool DuplicateClaimed = false; 1200 1201 for (arg_iterator it = C.getArgs().filtered_begin(&Opt), 1202 ie = C.getArgs().filtered_end(); it != ie; ++it) { 1203 if ((*it)->isClaimed()) { 1204 DuplicateClaimed = true; 1205 break; 1206 } 1207 } 1208 1209 if (DuplicateClaimed) 1210 continue; 1211 } 1212 1213 Diag(clang::diag::warn_drv_unused_argument) 1214 << A->getAsString(C.getArgs()); 1215 } 1216 } 1217 } 1218 1219 static const Tool &SelectToolForJob(Compilation &C, const ToolChain *TC, 1220 const JobAction *JA, 1221 const ActionList *&Inputs) { 1222 const Tool *ToolForJob = 0; 1223 1224 // See if we should look for a compiler with an integrated assembler. We match 1225 // bottom up, so what we are actually looking for is an assembler job with a 1226 // compiler input. 1227 1228 // FIXME: This doesn't belong here, but ideally we will support static soon 1229 // anyway. 1230 bool HasStatic = (C.getArgs().hasArg(options::OPT_mkernel) || 1231 C.getArgs().hasArg(options::OPT_static) || 1232 C.getArgs().hasArg(options::OPT_fapple_kext)); 1233 bool IsDarwin = TC->getTriple().isOSDarwin(); 1234 bool IsIADefault = TC->IsIntegratedAssemblerDefault() && 1235 !(HasStatic && IsDarwin); 1236 if (C.getArgs().hasFlag(options::OPT_integrated_as, 1237 options::OPT_no_integrated_as, 1238 IsIADefault) && 1239 !C.getArgs().hasArg(options::OPT_save_temps) && 1240 isa<AssembleJobAction>(JA) && 1241 Inputs->size() == 1 && isa<CompileJobAction>(*Inputs->begin())) { 1242 const Tool &Compiler = TC->SelectTool( 1243 C, cast<JobAction>(**Inputs->begin()), (*Inputs)[0]->getInputs()); 1244 if (Compiler.hasIntegratedAssembler()) { 1245 Inputs = &(*Inputs)[0]->getInputs(); 1246 ToolForJob = &Compiler; 1247 } 1248 } 1249 1250 // Otherwise use the tool for the current job. 1251 if (!ToolForJob) 1252 ToolForJob = &TC->SelectTool(C, *JA, *Inputs); 1253 1254 // See if we should use an integrated preprocessor. We do so when we have 1255 // exactly one input, since this is the only use case we care about 1256 // (irrelevant since we don't support combine yet). 1257 if (Inputs->size() == 1 && isa<PreprocessJobAction>(*Inputs->begin()) && 1258 !C.getArgs().hasArg(options::OPT_no_integrated_cpp) && 1259 !C.getArgs().hasArg(options::OPT_traditional_cpp) && 1260 !C.getArgs().hasArg(options::OPT_save_temps) && 1261 ToolForJob->hasIntegratedCPP()) 1262 Inputs = &(*Inputs)[0]->getInputs(); 1263 1264 return *ToolForJob; 1265 } 1266 1267 void Driver::BuildJobsForAction(Compilation &C, 1268 const Action *A, 1269 const ToolChain *TC, 1270 const char *BoundArch, 1271 bool AtTopLevel, 1272 const char *LinkingOutput, 1273 InputInfo &Result) const { 1274 llvm::PrettyStackTraceString CrashInfo("Building compilation jobs"); 1275 1276 if (const InputAction *IA = dyn_cast<InputAction>(A)) { 1277 // FIXME: It would be nice to not claim this here; maybe the old scheme of 1278 // just using Args was better? 1279 const Arg &Input = IA->getInputArg(); 1280 Input.claim(); 1281 if (Input.getOption().matches(options::OPT_INPUT)) { 1282 const char *Name = Input.getValue(C.getArgs()); 1283 Result = InputInfo(Name, A->getType(), Name); 1284 } else 1285 Result = InputInfo(&Input, A->getType(), ""); 1286 return; 1287 } 1288 1289 if (const BindArchAction *BAA = dyn_cast<BindArchAction>(A)) { 1290 const ToolChain *TC = &C.getDefaultToolChain(); 1291 1292 std::string Arch; 1293 if (BAA->getArchName()) 1294 TC = Host->CreateToolChain(C.getArgs(), BAA->getArchName()); 1295 1296 BuildJobsForAction(C, *BAA->begin(), TC, BAA->getArchName(), 1297 AtTopLevel, LinkingOutput, Result); 1298 return; 1299 } 1300 1301 const ActionList *Inputs = &A->getInputs(); 1302 1303 const JobAction *JA = cast<JobAction>(A); 1304 const Tool &T = SelectToolForJob(C, TC, JA, Inputs); 1305 1306 // Only use pipes when there is exactly one input. 1307 InputInfoList InputInfos; 1308 for (ActionList::const_iterator it = Inputs->begin(), ie = Inputs->end(); 1309 it != ie; ++it) { 1310 // Treat dsymutil sub-jobs as being at the top-level too, they shouldn't get 1311 // temporary output names. 1312 // 1313 // FIXME: Clean this up. 1314 bool SubJobAtTopLevel = false; 1315 if (AtTopLevel && isa<DsymutilJobAction>(A)) 1316 SubJobAtTopLevel = true; 1317 1318 // Also treat verify sub-jobs as being at the top-level. They don't 1319 // produce any output and so don't need temporary output names. 1320 if (AtTopLevel && isa<VerifyJobAction>(A)) 1321 SubJobAtTopLevel = true; 1322 1323 InputInfo II; 1324 BuildJobsForAction(C, *it, TC, BoundArch, 1325 SubJobAtTopLevel, LinkingOutput, II); 1326 InputInfos.push_back(II); 1327 } 1328 1329 // Always use the first input as the base input. 1330 const char *BaseInput = InputInfos[0].getBaseInput(); 1331 1332 // ... except dsymutil actions, which use their actual input as the base 1333 // input. 1334 if (JA->getType() == types::TY_dSYM) 1335 BaseInput = InputInfos[0].getFilename(); 1336 1337 // Determine the place to write output to, if any. 1338 if (JA->getType() == types::TY_Nothing) { 1339 Result = InputInfo(A->getType(), BaseInput); 1340 } else { 1341 Result = InputInfo(GetNamedOutputPath(C, *JA, BaseInput, AtTopLevel), 1342 A->getType(), BaseInput); 1343 } 1344 1345 if (CCCPrintBindings && !CCGenDiagnostics) { 1346 llvm::errs() << "# \"" << T.getToolChain().getTripleString() << '"' 1347 << " - \"" << T.getName() << "\", inputs: ["; 1348 for (unsigned i = 0, e = InputInfos.size(); i != e; ++i) { 1349 llvm::errs() << InputInfos[i].getAsString(); 1350 if (i + 1 != e) 1351 llvm::errs() << ", "; 1352 } 1353 llvm::errs() << "], output: " << Result.getAsString() << "\n"; 1354 } else { 1355 T.ConstructJob(C, *JA, Result, InputInfos, 1356 C.getArgsForToolChain(TC, BoundArch), LinkingOutput); 1357 } 1358 } 1359 1360 const char *Driver::GetNamedOutputPath(Compilation &C, 1361 const JobAction &JA, 1362 const char *BaseInput, 1363 bool AtTopLevel) const { 1364 llvm::PrettyStackTraceString CrashInfo("Computing output path"); 1365 // Output to a user requested destination? 1366 if (AtTopLevel && !isa<DsymutilJobAction>(JA) && 1367 !isa<VerifyJobAction>(JA)) { 1368 if (Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o)) 1369 return C.addResultFile(FinalOutput->getValue(C.getArgs())); 1370 } 1371 1372 // Default to writing to stdout? 1373 if (AtTopLevel && isa<PreprocessJobAction>(JA) && !CCGenDiagnostics) 1374 return "-"; 1375 1376 // Output to a temporary file? 1377 if ((!AtTopLevel && !C.getArgs().hasArg(options::OPT_save_temps)) || 1378 CCGenDiagnostics) { 1379 StringRef Name = llvm::sys::path::filename(BaseInput); 1380 std::pair<StringRef, StringRef> Split = Name.split('.'); 1381 std::string TmpName = 1382 GetTemporaryPath(Split.first, types::getTypeTempSuffix(JA.getType())); 1383 return C.addTempFile(C.getArgs().MakeArgString(TmpName.c_str())); 1384 } 1385 1386 llvm::SmallString<128> BasePath(BaseInput); 1387 StringRef BaseName; 1388 1389 // Dsymutil actions should use the full path. 1390 if (isa<DsymutilJobAction>(JA) || isa<VerifyJobAction>(JA)) 1391 BaseName = BasePath; 1392 else 1393 BaseName = llvm::sys::path::filename(BasePath); 1394 1395 // Determine what the derived output name should be. 1396 const char *NamedOutput; 1397 if (JA.getType() == types::TY_Image) { 1398 NamedOutput = DefaultImageName.c_str(); 1399 } else { 1400 const char *Suffix = types::getTypeTempSuffix(JA.getType()); 1401 assert(Suffix && "All types used for output should have a suffix."); 1402 1403 std::string::size_type End = std::string::npos; 1404 if (!types::appendSuffixForType(JA.getType())) 1405 End = BaseName.rfind('.'); 1406 std::string Suffixed(BaseName.substr(0, End)); 1407 Suffixed += '.'; 1408 Suffixed += Suffix; 1409 NamedOutput = C.getArgs().MakeArgString(Suffixed.c_str()); 1410 } 1411 1412 // If we're saving temps and the temp filename conflicts with the input 1413 // filename, then avoid overwriting input file. 1414 if (!AtTopLevel && C.getArgs().hasArg(options::OPT_save_temps) && 1415 NamedOutput == BaseName) { 1416 StringRef Name = llvm::sys::path::filename(BaseInput); 1417 std::pair<StringRef, StringRef> Split = Name.split('.'); 1418 std::string TmpName = 1419 GetTemporaryPath(Split.first, types::getTypeTempSuffix(JA.getType())); 1420 return C.addTempFile(C.getArgs().MakeArgString(TmpName.c_str())); 1421 } 1422 1423 // As an annoying special case, PCH generation doesn't strip the pathname. 1424 if (JA.getType() == types::TY_PCH) { 1425 llvm::sys::path::remove_filename(BasePath); 1426 if (BasePath.empty()) 1427 BasePath = NamedOutput; 1428 else 1429 llvm::sys::path::append(BasePath, NamedOutput); 1430 return C.addResultFile(C.getArgs().MakeArgString(BasePath.c_str())); 1431 } else { 1432 return C.addResultFile(NamedOutput); 1433 } 1434 } 1435 1436 std::string Driver::GetFilePath(const char *Name, const ToolChain &TC) const { 1437 // Respect a limited subset of the '-Bprefix' functionality in GCC by 1438 // attempting to use this prefix when lokup up program paths. 1439 for (Driver::prefix_list::const_iterator it = PrefixDirs.begin(), 1440 ie = PrefixDirs.end(); it != ie; ++it) { 1441 std::string Dir(*it); 1442 if (Dir.empty()) 1443 continue; 1444 if (Dir[0] == '=') 1445 Dir = SysRoot + Dir.substr(1); 1446 llvm::sys::Path P(Dir); 1447 P.appendComponent(Name); 1448 bool Exists; 1449 if (!llvm::sys::fs::exists(P.str(), Exists) && Exists) 1450 return P.str(); 1451 } 1452 1453 llvm::sys::Path P(ResourceDir); 1454 P.appendComponent(Name); 1455 bool Exists; 1456 if (!llvm::sys::fs::exists(P.str(), Exists) && Exists) 1457 return P.str(); 1458 1459 const ToolChain::path_list &List = TC.getFilePaths(); 1460 for (ToolChain::path_list::const_iterator 1461 it = List.begin(), ie = List.end(); it != ie; ++it) { 1462 std::string Dir(*it); 1463 if (Dir.empty()) 1464 continue; 1465 if (Dir[0] == '=') 1466 Dir = SysRoot + Dir.substr(1); 1467 llvm::sys::Path P(Dir); 1468 P.appendComponent(Name); 1469 bool Exists; 1470 if (!llvm::sys::fs::exists(P.str(), Exists) && Exists) 1471 return P.str(); 1472 } 1473 1474 return Name; 1475 } 1476 1477 static bool isPathExecutable(llvm::sys::Path &P, bool WantFile) { 1478 bool Exists; 1479 return (WantFile ? !llvm::sys::fs::exists(P.str(), Exists) && Exists 1480 : P.canExecute()); 1481 } 1482 1483 std::string Driver::GetProgramPath(const char *Name, const ToolChain &TC, 1484 bool WantFile) const { 1485 std::string TargetSpecificExecutable(DefaultHostTriple + "-" + Name); 1486 // Respect a limited subset of the '-Bprefix' functionality in GCC by 1487 // attempting to use this prefix when lokup up program paths. 1488 for (Driver::prefix_list::const_iterator it = PrefixDirs.begin(), 1489 ie = PrefixDirs.end(); it != ie; ++it) { 1490 llvm::sys::Path P(*it); 1491 P.appendComponent(TargetSpecificExecutable); 1492 if (isPathExecutable(P, WantFile)) return P.str(); 1493 P.eraseComponent(); 1494 P.appendComponent(Name); 1495 if (isPathExecutable(P, WantFile)) return P.str(); 1496 } 1497 1498 const ToolChain::path_list &List = TC.getProgramPaths(); 1499 for (ToolChain::path_list::const_iterator 1500 it = List.begin(), ie = List.end(); it != ie; ++it) { 1501 llvm::sys::Path P(*it); 1502 P.appendComponent(TargetSpecificExecutable); 1503 if (isPathExecutable(P, WantFile)) return P.str(); 1504 P.eraseComponent(); 1505 P.appendComponent(Name); 1506 if (isPathExecutable(P, WantFile)) return P.str(); 1507 } 1508 1509 // If all else failed, search the path. 1510 llvm::sys::Path 1511 P(llvm::sys::Program::FindProgramByName(TargetSpecificExecutable)); 1512 if (!P.empty()) 1513 return P.str(); 1514 1515 P = llvm::sys::Path(llvm::sys::Program::FindProgramByName(Name)); 1516 if (!P.empty()) 1517 return P.str(); 1518 1519 return Name; 1520 } 1521 1522 std::string Driver::GetTemporaryPath(StringRef Prefix, const char *Suffix) 1523 const { 1524 // FIXME: This is lame; sys::Path should provide this function (in particular, 1525 // it should know how to find the temporary files dir). 1526 std::string Error; 1527 const char *TmpDir = ::getenv("TMPDIR"); 1528 if (!TmpDir) 1529 TmpDir = ::getenv("TEMP"); 1530 if (!TmpDir) 1531 TmpDir = ::getenv("TMP"); 1532 if (!TmpDir) 1533 TmpDir = "/tmp"; 1534 llvm::sys::Path P(TmpDir); 1535 P.appendComponent(Prefix); 1536 if (P.makeUnique(false, &Error)) { 1537 Diag(clang::diag::err_drv_unable_to_make_temp) << Error; 1538 return ""; 1539 } 1540 1541 // FIXME: Grumble, makeUnique sometimes leaves the file around!? PR3837. 1542 P.eraseFromDisk(false, 0); 1543 1544 P.appendSuffix(Suffix); 1545 return P.str(); 1546 } 1547 1548 const HostInfo *Driver::GetHostInfo(const char *TripleStr) const { 1549 llvm::PrettyStackTraceString CrashInfo("Constructing host"); 1550 llvm::Triple Triple(llvm::Triple::normalize(TripleStr).c_str()); 1551 1552 // TCE is an osless target 1553 if (Triple.getArchName() == "tce") 1554 return createTCEHostInfo(*this, Triple); 1555 1556 switch (Triple.getOS()) { 1557 case llvm::Triple::AuroraUX: 1558 return createAuroraUXHostInfo(*this, Triple); 1559 case llvm::Triple::Darwin: 1560 case llvm::Triple::MacOSX: 1561 case llvm::Triple::IOS: 1562 return createDarwinHostInfo(*this, Triple); 1563 case llvm::Triple::DragonFly: 1564 return createDragonFlyHostInfo(*this, Triple); 1565 case llvm::Triple::OpenBSD: 1566 return createOpenBSDHostInfo(*this, Triple); 1567 case llvm::Triple::NetBSD: 1568 return createNetBSDHostInfo(*this, Triple); 1569 case llvm::Triple::FreeBSD: 1570 return createFreeBSDHostInfo(*this, Triple); 1571 case llvm::Triple::Minix: 1572 return createMinixHostInfo(*this, Triple); 1573 case llvm::Triple::Linux: 1574 return createLinuxHostInfo(*this, Triple); 1575 case llvm::Triple::Win32: 1576 return createWindowsHostInfo(*this, Triple); 1577 case llvm::Triple::MinGW32: 1578 return createMinGWHostInfo(*this, Triple); 1579 default: 1580 return createUnknownHostInfo(*this, Triple); 1581 } 1582 } 1583 1584 bool Driver::ShouldUseClangCompiler(const Compilation &C, const JobAction &JA, 1585 const llvm::Triple &Triple) const { 1586 // Check if user requested no clang, or clang doesn't understand this type (we 1587 // only handle single inputs for now). 1588 if (!CCCUseClang || JA.size() != 1 || 1589 !types::isAcceptedByClang((*JA.begin())->getType())) 1590 return false; 1591 1592 // Otherwise make sure this is an action clang understands. 1593 if (isa<PreprocessJobAction>(JA)) { 1594 if (!CCCUseClangCPP) { 1595 Diag(clang::diag::warn_drv_not_using_clang_cpp); 1596 return false; 1597 } 1598 } else if (!isa<PrecompileJobAction>(JA) && !isa<CompileJobAction>(JA)) 1599 return false; 1600 1601 // Use clang for C++? 1602 if (!CCCUseClangCXX && types::isCXX((*JA.begin())->getType())) { 1603 Diag(clang::diag::warn_drv_not_using_clang_cxx); 1604 return false; 1605 } 1606 1607 // Always use clang for precompiling, AST generation, and rewriting, 1608 // regardless of archs. 1609 if (isa<PrecompileJobAction>(JA) || 1610 types::isOnlyAcceptedByClang(JA.getType())) 1611 return true; 1612 1613 // Finally, don't use clang if this isn't one of the user specified archs to 1614 // build. 1615 if (!CCCClangArchs.empty() && !CCCClangArchs.count(Triple.getArch())) { 1616 Diag(clang::diag::warn_drv_not_using_clang_arch) << Triple.getArchName(); 1617 return false; 1618 } 1619 1620 return true; 1621 } 1622 1623 /// GetReleaseVersion - Parse (([0-9]+)(.([0-9]+)(.([0-9]+)?))?)? and return the 1624 /// grouped values as integers. Numbers which are not provided are set to 0. 1625 /// 1626 /// \return True if the entire string was parsed (9.2), or all groups were 1627 /// parsed (10.3.5extrastuff). 1628 bool Driver::GetReleaseVersion(const char *Str, unsigned &Major, 1629 unsigned &Minor, unsigned &Micro, 1630 bool &HadExtra) { 1631 HadExtra = false; 1632 1633 Major = Minor = Micro = 0; 1634 if (*Str == '\0') 1635 return true; 1636 1637 char *End; 1638 Major = (unsigned) strtol(Str, &End, 10); 1639 if (*Str != '\0' && *End == '\0') 1640 return true; 1641 if (*End != '.') 1642 return false; 1643 1644 Str = End+1; 1645 Minor = (unsigned) strtol(Str, &End, 10); 1646 if (*Str != '\0' && *End == '\0') 1647 return true; 1648 if (*End != '.') 1649 return false; 1650 1651 Str = End+1; 1652 Micro = (unsigned) strtol(Str, &End, 10); 1653 if (*Str != '\0' && *End == '\0') 1654 return true; 1655 if (Str == End) 1656 return false; 1657 HadExtra = true; 1658 return true; 1659 } 1660