Driver.cpp revision 5183b3d5d5f911f1e9fd8e5d877c7fe039963e31
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 46using namespace clang::driver; 47using namespace clang; 48 49Driver::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 91Driver::~Driver() { 92 delete Opts; 93 delete Host; 94} 95 96InputArgList *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. 123phases::ID Driver::getFinalPhase(const DerivedArgList &DAL, Arg **FinalPhaseArg) 124const { 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 157DerivedArgList *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 238Compilation *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. 366void 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 // Save the original job command(s). 377 std::string Cmd; 378 llvm::raw_string_ostream OS(Cmd); 379 C.PrintJob(OS, C.getJobs(), "\n", false); 380 OS.flush(); 381 382 // Clear stale state and suppress tool output. 383 C.initCompilationForDiagnostics(); 384 Diags.Reset(); 385 386 // Construct the list of inputs. 387 InputList Inputs; 388 BuildInputs(C.getDefaultToolChain(), C.getArgs(), Inputs); 389 390 for (InputList::iterator it = Inputs.begin(), ie = Inputs.end(); it != ie;) { 391 bool IgnoreInput = false; 392 393 // Ignore input from stdin or any inputs that cannot be preprocessed. 394 if (!strcmp(it->second->getValue(C.getArgs()), "-")) { 395 Diag(clang::diag::note_drv_command_failed_diag_msg) 396 << "Error generating preprocessed source(s) - ignoring input from stdin" 397 "."; 398 IgnoreInput = true; 399 } else if (types::getPreprocessedType(it->first) == types::TY_INVALID) { 400 IgnoreInput = true; 401 } 402 403 if (IgnoreInput) { 404 it = Inputs.erase(it); 405 ie = Inputs.end(); 406 } else { 407 ++it; 408 } 409 } 410 411 // Don't attempt to generate preprocessed files if multiple -arch options are 412 // used. 413 int Archs = 0; 414 for (ArgList::const_iterator it = C.getArgs().begin(), ie = C.getArgs().end(); 415 it != ie; ++it) { 416 Arg *A = *it; 417 if (A->getOption().matches(options::OPT_arch)) { 418 Archs++; 419 if (Archs > 1) { 420 Diag(clang::diag::note_drv_command_failed_diag_msg) 421 << "Error generating preprocessed source(s) - cannot generate " 422 "preprocessed source with multiple -arch options."; 423 return; 424 } 425 } 426 } 427 428 if (Inputs.empty()) { 429 Diag(clang::diag::note_drv_command_failed_diag_msg) 430 << "Error generating preprocessed source(s) - no preprocessable inputs."; 431 return; 432 } 433 434 // Construct the list of abstract actions to perform for this compilation. 435 if (Host->useDriverDriver()) 436 BuildUniversalActions(C.getDefaultToolChain(), C.getArgs(), 437 Inputs, C.getActions()); 438 else 439 BuildActions(C.getDefaultToolChain(), C.getArgs(), Inputs, 440 C.getActions()); 441 442 BuildJobs(C); 443 444 // If there were errors building the compilation, quit now. 445 if (Diags.hasErrorOccurred()) { 446 Diag(clang::diag::note_drv_command_failed_diag_msg) 447 << "Error generating preprocessed source(s)."; 448 return; 449 } 450 451 // Generate preprocessed output. 452 FailingCommand = 0; 453 int Res = C.ExecuteJob(C.getJobs(), FailingCommand); 454 455 // If the command succeeded, we are done. 456 if (Res == 0) { 457 Diag(clang::diag::note_drv_command_failed_diag_msg) 458 << "Preprocessed source(s) and associated run script(s) are located at:"; 459 ArgStringList Files = C.getTempFiles(); 460 for (ArgStringList::const_iterator it = Files.begin(), ie = Files.end(); 461 it != ie; ++it) { 462 Diag(clang::diag::note_drv_command_failed_diag_msg) << *it; 463 464 std::string Err; 465 std::string Script = StringRef(*it).rsplit('.').first; 466 Script += ".sh"; 467 llvm::raw_fd_ostream ScriptOS(Script.c_str(), Err, 468 llvm::raw_fd_ostream::F_Excl | 469 llvm::raw_fd_ostream::F_Binary); 470 if (!Err.empty()) { 471 Diag(clang::diag::note_drv_command_failed_diag_msg) 472 << "Error generating run script: " + Script + " " + Err; 473 } else { 474 ScriptOS << Cmd; 475 Diag(clang::diag::note_drv_command_failed_diag_msg) << Script; 476 } 477 } 478 } else { 479 // Failure, remove preprocessed files. 480 if (!C.getArgs().hasArg(options::OPT_save_temps)) 481 C.CleanupFileList(C.getTempFiles(), true); 482 483 Diag(clang::diag::note_drv_command_failed_diag_msg) 484 << "Error generating preprocessed source(s)."; 485 } 486} 487 488int Driver::ExecuteCompilation(const Compilation &C, 489 const Command *&FailingCommand) const { 490 // Just print if -### was present. 491 if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) { 492 C.PrintJob(llvm::errs(), C.getJobs(), "\n", true); 493 return 0; 494 } 495 496 // If there were errors building the compilation, quit now. 497 if (Diags.hasErrorOccurred()) 498 return 1; 499 500 int Res = C.ExecuteJob(C.getJobs(), FailingCommand); 501 502 // Remove temp files. 503 C.CleanupFileList(C.getTempFiles()); 504 505 // If the command succeeded, we are done. 506 if (Res == 0) 507 return Res; 508 509 // Otherwise, remove result files as well. 510 if (!C.getArgs().hasArg(options::OPT_save_temps)) 511 C.CleanupFileList(C.getResultFiles(), true); 512 513 // Print extra information about abnormal failures, if possible. 514 // 515 // This is ad-hoc, but we don't want to be excessively noisy. If the result 516 // status was 1, assume the command failed normally. In particular, if it was 517 // the compiler then assume it gave a reasonable error code. Failures in other 518 // tools are less common, and they generally have worse diagnostics, so always 519 // print the diagnostic there. 520 const Tool &FailingTool = FailingCommand->getCreator(); 521 522 if (!FailingCommand->getCreator().hasGoodDiagnostics() || Res != 1) { 523 // FIXME: See FIXME above regarding result code interpretation. 524 if (Res < 0) 525 Diag(clang::diag::err_drv_command_signalled) 526 << FailingTool.getShortName() << -Res; 527 else 528 Diag(clang::diag::err_drv_command_failed) 529 << FailingTool.getShortName() << Res; 530 } 531 532 return Res; 533} 534 535void Driver::PrintOptions(const ArgList &Args) const { 536 unsigned i = 0; 537 for (ArgList::const_iterator it = Args.begin(), ie = Args.end(); 538 it != ie; ++it, ++i) { 539 Arg *A = *it; 540 llvm::errs() << "Option " << i << " - " 541 << "Name: \"" << A->getOption().getName() << "\", " 542 << "Values: {"; 543 for (unsigned j = 0; j < A->getNumValues(); ++j) { 544 if (j) 545 llvm::errs() << ", "; 546 llvm::errs() << '"' << A->getValue(Args, j) << '"'; 547 } 548 llvm::errs() << "}\n"; 549 } 550} 551 552void Driver::PrintHelp(bool ShowHidden) const { 553 getOpts().PrintHelp(llvm::outs(), Name.c_str(), DriverTitle.c_str(), 554 ShowHidden); 555} 556 557void Driver::PrintVersion(const Compilation &C, raw_ostream &OS) const { 558 // FIXME: The following handlers should use a callback mechanism, we don't 559 // know what the client would like to do. 560 OS << getClangFullVersion() << '\n'; 561 const ToolChain &TC = C.getDefaultToolChain(); 562 OS << "Target: " << TC.getTripleString() << '\n'; 563 564 // Print the threading model. 565 // 566 // FIXME: Implement correctly. 567 OS << "Thread model: " << "posix" << '\n'; 568} 569 570/// PrintDiagnosticCategories - Implement the --print-diagnostic-categories 571/// option. 572static void PrintDiagnosticCategories(raw_ostream &OS) { 573 // Skip the empty category. 574 for (unsigned i = 1, max = DiagnosticIDs::getNumberOfCategories(); 575 i != max; ++i) 576 OS << i << ',' << DiagnosticIDs::getCategoryNameFromID(i) << '\n'; 577} 578 579bool Driver::HandleImmediateArgs(const Compilation &C) { 580 // The order these options are handled in gcc is all over the place, but we 581 // don't expect inconsistencies w.r.t. that to matter in practice. 582 583 if (C.getArgs().hasArg(options::OPT_dumpmachine)) { 584 llvm::outs() << C.getDefaultToolChain().getTripleString() << '\n'; 585 return false; 586 } 587 588 if (C.getArgs().hasArg(options::OPT_dumpversion)) { 589 // Since -dumpversion is only implemented for pedantic GCC compatibility, we 590 // return an answer which matches our definition of __VERSION__. 591 // 592 // If we want to return a more correct answer some day, then we should 593 // introduce a non-pedantically GCC compatible mode to Clang in which we 594 // provide sensible definitions for -dumpversion, __VERSION__, etc. 595 llvm::outs() << "4.2.1\n"; 596 return false; 597 } 598 599 if (C.getArgs().hasArg(options::OPT__print_diagnostic_categories)) { 600 PrintDiagnosticCategories(llvm::outs()); 601 return false; 602 } 603 604 if (C.getArgs().hasArg(options::OPT__help) || 605 C.getArgs().hasArg(options::OPT__help_hidden)) { 606 PrintHelp(C.getArgs().hasArg(options::OPT__help_hidden)); 607 return false; 608 } 609 610 if (C.getArgs().hasArg(options::OPT__version)) { 611 // Follow gcc behavior and use stdout for --version and stderr for -v. 612 PrintVersion(C, llvm::outs()); 613 return false; 614 } 615 616 if (C.getArgs().hasArg(options::OPT_v) || 617 C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) { 618 PrintVersion(C, llvm::errs()); 619 SuppressMissingInputWarning = true; 620 } 621 622 const ToolChain &TC = C.getDefaultToolChain(); 623 if (C.getArgs().hasArg(options::OPT_print_search_dirs)) { 624 llvm::outs() << "programs: ="; 625 for (ToolChain::path_list::const_iterator it = TC.getProgramPaths().begin(), 626 ie = TC.getProgramPaths().end(); it != ie; ++it) { 627 if (it != TC.getProgramPaths().begin()) 628 llvm::outs() << ':'; 629 llvm::outs() << *it; 630 } 631 llvm::outs() << "\n"; 632 llvm::outs() << "libraries: =" << ResourceDir; 633 634 std::string sysroot; 635 if (Arg *A = C.getArgs().getLastArg(options::OPT__sysroot_EQ)) 636 sysroot = A->getValue(C.getArgs()); 637 638 for (ToolChain::path_list::const_iterator it = TC.getFilePaths().begin(), 639 ie = TC.getFilePaths().end(); it != ie; ++it) { 640 llvm::outs() << ':'; 641 const char *path = it->c_str(); 642 if (path[0] == '=') 643 llvm::outs() << sysroot << path + 1; 644 else 645 llvm::outs() << path; 646 } 647 llvm::outs() << "\n"; 648 return false; 649 } 650 651 // FIXME: The following handlers should use a callback mechanism, we don't 652 // know what the client would like to do. 653 if (Arg *A = C.getArgs().getLastArg(options::OPT_print_file_name_EQ)) { 654 llvm::outs() << GetFilePath(A->getValue(C.getArgs()), TC) << "\n"; 655 return false; 656 } 657 658 if (Arg *A = C.getArgs().getLastArg(options::OPT_print_prog_name_EQ)) { 659 llvm::outs() << GetProgramPath(A->getValue(C.getArgs()), TC) << "\n"; 660 return false; 661 } 662 663 if (C.getArgs().hasArg(options::OPT_print_libgcc_file_name)) { 664 llvm::outs() << GetFilePath("libgcc.a", TC) << "\n"; 665 return false; 666 } 667 668 if (C.getArgs().hasArg(options::OPT_print_multi_lib)) { 669 // FIXME: We need tool chain support for this. 670 llvm::outs() << ".;\n"; 671 672 switch (C.getDefaultToolChain().getTriple().getArch()) { 673 default: 674 break; 675 676 case llvm::Triple::x86_64: 677 llvm::outs() << "x86_64;@m64" << "\n"; 678 break; 679 680 case llvm::Triple::ppc64: 681 llvm::outs() << "ppc64;@m64" << "\n"; 682 break; 683 } 684 return false; 685 } 686 687 // FIXME: What is the difference between print-multi-directory and 688 // print-multi-os-directory? 689 if (C.getArgs().hasArg(options::OPT_print_multi_directory) || 690 C.getArgs().hasArg(options::OPT_print_multi_os_directory)) { 691 switch (C.getDefaultToolChain().getTriple().getArch()) { 692 default: 693 case llvm::Triple::x86: 694 case llvm::Triple::ppc: 695 llvm::outs() << "." << "\n"; 696 break; 697 698 case llvm::Triple::x86_64: 699 llvm::outs() << "x86_64" << "\n"; 700 break; 701 702 case llvm::Triple::ppc64: 703 llvm::outs() << "ppc64" << "\n"; 704 break; 705 } 706 return false; 707 } 708 709 return true; 710} 711 712static unsigned PrintActions1(const Compilation &C, Action *A, 713 std::map<Action*, unsigned> &Ids) { 714 if (Ids.count(A)) 715 return Ids[A]; 716 717 std::string str; 718 llvm::raw_string_ostream os(str); 719 720 os << Action::getClassName(A->getKind()) << ", "; 721 if (InputAction *IA = dyn_cast<InputAction>(A)) { 722 os << "\"" << IA->getInputArg().getValue(C.getArgs()) << "\""; 723 } else if (BindArchAction *BIA = dyn_cast<BindArchAction>(A)) { 724 os << '"' << (BIA->getArchName() ? BIA->getArchName() : 725 C.getDefaultToolChain().getArchName()) << '"' 726 << ", {" << PrintActions1(C, *BIA->begin(), Ids) << "}"; 727 } else { 728 os << "{"; 729 for (Action::iterator it = A->begin(), ie = A->end(); it != ie;) { 730 os << PrintActions1(C, *it, Ids); 731 ++it; 732 if (it != ie) 733 os << ", "; 734 } 735 os << "}"; 736 } 737 738 unsigned Id = Ids.size(); 739 Ids[A] = Id; 740 llvm::errs() << Id << ": " << os.str() << ", " 741 << types::getTypeName(A->getType()) << "\n"; 742 743 return Id; 744} 745 746void Driver::PrintActions(const Compilation &C) const { 747 std::map<Action*, unsigned> Ids; 748 for (ActionList::const_iterator it = C.getActions().begin(), 749 ie = C.getActions().end(); it != ie; ++it) 750 PrintActions1(C, *it, Ids); 751} 752 753/// \brief Check whether the given input tree contains any compilation or 754/// assembly actions. 755static bool ContainsCompileOrAssembleAction(const Action *A) { 756 if (isa<CompileJobAction>(A) || isa<AssembleJobAction>(A)) 757 return true; 758 759 for (Action::const_iterator it = A->begin(), ie = A->end(); it != ie; ++it) 760 if (ContainsCompileOrAssembleAction(*it)) 761 return true; 762 763 return false; 764} 765 766void Driver::BuildUniversalActions(const ToolChain &TC, 767 const DerivedArgList &Args, 768 const InputList &BAInputs, 769 ActionList &Actions) const { 770 llvm::PrettyStackTraceString CrashInfo("Building universal build actions"); 771 // Collect the list of architectures. Duplicates are allowed, but should only 772 // be handled once (in the order seen). 773 llvm::StringSet<> ArchNames; 774 SmallVector<const char *, 4> Archs; 775 for (ArgList::const_iterator it = Args.begin(), ie = Args.end(); 776 it != ie; ++it) { 777 Arg *A = *it; 778 779 if (A->getOption().matches(options::OPT_arch)) { 780 // Validate the option here; we don't save the type here because its 781 // particular spelling may participate in other driver choices. 782 llvm::Triple::ArchType Arch = 783 llvm::Triple::getArchTypeForDarwinArchName(A->getValue(Args)); 784 if (Arch == llvm::Triple::UnknownArch) { 785 Diag(clang::diag::err_drv_invalid_arch_name) 786 << A->getAsString(Args); 787 continue; 788 } 789 790 A->claim(); 791 if (ArchNames.insert(A->getValue(Args))) 792 Archs.push_back(A->getValue(Args)); 793 } 794 } 795 796 // When there is no explicit arch for this platform, make sure we still bind 797 // the architecture (to the default) so that -Xarch_ is handled correctly. 798 if (!Archs.size()) 799 Archs.push_back(0); 800 801 // FIXME: We killed off some others but these aren't yet detected in a 802 // functional manner. If we added information to jobs about which "auxiliary" 803 // files they wrote then we could detect the conflict these cause downstream. 804 if (Archs.size() > 1) { 805 // No recovery needed, the point of this is just to prevent 806 // overwriting the same files. 807 if (const Arg *A = Args.getLastArg(options::OPT_save_temps)) 808 Diag(clang::diag::err_drv_invalid_opt_with_multiple_archs) 809 << A->getAsString(Args); 810 } 811 812 ActionList SingleActions; 813 BuildActions(TC, Args, BAInputs, SingleActions); 814 815 // Add in arch bindings for every top level action, as well as lipo and 816 // dsymutil steps if needed. 817 for (unsigned i = 0, e = SingleActions.size(); i != e; ++i) { 818 Action *Act = SingleActions[i]; 819 820 // Make sure we can lipo this kind of output. If not (and it is an actual 821 // output) then we disallow, since we can't create an output file with the 822 // right name without overwriting it. We could remove this oddity by just 823 // changing the output names to include the arch, which would also fix 824 // -save-temps. Compatibility wins for now. 825 826 if (Archs.size() > 1 && !types::canLipoType(Act->getType())) 827 Diag(clang::diag::err_drv_invalid_output_with_multiple_archs) 828 << types::getTypeName(Act->getType()); 829 830 ActionList Inputs; 831 for (unsigned i = 0, e = Archs.size(); i != e; ++i) { 832 Inputs.push_back(new BindArchAction(Act, Archs[i])); 833 if (i != 0) 834 Inputs.back()->setOwnsInputs(false); 835 } 836 837 // Lipo if necessary, we do it this way because we need to set the arch flag 838 // so that -Xarch_ gets overwritten. 839 if (Inputs.size() == 1 || Act->getType() == types::TY_Nothing) 840 Actions.append(Inputs.begin(), Inputs.end()); 841 else 842 Actions.push_back(new LipoJobAction(Inputs, Act->getType())); 843 844 // Add a 'dsymutil' step if necessary, when debug info is enabled and we 845 // have a compile input. We need to run 'dsymutil' ourselves in such cases 846 // because the debug info will refer to a temporary object file which is 847 // will be removed at the end of the compilation process. 848 if (Act->getType() == types::TY_Image) { 849 Arg *A = Args.getLastArg(options::OPT_g_Group); 850 if (A && !A->getOption().matches(options::OPT_g0) && 851 !A->getOption().matches(options::OPT_gstabs) && 852 ContainsCompileOrAssembleAction(Actions.back())) { 853 ActionList Inputs; 854 Inputs.push_back(Actions.back()); 855 Actions.pop_back(); 856 857 Actions.push_back(new DsymutilJobAction(Inputs, types::TY_dSYM)); 858 859 // Verify the debug output if we're in assert mode. 860 // TODO: The verifier is noisy by default so put this under an 861 // option for now. 862 #ifndef NDEBUG 863 if (Args.hasArg(options::OPT_verify)) { 864 ActionList VerifyInputs; 865 VerifyInputs.push_back(Actions.back()); 866 Actions.pop_back(); 867 Actions.push_back(new VerifyJobAction(VerifyInputs, 868 types::TY_Nothing)); 869 } 870 #endif 871 } 872 } 873 } 874} 875 876// Construct a the list of inputs and their types. 877void Driver::BuildInputs(const ToolChain &TC, const DerivedArgList &Args, 878 InputList &Inputs) const { 879 // Track the current user specified (-x) input. We also explicitly track the 880 // argument used to set the type; we only want to claim the type when we 881 // actually use it, so we warn about unused -x arguments. 882 types::ID InputType = types::TY_Nothing; 883 Arg *InputTypeArg = 0; 884 885 for (ArgList::const_iterator it = Args.begin(), ie = Args.end(); 886 it != ie; ++it) { 887 Arg *A = *it; 888 889 if (isa<InputOption>(A->getOption())) { 890 const char *Value = A->getValue(Args); 891 types::ID Ty = types::TY_INVALID; 892 893 // Infer the input type if necessary. 894 if (InputType == types::TY_Nothing) { 895 // If there was an explicit arg for this, claim it. 896 if (InputTypeArg) 897 InputTypeArg->claim(); 898 899 // stdin must be handled specially. 900 if (memcmp(Value, "-", 2) == 0) { 901 // If running with -E, treat as a C input (this changes the builtin 902 // macros, for example). This may be overridden by -ObjC below. 903 // 904 // Otherwise emit an error but still use a valid type to avoid 905 // spurious errors (e.g., no inputs). 906 if (!Args.hasArgNoClaim(options::OPT_E) && !CCCIsCPP) 907 Diag(clang::diag::err_drv_unknown_stdin_type); 908 Ty = types::TY_C; 909 } else { 910 // Otherwise lookup by extension. 911 // Fallback is C if invoked as C preprocessor or Object otherwise. 912 // We use a host hook here because Darwin at least has its own 913 // idea of what .s is. 914 if (const char *Ext = strrchr(Value, '.')) 915 Ty = TC.LookupTypeForExtension(Ext + 1); 916 917 if (Ty == types::TY_INVALID) { 918 if (CCCIsCPP) 919 Ty = types::TY_C; 920 else 921 Ty = types::TY_Object; 922 } 923 924 // If the driver is invoked as C++ compiler (like clang++ or c++) it 925 // should autodetect some input files as C++ for g++ compatibility. 926 if (CCCIsCXX) { 927 types::ID OldTy = Ty; 928 Ty = types::lookupCXXTypeForCType(Ty); 929 930 if (Ty != OldTy) 931 Diag(clang::diag::warn_drv_treating_input_as_cxx) 932 << getTypeName(OldTy) << getTypeName(Ty); 933 } 934 } 935 936 // -ObjC and -ObjC++ override the default language, but only for "source 937 // files". We just treat everything that isn't a linker input as a 938 // source file. 939 // 940 // FIXME: Clean this up if we move the phase sequence into the type. 941 if (Ty != types::TY_Object) { 942 if (Args.hasArg(options::OPT_ObjC)) 943 Ty = types::TY_ObjC; 944 else if (Args.hasArg(options::OPT_ObjCXX)) 945 Ty = types::TY_ObjCXX; 946 } 947 } else { 948 assert(InputTypeArg && "InputType set w/o InputTypeArg"); 949 InputTypeArg->claim(); 950 Ty = InputType; 951 } 952 953 // Check that the file exists, if enabled. 954 if (CheckInputsExist && memcmp(Value, "-", 2) != 0) { 955 llvm::SmallString<64> Path(Value); 956 if (Arg *WorkDir = Args.getLastArg(options::OPT_working_directory)) 957 if (llvm::sys::path::is_absolute(Path.str())) { 958 Path = WorkDir->getValue(Args); 959 llvm::sys::path::append(Path, Value); 960 } 961 962 bool exists = false; 963 if (/*error_code ec =*/llvm::sys::fs::exists(Value, exists) || !exists) 964 Diag(clang::diag::err_drv_no_such_file) << Path.str(); 965 else 966 Inputs.push_back(std::make_pair(Ty, A)); 967 } else 968 Inputs.push_back(std::make_pair(Ty, A)); 969 970 } else if (A->getOption().isLinkerInput()) { 971 // Just treat as object type, we could make a special type for this if 972 // necessary. 973 Inputs.push_back(std::make_pair(types::TY_Object, A)); 974 975 } else if (A->getOption().matches(options::OPT_x)) { 976 InputTypeArg = A; 977 InputType = types::lookupTypeForTypeSpecifier(A->getValue(Args)); 978 979 // Follow gcc behavior and treat as linker input for invalid -x 980 // options. Its not clear why we shouldn't just revert to unknown; but 981 // this isn't very important, we might as well be bug compatible. 982 if (!InputType) { 983 Diag(clang::diag::err_drv_unknown_language) << A->getValue(Args); 984 InputType = types::TY_Object; 985 } 986 } 987 } 988 if (CCCIsCPP && Inputs.empty()) { 989 // If called as standalone preprocessor, stdin is processed 990 // if no other input is present. 991 unsigned Index = Args.getBaseArgs().MakeIndex("-"); 992 Arg *A = Opts->ParseOneArg(Args, Index); 993 A->claim(); 994 Inputs.push_back(std::make_pair(types::TY_C, A)); 995 } 996} 997 998void Driver::BuildActions(const ToolChain &TC, const DerivedArgList &Args, 999 const InputList &Inputs, ActionList &Actions) const { 1000 llvm::PrettyStackTraceString CrashInfo("Building compilation actions"); 1001 1002 if (!SuppressMissingInputWarning && Inputs.empty()) { 1003 Diag(clang::diag::err_drv_no_input_files); 1004 return; 1005 } 1006 1007 Arg *FinalPhaseArg; 1008 phases::ID FinalPhase = getFinalPhase(Args, &FinalPhaseArg); 1009 1010 // Reject -Z* at the top level, these options should never have been exposed 1011 // by gcc. 1012 if (Arg *A = Args.getLastArg(options::OPT_Z_Joined)) 1013 Diag(clang::diag::err_drv_use_of_Z_option) << A->getAsString(Args); 1014 1015 // Construct the actions to perform. 1016 ActionList LinkerInputs; 1017 unsigned NumSteps = 0; 1018 for (unsigned i = 0, e = Inputs.size(); i != e; ++i) { 1019 types::ID InputType = Inputs[i].first; 1020 const Arg *InputArg = Inputs[i].second; 1021 1022 NumSteps = types::getNumCompilationPhases(InputType); 1023 assert(NumSteps && "Invalid number of steps!"); 1024 1025 // If the first step comes after the final phase we are doing as part of 1026 // this compilation, warn the user about it. 1027 phases::ID InitialPhase = types::getCompilationPhase(InputType, 0); 1028 if (InitialPhase > FinalPhase) { 1029 // Claim here to avoid the more general unused warning. 1030 InputArg->claim(); 1031 1032 // Suppress all unused style warnings with -Qunused-arguments 1033 if (Args.hasArg(options::OPT_Qunused_arguments)) 1034 continue; 1035 1036 // Special case '-E' warning on a previously preprocessed file to make 1037 // more sense. 1038 if (InitialPhase == phases::Compile && FinalPhase == phases::Preprocess && 1039 getPreprocessedType(InputType) == types::TY_INVALID) 1040 Diag(clang::diag::warn_drv_preprocessed_input_file_unused) 1041 << InputArg->getAsString(Args) 1042 << FinalPhaseArg->getOption().getName(); 1043 else 1044 Diag(clang::diag::warn_drv_input_file_unused) 1045 << InputArg->getAsString(Args) 1046 << getPhaseName(InitialPhase) 1047 << FinalPhaseArg->getOption().getName(); 1048 continue; 1049 } 1050 1051 // Build the pipeline for this file. 1052 llvm::OwningPtr<Action> Current(new InputAction(*InputArg, InputType)); 1053 for (unsigned i = 0; i != NumSteps; ++i) { 1054 phases::ID Phase = types::getCompilationPhase(InputType, i); 1055 1056 // We are done if this step is past what the user requested. 1057 if (Phase > FinalPhase) 1058 break; 1059 1060 // Queue linker inputs. 1061 if (Phase == phases::Link) { 1062 assert(i + 1 == NumSteps && "linking must be final compilation step."); 1063 LinkerInputs.push_back(Current.take()); 1064 break; 1065 } 1066 1067 // Some types skip the assembler phase (e.g., llvm-bc), but we can't 1068 // encode this in the steps because the intermediate type depends on 1069 // arguments. Just special case here. 1070 if (Phase == phases::Assemble && Current->getType() != types::TY_PP_Asm) 1071 continue; 1072 1073 // Otherwise construct the appropriate action. 1074 Current.reset(ConstructPhaseAction(Args, Phase, Current.take())); 1075 if (Current->getType() == types::TY_Nothing) 1076 break; 1077 } 1078 1079 // If we ended with something, add to the output list. 1080 if (Current) 1081 Actions.push_back(Current.take()); 1082 } 1083 1084 // Add a link action if necessary. 1085 if (!LinkerInputs.empty()) 1086 Actions.push_back(new LinkJobAction(LinkerInputs, types::TY_Image)); 1087 1088 // If we are linking, claim any options which are obviously only used for 1089 // compilation. 1090 if (FinalPhase == phases::Link && (NumSteps == 1)) 1091 Args.ClaimAllArgs(options::OPT_CompileOnly_Group); 1092} 1093 1094Action *Driver::ConstructPhaseAction(const ArgList &Args, phases::ID Phase, 1095 Action *Input) const { 1096 llvm::PrettyStackTraceString CrashInfo("Constructing phase actions"); 1097 // Build the appropriate action. 1098 switch (Phase) { 1099 case phases::Link: llvm_unreachable("link action invalid here."); 1100 case phases::Preprocess: { 1101 types::ID OutputTy; 1102 // -{M, MM} alter the output type. 1103 if (Args.hasArg(options::OPT_M, options::OPT_MM)) { 1104 OutputTy = types::TY_Dependencies; 1105 } else { 1106 OutputTy = types::getPreprocessedType(Input->getType()); 1107 assert(OutputTy != types::TY_INVALID && 1108 "Cannot preprocess this input type!"); 1109 } 1110 return new PreprocessJobAction(Input, OutputTy); 1111 } 1112 case phases::Precompile: 1113 return new PrecompileJobAction(Input, types::TY_PCH); 1114 case phases::Compile: { 1115 if (Args.hasArg(options::OPT_fsyntax_only)) { 1116 return new CompileJobAction(Input, types::TY_Nothing); 1117 } else if (Args.hasArg(options::OPT_rewrite_objc)) { 1118 return new CompileJobAction(Input, types::TY_RewrittenObjC); 1119 } else if (Args.hasArg(options::OPT__analyze, options::OPT__analyze_auto)) { 1120 return new AnalyzeJobAction(Input, types::TY_Plist); 1121 } else if (Args.hasArg(options::OPT_emit_ast)) { 1122 return new CompileJobAction(Input, types::TY_AST); 1123 } else if (IsUsingLTO(Args)) { 1124 types::ID Output = 1125 Args.hasArg(options::OPT_S) ? types::TY_LTO_IR : types::TY_LTO_BC; 1126 return new CompileJobAction(Input, Output); 1127 } else { 1128 return new CompileJobAction(Input, types::TY_PP_Asm); 1129 } 1130 } 1131 case phases::Assemble: 1132 return new AssembleJobAction(Input, types::TY_Object); 1133 } 1134 1135 llvm_unreachable("invalid phase in ConstructPhaseAction"); 1136} 1137 1138bool Driver::IsUsingLTO(const ArgList &Args) const { 1139 // Check for -emit-llvm or -flto. 1140 if (Args.hasArg(options::OPT_emit_llvm) || 1141 Args.hasFlag(options::OPT_flto, options::OPT_fno_lto, false)) 1142 return true; 1143 1144 // Check for -O4. 1145 if (const Arg *A = Args.getLastArg(options::OPT_O_Group)) 1146 return A->getOption().matches(options::OPT_O4); 1147 1148 return false; 1149} 1150 1151void Driver::BuildJobs(Compilation &C) const { 1152 llvm::PrettyStackTraceString CrashInfo("Building compilation jobs"); 1153 1154 Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o); 1155 1156 // It is an error to provide a -o option if we are making multiple output 1157 // files. 1158 if (FinalOutput) { 1159 unsigned NumOutputs = 0; 1160 for (ActionList::const_iterator it = C.getActions().begin(), 1161 ie = C.getActions().end(); it != ie; ++it) 1162 if ((*it)->getType() != types::TY_Nothing) 1163 ++NumOutputs; 1164 1165 if (NumOutputs > 1) { 1166 Diag(clang::diag::err_drv_output_argument_with_multiple_files); 1167 FinalOutput = 0; 1168 } 1169 } 1170 1171 for (ActionList::const_iterator it = C.getActions().begin(), 1172 ie = C.getActions().end(); it != ie; ++it) { 1173 Action *A = *it; 1174 1175 // If we are linking an image for multiple archs then the linker wants 1176 // -arch_multiple and -final_output <final image name>. Unfortunately, this 1177 // doesn't fit in cleanly because we have to pass this information down. 1178 // 1179 // FIXME: This is a hack; find a cleaner way to integrate this into the 1180 // process. 1181 const char *LinkingOutput = 0; 1182 if (isa<LipoJobAction>(A)) { 1183 if (FinalOutput) 1184 LinkingOutput = FinalOutput->getValue(C.getArgs()); 1185 else 1186 LinkingOutput = DefaultImageName.c_str(); 1187 } 1188 1189 InputInfo II; 1190 BuildJobsForAction(C, A, &C.getDefaultToolChain(), 1191 /*BoundArch*/0, 1192 /*AtTopLevel*/ true, 1193 /*LinkingOutput*/ LinkingOutput, 1194 II); 1195 } 1196 1197 // If the user passed -Qunused-arguments or there were errors, don't warn 1198 // about any unused arguments. 1199 if (Diags.hasErrorOccurred() || 1200 C.getArgs().hasArg(options::OPT_Qunused_arguments)) 1201 return; 1202 1203 // Claim -### here. 1204 (void) C.getArgs().hasArg(options::OPT__HASH_HASH_HASH); 1205 1206 for (ArgList::const_iterator it = C.getArgs().begin(), ie = C.getArgs().end(); 1207 it != ie; ++it) { 1208 Arg *A = *it; 1209 1210 // FIXME: It would be nice to be able to send the argument to the 1211 // DiagnosticsEngine, so that extra values, position, and so on could be 1212 // printed. 1213 if (!A->isClaimed()) { 1214 if (A->getOption().hasNoArgumentUnused()) 1215 continue; 1216 1217 // Suppress the warning automatically if this is just a flag, and it is an 1218 // instance of an argument we already claimed. 1219 const Option &Opt = A->getOption(); 1220 if (isa<FlagOption>(Opt)) { 1221 bool DuplicateClaimed = false; 1222 1223 for (arg_iterator it = C.getArgs().filtered_begin(&Opt), 1224 ie = C.getArgs().filtered_end(); it != ie; ++it) { 1225 if ((*it)->isClaimed()) { 1226 DuplicateClaimed = true; 1227 break; 1228 } 1229 } 1230 1231 if (DuplicateClaimed) 1232 continue; 1233 } 1234 1235 Diag(clang::diag::warn_drv_unused_argument) 1236 << A->getAsString(C.getArgs()); 1237 } 1238 } 1239} 1240 1241static const Tool &SelectToolForJob(Compilation &C, const ToolChain *TC, 1242 const JobAction *JA, 1243 const ActionList *&Inputs) { 1244 const Tool *ToolForJob = 0; 1245 1246 // See if we should look for a compiler with an integrated assembler. We match 1247 // bottom up, so what we are actually looking for is an assembler job with a 1248 // compiler input. 1249 1250 if (C.getArgs().hasFlag(options::OPT_integrated_as, 1251 options::OPT_no_integrated_as, 1252 TC->IsIntegratedAssemblerDefault()) && 1253 !C.getArgs().hasArg(options::OPT_save_temps) && 1254 isa<AssembleJobAction>(JA) && 1255 Inputs->size() == 1 && isa<CompileJobAction>(*Inputs->begin())) { 1256 const Tool &Compiler = TC->SelectTool( 1257 C, cast<JobAction>(**Inputs->begin()), (*Inputs)[0]->getInputs()); 1258 if (Compiler.hasIntegratedAssembler()) { 1259 Inputs = &(*Inputs)[0]->getInputs(); 1260 ToolForJob = &Compiler; 1261 } 1262 } 1263 1264 // Otherwise use the tool for the current job. 1265 if (!ToolForJob) 1266 ToolForJob = &TC->SelectTool(C, *JA, *Inputs); 1267 1268 // See if we should use an integrated preprocessor. We do so when we have 1269 // exactly one input, since this is the only use case we care about 1270 // (irrelevant since we don't support combine yet). 1271 if (Inputs->size() == 1 && isa<PreprocessJobAction>(*Inputs->begin()) && 1272 !C.getArgs().hasArg(options::OPT_no_integrated_cpp) && 1273 !C.getArgs().hasArg(options::OPT_traditional_cpp) && 1274 !C.getArgs().hasArg(options::OPT_save_temps) && 1275 ToolForJob->hasIntegratedCPP()) 1276 Inputs = &(*Inputs)[0]->getInputs(); 1277 1278 return *ToolForJob; 1279} 1280 1281void Driver::BuildJobsForAction(Compilation &C, 1282 const Action *A, 1283 const ToolChain *TC, 1284 const char *BoundArch, 1285 bool AtTopLevel, 1286 const char *LinkingOutput, 1287 InputInfo &Result) const { 1288 llvm::PrettyStackTraceString CrashInfo("Building compilation jobs"); 1289 1290 if (const InputAction *IA = dyn_cast<InputAction>(A)) { 1291 // FIXME: It would be nice to not claim this here; maybe the old scheme of 1292 // just using Args was better? 1293 const Arg &Input = IA->getInputArg(); 1294 Input.claim(); 1295 if (Input.getOption().matches(options::OPT_INPUT)) { 1296 const char *Name = Input.getValue(C.getArgs()); 1297 Result = InputInfo(Name, A->getType(), Name); 1298 } else 1299 Result = InputInfo(&Input, A->getType(), ""); 1300 return; 1301 } 1302 1303 if (const BindArchAction *BAA = dyn_cast<BindArchAction>(A)) { 1304 const ToolChain *TC = &C.getDefaultToolChain(); 1305 1306 std::string Arch; 1307 if (BAA->getArchName()) 1308 TC = Host->CreateToolChain(C.getArgs(), BAA->getArchName()); 1309 1310 BuildJobsForAction(C, *BAA->begin(), TC, BAA->getArchName(), 1311 AtTopLevel, LinkingOutput, Result); 1312 return; 1313 } 1314 1315 const ActionList *Inputs = &A->getInputs(); 1316 1317 const JobAction *JA = cast<JobAction>(A); 1318 const Tool &T = SelectToolForJob(C, TC, JA, Inputs); 1319 1320 // Only use pipes when there is exactly one input. 1321 InputInfoList InputInfos; 1322 for (ActionList::const_iterator it = Inputs->begin(), ie = Inputs->end(); 1323 it != ie; ++it) { 1324 // Treat dsymutil sub-jobs as being at the top-level too, they shouldn't get 1325 // temporary output names. 1326 // 1327 // FIXME: Clean this up. 1328 bool SubJobAtTopLevel = false; 1329 if (AtTopLevel && isa<DsymutilJobAction>(A)) 1330 SubJobAtTopLevel = true; 1331 1332 // Also treat verify sub-jobs as being at the top-level. They don't 1333 // produce any output and so don't need temporary output names. 1334 if (AtTopLevel && isa<VerifyJobAction>(A)) 1335 SubJobAtTopLevel = true; 1336 1337 InputInfo II; 1338 BuildJobsForAction(C, *it, TC, BoundArch, 1339 SubJobAtTopLevel, LinkingOutput, II); 1340 InputInfos.push_back(II); 1341 } 1342 1343 // Always use the first input as the base input. 1344 const char *BaseInput = InputInfos[0].getBaseInput(); 1345 1346 // ... except dsymutil actions, which use their actual input as the base 1347 // input. 1348 if (JA->getType() == types::TY_dSYM) 1349 BaseInput = InputInfos[0].getFilename(); 1350 1351 // Determine the place to write output to, if any. 1352 if (JA->getType() == types::TY_Nothing) { 1353 Result = InputInfo(A->getType(), BaseInput); 1354 } else { 1355 Result = InputInfo(GetNamedOutputPath(C, *JA, BaseInput, AtTopLevel), 1356 A->getType(), BaseInput); 1357 } 1358 1359 if (CCCPrintBindings && !CCGenDiagnostics) { 1360 llvm::errs() << "# \"" << T.getToolChain().getTripleString() << '"' 1361 << " - \"" << T.getName() << "\", inputs: ["; 1362 for (unsigned i = 0, e = InputInfos.size(); i != e; ++i) { 1363 llvm::errs() << InputInfos[i].getAsString(); 1364 if (i + 1 != e) 1365 llvm::errs() << ", "; 1366 } 1367 llvm::errs() << "], output: " << Result.getAsString() << "\n"; 1368 } else { 1369 T.ConstructJob(C, *JA, Result, InputInfos, 1370 C.getArgsForToolChain(TC, BoundArch), LinkingOutput); 1371 } 1372} 1373 1374const char *Driver::GetNamedOutputPath(Compilation &C, 1375 const JobAction &JA, 1376 const char *BaseInput, 1377 bool AtTopLevel) const { 1378 llvm::PrettyStackTraceString CrashInfo("Computing output path"); 1379 // Output to a user requested destination? 1380 if (AtTopLevel && !isa<DsymutilJobAction>(JA) && 1381 !isa<VerifyJobAction>(JA)) { 1382 if (Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o)) 1383 return C.addResultFile(FinalOutput->getValue(C.getArgs())); 1384 } 1385 1386 // Default to writing to stdout? 1387 if (AtTopLevel && isa<PreprocessJobAction>(JA) && !CCGenDiagnostics) 1388 return "-"; 1389 1390 // Output to a temporary file? 1391 if ((!AtTopLevel && !C.getArgs().hasArg(options::OPT_save_temps)) || 1392 CCGenDiagnostics) { 1393 StringRef Name = llvm::sys::path::filename(BaseInput); 1394 std::pair<StringRef, StringRef> Split = Name.split('.'); 1395 std::string TmpName = 1396 GetTemporaryPath(Split.first, types::getTypeTempSuffix(JA.getType())); 1397 return C.addTempFile(C.getArgs().MakeArgString(TmpName.c_str())); 1398 } 1399 1400 llvm::SmallString<128> BasePath(BaseInput); 1401 StringRef BaseName; 1402 1403 // Dsymutil actions should use the full path. 1404 if (isa<DsymutilJobAction>(JA) || isa<VerifyJobAction>(JA)) 1405 BaseName = BasePath; 1406 else 1407 BaseName = llvm::sys::path::filename(BasePath); 1408 1409 // Determine what the derived output name should be. 1410 const char *NamedOutput; 1411 if (JA.getType() == types::TY_Image) { 1412 NamedOutput = DefaultImageName.c_str(); 1413 } else { 1414 const char *Suffix = types::getTypeTempSuffix(JA.getType()); 1415 assert(Suffix && "All types used for output should have a suffix."); 1416 1417 std::string::size_type End = std::string::npos; 1418 if (!types::appendSuffixForType(JA.getType())) 1419 End = BaseName.rfind('.'); 1420 std::string Suffixed(BaseName.substr(0, End)); 1421 Suffixed += '.'; 1422 Suffixed += Suffix; 1423 NamedOutput = C.getArgs().MakeArgString(Suffixed.c_str()); 1424 } 1425 1426 // If we're saving temps and the temp filename conflicts with the input 1427 // filename, then avoid overwriting input file. 1428 if (!AtTopLevel && C.getArgs().hasArg(options::OPT_save_temps) && 1429 NamedOutput == BaseName) { 1430 StringRef Name = llvm::sys::path::filename(BaseInput); 1431 std::pair<StringRef, StringRef> Split = Name.split('.'); 1432 std::string TmpName = 1433 GetTemporaryPath(Split.first, types::getTypeTempSuffix(JA.getType())); 1434 return C.addTempFile(C.getArgs().MakeArgString(TmpName.c_str())); 1435 } 1436 1437 // As an annoying special case, PCH generation doesn't strip the pathname. 1438 if (JA.getType() == types::TY_PCH) { 1439 llvm::sys::path::remove_filename(BasePath); 1440 if (BasePath.empty()) 1441 BasePath = NamedOutput; 1442 else 1443 llvm::sys::path::append(BasePath, NamedOutput); 1444 return C.addResultFile(C.getArgs().MakeArgString(BasePath.c_str())); 1445 } else { 1446 return C.addResultFile(NamedOutput); 1447 } 1448} 1449 1450std::string Driver::GetFilePath(const char *Name, const ToolChain &TC) const { 1451 // Respect a limited subset of the '-Bprefix' functionality in GCC by 1452 // attempting to use this prefix when lokup up program paths. 1453 for (Driver::prefix_list::const_iterator it = PrefixDirs.begin(), 1454 ie = PrefixDirs.end(); it != ie; ++it) { 1455 std::string Dir(*it); 1456 if (Dir.empty()) 1457 continue; 1458 if (Dir[0] == '=') 1459 Dir = SysRoot + Dir.substr(1); 1460 llvm::sys::Path P(Dir); 1461 P.appendComponent(Name); 1462 bool Exists; 1463 if (!llvm::sys::fs::exists(P.str(), Exists) && Exists) 1464 return P.str(); 1465 } 1466 1467 llvm::sys::Path P(ResourceDir); 1468 P.appendComponent(Name); 1469 bool Exists; 1470 if (!llvm::sys::fs::exists(P.str(), Exists) && Exists) 1471 return P.str(); 1472 1473 const ToolChain::path_list &List = TC.getFilePaths(); 1474 for (ToolChain::path_list::const_iterator 1475 it = List.begin(), ie = List.end(); it != ie; ++it) { 1476 std::string Dir(*it); 1477 if (Dir.empty()) 1478 continue; 1479 if (Dir[0] == '=') 1480 Dir = SysRoot + Dir.substr(1); 1481 llvm::sys::Path P(Dir); 1482 P.appendComponent(Name); 1483 bool Exists; 1484 if (!llvm::sys::fs::exists(P.str(), Exists) && Exists) 1485 return P.str(); 1486 } 1487 1488 return Name; 1489} 1490 1491static bool isPathExecutable(llvm::sys::Path &P, bool WantFile) { 1492 bool Exists; 1493 return (WantFile ? !llvm::sys::fs::exists(P.str(), Exists) && Exists 1494 : P.canExecute()); 1495} 1496 1497std::string Driver::GetProgramPath(const char *Name, const ToolChain &TC, 1498 bool WantFile) const { 1499 std::string TargetSpecificExecutable(DefaultHostTriple + "-" + Name); 1500 // Respect a limited subset of the '-Bprefix' functionality in GCC by 1501 // attempting to use this prefix when lokup up program paths. 1502 for (Driver::prefix_list::const_iterator it = PrefixDirs.begin(), 1503 ie = PrefixDirs.end(); it != ie; ++it) { 1504 llvm::sys::Path P(*it); 1505 P.appendComponent(TargetSpecificExecutable); 1506 if (isPathExecutable(P, WantFile)) return P.str(); 1507 P.eraseComponent(); 1508 P.appendComponent(Name); 1509 if (isPathExecutable(P, WantFile)) return P.str(); 1510 } 1511 1512 const ToolChain::path_list &List = TC.getProgramPaths(); 1513 for (ToolChain::path_list::const_iterator 1514 it = List.begin(), ie = List.end(); it != ie; ++it) { 1515 llvm::sys::Path P(*it); 1516 P.appendComponent(TargetSpecificExecutable); 1517 if (isPathExecutable(P, WantFile)) return P.str(); 1518 P.eraseComponent(); 1519 P.appendComponent(Name); 1520 if (isPathExecutable(P, WantFile)) return P.str(); 1521 } 1522 1523 // If all else failed, search the path. 1524 llvm::sys::Path 1525 P(llvm::sys::Program::FindProgramByName(TargetSpecificExecutable)); 1526 if (!P.empty()) 1527 return P.str(); 1528 1529 P = llvm::sys::Path(llvm::sys::Program::FindProgramByName(Name)); 1530 if (!P.empty()) 1531 return P.str(); 1532 1533 return Name; 1534} 1535 1536std::string Driver::GetTemporaryPath(StringRef Prefix, const char *Suffix) 1537 const { 1538 // FIXME: This is lame; sys::Path should provide this function (in particular, 1539 // it should know how to find the temporary files dir). 1540 std::string Error; 1541 const char *TmpDir = ::getenv("TMPDIR"); 1542 if (!TmpDir) 1543 TmpDir = ::getenv("TEMP"); 1544 if (!TmpDir) 1545 TmpDir = ::getenv("TMP"); 1546 if (!TmpDir) 1547 TmpDir = "/tmp"; 1548 llvm::sys::Path P(TmpDir); 1549 P.appendComponent(Prefix); 1550 if (P.makeUnique(false, &Error)) { 1551 Diag(clang::diag::err_drv_unable_to_make_temp) << Error; 1552 return ""; 1553 } 1554 1555 // FIXME: Grumble, makeUnique sometimes leaves the file around!? PR3837. 1556 P.eraseFromDisk(false, 0); 1557 1558 P.appendSuffix(Suffix); 1559 return P.str(); 1560} 1561 1562const HostInfo *Driver::GetHostInfo(const char *TripleStr) const { 1563 llvm::PrettyStackTraceString CrashInfo("Constructing host"); 1564 llvm::Triple Triple(llvm::Triple::normalize(TripleStr).c_str()); 1565 1566 // TCE is an osless target 1567 if (Triple.getArchName() == "tce") 1568 return createTCEHostInfo(*this, Triple); 1569 1570 switch (Triple.getOS()) { 1571 case llvm::Triple::AuroraUX: 1572 return createAuroraUXHostInfo(*this, Triple); 1573 case llvm::Triple::Darwin: 1574 case llvm::Triple::MacOSX: 1575 case llvm::Triple::IOS: 1576 return createDarwinHostInfo(*this, Triple); 1577 case llvm::Triple::DragonFly: 1578 return createDragonFlyHostInfo(*this, Triple); 1579 case llvm::Triple::OpenBSD: 1580 return createOpenBSDHostInfo(*this, Triple); 1581 case llvm::Triple::NetBSD: 1582 return createNetBSDHostInfo(*this, Triple); 1583 case llvm::Triple::FreeBSD: 1584 return createFreeBSDHostInfo(*this, Triple); 1585 case llvm::Triple::Minix: 1586 return createMinixHostInfo(*this, Triple); 1587 case llvm::Triple::Linux: 1588 return createLinuxHostInfo(*this, Triple); 1589 case llvm::Triple::Win32: 1590 return createWindowsHostInfo(*this, Triple); 1591 case llvm::Triple::MinGW32: 1592 return createMinGWHostInfo(*this, Triple); 1593 default: 1594 return createUnknownHostInfo(*this, Triple); 1595 } 1596} 1597 1598bool Driver::ShouldUseClangCompiler(const Compilation &C, const JobAction &JA, 1599 const llvm::Triple &Triple) const { 1600 // Check if user requested no clang, or clang doesn't understand this type (we 1601 // only handle single inputs for now). 1602 if (!CCCUseClang || JA.size() != 1 || 1603 !types::isAcceptedByClang((*JA.begin())->getType())) 1604 return false; 1605 1606 // Otherwise make sure this is an action clang understands. 1607 if (isa<PreprocessJobAction>(JA)) { 1608 if (!CCCUseClangCPP) { 1609 Diag(clang::diag::warn_drv_not_using_clang_cpp); 1610 return false; 1611 } 1612 } else if (!isa<PrecompileJobAction>(JA) && !isa<CompileJobAction>(JA)) 1613 return false; 1614 1615 // Use clang for C++? 1616 if (!CCCUseClangCXX && types::isCXX((*JA.begin())->getType())) { 1617 Diag(clang::diag::warn_drv_not_using_clang_cxx); 1618 return false; 1619 } 1620 1621 // Always use clang for precompiling, AST generation, and rewriting, 1622 // regardless of archs. 1623 if (isa<PrecompileJobAction>(JA) || 1624 types::isOnlyAcceptedByClang(JA.getType())) 1625 return true; 1626 1627 // Finally, don't use clang if this isn't one of the user specified archs to 1628 // build. 1629 if (!CCCClangArchs.empty() && !CCCClangArchs.count(Triple.getArch())) { 1630 Diag(clang::diag::warn_drv_not_using_clang_arch) << Triple.getArchName(); 1631 return false; 1632 } 1633 1634 return true; 1635} 1636 1637/// GetReleaseVersion - Parse (([0-9]+)(.([0-9]+)(.([0-9]+)?))?)? and return the 1638/// grouped values as integers. Numbers which are not provided are set to 0. 1639/// 1640/// \return True if the entire string was parsed (9.2), or all groups were 1641/// parsed (10.3.5extrastuff). 1642bool Driver::GetReleaseVersion(const char *Str, unsigned &Major, 1643 unsigned &Minor, unsigned &Micro, 1644 bool &HadExtra) { 1645 HadExtra = false; 1646 1647 Major = Minor = Micro = 0; 1648 if (*Str == '\0') 1649 return true; 1650 1651 char *End; 1652 Major = (unsigned) strtol(Str, &End, 10); 1653 if (*Str != '\0' && *End == '\0') 1654 return true; 1655 if (*End != '.') 1656 return false; 1657 1658 Str = End+1; 1659 Minor = (unsigned) strtol(Str, &End, 10); 1660 if (*Str != '\0' && *End == '\0') 1661 return true; 1662 if (*End != '.') 1663 return false; 1664 1665 Str = End+1; 1666 Micro = (unsigned) strtol(Str, &End, 10); 1667 if (*Str != '\0' && *End == '\0') 1668 return true; 1669 if (Str == End) 1670 return false; 1671 HadExtra = true; 1672 return true; 1673} 1674