1//===--- DiagnosticIDs.cpp - Diagnostic IDs Handling ----------------------===// 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// This file implements the Diagnostic IDs-related interfaces. 11// 12//===----------------------------------------------------------------------===// 13 14#include "clang/Basic/DiagnosticIDs.h" 15#include "clang/Basic/AllDiagnostics.h" 16#include "clang/Basic/DiagnosticCategories.h" 17#include "clang/Basic/SourceManager.h" 18#include "llvm/ADT/STLExtras.h" 19#include "llvm/ADT/SmallVector.h" 20#include "llvm/Support/ErrorHandling.h" 21#include <map> 22using namespace clang; 23 24//===----------------------------------------------------------------------===// 25// Builtin Diagnostic information 26//===----------------------------------------------------------------------===// 27 28namespace { 29 30// Diagnostic classes. 31enum { 32 CLASS_NOTE = 0x01, 33 CLASS_REMARK = 0x02, 34 CLASS_WARNING = 0x03, 35 CLASS_EXTENSION = 0x04, 36 CLASS_ERROR = 0x05 37}; 38 39struct StaticDiagInfoRec { 40 uint16_t DiagID; 41 unsigned DefaultSeverity : 3; 42 unsigned Class : 3; 43 unsigned SFINAE : 2; 44 unsigned WarnNoWerror : 1; 45 unsigned WarnShowInSystemHeader : 1; 46 unsigned Category : 5; 47 48 uint16_t OptionGroupIndex; 49 50 uint16_t DescriptionLen; 51 const char *DescriptionStr; 52 53 unsigned getOptionGroupIndex() const { 54 return OptionGroupIndex; 55 } 56 57 StringRef getDescription() const { 58 return StringRef(DescriptionStr, DescriptionLen); 59 } 60 61 bool operator<(const StaticDiagInfoRec &RHS) const { 62 return DiagID < RHS.DiagID; 63 } 64}; 65 66} // namespace anonymous 67 68static const StaticDiagInfoRec StaticDiagInfo[] = { 69#define DIAG(ENUM, CLASS, DEFAULT_SEVERITY, DESC, GROUP, SFINAE, NOWERROR, \ 70 SHOWINSYSHEADER, CATEGORY) \ 71 { \ 72 diag::ENUM, DEFAULT_SEVERITY, CLASS, DiagnosticIDs::SFINAE, NOWERROR, \ 73 SHOWINSYSHEADER, CATEGORY, GROUP, STR_SIZE(DESC, uint16_t), DESC \ 74 } \ 75 , 76#include "clang/Basic/DiagnosticCommonKinds.inc" 77#include "clang/Basic/DiagnosticDriverKinds.inc" 78#include "clang/Basic/DiagnosticFrontendKinds.inc" 79#include "clang/Basic/DiagnosticSerializationKinds.inc" 80#include "clang/Basic/DiagnosticLexKinds.inc" 81#include "clang/Basic/DiagnosticParseKinds.inc" 82#include "clang/Basic/DiagnosticASTKinds.inc" 83#include "clang/Basic/DiagnosticCommentKinds.inc" 84#include "clang/Basic/DiagnosticSemaKinds.inc" 85#include "clang/Basic/DiagnosticAnalysisKinds.inc" 86#undef DIAG 87}; 88 89static const unsigned StaticDiagInfoSize = llvm::array_lengthof(StaticDiagInfo); 90 91/// GetDiagInfo - Return the StaticDiagInfoRec entry for the specified DiagID, 92/// or null if the ID is invalid. 93static const StaticDiagInfoRec *GetDiagInfo(unsigned DiagID) { 94 // If assertions are enabled, verify that the StaticDiagInfo array is sorted. 95#ifndef NDEBUG 96 static bool IsFirst = true; // So the check is only performed on first call. 97 if (IsFirst) { 98 for (unsigned i = 1; i != StaticDiagInfoSize; ++i) { 99 assert(StaticDiagInfo[i-1].DiagID != StaticDiagInfo[i].DiagID && 100 "Diag ID conflict, the enums at the start of clang::diag (in " 101 "DiagnosticIDs.h) probably need to be increased"); 102 103 assert(StaticDiagInfo[i-1] < StaticDiagInfo[i] && 104 "Improperly sorted diag info"); 105 } 106 IsFirst = false; 107 } 108#endif 109 110 // Out of bounds diag. Can't be in the table. 111 using namespace diag; 112 if (DiagID >= DIAG_UPPER_LIMIT || DiagID <= DIAG_START_COMMON) 113 return nullptr; 114 115 // Compute the index of the requested diagnostic in the static table. 116 // 1. Add the number of diagnostics in each category preceding the 117 // diagnostic and of the category the diagnostic is in. This gives us 118 // the offset of the category in the table. 119 // 2. Subtract the number of IDs in each category from our ID. This gives us 120 // the offset of the diagnostic in the category. 121 // This is cheaper than a binary search on the table as it doesn't touch 122 // memory at all. 123 unsigned Offset = 0; 124 unsigned ID = DiagID - DIAG_START_COMMON - 1; 125#define CATEGORY(NAME, PREV) \ 126 if (DiagID > DIAG_START_##NAME) { \ 127 Offset += NUM_BUILTIN_##PREV##_DIAGNOSTICS - DIAG_START_##PREV - 1; \ 128 ID -= DIAG_START_##NAME - DIAG_START_##PREV; \ 129 } 130CATEGORY(DRIVER, COMMON) 131CATEGORY(FRONTEND, DRIVER) 132CATEGORY(SERIALIZATION, FRONTEND) 133CATEGORY(LEX, SERIALIZATION) 134CATEGORY(PARSE, LEX) 135CATEGORY(AST, PARSE) 136CATEGORY(COMMENT, AST) 137CATEGORY(SEMA, COMMENT) 138CATEGORY(ANALYSIS, SEMA) 139#undef CATEGORY 140 141 // Avoid out of bounds reads. 142 if (ID + Offset >= StaticDiagInfoSize) 143 return nullptr; 144 145 assert(ID < StaticDiagInfoSize && Offset < StaticDiagInfoSize); 146 147 const StaticDiagInfoRec *Found = &StaticDiagInfo[ID + Offset]; 148 // If the diag id doesn't match we found a different diag, abort. This can 149 // happen when this function is called with an ID that points into a hole in 150 // the diagID space. 151 if (Found->DiagID != DiagID) 152 return nullptr; 153 return Found; 154} 155 156static DiagnosticMapping GetDefaultDiagMapping(unsigned DiagID) { 157 DiagnosticMapping Info = DiagnosticMapping::Make( 158 diag::Severity::Fatal, /*IsUser=*/false, /*IsPragma=*/false); 159 160 if (const StaticDiagInfoRec *StaticInfo = GetDiagInfo(DiagID)) { 161 Info.setSeverity((diag::Severity)StaticInfo->DefaultSeverity); 162 163 if (StaticInfo->WarnNoWerror) { 164 assert(Info.getSeverity() == diag::Severity::Warning && 165 "Unexpected mapping with no-Werror bit!"); 166 Info.setNoWarningAsError(true); 167 } 168 } 169 170 return Info; 171} 172 173/// getCategoryNumberForDiag - Return the category number that a specified 174/// DiagID belongs to, or 0 if no category. 175unsigned DiagnosticIDs::getCategoryNumberForDiag(unsigned DiagID) { 176 if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID)) 177 return Info->Category; 178 return 0; 179} 180 181namespace { 182 // The diagnostic category names. 183 struct StaticDiagCategoryRec { 184 const char *NameStr; 185 uint8_t NameLen; 186 187 StringRef getName() const { 188 return StringRef(NameStr, NameLen); 189 } 190 }; 191} 192 193// Unfortunately, the split between DiagnosticIDs and Diagnostic is not 194// particularly clean, but for now we just implement this method here so we can 195// access GetDefaultDiagMapping. 196DiagnosticMapping & 197DiagnosticsEngine::DiagState::getOrAddMapping(diag::kind Diag) { 198 std::pair<iterator, bool> Result = 199 DiagMap.insert(std::make_pair(Diag, DiagnosticMapping())); 200 201 // Initialize the entry if we added it. 202 if (Result.second) 203 Result.first->second = GetDefaultDiagMapping(Diag); 204 205 return Result.first->second; 206} 207 208static const StaticDiagCategoryRec CategoryNameTable[] = { 209#define GET_CATEGORY_TABLE 210#define CATEGORY(X, ENUM) { X, STR_SIZE(X, uint8_t) }, 211#include "clang/Basic/DiagnosticGroups.inc" 212#undef GET_CATEGORY_TABLE 213 { nullptr, 0 } 214}; 215 216/// getNumberOfCategories - Return the number of categories 217unsigned DiagnosticIDs::getNumberOfCategories() { 218 return llvm::array_lengthof(CategoryNameTable) - 1; 219} 220 221/// getCategoryNameFromID - Given a category ID, return the name of the 222/// category, an empty string if CategoryID is zero, or null if CategoryID is 223/// invalid. 224StringRef DiagnosticIDs::getCategoryNameFromID(unsigned CategoryID) { 225 if (CategoryID >= getNumberOfCategories()) 226 return StringRef(); 227 return CategoryNameTable[CategoryID].getName(); 228} 229 230 231 232DiagnosticIDs::SFINAEResponse 233DiagnosticIDs::getDiagnosticSFINAEResponse(unsigned DiagID) { 234 if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID)) 235 return static_cast<DiagnosticIDs::SFINAEResponse>(Info->SFINAE); 236 return SFINAE_Report; 237} 238 239/// getBuiltinDiagClass - Return the class field of the diagnostic. 240/// 241static unsigned getBuiltinDiagClass(unsigned DiagID) { 242 if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID)) 243 return Info->Class; 244 return ~0U; 245} 246 247//===----------------------------------------------------------------------===// 248// Custom Diagnostic information 249//===----------------------------------------------------------------------===// 250 251namespace clang { 252 namespace diag { 253 class CustomDiagInfo { 254 typedef std::pair<DiagnosticIDs::Level, std::string> DiagDesc; 255 std::vector<DiagDesc> DiagInfo; 256 std::map<DiagDesc, unsigned> DiagIDs; 257 public: 258 259 /// getDescription - Return the description of the specified custom 260 /// diagnostic. 261 StringRef getDescription(unsigned DiagID) const { 262 assert(this && DiagID-DIAG_UPPER_LIMIT < DiagInfo.size() && 263 "Invalid diagnostic ID"); 264 return DiagInfo[DiagID-DIAG_UPPER_LIMIT].second; 265 } 266 267 /// getLevel - Return the level of the specified custom diagnostic. 268 DiagnosticIDs::Level getLevel(unsigned DiagID) const { 269 assert(this && DiagID-DIAG_UPPER_LIMIT < DiagInfo.size() && 270 "Invalid diagnostic ID"); 271 return DiagInfo[DiagID-DIAG_UPPER_LIMIT].first; 272 } 273 274 unsigned getOrCreateDiagID(DiagnosticIDs::Level L, StringRef Message, 275 DiagnosticIDs &Diags) { 276 DiagDesc D(L, Message); 277 // Check to see if it already exists. 278 std::map<DiagDesc, unsigned>::iterator I = DiagIDs.lower_bound(D); 279 if (I != DiagIDs.end() && I->first == D) 280 return I->second; 281 282 // If not, assign a new ID. 283 unsigned ID = DiagInfo.size()+DIAG_UPPER_LIMIT; 284 DiagIDs.insert(std::make_pair(D, ID)); 285 DiagInfo.push_back(D); 286 return ID; 287 } 288 }; 289 290 } // end diag namespace 291} // end clang namespace 292 293 294//===----------------------------------------------------------------------===// 295// Common Diagnostic implementation 296//===----------------------------------------------------------------------===// 297 298DiagnosticIDs::DiagnosticIDs() { CustomDiagInfo = nullptr; } 299 300DiagnosticIDs::~DiagnosticIDs() { 301 delete CustomDiagInfo; 302} 303 304/// getCustomDiagID - Return an ID for a diagnostic with the specified message 305/// and level. If this is the first request for this diagnostic, it is 306/// registered and created, otherwise the existing ID is returned. 307/// 308/// \param FormatString A fixed diagnostic format string that will be hashed and 309/// mapped to a unique DiagID. 310unsigned DiagnosticIDs::getCustomDiagID(Level L, StringRef FormatString) { 311 if (!CustomDiagInfo) 312 CustomDiagInfo = new diag::CustomDiagInfo(); 313 return CustomDiagInfo->getOrCreateDiagID(L, FormatString, *this); 314} 315 316 317/// isBuiltinWarningOrExtension - Return true if the unmapped diagnostic 318/// level of the specified diagnostic ID is a Warning or Extension. 319/// This only works on builtin diagnostics, not custom ones, and is not legal to 320/// call on NOTEs. 321bool DiagnosticIDs::isBuiltinWarningOrExtension(unsigned DiagID) { 322 return DiagID < diag::DIAG_UPPER_LIMIT && 323 getBuiltinDiagClass(DiagID) != CLASS_ERROR; 324} 325 326/// \brief Determine whether the given built-in diagnostic ID is a 327/// Note. 328bool DiagnosticIDs::isBuiltinNote(unsigned DiagID) { 329 return DiagID < diag::DIAG_UPPER_LIMIT && 330 getBuiltinDiagClass(DiagID) == CLASS_NOTE; 331} 332 333/// isBuiltinExtensionDiag - Determine whether the given built-in diagnostic 334/// ID is for an extension of some sort. This also returns EnabledByDefault, 335/// which is set to indicate whether the diagnostic is ignored by default (in 336/// which case -pedantic enables it) or treated as a warning/error by default. 337/// 338bool DiagnosticIDs::isBuiltinExtensionDiag(unsigned DiagID, 339 bool &EnabledByDefault) { 340 if (DiagID >= diag::DIAG_UPPER_LIMIT || 341 getBuiltinDiagClass(DiagID) != CLASS_EXTENSION) 342 return false; 343 344 EnabledByDefault = 345 GetDefaultDiagMapping(DiagID).getSeverity() != diag::Severity::Ignored; 346 return true; 347} 348 349bool DiagnosticIDs::isDefaultMappingAsError(unsigned DiagID) { 350 if (DiagID >= diag::DIAG_UPPER_LIMIT) 351 return false; 352 353 return GetDefaultDiagMapping(DiagID).getSeverity() == diag::Severity::Error; 354} 355 356/// getDescription - Given a diagnostic ID, return a description of the 357/// issue. 358StringRef DiagnosticIDs::getDescription(unsigned DiagID) const { 359 if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID)) 360 return Info->getDescription(); 361 return CustomDiagInfo->getDescription(DiagID); 362} 363 364static DiagnosticIDs::Level toLevel(diag::Severity SV) { 365 switch (SV) { 366 case diag::Severity::Ignored: 367 return DiagnosticIDs::Ignored; 368 case diag::Severity::Remark: 369 return DiagnosticIDs::Remark; 370 case diag::Severity::Warning: 371 return DiagnosticIDs::Warning; 372 case diag::Severity::Error: 373 return DiagnosticIDs::Error; 374 case diag::Severity::Fatal: 375 return DiagnosticIDs::Fatal; 376 } 377 llvm_unreachable("unexpected severity"); 378} 379 380/// getDiagnosticLevel - Based on the way the client configured the 381/// DiagnosticsEngine object, classify the specified diagnostic ID into a Level, 382/// by consumable the DiagnosticClient. 383DiagnosticIDs::Level 384DiagnosticIDs::getDiagnosticLevel(unsigned DiagID, SourceLocation Loc, 385 const DiagnosticsEngine &Diag) const { 386 // Handle custom diagnostics, which cannot be mapped. 387 if (DiagID >= diag::DIAG_UPPER_LIMIT) 388 return CustomDiagInfo->getLevel(DiagID); 389 390 unsigned DiagClass = getBuiltinDiagClass(DiagID); 391 if (DiagClass == CLASS_NOTE) return DiagnosticIDs::Note; 392 return toLevel(getDiagnosticSeverity(DiagID, Loc, Diag)); 393} 394 395/// \brief Based on the way the client configured the Diagnostic 396/// object, classify the specified diagnostic ID into a Level, consumable by 397/// the DiagnosticClient. 398/// 399/// \param Loc The source location we are interested in finding out the 400/// diagnostic state. Can be null in order to query the latest state. 401diag::Severity 402DiagnosticIDs::getDiagnosticSeverity(unsigned DiagID, SourceLocation Loc, 403 const DiagnosticsEngine &Diag) const { 404 assert(getBuiltinDiagClass(DiagID) != CLASS_NOTE); 405 406 // Specific non-error diagnostics may be mapped to various levels from ignored 407 // to error. Errors can only be mapped to fatal. 408 diag::Severity Result = diag::Severity::Fatal; 409 410 DiagnosticsEngine::DiagStatePointsTy::iterator 411 Pos = Diag.GetDiagStatePointForLoc(Loc); 412 DiagnosticsEngine::DiagState *State = Pos->State; 413 414 // Get the mapping information, or compute it lazily. 415 DiagnosticMapping &Mapping = State->getOrAddMapping((diag::kind)DiagID); 416 417 // TODO: Can a null severity really get here? 418 if (Mapping.getSeverity() != diag::Severity()) 419 Result = Mapping.getSeverity(); 420 421 // Upgrade ignored diagnostics if -Weverything is enabled. 422 if (Diag.EnableAllWarnings && Result == diag::Severity::Ignored && 423 !Mapping.isUser()) 424 Result = diag::Severity::Warning; 425 426 // Diagnostics of class REMARK are either printed as remarks or in case they 427 // have been added to -Werror they are printed as errors. 428 // FIXME: Disregarding user-requested remark mappings like this is bogus. 429 if (Result == diag::Severity::Warning && 430 getBuiltinDiagClass(DiagID) == CLASS_REMARK) 431 Result = diag::Severity::Remark; 432 433 // Ignore -pedantic diagnostics inside __extension__ blocks. 434 // (The diagnostics controlled by -pedantic are the extension diagnostics 435 // that are not enabled by default.) 436 bool EnabledByDefault = false; 437 bool IsExtensionDiag = isBuiltinExtensionDiag(DiagID, EnabledByDefault); 438 if (Diag.AllExtensionsSilenced && IsExtensionDiag && !EnabledByDefault) 439 return diag::Severity::Ignored; 440 441 // For extension diagnostics that haven't been explicitly mapped, check if we 442 // should upgrade the diagnostic. 443 if (IsExtensionDiag && !Mapping.isUser()) 444 Result = std::max(Result, Diag.ExtBehavior); 445 446 // At this point, ignored errors can no longer be upgraded. 447 if (Result == diag::Severity::Ignored) 448 return Result; 449 450 // Honor -w, which is lower in priority than pedantic-errors, but higher than 451 // -Werror. 452 if (Result == diag::Severity::Warning && Diag.IgnoreAllWarnings) 453 return diag::Severity::Ignored; 454 455 // If -Werror is enabled, map warnings to errors unless explicitly disabled. 456 if (Result == diag::Severity::Warning) { 457 if (Diag.WarningsAsErrors && !Mapping.hasNoWarningAsError()) 458 Result = diag::Severity::Error; 459 } 460 461 // If -Wfatal-errors is enabled, map errors to fatal unless explicity 462 // disabled. 463 if (Result == diag::Severity::Error) { 464 if (Diag.ErrorsAsFatal && !Mapping.hasNoErrorAsFatal()) 465 Result = diag::Severity::Fatal; 466 } 467 468 // Custom diagnostics always are emitted in system headers. 469 bool ShowInSystemHeader = 470 !GetDiagInfo(DiagID) || GetDiagInfo(DiagID)->WarnShowInSystemHeader; 471 472 // If we are in a system header, we ignore it. We look at the diagnostic class 473 // because we also want to ignore extensions and warnings in -Werror and 474 // -pedantic-errors modes, which *map* warnings/extensions to errors. 475 if (Diag.SuppressSystemWarnings && !ShowInSystemHeader && Loc.isValid() && 476 Diag.getSourceManager().isInSystemHeader( 477 Diag.getSourceManager().getExpansionLoc(Loc))) 478 return diag::Severity::Ignored; 479 480 return Result; 481} 482 483#define GET_DIAG_ARRAYS 484#include "clang/Basic/DiagnosticGroups.inc" 485#undef GET_DIAG_ARRAYS 486 487namespace { 488 struct WarningOption { 489 uint16_t NameOffset; 490 uint16_t Members; 491 uint16_t SubGroups; 492 493 // String is stored with a pascal-style length byte. 494 StringRef getName() const { 495 return StringRef(DiagGroupNames + NameOffset + 1, 496 DiagGroupNames[NameOffset]); 497 } 498 }; 499} 500 501// Second the table of options, sorted by name for fast binary lookup. 502static const WarningOption OptionTable[] = { 503#define GET_DIAG_TABLE 504#include "clang/Basic/DiagnosticGroups.inc" 505#undef GET_DIAG_TABLE 506}; 507static const size_t OptionTableSize = llvm::array_lengthof(OptionTable); 508 509static bool WarningOptionCompare(const WarningOption &LHS, StringRef RHS) { 510 return LHS.getName() < RHS; 511} 512 513/// getWarningOptionForDiag - Return the lowest-level warning option that 514/// enables the specified diagnostic. If there is no -Wfoo flag that controls 515/// the diagnostic, this returns null. 516StringRef DiagnosticIDs::getWarningOptionForDiag(unsigned DiagID) { 517 if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID)) 518 return OptionTable[Info->getOptionGroupIndex()].getName(); 519 return StringRef(); 520} 521 522static void getDiagnosticsInGroup(const WarningOption *Group, 523 SmallVectorImpl<diag::kind> &Diags) { 524 // Add the members of the option diagnostic set. 525 const int16_t *Member = DiagArrays + Group->Members; 526 for (; *Member != -1; ++Member) 527 Diags.push_back(*Member); 528 529 // Add the members of the subgroups. 530 const int16_t *SubGroups = DiagSubGroups + Group->SubGroups; 531 for (; *SubGroups != (int16_t)-1; ++SubGroups) 532 getDiagnosticsInGroup(&OptionTable[(short)*SubGroups], Diags); 533} 534 535bool DiagnosticIDs::getDiagnosticsInGroup( 536 StringRef Group, 537 SmallVectorImpl<diag::kind> &Diags) const { 538 const WarningOption *Found = 539 std::lower_bound(OptionTable, OptionTable + OptionTableSize, Group, 540 WarningOptionCompare); 541 if (Found == OptionTable + OptionTableSize || 542 Found->getName() != Group) 543 return true; // Option not found. 544 545 ::getDiagnosticsInGroup(Found, Diags); 546 return false; 547} 548 549void DiagnosticIDs::getAllDiagnostics( 550 SmallVectorImpl<diag::kind> &Diags) const { 551 for (unsigned i = 0; i != StaticDiagInfoSize; ++i) 552 Diags.push_back(StaticDiagInfo[i].DiagID); 553} 554 555StringRef DiagnosticIDs::getNearestWarningOption(StringRef Group) { 556 StringRef Best; 557 unsigned BestDistance = Group.size() + 1; // Sanity threshold. 558 for (const WarningOption *i = OptionTable, *e = OptionTable + OptionTableSize; 559 i != e; ++i) { 560 // Don't suggest ignored warning flags. 561 if (!i->Members && !i->SubGroups) 562 continue; 563 564 unsigned Distance = i->getName().edit_distance(Group, true, BestDistance); 565 if (Distance == BestDistance) { 566 // Two matches with the same distance, don't prefer one over the other. 567 Best = ""; 568 } else if (Distance < BestDistance) { 569 // This is a better match. 570 Best = i->getName(); 571 BestDistance = Distance; 572 } 573 } 574 575 return Best; 576} 577 578/// ProcessDiag - This is the method used to report a diagnostic that is 579/// finally fully formed. 580bool DiagnosticIDs::ProcessDiag(DiagnosticsEngine &Diag) const { 581 Diagnostic Info(&Diag); 582 583 if (Diag.SuppressAllDiagnostics) 584 return false; 585 586 assert(Diag.getClient() && "DiagnosticClient not set!"); 587 588 // Figure out the diagnostic level of this message. 589 unsigned DiagID = Info.getID(); 590 DiagnosticIDs::Level DiagLevel 591 = getDiagnosticLevel(DiagID, Info.getLocation(), Diag); 592 593 if (DiagLevel != DiagnosticIDs::Note) { 594 // Record that a fatal error occurred only when we see a second 595 // non-note diagnostic. This allows notes to be attached to the 596 // fatal error, but suppresses any diagnostics that follow those 597 // notes. 598 if (Diag.LastDiagLevel == DiagnosticIDs::Fatal) 599 Diag.FatalErrorOccurred = true; 600 601 Diag.LastDiagLevel = DiagLevel; 602 } 603 604 // Update counts for DiagnosticErrorTrap even if a fatal error occurred. 605 if (DiagLevel >= DiagnosticIDs::Error) { 606 ++Diag.TrapNumErrorsOccurred; 607 if (isUnrecoverable(DiagID)) 608 ++Diag.TrapNumUnrecoverableErrorsOccurred; 609 } 610 611 // If a fatal error has already been emitted, silence all subsequent 612 // diagnostics. 613 if (Diag.FatalErrorOccurred) { 614 if (DiagLevel >= DiagnosticIDs::Error && 615 Diag.Client->IncludeInDiagnosticCounts()) { 616 ++Diag.NumErrors; 617 ++Diag.NumErrorsSuppressed; 618 } 619 620 return false; 621 } 622 623 // If the client doesn't care about this message, don't issue it. If this is 624 // a note and the last real diagnostic was ignored, ignore it too. 625 if (DiagLevel == DiagnosticIDs::Ignored || 626 (DiagLevel == DiagnosticIDs::Note && 627 Diag.LastDiagLevel == DiagnosticIDs::Ignored)) 628 return false; 629 630 if (DiagLevel >= DiagnosticIDs::Error) { 631 if (isUnrecoverable(DiagID)) 632 Diag.UnrecoverableErrorOccurred = true; 633 634 // Warnings which have been upgraded to errors do not prevent compilation. 635 if (isDefaultMappingAsError(DiagID)) 636 Diag.UncompilableErrorOccurred = true; 637 638 Diag.ErrorOccurred = true; 639 if (Diag.Client->IncludeInDiagnosticCounts()) { 640 ++Diag.NumErrors; 641 } 642 643 // If we've emitted a lot of errors, emit a fatal error instead of it to 644 // stop a flood of bogus errors. 645 if (Diag.ErrorLimit && Diag.NumErrors > Diag.ErrorLimit && 646 DiagLevel == DiagnosticIDs::Error) { 647 Diag.SetDelayedDiagnostic(diag::fatal_too_many_errors); 648 return false; 649 } 650 } 651 652 // Finally, report it. 653 EmitDiag(Diag, DiagLevel); 654 return true; 655} 656 657void DiagnosticIDs::EmitDiag(DiagnosticsEngine &Diag, Level DiagLevel) const { 658 Diagnostic Info(&Diag); 659 assert(DiagLevel != DiagnosticIDs::Ignored && "Cannot emit ignored diagnostics!"); 660 661 Diag.Client->HandleDiagnostic((DiagnosticsEngine::Level)DiagLevel, Info); 662 if (Diag.Client->IncludeInDiagnosticCounts()) { 663 if (DiagLevel == DiagnosticIDs::Warning) 664 ++Diag.NumWarnings; 665 } 666 667 Diag.CurDiagID = ~0U; 668} 669 670bool DiagnosticIDs::isUnrecoverable(unsigned DiagID) const { 671 if (DiagID >= diag::DIAG_UPPER_LIMIT) { 672 // Custom diagnostics. 673 return CustomDiagInfo->getLevel(DiagID) >= DiagnosticIDs::Error; 674 } 675 676 // Only errors may be unrecoverable. 677 if (getBuiltinDiagClass(DiagID) < CLASS_ERROR) 678 return false; 679 680 if (DiagID == diag::err_unavailable || 681 DiagID == diag::err_unavailable_message) 682 return false; 683 684 // Currently we consider all ARC errors as recoverable. 685 if (isARCDiagnostic(DiagID)) 686 return false; 687 688 return true; 689} 690 691bool DiagnosticIDs::isARCDiagnostic(unsigned DiagID) { 692 unsigned cat = getCategoryNumberForDiag(DiagID); 693 return DiagnosticIDs::getCategoryNameFromID(cat).startswith("ARC "); 694} 695