1 //===--- Diagnostic.cpp - C Language Family Diagnostic Handling -----------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the Diagnostic-related interfaces.
12 //===----------------------------------------------------------------------===//
14 #include "clang/AST/ASTDiagnostic.h"
15 #include "clang/Analysis/AnalysisDiagnostic.h"
16 #include "clang/Basic/Diagnostic.h"
17 #include "clang/Basic/FileManager.h"
18 #include "clang/Basic/IdentifierTable.h"
19 #include "clang/Basic/PartialDiagnostic.h"
20 #include "clang/Basic/SourceLocation.h"
21 #include "clang/Basic/SourceManager.h"
22 #include "clang/Driver/DriverDiagnostic.h"
23 #include "clang/Frontend/FrontendDiagnostic.h"
24 #include "clang/Lex/LexDiagnostic.h"
25 #include "clang/Parse/ParseDiagnostic.h"
26 #include "clang/Sema/SemaDiagnostic.h"
27 #include "llvm/ADT/SmallVector.h"
28 #include "llvm/ADT/StringExtras.h"
29 #include "llvm/Support/MemoryBuffer.h"
30 #include "llvm/Support/raw_ostream.h"
35 using namespace clang;
37 //===----------------------------------------------------------------------===//
38 // Builtin Diagnostic information
39 //===----------------------------------------------------------------------===//
41 // Diagnostic classes.
45 CLASS_EXTENSION = 0x03,
49 struct StaticDiagInfoRec {
50 unsigned short DiagID;
54 unsigned Category : 5;
56 const char *Description;
57 const char *OptionGroup;
59 bool operator<(const StaticDiagInfoRec &RHS) const {
60 return DiagID < RHS.DiagID;
62 bool operator>(const StaticDiagInfoRec &RHS) const {
63 return DiagID > RHS.DiagID;
67 static const StaticDiagInfoRec StaticDiagInfo[] = {
68 #define DIAG(ENUM,CLASS,DEFAULT_MAPPING,DESC,GROUP,SFINAE, CATEGORY) \
69 { diag::ENUM, DEFAULT_MAPPING, CLASS, SFINAE, CATEGORY, DESC, GROUP },
70 #include "clang/Basic/DiagnosticCommonKinds.inc"
71 #include "clang/Basic/DiagnosticDriverKinds.inc"
72 #include "clang/Basic/DiagnosticFrontendKinds.inc"
73 #include "clang/Basic/DiagnosticLexKinds.inc"
74 #include "clang/Basic/DiagnosticParseKinds.inc"
75 #include "clang/Basic/DiagnosticASTKinds.inc"
76 #include "clang/Basic/DiagnosticSemaKinds.inc"
77 #include "clang/Basic/DiagnosticAnalysisKinds.inc"
78 { 0, 0, 0, 0, 0, 0, 0}
82 /// GetDiagInfo - Return the StaticDiagInfoRec entry for the specified DiagID,
83 /// or null if the ID is invalid.
84 static const StaticDiagInfoRec *GetDiagInfo(unsigned DiagID) {
85 unsigned NumDiagEntries = sizeof(StaticDiagInfo)/sizeof(StaticDiagInfo[0])-1;
87 // If assertions are enabled, verify that the StaticDiagInfo array is sorted.
89 static bool IsFirst = true;
91 for (unsigned i = 1; i != NumDiagEntries; ++i) {
92 assert(StaticDiagInfo[i-1].DiagID != StaticDiagInfo[i].DiagID &&
93 "Diag ID conflict, the enums at the start of clang::diag (in "
94 "Diagnostic.h) probably need to be increased");
96 assert(StaticDiagInfo[i-1] < StaticDiagInfo[i] &&
97 "Improperly sorted diag info");
103 // Search the diagnostic table with a binary search.
104 StaticDiagInfoRec Find = { DiagID, 0, 0, 0, 0, 0, 0 };
106 const StaticDiagInfoRec *Found =
107 std::lower_bound(StaticDiagInfo, StaticDiagInfo + NumDiagEntries, Find);
108 if (Found == StaticDiagInfo + NumDiagEntries ||
109 Found->DiagID != DiagID)
115 static unsigned GetDefaultDiagMapping(unsigned DiagID) {
116 if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
117 return Info->Mapping;
118 return diag::MAP_FATAL;
121 /// getWarningOptionForDiag - Return the lowest-level warning option that
122 /// enables the specified diagnostic. If there is no -Wfoo flag that controls
123 /// the diagnostic, this returns null.
124 const char *Diagnostic::getWarningOptionForDiag(unsigned DiagID) {
125 if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
126 return Info->OptionGroup;
130 /// getWarningOptionForDiag - Return the category number that a specified
131 /// DiagID belongs to, or 0 if no category.
132 unsigned Diagnostic::getCategoryNumberForDiag(unsigned DiagID) {
133 if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
134 return Info->Category;
138 /// getCategoryNameFromID - Given a category ID, return the name of the
139 /// category, an empty string if CategoryID is zero, or null if CategoryID is
141 const char *Diagnostic::getCategoryNameFromID(unsigned CategoryID) {
142 // Second the table of options, sorted by name for fast binary lookup.
143 static const char *CategoryNameTable[] = {
144 #define GET_CATEGORY_TABLE
145 #define CATEGORY(X) X,
146 #include "clang/Basic/DiagnosticGroups.inc"
147 #undef GET_CATEGORY_TABLE
150 static const size_t CategoryNameTableSize =
151 sizeof(CategoryNameTable) / sizeof(CategoryNameTable[0])-1;
153 if (CategoryID >= CategoryNameTableSize) return 0;
154 return CategoryNameTable[CategoryID];
159 Diagnostic::SFINAEResponse
160 Diagnostic::getDiagnosticSFINAEResponse(unsigned DiagID) {
161 if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID)) {
163 return SFINAE_Report;
165 if (Info->Class == CLASS_ERROR)
166 return SFINAE_SubstitutionFailure;
168 // Suppress notes, warnings, and extensions;
169 return SFINAE_Suppress;
172 return SFINAE_Report;
175 /// getDiagClass - Return the class field of the diagnostic.
177 static unsigned getBuiltinDiagClass(unsigned DiagID) {
178 if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
183 //===----------------------------------------------------------------------===//
184 // Custom Diagnostic information
185 //===----------------------------------------------------------------------===//
189 class CustomDiagInfo {
190 typedef std::pair<Diagnostic::Level, std::string> DiagDesc;
191 std::vector<DiagDesc> DiagInfo;
192 std::map<DiagDesc, unsigned> DiagIDs;
195 /// getDescription - Return the description of the specified custom
197 const char *getDescription(unsigned DiagID) const {
198 assert(this && DiagID-DIAG_UPPER_LIMIT < DiagInfo.size() &&
199 "Invalid diagnosic ID");
200 return DiagInfo[DiagID-DIAG_UPPER_LIMIT].second.c_str();
203 /// getLevel - Return the level of the specified custom diagnostic.
204 Diagnostic::Level getLevel(unsigned DiagID) const {
205 assert(this && DiagID-DIAG_UPPER_LIMIT < DiagInfo.size() &&
206 "Invalid diagnosic ID");
207 return DiagInfo[DiagID-DIAG_UPPER_LIMIT].first;
210 unsigned getOrCreateDiagID(Diagnostic::Level L, llvm::StringRef Message,
212 DiagDesc D(L, Message);
213 // Check to see if it already exists.
214 std::map<DiagDesc, unsigned>::iterator I = DiagIDs.lower_bound(D);
215 if (I != DiagIDs.end() && I->first == D)
218 // If not, assign a new ID.
219 unsigned ID = DiagInfo.size()+DIAG_UPPER_LIMIT;
220 DiagIDs.insert(std::make_pair(D, ID));
221 DiagInfo.push_back(D);
226 } // end diag namespace
227 } // end clang namespace
230 //===----------------------------------------------------------------------===//
231 // Common Diagnostic implementation
232 //===----------------------------------------------------------------------===//
234 static void DummyArgToStringFn(Diagnostic::ArgumentKind AK, intptr_t QT,
235 const char *Modifier, unsigned ML,
236 const char *Argument, unsigned ArgLen,
237 const Diagnostic::ArgumentValue *PrevArgs,
238 unsigned NumPrevArgs,
239 llvm::SmallVectorImpl<char> &Output,
241 const char *Str = "<can't format argument>";
242 Output.append(Str, Str+strlen(Str));
246 Diagnostic::Diagnostic(DiagnosticClient *client) : Client(client) {
247 AllExtensionsSilenced = 0;
248 IgnoreAllWarnings = false;
249 WarningsAsErrors = false;
250 ErrorsAsFatal = false;
251 SuppressSystemWarnings = false;
252 SuppressAllDiagnostics = false;
253 ShowOverloads = Ovl_All;
254 ExtBehavior = Ext_Ignore;
256 ErrorOccurred = false;
257 FatalErrorOccurred = false;
259 TemplateBacktraceLimit = 0;
263 NumErrorsSuppressed = 0;
266 LastDiagLevel = Ignored;
268 ArgToStringFn = DummyArgToStringFn;
269 ArgToStringCookie = 0;
273 // Set all mappings to 'unset'.
274 DiagMappings BlankDiags(diag::DIAG_UPPER_LIMIT/2, 0);
275 DiagMappingsStack.push_back(BlankDiags);
278 Diagnostic::~Diagnostic() {
279 delete CustomDiagInfo;
283 void Diagnostic::pushMappings() {
284 // Avoids undefined behavior when the stack has to resize.
285 DiagMappingsStack.reserve(DiagMappingsStack.size() + 1);
286 DiagMappingsStack.push_back(DiagMappingsStack.back());
289 bool Diagnostic::popMappings() {
290 if (DiagMappingsStack.size() == 1)
293 DiagMappingsStack.pop_back();
297 /// getCustomDiagID - Return an ID for a diagnostic with the specified message
298 /// and level. If this is the first request for this diagnosic, it is
299 /// registered and created, otherwise the existing ID is returned.
300 unsigned Diagnostic::getCustomDiagID(Level L, llvm::StringRef Message) {
301 if (CustomDiagInfo == 0)
302 CustomDiagInfo = new diag::CustomDiagInfo();
303 return CustomDiagInfo->getOrCreateDiagID(L, Message, *this);
307 /// isBuiltinWarningOrExtension - Return true if the unmapped diagnostic
308 /// level of the specified diagnostic ID is a Warning or Extension.
309 /// This only works on builtin diagnostics, not custom ones, and is not legal to
311 bool Diagnostic::isBuiltinWarningOrExtension(unsigned DiagID) {
312 return DiagID < diag::DIAG_UPPER_LIMIT &&
313 getBuiltinDiagClass(DiagID) != CLASS_ERROR;
316 /// \brief Determine whether the given built-in diagnostic ID is a
318 bool Diagnostic::isBuiltinNote(unsigned DiagID) {
319 return DiagID < diag::DIAG_UPPER_LIMIT &&
320 getBuiltinDiagClass(DiagID) == CLASS_NOTE;
323 /// isBuiltinExtensionDiag - Determine whether the given built-in diagnostic
324 /// ID is for an extension of some sort. This also returns EnabledByDefault,
325 /// which is set to indicate whether the diagnostic is ignored by default (in
326 /// which case -pedantic enables it) or treated as a warning/error by default.
328 bool Diagnostic::isBuiltinExtensionDiag(unsigned DiagID,
329 bool &EnabledByDefault) {
330 if (DiagID >= diag::DIAG_UPPER_LIMIT ||
331 getBuiltinDiagClass(DiagID) != CLASS_EXTENSION)
334 EnabledByDefault = StaticDiagInfo[DiagID].Mapping != diag::MAP_IGNORE;
339 /// getDescription - Given a diagnostic ID, return a description of the
341 const char *Diagnostic::getDescription(unsigned DiagID) const {
342 if (const StaticDiagInfoRec *Info = GetDiagInfo(DiagID))
343 return Info->Description;
344 return CustomDiagInfo->getDescription(DiagID);
347 void Diagnostic::SetDelayedDiagnostic(unsigned DiagID, llvm::StringRef Arg1,
348 llvm::StringRef Arg2) {
352 DelayedDiagID = DiagID;
353 DelayedDiagArg1 = Arg1.str();
354 DelayedDiagArg2 = Arg2.str();
357 void Diagnostic::ReportDelayed() {
358 Report(DelayedDiagID) << DelayedDiagArg1 << DelayedDiagArg2;
360 DelayedDiagArg1.clear();
361 DelayedDiagArg2.clear();
364 /// getDiagnosticLevel - Based on the way the client configured the Diagnostic
365 /// object, classify the specified diagnostic ID into a Level, consumable by
366 /// the DiagnosticClient.
367 Diagnostic::Level Diagnostic::getDiagnosticLevel(unsigned DiagID) const {
368 // Handle custom diagnostics, which cannot be mapped.
369 if (DiagID >= diag::DIAG_UPPER_LIMIT)
370 return CustomDiagInfo->getLevel(DiagID);
372 unsigned DiagClass = getBuiltinDiagClass(DiagID);
373 assert(DiagClass != CLASS_NOTE && "Cannot get diagnostic level of a note!");
374 return getDiagnosticLevel(DiagID, DiagClass);
377 /// getDiagnosticLevel - Based on the way the client configured the Diagnostic
378 /// object, classify the specified diagnostic ID into a Level, consumable by
379 /// the DiagnosticClient.
381 Diagnostic::getDiagnosticLevel(unsigned DiagID, unsigned DiagClass) const {
382 // Specific non-error diagnostics may be mapped to various levels from ignored
383 // to error. Errors can only be mapped to fatal.
384 Diagnostic::Level Result = Diagnostic::Fatal;
386 // Get the mapping information, if unset, compute it lazily.
387 unsigned MappingInfo = getDiagnosticMappingInfo((diag::kind)DiagID);
388 if (MappingInfo == 0) {
389 MappingInfo = GetDefaultDiagMapping(DiagID);
390 setDiagnosticMappingInternal(DiagID, MappingInfo, false);
393 switch (MappingInfo & 7) {
394 default: assert(0 && "Unknown mapping!");
395 case diag::MAP_IGNORE:
396 // Ignore this, unless this is an extension diagnostic and we're mapping
397 // them onto warnings or errors.
398 if (!isBuiltinExtensionDiag(DiagID) || // Not an extension
399 ExtBehavior == Ext_Ignore || // Extensions ignored anyway
400 (MappingInfo & 8) != 0) // User explicitly mapped it.
401 return Diagnostic::Ignored;
402 Result = Diagnostic::Warning;
403 if (ExtBehavior == Ext_Error) Result = Diagnostic::Error;
404 if (Result == Diagnostic::Error && ErrorsAsFatal)
405 Result = Diagnostic::Fatal;
407 case diag::MAP_ERROR:
408 Result = Diagnostic::Error;
410 Result = Diagnostic::Fatal;
412 case diag::MAP_FATAL:
413 Result = Diagnostic::Fatal;
415 case diag::MAP_WARNING:
416 // If warnings are globally mapped to ignore or error, do it.
417 if (IgnoreAllWarnings)
418 return Diagnostic::Ignored;
420 Result = Diagnostic::Warning;
422 // If this is an extension diagnostic and we're in -pedantic-error mode, and
423 // if the user didn't explicitly map it, upgrade to an error.
424 if (ExtBehavior == Ext_Error &&
425 (MappingInfo & 8) == 0 &&
426 isBuiltinExtensionDiag(DiagID))
427 Result = Diagnostic::Error;
429 if (WarningsAsErrors)
430 Result = Diagnostic::Error;
431 if (Result == Diagnostic::Error && ErrorsAsFatal)
432 Result = Diagnostic::Fatal;
435 case diag::MAP_WARNING_NO_WERROR:
436 // Diagnostics specified with -Wno-error=foo should be set to warnings, but
437 // not be adjusted by -Werror or -pedantic-errors.
438 Result = Diagnostic::Warning;
440 // If warnings are globally mapped to ignore or error, do it.
441 if (IgnoreAllWarnings)
442 return Diagnostic::Ignored;
446 case diag::MAP_ERROR_NO_WFATAL:
447 // Diagnostics specified as -Wno-fatal-error=foo should be errors, but
448 // unaffected by -Wfatal-errors.
449 Result = Diagnostic::Error;
453 // Okay, we're about to return this as a "diagnostic to emit" one last check:
454 // if this is any sort of extension warning, and if we're in an __extension__
455 // block, silence it.
456 if (AllExtensionsSilenced && isBuiltinExtensionDiag(DiagID))
457 return Diagnostic::Ignored;
462 struct WarningOption {
464 const short *Members;
465 const short *SubGroups;
468 #define GET_DIAG_ARRAYS
469 #include "clang/Basic/DiagnosticGroups.inc"
470 #undef GET_DIAG_ARRAYS
472 // Second the table of options, sorted by name for fast binary lookup.
473 static const WarningOption OptionTable[] = {
474 #define GET_DIAG_TABLE
475 #include "clang/Basic/DiagnosticGroups.inc"
476 #undef GET_DIAG_TABLE
478 static const size_t OptionTableSize =
479 sizeof(OptionTable) / sizeof(OptionTable[0]);
481 static bool WarningOptionCompare(const WarningOption &LHS,
482 const WarningOption &RHS) {
483 return strcmp(LHS.Name, RHS.Name) < 0;
486 static void MapGroupMembers(const WarningOption *Group, diag::Mapping Mapping,
488 // Option exists, poke all the members of its diagnostic set.
489 if (const short *Member = Group->Members) {
490 for (; *Member != -1; ++Member)
491 Diags.setDiagnosticMapping(*Member, Mapping);
494 // Enable/disable all subgroups along with this one.
495 if (const short *SubGroups = Group->SubGroups) {
496 for (; *SubGroups != (short)-1; ++SubGroups)
497 MapGroupMembers(&OptionTable[(short)*SubGroups], Mapping, Diags);
501 /// setDiagnosticGroupMapping - Change an entire diagnostic group (e.g.
502 /// "unknown-pragmas" to have the specified mapping. This returns true and
503 /// ignores the request if "Group" was unknown, false otherwise.
504 bool Diagnostic::setDiagnosticGroupMapping(const char *Group,
507 WarningOption Key = { Group, 0, 0 };
508 const WarningOption *Found =
509 std::lower_bound(OptionTable, OptionTable + OptionTableSize, Key,
510 WarningOptionCompare);
511 if (Found == OptionTable + OptionTableSize ||
512 strcmp(Found->Name, Group) != 0)
513 return true; // Option not found.
515 MapGroupMembers(Found, Map, *this);
520 /// ProcessDiag - This is the method used to report a diagnostic that is
521 /// finally fully formed.
522 bool Diagnostic::ProcessDiag() {
523 DiagnosticInfo Info(this);
525 if (SuppressAllDiagnostics)
528 // Figure out the diagnostic level of this message.
529 Diagnostic::Level DiagLevel;
530 unsigned DiagID = Info.getID();
532 // ShouldEmitInSystemHeader - True if this diagnostic should be produced even
533 // in a system header.
534 bool ShouldEmitInSystemHeader;
536 if (DiagID >= diag::DIAG_UPPER_LIMIT) {
537 // Handle custom diagnostics, which cannot be mapped.
538 DiagLevel = CustomDiagInfo->getLevel(DiagID);
540 // Custom diagnostics always are emitted in system headers.
541 ShouldEmitInSystemHeader = true;
543 // Get the class of the diagnostic. If this is a NOTE, map it onto whatever
544 // the diagnostic level was for the previous diagnostic so that it is
545 // filtered the same as the previous diagnostic.
546 unsigned DiagClass = getBuiltinDiagClass(DiagID);
547 if (DiagClass == CLASS_NOTE) {
548 DiagLevel = Diagnostic::Note;
549 ShouldEmitInSystemHeader = false; // extra consideration is needed
551 // If this is not an error and we are in a system header, we ignore it.
552 // Check the original Diag ID here, because we also want to ignore
553 // extensions and warnings in -Werror and -pedantic-errors modes, which
554 // *map* warnings/extensions to errors.
555 ShouldEmitInSystemHeader = DiagClass == CLASS_ERROR;
557 DiagLevel = getDiagnosticLevel(DiagID, DiagClass);
561 if (DiagLevel != Diagnostic::Note) {
562 // Record that a fatal error occurred only when we see a second
563 // non-note diagnostic. This allows notes to be attached to the
564 // fatal error, but suppresses any diagnostics that follow those
566 if (LastDiagLevel == Diagnostic::Fatal)
567 FatalErrorOccurred = true;
569 LastDiagLevel = DiagLevel;
572 // If a fatal error has already been emitted, silence all subsequent
574 if (FatalErrorOccurred) {
575 if (DiagLevel >= Diagnostic::Error) {
577 ++NumErrorsSuppressed;
583 // If the client doesn't care about this message, don't issue it. If this is
584 // a note and the last real diagnostic was ignored, ignore it too.
585 if (DiagLevel == Diagnostic::Ignored ||
586 (DiagLevel == Diagnostic::Note && LastDiagLevel == Diagnostic::Ignored))
589 // If this diagnostic is in a system header and is not a clang error, suppress
591 if (SuppressSystemWarnings && !ShouldEmitInSystemHeader &&
592 Info.getLocation().isValid() &&
593 Info.getLocation().getInstantiationLoc().isInSystemHeader() &&
594 (DiagLevel != Diagnostic::Note || LastDiagLevel == Diagnostic::Ignored)) {
595 LastDiagLevel = Diagnostic::Ignored;
599 if (DiagLevel >= Diagnostic::Error) {
600 ErrorOccurred = true;
603 // If we've emitted a lot of errors, emit a fatal error after it to stop a
604 // flood of bogus errors.
605 if (ErrorLimit && NumErrors >= ErrorLimit &&
606 DiagLevel == Diagnostic::Error)
607 SetDelayedDiagnostic(diag::fatal_too_many_errors);
610 // Finally, report it.
611 Client->HandleDiagnostic(DiagLevel, Info);
612 if (Client->IncludeInDiagnosticCounts()) {
613 if (DiagLevel == Diagnostic::Warning)
622 bool DiagnosticBuilder::Emit() {
623 // If DiagObj is null, then its soul was stolen by the copy ctor
624 // or the user called Emit().
625 if (DiagObj == 0) return false;
627 // When emitting diagnostics, we set the final argument count into
628 // the Diagnostic object.
629 DiagObj->NumDiagArgs = NumArgs;
630 DiagObj->NumDiagRanges = NumRanges;
631 DiagObj->NumFixItHints = NumFixItHints;
633 // Process the diagnostic, sending the accumulated information to the
635 bool Emitted = DiagObj->ProcessDiag();
637 // Clear out the current diagnostic object.
638 unsigned DiagID = DiagObj->CurDiagID;
641 // If there was a delayed diagnostic, emit it now.
642 if (DiagObj->DelayedDiagID && DiagObj->DelayedDiagID != DiagID)
643 DiagObj->ReportDelayed();
645 // This diagnostic is dead.
652 DiagnosticClient::~DiagnosticClient() {}
655 /// ModifierIs - Return true if the specified modifier matches specified string.
656 template <std::size_t StrLen>
657 static bool ModifierIs(const char *Modifier, unsigned ModifierLen,
658 const char (&Str)[StrLen]) {
659 return StrLen-1 == ModifierLen && !memcmp(Modifier, Str, StrLen-1);
662 /// ScanForward - Scans forward, looking for the given character, skipping
663 /// nested clauses and escaped characters.
664 static const char *ScanFormat(const char *I, const char *E, char Target) {
667 for ( ; I != E; ++I) {
668 if (Depth == 0 && *I == Target) return I;
669 if (Depth != 0 && *I == '}') Depth--;
675 // Escaped characters get implicitly skipped here.
678 if (!isdigit(*I) && !ispunct(*I)) {
679 for (I++; I != E && !isdigit(*I) && *I != '{'; I++) ;
689 /// HandleSelectModifier - Handle the integer 'select' modifier. This is used
690 /// like this: %select{foo|bar|baz}2. This means that the integer argument
691 /// "%2" has a value from 0-2. If the value is 0, the diagnostic prints 'foo'.
692 /// If the value is 1, it prints 'bar'. If it has the value 2, it prints 'baz'.
693 /// This is very useful for certain classes of variant diagnostics.
694 static void HandleSelectModifier(const DiagnosticInfo &DInfo, unsigned ValNo,
695 const char *Argument, unsigned ArgumentLen,
696 llvm::SmallVectorImpl<char> &OutStr) {
697 const char *ArgumentEnd = Argument+ArgumentLen;
699 // Skip over 'ValNo' |'s.
701 const char *NextVal = ScanFormat(Argument, ArgumentEnd, '|');
702 assert(NextVal != ArgumentEnd && "Value for integer select modifier was"
703 " larger than the number of options in the diagnostic string!");
704 Argument = NextVal+1; // Skip this string.
708 // Get the end of the value. This is either the } or the |.
709 const char *EndPtr = ScanFormat(Argument, ArgumentEnd, '|');
711 // Recursively format the result of the select clause into the output string.
712 DInfo.FormatDiagnostic(Argument, EndPtr, OutStr);
715 /// HandleIntegerSModifier - Handle the integer 's' modifier. This adds the
716 /// letter 's' to the string if the value is not 1. This is used in cases like
717 /// this: "you idiot, you have %4 parameter%s4!".
718 static void HandleIntegerSModifier(unsigned ValNo,
719 llvm::SmallVectorImpl<char> &OutStr) {
721 OutStr.push_back('s');
724 /// HandleOrdinalModifier - Handle the integer 'ord' modifier. This
725 /// prints the ordinal form of the given integer, with 1 corresponding
726 /// to the first ordinal. Currently this is hard-coded to use the
728 static void HandleOrdinalModifier(unsigned ValNo,
729 llvm::SmallVectorImpl<char> &OutStr) {
730 assert(ValNo != 0 && "ValNo must be strictly positive!");
732 llvm::raw_svector_ostream Out(OutStr);
734 // We could use text forms for the first N ordinals, but the numeric
735 // forms are actually nicer in diagnostics because they stand out.
738 // It is critically important that we do this perfectly for
739 // user-written sequences with over 100 elements.
740 switch (ValNo % 100) {
746 switch (ValNo % 10) {
747 case 1: Out << "st"; return;
748 case 2: Out << "nd"; return;
749 case 3: Out << "rd"; return;
750 default: Out << "th"; return;
756 /// PluralNumber - Parse an unsigned integer and advance Start.
757 static unsigned PluralNumber(const char *&Start, const char *End) {
758 // Programming 101: Parse a decimal number :-)
760 while (Start != End && *Start >= '0' && *Start <= '9') {
768 /// TestPluralRange - Test if Val is in the parsed range. Modifies Start.
769 static bool TestPluralRange(unsigned Val, const char *&Start, const char *End) {
771 unsigned Ref = PluralNumber(Start, End);
776 unsigned Low = PluralNumber(Start, End);
777 assert(*Start == ',' && "Bad plural expression syntax: expected ,");
779 unsigned High = PluralNumber(Start, End);
780 assert(*Start == ']' && "Bad plural expression syntax: expected )");
782 return Low <= Val && Val <= High;
785 /// EvalPluralExpr - Actual expression evaluator for HandlePluralModifier.
786 static bool EvalPluralExpr(unsigned ValNo, const char *Start, const char *End) {
796 unsigned Arg = PluralNumber(Start, End);
797 assert(*Start == '=' && "Bad plural expression syntax: expected =");
799 unsigned ValMod = ValNo % Arg;
800 if (TestPluralRange(ValMod, Start, End))
803 assert((C == '[' || (C >= '0' && C <= '9')) &&
804 "Bad plural expression syntax: unexpected character");
806 if (TestPluralRange(ValNo, Start, End))
810 // Scan for next or-expr part.
811 Start = std::find(Start, End, ',');
819 /// HandlePluralModifier - Handle the integer 'plural' modifier. This is used
820 /// for complex plural forms, or in languages where all plurals are complex.
821 /// The syntax is: %plural{cond1:form1|cond2:form2|:form3}, where condn are
822 /// conditions that are tested in order, the form corresponding to the first
823 /// that applies being emitted. The empty condition is always true, making the
824 /// last form a default case.
825 /// Conditions are simple boolean expressions, where n is the number argument.
826 /// Here are the rules.
827 /// condition := expression | empty
828 /// empty := -> always true
829 /// expression := numeric [',' expression] -> logical or
830 /// numeric := range -> true if n in range
831 /// | '%' number '=' range -> true if n % number in range
833 /// | '[' number ',' number ']' -> ranges are inclusive both ends
835 /// Here are some examples from the GNU gettext manual written in this form:
839 /// {0:form2|%100=11,%10=0,%10=[2,9]:form1|:form0}
841 /// {1:form0|2:form1|:form2}
843 /// {1:form0|0,%100=[1,19]:form1|:form2}
845 /// {%10=0,%100=[10,19]:form2|%10=1:form0|:form1}
846 /// Russian (requires repeated form):
847 /// {%100=[11,14]:form2|%10=1:form0|%10=[2,4]:form1|:form2}
849 /// {1:form0|[2,4]:form1|:form2}
850 /// Polish (requires repeated form):
851 /// {1:form0|%100=[10,20]:form2|%10=[2,4]:form1|:form2}
852 static void HandlePluralModifier(unsigned ValNo,
853 const char *Argument, unsigned ArgumentLen,
854 llvm::SmallVectorImpl<char> &OutStr) {
855 const char *ArgumentEnd = Argument + ArgumentLen;
857 assert(Argument < ArgumentEnd && "Plural expression didn't match.");
858 const char *ExprEnd = Argument;
859 while (*ExprEnd != ':') {
860 assert(ExprEnd != ArgumentEnd && "Plural missing expression end");
863 if (EvalPluralExpr(ValNo, Argument, ExprEnd)) {
864 Argument = ExprEnd + 1;
865 ExprEnd = ScanFormat(Argument, ArgumentEnd, '|');
866 OutStr.append(Argument, ExprEnd);
869 Argument = ScanFormat(Argument, ArgumentEnd - 1, '|') + 1;
874 /// FormatDiagnostic - Format this diagnostic into a string, substituting the
875 /// formal arguments into the %0 slots. The result is appended onto the Str
877 void DiagnosticInfo::
878 FormatDiagnostic(llvm::SmallVectorImpl<char> &OutStr) const {
879 const char *DiagStr = getDiags()->getDescription(getID());
880 const char *DiagEnd = DiagStr+strlen(DiagStr);
882 FormatDiagnostic(DiagStr, DiagEnd, OutStr);
885 void DiagnosticInfo::
886 FormatDiagnostic(const char *DiagStr, const char *DiagEnd,
887 llvm::SmallVectorImpl<char> &OutStr) const {
889 /// FormattedArgs - Keep track of all of the arguments formatted by
890 /// ConvertArgToString and pass them into subsequent calls to
891 /// ConvertArgToString, allowing the implementation to avoid redundancies in
893 llvm::SmallVector<Diagnostic::ArgumentValue, 8> FormattedArgs;
895 while (DiagStr != DiagEnd) {
896 if (DiagStr[0] != '%') {
897 // Append non-%0 substrings to Str if we have one.
898 const char *StrEnd = std::find(DiagStr, DiagEnd, '%');
899 OutStr.append(DiagStr, StrEnd);
902 } else if (ispunct(DiagStr[1])) {
903 OutStr.push_back(DiagStr[1]); // %% -> %.
911 // This must be a placeholder for a diagnostic argument. The format for a
912 // placeholder is one of "%0", "%modifier0", or "%modifier{arguments}0".
913 // The digit is a number from 0-9 indicating which argument this comes from.
914 // The modifier is a string of digits from the set [-a-z]+, arguments is a
915 // brace enclosed string.
916 const char *Modifier = 0, *Argument = 0;
917 unsigned ModifierLen = 0, ArgumentLen = 0;
919 // Check to see if we have a modifier. If so eat it.
920 if (!isdigit(DiagStr[0])) {
922 while (DiagStr[0] == '-' ||
923 (DiagStr[0] >= 'a' && DiagStr[0] <= 'z'))
925 ModifierLen = DiagStr-Modifier;
927 // If we have an argument, get it next.
928 if (DiagStr[0] == '{') {
929 ++DiagStr; // Skip {.
932 DiagStr = ScanFormat(DiagStr, DiagEnd, '}');
933 assert(DiagStr != DiagEnd && "Mismatched {}'s in diagnostic string!");
934 ArgumentLen = DiagStr-Argument;
935 ++DiagStr; // Skip }.
939 assert(isdigit(*DiagStr) && "Invalid format for argument in diagnostic");
940 unsigned ArgNo = *DiagStr++ - '0';
942 Diagnostic::ArgumentKind Kind = getArgKind(ArgNo);
946 case Diagnostic::ak_std_string: {
947 const std::string &S = getArgStdStr(ArgNo);
948 assert(ModifierLen == 0 && "No modifiers for strings yet");
949 OutStr.append(S.begin(), S.end());
952 case Diagnostic::ak_c_string: {
953 const char *S = getArgCStr(ArgNo);
954 assert(ModifierLen == 0 && "No modifiers for strings yet");
956 // Don't crash if get passed a null pointer by accident.
960 OutStr.append(S, S + strlen(S));
963 // ---- INTEGERS ----
964 case Diagnostic::ak_sint: {
965 int Val = getArgSInt(ArgNo);
967 if (ModifierIs(Modifier, ModifierLen, "select")) {
968 HandleSelectModifier(*this, (unsigned)Val, Argument, ArgumentLen, OutStr);
969 } else if (ModifierIs(Modifier, ModifierLen, "s")) {
970 HandleIntegerSModifier(Val, OutStr);
971 } else if (ModifierIs(Modifier, ModifierLen, "plural")) {
972 HandlePluralModifier((unsigned)Val, Argument, ArgumentLen, OutStr);
973 } else if (ModifierIs(Modifier, ModifierLen, "ordinal")) {
974 HandleOrdinalModifier((unsigned)Val, OutStr);
976 assert(ModifierLen == 0 && "Unknown integer modifier");
977 llvm::raw_svector_ostream(OutStr) << Val;
981 case Diagnostic::ak_uint: {
982 unsigned Val = getArgUInt(ArgNo);
984 if (ModifierIs(Modifier, ModifierLen, "select")) {
985 HandleSelectModifier(*this, Val, Argument, ArgumentLen, OutStr);
986 } else if (ModifierIs(Modifier, ModifierLen, "s")) {
987 HandleIntegerSModifier(Val, OutStr);
988 } else if (ModifierIs(Modifier, ModifierLen, "plural")) {
989 HandlePluralModifier((unsigned)Val, Argument, ArgumentLen, OutStr);
990 } else if (ModifierIs(Modifier, ModifierLen, "ordinal")) {
991 HandleOrdinalModifier(Val, OutStr);
993 assert(ModifierLen == 0 && "Unknown integer modifier");
994 llvm::raw_svector_ostream(OutStr) << Val;
998 // ---- NAMES and TYPES ----
999 case Diagnostic::ak_identifierinfo: {
1000 const IdentifierInfo *II = getArgIdentifier(ArgNo);
1001 assert(ModifierLen == 0 && "No modifiers for strings yet");
1003 // Don't crash if get passed a null pointer by accident.
1005 const char *S = "(null)";
1006 OutStr.append(S, S + strlen(S));
1010 llvm::raw_svector_ostream(OutStr) << '\'' << II->getName() << '\'';
1013 case Diagnostic::ak_qualtype:
1014 case Diagnostic::ak_declarationname:
1015 case Diagnostic::ak_nameddecl:
1016 case Diagnostic::ak_nestednamespec:
1017 case Diagnostic::ak_declcontext:
1018 getDiags()->ConvertArgToString(Kind, getRawArg(ArgNo),
1019 Modifier, ModifierLen,
1020 Argument, ArgumentLen,
1021 FormattedArgs.data(), FormattedArgs.size(),
1026 // Remember this argument info for subsequent formatting operations. Turn
1027 // std::strings into a null terminated string to make it be the same case as
1028 // all the other ones.
1029 if (Kind != Diagnostic::ak_std_string)
1030 FormattedArgs.push_back(std::make_pair(Kind, getRawArg(ArgNo)));
1032 FormattedArgs.push_back(std::make_pair(Diagnostic::ak_c_string,
1033 (intptr_t)getArgStdStr(ArgNo).c_str()));
1038 StoredDiagnostic::StoredDiagnostic() { }
1040 StoredDiagnostic::StoredDiagnostic(Diagnostic::Level Level,
1041 llvm::StringRef Message)
1042 : Level(Level), Loc(), Message(Message) { }
1044 StoredDiagnostic::StoredDiagnostic(Diagnostic::Level Level,
1045 const DiagnosticInfo &Info)
1046 : Level(Level), Loc(Info.getLocation()) {
1047 llvm::SmallString<64> Message;
1048 Info.FormatDiagnostic(Message);
1049 this->Message.assign(Message.begin(), Message.end());
1051 Ranges.reserve(Info.getNumRanges());
1052 for (unsigned I = 0, N = Info.getNumRanges(); I != N; ++I)
1053 Ranges.push_back(Info.getRange(I));
1055 FixIts.reserve(Info.getNumFixItHints());
1056 for (unsigned I = 0, N = Info.getNumFixItHints(); I != N; ++I)
1057 FixIts.push_back(Info.getFixItHint(I));
1060 StoredDiagnostic::~StoredDiagnostic() { }
1062 static void WriteUnsigned(llvm::raw_ostream &OS, unsigned Value) {
1063 OS.write((const char *)&Value, sizeof(unsigned));
1066 static void WriteString(llvm::raw_ostream &OS, llvm::StringRef String) {
1067 WriteUnsigned(OS, String.size());
1068 OS.write(String.data(), String.size());
1071 static void WriteSourceLocation(llvm::raw_ostream &OS,
1073 SourceLocation Location) {
1074 if (!SM || Location.isInvalid()) {
1075 // If we don't have a source manager or this location is invalid,
1076 // just write an invalid location.
1077 WriteUnsigned(OS, 0);
1078 WriteUnsigned(OS, 0);
1079 WriteUnsigned(OS, 0);
1083 Location = SM->getInstantiationLoc(Location);
1084 std::pair<FileID, unsigned> Decomposed = SM->getDecomposedLoc(Location);
1086 const FileEntry *FE = SM->getFileEntryForID(Decomposed.first);
1088 WriteString(OS, FE->getName());
1090 // Fallback to using the buffer name when there is no entry.
1091 WriteString(OS, SM->getBuffer(Decomposed.first)->getBufferIdentifier());
1094 WriteUnsigned(OS, SM->getLineNumber(Decomposed.first, Decomposed.second));
1095 WriteUnsigned(OS, SM->getColumnNumber(Decomposed.first, Decomposed.second));
1098 void StoredDiagnostic::Serialize(llvm::raw_ostream &OS) const {
1099 SourceManager *SM = 0;
1100 if (getLocation().isValid())
1101 SM = &const_cast<SourceManager &>(getLocation().getManager());
1103 // Write a short header to help identify diagnostics.
1104 OS << (char)0x06 << (char)0x07;
1106 // Write the diagnostic level and location.
1107 WriteUnsigned(OS, (unsigned)Level);
1108 WriteSourceLocation(OS, SM, getLocation());
1110 // Write the diagnostic message.
1111 llvm::SmallString<64> Message;
1112 WriteString(OS, getMessage());
1114 // Count the number of ranges that don't point into macros, since
1115 // only simple file ranges serialize well.
1116 unsigned NumNonMacroRanges = 0;
1117 for (range_iterator R = range_begin(), REnd = range_end(); R != REnd; ++R) {
1118 if (R->getBegin().isMacroID() || R->getEnd().isMacroID())
1121 ++NumNonMacroRanges;
1124 // Write the ranges.
1125 WriteUnsigned(OS, NumNonMacroRanges);
1126 if (NumNonMacroRanges) {
1127 for (range_iterator R = range_begin(), REnd = range_end(); R != REnd; ++R) {
1128 if (R->getBegin().isMacroID() || R->getEnd().isMacroID())
1131 WriteSourceLocation(OS, SM, R->getBegin());
1132 WriteSourceLocation(OS, SM, R->getEnd());
1133 WriteUnsigned(OS, R->isTokenRange());
1137 // Determine if all of the fix-its involve rewrites with simple file
1138 // locations (not in macro instantiations). If so, we can write
1139 // fix-it information.
1140 unsigned NumFixIts = 0;
1141 for (fixit_iterator F = fixit_begin(), FEnd = fixit_end(); F != FEnd; ++F) {
1142 if (F->RemoveRange.isValid() &&
1143 (F->RemoveRange.getBegin().isMacroID() ||
1144 F->RemoveRange.getEnd().isMacroID())) {
1149 if (F->InsertionLoc.isValid() && F->InsertionLoc.isMacroID()) {
1157 // Write the fix-its.
1158 WriteUnsigned(OS, NumFixIts);
1159 for (fixit_iterator F = fixit_begin(), FEnd = fixit_end(); F != FEnd; ++F) {
1160 WriteSourceLocation(OS, SM, F->RemoveRange.getBegin());
1161 WriteSourceLocation(OS, SM, F->RemoveRange.getEnd());
1162 WriteUnsigned(OS, F->RemoveRange.isTokenRange());
1163 WriteSourceLocation(OS, SM, F->InsertionLoc);
1164 WriteString(OS, F->CodeToInsert);
1168 static bool ReadUnsigned(const char *&Memory, const char *MemoryEnd,
1170 if (Memory + sizeof(unsigned) > MemoryEnd)
1173 memmove(&Value, Memory, sizeof(unsigned));
1174 Memory += sizeof(unsigned);
1178 static bool ReadSourceLocation(FileManager &FM, SourceManager &SM,
1179 const char *&Memory, const char *MemoryEnd,
1180 SourceLocation &Location) {
1181 // Read the filename.
1182 unsigned FileNameLen = 0;
1183 if (ReadUnsigned(Memory, MemoryEnd, FileNameLen) ||
1184 Memory + FileNameLen > MemoryEnd)
1187 llvm::StringRef FileName(Memory, FileNameLen);
1188 Memory += FileNameLen;
1190 // Read the line, column.
1191 unsigned Line = 0, Column = 0;
1192 if (ReadUnsigned(Memory, MemoryEnd, Line) ||
1193 ReadUnsigned(Memory, MemoryEnd, Column))
1196 if (FileName.empty()) {
1197 Location = SourceLocation();
1201 const FileEntry *File = FM.getFile(FileName);
1205 // Make sure that this file has an entry in the source manager.
1206 if (!SM.hasFileInfo(File))
1207 SM.createFileID(File, SourceLocation(), SrcMgr::C_User);
1209 Location = SM.getLocation(File, Line, Column);
1214 StoredDiagnostic::Deserialize(FileManager &FM, SourceManager &SM,
1215 const char *&Memory, const char *MemoryEnd) {
1217 if (Memory == MemoryEnd)
1218 return StoredDiagnostic();
1220 if (*Memory != 0x06) {
1226 if (Memory == MemoryEnd)
1227 return StoredDiagnostic();
1229 if (*Memory != 0x07) {
1234 // We found the header. We're done.
1239 // Read the severity level.
1241 if (ReadUnsigned(Memory, MemoryEnd, Level) || Level > Diagnostic::Fatal)
1242 return StoredDiagnostic();
1244 // Read the source location.
1245 SourceLocation Location;
1246 if (ReadSourceLocation(FM, SM, Memory, MemoryEnd, Location))
1247 return StoredDiagnostic();
1249 // Read the diagnostic text.
1250 if (Memory == MemoryEnd)
1251 return StoredDiagnostic();
1253 unsigned MessageLen = 0;
1254 if (ReadUnsigned(Memory, MemoryEnd, MessageLen) ||
1255 Memory + MessageLen > MemoryEnd)
1256 return StoredDiagnostic();
1258 llvm::StringRef Message(Memory, MessageLen);
1259 Memory += MessageLen;
1262 // At this point, we have enough information to form a diagnostic. Do so.
1263 StoredDiagnostic Diag;
1264 Diag.Level = (Diagnostic::Level)Level;
1265 Diag.Loc = FullSourceLoc(Location, SM);
1266 Diag.Message = Message;
1267 if (Memory == MemoryEnd)
1270 // Read the source ranges.
1271 unsigned NumSourceRanges = 0;
1272 if (ReadUnsigned(Memory, MemoryEnd, NumSourceRanges))
1274 for (unsigned I = 0; I != NumSourceRanges; ++I) {
1275 SourceLocation Begin, End;
1276 unsigned IsTokenRange;
1277 if (ReadSourceLocation(FM, SM, Memory, MemoryEnd, Begin) ||
1278 ReadSourceLocation(FM, SM, Memory, MemoryEnd, End) ||
1279 ReadUnsigned(Memory, MemoryEnd, IsTokenRange))
1282 Diag.Ranges.push_back(CharSourceRange(SourceRange(Begin, End),
1286 // Read the fix-it hints.
1287 unsigned NumFixIts = 0;
1288 if (ReadUnsigned(Memory, MemoryEnd, NumFixIts))
1290 for (unsigned I = 0; I != NumFixIts; ++I) {
1291 SourceLocation RemoveBegin, RemoveEnd, InsertionLoc;
1292 unsigned InsertLen = 0, RemoveIsTokenRange;
1293 if (ReadSourceLocation(FM, SM, Memory, MemoryEnd, RemoveBegin) ||
1294 ReadSourceLocation(FM, SM, Memory, MemoryEnd, RemoveEnd) ||
1295 ReadUnsigned(Memory, MemoryEnd, RemoveIsTokenRange) ||
1296 ReadSourceLocation(FM, SM, Memory, MemoryEnd, InsertionLoc) ||
1297 ReadUnsigned(Memory, MemoryEnd, InsertLen) ||
1298 Memory + InsertLen > MemoryEnd) {
1299 Diag.FixIts.clear();
1304 Hint.RemoveRange = CharSourceRange(SourceRange(RemoveBegin, RemoveEnd),
1305 RemoveIsTokenRange);
1306 Hint.InsertionLoc = InsertionLoc;
1307 Hint.CodeToInsert.assign(Memory, Memory + InsertLen);
1308 Memory += InsertLen;
1309 Diag.FixIts.push_back(Hint);
1315 /// IncludeInDiagnosticCounts - This method (whose default implementation
1316 /// returns true) indicates whether the diagnostics handled by this
1317 /// DiagnosticClient should be included in the number of diagnostics
1318 /// reported by Diagnostic.
1319 bool DiagnosticClient::IncludeInDiagnosticCounts() const { return true; }
1321 PartialDiagnostic::StorageAllocator::StorageAllocator() {
1322 for (unsigned I = 0; I != NumCached; ++I)
1323 FreeList[I] = Cached + I;
1324 NumFreeListEntries = NumCached;
1327 PartialDiagnostic::StorageAllocator::~StorageAllocator() {
1328 assert(NumFreeListEntries == NumCached && "A partial is on the lamb");