1 //===--- MicrosoftMangle.cpp - Microsoft Visual C++ Name Mangling ---------===//
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 provides C++ name mangling targeting the Microsoft Visual C++ ABI.
12 //===----------------------------------------------------------------------===//
14 #include "clang/AST/Mangle.h"
15 #include "clang/AST/ASTContext.h"
16 #include "clang/AST/Attr.h"
17 #include "clang/AST/CXXInheritance.h"
18 #include "clang/AST/CharUnits.h"
19 #include "clang/AST/Decl.h"
20 #include "clang/AST/DeclCXX.h"
21 #include "clang/AST/DeclObjC.h"
22 #include "clang/AST/DeclOpenMP.h"
23 #include "clang/AST/DeclTemplate.h"
24 #include "clang/AST/Expr.h"
25 #include "clang/AST/ExprCXX.h"
26 #include "clang/AST/VTableBuilder.h"
27 #include "clang/Basic/ABI.h"
28 #include "clang/Basic/DiagnosticOptions.h"
29 #include "clang/Basic/TargetInfo.h"
30 #include "llvm/ADT/StringExtras.h"
31 #include "llvm/Support/JamCRC.h"
32 #include "llvm/Support/MD5.h"
33 #include "llvm/Support/MathExtras.h"
35 using namespace clang;
39 struct msvc_hashing_ostream : public llvm::raw_svector_ostream {
41 llvm::SmallString<64> Buffer;
43 msvc_hashing_ostream(raw_ostream &OS)
44 : llvm::raw_svector_ostream(Buffer), OS(OS) {}
45 ~msvc_hashing_ostream() override {
46 StringRef MangledName = str();
47 bool StartsWithEscape = MangledName.startswith("\01");
49 MangledName = MangledName.drop_front(1);
50 if (MangledName.size() <= 4096) {
56 llvm::MD5::MD5Result Hash;
57 Hasher.update(MangledName);
60 SmallString<32> HexString;
61 llvm::MD5::stringifyResult(Hash, HexString);
65 OS << "??@" << HexString << '@';
69 static const DeclContext *
70 getLambdaDefaultArgumentDeclContext(const Decl *D) {
71 if (const auto *RD = dyn_cast<CXXRecordDecl>(D))
73 if (const auto *Parm =
74 dyn_cast_or_null<ParmVarDecl>(RD->getLambdaContextDecl()))
75 return Parm->getDeclContext();
79 /// Retrieve the declaration context that should be used when mangling
80 /// the given declaration.
81 static const DeclContext *getEffectiveDeclContext(const Decl *D) {
82 // The ABI assumes that lambda closure types that occur within
83 // default arguments live in the context of the function. However, due to
84 // the way in which Clang parses and creates function declarations, this is
85 // not the case: the lambda closure type ends up living in the context
86 // where the function itself resides, because the function declaration itself
87 // had not yet been created. Fix the context here.
88 if (const auto *LDADC = getLambdaDefaultArgumentDeclContext(D))
91 // Perform the same check for block literals.
92 if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
93 if (ParmVarDecl *ContextParam =
94 dyn_cast_or_null<ParmVarDecl>(BD->getBlockManglingContextDecl()))
95 return ContextParam->getDeclContext();
98 const DeclContext *DC = D->getDeclContext();
99 if (isa<CapturedDecl>(DC) || isa<OMPDeclareReductionDecl>(DC)) {
100 return getEffectiveDeclContext(cast<Decl>(DC));
103 return DC->getRedeclContext();
106 static const DeclContext *getEffectiveParentContext(const DeclContext *DC) {
107 return getEffectiveDeclContext(cast<Decl>(DC));
110 static const FunctionDecl *getStructor(const NamedDecl *ND) {
111 if (const auto *FTD = dyn_cast<FunctionTemplateDecl>(ND))
112 return FTD->getTemplatedDecl()->getCanonicalDecl();
114 const auto *FD = cast<FunctionDecl>(ND);
115 if (const auto *FTD = FD->getPrimaryTemplate())
116 return FTD->getTemplatedDecl()->getCanonicalDecl();
118 return FD->getCanonicalDecl();
121 /// MicrosoftMangleContextImpl - Overrides the default MangleContext for the
122 /// Microsoft Visual C++ ABI.
123 class MicrosoftMangleContextImpl : public MicrosoftMangleContext {
124 typedef std::pair<const DeclContext *, IdentifierInfo *> DiscriminatorKeyTy;
125 llvm::DenseMap<DiscriminatorKeyTy, unsigned> Discriminator;
126 llvm::DenseMap<const NamedDecl *, unsigned> Uniquifier;
127 llvm::DenseMap<const CXXRecordDecl *, unsigned> LambdaIds;
128 llvm::DenseMap<const NamedDecl *, unsigned> SEHFilterIds;
129 llvm::DenseMap<const NamedDecl *, unsigned> SEHFinallyIds;
132 MicrosoftMangleContextImpl(ASTContext &Context, DiagnosticsEngine &Diags)
133 : MicrosoftMangleContext(Context, Diags) {}
134 bool shouldMangleCXXName(const NamedDecl *D) override;
135 bool shouldMangleStringLiteral(const StringLiteral *SL) override;
136 void mangleCXXName(const NamedDecl *D, raw_ostream &Out) override;
137 void mangleVirtualMemPtrThunk(const CXXMethodDecl *MD,
138 const MethodVFTableLocation &ML,
139 raw_ostream &Out) override;
140 void mangleThunk(const CXXMethodDecl *MD, const ThunkInfo &Thunk,
141 raw_ostream &) override;
142 void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type,
143 const ThisAdjustment &ThisAdjustment,
144 raw_ostream &) override;
145 void mangleCXXVFTable(const CXXRecordDecl *Derived,
146 ArrayRef<const CXXRecordDecl *> BasePath,
147 raw_ostream &Out) override;
148 void mangleCXXVBTable(const CXXRecordDecl *Derived,
149 ArrayRef<const CXXRecordDecl *> BasePath,
150 raw_ostream &Out) override;
151 void mangleCXXVirtualDisplacementMap(const CXXRecordDecl *SrcRD,
152 const CXXRecordDecl *DstRD,
153 raw_ostream &Out) override;
154 void mangleCXXThrowInfo(QualType T, bool IsConst, bool IsVolatile,
155 bool IsUnaligned, uint32_t NumEntries,
156 raw_ostream &Out) override;
157 void mangleCXXCatchableTypeArray(QualType T, uint32_t NumEntries,
158 raw_ostream &Out) override;
159 void mangleCXXCatchableType(QualType T, const CXXConstructorDecl *CD,
160 CXXCtorType CT, uint32_t Size, uint32_t NVOffset,
161 int32_t VBPtrOffset, uint32_t VBIndex,
162 raw_ostream &Out) override;
163 void mangleCXXRTTI(QualType T, raw_ostream &Out) override;
164 void mangleCXXRTTIName(QualType T, raw_ostream &Out) override;
165 void mangleCXXRTTIBaseClassDescriptor(const CXXRecordDecl *Derived,
166 uint32_t NVOffset, int32_t VBPtrOffset,
167 uint32_t VBTableOffset, uint32_t Flags,
168 raw_ostream &Out) override;
169 void mangleCXXRTTIBaseClassArray(const CXXRecordDecl *Derived,
170 raw_ostream &Out) override;
171 void mangleCXXRTTIClassHierarchyDescriptor(const CXXRecordDecl *Derived,
172 raw_ostream &Out) override;
174 mangleCXXRTTICompleteObjectLocator(const CXXRecordDecl *Derived,
175 ArrayRef<const CXXRecordDecl *> BasePath,
176 raw_ostream &Out) override;
177 void mangleTypeName(QualType T, raw_ostream &) override;
178 void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type,
179 raw_ostream &) override;
180 void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type,
181 raw_ostream &) override;
182 void mangleReferenceTemporary(const VarDecl *, unsigned ManglingNumber,
183 raw_ostream &) override;
184 void mangleStaticGuardVariable(const VarDecl *D, raw_ostream &Out) override;
185 void mangleThreadSafeStaticGuardVariable(const VarDecl *D, unsigned GuardNum,
186 raw_ostream &Out) override;
187 void mangleDynamicInitializer(const VarDecl *D, raw_ostream &Out) override;
188 void mangleDynamicAtExitDestructor(const VarDecl *D,
189 raw_ostream &Out) override;
190 void mangleSEHFilterExpression(const NamedDecl *EnclosingDecl,
191 raw_ostream &Out) override;
192 void mangleSEHFinallyBlock(const NamedDecl *EnclosingDecl,
193 raw_ostream &Out) override;
194 void mangleStringLiteral(const StringLiteral *SL, raw_ostream &Out) override;
195 bool getNextDiscriminator(const NamedDecl *ND, unsigned &disc) {
196 const DeclContext *DC = getEffectiveDeclContext(ND);
197 if (!DC->isFunctionOrMethod())
200 // Lambda closure types are already numbered, give out a phony number so
201 // that they demangle nicely.
202 if (const auto *RD = dyn_cast<CXXRecordDecl>(ND)) {
203 if (RD->isLambda()) {
209 // Use the canonical number for externally visible decls.
210 if (ND->isExternallyVisible()) {
211 disc = getASTContext().getManglingNumber(ND);
215 // Anonymous tags are already numbered.
216 if (const TagDecl *Tag = dyn_cast<TagDecl>(ND)) {
217 if (!Tag->hasNameForLinkage() &&
218 !getASTContext().getDeclaratorForUnnamedTagDecl(Tag) &&
219 !getASTContext().getTypedefNameForUnnamedTagDecl(Tag))
223 // Make up a reasonable number for internal decls.
224 unsigned &discriminator = Uniquifier[ND];
226 discriminator = ++Discriminator[std::make_pair(DC, ND->getIdentifier())];
227 disc = discriminator + 1;
231 unsigned getLambdaId(const CXXRecordDecl *RD) {
232 assert(RD->isLambda() && "RD must be a lambda!");
233 assert(!RD->isExternallyVisible() && "RD must not be visible!");
234 assert(RD->getLambdaManglingNumber() == 0 &&
235 "RD must not have a mangling number!");
236 std::pair<llvm::DenseMap<const CXXRecordDecl *, unsigned>::iterator, bool>
237 Result = LambdaIds.insert(std::make_pair(RD, LambdaIds.size()));
238 return Result.first->second;
242 void mangleInitFiniStub(const VarDecl *D, char CharCode, raw_ostream &Out);
245 /// MicrosoftCXXNameMangler - Manage the mangling of a single name for the
246 /// Microsoft Visual C++ ABI.
247 class MicrosoftCXXNameMangler {
248 MicrosoftMangleContextImpl &Context;
251 /// The "structor" is the top-level declaration being mangled, if
252 /// that's not a template specialization; otherwise it's the pattern
253 /// for that specialization.
254 const NamedDecl *Structor;
255 unsigned StructorType;
257 typedef llvm::SmallVector<std::string, 10> BackRefVec;
258 BackRefVec NameBackReferences;
260 typedef llvm::DenseMap<const void *, unsigned> ArgBackRefMap;
261 ArgBackRefMap TypeBackReferences;
263 typedef std::set<int> PassObjectSizeArgsSet;
264 PassObjectSizeArgsSet PassObjectSizeArgs;
266 ASTContext &getASTContext() const { return Context.getASTContext(); }
268 // FIXME: If we add support for __ptr32/64 qualifiers, then we should push
269 // this check into mangleQualifiers().
270 const bool PointersAre64Bit;
273 enum QualifierMangleMode { QMM_Drop, QMM_Mangle, QMM_Escape, QMM_Result };
275 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_)
276 : Context(C), Out(Out_), Structor(nullptr), StructorType(-1),
277 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
280 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_,
281 const CXXConstructorDecl *D, CXXCtorType Type)
282 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
283 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
286 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_,
287 const CXXDestructorDecl *D, CXXDtorType Type)
288 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
289 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
292 raw_ostream &getStream() const { return Out; }
294 void mangle(const NamedDecl *D, StringRef Prefix = "?");
295 void mangleName(const NamedDecl *ND);
296 void mangleFunctionEncoding(const FunctionDecl *FD, bool ShouldMangle);
297 void mangleVariableEncoding(const VarDecl *VD);
298 void mangleMemberDataPointer(const CXXRecordDecl *RD, const ValueDecl *VD);
299 void mangleMemberFunctionPointer(const CXXRecordDecl *RD,
300 const CXXMethodDecl *MD);
301 void mangleVirtualMemPtrThunk(const CXXMethodDecl *MD,
302 const MethodVFTableLocation &ML);
303 void mangleNumber(int64_t Number);
304 void mangleTagTypeKind(TagTypeKind TK);
305 void mangleArtificalTagType(TagTypeKind TK, StringRef UnqualifiedName,
306 ArrayRef<StringRef> NestedNames = None);
307 void mangleType(QualType T, SourceRange Range,
308 QualifierMangleMode QMM = QMM_Mangle);
309 void mangleFunctionType(const FunctionType *T,
310 const FunctionDecl *D = nullptr,
311 bool ForceThisQuals = false);
312 void mangleNestedName(const NamedDecl *ND);
315 bool isStructorDecl(const NamedDecl *ND) const {
316 return ND == Structor || getStructor(ND) == Structor;
319 void mangleUnqualifiedName(const NamedDecl *ND) {
320 mangleUnqualifiedName(ND, ND->getDeclName());
322 void mangleUnqualifiedName(const NamedDecl *ND, DeclarationName Name);
323 void mangleSourceName(StringRef Name);
324 void mangleOperatorName(OverloadedOperatorKind OO, SourceLocation Loc);
325 void mangleCXXDtorType(CXXDtorType T);
326 void mangleQualifiers(Qualifiers Quals, bool IsMember);
327 void mangleRefQualifier(RefQualifierKind RefQualifier);
328 void manglePointerCVQualifiers(Qualifiers Quals);
329 void manglePointerExtQualifiers(Qualifiers Quals, QualType PointeeType);
331 void mangleUnscopedTemplateName(const TemplateDecl *ND);
333 mangleTemplateInstantiationName(const TemplateDecl *TD,
334 const TemplateArgumentList &TemplateArgs);
335 void mangleObjCMethodName(const ObjCMethodDecl *MD);
337 void mangleArgumentType(QualType T, SourceRange Range);
338 void manglePassObjectSizeArg(const PassObjectSizeAttr *POSA);
340 bool isArtificialTagType(QualType T) const;
342 // Declare manglers for every type class.
343 #define ABSTRACT_TYPE(CLASS, PARENT)
344 #define NON_CANONICAL_TYPE(CLASS, PARENT)
345 #define TYPE(CLASS, PARENT) void mangleType(const CLASS##Type *T, \
348 #include "clang/AST/TypeNodes.def"
350 #undef NON_CANONICAL_TYPE
353 void mangleType(const TagDecl *TD);
354 void mangleDecayedArrayType(const ArrayType *T);
355 void mangleArrayType(const ArrayType *T);
356 void mangleFunctionClass(const FunctionDecl *FD);
357 void mangleCallingConvention(CallingConv CC);
358 void mangleCallingConvention(const FunctionType *T);
359 void mangleIntegerLiteral(const llvm::APSInt &Number, bool IsBoolean);
360 void mangleExpression(const Expr *E);
361 void mangleThrowSpecification(const FunctionProtoType *T);
363 void mangleTemplateArgs(const TemplateDecl *TD,
364 const TemplateArgumentList &TemplateArgs);
365 void mangleTemplateArg(const TemplateDecl *TD, const TemplateArgument &TA,
366 const NamedDecl *Parm);
368 void mangleObjCProtocol(const ObjCProtocolDecl *PD);
369 void mangleObjCLifetime(const QualType T, Qualifiers Quals,
374 bool MicrosoftMangleContextImpl::shouldMangleCXXName(const NamedDecl *D) {
375 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
376 LanguageLinkage L = FD->getLanguageLinkage();
377 // Overloadable functions need mangling.
378 if (FD->hasAttr<OverloadableAttr>())
381 // The ABI expects that we would never mangle "typical" user-defined entry
382 // points regardless of visibility or freestanding-ness.
384 // N.B. This is distinct from asking about "main". "main" has a lot of
385 // special rules associated with it in the standard while these
386 // user-defined entry points are outside of the purview of the standard.
387 // For example, there can be only one definition for "main" in a standards
388 // compliant program; however nothing forbids the existence of wmain and
389 // WinMain in the same translation unit.
390 if (FD->isMSVCRTEntryPoint())
393 // C++ functions and those whose names are not a simple identifier need
395 if (!FD->getDeclName().isIdentifier() || L == CXXLanguageLinkage)
398 // C functions are not mangled.
399 if (L == CLanguageLinkage)
403 // Otherwise, no mangling is done outside C++ mode.
404 if (!getASTContext().getLangOpts().CPlusPlus)
407 const VarDecl *VD = dyn_cast<VarDecl>(D);
408 if (VD && !isa<DecompositionDecl>(D)) {
409 // C variables are not mangled.
413 // Variables at global scope with non-internal linkage are not mangled.
414 const DeclContext *DC = getEffectiveDeclContext(D);
415 // Check for extern variable declared locally.
416 if (DC->isFunctionOrMethod() && D->hasLinkage())
417 while (!DC->isNamespace() && !DC->isTranslationUnit())
418 DC = getEffectiveParentContext(DC);
420 if (DC->isTranslationUnit() && D->getFormalLinkage() == InternalLinkage &&
421 !isa<VarTemplateSpecializationDecl>(D) &&
422 D->getIdentifier() != nullptr)
430 MicrosoftMangleContextImpl::shouldMangleStringLiteral(const StringLiteral *SL) {
434 void MicrosoftCXXNameMangler::mangle(const NamedDecl *D, StringRef Prefix) {
435 // MSVC doesn't mangle C++ names the same way it mangles extern "C" names.
436 // Therefore it's really important that we don't decorate the
437 // name with leading underscores or leading/trailing at signs. So, by
438 // default, we emit an asm marker at the start so we get the name right.
439 // Callers can override this with a custom prefix.
441 // <mangled-name> ::= ? <name> <type-encoding>
444 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
445 mangleFunctionEncoding(FD, Context.shouldMangleDeclName(FD));
446 else if (const VarDecl *VD = dyn_cast<VarDecl>(D))
447 mangleVariableEncoding(VD);
448 else if (!isa<ObjCInterfaceDecl>(D))
449 llvm_unreachable("Tried to mangle unexpected NamedDecl!");
452 void MicrosoftCXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD,
454 // <type-encoding> ::= <function-class> <function-type>
456 // Since MSVC operates on the type as written and not the canonical type, it
457 // actually matters which decl we have here. MSVC appears to choose the
458 // first, since it is most likely to be the declaration in a header file.
459 FD = FD->getFirstDecl();
461 // We should never ever see a FunctionNoProtoType at this point.
462 // We don't even know how to mangle their types anyway :).
463 const FunctionProtoType *FT = FD->getType()->castAs<FunctionProtoType>();
465 // extern "C" functions can hold entities that must be mangled.
466 // As it stands, these functions still need to get expressed in the full
467 // external name. They have their class and type omitted, replaced with '9'.
469 // We would like to mangle all extern "C" functions using this additional
470 // component but this would break compatibility with MSVC's behavior.
471 // Instead, do this when we know that compatibility isn't important (in
472 // other words, when it is an overloaded extern "C" function).
473 if (FD->isExternC() && FD->hasAttr<OverloadableAttr>())
476 mangleFunctionClass(FD);
478 mangleFunctionType(FT, FD);
484 void MicrosoftCXXNameMangler::mangleVariableEncoding(const VarDecl *VD) {
485 // <type-encoding> ::= <storage-class> <variable-type>
486 // <storage-class> ::= 0 # private static member
487 // ::= 1 # protected static member
488 // ::= 2 # public static member
490 // ::= 4 # static local
492 // The first character in the encoding (after the name) is the storage class.
493 if (VD->isStaticDataMember()) {
494 // If it's a static member, it also encodes the access level.
495 switch (VD->getAccess()) {
497 case AS_private: Out << '0'; break;
498 case AS_protected: Out << '1'; break;
499 case AS_public: Out << '2'; break;
502 else if (!VD->isStaticLocal())
506 // Now mangle the type.
507 // <variable-type> ::= <type> <cvr-qualifiers>
508 // ::= <type> <pointee-cvr-qualifiers> # pointers, references
509 // Pointers and references are odd. The type of 'int * const foo;' gets
510 // mangled as 'QAHA' instead of 'PAHB', for example.
511 SourceRange SR = VD->getSourceRange();
512 QualType Ty = VD->getType();
513 if (Ty->isPointerType() || Ty->isReferenceType() ||
514 Ty->isMemberPointerType()) {
515 mangleType(Ty, SR, QMM_Drop);
516 manglePointerExtQualifiers(
517 Ty.getDesugaredType(getASTContext()).getLocalQualifiers(), QualType());
518 if (const MemberPointerType *MPT = Ty->getAs<MemberPointerType>()) {
519 mangleQualifiers(MPT->getPointeeType().getQualifiers(), true);
520 // Member pointers are suffixed with a back reference to the member
521 // pointer's class name.
522 mangleName(MPT->getClass()->getAsCXXRecordDecl());
524 mangleQualifiers(Ty->getPointeeType().getQualifiers(), false);
525 } else if (const ArrayType *AT = getASTContext().getAsArrayType(Ty)) {
526 // Global arrays are funny, too.
527 mangleDecayedArrayType(AT);
528 if (AT->getElementType()->isArrayType())
531 mangleQualifiers(Ty.getQualifiers(), false);
533 mangleType(Ty, SR, QMM_Drop);
534 mangleQualifiers(Ty.getQualifiers(), false);
538 void MicrosoftCXXNameMangler::mangleMemberDataPointer(const CXXRecordDecl *RD,
539 const ValueDecl *VD) {
540 // <member-data-pointer> ::= <integer-literal>
541 // ::= $F <number> <number>
542 // ::= $G <number> <number> <number>
545 int64_t VBTableOffset;
546 MSInheritanceAttr::Spelling IM = RD->getMSInheritanceModel();
548 FieldOffset = getASTContext().getFieldOffset(VD);
549 assert(FieldOffset % getASTContext().getCharWidth() == 0 &&
550 "cannot take address of bitfield");
551 FieldOffset /= getASTContext().getCharWidth();
555 if (IM == MSInheritanceAttr::Keyword_virtual_inheritance)
556 FieldOffset -= getASTContext().getOffsetOfBaseWithVBPtr(RD).getQuantity();
558 FieldOffset = RD->nullFieldOffsetIsZero() ? 0 : -1;
565 case MSInheritanceAttr::Keyword_single_inheritance: Code = '0'; break;
566 case MSInheritanceAttr::Keyword_multiple_inheritance: Code = '0'; break;
567 case MSInheritanceAttr::Keyword_virtual_inheritance: Code = 'F'; break;
568 case MSInheritanceAttr::Keyword_unspecified_inheritance: Code = 'G'; break;
573 mangleNumber(FieldOffset);
575 // The C++ standard doesn't allow base-to-derived member pointer conversions
576 // in template parameter contexts, so the vbptr offset of data member pointers
578 if (MSInheritanceAttr::hasVBPtrOffsetField(IM))
580 if (MSInheritanceAttr::hasVBTableOffsetField(IM))
581 mangleNumber(VBTableOffset);
585 MicrosoftCXXNameMangler::mangleMemberFunctionPointer(const CXXRecordDecl *RD,
586 const CXXMethodDecl *MD) {
587 // <member-function-pointer> ::= $1? <name>
588 // ::= $H? <name> <number>
589 // ::= $I? <name> <number> <number>
590 // ::= $J? <name> <number> <number> <number>
592 MSInheritanceAttr::Spelling IM = RD->getMSInheritanceModel();
596 case MSInheritanceAttr::Keyword_single_inheritance: Code = '1'; break;
597 case MSInheritanceAttr::Keyword_multiple_inheritance: Code = 'H'; break;
598 case MSInheritanceAttr::Keyword_virtual_inheritance: Code = 'I'; break;
599 case MSInheritanceAttr::Keyword_unspecified_inheritance: Code = 'J'; break;
602 // If non-virtual, mangle the name. If virtual, mangle as a virtual memptr
604 uint64_t NVOffset = 0;
605 uint64_t VBTableOffset = 0;
606 uint64_t VBPtrOffset = 0;
608 Out << '$' << Code << '?';
609 if (MD->isVirtual()) {
610 MicrosoftVTableContext *VTContext =
611 cast<MicrosoftVTableContext>(getASTContext().getVTableContext());
612 MethodVFTableLocation ML =
613 VTContext->getMethodVFTableLocation(GlobalDecl(MD));
614 mangleVirtualMemPtrThunk(MD, ML);
615 NVOffset = ML.VFPtrOffset.getQuantity();
616 VBTableOffset = ML.VBTableIndex * 4;
618 const ASTRecordLayout &Layout = getASTContext().getASTRecordLayout(RD);
619 VBPtrOffset = Layout.getVBPtrOffset().getQuantity();
623 mangleFunctionEncoding(MD, /*ShouldMangle=*/true);
626 if (VBTableOffset == 0 &&
627 IM == MSInheritanceAttr::Keyword_virtual_inheritance)
628 NVOffset -= getASTContext().getOffsetOfBaseWithVBPtr(RD).getQuantity();
630 // Null single inheritance member functions are encoded as a simple nullptr.
631 if (IM == MSInheritanceAttr::Keyword_single_inheritance) {
635 if (IM == MSInheritanceAttr::Keyword_unspecified_inheritance)
640 if (MSInheritanceAttr::hasNVOffsetField(/*IsMemberFunction=*/true, IM))
641 mangleNumber(static_cast<uint32_t>(NVOffset));
642 if (MSInheritanceAttr::hasVBPtrOffsetField(IM))
643 mangleNumber(VBPtrOffset);
644 if (MSInheritanceAttr::hasVBTableOffsetField(IM))
645 mangleNumber(VBTableOffset);
648 void MicrosoftCXXNameMangler::mangleVirtualMemPtrThunk(
649 const CXXMethodDecl *MD, const MethodVFTableLocation &ML) {
650 // Get the vftable offset.
651 CharUnits PointerWidth = getASTContext().toCharUnitsFromBits(
652 getASTContext().getTargetInfo().getPointerWidth(0));
653 uint64_t OffsetInVFTable = ML.Index * PointerWidth.getQuantity();
656 mangleName(MD->getParent());
658 mangleNumber(OffsetInVFTable);
660 mangleCallingConvention(MD->getType()->getAs<FunctionProtoType>());
663 void MicrosoftCXXNameMangler::mangleName(const NamedDecl *ND) {
664 // <name> ::= <unscoped-name> {[<named-scope>]+ | [<nested-name>]}? @
666 // Always start with the unqualified name.
667 mangleUnqualifiedName(ND);
669 mangleNestedName(ND);
671 // Terminate the whole name with an '@'.
675 void MicrosoftCXXNameMangler::mangleNumber(int64_t Number) {
676 // <non-negative integer> ::= A@ # when Number == 0
677 // ::= <decimal digit> # when 1 <= Number <= 10
678 // ::= <hex digit>+ @ # when Number >= 10
680 // <number> ::= [?] <non-negative integer>
682 uint64_t Value = static_cast<uint64_t>(Number);
690 else if (Value >= 1 && Value <= 10)
693 // Numbers that are not encoded as decimal digits are represented as nibbles
694 // in the range of ASCII characters 'A' to 'P'.
695 // The number 0x123450 would be encoded as 'BCDEFA'
696 char EncodedNumberBuffer[sizeof(uint64_t) * 2];
697 MutableArrayRef<char> BufferRef(EncodedNumberBuffer);
698 MutableArrayRef<char>::reverse_iterator I = BufferRef.rbegin();
699 for (; Value != 0; Value >>= 4)
700 *I++ = 'A' + (Value & 0xf);
701 Out.write(I.base(), I - BufferRef.rbegin());
706 static const TemplateDecl *
707 isTemplate(const NamedDecl *ND, const TemplateArgumentList *&TemplateArgs) {
708 // Check if we have a function template.
709 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
710 if (const TemplateDecl *TD = FD->getPrimaryTemplate()) {
711 TemplateArgs = FD->getTemplateSpecializationArgs();
716 // Check if we have a class template.
717 if (const ClassTemplateSpecializationDecl *Spec =
718 dyn_cast<ClassTemplateSpecializationDecl>(ND)) {
719 TemplateArgs = &Spec->getTemplateArgs();
720 return Spec->getSpecializedTemplate();
723 // Check if we have a variable template.
724 if (const VarTemplateSpecializationDecl *Spec =
725 dyn_cast<VarTemplateSpecializationDecl>(ND)) {
726 TemplateArgs = &Spec->getTemplateArgs();
727 return Spec->getSpecializedTemplate();
733 void MicrosoftCXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND,
734 DeclarationName Name) {
735 // <unqualified-name> ::= <operator-name>
736 // ::= <ctor-dtor-name>
738 // ::= <template-name>
740 // Check if we have a template.
741 const TemplateArgumentList *TemplateArgs = nullptr;
742 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) {
743 // Function templates aren't considered for name back referencing. This
744 // makes sense since function templates aren't likely to occur multiple
745 // times in a symbol.
746 if (isa<FunctionTemplateDecl>(TD)) {
747 mangleTemplateInstantiationName(TD, *TemplateArgs);
752 // Here comes the tricky thing: if we need to mangle something like
753 // void foo(A::X<Y>, B::X<Y>),
754 // the X<Y> part is aliased. However, if you need to mangle
755 // void foo(A::X<A::Y>, A::X<B::Y>),
756 // the A::X<> part is not aliased.
757 // That said, from the mangler's perspective we have a structure like this:
758 // namespace[s] -> type[ -> template-parameters]
759 // but from the Clang perspective we have
760 // type [ -> template-parameters]
762 // What we do is we create a new mangler, mangle the same type (without
763 // a namespace suffix) to a string using the extra mangler and then use
764 // the mangled type name as a key to check the mangling of different types
767 llvm::SmallString<64> TemplateMangling;
768 llvm::raw_svector_ostream Stream(TemplateMangling);
769 MicrosoftCXXNameMangler Extra(Context, Stream);
770 Extra.mangleTemplateInstantiationName(TD, *TemplateArgs);
772 mangleSourceName(TemplateMangling);
776 switch (Name.getNameKind()) {
777 case DeclarationName::Identifier: {
778 if (const IdentifierInfo *II = Name.getAsIdentifierInfo()) {
779 mangleSourceName(II->getName());
783 // Otherwise, an anonymous entity. We must have a declaration.
784 assert(ND && "mangling empty name without declaration");
786 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) {
787 if (NS->isAnonymousNamespace()) {
793 if (const DecompositionDecl *DD = dyn_cast<DecompositionDecl>(ND)) {
794 // FIXME: Invented mangling for decomposition declarations:
796 // where X,Y,Z are the names of the bindings.
797 llvm::SmallString<128> Name("[");
798 for (auto *BD : DD->bindings()) {
801 Name += BD->getDeclName().getAsIdentifierInfo()->getName();
804 mangleSourceName(Name);
808 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) {
809 // We must have an anonymous union or struct declaration.
810 const CXXRecordDecl *RD = VD->getType()->getAsCXXRecordDecl();
811 assert(RD && "expected variable decl to have a record type");
812 // Anonymous types with no tag or typedef get the name of their
813 // declarator mangled in. If they have no declarator, number them with
815 llvm::SmallString<64> Name("$S");
816 // Get a unique id for the anonymous struct.
817 Name += llvm::utostr(Context.getAnonymousStructId(RD) + 1);
818 mangleSourceName(Name.str());
822 // We must have an anonymous struct.
823 const TagDecl *TD = cast<TagDecl>(ND);
824 if (const TypedefNameDecl *D = TD->getTypedefNameForAnonDecl()) {
825 assert(TD->getDeclContext() == D->getDeclContext() &&
826 "Typedef should not be in another decl context!");
827 assert(D->getDeclName().getAsIdentifierInfo() &&
828 "Typedef was not named!");
829 mangleSourceName(D->getDeclName().getAsIdentifierInfo()->getName());
833 if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(TD)) {
834 if (Record->isLambda()) {
835 llvm::SmallString<10> Name("<lambda_");
837 Decl *LambdaContextDecl = Record->getLambdaContextDecl();
838 unsigned LambdaManglingNumber = Record->getLambdaManglingNumber();
840 const ParmVarDecl *Parm =
841 dyn_cast_or_null<ParmVarDecl>(LambdaContextDecl);
842 const FunctionDecl *Func =
843 Parm ? dyn_cast<FunctionDecl>(Parm->getDeclContext()) : nullptr;
846 unsigned DefaultArgNo =
847 Func->getNumParams() - Parm->getFunctionScopeIndex();
848 Name += llvm::utostr(DefaultArgNo);
852 if (LambdaManglingNumber)
853 LambdaId = LambdaManglingNumber;
855 LambdaId = Context.getLambdaId(Record);
857 Name += llvm::utostr(LambdaId);
860 mangleSourceName(Name);
862 // If the context of a closure type is an initializer for a class
863 // member (static or nonstatic), it is encoded in a qualified name.
864 if (LambdaManglingNumber && LambdaContextDecl) {
865 if ((isa<VarDecl>(LambdaContextDecl) ||
866 isa<FieldDecl>(LambdaContextDecl)) &&
867 LambdaContextDecl->getDeclContext()->isRecord()) {
868 mangleUnqualifiedName(cast<NamedDecl>(LambdaContextDecl));
875 llvm::SmallString<64> Name;
876 if (DeclaratorDecl *DD =
877 Context.getASTContext().getDeclaratorForUnnamedTagDecl(TD)) {
878 // Anonymous types without a name for linkage purposes have their
879 // declarator mangled in if they have one.
880 Name += "<unnamed-type-";
881 Name += DD->getName();
882 } else if (TypedefNameDecl *TND =
883 Context.getASTContext().getTypedefNameForUnnamedTagDecl(
885 // Anonymous types without a name for linkage purposes have their
886 // associate typedef mangled in if they have one.
887 Name += "<unnamed-type-";
888 Name += TND->getName();
889 } else if (isa<EnumDecl>(TD) &&
890 cast<EnumDecl>(TD)->enumerator_begin() !=
891 cast<EnumDecl>(TD)->enumerator_end()) {
892 // Anonymous non-empty enums mangle in the first enumerator.
893 auto *ED = cast<EnumDecl>(TD);
894 Name += "<unnamed-enum-";
895 Name += ED->enumerator_begin()->getName();
897 // Otherwise, number the types using a $S prefix.
898 Name += "<unnamed-type-$S";
899 Name += llvm::utostr(Context.getAnonymousStructId(TD) + 1);
902 mangleSourceName(Name.str());
906 case DeclarationName::ObjCZeroArgSelector:
907 case DeclarationName::ObjCOneArgSelector:
908 case DeclarationName::ObjCMultiArgSelector:
909 llvm_unreachable("Can't mangle Objective-C selector names here!");
911 case DeclarationName::CXXConstructorName:
912 if (isStructorDecl(ND)) {
913 if (StructorType == Ctor_CopyingClosure) {
917 if (StructorType == Ctor_DefaultClosure) {
925 case DeclarationName::CXXDestructorName:
926 if (isStructorDecl(ND))
927 // If the named decl is the C++ destructor we're mangling,
928 // use the type we were given.
929 mangleCXXDtorType(static_cast<CXXDtorType>(StructorType));
931 // Otherwise, use the base destructor name. This is relevant if a
932 // class with a destructor is declared within a destructor.
933 mangleCXXDtorType(Dtor_Base);
936 case DeclarationName::CXXConversionFunctionName:
937 // <operator-name> ::= ?B # (cast)
938 // The target type is encoded as the return type.
942 case DeclarationName::CXXOperatorName:
943 mangleOperatorName(Name.getCXXOverloadedOperator(), ND->getLocation());
946 case DeclarationName::CXXLiteralOperatorName: {
948 mangleSourceName(Name.getCXXLiteralIdentifier()->getName());
952 case DeclarationName::CXXDeductionGuideName:
953 llvm_unreachable("Can't mangle a deduction guide name!");
955 case DeclarationName::CXXUsingDirective:
956 llvm_unreachable("Can't mangle a using directive name!");
960 // <postfix> ::= <unqualified-name> [<postfix>]
961 // ::= <substitution> [<postfix>]
962 void MicrosoftCXXNameMangler::mangleNestedName(const NamedDecl *ND) {
963 const DeclContext *DC = getEffectiveDeclContext(ND);
964 while (!DC->isTranslationUnit()) {
965 if (isa<TagDecl>(ND) || isa<VarDecl>(ND)) {
967 if (Context.getNextDiscriminator(ND, Disc)) {
974 if (const BlockDecl *BD = dyn_cast<BlockDecl>(DC)) {
976 [](StringRef Name, const unsigned Discriminator,
977 const unsigned ParameterDiscriminator) -> std::string {
979 llvm::raw_string_ostream Stream(Buffer);
982 Stream << '_' << Discriminator;
983 if (ParameterDiscriminator)
984 Stream << '_' << ParameterDiscriminator;
988 unsigned Discriminator = BD->getBlockManglingNumber();
990 Discriminator = Context.getBlockId(BD, /*Local=*/false);
992 // Mangle the parameter position as a discriminator to deal with unnamed
993 // parameters. Rather than mangling the unqualified parameter name,
994 // always use the position to give a uniform mangling.
995 unsigned ParameterDiscriminator = 0;
996 if (const auto *MC = BD->getBlockManglingContextDecl())
997 if (const auto *P = dyn_cast<ParmVarDecl>(MC))
998 if (const auto *F = dyn_cast<FunctionDecl>(P->getDeclContext()))
999 ParameterDiscriminator =
1000 F->getNumParams() - P->getFunctionScopeIndex();
1002 DC = getEffectiveDeclContext(BD);
1005 mangleSourceName(Discriminate("_block_invoke", Discriminator,
1006 ParameterDiscriminator));
1007 // If we have a block mangling context, encode that now. This allows us
1008 // to discriminate between named static data initializers in the same
1009 // scope. This is handled differently from parameters, which use
1010 // positions to discriminate between multiple instances.
1011 if (const auto *MC = BD->getBlockManglingContextDecl())
1012 if (!isa<ParmVarDecl>(MC))
1013 if (const auto *ND = dyn_cast<NamedDecl>(MC))
1014 mangleUnqualifiedName(ND);
1015 // MS ABI and Itanium manglings are in inverted scopes. In the case of a
1016 // RecordDecl, mangle the entire scope hierarchy at this point rather than
1017 // just the unqualified name to get the ordering correct.
1018 if (const auto *RD = dyn_cast<RecordDecl>(DC))
1024 // struct __block_literal *
1027 if (PointersAre64Bit)
1030 mangleArtificalTagType(TTK_Struct,
1031 Discriminate("__block_literal", Discriminator,
1032 ParameterDiscriminator));
1035 // If the effective context was a Record, we have fully mangled the
1036 // qualified name and do not need to continue.
1037 if (isa<RecordDecl>(DC))
1040 } else if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(DC)) {
1041 mangleObjCMethodName(Method);
1042 } else if (isa<NamedDecl>(DC)) {
1043 ND = cast<NamedDecl>(DC);
1044 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
1048 mangleUnqualifiedName(ND);
1049 // Lambdas in default arguments conceptually belong to the function the
1050 // parameter corresponds to.
1051 if (const auto *LDADC = getLambdaDefaultArgumentDeclContext(ND)) {
1057 DC = DC->getParent();
1061 void MicrosoftCXXNameMangler::mangleCXXDtorType(CXXDtorType T) {
1062 // Microsoft uses the names on the case labels for these dtor variants. Clang
1063 // uses the Itanium terminology internally. Everything in this ABI delegates
1064 // towards the base dtor.
1066 // <operator-name> ::= ?1 # destructor
1067 case Dtor_Base: Out << "?1"; return;
1068 // <operator-name> ::= ?_D # vbase destructor
1069 case Dtor_Complete: Out << "?_D"; return;
1070 // <operator-name> ::= ?_G # scalar deleting destructor
1071 case Dtor_Deleting: Out << "?_G"; return;
1072 // <operator-name> ::= ?_E # vector deleting destructor
1073 // FIXME: Add a vector deleting dtor type. It goes in the vtable, so we need
1076 llvm_unreachable("not expecting a COMDAT");
1078 llvm_unreachable("Unsupported dtor type?");
1081 void MicrosoftCXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO,
1082 SourceLocation Loc) {
1086 // <operator-name> ::= ?2 # new
1087 case OO_New: Out << "?2"; break;
1088 // <operator-name> ::= ?3 # delete
1089 case OO_Delete: Out << "?3"; break;
1090 // <operator-name> ::= ?4 # =
1091 case OO_Equal: Out << "?4"; break;
1092 // <operator-name> ::= ?5 # >>
1093 case OO_GreaterGreater: Out << "?5"; break;
1094 // <operator-name> ::= ?6 # <<
1095 case OO_LessLess: Out << "?6"; break;
1096 // <operator-name> ::= ?7 # !
1097 case OO_Exclaim: Out << "?7"; break;
1098 // <operator-name> ::= ?8 # ==
1099 case OO_EqualEqual: Out << "?8"; break;
1100 // <operator-name> ::= ?9 # !=
1101 case OO_ExclaimEqual: Out << "?9"; break;
1102 // <operator-name> ::= ?A # []
1103 case OO_Subscript: Out << "?A"; break;
1105 // <operator-name> ::= ?C # ->
1106 case OO_Arrow: Out << "?C"; break;
1107 // <operator-name> ::= ?D # *
1108 case OO_Star: Out << "?D"; break;
1109 // <operator-name> ::= ?E # ++
1110 case OO_PlusPlus: Out << "?E"; break;
1111 // <operator-name> ::= ?F # --
1112 case OO_MinusMinus: Out << "?F"; break;
1113 // <operator-name> ::= ?G # -
1114 case OO_Minus: Out << "?G"; break;
1115 // <operator-name> ::= ?H # +
1116 case OO_Plus: Out << "?H"; break;
1117 // <operator-name> ::= ?I # &
1118 case OO_Amp: Out << "?I"; break;
1119 // <operator-name> ::= ?J # ->*
1120 case OO_ArrowStar: Out << "?J"; break;
1121 // <operator-name> ::= ?K # /
1122 case OO_Slash: Out << "?K"; break;
1123 // <operator-name> ::= ?L # %
1124 case OO_Percent: Out << "?L"; break;
1125 // <operator-name> ::= ?M # <
1126 case OO_Less: Out << "?M"; break;
1127 // <operator-name> ::= ?N # <=
1128 case OO_LessEqual: Out << "?N"; break;
1129 // <operator-name> ::= ?O # >
1130 case OO_Greater: Out << "?O"; break;
1131 // <operator-name> ::= ?P # >=
1132 case OO_GreaterEqual: Out << "?P"; break;
1133 // <operator-name> ::= ?Q # ,
1134 case OO_Comma: Out << "?Q"; break;
1135 // <operator-name> ::= ?R # ()
1136 case OO_Call: Out << "?R"; break;
1137 // <operator-name> ::= ?S # ~
1138 case OO_Tilde: Out << "?S"; break;
1139 // <operator-name> ::= ?T # ^
1140 case OO_Caret: Out << "?T"; break;
1141 // <operator-name> ::= ?U # |
1142 case OO_Pipe: Out << "?U"; break;
1143 // <operator-name> ::= ?V # &&
1144 case OO_AmpAmp: Out << "?V"; break;
1145 // <operator-name> ::= ?W # ||
1146 case OO_PipePipe: Out << "?W"; break;
1147 // <operator-name> ::= ?X # *=
1148 case OO_StarEqual: Out << "?X"; break;
1149 // <operator-name> ::= ?Y # +=
1150 case OO_PlusEqual: Out << "?Y"; break;
1151 // <operator-name> ::= ?Z # -=
1152 case OO_MinusEqual: Out << "?Z"; break;
1153 // <operator-name> ::= ?_0 # /=
1154 case OO_SlashEqual: Out << "?_0"; break;
1155 // <operator-name> ::= ?_1 # %=
1156 case OO_PercentEqual: Out << "?_1"; break;
1157 // <operator-name> ::= ?_2 # >>=
1158 case OO_GreaterGreaterEqual: Out << "?_2"; break;
1159 // <operator-name> ::= ?_3 # <<=
1160 case OO_LessLessEqual: Out << "?_3"; break;
1161 // <operator-name> ::= ?_4 # &=
1162 case OO_AmpEqual: Out << "?_4"; break;
1163 // <operator-name> ::= ?_5 # |=
1164 case OO_PipeEqual: Out << "?_5"; break;
1165 // <operator-name> ::= ?_6 # ^=
1166 case OO_CaretEqual: Out << "?_6"; break;
1171 // ?_B # local static guard
1173 // ?_D # vbase destructor
1174 // ?_E # vector deleting destructor
1175 // ?_F # default constructor closure
1176 // ?_G # scalar deleting destructor
1177 // ?_H # vector constructor iterator
1178 // ?_I # vector destructor iterator
1179 // ?_J # vector vbase constructor iterator
1180 // ?_K # virtual displacement map
1181 // ?_L # eh vector constructor iterator
1182 // ?_M # eh vector destructor iterator
1183 // ?_N # eh vector vbase constructor iterator
1184 // ?_O # copy constructor closure
1185 // ?_P<name> # udt returning <name>
1187 // ?_R0 # RTTI Type Descriptor
1188 // ?_R1 # RTTI Base Class Descriptor at (a,b,c,d)
1189 // ?_R2 # RTTI Base Class Array
1190 // ?_R3 # RTTI Class Hierarchy Descriptor
1191 // ?_R4 # RTTI Complete Object Locator
1192 // ?_S # local vftable
1193 // ?_T # local vftable constructor closure
1194 // <operator-name> ::= ?_U # new[]
1195 case OO_Array_New: Out << "?_U"; break;
1196 // <operator-name> ::= ?_V # delete[]
1197 case OO_Array_Delete: Out << "?_V"; break;
1198 // <operator-name> ::= ?__L # co_await
1199 case OO_Coawait: Out << "?__L"; break;
1201 case OO_Spaceship: {
1202 // FIXME: Once MS picks a mangling, use it.
1203 DiagnosticsEngine &Diags = Context.getDiags();
1204 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
1205 "cannot mangle this three-way comparison operator yet");
1206 Diags.Report(Loc, DiagID);
1210 case OO_Conditional: {
1211 DiagnosticsEngine &Diags = Context.getDiags();
1212 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
1213 "cannot mangle this conditional operator yet");
1214 Diags.Report(Loc, DiagID);
1219 case NUM_OVERLOADED_OPERATORS:
1220 llvm_unreachable("Not an overloaded operator");
1224 void MicrosoftCXXNameMangler::mangleSourceName(StringRef Name) {
1225 // <source name> ::= <identifier> @
1226 BackRefVec::iterator Found =
1227 std::find(NameBackReferences.begin(), NameBackReferences.end(), Name);
1228 if (Found == NameBackReferences.end()) {
1229 if (NameBackReferences.size() < 10)
1230 NameBackReferences.push_back(Name);
1233 Out << (Found - NameBackReferences.begin());
1237 void MicrosoftCXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) {
1238 Context.mangleObjCMethodName(MD, Out);
1241 void MicrosoftCXXNameMangler::mangleTemplateInstantiationName(
1242 const TemplateDecl *TD, const TemplateArgumentList &TemplateArgs) {
1243 // <template-name> ::= <unscoped-template-name> <template-args>
1244 // ::= <substitution>
1245 // Always start with the unqualified name.
1247 // Templates have their own context for back references.
1248 ArgBackRefMap OuterArgsContext;
1249 BackRefVec OuterTemplateContext;
1250 PassObjectSizeArgsSet OuterPassObjectSizeArgs;
1251 NameBackReferences.swap(OuterTemplateContext);
1252 TypeBackReferences.swap(OuterArgsContext);
1253 PassObjectSizeArgs.swap(OuterPassObjectSizeArgs);
1255 mangleUnscopedTemplateName(TD);
1256 mangleTemplateArgs(TD, TemplateArgs);
1258 // Restore the previous back reference contexts.
1259 NameBackReferences.swap(OuterTemplateContext);
1260 TypeBackReferences.swap(OuterArgsContext);
1261 PassObjectSizeArgs.swap(OuterPassObjectSizeArgs);
1265 MicrosoftCXXNameMangler::mangleUnscopedTemplateName(const TemplateDecl *TD) {
1266 // <unscoped-template-name> ::= ?$ <unqualified-name>
1268 mangleUnqualifiedName(TD);
1271 void MicrosoftCXXNameMangler::mangleIntegerLiteral(const llvm::APSInt &Value,
1273 // <integer-literal> ::= $0 <number>
1275 // Make sure booleans are encoded as 0/1.
1276 if (IsBoolean && Value.getBoolValue())
1278 else if (Value.isSigned())
1279 mangleNumber(Value.getSExtValue());
1281 mangleNumber(Value.getZExtValue());
1284 void MicrosoftCXXNameMangler::mangleExpression(const Expr *E) {
1285 // See if this is a constant expression.
1287 if (E->isIntegerConstantExpr(Value, Context.getASTContext())) {
1288 mangleIntegerLiteral(Value, E->getType()->isBooleanType());
1292 // Look through no-op casts like template parameter substitutions.
1293 E = E->IgnoreParenNoopCasts(Context.getASTContext());
1295 const CXXUuidofExpr *UE = nullptr;
1296 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
1297 if (UO->getOpcode() == UO_AddrOf)
1298 UE = dyn_cast<CXXUuidofExpr>(UO->getSubExpr());
1300 UE = dyn_cast<CXXUuidofExpr>(E);
1303 // If we had to peek through an address-of operator, treat this like we are
1304 // dealing with a pointer type. Otherwise, treat it like a const reference.
1306 // N.B. This matches up with the handling of TemplateArgument::Declaration
1307 // in mangleTemplateArg
1313 // This CXXUuidofExpr is mangled as-if it were actually a VarDecl from
1314 // const __s_GUID _GUID_{lower case UUID with underscores}
1315 StringRef Uuid = UE->getUuidStr();
1316 std::string Name = "_GUID_" + Uuid.lower();
1317 std::replace(Name.begin(), Name.end(), '-', '_');
1319 mangleSourceName(Name);
1320 // Terminate the whole name with an '@'.
1322 // It's a global variable.
1324 // It's a struct called __s_GUID.
1325 mangleArtificalTagType(TTK_Struct, "__s_GUID");
1331 // As bad as this diagnostic is, it's better than crashing.
1332 DiagnosticsEngine &Diags = Context.getDiags();
1333 unsigned DiagID = Diags.getCustomDiagID(
1334 DiagnosticsEngine::Error, "cannot yet mangle expression type %0");
1335 Diags.Report(E->getExprLoc(), DiagID) << E->getStmtClassName()
1336 << E->getSourceRange();
1339 void MicrosoftCXXNameMangler::mangleTemplateArgs(
1340 const TemplateDecl *TD, const TemplateArgumentList &TemplateArgs) {
1341 // <template-args> ::= <template-arg>+
1342 const TemplateParameterList *TPL = TD->getTemplateParameters();
1343 assert(TPL->size() == TemplateArgs.size() &&
1344 "size mismatch between args and parms!");
1347 for (const TemplateArgument &TA : TemplateArgs.asArray())
1348 mangleTemplateArg(TD, TA, TPL->getParam(Idx++));
1351 void MicrosoftCXXNameMangler::mangleTemplateArg(const TemplateDecl *TD,
1352 const TemplateArgument &TA,
1353 const NamedDecl *Parm) {
1354 // <template-arg> ::= <type>
1355 // ::= <integer-literal>
1356 // ::= <member-data-pointer>
1357 // ::= <member-function-pointer>
1358 // ::= $E? <name> <type-encoding>
1359 // ::= $1? <name> <type-encoding>
1361 // ::= <template-args>
1363 switch (TA.getKind()) {
1364 case TemplateArgument::Null:
1365 llvm_unreachable("Can't mangle null template arguments!");
1366 case TemplateArgument::TemplateExpansion:
1367 llvm_unreachable("Can't mangle template expansion arguments!");
1368 case TemplateArgument::Type: {
1369 QualType T = TA.getAsType();
1370 mangleType(T, SourceRange(), QMM_Escape);
1373 case TemplateArgument::Declaration: {
1374 const NamedDecl *ND = TA.getAsDecl();
1375 if (isa<FieldDecl>(ND) || isa<IndirectFieldDecl>(ND)) {
1376 mangleMemberDataPointer(cast<CXXRecordDecl>(ND->getDeclContext())
1377 ->getMostRecentNonInjectedDecl(),
1378 cast<ValueDecl>(ND));
1379 } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
1380 const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD);
1381 if (MD && MD->isInstance()) {
1382 mangleMemberFunctionPointer(
1383 MD->getParent()->getMostRecentNonInjectedDecl(), MD);
1387 mangleFunctionEncoding(FD, /*ShouldMangle=*/true);
1390 mangle(ND, TA.getParamTypeForDecl()->isReferenceType() ? "$E?" : "$1?");
1394 case TemplateArgument::Integral:
1395 mangleIntegerLiteral(TA.getAsIntegral(),
1396 TA.getIntegralType()->isBooleanType());
1398 case TemplateArgument::NullPtr: {
1399 QualType T = TA.getNullPtrType();
1400 if (const MemberPointerType *MPT = T->getAs<MemberPointerType>()) {
1401 const CXXRecordDecl *RD = MPT->getMostRecentCXXRecordDecl();
1402 if (MPT->isMemberFunctionPointerType() &&
1403 !isa<FunctionTemplateDecl>(TD)) {
1404 mangleMemberFunctionPointer(RD, nullptr);
1407 if (MPT->isMemberDataPointer()) {
1408 if (!isa<FunctionTemplateDecl>(TD)) {
1409 mangleMemberDataPointer(RD, nullptr);
1412 // nullptr data pointers are always represented with a single field
1413 // which is initialized with either 0 or -1. Why -1? Well, we need to
1414 // distinguish the case where the data member is at offset zero in the
1416 // However, we are free to use 0 *if* we would use multiple fields for
1417 // non-nullptr member pointers.
1418 if (!RD->nullFieldOffsetIsZero()) {
1419 mangleIntegerLiteral(llvm::APSInt::get(-1), /*IsBoolean=*/false);
1424 mangleIntegerLiteral(llvm::APSInt::getUnsigned(0), /*IsBoolean=*/false);
1427 case TemplateArgument::Expression:
1428 mangleExpression(TA.getAsExpr());
1430 case TemplateArgument::Pack: {
1431 ArrayRef<TemplateArgument> TemplateArgs = TA.getPackAsArray();
1432 if (TemplateArgs.empty()) {
1433 if (isa<TemplateTypeParmDecl>(Parm) ||
1434 isa<TemplateTemplateParmDecl>(Parm))
1435 // MSVC 2015 changed the mangling for empty expanded template packs,
1436 // use the old mangling for link compatibility for old versions.
1437 Out << (Context.getASTContext().getLangOpts().isCompatibleWithMSVC(
1438 LangOptions::MSVC2015)
1441 else if (isa<NonTypeTemplateParmDecl>(Parm))
1444 llvm_unreachable("unexpected template parameter decl!");
1446 for (const TemplateArgument &PA : TemplateArgs)
1447 mangleTemplateArg(TD, PA, Parm);
1451 case TemplateArgument::Template: {
1452 const NamedDecl *ND =
1453 TA.getAsTemplate().getAsTemplateDecl()->getTemplatedDecl();
1454 if (const auto *TD = dyn_cast<TagDecl>(ND)) {
1456 } else if (isa<TypeAliasDecl>(ND)) {
1460 llvm_unreachable("unexpected template template NamedDecl!");
1467 void MicrosoftCXXNameMangler::mangleObjCProtocol(const ObjCProtocolDecl *PD) {
1468 llvm::SmallString<64> TemplateMangling;
1469 llvm::raw_svector_ostream Stream(TemplateMangling);
1470 MicrosoftCXXNameMangler Extra(Context, Stream);
1473 Extra.mangleSourceName("Protocol");
1474 Extra.mangleArtificalTagType(TTK_Struct, PD->getName());
1476 mangleArtificalTagType(TTK_Struct, TemplateMangling, {"__ObjC"});
1479 void MicrosoftCXXNameMangler::mangleObjCLifetime(const QualType Type,
1481 SourceRange Range) {
1482 llvm::SmallString<64> TemplateMangling;
1483 llvm::raw_svector_ostream Stream(TemplateMangling);
1484 MicrosoftCXXNameMangler Extra(Context, Stream);
1487 switch (Quals.getObjCLifetime()) {
1488 case Qualifiers::OCL_None:
1489 case Qualifiers::OCL_ExplicitNone:
1491 case Qualifiers::OCL_Autoreleasing:
1492 Extra.mangleSourceName("Autoreleasing");
1494 case Qualifiers::OCL_Strong:
1495 Extra.mangleSourceName("Strong");
1497 case Qualifiers::OCL_Weak:
1498 Extra.mangleSourceName("Weak");
1501 Extra.manglePointerCVQualifiers(Quals);
1502 Extra.manglePointerExtQualifiers(Quals, Type);
1503 Extra.mangleType(Type, Range);
1505 mangleArtificalTagType(TTK_Struct, TemplateMangling, {"__ObjC"});
1508 void MicrosoftCXXNameMangler::mangleQualifiers(Qualifiers Quals,
1510 // <cvr-qualifiers> ::= [E] [F] [I] <base-cvr-qualifiers>
1511 // 'E' means __ptr64 (32-bit only); 'F' means __unaligned (32/64-bit only);
1512 // 'I' means __restrict (32/64-bit).
1513 // Note that the MSVC __restrict keyword isn't the same as the C99 restrict
1515 // <base-cvr-qualifiers> ::= A # near
1516 // ::= B # near const
1517 // ::= C # near volatile
1518 // ::= D # near const volatile
1519 // ::= E # far (16-bit)
1520 // ::= F # far const (16-bit)
1521 // ::= G # far volatile (16-bit)
1522 // ::= H # far const volatile (16-bit)
1523 // ::= I # huge (16-bit)
1524 // ::= J # huge const (16-bit)
1525 // ::= K # huge volatile (16-bit)
1526 // ::= L # huge const volatile (16-bit)
1527 // ::= M <basis> # based
1528 // ::= N <basis> # based const
1529 // ::= O <basis> # based volatile
1530 // ::= P <basis> # based const volatile
1531 // ::= Q # near member
1532 // ::= R # near const member
1533 // ::= S # near volatile member
1534 // ::= T # near const volatile member
1535 // ::= U # far member (16-bit)
1536 // ::= V # far const member (16-bit)
1537 // ::= W # far volatile member (16-bit)
1538 // ::= X # far const volatile member (16-bit)
1539 // ::= Y # huge member (16-bit)
1540 // ::= Z # huge const member (16-bit)
1541 // ::= 0 # huge volatile member (16-bit)
1542 // ::= 1 # huge const volatile member (16-bit)
1543 // ::= 2 <basis> # based member
1544 // ::= 3 <basis> # based const member
1545 // ::= 4 <basis> # based volatile member
1546 // ::= 5 <basis> # based const volatile member
1547 // ::= 6 # near function (pointers only)
1548 // ::= 7 # far function (pointers only)
1549 // ::= 8 # near method (pointers only)
1550 // ::= 9 # far method (pointers only)
1551 // ::= _A <basis> # based function (pointers only)
1552 // ::= _B <basis> # based function (far?) (pointers only)
1553 // ::= _C <basis> # based method (pointers only)
1554 // ::= _D <basis> # based method (far?) (pointers only)
1555 // ::= _E # block (Clang)
1556 // <basis> ::= 0 # __based(void)
1557 // ::= 1 # __based(segment)?
1558 // ::= 2 <name> # __based(name)
1561 // ::= 5 # not really based
1562 bool HasConst = Quals.hasConst(),
1563 HasVolatile = Quals.hasVolatile();
1566 if (HasConst && HasVolatile) {
1568 } else if (HasVolatile) {
1570 } else if (HasConst) {
1576 if (HasConst && HasVolatile) {
1578 } else if (HasVolatile) {
1580 } else if (HasConst) {
1587 // FIXME: For now, just drop all extension qualifiers on the floor.
1591 MicrosoftCXXNameMangler::mangleRefQualifier(RefQualifierKind RefQualifier) {
1592 // <ref-qualifier> ::= G # lvalue reference
1593 // ::= H # rvalue-reference
1594 switch (RefQualifier) {
1608 void MicrosoftCXXNameMangler::manglePointerExtQualifiers(Qualifiers Quals,
1609 QualType PointeeType) {
1610 if (PointersAre64Bit &&
1611 (PointeeType.isNull() || !PointeeType->isFunctionType()))
1614 if (Quals.hasRestrict())
1617 if (Quals.hasUnaligned() ||
1618 (!PointeeType.isNull() && PointeeType.getLocalQualifiers().hasUnaligned()))
1622 void MicrosoftCXXNameMangler::manglePointerCVQualifiers(Qualifiers Quals) {
1623 // <pointer-cv-qualifiers> ::= P # no qualifiers
1626 // ::= S # const volatile
1627 bool HasConst = Quals.hasConst(),
1628 HasVolatile = Quals.hasVolatile();
1630 if (HasConst && HasVolatile) {
1632 } else if (HasVolatile) {
1634 } else if (HasConst) {
1641 void MicrosoftCXXNameMangler::mangleArgumentType(QualType T,
1642 SourceRange Range) {
1643 // MSVC will backreference two canonically equivalent types that have slightly
1644 // different manglings when mangled alone.
1646 // Decayed types do not match up with non-decayed versions of the same type.
1649 // void (*x)(void) will not form a backreference with void x(void)
1651 if (const auto *DT = T->getAs<DecayedType>()) {
1652 QualType OriginalType = DT->getOriginalType();
1653 // All decayed ArrayTypes should be treated identically; as-if they were
1654 // a decayed IncompleteArrayType.
1655 if (const auto *AT = getASTContext().getAsArrayType(OriginalType))
1656 OriginalType = getASTContext().getIncompleteArrayType(
1657 AT->getElementType(), AT->getSizeModifier(),
1658 AT->getIndexTypeCVRQualifiers());
1660 TypePtr = OriginalType.getCanonicalType().getAsOpaquePtr();
1661 // If the original parameter was textually written as an array,
1662 // instead treat the decayed parameter like it's const.
1665 // int [] -> int * const
1666 if (OriginalType->isArrayType())
1669 TypePtr = T.getCanonicalType().getAsOpaquePtr();
1672 ArgBackRefMap::iterator Found = TypeBackReferences.find(TypePtr);
1674 if (Found == TypeBackReferences.end()) {
1675 size_t OutSizeBefore = Out.tell();
1677 mangleType(T, Range, QMM_Drop);
1679 // See if it's worth creating a back reference.
1680 // Only types longer than 1 character are considered
1681 // and only 10 back references slots are available:
1682 bool LongerThanOneChar = (Out.tell() - OutSizeBefore > 1);
1683 if (LongerThanOneChar && TypeBackReferences.size() < 10) {
1684 size_t Size = TypeBackReferences.size();
1685 TypeBackReferences[TypePtr] = Size;
1688 Out << Found->second;
1692 void MicrosoftCXXNameMangler::manglePassObjectSizeArg(
1693 const PassObjectSizeAttr *POSA) {
1694 int Type = POSA->getType();
1696 auto Iter = PassObjectSizeArgs.insert(Type).first;
1697 auto *TypePtr = (const void *)&*Iter;
1698 ArgBackRefMap::iterator Found = TypeBackReferences.find(TypePtr);
1700 if (Found == TypeBackReferences.end()) {
1701 mangleArtificalTagType(TTK_Enum, "__pass_object_size" + llvm::utostr(Type),
1704 if (TypeBackReferences.size() < 10) {
1705 size_t Size = TypeBackReferences.size();
1706 TypeBackReferences[TypePtr] = Size;
1709 Out << Found->second;
1713 void MicrosoftCXXNameMangler::mangleType(QualType T, SourceRange Range,
1714 QualifierMangleMode QMM) {
1715 // Don't use the canonical types. MSVC includes things like 'const' on
1716 // pointer arguments to function pointers that canonicalization strips away.
1717 T = T.getDesugaredType(getASTContext());
1718 Qualifiers Quals = T.getLocalQualifiers();
1719 if (const ArrayType *AT = getASTContext().getAsArrayType(T)) {
1720 // If there were any Quals, getAsArrayType() pushed them onto the array
1722 if (QMM == QMM_Mangle)
1724 else if (QMM == QMM_Escape || QMM == QMM_Result)
1726 mangleArrayType(AT);
1730 bool IsPointer = T->isAnyPointerType() || T->isMemberPointerType() ||
1731 T->isReferenceType() || T->isBlockPointerType();
1735 if (Quals.hasObjCLifetime())
1736 Quals = Quals.withoutObjCLifetime();
1739 if (const FunctionType *FT = dyn_cast<FunctionType>(T)) {
1741 mangleFunctionType(FT);
1744 mangleQualifiers(Quals, false);
1747 if (!IsPointer && Quals) {
1749 mangleQualifiers(Quals, false);
1753 // Presence of __unaligned qualifier shouldn't affect mangling here.
1754 Quals.removeUnaligned();
1755 if (Quals.hasObjCLifetime())
1756 Quals = Quals.withoutObjCLifetime();
1757 if ((!IsPointer && Quals) || isa<TagType>(T) || isArtificialTagType(T)) {
1759 mangleQualifiers(Quals, false);
1764 const Type *ty = T.getTypePtr();
1766 switch (ty->getTypeClass()) {
1767 #define ABSTRACT_TYPE(CLASS, PARENT)
1768 #define NON_CANONICAL_TYPE(CLASS, PARENT) \
1770 llvm_unreachable("can't mangle non-canonical type " #CLASS "Type"); \
1772 #define TYPE(CLASS, PARENT) \
1774 mangleType(cast<CLASS##Type>(ty), Quals, Range); \
1776 #include "clang/AST/TypeNodes.def"
1777 #undef ABSTRACT_TYPE
1778 #undef NON_CANONICAL_TYPE
1783 void MicrosoftCXXNameMangler::mangleType(const BuiltinType *T, Qualifiers,
1784 SourceRange Range) {
1785 // <type> ::= <builtin-type>
1786 // <builtin-type> ::= X # void
1787 // ::= C # signed char
1789 // ::= E # unsigned char
1791 // ::= G # unsigned short (or wchar_t if it's not a builtin)
1793 // ::= I # unsigned int
1795 // ::= K # unsigned long
1799 // ::= O # long double (__float80 is mangled differently)
1800 // ::= _J # long long, __int64
1801 // ::= _K # unsigned long long, __int64
1802 // ::= _L # __int128
1803 // ::= _M # unsigned __int128
1805 // _O # <array in parameter>
1806 // ::= _T # __float80 (Intel)
1807 // ::= _S # char16_t
1808 // ::= _U # char32_t
1810 // ::= _Z # __float80 (Digital Mars)
1811 switch (T->getKind()) {
1812 case BuiltinType::Void:
1815 case BuiltinType::SChar:
1818 case BuiltinType::Char_U:
1819 case BuiltinType::Char_S:
1822 case BuiltinType::UChar:
1825 case BuiltinType::Short:
1828 case BuiltinType::UShort:
1831 case BuiltinType::Int:
1834 case BuiltinType::UInt:
1837 case BuiltinType::Long:
1840 case BuiltinType::ULong:
1843 case BuiltinType::Float:
1846 case BuiltinType::Double:
1849 // TODO: Determine size and mangle accordingly
1850 case BuiltinType::LongDouble:
1853 case BuiltinType::LongLong:
1856 case BuiltinType::ULongLong:
1859 case BuiltinType::Int128:
1862 case BuiltinType::UInt128:
1865 case BuiltinType::Bool:
1868 case BuiltinType::Char16:
1871 case BuiltinType::Char32:
1874 case BuiltinType::WChar_S:
1875 case BuiltinType::WChar_U:
1879 #define BUILTIN_TYPE(Id, SingletonId)
1880 #define PLACEHOLDER_TYPE(Id, SingletonId) \
1881 case BuiltinType::Id:
1882 #include "clang/AST/BuiltinTypes.def"
1883 case BuiltinType::Dependent:
1884 llvm_unreachable("placeholder types shouldn't get to name mangling");
1886 case BuiltinType::ObjCId:
1887 mangleArtificalTagType(TTK_Struct, ".objc_object");
1889 case BuiltinType::ObjCClass:
1890 mangleArtificalTagType(TTK_Struct, ".objc_class");
1892 case BuiltinType::ObjCSel:
1893 mangleArtificalTagType(TTK_Struct, ".objc_selector");
1896 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
1897 case BuiltinType::Id: \
1898 Out << "PAUocl_" #ImgType "_" #Suffix "@@"; \
1900 #include "clang/Basic/OpenCLImageTypes.def"
1901 case BuiltinType::OCLSampler:
1903 mangleArtificalTagType(TTK_Struct, "ocl_sampler");
1905 case BuiltinType::OCLEvent:
1907 mangleArtificalTagType(TTK_Struct, "ocl_event");
1909 case BuiltinType::OCLClkEvent:
1911 mangleArtificalTagType(TTK_Struct, "ocl_clkevent");
1913 case BuiltinType::OCLQueue:
1915 mangleArtificalTagType(TTK_Struct, "ocl_queue");
1917 case BuiltinType::OCLReserveID:
1919 mangleArtificalTagType(TTK_Struct, "ocl_reserveid");
1922 case BuiltinType::NullPtr:
1926 case BuiltinType::Float16:
1927 mangleArtificalTagType(TTK_Struct, "_Float16", {"__clang"});
1930 case BuiltinType::Half:
1931 mangleArtificalTagType(TTK_Struct, "_Half", {"__clang"});
1934 case BuiltinType::ShortAccum:
1935 case BuiltinType::Accum:
1936 case BuiltinType::LongAccum:
1937 case BuiltinType::UShortAccum:
1938 case BuiltinType::UAccum:
1939 case BuiltinType::ULongAccum:
1940 case BuiltinType::ShortFract:
1941 case BuiltinType::Fract:
1942 case BuiltinType::LongFract:
1943 case BuiltinType::UShortFract:
1944 case BuiltinType::UFract:
1945 case BuiltinType::ULongFract:
1946 case BuiltinType::SatShortAccum:
1947 case BuiltinType::SatAccum:
1948 case BuiltinType::SatLongAccum:
1949 case BuiltinType::SatUShortAccum:
1950 case BuiltinType::SatUAccum:
1951 case BuiltinType::SatULongAccum:
1952 case BuiltinType::SatShortFract:
1953 case BuiltinType::SatFract:
1954 case BuiltinType::SatLongFract:
1955 case BuiltinType::SatUShortFract:
1956 case BuiltinType::SatUFract:
1957 case BuiltinType::SatULongFract:
1958 case BuiltinType::Char8:
1959 case BuiltinType::Float128: {
1960 DiagnosticsEngine &Diags = Context.getDiags();
1961 unsigned DiagID = Diags.getCustomDiagID(
1962 DiagnosticsEngine::Error, "cannot mangle this built-in %0 type yet");
1963 Diags.Report(Range.getBegin(), DiagID)
1964 << T->getName(Context.getASTContext().getPrintingPolicy()) << Range;
1970 // <type> ::= <function-type>
1971 void MicrosoftCXXNameMangler::mangleType(const FunctionProtoType *T, Qualifiers,
1973 // Structors only appear in decls, so at this point we know it's not a
1975 // FIXME: This may not be lambda-friendly.
1976 if (T->getTypeQuals() || T->getRefQualifier() != RQ_None) {
1978 mangleFunctionType(T, /*D=*/nullptr, /*ForceThisQuals=*/true);
1981 mangleFunctionType(T);
1984 void MicrosoftCXXNameMangler::mangleType(const FunctionNoProtoType *T,
1985 Qualifiers, SourceRange) {
1987 mangleFunctionType(T);
1990 void MicrosoftCXXNameMangler::mangleFunctionType(const FunctionType *T,
1991 const FunctionDecl *D,
1992 bool ForceThisQuals) {
1993 // <function-type> ::= <this-cvr-qualifiers> <calling-convention>
1994 // <return-type> <argument-list> <throw-spec>
1995 const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(T);
1998 if (D) Range = D->getSourceRange();
2000 bool IsInLambda = false;
2001 bool IsStructor = false, HasThisQuals = ForceThisQuals, IsCtorClosure = false;
2002 CallingConv CC = T->getCallConv();
2003 if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(D)) {
2004 if (MD->getParent()->isLambda())
2006 if (MD->isInstance())
2007 HasThisQuals = true;
2008 if (isa<CXXDestructorDecl>(MD)) {
2010 } else if (isa<CXXConstructorDecl>(MD)) {
2012 IsCtorClosure = (StructorType == Ctor_CopyingClosure ||
2013 StructorType == Ctor_DefaultClosure) &&
2016 CC = getASTContext().getDefaultCallingConvention(
2017 /*IsVariadic=*/false, /*IsCXXMethod=*/true);
2021 // If this is a C++ instance method, mangle the CVR qualifiers for the
2024 Qualifiers Quals = Qualifiers::fromCVRUMask(Proto->getTypeQuals());
2025 manglePointerExtQualifiers(Quals, /*PointeeType=*/QualType());
2026 mangleRefQualifier(Proto->getRefQualifier());
2027 mangleQualifiers(Quals, /*IsMember=*/false);
2030 mangleCallingConvention(CC);
2032 // <return-type> ::= <type>
2033 // ::= @ # structors (they have no declared return type)
2035 if (isa<CXXDestructorDecl>(D) && isStructorDecl(D)) {
2036 // The scalar deleting destructor takes an extra int argument which is not
2037 // reflected in the AST.
2038 if (StructorType == Dtor_Deleting) {
2039 Out << (PointersAre64Bit ? "PEAXI@Z" : "PAXI@Z");
2042 // The vbase destructor returns void which is not reflected in the AST.
2043 if (StructorType == Dtor_Complete) {
2048 if (IsCtorClosure) {
2049 // Default constructor closure and copy constructor closure both return
2053 if (StructorType == Ctor_DefaultClosure) {
2054 // Default constructor closure always has no arguments.
2056 } else if (StructorType == Ctor_CopyingClosure) {
2057 // Copy constructor closure always takes an unqualified reference.
2058 mangleArgumentType(getASTContext().getLValueReferenceType(
2059 Proto->getParamType(0)
2060 ->getAs<LValueReferenceType>()
2062 /*SpelledAsLValue=*/true),
2066 llvm_unreachable("unexpected constructor closure!");
2073 QualType ResultType = T->getReturnType();
2074 if (const auto *AT =
2075 dyn_cast_or_null<AutoType>(ResultType->getContainedAutoType())) {
2077 mangleQualifiers(ResultType.getLocalQualifiers(), /*IsMember=*/false);
2079 assert(AT->getKeyword() != AutoTypeKeyword::GNUAutoType &&
2080 "shouldn't need to mangle __auto_type!");
2081 mangleSourceName(AT->isDecltypeAuto() ? "<decltype-auto>" : "<auto>");
2083 } else if (IsInLambda) {
2086 if (ResultType->isVoidType())
2087 ResultType = ResultType.getUnqualifiedType();
2088 mangleType(ResultType, Range, QMM_Result);
2092 // <argument-list> ::= X # void
2094 // ::= <type>* Z # varargs
2096 // Function types without prototypes can arise when mangling a function type
2097 // within an overloadable function in C. We mangle these as the absence of
2098 // any parameter types (not even an empty parameter list).
2100 } else if (Proto->getNumParams() == 0 && !Proto->isVariadic()) {
2103 // Happens for function pointer type arguments for example.
2104 for (unsigned I = 0, E = Proto->getNumParams(); I != E; ++I) {
2105 mangleArgumentType(Proto->getParamType(I), Range);
2106 // Mangle each pass_object_size parameter as if it's a parameter of enum
2107 // type passed directly after the parameter with the pass_object_size
2108 // attribute. The aforementioned enum's name is __pass_object_size, and we
2109 // pretend it resides in a top-level namespace called __clang.
2111 // FIXME: Is there a defined extension notation for the MS ABI, or is it
2112 // necessary to just cross our fingers and hope this type+namespace
2113 // combination doesn't conflict with anything?
2115 if (const auto *P = D->getParamDecl(I)->getAttr<PassObjectSizeAttr>())
2116 manglePassObjectSizeArg(P);
2118 // <builtin-type> ::= Z # ellipsis
2119 if (Proto->isVariadic())
2125 mangleThrowSpecification(Proto);
2128 void MicrosoftCXXNameMangler::mangleFunctionClass(const FunctionDecl *FD) {
2129 // <function-class> ::= <member-function> E? # E designates a 64-bit 'this'
2130 // # pointer. in 64-bit mode *all*
2131 // # 'this' pointers are 64-bit.
2132 // ::= <global-function>
2133 // <member-function> ::= A # private: near
2134 // ::= B # private: far
2135 // ::= C # private: static near
2136 // ::= D # private: static far
2137 // ::= E # private: virtual near
2138 // ::= F # private: virtual far
2139 // ::= I # protected: near
2140 // ::= J # protected: far
2141 // ::= K # protected: static near
2142 // ::= L # protected: static far
2143 // ::= M # protected: virtual near
2144 // ::= N # protected: virtual far
2145 // ::= Q # public: near
2146 // ::= R # public: far
2147 // ::= S # public: static near
2148 // ::= T # public: static far
2149 // ::= U # public: virtual near
2150 // ::= V # public: virtual far
2151 // <global-function> ::= Y # global near
2152 // ::= Z # global far
2153 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
2154 bool IsVirtual = MD->isVirtual();
2155 // When mangling vbase destructor variants, ignore whether or not the
2156 // underlying destructor was defined to be virtual.
2157 if (isa<CXXDestructorDecl>(MD) && isStructorDecl(MD) &&
2158 StructorType == Dtor_Complete) {
2161 switch (MD->getAccess()) {
2163 llvm_unreachable("Unsupported access specifier");
2192 void MicrosoftCXXNameMangler::mangleCallingConvention(CallingConv CC) {
2193 // <calling-convention> ::= A # __cdecl
2194 // ::= B # __export __cdecl
2196 // ::= D # __export __pascal
2197 // ::= E # __thiscall
2198 // ::= F # __export __thiscall
2199 // ::= G # __stdcall
2200 // ::= H # __export __stdcall
2201 // ::= I # __fastcall
2202 // ::= J # __export __fastcall
2203 // ::= Q # __vectorcall
2204 // ::= w # __regcall
2205 // The 'export' calling conventions are from a bygone era
2206 // (*cough*Win16*cough*) when functions were declared for export with
2207 // that keyword. (It didn't actually export them, it just made them so
2208 // that they could be in a DLL and somebody from another module could call
2213 llvm_unreachable("Unsupported CC for mangling");
2216 case CC_C: Out << 'A'; break;
2217 case CC_X86Pascal: Out << 'C'; break;
2218 case CC_X86ThisCall: Out << 'E'; break;
2219 case CC_X86StdCall: Out << 'G'; break;
2220 case CC_X86FastCall: Out << 'I'; break;
2221 case CC_X86VectorCall: Out << 'Q'; break;
2222 case CC_Swift: Out << 'S'; break;
2223 case CC_PreserveMost: Out << 'U'; break;
2224 case CC_X86RegCall: Out << 'w'; break;
2227 void MicrosoftCXXNameMangler::mangleCallingConvention(const FunctionType *T) {
2228 mangleCallingConvention(T->getCallConv());
2230 void MicrosoftCXXNameMangler::mangleThrowSpecification(
2231 const FunctionProtoType *FT) {
2232 // <throw-spec> ::= Z # throw(...) (default)
2233 // ::= @ # throw() or __declspec/__attribute__((nothrow))
2235 // NOTE: Since the Microsoft compiler ignores throw specifications, they are
2236 // all actually mangled as 'Z'. (They're ignored because their associated
2237 // functionality isn't implemented, and probably never will be.)
2241 void MicrosoftCXXNameMangler::mangleType(const UnresolvedUsingType *T,
2242 Qualifiers, SourceRange Range) {
2243 // Probably should be mangled as a template instantiation; need to see what
2245 DiagnosticsEngine &Diags = Context.getDiags();
2246 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2247 "cannot mangle this unresolved dependent type yet");
2248 Diags.Report(Range.getBegin(), DiagID)
2252 // <type> ::= <union-type> | <struct-type> | <class-type> | <enum-type>
2253 // <union-type> ::= T <name>
2254 // <struct-type> ::= U <name>
2255 // <class-type> ::= V <name>
2256 // <enum-type> ::= W4 <name>
2257 void MicrosoftCXXNameMangler::mangleTagTypeKind(TagTypeKind TTK) {
2274 void MicrosoftCXXNameMangler::mangleType(const EnumType *T, Qualifiers,
2276 mangleType(cast<TagType>(T)->getDecl());
2278 void MicrosoftCXXNameMangler::mangleType(const RecordType *T, Qualifiers,
2280 mangleType(cast<TagType>(T)->getDecl());
2282 void MicrosoftCXXNameMangler::mangleType(const TagDecl *TD) {
2283 mangleTagTypeKind(TD->getTagKind());
2287 // If you add a call to this, consider updating isArtificialTagType() too.
2288 void MicrosoftCXXNameMangler::mangleArtificalTagType(
2289 TagTypeKind TK, StringRef UnqualifiedName,
2290 ArrayRef<StringRef> NestedNames) {
2291 // <name> ::= <unscoped-name> {[<named-scope>]+ | [<nested-name>]}? @
2292 mangleTagTypeKind(TK);
2294 // Always start with the unqualified name.
2295 mangleSourceName(UnqualifiedName);
2297 for (auto I = NestedNames.rbegin(), E = NestedNames.rend(); I != E; ++I)
2298 mangleSourceName(*I);
2300 // Terminate the whole name with an '@'.
2304 // <type> ::= <array-type>
2305 // <array-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers>
2306 // [Y <dimension-count> <dimension>+]
2307 // <element-type> # as global, E is never required
2308 // It's supposed to be the other way around, but for some strange reason, it
2309 // isn't. Today this behavior is retained for the sole purpose of backwards
2311 void MicrosoftCXXNameMangler::mangleDecayedArrayType(const ArrayType *T) {
2312 // This isn't a recursive mangling, so now we have to do it all in this
2314 manglePointerCVQualifiers(T->getElementType().getQualifiers());
2315 mangleType(T->getElementType(), SourceRange());
2317 void MicrosoftCXXNameMangler::mangleType(const ConstantArrayType *T, Qualifiers,
2319 llvm_unreachable("Should have been special cased");
2321 void MicrosoftCXXNameMangler::mangleType(const VariableArrayType *T, Qualifiers,
2323 llvm_unreachable("Should have been special cased");
2325 void MicrosoftCXXNameMangler::mangleType(const DependentSizedArrayType *T,
2326 Qualifiers, SourceRange) {
2327 llvm_unreachable("Should have been special cased");
2329 void MicrosoftCXXNameMangler::mangleType(const IncompleteArrayType *T,
2330 Qualifiers, SourceRange) {
2331 llvm_unreachable("Should have been special cased");
2333 void MicrosoftCXXNameMangler::mangleArrayType(const ArrayType *T) {
2334 QualType ElementTy(T, 0);
2335 SmallVector<llvm::APInt, 3> Dimensions;
2337 if (ElementTy->isConstantArrayType()) {
2338 const ConstantArrayType *CAT =
2339 getASTContext().getAsConstantArrayType(ElementTy);
2340 Dimensions.push_back(CAT->getSize());
2341 ElementTy = CAT->getElementType();
2342 } else if (ElementTy->isIncompleteArrayType()) {
2343 const IncompleteArrayType *IAT =
2344 getASTContext().getAsIncompleteArrayType(ElementTy);
2345 Dimensions.push_back(llvm::APInt(32, 0));
2346 ElementTy = IAT->getElementType();
2347 } else if (ElementTy->isVariableArrayType()) {
2348 const VariableArrayType *VAT =
2349 getASTContext().getAsVariableArrayType(ElementTy);
2350 Dimensions.push_back(llvm::APInt(32, 0));
2351 ElementTy = VAT->getElementType();
2352 } else if (ElementTy->isDependentSizedArrayType()) {
2353 // The dependent expression has to be folded into a constant (TODO).
2354 const DependentSizedArrayType *DSAT =
2355 getASTContext().getAsDependentSizedArrayType(ElementTy);
2356 DiagnosticsEngine &Diags = Context.getDiags();
2357 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2358 "cannot mangle this dependent-length array yet");
2359 Diags.Report(DSAT->getSizeExpr()->getExprLoc(), DiagID)
2360 << DSAT->getBracketsRange();
2367 // <dimension-count> ::= <number> # number of extra dimensions
2368 mangleNumber(Dimensions.size());
2369 for (const llvm::APInt &Dimension : Dimensions)
2370 mangleNumber(Dimension.getLimitedValue());
2371 mangleType(ElementTy, SourceRange(), QMM_Escape);
2374 // <type> ::= <pointer-to-member-type>
2375 // <pointer-to-member-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers>
2376 // <class name> <type>
2377 void MicrosoftCXXNameMangler::mangleType(const MemberPointerType *T,
2378 Qualifiers Quals, SourceRange Range) {
2379 QualType PointeeType = T->getPointeeType();
2380 manglePointerCVQualifiers(Quals);
2381 manglePointerExtQualifiers(Quals, PointeeType);
2382 if (const FunctionProtoType *FPT = PointeeType->getAs<FunctionProtoType>()) {
2384 mangleName(T->getClass()->castAs<RecordType>()->getDecl());
2385 mangleFunctionType(FPT, nullptr, true);
2387 mangleQualifiers(PointeeType.getQualifiers(), true);
2388 mangleName(T->getClass()->castAs<RecordType>()->getDecl());
2389 mangleType(PointeeType, Range, QMM_Drop);
2393 void MicrosoftCXXNameMangler::mangleType(const TemplateTypeParmType *T,
2394 Qualifiers, SourceRange Range) {
2395 DiagnosticsEngine &Diags = Context.getDiags();
2396 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2397 "cannot mangle this template type parameter type yet");
2398 Diags.Report(Range.getBegin(), DiagID)
2402 void MicrosoftCXXNameMangler::mangleType(const SubstTemplateTypeParmPackType *T,
2403 Qualifiers, SourceRange Range) {
2404 DiagnosticsEngine &Diags = Context.getDiags();
2405 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2406 "cannot mangle this substituted parameter pack yet");
2407 Diags.Report(Range.getBegin(), DiagID)
2411 // <type> ::= <pointer-type>
2412 // <pointer-type> ::= E? <pointer-cvr-qualifiers> <cvr-qualifiers> <type>
2413 // # the E is required for 64-bit non-static pointers
2414 void MicrosoftCXXNameMangler::mangleType(const PointerType *T, Qualifiers Quals,
2415 SourceRange Range) {
2416 QualType PointeeType = T->getPointeeType();
2417 manglePointerCVQualifiers(Quals);
2418 manglePointerExtQualifiers(Quals, PointeeType);
2419 mangleType(PointeeType, Range);
2422 void MicrosoftCXXNameMangler::mangleType(const ObjCObjectPointerType *T,
2423 Qualifiers Quals, SourceRange Range) {
2424 QualType PointeeType = T->getPointeeType();
2425 switch (Quals.getObjCLifetime()) {
2426 case Qualifiers::OCL_None:
2427 case Qualifiers::OCL_ExplicitNone:
2429 case Qualifiers::OCL_Autoreleasing:
2430 case Qualifiers::OCL_Strong:
2431 case Qualifiers::OCL_Weak:
2432 return mangleObjCLifetime(PointeeType, Quals, Range);
2434 manglePointerCVQualifiers(Quals);
2435 manglePointerExtQualifiers(Quals, PointeeType);
2436 mangleType(PointeeType, Range);
2439 // <type> ::= <reference-type>
2440 // <reference-type> ::= A E? <cvr-qualifiers> <type>
2441 // # the E is required for 64-bit non-static lvalue references
2442 void MicrosoftCXXNameMangler::mangleType(const LValueReferenceType *T,
2443 Qualifiers Quals, SourceRange Range) {
2444 QualType PointeeType = T->getPointeeType();
2445 assert(!Quals.hasConst() && !Quals.hasVolatile() && "unexpected qualifier!");
2447 manglePointerExtQualifiers(Quals, PointeeType);
2448 mangleType(PointeeType, Range);
2451 // <type> ::= <r-value-reference-type>
2452 // <r-value-reference-type> ::= $$Q E? <cvr-qualifiers> <type>
2453 // # the E is required for 64-bit non-static rvalue references
2454 void MicrosoftCXXNameMangler::mangleType(const RValueReferenceType *T,
2455 Qualifiers Quals, SourceRange Range) {
2456 QualType PointeeType = T->getPointeeType();
2457 assert(!Quals.hasConst() && !Quals.hasVolatile() && "unexpected qualifier!");
2459 manglePointerExtQualifiers(Quals, PointeeType);
2460 mangleType(PointeeType, Range);
2463 void MicrosoftCXXNameMangler::mangleType(const ComplexType *T, Qualifiers,
2464 SourceRange Range) {
2465 QualType ElementType = T->getElementType();
2467 llvm::SmallString<64> TemplateMangling;
2468 llvm::raw_svector_ostream Stream(TemplateMangling);
2469 MicrosoftCXXNameMangler Extra(Context, Stream);
2471 Extra.mangleSourceName("_Complex");
2472 Extra.mangleType(ElementType, Range, QMM_Escape);
2474 mangleArtificalTagType(TTK_Struct, TemplateMangling, {"__clang"});
2477 // Returns true for types that mangleArtificalTagType() gets called for with
2478 // TTK_Union, TTK_Struct, TTK_Class and where compatibility with MSVC's
2479 // mangling matters.
2480 // (It doesn't matter for Objective-C types and the like that cl.exe doesn't
2482 bool MicrosoftCXXNameMangler::isArtificialTagType(QualType T) const {
2483 const Type *ty = T.getTypePtr();
2484 switch (ty->getTypeClass()) {
2488 case Type::Vector: {
2489 // For ABI compatibility only __m64, __m128(id), and __m256(id) matter,
2490 // but since mangleType(VectorType*) always calls mangleArtificalTagType()
2491 // just always return true (the other vector types are clang-only).
2497 void MicrosoftCXXNameMangler::mangleType(const VectorType *T, Qualifiers Quals,
2498 SourceRange Range) {
2499 const BuiltinType *ET = T->getElementType()->getAs<BuiltinType>();
2500 assert(ET && "vectors with non-builtin elements are unsupported");
2501 uint64_t Width = getASTContext().getTypeSize(T);
2502 // Pattern match exactly the typedefs in our intrinsic headers. Anything that
2503 // doesn't match the Intel types uses a custom mangling below.
2504 size_t OutSizeBefore = Out.tell();
2505 llvm::Triple::ArchType AT =
2506 getASTContext().getTargetInfo().getTriple().getArch();
2507 if (AT == llvm::Triple::x86 || AT == llvm::Triple::x86_64) {
2508 if (Width == 64 && ET->getKind() == BuiltinType::LongLong) {
2509 mangleArtificalTagType(TTK_Union, "__m64");
2510 } else if (Width >= 128) {
2511 if (ET->getKind() == BuiltinType::Float)
2512 mangleArtificalTagType(TTK_Union, "__m" + llvm::utostr(Width));
2513 else if (ET->getKind() == BuiltinType::LongLong)
2514 mangleArtificalTagType(TTK_Union, "__m" + llvm::utostr(Width) + 'i');
2515 else if (ET->getKind() == BuiltinType::Double)
2516 mangleArtificalTagType(TTK_Struct, "__m" + llvm::utostr(Width) + 'd');
2520 bool IsBuiltin = Out.tell() != OutSizeBefore;
2522 // The MS ABI doesn't have a special mangling for vector types, so we define
2523 // our own mangling to handle uses of __vector_size__ on user-specified
2524 // types, and for extensions like __v4sf.
2526 llvm::SmallString<64> TemplateMangling;
2527 llvm::raw_svector_ostream Stream(TemplateMangling);
2528 MicrosoftCXXNameMangler Extra(Context, Stream);
2530 Extra.mangleSourceName("__vector");
2531 Extra.mangleType(QualType(ET, 0), Range, QMM_Escape);
2532 Extra.mangleIntegerLiteral(llvm::APSInt::getUnsigned(T->getNumElements()),
2533 /*IsBoolean=*/false);
2535 mangleArtificalTagType(TTK_Union, TemplateMangling, {"__clang"});
2539 void MicrosoftCXXNameMangler::mangleType(const ExtVectorType *T,
2540 Qualifiers Quals, SourceRange Range) {
2541 mangleType(static_cast<const VectorType *>(T), Quals, Range);
2544 void MicrosoftCXXNameMangler::mangleType(const DependentVectorType *T,
2545 Qualifiers, SourceRange Range) {
2546 DiagnosticsEngine &Diags = Context.getDiags();
2547 unsigned DiagID = Diags.getCustomDiagID(
2548 DiagnosticsEngine::Error,
2549 "cannot mangle this dependent-sized vector type yet");
2550 Diags.Report(Range.getBegin(), DiagID) << Range;
2553 void MicrosoftCXXNameMangler::mangleType(const DependentSizedExtVectorType *T,
2554 Qualifiers, SourceRange Range) {
2555 DiagnosticsEngine &Diags = Context.getDiags();
2556 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2557 "cannot mangle this dependent-sized extended vector type yet");
2558 Diags.Report(Range.getBegin(), DiagID)
2562 void MicrosoftCXXNameMangler::mangleType(const DependentAddressSpaceType *T,
2563 Qualifiers, SourceRange Range) {
2564 DiagnosticsEngine &Diags = Context.getDiags();
2565 unsigned DiagID = Diags.getCustomDiagID(
2566 DiagnosticsEngine::Error,
2567 "cannot mangle this dependent address space type yet");
2568 Diags.Report(Range.getBegin(), DiagID) << Range;
2571 void MicrosoftCXXNameMangler::mangleType(const ObjCInterfaceType *T, Qualifiers,
2573 // ObjC interfaces are mangled as if they were structs with a name that is
2574 // not a valid C/C++ identifier
2575 mangleTagTypeKind(TTK_Struct);
2576 mangle(T->getDecl(), ".objc_cls_");
2579 void MicrosoftCXXNameMangler::mangleType(const ObjCObjectType *T, Qualifiers,
2580 SourceRange Range) {
2581 if (T->qual_empty())
2582 return mangleType(T->getBaseType(), Range, QMM_Drop);
2584 ArgBackRefMap OuterArgsContext;
2585 BackRefVec OuterTemplateContext;
2587 TypeBackReferences.swap(OuterArgsContext);
2588 NameBackReferences.swap(OuterTemplateContext);
2590 mangleTagTypeKind(TTK_Struct);
2594 mangleSourceName(".objc_object");
2595 else if (T->isObjCClass())
2596 mangleSourceName(".objc_class");
2598 mangleSourceName((".objc_cls_" + T->getInterface()->getName()).str());
2600 for (const auto &Q : T->quals())
2601 mangleObjCProtocol(Q);
2606 TypeBackReferences.swap(OuterArgsContext);
2607 NameBackReferences.swap(OuterTemplateContext);
2610 void MicrosoftCXXNameMangler::mangleType(const BlockPointerType *T,
2611 Qualifiers Quals, SourceRange Range) {
2612 QualType PointeeType = T->getPointeeType();
2613 manglePointerCVQualifiers(Quals);
2614 manglePointerExtQualifiers(Quals, PointeeType);
2618 mangleFunctionType(PointeeType->castAs<FunctionProtoType>());
2621 void MicrosoftCXXNameMangler::mangleType(const InjectedClassNameType *,
2622 Qualifiers, SourceRange) {
2623 llvm_unreachable("Cannot mangle injected class name type.");
2626 void MicrosoftCXXNameMangler::mangleType(const TemplateSpecializationType *T,
2627 Qualifiers, SourceRange Range) {
2628 DiagnosticsEngine &Diags = Context.getDiags();
2629 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2630 "cannot mangle this template specialization type yet");
2631 Diags.Report(Range.getBegin(), DiagID)
2635 void MicrosoftCXXNameMangler::mangleType(const DependentNameType *T, Qualifiers,
2636 SourceRange Range) {
2637 DiagnosticsEngine &Diags = Context.getDiags();
2638 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2639 "cannot mangle this dependent name type yet");
2640 Diags.Report(Range.getBegin(), DiagID)
2644 void MicrosoftCXXNameMangler::mangleType(
2645 const DependentTemplateSpecializationType *T, Qualifiers,
2646 SourceRange Range) {
2647 DiagnosticsEngine &Diags = Context.getDiags();
2648 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2649 "cannot mangle this dependent template specialization type yet");
2650 Diags.Report(Range.getBegin(), DiagID)
2654 void MicrosoftCXXNameMangler::mangleType(const PackExpansionType *T, Qualifiers,
2655 SourceRange Range) {
2656 DiagnosticsEngine &Diags = Context.getDiags();
2657 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2658 "cannot mangle this pack expansion yet");
2659 Diags.Report(Range.getBegin(), DiagID)
2663 void MicrosoftCXXNameMangler::mangleType(const TypeOfType *T, Qualifiers,
2664 SourceRange Range) {
2665 DiagnosticsEngine &Diags = Context.getDiags();
2666 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2667 "cannot mangle this typeof(type) yet");
2668 Diags.Report(Range.getBegin(), DiagID)
2672 void MicrosoftCXXNameMangler::mangleType(const TypeOfExprType *T, Qualifiers,
2673 SourceRange Range) {
2674 DiagnosticsEngine &Diags = Context.getDiags();
2675 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2676 "cannot mangle this typeof(expression) yet");
2677 Diags.Report(Range.getBegin(), DiagID)
2681 void MicrosoftCXXNameMangler::mangleType(const DecltypeType *T, Qualifiers,
2682 SourceRange Range) {
2683 DiagnosticsEngine &Diags = Context.getDiags();
2684 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2685 "cannot mangle this decltype() yet");
2686 Diags.Report(Range.getBegin(), DiagID)
2690 void MicrosoftCXXNameMangler::mangleType(const UnaryTransformType *T,
2691 Qualifiers, SourceRange Range) {
2692 DiagnosticsEngine &Diags = Context.getDiags();
2693 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2694 "cannot mangle this unary transform type yet");
2695 Diags.Report(Range.getBegin(), DiagID)
2699 void MicrosoftCXXNameMangler::mangleType(const AutoType *T, Qualifiers,
2700 SourceRange Range) {
2701 assert(T->getDeducedType().isNull() && "expecting a dependent type!");
2703 DiagnosticsEngine &Diags = Context.getDiags();
2704 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2705 "cannot mangle this 'auto' type yet");
2706 Diags.Report(Range.getBegin(), DiagID)
2710 void MicrosoftCXXNameMangler::mangleType(
2711 const DeducedTemplateSpecializationType *T, Qualifiers, SourceRange Range) {
2712 assert(T->getDeducedType().isNull() && "expecting a dependent type!");
2714 DiagnosticsEngine &Diags = Context.getDiags();
2715 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2716 "cannot mangle this deduced class template specialization type yet");
2717 Diags.Report(Range.getBegin(), DiagID)
2721 void MicrosoftCXXNameMangler::mangleType(const AtomicType *T, Qualifiers,
2722 SourceRange Range) {
2723 QualType ValueType = T->getValueType();
2725 llvm::SmallString<64> TemplateMangling;
2726 llvm::raw_svector_ostream Stream(TemplateMangling);
2727 MicrosoftCXXNameMangler Extra(Context, Stream);
2729 Extra.mangleSourceName("_Atomic");
2730 Extra.mangleType(ValueType, Range, QMM_Escape);
2732 mangleArtificalTagType(TTK_Struct, TemplateMangling, {"__clang"});
2735 void MicrosoftCXXNameMangler::mangleType(const PipeType *T, Qualifiers,
2736 SourceRange Range) {
2737 DiagnosticsEngine &Diags = Context.getDiags();
2738 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2739 "cannot mangle this OpenCL pipe type yet");
2740 Diags.Report(Range.getBegin(), DiagID)
2744 void MicrosoftMangleContextImpl::mangleCXXName(const NamedDecl *D,
2746 assert((isa<FunctionDecl>(D) || isa<VarDecl>(D)) &&
2747 "Invalid mangleName() call, argument is not a variable or function!");
2748 assert(!isa<CXXConstructorDecl>(D) && !isa<CXXDestructorDecl>(D) &&
2749 "Invalid mangleName() call on 'structor decl!");
2751 PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
2752 getASTContext().getSourceManager(),
2753 "Mangling declaration");
2755 msvc_hashing_ostream MHO(Out);
2756 MicrosoftCXXNameMangler Mangler(*this, MHO);
2757 return Mangler.mangle(D);
2760 // <this-adjustment> ::= <no-adjustment> | <static-adjustment> |
2761 // <virtual-adjustment>
2762 // <no-adjustment> ::= A # private near
2763 // ::= B # private far
2764 // ::= I # protected near
2765 // ::= J # protected far
2766 // ::= Q # public near
2767 // ::= R # public far
2768 // <static-adjustment> ::= G <static-offset> # private near
2769 // ::= H <static-offset> # private far
2770 // ::= O <static-offset> # protected near
2771 // ::= P <static-offset> # protected far
2772 // ::= W <static-offset> # public near
2773 // ::= X <static-offset> # public far
2774 // <virtual-adjustment> ::= $0 <virtual-shift> <static-offset> # private near
2775 // ::= $1 <virtual-shift> <static-offset> # private far
2776 // ::= $2 <virtual-shift> <static-offset> # protected near
2777 // ::= $3 <virtual-shift> <static-offset> # protected far
2778 // ::= $4 <virtual-shift> <static-offset> # public near
2779 // ::= $5 <virtual-shift> <static-offset> # public far
2780 // <virtual-shift> ::= <vtordisp-shift> | <vtordispex-shift>
2781 // <vtordisp-shift> ::= <offset-to-vtordisp>
2782 // <vtordispex-shift> ::= <offset-to-vbptr> <vbase-offset-offset>
2783 // <offset-to-vtordisp>
2784 static void mangleThunkThisAdjustment(const CXXMethodDecl *MD,
2785 const ThisAdjustment &Adjustment,
2786 MicrosoftCXXNameMangler &Mangler,
2788 if (!Adjustment.Virtual.isEmpty()) {
2791 switch (MD->getAccess()) {
2793 llvm_unreachable("Unsupported access specifier");
2803 if (Adjustment.Virtual.Microsoft.VBPtrOffset) {
2804 Out << 'R' << AccessSpec;
2805 Mangler.mangleNumber(
2806 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VBPtrOffset));
2807 Mangler.mangleNumber(
2808 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VBOffsetOffset));
2809 Mangler.mangleNumber(
2810 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VtordispOffset));
2811 Mangler.mangleNumber(static_cast<uint32_t>(Adjustment.NonVirtual));
2814 Mangler.mangleNumber(
2815 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VtordispOffset));
2816 Mangler.mangleNumber(-static_cast<uint32_t>(Adjustment.NonVirtual));
2818 } else if (Adjustment.NonVirtual != 0) {
2819 switch (MD->getAccess()) {
2821 llvm_unreachable("Unsupported access specifier");
2831 Mangler.mangleNumber(-static_cast<uint32_t>(Adjustment.NonVirtual));
2833 switch (MD->getAccess()) {
2835 llvm_unreachable("Unsupported access specifier");
2848 void MicrosoftMangleContextImpl::mangleVirtualMemPtrThunk(
2849 const CXXMethodDecl *MD, const MethodVFTableLocation &ML,
2851 msvc_hashing_ostream MHO(Out);
2852 MicrosoftCXXNameMangler Mangler(*this, MHO);
2853 Mangler.getStream() << '?';
2854 Mangler.mangleVirtualMemPtrThunk(MD, ML);
2857 void MicrosoftMangleContextImpl::mangleThunk(const CXXMethodDecl *MD,
2858 const ThunkInfo &Thunk,
2860 msvc_hashing_ostream MHO(Out);
2861 MicrosoftCXXNameMangler Mangler(*this, MHO);
2862 Mangler.getStream() << '?';
2863 Mangler.mangleName(MD);
2864 mangleThunkThisAdjustment(MD, Thunk.This, Mangler, MHO);
2865 if (!Thunk.Return.isEmpty())
2866 assert(Thunk.Method != nullptr &&
2867 "Thunk info should hold the overridee decl");
2869 const CXXMethodDecl *DeclForFPT = Thunk.Method ? Thunk.Method : MD;
2870 Mangler.mangleFunctionType(
2871 DeclForFPT->getType()->castAs<FunctionProtoType>(), MD);
2874 void MicrosoftMangleContextImpl::mangleCXXDtorThunk(
2875 const CXXDestructorDecl *DD, CXXDtorType Type,
2876 const ThisAdjustment &Adjustment, raw_ostream &Out) {
2877 // FIXME: Actually, the dtor thunk should be emitted for vector deleting
2878 // dtors rather than scalar deleting dtors. Just use the vector deleting dtor
2879 // mangling manually until we support both deleting dtor types.
2880 assert(Type == Dtor_Deleting);
2881 msvc_hashing_ostream MHO(Out);
2882 MicrosoftCXXNameMangler Mangler(*this, MHO, DD, Type);
2883 Mangler.getStream() << "??_E";
2884 Mangler.mangleName(DD->getParent());
2885 mangleThunkThisAdjustment(DD, Adjustment, Mangler, MHO);
2886 Mangler.mangleFunctionType(DD->getType()->castAs<FunctionProtoType>(), DD);
2889 void MicrosoftMangleContextImpl::mangleCXXVFTable(
2890 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
2892 // <mangled-name> ::= ?_7 <class-name> <storage-class>
2893 // <cvr-qualifiers> [<name>] @
2894 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
2895 // is always '6' for vftables.
2896 msvc_hashing_ostream MHO(Out);
2897 MicrosoftCXXNameMangler Mangler(*this, MHO);
2898 if (Derived->hasAttr<DLLImportAttr>())
2899 Mangler.getStream() << "??_S";
2901 Mangler.getStream() << "??_7";
2902 Mangler.mangleName(Derived);
2903 Mangler.getStream() << "6B"; // '6' for vftable, 'B' for const.
2904 for (const CXXRecordDecl *RD : BasePath)
2905 Mangler.mangleName(RD);
2906 Mangler.getStream() << '@';
2909 void MicrosoftMangleContextImpl::mangleCXXVBTable(
2910 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
2912 // <mangled-name> ::= ?_8 <class-name> <storage-class>
2913 // <cvr-qualifiers> [<name>] @
2914 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
2915 // is always '7' for vbtables.
2916 msvc_hashing_ostream MHO(Out);
2917 MicrosoftCXXNameMangler Mangler(*this, MHO);
2918 Mangler.getStream() << "??_8";
2919 Mangler.mangleName(Derived);
2920 Mangler.getStream() << "7B"; // '7' for vbtable, 'B' for const.
2921 for (const CXXRecordDecl *RD : BasePath)
2922 Mangler.mangleName(RD);
2923 Mangler.getStream() << '@';
2926 void MicrosoftMangleContextImpl::mangleCXXRTTI(QualType T, raw_ostream &Out) {
2927 msvc_hashing_ostream MHO(Out);
2928 MicrosoftCXXNameMangler Mangler(*this, MHO);
2929 Mangler.getStream() << "??_R0";
2930 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
2931 Mangler.getStream() << "@8";
2934 void MicrosoftMangleContextImpl::mangleCXXRTTIName(QualType T,
2936 MicrosoftCXXNameMangler Mangler(*this, Out);
2937 Mangler.getStream() << '.';
2938 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
2941 void MicrosoftMangleContextImpl::mangleCXXVirtualDisplacementMap(
2942 const CXXRecordDecl *SrcRD, const CXXRecordDecl *DstRD, raw_ostream &Out) {
2943 msvc_hashing_ostream MHO(Out);
2944 MicrosoftCXXNameMangler Mangler(*this, MHO);
2945 Mangler.getStream() << "??_K";
2946 Mangler.mangleName(SrcRD);
2947 Mangler.getStream() << "$C";
2948 Mangler.mangleName(DstRD);
2951 void MicrosoftMangleContextImpl::mangleCXXThrowInfo(QualType T, bool IsConst,
2954 uint32_t NumEntries,
2956 msvc_hashing_ostream MHO(Out);
2957 MicrosoftCXXNameMangler Mangler(*this, MHO);
2958 Mangler.getStream() << "_TI";
2960 Mangler.getStream() << 'C';
2962 Mangler.getStream() << 'V';
2964 Mangler.getStream() << 'U';
2965 Mangler.getStream() << NumEntries;
2966 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
2969 void MicrosoftMangleContextImpl::mangleCXXCatchableTypeArray(
2970 QualType T, uint32_t NumEntries, raw_ostream &Out) {
2971 msvc_hashing_ostream MHO(Out);
2972 MicrosoftCXXNameMangler Mangler(*this, MHO);
2973 Mangler.getStream() << "_CTA";
2974 Mangler.getStream() << NumEntries;
2975 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
2978 void MicrosoftMangleContextImpl::mangleCXXCatchableType(
2979 QualType T, const CXXConstructorDecl *CD, CXXCtorType CT, uint32_t Size,
2980 uint32_t NVOffset, int32_t VBPtrOffset, uint32_t VBIndex,
2982 MicrosoftCXXNameMangler Mangler(*this, Out);
2983 Mangler.getStream() << "_CT";
2985 llvm::SmallString<64> RTTIMangling;
2987 llvm::raw_svector_ostream Stream(RTTIMangling);
2988 msvc_hashing_ostream MHO(Stream);
2989 mangleCXXRTTI(T, MHO);
2991 Mangler.getStream() << RTTIMangling;
2993 // VS2015 CTP6 omits the copy-constructor in the mangled name. This name is,
2994 // in fact, superfluous but I'm not sure the change was made consciously.
2995 llvm::SmallString<64> CopyCtorMangling;
2996 if (!getASTContext().getLangOpts().isCompatibleWithMSVC(
2997 LangOptions::MSVC2015) &&
2999 llvm::raw_svector_ostream Stream(CopyCtorMangling);
3000 msvc_hashing_ostream MHO(Stream);
3001 mangleCXXCtor(CD, CT, MHO);
3003 Mangler.getStream() << CopyCtorMangling;
3005 Mangler.getStream() << Size;
3006 if (VBPtrOffset == -1) {
3008 Mangler.getStream() << NVOffset;
3011 Mangler.getStream() << NVOffset;
3012 Mangler.getStream() << VBPtrOffset;
3013 Mangler.getStream() << VBIndex;
3017 void MicrosoftMangleContextImpl::mangleCXXRTTIBaseClassDescriptor(
3018 const CXXRecordDecl *Derived, uint32_t NVOffset, int32_t VBPtrOffset,
3019 uint32_t VBTableOffset, uint32_t Flags, raw_ostream &Out) {
3020 msvc_hashing_ostream MHO(Out);
3021 MicrosoftCXXNameMangler Mangler(*this, MHO);
3022 Mangler.getStream() << "??_R1";
3023 Mangler.mangleNumber(NVOffset);
3024 Mangler.mangleNumber(VBPtrOffset);
3025 Mangler.mangleNumber(VBTableOffset);
3026 Mangler.mangleNumber(Flags);
3027 Mangler.mangleName(Derived);
3028 Mangler.getStream() << "8";
3031 void MicrosoftMangleContextImpl::mangleCXXRTTIBaseClassArray(
3032 const CXXRecordDecl *Derived, raw_ostream &Out) {
3033 msvc_hashing_ostream MHO(Out);
3034 MicrosoftCXXNameMangler Mangler(*this, MHO);
3035 Mangler.getStream() << "??_R2";
3036 Mangler.mangleName(Derived);
3037 Mangler.getStream() << "8";
3040 void MicrosoftMangleContextImpl::mangleCXXRTTIClassHierarchyDescriptor(
3041 const CXXRecordDecl *Derived, raw_ostream &Out) {
3042 msvc_hashing_ostream MHO(Out);
3043 MicrosoftCXXNameMangler Mangler(*this, MHO);
3044 Mangler.getStream() << "??_R3";
3045 Mangler.mangleName(Derived);
3046 Mangler.getStream() << "8";
3049 void MicrosoftMangleContextImpl::mangleCXXRTTICompleteObjectLocator(
3050 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
3052 // <mangled-name> ::= ?_R4 <class-name> <storage-class>
3053 // <cvr-qualifiers> [<name>] @
3054 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
3055 // is always '6' for vftables.
3056 llvm::SmallString<64> VFTableMangling;
3057 llvm::raw_svector_ostream Stream(VFTableMangling);
3058 mangleCXXVFTable(Derived, BasePath, Stream);
3060 if (VFTableMangling.startswith("??@")) {
3061 assert(VFTableMangling.endswith("@"));
3062 Out << VFTableMangling << "??_R4@";
3066 assert(VFTableMangling.startswith("??_7") ||
3067 VFTableMangling.startswith("??_S"));
3069 Out << "??_R4" << StringRef(VFTableMangling).drop_front(4);
3072 void MicrosoftMangleContextImpl::mangleSEHFilterExpression(
3073 const NamedDecl *EnclosingDecl, raw_ostream &Out) {
3074 msvc_hashing_ostream MHO(Out);
3075 MicrosoftCXXNameMangler Mangler(*this, MHO);
3076 // The function body is in the same comdat as the function with the handler,
3077 // so the numbering here doesn't have to be the same across TUs.
3079 // <mangled-name> ::= ?filt$ <filter-number> @0
3080 Mangler.getStream() << "?filt$" << SEHFilterIds[EnclosingDecl]++ << "@0@";
3081 Mangler.mangleName(EnclosingDecl);
3084 void MicrosoftMangleContextImpl::mangleSEHFinallyBlock(
3085 const NamedDecl *EnclosingDecl, raw_ostream &Out) {
3086 msvc_hashing_ostream MHO(Out);
3087 MicrosoftCXXNameMangler Mangler(*this, MHO);
3088 // The function body is in the same comdat as the function with the handler,
3089 // so the numbering here doesn't have to be the same across TUs.
3091 // <mangled-name> ::= ?fin$ <filter-number> @0
3092 Mangler.getStream() << "?fin$" << SEHFinallyIds[EnclosingDecl]++ << "@0@";
3093 Mangler.mangleName(EnclosingDecl);
3096 void MicrosoftMangleContextImpl::mangleTypeName(QualType T, raw_ostream &Out) {
3097 // This is just a made up unique string for the purposes of tbaa. undname
3098 // does *not* know how to demangle it.
3099 MicrosoftCXXNameMangler Mangler(*this, Out);
3100 Mangler.getStream() << '?';
3101 Mangler.mangleType(T, SourceRange());
3104 void MicrosoftMangleContextImpl::mangleCXXCtor(const CXXConstructorDecl *D,
3107 msvc_hashing_ostream MHO(Out);
3108 MicrosoftCXXNameMangler mangler(*this, MHO, D, Type);
3112 void MicrosoftMangleContextImpl::mangleCXXDtor(const CXXDestructorDecl *D,
3115 msvc_hashing_ostream MHO(Out);
3116 MicrosoftCXXNameMangler mangler(*this, MHO, D, Type);
3120 void MicrosoftMangleContextImpl::mangleReferenceTemporary(
3121 const VarDecl *VD, unsigned ManglingNumber, raw_ostream &Out) {
3122 msvc_hashing_ostream MHO(Out);
3123 MicrosoftCXXNameMangler Mangler(*this, MHO);
3125 Mangler.getStream() << "?$RT" << ManglingNumber << '@';
3126 Mangler.mangle(VD, "");
3129 void MicrosoftMangleContextImpl::mangleThreadSafeStaticGuardVariable(
3130 const VarDecl *VD, unsigned GuardNum, raw_ostream &Out) {
3131 msvc_hashing_ostream MHO(Out);
3132 MicrosoftCXXNameMangler Mangler(*this, MHO);
3134 Mangler.getStream() << "?$TSS" << GuardNum << '@';
3135 Mangler.mangleNestedName(VD);
3136 Mangler.getStream() << "@4HA";
3139 void MicrosoftMangleContextImpl::mangleStaticGuardVariable(const VarDecl *VD,
3141 // <guard-name> ::= ?_B <postfix> @5 <scope-depth>
3142 // ::= ?__J <postfix> @5 <scope-depth>
3143 // ::= ?$S <guard-num> @ <postfix> @4IA
3145 // The first mangling is what MSVC uses to guard static locals in inline
3146 // functions. It uses a different mangling in external functions to support
3147 // guarding more than 32 variables. MSVC rejects inline functions with more
3148 // than 32 static locals. We don't fully implement the second mangling
3149 // because those guards are not externally visible, and instead use LLVM's
3150 // default renaming when creating a new guard variable.
3151 msvc_hashing_ostream MHO(Out);
3152 MicrosoftCXXNameMangler Mangler(*this, MHO);
3154 bool Visible = VD->isExternallyVisible();
3156 Mangler.getStream() << (VD->getTLSKind() ? "??__J" : "??_B");
3158 Mangler.getStream() << "?$S1@";
3160 unsigned ScopeDepth = 0;
3161 if (Visible && !getNextDiscriminator(VD, ScopeDepth))
3162 // If we do not have a discriminator and are emitting a guard variable for
3163 // use at global scope, then mangling the nested name will not be enough to
3164 // remove ambiguities.
3165 Mangler.mangle(VD, "");
3167 Mangler.mangleNestedName(VD);
3168 Mangler.getStream() << (Visible ? "@5" : "@4IA");
3170 Mangler.mangleNumber(ScopeDepth);
3173 void MicrosoftMangleContextImpl::mangleInitFiniStub(const VarDecl *D,
3176 msvc_hashing_ostream MHO(Out);
3177 MicrosoftCXXNameMangler Mangler(*this, MHO);
3178 Mangler.getStream() << "??__" << CharCode;
3179 Mangler.mangleName(D);
3180 if (D->isStaticDataMember()) {
3181 Mangler.mangleVariableEncoding(D);
3182 Mangler.getStream() << '@';
3184 // This is the function class mangling. These stubs are global, non-variadic,
3185 // cdecl functions that return void and take no args.
3186 Mangler.getStream() << "YAXXZ";
3189 void MicrosoftMangleContextImpl::mangleDynamicInitializer(const VarDecl *D,
3191 // <initializer-name> ::= ?__E <name> YAXXZ
3192 mangleInitFiniStub(D, 'E', Out);
3196 MicrosoftMangleContextImpl::mangleDynamicAtExitDestructor(const VarDecl *D,
3198 // <destructor-name> ::= ?__F <name> YAXXZ
3199 mangleInitFiniStub(D, 'F', Out);
3202 void MicrosoftMangleContextImpl::mangleStringLiteral(const StringLiteral *SL,
3204 // <char-type> ::= 0 # char, char16_t, char32_t
3205 // # (little endian char data in mangling)
3206 // ::= 1 # wchar_t (big endian char data in mangling)
3208 // <literal-length> ::= <non-negative integer> # the length of the literal
3210 // <encoded-crc> ::= <hex digit>+ @ # crc of the literal including
3211 // # trailing null bytes
3213 // <encoded-string> ::= <simple character> # uninteresting character
3214 // ::= '?$' <hex digit> <hex digit> # these two nibbles
3215 // # encode the byte for the
3217 // ::= '?' [a-z] # \xe1 - \xfa
3218 // ::= '?' [A-Z] # \xc1 - \xda
3219 // ::= '?' [0-9] # [,/\:. \n\t'-]
3221 // <literal> ::= '??_C@_' <char-type> <literal-length> <encoded-crc>
3222 // <encoded-string> '@'
3223 MicrosoftCXXNameMangler Mangler(*this, Out);
3224 Mangler.getStream() << "??_C@_";
3226 // The actual string length might be different from that of the string literal
3228 // char foo[3] = "foobar";
3229 // char bar[42] = "foobar";
3230 // Where it is truncated or zero-padded to fit the array. This is the length
3231 // used for mangling, and any trailing null-bytes also need to be mangled.
3232 unsigned StringLength = getASTContext()
3233 .getAsConstantArrayType(SL->getType())
3236 unsigned StringByteLength = StringLength * SL->getCharByteWidth();
3238 // <char-type>: The "kind" of string literal is encoded into the mangled name.
3240 Mangler.getStream() << '1';
3242 Mangler.getStream() << '0';
3244 // <literal-length>: The next part of the mangled name consists of the length
3245 // of the string in bytes.
3246 Mangler.mangleNumber(StringByteLength);
3248 auto GetLittleEndianByte = [&SL](unsigned Index) {
3249 unsigned CharByteWidth = SL->getCharByteWidth();
3250 if (Index / CharByteWidth >= SL->getLength())
3251 return static_cast<char>(0);
3252 uint32_t CodeUnit = SL->getCodeUnit(Index / CharByteWidth);
3253 unsigned OffsetInCodeUnit = Index % CharByteWidth;
3254 return static_cast<char>((CodeUnit >> (8 * OffsetInCodeUnit)) & 0xff);
3257 auto GetBigEndianByte = [&SL](unsigned Index) {
3258 unsigned CharByteWidth = SL->getCharByteWidth();
3259 if (Index / CharByteWidth >= SL->getLength())
3260 return static_cast<char>(0);
3261 uint32_t CodeUnit = SL->getCodeUnit(Index / CharByteWidth);
3262 unsigned OffsetInCodeUnit = (CharByteWidth - 1) - (Index % CharByteWidth);
3263 return static_cast<char>((CodeUnit >> (8 * OffsetInCodeUnit)) & 0xff);
3266 // CRC all the bytes of the StringLiteral.
3268 for (unsigned I = 0, E = StringByteLength; I != E; ++I)
3269 JC.update(GetLittleEndianByte(I));
3271 // <encoded-crc>: The CRC is encoded utilizing the standard number mangling
3273 Mangler.mangleNumber(JC.getCRC());
3275 // <encoded-string>: The mangled name also contains the first 32 bytes
3276 // (including null-terminator bytes) of the encoded StringLiteral.
3277 // Each character is encoded by splitting them into bytes and then encoding
3278 // the constituent bytes.
3279 auto MangleByte = [&Mangler](char Byte) {
3280 // There are five different manglings for characters:
3281 // - [a-zA-Z0-9_$]: A one-to-one mapping.
3282 // - ?[a-z]: The range from \xe1 to \xfa.
3283 // - ?[A-Z]: The range from \xc1 to \xda.
3284 // - ?[0-9]: The set of [,/\:. \n\t'-].
3285 // - ?$XX: A fallback which maps nibbles.
3286 if (isIdentifierBody(Byte, /*AllowDollar=*/true)) {
3287 Mangler.getStream() << Byte;
3288 } else if (isLetter(Byte & 0x7f)) {
3289 Mangler.getStream() << '?' << static_cast<char>(Byte & 0x7f);
3291 const char SpecialChars[] = {',', '/', '\\', ':', '.',
3292 ' ', '\n', '\t', '\'', '-'};
3294 std::find(std::begin(SpecialChars), std::end(SpecialChars), Byte);
3295 if (Pos != std::end(SpecialChars)) {
3296 Mangler.getStream() << '?' << (Pos - std::begin(SpecialChars));
3298 Mangler.getStream() << "?$";
3299 Mangler.getStream() << static_cast<char>('A' + ((Byte >> 4) & 0xf));
3300 Mangler.getStream() << static_cast<char>('A' + (Byte & 0xf));
3305 // Enforce our 32 bytes max, except wchar_t which gets 32 chars instead.
3306 unsigned MaxBytesToMangle = SL->isWide() ? 64U : 32U;
3307 unsigned NumBytesToMangle = std::min(MaxBytesToMangle, StringByteLength);
3308 for (unsigned I = 0; I != NumBytesToMangle; ++I) {
3310 MangleByte(GetBigEndianByte(I));
3312 MangleByte(GetLittleEndianByte(I));
3315 Mangler.getStream() << '@';
3318 MicrosoftMangleContext *
3319 MicrosoftMangleContext::create(ASTContext &Context, DiagnosticsEngine &Diags) {
3320 return new MicrosoftMangleContextImpl(Context, Diags);