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 /// \brief 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 raw_ostream &) override;
139 void mangleThunk(const CXXMethodDecl *MD, const ThunkInfo &Thunk,
140 raw_ostream &) override;
141 void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type,
142 const ThisAdjustment &ThisAdjustment,
143 raw_ostream &) override;
144 void mangleCXXVFTable(const CXXRecordDecl *Derived,
145 ArrayRef<const CXXRecordDecl *> BasePath,
146 raw_ostream &Out) override;
147 void mangleCXXVBTable(const CXXRecordDecl *Derived,
148 ArrayRef<const CXXRecordDecl *> BasePath,
149 raw_ostream &Out) override;
150 void mangleCXXVirtualDisplacementMap(const CXXRecordDecl *SrcRD,
151 const CXXRecordDecl *DstRD,
152 raw_ostream &Out) override;
153 void mangleCXXThrowInfo(QualType T, bool IsConst, bool IsVolatile,
154 bool IsUnaligned, uint32_t NumEntries,
155 raw_ostream &Out) override;
156 void mangleCXXCatchableTypeArray(QualType T, uint32_t NumEntries,
157 raw_ostream &Out) override;
158 void mangleCXXCatchableType(QualType T, const CXXConstructorDecl *CD,
159 CXXCtorType CT, uint32_t Size, uint32_t NVOffset,
160 int32_t VBPtrOffset, uint32_t VBIndex,
161 raw_ostream &Out) override;
162 void mangleCXXRTTI(QualType T, raw_ostream &Out) override;
163 void mangleCXXRTTIName(QualType T, raw_ostream &Out) override;
164 void mangleCXXRTTIBaseClassDescriptor(const CXXRecordDecl *Derived,
165 uint32_t NVOffset, int32_t VBPtrOffset,
166 uint32_t VBTableOffset, uint32_t Flags,
167 raw_ostream &Out) override;
168 void mangleCXXRTTIBaseClassArray(const CXXRecordDecl *Derived,
169 raw_ostream &Out) override;
170 void mangleCXXRTTIClassHierarchyDescriptor(const CXXRecordDecl *Derived,
171 raw_ostream &Out) override;
173 mangleCXXRTTICompleteObjectLocator(const CXXRecordDecl *Derived,
174 ArrayRef<const CXXRecordDecl *> BasePath,
175 raw_ostream &Out) override;
176 void mangleTypeName(QualType T, raw_ostream &) override;
177 void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type,
178 raw_ostream &) override;
179 void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type,
180 raw_ostream &) override;
181 void mangleReferenceTemporary(const VarDecl *, unsigned ManglingNumber,
182 raw_ostream &) override;
183 void mangleStaticGuardVariable(const VarDecl *D, raw_ostream &Out) override;
184 void mangleThreadSafeStaticGuardVariable(const VarDecl *D, unsigned GuardNum,
185 raw_ostream &Out) override;
186 void mangleDynamicInitializer(const VarDecl *D, raw_ostream &Out) override;
187 void mangleDynamicAtExitDestructor(const VarDecl *D,
188 raw_ostream &Out) override;
189 void mangleSEHFilterExpression(const NamedDecl *EnclosingDecl,
190 raw_ostream &Out) override;
191 void mangleSEHFinallyBlock(const NamedDecl *EnclosingDecl,
192 raw_ostream &Out) override;
193 void mangleStringLiteral(const StringLiteral *SL, raw_ostream &Out) override;
194 bool getNextDiscriminator(const NamedDecl *ND, unsigned &disc) {
195 const DeclContext *DC = getEffectiveDeclContext(ND);
196 if (!DC->isFunctionOrMethod())
199 // Lambda closure types are already numbered, give out a phony number so
200 // that they demangle nicely.
201 if (const auto *RD = dyn_cast<CXXRecordDecl>(ND)) {
202 if (RD->isLambda()) {
208 // Use the canonical number for externally visible decls.
209 if (ND->isExternallyVisible()) {
210 disc = getASTContext().getManglingNumber(ND);
214 // Anonymous tags are already numbered.
215 if (const TagDecl *Tag = dyn_cast<TagDecl>(ND)) {
216 if (!Tag->hasNameForLinkage() &&
217 !getASTContext().getDeclaratorForUnnamedTagDecl(Tag) &&
218 !getASTContext().getTypedefNameForUnnamedTagDecl(Tag))
222 // Make up a reasonable number for internal decls.
223 unsigned &discriminator = Uniquifier[ND];
225 discriminator = ++Discriminator[std::make_pair(DC, ND->getIdentifier())];
226 disc = discriminator + 1;
230 unsigned getLambdaId(const CXXRecordDecl *RD) {
231 assert(RD->isLambda() && "RD must be a lambda!");
232 assert(!RD->isExternallyVisible() && "RD must not be visible!");
233 assert(RD->getLambdaManglingNumber() == 0 &&
234 "RD must not have a mangling number!");
235 std::pair<llvm::DenseMap<const CXXRecordDecl *, unsigned>::iterator, bool>
236 Result = LambdaIds.insert(std::make_pair(RD, LambdaIds.size()));
237 return Result.first->second;
241 void mangleInitFiniStub(const VarDecl *D, char CharCode, raw_ostream &Out);
244 /// MicrosoftCXXNameMangler - Manage the mangling of a single name for the
245 /// Microsoft Visual C++ ABI.
246 class MicrosoftCXXNameMangler {
247 MicrosoftMangleContextImpl &Context;
250 /// The "structor" is the top-level declaration being mangled, if
251 /// that's not a template specialization; otherwise it's the pattern
252 /// for that specialization.
253 const NamedDecl *Structor;
254 unsigned StructorType;
256 typedef llvm::SmallVector<std::string, 10> BackRefVec;
257 BackRefVec NameBackReferences;
259 typedef llvm::DenseMap<const void *, unsigned> ArgBackRefMap;
260 ArgBackRefMap TypeBackReferences;
262 typedef std::set<int> PassObjectSizeArgsSet;
263 PassObjectSizeArgsSet PassObjectSizeArgs;
265 ASTContext &getASTContext() const { return Context.getASTContext(); }
267 // FIXME: If we add support for __ptr32/64 qualifiers, then we should push
268 // this check into mangleQualifiers().
269 const bool PointersAre64Bit;
272 enum QualifierMangleMode { QMM_Drop, QMM_Mangle, QMM_Escape, QMM_Result };
274 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_)
275 : Context(C), Out(Out_), Structor(nullptr), StructorType(-1),
276 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
279 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_,
280 const CXXConstructorDecl *D, CXXCtorType Type)
281 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
282 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
285 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_,
286 const CXXDestructorDecl *D, CXXDtorType Type)
287 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
288 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
291 raw_ostream &getStream() const { return Out; }
293 void mangle(const NamedDecl *D, StringRef Prefix = "\01?");
294 void mangleName(const NamedDecl *ND);
295 void mangleFunctionEncoding(const FunctionDecl *FD, bool ShouldMangle);
296 void mangleVariableEncoding(const VarDecl *VD);
297 void mangleMemberDataPointer(const CXXRecordDecl *RD, const ValueDecl *VD);
298 void mangleMemberFunctionPointer(const CXXRecordDecl *RD,
299 const CXXMethodDecl *MD);
300 void mangleVirtualMemPtrThunk(
301 const CXXMethodDecl *MD,
302 const MicrosoftVTableContext::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 // Declare manglers for every type class.
341 #define ABSTRACT_TYPE(CLASS, PARENT)
342 #define NON_CANONICAL_TYPE(CLASS, PARENT)
343 #define TYPE(CLASS, PARENT) void mangleType(const CLASS##Type *T, \
346 #include "clang/AST/TypeNodes.def"
348 #undef NON_CANONICAL_TYPE
351 void mangleType(const TagDecl *TD);
352 void mangleDecayedArrayType(const ArrayType *T);
353 void mangleArrayType(const ArrayType *T);
354 void mangleFunctionClass(const FunctionDecl *FD);
355 void mangleCallingConvention(CallingConv CC);
356 void mangleCallingConvention(const FunctionType *T);
357 void mangleIntegerLiteral(const llvm::APSInt &Number, bool IsBoolean);
358 void mangleExpression(const Expr *E);
359 void mangleThrowSpecification(const FunctionProtoType *T);
361 void mangleTemplateArgs(const TemplateDecl *TD,
362 const TemplateArgumentList &TemplateArgs);
363 void mangleTemplateArg(const TemplateDecl *TD, const TemplateArgument &TA,
364 const NamedDecl *Parm);
368 bool MicrosoftMangleContextImpl::shouldMangleCXXName(const NamedDecl *D) {
369 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
370 LanguageLinkage L = FD->getLanguageLinkage();
371 // Overloadable functions need mangling.
372 if (FD->hasAttr<OverloadableAttr>())
375 // The ABI expects that we would never mangle "typical" user-defined entry
376 // points regardless of visibility or freestanding-ness.
378 // N.B. This is distinct from asking about "main". "main" has a lot of
379 // special rules associated with it in the standard while these
380 // user-defined entry points are outside of the purview of the standard.
381 // For example, there can be only one definition for "main" in a standards
382 // compliant program; however nothing forbids the existence of wmain and
383 // WinMain in the same translation unit.
384 if (FD->isMSVCRTEntryPoint())
387 // C++ functions and those whose names are not a simple identifier need
389 if (!FD->getDeclName().isIdentifier() || L == CXXLanguageLinkage)
392 // C functions are not mangled.
393 if (L == CLanguageLinkage)
397 // Otherwise, no mangling is done outside C++ mode.
398 if (!getASTContext().getLangOpts().CPlusPlus)
401 const VarDecl *VD = dyn_cast<VarDecl>(D);
402 if (VD && !isa<DecompositionDecl>(D)) {
403 // C variables are not mangled.
407 // Variables at global scope with non-internal linkage are not mangled.
408 const DeclContext *DC = getEffectiveDeclContext(D);
409 // Check for extern variable declared locally.
410 if (DC->isFunctionOrMethod() && D->hasLinkage())
411 while (!DC->isNamespace() && !DC->isTranslationUnit())
412 DC = getEffectiveParentContext(DC);
414 if (DC->isTranslationUnit() && D->getFormalLinkage() == InternalLinkage &&
415 !isa<VarTemplateSpecializationDecl>(D) &&
416 D->getIdentifier() != nullptr)
424 MicrosoftMangleContextImpl::shouldMangleStringLiteral(const StringLiteral *SL) {
428 void MicrosoftCXXNameMangler::mangle(const NamedDecl *D, StringRef Prefix) {
429 // MSVC doesn't mangle C++ names the same way it mangles extern "C" names.
430 // Therefore it's really important that we don't decorate the
431 // name with leading underscores or leading/trailing at signs. So, by
432 // default, we emit an asm marker at the start so we get the name right.
433 // Callers can override this with a custom prefix.
435 // <mangled-name> ::= ? <name> <type-encoding>
438 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
439 mangleFunctionEncoding(FD, Context.shouldMangleDeclName(FD));
440 else if (const VarDecl *VD = dyn_cast<VarDecl>(D))
441 mangleVariableEncoding(VD);
443 llvm_unreachable("Tried to mangle unexpected NamedDecl!");
446 void MicrosoftCXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD,
448 // <type-encoding> ::= <function-class> <function-type>
450 // Since MSVC operates on the type as written and not the canonical type, it
451 // actually matters which decl we have here. MSVC appears to choose the
452 // first, since it is most likely to be the declaration in a header file.
453 FD = FD->getFirstDecl();
455 // We should never ever see a FunctionNoProtoType at this point.
456 // We don't even know how to mangle their types anyway :).
457 const FunctionProtoType *FT = FD->getType()->castAs<FunctionProtoType>();
459 // extern "C" functions can hold entities that must be mangled.
460 // As it stands, these functions still need to get expressed in the full
461 // external name. They have their class and type omitted, replaced with '9'.
463 // We would like to mangle all extern "C" functions using this additional
464 // component but this would break compatibility with MSVC's behavior.
465 // Instead, do this when we know that compatibility isn't important (in
466 // other words, when it is an overloaded extern "C" function).
467 if (FD->isExternC() && FD->hasAttr<OverloadableAttr>())
470 mangleFunctionClass(FD);
472 mangleFunctionType(FT, FD);
478 void MicrosoftCXXNameMangler::mangleVariableEncoding(const VarDecl *VD) {
479 // <type-encoding> ::= <storage-class> <variable-type>
480 // <storage-class> ::= 0 # private static member
481 // ::= 1 # protected static member
482 // ::= 2 # public static member
484 // ::= 4 # static local
486 // The first character in the encoding (after the name) is the storage class.
487 if (VD->isStaticDataMember()) {
488 // If it's a static member, it also encodes the access level.
489 switch (VD->getAccess()) {
491 case AS_private: Out << '0'; break;
492 case AS_protected: Out << '1'; break;
493 case AS_public: Out << '2'; break;
496 else if (!VD->isStaticLocal())
500 // Now mangle the type.
501 // <variable-type> ::= <type> <cvr-qualifiers>
502 // ::= <type> <pointee-cvr-qualifiers> # pointers, references
503 // Pointers and references are odd. The type of 'int * const foo;' gets
504 // mangled as 'QAHA' instead of 'PAHB', for example.
505 SourceRange SR = VD->getSourceRange();
506 QualType Ty = VD->getType();
507 if (Ty->isPointerType() || Ty->isReferenceType() ||
508 Ty->isMemberPointerType()) {
509 mangleType(Ty, SR, QMM_Drop);
510 manglePointerExtQualifiers(
511 Ty.getDesugaredType(getASTContext()).getLocalQualifiers(), QualType());
512 if (const MemberPointerType *MPT = Ty->getAs<MemberPointerType>()) {
513 mangleQualifiers(MPT->getPointeeType().getQualifiers(), true);
514 // Member pointers are suffixed with a back reference to the member
515 // pointer's class name.
516 mangleName(MPT->getClass()->getAsCXXRecordDecl());
518 mangleQualifiers(Ty->getPointeeType().getQualifiers(), false);
519 } else if (const ArrayType *AT = getASTContext().getAsArrayType(Ty)) {
520 // Global arrays are funny, too.
521 mangleDecayedArrayType(AT);
522 if (AT->getElementType()->isArrayType())
525 mangleQualifiers(Ty.getQualifiers(), false);
527 mangleType(Ty, SR, QMM_Drop);
528 mangleQualifiers(Ty.getQualifiers(), false);
532 void MicrosoftCXXNameMangler::mangleMemberDataPointer(const CXXRecordDecl *RD,
533 const ValueDecl *VD) {
534 // <member-data-pointer> ::= <integer-literal>
535 // ::= $F <number> <number>
536 // ::= $G <number> <number> <number>
539 int64_t VBTableOffset;
540 MSInheritanceAttr::Spelling IM = RD->getMSInheritanceModel();
542 FieldOffset = getASTContext().getFieldOffset(VD);
543 assert(FieldOffset % getASTContext().getCharWidth() == 0 &&
544 "cannot take address of bitfield");
545 FieldOffset /= getASTContext().getCharWidth();
549 if (IM == MSInheritanceAttr::Keyword_virtual_inheritance)
550 FieldOffset -= getASTContext().getOffsetOfBaseWithVBPtr(RD).getQuantity();
552 FieldOffset = RD->nullFieldOffsetIsZero() ? 0 : -1;
559 case MSInheritanceAttr::Keyword_single_inheritance: Code = '0'; break;
560 case MSInheritanceAttr::Keyword_multiple_inheritance: Code = '0'; break;
561 case MSInheritanceAttr::Keyword_virtual_inheritance: Code = 'F'; break;
562 case MSInheritanceAttr::Keyword_unspecified_inheritance: Code = 'G'; break;
567 mangleNumber(FieldOffset);
569 // The C++ standard doesn't allow base-to-derived member pointer conversions
570 // in template parameter contexts, so the vbptr offset of data member pointers
572 if (MSInheritanceAttr::hasVBPtrOffsetField(IM))
574 if (MSInheritanceAttr::hasVBTableOffsetField(IM))
575 mangleNumber(VBTableOffset);
579 MicrosoftCXXNameMangler::mangleMemberFunctionPointer(const CXXRecordDecl *RD,
580 const CXXMethodDecl *MD) {
581 // <member-function-pointer> ::= $1? <name>
582 // ::= $H? <name> <number>
583 // ::= $I? <name> <number> <number>
584 // ::= $J? <name> <number> <number> <number>
586 MSInheritanceAttr::Spelling IM = RD->getMSInheritanceModel();
590 case MSInheritanceAttr::Keyword_single_inheritance: Code = '1'; break;
591 case MSInheritanceAttr::Keyword_multiple_inheritance: Code = 'H'; break;
592 case MSInheritanceAttr::Keyword_virtual_inheritance: Code = 'I'; break;
593 case MSInheritanceAttr::Keyword_unspecified_inheritance: Code = 'J'; break;
596 // If non-virtual, mangle the name. If virtual, mangle as a virtual memptr
598 uint64_t NVOffset = 0;
599 uint64_t VBTableOffset = 0;
600 uint64_t VBPtrOffset = 0;
602 Out << '$' << Code << '?';
603 if (MD->isVirtual()) {
604 MicrosoftVTableContext *VTContext =
605 cast<MicrosoftVTableContext>(getASTContext().getVTableContext());
606 const MicrosoftVTableContext::MethodVFTableLocation &ML =
607 VTContext->getMethodVFTableLocation(GlobalDecl(MD));
608 mangleVirtualMemPtrThunk(MD, ML);
609 NVOffset = ML.VFPtrOffset.getQuantity();
610 VBTableOffset = ML.VBTableIndex * 4;
612 const ASTRecordLayout &Layout = getASTContext().getASTRecordLayout(RD);
613 VBPtrOffset = Layout.getVBPtrOffset().getQuantity();
617 mangleFunctionEncoding(MD, /*ShouldMangle=*/true);
620 if (VBTableOffset == 0 &&
621 IM == MSInheritanceAttr::Keyword_virtual_inheritance)
622 NVOffset -= getASTContext().getOffsetOfBaseWithVBPtr(RD).getQuantity();
624 // Null single inheritance member functions are encoded as a simple nullptr.
625 if (IM == MSInheritanceAttr::Keyword_single_inheritance) {
629 if (IM == MSInheritanceAttr::Keyword_unspecified_inheritance)
634 if (MSInheritanceAttr::hasNVOffsetField(/*IsMemberFunction=*/true, IM))
635 mangleNumber(static_cast<uint32_t>(NVOffset));
636 if (MSInheritanceAttr::hasVBPtrOffsetField(IM))
637 mangleNumber(VBPtrOffset);
638 if (MSInheritanceAttr::hasVBTableOffsetField(IM))
639 mangleNumber(VBTableOffset);
642 void MicrosoftCXXNameMangler::mangleVirtualMemPtrThunk(
643 const CXXMethodDecl *MD,
644 const MicrosoftVTableContext::MethodVFTableLocation &ML) {
645 // Get the vftable offset.
646 CharUnits PointerWidth = getASTContext().toCharUnitsFromBits(
647 getASTContext().getTargetInfo().getPointerWidth(0));
648 uint64_t OffsetInVFTable = ML.Index * PointerWidth.getQuantity();
651 mangleName(MD->getParent());
653 mangleNumber(OffsetInVFTable);
655 mangleCallingConvention(MD->getType()->getAs<FunctionProtoType>());
658 void MicrosoftCXXNameMangler::mangleName(const NamedDecl *ND) {
659 // <name> ::= <unscoped-name> {[<named-scope>]+ | [<nested-name>]}? @
661 // Always start with the unqualified name.
662 mangleUnqualifiedName(ND);
664 mangleNestedName(ND);
666 // Terminate the whole name with an '@'.
670 void MicrosoftCXXNameMangler::mangleNumber(int64_t Number) {
671 // <non-negative integer> ::= A@ # when Number == 0
672 // ::= <decimal digit> # when 1 <= Number <= 10
673 // ::= <hex digit>+ @ # when Number >= 10
675 // <number> ::= [?] <non-negative integer>
677 uint64_t Value = static_cast<uint64_t>(Number);
685 else if (Value >= 1 && Value <= 10)
688 // Numbers that are not encoded as decimal digits are represented as nibbles
689 // in the range of ASCII characters 'A' to 'P'.
690 // The number 0x123450 would be encoded as 'BCDEFA'
691 char EncodedNumberBuffer[sizeof(uint64_t) * 2];
692 MutableArrayRef<char> BufferRef(EncodedNumberBuffer);
693 MutableArrayRef<char>::reverse_iterator I = BufferRef.rbegin();
694 for (; Value != 0; Value >>= 4)
695 *I++ = 'A' + (Value & 0xf);
696 Out.write(I.base(), I - BufferRef.rbegin());
701 static const TemplateDecl *
702 isTemplate(const NamedDecl *ND, const TemplateArgumentList *&TemplateArgs) {
703 // Check if we have a function template.
704 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
705 if (const TemplateDecl *TD = FD->getPrimaryTemplate()) {
706 TemplateArgs = FD->getTemplateSpecializationArgs();
711 // Check if we have a class template.
712 if (const ClassTemplateSpecializationDecl *Spec =
713 dyn_cast<ClassTemplateSpecializationDecl>(ND)) {
714 TemplateArgs = &Spec->getTemplateArgs();
715 return Spec->getSpecializedTemplate();
718 // Check if we have a variable template.
719 if (const VarTemplateSpecializationDecl *Spec =
720 dyn_cast<VarTemplateSpecializationDecl>(ND)) {
721 TemplateArgs = &Spec->getTemplateArgs();
722 return Spec->getSpecializedTemplate();
728 void MicrosoftCXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND,
729 DeclarationName Name) {
730 // <unqualified-name> ::= <operator-name>
731 // ::= <ctor-dtor-name>
733 // ::= <template-name>
735 // Check if we have a template.
736 const TemplateArgumentList *TemplateArgs = nullptr;
737 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) {
738 // Function templates aren't considered for name back referencing. This
739 // makes sense since function templates aren't likely to occur multiple
740 // times in a symbol.
741 if (isa<FunctionTemplateDecl>(TD)) {
742 mangleTemplateInstantiationName(TD, *TemplateArgs);
747 // Here comes the tricky thing: if we need to mangle something like
748 // void foo(A::X<Y>, B::X<Y>),
749 // the X<Y> part is aliased. However, if you need to mangle
750 // void foo(A::X<A::Y>, A::X<B::Y>),
751 // the A::X<> part is not aliased.
752 // That said, from the mangler's perspective we have a structure like this:
753 // namespace[s] -> type[ -> template-parameters]
754 // but from the Clang perspective we have
755 // type [ -> template-parameters]
757 // What we do is we create a new mangler, mangle the same type (without
758 // a namespace suffix) to a string using the extra mangler and then use
759 // the mangled type name as a key to check the mangling of different types
762 llvm::SmallString<64> TemplateMangling;
763 llvm::raw_svector_ostream Stream(TemplateMangling);
764 MicrosoftCXXNameMangler Extra(Context, Stream);
765 Extra.mangleTemplateInstantiationName(TD, *TemplateArgs);
767 mangleSourceName(TemplateMangling);
771 switch (Name.getNameKind()) {
772 case DeclarationName::Identifier: {
773 if (const IdentifierInfo *II = Name.getAsIdentifierInfo()) {
774 mangleSourceName(II->getName());
778 // Otherwise, an anonymous entity. We must have a declaration.
779 assert(ND && "mangling empty name without declaration");
781 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) {
782 if (NS->isAnonymousNamespace()) {
788 if (const DecompositionDecl *DD = dyn_cast<DecompositionDecl>(ND)) {
789 // FIXME: Invented mangling for decomposition declarations:
791 // where X,Y,Z are the names of the bindings.
792 llvm::SmallString<128> Name("[");
793 for (auto *BD : DD->bindings()) {
796 Name += BD->getDeclName().getAsIdentifierInfo()->getName();
799 mangleSourceName(Name);
803 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) {
804 // We must have an anonymous union or struct declaration.
805 const CXXRecordDecl *RD = VD->getType()->getAsCXXRecordDecl();
806 assert(RD && "expected variable decl to have a record type");
807 // Anonymous types with no tag or typedef get the name of their
808 // declarator mangled in. If they have no declarator, number them with
810 llvm::SmallString<64> Name("$S");
811 // Get a unique id for the anonymous struct.
812 Name += llvm::utostr(Context.getAnonymousStructId(RD) + 1);
813 mangleSourceName(Name.str());
817 // We must have an anonymous struct.
818 const TagDecl *TD = cast<TagDecl>(ND);
819 if (const TypedefNameDecl *D = TD->getTypedefNameForAnonDecl()) {
820 assert(TD->getDeclContext() == D->getDeclContext() &&
821 "Typedef should not be in another decl context!");
822 assert(D->getDeclName().getAsIdentifierInfo() &&
823 "Typedef was not named!");
824 mangleSourceName(D->getDeclName().getAsIdentifierInfo()->getName());
828 if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(TD)) {
829 if (Record->isLambda()) {
830 llvm::SmallString<10> Name("<lambda_");
832 Decl *LambdaContextDecl = Record->getLambdaContextDecl();
833 unsigned LambdaManglingNumber = Record->getLambdaManglingNumber();
835 const ParmVarDecl *Parm =
836 dyn_cast_or_null<ParmVarDecl>(LambdaContextDecl);
837 const FunctionDecl *Func =
838 Parm ? dyn_cast<FunctionDecl>(Parm->getDeclContext()) : nullptr;
841 unsigned DefaultArgNo =
842 Func->getNumParams() - Parm->getFunctionScopeIndex();
843 Name += llvm::utostr(DefaultArgNo);
847 if (LambdaManglingNumber)
848 LambdaId = LambdaManglingNumber;
850 LambdaId = Context.getLambdaId(Record);
852 Name += llvm::utostr(LambdaId);
855 mangleSourceName(Name);
857 // If the context of a closure type is an initializer for a class
858 // member (static or nonstatic), it is encoded in a qualified name.
859 if (LambdaManglingNumber && LambdaContextDecl) {
860 if ((isa<VarDecl>(LambdaContextDecl) ||
861 isa<FieldDecl>(LambdaContextDecl)) &&
862 LambdaContextDecl->getDeclContext()->isRecord()) {
863 mangleUnqualifiedName(cast<NamedDecl>(LambdaContextDecl));
870 llvm::SmallString<64> Name;
871 if (DeclaratorDecl *DD =
872 Context.getASTContext().getDeclaratorForUnnamedTagDecl(TD)) {
873 // Anonymous types without a name for linkage purposes have their
874 // declarator mangled in if they have one.
875 Name += "<unnamed-type-";
876 Name += DD->getName();
877 } else if (TypedefNameDecl *TND =
878 Context.getASTContext().getTypedefNameForUnnamedTagDecl(
880 // Anonymous types without a name for linkage purposes have their
881 // associate typedef mangled in if they have one.
882 Name += "<unnamed-type-";
883 Name += TND->getName();
884 } else if (auto *ED = dyn_cast<EnumDecl>(TD)) {
885 auto EnumeratorI = ED->enumerator_begin();
886 assert(EnumeratorI != ED->enumerator_end());
887 Name += "<unnamed-enum-";
888 Name += EnumeratorI->getName();
890 // Otherwise, number the types using a $S prefix.
891 Name += "<unnamed-type-$S";
892 Name += llvm::utostr(Context.getAnonymousStructId(TD) + 1);
895 mangleSourceName(Name.str());
899 case DeclarationName::ObjCZeroArgSelector:
900 case DeclarationName::ObjCOneArgSelector:
901 case DeclarationName::ObjCMultiArgSelector:
902 llvm_unreachable("Can't mangle Objective-C selector names here!");
904 case DeclarationName::CXXConstructorName:
905 if (isStructorDecl(ND)) {
906 if (StructorType == Ctor_CopyingClosure) {
910 if (StructorType == Ctor_DefaultClosure) {
918 case DeclarationName::CXXDestructorName:
919 if (isStructorDecl(ND))
920 // If the named decl is the C++ destructor we're mangling,
921 // use the type we were given.
922 mangleCXXDtorType(static_cast<CXXDtorType>(StructorType));
924 // Otherwise, use the base destructor name. This is relevant if a
925 // class with a destructor is declared within a destructor.
926 mangleCXXDtorType(Dtor_Base);
929 case DeclarationName::CXXConversionFunctionName:
930 // <operator-name> ::= ?B # (cast)
931 // The target type is encoded as the return type.
935 case DeclarationName::CXXOperatorName:
936 mangleOperatorName(Name.getCXXOverloadedOperator(), ND->getLocation());
939 case DeclarationName::CXXLiteralOperatorName: {
941 mangleSourceName(Name.getCXXLiteralIdentifier()->getName());
945 case DeclarationName::CXXDeductionGuideName:
946 llvm_unreachable("Can't mangle a deduction guide name!");
948 case DeclarationName::CXXUsingDirective:
949 llvm_unreachable("Can't mangle a using directive name!");
953 void MicrosoftCXXNameMangler::mangleNestedName(const NamedDecl *ND) {
954 // <postfix> ::= <unqualified-name> [<postfix>]
955 // ::= <substitution> [<postfix>]
956 const DeclContext *DC = getEffectiveDeclContext(ND);
958 while (!DC->isTranslationUnit()) {
959 if (isa<TagDecl>(ND) || isa<VarDecl>(ND)) {
961 if (Context.getNextDiscriminator(ND, Disc)) {
968 if (const BlockDecl *BD = dyn_cast<BlockDecl>(DC)) {
969 DiagnosticsEngine &Diags = Context.getDiags();
971 Diags.getCustomDiagID(DiagnosticsEngine::Error,
972 "cannot mangle a local inside this block yet");
973 Diags.Report(BD->getLocation(), DiagID);
975 // FIXME: This is completely, utterly, wrong; see ItaniumMangle
976 // for how this should be done.
977 Out << "__block_invoke" << Context.getBlockId(BD, false);
979 } else if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(DC)) {
980 mangleObjCMethodName(Method);
981 } else if (isa<NamedDecl>(DC)) {
982 ND = cast<NamedDecl>(DC);
983 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
987 mangleUnqualifiedName(ND);
988 // Lambdas in default arguments conceptually belong to the function the
989 // parameter corresponds to.
990 if (const auto *LDADC = getLambdaDefaultArgumentDeclContext(ND)) {
996 DC = DC->getParent();
1000 void MicrosoftCXXNameMangler::mangleCXXDtorType(CXXDtorType T) {
1001 // Microsoft uses the names on the case labels for these dtor variants. Clang
1002 // uses the Itanium terminology internally. Everything in this ABI delegates
1003 // towards the base dtor.
1005 // <operator-name> ::= ?1 # destructor
1006 case Dtor_Base: Out << "?1"; return;
1007 // <operator-name> ::= ?_D # vbase destructor
1008 case Dtor_Complete: Out << "?_D"; return;
1009 // <operator-name> ::= ?_G # scalar deleting destructor
1010 case Dtor_Deleting: Out << "?_G"; return;
1011 // <operator-name> ::= ?_E # vector deleting destructor
1012 // FIXME: Add a vector deleting dtor type. It goes in the vtable, so we need
1015 llvm_unreachable("not expecting a COMDAT");
1017 llvm_unreachable("Unsupported dtor type?");
1020 void MicrosoftCXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO,
1021 SourceLocation Loc) {
1025 // <operator-name> ::= ?2 # new
1026 case OO_New: Out << "?2"; break;
1027 // <operator-name> ::= ?3 # delete
1028 case OO_Delete: Out << "?3"; break;
1029 // <operator-name> ::= ?4 # =
1030 case OO_Equal: Out << "?4"; break;
1031 // <operator-name> ::= ?5 # >>
1032 case OO_GreaterGreater: Out << "?5"; break;
1033 // <operator-name> ::= ?6 # <<
1034 case OO_LessLess: Out << "?6"; break;
1035 // <operator-name> ::= ?7 # !
1036 case OO_Exclaim: Out << "?7"; break;
1037 // <operator-name> ::= ?8 # ==
1038 case OO_EqualEqual: Out << "?8"; break;
1039 // <operator-name> ::= ?9 # !=
1040 case OO_ExclaimEqual: Out << "?9"; break;
1041 // <operator-name> ::= ?A # []
1042 case OO_Subscript: Out << "?A"; break;
1044 // <operator-name> ::= ?C # ->
1045 case OO_Arrow: Out << "?C"; break;
1046 // <operator-name> ::= ?D # *
1047 case OO_Star: Out << "?D"; break;
1048 // <operator-name> ::= ?E # ++
1049 case OO_PlusPlus: Out << "?E"; break;
1050 // <operator-name> ::= ?F # --
1051 case OO_MinusMinus: Out << "?F"; break;
1052 // <operator-name> ::= ?G # -
1053 case OO_Minus: Out << "?G"; break;
1054 // <operator-name> ::= ?H # +
1055 case OO_Plus: Out << "?H"; break;
1056 // <operator-name> ::= ?I # &
1057 case OO_Amp: Out << "?I"; break;
1058 // <operator-name> ::= ?J # ->*
1059 case OO_ArrowStar: Out << "?J"; break;
1060 // <operator-name> ::= ?K # /
1061 case OO_Slash: Out << "?K"; break;
1062 // <operator-name> ::= ?L # %
1063 case OO_Percent: Out << "?L"; break;
1064 // <operator-name> ::= ?M # <
1065 case OO_Less: Out << "?M"; break;
1066 // <operator-name> ::= ?N # <=
1067 case OO_LessEqual: Out << "?N"; break;
1068 // <operator-name> ::= ?O # >
1069 case OO_Greater: Out << "?O"; break;
1070 // <operator-name> ::= ?P # >=
1071 case OO_GreaterEqual: Out << "?P"; break;
1072 // <operator-name> ::= ?Q # ,
1073 case OO_Comma: Out << "?Q"; break;
1074 // <operator-name> ::= ?R # ()
1075 case OO_Call: Out << "?R"; break;
1076 // <operator-name> ::= ?S # ~
1077 case OO_Tilde: Out << "?S"; break;
1078 // <operator-name> ::= ?T # ^
1079 case OO_Caret: Out << "?T"; break;
1080 // <operator-name> ::= ?U # |
1081 case OO_Pipe: Out << "?U"; break;
1082 // <operator-name> ::= ?V # &&
1083 case OO_AmpAmp: Out << "?V"; break;
1084 // <operator-name> ::= ?W # ||
1085 case OO_PipePipe: Out << "?W"; break;
1086 // <operator-name> ::= ?X # *=
1087 case OO_StarEqual: Out << "?X"; break;
1088 // <operator-name> ::= ?Y # +=
1089 case OO_PlusEqual: Out << "?Y"; break;
1090 // <operator-name> ::= ?Z # -=
1091 case OO_MinusEqual: Out << "?Z"; break;
1092 // <operator-name> ::= ?_0 # /=
1093 case OO_SlashEqual: Out << "?_0"; break;
1094 // <operator-name> ::= ?_1 # %=
1095 case OO_PercentEqual: Out << "?_1"; break;
1096 // <operator-name> ::= ?_2 # >>=
1097 case OO_GreaterGreaterEqual: Out << "?_2"; break;
1098 // <operator-name> ::= ?_3 # <<=
1099 case OO_LessLessEqual: Out << "?_3"; break;
1100 // <operator-name> ::= ?_4 # &=
1101 case OO_AmpEqual: Out << "?_4"; break;
1102 // <operator-name> ::= ?_5 # |=
1103 case OO_PipeEqual: Out << "?_5"; break;
1104 // <operator-name> ::= ?_6 # ^=
1105 case OO_CaretEqual: Out << "?_6"; break;
1110 // ?_B # local static guard
1112 // ?_D # vbase destructor
1113 // ?_E # vector deleting destructor
1114 // ?_F # default constructor closure
1115 // ?_G # scalar deleting destructor
1116 // ?_H # vector constructor iterator
1117 // ?_I # vector destructor iterator
1118 // ?_J # vector vbase constructor iterator
1119 // ?_K # virtual displacement map
1120 // ?_L # eh vector constructor iterator
1121 // ?_M # eh vector destructor iterator
1122 // ?_N # eh vector vbase constructor iterator
1123 // ?_O # copy constructor closure
1124 // ?_P<name> # udt returning <name>
1126 // ?_R0 # RTTI Type Descriptor
1127 // ?_R1 # RTTI Base Class Descriptor at (a,b,c,d)
1128 // ?_R2 # RTTI Base Class Array
1129 // ?_R3 # RTTI Class Hierarchy Descriptor
1130 // ?_R4 # RTTI Complete Object Locator
1131 // ?_S # local vftable
1132 // ?_T # local vftable constructor closure
1133 // <operator-name> ::= ?_U # new[]
1134 case OO_Array_New: Out << "?_U"; break;
1135 // <operator-name> ::= ?_V # delete[]
1136 case OO_Array_Delete: Out << "?_V"; break;
1137 // <operator-name> ::= ?__L # co_await
1138 case OO_Coawait: Out << "?__L"; break;
1140 case OO_Conditional: {
1141 DiagnosticsEngine &Diags = Context.getDiags();
1142 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
1143 "cannot mangle this conditional operator yet");
1144 Diags.Report(Loc, DiagID);
1149 case NUM_OVERLOADED_OPERATORS:
1150 llvm_unreachable("Not an overloaded operator");
1154 void MicrosoftCXXNameMangler::mangleSourceName(StringRef Name) {
1155 // <source name> ::= <identifier> @
1156 BackRefVec::iterator Found =
1157 std::find(NameBackReferences.begin(), NameBackReferences.end(), Name);
1158 if (Found == NameBackReferences.end()) {
1159 if (NameBackReferences.size() < 10)
1160 NameBackReferences.push_back(Name);
1163 Out << (Found - NameBackReferences.begin());
1167 void MicrosoftCXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) {
1168 Context.mangleObjCMethodName(MD, Out);
1171 void MicrosoftCXXNameMangler::mangleTemplateInstantiationName(
1172 const TemplateDecl *TD, const TemplateArgumentList &TemplateArgs) {
1173 // <template-name> ::= <unscoped-template-name> <template-args>
1174 // ::= <substitution>
1175 // Always start with the unqualified name.
1177 // Templates have their own context for back references.
1178 ArgBackRefMap OuterArgsContext;
1179 BackRefVec OuterTemplateContext;
1180 PassObjectSizeArgsSet OuterPassObjectSizeArgs;
1181 NameBackReferences.swap(OuterTemplateContext);
1182 TypeBackReferences.swap(OuterArgsContext);
1183 PassObjectSizeArgs.swap(OuterPassObjectSizeArgs);
1185 mangleUnscopedTemplateName(TD);
1186 mangleTemplateArgs(TD, TemplateArgs);
1188 // Restore the previous back reference contexts.
1189 NameBackReferences.swap(OuterTemplateContext);
1190 TypeBackReferences.swap(OuterArgsContext);
1191 PassObjectSizeArgs.swap(OuterPassObjectSizeArgs);
1195 MicrosoftCXXNameMangler::mangleUnscopedTemplateName(const TemplateDecl *TD) {
1196 // <unscoped-template-name> ::= ?$ <unqualified-name>
1198 mangleUnqualifiedName(TD);
1201 void MicrosoftCXXNameMangler::mangleIntegerLiteral(const llvm::APSInt &Value,
1203 // <integer-literal> ::= $0 <number>
1205 // Make sure booleans are encoded as 0/1.
1206 if (IsBoolean && Value.getBoolValue())
1208 else if (Value.isSigned())
1209 mangleNumber(Value.getSExtValue());
1211 mangleNumber(Value.getZExtValue());
1214 void MicrosoftCXXNameMangler::mangleExpression(const Expr *E) {
1215 // See if this is a constant expression.
1217 if (E->isIntegerConstantExpr(Value, Context.getASTContext())) {
1218 mangleIntegerLiteral(Value, E->getType()->isBooleanType());
1222 // Look through no-op casts like template parameter substitutions.
1223 E = E->IgnoreParenNoopCasts(Context.getASTContext());
1225 const CXXUuidofExpr *UE = nullptr;
1226 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
1227 if (UO->getOpcode() == UO_AddrOf)
1228 UE = dyn_cast<CXXUuidofExpr>(UO->getSubExpr());
1230 UE = dyn_cast<CXXUuidofExpr>(E);
1233 // If we had to peek through an address-of operator, treat this like we are
1234 // dealing with a pointer type. Otherwise, treat it like a const reference.
1236 // N.B. This matches up with the handling of TemplateArgument::Declaration
1237 // in mangleTemplateArg
1243 // This CXXUuidofExpr is mangled as-if it were actually a VarDecl from
1244 // const __s_GUID _GUID_{lower case UUID with underscores}
1245 StringRef Uuid = UE->getUuidStr();
1246 std::string Name = "_GUID_" + Uuid.lower();
1247 std::replace(Name.begin(), Name.end(), '-', '_');
1249 mangleSourceName(Name);
1250 // Terminate the whole name with an '@'.
1252 // It's a global variable.
1254 // It's a struct called __s_GUID.
1255 mangleArtificalTagType(TTK_Struct, "__s_GUID");
1261 // As bad as this diagnostic is, it's better than crashing.
1262 DiagnosticsEngine &Diags = Context.getDiags();
1263 unsigned DiagID = Diags.getCustomDiagID(
1264 DiagnosticsEngine::Error, "cannot yet mangle expression type %0");
1265 Diags.Report(E->getExprLoc(), DiagID) << E->getStmtClassName()
1266 << E->getSourceRange();
1269 void MicrosoftCXXNameMangler::mangleTemplateArgs(
1270 const TemplateDecl *TD, const TemplateArgumentList &TemplateArgs) {
1271 // <template-args> ::= <template-arg>+
1272 const TemplateParameterList *TPL = TD->getTemplateParameters();
1273 assert(TPL->size() == TemplateArgs.size() &&
1274 "size mismatch between args and parms!");
1277 for (const TemplateArgument &TA : TemplateArgs.asArray())
1278 mangleTemplateArg(TD, TA, TPL->getParam(Idx++));
1281 void MicrosoftCXXNameMangler::mangleTemplateArg(const TemplateDecl *TD,
1282 const TemplateArgument &TA,
1283 const NamedDecl *Parm) {
1284 // <template-arg> ::= <type>
1285 // ::= <integer-literal>
1286 // ::= <member-data-pointer>
1287 // ::= <member-function-pointer>
1288 // ::= $E? <name> <type-encoding>
1289 // ::= $1? <name> <type-encoding>
1291 // ::= <template-args>
1293 switch (TA.getKind()) {
1294 case TemplateArgument::Null:
1295 llvm_unreachable("Can't mangle null template arguments!");
1296 case TemplateArgument::TemplateExpansion:
1297 llvm_unreachable("Can't mangle template expansion arguments!");
1298 case TemplateArgument::Type: {
1299 QualType T = TA.getAsType();
1300 mangleType(T, SourceRange(), QMM_Escape);
1303 case TemplateArgument::Declaration: {
1304 const NamedDecl *ND = cast<NamedDecl>(TA.getAsDecl());
1305 if (isa<FieldDecl>(ND) || isa<IndirectFieldDecl>(ND)) {
1306 mangleMemberDataPointer(
1307 cast<CXXRecordDecl>(ND->getDeclContext())->getMostRecentDecl(),
1308 cast<ValueDecl>(ND));
1309 } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
1310 const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD);
1311 if (MD && MD->isInstance()) {
1312 mangleMemberFunctionPointer(MD->getParent()->getMostRecentDecl(), MD);
1316 mangleFunctionEncoding(FD, /*ShouldMangle=*/true);
1319 mangle(ND, TA.getParamTypeForDecl()->isReferenceType() ? "$E?" : "$1?");
1323 case TemplateArgument::Integral:
1324 mangleIntegerLiteral(TA.getAsIntegral(),
1325 TA.getIntegralType()->isBooleanType());
1327 case TemplateArgument::NullPtr: {
1328 QualType T = TA.getNullPtrType();
1329 if (const MemberPointerType *MPT = T->getAs<MemberPointerType>()) {
1330 const CXXRecordDecl *RD = MPT->getMostRecentCXXRecordDecl();
1331 if (MPT->isMemberFunctionPointerType() &&
1332 !isa<FunctionTemplateDecl>(TD)) {
1333 mangleMemberFunctionPointer(RD, nullptr);
1336 if (MPT->isMemberDataPointer()) {
1337 if (!isa<FunctionTemplateDecl>(TD)) {
1338 mangleMemberDataPointer(RD, nullptr);
1341 // nullptr data pointers are always represented with a single field
1342 // which is initialized with either 0 or -1. Why -1? Well, we need to
1343 // distinguish the case where the data member is at offset zero in the
1345 // However, we are free to use 0 *if* we would use multiple fields for
1346 // non-nullptr member pointers.
1347 if (!RD->nullFieldOffsetIsZero()) {
1348 mangleIntegerLiteral(llvm::APSInt::get(-1), /*IsBoolean=*/false);
1353 mangleIntegerLiteral(llvm::APSInt::getUnsigned(0), /*IsBoolean=*/false);
1356 case TemplateArgument::Expression:
1357 mangleExpression(TA.getAsExpr());
1359 case TemplateArgument::Pack: {
1360 ArrayRef<TemplateArgument> TemplateArgs = TA.getPackAsArray();
1361 if (TemplateArgs.empty()) {
1362 if (isa<TemplateTypeParmDecl>(Parm) ||
1363 isa<TemplateTemplateParmDecl>(Parm))
1364 // MSVC 2015 changed the mangling for empty expanded template packs,
1365 // use the old mangling for link compatibility for old versions.
1366 Out << (Context.getASTContext().getLangOpts().isCompatibleWithMSVC(
1367 LangOptions::MSVC2015)
1370 else if (isa<NonTypeTemplateParmDecl>(Parm))
1373 llvm_unreachable("unexpected template parameter decl!");
1375 for (const TemplateArgument &PA : TemplateArgs)
1376 mangleTemplateArg(TD, PA, Parm);
1380 case TemplateArgument::Template: {
1381 const NamedDecl *ND =
1382 TA.getAsTemplate().getAsTemplateDecl()->getTemplatedDecl();
1383 if (const auto *TD = dyn_cast<TagDecl>(ND)) {
1385 } else if (isa<TypeAliasDecl>(ND)) {
1389 llvm_unreachable("unexpected template template NamedDecl!");
1396 void MicrosoftCXXNameMangler::mangleQualifiers(Qualifiers Quals,
1398 // <cvr-qualifiers> ::= [E] [F] [I] <base-cvr-qualifiers>
1399 // 'E' means __ptr64 (32-bit only); 'F' means __unaligned (32/64-bit only);
1400 // 'I' means __restrict (32/64-bit).
1401 // Note that the MSVC __restrict keyword isn't the same as the C99 restrict
1403 // <base-cvr-qualifiers> ::= A # near
1404 // ::= B # near const
1405 // ::= C # near volatile
1406 // ::= D # near const volatile
1407 // ::= E # far (16-bit)
1408 // ::= F # far const (16-bit)
1409 // ::= G # far volatile (16-bit)
1410 // ::= H # far const volatile (16-bit)
1411 // ::= I # huge (16-bit)
1412 // ::= J # huge const (16-bit)
1413 // ::= K # huge volatile (16-bit)
1414 // ::= L # huge const volatile (16-bit)
1415 // ::= M <basis> # based
1416 // ::= N <basis> # based const
1417 // ::= O <basis> # based volatile
1418 // ::= P <basis> # based const volatile
1419 // ::= Q # near member
1420 // ::= R # near const member
1421 // ::= S # near volatile member
1422 // ::= T # near const volatile member
1423 // ::= U # far member (16-bit)
1424 // ::= V # far const member (16-bit)
1425 // ::= W # far volatile member (16-bit)
1426 // ::= X # far const volatile member (16-bit)
1427 // ::= Y # huge member (16-bit)
1428 // ::= Z # huge const member (16-bit)
1429 // ::= 0 # huge volatile member (16-bit)
1430 // ::= 1 # huge const volatile member (16-bit)
1431 // ::= 2 <basis> # based member
1432 // ::= 3 <basis> # based const member
1433 // ::= 4 <basis> # based volatile member
1434 // ::= 5 <basis> # based const volatile member
1435 // ::= 6 # near function (pointers only)
1436 // ::= 7 # far function (pointers only)
1437 // ::= 8 # near method (pointers only)
1438 // ::= 9 # far method (pointers only)
1439 // ::= _A <basis> # based function (pointers only)
1440 // ::= _B <basis> # based function (far?) (pointers only)
1441 // ::= _C <basis> # based method (pointers only)
1442 // ::= _D <basis> # based method (far?) (pointers only)
1443 // ::= _E # block (Clang)
1444 // <basis> ::= 0 # __based(void)
1445 // ::= 1 # __based(segment)?
1446 // ::= 2 <name> # __based(name)
1449 // ::= 5 # not really based
1450 bool HasConst = Quals.hasConst(),
1451 HasVolatile = Quals.hasVolatile();
1454 if (HasConst && HasVolatile) {
1456 } else if (HasVolatile) {
1458 } else if (HasConst) {
1464 if (HasConst && HasVolatile) {
1466 } else if (HasVolatile) {
1468 } else if (HasConst) {
1475 // FIXME: For now, just drop all extension qualifiers on the floor.
1479 MicrosoftCXXNameMangler::mangleRefQualifier(RefQualifierKind RefQualifier) {
1480 // <ref-qualifier> ::= G # lvalue reference
1481 // ::= H # rvalue-reference
1482 switch (RefQualifier) {
1496 void MicrosoftCXXNameMangler::manglePointerExtQualifiers(Qualifiers Quals,
1497 QualType PointeeType) {
1498 bool HasRestrict = Quals.hasRestrict();
1499 if (PointersAre64Bit &&
1500 (PointeeType.isNull() || !PointeeType->isFunctionType()))
1506 if (Quals.hasUnaligned() ||
1507 (!PointeeType.isNull() && PointeeType.getLocalQualifiers().hasUnaligned()))
1511 void MicrosoftCXXNameMangler::manglePointerCVQualifiers(Qualifiers Quals) {
1512 // <pointer-cv-qualifiers> ::= P # no qualifiers
1515 // ::= S # const volatile
1516 bool HasConst = Quals.hasConst(),
1517 HasVolatile = Quals.hasVolatile();
1519 if (HasConst && HasVolatile) {
1521 } else if (HasVolatile) {
1523 } else if (HasConst) {
1530 void MicrosoftCXXNameMangler::mangleArgumentType(QualType T,
1531 SourceRange Range) {
1532 // MSVC will backreference two canonically equivalent types that have slightly
1533 // different manglings when mangled alone.
1535 // Decayed types do not match up with non-decayed versions of the same type.
1538 // void (*x)(void) will not form a backreference with void x(void)
1540 if (const auto *DT = T->getAs<DecayedType>()) {
1541 QualType OriginalType = DT->getOriginalType();
1542 // All decayed ArrayTypes should be treated identically; as-if they were
1543 // a decayed IncompleteArrayType.
1544 if (const auto *AT = getASTContext().getAsArrayType(OriginalType))
1545 OriginalType = getASTContext().getIncompleteArrayType(
1546 AT->getElementType(), AT->getSizeModifier(),
1547 AT->getIndexTypeCVRQualifiers());
1549 TypePtr = OriginalType.getCanonicalType().getAsOpaquePtr();
1550 // If the original parameter was textually written as an array,
1551 // instead treat the decayed parameter like it's const.
1554 // int [] -> int * const
1555 if (OriginalType->isArrayType())
1558 TypePtr = T.getCanonicalType().getAsOpaquePtr();
1561 ArgBackRefMap::iterator Found = TypeBackReferences.find(TypePtr);
1563 if (Found == TypeBackReferences.end()) {
1564 size_t OutSizeBefore = Out.tell();
1566 mangleType(T, Range, QMM_Drop);
1568 // See if it's worth creating a back reference.
1569 // Only types longer than 1 character are considered
1570 // and only 10 back references slots are available:
1571 bool LongerThanOneChar = (Out.tell() - OutSizeBefore > 1);
1572 if (LongerThanOneChar && TypeBackReferences.size() < 10) {
1573 size_t Size = TypeBackReferences.size();
1574 TypeBackReferences[TypePtr] = Size;
1577 Out << Found->second;
1581 void MicrosoftCXXNameMangler::manglePassObjectSizeArg(
1582 const PassObjectSizeAttr *POSA) {
1583 int Type = POSA->getType();
1585 auto Iter = PassObjectSizeArgs.insert(Type).first;
1586 auto *TypePtr = (const void *)&*Iter;
1587 ArgBackRefMap::iterator Found = TypeBackReferences.find(TypePtr);
1589 if (Found == TypeBackReferences.end()) {
1590 mangleArtificalTagType(TTK_Enum, "__pass_object_size" + llvm::utostr(Type),
1593 if (TypeBackReferences.size() < 10) {
1594 size_t Size = TypeBackReferences.size();
1595 TypeBackReferences[TypePtr] = Size;
1598 Out << Found->second;
1602 void MicrosoftCXXNameMangler::mangleType(QualType T, SourceRange Range,
1603 QualifierMangleMode QMM) {
1604 // Don't use the canonical types. MSVC includes things like 'const' on
1605 // pointer arguments to function pointers that canonicalization strips away.
1606 T = T.getDesugaredType(getASTContext());
1607 Qualifiers Quals = T.getLocalQualifiers();
1608 if (const ArrayType *AT = getASTContext().getAsArrayType(T)) {
1609 // If there were any Quals, getAsArrayType() pushed them onto the array
1611 if (QMM == QMM_Mangle)
1613 else if (QMM == QMM_Escape || QMM == QMM_Result)
1615 mangleArrayType(AT);
1619 bool IsPointer = T->isAnyPointerType() || T->isMemberPointerType() ||
1620 T->isReferenceType() || T->isBlockPointerType();
1626 if (const FunctionType *FT = dyn_cast<FunctionType>(T)) {
1628 mangleFunctionType(FT);
1631 mangleQualifiers(Quals, false);
1634 if (!IsPointer && Quals) {
1636 mangleQualifiers(Quals, false);
1640 // Presence of __unaligned qualifier shouldn't affect mangling here.
1641 Quals.removeUnaligned();
1642 if ((!IsPointer && Quals) || isa<TagType>(T)) {
1644 mangleQualifiers(Quals, false);
1649 const Type *ty = T.getTypePtr();
1651 switch (ty->getTypeClass()) {
1652 #define ABSTRACT_TYPE(CLASS, PARENT)
1653 #define NON_CANONICAL_TYPE(CLASS, PARENT) \
1655 llvm_unreachable("can't mangle non-canonical type " #CLASS "Type"); \
1657 #define TYPE(CLASS, PARENT) \
1659 mangleType(cast<CLASS##Type>(ty), Quals, Range); \
1661 #include "clang/AST/TypeNodes.def"
1662 #undef ABSTRACT_TYPE
1663 #undef NON_CANONICAL_TYPE
1668 void MicrosoftCXXNameMangler::mangleType(const BuiltinType *T, Qualifiers,
1669 SourceRange Range) {
1670 // <type> ::= <builtin-type>
1671 // <builtin-type> ::= X # void
1672 // ::= C # signed char
1674 // ::= E # unsigned char
1676 // ::= G # unsigned short (or wchar_t if it's not a builtin)
1678 // ::= I # unsigned int
1680 // ::= K # unsigned long
1684 // ::= O # long double (__float80 is mangled differently)
1685 // ::= _J # long long, __int64
1686 // ::= _K # unsigned long long, __int64
1687 // ::= _L # __int128
1688 // ::= _M # unsigned __int128
1690 // _O # <array in parameter>
1691 // ::= _T # __float80 (Intel)
1693 // ::= _Z # __float80 (Digital Mars)
1694 switch (T->getKind()) {
1695 case BuiltinType::Void:
1698 case BuiltinType::SChar:
1701 case BuiltinType::Char_U:
1702 case BuiltinType::Char_S:
1705 case BuiltinType::UChar:
1708 case BuiltinType::Short:
1711 case BuiltinType::UShort:
1714 case BuiltinType::Int:
1717 case BuiltinType::UInt:
1720 case BuiltinType::Long:
1723 case BuiltinType::ULong:
1726 case BuiltinType::Float:
1729 case BuiltinType::Double:
1732 // TODO: Determine size and mangle accordingly
1733 case BuiltinType::LongDouble:
1736 case BuiltinType::LongLong:
1739 case BuiltinType::ULongLong:
1742 case BuiltinType::Int128:
1745 case BuiltinType::UInt128:
1748 case BuiltinType::Bool:
1751 case BuiltinType::Char16:
1754 case BuiltinType::Char32:
1757 case BuiltinType::WChar_S:
1758 case BuiltinType::WChar_U:
1762 #define BUILTIN_TYPE(Id, SingletonId)
1763 #define PLACEHOLDER_TYPE(Id, SingletonId) \
1764 case BuiltinType::Id:
1765 #include "clang/AST/BuiltinTypes.def"
1766 case BuiltinType::Dependent:
1767 llvm_unreachable("placeholder types shouldn't get to name mangling");
1769 case BuiltinType::ObjCId:
1771 mangleArtificalTagType(TTK_Struct, "objc_object");
1773 case BuiltinType::ObjCClass:
1775 mangleArtificalTagType(TTK_Struct, "objc_class");
1777 case BuiltinType::ObjCSel:
1779 mangleArtificalTagType(TTK_Struct, "objc_selector");
1782 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
1783 case BuiltinType::Id: \
1784 Out << "PAUocl_" #ImgType "_" #Suffix "@@"; \
1786 #include "clang/Basic/OpenCLImageTypes.def"
1787 case BuiltinType::OCLSampler:
1789 mangleArtificalTagType(TTK_Struct, "ocl_sampler");
1791 case BuiltinType::OCLEvent:
1793 mangleArtificalTagType(TTK_Struct, "ocl_event");
1795 case BuiltinType::OCLClkEvent:
1797 mangleArtificalTagType(TTK_Struct, "ocl_clkevent");
1799 case BuiltinType::OCLQueue:
1801 mangleArtificalTagType(TTK_Struct, "ocl_queue");
1803 case BuiltinType::OCLReserveID:
1805 mangleArtificalTagType(TTK_Struct, "ocl_reserveid");
1808 case BuiltinType::NullPtr:
1812 case BuiltinType::Float128:
1813 case BuiltinType::Half: {
1814 DiagnosticsEngine &Diags = Context.getDiags();
1815 unsigned DiagID = Diags.getCustomDiagID(
1816 DiagnosticsEngine::Error, "cannot mangle this built-in %0 type yet");
1817 Diags.Report(Range.getBegin(), DiagID)
1818 << T->getName(Context.getASTContext().getPrintingPolicy()) << Range;
1824 // <type> ::= <function-type>
1825 void MicrosoftCXXNameMangler::mangleType(const FunctionProtoType *T, Qualifiers,
1827 // Structors only appear in decls, so at this point we know it's not a
1829 // FIXME: This may not be lambda-friendly.
1830 if (T->getTypeQuals() || T->getRefQualifier() != RQ_None) {
1832 mangleFunctionType(T, /*D=*/nullptr, /*ForceThisQuals=*/true);
1835 mangleFunctionType(T);
1838 void MicrosoftCXXNameMangler::mangleType(const FunctionNoProtoType *T,
1839 Qualifiers, SourceRange) {
1841 mangleFunctionType(T);
1844 void MicrosoftCXXNameMangler::mangleFunctionType(const FunctionType *T,
1845 const FunctionDecl *D,
1846 bool ForceThisQuals) {
1847 // <function-type> ::= <this-cvr-qualifiers> <calling-convention>
1848 // <return-type> <argument-list> <throw-spec>
1849 const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(T);
1852 if (D) Range = D->getSourceRange();
1854 bool IsInLambda = false;
1855 bool IsStructor = false, HasThisQuals = ForceThisQuals, IsCtorClosure = false;
1856 CallingConv CC = T->getCallConv();
1857 if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(D)) {
1858 if (MD->getParent()->isLambda())
1860 if (MD->isInstance())
1861 HasThisQuals = true;
1862 if (isa<CXXDestructorDecl>(MD)) {
1864 } else if (isa<CXXConstructorDecl>(MD)) {
1866 IsCtorClosure = (StructorType == Ctor_CopyingClosure ||
1867 StructorType == Ctor_DefaultClosure) &&
1870 CC = getASTContext().getDefaultCallingConvention(
1871 /*IsVariadic=*/false, /*IsCXXMethod=*/true);
1875 // If this is a C++ instance method, mangle the CVR qualifiers for the
1878 Qualifiers Quals = Qualifiers::fromCVRUMask(Proto->getTypeQuals());
1879 manglePointerExtQualifiers(Quals, /*PointeeType=*/QualType());
1880 mangleRefQualifier(Proto->getRefQualifier());
1881 mangleQualifiers(Quals, /*IsMember=*/false);
1884 mangleCallingConvention(CC);
1886 // <return-type> ::= <type>
1887 // ::= @ # structors (they have no declared return type)
1889 if (isa<CXXDestructorDecl>(D) && isStructorDecl(D)) {
1890 // The scalar deleting destructor takes an extra int argument which is not
1891 // reflected in the AST.
1892 if (StructorType == Dtor_Deleting) {
1893 Out << (PointersAre64Bit ? "PEAXI@Z" : "PAXI@Z");
1896 // The vbase destructor returns void which is not reflected in the AST.
1897 if (StructorType == Dtor_Complete) {
1902 if (IsCtorClosure) {
1903 // Default constructor closure and copy constructor closure both return
1907 if (StructorType == Ctor_DefaultClosure) {
1908 // Default constructor closure always has no arguments.
1910 } else if (StructorType == Ctor_CopyingClosure) {
1911 // Copy constructor closure always takes an unqualified reference.
1912 mangleArgumentType(getASTContext().getLValueReferenceType(
1913 Proto->getParamType(0)
1914 ->getAs<LValueReferenceType>()
1916 /*SpelledAsLValue=*/true),
1920 llvm_unreachable("unexpected constructor closure!");
1927 QualType ResultType = T->getReturnType();
1928 if (const auto *AT =
1929 dyn_cast_or_null<AutoType>(ResultType->getContainedAutoType())) {
1931 mangleQualifiers(ResultType.getLocalQualifiers(), /*IsMember=*/false);
1933 assert(AT->getKeyword() != AutoTypeKeyword::GNUAutoType &&
1934 "shouldn't need to mangle __auto_type!");
1935 mangleSourceName(AT->isDecltypeAuto() ? "<decltype-auto>" : "<auto>");
1937 } else if (IsInLambda) {
1940 if (ResultType->isVoidType())
1941 ResultType = ResultType.getUnqualifiedType();
1942 mangleType(ResultType, Range, QMM_Result);
1946 // <argument-list> ::= X # void
1948 // ::= <type>* Z # varargs
1950 // Function types without prototypes can arise when mangling a function type
1951 // within an overloadable function in C. We mangle these as the absence of
1952 // any parameter types (not even an empty parameter list).
1954 } else if (Proto->getNumParams() == 0 && !Proto->isVariadic()) {
1957 // Happens for function pointer type arguments for example.
1958 for (unsigned I = 0, E = Proto->getNumParams(); I != E; ++I) {
1959 mangleArgumentType(Proto->getParamType(I), Range);
1960 // Mangle each pass_object_size parameter as if it's a parameter of enum
1961 // type passed directly after the parameter with the pass_object_size
1962 // attribute. The aforementioned enum's name is __pass_object_size, and we
1963 // pretend it resides in a top-level namespace called __clang.
1965 // FIXME: Is there a defined extension notation for the MS ABI, or is it
1966 // necessary to just cross our fingers and hope this type+namespace
1967 // combination doesn't conflict with anything?
1969 if (const auto *P = D->getParamDecl(I)->getAttr<PassObjectSizeAttr>())
1970 manglePassObjectSizeArg(P);
1972 // <builtin-type> ::= Z # ellipsis
1973 if (Proto->isVariadic())
1979 mangleThrowSpecification(Proto);
1982 void MicrosoftCXXNameMangler::mangleFunctionClass(const FunctionDecl *FD) {
1983 // <function-class> ::= <member-function> E? # E designates a 64-bit 'this'
1984 // # pointer. in 64-bit mode *all*
1985 // # 'this' pointers are 64-bit.
1986 // ::= <global-function>
1987 // <member-function> ::= A # private: near
1988 // ::= B # private: far
1989 // ::= C # private: static near
1990 // ::= D # private: static far
1991 // ::= E # private: virtual near
1992 // ::= F # private: virtual far
1993 // ::= I # protected: near
1994 // ::= J # protected: far
1995 // ::= K # protected: static near
1996 // ::= L # protected: static far
1997 // ::= M # protected: virtual near
1998 // ::= N # protected: virtual far
1999 // ::= Q # public: near
2000 // ::= R # public: far
2001 // ::= S # public: static near
2002 // ::= T # public: static far
2003 // ::= U # public: virtual near
2004 // ::= V # public: virtual far
2005 // <global-function> ::= Y # global near
2006 // ::= Z # global far
2007 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
2008 bool IsVirtual = MD->isVirtual();
2009 // When mangling vbase destructor variants, ignore whether or not the
2010 // underlying destructor was defined to be virtual.
2011 if (isa<CXXDestructorDecl>(MD) && isStructorDecl(MD) &&
2012 StructorType == Dtor_Complete) {
2015 switch (MD->getAccess()) {
2017 llvm_unreachable("Unsupported access specifier");
2046 void MicrosoftCXXNameMangler::mangleCallingConvention(CallingConv CC) {
2047 // <calling-convention> ::= A # __cdecl
2048 // ::= B # __export __cdecl
2050 // ::= D # __export __pascal
2051 // ::= E # __thiscall
2052 // ::= F # __export __thiscall
2053 // ::= G # __stdcall
2054 // ::= H # __export __stdcall
2055 // ::= I # __fastcall
2056 // ::= J # __export __fastcall
2057 // ::= Q # __vectorcall
2058 // ::= w # __regcall
2059 // The 'export' calling conventions are from a bygone era
2060 // (*cough*Win16*cough*) when functions were declared for export with
2061 // that keyword. (It didn't actually export them, it just made them so
2062 // that they could be in a DLL and somebody from another module could call
2067 llvm_unreachable("Unsupported CC for mangling");
2068 case CC_X86_64Win64:
2070 case CC_C: Out << 'A'; break;
2071 case CC_X86Pascal: Out << 'C'; break;
2072 case CC_X86ThisCall: Out << 'E'; break;
2073 case CC_X86StdCall: Out << 'G'; break;
2074 case CC_X86FastCall: Out << 'I'; break;
2075 case CC_X86VectorCall: Out << 'Q'; break;
2076 case CC_X86RegCall: Out << 'w'; break;
2079 void MicrosoftCXXNameMangler::mangleCallingConvention(const FunctionType *T) {
2080 mangleCallingConvention(T->getCallConv());
2082 void MicrosoftCXXNameMangler::mangleThrowSpecification(
2083 const FunctionProtoType *FT) {
2084 // <throw-spec> ::= Z # throw(...) (default)
2085 // ::= @ # throw() or __declspec/__attribute__((nothrow))
2087 // NOTE: Since the Microsoft compiler ignores throw specifications, they are
2088 // all actually mangled as 'Z'. (They're ignored because their associated
2089 // functionality isn't implemented, and probably never will be.)
2093 void MicrosoftCXXNameMangler::mangleType(const UnresolvedUsingType *T,
2094 Qualifiers, SourceRange Range) {
2095 // Probably should be mangled as a template instantiation; need to see what
2097 DiagnosticsEngine &Diags = Context.getDiags();
2098 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2099 "cannot mangle this unresolved dependent type yet");
2100 Diags.Report(Range.getBegin(), DiagID)
2104 // <type> ::= <union-type> | <struct-type> | <class-type> | <enum-type>
2105 // <union-type> ::= T <name>
2106 // <struct-type> ::= U <name>
2107 // <class-type> ::= V <name>
2108 // <enum-type> ::= W4 <name>
2109 void MicrosoftCXXNameMangler::mangleTagTypeKind(TagTypeKind TTK) {
2126 void MicrosoftCXXNameMangler::mangleType(const EnumType *T, Qualifiers,
2128 mangleType(cast<TagType>(T)->getDecl());
2130 void MicrosoftCXXNameMangler::mangleType(const RecordType *T, Qualifiers,
2132 mangleType(cast<TagType>(T)->getDecl());
2134 void MicrosoftCXXNameMangler::mangleType(const TagDecl *TD) {
2135 mangleTagTypeKind(TD->getTagKind());
2138 void MicrosoftCXXNameMangler::mangleArtificalTagType(
2139 TagTypeKind TK, StringRef UnqualifiedName, ArrayRef<StringRef> NestedNames) {
2140 // <name> ::= <unscoped-name> {[<named-scope>]+ | [<nested-name>]}? @
2141 mangleTagTypeKind(TK);
2143 // Always start with the unqualified name.
2144 mangleSourceName(UnqualifiedName);
2146 for (auto I = NestedNames.rbegin(), E = NestedNames.rend(); I != E; ++I)
2147 mangleSourceName(*I);
2149 // Terminate the whole name with an '@'.
2153 // <type> ::= <array-type>
2154 // <array-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers>
2155 // [Y <dimension-count> <dimension>+]
2156 // <element-type> # as global, E is never required
2157 // It's supposed to be the other way around, but for some strange reason, it
2158 // isn't. Today this behavior is retained for the sole purpose of backwards
2160 void MicrosoftCXXNameMangler::mangleDecayedArrayType(const ArrayType *T) {
2161 // This isn't a recursive mangling, so now we have to do it all in this
2163 manglePointerCVQualifiers(T->getElementType().getQualifiers());
2164 mangleType(T->getElementType(), SourceRange());
2166 void MicrosoftCXXNameMangler::mangleType(const ConstantArrayType *T, Qualifiers,
2168 llvm_unreachable("Should have been special cased");
2170 void MicrosoftCXXNameMangler::mangleType(const VariableArrayType *T, Qualifiers,
2172 llvm_unreachable("Should have been special cased");
2174 void MicrosoftCXXNameMangler::mangleType(const DependentSizedArrayType *T,
2175 Qualifiers, SourceRange) {
2176 llvm_unreachable("Should have been special cased");
2178 void MicrosoftCXXNameMangler::mangleType(const IncompleteArrayType *T,
2179 Qualifiers, SourceRange) {
2180 llvm_unreachable("Should have been special cased");
2182 void MicrosoftCXXNameMangler::mangleArrayType(const ArrayType *T) {
2183 QualType ElementTy(T, 0);
2184 SmallVector<llvm::APInt, 3> Dimensions;
2186 if (ElementTy->isConstantArrayType()) {
2187 const ConstantArrayType *CAT =
2188 getASTContext().getAsConstantArrayType(ElementTy);
2189 Dimensions.push_back(CAT->getSize());
2190 ElementTy = CAT->getElementType();
2191 } else if (ElementTy->isIncompleteArrayType()) {
2192 const IncompleteArrayType *IAT =
2193 getASTContext().getAsIncompleteArrayType(ElementTy);
2194 Dimensions.push_back(llvm::APInt(32, 0));
2195 ElementTy = IAT->getElementType();
2196 } else if (ElementTy->isVariableArrayType()) {
2197 const VariableArrayType *VAT =
2198 getASTContext().getAsVariableArrayType(ElementTy);
2199 Dimensions.push_back(llvm::APInt(32, 0));
2200 ElementTy = VAT->getElementType();
2201 } else if (ElementTy->isDependentSizedArrayType()) {
2202 // The dependent expression has to be folded into a constant (TODO).
2203 const DependentSizedArrayType *DSAT =
2204 getASTContext().getAsDependentSizedArrayType(ElementTy);
2205 DiagnosticsEngine &Diags = Context.getDiags();
2206 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2207 "cannot mangle this dependent-length array yet");
2208 Diags.Report(DSAT->getSizeExpr()->getExprLoc(), DiagID)
2209 << DSAT->getBracketsRange();
2216 // <dimension-count> ::= <number> # number of extra dimensions
2217 mangleNumber(Dimensions.size());
2218 for (const llvm::APInt &Dimension : Dimensions)
2219 mangleNumber(Dimension.getLimitedValue());
2220 mangleType(ElementTy, SourceRange(), QMM_Escape);
2223 // <type> ::= <pointer-to-member-type>
2224 // <pointer-to-member-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers>
2225 // <class name> <type>
2226 void MicrosoftCXXNameMangler::mangleType(const MemberPointerType *T, Qualifiers Quals,
2227 SourceRange Range) {
2228 QualType PointeeType = T->getPointeeType();
2229 manglePointerCVQualifiers(Quals);
2230 manglePointerExtQualifiers(Quals, PointeeType);
2231 if (const FunctionProtoType *FPT = PointeeType->getAs<FunctionProtoType>()) {
2233 mangleName(T->getClass()->castAs<RecordType>()->getDecl());
2234 mangleFunctionType(FPT, nullptr, true);
2236 mangleQualifiers(PointeeType.getQualifiers(), true);
2237 mangleName(T->getClass()->castAs<RecordType>()->getDecl());
2238 mangleType(PointeeType, Range, QMM_Drop);
2242 void MicrosoftCXXNameMangler::mangleType(const TemplateTypeParmType *T,
2243 Qualifiers, SourceRange Range) {
2244 DiagnosticsEngine &Diags = Context.getDiags();
2245 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2246 "cannot mangle this template type parameter type yet");
2247 Diags.Report(Range.getBegin(), DiagID)
2251 void MicrosoftCXXNameMangler::mangleType(const SubstTemplateTypeParmPackType *T,
2252 Qualifiers, SourceRange Range) {
2253 DiagnosticsEngine &Diags = Context.getDiags();
2254 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2255 "cannot mangle this substituted parameter pack yet");
2256 Diags.Report(Range.getBegin(), DiagID)
2260 // <type> ::= <pointer-type>
2261 // <pointer-type> ::= E? <pointer-cvr-qualifiers> <cvr-qualifiers> <type>
2262 // # the E is required for 64-bit non-static pointers
2263 void MicrosoftCXXNameMangler::mangleType(const PointerType *T, Qualifiers Quals,
2264 SourceRange Range) {
2265 QualType PointeeType = T->getPointeeType();
2266 manglePointerCVQualifiers(Quals);
2267 manglePointerExtQualifiers(Quals, PointeeType);
2268 mangleType(PointeeType, Range);
2270 void MicrosoftCXXNameMangler::mangleType(const ObjCObjectPointerType *T,
2271 Qualifiers Quals, SourceRange Range) {
2272 QualType PointeeType = T->getPointeeType();
2273 manglePointerCVQualifiers(Quals);
2274 manglePointerExtQualifiers(Quals, PointeeType);
2275 // Object pointers never have qualifiers.
2277 mangleType(PointeeType, Range);
2280 // <type> ::= <reference-type>
2281 // <reference-type> ::= A E? <cvr-qualifiers> <type>
2282 // # the E is required for 64-bit non-static lvalue references
2283 void MicrosoftCXXNameMangler::mangleType(const LValueReferenceType *T,
2284 Qualifiers Quals, SourceRange Range) {
2285 QualType PointeeType = T->getPointeeType();
2286 assert(!Quals.hasConst() && !Quals.hasVolatile() && "unexpected qualifier!");
2288 manglePointerExtQualifiers(Quals, PointeeType);
2289 mangleType(PointeeType, Range);
2292 // <type> ::= <r-value-reference-type>
2293 // <r-value-reference-type> ::= $$Q E? <cvr-qualifiers> <type>
2294 // # the E is required for 64-bit non-static rvalue references
2295 void MicrosoftCXXNameMangler::mangleType(const RValueReferenceType *T,
2296 Qualifiers Quals, SourceRange Range) {
2297 QualType PointeeType = T->getPointeeType();
2298 assert(!Quals.hasConst() && !Quals.hasVolatile() && "unexpected qualifier!");
2300 manglePointerExtQualifiers(Quals, PointeeType);
2301 mangleType(PointeeType, Range);
2304 void MicrosoftCXXNameMangler::mangleType(const ComplexType *T, Qualifiers,
2305 SourceRange Range) {
2306 QualType ElementType = T->getElementType();
2308 llvm::SmallString<64> TemplateMangling;
2309 llvm::raw_svector_ostream Stream(TemplateMangling);
2310 MicrosoftCXXNameMangler Extra(Context, Stream);
2312 Extra.mangleSourceName("_Complex");
2313 Extra.mangleType(ElementType, Range, QMM_Escape);
2315 mangleArtificalTagType(TTK_Struct, TemplateMangling, {"__clang"});
2318 void MicrosoftCXXNameMangler::mangleType(const VectorType *T, Qualifiers Quals,
2319 SourceRange Range) {
2320 const BuiltinType *ET = T->getElementType()->getAs<BuiltinType>();
2321 assert(ET && "vectors with non-builtin elements are unsupported");
2322 uint64_t Width = getASTContext().getTypeSize(T);
2323 // Pattern match exactly the typedefs in our intrinsic headers. Anything that
2324 // doesn't match the Intel types uses a custom mangling below.
2325 size_t OutSizeBefore = Out.tell();
2326 llvm::Triple::ArchType AT =
2327 getASTContext().getTargetInfo().getTriple().getArch();
2328 if (AT == llvm::Triple::x86 || AT == llvm::Triple::x86_64) {
2329 if (Width == 64 && ET->getKind() == BuiltinType::LongLong) {
2330 mangleArtificalTagType(TTK_Union, "__m64");
2331 } else if (Width >= 128) {
2332 if (ET->getKind() == BuiltinType::Float)
2333 mangleArtificalTagType(TTK_Union, "__m" + llvm::utostr(Width));
2334 else if (ET->getKind() == BuiltinType::LongLong)
2335 mangleArtificalTagType(TTK_Union, "__m" + llvm::utostr(Width) + 'i');
2336 else if (ET->getKind() == BuiltinType::Double)
2337 mangleArtificalTagType(TTK_Struct, "__m" + llvm::utostr(Width) + 'd');
2341 bool IsBuiltin = Out.tell() != OutSizeBefore;
2343 // The MS ABI doesn't have a special mangling for vector types, so we define
2344 // our own mangling to handle uses of __vector_size__ on user-specified
2345 // types, and for extensions like __v4sf.
2347 llvm::SmallString<64> TemplateMangling;
2348 llvm::raw_svector_ostream Stream(TemplateMangling);
2349 MicrosoftCXXNameMangler Extra(Context, Stream);
2351 Extra.mangleSourceName("__vector");
2352 Extra.mangleType(QualType(ET, 0), Range, QMM_Escape);
2353 Extra.mangleIntegerLiteral(llvm::APSInt::getUnsigned(T->getNumElements()),
2354 /*IsBoolean=*/false);
2356 mangleArtificalTagType(TTK_Union, TemplateMangling, {"__clang"});
2360 void MicrosoftCXXNameMangler::mangleType(const ExtVectorType *T,
2361 Qualifiers Quals, SourceRange Range) {
2362 mangleType(static_cast<const VectorType *>(T), Quals, Range);
2364 void MicrosoftCXXNameMangler::mangleType(const DependentSizedExtVectorType *T,
2365 Qualifiers, SourceRange Range) {
2366 DiagnosticsEngine &Diags = Context.getDiags();
2367 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2368 "cannot mangle this dependent-sized extended vector type yet");
2369 Diags.Report(Range.getBegin(), DiagID)
2373 void MicrosoftCXXNameMangler::mangleType(const ObjCInterfaceType *T, Qualifiers,
2375 // ObjC interfaces have structs underlying them.
2376 mangleTagTypeKind(TTK_Struct);
2377 mangleName(T->getDecl());
2380 void MicrosoftCXXNameMangler::mangleType(const ObjCObjectType *T, Qualifiers,
2381 SourceRange Range) {
2382 // We don't allow overloading by different protocol qualification,
2383 // so mangling them isn't necessary.
2384 mangleType(T->getBaseType(), Range);
2387 void MicrosoftCXXNameMangler::mangleType(const BlockPointerType *T,
2388 Qualifiers Quals, SourceRange Range) {
2389 QualType PointeeType = T->getPointeeType();
2390 manglePointerCVQualifiers(Quals);
2391 manglePointerExtQualifiers(Quals, PointeeType);
2395 mangleFunctionType(PointeeType->castAs<FunctionProtoType>());
2398 void MicrosoftCXXNameMangler::mangleType(const InjectedClassNameType *,
2399 Qualifiers, SourceRange) {
2400 llvm_unreachable("Cannot mangle injected class name type.");
2403 void MicrosoftCXXNameMangler::mangleType(const TemplateSpecializationType *T,
2404 Qualifiers, SourceRange Range) {
2405 DiagnosticsEngine &Diags = Context.getDiags();
2406 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2407 "cannot mangle this template specialization type yet");
2408 Diags.Report(Range.getBegin(), DiagID)
2412 void MicrosoftCXXNameMangler::mangleType(const DependentNameType *T, Qualifiers,
2413 SourceRange Range) {
2414 DiagnosticsEngine &Diags = Context.getDiags();
2415 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2416 "cannot mangle this dependent name type yet");
2417 Diags.Report(Range.getBegin(), DiagID)
2421 void MicrosoftCXXNameMangler::mangleType(
2422 const DependentTemplateSpecializationType *T, Qualifiers,
2423 SourceRange Range) {
2424 DiagnosticsEngine &Diags = Context.getDiags();
2425 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2426 "cannot mangle this dependent template specialization type yet");
2427 Diags.Report(Range.getBegin(), DiagID)
2431 void MicrosoftCXXNameMangler::mangleType(const PackExpansionType *T, Qualifiers,
2432 SourceRange Range) {
2433 DiagnosticsEngine &Diags = Context.getDiags();
2434 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2435 "cannot mangle this pack expansion yet");
2436 Diags.Report(Range.getBegin(), DiagID)
2440 void MicrosoftCXXNameMangler::mangleType(const TypeOfType *T, Qualifiers,
2441 SourceRange Range) {
2442 DiagnosticsEngine &Diags = Context.getDiags();
2443 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2444 "cannot mangle this typeof(type) yet");
2445 Diags.Report(Range.getBegin(), DiagID)
2449 void MicrosoftCXXNameMangler::mangleType(const TypeOfExprType *T, Qualifiers,
2450 SourceRange Range) {
2451 DiagnosticsEngine &Diags = Context.getDiags();
2452 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2453 "cannot mangle this typeof(expression) yet");
2454 Diags.Report(Range.getBegin(), DiagID)
2458 void MicrosoftCXXNameMangler::mangleType(const DecltypeType *T, Qualifiers,
2459 SourceRange Range) {
2460 DiagnosticsEngine &Diags = Context.getDiags();
2461 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2462 "cannot mangle this decltype() yet");
2463 Diags.Report(Range.getBegin(), DiagID)
2467 void MicrosoftCXXNameMangler::mangleType(const UnaryTransformType *T,
2468 Qualifiers, SourceRange Range) {
2469 DiagnosticsEngine &Diags = Context.getDiags();
2470 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2471 "cannot mangle this unary transform type yet");
2472 Diags.Report(Range.getBegin(), DiagID)
2476 void MicrosoftCXXNameMangler::mangleType(const AutoType *T, Qualifiers,
2477 SourceRange Range) {
2478 assert(T->getDeducedType().isNull() && "expecting a dependent type!");
2480 DiagnosticsEngine &Diags = Context.getDiags();
2481 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2482 "cannot mangle this 'auto' type yet");
2483 Diags.Report(Range.getBegin(), DiagID)
2487 void MicrosoftCXXNameMangler::mangleType(
2488 const DeducedTemplateSpecializationType *T, Qualifiers, SourceRange Range) {
2489 assert(T->getDeducedType().isNull() && "expecting a dependent type!");
2491 DiagnosticsEngine &Diags = Context.getDiags();
2492 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2493 "cannot mangle this deduced class template specialization type yet");
2494 Diags.Report(Range.getBegin(), DiagID)
2498 void MicrosoftCXXNameMangler::mangleType(const AtomicType *T, Qualifiers,
2499 SourceRange Range) {
2500 QualType ValueType = T->getValueType();
2502 llvm::SmallString<64> TemplateMangling;
2503 llvm::raw_svector_ostream Stream(TemplateMangling);
2504 MicrosoftCXXNameMangler Extra(Context, Stream);
2506 Extra.mangleSourceName("_Atomic");
2507 Extra.mangleType(ValueType, Range, QMM_Escape);
2509 mangleArtificalTagType(TTK_Struct, TemplateMangling, {"__clang"});
2512 void MicrosoftCXXNameMangler::mangleType(const PipeType *T, Qualifiers,
2513 SourceRange Range) {
2514 DiagnosticsEngine &Diags = Context.getDiags();
2515 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2516 "cannot mangle this OpenCL pipe type yet");
2517 Diags.Report(Range.getBegin(), DiagID)
2521 void MicrosoftMangleContextImpl::mangleCXXName(const NamedDecl *D,
2523 assert((isa<FunctionDecl>(D) || isa<VarDecl>(D)) &&
2524 "Invalid mangleName() call, argument is not a variable or function!");
2525 assert(!isa<CXXConstructorDecl>(D) && !isa<CXXDestructorDecl>(D) &&
2526 "Invalid mangleName() call on 'structor decl!");
2528 PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
2529 getASTContext().getSourceManager(),
2530 "Mangling declaration");
2532 msvc_hashing_ostream MHO(Out);
2533 MicrosoftCXXNameMangler Mangler(*this, MHO);
2534 return Mangler.mangle(D);
2537 // <this-adjustment> ::= <no-adjustment> | <static-adjustment> |
2538 // <virtual-adjustment>
2539 // <no-adjustment> ::= A # private near
2540 // ::= B # private far
2541 // ::= I # protected near
2542 // ::= J # protected far
2543 // ::= Q # public near
2544 // ::= R # public far
2545 // <static-adjustment> ::= G <static-offset> # private near
2546 // ::= H <static-offset> # private far
2547 // ::= O <static-offset> # protected near
2548 // ::= P <static-offset> # protected far
2549 // ::= W <static-offset> # public near
2550 // ::= X <static-offset> # public far
2551 // <virtual-adjustment> ::= $0 <virtual-shift> <static-offset> # private near
2552 // ::= $1 <virtual-shift> <static-offset> # private far
2553 // ::= $2 <virtual-shift> <static-offset> # protected near
2554 // ::= $3 <virtual-shift> <static-offset> # protected far
2555 // ::= $4 <virtual-shift> <static-offset> # public near
2556 // ::= $5 <virtual-shift> <static-offset> # public far
2557 // <virtual-shift> ::= <vtordisp-shift> | <vtordispex-shift>
2558 // <vtordisp-shift> ::= <offset-to-vtordisp>
2559 // <vtordispex-shift> ::= <offset-to-vbptr> <vbase-offset-offset>
2560 // <offset-to-vtordisp>
2561 static void mangleThunkThisAdjustment(const CXXMethodDecl *MD,
2562 const ThisAdjustment &Adjustment,
2563 MicrosoftCXXNameMangler &Mangler,
2565 if (!Adjustment.Virtual.isEmpty()) {
2568 switch (MD->getAccess()) {
2570 llvm_unreachable("Unsupported access specifier");
2580 if (Adjustment.Virtual.Microsoft.VBPtrOffset) {
2581 Out << 'R' << AccessSpec;
2582 Mangler.mangleNumber(
2583 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VBPtrOffset));
2584 Mangler.mangleNumber(
2585 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VBOffsetOffset));
2586 Mangler.mangleNumber(
2587 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VtordispOffset));
2588 Mangler.mangleNumber(static_cast<uint32_t>(Adjustment.NonVirtual));
2591 Mangler.mangleNumber(
2592 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VtordispOffset));
2593 Mangler.mangleNumber(-static_cast<uint32_t>(Adjustment.NonVirtual));
2595 } else if (Adjustment.NonVirtual != 0) {
2596 switch (MD->getAccess()) {
2598 llvm_unreachable("Unsupported access specifier");
2608 Mangler.mangleNumber(-static_cast<uint32_t>(Adjustment.NonVirtual));
2610 switch (MD->getAccess()) {
2612 llvm_unreachable("Unsupported access specifier");
2626 MicrosoftMangleContextImpl::mangleVirtualMemPtrThunk(const CXXMethodDecl *MD,
2628 MicrosoftVTableContext *VTContext =
2629 cast<MicrosoftVTableContext>(getASTContext().getVTableContext());
2630 const MicrosoftVTableContext::MethodVFTableLocation &ML =
2631 VTContext->getMethodVFTableLocation(GlobalDecl(MD));
2633 msvc_hashing_ostream MHO(Out);
2634 MicrosoftCXXNameMangler Mangler(*this, MHO);
2635 Mangler.getStream() << "\01?";
2636 Mangler.mangleVirtualMemPtrThunk(MD, ML);
2639 void MicrosoftMangleContextImpl::mangleThunk(const CXXMethodDecl *MD,
2640 const ThunkInfo &Thunk,
2642 msvc_hashing_ostream MHO(Out);
2643 MicrosoftCXXNameMangler Mangler(*this, MHO);
2644 Mangler.getStream() << "\01?";
2645 Mangler.mangleName(MD);
2646 mangleThunkThisAdjustment(MD, Thunk.This, Mangler, MHO);
2647 if (!Thunk.Return.isEmpty())
2648 assert(Thunk.Method != nullptr &&
2649 "Thunk info should hold the overridee decl");
2651 const CXXMethodDecl *DeclForFPT = Thunk.Method ? Thunk.Method : MD;
2652 Mangler.mangleFunctionType(
2653 DeclForFPT->getType()->castAs<FunctionProtoType>(), MD);
2656 void MicrosoftMangleContextImpl::mangleCXXDtorThunk(
2657 const CXXDestructorDecl *DD, CXXDtorType Type,
2658 const ThisAdjustment &Adjustment, raw_ostream &Out) {
2659 // FIXME: Actually, the dtor thunk should be emitted for vector deleting
2660 // dtors rather than scalar deleting dtors. Just use the vector deleting dtor
2661 // mangling manually until we support both deleting dtor types.
2662 assert(Type == Dtor_Deleting);
2663 msvc_hashing_ostream MHO(Out);
2664 MicrosoftCXXNameMangler Mangler(*this, MHO, DD, Type);
2665 Mangler.getStream() << "\01??_E";
2666 Mangler.mangleName(DD->getParent());
2667 mangleThunkThisAdjustment(DD, Adjustment, Mangler, MHO);
2668 Mangler.mangleFunctionType(DD->getType()->castAs<FunctionProtoType>(), DD);
2671 void MicrosoftMangleContextImpl::mangleCXXVFTable(
2672 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
2674 // <mangled-name> ::= ?_7 <class-name> <storage-class>
2675 // <cvr-qualifiers> [<name>] @
2676 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
2677 // is always '6' for vftables.
2678 msvc_hashing_ostream MHO(Out);
2679 MicrosoftCXXNameMangler Mangler(*this, MHO);
2680 if (Derived->hasAttr<DLLImportAttr>())
2681 Mangler.getStream() << "\01??_S";
2683 Mangler.getStream() << "\01??_7";
2684 Mangler.mangleName(Derived);
2685 Mangler.getStream() << "6B"; // '6' for vftable, 'B' for const.
2686 for (const CXXRecordDecl *RD : BasePath)
2687 Mangler.mangleName(RD);
2688 Mangler.getStream() << '@';
2691 void MicrosoftMangleContextImpl::mangleCXXVBTable(
2692 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
2694 // <mangled-name> ::= ?_8 <class-name> <storage-class>
2695 // <cvr-qualifiers> [<name>] @
2696 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
2697 // is always '7' for vbtables.
2698 msvc_hashing_ostream MHO(Out);
2699 MicrosoftCXXNameMangler Mangler(*this, MHO);
2700 Mangler.getStream() << "\01??_8";
2701 Mangler.mangleName(Derived);
2702 Mangler.getStream() << "7B"; // '7' for vbtable, 'B' for const.
2703 for (const CXXRecordDecl *RD : BasePath)
2704 Mangler.mangleName(RD);
2705 Mangler.getStream() << '@';
2708 void MicrosoftMangleContextImpl::mangleCXXRTTI(QualType T, raw_ostream &Out) {
2709 msvc_hashing_ostream MHO(Out);
2710 MicrosoftCXXNameMangler Mangler(*this, MHO);
2711 Mangler.getStream() << "\01??_R0";
2712 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
2713 Mangler.getStream() << "@8";
2716 void MicrosoftMangleContextImpl::mangleCXXRTTIName(QualType T,
2718 MicrosoftCXXNameMangler Mangler(*this, Out);
2719 Mangler.getStream() << '.';
2720 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
2723 void MicrosoftMangleContextImpl::mangleCXXVirtualDisplacementMap(
2724 const CXXRecordDecl *SrcRD, const CXXRecordDecl *DstRD, raw_ostream &Out) {
2725 msvc_hashing_ostream MHO(Out);
2726 MicrosoftCXXNameMangler Mangler(*this, MHO);
2727 Mangler.getStream() << "\01??_K";
2728 Mangler.mangleName(SrcRD);
2729 Mangler.getStream() << "$C";
2730 Mangler.mangleName(DstRD);
2733 void MicrosoftMangleContextImpl::mangleCXXThrowInfo(QualType T, bool IsConst,
2736 uint32_t NumEntries,
2738 msvc_hashing_ostream MHO(Out);
2739 MicrosoftCXXNameMangler Mangler(*this, MHO);
2740 Mangler.getStream() << "_TI";
2742 Mangler.getStream() << 'C';
2744 Mangler.getStream() << 'V';
2746 Mangler.getStream() << 'U';
2747 Mangler.getStream() << NumEntries;
2748 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
2751 void MicrosoftMangleContextImpl::mangleCXXCatchableTypeArray(
2752 QualType T, uint32_t NumEntries, raw_ostream &Out) {
2753 msvc_hashing_ostream MHO(Out);
2754 MicrosoftCXXNameMangler Mangler(*this, MHO);
2755 Mangler.getStream() << "_CTA";
2756 Mangler.getStream() << NumEntries;
2757 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
2760 void MicrosoftMangleContextImpl::mangleCXXCatchableType(
2761 QualType T, const CXXConstructorDecl *CD, CXXCtorType CT, uint32_t Size,
2762 uint32_t NVOffset, int32_t VBPtrOffset, uint32_t VBIndex,
2764 MicrosoftCXXNameMangler Mangler(*this, Out);
2765 Mangler.getStream() << "_CT";
2767 llvm::SmallString<64> RTTIMangling;
2769 llvm::raw_svector_ostream Stream(RTTIMangling);
2770 msvc_hashing_ostream MHO(Stream);
2771 mangleCXXRTTI(T, MHO);
2773 Mangler.getStream() << RTTIMangling.substr(1);
2775 // VS2015 CTP6 omits the copy-constructor in the mangled name. This name is,
2776 // in fact, superfluous but I'm not sure the change was made consciously.
2777 llvm::SmallString<64> CopyCtorMangling;
2778 if (!getASTContext().getLangOpts().isCompatibleWithMSVC(
2779 LangOptions::MSVC2015) &&
2781 llvm::raw_svector_ostream Stream(CopyCtorMangling);
2782 msvc_hashing_ostream MHO(Stream);
2783 mangleCXXCtor(CD, CT, MHO);
2785 Mangler.getStream() << CopyCtorMangling.substr(1);
2787 Mangler.getStream() << Size;
2788 if (VBPtrOffset == -1) {
2790 Mangler.getStream() << NVOffset;
2793 Mangler.getStream() << NVOffset;
2794 Mangler.getStream() << VBPtrOffset;
2795 Mangler.getStream() << VBIndex;
2799 void MicrosoftMangleContextImpl::mangleCXXRTTIBaseClassDescriptor(
2800 const CXXRecordDecl *Derived, uint32_t NVOffset, int32_t VBPtrOffset,
2801 uint32_t VBTableOffset, uint32_t Flags, raw_ostream &Out) {
2802 msvc_hashing_ostream MHO(Out);
2803 MicrosoftCXXNameMangler Mangler(*this, MHO);
2804 Mangler.getStream() << "\01??_R1";
2805 Mangler.mangleNumber(NVOffset);
2806 Mangler.mangleNumber(VBPtrOffset);
2807 Mangler.mangleNumber(VBTableOffset);
2808 Mangler.mangleNumber(Flags);
2809 Mangler.mangleName(Derived);
2810 Mangler.getStream() << "8";
2813 void MicrosoftMangleContextImpl::mangleCXXRTTIBaseClassArray(
2814 const CXXRecordDecl *Derived, raw_ostream &Out) {
2815 msvc_hashing_ostream MHO(Out);
2816 MicrosoftCXXNameMangler Mangler(*this, MHO);
2817 Mangler.getStream() << "\01??_R2";
2818 Mangler.mangleName(Derived);
2819 Mangler.getStream() << "8";
2822 void MicrosoftMangleContextImpl::mangleCXXRTTIClassHierarchyDescriptor(
2823 const CXXRecordDecl *Derived, raw_ostream &Out) {
2824 msvc_hashing_ostream MHO(Out);
2825 MicrosoftCXXNameMangler Mangler(*this, MHO);
2826 Mangler.getStream() << "\01??_R3";
2827 Mangler.mangleName(Derived);
2828 Mangler.getStream() << "8";
2831 void MicrosoftMangleContextImpl::mangleCXXRTTICompleteObjectLocator(
2832 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
2834 // <mangled-name> ::= ?_R4 <class-name> <storage-class>
2835 // <cvr-qualifiers> [<name>] @
2836 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
2837 // is always '6' for vftables.
2838 llvm::SmallString<64> VFTableMangling;
2839 llvm::raw_svector_ostream Stream(VFTableMangling);
2840 mangleCXXVFTable(Derived, BasePath, Stream);
2842 if (VFTableMangling.startswith("\01??@")) {
2843 assert(VFTableMangling.endswith("@"));
2844 Out << VFTableMangling << "??_R4@";
2848 assert(VFTableMangling.startswith("\01??_7") ||
2849 VFTableMangling.startswith("\01??_S"));
2851 Out << "\01??_R4" << StringRef(VFTableMangling).drop_front(5);
2854 void MicrosoftMangleContextImpl::mangleSEHFilterExpression(
2855 const NamedDecl *EnclosingDecl, raw_ostream &Out) {
2856 msvc_hashing_ostream MHO(Out);
2857 MicrosoftCXXNameMangler Mangler(*this, MHO);
2858 // The function body is in the same comdat as the function with the handler,
2859 // so the numbering here doesn't have to be the same across TUs.
2861 // <mangled-name> ::= ?filt$ <filter-number> @0
2862 Mangler.getStream() << "\01?filt$" << SEHFilterIds[EnclosingDecl]++ << "@0@";
2863 Mangler.mangleName(EnclosingDecl);
2866 void MicrosoftMangleContextImpl::mangleSEHFinallyBlock(
2867 const NamedDecl *EnclosingDecl, raw_ostream &Out) {
2868 msvc_hashing_ostream MHO(Out);
2869 MicrosoftCXXNameMangler Mangler(*this, MHO);
2870 // The function body is in the same comdat as the function with the handler,
2871 // so the numbering here doesn't have to be the same across TUs.
2873 // <mangled-name> ::= ?fin$ <filter-number> @0
2874 Mangler.getStream() << "\01?fin$" << SEHFinallyIds[EnclosingDecl]++ << "@0@";
2875 Mangler.mangleName(EnclosingDecl);
2878 void MicrosoftMangleContextImpl::mangleTypeName(QualType T, raw_ostream &Out) {
2879 // This is just a made up unique string for the purposes of tbaa. undname
2880 // does *not* know how to demangle it.
2881 MicrosoftCXXNameMangler Mangler(*this, Out);
2882 Mangler.getStream() << '?';
2883 Mangler.mangleType(T, SourceRange());
2886 void MicrosoftMangleContextImpl::mangleCXXCtor(const CXXConstructorDecl *D,
2889 msvc_hashing_ostream MHO(Out);
2890 MicrosoftCXXNameMangler mangler(*this, MHO, D, Type);
2894 void MicrosoftMangleContextImpl::mangleCXXDtor(const CXXDestructorDecl *D,
2897 msvc_hashing_ostream MHO(Out);
2898 MicrosoftCXXNameMangler mangler(*this, MHO, D, Type);
2902 void MicrosoftMangleContextImpl::mangleReferenceTemporary(
2903 const VarDecl *VD, unsigned ManglingNumber, raw_ostream &Out) {
2904 msvc_hashing_ostream MHO(Out);
2905 MicrosoftCXXNameMangler Mangler(*this, MHO);
2907 Mangler.getStream() << "\01?$RT" << ManglingNumber << '@';
2908 Mangler.mangle(VD, "");
2911 void MicrosoftMangleContextImpl::mangleThreadSafeStaticGuardVariable(
2912 const VarDecl *VD, unsigned GuardNum, raw_ostream &Out) {
2913 msvc_hashing_ostream MHO(Out);
2914 MicrosoftCXXNameMangler Mangler(*this, MHO);
2916 Mangler.getStream() << "\01?$TSS" << GuardNum << '@';
2917 Mangler.mangleNestedName(VD);
2918 Mangler.getStream() << "@4HA";
2921 void MicrosoftMangleContextImpl::mangleStaticGuardVariable(const VarDecl *VD,
2923 // <guard-name> ::= ?_B <postfix> @5 <scope-depth>
2924 // ::= ?__J <postfix> @5 <scope-depth>
2925 // ::= ?$S <guard-num> @ <postfix> @4IA
2927 // The first mangling is what MSVC uses to guard static locals in inline
2928 // functions. It uses a different mangling in external functions to support
2929 // guarding more than 32 variables. MSVC rejects inline functions with more
2930 // than 32 static locals. We don't fully implement the second mangling
2931 // because those guards are not externally visible, and instead use LLVM's
2932 // default renaming when creating a new guard variable.
2933 msvc_hashing_ostream MHO(Out);
2934 MicrosoftCXXNameMangler Mangler(*this, MHO);
2936 bool Visible = VD->isExternallyVisible();
2938 Mangler.getStream() << (VD->getTLSKind() ? "\01??__J" : "\01??_B");
2940 Mangler.getStream() << "\01?$S1@";
2942 unsigned ScopeDepth = 0;
2943 if (Visible && !getNextDiscriminator(VD, ScopeDepth))
2944 // If we do not have a discriminator and are emitting a guard variable for
2945 // use at global scope, then mangling the nested name will not be enough to
2946 // remove ambiguities.
2947 Mangler.mangle(VD, "");
2949 Mangler.mangleNestedName(VD);
2950 Mangler.getStream() << (Visible ? "@5" : "@4IA");
2952 Mangler.mangleNumber(ScopeDepth);
2955 void MicrosoftMangleContextImpl::mangleInitFiniStub(const VarDecl *D,
2958 msvc_hashing_ostream MHO(Out);
2959 MicrosoftCXXNameMangler Mangler(*this, MHO);
2960 Mangler.getStream() << "\01??__" << CharCode;
2961 Mangler.mangleName(D);
2962 if (D->isStaticDataMember()) {
2963 Mangler.mangleVariableEncoding(D);
2964 Mangler.getStream() << '@';
2966 // This is the function class mangling. These stubs are global, non-variadic,
2967 // cdecl functions that return void and take no args.
2968 Mangler.getStream() << "YAXXZ";
2971 void MicrosoftMangleContextImpl::mangleDynamicInitializer(const VarDecl *D,
2973 // <initializer-name> ::= ?__E <name> YAXXZ
2974 mangleInitFiniStub(D, 'E', Out);
2978 MicrosoftMangleContextImpl::mangleDynamicAtExitDestructor(const VarDecl *D,
2980 // <destructor-name> ::= ?__F <name> YAXXZ
2981 mangleInitFiniStub(D, 'F', Out);
2984 void MicrosoftMangleContextImpl::mangleStringLiteral(const StringLiteral *SL,
2986 // <char-type> ::= 0 # char
2988 // ::= ??? # char16_t/char32_t will need a mangling too...
2990 // <literal-length> ::= <non-negative integer> # the length of the literal
2992 // <encoded-crc> ::= <hex digit>+ @ # crc of the literal including
2993 // # null-terminator
2995 // <encoded-string> ::= <simple character> # uninteresting character
2996 // ::= '?$' <hex digit> <hex digit> # these two nibbles
2997 // # encode the byte for the
2999 // ::= '?' [a-z] # \xe1 - \xfa
3000 // ::= '?' [A-Z] # \xc1 - \xda
3001 // ::= '?' [0-9] # [,/\:. \n\t'-]
3003 // <literal> ::= '??_C@_' <char-type> <literal-length> <encoded-crc>
3004 // <encoded-string> '@'
3005 MicrosoftCXXNameMangler Mangler(*this, Out);
3006 Mangler.getStream() << "\01??_C@_";
3008 // <char-type>: The "kind" of string literal is encoded into the mangled name.
3010 Mangler.getStream() << '1';
3012 Mangler.getStream() << '0';
3014 // <literal-length>: The next part of the mangled name consists of the length
3016 // The StringLiteral does not consider the NUL terminator byte(s) but the
3018 // N.B. The length is in terms of bytes, not characters.
3019 Mangler.mangleNumber(SL->getByteLength() + SL->getCharByteWidth());
3021 auto GetLittleEndianByte = [&SL](unsigned Index) {
3022 unsigned CharByteWidth = SL->getCharByteWidth();
3023 uint32_t CodeUnit = SL->getCodeUnit(Index / CharByteWidth);
3024 unsigned OffsetInCodeUnit = Index % CharByteWidth;
3025 return static_cast<char>((CodeUnit >> (8 * OffsetInCodeUnit)) & 0xff);
3028 auto GetBigEndianByte = [&SL](unsigned Index) {
3029 unsigned CharByteWidth = SL->getCharByteWidth();
3030 uint32_t CodeUnit = SL->getCodeUnit(Index / CharByteWidth);
3031 unsigned OffsetInCodeUnit = (CharByteWidth - 1) - (Index % CharByteWidth);
3032 return static_cast<char>((CodeUnit >> (8 * OffsetInCodeUnit)) & 0xff);
3035 // CRC all the bytes of the StringLiteral.
3037 for (unsigned I = 0, E = SL->getByteLength(); I != E; ++I)
3038 JC.update(GetLittleEndianByte(I));
3040 // The NUL terminator byte(s) were not present earlier,
3041 // we need to manually process those bytes into the CRC.
3042 for (unsigned NullTerminator = 0; NullTerminator < SL->getCharByteWidth();
3046 // <encoded-crc>: The CRC is encoded utilizing the standard number mangling
3048 Mangler.mangleNumber(JC.getCRC());
3050 // <encoded-string>: The mangled name also contains the first 32 _characters_
3051 // (including null-terminator bytes) of the StringLiteral.
3052 // Each character is encoded by splitting them into bytes and then encoding
3053 // the constituent bytes.
3054 auto MangleByte = [&Mangler](char Byte) {
3055 // There are five different manglings for characters:
3056 // - [a-zA-Z0-9_$]: A one-to-one mapping.
3057 // - ?[a-z]: The range from \xe1 to \xfa.
3058 // - ?[A-Z]: The range from \xc1 to \xda.
3059 // - ?[0-9]: The set of [,/\:. \n\t'-].
3060 // - ?$XX: A fallback which maps nibbles.
3061 if (isIdentifierBody(Byte, /*AllowDollar=*/true)) {
3062 Mangler.getStream() << Byte;
3063 } else if (isLetter(Byte & 0x7f)) {
3064 Mangler.getStream() << '?' << static_cast<char>(Byte & 0x7f);
3066 const char SpecialChars[] = {',', '/', '\\', ':', '.',
3067 ' ', '\n', '\t', '\'', '-'};
3069 std::find(std::begin(SpecialChars), std::end(SpecialChars), Byte);
3070 if (Pos != std::end(SpecialChars)) {
3071 Mangler.getStream() << '?' << (Pos - std::begin(SpecialChars));
3073 Mangler.getStream() << "?$";
3074 Mangler.getStream() << static_cast<char>('A' + ((Byte >> 4) & 0xf));
3075 Mangler.getStream() << static_cast<char>('A' + (Byte & 0xf));
3080 // Enforce our 32 character max.
3081 unsigned NumCharsToMangle = std::min(32U, SL->getLength());
3082 for (unsigned I = 0, E = NumCharsToMangle * SL->getCharByteWidth(); I != E;
3085 MangleByte(GetBigEndianByte(I));
3087 MangleByte(GetLittleEndianByte(I));
3089 // Encode the NUL terminator if there is room.
3090 if (NumCharsToMangle < 32)
3091 for (unsigned NullTerminator = 0; NullTerminator < SL->getCharByteWidth();
3095 Mangler.getStream() << '@';
3098 MicrosoftMangleContext *
3099 MicrosoftMangleContext::create(ASTContext &Context, DiagnosticsEngine &Diags) {
3100 return new MicrosoftMangleContextImpl(Context, Diags);