1 //===--- MicrosoftMangle.cpp - Microsoft Visual C++ Name Mangling ---------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This provides C++ name mangling targeting the Microsoft Visual C++ ABI.
11 //===----------------------------------------------------------------------===//
13 #include "clang/AST/Mangle.h"
14 #include "clang/AST/ASTContext.h"
15 #include "clang/AST/Attr.h"
16 #include "clang/AST/CXXInheritance.h"
17 #include "clang/AST/CharUnits.h"
18 #include "clang/AST/Decl.h"
19 #include "clang/AST/DeclCXX.h"
20 #include "clang/AST/DeclObjC.h"
21 #include "clang/AST/DeclOpenMP.h"
22 #include "clang/AST/DeclTemplate.h"
23 #include "clang/AST/Expr.h"
24 #include "clang/AST/ExprCXX.h"
25 #include "clang/AST/VTableBuilder.h"
26 #include "clang/Basic/ABI.h"
27 #include "clang/Basic/DiagnosticOptions.h"
28 #include "clang/Basic/TargetInfo.h"
29 #include "llvm/ADT/StringExtras.h"
30 #include "llvm/Support/JamCRC.h"
31 #include "llvm/Support/xxhash.h"
32 #include "llvm/Support/MD5.h"
33 #include "llvm/Support/MathExtras.h"
34 #include "llvm/Support/StringSaver.h"
36 using namespace clang;
40 struct msvc_hashing_ostream : public llvm::raw_svector_ostream {
42 llvm::SmallString<64> Buffer;
44 msvc_hashing_ostream(raw_ostream &OS)
45 : llvm::raw_svector_ostream(Buffer), OS(OS) {}
46 ~msvc_hashing_ostream() override {
47 StringRef MangledName = str();
48 bool StartsWithEscape = MangledName.startswith("\01");
50 MangledName = MangledName.drop_front(1);
51 if (MangledName.size() <= 4096) {
57 llvm::MD5::MD5Result Hash;
58 Hasher.update(MangledName);
61 SmallString<32> HexString;
62 llvm::MD5::stringifyResult(Hash, HexString);
66 OS << "??@" << HexString << '@';
70 static const DeclContext *
71 getLambdaDefaultArgumentDeclContext(const Decl *D) {
72 if (const auto *RD = dyn_cast<CXXRecordDecl>(D))
74 if (const auto *Parm =
75 dyn_cast_or_null<ParmVarDecl>(RD->getLambdaContextDecl()))
76 return Parm->getDeclContext();
80 /// Retrieve the declaration context that should be used when mangling
81 /// the given declaration.
82 static const DeclContext *getEffectiveDeclContext(const Decl *D) {
83 // The ABI assumes that lambda closure types that occur within
84 // default arguments live in the context of the function. However, due to
85 // the way in which Clang parses and creates function declarations, this is
86 // not the case: the lambda closure type ends up living in the context
87 // where the function itself resides, because the function declaration itself
88 // had not yet been created. Fix the context here.
89 if (const auto *LDADC = getLambdaDefaultArgumentDeclContext(D))
92 // Perform the same check for block literals.
93 if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
94 if (ParmVarDecl *ContextParam =
95 dyn_cast_or_null<ParmVarDecl>(BD->getBlockManglingContextDecl()))
96 return ContextParam->getDeclContext();
99 const DeclContext *DC = D->getDeclContext();
100 if (isa<CapturedDecl>(DC) || isa<OMPDeclareReductionDecl>(DC) ||
101 isa<OMPDeclareMapperDecl>(DC)) {
102 return getEffectiveDeclContext(cast<Decl>(DC));
105 return DC->getRedeclContext();
108 static const DeclContext *getEffectiveParentContext(const DeclContext *DC) {
109 return getEffectiveDeclContext(cast<Decl>(DC));
112 static const FunctionDecl *getStructor(const NamedDecl *ND) {
113 if (const auto *FTD = dyn_cast<FunctionTemplateDecl>(ND))
114 return FTD->getTemplatedDecl()->getCanonicalDecl();
116 const auto *FD = cast<FunctionDecl>(ND);
117 if (const auto *FTD = FD->getPrimaryTemplate())
118 return FTD->getTemplatedDecl()->getCanonicalDecl();
120 return FD->getCanonicalDecl();
123 /// MicrosoftMangleContextImpl - Overrides the default MangleContext for the
124 /// Microsoft Visual C++ ABI.
125 class MicrosoftMangleContextImpl : public MicrosoftMangleContext {
126 typedef std::pair<const DeclContext *, IdentifierInfo *> DiscriminatorKeyTy;
127 llvm::DenseMap<DiscriminatorKeyTy, unsigned> Discriminator;
128 llvm::DenseMap<const NamedDecl *, unsigned> Uniquifier;
129 llvm::DenseMap<const CXXRecordDecl *, unsigned> LambdaIds;
130 llvm::DenseMap<const NamedDecl *, unsigned> SEHFilterIds;
131 llvm::DenseMap<const NamedDecl *, unsigned> SEHFinallyIds;
132 SmallString<16> AnonymousNamespaceHash;
135 MicrosoftMangleContextImpl(ASTContext &Context, DiagnosticsEngine &Diags);
136 bool shouldMangleCXXName(const NamedDecl *D) override;
137 bool shouldMangleStringLiteral(const StringLiteral *SL) override;
138 void mangleCXXName(const NamedDecl *D, raw_ostream &Out) override;
139 void mangleVirtualMemPtrThunk(const CXXMethodDecl *MD,
140 const MethodVFTableLocation &ML,
141 raw_ostream &Out) override;
142 void mangleThunk(const CXXMethodDecl *MD, const ThunkInfo &Thunk,
143 raw_ostream &) override;
144 void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type,
145 const ThisAdjustment &ThisAdjustment,
146 raw_ostream &) override;
147 void mangleCXXVFTable(const CXXRecordDecl *Derived,
148 ArrayRef<const CXXRecordDecl *> BasePath,
149 raw_ostream &Out) override;
150 void mangleCXXVBTable(const CXXRecordDecl *Derived,
151 ArrayRef<const CXXRecordDecl *> BasePath,
152 raw_ostream &Out) override;
153 void mangleCXXVirtualDisplacementMap(const CXXRecordDecl *SrcRD,
154 const CXXRecordDecl *DstRD,
155 raw_ostream &Out) override;
156 void mangleCXXThrowInfo(QualType T, bool IsConst, bool IsVolatile,
157 bool IsUnaligned, uint32_t NumEntries,
158 raw_ostream &Out) override;
159 void mangleCXXCatchableTypeArray(QualType T, uint32_t NumEntries,
160 raw_ostream &Out) override;
161 void mangleCXXCatchableType(QualType T, const CXXConstructorDecl *CD,
162 CXXCtorType CT, uint32_t Size, uint32_t NVOffset,
163 int32_t VBPtrOffset, uint32_t VBIndex,
164 raw_ostream &Out) override;
165 void mangleCXXRTTI(QualType T, raw_ostream &Out) override;
166 void mangleCXXRTTIName(QualType T, raw_ostream &Out) override;
167 void mangleCXXRTTIBaseClassDescriptor(const CXXRecordDecl *Derived,
168 uint32_t NVOffset, int32_t VBPtrOffset,
169 uint32_t VBTableOffset, uint32_t Flags,
170 raw_ostream &Out) override;
171 void mangleCXXRTTIBaseClassArray(const CXXRecordDecl *Derived,
172 raw_ostream &Out) override;
173 void mangleCXXRTTIClassHierarchyDescriptor(const CXXRecordDecl *Derived,
174 raw_ostream &Out) override;
176 mangleCXXRTTICompleteObjectLocator(const CXXRecordDecl *Derived,
177 ArrayRef<const CXXRecordDecl *> BasePath,
178 raw_ostream &Out) override;
179 void mangleTypeName(QualType T, raw_ostream &) override;
180 void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type,
181 raw_ostream &) override;
182 void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type,
183 raw_ostream &) override;
184 void mangleReferenceTemporary(const VarDecl *, unsigned ManglingNumber,
185 raw_ostream &) override;
186 void mangleStaticGuardVariable(const VarDecl *D, raw_ostream &Out) override;
187 void mangleThreadSafeStaticGuardVariable(const VarDecl *D, unsigned GuardNum,
188 raw_ostream &Out) override;
189 void mangleDynamicInitializer(const VarDecl *D, raw_ostream &Out) override;
190 void mangleDynamicAtExitDestructor(const VarDecl *D,
191 raw_ostream &Out) override;
192 void mangleSEHFilterExpression(const NamedDecl *EnclosingDecl,
193 raw_ostream &Out) override;
194 void mangleSEHFinallyBlock(const NamedDecl *EnclosingDecl,
195 raw_ostream &Out) override;
196 void mangleStringLiteral(const StringLiteral *SL, raw_ostream &Out) override;
197 bool getNextDiscriminator(const NamedDecl *ND, unsigned &disc) {
198 const DeclContext *DC = getEffectiveDeclContext(ND);
199 if (!DC->isFunctionOrMethod())
202 // Lambda closure types are already numbered, give out a phony number so
203 // that they demangle nicely.
204 if (const auto *RD = dyn_cast<CXXRecordDecl>(ND)) {
205 if (RD->isLambda()) {
211 // Use the canonical number for externally visible decls.
212 if (ND->isExternallyVisible()) {
213 disc = getASTContext().getManglingNumber(ND);
217 // Anonymous tags are already numbered.
218 if (const TagDecl *Tag = dyn_cast<TagDecl>(ND)) {
219 if (!Tag->hasNameForLinkage() &&
220 !getASTContext().getDeclaratorForUnnamedTagDecl(Tag) &&
221 !getASTContext().getTypedefNameForUnnamedTagDecl(Tag))
225 // Make up a reasonable number for internal decls.
226 unsigned &discriminator = Uniquifier[ND];
228 discriminator = ++Discriminator[std::make_pair(DC, ND->getIdentifier())];
229 disc = discriminator + 1;
233 unsigned getLambdaId(const CXXRecordDecl *RD) {
234 assert(RD->isLambda() && "RD must be a lambda!");
235 assert(!RD->isExternallyVisible() && "RD must not be visible!");
236 assert(RD->getLambdaManglingNumber() == 0 &&
237 "RD must not have a mangling number!");
238 std::pair<llvm::DenseMap<const CXXRecordDecl *, unsigned>::iterator, bool>
239 Result = LambdaIds.insert(std::make_pair(RD, LambdaIds.size()));
240 return Result.first->second;
243 /// Return a character sequence that is (somewhat) unique to the TU suitable
244 /// for mangling anonymous namespaces.
245 StringRef getAnonymousNamespaceHash() const {
246 return AnonymousNamespaceHash;
250 void mangleInitFiniStub(const VarDecl *D, char CharCode, raw_ostream &Out);
253 /// MicrosoftCXXNameMangler - Manage the mangling of a single name for the
254 /// Microsoft Visual C++ ABI.
255 class MicrosoftCXXNameMangler {
256 MicrosoftMangleContextImpl &Context;
259 /// The "structor" is the top-level declaration being mangled, if
260 /// that's not a template specialization; otherwise it's the pattern
261 /// for that specialization.
262 const NamedDecl *Structor;
263 unsigned StructorType;
265 typedef llvm::SmallVector<std::string, 10> BackRefVec;
266 BackRefVec NameBackReferences;
268 typedef llvm::DenseMap<const void *, unsigned> ArgBackRefMap;
269 ArgBackRefMap FunArgBackReferences;
270 ArgBackRefMap TemplateArgBackReferences;
272 typedef llvm::DenseMap<const void *, StringRef> TemplateArgStringMap;
273 TemplateArgStringMap TemplateArgStrings;
274 llvm::StringSaver TemplateArgStringStorage;
275 llvm::BumpPtrAllocator TemplateArgStringStorageAlloc;
277 typedef std::set<std::pair<int, bool>> PassObjectSizeArgsSet;
278 PassObjectSizeArgsSet PassObjectSizeArgs;
280 ASTContext &getASTContext() const { return Context.getASTContext(); }
282 // FIXME: If we add support for __ptr32/64 qualifiers, then we should push
283 // this check into mangleQualifiers().
284 const bool PointersAre64Bit;
287 enum QualifierMangleMode { QMM_Drop, QMM_Mangle, QMM_Escape, QMM_Result };
289 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_)
290 : Context(C), Out(Out_), Structor(nullptr), StructorType(-1),
291 TemplateArgStringStorage(TemplateArgStringStorageAlloc),
292 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
295 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_,
296 const CXXConstructorDecl *D, CXXCtorType Type)
297 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
298 TemplateArgStringStorage(TemplateArgStringStorageAlloc),
299 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
302 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_,
303 const CXXDestructorDecl *D, CXXDtorType Type)
304 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
305 TemplateArgStringStorage(TemplateArgStringStorageAlloc),
306 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
309 raw_ostream &getStream() const { return Out; }
311 void mangle(const NamedDecl *D, StringRef Prefix = "?");
312 void mangleName(const NamedDecl *ND);
313 void mangleFunctionEncoding(const FunctionDecl *FD, bool ShouldMangle);
314 void mangleVariableEncoding(const VarDecl *VD);
315 void mangleMemberDataPointer(const CXXRecordDecl *RD, const ValueDecl *VD);
316 void mangleMemberFunctionPointer(const CXXRecordDecl *RD,
317 const CXXMethodDecl *MD);
318 void mangleVirtualMemPtrThunk(const CXXMethodDecl *MD,
319 const MethodVFTableLocation &ML);
320 void mangleNumber(int64_t Number);
321 void mangleTagTypeKind(TagTypeKind TK);
322 void mangleArtificialTagType(TagTypeKind TK, StringRef UnqualifiedName,
323 ArrayRef<StringRef> NestedNames = None);
324 void mangleAddressSpaceType(QualType T, Qualifiers Quals, SourceRange Range);
325 void mangleType(QualType T, SourceRange Range,
326 QualifierMangleMode QMM = QMM_Mangle);
327 void mangleFunctionType(const FunctionType *T,
328 const FunctionDecl *D = nullptr,
329 bool ForceThisQuals = false,
330 bool MangleExceptionSpec = true);
331 void mangleNestedName(const NamedDecl *ND);
334 bool isStructorDecl(const NamedDecl *ND) const {
335 return ND == Structor || getStructor(ND) == Structor;
338 void mangleUnqualifiedName(const NamedDecl *ND) {
339 mangleUnqualifiedName(ND, ND->getDeclName());
341 void mangleUnqualifiedName(const NamedDecl *ND, DeclarationName Name);
342 void mangleSourceName(StringRef Name);
343 void mangleOperatorName(OverloadedOperatorKind OO, SourceLocation Loc);
344 void mangleCXXDtorType(CXXDtorType T);
345 void mangleQualifiers(Qualifiers Quals, bool IsMember);
346 void mangleRefQualifier(RefQualifierKind RefQualifier);
347 void manglePointerCVQualifiers(Qualifiers Quals);
348 void manglePointerExtQualifiers(Qualifiers Quals, QualType PointeeType);
350 void mangleUnscopedTemplateName(const TemplateDecl *ND);
352 mangleTemplateInstantiationName(const TemplateDecl *TD,
353 const TemplateArgumentList &TemplateArgs);
354 void mangleObjCMethodName(const ObjCMethodDecl *MD);
356 void mangleFunctionArgumentType(QualType T, SourceRange Range);
357 void manglePassObjectSizeArg(const PassObjectSizeAttr *POSA);
359 bool isArtificialTagType(QualType T) const;
361 // Declare manglers for every type class.
362 #define ABSTRACT_TYPE(CLASS, PARENT)
363 #define NON_CANONICAL_TYPE(CLASS, PARENT)
364 #define TYPE(CLASS, PARENT) void mangleType(const CLASS##Type *T, \
367 #include "clang/AST/TypeNodes.def"
369 #undef NON_CANONICAL_TYPE
372 void mangleType(const TagDecl *TD);
373 void mangleDecayedArrayType(const ArrayType *T);
374 void mangleArrayType(const ArrayType *T);
375 void mangleFunctionClass(const FunctionDecl *FD);
376 void mangleCallingConvention(CallingConv CC);
377 void mangleCallingConvention(const FunctionType *T);
378 void mangleIntegerLiteral(const llvm::APSInt &Number, bool IsBoolean);
379 void mangleExpression(const Expr *E);
380 void mangleThrowSpecification(const FunctionProtoType *T);
382 void mangleTemplateArgs(const TemplateDecl *TD,
383 const TemplateArgumentList &TemplateArgs);
384 void mangleTemplateArg(const TemplateDecl *TD, const TemplateArgument &TA,
385 const NamedDecl *Parm);
387 void mangleObjCProtocol(const ObjCProtocolDecl *PD);
388 void mangleObjCLifetime(const QualType T, Qualifiers Quals,
390 void mangleObjCKindOfType(const ObjCObjectType *T, Qualifiers Quals,
395 MicrosoftMangleContextImpl::MicrosoftMangleContextImpl(ASTContext &Context,
396 DiagnosticsEngine &Diags)
397 : MicrosoftMangleContext(Context, Diags) {
398 // To mangle anonymous namespaces, hash the path to the main source file. The
399 // path should be whatever (probably relative) path was passed on the command
400 // line. The goal is for the compiler to produce the same output regardless of
401 // working directory, so use the uncanonicalized relative path.
403 // It's important to make the mangled names unique because, when CodeView
404 // debug info is in use, the debugger uses mangled type names to distinguish
405 // between otherwise identically named types in anonymous namespaces.
407 // These symbols are always internal, so there is no need for the hash to
408 // match what MSVC produces. For the same reason, clang is free to change the
409 // hash at any time without breaking compatibility with old versions of clang.
410 // The generated names are intended to look similar to what MSVC generates,
411 // which are something like "?A0x01234567@".
412 SourceManager &SM = Context.getSourceManager();
413 if (const FileEntry *FE = SM.getFileEntryForID(SM.getMainFileID())) {
414 // Truncate the hash so we get 8 characters of hexadecimal.
415 uint32_t TruncatedHash = uint32_t(xxHash64(FE->getName()));
416 AnonymousNamespaceHash = llvm::utohexstr(TruncatedHash);
418 // If we don't have a path to the main file, we'll just use 0.
419 AnonymousNamespaceHash = "0";
423 bool MicrosoftMangleContextImpl::shouldMangleCXXName(const NamedDecl *D) {
424 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
425 LanguageLinkage L = FD->getLanguageLinkage();
426 // Overloadable functions need mangling.
427 if (FD->hasAttr<OverloadableAttr>())
430 // The ABI expects that we would never mangle "typical" user-defined entry
431 // points regardless of visibility or freestanding-ness.
433 // N.B. This is distinct from asking about "main". "main" has a lot of
434 // special rules associated with it in the standard while these
435 // user-defined entry points are outside of the purview of the standard.
436 // For example, there can be only one definition for "main" in a standards
437 // compliant program; however nothing forbids the existence of wmain and
438 // WinMain in the same translation unit.
439 if (FD->isMSVCRTEntryPoint())
442 // C++ functions and those whose names are not a simple identifier need
444 if (!FD->getDeclName().isIdentifier() || L == CXXLanguageLinkage)
447 // C functions are not mangled.
448 if (L == CLanguageLinkage)
452 // Otherwise, no mangling is done outside C++ mode.
453 if (!getASTContext().getLangOpts().CPlusPlus)
456 const VarDecl *VD = dyn_cast<VarDecl>(D);
457 if (VD && !isa<DecompositionDecl>(D)) {
458 // C variables are not mangled.
462 // Variables at global scope with non-internal linkage are not mangled.
463 const DeclContext *DC = getEffectiveDeclContext(D);
464 // Check for extern variable declared locally.
465 if (DC->isFunctionOrMethod() && D->hasLinkage())
466 while (!DC->isNamespace() && !DC->isTranslationUnit())
467 DC = getEffectiveParentContext(DC);
469 if (DC->isTranslationUnit() && D->getFormalLinkage() == InternalLinkage &&
470 !isa<VarTemplateSpecializationDecl>(D) &&
471 D->getIdentifier() != nullptr)
479 MicrosoftMangleContextImpl::shouldMangleStringLiteral(const StringLiteral *SL) {
483 void MicrosoftCXXNameMangler::mangle(const NamedDecl *D, StringRef Prefix) {
484 // MSVC doesn't mangle C++ names the same way it mangles extern "C" names.
485 // Therefore it's really important that we don't decorate the
486 // name with leading underscores or leading/trailing at signs. So, by
487 // default, we emit an asm marker at the start so we get the name right.
488 // Callers can override this with a custom prefix.
490 // <mangled-name> ::= ? <name> <type-encoding>
493 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
494 mangleFunctionEncoding(FD, Context.shouldMangleDeclName(FD));
495 else if (const VarDecl *VD = dyn_cast<VarDecl>(D))
496 mangleVariableEncoding(VD);
498 llvm_unreachable("Tried to mangle unexpected NamedDecl!");
501 void MicrosoftCXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD,
503 // <type-encoding> ::= <function-class> <function-type>
505 // Since MSVC operates on the type as written and not the canonical type, it
506 // actually matters which decl we have here. MSVC appears to choose the
507 // first, since it is most likely to be the declaration in a header file.
508 FD = FD->getFirstDecl();
510 // We should never ever see a FunctionNoProtoType at this point.
511 // We don't even know how to mangle their types anyway :).
512 const FunctionProtoType *FT = FD->getType()->castAs<FunctionProtoType>();
514 // extern "C" functions can hold entities that must be mangled.
515 // As it stands, these functions still need to get expressed in the full
516 // external name. They have their class and type omitted, replaced with '9'.
518 // We would like to mangle all extern "C" functions using this additional
519 // component but this would break compatibility with MSVC's behavior.
520 // Instead, do this when we know that compatibility isn't important (in
521 // other words, when it is an overloaded extern "C" function).
522 if (FD->isExternC() && FD->hasAttr<OverloadableAttr>())
525 mangleFunctionClass(FD);
527 mangleFunctionType(FT, FD, false, false);
533 void MicrosoftCXXNameMangler::mangleVariableEncoding(const VarDecl *VD) {
534 // <type-encoding> ::= <storage-class> <variable-type>
535 // <storage-class> ::= 0 # private static member
536 // ::= 1 # protected static member
537 // ::= 2 # public static member
539 // ::= 4 # static local
541 // The first character in the encoding (after the name) is the storage class.
542 if (VD->isStaticDataMember()) {
543 // If it's a static member, it also encodes the access level.
544 switch (VD->getAccess()) {
546 case AS_private: Out << '0'; break;
547 case AS_protected: Out << '1'; break;
548 case AS_public: Out << '2'; break;
551 else if (!VD->isStaticLocal())
555 // Now mangle the type.
556 // <variable-type> ::= <type> <cvr-qualifiers>
557 // ::= <type> <pointee-cvr-qualifiers> # pointers, references
558 // Pointers and references are odd. The type of 'int * const foo;' gets
559 // mangled as 'QAHA' instead of 'PAHB', for example.
560 SourceRange SR = VD->getSourceRange();
561 QualType Ty = VD->getType();
562 if (Ty->isPointerType() || Ty->isReferenceType() ||
563 Ty->isMemberPointerType()) {
564 mangleType(Ty, SR, QMM_Drop);
565 manglePointerExtQualifiers(
566 Ty.getDesugaredType(getASTContext()).getLocalQualifiers(), QualType());
567 if (const MemberPointerType *MPT = Ty->getAs<MemberPointerType>()) {
568 mangleQualifiers(MPT->getPointeeType().getQualifiers(), true);
569 // Member pointers are suffixed with a back reference to the member
570 // pointer's class name.
571 mangleName(MPT->getClass()->getAsCXXRecordDecl());
573 mangleQualifiers(Ty->getPointeeType().getQualifiers(), false);
574 } else if (const ArrayType *AT = getASTContext().getAsArrayType(Ty)) {
575 // Global arrays are funny, too.
576 mangleDecayedArrayType(AT);
577 if (AT->getElementType()->isArrayType())
580 mangleQualifiers(Ty.getQualifiers(), false);
582 mangleType(Ty, SR, QMM_Drop);
583 mangleQualifiers(Ty.getQualifiers(), false);
587 void MicrosoftCXXNameMangler::mangleMemberDataPointer(const CXXRecordDecl *RD,
588 const ValueDecl *VD) {
589 // <member-data-pointer> ::= <integer-literal>
590 // ::= $F <number> <number>
591 // ::= $G <number> <number> <number>
594 int64_t VBTableOffset;
595 MSInheritanceAttr::Spelling IM = RD->getMSInheritanceModel();
597 FieldOffset = getASTContext().getFieldOffset(VD);
598 assert(FieldOffset % getASTContext().getCharWidth() == 0 &&
599 "cannot take address of bitfield");
600 FieldOffset /= getASTContext().getCharWidth();
604 if (IM == MSInheritanceAttr::Keyword_virtual_inheritance)
605 FieldOffset -= getASTContext().getOffsetOfBaseWithVBPtr(RD).getQuantity();
607 FieldOffset = RD->nullFieldOffsetIsZero() ? 0 : -1;
614 case MSInheritanceAttr::Keyword_single_inheritance: Code = '0'; break;
615 case MSInheritanceAttr::Keyword_multiple_inheritance: Code = '0'; break;
616 case MSInheritanceAttr::Keyword_virtual_inheritance: Code = 'F'; break;
617 case MSInheritanceAttr::Keyword_unspecified_inheritance: Code = 'G'; break;
622 mangleNumber(FieldOffset);
624 // The C++ standard doesn't allow base-to-derived member pointer conversions
625 // in template parameter contexts, so the vbptr offset of data member pointers
627 if (MSInheritanceAttr::hasVBPtrOffsetField(IM))
629 if (MSInheritanceAttr::hasVBTableOffsetField(IM))
630 mangleNumber(VBTableOffset);
634 MicrosoftCXXNameMangler::mangleMemberFunctionPointer(const CXXRecordDecl *RD,
635 const CXXMethodDecl *MD) {
636 // <member-function-pointer> ::= $1? <name>
637 // ::= $H? <name> <number>
638 // ::= $I? <name> <number> <number>
639 // ::= $J? <name> <number> <number> <number>
641 MSInheritanceAttr::Spelling IM = RD->getMSInheritanceModel();
645 case MSInheritanceAttr::Keyword_single_inheritance: Code = '1'; break;
646 case MSInheritanceAttr::Keyword_multiple_inheritance: Code = 'H'; break;
647 case MSInheritanceAttr::Keyword_virtual_inheritance: Code = 'I'; break;
648 case MSInheritanceAttr::Keyword_unspecified_inheritance: Code = 'J'; break;
651 // If non-virtual, mangle the name. If virtual, mangle as a virtual memptr
653 uint64_t NVOffset = 0;
654 uint64_t VBTableOffset = 0;
655 uint64_t VBPtrOffset = 0;
657 Out << '$' << Code << '?';
658 if (MD->isVirtual()) {
659 MicrosoftVTableContext *VTContext =
660 cast<MicrosoftVTableContext>(getASTContext().getVTableContext());
661 MethodVFTableLocation ML =
662 VTContext->getMethodVFTableLocation(GlobalDecl(MD));
663 mangleVirtualMemPtrThunk(MD, ML);
664 NVOffset = ML.VFPtrOffset.getQuantity();
665 VBTableOffset = ML.VBTableIndex * 4;
667 const ASTRecordLayout &Layout = getASTContext().getASTRecordLayout(RD);
668 VBPtrOffset = Layout.getVBPtrOffset().getQuantity();
672 mangleFunctionEncoding(MD, /*ShouldMangle=*/true);
675 if (VBTableOffset == 0 &&
676 IM == MSInheritanceAttr::Keyword_virtual_inheritance)
677 NVOffset -= getASTContext().getOffsetOfBaseWithVBPtr(RD).getQuantity();
679 // Null single inheritance member functions are encoded as a simple nullptr.
680 if (IM == MSInheritanceAttr::Keyword_single_inheritance) {
684 if (IM == MSInheritanceAttr::Keyword_unspecified_inheritance)
689 if (MSInheritanceAttr::hasNVOffsetField(/*IsMemberFunction=*/true, IM))
690 mangleNumber(static_cast<uint32_t>(NVOffset));
691 if (MSInheritanceAttr::hasVBPtrOffsetField(IM))
692 mangleNumber(VBPtrOffset);
693 if (MSInheritanceAttr::hasVBTableOffsetField(IM))
694 mangleNumber(VBTableOffset);
697 void MicrosoftCXXNameMangler::mangleVirtualMemPtrThunk(
698 const CXXMethodDecl *MD, const MethodVFTableLocation &ML) {
699 // Get the vftable offset.
700 CharUnits PointerWidth = getASTContext().toCharUnitsFromBits(
701 getASTContext().getTargetInfo().getPointerWidth(0));
702 uint64_t OffsetInVFTable = ML.Index * PointerWidth.getQuantity();
705 mangleName(MD->getParent());
707 mangleNumber(OffsetInVFTable);
709 mangleCallingConvention(MD->getType()->getAs<FunctionProtoType>());
712 void MicrosoftCXXNameMangler::mangleName(const NamedDecl *ND) {
713 // <name> ::= <unscoped-name> {[<named-scope>]+ | [<nested-name>]}? @
715 // Always start with the unqualified name.
716 mangleUnqualifiedName(ND);
718 mangleNestedName(ND);
720 // Terminate the whole name with an '@'.
724 void MicrosoftCXXNameMangler::mangleNumber(int64_t Number) {
725 // <non-negative integer> ::= A@ # when Number == 0
726 // ::= <decimal digit> # when 1 <= Number <= 10
727 // ::= <hex digit>+ @ # when Number >= 10
729 // <number> ::= [?] <non-negative integer>
731 uint64_t Value = static_cast<uint64_t>(Number);
739 else if (Value >= 1 && Value <= 10)
742 // Numbers that are not encoded as decimal digits are represented as nibbles
743 // in the range of ASCII characters 'A' to 'P'.
744 // The number 0x123450 would be encoded as 'BCDEFA'
745 char EncodedNumberBuffer[sizeof(uint64_t) * 2];
746 MutableArrayRef<char> BufferRef(EncodedNumberBuffer);
747 MutableArrayRef<char>::reverse_iterator I = BufferRef.rbegin();
748 for (; Value != 0; Value >>= 4)
749 *I++ = 'A' + (Value & 0xf);
750 Out.write(I.base(), I - BufferRef.rbegin());
755 static const TemplateDecl *
756 isTemplate(const NamedDecl *ND, const TemplateArgumentList *&TemplateArgs) {
757 // Check if we have a function template.
758 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
759 if (const TemplateDecl *TD = FD->getPrimaryTemplate()) {
760 TemplateArgs = FD->getTemplateSpecializationArgs();
765 // Check if we have a class template.
766 if (const ClassTemplateSpecializationDecl *Spec =
767 dyn_cast<ClassTemplateSpecializationDecl>(ND)) {
768 TemplateArgs = &Spec->getTemplateArgs();
769 return Spec->getSpecializedTemplate();
772 // Check if we have a variable template.
773 if (const VarTemplateSpecializationDecl *Spec =
774 dyn_cast<VarTemplateSpecializationDecl>(ND)) {
775 TemplateArgs = &Spec->getTemplateArgs();
776 return Spec->getSpecializedTemplate();
782 void MicrosoftCXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND,
783 DeclarationName Name) {
784 // <unqualified-name> ::= <operator-name>
785 // ::= <ctor-dtor-name>
787 // ::= <template-name>
789 // Check if we have a template.
790 const TemplateArgumentList *TemplateArgs = nullptr;
791 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) {
792 // Function templates aren't considered for name back referencing. This
793 // makes sense since function templates aren't likely to occur multiple
794 // times in a symbol.
795 if (isa<FunctionTemplateDecl>(TD)) {
796 mangleTemplateInstantiationName(TD, *TemplateArgs);
801 // Here comes the tricky thing: if we need to mangle something like
802 // void foo(A::X<Y>, B::X<Y>),
803 // the X<Y> part is aliased. However, if you need to mangle
804 // void foo(A::X<A::Y>, A::X<B::Y>),
805 // the A::X<> part is not aliased.
806 // That is, from the mangler's perspective we have a structure like this:
807 // namespace[s] -> type[ -> template-parameters]
808 // but from the Clang perspective we have
809 // type [ -> template-parameters]
811 // What we do is we create a new mangler, mangle the same type (without
812 // a namespace suffix) to a string using the extra mangler and then use
813 // the mangled type name as a key to check the mangling of different types
816 // It's important to key cache reads off ND, not TD -- the same TD can
817 // be used with different TemplateArgs, but ND uniquely identifies
818 // TD / TemplateArg pairs.
819 ArgBackRefMap::iterator Found = TemplateArgBackReferences.find(ND);
820 if (Found == TemplateArgBackReferences.end()) {
822 TemplateArgStringMap::iterator Found = TemplateArgStrings.find(ND);
823 if (Found == TemplateArgStrings.end()) {
824 // Mangle full template name into temporary buffer.
825 llvm::SmallString<64> TemplateMangling;
826 llvm::raw_svector_ostream Stream(TemplateMangling);
827 MicrosoftCXXNameMangler Extra(Context, Stream);
828 Extra.mangleTemplateInstantiationName(TD, *TemplateArgs);
830 // Use the string backref vector to possibly get a back reference.
831 mangleSourceName(TemplateMangling);
833 // Memoize back reference for this type if one exist, else memoize
834 // the mangling itself.
835 BackRefVec::iterator StringFound =
836 llvm::find(NameBackReferences, TemplateMangling);
837 if (StringFound != NameBackReferences.end()) {
838 TemplateArgBackReferences[ND] =
839 StringFound - NameBackReferences.begin();
841 TemplateArgStrings[ND] =
842 TemplateArgStringStorage.save(TemplateMangling.str());
845 Out << Found->second; // Outputs a StringRef.
848 Out << Found->second; // Outputs a back reference (an int).
853 switch (Name.getNameKind()) {
854 case DeclarationName::Identifier: {
855 if (const IdentifierInfo *II = Name.getAsIdentifierInfo()) {
856 mangleSourceName(II->getName());
860 // Otherwise, an anonymous entity. We must have a declaration.
861 assert(ND && "mangling empty name without declaration");
863 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) {
864 if (NS->isAnonymousNamespace()) {
865 Out << "?A0x" << Context.getAnonymousNamespaceHash() << '@';
870 if (const DecompositionDecl *DD = dyn_cast<DecompositionDecl>(ND)) {
871 // FIXME: Invented mangling for decomposition declarations:
873 // where X,Y,Z are the names of the bindings.
874 llvm::SmallString<128> Name("[");
875 for (auto *BD : DD->bindings()) {
878 Name += BD->getDeclName().getAsIdentifierInfo()->getName();
881 mangleSourceName(Name);
885 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) {
886 // We must have an anonymous union or struct declaration.
887 const CXXRecordDecl *RD = VD->getType()->getAsCXXRecordDecl();
888 assert(RD && "expected variable decl to have a record type");
889 // Anonymous types with no tag or typedef get the name of their
890 // declarator mangled in. If they have no declarator, number them with
892 llvm::SmallString<64> Name("$S");
893 // Get a unique id for the anonymous struct.
894 Name += llvm::utostr(Context.getAnonymousStructId(RD) + 1);
895 mangleSourceName(Name.str());
899 // We must have an anonymous struct.
900 const TagDecl *TD = cast<TagDecl>(ND);
901 if (const TypedefNameDecl *D = TD->getTypedefNameForAnonDecl()) {
902 assert(TD->getDeclContext() == D->getDeclContext() &&
903 "Typedef should not be in another decl context!");
904 assert(D->getDeclName().getAsIdentifierInfo() &&
905 "Typedef was not named!");
906 mangleSourceName(D->getDeclName().getAsIdentifierInfo()->getName());
910 if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(TD)) {
911 if (Record->isLambda()) {
912 llvm::SmallString<10> Name("<lambda_");
914 Decl *LambdaContextDecl = Record->getLambdaContextDecl();
915 unsigned LambdaManglingNumber = Record->getLambdaManglingNumber();
917 const ParmVarDecl *Parm =
918 dyn_cast_or_null<ParmVarDecl>(LambdaContextDecl);
919 const FunctionDecl *Func =
920 Parm ? dyn_cast<FunctionDecl>(Parm->getDeclContext()) : nullptr;
923 unsigned DefaultArgNo =
924 Func->getNumParams() - Parm->getFunctionScopeIndex();
925 Name += llvm::utostr(DefaultArgNo);
929 if (LambdaManglingNumber)
930 LambdaId = LambdaManglingNumber;
932 LambdaId = Context.getLambdaId(Record);
934 Name += llvm::utostr(LambdaId);
937 mangleSourceName(Name);
939 // If the context of a closure type is an initializer for a class
940 // member (static or nonstatic), it is encoded in a qualified name.
941 if (LambdaManglingNumber && LambdaContextDecl) {
942 if ((isa<VarDecl>(LambdaContextDecl) ||
943 isa<FieldDecl>(LambdaContextDecl)) &&
944 LambdaContextDecl->getDeclContext()->isRecord()) {
945 mangleUnqualifiedName(cast<NamedDecl>(LambdaContextDecl));
952 llvm::SmallString<64> Name;
953 if (DeclaratorDecl *DD =
954 Context.getASTContext().getDeclaratorForUnnamedTagDecl(TD)) {
955 // Anonymous types without a name for linkage purposes have their
956 // declarator mangled in if they have one.
957 Name += "<unnamed-type-";
958 Name += DD->getName();
959 } else if (TypedefNameDecl *TND =
960 Context.getASTContext().getTypedefNameForUnnamedTagDecl(
962 // Anonymous types without a name for linkage purposes have their
963 // associate typedef mangled in if they have one.
964 Name += "<unnamed-type-";
965 Name += TND->getName();
966 } else if (isa<EnumDecl>(TD) &&
967 cast<EnumDecl>(TD)->enumerator_begin() !=
968 cast<EnumDecl>(TD)->enumerator_end()) {
969 // Anonymous non-empty enums mangle in the first enumerator.
970 auto *ED = cast<EnumDecl>(TD);
971 Name += "<unnamed-enum-";
972 Name += ED->enumerator_begin()->getName();
974 // Otherwise, number the types using a $S prefix.
975 Name += "<unnamed-type-$S";
976 Name += llvm::utostr(Context.getAnonymousStructId(TD) + 1);
979 mangleSourceName(Name.str());
983 case DeclarationName::ObjCZeroArgSelector:
984 case DeclarationName::ObjCOneArgSelector:
985 case DeclarationName::ObjCMultiArgSelector: {
986 // This is reachable only when constructing an outlined SEH finally
987 // block. Nothing depends on this mangling and it's used only with
988 // functinos with internal linkage.
989 llvm::SmallString<64> Name;
990 mangleSourceName(Name.str());
994 case DeclarationName::CXXConstructorName:
995 if (isStructorDecl(ND)) {
996 if (StructorType == Ctor_CopyingClosure) {
1000 if (StructorType == Ctor_DefaultClosure) {
1008 case DeclarationName::CXXDestructorName:
1009 if (isStructorDecl(ND))
1010 // If the named decl is the C++ destructor we're mangling,
1011 // use the type we were given.
1012 mangleCXXDtorType(static_cast<CXXDtorType>(StructorType));
1014 // Otherwise, use the base destructor name. This is relevant if a
1015 // class with a destructor is declared within a destructor.
1016 mangleCXXDtorType(Dtor_Base);
1019 case DeclarationName::CXXConversionFunctionName:
1020 // <operator-name> ::= ?B # (cast)
1021 // The target type is encoded as the return type.
1025 case DeclarationName::CXXOperatorName:
1026 mangleOperatorName(Name.getCXXOverloadedOperator(), ND->getLocation());
1029 case DeclarationName::CXXLiteralOperatorName: {
1031 mangleSourceName(Name.getCXXLiteralIdentifier()->getName());
1035 case DeclarationName::CXXDeductionGuideName:
1036 llvm_unreachable("Can't mangle a deduction guide name!");
1038 case DeclarationName::CXXUsingDirective:
1039 llvm_unreachable("Can't mangle a using directive name!");
1043 // <postfix> ::= <unqualified-name> [<postfix>]
1044 // ::= <substitution> [<postfix>]
1045 void MicrosoftCXXNameMangler::mangleNestedName(const NamedDecl *ND) {
1046 const DeclContext *DC = getEffectiveDeclContext(ND);
1047 while (!DC->isTranslationUnit()) {
1048 if (isa<TagDecl>(ND) || isa<VarDecl>(ND)) {
1050 if (Context.getNextDiscriminator(ND, Disc)) {
1057 if (const BlockDecl *BD = dyn_cast<BlockDecl>(DC)) {
1059 [](StringRef Name, const unsigned Discriminator,
1060 const unsigned ParameterDiscriminator) -> std::string {
1062 llvm::raw_string_ostream Stream(Buffer);
1065 Stream << '_' << Discriminator;
1066 if (ParameterDiscriminator)
1067 Stream << '_' << ParameterDiscriminator;
1068 return Stream.str();
1071 unsigned Discriminator = BD->getBlockManglingNumber();
1073 Discriminator = Context.getBlockId(BD, /*Local=*/false);
1075 // Mangle the parameter position as a discriminator to deal with unnamed
1076 // parameters. Rather than mangling the unqualified parameter name,
1077 // always use the position to give a uniform mangling.
1078 unsigned ParameterDiscriminator = 0;
1079 if (const auto *MC = BD->getBlockManglingContextDecl())
1080 if (const auto *P = dyn_cast<ParmVarDecl>(MC))
1081 if (const auto *F = dyn_cast<FunctionDecl>(P->getDeclContext()))
1082 ParameterDiscriminator =
1083 F->getNumParams() - P->getFunctionScopeIndex();
1085 DC = getEffectiveDeclContext(BD);
1088 mangleSourceName(Discriminate("_block_invoke", Discriminator,
1089 ParameterDiscriminator));
1090 // If we have a block mangling context, encode that now. This allows us
1091 // to discriminate between named static data initializers in the same
1092 // scope. This is handled differently from parameters, which use
1093 // positions to discriminate between multiple instances.
1094 if (const auto *MC = BD->getBlockManglingContextDecl())
1095 if (!isa<ParmVarDecl>(MC))
1096 if (const auto *ND = dyn_cast<NamedDecl>(MC))
1097 mangleUnqualifiedName(ND);
1098 // MS ABI and Itanium manglings are in inverted scopes. In the case of a
1099 // RecordDecl, mangle the entire scope hierarchy at this point rather than
1100 // just the unqualified name to get the ordering correct.
1101 if (const auto *RD = dyn_cast<RecordDecl>(DC))
1107 // struct __block_literal *
1110 if (PointersAre64Bit)
1113 mangleArtificialTagType(TTK_Struct,
1114 Discriminate("__block_literal", Discriminator,
1115 ParameterDiscriminator));
1118 // If the effective context was a Record, we have fully mangled the
1119 // qualified name and do not need to continue.
1120 if (isa<RecordDecl>(DC))
1123 } else if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(DC)) {
1124 mangleObjCMethodName(Method);
1125 } else if (isa<NamedDecl>(DC)) {
1126 ND = cast<NamedDecl>(DC);
1127 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
1131 mangleUnqualifiedName(ND);
1132 // Lambdas in default arguments conceptually belong to the function the
1133 // parameter corresponds to.
1134 if (const auto *LDADC = getLambdaDefaultArgumentDeclContext(ND)) {
1140 DC = DC->getParent();
1144 void MicrosoftCXXNameMangler::mangleCXXDtorType(CXXDtorType T) {
1145 // Microsoft uses the names on the case labels for these dtor variants. Clang
1146 // uses the Itanium terminology internally. Everything in this ABI delegates
1147 // towards the base dtor.
1149 // <operator-name> ::= ?1 # destructor
1150 case Dtor_Base: Out << "?1"; return;
1151 // <operator-name> ::= ?_D # vbase destructor
1152 case Dtor_Complete: Out << "?_D"; return;
1153 // <operator-name> ::= ?_G # scalar deleting destructor
1154 case Dtor_Deleting: Out << "?_G"; return;
1155 // <operator-name> ::= ?_E # vector deleting destructor
1156 // FIXME: Add a vector deleting dtor type. It goes in the vtable, so we need
1159 llvm_unreachable("not expecting a COMDAT");
1161 llvm_unreachable("Unsupported dtor type?");
1164 void MicrosoftCXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO,
1165 SourceLocation Loc) {
1169 // <operator-name> ::= ?2 # new
1170 case OO_New: Out << "?2"; break;
1171 // <operator-name> ::= ?3 # delete
1172 case OO_Delete: Out << "?3"; break;
1173 // <operator-name> ::= ?4 # =
1174 case OO_Equal: Out << "?4"; break;
1175 // <operator-name> ::= ?5 # >>
1176 case OO_GreaterGreater: Out << "?5"; break;
1177 // <operator-name> ::= ?6 # <<
1178 case OO_LessLess: Out << "?6"; break;
1179 // <operator-name> ::= ?7 # !
1180 case OO_Exclaim: Out << "?7"; break;
1181 // <operator-name> ::= ?8 # ==
1182 case OO_EqualEqual: Out << "?8"; break;
1183 // <operator-name> ::= ?9 # !=
1184 case OO_ExclaimEqual: Out << "?9"; break;
1185 // <operator-name> ::= ?A # []
1186 case OO_Subscript: Out << "?A"; break;
1188 // <operator-name> ::= ?C # ->
1189 case OO_Arrow: Out << "?C"; break;
1190 // <operator-name> ::= ?D # *
1191 case OO_Star: Out << "?D"; break;
1192 // <operator-name> ::= ?E # ++
1193 case OO_PlusPlus: Out << "?E"; break;
1194 // <operator-name> ::= ?F # --
1195 case OO_MinusMinus: Out << "?F"; break;
1196 // <operator-name> ::= ?G # -
1197 case OO_Minus: Out << "?G"; break;
1198 // <operator-name> ::= ?H # +
1199 case OO_Plus: Out << "?H"; break;
1200 // <operator-name> ::= ?I # &
1201 case OO_Amp: Out << "?I"; break;
1202 // <operator-name> ::= ?J # ->*
1203 case OO_ArrowStar: Out << "?J"; break;
1204 // <operator-name> ::= ?K # /
1205 case OO_Slash: Out << "?K"; break;
1206 // <operator-name> ::= ?L # %
1207 case OO_Percent: Out << "?L"; break;
1208 // <operator-name> ::= ?M # <
1209 case OO_Less: Out << "?M"; break;
1210 // <operator-name> ::= ?N # <=
1211 case OO_LessEqual: Out << "?N"; break;
1212 // <operator-name> ::= ?O # >
1213 case OO_Greater: Out << "?O"; break;
1214 // <operator-name> ::= ?P # >=
1215 case OO_GreaterEqual: Out << "?P"; break;
1216 // <operator-name> ::= ?Q # ,
1217 case OO_Comma: Out << "?Q"; break;
1218 // <operator-name> ::= ?R # ()
1219 case OO_Call: Out << "?R"; break;
1220 // <operator-name> ::= ?S # ~
1221 case OO_Tilde: Out << "?S"; break;
1222 // <operator-name> ::= ?T # ^
1223 case OO_Caret: Out << "?T"; break;
1224 // <operator-name> ::= ?U # |
1225 case OO_Pipe: Out << "?U"; break;
1226 // <operator-name> ::= ?V # &&
1227 case OO_AmpAmp: Out << "?V"; break;
1228 // <operator-name> ::= ?W # ||
1229 case OO_PipePipe: Out << "?W"; break;
1230 // <operator-name> ::= ?X # *=
1231 case OO_StarEqual: Out << "?X"; break;
1232 // <operator-name> ::= ?Y # +=
1233 case OO_PlusEqual: Out << "?Y"; break;
1234 // <operator-name> ::= ?Z # -=
1235 case OO_MinusEqual: Out << "?Z"; break;
1236 // <operator-name> ::= ?_0 # /=
1237 case OO_SlashEqual: Out << "?_0"; break;
1238 // <operator-name> ::= ?_1 # %=
1239 case OO_PercentEqual: Out << "?_1"; break;
1240 // <operator-name> ::= ?_2 # >>=
1241 case OO_GreaterGreaterEqual: Out << "?_2"; break;
1242 // <operator-name> ::= ?_3 # <<=
1243 case OO_LessLessEqual: Out << "?_3"; break;
1244 // <operator-name> ::= ?_4 # &=
1245 case OO_AmpEqual: Out << "?_4"; break;
1246 // <operator-name> ::= ?_5 # |=
1247 case OO_PipeEqual: Out << "?_5"; break;
1248 // <operator-name> ::= ?_6 # ^=
1249 case OO_CaretEqual: Out << "?_6"; break;
1254 // ?_B # local static guard
1256 // ?_D # vbase destructor
1257 // ?_E # vector deleting destructor
1258 // ?_F # default constructor closure
1259 // ?_G # scalar deleting destructor
1260 // ?_H # vector constructor iterator
1261 // ?_I # vector destructor iterator
1262 // ?_J # vector vbase constructor iterator
1263 // ?_K # virtual displacement map
1264 // ?_L # eh vector constructor iterator
1265 // ?_M # eh vector destructor iterator
1266 // ?_N # eh vector vbase constructor iterator
1267 // ?_O # copy constructor closure
1268 // ?_P<name> # udt returning <name>
1270 // ?_R0 # RTTI Type Descriptor
1271 // ?_R1 # RTTI Base Class Descriptor at (a,b,c,d)
1272 // ?_R2 # RTTI Base Class Array
1273 // ?_R3 # RTTI Class Hierarchy Descriptor
1274 // ?_R4 # RTTI Complete Object Locator
1275 // ?_S # local vftable
1276 // ?_T # local vftable constructor closure
1277 // <operator-name> ::= ?_U # new[]
1278 case OO_Array_New: Out << "?_U"; break;
1279 // <operator-name> ::= ?_V # delete[]
1280 case OO_Array_Delete: Out << "?_V"; break;
1281 // <operator-name> ::= ?__L # co_await
1282 case OO_Coawait: Out << "?__L"; break;
1283 // <operator-name> ::= ?__M # <=>
1284 case OO_Spaceship: Out << "?__M"; break;
1286 case OO_Conditional: {
1287 DiagnosticsEngine &Diags = Context.getDiags();
1288 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
1289 "cannot mangle this conditional operator yet");
1290 Diags.Report(Loc, DiagID);
1295 case NUM_OVERLOADED_OPERATORS:
1296 llvm_unreachable("Not an overloaded operator");
1300 void MicrosoftCXXNameMangler::mangleSourceName(StringRef Name) {
1301 // <source name> ::= <identifier> @
1302 BackRefVec::iterator Found = llvm::find(NameBackReferences, Name);
1303 if (Found == NameBackReferences.end()) {
1304 if (NameBackReferences.size() < 10)
1305 NameBackReferences.push_back(Name);
1308 Out << (Found - NameBackReferences.begin());
1312 void MicrosoftCXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) {
1313 Context.mangleObjCMethodName(MD, Out);
1316 void MicrosoftCXXNameMangler::mangleTemplateInstantiationName(
1317 const TemplateDecl *TD, const TemplateArgumentList &TemplateArgs) {
1318 // <template-name> ::= <unscoped-template-name> <template-args>
1319 // ::= <substitution>
1320 // Always start with the unqualified name.
1322 // Templates have their own context for back references.
1323 ArgBackRefMap OuterFunArgsContext;
1324 ArgBackRefMap OuterTemplateArgsContext;
1325 BackRefVec OuterTemplateContext;
1326 PassObjectSizeArgsSet OuterPassObjectSizeArgs;
1327 NameBackReferences.swap(OuterTemplateContext);
1328 FunArgBackReferences.swap(OuterFunArgsContext);
1329 TemplateArgBackReferences.swap(OuterTemplateArgsContext);
1330 PassObjectSizeArgs.swap(OuterPassObjectSizeArgs);
1332 mangleUnscopedTemplateName(TD);
1333 mangleTemplateArgs(TD, TemplateArgs);
1335 // Restore the previous back reference contexts.
1336 NameBackReferences.swap(OuterTemplateContext);
1337 FunArgBackReferences.swap(OuterFunArgsContext);
1338 TemplateArgBackReferences.swap(OuterTemplateArgsContext);
1339 PassObjectSizeArgs.swap(OuterPassObjectSizeArgs);
1343 MicrosoftCXXNameMangler::mangleUnscopedTemplateName(const TemplateDecl *TD) {
1344 // <unscoped-template-name> ::= ?$ <unqualified-name>
1346 mangleUnqualifiedName(TD);
1349 void MicrosoftCXXNameMangler::mangleIntegerLiteral(const llvm::APSInt &Value,
1351 // <integer-literal> ::= $0 <number>
1353 // Make sure booleans are encoded as 0/1.
1354 if (IsBoolean && Value.getBoolValue())
1356 else if (Value.isSigned())
1357 mangleNumber(Value.getSExtValue());
1359 mangleNumber(Value.getZExtValue());
1362 void MicrosoftCXXNameMangler::mangleExpression(const Expr *E) {
1363 // See if this is a constant expression.
1365 if (E->isIntegerConstantExpr(Value, Context.getASTContext())) {
1366 mangleIntegerLiteral(Value, E->getType()->isBooleanType());
1370 // Look through no-op casts like template parameter substitutions.
1371 E = E->IgnoreParenNoopCasts(Context.getASTContext());
1373 const CXXUuidofExpr *UE = nullptr;
1374 if (const UnaryOperator *UO = dyn_cast<UnaryOperator>(E)) {
1375 if (UO->getOpcode() == UO_AddrOf)
1376 UE = dyn_cast<CXXUuidofExpr>(UO->getSubExpr());
1378 UE = dyn_cast<CXXUuidofExpr>(E);
1381 // If we had to peek through an address-of operator, treat this like we are
1382 // dealing with a pointer type. Otherwise, treat it like a const reference.
1384 // N.B. This matches up with the handling of TemplateArgument::Declaration
1385 // in mangleTemplateArg
1391 // This CXXUuidofExpr is mangled as-if it were actually a VarDecl from
1392 // const __s_GUID _GUID_{lower case UUID with underscores}
1393 StringRef Uuid = UE->getUuidStr();
1394 std::string Name = "_GUID_" + Uuid.lower();
1395 std::replace(Name.begin(), Name.end(), '-', '_');
1397 mangleSourceName(Name);
1398 // Terminate the whole name with an '@'.
1400 // It's a global variable.
1402 // It's a struct called __s_GUID.
1403 mangleArtificialTagType(TTK_Struct, "__s_GUID");
1409 // As bad as this diagnostic is, it's better than crashing.
1410 DiagnosticsEngine &Diags = Context.getDiags();
1411 unsigned DiagID = Diags.getCustomDiagID(
1412 DiagnosticsEngine::Error, "cannot yet mangle expression type %0");
1413 Diags.Report(E->getExprLoc(), DiagID) << E->getStmtClassName()
1414 << E->getSourceRange();
1417 void MicrosoftCXXNameMangler::mangleTemplateArgs(
1418 const TemplateDecl *TD, const TemplateArgumentList &TemplateArgs) {
1419 // <template-args> ::= <template-arg>+
1420 const TemplateParameterList *TPL = TD->getTemplateParameters();
1421 assert(TPL->size() == TemplateArgs.size() &&
1422 "size mismatch between args and parms!");
1424 for (size_t i = 0; i < TemplateArgs.size(); ++i) {
1425 const TemplateArgument &TA = TemplateArgs[i];
1427 // Separate consecutive packs by $$Z.
1428 if (i > 0 && TA.getKind() == TemplateArgument::Pack &&
1429 TemplateArgs[i - 1].getKind() == TemplateArgument::Pack)
1432 mangleTemplateArg(TD, TA, TPL->getParam(i));
1436 void MicrosoftCXXNameMangler::mangleTemplateArg(const TemplateDecl *TD,
1437 const TemplateArgument &TA,
1438 const NamedDecl *Parm) {
1439 // <template-arg> ::= <type>
1440 // ::= <integer-literal>
1441 // ::= <member-data-pointer>
1442 // ::= <member-function-pointer>
1443 // ::= $E? <name> <type-encoding>
1444 // ::= $1? <name> <type-encoding>
1446 // ::= <template-args>
1448 switch (TA.getKind()) {
1449 case TemplateArgument::Null:
1450 llvm_unreachable("Can't mangle null template arguments!");
1451 case TemplateArgument::TemplateExpansion:
1452 llvm_unreachable("Can't mangle template expansion arguments!");
1453 case TemplateArgument::Type: {
1454 QualType T = TA.getAsType();
1455 mangleType(T, SourceRange(), QMM_Escape);
1458 case TemplateArgument::Declaration: {
1459 const NamedDecl *ND = TA.getAsDecl();
1460 if (isa<FieldDecl>(ND) || isa<IndirectFieldDecl>(ND)) {
1461 mangleMemberDataPointer(cast<CXXRecordDecl>(ND->getDeclContext())
1462 ->getMostRecentNonInjectedDecl(),
1463 cast<ValueDecl>(ND));
1464 } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
1465 const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD);
1466 if (MD && MD->isInstance()) {
1467 mangleMemberFunctionPointer(
1468 MD->getParent()->getMostRecentNonInjectedDecl(), MD);
1472 mangleFunctionEncoding(FD, /*ShouldMangle=*/true);
1475 mangle(ND, TA.getParamTypeForDecl()->isReferenceType() ? "$E?" : "$1?");
1479 case TemplateArgument::Integral:
1480 mangleIntegerLiteral(TA.getAsIntegral(),
1481 TA.getIntegralType()->isBooleanType());
1483 case TemplateArgument::NullPtr: {
1484 QualType T = TA.getNullPtrType();
1485 if (const MemberPointerType *MPT = T->getAs<MemberPointerType>()) {
1486 const CXXRecordDecl *RD = MPT->getMostRecentCXXRecordDecl();
1487 if (MPT->isMemberFunctionPointerType() &&
1488 !isa<FunctionTemplateDecl>(TD)) {
1489 mangleMemberFunctionPointer(RD, nullptr);
1492 if (MPT->isMemberDataPointer()) {
1493 if (!isa<FunctionTemplateDecl>(TD)) {
1494 mangleMemberDataPointer(RD, nullptr);
1497 // nullptr data pointers are always represented with a single field
1498 // which is initialized with either 0 or -1. Why -1? Well, we need to
1499 // distinguish the case where the data member is at offset zero in the
1501 // However, we are free to use 0 *if* we would use multiple fields for
1502 // non-nullptr member pointers.
1503 if (!RD->nullFieldOffsetIsZero()) {
1504 mangleIntegerLiteral(llvm::APSInt::get(-1), /*IsBoolean=*/false);
1509 mangleIntegerLiteral(llvm::APSInt::getUnsigned(0), /*IsBoolean=*/false);
1512 case TemplateArgument::Expression:
1513 mangleExpression(TA.getAsExpr());
1515 case TemplateArgument::Pack: {
1516 ArrayRef<TemplateArgument> TemplateArgs = TA.getPackAsArray();
1517 if (TemplateArgs.empty()) {
1518 if (isa<TemplateTypeParmDecl>(Parm) ||
1519 isa<TemplateTemplateParmDecl>(Parm))
1520 // MSVC 2015 changed the mangling for empty expanded template packs,
1521 // use the old mangling for link compatibility for old versions.
1522 Out << (Context.getASTContext().getLangOpts().isCompatibleWithMSVC(
1523 LangOptions::MSVC2015)
1526 else if (isa<NonTypeTemplateParmDecl>(Parm))
1529 llvm_unreachable("unexpected template parameter decl!");
1531 for (const TemplateArgument &PA : TemplateArgs)
1532 mangleTemplateArg(TD, PA, Parm);
1536 case TemplateArgument::Template: {
1537 const NamedDecl *ND =
1538 TA.getAsTemplate().getAsTemplateDecl()->getTemplatedDecl();
1539 if (const auto *TD = dyn_cast<TagDecl>(ND)) {
1541 } else if (isa<TypeAliasDecl>(ND)) {
1545 llvm_unreachable("unexpected template template NamedDecl!");
1552 void MicrosoftCXXNameMangler::mangleObjCProtocol(const ObjCProtocolDecl *PD) {
1553 llvm::SmallString<64> TemplateMangling;
1554 llvm::raw_svector_ostream Stream(TemplateMangling);
1555 MicrosoftCXXNameMangler Extra(Context, Stream);
1558 Extra.mangleSourceName("Protocol");
1559 Extra.mangleArtificialTagType(TTK_Struct, PD->getName());
1561 mangleArtificialTagType(TTK_Struct, TemplateMangling, {"__ObjC"});
1564 void MicrosoftCXXNameMangler::mangleObjCLifetime(const QualType Type,
1566 SourceRange Range) {
1567 llvm::SmallString<64> TemplateMangling;
1568 llvm::raw_svector_ostream Stream(TemplateMangling);
1569 MicrosoftCXXNameMangler Extra(Context, Stream);
1572 switch (Quals.getObjCLifetime()) {
1573 case Qualifiers::OCL_None:
1574 case Qualifiers::OCL_ExplicitNone:
1576 case Qualifiers::OCL_Autoreleasing:
1577 Extra.mangleSourceName("Autoreleasing");
1579 case Qualifiers::OCL_Strong:
1580 Extra.mangleSourceName("Strong");
1582 case Qualifiers::OCL_Weak:
1583 Extra.mangleSourceName("Weak");
1586 Extra.manglePointerCVQualifiers(Quals);
1587 Extra.manglePointerExtQualifiers(Quals, Type);
1588 Extra.mangleType(Type, Range);
1590 mangleArtificialTagType(TTK_Struct, TemplateMangling, {"__ObjC"});
1593 void MicrosoftCXXNameMangler::mangleObjCKindOfType(const ObjCObjectType *T,
1595 SourceRange Range) {
1596 llvm::SmallString<64> TemplateMangling;
1597 llvm::raw_svector_ostream Stream(TemplateMangling);
1598 MicrosoftCXXNameMangler Extra(Context, Stream);
1601 Extra.mangleSourceName("KindOf");
1602 Extra.mangleType(QualType(T, 0)
1603 .stripObjCKindOfType(getASTContext())
1604 ->getAs<ObjCObjectType>(),
1607 mangleArtificialTagType(TTK_Struct, TemplateMangling, {"__ObjC"});
1610 void MicrosoftCXXNameMangler::mangleQualifiers(Qualifiers Quals,
1612 // <cvr-qualifiers> ::= [E] [F] [I] <base-cvr-qualifiers>
1613 // 'E' means __ptr64 (32-bit only); 'F' means __unaligned (32/64-bit only);
1614 // 'I' means __restrict (32/64-bit).
1615 // Note that the MSVC __restrict keyword isn't the same as the C99 restrict
1617 // <base-cvr-qualifiers> ::= A # near
1618 // ::= B # near const
1619 // ::= C # near volatile
1620 // ::= D # near const volatile
1621 // ::= E # far (16-bit)
1622 // ::= F # far const (16-bit)
1623 // ::= G # far volatile (16-bit)
1624 // ::= H # far const volatile (16-bit)
1625 // ::= I # huge (16-bit)
1626 // ::= J # huge const (16-bit)
1627 // ::= K # huge volatile (16-bit)
1628 // ::= L # huge const volatile (16-bit)
1629 // ::= M <basis> # based
1630 // ::= N <basis> # based const
1631 // ::= O <basis> # based volatile
1632 // ::= P <basis> # based const volatile
1633 // ::= Q # near member
1634 // ::= R # near const member
1635 // ::= S # near volatile member
1636 // ::= T # near const volatile member
1637 // ::= U # far member (16-bit)
1638 // ::= V # far const member (16-bit)
1639 // ::= W # far volatile member (16-bit)
1640 // ::= X # far const volatile member (16-bit)
1641 // ::= Y # huge member (16-bit)
1642 // ::= Z # huge const member (16-bit)
1643 // ::= 0 # huge volatile member (16-bit)
1644 // ::= 1 # huge const volatile member (16-bit)
1645 // ::= 2 <basis> # based member
1646 // ::= 3 <basis> # based const member
1647 // ::= 4 <basis> # based volatile member
1648 // ::= 5 <basis> # based const volatile member
1649 // ::= 6 # near function (pointers only)
1650 // ::= 7 # far function (pointers only)
1651 // ::= 8 # near method (pointers only)
1652 // ::= 9 # far method (pointers only)
1653 // ::= _A <basis> # based function (pointers only)
1654 // ::= _B <basis> # based function (far?) (pointers only)
1655 // ::= _C <basis> # based method (pointers only)
1656 // ::= _D <basis> # based method (far?) (pointers only)
1657 // ::= _E # block (Clang)
1658 // <basis> ::= 0 # __based(void)
1659 // ::= 1 # __based(segment)?
1660 // ::= 2 <name> # __based(name)
1663 // ::= 5 # not really based
1664 bool HasConst = Quals.hasConst(),
1665 HasVolatile = Quals.hasVolatile();
1668 if (HasConst && HasVolatile) {
1670 } else if (HasVolatile) {
1672 } else if (HasConst) {
1678 if (HasConst && HasVolatile) {
1680 } else if (HasVolatile) {
1682 } else if (HasConst) {
1689 // FIXME: For now, just drop all extension qualifiers on the floor.
1693 MicrosoftCXXNameMangler::mangleRefQualifier(RefQualifierKind RefQualifier) {
1694 // <ref-qualifier> ::= G # lvalue reference
1695 // ::= H # rvalue-reference
1696 switch (RefQualifier) {
1710 void MicrosoftCXXNameMangler::manglePointerExtQualifiers(Qualifiers Quals,
1711 QualType PointeeType) {
1712 if (PointersAre64Bit &&
1713 (PointeeType.isNull() || !PointeeType->isFunctionType()))
1716 if (Quals.hasRestrict())
1719 if (Quals.hasUnaligned() ||
1720 (!PointeeType.isNull() && PointeeType.getLocalQualifiers().hasUnaligned()))
1724 void MicrosoftCXXNameMangler::manglePointerCVQualifiers(Qualifiers Quals) {
1725 // <pointer-cv-qualifiers> ::= P # no qualifiers
1728 // ::= S # const volatile
1729 bool HasConst = Quals.hasConst(),
1730 HasVolatile = Quals.hasVolatile();
1732 if (HasConst && HasVolatile) {
1734 } else if (HasVolatile) {
1736 } else if (HasConst) {
1743 void MicrosoftCXXNameMangler::mangleFunctionArgumentType(QualType T,
1744 SourceRange Range) {
1745 // MSVC will backreference two canonically equivalent types that have slightly
1746 // different manglings when mangled alone.
1748 // Decayed types do not match up with non-decayed versions of the same type.
1751 // void (*x)(void) will not form a backreference with void x(void)
1753 if (const auto *DT = T->getAs<DecayedType>()) {
1754 QualType OriginalType = DT->getOriginalType();
1755 // All decayed ArrayTypes should be treated identically; as-if they were
1756 // a decayed IncompleteArrayType.
1757 if (const auto *AT = getASTContext().getAsArrayType(OriginalType))
1758 OriginalType = getASTContext().getIncompleteArrayType(
1759 AT->getElementType(), AT->getSizeModifier(),
1760 AT->getIndexTypeCVRQualifiers());
1762 TypePtr = OriginalType.getCanonicalType().getAsOpaquePtr();
1763 // If the original parameter was textually written as an array,
1764 // instead treat the decayed parameter like it's const.
1767 // int [] -> int * const
1768 if (OriginalType->isArrayType())
1771 TypePtr = T.getCanonicalType().getAsOpaquePtr();
1774 ArgBackRefMap::iterator Found = FunArgBackReferences.find(TypePtr);
1776 if (Found == FunArgBackReferences.end()) {
1777 size_t OutSizeBefore = Out.tell();
1779 mangleType(T, Range, QMM_Drop);
1781 // See if it's worth creating a back reference.
1782 // Only types longer than 1 character are considered
1783 // and only 10 back references slots are available:
1784 bool LongerThanOneChar = (Out.tell() - OutSizeBefore > 1);
1785 if (LongerThanOneChar && FunArgBackReferences.size() < 10) {
1786 size_t Size = FunArgBackReferences.size();
1787 FunArgBackReferences[TypePtr] = Size;
1790 Out << Found->second;
1794 void MicrosoftCXXNameMangler::manglePassObjectSizeArg(
1795 const PassObjectSizeAttr *POSA) {
1796 int Type = POSA->getType();
1797 bool Dynamic = POSA->isDynamic();
1799 auto Iter = PassObjectSizeArgs.insert({Type, Dynamic}).first;
1800 auto *TypePtr = (const void *)&*Iter;
1801 ArgBackRefMap::iterator Found = FunArgBackReferences.find(TypePtr);
1803 if (Found == FunArgBackReferences.end()) {
1805 Dynamic ? "__pass_dynamic_object_size" : "__pass_object_size";
1806 mangleArtificialTagType(TTK_Enum, Name + llvm::utostr(Type), {"__clang"});
1808 if (FunArgBackReferences.size() < 10) {
1809 size_t Size = FunArgBackReferences.size();
1810 FunArgBackReferences[TypePtr] = Size;
1813 Out << Found->second;
1817 void MicrosoftCXXNameMangler::mangleAddressSpaceType(QualType T,
1819 SourceRange Range) {
1820 // Address space is mangled as an unqualified templated type in the __clang
1821 // namespace. The demangled version of this is:
1822 // In the case of a language specific address space:
1823 // __clang::struct _AS[language_addr_space]<Type>
1825 // <language_addr_space> ::= <OpenCL-addrspace> | <CUDA-addrspace>
1826 // <OpenCL-addrspace> ::= "CL" [ "global" | "local" | "constant" |
1827 // "private"| "generic" ]
1828 // <CUDA-addrspace> ::= "CU" [ "device" | "constant" | "shared" ]
1829 // Note that the above were chosen to match the Itanium mangling for this.
1831 // In the case of a non-language specific address space:
1832 // __clang::struct _AS<TargetAS, Type>
1833 assert(Quals.hasAddressSpace() && "Not valid without address space");
1834 llvm::SmallString<32> ASMangling;
1835 llvm::raw_svector_ostream Stream(ASMangling);
1836 MicrosoftCXXNameMangler Extra(Context, Stream);
1839 LangAS AS = Quals.getAddressSpace();
1840 if (Context.getASTContext().addressSpaceMapManglingFor(AS)) {
1841 unsigned TargetAS = Context.getASTContext().getTargetAddressSpace(AS);
1842 Extra.mangleSourceName("_AS");
1843 Extra.mangleIntegerLiteral(llvm::APSInt::getUnsigned(TargetAS),
1844 /*IsBoolean*/ false);
1848 llvm_unreachable("Not a language specific address space");
1849 case LangAS::opencl_global:
1850 Extra.mangleSourceName("_ASCLglobal");
1852 case LangAS::opencl_local:
1853 Extra.mangleSourceName("_ASCLlocal");
1855 case LangAS::opencl_constant:
1856 Extra.mangleSourceName("_ASCLconstant");
1858 case LangAS::opencl_private:
1859 Extra.mangleSourceName("_ASCLprivate");
1861 case LangAS::opencl_generic:
1862 Extra.mangleSourceName("_ASCLgeneric");
1864 case LangAS::cuda_device:
1865 Extra.mangleSourceName("_ASCUdevice");
1867 case LangAS::cuda_constant:
1868 Extra.mangleSourceName("_ASCUconstant");
1870 case LangAS::cuda_shared:
1871 Extra.mangleSourceName("_ASCUshared");
1876 Extra.mangleType(T, Range, QMM_Escape);
1877 mangleQualifiers(Qualifiers(), false);
1878 mangleArtificialTagType(TTK_Struct, ASMangling, {"__clang"});
1881 void MicrosoftCXXNameMangler::mangleType(QualType T, SourceRange Range,
1882 QualifierMangleMode QMM) {
1883 // Don't use the canonical types. MSVC includes things like 'const' on
1884 // pointer arguments to function pointers that canonicalization strips away.
1885 T = T.getDesugaredType(getASTContext());
1886 Qualifiers Quals = T.getLocalQualifiers();
1888 if (const ArrayType *AT = getASTContext().getAsArrayType(T)) {
1889 // If there were any Quals, getAsArrayType() pushed them onto the array
1891 if (QMM == QMM_Mangle)
1893 else if (QMM == QMM_Escape || QMM == QMM_Result)
1895 mangleArrayType(AT);
1899 bool IsPointer = T->isAnyPointerType() || T->isMemberPointerType() ||
1900 T->isReferenceType() || T->isBlockPointerType();
1904 if (Quals.hasObjCLifetime())
1905 Quals = Quals.withoutObjCLifetime();
1908 if (const FunctionType *FT = dyn_cast<FunctionType>(T)) {
1910 mangleFunctionType(FT);
1913 mangleQualifiers(Quals, false);
1916 if (!IsPointer && Quals) {
1918 mangleQualifiers(Quals, false);
1922 // Presence of __unaligned qualifier shouldn't affect mangling here.
1923 Quals.removeUnaligned();
1924 if (Quals.hasObjCLifetime())
1925 Quals = Quals.withoutObjCLifetime();
1926 if ((!IsPointer && Quals) || isa<TagType>(T) || isArtificialTagType(T)) {
1928 mangleQualifiers(Quals, false);
1933 const Type *ty = T.getTypePtr();
1935 switch (ty->getTypeClass()) {
1936 #define ABSTRACT_TYPE(CLASS, PARENT)
1937 #define NON_CANONICAL_TYPE(CLASS, PARENT) \
1939 llvm_unreachable("can't mangle non-canonical type " #CLASS "Type"); \
1941 #define TYPE(CLASS, PARENT) \
1943 mangleType(cast<CLASS##Type>(ty), Quals, Range); \
1945 #include "clang/AST/TypeNodes.def"
1946 #undef ABSTRACT_TYPE
1947 #undef NON_CANONICAL_TYPE
1952 void MicrosoftCXXNameMangler::mangleType(const BuiltinType *T, Qualifiers,
1953 SourceRange Range) {
1954 // <type> ::= <builtin-type>
1955 // <builtin-type> ::= X # void
1956 // ::= C # signed char
1958 // ::= E # unsigned char
1960 // ::= G # unsigned short (or wchar_t if it's not a builtin)
1962 // ::= I # unsigned int
1964 // ::= K # unsigned long
1968 // ::= O # long double (__float80 is mangled differently)
1969 // ::= _J # long long, __int64
1970 // ::= _K # unsigned long long, __int64
1971 // ::= _L # __int128
1972 // ::= _M # unsigned __int128
1974 // _O # <array in parameter>
1976 // ::= _S # char16_t
1977 // ::= _T # __float80 (Intel)
1978 // ::= _U # char32_t
1980 // ::= _Z # __float80 (Digital Mars)
1981 switch (T->getKind()) {
1982 case BuiltinType::Void:
1985 case BuiltinType::SChar:
1988 case BuiltinType::Char_U:
1989 case BuiltinType::Char_S:
1992 case BuiltinType::UChar:
1995 case BuiltinType::Short:
1998 case BuiltinType::UShort:
2001 case BuiltinType::Int:
2004 case BuiltinType::UInt:
2007 case BuiltinType::Long:
2010 case BuiltinType::ULong:
2013 case BuiltinType::Float:
2016 case BuiltinType::Double:
2019 // TODO: Determine size and mangle accordingly
2020 case BuiltinType::LongDouble:
2023 case BuiltinType::LongLong:
2026 case BuiltinType::ULongLong:
2029 case BuiltinType::Int128:
2032 case BuiltinType::UInt128:
2035 case BuiltinType::Bool:
2038 case BuiltinType::Char8:
2041 case BuiltinType::Char16:
2044 case BuiltinType::Char32:
2047 case BuiltinType::WChar_S:
2048 case BuiltinType::WChar_U:
2052 #define BUILTIN_TYPE(Id, SingletonId)
2053 #define PLACEHOLDER_TYPE(Id, SingletonId) \
2054 case BuiltinType::Id:
2055 #include "clang/AST/BuiltinTypes.def"
2056 case BuiltinType::Dependent:
2057 llvm_unreachable("placeholder types shouldn't get to name mangling");
2059 case BuiltinType::ObjCId:
2060 mangleArtificialTagType(TTK_Struct, "objc_object");
2062 case BuiltinType::ObjCClass:
2063 mangleArtificialTagType(TTK_Struct, "objc_class");
2065 case BuiltinType::ObjCSel:
2066 mangleArtificialTagType(TTK_Struct, "objc_selector");
2069 #define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
2070 case BuiltinType::Id: \
2071 Out << "PAUocl_" #ImgType "_" #Suffix "@@"; \
2073 #include "clang/Basic/OpenCLImageTypes.def"
2074 case BuiltinType::OCLSampler:
2076 mangleArtificialTagType(TTK_Struct, "ocl_sampler");
2078 case BuiltinType::OCLEvent:
2080 mangleArtificialTagType(TTK_Struct, "ocl_event");
2082 case BuiltinType::OCLClkEvent:
2084 mangleArtificialTagType(TTK_Struct, "ocl_clkevent");
2086 case BuiltinType::OCLQueue:
2088 mangleArtificialTagType(TTK_Struct, "ocl_queue");
2090 case BuiltinType::OCLReserveID:
2092 mangleArtificialTagType(TTK_Struct, "ocl_reserveid");
2094 #define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
2095 case BuiltinType::Id: \
2096 mangleArtificialTagType(TTK_Struct, "ocl_" #ExtType); \
2098 #include "clang/Basic/OpenCLExtensionTypes.def"
2100 case BuiltinType::NullPtr:
2104 case BuiltinType::Float16:
2105 mangleArtificialTagType(TTK_Struct, "_Float16", {"__clang"});
2108 case BuiltinType::Half:
2109 mangleArtificialTagType(TTK_Struct, "_Half", {"__clang"});
2112 case BuiltinType::ShortAccum:
2113 case BuiltinType::Accum:
2114 case BuiltinType::LongAccum:
2115 case BuiltinType::UShortAccum:
2116 case BuiltinType::UAccum:
2117 case BuiltinType::ULongAccum:
2118 case BuiltinType::ShortFract:
2119 case BuiltinType::Fract:
2120 case BuiltinType::LongFract:
2121 case BuiltinType::UShortFract:
2122 case BuiltinType::UFract:
2123 case BuiltinType::ULongFract:
2124 case BuiltinType::SatShortAccum:
2125 case BuiltinType::SatAccum:
2126 case BuiltinType::SatLongAccum:
2127 case BuiltinType::SatUShortAccum:
2128 case BuiltinType::SatUAccum:
2129 case BuiltinType::SatULongAccum:
2130 case BuiltinType::SatShortFract:
2131 case BuiltinType::SatFract:
2132 case BuiltinType::SatLongFract:
2133 case BuiltinType::SatUShortFract:
2134 case BuiltinType::SatUFract:
2135 case BuiltinType::SatULongFract:
2136 case BuiltinType::Float128: {
2137 DiagnosticsEngine &Diags = Context.getDiags();
2138 unsigned DiagID = Diags.getCustomDiagID(
2139 DiagnosticsEngine::Error, "cannot mangle this built-in %0 type yet");
2140 Diags.Report(Range.getBegin(), DiagID)
2141 << T->getName(Context.getASTContext().getPrintingPolicy()) << Range;
2147 // <type> ::= <function-type>
2148 void MicrosoftCXXNameMangler::mangleType(const FunctionProtoType *T, Qualifiers,
2150 // Structors only appear in decls, so at this point we know it's not a
2152 // FIXME: This may not be lambda-friendly.
2153 if (T->getMethodQuals() || T->getRefQualifier() != RQ_None) {
2155 mangleFunctionType(T, /*D=*/nullptr, /*ForceThisQuals=*/true);
2158 mangleFunctionType(T);
2161 void MicrosoftCXXNameMangler::mangleType(const FunctionNoProtoType *T,
2162 Qualifiers, SourceRange) {
2164 mangleFunctionType(T);
2167 void MicrosoftCXXNameMangler::mangleFunctionType(const FunctionType *T,
2168 const FunctionDecl *D,
2169 bool ForceThisQuals,
2170 bool MangleExceptionSpec) {
2171 // <function-type> ::= <this-cvr-qualifiers> <calling-convention>
2172 // <return-type> <argument-list> <throw-spec>
2173 const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(T);
2176 if (D) Range = D->getSourceRange();
2178 bool IsInLambda = false;
2179 bool IsStructor = false, HasThisQuals = ForceThisQuals, IsCtorClosure = false;
2180 CallingConv CC = T->getCallConv();
2181 if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(D)) {
2182 if (MD->getParent()->isLambda())
2184 if (MD->isInstance())
2185 HasThisQuals = true;
2186 if (isa<CXXDestructorDecl>(MD)) {
2188 } else if (isa<CXXConstructorDecl>(MD)) {
2190 IsCtorClosure = (StructorType == Ctor_CopyingClosure ||
2191 StructorType == Ctor_DefaultClosure) &&
2194 CC = getASTContext().getDefaultCallingConvention(
2195 /*IsVariadic=*/false, /*IsCXXMethod=*/true);
2199 // If this is a C++ instance method, mangle the CVR qualifiers for the
2202 Qualifiers Quals = Proto->getMethodQuals();
2203 manglePointerExtQualifiers(Quals, /*PointeeType=*/QualType());
2204 mangleRefQualifier(Proto->getRefQualifier());
2205 mangleQualifiers(Quals, /*IsMember=*/false);
2208 mangleCallingConvention(CC);
2210 // <return-type> ::= <type>
2211 // ::= @ # structors (they have no declared return type)
2213 if (isa<CXXDestructorDecl>(D) && isStructorDecl(D)) {
2214 // The scalar deleting destructor takes an extra int argument which is not
2215 // reflected in the AST.
2216 if (StructorType == Dtor_Deleting) {
2217 Out << (PointersAre64Bit ? "PEAXI@Z" : "PAXI@Z");
2220 // The vbase destructor returns void which is not reflected in the AST.
2221 if (StructorType == Dtor_Complete) {
2226 if (IsCtorClosure) {
2227 // Default constructor closure and copy constructor closure both return
2231 if (StructorType == Ctor_DefaultClosure) {
2232 // Default constructor closure always has no arguments.
2234 } else if (StructorType == Ctor_CopyingClosure) {
2235 // Copy constructor closure always takes an unqualified reference.
2236 mangleFunctionArgumentType(getASTContext().getLValueReferenceType(
2237 Proto->getParamType(0)
2238 ->getAs<LValueReferenceType>()
2240 /*SpelledAsLValue=*/true),
2244 llvm_unreachable("unexpected constructor closure!");
2251 QualType ResultType = T->getReturnType();
2252 if (const auto *AT =
2253 dyn_cast_or_null<AutoType>(ResultType->getContainedAutoType())) {
2255 mangleQualifiers(ResultType.getLocalQualifiers(), /*IsMember=*/false);
2257 assert(AT->getKeyword() != AutoTypeKeyword::GNUAutoType &&
2258 "shouldn't need to mangle __auto_type!");
2259 mangleSourceName(AT->isDecltypeAuto() ? "<decltype-auto>" : "<auto>");
2261 } else if (IsInLambda) {
2264 if (ResultType->isVoidType())
2265 ResultType = ResultType.getUnqualifiedType();
2266 mangleType(ResultType, Range, QMM_Result);
2270 // <argument-list> ::= X # void
2272 // ::= <type>* Z # varargs
2274 // Function types without prototypes can arise when mangling a function type
2275 // within an overloadable function in C. We mangle these as the absence of
2276 // any parameter types (not even an empty parameter list).
2278 } else if (Proto->getNumParams() == 0 && !Proto->isVariadic()) {
2281 // Happens for function pointer type arguments for example.
2282 for (unsigned I = 0, E = Proto->getNumParams(); I != E; ++I) {
2283 mangleFunctionArgumentType(Proto->getParamType(I), Range);
2284 // Mangle each pass_object_size parameter as if it's a parameter of enum
2285 // type passed directly after the parameter with the pass_object_size
2286 // attribute. The aforementioned enum's name is __pass_object_size, and we
2287 // pretend it resides in a top-level namespace called __clang.
2289 // FIXME: Is there a defined extension notation for the MS ABI, or is it
2290 // necessary to just cross our fingers and hope this type+namespace
2291 // combination doesn't conflict with anything?
2293 if (const auto *P = D->getParamDecl(I)->getAttr<PassObjectSizeAttr>())
2294 manglePassObjectSizeArg(P);
2296 // <builtin-type> ::= Z # ellipsis
2297 if (Proto->isVariadic())
2303 if (MangleExceptionSpec && getASTContext().getLangOpts().CPlusPlus17 &&
2304 getASTContext().getLangOpts().isCompatibleWithMSVC(
2305 LangOptions::MSVC2017_5))
2306 mangleThrowSpecification(Proto);
2311 void MicrosoftCXXNameMangler::mangleFunctionClass(const FunctionDecl *FD) {
2312 // <function-class> ::= <member-function> E? # E designates a 64-bit 'this'
2313 // # pointer. in 64-bit mode *all*
2314 // # 'this' pointers are 64-bit.
2315 // ::= <global-function>
2316 // <member-function> ::= A # private: near
2317 // ::= B # private: far
2318 // ::= C # private: static near
2319 // ::= D # private: static far
2320 // ::= E # private: virtual near
2321 // ::= F # private: virtual far
2322 // ::= I # protected: near
2323 // ::= J # protected: far
2324 // ::= K # protected: static near
2325 // ::= L # protected: static far
2326 // ::= M # protected: virtual near
2327 // ::= N # protected: virtual far
2328 // ::= Q # public: near
2329 // ::= R # public: far
2330 // ::= S # public: static near
2331 // ::= T # public: static far
2332 // ::= U # public: virtual near
2333 // ::= V # public: virtual far
2334 // <global-function> ::= Y # global near
2335 // ::= Z # global far
2336 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
2337 bool IsVirtual = MD->isVirtual();
2338 // When mangling vbase destructor variants, ignore whether or not the
2339 // underlying destructor was defined to be virtual.
2340 if (isa<CXXDestructorDecl>(MD) && isStructorDecl(MD) &&
2341 StructorType == Dtor_Complete) {
2344 switch (MD->getAccess()) {
2346 llvm_unreachable("Unsupported access specifier");
2375 void MicrosoftCXXNameMangler::mangleCallingConvention(CallingConv CC) {
2376 // <calling-convention> ::= A # __cdecl
2377 // ::= B # __export __cdecl
2379 // ::= D # __export __pascal
2380 // ::= E # __thiscall
2381 // ::= F # __export __thiscall
2382 // ::= G # __stdcall
2383 // ::= H # __export __stdcall
2384 // ::= I # __fastcall
2385 // ::= J # __export __fastcall
2386 // ::= Q # __vectorcall
2387 // ::= w # __regcall
2388 // The 'export' calling conventions are from a bygone era
2389 // (*cough*Win16*cough*) when functions were declared for export with
2390 // that keyword. (It didn't actually export them, it just made them so
2391 // that they could be in a DLL and somebody from another module could call
2396 llvm_unreachable("Unsupported CC for mangling");
2399 case CC_C: Out << 'A'; break;
2400 case CC_X86Pascal: Out << 'C'; break;
2401 case CC_X86ThisCall: Out << 'E'; break;
2402 case CC_X86StdCall: Out << 'G'; break;
2403 case CC_X86FastCall: Out << 'I'; break;
2404 case CC_X86VectorCall: Out << 'Q'; break;
2405 case CC_Swift: Out << 'S'; break;
2406 case CC_PreserveMost: Out << 'U'; break;
2407 case CC_X86RegCall: Out << 'w'; break;
2410 void MicrosoftCXXNameMangler::mangleCallingConvention(const FunctionType *T) {
2411 mangleCallingConvention(T->getCallConv());
2414 void MicrosoftCXXNameMangler::mangleThrowSpecification(
2415 const FunctionProtoType *FT) {
2416 // <throw-spec> ::= Z # (default)
2417 // ::= _E # noexcept
2424 void MicrosoftCXXNameMangler::mangleType(const UnresolvedUsingType *T,
2425 Qualifiers, SourceRange Range) {
2426 // Probably should be mangled as a template instantiation; need to see what
2428 DiagnosticsEngine &Diags = Context.getDiags();
2429 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2430 "cannot mangle this unresolved dependent type yet");
2431 Diags.Report(Range.getBegin(), DiagID)
2435 // <type> ::= <union-type> | <struct-type> | <class-type> | <enum-type>
2436 // <union-type> ::= T <name>
2437 // <struct-type> ::= U <name>
2438 // <class-type> ::= V <name>
2439 // <enum-type> ::= W4 <name>
2440 void MicrosoftCXXNameMangler::mangleTagTypeKind(TagTypeKind TTK) {
2457 void MicrosoftCXXNameMangler::mangleType(const EnumType *T, Qualifiers,
2459 mangleType(cast<TagType>(T)->getDecl());
2461 void MicrosoftCXXNameMangler::mangleType(const RecordType *T, Qualifiers,
2463 mangleType(cast<TagType>(T)->getDecl());
2465 void MicrosoftCXXNameMangler::mangleType(const TagDecl *TD) {
2466 mangleTagTypeKind(TD->getTagKind());
2470 // If you add a call to this, consider updating isArtificialTagType() too.
2471 void MicrosoftCXXNameMangler::mangleArtificialTagType(
2472 TagTypeKind TK, StringRef UnqualifiedName,
2473 ArrayRef<StringRef> NestedNames) {
2474 // <name> ::= <unscoped-name> {[<named-scope>]+ | [<nested-name>]}? @
2475 mangleTagTypeKind(TK);
2477 // Always start with the unqualified name.
2478 mangleSourceName(UnqualifiedName);
2480 for (auto I = NestedNames.rbegin(), E = NestedNames.rend(); I != E; ++I)
2481 mangleSourceName(*I);
2483 // Terminate the whole name with an '@'.
2487 // <type> ::= <array-type>
2488 // <array-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers>
2489 // [Y <dimension-count> <dimension>+]
2490 // <element-type> # as global, E is never required
2491 // It's supposed to be the other way around, but for some strange reason, it
2492 // isn't. Today this behavior is retained for the sole purpose of backwards
2494 void MicrosoftCXXNameMangler::mangleDecayedArrayType(const ArrayType *T) {
2495 // This isn't a recursive mangling, so now we have to do it all in this
2497 manglePointerCVQualifiers(T->getElementType().getQualifiers());
2498 mangleType(T->getElementType(), SourceRange());
2500 void MicrosoftCXXNameMangler::mangleType(const ConstantArrayType *T, Qualifiers,
2502 llvm_unreachable("Should have been special cased");
2504 void MicrosoftCXXNameMangler::mangleType(const VariableArrayType *T, Qualifiers,
2506 llvm_unreachable("Should have been special cased");
2508 void MicrosoftCXXNameMangler::mangleType(const DependentSizedArrayType *T,
2509 Qualifiers, SourceRange) {
2510 llvm_unreachable("Should have been special cased");
2512 void MicrosoftCXXNameMangler::mangleType(const IncompleteArrayType *T,
2513 Qualifiers, SourceRange) {
2514 llvm_unreachable("Should have been special cased");
2516 void MicrosoftCXXNameMangler::mangleArrayType(const ArrayType *T) {
2517 QualType ElementTy(T, 0);
2518 SmallVector<llvm::APInt, 3> Dimensions;
2520 if (ElementTy->isConstantArrayType()) {
2521 const ConstantArrayType *CAT =
2522 getASTContext().getAsConstantArrayType(ElementTy);
2523 Dimensions.push_back(CAT->getSize());
2524 ElementTy = CAT->getElementType();
2525 } else if (ElementTy->isIncompleteArrayType()) {
2526 const IncompleteArrayType *IAT =
2527 getASTContext().getAsIncompleteArrayType(ElementTy);
2528 Dimensions.push_back(llvm::APInt(32, 0));
2529 ElementTy = IAT->getElementType();
2530 } else if (ElementTy->isVariableArrayType()) {
2531 const VariableArrayType *VAT =
2532 getASTContext().getAsVariableArrayType(ElementTy);
2533 Dimensions.push_back(llvm::APInt(32, 0));
2534 ElementTy = VAT->getElementType();
2535 } else if (ElementTy->isDependentSizedArrayType()) {
2536 // The dependent expression has to be folded into a constant (TODO).
2537 const DependentSizedArrayType *DSAT =
2538 getASTContext().getAsDependentSizedArrayType(ElementTy);
2539 DiagnosticsEngine &Diags = Context.getDiags();
2540 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2541 "cannot mangle this dependent-length array yet");
2542 Diags.Report(DSAT->getSizeExpr()->getExprLoc(), DiagID)
2543 << DSAT->getBracketsRange();
2550 // <dimension-count> ::= <number> # number of extra dimensions
2551 mangleNumber(Dimensions.size());
2552 for (const llvm::APInt &Dimension : Dimensions)
2553 mangleNumber(Dimension.getLimitedValue());
2554 mangleType(ElementTy, SourceRange(), QMM_Escape);
2557 // <type> ::= <pointer-to-member-type>
2558 // <pointer-to-member-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers>
2559 // <class name> <type>
2560 void MicrosoftCXXNameMangler::mangleType(const MemberPointerType *T,
2561 Qualifiers Quals, SourceRange Range) {
2562 QualType PointeeType = T->getPointeeType();
2563 manglePointerCVQualifiers(Quals);
2564 manglePointerExtQualifiers(Quals, PointeeType);
2565 if (const FunctionProtoType *FPT = PointeeType->getAs<FunctionProtoType>()) {
2567 mangleName(T->getClass()->castAs<RecordType>()->getDecl());
2568 mangleFunctionType(FPT, nullptr, true);
2570 mangleQualifiers(PointeeType.getQualifiers(), true);
2571 mangleName(T->getClass()->castAs<RecordType>()->getDecl());
2572 mangleType(PointeeType, Range, QMM_Drop);
2576 void MicrosoftCXXNameMangler::mangleType(const TemplateTypeParmType *T,
2577 Qualifiers, SourceRange Range) {
2578 DiagnosticsEngine &Diags = Context.getDiags();
2579 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2580 "cannot mangle this template type parameter type yet");
2581 Diags.Report(Range.getBegin(), DiagID)
2585 void MicrosoftCXXNameMangler::mangleType(const SubstTemplateTypeParmPackType *T,
2586 Qualifiers, SourceRange Range) {
2587 DiagnosticsEngine &Diags = Context.getDiags();
2588 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2589 "cannot mangle this substituted parameter pack yet");
2590 Diags.Report(Range.getBegin(), DiagID)
2594 // <type> ::= <pointer-type>
2595 // <pointer-type> ::= E? <pointer-cvr-qualifiers> <cvr-qualifiers> <type>
2596 // # the E is required for 64-bit non-static pointers
2597 void MicrosoftCXXNameMangler::mangleType(const PointerType *T, Qualifiers Quals,
2598 SourceRange Range) {
2599 QualType PointeeType = T->getPointeeType();
2600 manglePointerCVQualifiers(Quals);
2601 manglePointerExtQualifiers(Quals, PointeeType);
2603 if (PointeeType.getQualifiers().hasAddressSpace())
2604 mangleAddressSpaceType(PointeeType, PointeeType.getQualifiers(), Range);
2606 mangleType(PointeeType, Range);
2609 void MicrosoftCXXNameMangler::mangleType(const ObjCObjectPointerType *T,
2610 Qualifiers Quals, SourceRange Range) {
2611 QualType PointeeType = T->getPointeeType();
2612 switch (Quals.getObjCLifetime()) {
2613 case Qualifiers::OCL_None:
2614 case Qualifiers::OCL_ExplicitNone:
2616 case Qualifiers::OCL_Autoreleasing:
2617 case Qualifiers::OCL_Strong:
2618 case Qualifiers::OCL_Weak:
2619 return mangleObjCLifetime(PointeeType, Quals, Range);
2621 manglePointerCVQualifiers(Quals);
2622 manglePointerExtQualifiers(Quals, PointeeType);
2623 mangleType(PointeeType, Range);
2626 // <type> ::= <reference-type>
2627 // <reference-type> ::= A E? <cvr-qualifiers> <type>
2628 // # the E is required for 64-bit non-static lvalue references
2629 void MicrosoftCXXNameMangler::mangleType(const LValueReferenceType *T,
2630 Qualifiers Quals, SourceRange Range) {
2631 QualType PointeeType = T->getPointeeType();
2632 assert(!Quals.hasConst() && !Quals.hasVolatile() && "unexpected qualifier!");
2634 manglePointerExtQualifiers(Quals, PointeeType);
2635 mangleType(PointeeType, Range);
2638 // <type> ::= <r-value-reference-type>
2639 // <r-value-reference-type> ::= $$Q E? <cvr-qualifiers> <type>
2640 // # the E is required for 64-bit non-static rvalue references
2641 void MicrosoftCXXNameMangler::mangleType(const RValueReferenceType *T,
2642 Qualifiers Quals, SourceRange Range) {
2643 QualType PointeeType = T->getPointeeType();
2644 assert(!Quals.hasConst() && !Quals.hasVolatile() && "unexpected qualifier!");
2646 manglePointerExtQualifiers(Quals, PointeeType);
2647 mangleType(PointeeType, Range);
2650 void MicrosoftCXXNameMangler::mangleType(const ComplexType *T, Qualifiers,
2651 SourceRange Range) {
2652 QualType ElementType = T->getElementType();
2654 llvm::SmallString<64> TemplateMangling;
2655 llvm::raw_svector_ostream Stream(TemplateMangling);
2656 MicrosoftCXXNameMangler Extra(Context, Stream);
2658 Extra.mangleSourceName("_Complex");
2659 Extra.mangleType(ElementType, Range, QMM_Escape);
2661 mangleArtificialTagType(TTK_Struct, TemplateMangling, {"__clang"});
2664 // Returns true for types that mangleArtificialTagType() gets called for with
2665 // TTK_Union, TTK_Struct, TTK_Class and where compatibility with MSVC's
2666 // mangling matters.
2667 // (It doesn't matter for Objective-C types and the like that cl.exe doesn't
2669 bool MicrosoftCXXNameMangler::isArtificialTagType(QualType T) const {
2670 const Type *ty = T.getTypePtr();
2671 switch (ty->getTypeClass()) {
2675 case Type::Vector: {
2676 // For ABI compatibility only __m64, __m128(id), and __m256(id) matter,
2677 // but since mangleType(VectorType*) always calls mangleArtificialTagType()
2678 // just always return true (the other vector types are clang-only).
2684 void MicrosoftCXXNameMangler::mangleType(const VectorType *T, Qualifiers Quals,
2685 SourceRange Range) {
2686 const BuiltinType *ET = T->getElementType()->getAs<BuiltinType>();
2687 assert(ET && "vectors with non-builtin elements are unsupported");
2688 uint64_t Width = getASTContext().getTypeSize(T);
2689 // Pattern match exactly the typedefs in our intrinsic headers. Anything that
2690 // doesn't match the Intel types uses a custom mangling below.
2691 size_t OutSizeBefore = Out.tell();
2692 if (!isa<ExtVectorType>(T)) {
2693 llvm::Triple::ArchType AT =
2694 getASTContext().getTargetInfo().getTriple().getArch();
2695 if (AT == llvm::Triple::x86 || AT == llvm::Triple::x86_64) {
2696 if (Width == 64 && ET->getKind() == BuiltinType::LongLong) {
2697 mangleArtificialTagType(TTK_Union, "__m64");
2698 } else if (Width >= 128) {
2699 if (ET->getKind() == BuiltinType::Float)
2700 mangleArtificialTagType(TTK_Union, "__m" + llvm::utostr(Width));
2701 else if (ET->getKind() == BuiltinType::LongLong)
2702 mangleArtificialTagType(TTK_Union, "__m" + llvm::utostr(Width) + 'i');
2703 else if (ET->getKind() == BuiltinType::Double)
2704 mangleArtificialTagType(TTK_Struct, "__m" + llvm::utostr(Width) + 'd');
2709 bool IsBuiltin = Out.tell() != OutSizeBefore;
2711 // The MS ABI doesn't have a special mangling for vector types, so we define
2712 // our own mangling to handle uses of __vector_size__ on user-specified
2713 // types, and for extensions like __v4sf.
2715 llvm::SmallString<64> TemplateMangling;
2716 llvm::raw_svector_ostream Stream(TemplateMangling);
2717 MicrosoftCXXNameMangler Extra(Context, Stream);
2719 Extra.mangleSourceName("__vector");
2720 Extra.mangleType(QualType(ET, 0), Range, QMM_Escape);
2721 Extra.mangleIntegerLiteral(llvm::APSInt::getUnsigned(T->getNumElements()),
2722 /*IsBoolean=*/false);
2724 mangleArtificialTagType(TTK_Union, TemplateMangling, {"__clang"});
2728 void MicrosoftCXXNameMangler::mangleType(const ExtVectorType *T,
2729 Qualifiers Quals, SourceRange Range) {
2730 mangleType(static_cast<const VectorType *>(T), Quals, Range);
2733 void MicrosoftCXXNameMangler::mangleType(const DependentVectorType *T,
2734 Qualifiers, SourceRange Range) {
2735 DiagnosticsEngine &Diags = Context.getDiags();
2736 unsigned DiagID = Diags.getCustomDiagID(
2737 DiagnosticsEngine::Error,
2738 "cannot mangle this dependent-sized vector type yet");
2739 Diags.Report(Range.getBegin(), DiagID) << Range;
2742 void MicrosoftCXXNameMangler::mangleType(const DependentSizedExtVectorType *T,
2743 Qualifiers, SourceRange Range) {
2744 DiagnosticsEngine &Diags = Context.getDiags();
2745 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2746 "cannot mangle this dependent-sized extended vector type yet");
2747 Diags.Report(Range.getBegin(), DiagID)
2751 void MicrosoftCXXNameMangler::mangleType(const DependentAddressSpaceType *T,
2752 Qualifiers, SourceRange Range) {
2753 DiagnosticsEngine &Diags = Context.getDiags();
2754 unsigned DiagID = Diags.getCustomDiagID(
2755 DiagnosticsEngine::Error,
2756 "cannot mangle this dependent address space type yet");
2757 Diags.Report(Range.getBegin(), DiagID) << Range;
2760 void MicrosoftCXXNameMangler::mangleType(const ObjCInterfaceType *T, Qualifiers,
2762 // ObjC interfaces have structs underlying them.
2763 mangleTagTypeKind(TTK_Struct);
2764 mangleName(T->getDecl());
2767 void MicrosoftCXXNameMangler::mangleType(const ObjCObjectType *T,
2768 Qualifiers Quals, SourceRange Range) {
2769 if (T->isKindOfType())
2770 return mangleObjCKindOfType(T, Quals, Range);
2772 if (T->qual_empty() && !T->isSpecialized())
2773 return mangleType(T->getBaseType(), Range, QMM_Drop);
2775 ArgBackRefMap OuterFunArgsContext;
2776 ArgBackRefMap OuterTemplateArgsContext;
2777 BackRefVec OuterTemplateContext;
2779 FunArgBackReferences.swap(OuterFunArgsContext);
2780 TemplateArgBackReferences.swap(OuterTemplateArgsContext);
2781 NameBackReferences.swap(OuterTemplateContext);
2783 mangleTagTypeKind(TTK_Struct);
2787 mangleSourceName("objc_object");
2788 else if (T->isObjCClass())
2789 mangleSourceName("objc_class");
2791 mangleSourceName(T->getInterface()->getName());
2793 for (const auto &Q : T->quals())
2794 mangleObjCProtocol(Q);
2796 if (T->isSpecialized())
2797 for (const auto &TA : T->getTypeArgs())
2798 mangleType(TA, Range, QMM_Drop);
2804 FunArgBackReferences.swap(OuterFunArgsContext);
2805 TemplateArgBackReferences.swap(OuterTemplateArgsContext);
2806 NameBackReferences.swap(OuterTemplateContext);
2809 void MicrosoftCXXNameMangler::mangleType(const BlockPointerType *T,
2810 Qualifiers Quals, SourceRange Range) {
2811 QualType PointeeType = T->getPointeeType();
2812 manglePointerCVQualifiers(Quals);
2813 manglePointerExtQualifiers(Quals, PointeeType);
2817 mangleFunctionType(PointeeType->castAs<FunctionProtoType>());
2820 void MicrosoftCXXNameMangler::mangleType(const InjectedClassNameType *,
2821 Qualifiers, SourceRange) {
2822 llvm_unreachable("Cannot mangle injected class name type.");
2825 void MicrosoftCXXNameMangler::mangleType(const TemplateSpecializationType *T,
2826 Qualifiers, SourceRange Range) {
2827 DiagnosticsEngine &Diags = Context.getDiags();
2828 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2829 "cannot mangle this template specialization type yet");
2830 Diags.Report(Range.getBegin(), DiagID)
2834 void MicrosoftCXXNameMangler::mangleType(const DependentNameType *T, Qualifiers,
2835 SourceRange Range) {
2836 DiagnosticsEngine &Diags = Context.getDiags();
2837 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2838 "cannot mangle this dependent name type yet");
2839 Diags.Report(Range.getBegin(), DiagID)
2843 void MicrosoftCXXNameMangler::mangleType(
2844 const DependentTemplateSpecializationType *T, Qualifiers,
2845 SourceRange Range) {
2846 DiagnosticsEngine &Diags = Context.getDiags();
2847 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2848 "cannot mangle this dependent template specialization type yet");
2849 Diags.Report(Range.getBegin(), DiagID)
2853 void MicrosoftCXXNameMangler::mangleType(const PackExpansionType *T, Qualifiers,
2854 SourceRange Range) {
2855 DiagnosticsEngine &Diags = Context.getDiags();
2856 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2857 "cannot mangle this pack expansion yet");
2858 Diags.Report(Range.getBegin(), DiagID)
2862 void MicrosoftCXXNameMangler::mangleType(const TypeOfType *T, Qualifiers,
2863 SourceRange Range) {
2864 DiagnosticsEngine &Diags = Context.getDiags();
2865 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2866 "cannot mangle this typeof(type) yet");
2867 Diags.Report(Range.getBegin(), DiagID)
2871 void MicrosoftCXXNameMangler::mangleType(const TypeOfExprType *T, Qualifiers,
2872 SourceRange Range) {
2873 DiagnosticsEngine &Diags = Context.getDiags();
2874 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2875 "cannot mangle this typeof(expression) yet");
2876 Diags.Report(Range.getBegin(), DiagID)
2880 void MicrosoftCXXNameMangler::mangleType(const DecltypeType *T, Qualifiers,
2881 SourceRange Range) {
2882 DiagnosticsEngine &Diags = Context.getDiags();
2883 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2884 "cannot mangle this decltype() yet");
2885 Diags.Report(Range.getBegin(), DiagID)
2889 void MicrosoftCXXNameMangler::mangleType(const UnaryTransformType *T,
2890 Qualifiers, SourceRange Range) {
2891 DiagnosticsEngine &Diags = Context.getDiags();
2892 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2893 "cannot mangle this unary transform type yet");
2894 Diags.Report(Range.getBegin(), DiagID)
2898 void MicrosoftCXXNameMangler::mangleType(const AutoType *T, Qualifiers,
2899 SourceRange Range) {
2900 assert(T->getDeducedType().isNull() && "expecting a dependent type!");
2902 DiagnosticsEngine &Diags = Context.getDiags();
2903 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2904 "cannot mangle this 'auto' type yet");
2905 Diags.Report(Range.getBegin(), DiagID)
2909 void MicrosoftCXXNameMangler::mangleType(
2910 const DeducedTemplateSpecializationType *T, Qualifiers, SourceRange Range) {
2911 assert(T->getDeducedType().isNull() && "expecting a dependent type!");
2913 DiagnosticsEngine &Diags = Context.getDiags();
2914 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2915 "cannot mangle this deduced class template specialization type yet");
2916 Diags.Report(Range.getBegin(), DiagID)
2920 void MicrosoftCXXNameMangler::mangleType(const AtomicType *T, Qualifiers,
2921 SourceRange Range) {
2922 QualType ValueType = T->getValueType();
2924 llvm::SmallString<64> TemplateMangling;
2925 llvm::raw_svector_ostream Stream(TemplateMangling);
2926 MicrosoftCXXNameMangler Extra(Context, Stream);
2928 Extra.mangleSourceName("_Atomic");
2929 Extra.mangleType(ValueType, Range, QMM_Escape);
2931 mangleArtificialTagType(TTK_Struct, TemplateMangling, {"__clang"});
2934 void MicrosoftCXXNameMangler::mangleType(const PipeType *T, Qualifiers,
2935 SourceRange Range) {
2936 DiagnosticsEngine &Diags = Context.getDiags();
2937 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2938 "cannot mangle this OpenCL pipe type yet");
2939 Diags.Report(Range.getBegin(), DiagID)
2943 void MicrosoftMangleContextImpl::mangleCXXName(const NamedDecl *D,
2945 assert((isa<FunctionDecl>(D) || isa<VarDecl>(D)) &&
2946 "Invalid mangleName() call, argument is not a variable or function!");
2947 assert(!isa<CXXConstructorDecl>(D) && !isa<CXXDestructorDecl>(D) &&
2948 "Invalid mangleName() call on 'structor decl!");
2950 PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
2951 getASTContext().getSourceManager(),
2952 "Mangling declaration");
2954 msvc_hashing_ostream MHO(Out);
2955 MicrosoftCXXNameMangler Mangler(*this, MHO);
2956 return Mangler.mangle(D);
2959 // <this-adjustment> ::= <no-adjustment> | <static-adjustment> |
2960 // <virtual-adjustment>
2961 // <no-adjustment> ::= A # private near
2962 // ::= B # private far
2963 // ::= I # protected near
2964 // ::= J # protected far
2965 // ::= Q # public near
2966 // ::= R # public far
2967 // <static-adjustment> ::= G <static-offset> # private near
2968 // ::= H <static-offset> # private far
2969 // ::= O <static-offset> # protected near
2970 // ::= P <static-offset> # protected far
2971 // ::= W <static-offset> # public near
2972 // ::= X <static-offset> # public far
2973 // <virtual-adjustment> ::= $0 <virtual-shift> <static-offset> # private near
2974 // ::= $1 <virtual-shift> <static-offset> # private far
2975 // ::= $2 <virtual-shift> <static-offset> # protected near
2976 // ::= $3 <virtual-shift> <static-offset> # protected far
2977 // ::= $4 <virtual-shift> <static-offset> # public near
2978 // ::= $5 <virtual-shift> <static-offset> # public far
2979 // <virtual-shift> ::= <vtordisp-shift> | <vtordispex-shift>
2980 // <vtordisp-shift> ::= <offset-to-vtordisp>
2981 // <vtordispex-shift> ::= <offset-to-vbptr> <vbase-offset-offset>
2982 // <offset-to-vtordisp>
2983 static void mangleThunkThisAdjustment(AccessSpecifier AS,
2984 const ThisAdjustment &Adjustment,
2985 MicrosoftCXXNameMangler &Mangler,
2987 if (!Adjustment.Virtual.isEmpty()) {
2992 llvm_unreachable("Unsupported access specifier");
3002 if (Adjustment.Virtual.Microsoft.VBPtrOffset) {
3003 Out << 'R' << AccessSpec;
3004 Mangler.mangleNumber(
3005 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VBPtrOffset));
3006 Mangler.mangleNumber(
3007 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VBOffsetOffset));
3008 Mangler.mangleNumber(
3009 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VtordispOffset));
3010 Mangler.mangleNumber(static_cast<uint32_t>(Adjustment.NonVirtual));
3013 Mangler.mangleNumber(
3014 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VtordispOffset));
3015 Mangler.mangleNumber(-static_cast<uint32_t>(Adjustment.NonVirtual));
3017 } else if (Adjustment.NonVirtual != 0) {
3020 llvm_unreachable("Unsupported access specifier");
3030 Mangler.mangleNumber(-static_cast<uint32_t>(Adjustment.NonVirtual));
3034 llvm_unreachable("Unsupported access specifier");
3047 void MicrosoftMangleContextImpl::mangleVirtualMemPtrThunk(
3048 const CXXMethodDecl *MD, const MethodVFTableLocation &ML,
3050 msvc_hashing_ostream MHO(Out);
3051 MicrosoftCXXNameMangler Mangler(*this, MHO);
3052 Mangler.getStream() << '?';
3053 Mangler.mangleVirtualMemPtrThunk(MD, ML);
3056 void MicrosoftMangleContextImpl::mangleThunk(const CXXMethodDecl *MD,
3057 const ThunkInfo &Thunk,
3059 msvc_hashing_ostream MHO(Out);
3060 MicrosoftCXXNameMangler Mangler(*this, MHO);
3061 Mangler.getStream() << '?';
3062 Mangler.mangleName(MD);
3064 // Usually the thunk uses the access specifier of the new method, but if this
3065 // is a covariant return thunk, then MSVC always uses the public access
3066 // specifier, and we do the same.
3067 AccessSpecifier AS = Thunk.Return.isEmpty() ? MD->getAccess() : AS_public;
3068 mangleThunkThisAdjustment(AS, Thunk.This, Mangler, MHO);
3070 if (!Thunk.Return.isEmpty())
3071 assert(Thunk.Method != nullptr &&
3072 "Thunk info should hold the overridee decl");
3074 const CXXMethodDecl *DeclForFPT = Thunk.Method ? Thunk.Method : MD;
3075 Mangler.mangleFunctionType(
3076 DeclForFPT->getType()->castAs<FunctionProtoType>(), MD);
3079 void MicrosoftMangleContextImpl::mangleCXXDtorThunk(
3080 const CXXDestructorDecl *DD, CXXDtorType Type,
3081 const ThisAdjustment &Adjustment, raw_ostream &Out) {
3082 // FIXME: Actually, the dtor thunk should be emitted for vector deleting
3083 // dtors rather than scalar deleting dtors. Just use the vector deleting dtor
3084 // mangling manually until we support both deleting dtor types.
3085 assert(Type == Dtor_Deleting);
3086 msvc_hashing_ostream MHO(Out);
3087 MicrosoftCXXNameMangler Mangler(*this, MHO, DD, Type);
3088 Mangler.getStream() << "??_E";
3089 Mangler.mangleName(DD->getParent());
3090 mangleThunkThisAdjustment(DD->getAccess(), Adjustment, Mangler, MHO);
3091 Mangler.mangleFunctionType(DD->getType()->castAs<FunctionProtoType>(), DD);
3094 void MicrosoftMangleContextImpl::mangleCXXVFTable(
3095 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
3097 // <mangled-name> ::= ?_7 <class-name> <storage-class>
3098 // <cvr-qualifiers> [<name>] @
3099 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
3100 // is always '6' for vftables.
3101 msvc_hashing_ostream MHO(Out);
3102 MicrosoftCXXNameMangler Mangler(*this, MHO);
3103 if (Derived->hasAttr<DLLImportAttr>())
3104 Mangler.getStream() << "??_S";
3106 Mangler.getStream() << "??_7";
3107 Mangler.mangleName(Derived);
3108 Mangler.getStream() << "6B"; // '6' for vftable, 'B' for const.
3109 for (const CXXRecordDecl *RD : BasePath)
3110 Mangler.mangleName(RD);
3111 Mangler.getStream() << '@';
3114 void MicrosoftMangleContextImpl::mangleCXXVBTable(
3115 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
3117 // <mangled-name> ::= ?_8 <class-name> <storage-class>
3118 // <cvr-qualifiers> [<name>] @
3119 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
3120 // is always '7' for vbtables.
3121 msvc_hashing_ostream MHO(Out);
3122 MicrosoftCXXNameMangler Mangler(*this, MHO);
3123 Mangler.getStream() << "??_8";
3124 Mangler.mangleName(Derived);
3125 Mangler.getStream() << "7B"; // '7' for vbtable, 'B' for const.
3126 for (const CXXRecordDecl *RD : BasePath)
3127 Mangler.mangleName(RD);
3128 Mangler.getStream() << '@';
3131 void MicrosoftMangleContextImpl::mangleCXXRTTI(QualType T, raw_ostream &Out) {
3132 msvc_hashing_ostream MHO(Out);
3133 MicrosoftCXXNameMangler Mangler(*this, MHO);
3134 Mangler.getStream() << "??_R0";
3135 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
3136 Mangler.getStream() << "@8";
3139 void MicrosoftMangleContextImpl::mangleCXXRTTIName(QualType T,
3141 MicrosoftCXXNameMangler Mangler(*this, Out);
3142 Mangler.getStream() << '.';
3143 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
3146 void MicrosoftMangleContextImpl::mangleCXXVirtualDisplacementMap(
3147 const CXXRecordDecl *SrcRD, const CXXRecordDecl *DstRD, raw_ostream &Out) {
3148 msvc_hashing_ostream MHO(Out);
3149 MicrosoftCXXNameMangler Mangler(*this, MHO);
3150 Mangler.getStream() << "??_K";
3151 Mangler.mangleName(SrcRD);
3152 Mangler.getStream() << "$C";
3153 Mangler.mangleName(DstRD);
3156 void MicrosoftMangleContextImpl::mangleCXXThrowInfo(QualType T, bool IsConst,
3159 uint32_t NumEntries,
3161 msvc_hashing_ostream MHO(Out);
3162 MicrosoftCXXNameMangler Mangler(*this, MHO);
3163 Mangler.getStream() << "_TI";
3165 Mangler.getStream() << 'C';
3167 Mangler.getStream() << 'V';
3169 Mangler.getStream() << 'U';
3170 Mangler.getStream() << NumEntries;
3171 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
3174 void MicrosoftMangleContextImpl::mangleCXXCatchableTypeArray(
3175 QualType T, uint32_t NumEntries, raw_ostream &Out) {
3176 msvc_hashing_ostream MHO(Out);
3177 MicrosoftCXXNameMangler Mangler(*this, MHO);
3178 Mangler.getStream() << "_CTA";
3179 Mangler.getStream() << NumEntries;
3180 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
3183 void MicrosoftMangleContextImpl::mangleCXXCatchableType(
3184 QualType T, const CXXConstructorDecl *CD, CXXCtorType CT, uint32_t Size,
3185 uint32_t NVOffset, int32_t VBPtrOffset, uint32_t VBIndex,
3187 MicrosoftCXXNameMangler Mangler(*this, Out);
3188 Mangler.getStream() << "_CT";
3190 llvm::SmallString<64> RTTIMangling;
3192 llvm::raw_svector_ostream Stream(RTTIMangling);
3193 msvc_hashing_ostream MHO(Stream);
3194 mangleCXXRTTI(T, MHO);
3196 Mangler.getStream() << RTTIMangling;
3198 // VS2015 and VS2017.1 omit the copy-constructor in the mangled name but
3199 // both older and newer versions include it.
3200 // FIXME: It is known that the Ctor is present in 2013, and in 2017.7
3201 // (_MSC_VER 1914) and newer, and that it's omitted in 2015 and 2017.4
3202 // (_MSC_VER 1911), but it's unknown when exactly it reappeared (1914?
3203 // Or 1912, 1913 aleady?).
3204 bool OmitCopyCtor = getASTContext().getLangOpts().isCompatibleWithMSVC(
3205 LangOptions::MSVC2015) &&
3206 !getASTContext().getLangOpts().isCompatibleWithMSVC(
3207 LangOptions::MSVC2017_7);
3208 llvm::SmallString<64> CopyCtorMangling;
3209 if (!OmitCopyCtor && CD) {
3210 llvm::raw_svector_ostream Stream(CopyCtorMangling);
3211 msvc_hashing_ostream MHO(Stream);
3212 mangleCXXCtor(CD, CT, MHO);
3214 Mangler.getStream() << CopyCtorMangling;
3216 Mangler.getStream() << Size;
3217 if (VBPtrOffset == -1) {
3219 Mangler.getStream() << NVOffset;
3222 Mangler.getStream() << NVOffset;
3223 Mangler.getStream() << VBPtrOffset;
3224 Mangler.getStream() << VBIndex;
3228 void MicrosoftMangleContextImpl::mangleCXXRTTIBaseClassDescriptor(
3229 const CXXRecordDecl *Derived, uint32_t NVOffset, int32_t VBPtrOffset,
3230 uint32_t VBTableOffset, uint32_t Flags, raw_ostream &Out) {
3231 msvc_hashing_ostream MHO(Out);
3232 MicrosoftCXXNameMangler Mangler(*this, MHO);
3233 Mangler.getStream() << "??_R1";
3234 Mangler.mangleNumber(NVOffset);
3235 Mangler.mangleNumber(VBPtrOffset);
3236 Mangler.mangleNumber(VBTableOffset);
3237 Mangler.mangleNumber(Flags);
3238 Mangler.mangleName(Derived);
3239 Mangler.getStream() << "8";
3242 void MicrosoftMangleContextImpl::mangleCXXRTTIBaseClassArray(
3243 const CXXRecordDecl *Derived, raw_ostream &Out) {
3244 msvc_hashing_ostream MHO(Out);
3245 MicrosoftCXXNameMangler Mangler(*this, MHO);
3246 Mangler.getStream() << "??_R2";
3247 Mangler.mangleName(Derived);
3248 Mangler.getStream() << "8";
3251 void MicrosoftMangleContextImpl::mangleCXXRTTIClassHierarchyDescriptor(
3252 const CXXRecordDecl *Derived, raw_ostream &Out) {
3253 msvc_hashing_ostream MHO(Out);
3254 MicrosoftCXXNameMangler Mangler(*this, MHO);
3255 Mangler.getStream() << "??_R3";
3256 Mangler.mangleName(Derived);
3257 Mangler.getStream() << "8";
3260 void MicrosoftMangleContextImpl::mangleCXXRTTICompleteObjectLocator(
3261 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
3263 // <mangled-name> ::= ?_R4 <class-name> <storage-class>
3264 // <cvr-qualifiers> [<name>] @
3265 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
3266 // is always '6' for vftables.
3267 llvm::SmallString<64> VFTableMangling;
3268 llvm::raw_svector_ostream Stream(VFTableMangling);
3269 mangleCXXVFTable(Derived, BasePath, Stream);
3271 if (VFTableMangling.startswith("??@")) {
3272 assert(VFTableMangling.endswith("@"));
3273 Out << VFTableMangling << "??_R4@";
3277 assert(VFTableMangling.startswith("??_7") ||
3278 VFTableMangling.startswith("??_S"));
3280 Out << "??_R4" << StringRef(VFTableMangling).drop_front(4);
3283 void MicrosoftMangleContextImpl::mangleSEHFilterExpression(
3284 const NamedDecl *EnclosingDecl, raw_ostream &Out) {
3285 msvc_hashing_ostream MHO(Out);
3286 MicrosoftCXXNameMangler Mangler(*this, MHO);
3287 // The function body is in the same comdat as the function with the handler,
3288 // so the numbering here doesn't have to be the same across TUs.
3290 // <mangled-name> ::= ?filt$ <filter-number> @0
3291 Mangler.getStream() << "?filt$" << SEHFilterIds[EnclosingDecl]++ << "@0@";
3292 Mangler.mangleName(EnclosingDecl);
3295 void MicrosoftMangleContextImpl::mangleSEHFinallyBlock(
3296 const NamedDecl *EnclosingDecl, raw_ostream &Out) {
3297 msvc_hashing_ostream MHO(Out);
3298 MicrosoftCXXNameMangler Mangler(*this, MHO);
3299 // The function body is in the same comdat as the function with the handler,
3300 // so the numbering here doesn't have to be the same across TUs.
3302 // <mangled-name> ::= ?fin$ <filter-number> @0
3303 Mangler.getStream() << "?fin$" << SEHFinallyIds[EnclosingDecl]++ << "@0@";
3304 Mangler.mangleName(EnclosingDecl);
3307 void MicrosoftMangleContextImpl::mangleTypeName(QualType T, raw_ostream &Out) {
3308 // This is just a made up unique string for the purposes of tbaa. undname
3309 // does *not* know how to demangle it.
3310 MicrosoftCXXNameMangler Mangler(*this, Out);
3311 Mangler.getStream() << '?';
3312 Mangler.mangleType(T, SourceRange());
3315 void MicrosoftMangleContextImpl::mangleCXXCtor(const CXXConstructorDecl *D,
3318 msvc_hashing_ostream MHO(Out);
3319 MicrosoftCXXNameMangler mangler(*this, MHO, D, Type);
3323 void MicrosoftMangleContextImpl::mangleCXXDtor(const CXXDestructorDecl *D,
3326 msvc_hashing_ostream MHO(Out);
3327 MicrosoftCXXNameMangler mangler(*this, MHO, D, Type);
3331 void MicrosoftMangleContextImpl::mangleReferenceTemporary(
3332 const VarDecl *VD, unsigned ManglingNumber, raw_ostream &Out) {
3333 msvc_hashing_ostream MHO(Out);
3334 MicrosoftCXXNameMangler Mangler(*this, MHO);
3336 Mangler.getStream() << "?$RT" << ManglingNumber << '@';
3337 Mangler.mangle(VD, "");
3340 void MicrosoftMangleContextImpl::mangleThreadSafeStaticGuardVariable(
3341 const VarDecl *VD, unsigned GuardNum, raw_ostream &Out) {
3342 msvc_hashing_ostream MHO(Out);
3343 MicrosoftCXXNameMangler Mangler(*this, MHO);
3345 Mangler.getStream() << "?$TSS" << GuardNum << '@';
3346 Mangler.mangleNestedName(VD);
3347 Mangler.getStream() << "@4HA";
3350 void MicrosoftMangleContextImpl::mangleStaticGuardVariable(const VarDecl *VD,
3352 // <guard-name> ::= ?_B <postfix> @5 <scope-depth>
3353 // ::= ?__J <postfix> @5 <scope-depth>
3354 // ::= ?$S <guard-num> @ <postfix> @4IA
3356 // The first mangling is what MSVC uses to guard static locals in inline
3357 // functions. It uses a different mangling in external functions to support
3358 // guarding more than 32 variables. MSVC rejects inline functions with more
3359 // than 32 static locals. We don't fully implement the second mangling
3360 // because those guards are not externally visible, and instead use LLVM's
3361 // default renaming when creating a new guard variable.
3362 msvc_hashing_ostream MHO(Out);
3363 MicrosoftCXXNameMangler Mangler(*this, MHO);
3365 bool Visible = VD->isExternallyVisible();
3367 Mangler.getStream() << (VD->getTLSKind() ? "??__J" : "??_B");
3369 Mangler.getStream() << "?$S1@";
3371 unsigned ScopeDepth = 0;
3372 if (Visible && !getNextDiscriminator(VD, ScopeDepth))
3373 // If we do not have a discriminator and are emitting a guard variable for
3374 // use at global scope, then mangling the nested name will not be enough to
3375 // remove ambiguities.
3376 Mangler.mangle(VD, "");
3378 Mangler.mangleNestedName(VD);
3379 Mangler.getStream() << (Visible ? "@5" : "@4IA");
3381 Mangler.mangleNumber(ScopeDepth);
3384 void MicrosoftMangleContextImpl::mangleInitFiniStub(const VarDecl *D,
3387 msvc_hashing_ostream MHO(Out);
3388 MicrosoftCXXNameMangler Mangler(*this, MHO);
3389 Mangler.getStream() << "??__" << CharCode;
3390 if (D->isStaticDataMember()) {
3391 Mangler.getStream() << '?';
3392 Mangler.mangleName(D);
3393 Mangler.mangleVariableEncoding(D);
3394 Mangler.getStream() << "@@";
3396 Mangler.mangleName(D);
3398 // This is the function class mangling. These stubs are global, non-variadic,
3399 // cdecl functions that return void and take no args.
3400 Mangler.getStream() << "YAXXZ";
3403 void MicrosoftMangleContextImpl::mangleDynamicInitializer(const VarDecl *D,
3405 // <initializer-name> ::= ?__E <name> YAXXZ
3406 mangleInitFiniStub(D, 'E', Out);
3410 MicrosoftMangleContextImpl::mangleDynamicAtExitDestructor(const VarDecl *D,
3412 // <destructor-name> ::= ?__F <name> YAXXZ
3413 mangleInitFiniStub(D, 'F', Out);
3416 void MicrosoftMangleContextImpl::mangleStringLiteral(const StringLiteral *SL,
3418 // <char-type> ::= 0 # char, char16_t, char32_t
3419 // # (little endian char data in mangling)
3420 // ::= 1 # wchar_t (big endian char data in mangling)
3422 // <literal-length> ::= <non-negative integer> # the length of the literal
3424 // <encoded-crc> ::= <hex digit>+ @ # crc of the literal including
3425 // # trailing null bytes
3427 // <encoded-string> ::= <simple character> # uninteresting character
3428 // ::= '?$' <hex digit> <hex digit> # these two nibbles
3429 // # encode the byte for the
3431 // ::= '?' [a-z] # \xe1 - \xfa
3432 // ::= '?' [A-Z] # \xc1 - \xda
3433 // ::= '?' [0-9] # [,/\:. \n\t'-]
3435 // <literal> ::= '??_C@_' <char-type> <literal-length> <encoded-crc>
3436 // <encoded-string> '@'
3437 MicrosoftCXXNameMangler Mangler(*this, Out);
3438 Mangler.getStream() << "??_C@_";
3440 // The actual string length might be different from that of the string literal
3442 // char foo[3] = "foobar";
3443 // char bar[42] = "foobar";
3444 // Where it is truncated or zero-padded to fit the array. This is the length
3445 // used for mangling, and any trailing null-bytes also need to be mangled.
3446 unsigned StringLength = getASTContext()
3447 .getAsConstantArrayType(SL->getType())
3450 unsigned StringByteLength = StringLength * SL->getCharByteWidth();
3452 // <char-type>: The "kind" of string literal is encoded into the mangled name.
3454 Mangler.getStream() << '1';
3456 Mangler.getStream() << '0';
3458 // <literal-length>: The next part of the mangled name consists of the length
3459 // of the string in bytes.
3460 Mangler.mangleNumber(StringByteLength);
3462 auto GetLittleEndianByte = [&SL](unsigned Index) {
3463 unsigned CharByteWidth = SL->getCharByteWidth();
3464 if (Index / CharByteWidth >= SL->getLength())
3465 return static_cast<char>(0);
3466 uint32_t CodeUnit = SL->getCodeUnit(Index / CharByteWidth);
3467 unsigned OffsetInCodeUnit = Index % CharByteWidth;
3468 return static_cast<char>((CodeUnit >> (8 * OffsetInCodeUnit)) & 0xff);
3471 auto GetBigEndianByte = [&SL](unsigned Index) {
3472 unsigned CharByteWidth = SL->getCharByteWidth();
3473 if (Index / CharByteWidth >= SL->getLength())
3474 return static_cast<char>(0);
3475 uint32_t CodeUnit = SL->getCodeUnit(Index / CharByteWidth);
3476 unsigned OffsetInCodeUnit = (CharByteWidth - 1) - (Index % CharByteWidth);
3477 return static_cast<char>((CodeUnit >> (8 * OffsetInCodeUnit)) & 0xff);
3480 // CRC all the bytes of the StringLiteral.
3482 for (unsigned I = 0, E = StringByteLength; I != E; ++I)
3483 JC.update(GetLittleEndianByte(I));
3485 // <encoded-crc>: The CRC is encoded utilizing the standard number mangling
3487 Mangler.mangleNumber(JC.getCRC());
3489 // <encoded-string>: The mangled name also contains the first 32 bytes
3490 // (including null-terminator bytes) of the encoded StringLiteral.
3491 // Each character is encoded by splitting them into bytes and then encoding
3492 // the constituent bytes.
3493 auto MangleByte = [&Mangler](char Byte) {
3494 // There are five different manglings for characters:
3495 // - [a-zA-Z0-9_$]: A one-to-one mapping.
3496 // - ?[a-z]: The range from \xe1 to \xfa.
3497 // - ?[A-Z]: The range from \xc1 to \xda.
3498 // - ?[0-9]: The set of [,/\:. \n\t'-].
3499 // - ?$XX: A fallback which maps nibbles.
3500 if (isIdentifierBody(Byte, /*AllowDollar=*/true)) {
3501 Mangler.getStream() << Byte;
3502 } else if (isLetter(Byte & 0x7f)) {
3503 Mangler.getStream() << '?' << static_cast<char>(Byte & 0x7f);
3505 const char SpecialChars[] = {',', '/', '\\', ':', '.',
3506 ' ', '\n', '\t', '\'', '-'};
3507 const char *Pos = llvm::find(SpecialChars, Byte);
3508 if (Pos != std::end(SpecialChars)) {
3509 Mangler.getStream() << '?' << (Pos - std::begin(SpecialChars));
3511 Mangler.getStream() << "?$";
3512 Mangler.getStream() << static_cast<char>('A' + ((Byte >> 4) & 0xf));
3513 Mangler.getStream() << static_cast<char>('A' + (Byte & 0xf));
3518 // Enforce our 32 bytes max, except wchar_t which gets 32 chars instead.
3519 unsigned MaxBytesToMangle = SL->isWide() ? 64U : 32U;
3520 unsigned NumBytesToMangle = std::min(MaxBytesToMangle, StringByteLength);
3521 for (unsigned I = 0; I != NumBytesToMangle; ++I) {
3523 MangleByte(GetBigEndianByte(I));
3525 MangleByte(GetLittleEndianByte(I));
3528 Mangler.getStream() << '@';
3531 MicrosoftMangleContext *
3532 MicrosoftMangleContext::create(ASTContext &Context, DiagnosticsEngine &Diags) {
3533 return new MicrosoftMangleContextImpl(Context, Diags);