Bug Summary

File:clang/lib/AST/MicrosoftMangle.cpp
Warning:line 3130, column 7
Called C++ object pointer is null

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name MicrosoftMangle.cpp -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -mframe-pointer=none -relaxed-aliasing -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -ffunction-sections -fdata-sections -fcoverage-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/build-llvm/tools/clang/lib/AST -resource-dir /usr/lib/llvm-13/lib/clang/13.0.0 -D CLANG_ROUND_TRIP_CC1_ARGS=ON -D _DEBUG -D _GNU_SOURCE -D __STDC_CONSTANT_MACROS -D __STDC_FORMAT_MACROS -D __STDC_LIMIT_MACROS -I /build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/build-llvm/tools/clang/lib/AST -I /build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST -I /build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/include -I /build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/build-llvm/tools/clang/include -I /build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/build-llvm/include -I /build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/llvm/include -D NDEBUG -U NDEBUG -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/x86_64-linux-gnu/c++/10 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../include/c++/10/backward -internal-isystem /usr/lib/llvm-13/lib/clang/13.0.0/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/10/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-unused-parameter -Wwrite-strings -Wno-missing-field-initializers -Wno-long-long -Wno-maybe-uninitialized -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wno-comment -std=c++14 -fdeprecated-macro -fdebug-compilation-dir=/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/build-llvm/tools/clang/lib/AST -fdebug-prefix-map=/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82=. -ferror-limit 19 -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -vectorize-loops -vectorize-slp -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2021-06-21-164211-33944-1 -x c++ /build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp
1//===--- MicrosoftMangle.cpp - Microsoft Visual C++ Name Mangling ---------===//
2//
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
6//
7//===----------------------------------------------------------------------===//
8//
9// This provides C++ name mangling targeting the Microsoft Visual C++ ABI.
10//
11//===----------------------------------------------------------------------===//
12
13#include "clang/AST/ASTContext.h"
14#include "clang/AST/Attr.h"
15#include "clang/AST/CXXInheritance.h"
16#include "clang/AST/CharUnits.h"
17#include "clang/AST/Decl.h"
18#include "clang/AST/DeclCXX.h"
19#include "clang/AST/DeclObjC.h"
20#include "clang/AST/DeclOpenMP.h"
21#include "clang/AST/DeclTemplate.h"
22#include "clang/AST/Expr.h"
23#include "clang/AST/ExprCXX.h"
24#include "clang/AST/Mangle.h"
25#include "clang/AST/VTableBuilder.h"
26#include "clang/Basic/ABI.h"
27#include "clang/Basic/DiagnosticOptions.h"
28#include "clang/Basic/FileManager.h"
29#include "clang/Basic/SourceManager.h"
30#include "clang/Basic/TargetInfo.h"
31#include "llvm/ADT/StringExtras.h"
32#include "llvm/Support/CRC.h"
33#include "llvm/Support/MD5.h"
34#include "llvm/Support/MathExtras.h"
35#include "llvm/Support/StringSaver.h"
36#include "llvm/Support/xxhash.h"
37
38using namespace clang;
39
40namespace {
41
42struct msvc_hashing_ostream : public llvm::raw_svector_ostream {
43 raw_ostream &OS;
44 llvm::SmallString<64> Buffer;
45
46 msvc_hashing_ostream(raw_ostream &OS)
47 : llvm::raw_svector_ostream(Buffer), OS(OS) {}
48 ~msvc_hashing_ostream() override {
49 StringRef MangledName = str();
50 bool StartsWithEscape = MangledName.startswith("\01");
51 if (StartsWithEscape)
52 MangledName = MangledName.drop_front(1);
53 if (MangledName.size() < 4096) {
54 OS << str();
55 return;
56 }
57
58 llvm::MD5 Hasher;
59 llvm::MD5::MD5Result Hash;
60 Hasher.update(MangledName);
61 Hasher.final(Hash);
62
63 SmallString<32> HexString;
64 llvm::MD5::stringifyResult(Hash, HexString);
65
66 if (StartsWithEscape)
67 OS << '\01';
68 OS << "??@" << HexString << '@';
69 }
70};
71
72static const DeclContext *
73getLambdaDefaultArgumentDeclContext(const Decl *D) {
74 if (const auto *RD = dyn_cast<CXXRecordDecl>(D))
75 if (RD->isLambda())
76 if (const auto *Parm =
77 dyn_cast_or_null<ParmVarDecl>(RD->getLambdaContextDecl()))
78 return Parm->getDeclContext();
79 return nullptr;
80}
81
82/// Retrieve the declaration context that should be used when mangling
83/// the given declaration.
84static const DeclContext *getEffectiveDeclContext(const Decl *D) {
85 // The ABI assumes that lambda closure types that occur within
86 // default arguments live in the context of the function. However, due to
87 // the way in which Clang parses and creates function declarations, this is
88 // not the case: the lambda closure type ends up living in the context
89 // where the function itself resides, because the function declaration itself
90 // had not yet been created. Fix the context here.
91 if (const auto *LDADC = getLambdaDefaultArgumentDeclContext(D))
92 return LDADC;
93
94 // Perform the same check for block literals.
95 if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
96 if (ParmVarDecl *ContextParam =
97 dyn_cast_or_null<ParmVarDecl>(BD->getBlockManglingContextDecl()))
98 return ContextParam->getDeclContext();
99 }
100
101 const DeclContext *DC = D->getDeclContext();
102 if (isa<CapturedDecl>(DC) || isa<OMPDeclareReductionDecl>(DC) ||
103 isa<OMPDeclareMapperDecl>(DC)) {
104 return getEffectiveDeclContext(cast<Decl>(DC));
105 }
106
107 return DC->getRedeclContext();
108}
109
110static const DeclContext *getEffectiveParentContext(const DeclContext *DC) {
111 return getEffectiveDeclContext(cast<Decl>(DC));
112}
113
114static const FunctionDecl *getStructor(const NamedDecl *ND) {
115 if (const auto *FTD = dyn_cast<FunctionTemplateDecl>(ND))
116 return FTD->getTemplatedDecl()->getCanonicalDecl();
117
118 const auto *FD = cast<FunctionDecl>(ND);
119 if (const auto *FTD = FD->getPrimaryTemplate())
120 return FTD->getTemplatedDecl()->getCanonicalDecl();
121
122 return FD->getCanonicalDecl();
123}
124
125/// MicrosoftMangleContextImpl - Overrides the default MangleContext for the
126/// Microsoft Visual C++ ABI.
127class MicrosoftMangleContextImpl : public MicrosoftMangleContext {
128 typedef std::pair<const DeclContext *, IdentifierInfo *> DiscriminatorKeyTy;
129 llvm::DenseMap<DiscriminatorKeyTy, unsigned> Discriminator;
130 llvm::DenseMap<const NamedDecl *, unsigned> Uniquifier;
131 llvm::DenseMap<const CXXRecordDecl *, unsigned> LambdaIds;
132 llvm::DenseMap<const NamedDecl *, unsigned> SEHFilterIds;
133 llvm::DenseMap<const NamedDecl *, unsigned> SEHFinallyIds;
134 SmallString<16> AnonymousNamespaceHash;
135
136public:
137 MicrosoftMangleContextImpl(ASTContext &Context, DiagnosticsEngine &Diags);
138 bool shouldMangleCXXName(const NamedDecl *D) override;
139 bool shouldMangleStringLiteral(const StringLiteral *SL) override;
140 void mangleCXXName(GlobalDecl GD, raw_ostream &Out) override;
141 void mangleVirtualMemPtrThunk(const CXXMethodDecl *MD,
142 const MethodVFTableLocation &ML,
143 raw_ostream &Out) override;
144 void mangleThunk(const CXXMethodDecl *MD, const ThunkInfo &Thunk,
145 raw_ostream &) override;
146 void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type,
147 const ThisAdjustment &ThisAdjustment,
148 raw_ostream &) override;
149 void mangleCXXVFTable(const CXXRecordDecl *Derived,
150 ArrayRef<const CXXRecordDecl *> BasePath,
151 raw_ostream &Out) override;
152 void mangleCXXVBTable(const CXXRecordDecl *Derived,
153 ArrayRef<const CXXRecordDecl *> BasePath,
154 raw_ostream &Out) override;
155 void mangleCXXVirtualDisplacementMap(const CXXRecordDecl *SrcRD,
156 const CXXRecordDecl *DstRD,
157 raw_ostream &Out) override;
158 void mangleCXXThrowInfo(QualType T, bool IsConst, bool IsVolatile,
159 bool IsUnaligned, uint32_t NumEntries,
160 raw_ostream &Out) override;
161 void mangleCXXCatchableTypeArray(QualType T, uint32_t NumEntries,
162 raw_ostream &Out) override;
163 void mangleCXXCatchableType(QualType T, const CXXConstructorDecl *CD,
164 CXXCtorType CT, uint32_t Size, uint32_t NVOffset,
165 int32_t VBPtrOffset, uint32_t VBIndex,
166 raw_ostream &Out) override;
167 void mangleCXXRTTI(QualType T, raw_ostream &Out) override;
168 void mangleCXXRTTIName(QualType T, raw_ostream &Out) override;
169 void mangleCXXRTTIBaseClassDescriptor(const CXXRecordDecl *Derived,
170 uint32_t NVOffset, int32_t VBPtrOffset,
171 uint32_t VBTableOffset, uint32_t Flags,
172 raw_ostream &Out) override;
173 void mangleCXXRTTIBaseClassArray(const CXXRecordDecl *Derived,
174 raw_ostream &Out) override;
175 void mangleCXXRTTIClassHierarchyDescriptor(const CXXRecordDecl *Derived,
176 raw_ostream &Out) override;
177 void
178 mangleCXXRTTICompleteObjectLocator(const CXXRecordDecl *Derived,
179 ArrayRef<const CXXRecordDecl *> BasePath,
180 raw_ostream &Out) override;
181 void mangleTypeName(QualType T, raw_ostream &) override;
182 void mangleReferenceTemporary(const VarDecl *, unsigned ManglingNumber,
183 raw_ostream &) override;
184 void mangleStaticGuardVariable(const VarDecl *D, raw_ostream &Out) override;
185 void mangleThreadSafeStaticGuardVariable(const VarDecl *D, unsigned GuardNum,
186 raw_ostream &Out) override;
187 void mangleDynamicInitializer(const VarDecl *D, raw_ostream &Out) override;
188 void mangleDynamicAtExitDestructor(const VarDecl *D,
189 raw_ostream &Out) override;
190 void mangleSEHFilterExpression(const NamedDecl *EnclosingDecl,
191 raw_ostream &Out) override;
192 void mangleSEHFinallyBlock(const NamedDecl *EnclosingDecl,
193 raw_ostream &Out) override;
194 void mangleStringLiteral(const StringLiteral *SL, raw_ostream &Out) override;
195 bool getNextDiscriminator(const NamedDecl *ND, unsigned &disc) {
196 const DeclContext *DC = getEffectiveDeclContext(ND);
197 if (!DC->isFunctionOrMethod())
198 return false;
199
200 // Lambda closure types are already numbered, give out a phony number so
201 // that they demangle nicely.
202 if (const auto *RD = dyn_cast<CXXRecordDecl>(ND)) {
203 if (RD->isLambda()) {
204 disc = 1;
205 return true;
206 }
207 }
208
209 // Use the canonical number for externally visible decls.
210 if (ND->isExternallyVisible()) {
211 disc = getASTContext().getManglingNumber(ND);
212 return true;
213 }
214
215 // Anonymous tags are already numbered.
216 if (const TagDecl *Tag = dyn_cast<TagDecl>(ND)) {
217 if (!Tag->hasNameForLinkage() &&
218 !getASTContext().getDeclaratorForUnnamedTagDecl(Tag) &&
219 !getASTContext().getTypedefNameForUnnamedTagDecl(Tag))
220 return false;
221 }
222
223 // Make up a reasonable number for internal decls.
224 unsigned &discriminator = Uniquifier[ND];
225 if (!discriminator)
226 discriminator = ++Discriminator[std::make_pair(DC, ND->getIdentifier())];
227 disc = discriminator + 1;
228 return true;
229 }
230
231 std::string getLambdaString(const CXXRecordDecl *Lambda) override {
232 assert(Lambda->isLambda() && "RD must be a lambda!")(static_cast <bool> (Lambda->isLambda() && "RD must be a lambda!"
) ? void (0) : __assert_fail ("Lambda->isLambda() && \"RD must be a lambda!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 232, __extension__ __PRETTY_FUNCTION__))
;
233 std::string Name("<lambda_");
234
235 Decl *LambdaContextDecl = Lambda->getLambdaContextDecl();
236 unsigned LambdaManglingNumber = Lambda->getLambdaManglingNumber();
237 unsigned LambdaId;
238 const ParmVarDecl *Parm = dyn_cast_or_null<ParmVarDecl>(LambdaContextDecl);
239 const FunctionDecl *Func =
240 Parm ? dyn_cast<FunctionDecl>(Parm->getDeclContext()) : nullptr;
241
242 if (Func) {
243 unsigned DefaultArgNo =
244 Func->getNumParams() - Parm->getFunctionScopeIndex();
245 Name += llvm::utostr(DefaultArgNo);
246 Name += "_";
247 }
248
249 if (LambdaManglingNumber)
250 LambdaId = LambdaManglingNumber;
251 else
252 LambdaId = getLambdaIdForDebugInfo(Lambda);
253
254 Name += llvm::utostr(LambdaId);
255 Name += ">";
256 return Name;
257 }
258
259 unsigned getLambdaId(const CXXRecordDecl *RD) {
260 assert(RD->isLambda() && "RD must be a lambda!")(static_cast <bool> (RD->isLambda() && "RD must be a lambda!"
) ? void (0) : __assert_fail ("RD->isLambda() && \"RD must be a lambda!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 260, __extension__ __PRETTY_FUNCTION__))
;
261 assert(!RD->isExternallyVisible() && "RD must not be visible!")(static_cast <bool> (!RD->isExternallyVisible() &&
"RD must not be visible!") ? void (0) : __assert_fail ("!RD->isExternallyVisible() && \"RD must not be visible!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 261, __extension__ __PRETTY_FUNCTION__))
;
262 assert(RD->getLambdaManglingNumber() == 0 &&(static_cast <bool> (RD->getLambdaManglingNumber() ==
0 && "RD must not have a mangling number!") ? void (
0) : __assert_fail ("RD->getLambdaManglingNumber() == 0 && \"RD must not have a mangling number!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 263, __extension__ __PRETTY_FUNCTION__))
263 "RD must not have a mangling number!")(static_cast <bool> (RD->getLambdaManglingNumber() ==
0 && "RD must not have a mangling number!") ? void (
0) : __assert_fail ("RD->getLambdaManglingNumber() == 0 && \"RD must not have a mangling number!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 263, __extension__ __PRETTY_FUNCTION__))
;
264 std::pair<llvm::DenseMap<const CXXRecordDecl *, unsigned>::iterator, bool>
265 Result = LambdaIds.insert(std::make_pair(RD, LambdaIds.size()));
266 return Result.first->second;
267 }
268
269 unsigned getLambdaIdForDebugInfo(const CXXRecordDecl *RD) {
270 assert(RD->isLambda() && "RD must be a lambda!")(static_cast <bool> (RD->isLambda() && "RD must be a lambda!"
) ? void (0) : __assert_fail ("RD->isLambda() && \"RD must be a lambda!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 270, __extension__ __PRETTY_FUNCTION__))
;
271 assert(!RD->isExternallyVisible() && "RD must not be visible!")(static_cast <bool> (!RD->isExternallyVisible() &&
"RD must not be visible!") ? void (0) : __assert_fail ("!RD->isExternallyVisible() && \"RD must not be visible!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 271, __extension__ __PRETTY_FUNCTION__))
;
272 assert(RD->getLambdaManglingNumber() == 0 &&(static_cast <bool> (RD->getLambdaManglingNumber() ==
0 && "RD must not have a mangling number!") ? void (
0) : __assert_fail ("RD->getLambdaManglingNumber() == 0 && \"RD must not have a mangling number!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 273, __extension__ __PRETTY_FUNCTION__))
273 "RD must not have a mangling number!")(static_cast <bool> (RD->getLambdaManglingNumber() ==
0 && "RD must not have a mangling number!") ? void (
0) : __assert_fail ("RD->getLambdaManglingNumber() == 0 && \"RD must not have a mangling number!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 273, __extension__ __PRETTY_FUNCTION__))
;
274 llvm::DenseMap<const CXXRecordDecl *, unsigned>::iterator Result =
275 LambdaIds.find(RD);
276 // The lambda should exist, but return 0 in case it doesn't.
277 if (Result == LambdaIds.end())
278 return 0;
279 return Result->second;
280 }
281
282 /// Return a character sequence that is (somewhat) unique to the TU suitable
283 /// for mangling anonymous namespaces.
284 StringRef getAnonymousNamespaceHash() const {
285 return AnonymousNamespaceHash;
286 }
287
288private:
289 void mangleInitFiniStub(const VarDecl *D, char CharCode, raw_ostream &Out);
290};
291
292/// MicrosoftCXXNameMangler - Manage the mangling of a single name for the
293/// Microsoft Visual C++ ABI.
294class MicrosoftCXXNameMangler {
295 MicrosoftMangleContextImpl &Context;
296 raw_ostream &Out;
297
298 /// The "structor" is the top-level declaration being mangled, if
299 /// that's not a template specialization; otherwise it's the pattern
300 /// for that specialization.
301 const NamedDecl *Structor;
302 unsigned StructorType;
303
304 typedef llvm::SmallVector<std::string, 10> BackRefVec;
305 BackRefVec NameBackReferences;
306
307 typedef llvm::DenseMap<const void *, unsigned> ArgBackRefMap;
308 ArgBackRefMap FunArgBackReferences;
309 ArgBackRefMap TemplateArgBackReferences;
310
311 typedef llvm::DenseMap<const void *, StringRef> TemplateArgStringMap;
312 TemplateArgStringMap TemplateArgStrings;
313 llvm::StringSaver TemplateArgStringStorage;
314 llvm::BumpPtrAllocator TemplateArgStringStorageAlloc;
315
316 typedef std::set<std::pair<int, bool>> PassObjectSizeArgsSet;
317 PassObjectSizeArgsSet PassObjectSizeArgs;
318
319 ASTContext &getASTContext() const { return Context.getASTContext(); }
320
321 const bool PointersAre64Bit;
322
323public:
324 enum QualifierMangleMode { QMM_Drop, QMM_Mangle, QMM_Escape, QMM_Result };
325
326 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_)
327 : Context(C), Out(Out_), Structor(nullptr), StructorType(-1),
328 TemplateArgStringStorage(TemplateArgStringStorageAlloc),
329 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
330 64) {}
331
332 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_,
333 const CXXConstructorDecl *D, CXXCtorType Type)
334 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
335 TemplateArgStringStorage(TemplateArgStringStorageAlloc),
336 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
337 64) {}
338
339 MicrosoftCXXNameMangler(MicrosoftMangleContextImpl &C, raw_ostream &Out_,
340 const CXXDestructorDecl *D, CXXDtorType Type)
341 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
342 TemplateArgStringStorage(TemplateArgStringStorageAlloc),
343 PointersAre64Bit(C.getASTContext().getTargetInfo().getPointerWidth(0) ==
344 64) {}
345
346 raw_ostream &getStream() const { return Out; }
347
348 void mangle(const NamedDecl *D, StringRef Prefix = "?");
349 void mangleName(const NamedDecl *ND);
350 void mangleFunctionEncoding(const FunctionDecl *FD, bool ShouldMangle);
351 void mangleVariableEncoding(const VarDecl *VD);
352 void mangleMemberDataPointer(const CXXRecordDecl *RD, const ValueDecl *VD,
353 StringRef Prefix = "$");
354 void mangleMemberFunctionPointer(const CXXRecordDecl *RD,
355 const CXXMethodDecl *MD,
356 StringRef Prefix = "$");
357 void mangleVirtualMemPtrThunk(const CXXMethodDecl *MD,
358 const MethodVFTableLocation &ML);
359 void mangleNumber(int64_t Number);
360 void mangleNumber(llvm::APSInt Number);
361 void mangleFloat(llvm::APFloat Number);
362 void mangleBits(llvm::APInt Number);
363 void mangleTagTypeKind(TagTypeKind TK);
364 void mangleArtificialTagType(TagTypeKind TK, StringRef UnqualifiedName,
365 ArrayRef<StringRef> NestedNames = None);
366 void mangleAddressSpaceType(QualType T, Qualifiers Quals, SourceRange Range);
367 void mangleType(QualType T, SourceRange Range,
368 QualifierMangleMode QMM = QMM_Mangle);
369 void mangleFunctionType(const FunctionType *T,
370 const FunctionDecl *D = nullptr,
371 bool ForceThisQuals = false,
372 bool MangleExceptionSpec = true);
373 void mangleNestedName(const NamedDecl *ND);
374
375private:
376 bool isStructorDecl(const NamedDecl *ND) const {
377 return ND == Structor || getStructor(ND) == Structor;
378 }
379
380 bool is64BitPointer(Qualifiers Quals) const {
381 LangAS AddrSpace = Quals.getAddressSpace();
382 return AddrSpace == LangAS::ptr64 ||
383 (PointersAre64Bit && !(AddrSpace == LangAS::ptr32_sptr ||
384 AddrSpace == LangAS::ptr32_uptr));
385 }
386
387 void mangleUnqualifiedName(const NamedDecl *ND) {
388 mangleUnqualifiedName(ND, ND->getDeclName());
389 }
390 void mangleUnqualifiedName(const NamedDecl *ND, DeclarationName Name);
391 void mangleSourceName(StringRef Name);
392 void mangleOperatorName(OverloadedOperatorKind OO, SourceLocation Loc);
393 void mangleCXXDtorType(CXXDtorType T);
394 void mangleQualifiers(Qualifiers Quals, bool IsMember);
395 void mangleRefQualifier(RefQualifierKind RefQualifier);
396 void manglePointerCVQualifiers(Qualifiers Quals);
397 void manglePointerExtQualifiers(Qualifiers Quals, QualType PointeeType);
398
399 void mangleUnscopedTemplateName(const TemplateDecl *ND);
400 void
401 mangleTemplateInstantiationName(const TemplateDecl *TD,
402 const TemplateArgumentList &TemplateArgs);
403 void mangleObjCMethodName(const ObjCMethodDecl *MD);
404
405 void mangleFunctionArgumentType(QualType T, SourceRange Range);
406 void manglePassObjectSizeArg(const PassObjectSizeAttr *POSA);
407
408 bool isArtificialTagType(QualType T) const;
409
410 // Declare manglers for every type class.
411#define ABSTRACT_TYPE(CLASS, PARENT)
412#define NON_CANONICAL_TYPE(CLASS, PARENT)
413#define TYPE(CLASS, PARENT) void mangleType(const CLASS##Type *T, \
414 Qualifiers Quals, \
415 SourceRange Range);
416#include "clang/AST/TypeNodes.inc"
417#undef ABSTRACT_TYPE
418#undef NON_CANONICAL_TYPE
419#undef TYPE
420
421 void mangleType(const TagDecl *TD);
422 void mangleDecayedArrayType(const ArrayType *T);
423 void mangleArrayType(const ArrayType *T);
424 void mangleFunctionClass(const FunctionDecl *FD);
425 void mangleCallingConvention(CallingConv CC);
426 void mangleCallingConvention(const FunctionType *T);
427 void mangleIntegerLiteral(const llvm::APSInt &Number,
428 const NonTypeTemplateParmDecl *PD = nullptr,
429 QualType TemplateArgType = QualType());
430 void mangleExpression(const Expr *E, const NonTypeTemplateParmDecl *PD);
431 void mangleThrowSpecification(const FunctionProtoType *T);
432
433 void mangleTemplateArgs(const TemplateDecl *TD,
434 const TemplateArgumentList &TemplateArgs);
435 void mangleTemplateArg(const TemplateDecl *TD, const TemplateArgument &TA,
436 const NamedDecl *Parm);
437 void mangleTemplateArgValue(QualType T, const APValue &V,
438 bool WithScalarType = false);
439
440 void mangleObjCProtocol(const ObjCProtocolDecl *PD);
441 void mangleObjCLifetime(const QualType T, Qualifiers Quals,
442 SourceRange Range);
443 void mangleObjCKindOfType(const ObjCObjectType *T, Qualifiers Quals,
444 SourceRange Range);
445};
446}
447
448MicrosoftMangleContextImpl::MicrosoftMangleContextImpl(ASTContext &Context,
449 DiagnosticsEngine &Diags)
450 : MicrosoftMangleContext(Context, Diags) {
451 // To mangle anonymous namespaces, hash the path to the main source file. The
452 // path should be whatever (probably relative) path was passed on the command
453 // line. The goal is for the compiler to produce the same output regardless of
454 // working directory, so use the uncanonicalized relative path.
455 //
456 // It's important to make the mangled names unique because, when CodeView
457 // debug info is in use, the debugger uses mangled type names to distinguish
458 // between otherwise identically named types in anonymous namespaces.
459 //
460 // These symbols are always internal, so there is no need for the hash to
461 // match what MSVC produces. For the same reason, clang is free to change the
462 // hash at any time without breaking compatibility with old versions of clang.
463 // The generated names are intended to look similar to what MSVC generates,
464 // which are something like "?A0x01234567@".
465 SourceManager &SM = Context.getSourceManager();
466 if (const FileEntry *FE = SM.getFileEntryForID(SM.getMainFileID())) {
467 // Truncate the hash so we get 8 characters of hexadecimal.
468 uint32_t TruncatedHash = uint32_t(xxHash64(FE->getName()));
469 AnonymousNamespaceHash = llvm::utohexstr(TruncatedHash);
470 } else {
471 // If we don't have a path to the main file, we'll just use 0.
472 AnonymousNamespaceHash = "0";
473 }
474}
475
476bool MicrosoftMangleContextImpl::shouldMangleCXXName(const NamedDecl *D) {
477 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
478 LanguageLinkage L = FD->getLanguageLinkage();
479 // Overloadable functions need mangling.
480 if (FD->hasAttr<OverloadableAttr>())
481 return true;
482
483 // The ABI expects that we would never mangle "typical" user-defined entry
484 // points regardless of visibility or freestanding-ness.
485 //
486 // N.B. This is distinct from asking about "main". "main" has a lot of
487 // special rules associated with it in the standard while these
488 // user-defined entry points are outside of the purview of the standard.
489 // For example, there can be only one definition for "main" in a standards
490 // compliant program; however nothing forbids the existence of wmain and
491 // WinMain in the same translation unit.
492 if (FD->isMSVCRTEntryPoint())
493 return false;
494
495 // C++ functions and those whose names are not a simple identifier need
496 // mangling.
497 if (!FD->getDeclName().isIdentifier() || L == CXXLanguageLinkage)
498 return true;
499
500 // C functions are not mangled.
501 if (L == CLanguageLinkage)
502 return false;
503 }
504
505 // Otherwise, no mangling is done outside C++ mode.
506 if (!getASTContext().getLangOpts().CPlusPlus)
507 return false;
508
509 const VarDecl *VD = dyn_cast<VarDecl>(D);
510 if (VD && !isa<DecompositionDecl>(D)) {
511 // C variables are not mangled.
512 if (VD->isExternC())
513 return false;
514
515 // Variables at global scope with internal linkage are not mangled.
516 const DeclContext *DC = getEffectiveDeclContext(D);
517 // Check for extern variable declared locally.
518 if (DC->isFunctionOrMethod() && D->hasLinkage())
519 while (!DC->isNamespace() && !DC->isTranslationUnit())
520 DC = getEffectiveParentContext(DC);
521
522 if (DC->isTranslationUnit() && D->getFormalLinkage() == InternalLinkage &&
523 !isa<VarTemplateSpecializationDecl>(D) &&
524 D->getIdentifier() != nullptr)
525 return false;
526 }
527
528 return true;
529}
530
531bool
532MicrosoftMangleContextImpl::shouldMangleStringLiteral(const StringLiteral *SL) {
533 return true;
534}
535
536void MicrosoftCXXNameMangler::mangle(const NamedDecl *D, StringRef Prefix) {
537 // MSVC doesn't mangle C++ names the same way it mangles extern "C" names.
538 // Therefore it's really important that we don't decorate the
539 // name with leading underscores or leading/trailing at signs. So, by
540 // default, we emit an asm marker at the start so we get the name right.
541 // Callers can override this with a custom prefix.
542
543 // <mangled-name> ::= ? <name> <type-encoding>
544 Out << Prefix;
545 mangleName(D);
546 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
547 mangleFunctionEncoding(FD, Context.shouldMangleDeclName(FD));
548 else if (const VarDecl *VD = dyn_cast<VarDecl>(D))
549 mangleVariableEncoding(VD);
550 else if (isa<MSGuidDecl>(D))
551 // MSVC appears to mangle GUIDs as if they were variables of type
552 // 'const struct __s_GUID'.
553 Out << "3U__s_GUID@@B";
554 else if (isa<TemplateParamObjectDecl>(D)) {
555 // Template parameter objects don't get a <type-encoding>; their type is
556 // specified as part of their value.
557 } else
558 llvm_unreachable("Tried to mangle unexpected NamedDecl!")::llvm::llvm_unreachable_internal("Tried to mangle unexpected NamedDecl!"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 558)
;
559}
560
561void MicrosoftCXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD,
562 bool ShouldMangle) {
563 // <type-encoding> ::= <function-class> <function-type>
564
565 // Since MSVC operates on the type as written and not the canonical type, it
566 // actually matters which decl we have here. MSVC appears to choose the
567 // first, since it is most likely to be the declaration in a header file.
568 FD = FD->getFirstDecl();
569
570 // We should never ever see a FunctionNoProtoType at this point.
571 // We don't even know how to mangle their types anyway :).
572 const FunctionProtoType *FT = FD->getType()->castAs<FunctionProtoType>();
573
574 // extern "C" functions can hold entities that must be mangled.
575 // As it stands, these functions still need to get expressed in the full
576 // external name. They have their class and type omitted, replaced with '9'.
577 if (ShouldMangle) {
578 // We would like to mangle all extern "C" functions using this additional
579 // component but this would break compatibility with MSVC's behavior.
580 // Instead, do this when we know that compatibility isn't important (in
581 // other words, when it is an overloaded extern "C" function).
582 if (FD->isExternC() && FD->hasAttr<OverloadableAttr>())
583 Out << "$$J0";
584
585 mangleFunctionClass(FD);
586
587 mangleFunctionType(FT, FD, false, false);
588 } else {
589 Out << '9';
590 }
591}
592
593void MicrosoftCXXNameMangler::mangleVariableEncoding(const VarDecl *VD) {
594 // <type-encoding> ::= <storage-class> <variable-type>
595 // <storage-class> ::= 0 # private static member
596 // ::= 1 # protected static member
597 // ::= 2 # public static member
598 // ::= 3 # global
599 // ::= 4 # static local
600
601 // The first character in the encoding (after the name) is the storage class.
602 if (VD->isStaticDataMember()) {
603 // If it's a static member, it also encodes the access level.
604 switch (VD->getAccess()) {
605 default:
606 case AS_private: Out << '0'; break;
607 case AS_protected: Out << '1'; break;
608 case AS_public: Out << '2'; break;
609 }
610 }
611 else if (!VD->isStaticLocal())
612 Out << '3';
613 else
614 Out << '4';
615 // Now mangle the type.
616 // <variable-type> ::= <type> <cvr-qualifiers>
617 // ::= <type> <pointee-cvr-qualifiers> # pointers, references
618 // Pointers and references are odd. The type of 'int * const foo;' gets
619 // mangled as 'QAHA' instead of 'PAHB', for example.
620 SourceRange SR = VD->getSourceRange();
621 QualType Ty = VD->getType();
622 if (Ty->isPointerType() || Ty->isReferenceType() ||
623 Ty->isMemberPointerType()) {
624 mangleType(Ty, SR, QMM_Drop);
625 manglePointerExtQualifiers(
626 Ty.getDesugaredType(getASTContext()).getLocalQualifiers(), QualType());
627 if (const MemberPointerType *MPT = Ty->getAs<MemberPointerType>()) {
628 mangleQualifiers(MPT->getPointeeType().getQualifiers(), true);
629 // Member pointers are suffixed with a back reference to the member
630 // pointer's class name.
631 mangleName(MPT->getClass()->getAsCXXRecordDecl());
632 } else
633 mangleQualifiers(Ty->getPointeeType().getQualifiers(), false);
634 } else if (const ArrayType *AT = getASTContext().getAsArrayType(Ty)) {
635 // Global arrays are funny, too.
636 mangleDecayedArrayType(AT);
637 if (AT->getElementType()->isArrayType())
638 Out << 'A';
639 else
640 mangleQualifiers(Ty.getQualifiers(), false);
641 } else {
642 mangleType(Ty, SR, QMM_Drop);
643 mangleQualifiers(Ty.getQualifiers(), false);
644 }
645}
646
647void MicrosoftCXXNameMangler::mangleMemberDataPointer(const CXXRecordDecl *RD,
648 const ValueDecl *VD,
649 StringRef Prefix) {
650 // <member-data-pointer> ::= <integer-literal>
651 // ::= $F <number> <number>
652 // ::= $G <number> <number> <number>
653
654 int64_t FieldOffset;
655 int64_t VBTableOffset;
656 MSInheritanceModel IM = RD->getMSInheritanceModel();
657 if (VD) {
658 FieldOffset = getASTContext().getFieldOffset(VD);
659 assert(FieldOffset % getASTContext().getCharWidth() == 0 &&(static_cast <bool> (FieldOffset % getASTContext().getCharWidth
() == 0 && "cannot take address of bitfield") ? void (
0) : __assert_fail ("FieldOffset % getASTContext().getCharWidth() == 0 && \"cannot take address of bitfield\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 660, __extension__ __PRETTY_FUNCTION__))
660 "cannot take address of bitfield")(static_cast <bool> (FieldOffset % getASTContext().getCharWidth
() == 0 && "cannot take address of bitfield") ? void (
0) : __assert_fail ("FieldOffset % getASTContext().getCharWidth() == 0 && \"cannot take address of bitfield\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 660, __extension__ __PRETTY_FUNCTION__))
;
661 FieldOffset /= getASTContext().getCharWidth();
662
663 VBTableOffset = 0;
664
665 if (IM == MSInheritanceModel::Virtual)
666 FieldOffset -= getASTContext().getOffsetOfBaseWithVBPtr(RD).getQuantity();
667 } else {
668 FieldOffset = RD->nullFieldOffsetIsZero() ? 0 : -1;
669
670 VBTableOffset = -1;
671 }
672
673 char Code = '\0';
674 switch (IM) {
675 case MSInheritanceModel::Single: Code = '0'; break;
676 case MSInheritanceModel::Multiple: Code = '0'; break;
677 case MSInheritanceModel::Virtual: Code = 'F'; break;
678 case MSInheritanceModel::Unspecified: Code = 'G'; break;
679 }
680
681 Out << Prefix << Code;
682
683 mangleNumber(FieldOffset);
684
685 // The C++ standard doesn't allow base-to-derived member pointer conversions
686 // in template parameter contexts, so the vbptr offset of data member pointers
687 // is always zero.
688 if (inheritanceModelHasVBPtrOffsetField(IM))
689 mangleNumber(0);
690 if (inheritanceModelHasVBTableOffsetField(IM))
691 mangleNumber(VBTableOffset);
692}
693
694void
695MicrosoftCXXNameMangler::mangleMemberFunctionPointer(const CXXRecordDecl *RD,
696 const CXXMethodDecl *MD,
697 StringRef Prefix) {
698 // <member-function-pointer> ::= $1? <name>
699 // ::= $H? <name> <number>
700 // ::= $I? <name> <number> <number>
701 // ::= $J? <name> <number> <number> <number>
702
703 MSInheritanceModel IM = RD->getMSInheritanceModel();
704
705 char Code = '\0';
706 switch (IM) {
707 case MSInheritanceModel::Single: Code = '1'; break;
708 case MSInheritanceModel::Multiple: Code = 'H'; break;
709 case MSInheritanceModel::Virtual: Code = 'I'; break;
710 case MSInheritanceModel::Unspecified: Code = 'J'; break;
711 }
712
713 // If non-virtual, mangle the name. If virtual, mangle as a virtual memptr
714 // thunk.
715 uint64_t NVOffset = 0;
716 uint64_t VBTableOffset = 0;
717 uint64_t VBPtrOffset = 0;
718 if (MD) {
719 Out << Prefix << Code << '?';
720 if (MD->isVirtual()) {
721 MicrosoftVTableContext *VTContext =
722 cast<MicrosoftVTableContext>(getASTContext().getVTableContext());
723 MethodVFTableLocation ML =
724 VTContext->getMethodVFTableLocation(GlobalDecl(MD));
725 mangleVirtualMemPtrThunk(MD, ML);
726 NVOffset = ML.VFPtrOffset.getQuantity();
727 VBTableOffset = ML.VBTableIndex * 4;
728 if (ML.VBase) {
729 const ASTRecordLayout &Layout = getASTContext().getASTRecordLayout(RD);
730 VBPtrOffset = Layout.getVBPtrOffset().getQuantity();
731 }
732 } else {
733 mangleName(MD);
734 mangleFunctionEncoding(MD, /*ShouldMangle=*/true);
735 }
736
737 if (VBTableOffset == 0 && IM == MSInheritanceModel::Virtual)
738 NVOffset -= getASTContext().getOffsetOfBaseWithVBPtr(RD).getQuantity();
739 } else {
740 // Null single inheritance member functions are encoded as a simple nullptr.
741 if (IM == MSInheritanceModel::Single) {
742 Out << Prefix << "0A@";
743 return;
744 }
745 if (IM == MSInheritanceModel::Unspecified)
746 VBTableOffset = -1;
747 Out << Prefix << Code;
748 }
749
750 if (inheritanceModelHasNVOffsetField(/*IsMemberFunction=*/true, IM))
751 mangleNumber(static_cast<uint32_t>(NVOffset));
752 if (inheritanceModelHasVBPtrOffsetField(IM))
753 mangleNumber(VBPtrOffset);
754 if (inheritanceModelHasVBTableOffsetField(IM))
755 mangleNumber(VBTableOffset);
756}
757
758void MicrosoftCXXNameMangler::mangleVirtualMemPtrThunk(
759 const CXXMethodDecl *MD, const MethodVFTableLocation &ML) {
760 // Get the vftable offset.
761 CharUnits PointerWidth = getASTContext().toCharUnitsFromBits(
762 getASTContext().getTargetInfo().getPointerWidth(0));
763 uint64_t OffsetInVFTable = ML.Index * PointerWidth.getQuantity();
764
765 Out << "?_9";
766 mangleName(MD->getParent());
767 Out << "$B";
768 mangleNumber(OffsetInVFTable);
769 Out << 'A';
770 mangleCallingConvention(MD->getType()->castAs<FunctionProtoType>());
771}
772
773void MicrosoftCXXNameMangler::mangleName(const NamedDecl *ND) {
774 // <name> ::= <unscoped-name> {[<named-scope>]+ | [<nested-name>]}? @
775
776 // Always start with the unqualified name.
777 mangleUnqualifiedName(ND);
778
779 mangleNestedName(ND);
780
781 // Terminate the whole name with an '@'.
782 Out << '@';
783}
784
785void MicrosoftCXXNameMangler::mangleNumber(int64_t Number) {
786 mangleNumber(llvm::APSInt(llvm::APInt(64, Number), /*IsUnsigned*/false));
787}
788
789void MicrosoftCXXNameMangler::mangleNumber(llvm::APSInt Number) {
790 // MSVC never mangles any integer wider than 64 bits. In general it appears
791 // to convert every integer to signed 64 bit before mangling (including
792 // unsigned 64 bit values). Do the same, but preserve bits beyond the bottom
793 // 64.
794 llvm::APInt Value =
795 Number.isSigned() ? Number.sextOrSelf(64) : Number.zextOrSelf(64);
796
797 // <non-negative integer> ::= A@ # when Number == 0
798 // ::= <decimal digit> # when 1 <= Number <= 10
799 // ::= <hex digit>+ @ # when Number >= 10
800 //
801 // <number> ::= [?] <non-negative integer>
802
803 if (Value.isNegative()) {
804 Value = -Value;
805 Out << '?';
806 }
807 mangleBits(Value);
808}
809
810void MicrosoftCXXNameMangler::mangleFloat(llvm::APFloat Number) {
811 using llvm::APFloat;
812
813 switch (APFloat::SemanticsToEnum(Number.getSemantics())) {
814 case APFloat::S_IEEEsingle: Out << 'A'; break;
815 case APFloat::S_IEEEdouble: Out << 'B'; break;
816
817 // The following are all Clang extensions. We try to pick manglings that are
818 // unlikely to conflict with MSVC's scheme.
819 case APFloat::S_IEEEhalf: Out << 'V'; break;
820 case APFloat::S_BFloat: Out << 'W'; break;
821 case APFloat::S_x87DoubleExtended: Out << 'X'; break;
822 case APFloat::S_IEEEquad: Out << 'Y'; break;
823 case APFloat::S_PPCDoubleDouble: Out << 'Z'; break;
824 }
825
826 mangleBits(Number.bitcastToAPInt());
827}
828
829void MicrosoftCXXNameMangler::mangleBits(llvm::APInt Value) {
830 if (Value == 0)
831 Out << "A@";
832 else if (Value.uge(1) && Value.ule(10))
833 Out << (Value - 1);
834 else {
835 // Numbers that are not encoded as decimal digits are represented as nibbles
836 // in the range of ASCII characters 'A' to 'P'.
837 // The number 0x123450 would be encoded as 'BCDEFA'
838 llvm::SmallString<32> EncodedNumberBuffer;
839 for (; Value != 0; Value.lshrInPlace(4))
840 EncodedNumberBuffer.push_back('A' + (Value & 0xf).getZExtValue());
841 std::reverse(EncodedNumberBuffer.begin(), EncodedNumberBuffer.end());
842 Out.write(EncodedNumberBuffer.data(), EncodedNumberBuffer.size());
843 Out << '@';
844 }
845}
846
847static const TemplateDecl *
848isTemplate(const NamedDecl *ND, const TemplateArgumentList *&TemplateArgs) {
849 // Check if we have a function template.
850 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
851 if (const TemplateDecl *TD = FD->getPrimaryTemplate()) {
852 TemplateArgs = FD->getTemplateSpecializationArgs();
853 return TD;
854 }
855 }
856
857 // Check if we have a class template.
858 if (const ClassTemplateSpecializationDecl *Spec =
859 dyn_cast<ClassTemplateSpecializationDecl>(ND)) {
860 TemplateArgs = &Spec->getTemplateArgs();
861 return Spec->getSpecializedTemplate();
862 }
863
864 // Check if we have a variable template.
865 if (const VarTemplateSpecializationDecl *Spec =
866 dyn_cast<VarTemplateSpecializationDecl>(ND)) {
867 TemplateArgs = &Spec->getTemplateArgs();
868 return Spec->getSpecializedTemplate();
869 }
870
871 return nullptr;
872}
873
874void MicrosoftCXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND,
875 DeclarationName Name) {
876 // <unqualified-name> ::= <operator-name>
877 // ::= <ctor-dtor-name>
878 // ::= <source-name>
879 // ::= <template-name>
880
881 // Check if we have a template.
882 const TemplateArgumentList *TemplateArgs = nullptr;
883 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) {
884 // Function templates aren't considered for name back referencing. This
885 // makes sense since function templates aren't likely to occur multiple
886 // times in a symbol.
887 if (isa<FunctionTemplateDecl>(TD)) {
888 mangleTemplateInstantiationName(TD, *TemplateArgs);
889 Out << '@';
890 return;
891 }
892
893 // Here comes the tricky thing: if we need to mangle something like
894 // void foo(A::X<Y>, B::X<Y>),
895 // the X<Y> part is aliased. However, if you need to mangle
896 // void foo(A::X<A::Y>, A::X<B::Y>),
897 // the A::X<> part is not aliased.
898 // That is, from the mangler's perspective we have a structure like this:
899 // namespace[s] -> type[ -> template-parameters]
900 // but from the Clang perspective we have
901 // type [ -> template-parameters]
902 // \-> namespace[s]
903 // What we do is we create a new mangler, mangle the same type (without
904 // a namespace suffix) to a string using the extra mangler and then use
905 // the mangled type name as a key to check the mangling of different types
906 // for aliasing.
907
908 // It's important to key cache reads off ND, not TD -- the same TD can
909 // be used with different TemplateArgs, but ND uniquely identifies
910 // TD / TemplateArg pairs.
911 ArgBackRefMap::iterator Found = TemplateArgBackReferences.find(ND);
912 if (Found == TemplateArgBackReferences.end()) {
913
914 TemplateArgStringMap::iterator Found = TemplateArgStrings.find(ND);
915 if (Found == TemplateArgStrings.end()) {
916 // Mangle full template name into temporary buffer.
917 llvm::SmallString<64> TemplateMangling;
918 llvm::raw_svector_ostream Stream(TemplateMangling);
919 MicrosoftCXXNameMangler Extra(Context, Stream);
920 Extra.mangleTemplateInstantiationName(TD, *TemplateArgs);
921
922 // Use the string backref vector to possibly get a back reference.
923 mangleSourceName(TemplateMangling);
924
925 // Memoize back reference for this type if one exist, else memoize
926 // the mangling itself.
927 BackRefVec::iterator StringFound =
928 llvm::find(NameBackReferences, TemplateMangling);
929 if (StringFound != NameBackReferences.end()) {
930 TemplateArgBackReferences[ND] =
931 StringFound - NameBackReferences.begin();
932 } else {
933 TemplateArgStrings[ND] =
934 TemplateArgStringStorage.save(TemplateMangling.str());
935 }
936 } else {
937 Out << Found->second << '@'; // Outputs a StringRef.
938 }
939 } else {
940 Out << Found->second; // Outputs a back reference (an int).
941 }
942 return;
943 }
944
945 switch (Name.getNameKind()) {
946 case DeclarationName::Identifier: {
947 if (const IdentifierInfo *II = Name.getAsIdentifierInfo()) {
948 mangleSourceName(II->getName());
949 break;
950 }
951
952 // Otherwise, an anonymous entity. We must have a declaration.
953 assert(ND && "mangling empty name without declaration")(static_cast <bool> (ND && "mangling empty name without declaration"
) ? void (0) : __assert_fail ("ND && \"mangling empty name without declaration\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 953, __extension__ __PRETTY_FUNCTION__))
;
954
955 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) {
956 if (NS->isAnonymousNamespace()) {
957 Out << "?A0x" << Context.getAnonymousNamespaceHash() << '@';
958 break;
959 }
960 }
961
962 if (const DecompositionDecl *DD = dyn_cast<DecompositionDecl>(ND)) {
963 // Decomposition declarations are considered anonymous, and get
964 // numbered with a $S prefix.
965 llvm::SmallString<64> Name("$S");
966 // Get a unique id for the anonymous struct.
967 Name += llvm::utostr(Context.getAnonymousStructId(DD) + 1);
968 mangleSourceName(Name);
969 break;
970 }
971
972 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) {
973 // We must have an anonymous union or struct declaration.
974 const CXXRecordDecl *RD = VD->getType()->getAsCXXRecordDecl();
975 assert(RD && "expected variable decl to have a record type")(static_cast <bool> (RD && "expected variable decl to have a record type"
) ? void (0) : __assert_fail ("RD && \"expected variable decl to have a record type\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 975, __extension__ __PRETTY_FUNCTION__))
;
976 // Anonymous types with no tag or typedef get the name of their
977 // declarator mangled in. If they have no declarator, number them with
978 // a $S prefix.
979 llvm::SmallString<64> Name("$S");
980 // Get a unique id for the anonymous struct.
981 Name += llvm::utostr(Context.getAnonymousStructId(RD) + 1);
982 mangleSourceName(Name.str());
983 break;
984 }
985
986 if (const MSGuidDecl *GD = dyn_cast<MSGuidDecl>(ND)) {
987 // Mangle a GUID object as if it were a variable with the corresponding
988 // mangled name.
989 SmallString<sizeof("_GUID_12345678_1234_1234_1234_1234567890ab")> GUID;
990 llvm::raw_svector_ostream GUIDOS(GUID);
991 Context.mangleMSGuidDecl(GD, GUIDOS);
992 mangleSourceName(GUID);
993 break;
994 }
995
996 if (const auto *TPO = dyn_cast<TemplateParamObjectDecl>(ND)) {
997 Out << "?__N";
998 mangleTemplateArgValue(TPO->getType().getUnqualifiedType(),
999 TPO->getValue());
1000 break;
1001 }
1002
1003 // We must have an anonymous struct.
1004 const TagDecl *TD = cast<TagDecl>(ND);
1005 if (const TypedefNameDecl *D = TD->getTypedefNameForAnonDecl()) {
1006 assert(TD->getDeclContext() == D->getDeclContext() &&(static_cast <bool> (TD->getDeclContext() == D->getDeclContext
() && "Typedef should not be in another decl context!"
) ? void (0) : __assert_fail ("TD->getDeclContext() == D->getDeclContext() && \"Typedef should not be in another decl context!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1007, __extension__ __PRETTY_FUNCTION__))
1007 "Typedef should not be in another decl context!")(static_cast <bool> (TD->getDeclContext() == D->getDeclContext
() && "Typedef should not be in another decl context!"
) ? void (0) : __assert_fail ("TD->getDeclContext() == D->getDeclContext() && \"Typedef should not be in another decl context!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1007, __extension__ __PRETTY_FUNCTION__))
;
1008 assert(D->getDeclName().getAsIdentifierInfo() &&(static_cast <bool> (D->getDeclName().getAsIdentifierInfo
() && "Typedef was not named!") ? void (0) : __assert_fail
("D->getDeclName().getAsIdentifierInfo() && \"Typedef was not named!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1009, __extension__ __PRETTY_FUNCTION__))
1009 "Typedef was not named!")(static_cast <bool> (D->getDeclName().getAsIdentifierInfo
() && "Typedef was not named!") ? void (0) : __assert_fail
("D->getDeclName().getAsIdentifierInfo() && \"Typedef was not named!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1009, __extension__ __PRETTY_FUNCTION__))
;
1010 mangleSourceName(D->getDeclName().getAsIdentifierInfo()->getName());
1011 break;
1012 }
1013
1014 if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(TD)) {
1015 if (Record->isLambda()) {
1016 llvm::SmallString<10> Name("<lambda_");
1017
1018 Decl *LambdaContextDecl = Record->getLambdaContextDecl();
1019 unsigned LambdaManglingNumber = Record->getLambdaManglingNumber();
1020 unsigned LambdaId;
1021 const ParmVarDecl *Parm =
1022 dyn_cast_or_null<ParmVarDecl>(LambdaContextDecl);
1023 const FunctionDecl *Func =
1024 Parm ? dyn_cast<FunctionDecl>(Parm->getDeclContext()) : nullptr;
1025
1026 if (Func) {
1027 unsigned DefaultArgNo =
1028 Func->getNumParams() - Parm->getFunctionScopeIndex();
1029 Name += llvm::utostr(DefaultArgNo);
1030 Name += "_";
1031 }
1032
1033 if (LambdaManglingNumber)
1034 LambdaId = LambdaManglingNumber;
1035 else
1036 LambdaId = Context.getLambdaId(Record);
1037
1038 Name += llvm::utostr(LambdaId);
1039 Name += ">";
1040
1041 mangleSourceName(Name);
1042
1043 // If the context is a variable or a class member and not a parameter,
1044 // it is encoded in a qualified name.
1045 if (LambdaManglingNumber && LambdaContextDecl) {
1046 if ((isa<VarDecl>(LambdaContextDecl) ||
1047 isa<FieldDecl>(LambdaContextDecl)) &&
1048 !isa<ParmVarDecl>(LambdaContextDecl)) {
1049 mangleUnqualifiedName(cast<NamedDecl>(LambdaContextDecl));
1050 }
1051 }
1052 break;
1053 }
1054 }
1055
1056 llvm::SmallString<64> Name;
1057 if (DeclaratorDecl *DD =
1058 Context.getASTContext().getDeclaratorForUnnamedTagDecl(TD)) {
1059 // Anonymous types without a name for linkage purposes have their
1060 // declarator mangled in if they have one.
1061 Name += "<unnamed-type-";
1062 Name += DD->getName();
1063 } else if (TypedefNameDecl *TND =
1064 Context.getASTContext().getTypedefNameForUnnamedTagDecl(
1065 TD)) {
1066 // Anonymous types without a name for linkage purposes have their
1067 // associate typedef mangled in if they have one.
1068 Name += "<unnamed-type-";
1069 Name += TND->getName();
1070 } else if (isa<EnumDecl>(TD) &&
1071 cast<EnumDecl>(TD)->enumerator_begin() !=
1072 cast<EnumDecl>(TD)->enumerator_end()) {
1073 // Anonymous non-empty enums mangle in the first enumerator.
1074 auto *ED = cast<EnumDecl>(TD);
1075 Name += "<unnamed-enum-";
1076 Name += ED->enumerator_begin()->getName();
1077 } else {
1078 // Otherwise, number the types using a $S prefix.
1079 Name += "<unnamed-type-$S";
1080 Name += llvm::utostr(Context.getAnonymousStructId(TD) + 1);
1081 }
1082 Name += ">";
1083 mangleSourceName(Name.str());
1084 break;
1085 }
1086
1087 case DeclarationName::ObjCZeroArgSelector:
1088 case DeclarationName::ObjCOneArgSelector:
1089 case DeclarationName::ObjCMultiArgSelector: {
1090 // This is reachable only when constructing an outlined SEH finally
1091 // block. Nothing depends on this mangling and it's used only with
1092 // functinos with internal linkage.
1093 llvm::SmallString<64> Name;
1094 mangleSourceName(Name.str());
1095 break;
1096 }
1097
1098 case DeclarationName::CXXConstructorName:
1099 if (isStructorDecl(ND)) {
1100 if (StructorType == Ctor_CopyingClosure) {
1101 Out << "?_O";
1102 return;
1103 }
1104 if (StructorType == Ctor_DefaultClosure) {
1105 Out << "?_F";
1106 return;
1107 }
1108 }
1109 Out << "?0";
1110 return;
1111
1112 case DeclarationName::CXXDestructorName:
1113 if (isStructorDecl(ND))
1114 // If the named decl is the C++ destructor we're mangling,
1115 // use the type we were given.
1116 mangleCXXDtorType(static_cast<CXXDtorType>(StructorType));
1117 else
1118 // Otherwise, use the base destructor name. This is relevant if a
1119 // class with a destructor is declared within a destructor.
1120 mangleCXXDtorType(Dtor_Base);
1121 break;
1122
1123 case DeclarationName::CXXConversionFunctionName:
1124 // <operator-name> ::= ?B # (cast)
1125 // The target type is encoded as the return type.
1126 Out << "?B";
1127 break;
1128
1129 case DeclarationName::CXXOperatorName:
1130 mangleOperatorName(Name.getCXXOverloadedOperator(), ND->getLocation());
1131 break;
1132
1133 case DeclarationName::CXXLiteralOperatorName: {
1134 Out << "?__K";
1135 mangleSourceName(Name.getCXXLiteralIdentifier()->getName());
1136 break;
1137 }
1138
1139 case DeclarationName::CXXDeductionGuideName:
1140 llvm_unreachable("Can't mangle a deduction guide name!")::llvm::llvm_unreachable_internal("Can't mangle a deduction guide name!"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1140)
;
1141
1142 case DeclarationName::CXXUsingDirective:
1143 llvm_unreachable("Can't mangle a using directive name!")::llvm::llvm_unreachable_internal("Can't mangle a using directive name!"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1143)
;
1144 }
1145}
1146
1147// <postfix> ::= <unqualified-name> [<postfix>]
1148// ::= <substitution> [<postfix>]
1149void MicrosoftCXXNameMangler::mangleNestedName(const NamedDecl *ND) {
1150 const DeclContext *DC = getEffectiveDeclContext(ND);
1151 while (!DC->isTranslationUnit()) {
1152 if (isa<TagDecl>(ND) || isa<VarDecl>(ND)) {
1153 unsigned Disc;
1154 if (Context.getNextDiscriminator(ND, Disc)) {
1155 Out << '?';
1156 mangleNumber(Disc);
1157 Out << '?';
1158 }
1159 }
1160
1161 if (const BlockDecl *BD = dyn_cast<BlockDecl>(DC)) {
1162 auto Discriminate =
1163 [](StringRef Name, const unsigned Discriminator,
1164 const unsigned ParameterDiscriminator) -> std::string {
1165 std::string Buffer;
1166 llvm::raw_string_ostream Stream(Buffer);
1167 Stream << Name;
1168 if (Discriminator)
1169 Stream << '_' << Discriminator;
1170 if (ParameterDiscriminator)
1171 Stream << '_' << ParameterDiscriminator;
1172 return Stream.str();
1173 };
1174
1175 unsigned Discriminator = BD->getBlockManglingNumber();
1176 if (!Discriminator)
1177 Discriminator = Context.getBlockId(BD, /*Local=*/false);
1178
1179 // Mangle the parameter position as a discriminator to deal with unnamed
1180 // parameters. Rather than mangling the unqualified parameter name,
1181 // always use the position to give a uniform mangling.
1182 unsigned ParameterDiscriminator = 0;
1183 if (const auto *MC = BD->getBlockManglingContextDecl())
1184 if (const auto *P = dyn_cast<ParmVarDecl>(MC))
1185 if (const auto *F = dyn_cast<FunctionDecl>(P->getDeclContext()))
1186 ParameterDiscriminator =
1187 F->getNumParams() - P->getFunctionScopeIndex();
1188
1189 DC = getEffectiveDeclContext(BD);
1190
1191 Out << '?';
1192 mangleSourceName(Discriminate("_block_invoke", Discriminator,
1193 ParameterDiscriminator));
1194 // If we have a block mangling context, encode that now. This allows us
1195 // to discriminate between named static data initializers in the same
1196 // scope. This is handled differently from parameters, which use
1197 // positions to discriminate between multiple instances.
1198 if (const auto *MC = BD->getBlockManglingContextDecl())
1199 if (!isa<ParmVarDecl>(MC))
1200 if (const auto *ND = dyn_cast<NamedDecl>(MC))
1201 mangleUnqualifiedName(ND);
1202 // MS ABI and Itanium manglings are in inverted scopes. In the case of a
1203 // RecordDecl, mangle the entire scope hierarchy at this point rather than
1204 // just the unqualified name to get the ordering correct.
1205 if (const auto *RD = dyn_cast<RecordDecl>(DC))
1206 mangleName(RD);
1207 else
1208 Out << '@';
1209 // void __cdecl
1210 Out << "YAX";
1211 // struct __block_literal *
1212 Out << 'P';
1213 // __ptr64
1214 if (PointersAre64Bit)
1215 Out << 'E';
1216 Out << 'A';
1217 mangleArtificialTagType(TTK_Struct,
1218 Discriminate("__block_literal", Discriminator,
1219 ParameterDiscriminator));
1220 Out << "@Z";
1221
1222 // If the effective context was a Record, we have fully mangled the
1223 // qualified name and do not need to continue.
1224 if (isa<RecordDecl>(DC))
1225 break;
1226 continue;
1227 } else if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(DC)) {
1228 mangleObjCMethodName(Method);
1229 } else if (isa<NamedDecl>(DC)) {
1230 ND = cast<NamedDecl>(DC);
1231 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
1232 mangle(FD, "?");
1233 break;
1234 } else {
1235 mangleUnqualifiedName(ND);
1236 // Lambdas in default arguments conceptually belong to the function the
1237 // parameter corresponds to.
1238 if (const auto *LDADC = getLambdaDefaultArgumentDeclContext(ND)) {
1239 DC = LDADC;
1240 continue;
1241 }
1242 }
1243 }
1244 DC = DC->getParent();
1245 }
1246}
1247
1248void MicrosoftCXXNameMangler::mangleCXXDtorType(CXXDtorType T) {
1249 // Microsoft uses the names on the case labels for these dtor variants. Clang
1250 // uses the Itanium terminology internally. Everything in this ABI delegates
1251 // towards the base dtor.
1252 switch (T) {
1253 // <operator-name> ::= ?1 # destructor
1254 case Dtor_Base: Out << "?1"; return;
1255 // <operator-name> ::= ?_D # vbase destructor
1256 case Dtor_Complete: Out << "?_D"; return;
1257 // <operator-name> ::= ?_G # scalar deleting destructor
1258 case Dtor_Deleting: Out << "?_G"; return;
1259 // <operator-name> ::= ?_E # vector deleting destructor
1260 // FIXME: Add a vector deleting dtor type. It goes in the vtable, so we need
1261 // it.
1262 case Dtor_Comdat:
1263 llvm_unreachable("not expecting a COMDAT")::llvm::llvm_unreachable_internal("not expecting a COMDAT", "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1263)
;
1264 }
1265 llvm_unreachable("Unsupported dtor type?")::llvm::llvm_unreachable_internal("Unsupported dtor type?", "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1265)
;
1266}
1267
1268void MicrosoftCXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO,
1269 SourceLocation Loc) {
1270 switch (OO) {
1271 // ?0 # constructor
1272 // ?1 # destructor
1273 // <operator-name> ::= ?2 # new
1274 case OO_New: Out << "?2"; break;
1275 // <operator-name> ::= ?3 # delete
1276 case OO_Delete: Out << "?3"; break;
1277 // <operator-name> ::= ?4 # =
1278 case OO_Equal: Out << "?4"; break;
1279 // <operator-name> ::= ?5 # >>
1280 case OO_GreaterGreater: Out << "?5"; break;
1281 // <operator-name> ::= ?6 # <<
1282 case OO_LessLess: Out << "?6"; break;
1283 // <operator-name> ::= ?7 # !
1284 case OO_Exclaim: Out << "?7"; break;
1285 // <operator-name> ::= ?8 # ==
1286 case OO_EqualEqual: Out << "?8"; break;
1287 // <operator-name> ::= ?9 # !=
1288 case OO_ExclaimEqual: Out << "?9"; break;
1289 // <operator-name> ::= ?A # []
1290 case OO_Subscript: Out << "?A"; break;
1291 // ?B # conversion
1292 // <operator-name> ::= ?C # ->
1293 case OO_Arrow: Out << "?C"; break;
1294 // <operator-name> ::= ?D # *
1295 case OO_Star: Out << "?D"; break;
1296 // <operator-name> ::= ?E # ++
1297 case OO_PlusPlus: Out << "?E"; break;
1298 // <operator-name> ::= ?F # --
1299 case OO_MinusMinus: Out << "?F"; break;
1300 // <operator-name> ::= ?G # -
1301 case OO_Minus: Out << "?G"; break;
1302 // <operator-name> ::= ?H # +
1303 case OO_Plus: Out << "?H"; break;
1304 // <operator-name> ::= ?I # &
1305 case OO_Amp: Out << "?I"; break;
1306 // <operator-name> ::= ?J # ->*
1307 case OO_ArrowStar: Out << "?J"; break;
1308 // <operator-name> ::= ?K # /
1309 case OO_Slash: Out << "?K"; break;
1310 // <operator-name> ::= ?L # %
1311 case OO_Percent: Out << "?L"; break;
1312 // <operator-name> ::= ?M # <
1313 case OO_Less: Out << "?M"; break;
1314 // <operator-name> ::= ?N # <=
1315 case OO_LessEqual: Out << "?N"; break;
1316 // <operator-name> ::= ?O # >
1317 case OO_Greater: Out << "?O"; break;
1318 // <operator-name> ::= ?P # >=
1319 case OO_GreaterEqual: Out << "?P"; break;
1320 // <operator-name> ::= ?Q # ,
1321 case OO_Comma: Out << "?Q"; break;
1322 // <operator-name> ::= ?R # ()
1323 case OO_Call: Out << "?R"; break;
1324 // <operator-name> ::= ?S # ~
1325 case OO_Tilde: Out << "?S"; break;
1326 // <operator-name> ::= ?T # ^
1327 case OO_Caret: Out << "?T"; break;
1328 // <operator-name> ::= ?U # |
1329 case OO_Pipe: Out << "?U"; break;
1330 // <operator-name> ::= ?V # &&
1331 case OO_AmpAmp: Out << "?V"; break;
1332 // <operator-name> ::= ?W # ||
1333 case OO_PipePipe: Out << "?W"; break;
1334 // <operator-name> ::= ?X # *=
1335 case OO_StarEqual: Out << "?X"; break;
1336 // <operator-name> ::= ?Y # +=
1337 case OO_PlusEqual: Out << "?Y"; break;
1338 // <operator-name> ::= ?Z # -=
1339 case OO_MinusEqual: Out << "?Z"; break;
1340 // <operator-name> ::= ?_0 # /=
1341 case OO_SlashEqual: Out << "?_0"; break;
1342 // <operator-name> ::= ?_1 # %=
1343 case OO_PercentEqual: Out << "?_1"; break;
1344 // <operator-name> ::= ?_2 # >>=
1345 case OO_GreaterGreaterEqual: Out << "?_2"; break;
1346 // <operator-name> ::= ?_3 # <<=
1347 case OO_LessLessEqual: Out << "?_3"; break;
1348 // <operator-name> ::= ?_4 # &=
1349 case OO_AmpEqual: Out << "?_4"; break;
1350 // <operator-name> ::= ?_5 # |=
1351 case OO_PipeEqual: Out << "?_5"; break;
1352 // <operator-name> ::= ?_6 # ^=
1353 case OO_CaretEqual: Out << "?_6"; break;
1354 // ?_7 # vftable
1355 // ?_8 # vbtable
1356 // ?_9 # vcall
1357 // ?_A # typeof
1358 // ?_B # local static guard
1359 // ?_C # string
1360 // ?_D # vbase destructor
1361 // ?_E # vector deleting destructor
1362 // ?_F # default constructor closure
1363 // ?_G # scalar deleting destructor
1364 // ?_H # vector constructor iterator
1365 // ?_I # vector destructor iterator
1366 // ?_J # vector vbase constructor iterator
1367 // ?_K # virtual displacement map
1368 // ?_L # eh vector constructor iterator
1369 // ?_M # eh vector destructor iterator
1370 // ?_N # eh vector vbase constructor iterator
1371 // ?_O # copy constructor closure
1372 // ?_P<name> # udt returning <name>
1373 // ?_Q # <unknown>
1374 // ?_R0 # RTTI Type Descriptor
1375 // ?_R1 # RTTI Base Class Descriptor at (a,b,c,d)
1376 // ?_R2 # RTTI Base Class Array
1377 // ?_R3 # RTTI Class Hierarchy Descriptor
1378 // ?_R4 # RTTI Complete Object Locator
1379 // ?_S # local vftable
1380 // ?_T # local vftable constructor closure
1381 // <operator-name> ::= ?_U # new[]
1382 case OO_Array_New: Out << "?_U"; break;
1383 // <operator-name> ::= ?_V # delete[]
1384 case OO_Array_Delete: Out << "?_V"; break;
1385 // <operator-name> ::= ?__L # co_await
1386 case OO_Coawait: Out << "?__L"; break;
1387 // <operator-name> ::= ?__M # <=>
1388 case OO_Spaceship: Out << "?__M"; break;
1389
1390 case OO_Conditional: {
1391 DiagnosticsEngine &Diags = Context.getDiags();
1392 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
1393 "cannot mangle this conditional operator yet");
1394 Diags.Report(Loc, DiagID);
1395 break;
1396 }
1397
1398 case OO_None:
1399 case NUM_OVERLOADED_OPERATORS:
1400 llvm_unreachable("Not an overloaded operator")::llvm::llvm_unreachable_internal("Not an overloaded operator"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1400)
;
1401 }
1402}
1403
1404void MicrosoftCXXNameMangler::mangleSourceName(StringRef Name) {
1405 // <source name> ::= <identifier> @
1406 BackRefVec::iterator Found = llvm::find(NameBackReferences, Name);
1407 if (Found == NameBackReferences.end()) {
1408 if (NameBackReferences.size() < 10)
1409 NameBackReferences.push_back(std::string(Name));
1410 Out << Name << '@';
1411 } else {
1412 Out << (Found - NameBackReferences.begin());
1413 }
1414}
1415
1416void MicrosoftCXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) {
1417 Context.mangleObjCMethodNameAsSourceName(MD, Out);
1418}
1419
1420void MicrosoftCXXNameMangler::mangleTemplateInstantiationName(
1421 const TemplateDecl *TD, const TemplateArgumentList &TemplateArgs) {
1422 // <template-name> ::= <unscoped-template-name> <template-args>
1423 // ::= <substitution>
1424 // Always start with the unqualified name.
1425
1426 // Templates have their own context for back references.
1427 ArgBackRefMap OuterFunArgsContext;
1428 ArgBackRefMap OuterTemplateArgsContext;
1429 BackRefVec OuterTemplateContext;
1430 PassObjectSizeArgsSet OuterPassObjectSizeArgs;
1431 NameBackReferences.swap(OuterTemplateContext);
1432 FunArgBackReferences.swap(OuterFunArgsContext);
1433 TemplateArgBackReferences.swap(OuterTemplateArgsContext);
1434 PassObjectSizeArgs.swap(OuterPassObjectSizeArgs);
1435
1436 mangleUnscopedTemplateName(TD);
1437 mangleTemplateArgs(TD, TemplateArgs);
1438
1439 // Restore the previous back reference contexts.
1440 NameBackReferences.swap(OuterTemplateContext);
1441 FunArgBackReferences.swap(OuterFunArgsContext);
1442 TemplateArgBackReferences.swap(OuterTemplateArgsContext);
1443 PassObjectSizeArgs.swap(OuterPassObjectSizeArgs);
1444}
1445
1446void
1447MicrosoftCXXNameMangler::mangleUnscopedTemplateName(const TemplateDecl *TD) {
1448 // <unscoped-template-name> ::= ?$ <unqualified-name>
1449 Out << "?$";
1450 mangleUnqualifiedName(TD);
1451}
1452
1453void MicrosoftCXXNameMangler::mangleIntegerLiteral(
1454 const llvm::APSInt &Value, const NonTypeTemplateParmDecl *PD,
1455 QualType TemplateArgType) {
1456 // <integer-literal> ::= $0 <number>
1457 Out << "$";
1458
1459 // Since MSVC 2019, add 'M[<type>]' after '$' for auto template parameter when
1460 // argument is integer.
1461 if (getASTContext().getLangOpts().isCompatibleWithMSVC(
1462 LangOptions::MSVC2019) &&
1463 PD && PD->getType()->getTypeClass() == Type::Auto &&
1464 !TemplateArgType.isNull()) {
1465 Out << "M";
1466 mangleType(TemplateArgType, SourceRange(), QMM_Drop);
1467 }
1468
1469 Out << "0";
1470
1471 mangleNumber(Value);
1472}
1473
1474void MicrosoftCXXNameMangler::mangleExpression(
1475 const Expr *E, const NonTypeTemplateParmDecl *PD) {
1476 // See if this is a constant expression.
1477 if (Optional<llvm::APSInt> Value =
1478 E->getIntegerConstantExpr(Context.getASTContext())) {
1479 mangleIntegerLiteral(*Value, PD, E->getType());
1480 return;
1481 }
1482
1483 // As bad as this diagnostic is, it's better than crashing.
1484 DiagnosticsEngine &Diags = Context.getDiags();
1485 unsigned DiagID = Diags.getCustomDiagID(
1486 DiagnosticsEngine::Error, "cannot yet mangle expression type %0");
1487 Diags.Report(E->getExprLoc(), DiagID) << E->getStmtClassName()
1488 << E->getSourceRange();
1489}
1490
1491void MicrosoftCXXNameMangler::mangleTemplateArgs(
1492 const TemplateDecl *TD, const TemplateArgumentList &TemplateArgs) {
1493 // <template-args> ::= <template-arg>+
1494 const TemplateParameterList *TPL = TD->getTemplateParameters();
1495 assert(TPL->size() == TemplateArgs.size() &&(static_cast <bool> (TPL->size() == TemplateArgs.size
() && "size mismatch between args and parms!") ? void
(0) : __assert_fail ("TPL->size() == TemplateArgs.size() && \"size mismatch between args and parms!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1496, __extension__ __PRETTY_FUNCTION__))
1496 "size mismatch between args and parms!")(static_cast <bool> (TPL->size() == TemplateArgs.size
() && "size mismatch between args and parms!") ? void
(0) : __assert_fail ("TPL->size() == TemplateArgs.size() && \"size mismatch between args and parms!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1496, __extension__ __PRETTY_FUNCTION__))
;
1497
1498 for (size_t i = 0; i < TemplateArgs.size(); ++i) {
1499 const TemplateArgument &TA = TemplateArgs[i];
1500
1501 // Separate consecutive packs by $$Z.
1502 if (i > 0 && TA.getKind() == TemplateArgument::Pack &&
1503 TemplateArgs[i - 1].getKind() == TemplateArgument::Pack)
1504 Out << "$$Z";
1505
1506 mangleTemplateArg(TD, TA, TPL->getParam(i));
1507 }
1508}
1509
1510void MicrosoftCXXNameMangler::mangleTemplateArg(const TemplateDecl *TD,
1511 const TemplateArgument &TA,
1512 const NamedDecl *Parm) {
1513 // <template-arg> ::= <type>
1514 // ::= <integer-literal>
1515 // ::= <member-data-pointer>
1516 // ::= <member-function-pointer>
1517 // ::= $ <constant-value>
1518 // ::= <template-args>
1519 //
1520 // <constant-value> ::= 0 <number> # integer
1521 // ::= 1 <mangled-name> # address of D
1522 // ::= 2 <type> <typed-constant-value>* @ # struct
1523 // ::= 3 <type> <constant-value>* @ # array
1524 // ::= 4 ??? # string
1525 // ::= 5 <constant-value> @ # address of subobject
1526 // ::= 6 <constant-value> <unqualified-name> @ # a.b
1527 // ::= 7 <type> [<unqualified-name> <constant-value>] @
1528 // # union, with or without an active member
1529 // # pointer to member, symbolically
1530 // ::= 8 <class> <unqualified-name> @
1531 // ::= A <type> <non-negative integer> # float
1532 // ::= B <type> <non-negative integer> # double
1533 // ::= E <mangled-name> # reference to D
1534 // # pointer to member, by component value
1535 // ::= F <number> <number>
1536 // ::= G <number> <number> <number>
1537 // ::= H <mangled-name> <number>
1538 // ::= I <mangled-name> <number> <number>
1539 // ::= J <mangled-name> <number> <number> <number>
1540 //
1541 // <typed-constant-value> ::= [<type>] <constant-value>
1542 //
1543 // The <type> appears to be included in a <typed-constant-value> only in the
1544 // '0', '1', '8', 'A', 'B', and 'E' cases.
1545
1546 switch (TA.getKind()) {
1547 case TemplateArgument::Null:
1548 llvm_unreachable("Can't mangle null template arguments!")::llvm::llvm_unreachable_internal("Can't mangle null template arguments!"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1548)
;
1549 case TemplateArgument::TemplateExpansion:
1550 llvm_unreachable("Can't mangle template expansion arguments!")::llvm::llvm_unreachable_internal("Can't mangle template expansion arguments!"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1550)
;
1551 case TemplateArgument::Type: {
1552 QualType T = TA.getAsType();
1553 mangleType(T, SourceRange(), QMM_Escape);
1554 break;
1555 }
1556 case TemplateArgument::Declaration: {
1557 const NamedDecl *ND = TA.getAsDecl();
1558 if (isa<FieldDecl>(ND) || isa<IndirectFieldDecl>(ND)) {
1559 mangleMemberDataPointer(cast<CXXRecordDecl>(ND->getDeclContext())
1560 ->getMostRecentNonInjectedDecl(),
1561 cast<ValueDecl>(ND));
1562 } else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
1563 const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD);
1564 if (MD && MD->isInstance()) {
1565 mangleMemberFunctionPointer(
1566 MD->getParent()->getMostRecentNonInjectedDecl(), MD);
1567 } else {
1568 Out << "$1?";
1569 mangleName(FD);
1570 mangleFunctionEncoding(FD, /*ShouldMangle=*/true);
1571 }
1572 } else if (TA.getParamTypeForDecl()->isRecordType()) {
1573 Out << "$";
1574 auto *TPO = cast<TemplateParamObjectDecl>(ND);
1575 mangleTemplateArgValue(TPO->getType().getUnqualifiedType(),
1576 TPO->getValue());
1577 } else {
1578 mangle(ND, TA.getParamTypeForDecl()->isReferenceType() ? "$E?" : "$1?");
1579 }
1580 break;
1581 }
1582 case TemplateArgument::Integral: {
1583 QualType T = TA.getIntegralType();
1584 mangleIntegerLiteral(TA.getAsIntegral(),
1585 cast<NonTypeTemplateParmDecl>(Parm), T);
1586 break;
1587 }
1588 case TemplateArgument::NullPtr: {
1589 QualType T = TA.getNullPtrType();
1590 if (const MemberPointerType *MPT = T->getAs<MemberPointerType>()) {
1591 const CXXRecordDecl *RD = MPT->getMostRecentCXXRecordDecl();
1592 if (MPT->isMemberFunctionPointerType() &&
1593 !isa<FunctionTemplateDecl>(TD)) {
1594 mangleMemberFunctionPointer(RD, nullptr);
1595 return;
1596 }
1597 if (MPT->isMemberDataPointer()) {
1598 if (!isa<FunctionTemplateDecl>(TD)) {
1599 mangleMemberDataPointer(RD, nullptr);
1600 return;
1601 }
1602 // nullptr data pointers are always represented with a single field
1603 // which is initialized with either 0 or -1. Why -1? Well, we need to
1604 // distinguish the case where the data member is at offset zero in the
1605 // record.
1606 // However, we are free to use 0 *if* we would use multiple fields for
1607 // non-nullptr member pointers.
1608 if (!RD->nullFieldOffsetIsZero()) {
1609 mangleIntegerLiteral(llvm::APSInt::get(-1),
1610 cast<NonTypeTemplateParmDecl>(Parm), T);
1611 return;
1612 }
1613 }
1614 }
1615 mangleIntegerLiteral(llvm::APSInt::getUnsigned(0),
1616 cast<NonTypeTemplateParmDecl>(Parm), T);
1617 break;
1618 }
1619 case TemplateArgument::Expression:
1620 mangleExpression(TA.getAsExpr(), cast<NonTypeTemplateParmDecl>(Parm));
1621 break;
1622 case TemplateArgument::Pack: {
1623 ArrayRef<TemplateArgument> TemplateArgs = TA.getPackAsArray();
1624 if (TemplateArgs.empty()) {
1625 if (isa<TemplateTypeParmDecl>(Parm) ||
1626 isa<TemplateTemplateParmDecl>(Parm))
1627 // MSVC 2015 changed the mangling for empty expanded template packs,
1628 // use the old mangling for link compatibility for old versions.
1629 Out << (Context.getASTContext().getLangOpts().isCompatibleWithMSVC(
1630 LangOptions::MSVC2015)
1631 ? "$$V"
1632 : "$$$V");
1633 else if (isa<NonTypeTemplateParmDecl>(Parm))
1634 Out << "$S";
1635 else
1636 llvm_unreachable("unexpected template parameter decl!")::llvm::llvm_unreachable_internal("unexpected template parameter decl!"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1636)
;
1637 } else {
1638 for (const TemplateArgument &PA : TemplateArgs)
1639 mangleTemplateArg(TD, PA, Parm);
1640 }
1641 break;
1642 }
1643 case TemplateArgument::Template: {
1644 const NamedDecl *ND =
1645 TA.getAsTemplate().getAsTemplateDecl()->getTemplatedDecl();
1646 if (const auto *TD = dyn_cast<TagDecl>(ND)) {
1647 mangleType(TD);
1648 } else if (isa<TypeAliasDecl>(ND)) {
1649 Out << "$$Y";
1650 mangleName(ND);
1651 } else {
1652 llvm_unreachable("unexpected template template NamedDecl!")::llvm::llvm_unreachable_internal("unexpected template template NamedDecl!"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1652)
;
1653 }
1654 break;
1655 }
1656 }
1657}
1658
1659void MicrosoftCXXNameMangler::mangleTemplateArgValue(QualType T,
1660 const APValue &V,
1661 bool WithScalarType) {
1662 switch (V.getKind()) {
1663 case APValue::None:
1664 case APValue::Indeterminate:
1665 // FIXME: MSVC doesn't allow this, so we can't be sure how it should be
1666 // mangled.
1667 if (WithScalarType)
1668 mangleType(T, SourceRange(), QMM_Escape);
1669 Out << '@';
1670 return;
1671
1672 case APValue::Int:
1673 if (WithScalarType)
1674 mangleType(T, SourceRange(), QMM_Escape);
1675 Out << '0';
1676 mangleNumber(V.getInt());
1677 return;
1678
1679 case APValue::Float:
1680 if (WithScalarType)
1681 mangleType(T, SourceRange(), QMM_Escape);
1682 mangleFloat(V.getFloat());
1683 return;
1684
1685 case APValue::LValue: {
1686 if (WithScalarType)
1687 mangleType(T, SourceRange(), QMM_Escape);
1688
1689 // We don't know how to mangle past-the-end pointers yet.
1690 if (V.isLValueOnePastTheEnd())
1691 break;
1692
1693 APValue::LValueBase Base = V.getLValueBase();
1694 if (!V.hasLValuePath() || V.getLValuePath().empty()) {
1695 // Taking the address of a complete object has a special-case mangling.
1696 if (Base.isNull()) {
1697 // MSVC emits 0A@ for null pointers. Generalize this for arbitrary
1698 // integers cast to pointers.
1699 // FIXME: This mangles 0 cast to a pointer the same as a null pointer,
1700 // even in cases where the two are different values.
1701 Out << "0";
1702 mangleNumber(V.getLValueOffset().getQuantity());
1703 } else if (!V.hasLValuePath()) {
1704 // FIXME: This can only happen as an extension. Invent a mangling.
1705 break;
1706 } else if (auto *VD = Base.dyn_cast<const ValueDecl*>()) {
1707 Out << (T->isReferenceType() ? "E" : "1");
1708 mangle(VD);
1709 } else {
1710 break;
1711 }
1712 } else {
1713 unsigned NumAts = 0;
1714 if (T->isPointerType()) {
1715 Out << "5";
1716 ++NumAts;
1717 }
1718
1719 QualType T = Base.getType();
1720 for (APValue::LValuePathEntry E : V.getLValuePath()) {
1721 // We don't know how to mangle array subscripting yet.
1722 if (T->isArrayType())
1723 goto mangling_unknown;
1724
1725 const Decl *D = E.getAsBaseOrMember().getPointer();
1726 auto *FD = dyn_cast<FieldDecl>(D);
1727 // We don't know how to mangle derived-to-base conversions yet.
1728 if (!FD)
1729 goto mangling_unknown;
1730
1731 Out << "6";
1732 ++NumAts;
1733 T = FD->getType();
1734 }
1735
1736 auto *VD = Base.dyn_cast<const ValueDecl*>();
1737 if (!VD)
1738 break;
1739 Out << "E";
1740 mangle(VD);
1741
1742 for (APValue::LValuePathEntry E : V.getLValuePath()) {
1743 const Decl *D = E.getAsBaseOrMember().getPointer();
1744 mangleUnqualifiedName(cast<FieldDecl>(D));
1745 }
1746 for (unsigned I = 0; I != NumAts; ++I)
1747 Out << '@';
1748 }
1749
1750 return;
1751 }
1752
1753 case APValue::MemberPointer: {
1754 if (WithScalarType)
1755 mangleType(T, SourceRange(), QMM_Escape);
1756
1757 // FIXME: The below manglings don't include a conversion, so bail if there
1758 // would be one. MSVC mangles the (possibly converted) value of the
1759 // pointer-to-member object as if it were a struct, leading to collisions
1760 // in some cases.
1761 if (!V.getMemberPointerPath().empty())
1762 break;
1763
1764 const CXXRecordDecl *RD =
1765 T->castAs<MemberPointerType>()->getMostRecentCXXRecordDecl();
1766 const ValueDecl *D = V.getMemberPointerDecl();
1767 if (T->isMemberDataPointerType())
1768 mangleMemberDataPointer(RD, D, "");
1769 else
1770 mangleMemberFunctionPointer(RD, cast_or_null<CXXMethodDecl>(D), "");
1771 return;
1772 }
1773
1774 case APValue::Struct: {
1775 Out << '2';
1776 mangleType(T, SourceRange(), QMM_Escape);
1777 const CXXRecordDecl *RD = T->getAsCXXRecordDecl();
1778 assert(RD && "unexpected type for record value")(static_cast <bool> (RD && "unexpected type for record value"
) ? void (0) : __assert_fail ("RD && \"unexpected type for record value\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 1778, __extension__ __PRETTY_FUNCTION__))
;
1779
1780 unsigned BaseIndex = 0;
1781 for (const CXXBaseSpecifier &B : RD->bases())
1782 mangleTemplateArgValue(B.getType(), V.getStructBase(BaseIndex++));
1783 for (const FieldDecl *FD : RD->fields())
1784 if (!FD->isUnnamedBitfield())
1785 mangleTemplateArgValue(FD->getType(),
1786 V.getStructField(FD->getFieldIndex()),
1787 /*WithScalarType*/ true);
1788 Out << '@';
1789 return;
1790 }
1791
1792 case APValue::Union:
1793 Out << '7';
1794 mangleType(T, SourceRange(), QMM_Escape);
1795 if (const FieldDecl *FD = V.getUnionField()) {
1796 mangleUnqualifiedName(FD);
1797 mangleTemplateArgValue(FD->getType(), V.getUnionValue());
1798 }
1799 Out << '@';
1800 return;
1801
1802 case APValue::ComplexInt:
1803 // We mangle complex types as structs, so mangle the value as a struct too.
1804 Out << '2';
1805 mangleType(T, SourceRange(), QMM_Escape);
1806 Out << '0';
1807 mangleNumber(V.getComplexIntReal());
1808 Out << '0';
1809 mangleNumber(V.getComplexIntImag());
1810 Out << '@';
1811 return;
1812
1813 case APValue::ComplexFloat:
1814 Out << '2';
1815 mangleType(T, SourceRange(), QMM_Escape);
1816 mangleFloat(V.getComplexFloatReal());
1817 mangleFloat(V.getComplexFloatImag());
1818 Out << '@';
1819 return;
1820
1821 case APValue::Array: {
1822 Out << '3';
1823 QualType ElemT = getASTContext().getAsArrayType(T)->getElementType();
1824 mangleType(ElemT, SourceRange(), QMM_Escape);
1825 for (unsigned I = 0, N = V.getArraySize(); I != N; ++I) {
1826 const APValue &ElemV = I < V.getArrayInitializedElts()
1827 ? V.getArrayInitializedElt(I)
1828 : V.getArrayFiller();
1829 mangleTemplateArgValue(ElemT, ElemV);
1830 Out << '@';
1831 }
1832 Out << '@';
1833 return;
1834 }
1835
1836 case APValue::Vector: {
1837 // __m128 is mangled as a struct containing an array. We follow this
1838 // approach for all vector types.
1839 Out << '2';
1840 mangleType(T, SourceRange(), QMM_Escape);
1841 Out << '3';
1842 QualType ElemT = T->castAs<VectorType>()->getElementType();
1843 mangleType(ElemT, SourceRange(), QMM_Escape);
1844 for (unsigned I = 0, N = V.getVectorLength(); I != N; ++I) {
1845 const APValue &ElemV = V.getVectorElt(I);
1846 mangleTemplateArgValue(ElemT, ElemV);
1847 Out << '@';
1848 }
1849 Out << "@@";
1850 return;
1851 }
1852
1853 case APValue::AddrLabelDiff:
1854 case APValue::FixedPoint:
1855 break;
1856 }
1857
1858mangling_unknown:
1859 DiagnosticsEngine &Diags = Context.getDiags();
1860 unsigned DiagID = Diags.getCustomDiagID(
1861 DiagnosticsEngine::Error, "cannot mangle this template argument yet");
1862 Diags.Report(DiagID);
1863}
1864
1865void MicrosoftCXXNameMangler::mangleObjCProtocol(const ObjCProtocolDecl *PD) {
1866 llvm::SmallString<64> TemplateMangling;
1867 llvm::raw_svector_ostream Stream(TemplateMangling);
1868 MicrosoftCXXNameMangler Extra(Context, Stream);
1869
1870 Stream << "?$";
1871 Extra.mangleSourceName("Protocol");
1872 Extra.mangleArtificialTagType(TTK_Struct, PD->getName());
1873
1874 mangleArtificialTagType(TTK_Struct, TemplateMangling, {"__ObjC"});
1875}
1876
1877void MicrosoftCXXNameMangler::mangleObjCLifetime(const QualType Type,
1878 Qualifiers Quals,
1879 SourceRange Range) {
1880 llvm::SmallString<64> TemplateMangling;
1881 llvm::raw_svector_ostream Stream(TemplateMangling);
1882 MicrosoftCXXNameMangler Extra(Context, Stream);
1883
1884 Stream << "?$";
1885 switch (Quals.getObjCLifetime()) {
1886 case Qualifiers::OCL_None:
1887 case Qualifiers::OCL_ExplicitNone:
1888 break;
1889 case Qualifiers::OCL_Autoreleasing:
1890 Extra.mangleSourceName("Autoreleasing");
1891 break;
1892 case Qualifiers::OCL_Strong:
1893 Extra.mangleSourceName("Strong");
1894 break;
1895 case Qualifiers::OCL_Weak:
1896 Extra.mangleSourceName("Weak");
1897 break;
1898 }
1899 Extra.manglePointerCVQualifiers(Quals);
1900 Extra.manglePointerExtQualifiers(Quals, Type);
1901 Extra.mangleType(Type, Range);
1902
1903 mangleArtificialTagType(TTK_Struct, TemplateMangling, {"__ObjC"});
1904}
1905
1906void MicrosoftCXXNameMangler::mangleObjCKindOfType(const ObjCObjectType *T,
1907 Qualifiers Quals,
1908 SourceRange Range) {
1909 llvm::SmallString<64> TemplateMangling;
1910 llvm::raw_svector_ostream Stream(TemplateMangling);
1911 MicrosoftCXXNameMangler Extra(Context, Stream);
1912
1913 Stream << "?$";
1914 Extra.mangleSourceName("KindOf");
1915 Extra.mangleType(QualType(T, 0)
4
Assuming the object is not a 'ObjCObjectType'
5
Passing null pointer value via 1st parameter 'T'
6
Calling 'MicrosoftCXXNameMangler::mangleType'
1916 .stripObjCKindOfType(getASTContext())
1917 ->getAs<ObjCObjectType>(),
1918 Quals, Range);
1919
1920 mangleArtificialTagType(TTK_Struct, TemplateMangling, {"__ObjC"});
1921}
1922
1923void MicrosoftCXXNameMangler::mangleQualifiers(Qualifiers Quals,
1924 bool IsMember) {
1925 // <cvr-qualifiers> ::= [E] [F] [I] <base-cvr-qualifiers>
1926 // 'E' means __ptr64 (32-bit only); 'F' means __unaligned (32/64-bit only);
1927 // 'I' means __restrict (32/64-bit).
1928 // Note that the MSVC __restrict keyword isn't the same as the C99 restrict
1929 // keyword!
1930 // <base-cvr-qualifiers> ::= A # near
1931 // ::= B # near const
1932 // ::= C # near volatile
1933 // ::= D # near const volatile
1934 // ::= E # far (16-bit)
1935 // ::= F # far const (16-bit)
1936 // ::= G # far volatile (16-bit)
1937 // ::= H # far const volatile (16-bit)
1938 // ::= I # huge (16-bit)
1939 // ::= J # huge const (16-bit)
1940 // ::= K # huge volatile (16-bit)
1941 // ::= L # huge const volatile (16-bit)
1942 // ::= M <basis> # based
1943 // ::= N <basis> # based const
1944 // ::= O <basis> # based volatile
1945 // ::= P <basis> # based const volatile
1946 // ::= Q # near member
1947 // ::= R # near const member
1948 // ::= S # near volatile member
1949 // ::= T # near const volatile member
1950 // ::= U # far member (16-bit)
1951 // ::= V # far const member (16-bit)
1952 // ::= W # far volatile member (16-bit)
1953 // ::= X # far const volatile member (16-bit)
1954 // ::= Y # huge member (16-bit)
1955 // ::= Z # huge const member (16-bit)
1956 // ::= 0 # huge volatile member (16-bit)
1957 // ::= 1 # huge const volatile member (16-bit)
1958 // ::= 2 <basis> # based member
1959 // ::= 3 <basis> # based const member
1960 // ::= 4 <basis> # based volatile member
1961 // ::= 5 <basis> # based const volatile member
1962 // ::= 6 # near function (pointers only)
1963 // ::= 7 # far function (pointers only)
1964 // ::= 8 # near method (pointers only)
1965 // ::= 9 # far method (pointers only)
1966 // ::= _A <basis> # based function (pointers only)
1967 // ::= _B <basis> # based function (far?) (pointers only)
1968 // ::= _C <basis> # based method (pointers only)
1969 // ::= _D <basis> # based method (far?) (pointers only)
1970 // ::= _E # block (Clang)
1971 // <basis> ::= 0 # __based(void)
1972 // ::= 1 # __based(segment)?
1973 // ::= 2 <name> # __based(name)
1974 // ::= 3 # ?
1975 // ::= 4 # ?
1976 // ::= 5 # not really based
1977 bool HasConst = Quals.hasConst(),
1978 HasVolatile = Quals.hasVolatile();
1979
1980 if (!IsMember) {
1981 if (HasConst && HasVolatile) {
1982 Out << 'D';
1983 } else if (HasVolatile) {
1984 Out << 'C';
1985 } else if (HasConst) {
1986 Out << 'B';
1987 } else {
1988 Out << 'A';
1989 }
1990 } else {
1991 if (HasConst && HasVolatile) {
1992 Out << 'T';
1993 } else if (HasVolatile) {
1994 Out << 'S';
1995 } else if (HasConst) {
1996 Out << 'R';
1997 } else {
1998 Out << 'Q';
1999 }
2000 }
2001
2002 // FIXME: For now, just drop all extension qualifiers on the floor.
2003}
2004
2005void
2006MicrosoftCXXNameMangler::mangleRefQualifier(RefQualifierKind RefQualifier) {
2007 // <ref-qualifier> ::= G # lvalue reference
2008 // ::= H # rvalue-reference
2009 switch (RefQualifier) {
2010 case RQ_None:
2011 break;
2012
2013 case RQ_LValue:
2014 Out << 'G';
2015 break;
2016
2017 case RQ_RValue:
2018 Out << 'H';
2019 break;
2020 }
2021}
2022
2023void MicrosoftCXXNameMangler::manglePointerExtQualifiers(Qualifiers Quals,
2024 QualType PointeeType) {
2025 // Check if this is a default 64-bit pointer or has __ptr64 qualifier.
2026 bool is64Bit = PointeeType.isNull() ? PointersAre64Bit :
2027 is64BitPointer(PointeeType.getQualifiers());
2028 if (is64Bit && (PointeeType.isNull() || !PointeeType->isFunctionType()))
2029 Out << 'E';
2030
2031 if (Quals.hasRestrict())
2032 Out << 'I';
2033
2034 if (Quals.hasUnaligned() ||
2035 (!PointeeType.isNull() && PointeeType.getLocalQualifiers().hasUnaligned()))
2036 Out << 'F';
2037}
2038
2039void MicrosoftCXXNameMangler::manglePointerCVQualifiers(Qualifiers Quals) {
2040 // <pointer-cv-qualifiers> ::= P # no qualifiers
2041 // ::= Q # const
2042 // ::= R # volatile
2043 // ::= S # const volatile
2044 bool HasConst = Quals.hasConst(),
2045 HasVolatile = Quals.hasVolatile();
2046
2047 if (HasConst && HasVolatile) {
2048 Out << 'S';
2049 } else if (HasVolatile) {
2050 Out << 'R';
2051 } else if (HasConst) {
2052 Out << 'Q';
2053 } else {
2054 Out << 'P';
2055 }
2056}
2057
2058void MicrosoftCXXNameMangler::mangleFunctionArgumentType(QualType T,
2059 SourceRange Range) {
2060 // MSVC will backreference two canonically equivalent types that have slightly
2061 // different manglings when mangled alone.
2062
2063 // Decayed types do not match up with non-decayed versions of the same type.
2064 //
2065 // e.g.
2066 // void (*x)(void) will not form a backreference with void x(void)
2067 void *TypePtr;
2068 if (const auto *DT = T->getAs<DecayedType>()) {
2069 QualType OriginalType = DT->getOriginalType();
2070 // All decayed ArrayTypes should be treated identically; as-if they were
2071 // a decayed IncompleteArrayType.
2072 if (const auto *AT = getASTContext().getAsArrayType(OriginalType))
2073 OriginalType = getASTContext().getIncompleteArrayType(
2074 AT->getElementType(), AT->getSizeModifier(),
2075 AT->getIndexTypeCVRQualifiers());
2076
2077 TypePtr = OriginalType.getCanonicalType().getAsOpaquePtr();
2078 // If the original parameter was textually written as an array,
2079 // instead treat the decayed parameter like it's const.
2080 //
2081 // e.g.
2082 // int [] -> int * const
2083 if (OriginalType->isArrayType())
2084 T = T.withConst();
2085 } else {
2086 TypePtr = T.getCanonicalType().getAsOpaquePtr();
2087 }
2088
2089 ArgBackRefMap::iterator Found = FunArgBackReferences.find(TypePtr);
2090
2091 if (Found == FunArgBackReferences.end()) {
2092 size_t OutSizeBefore = Out.tell();
2093
2094 mangleType(T, Range, QMM_Drop);
2095
2096 // See if it's worth creating a back reference.
2097 // Only types longer than 1 character are considered
2098 // and only 10 back references slots are available:
2099 bool LongerThanOneChar = (Out.tell() - OutSizeBefore > 1);
2100 if (LongerThanOneChar && FunArgBackReferences.size() < 10) {
2101 size_t Size = FunArgBackReferences.size();
2102 FunArgBackReferences[TypePtr] = Size;
2103 }
2104 } else {
2105 Out << Found->second;
2106 }
2107}
2108
2109void MicrosoftCXXNameMangler::manglePassObjectSizeArg(
2110 const PassObjectSizeAttr *POSA) {
2111 int Type = POSA->getType();
2112 bool Dynamic = POSA->isDynamic();
2113
2114 auto Iter = PassObjectSizeArgs.insert({Type, Dynamic}).first;
2115 auto *TypePtr = (const void *)&*Iter;
2116 ArgBackRefMap::iterator Found = FunArgBackReferences.find(TypePtr);
2117
2118 if (Found == FunArgBackReferences.end()) {
2119 std::string Name =
2120 Dynamic ? "__pass_dynamic_object_size" : "__pass_object_size";
2121 mangleArtificialTagType(TTK_Enum, Name + llvm::utostr(Type), {"__clang"});
2122
2123 if (FunArgBackReferences.size() < 10) {
2124 size_t Size = FunArgBackReferences.size();
2125 FunArgBackReferences[TypePtr] = Size;
2126 }
2127 } else {
2128 Out << Found->second;
2129 }
2130}
2131
2132void MicrosoftCXXNameMangler::mangleAddressSpaceType(QualType T,
2133 Qualifiers Quals,
2134 SourceRange Range) {
2135 // Address space is mangled as an unqualified templated type in the __clang
2136 // namespace. The demangled version of this is:
2137 // In the case of a language specific address space:
2138 // __clang::struct _AS[language_addr_space]<Type>
2139 // where:
2140 // <language_addr_space> ::= <OpenCL-addrspace> | <CUDA-addrspace>
2141 // <OpenCL-addrspace> ::= "CL" [ "global" | "local" | "constant" |
2142 // "private"| "generic" | "device" | "host" ]
2143 // <CUDA-addrspace> ::= "CU" [ "device" | "constant" | "shared" ]
2144 // Note that the above were chosen to match the Itanium mangling for this.
2145 //
2146 // In the case of a non-language specific address space:
2147 // __clang::struct _AS<TargetAS, Type>
2148 assert(Quals.hasAddressSpace() && "Not valid without address space")(static_cast <bool> (Quals.hasAddressSpace() &&
"Not valid without address space") ? void (0) : __assert_fail
("Quals.hasAddressSpace() && \"Not valid without address space\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2148, __extension__ __PRETTY_FUNCTION__))
;
2149 llvm::SmallString<32> ASMangling;
2150 llvm::raw_svector_ostream Stream(ASMangling);
2151 MicrosoftCXXNameMangler Extra(Context, Stream);
2152 Stream << "?$";
2153
2154 LangAS AS = Quals.getAddressSpace();
2155 if (Context.getASTContext().addressSpaceMapManglingFor(AS)) {
2156 unsigned TargetAS = Context.getASTContext().getTargetAddressSpace(AS);
2157 Extra.mangleSourceName("_AS");
2158 Extra.mangleIntegerLiteral(llvm::APSInt::getUnsigned(TargetAS));
2159 } else {
2160 switch (AS) {
2161 default:
2162 llvm_unreachable("Not a language specific address space")::llvm::llvm_unreachable_internal("Not a language specific address space"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2162)
;
2163 case LangAS::opencl_global:
2164 Extra.mangleSourceName("_ASCLglobal");
2165 break;
2166 case LangAS::opencl_global_device:
2167 Extra.mangleSourceName("_ASCLdevice");
2168 break;
2169 case LangAS::opencl_global_host:
2170 Extra.mangleSourceName("_ASCLhost");
2171 break;
2172 case LangAS::opencl_local:
2173 Extra.mangleSourceName("_ASCLlocal");
2174 break;
2175 case LangAS::opencl_constant:
2176 Extra.mangleSourceName("_ASCLconstant");
2177 break;
2178 case LangAS::opencl_private:
2179 Extra.mangleSourceName("_ASCLprivate");
2180 break;
2181 case LangAS::opencl_generic:
2182 Extra.mangleSourceName("_ASCLgeneric");
2183 break;
2184 case LangAS::cuda_device:
2185 Extra.mangleSourceName("_ASCUdevice");
2186 break;
2187 case LangAS::cuda_constant:
2188 Extra.mangleSourceName("_ASCUconstant");
2189 break;
2190 case LangAS::cuda_shared:
2191 Extra.mangleSourceName("_ASCUshared");
2192 break;
2193 case LangAS::ptr32_sptr:
2194 case LangAS::ptr32_uptr:
2195 case LangAS::ptr64:
2196 llvm_unreachable("don't mangle ptr address spaces with _AS")::llvm::llvm_unreachable_internal("don't mangle ptr address spaces with _AS"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2196)
;
2197 }
2198 }
2199
2200 Extra.mangleType(T, Range, QMM_Escape);
2201 mangleQualifiers(Qualifiers(), false);
2202 mangleArtificialTagType(TTK_Struct, ASMangling, {"__clang"});
2203}
2204
2205void MicrosoftCXXNameMangler::mangleType(QualType T, SourceRange Range,
2206 QualifierMangleMode QMM) {
2207 // Don't use the canonical types. MSVC includes things like 'const' on
2208 // pointer arguments to function pointers that canonicalization strips away.
2209 T = T.getDesugaredType(getASTContext());
2210 Qualifiers Quals = T.getLocalQualifiers();
2211
2212 if (const ArrayType *AT = getASTContext().getAsArrayType(T)) {
2213 // If there were any Quals, getAsArrayType() pushed them onto the array
2214 // element type.
2215 if (QMM == QMM_Mangle)
2216 Out << 'A';
2217 else if (QMM == QMM_Escape || QMM == QMM_Result)
2218 Out << "$$B";
2219 mangleArrayType(AT);
2220 return;
2221 }
2222
2223 bool IsPointer = T->isAnyPointerType() || T->isMemberPointerType() ||
2224 T->isReferenceType() || T->isBlockPointerType();
2225
2226 switch (QMM) {
2227 case QMM_Drop:
2228 if (Quals.hasObjCLifetime())
2229 Quals = Quals.withoutObjCLifetime();
2230 break;
2231 case QMM_Mangle:
2232 if (const FunctionType *FT = dyn_cast<FunctionType>(T)) {
2233 Out << '6';
2234 mangleFunctionType(FT);
2235 return;
2236 }
2237 mangleQualifiers(Quals, false);
2238 break;
2239 case QMM_Escape:
2240 if (!IsPointer && Quals) {
2241 Out << "$$C";
2242 mangleQualifiers(Quals, false);
2243 }
2244 break;
2245 case QMM_Result:
2246 // Presence of __unaligned qualifier shouldn't affect mangling here.
2247 Quals.removeUnaligned();
2248 if (Quals.hasObjCLifetime())
2249 Quals = Quals.withoutObjCLifetime();
2250 if ((!IsPointer && Quals) || isa<TagType>(T) || isArtificialTagType(T)) {
2251 Out << '?';
2252 mangleQualifiers(Quals, false);
2253 }
2254 break;
2255 }
2256
2257 const Type *ty = T.getTypePtr();
2258
2259 switch (ty->getTypeClass()) {
2260#define ABSTRACT_TYPE(CLASS, PARENT)
2261#define NON_CANONICAL_TYPE(CLASS, PARENT) \
2262 case Type::CLASS: \
2263 llvm_unreachable("can't mangle non-canonical type " #CLASS "Type")::llvm::llvm_unreachable_internal("can't mangle non-canonical type "
#CLASS "Type", "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2263)
; \
2264 return;
2265#define TYPE(CLASS, PARENT) \
2266 case Type::CLASS: \
2267 mangleType(cast<CLASS##Type>(ty), Quals, Range); \
2268 break;
2269#include "clang/AST/TypeNodes.inc"
2270#undef ABSTRACT_TYPE
2271#undef NON_CANONICAL_TYPE
2272#undef TYPE
2273 }
2274}
2275
2276void MicrosoftCXXNameMangler::mangleType(const BuiltinType *T, Qualifiers,
2277 SourceRange Range) {
2278 // <type> ::= <builtin-type>
2279 // <builtin-type> ::= X # void
2280 // ::= C # signed char
2281 // ::= D # char
2282 // ::= E # unsigned char
2283 // ::= F # short
2284 // ::= G # unsigned short (or wchar_t if it's not a builtin)
2285 // ::= H # int
2286 // ::= I # unsigned int
2287 // ::= J # long
2288 // ::= K # unsigned long
2289 // L # <none>
2290 // ::= M # float
2291 // ::= N # double
2292 // ::= O # long double (__float80 is mangled differently)
2293 // ::= _J # long long, __int64
2294 // ::= _K # unsigned long long, __int64
2295 // ::= _L # __int128
2296 // ::= _M # unsigned __int128
2297 // ::= _N # bool
2298 // _O # <array in parameter>
2299 // ::= _Q # char8_t
2300 // ::= _S # char16_t
2301 // ::= _T # __float80 (Intel)
2302 // ::= _U # char32_t
2303 // ::= _W # wchar_t
2304 // ::= _Z # __float80 (Digital Mars)
2305 switch (T->getKind()) {
2306 case BuiltinType::Void:
2307 Out << 'X';
2308 break;
2309 case BuiltinType::SChar:
2310 Out << 'C';
2311 break;
2312 case BuiltinType::Char_U:
2313 case BuiltinType::Char_S:
2314 Out << 'D';
2315 break;
2316 case BuiltinType::UChar:
2317 Out << 'E';
2318 break;
2319 case BuiltinType::Short:
2320 Out << 'F';
2321 break;
2322 case BuiltinType::UShort:
2323 Out << 'G';
2324 break;
2325 case BuiltinType::Int:
2326 Out << 'H';
2327 break;
2328 case BuiltinType::UInt:
2329 Out << 'I';
2330 break;
2331 case BuiltinType::Long:
2332 Out << 'J';
2333 break;
2334 case BuiltinType::ULong:
2335 Out << 'K';
2336 break;
2337 case BuiltinType::Float:
2338 Out << 'M';
2339 break;
2340 case BuiltinType::Double:
2341 Out << 'N';
2342 break;
2343 // TODO: Determine size and mangle accordingly
2344 case BuiltinType::LongDouble:
2345 Out << 'O';
2346 break;
2347 case BuiltinType::LongLong:
2348 Out << "_J";
2349 break;
2350 case BuiltinType::ULongLong:
2351 Out << "_K";
2352 break;
2353 case BuiltinType::Int128:
2354 Out << "_L";
2355 break;
2356 case BuiltinType::UInt128:
2357 Out << "_M";
2358 break;
2359 case BuiltinType::Bool:
2360 Out << "_N";
2361 break;
2362 case BuiltinType::Char8:
2363 Out << "_Q";
2364 break;
2365 case BuiltinType::Char16:
2366 Out << "_S";
2367 break;
2368 case BuiltinType::Char32:
2369 Out << "_U";
2370 break;
2371 case BuiltinType::WChar_S:
2372 case BuiltinType::WChar_U:
2373 Out << "_W";
2374 break;
2375
2376#define BUILTIN_TYPE(Id, SingletonId)
2377#define PLACEHOLDER_TYPE(Id, SingletonId) \
2378 case BuiltinType::Id:
2379#include "clang/AST/BuiltinTypes.def"
2380 case BuiltinType::Dependent:
2381 llvm_unreachable("placeholder types shouldn't get to name mangling")::llvm::llvm_unreachable_internal("placeholder types shouldn't get to name mangling"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2381)
;
2382
2383 case BuiltinType::ObjCId:
2384 mangleArtificialTagType(TTK_Struct, "objc_object");
2385 break;
2386 case BuiltinType::ObjCClass:
2387 mangleArtificialTagType(TTK_Struct, "objc_class");
2388 break;
2389 case BuiltinType::ObjCSel:
2390 mangleArtificialTagType(TTK_Struct, "objc_selector");
2391 break;
2392
2393#define IMAGE_TYPE(ImgType, Id, SingletonId, Access, Suffix) \
2394 case BuiltinType::Id: \
2395 Out << "PAUocl_" #ImgType "_" #Suffix "@@"; \
2396 break;
2397#include "clang/Basic/OpenCLImageTypes.def"
2398 case BuiltinType::OCLSampler:
2399 Out << "PA";
2400 mangleArtificialTagType(TTK_Struct, "ocl_sampler");
2401 break;
2402 case BuiltinType::OCLEvent:
2403 Out << "PA";
2404 mangleArtificialTagType(TTK_Struct, "ocl_event");
2405 break;
2406 case BuiltinType::OCLClkEvent:
2407 Out << "PA";
2408 mangleArtificialTagType(TTK_Struct, "ocl_clkevent");
2409 break;
2410 case BuiltinType::OCLQueue:
2411 Out << "PA";
2412 mangleArtificialTagType(TTK_Struct, "ocl_queue");
2413 break;
2414 case BuiltinType::OCLReserveID:
2415 Out << "PA";
2416 mangleArtificialTagType(TTK_Struct, "ocl_reserveid");
2417 break;
2418#define EXT_OPAQUE_TYPE(ExtType, Id, Ext) \
2419 case BuiltinType::Id: \
2420 mangleArtificialTagType(TTK_Struct, "ocl_" #ExtType); \
2421 break;
2422#include "clang/Basic/OpenCLExtensionTypes.def"
2423
2424 case BuiltinType::NullPtr:
2425 Out << "$$T";
2426 break;
2427
2428 case BuiltinType::Float16:
2429 mangleArtificialTagType(TTK_Struct, "_Float16", {"__clang"});
2430 break;
2431
2432 case BuiltinType::Half:
2433 mangleArtificialTagType(TTK_Struct, "_Half", {"__clang"});
2434 break;
2435
2436#define SVE_TYPE(Name, Id, SingletonId) \
2437 case BuiltinType::Id:
2438#include "clang/Basic/AArch64SVEACLETypes.def"
2439#define PPC_VECTOR_TYPE(Name, Id, Size) \
2440 case BuiltinType::Id:
2441#include "clang/Basic/PPCTypes.def"
2442#define RVV_TYPE(Name, Id, SingletonId) case BuiltinType::Id:
2443#include "clang/Basic/RISCVVTypes.def"
2444 case BuiltinType::ShortAccum:
2445 case BuiltinType::Accum:
2446 case BuiltinType::LongAccum:
2447 case BuiltinType::UShortAccum:
2448 case BuiltinType::UAccum:
2449 case BuiltinType::ULongAccum:
2450 case BuiltinType::ShortFract:
2451 case BuiltinType::Fract:
2452 case BuiltinType::LongFract:
2453 case BuiltinType::UShortFract:
2454 case BuiltinType::UFract:
2455 case BuiltinType::ULongFract:
2456 case BuiltinType::SatShortAccum:
2457 case BuiltinType::SatAccum:
2458 case BuiltinType::SatLongAccum:
2459 case BuiltinType::SatUShortAccum:
2460 case BuiltinType::SatUAccum:
2461 case BuiltinType::SatULongAccum:
2462 case BuiltinType::SatShortFract:
2463 case BuiltinType::SatFract:
2464 case BuiltinType::SatLongFract:
2465 case BuiltinType::SatUShortFract:
2466 case BuiltinType::SatUFract:
2467 case BuiltinType::SatULongFract:
2468 case BuiltinType::BFloat16:
2469 case BuiltinType::Float128: {
2470 DiagnosticsEngine &Diags = Context.getDiags();
2471 unsigned DiagID = Diags.getCustomDiagID(
2472 DiagnosticsEngine::Error, "cannot mangle this built-in %0 type yet");
2473 Diags.Report(Range.getBegin(), DiagID)
2474 << T->getName(Context.getASTContext().getPrintingPolicy()) << Range;
2475 break;
2476 }
2477 }
2478}
2479
2480// <type> ::= <function-type>
2481void MicrosoftCXXNameMangler::mangleType(const FunctionProtoType *T, Qualifiers,
2482 SourceRange) {
2483 // Structors only appear in decls, so at this point we know it's not a
2484 // structor type.
2485 // FIXME: This may not be lambda-friendly.
2486 if (T->getMethodQuals() || T->getRefQualifier() != RQ_None) {
2487 Out << "$$A8@@";
2488 mangleFunctionType(T, /*D=*/nullptr, /*ForceThisQuals=*/true);
2489 } else {
2490 Out << "$$A6";
2491 mangleFunctionType(T);
2492 }
2493}
2494void MicrosoftCXXNameMangler::mangleType(const FunctionNoProtoType *T,
2495 Qualifiers, SourceRange) {
2496 Out << "$$A6";
2497 mangleFunctionType(T);
2498}
2499
2500void MicrosoftCXXNameMangler::mangleFunctionType(const FunctionType *T,
2501 const FunctionDecl *D,
2502 bool ForceThisQuals,
2503 bool MangleExceptionSpec) {
2504 // <function-type> ::= <this-cvr-qualifiers> <calling-convention>
2505 // <return-type> <argument-list> <throw-spec>
2506 const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(T);
2507
2508 SourceRange Range;
2509 if (D) Range = D->getSourceRange();
2510
2511 bool IsInLambda = false;
2512 bool IsStructor = false, HasThisQuals = ForceThisQuals, IsCtorClosure = false;
2513 CallingConv CC = T->getCallConv();
2514 if (const CXXMethodDecl *MD = dyn_cast_or_null<CXXMethodDecl>(D)) {
2515 if (MD->getParent()->isLambda())
2516 IsInLambda = true;
2517 if (MD->isInstance())
2518 HasThisQuals = true;
2519 if (isa<CXXDestructorDecl>(MD)) {
2520 IsStructor = true;
2521 } else if (isa<CXXConstructorDecl>(MD)) {
2522 IsStructor = true;
2523 IsCtorClosure = (StructorType == Ctor_CopyingClosure ||
2524 StructorType == Ctor_DefaultClosure) &&
2525 isStructorDecl(MD);
2526 if (IsCtorClosure)
2527 CC = getASTContext().getDefaultCallingConvention(
2528 /*IsVariadic=*/false, /*IsCXXMethod=*/true);
2529 }
2530 }
2531
2532 // If this is a C++ instance method, mangle the CVR qualifiers for the
2533 // this pointer.
2534 if (HasThisQuals) {
2535 Qualifiers Quals = Proto->getMethodQuals();
2536 manglePointerExtQualifiers(Quals, /*PointeeType=*/QualType());
2537 mangleRefQualifier(Proto->getRefQualifier());
2538 mangleQualifiers(Quals, /*IsMember=*/false);
2539 }
2540
2541 mangleCallingConvention(CC);
2542
2543 // <return-type> ::= <type>
2544 // ::= @ # structors (they have no declared return type)
2545 if (IsStructor) {
2546 if (isa<CXXDestructorDecl>(D) && isStructorDecl(D)) {
2547 // The scalar deleting destructor takes an extra int argument which is not
2548 // reflected in the AST.
2549 if (StructorType == Dtor_Deleting) {
2550 Out << (PointersAre64Bit ? "PEAXI@Z" : "PAXI@Z");
2551 return;
2552 }
2553 // The vbase destructor returns void which is not reflected in the AST.
2554 if (StructorType == Dtor_Complete) {
2555 Out << "XXZ";
2556 return;
2557 }
2558 }
2559 if (IsCtorClosure) {
2560 // Default constructor closure and copy constructor closure both return
2561 // void.
2562 Out << 'X';
2563
2564 if (StructorType == Ctor_DefaultClosure) {
2565 // Default constructor closure always has no arguments.
2566 Out << 'X';
2567 } else if (StructorType == Ctor_CopyingClosure) {
2568 // Copy constructor closure always takes an unqualified reference.
2569 mangleFunctionArgumentType(getASTContext().getLValueReferenceType(
2570 Proto->getParamType(0)
2571 ->getAs<LValueReferenceType>()
2572 ->getPointeeType(),
2573 /*SpelledAsLValue=*/true),
2574 Range);
2575 Out << '@';
2576 } else {
2577 llvm_unreachable("unexpected constructor closure!")::llvm::llvm_unreachable_internal("unexpected constructor closure!"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2577)
;
2578 }
2579 Out << 'Z';
2580 return;
2581 }
2582 Out << '@';
2583 } else if (IsInLambda && D && isa<CXXConversionDecl>(D)) {
2584 // The only lambda conversion operators are to function pointers, which
2585 // can differ by their calling convention and are typically deduced. So
2586 // we make sure that this type gets mangled properly.
2587 mangleType(T->getReturnType(), Range, QMM_Result);
2588 } else {
2589 QualType ResultType = T->getReturnType();
2590 if (IsInLambda && isa<CXXConversionDecl>(D)) {
2591 // The only lambda conversion operators are to function pointers, which
2592 // can differ by their calling convention and are typically deduced. So
2593 // we make sure that this type gets mangled properly.
2594 mangleType(ResultType, Range, QMM_Result);
2595 } else if (const auto *AT = dyn_cast_or_null<AutoType>(
2596 ResultType->getContainedAutoType())) {
2597 Out << '?';
2598 mangleQualifiers(ResultType.getLocalQualifiers(), /*IsMember=*/false);
2599 Out << '?';
2600 assert(AT->getKeyword() != AutoTypeKeyword::GNUAutoType &&(static_cast <bool> (AT->getKeyword() != AutoTypeKeyword
::GNUAutoType && "shouldn't need to mangle __auto_type!"
) ? void (0) : __assert_fail ("AT->getKeyword() != AutoTypeKeyword::GNUAutoType && \"shouldn't need to mangle __auto_type!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2601, __extension__ __PRETTY_FUNCTION__))
2601 "shouldn't need to mangle __auto_type!")(static_cast <bool> (AT->getKeyword() != AutoTypeKeyword
::GNUAutoType && "shouldn't need to mangle __auto_type!"
) ? void (0) : __assert_fail ("AT->getKeyword() != AutoTypeKeyword::GNUAutoType && \"shouldn't need to mangle __auto_type!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2601, __extension__ __PRETTY_FUNCTION__))
;
2602 mangleSourceName(AT->isDecltypeAuto() ? "<decltype-auto>" : "<auto>");
2603 Out << '@';
2604 } else if (IsInLambda) {
2605 Out << '@';
2606 } else {
2607 if (ResultType->isVoidType())
2608 ResultType = ResultType.getUnqualifiedType();
2609 mangleType(ResultType, Range, QMM_Result);
2610 }
2611 }
2612
2613 // <argument-list> ::= X # void
2614 // ::= <type>+ @
2615 // ::= <type>* Z # varargs
2616 if (!Proto) {
2617 // Function types without prototypes can arise when mangling a function type
2618 // within an overloadable function in C. We mangle these as the absence of
2619 // any parameter types (not even an empty parameter list).
2620 Out << '@';
2621 } else if (Proto->getNumParams() == 0 && !Proto->isVariadic()) {
2622 Out << 'X';
2623 } else {
2624 // Happens for function pointer type arguments for example.
2625 for (unsigned I = 0, E = Proto->getNumParams(); I != E; ++I) {
2626 mangleFunctionArgumentType(Proto->getParamType(I), Range);
2627 // Mangle each pass_object_size parameter as if it's a parameter of enum
2628 // type passed directly after the parameter with the pass_object_size
2629 // attribute. The aforementioned enum's name is __pass_object_size, and we
2630 // pretend it resides in a top-level namespace called __clang.
2631 //
2632 // FIXME: Is there a defined extension notation for the MS ABI, or is it
2633 // necessary to just cross our fingers and hope this type+namespace
2634 // combination doesn't conflict with anything?
2635 if (D)
2636 if (const auto *P = D->getParamDecl(I)->getAttr<PassObjectSizeAttr>())
2637 manglePassObjectSizeArg(P);
2638 }
2639 // <builtin-type> ::= Z # ellipsis
2640 if (Proto->isVariadic())
2641 Out << 'Z';
2642 else
2643 Out << '@';
2644 }
2645
2646 if (MangleExceptionSpec && getASTContext().getLangOpts().CPlusPlus17 &&
2647 getASTContext().getLangOpts().isCompatibleWithMSVC(
2648 LangOptions::MSVC2017_5))
2649 mangleThrowSpecification(Proto);
2650 else
2651 Out << 'Z';
2652}
2653
2654void MicrosoftCXXNameMangler::mangleFunctionClass(const FunctionDecl *FD) {
2655 // <function-class> ::= <member-function> E? # E designates a 64-bit 'this'
2656 // # pointer. in 64-bit mode *all*
2657 // # 'this' pointers are 64-bit.
2658 // ::= <global-function>
2659 // <member-function> ::= A # private: near
2660 // ::= B # private: far
2661 // ::= C # private: static near
2662 // ::= D # private: static far
2663 // ::= E # private: virtual near
2664 // ::= F # private: virtual far
2665 // ::= I # protected: near
2666 // ::= J # protected: far
2667 // ::= K # protected: static near
2668 // ::= L # protected: static far
2669 // ::= M # protected: virtual near
2670 // ::= N # protected: virtual far
2671 // ::= Q # public: near
2672 // ::= R # public: far
2673 // ::= S # public: static near
2674 // ::= T # public: static far
2675 // ::= U # public: virtual near
2676 // ::= V # public: virtual far
2677 // <global-function> ::= Y # global near
2678 // ::= Z # global far
2679 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
2680 bool IsVirtual = MD->isVirtual();
2681 // When mangling vbase destructor variants, ignore whether or not the
2682 // underlying destructor was defined to be virtual.
2683 if (isa<CXXDestructorDecl>(MD) && isStructorDecl(MD) &&
2684 StructorType == Dtor_Complete) {
2685 IsVirtual = false;
2686 }
2687 switch (MD->getAccess()) {
2688 case AS_none:
2689 llvm_unreachable("Unsupported access specifier")::llvm::llvm_unreachable_internal("Unsupported access specifier"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2689)
;
2690 case AS_private:
2691 if (MD->isStatic())
2692 Out << 'C';
2693 else if (IsVirtual)
2694 Out << 'E';
2695 else
2696 Out << 'A';
2697 break;
2698 case AS_protected:
2699 if (MD->isStatic())
2700 Out << 'K';
2701 else if (IsVirtual)
2702 Out << 'M';
2703 else
2704 Out << 'I';
2705 break;
2706 case AS_public:
2707 if (MD->isStatic())
2708 Out << 'S';
2709 else if (IsVirtual)
2710 Out << 'U';
2711 else
2712 Out << 'Q';
2713 }
2714 } else {
2715 Out << 'Y';
2716 }
2717}
2718void MicrosoftCXXNameMangler::mangleCallingConvention(CallingConv CC) {
2719 // <calling-convention> ::= A # __cdecl
2720 // ::= B # __export __cdecl
2721 // ::= C # __pascal
2722 // ::= D # __export __pascal
2723 // ::= E # __thiscall
2724 // ::= F # __export __thiscall
2725 // ::= G # __stdcall
2726 // ::= H # __export __stdcall
2727 // ::= I # __fastcall
2728 // ::= J # __export __fastcall
2729 // ::= Q # __vectorcall
2730 // ::= S # __attribute__((__swiftcall__)) // Clang-only
2731 // ::= w # __regcall
2732 // The 'export' calling conventions are from a bygone era
2733 // (*cough*Win16*cough*) when functions were declared for export with
2734 // that keyword. (It didn't actually export them, it just made them so
2735 // that they could be in a DLL and somebody from another module could call
2736 // them.)
2737
2738 switch (CC) {
2739 default:
2740 llvm_unreachable("Unsupported CC for mangling")::llvm::llvm_unreachable_internal("Unsupported CC for mangling"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2740)
;
2741 case CC_Win64:
2742 case CC_X86_64SysV:
2743 case CC_C: Out << 'A'; break;
2744 case CC_X86Pascal: Out << 'C'; break;
2745 case CC_X86ThisCall: Out << 'E'; break;
2746 case CC_X86StdCall: Out << 'G'; break;
2747 case CC_X86FastCall: Out << 'I'; break;
2748 case CC_X86VectorCall: Out << 'Q'; break;
2749 case CC_Swift: Out << 'S'; break;
2750 case CC_PreserveMost: Out << 'U'; break;
2751 case CC_X86RegCall: Out << 'w'; break;
2752 }
2753}
2754void MicrosoftCXXNameMangler::mangleCallingConvention(const FunctionType *T) {
2755 mangleCallingConvention(T->getCallConv());
2756}
2757
2758void MicrosoftCXXNameMangler::mangleThrowSpecification(
2759 const FunctionProtoType *FT) {
2760 // <throw-spec> ::= Z # (default)
2761 // ::= _E # noexcept
2762 if (FT->canThrow())
2763 Out << 'Z';
2764 else
2765 Out << "_E";
2766}
2767
2768void MicrosoftCXXNameMangler::mangleType(const UnresolvedUsingType *T,
2769 Qualifiers, SourceRange Range) {
2770 // Probably should be mangled as a template instantiation; need to see what
2771 // VC does first.
2772 DiagnosticsEngine &Diags = Context.getDiags();
2773 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2774 "cannot mangle this unresolved dependent type yet");
2775 Diags.Report(Range.getBegin(), DiagID)
2776 << Range;
2777}
2778
2779// <type> ::= <union-type> | <struct-type> | <class-type> | <enum-type>
2780// <union-type> ::= T <name>
2781// <struct-type> ::= U <name>
2782// <class-type> ::= V <name>
2783// <enum-type> ::= W4 <name>
2784void MicrosoftCXXNameMangler::mangleTagTypeKind(TagTypeKind TTK) {
2785 switch (TTK) {
2786 case TTK_Union:
2787 Out << 'T';
2788 break;
2789 case TTK_Struct:
2790 case TTK_Interface:
2791 Out << 'U';
2792 break;
2793 case TTK_Class:
2794 Out << 'V';
2795 break;
2796 case TTK_Enum:
2797 Out << "W4";
2798 break;
2799 }
2800}
2801void MicrosoftCXXNameMangler::mangleType(const EnumType *T, Qualifiers,
2802 SourceRange) {
2803 mangleType(cast<TagType>(T)->getDecl());
2804}
2805void MicrosoftCXXNameMangler::mangleType(const RecordType *T, Qualifiers,
2806 SourceRange) {
2807 mangleType(cast<TagType>(T)->getDecl());
2808}
2809void MicrosoftCXXNameMangler::mangleType(const TagDecl *TD) {
2810 mangleTagTypeKind(TD->getTagKind());
2811 mangleName(TD);
2812}
2813
2814// If you add a call to this, consider updating isArtificialTagType() too.
2815void MicrosoftCXXNameMangler::mangleArtificialTagType(
2816 TagTypeKind TK, StringRef UnqualifiedName,
2817 ArrayRef<StringRef> NestedNames) {
2818 // <name> ::= <unscoped-name> {[<named-scope>]+ | [<nested-name>]}? @
2819 mangleTagTypeKind(TK);
2820
2821 // Always start with the unqualified name.
2822 mangleSourceName(UnqualifiedName);
2823
2824 for (auto I = NestedNames.rbegin(), E = NestedNames.rend(); I != E; ++I)
2825 mangleSourceName(*I);
2826
2827 // Terminate the whole name with an '@'.
2828 Out << '@';
2829}
2830
2831// <type> ::= <array-type>
2832// <array-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers>
2833// [Y <dimension-count> <dimension>+]
2834// <element-type> # as global, E is never required
2835// It's supposed to be the other way around, but for some strange reason, it
2836// isn't. Today this behavior is retained for the sole purpose of backwards
2837// compatibility.
2838void MicrosoftCXXNameMangler::mangleDecayedArrayType(const ArrayType *T) {
2839 // This isn't a recursive mangling, so now we have to do it all in this
2840 // one call.
2841 manglePointerCVQualifiers(T->getElementType().getQualifiers());
2842 mangleType(T->getElementType(), SourceRange());
2843}
2844void MicrosoftCXXNameMangler::mangleType(const ConstantArrayType *T, Qualifiers,
2845 SourceRange) {
2846 llvm_unreachable("Should have been special cased")::llvm::llvm_unreachable_internal("Should have been special cased"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2846)
;
2847}
2848void MicrosoftCXXNameMangler::mangleType(const VariableArrayType *T, Qualifiers,
2849 SourceRange) {
2850 llvm_unreachable("Should have been special cased")::llvm::llvm_unreachable_internal("Should have been special cased"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2850)
;
2851}
2852void MicrosoftCXXNameMangler::mangleType(const DependentSizedArrayType *T,
2853 Qualifiers, SourceRange) {
2854 llvm_unreachable("Should have been special cased")::llvm::llvm_unreachable_internal("Should have been special cased"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2854)
;
2855}
2856void MicrosoftCXXNameMangler::mangleType(const IncompleteArrayType *T,
2857 Qualifiers, SourceRange) {
2858 llvm_unreachable("Should have been special cased")::llvm::llvm_unreachable_internal("Should have been special cased"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2858)
;
2859}
2860void MicrosoftCXXNameMangler::mangleArrayType(const ArrayType *T) {
2861 QualType ElementTy(T, 0);
2862 SmallVector<llvm::APInt, 3> Dimensions;
2863 for (;;) {
2864 if (ElementTy->isConstantArrayType()) {
2865 const ConstantArrayType *CAT =
2866 getASTContext().getAsConstantArrayType(ElementTy);
2867 Dimensions.push_back(CAT->getSize());
2868 ElementTy = CAT->getElementType();
2869 } else if (ElementTy->isIncompleteArrayType()) {
2870 const IncompleteArrayType *IAT =
2871 getASTContext().getAsIncompleteArrayType(ElementTy);
2872 Dimensions.push_back(llvm::APInt(32, 0));
2873 ElementTy = IAT->getElementType();
2874 } else if (ElementTy->isVariableArrayType()) {
2875 const VariableArrayType *VAT =
2876 getASTContext().getAsVariableArrayType(ElementTy);
2877 Dimensions.push_back(llvm::APInt(32, 0));
2878 ElementTy = VAT->getElementType();
2879 } else if (ElementTy->isDependentSizedArrayType()) {
2880 // The dependent expression has to be folded into a constant (TODO).
2881 const DependentSizedArrayType *DSAT =
2882 getASTContext().getAsDependentSizedArrayType(ElementTy);
2883 DiagnosticsEngine &Diags = Context.getDiags();
2884 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2885 "cannot mangle this dependent-length array yet");
2886 Diags.Report(DSAT->getSizeExpr()->getExprLoc(), DiagID)
2887 << DSAT->getBracketsRange();
2888 return;
2889 } else {
2890 break;
2891 }
2892 }
2893 Out << 'Y';
2894 // <dimension-count> ::= <number> # number of extra dimensions
2895 mangleNumber(Dimensions.size());
2896 for (const llvm::APInt &Dimension : Dimensions)
2897 mangleNumber(Dimension.getLimitedValue());
2898 mangleType(ElementTy, SourceRange(), QMM_Escape);
2899}
2900
2901// <type> ::= <pointer-to-member-type>
2902// <pointer-to-member-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers>
2903// <class name> <type>
2904void MicrosoftCXXNameMangler::mangleType(const MemberPointerType *T,
2905 Qualifiers Quals, SourceRange Range) {
2906 QualType PointeeType = T->getPointeeType();
2907 manglePointerCVQualifiers(Quals);
2908 manglePointerExtQualifiers(Quals, PointeeType);
2909 if (const FunctionProtoType *FPT = PointeeType->getAs<FunctionProtoType>()) {
2910 Out << '8';
2911 mangleName(T->getClass()->castAs<RecordType>()->getDecl());
2912 mangleFunctionType(FPT, nullptr, true);
2913 } else {
2914 mangleQualifiers(PointeeType.getQualifiers(), true);
2915 mangleName(T->getClass()->castAs<RecordType>()->getDecl());
2916 mangleType(PointeeType, Range, QMM_Drop);
2917 }
2918}
2919
2920void MicrosoftCXXNameMangler::mangleType(const TemplateTypeParmType *T,
2921 Qualifiers, SourceRange Range) {
2922 DiagnosticsEngine &Diags = Context.getDiags();
2923 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2924 "cannot mangle this template type parameter type yet");
2925 Diags.Report(Range.getBegin(), DiagID)
2926 << Range;
2927}
2928
2929void MicrosoftCXXNameMangler::mangleType(const SubstTemplateTypeParmPackType *T,
2930 Qualifiers, SourceRange Range) {
2931 DiagnosticsEngine &Diags = Context.getDiags();
2932 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
2933 "cannot mangle this substituted parameter pack yet");
2934 Diags.Report(Range.getBegin(), DiagID)
2935 << Range;
2936}
2937
2938// <type> ::= <pointer-type>
2939// <pointer-type> ::= E? <pointer-cvr-qualifiers> <cvr-qualifiers> <type>
2940// # the E is required for 64-bit non-static pointers
2941void MicrosoftCXXNameMangler::mangleType(const PointerType *T, Qualifiers Quals,
2942 SourceRange Range) {
2943 QualType PointeeType = T->getPointeeType();
2944 manglePointerCVQualifiers(Quals);
2945 manglePointerExtQualifiers(Quals, PointeeType);
2946
2947 // For pointer size address spaces, go down the same type mangling path as
2948 // non address space types.
2949 LangAS AddrSpace = PointeeType.getQualifiers().getAddressSpace();
2950 if (isPtrSizeAddressSpace(AddrSpace) || AddrSpace == LangAS::Default)
2951 mangleType(PointeeType, Range);
2952 else
2953 mangleAddressSpaceType(PointeeType, PointeeType.getQualifiers(), Range);
2954}
2955
2956void MicrosoftCXXNameMangler::mangleType(const ObjCObjectPointerType *T,
2957 Qualifiers Quals, SourceRange Range) {
2958 QualType PointeeType = T->getPointeeType();
2959 switch (Quals.getObjCLifetime()) {
2960 case Qualifiers::OCL_None:
2961 case Qualifiers::OCL_ExplicitNone:
2962 break;
2963 case Qualifiers::OCL_Autoreleasing:
2964 case Qualifiers::OCL_Strong:
2965 case Qualifiers::OCL_Weak:
2966 return mangleObjCLifetime(PointeeType, Quals, Range);
2967 }
2968 manglePointerCVQualifiers(Quals);
2969 manglePointerExtQualifiers(Quals, PointeeType);
2970 mangleType(PointeeType, Range);
2971}
2972
2973// <type> ::= <reference-type>
2974// <reference-type> ::= A E? <cvr-qualifiers> <type>
2975// # the E is required for 64-bit non-static lvalue references
2976void MicrosoftCXXNameMangler::mangleType(const LValueReferenceType *T,
2977 Qualifiers Quals, SourceRange Range) {
2978 QualType PointeeType = T->getPointeeType();
2979 assert(!Quals.hasConst() && !Quals.hasVolatile() && "unexpected qualifier!")(static_cast <bool> (!Quals.hasConst() && !Quals
.hasVolatile() && "unexpected qualifier!") ? void (0)
: __assert_fail ("!Quals.hasConst() && !Quals.hasVolatile() && \"unexpected qualifier!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2979, __extension__ __PRETTY_FUNCTION__))
;
2980 Out << 'A';
2981 manglePointerExtQualifiers(Quals, PointeeType);
2982 mangleType(PointeeType, Range);
2983}
2984
2985// <type> ::= <r-value-reference-type>
2986// <r-value-reference-type> ::= $$Q E? <cvr-qualifiers> <type>
2987// # the E is required for 64-bit non-static rvalue references
2988void MicrosoftCXXNameMangler::mangleType(const RValueReferenceType *T,
2989 Qualifiers Quals, SourceRange Range) {
2990 QualType PointeeType = T->getPointeeType();
2991 assert(!Quals.hasConst() && !Quals.hasVolatile() && "unexpected qualifier!")(static_cast <bool> (!Quals.hasConst() && !Quals
.hasVolatile() && "unexpected qualifier!") ? void (0)
: __assert_fail ("!Quals.hasConst() && !Quals.hasVolatile() && \"unexpected qualifier!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 2991, __extension__ __PRETTY_FUNCTION__))
;
2992 Out << "$$Q";
2993 manglePointerExtQualifiers(Quals, PointeeType);
2994 mangleType(PointeeType, Range);
2995}
2996
2997void MicrosoftCXXNameMangler::mangleType(const ComplexType *T, Qualifiers,
2998 SourceRange Range) {
2999 QualType ElementType = T->getElementType();
3000
3001 llvm::SmallString<64> TemplateMangling;
3002 llvm::raw_svector_ostream Stream(TemplateMangling);
3003 MicrosoftCXXNameMangler Extra(Context, Stream);
3004 Stream << "?$";
3005 Extra.mangleSourceName("_Complex");
3006 Extra.mangleType(ElementType, Range, QMM_Escape);
3007
3008 mangleArtificialTagType(TTK_Struct, TemplateMangling, {"__clang"});
3009}
3010
3011// Returns true for types that mangleArtificialTagType() gets called for with
3012// TTK_Union, TTK_Struct, TTK_Class and where compatibility with MSVC's
3013// mangling matters.
3014// (It doesn't matter for Objective-C types and the like that cl.exe doesn't
3015// support.)
3016bool MicrosoftCXXNameMangler::isArtificialTagType(QualType T) const {
3017 const Type *ty = T.getTypePtr();
3018 switch (ty->getTypeClass()) {
3019 default:
3020 return false;
3021
3022 case Type::Vector: {
3023 // For ABI compatibility only __m64, __m128(id), and __m256(id) matter,
3024 // but since mangleType(VectorType*) always calls mangleArtificialTagType()
3025 // just always return true (the other vector types are clang-only).
3026 return true;
3027 }
3028 }
3029}
3030
3031void MicrosoftCXXNameMangler::mangleType(const VectorType *T, Qualifiers Quals,
3032 SourceRange Range) {
3033 const BuiltinType *ET = T->getElementType()->getAs<BuiltinType>();
3034 assert(ET && "vectors with non-builtin elements are unsupported")(static_cast <bool> (ET && "vectors with non-builtin elements are unsupported"
) ? void (0) : __assert_fail ("ET && \"vectors with non-builtin elements are unsupported\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 3034, __extension__ __PRETTY_FUNCTION__))
;
3035 uint64_t Width = getASTContext().getTypeSize(T);
3036 // Pattern match exactly the typedefs in our intrinsic headers. Anything that
3037 // doesn't match the Intel types uses a custom mangling below.
3038 size_t OutSizeBefore = Out.tell();
3039 if (!isa<ExtVectorType>(T)) {
3040 if (getASTContext().getTargetInfo().getTriple().isX86()) {
3041 if (Width == 64 && ET->getKind() == BuiltinType::LongLong) {
3042 mangleArtificialTagType(TTK_Union, "__m64");
3043 } else if (Width >= 128) {
3044 if (ET->getKind() == BuiltinType::Float)
3045 mangleArtificialTagType(TTK_Union, "__m" + llvm::utostr(Width));
3046 else if (ET->getKind() == BuiltinType::LongLong)
3047 mangleArtificialTagType(TTK_Union, "__m" + llvm::utostr(Width) + 'i');
3048 else if (ET->getKind() == BuiltinType::Double)
3049 mangleArtificialTagType(TTK_Struct, "__m" + llvm::utostr(Width) + 'd');
3050 }
3051 }
3052 }
3053
3054 bool IsBuiltin = Out.tell() != OutSizeBefore;
3055 if (!IsBuiltin) {
3056 // The MS ABI doesn't have a special mangling for vector types, so we define
3057 // our own mangling to handle uses of __vector_size__ on user-specified
3058 // types, and for extensions like __v4sf.
3059
3060 llvm::SmallString<64> TemplateMangling;
3061 llvm::raw_svector_ostream Stream(TemplateMangling);
3062 MicrosoftCXXNameMangler Extra(Context, Stream);
3063 Stream << "?$";
3064 Extra.mangleSourceName("__vector");
3065 Extra.mangleType(QualType(ET, 0), Range, QMM_Escape);
3066 Extra.mangleIntegerLiteral(llvm::APSInt::getUnsigned(T->getNumElements()));
3067
3068 mangleArtificialTagType(TTK_Union, TemplateMangling, {"__clang"});
3069 }
3070}
3071
3072void MicrosoftCXXNameMangler::mangleType(const ExtVectorType *T,
3073 Qualifiers Quals, SourceRange Range) {
3074 mangleType(static_cast<const VectorType *>(T), Quals, Range);
3075}
3076
3077void MicrosoftCXXNameMangler::mangleType(const DependentVectorType *T,
3078 Qualifiers, SourceRange Range) {
3079 DiagnosticsEngine &Diags = Context.getDiags();
3080 unsigned DiagID = Diags.getCustomDiagID(
3081 DiagnosticsEngine::Error,
3082 "cannot mangle this dependent-sized vector type yet");
3083 Diags.Report(Range.getBegin(), DiagID) << Range;
3084}
3085
3086void MicrosoftCXXNameMangler::mangleType(const DependentSizedExtVectorType *T,
3087 Qualifiers, SourceRange Range) {
3088 DiagnosticsEngine &Diags = Context.getDiags();
3089 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
3090 "cannot mangle this dependent-sized extended vector type yet");
3091 Diags.Report(Range.getBegin(), DiagID)
3092 << Range;
3093}
3094
3095void MicrosoftCXXNameMangler::mangleType(const ConstantMatrixType *T,
3096 Qualifiers quals, SourceRange Range) {
3097 DiagnosticsEngine &Diags = Context.getDiags();
3098 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
3099 "Cannot mangle this matrix type yet");
3100 Diags.Report(Range.getBegin(), DiagID) << Range;
3101}
3102
3103void MicrosoftCXXNameMangler::mangleType(const DependentSizedMatrixType *T,
3104 Qualifiers quals, SourceRange Range) {
3105 DiagnosticsEngine &Diags = Context.getDiags();
3106 unsigned DiagID = Diags.getCustomDiagID(
3107 DiagnosticsEngine::Error,
3108 "Cannot mangle this dependent-sized matrix type yet");
3109 Diags.Report(Range.getBegin(), DiagID) << Range;
3110}
3111
3112void MicrosoftCXXNameMangler::mangleType(const DependentAddressSpaceType *T,
3113 Qualifiers, SourceRange Range) {
3114 DiagnosticsEngine &Diags = Context.getDiags();
3115 unsigned DiagID = Diags.getCustomDiagID(
3116 DiagnosticsEngine::Error,
3117 "cannot mangle this dependent address space type yet");
3118 Diags.Report(Range.getBegin(), DiagID) << Range;
3119}
3120
3121void MicrosoftCXXNameMangler::mangleType(const ObjCInterfaceType *T, Qualifiers,
3122 SourceRange) {
3123 // ObjC interfaces have structs underlying them.
3124 mangleTagTypeKind(TTK_Struct);
3125 mangleName(T->getDecl());
3126}
3127
3128void MicrosoftCXXNameMangler::mangleType(const ObjCObjectType *T,
3129 Qualifiers Quals, SourceRange Range) {
3130 if (T->isKindOfType())
1
Assuming the condition is true
2
Taking true branch
7
Called C++ object pointer is null
3131 return mangleObjCKindOfType(T, Quals, Range);
3
Calling 'MicrosoftCXXNameMangler::mangleObjCKindOfType'
3132
3133 if (T->qual_empty() && !T->isSpecialized())
3134 return mangleType(T->getBaseType(), Range, QMM_Drop);
3135
3136 ArgBackRefMap OuterFunArgsContext;
3137 ArgBackRefMap OuterTemplateArgsContext;
3138 BackRefVec OuterTemplateContext;
3139
3140 FunArgBackReferences.swap(OuterFunArgsContext);
3141 TemplateArgBackReferences.swap(OuterTemplateArgsContext);
3142 NameBackReferences.swap(OuterTemplateContext);
3143
3144 mangleTagTypeKind(TTK_Struct);
3145
3146 Out << "?$";
3147 if (T->isObjCId())
3148 mangleSourceName("objc_object");
3149 else if (T->isObjCClass())
3150 mangleSourceName("objc_class");
3151 else
3152 mangleSourceName(T->getInterface()->getName());
3153
3154 for (const auto &Q : T->quals())
3155 mangleObjCProtocol(Q);
3156
3157 if (T->isSpecialized())
3158 for (const auto &TA : T->getTypeArgs())
3159 mangleType(TA, Range, QMM_Drop);
3160
3161 Out << '@';
3162
3163 Out << '@';
3164
3165 FunArgBackReferences.swap(OuterFunArgsContext);
3166 TemplateArgBackReferences.swap(OuterTemplateArgsContext);
3167 NameBackReferences.swap(OuterTemplateContext);
3168}
3169
3170void MicrosoftCXXNameMangler::mangleType(const BlockPointerType *T,
3171 Qualifiers Quals, SourceRange Range) {
3172 QualType PointeeType = T->getPointeeType();
3173 manglePointerCVQualifiers(Quals);
3174 manglePointerExtQualifiers(Quals, PointeeType);
3175
3176 Out << "_E";
3177
3178 mangleFunctionType(PointeeType->castAs<FunctionProtoType>());
3179}
3180
3181void MicrosoftCXXNameMangler::mangleType(const InjectedClassNameType *,
3182 Qualifiers, SourceRange) {
3183 llvm_unreachable("Cannot mangle injected class name type.")::llvm::llvm_unreachable_internal("Cannot mangle injected class name type."
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 3183)
;
3184}
3185
3186void MicrosoftCXXNameMangler::mangleType(const TemplateSpecializationType *T,
3187 Qualifiers, SourceRange Range) {
3188 DiagnosticsEngine &Diags = Context.getDiags();
3189 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
3190 "cannot mangle this template specialization type yet");
3191 Diags.Report(Range.getBegin(), DiagID)
3192 << Range;
3193}
3194
3195void MicrosoftCXXNameMangler::mangleType(const DependentNameType *T, Qualifiers,
3196 SourceRange Range) {
3197 DiagnosticsEngine &Diags = Context.getDiags();
3198 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
3199 "cannot mangle this dependent name type yet");
3200 Diags.Report(Range.getBegin(), DiagID)
3201 << Range;
3202}
3203
3204void MicrosoftCXXNameMangler::mangleType(
3205 const DependentTemplateSpecializationType *T, Qualifiers,
3206 SourceRange Range) {
3207 DiagnosticsEngine &Diags = Context.getDiags();
3208 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
3209 "cannot mangle this dependent template specialization type yet");
3210 Diags.Report(Range.getBegin(), DiagID)
3211 << Range;
3212}
3213
3214void MicrosoftCXXNameMangler::mangleType(const PackExpansionType *T, Qualifiers,
3215 SourceRange Range) {
3216 DiagnosticsEngine &Diags = Context.getDiags();
3217 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
3218 "cannot mangle this pack expansion yet");
3219 Diags.Report(Range.getBegin(), DiagID)
3220 << Range;
3221}
3222
3223void MicrosoftCXXNameMangler::mangleType(const TypeOfType *T, Qualifiers,
3224 SourceRange Range) {
3225 DiagnosticsEngine &Diags = Context.getDiags();
3226 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
3227 "cannot mangle this typeof(type) yet");
3228 Diags.Report(Range.getBegin(), DiagID)
3229 << Range;
3230}
3231
3232void MicrosoftCXXNameMangler::mangleType(const TypeOfExprType *T, Qualifiers,
3233 SourceRange Range) {
3234 DiagnosticsEngine &Diags = Context.getDiags();
3235 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
3236 "cannot mangle this typeof(expression) yet");
3237 Diags.Report(Range.getBegin(), DiagID)
3238 << Range;
3239}
3240
3241void MicrosoftCXXNameMangler::mangleType(const DecltypeType *T, Qualifiers,
3242 SourceRange Range) {
3243 DiagnosticsEngine &Diags = Context.getDiags();
3244 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
3245 "cannot mangle this decltype() yet");
3246 Diags.Report(Range.getBegin(), DiagID)
3247 << Range;
3248}
3249
3250void MicrosoftCXXNameMangler::mangleType(const UnaryTransformType *T,
3251 Qualifiers, SourceRange Range) {
3252 DiagnosticsEngine &Diags = Context.getDiags();
3253 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
3254 "cannot mangle this unary transform type yet");
3255 Diags.Report(Range.getBegin(), DiagID)
3256 << Range;
3257}
3258
3259void MicrosoftCXXNameMangler::mangleType(const AutoType *T, Qualifiers,
3260 SourceRange Range) {
3261 assert(T->getDeducedType().isNull() && "expecting a dependent type!")(static_cast <bool> (T->getDeducedType().isNull() &&
"expecting a dependent type!") ? void (0) : __assert_fail ("T->getDeducedType().isNull() && \"expecting a dependent type!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 3261, __extension__ __PRETTY_FUNCTION__))
;
3262
3263 DiagnosticsEngine &Diags = Context.getDiags();
3264 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
3265 "cannot mangle this 'auto' type yet");
3266 Diags.Report(Range.getBegin(), DiagID)
3267 << Range;
3268}
3269
3270void MicrosoftCXXNameMangler::mangleType(
3271 const DeducedTemplateSpecializationType *T, Qualifiers, SourceRange Range) {
3272 assert(T->getDeducedType().isNull() && "expecting a dependent type!")(static_cast <bool> (T->getDeducedType().isNull() &&
"expecting a dependent type!") ? void (0) : __assert_fail ("T->getDeducedType().isNull() && \"expecting a dependent type!\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 3272, __extension__ __PRETTY_FUNCTION__))
;
3273
3274 DiagnosticsEngine &Diags = Context.getDiags();
3275 unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
3276 "cannot mangle this deduced class template specialization type yet");
3277 Diags.Report(Range.getBegin(), DiagID)
3278 << Range;
3279}
3280
3281void MicrosoftCXXNameMangler::mangleType(const AtomicType *T, Qualifiers,
3282 SourceRange Range) {
3283 QualType ValueType = T->getValueType();
3284
3285 llvm::SmallString<64> TemplateMangling;
3286 llvm::raw_svector_ostream Stream(TemplateMangling);
3287 MicrosoftCXXNameMangler Extra(Context, Stream);
3288 Stream << "?$";
3289 Extra.mangleSourceName("_Atomic");
3290 Extra.mangleType(ValueType, Range, QMM_Escape);
3291
3292 mangleArtificialTagType(TTK_Struct, TemplateMangling, {"__clang"});
3293}
3294
3295void MicrosoftCXXNameMangler::mangleType(const PipeType *T, Qualifiers,
3296 SourceRange Range) {
3297 QualType ElementType = T->getElementType();
3298
3299 llvm::SmallString<64> TemplateMangling;
3300 llvm::raw_svector_ostream Stream(TemplateMangling);
3301 MicrosoftCXXNameMangler Extra(Context, Stream);
3302 Stream << "?$";
3303 Extra.mangleSourceName("ocl_pipe");
3304 Extra.mangleType(ElementType, Range, QMM_Escape);
3305 Extra.mangleIntegerLiteral(llvm::APSInt::get(T->isReadOnly()));
3306
3307 mangleArtificialTagType(TTK_Struct, TemplateMangling, {"__clang"});
3308}
3309
3310void MicrosoftMangleContextImpl::mangleCXXName(GlobalDecl GD,
3311 raw_ostream &Out) {
3312 const NamedDecl *D = cast<NamedDecl>(GD.getDecl());
3313 PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
3314 getASTContext().getSourceManager(),
3315 "Mangling declaration");
3316
3317 msvc_hashing_ostream MHO(Out);
3318
3319 if (auto *CD = dyn_cast<CXXConstructorDecl>(D)) {
3320 auto Type = GD.getCtorType();
3321 MicrosoftCXXNameMangler mangler(*this, MHO, CD, Type);
3322 return mangler.mangle(D);
3323 }
3324
3325 if (auto *DD = dyn_cast<CXXDestructorDecl>(D)) {
3326 auto Type = GD.getDtorType();
3327 MicrosoftCXXNameMangler mangler(*this, MHO, DD, Type);
3328 return mangler.mangle(D);
3329 }
3330
3331 MicrosoftCXXNameMangler Mangler(*this, MHO);
3332 return Mangler.mangle(D);
3333}
3334
3335void MicrosoftCXXNameMangler::mangleType(const ExtIntType *T, Qualifiers,
3336 SourceRange Range) {
3337 llvm::SmallString<64> TemplateMangling;
3338 llvm::raw_svector_ostream Stream(TemplateMangling);
3339 MicrosoftCXXNameMangler Extra(Context, Stream);
3340 Stream << "?$";
3341 if (T->isUnsigned())
3342 Extra.mangleSourceName("_UExtInt");
3343 else
3344 Extra.mangleSourceName("_ExtInt");
3345 Extra.mangleIntegerLiteral(llvm::APSInt::getUnsigned(T->getNumBits()));
3346
3347 mangleArtificialTagType(TTK_Struct, TemplateMangling, {"__clang"});
3348}
3349
3350void MicrosoftCXXNameMangler::mangleType(const DependentExtIntType *T,
3351 Qualifiers, SourceRange Range) {
3352 DiagnosticsEngine &Diags = Context.getDiags();
3353 unsigned DiagID = Diags.getCustomDiagID(
3354 DiagnosticsEngine::Error, "cannot mangle this DependentExtInt type yet");
3355 Diags.Report(Range.getBegin(), DiagID) << Range;
3356}
3357
3358// <this-adjustment> ::= <no-adjustment> | <static-adjustment> |
3359// <virtual-adjustment>
3360// <no-adjustment> ::= A # private near
3361// ::= B # private far
3362// ::= I # protected near
3363// ::= J # protected far
3364// ::= Q # public near
3365// ::= R # public far
3366// <static-adjustment> ::= G <static-offset> # private near
3367// ::= H <static-offset> # private far
3368// ::= O <static-offset> # protected near
3369// ::= P <static-offset> # protected far
3370// ::= W <static-offset> # public near
3371// ::= X <static-offset> # public far
3372// <virtual-adjustment> ::= $0 <virtual-shift> <static-offset> # private near
3373// ::= $1 <virtual-shift> <static-offset> # private far
3374// ::= $2 <virtual-shift> <static-offset> # protected near
3375// ::= $3 <virtual-shift> <static-offset> # protected far
3376// ::= $4 <virtual-shift> <static-offset> # public near
3377// ::= $5 <virtual-shift> <static-offset> # public far
3378// <virtual-shift> ::= <vtordisp-shift> | <vtordispex-shift>
3379// <vtordisp-shift> ::= <offset-to-vtordisp>
3380// <vtordispex-shift> ::= <offset-to-vbptr> <vbase-offset-offset>
3381// <offset-to-vtordisp>
3382static void mangleThunkThisAdjustment(AccessSpecifier AS,
3383 const ThisAdjustment &Adjustment,
3384 MicrosoftCXXNameMangler &Mangler,
3385 raw_ostream &Out) {
3386 if (!Adjustment.Virtual.isEmpty()) {
3387 Out << '$';
3388 char AccessSpec;
3389 switch (AS) {
3390 case AS_none:
3391 llvm_unreachable("Unsupported access specifier")::llvm::llvm_unreachable_internal("Unsupported access specifier"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 3391)
;
3392 case AS_private:
3393 AccessSpec = '0';
3394 break;
3395 case AS_protected:
3396 AccessSpec = '2';
3397 break;
3398 case AS_public:
3399 AccessSpec = '4';
3400 }
3401 if (Adjustment.Virtual.Microsoft.VBPtrOffset) {
3402 Out << 'R' << AccessSpec;
3403 Mangler.mangleNumber(
3404 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VBPtrOffset));
3405 Mangler.mangleNumber(
3406 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VBOffsetOffset));
3407 Mangler.mangleNumber(
3408 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VtordispOffset));
3409 Mangler.mangleNumber(static_cast<uint32_t>(Adjustment.NonVirtual));
3410 } else {
3411 Out << AccessSpec;
3412 Mangler.mangleNumber(
3413 static_cast<uint32_t>(Adjustment.Virtual.Microsoft.VtordispOffset));
3414 Mangler.mangleNumber(-static_cast<uint32_t>(Adjustment.NonVirtual));
3415 }
3416 } else if (Adjustment.NonVirtual != 0) {
3417 switch (AS) {
3418 case AS_none:
3419 llvm_unreachable("Unsupported access specifier")::llvm::llvm_unreachable_internal("Unsupported access specifier"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 3419)
;
3420 case AS_private:
3421 Out << 'G';
3422 break;
3423 case AS_protected:
3424 Out << 'O';
3425 break;
3426 case AS_public:
3427 Out << 'W';
3428 }
3429 Mangler.mangleNumber(-static_cast<uint32_t>(Adjustment.NonVirtual));
3430 } else {
3431 switch (AS) {
3432 case AS_none:
3433 llvm_unreachable("Unsupported access specifier")::llvm::llvm_unreachable_internal("Unsupported access specifier"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 3433)
;
3434 case AS_private:
3435 Out << 'A';
3436 break;
3437 case AS_protected:
3438 Out << 'I';
3439 break;
3440 case AS_public:
3441 Out << 'Q';
3442 }
3443 }
3444}
3445
3446void MicrosoftMangleContextImpl::mangleVirtualMemPtrThunk(
3447 const CXXMethodDecl *MD, const MethodVFTableLocation &ML,
3448 raw_ostream &Out) {
3449 msvc_hashing_ostream MHO(Out);
3450 MicrosoftCXXNameMangler Mangler(*this, MHO);
3451 Mangler.getStream() << '?';
3452 Mangler.mangleVirtualMemPtrThunk(MD, ML);
3453}
3454
3455void MicrosoftMangleContextImpl::mangleThunk(const CXXMethodDecl *MD,
3456 const ThunkInfo &Thunk,
3457 raw_ostream &Out) {
3458 msvc_hashing_ostream MHO(Out);
3459 MicrosoftCXXNameMangler Mangler(*this, MHO);
3460 Mangler.getStream() << '?';
3461 Mangler.mangleName(MD);
3462
3463 // Usually the thunk uses the access specifier of the new method, but if this
3464 // is a covariant return thunk, then MSVC always uses the public access
3465 // specifier, and we do the same.
3466 AccessSpecifier AS = Thunk.Return.isEmpty() ? MD->getAccess() : AS_public;
3467 mangleThunkThisAdjustment(AS, Thunk.This, Mangler, MHO);
3468
3469 if (!Thunk.Return.isEmpty())
3470 assert(Thunk.Method != nullptr &&(static_cast <bool> (Thunk.Method != nullptr &&
"Thunk info should hold the overridee decl") ? void (0) : __assert_fail
("Thunk.Method != nullptr && \"Thunk info should hold the overridee decl\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 3471, __extension__ __PRETTY_FUNCTION__))
3471 "Thunk info should hold the overridee decl")(static_cast <bool> (Thunk.Method != nullptr &&
"Thunk info should hold the overridee decl") ? void (0) : __assert_fail
("Thunk.Method != nullptr && \"Thunk info should hold the overridee decl\""
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 3471, __extension__ __PRETTY_FUNCTION__))
;
3472
3473 const CXXMethodDecl *DeclForFPT = Thunk.Method ? Thunk.Method : MD;
3474 Mangler.mangleFunctionType(
3475 DeclForFPT->getType()->castAs<FunctionProtoType>(), MD);
3476}
3477
3478void MicrosoftMangleContextImpl::mangleCXXDtorThunk(
3479 const CXXDestructorDecl *DD, CXXDtorType Type,
3480 const ThisAdjustment &Adjustment, raw_ostream &Out) {
3481 // FIXME: Actually, the dtor thunk should be emitted for vector deleting
3482 // dtors rather than scalar deleting dtors. Just use the vector deleting dtor
3483 // mangling manually until we support both deleting dtor types.
3484 assert(Type == Dtor_Deleting)(static_cast <bool> (Type == Dtor_Deleting) ? void (0) :
__assert_fail ("Type == Dtor_Deleting", "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 3484, __extension__ __PRETTY_FUNCTION__))
;
3485 msvc_hashing_ostream MHO(Out);
3486 MicrosoftCXXNameMangler Mangler(*this, MHO, DD, Type);
3487 Mangler.getStream() << "??_E";
3488 Mangler.mangleName(DD->getParent());
3489 mangleThunkThisAdjustment(DD->getAccess(), Adjustment, Mangler, MHO);
3490 Mangler.mangleFunctionType(DD->getType()->castAs<FunctionProtoType>(), DD);
3491}
3492
3493void MicrosoftMangleContextImpl::mangleCXXVFTable(
3494 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
3495 raw_ostream &Out) {
3496 // <mangled-name> ::= ?_7 <class-name> <storage-class>
3497 // <cvr-qualifiers> [<name>] @
3498 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
3499 // is always '6' for vftables.
3500 msvc_hashing_ostream MHO(Out);
3501 MicrosoftCXXNameMangler Mangler(*this, MHO);
3502 if (Derived->hasAttr<DLLImportAttr>())
3503 Mangler.getStream() << "??_S";
3504 else
3505 Mangler.getStream() << "??_7";
3506 Mangler.mangleName(Derived);
3507 Mangler.getStream() << "6B"; // '6' for vftable, 'B' for const.
3508 for (const CXXRecordDecl *RD : BasePath)
3509 Mangler.mangleName(RD);
3510 Mangler.getStream() << '@';
3511}
3512
3513void MicrosoftMangleContextImpl::mangleCXXVBTable(
3514 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
3515 raw_ostream &Out) {
3516 // <mangled-name> ::= ?_8 <class-name> <storage-class>
3517 // <cvr-qualifiers> [<name>] @
3518 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
3519 // is always '7' for vbtables.
3520 msvc_hashing_ostream MHO(Out);
3521 MicrosoftCXXNameMangler Mangler(*this, MHO);
3522 Mangler.getStream() << "??_8";
3523 Mangler.mangleName(Derived);
3524 Mangler.getStream() << "7B"; // '7' for vbtable, 'B' for const.
3525 for (const CXXRecordDecl *RD : BasePath)
3526 Mangler.mangleName(RD);
3527 Mangler.getStream() << '@';
3528}
3529
3530void MicrosoftMangleContextImpl::mangleCXXRTTI(QualType T, raw_ostream &Out) {
3531 msvc_hashing_ostream MHO(Out);
3532 MicrosoftCXXNameMangler Mangler(*this, MHO);
3533 Mangler.getStream() << "??_R0";
3534 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
3535 Mangler.getStream() << "@8";
3536}
3537
3538void MicrosoftMangleContextImpl::mangleCXXRTTIName(QualType T,
3539 raw_ostream &Out) {
3540 MicrosoftCXXNameMangler Mangler(*this, Out);
3541 Mangler.getStream() << '.';
3542 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
3543}
3544
3545void MicrosoftMangleContextImpl::mangleCXXVirtualDisplacementMap(
3546 const CXXRecordDecl *SrcRD, const CXXRecordDecl *DstRD, raw_ostream &Out) {
3547 msvc_hashing_ostream MHO(Out);
3548 MicrosoftCXXNameMangler Mangler(*this, MHO);
3549 Mangler.getStream() << "??_K";
3550 Mangler.mangleName(SrcRD);
3551 Mangler.getStream() << "$C";
3552 Mangler.mangleName(DstRD);
3553}
3554
3555void MicrosoftMangleContextImpl::mangleCXXThrowInfo(QualType T, bool IsConst,
3556 bool IsVolatile,
3557 bool IsUnaligned,
3558 uint32_t NumEntries,
3559 raw_ostream &Out) {
3560 msvc_hashing_ostream MHO(Out);
3561 MicrosoftCXXNameMangler Mangler(*this, MHO);
3562 Mangler.getStream() << "_TI";
3563 if (IsConst)
3564 Mangler.getStream() << 'C';
3565 if (IsVolatile)
3566 Mangler.getStream() << 'V';
3567 if (IsUnaligned)
3568 Mangler.getStream() << 'U';
3569 Mangler.getStream() << NumEntries;
3570 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
3571}
3572
3573void MicrosoftMangleContextImpl::mangleCXXCatchableTypeArray(
3574 QualType T, uint32_t NumEntries, raw_ostream &Out) {
3575 msvc_hashing_ostream MHO(Out);
3576 MicrosoftCXXNameMangler Mangler(*this, MHO);
3577 Mangler.getStream() << "_CTA";
3578 Mangler.getStream() << NumEntries;
3579 Mangler.mangleType(T, SourceRange(), MicrosoftCXXNameMangler::QMM_Result);
3580}
3581
3582void MicrosoftMangleContextImpl::mangleCXXCatchableType(
3583 QualType T, const CXXConstructorDecl *CD, CXXCtorType CT, uint32_t Size,
3584 uint32_t NVOffset, int32_t VBPtrOffset, uint32_t VBIndex,
3585 raw_ostream &Out) {
3586 MicrosoftCXXNameMangler Mangler(*this, Out);
3587 Mangler.getStream() << "_CT";
3588
3589 llvm::SmallString<64> RTTIMangling;
3590 {
3591 llvm::raw_svector_ostream Stream(RTTIMangling);
3592 msvc_hashing_ostream MHO(Stream);
3593 mangleCXXRTTI(T, MHO);
3594 }
3595 Mangler.getStream() << RTTIMangling;
3596
3597 // VS2015 and VS2017.1 omit the copy-constructor in the mangled name but
3598 // both older and newer versions include it.
3599 // FIXME: It is known that the Ctor is present in 2013, and in 2017.7
3600 // (_MSC_VER 1914) and newer, and that it's omitted in 2015 and 2017.4
3601 // (_MSC_VER 1911), but it's unknown when exactly it reappeared (1914?
3602 // Or 1912, 1913 aleady?).
3603 bool OmitCopyCtor = getASTContext().getLangOpts().isCompatibleWithMSVC(
3604 LangOptions::MSVC2015) &&
3605 !getASTContext().getLangOpts().isCompatibleWithMSVC(
3606 LangOptions::MSVC2017_7);
3607 llvm::SmallString<64> CopyCtorMangling;
3608 if (!OmitCopyCtor && CD) {
3609 llvm::raw_svector_ostream Stream(CopyCtorMangling);
3610 msvc_hashing_ostream MHO(Stream);
3611 mangleCXXName(GlobalDecl(CD, CT), MHO);
3612 }
3613 Mangler.getStream() << CopyCtorMangling;
3614
3615 Mangler.getStream() << Size;
3616 if (VBPtrOffset == -1) {
3617 if (NVOffset) {
3618 Mangler.getStream() << NVOffset;
3619 }
3620 } else {
3621 Mangler.getStream() << NVOffset;
3622 Mangler.getStream() << VBPtrOffset;
3623 Mangler.getStream() << VBIndex;
3624 }
3625}
3626
3627void MicrosoftMangleContextImpl::mangleCXXRTTIBaseClassDescriptor(
3628 const CXXRecordDecl *Derived, uint32_t NVOffset, int32_t VBPtrOffset,
3629 uint32_t VBTableOffset, uint32_t Flags, raw_ostream &Out) {
3630 msvc_hashing_ostream MHO(Out);
3631 MicrosoftCXXNameMangler Mangler(*this, MHO);
3632 Mangler.getStream() << "??_R1";
3633 Mangler.mangleNumber(NVOffset);
3634 Mangler.mangleNumber(VBPtrOffset);
3635 Mangler.mangleNumber(VBTableOffset);
3636 Mangler.mangleNumber(Flags);
3637 Mangler.mangleName(Derived);
3638 Mangler.getStream() << "8";
3639}
3640
3641void MicrosoftMangleContextImpl::mangleCXXRTTIBaseClassArray(
3642 const CXXRecordDecl *Derived, raw_ostream &Out) {
3643 msvc_hashing_ostream MHO(Out);
3644 MicrosoftCXXNameMangler Mangler(*this, MHO);
3645 Mangler.getStream() << "??_R2";
3646 Mangler.mangleName(Derived);
3647 Mangler.getStream() << "8";
3648}
3649
3650void MicrosoftMangleContextImpl::mangleCXXRTTIClassHierarchyDescriptor(
3651 const CXXRecordDecl *Derived, raw_ostream &Out) {
3652 msvc_hashing_ostream MHO(Out);
3653 MicrosoftCXXNameMangler Mangler(*this, MHO);
3654 Mangler.getStream() << "??_R3";
3655 Mangler.mangleName(Derived);
3656 Mangler.getStream() << "8";
3657}
3658
3659void MicrosoftMangleContextImpl::mangleCXXRTTICompleteObjectLocator(
3660 const CXXRecordDecl *Derived, ArrayRef<const CXXRecordDecl *> BasePath,
3661 raw_ostream &Out) {
3662 // <mangled-name> ::= ?_R4 <class-name> <storage-class>
3663 // <cvr-qualifiers> [<name>] @
3664 // NOTE: <cvr-qualifiers> here is always 'B' (const). <storage-class>
3665 // is always '6' for vftables.
3666 llvm::SmallString<64> VFTableMangling;
3667 llvm::raw_svector_ostream Stream(VFTableMangling);
3668 mangleCXXVFTable(Derived, BasePath, Stream);
3669
3670 if (VFTableMangling.startswith("??@")) {
3671 assert(VFTableMangling.endswith("@"))(static_cast <bool> (VFTableMangling.endswith("@")) ? void
(0) : __assert_fail ("VFTableMangling.endswith(\"@\")", "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 3671, __extension__ __PRETTY_FUNCTION__))
;
3672 Out << VFTableMangling << "??_R4@";
3673 return;
3674 }
3675
3676 assert(VFTableMangling.startswith("??_7") ||(static_cast <bool> (VFTableMangling.startswith("??_7")
|| VFTableMangling.startswith("??_S")) ? void (0) : __assert_fail
("VFTableMangling.startswith(\"??_7\") || VFTableMangling.startswith(\"??_S\")"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 3677, __extension__ __PRETTY_FUNCTION__))
3677 VFTableMangling.startswith("??_S"))(static_cast <bool> (VFTableMangling.startswith("??_7")
|| VFTableMangling.startswith("??_S")) ? void (0) : __assert_fail
("VFTableMangling.startswith(\"??_7\") || VFTableMangling.startswith(\"??_S\")"
, "/build/llvm-toolchain-snapshot-13~++20210621111111+acefe0eaaf82/clang/lib/AST/MicrosoftMangle.cpp"
, 3677, __extension__ __PRETTY_FUNCTION__))
;
3678
3679 Out << "??_R4" << StringRef(VFTableMangling).drop_front(4);
3680}
3681
3682void MicrosoftMangleContextImpl::mangleSEHFilterExpression(
3683 const NamedDecl *EnclosingDecl, raw_ostream &Out) {
3684 msvc_hashing_ostream MHO(Out);
3685 MicrosoftCXXNameMangler Mangler(*this, MHO);
3686 // The function body is in the same comdat as the function with the handler,
3687 // so the numbering here doesn't have to be the same across TUs.
3688 //
3689 // <mangled-name> ::= ?filt$ <filter-number> @0
3690 Mangler.getStream() << "?filt$" << SEHFilterIds[EnclosingDecl]++ << "@0@";
3691 Mangler.mangleName(EnclosingDecl);
3692}
3693
3694void MicrosoftMangleContextImpl::mangleSEHFinallyBlock(
3695 const NamedDecl *EnclosingDecl, raw_ostream &Out) {
3696 msvc_hashing_ostream MHO(Out);
3697 MicrosoftCXXNameMangler Mangler(*this, MHO);
3698 // The function body is in the same comdat as the function with the handler,
3699 // so the numbering here doesn't have to be the same across TUs.
3700 //
3701 // <mangled-name> ::= ?fin$ <filter-number> @0
3702 Mangler.getStream() << "?fin$" << SEHFinallyIds[EnclosingDecl]++ << "@0@";
3703 Mangler.mangleName(EnclosingDecl);
3704}
3705
3706void MicrosoftMangleContextImpl::mangleTypeName(QualType T, raw_ostream &Out) {
3707 // This is just a made up unique string for the purposes of tbaa. undname
3708 // does *not* know how to demangle it.
3709 MicrosoftCXXNameMangler Mangler(*this, Out);
3710 Mangler.getStream() << '?';
3711 Mangler.mangleType(T, SourceRange());
3712}
3713
3714void MicrosoftMangleContextImpl::mangleReferenceTemporary(
3715 const VarDecl *VD, unsigned ManglingNumber, raw_ostream &Out) {
3716 msvc_hashing_ostream MHO(Out);
3717 MicrosoftCXXNameMangler Mangler(*this, MHO);
3718
3719 Mangler.getStream() << "?$RT" << ManglingNumber << '@';
3720 Mangler.mangle(VD, "");
3721}
3722
3723void MicrosoftMangleContextImpl::mangleThreadSafeStaticGuardVariable(
3724 const VarDecl *VD, unsigned GuardNum, raw_ostream &Out) {
3725 msvc_hashing_ostream MHO(Out);
3726 MicrosoftCXXNameMangler Mangler(*this, MHO);
3727
3728 Mangler.getStream() << "?$TSS" << GuardNum << '@';
3729 Mangler.mangleNestedName(VD);
3730 Mangler.getStream() << "@4HA";
3731}
3732
3733void MicrosoftMangleContextImpl::mangleStaticGuardVariable(const VarDecl *VD,
3734 raw_ostream &Out) {
3735 // <guard-name> ::= ?_B <postfix> @5 <scope-depth>
3736 // ::= ?__J <postfix> @5 <scope-depth>
3737 // ::= ?$S <guard-num> @ <postfix> @4IA
3738
3739 // The first mangling is what MSVC uses to guard static locals in inline
3740 // functions. It uses a different mangling in external functions to support
3741 // guarding more than 32 variables. MSVC rejects inline functions with more
3742 // than 32 static locals. We don't fully implement the second mangling
3743 // because those guards are not externally visible, and instead use LLVM's
3744 // default renaming when creating a new guard variable.
3745 msvc_hashing_ostream MHO(Out);
3746 MicrosoftCXXNameMangler Mangler(*this, MHO);
3747
3748 bool Visible = VD->isExternallyVisible();
3749 if (Visible) {
3750 Mangler.getStream() << (VD->getTLSKind() ? "??__J" : "??_B");
3751 } else {
3752 Mangler.getStream() << "?$S1@";
3753 }
3754 unsigned ScopeDepth = 0;
3755 if (Visible && !getNextDiscriminator(VD, ScopeDepth))
3756 // If we do not have a discriminator and are emitting a guard variable for
3757 // use at global scope, then mangling the nested name will not be enough to
3758 // remove ambiguities.
3759 Mangler.mangle(VD, "");
3760 else
3761 Mangler.mangleNestedName(VD);
3762 Mangler.getStream() << (Visible ? "@5" : "@4IA");
3763 if (ScopeDepth)
3764 Mangler.mangleNumber(ScopeDepth);
3765}
3766
3767void MicrosoftMangleContextImpl::mangleInitFiniStub(const VarDecl *D,
3768 char CharCode,
3769 raw_ostream &Out) {
3770 msvc_hashing_ostream MHO(Out);
3771 MicrosoftCXXNameMangler Mangler(*this, MHO);
3772 Mangler.getStream() << "??__" << CharCode;
3773 if (D->isStaticDataMember()) {
3774 Mangler.getStream() << '?';
3775 Mangler.mangleName(D);
3776 Mangler.mangleVariableEncoding(D);
3777 Mangler.getStream() << "@@";
3778 } else {
3779 Mangler.mangleName(D);
3780 }
3781 // This is the function class mangling. These stubs are global, non-variadic,
3782 // cdecl functions that return void and take no args.
3783 Mangler.getStream() << "YAXXZ";
3784}
3785
3786void MicrosoftMangleContextImpl::mangleDynamicInitializer(const VarDecl *D,
3787 raw_ostream &Out) {
3788 // <initializer-name> ::= ?__E <name> YAXXZ
3789 mangleInitFiniStub(D, 'E', Out);
3790}
3791
3792void
3793MicrosoftMangleContextImpl::mangleDynamicAtExitDestructor(const VarDecl *D,
3794 raw_ostream &Out) {
3795 // <destructor-name> ::= ?__F <name> YAXXZ
3796 mangleInitFiniStub(D, 'F', Out);
3797}
3798
3799void MicrosoftMangleContextImpl::mangleStringLiteral(const StringLiteral *SL,
3800 raw_ostream &Out) {
3801 // <char-type> ::= 0 # char, char16_t, char32_t
3802 // # (little endian char data in mangling)
3803 // ::= 1 # wchar_t (big endian char data in mangling)
3804 //
3805 // <literal-length> ::= <non-negative integer> # the length of the literal
3806 //
3807 // <encoded-crc> ::= <hex digit>+ @ # crc of the literal including
3808 // # trailing null bytes
3809 //
3810 // <encoded-string> ::= <simple character> # uninteresting character
3811 // ::= '?$' <hex digit> <hex digit> # these two nibbles
3812 // # encode the byte for the
3813 // # character
3814 // ::= '?' [a-z] # \xe1 - \xfa
3815 // ::= '?' [A-Z] # \xc1 - \xda
3816 // ::= '?' [0-9] # [,/\:. \n\t'-]
3817 //
3818 // <literal> ::= '??_C@_' <char-type> <literal-length> <encoded-crc>
3819 // <encoded-string> '@'
3820 MicrosoftCXXNameMangler Mangler(*this, Out);
3821 Mangler.getStream() << "??_C@_";
3822
3823 // The actual string length might be different from that of the string literal
3824 // in cases like:
3825 // char foo[3] = "foobar";
3826 // char bar[42] = "foobar";
3827 // Where it is truncated or zero-padded to fit the array. This is the length
3828 // used for mangling, and any trailing null-bytes also need to be mangled.
3829 unsigned StringLength = getASTContext()
3830 .getAsConstantArrayType(SL->getType())
3831 ->getSize()
3832 .getZExtValue();
3833 unsigned StringByteLength = StringLength * SL->getCharByteWidth();
3834
3835 // <char-type>: The "kind" of string literal is encoded into the mangled name.
3836 if (SL->isWide())
3837 Mangler.getStream() << '1';
3838 else
3839 Mangler.getStream() << '0';
3840
3841 // <literal-length>: The next part of the mangled name consists of the length
3842 // of the string in bytes.
3843 Mangler.mangleNumber(StringByteLength);
3844
3845 auto GetLittleEndianByte = [&SL](unsigned Index) {
3846 unsigned CharByteWidth = SL->getCharByteWidth();
3847 if (Index / CharByteWidth >= SL->getLength())
3848 return static_cast<char>(0);
3849 uint32_t CodeUnit = SL->getCodeUnit(Index / CharByteWidth);
3850 unsigned OffsetInCodeUnit = Index % CharByteWidth;
3851 return static_cast<char>((CodeUnit >> (8 * OffsetInCodeUnit)) & 0xff);
3852 };
3853
3854 auto GetBigEndianByte = [&SL](unsigned Index) {
3855 unsigned CharByteWidth = SL->getCharByteWidth();
3856 if (Index / CharByteWidth >= SL->getLength())
3857 return static_cast<char>(0);
3858 uint32_t CodeUnit = SL->getCodeUnit(Index / CharByteWidth);
3859 unsigned OffsetInCodeUnit = (CharByteWidth - 1) - (Index % CharByteWidth);
3860 return static_cast<char>((CodeUnit >> (8 * OffsetInCodeUnit)) & 0xff);
3861 };
3862
3863 // CRC all the bytes of the StringLiteral.
3864 llvm::JamCRC JC;
3865 for (unsigned I = 0, E = StringByteLength; I != E; ++I)
3866 JC.update(GetLittleEndianByte(I));
3867
3868 // <encoded-crc>: The CRC is encoded utilizing the standard number mangling
3869 // scheme.
3870 Mangler.mangleNumber(JC.getCRC());
3871
3872 // <encoded-string>: The mangled name also contains the first 32 bytes
3873 // (including null-terminator bytes) of the encoded StringLiteral.
3874 // Each character is encoded by splitting them into bytes and then encoding
3875 // the constituent bytes.
3876 auto MangleByte = [&Mangler](char Byte) {
3877 // There are five different manglings for characters:
3878 // - [a-zA-Z0-9_$]: A one-to-one mapping.
3879 // - ?[a-z]: The range from \xe1 to \xfa.
3880 // - ?[A-Z]: The range from \xc1 to \xda.
3881 // - ?[0-9]: The set of [,/\:. \n\t'-].
3882 // - ?$XX: A fallback which maps nibbles.
3883 if (isIdentifierBody(Byte, /*AllowDollar=*/true)) {
3884 Mangler.getStream() << Byte;
3885 } else if (isLetter(Byte & 0x7f)) {
3886 Mangler.getStream() << '?' << static_cast<char>(Byte & 0x7f);
3887 } else {
3888 const char SpecialChars[] = {',', '/', '\\', ':', '.',
3889 ' ', '\n', '\t', '\'', '-'};
3890 const char *Pos = llvm::find(SpecialChars, Byte);
3891 if (Pos != std::end(SpecialChars)) {
3892 Mangler.getStream() << '?' << (Pos - std::begin(SpecialChars));
3893 } else {
3894 Mangler.getStream() << "?$";
3895 Mangler.getStream() << static_cast<char>('A' + ((Byte >> 4) & 0xf));
3896 Mangler.getStream() << static_cast<char>('A' + (Byte & 0xf));
3897 }
3898 }
3899 };
3900
3901 // Enforce our 32 bytes max, except wchar_t which gets 32 chars instead.
3902 unsigned MaxBytesToMangle = SL->isWide() ? 64U : 32U;
3903 unsigned NumBytesToMangle = std::min(MaxBytesToMangle, StringByteLength);
3904 for (unsigned I = 0; I != NumBytesToMangle; ++I) {
3905 if (SL->isWide())
3906 MangleByte(GetBigEndianByte(I));
3907 else
3908 MangleByte(GetLittleEndianByte(I));
3909 }
3910
3911 Mangler.getStream() << '@';
3912}
3913
3914MicrosoftMangleContext *
3915MicrosoftMangleContext::create(ASTContext &Context, DiagnosticsEngine &Diags) {
3916 return new MicrosoftMangleContextImpl(Context, Diags);
3917}