1//===--- Mangle.cpp - Mangle C++ Names --------------------------*- C++ -*-===//
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// Implements generic name mangling support for blocks and Objective-C.
10//
11//===----------------------------------------------------------------------===//
12#include "clang/AST/Attr.h"
13#include "clang/AST/ASTContext.h"
14#include "clang/AST/Decl.h"
15#include "clang/AST/DeclCXX.h"
16#include "clang/AST/DeclObjC.h"
17#include "clang/AST/DeclTemplate.h"
18#include "clang/AST/ExprCXX.h"
19#include "clang/AST/Mangle.h"
20#include "clang/AST/VTableBuilder.h"
21#include "clang/Basic/ABI.h"
22#include "clang/Basic/SourceManager.h"
23#include "clang/Basic/TargetInfo.h"
24#include "llvm/ADT/StringExtras.h"
25#include "llvm/IR/DataLayout.h"
26#include "llvm/IR/Mangler.h"
27#include "llvm/Support/ErrorHandling.h"
28#include "llvm/Support/Format.h"
29#include "llvm/Support/raw_ostream.h"
30
31using namespace clang;
32
33// FIXME: For blocks we currently mimic GCC's mangling scheme, which leaves
34// much to be desired. Come up with a better mangling scheme.
35
36static void mangleFunctionBlock(MangleContext &Context,
37 StringRef Outer,
38 const BlockDecl *BD,
39 raw_ostream &Out) {
40 unsigned discriminator = Context.getBlockId(BD, Local: true);
41 if (discriminator == 0)
42 Out << "__" << Outer << "_block_invoke";
43 else
44 Out << "__" << Outer << "_block_invoke_" << discriminator+1;
45}
46
47void MangleContext::anchor() { }
48
49enum CCMangling {
50 CCM_Other,
51 CCM_Fast,
52 CCM_RegCall,
53 CCM_Vector,
54 CCM_Std,
55 CCM_WasmMainArgcArgv
56};
57
58static bool isExternC(const NamedDecl *ND) {
59 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Val: ND))
60 return FD->isExternC();
61 if (const VarDecl *VD = dyn_cast<VarDecl>(Val: ND))
62 return VD->isExternC();
63 return false;
64}
65
66static CCMangling getCallingConvMangling(const ASTContext &Context,
67 const NamedDecl *ND) {
68 const TargetInfo &TI = Context.getTargetInfo();
69 const llvm::Triple &Triple = TI.getTriple();
70
71 // On wasm, the argc/argv form of "main" is renamed so that the startup code
72 // can call it with the correct function signature.
73 if (Triple.isWasm())
74 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Val: ND))
75 if (FD->isMain() && FD->getNumParams() == 2)
76 return CCM_WasmMainArgcArgv;
77
78 if (!Triple.isOSWindows() || !Triple.isX86())
79 return CCM_Other;
80
81 if (Context.getLangOpts().CPlusPlus && !isExternC(ND) &&
82 TI.getCXXABI() == TargetCXXABI::Microsoft)
83 return CCM_Other;
84
85 const FunctionDecl *FD = dyn_cast<FunctionDecl>(Val: ND);
86 if (!FD)
87 return CCM_Other;
88 QualType T = FD->getType();
89
90 const FunctionType *FT = T->castAs<FunctionType>();
91
92 CallingConv CC = FT->getCallConv();
93 switch (CC) {
94 default:
95 return CCM_Other;
96 case CC_X86FastCall:
97 return CCM_Fast;
98 case CC_X86StdCall:
99 return CCM_Std;
100 case CC_X86VectorCall:
101 return CCM_Vector;
102 }
103}
104
105bool MangleContext::shouldMangleDeclName(const NamedDecl *D) {
106 const ASTContext &ASTContext = getASTContext();
107
108 CCMangling CC = getCallingConvMangling(Context: ASTContext, ND: D);
109 if (CC != CCM_Other)
110 return true;
111
112 // If the declaration has an owning module for linkage purposes that needs to
113 // be mangled, we must mangle its name.
114 if (!D->hasExternalFormalLinkage() && D->getOwningModuleForLinkage())
115 return true;
116
117 // C functions with internal linkage have to be mangled with option
118 // -funique-internal-linkage-names.
119 if (!getASTContext().getLangOpts().CPlusPlus &&
120 isUniqueInternalLinkageDecl(ND: D))
121 return true;
122
123 // In C, functions with no attributes never need to be mangled. Fastpath them.
124 if (!getASTContext().getLangOpts().CPlusPlus && !D->hasAttrs())
125 return false;
126
127 // Any decl can be declared with __asm("foo") on it, and this takes precedence
128 // over all other naming in the .o file.
129 if (D->hasAttr<AsmLabelAttr>())
130 return true;
131
132 // Declarations that don't have identifier names always need to be mangled.
133 if (isa<MSGuidDecl>(Val: D))
134 return true;
135
136 return shouldMangleCXXName(D);
137}
138
139void MangleContext::mangleName(GlobalDecl GD, raw_ostream &Out) {
140 const ASTContext &ASTContext = getASTContext();
141 const NamedDecl *D = cast<NamedDecl>(Val: GD.getDecl());
142
143 // Any decl can be declared with __asm("foo") on it, and this takes precedence
144 // over all other naming in the .o file.
145 if (const AsmLabelAttr *ALA = D->getAttr<AsmLabelAttr>()) {
146 // If we have an asm name, then we use it as the mangling.
147
148 // If the label isn't literal, or if this is an alias for an LLVM intrinsic,
149 // do not add a "\01" prefix.
150 if (!ALA->getIsLiteralLabel() || ALA->getLabel().starts_with("llvm.")) {
151 Out << ALA->getLabel();
152 return;
153 }
154
155 // Adding the prefix can cause problems when one file has a "foo" and
156 // another has a "\01foo". That is known to happen on ELF with the
157 // tricks normally used for producing aliases (PR9177). Fortunately the
158 // llvm mangler on ELF is a nop, so we can just avoid adding the \01
159 // marker.
160 StringRef UserLabelPrefix =
161 getASTContext().getTargetInfo().getUserLabelPrefix();
162#ifndef NDEBUG
163 char GlobalPrefix =
164 llvm::DataLayout(getASTContext().getTargetInfo().getDataLayoutString())
165 .getGlobalPrefix();
166 assert((UserLabelPrefix.empty() && !GlobalPrefix) ||
167 (UserLabelPrefix.size() == 1 && UserLabelPrefix[0] == GlobalPrefix));
168#endif
169 if (!UserLabelPrefix.empty())
170 Out << '\01'; // LLVM IR Marker for __asm("foo")
171
172 Out << ALA->getLabel();
173 return;
174 }
175
176 if (auto *GD = dyn_cast<MSGuidDecl>(Val: D))
177 return mangleMSGuidDecl(GD, Out);
178
179 CCMangling CC = getCallingConvMangling(Context: ASTContext, ND: D);
180
181 if (CC == CCM_WasmMainArgcArgv) {
182 Out << "__main_argc_argv";
183 return;
184 }
185
186 bool MCXX = shouldMangleCXXName(D);
187 const TargetInfo &TI = Context.getTargetInfo();
188 if (CC == CCM_Other || (MCXX && TI.getCXXABI() == TargetCXXABI::Microsoft)) {
189 if (const ObjCMethodDecl *OMD = dyn_cast<ObjCMethodDecl>(Val: D))
190 mangleObjCMethodNameAsSourceName(MD: OMD, Out);
191 else
192 mangleCXXName(GD, Out);
193 return;
194 }
195
196 Out << '\01';
197 if (CC == CCM_Std)
198 Out << '_';
199 else if (CC == CCM_Fast)
200 Out << '@';
201 else if (CC == CCM_RegCall) {
202 if (getASTContext().getLangOpts().RegCall4)
203 Out << "__regcall4__";
204 else
205 Out << "__regcall3__";
206 }
207
208 if (!MCXX)
209 Out << D->getIdentifier()->getName();
210 else if (const ObjCMethodDecl *OMD = dyn_cast<ObjCMethodDecl>(Val: D))
211 mangleObjCMethodNameAsSourceName(MD: OMD, Out);
212 else
213 mangleCXXName(GD, Out);
214
215 const FunctionDecl *FD = cast<FunctionDecl>(Val: D);
216 const FunctionType *FT = FD->getType()->castAs<FunctionType>();
217 const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(Val: FT);
218 if (CC == CCM_Vector)
219 Out << '@';
220 Out << '@';
221 if (!Proto) {
222 Out << '0';
223 return;
224 }
225 assert(!Proto->isVariadic());
226 unsigned ArgWords = 0;
227 if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(Val: FD))
228 if (MD->isImplicitObjectMemberFunction())
229 ++ArgWords;
230 uint64_t DefaultPtrWidth = TI.getPointerWidth(AddrSpace: LangAS::Default);
231 for (const auto &AT : Proto->param_types()) {
232 // If an argument type is incomplete there is no way to get its size to
233 // correctly encode into the mangling scheme.
234 // Follow GCCs behaviour by simply breaking out of the loop.
235 if (AT->isIncompleteType())
236 break;
237 // Size should be aligned to pointer size.
238 ArgWords += llvm::alignTo(ASTContext.getTypeSize(AT), DefaultPtrWidth) /
239 DefaultPtrWidth;
240 }
241 Out << ((DefaultPtrWidth / 8) * ArgWords);
242}
243
244void MangleContext::mangleMSGuidDecl(const MSGuidDecl *GD, raw_ostream &Out) {
245 // For now, follow the MSVC naming convention for GUID objects on all
246 // targets.
247 MSGuidDecl::Parts P = GD->getParts();
248 Out << llvm::format(Fmt: "_GUID_%08" PRIx32 "_%04" PRIx32 "_%04" PRIx32 "_",
249 Vals: P.Part1, Vals: P.Part2, Vals: P.Part3);
250 unsigned I = 0;
251 for (uint8_t C : P.Part4And5) {
252 Out << llvm::format(Fmt: "%02" PRIx8, Vals: C);
253 if (++I == 2)
254 Out << "_";
255 }
256}
257
258void MangleContext::mangleGlobalBlock(const BlockDecl *BD,
259 const NamedDecl *ID,
260 raw_ostream &Out) {
261 unsigned discriminator = getBlockId(BD, Local: false);
262 if (ID) {
263 if (shouldMangleDeclName(D: ID))
264 mangleName(GD: ID, Out);
265 else {
266 Out << ID->getIdentifier()->getName();
267 }
268 }
269 if (discriminator == 0)
270 Out << "_block_invoke";
271 else
272 Out << "_block_invoke_" << discriminator+1;
273}
274
275void MangleContext::mangleCtorBlock(const CXXConstructorDecl *CD,
276 CXXCtorType CT, const BlockDecl *BD,
277 raw_ostream &ResStream) {
278 SmallString<64> Buffer;
279 llvm::raw_svector_ostream Out(Buffer);
280 mangleName(GD: GlobalDecl(CD, CT), Out);
281 mangleFunctionBlock(Context&: *this, Outer: Buffer, BD, Out&: ResStream);
282}
283
284void MangleContext::mangleDtorBlock(const CXXDestructorDecl *DD,
285 CXXDtorType DT, const BlockDecl *BD,
286 raw_ostream &ResStream) {
287 SmallString<64> Buffer;
288 llvm::raw_svector_ostream Out(Buffer);
289 mangleName(GD: GlobalDecl(DD, DT), Out);
290 mangleFunctionBlock(Context&: *this, Outer: Buffer, BD, Out&: ResStream);
291}
292
293void MangleContext::mangleBlock(const DeclContext *DC, const BlockDecl *BD,
294 raw_ostream &Out) {
295 assert(!isa<CXXConstructorDecl>(DC) && !isa<CXXDestructorDecl>(DC));
296
297 SmallString<64> Buffer;
298 llvm::raw_svector_ostream Stream(Buffer);
299 if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(Val: DC)) {
300 mangleObjCMethodNameAsSourceName(MD: Method, Stream);
301 } else {
302 assert((isa<NamedDecl>(DC) || isa<BlockDecl>(DC)) &&
303 "expected a NamedDecl or BlockDecl");
304 if (isa<BlockDecl>(Val: DC))
305 for (; DC && isa<BlockDecl>(Val: DC); DC = DC->getParent())
306 (void) getBlockId(BD: cast<BlockDecl>(Val: DC), Local: true);
307 assert((isa<TranslationUnitDecl>(DC) || isa<NamedDecl>(DC)) &&
308 "expected a TranslationUnitDecl or a NamedDecl");
309 if (const auto *CD = dyn_cast<CXXConstructorDecl>(Val: DC))
310 mangleCtorBlock(CD, /*CT*/ Ctor_Complete, BD, ResStream&: Out);
311 else if (const auto *DD = dyn_cast<CXXDestructorDecl>(Val: DC))
312 mangleDtorBlock(DD, /*DT*/ Dtor_Complete, BD, ResStream&: Out);
313 else if (auto ND = dyn_cast<NamedDecl>(Val: DC)) {
314 if (!shouldMangleDeclName(D: ND) && ND->getIdentifier())
315 Stream << ND->getIdentifier()->getName();
316 else {
317 // FIXME: We were doing a mangleUnqualifiedName() before, but that's
318 // a private member of a class that will soon itself be private to the
319 // Itanium C++ ABI object. What should we do now? Right now, I'm just
320 // calling the mangleName() method on the MangleContext; is there a
321 // better way?
322 mangleName(GD: ND, Out&: Stream);
323 }
324 }
325 }
326 mangleFunctionBlock(Context&: *this, Outer: Buffer, BD, Out);
327}
328
329void MangleContext::mangleObjCMethodName(const ObjCMethodDecl *MD,
330 raw_ostream &OS,
331 bool includePrefixByte,
332 bool includeCategoryNamespace) {
333 if (getASTContext().getLangOpts().ObjCRuntime.isGNUFamily()) {
334 // This is the mangling we've always used on the GNU runtimes, but it
335 // has obvious collisions in the face of underscores within class
336 // names, category names, and selectors; maybe we should improve it.
337
338 OS << (MD->isClassMethod() ? "_c_" : "_i_")
339 << MD->getClassInterface()->getName() << '_';
340
341 if (includeCategoryNamespace) {
342 if (auto category = MD->getCategory())
343 OS << category->getName();
344 }
345 OS << '_';
346
347 auto selector = MD->getSelector();
348 for (unsigned slotIndex = 0,
349 numArgs = selector.getNumArgs(),
350 slotEnd = std::max(a: numArgs, b: 1U);
351 slotIndex != slotEnd; ++slotIndex) {
352 if (auto name = selector.getIdentifierInfoForSlot(argIndex: slotIndex))
353 OS << name->getName();
354
355 // Replace all the positions that would've been ':' with '_'.
356 // That's after each slot except that a unary selector doesn't
357 // end in ':'.
358 if (numArgs)
359 OS << '_';
360 }
361
362 return;
363 }
364
365 // \01+[ContainerName(CategoryName) SelectorName]
366 if (includePrefixByte) {
367 OS << '\01';
368 }
369 OS << (MD->isInstanceMethod() ? '-' : '+') << '[';
370 if (const auto *CID = MD->getCategory()) {
371 OS << CID->getClassInterface()->getName();
372 if (includeCategoryNamespace) {
373 OS << '(' << *CID << ')';
374 }
375 } else if (const auto *CD =
376 dyn_cast<ObjCContainerDecl>(MD->getDeclContext())) {
377 OS << CD->getName();
378 } else {
379 llvm_unreachable("Unexpected ObjC method decl context");
380 }
381 OS << ' ';
382 MD->getSelector().print(OS);
383 OS << ']';
384}
385
386void MangleContext::mangleObjCMethodNameAsSourceName(const ObjCMethodDecl *MD,
387 raw_ostream &Out) {
388 SmallString<64> Name;
389 llvm::raw_svector_ostream OS(Name);
390
391 mangleObjCMethodName(MD, OS, /*includePrefixByte=*/false,
392 /*includeCategoryNamespace=*/true);
393 Out << OS.str().size() << OS.str();
394}
395
396class ASTNameGenerator::Implementation {
397 std::unique_ptr<MangleContext> MC;
398 llvm::DataLayout DL;
399
400public:
401 explicit Implementation(ASTContext &Ctx)
402 : MC(Ctx.createMangleContext()),
403 DL(Ctx.getTargetInfo().getDataLayoutString()) {}
404
405 bool writeName(const Decl *D, raw_ostream &OS) {
406 // First apply frontend mangling.
407 SmallString<128> FrontendBuf;
408 llvm::raw_svector_ostream FrontendBufOS(FrontendBuf);
409 if (auto *FD = dyn_cast<FunctionDecl>(Val: D)) {
410 if (FD->isDependentContext())
411 return true;
412 if (writeFuncOrVarName(FD, FrontendBufOS))
413 return true;
414 } else if (auto *VD = dyn_cast<VarDecl>(Val: D)) {
415 if (writeFuncOrVarName(VD, FrontendBufOS))
416 return true;
417 } else if (auto *MD = dyn_cast<ObjCMethodDecl>(Val: D)) {
418 MC->mangleObjCMethodName(MD, OS, /*includePrefixByte=*/false,
419 /*includeCategoryNamespace=*/true);
420 return false;
421 } else if (auto *ID = dyn_cast<ObjCInterfaceDecl>(Val: D)) {
422 writeObjCClassName(D: ID, OS&: FrontendBufOS);
423 } else {
424 return true;
425 }
426
427 // Now apply backend mangling.
428 llvm::Mangler::getNameWithPrefix(OS, GVName: FrontendBufOS.str(), DL);
429 return false;
430 }
431
432 std::string getName(const Decl *D) {
433 std::string Name;
434 {
435 llvm::raw_string_ostream OS(Name);
436 writeName(D, OS);
437 }
438 return Name;
439 }
440
441 enum ObjCKind {
442 ObjCClass,
443 ObjCMetaclass,
444 };
445
446 static StringRef getClassSymbolPrefix(ObjCKind Kind,
447 const ASTContext &Context) {
448 if (Context.getLangOpts().ObjCRuntime.isGNUFamily())
449 return Kind == ObjCMetaclass ? "_OBJC_METACLASS_" : "_OBJC_CLASS_";
450 return Kind == ObjCMetaclass ? "OBJC_METACLASS_$_" : "OBJC_CLASS_$_";
451 }
452
453 std::vector<std::string> getAllManglings(const ObjCContainerDecl *OCD) {
454 StringRef ClassName;
455 if (const auto *OID = dyn_cast<ObjCInterfaceDecl>(Val: OCD))
456 ClassName = OID->getObjCRuntimeNameAsString();
457 else if (const auto *OID = dyn_cast<ObjCImplementationDecl>(Val: OCD))
458 ClassName = OID->getObjCRuntimeNameAsString();
459
460 if (ClassName.empty())
461 return {};
462
463 auto Mangle = [&](ObjCKind Kind, StringRef ClassName) -> std::string {
464 SmallString<40> Mangled;
465 auto Prefix = getClassSymbolPrefix(Kind, Context: OCD->getASTContext());
466 llvm::Mangler::getNameWithPrefix(Mangled, Prefix + ClassName, DL);
467 return std::string(Mangled);
468 };
469
470 return {
471 Mangle(ObjCClass, ClassName),
472 Mangle(ObjCMetaclass, ClassName),
473 };
474 }
475
476 std::vector<std::string> getAllManglings(const Decl *D) {
477 if (const auto *OCD = dyn_cast<ObjCContainerDecl>(Val: D))
478 return getAllManglings(OCD);
479
480 if (!(isa<CXXRecordDecl>(Val: D) || isa<CXXMethodDecl>(Val: D)))
481 return {};
482
483 const NamedDecl *ND = cast<NamedDecl>(Val: D);
484
485 ASTContext &Ctx = ND->getASTContext();
486 std::unique_ptr<MangleContext> M(Ctx.createMangleContext());
487
488 std::vector<std::string> Manglings;
489
490 auto hasDefaultCXXMethodCC = [](ASTContext &C, const CXXMethodDecl *MD) {
491 auto DefaultCC = C.getDefaultCallingConvention(/*IsVariadic=*/false,
492 /*IsCXXMethod=*/true);
493 auto CC = MD->getType()->castAs<FunctionProtoType>()->getCallConv();
494 return CC == DefaultCC;
495 };
496
497 if (const auto *CD = dyn_cast_or_null<CXXConstructorDecl>(Val: ND)) {
498 Manglings.emplace_back(args: getMangledStructor(CD, Ctor_Base));
499
500 if (Ctx.getTargetInfo().getCXXABI().isItaniumFamily())
501 if (!CD->getParent()->isAbstract())
502 Manglings.emplace_back(args: getMangledStructor(CD, Ctor_Complete));
503
504 if (Ctx.getTargetInfo().getCXXABI().isMicrosoft())
505 if (CD->hasAttr<DLLExportAttr>() && CD->isDefaultConstructor())
506 if (!(hasDefaultCXXMethodCC(Ctx, CD) && CD->getNumParams() == 0))
507 Manglings.emplace_back(args: getMangledStructor(CD, Ctor_DefaultClosure));
508 } else if (const auto *DD = dyn_cast_or_null<CXXDestructorDecl>(Val: ND)) {
509 Manglings.emplace_back(args: getMangledStructor(DD, Dtor_Base));
510 if (Ctx.getTargetInfo().getCXXABI().isItaniumFamily()) {
511 Manglings.emplace_back(args: getMangledStructor(DD, Dtor_Complete));
512 if (DD->isVirtual())
513 Manglings.emplace_back(args: getMangledStructor(DD, Dtor_Deleting));
514 }
515 } else if (const auto *MD = dyn_cast_or_null<CXXMethodDecl>(Val: ND)) {
516 Manglings.emplace_back(args: getName(ND));
517 if (MD->isVirtual())
518 if (const auto *TIV = Ctx.getVTableContext()->getThunkInfo(MD))
519 for (const auto &T : *TIV)
520 Manglings.emplace_back(getMangledThunk(MD, T));
521 }
522
523 return Manglings;
524 }
525
526private:
527 bool writeFuncOrVarName(const NamedDecl *D, raw_ostream &OS) {
528 if (MC->shouldMangleDeclName(D)) {
529 GlobalDecl GD;
530 if (const auto *CtorD = dyn_cast<CXXConstructorDecl>(Val: D))
531 GD = GlobalDecl(CtorD, Ctor_Complete);
532 else if (const auto *DtorD = dyn_cast<CXXDestructorDecl>(Val: D))
533 GD = GlobalDecl(DtorD, Dtor_Complete);
534 else if (D->hasAttr<CUDAGlobalAttr>())
535 GD = GlobalDecl(cast<FunctionDecl>(Val: D));
536 else
537 GD = GlobalDecl(D);
538 MC->mangleName(GD, Out&: OS);
539 return false;
540 } else {
541 IdentifierInfo *II = D->getIdentifier();
542 if (!II)
543 return true;
544 OS << II->getName();
545 return false;
546 }
547 }
548
549 void writeObjCClassName(const ObjCInterfaceDecl *D, raw_ostream &OS) {
550 OS << getClassSymbolPrefix(Kind: ObjCClass, Context: D->getASTContext());
551 OS << D->getObjCRuntimeNameAsString();
552 }
553
554 std::string getMangledStructor(const NamedDecl *ND, unsigned StructorType) {
555 std::string FrontendBuf;
556 llvm::raw_string_ostream FOS(FrontendBuf);
557
558 GlobalDecl GD;
559 if (const auto *CD = dyn_cast_or_null<CXXConstructorDecl>(Val: ND))
560 GD = GlobalDecl(CD, static_cast<CXXCtorType>(StructorType));
561 else if (const auto *DD = dyn_cast_or_null<CXXDestructorDecl>(Val: ND))
562 GD = GlobalDecl(DD, static_cast<CXXDtorType>(StructorType));
563 MC->mangleName(GD, Out&: FOS);
564
565 std::string BackendBuf;
566 llvm::raw_string_ostream BOS(BackendBuf);
567
568 llvm::Mangler::getNameWithPrefix(OS&: BOS, GVName: FOS.str(), DL);
569
570 return BOS.str();
571 }
572
573 std::string getMangledThunk(const CXXMethodDecl *MD, const ThunkInfo &T) {
574 std::string FrontendBuf;
575 llvm::raw_string_ostream FOS(FrontendBuf);
576
577 MC->mangleThunk(MD, Thunk: T, FOS);
578
579 std::string BackendBuf;
580 llvm::raw_string_ostream BOS(BackendBuf);
581
582 llvm::Mangler::getNameWithPrefix(OS&: BOS, GVName: FOS.str(), DL);
583
584 return BOS.str();
585 }
586};
587
588ASTNameGenerator::ASTNameGenerator(ASTContext &Ctx)
589 : Impl(std::make_unique<Implementation>(args&: Ctx)) {}
590
591ASTNameGenerator::~ASTNameGenerator() {}
592
593bool ASTNameGenerator::writeName(const Decl *D, raw_ostream &OS) {
594 return Impl->writeName(D, OS);
595}
596
597std::string ASTNameGenerator::getName(const Decl *D) {
598 return Impl->getName(D);
599}
600
601std::vector<std::string> ASTNameGenerator::getAllManglings(const Decl *D) {
602 return Impl->getAllManglings(D);
603}
604

source code of clang/lib/AST/Mangle.cpp