ItaniumMangle.cpp revision eb2d1f1c88836bd5382e5d7aa8f6b85148a88b27
1//===--- ItaniumMangle.cpp - Itanium C++ Name Mangling ----------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9// 10// Implements C++ name mangling according to the Itanium C++ ABI, 11// which is used in GCC 3.2 and newer (and many compilers that are 12// ABI-compatible with GCC): 13// 14// http://www.codesourcery.com/public/cxx-abi/abi.html 15// 16//===----------------------------------------------------------------------===// 17#include "clang/AST/Mangle.h" 18#include "clang/AST/ASTContext.h" 19#include "clang/AST/Decl.h" 20#include "clang/AST/DeclCXX.h" 21#include "clang/AST/DeclObjC.h" 22#include "clang/AST/DeclTemplate.h" 23#include "clang/AST/ExprCXX.h" 24#include "clang/AST/ExprObjC.h" 25#include "clang/AST/TypeLoc.h" 26#include "clang/Basic/ABI.h" 27#include "clang/Basic/SourceManager.h" 28#include "clang/Basic/TargetInfo.h" 29#include "llvm/ADT/StringExtras.h" 30#include "llvm/Support/raw_ostream.h" 31#include "llvm/Support/ErrorHandling.h" 32 33#define MANGLE_CHECKER 0 34 35#if MANGLE_CHECKER 36#include <cxxabi.h> 37#endif 38 39using namespace clang; 40 41namespace { 42 43static const CXXRecordDecl *GetLocalClassDecl(const NamedDecl *ND) { 44 const DeclContext *DC = dyn_cast<DeclContext>(ND); 45 if (!DC) 46 DC = ND->getDeclContext(); 47 while (!DC->isNamespace() && !DC->isTranslationUnit()) { 48 if (isa<FunctionDecl>(DC->getParent())) 49 return dyn_cast<CXXRecordDecl>(DC); 50 DC = DC->getParent(); 51 } 52 return 0; 53} 54 55static const FunctionDecl *getStructor(const FunctionDecl *fn) { 56 if (const FunctionTemplateDecl *ftd = fn->getPrimaryTemplate()) 57 return ftd->getTemplatedDecl(); 58 59 return fn; 60} 61 62static const NamedDecl *getStructor(const NamedDecl *decl) { 63 const FunctionDecl *fn = dyn_cast_or_null<FunctionDecl>(decl); 64 return (fn ? getStructor(fn) : decl); 65} 66 67static const unsigned UnknownArity = ~0U; 68 69class ItaniumMangleContext : public MangleContext { 70 llvm::DenseMap<const TagDecl *, uint64_t> AnonStructIds; 71 unsigned Discriminator; 72 llvm::DenseMap<const NamedDecl*, unsigned> Uniquifier; 73 74public: 75 explicit ItaniumMangleContext(ASTContext &Context, 76 Diagnostic &Diags) 77 : MangleContext(Context, Diags) { } 78 79 uint64_t getAnonymousStructId(const TagDecl *TD) { 80 std::pair<llvm::DenseMap<const TagDecl *, 81 uint64_t>::iterator, bool> Result = 82 AnonStructIds.insert(std::make_pair(TD, AnonStructIds.size())); 83 return Result.first->second; 84 } 85 86 void startNewFunction() { 87 MangleContext::startNewFunction(); 88 mangleInitDiscriminator(); 89 } 90 91 /// @name Mangler Entry Points 92 /// @{ 93 94 bool shouldMangleDeclName(const NamedDecl *D); 95 void mangleName(const NamedDecl *D, raw_ostream &); 96 void mangleThunk(const CXXMethodDecl *MD, 97 const ThunkInfo &Thunk, 98 raw_ostream &); 99 void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type, 100 const ThisAdjustment &ThisAdjustment, 101 raw_ostream &); 102 void mangleReferenceTemporary(const VarDecl *D, 103 raw_ostream &); 104 void mangleCXXVTable(const CXXRecordDecl *RD, 105 raw_ostream &); 106 void mangleCXXVTT(const CXXRecordDecl *RD, 107 raw_ostream &); 108 void mangleCXXCtorVTable(const CXXRecordDecl *RD, int64_t Offset, 109 const CXXRecordDecl *Type, 110 raw_ostream &); 111 void mangleCXXRTTI(QualType T, raw_ostream &); 112 void mangleCXXRTTIName(QualType T, raw_ostream &); 113 void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type, 114 raw_ostream &); 115 void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type, 116 raw_ostream &); 117 118 void mangleItaniumGuardVariable(const VarDecl *D, raw_ostream &); 119 120 void mangleInitDiscriminator() { 121 Discriminator = 0; 122 } 123 124 bool getNextDiscriminator(const NamedDecl *ND, unsigned &disc) { 125 unsigned &discriminator = Uniquifier[ND]; 126 if (!discriminator) 127 discriminator = ++Discriminator; 128 if (discriminator == 1) 129 return false; 130 disc = discriminator-2; 131 return true; 132 } 133 /// @} 134}; 135 136/// CXXNameMangler - Manage the mangling of a single name. 137class CXXNameMangler { 138 ItaniumMangleContext &Context; 139 raw_ostream &Out; 140 141 /// The "structor" is the top-level declaration being mangled, if 142 /// that's not a template specialization; otherwise it's the pattern 143 /// for that specialization. 144 const NamedDecl *Structor; 145 unsigned StructorType; 146 147 /// SeqID - The next subsitution sequence number. 148 unsigned SeqID; 149 150 class FunctionTypeDepthState { 151 unsigned Bits; 152 153 enum { InResultTypeMask = 1 }; 154 155 public: 156 FunctionTypeDepthState() : Bits(0) {} 157 158 /// The number of function types we're inside. 159 unsigned getDepth() const { 160 return Bits >> 1; 161 } 162 163 /// True if we're in the return type of the innermost function type. 164 bool isInResultType() const { 165 return Bits & InResultTypeMask; 166 } 167 168 FunctionTypeDepthState push() { 169 FunctionTypeDepthState tmp = *this; 170 Bits = (Bits & ~InResultTypeMask) + 2; 171 return tmp; 172 } 173 174 void enterResultType() { 175 Bits |= InResultTypeMask; 176 } 177 178 void leaveResultType() { 179 Bits &= ~InResultTypeMask; 180 } 181 182 void pop(FunctionTypeDepthState saved) { 183 assert(getDepth() == saved.getDepth() + 1); 184 Bits = saved.Bits; 185 } 186 187 } FunctionTypeDepth; 188 189 llvm::DenseMap<uintptr_t, unsigned> Substitutions; 190 191 ASTContext &getASTContext() const { return Context.getASTContext(); } 192 193public: 194 CXXNameMangler(ItaniumMangleContext &C, raw_ostream &Out_, 195 const NamedDecl *D = 0) 196 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(0), 197 SeqID(0) { 198 // These can't be mangled without a ctor type or dtor type. 199 assert(!D || (!isa<CXXDestructorDecl>(D) && 200 !isa<CXXConstructorDecl>(D))); 201 } 202 CXXNameMangler(ItaniumMangleContext &C, raw_ostream &Out_, 203 const CXXConstructorDecl *D, CXXCtorType Type) 204 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type), 205 SeqID(0) { } 206 CXXNameMangler(ItaniumMangleContext &C, raw_ostream &Out_, 207 const CXXDestructorDecl *D, CXXDtorType Type) 208 : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type), 209 SeqID(0) { } 210 211#if MANGLE_CHECKER 212 ~CXXNameMangler() { 213 if (Out.str()[0] == '\01') 214 return; 215 216 int status = 0; 217 char *result = abi::__cxa_demangle(Out.str().str().c_str(), 0, 0, &status); 218 assert(status == 0 && "Could not demangle mangled name!"); 219 free(result); 220 } 221#endif 222 raw_ostream &getStream() { return Out; } 223 224 void mangle(const NamedDecl *D, StringRef Prefix = "_Z"); 225 void mangleCallOffset(int64_t NonVirtual, int64_t Virtual); 226 void mangleNumber(const llvm::APSInt &I); 227 void mangleNumber(int64_t Number); 228 void mangleFloat(const llvm::APFloat &F); 229 void mangleFunctionEncoding(const FunctionDecl *FD); 230 void mangleName(const NamedDecl *ND); 231 void mangleType(QualType T); 232 void mangleNameOrStandardSubstitution(const NamedDecl *ND); 233 234private: 235 bool mangleSubstitution(const NamedDecl *ND); 236 bool mangleSubstitution(QualType T); 237 bool mangleSubstitution(TemplateName Template); 238 bool mangleSubstitution(uintptr_t Ptr); 239 240 void mangleExistingSubstitution(QualType type); 241 void mangleExistingSubstitution(TemplateName name); 242 243 bool mangleStandardSubstitution(const NamedDecl *ND); 244 245 void addSubstitution(const NamedDecl *ND) { 246 ND = cast<NamedDecl>(ND->getCanonicalDecl()); 247 248 addSubstitution(reinterpret_cast<uintptr_t>(ND)); 249 } 250 void addSubstitution(QualType T); 251 void addSubstitution(TemplateName Template); 252 void addSubstitution(uintptr_t Ptr); 253 254 void mangleUnresolvedPrefix(NestedNameSpecifier *qualifier, 255 NamedDecl *firstQualifierLookup, 256 bool recursive = false); 257 void mangleUnresolvedName(NestedNameSpecifier *qualifier, 258 NamedDecl *firstQualifierLookup, 259 DeclarationName name, 260 unsigned KnownArity = UnknownArity); 261 262 void mangleName(const TemplateDecl *TD, 263 const TemplateArgument *TemplateArgs, 264 unsigned NumTemplateArgs); 265 void mangleUnqualifiedName(const NamedDecl *ND) { 266 mangleUnqualifiedName(ND, ND->getDeclName(), UnknownArity); 267 } 268 void mangleUnqualifiedName(const NamedDecl *ND, DeclarationName Name, 269 unsigned KnownArity); 270 void mangleUnscopedName(const NamedDecl *ND); 271 void mangleUnscopedTemplateName(const TemplateDecl *ND); 272 void mangleUnscopedTemplateName(TemplateName); 273 void mangleSourceName(const IdentifierInfo *II); 274 void mangleLocalName(const NamedDecl *ND); 275 void mangleNestedName(const NamedDecl *ND, const DeclContext *DC, 276 bool NoFunction=false); 277 void mangleNestedName(const TemplateDecl *TD, 278 const TemplateArgument *TemplateArgs, 279 unsigned NumTemplateArgs); 280 void manglePrefix(NestedNameSpecifier *qualifier); 281 void manglePrefix(const DeclContext *DC, bool NoFunction=false); 282 void manglePrefix(QualType type); 283 void mangleTemplatePrefix(const TemplateDecl *ND); 284 void mangleTemplatePrefix(TemplateName Template); 285 void mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity); 286 void mangleQualifiers(Qualifiers Quals); 287 void mangleRefQualifier(RefQualifierKind RefQualifier); 288 289 void mangleObjCMethodName(const ObjCMethodDecl *MD); 290 291 // Declare manglers for every type class. 292#define ABSTRACT_TYPE(CLASS, PARENT) 293#define NON_CANONICAL_TYPE(CLASS, PARENT) 294#define TYPE(CLASS, PARENT) void mangleType(const CLASS##Type *T); 295#include "clang/AST/TypeNodes.def" 296 297 void mangleType(const TagType*); 298 void mangleType(TemplateName); 299 void mangleBareFunctionType(const FunctionType *T, 300 bool MangleReturnType); 301 void mangleNeonVectorType(const VectorType *T); 302 303 void mangleIntegerLiteral(QualType T, const llvm::APSInt &Value); 304 void mangleMemberExpr(const Expr *base, bool isArrow, 305 NestedNameSpecifier *qualifier, 306 NamedDecl *firstQualifierLookup, 307 DeclarationName name, 308 unsigned knownArity); 309 void mangleExpression(const Expr *E, unsigned Arity = UnknownArity); 310 void mangleCXXCtorType(CXXCtorType T); 311 void mangleCXXDtorType(CXXDtorType T); 312 313 void mangleTemplateArgs(const ASTTemplateArgumentListInfo &TemplateArgs); 314 void mangleTemplateArgs(TemplateName Template, 315 const TemplateArgument *TemplateArgs, 316 unsigned NumTemplateArgs); 317 void mangleTemplateArgs(const TemplateParameterList &PL, 318 const TemplateArgument *TemplateArgs, 319 unsigned NumTemplateArgs); 320 void mangleTemplateArgs(const TemplateParameterList &PL, 321 const TemplateArgumentList &AL); 322 void mangleTemplateArg(const NamedDecl *P, TemplateArgument A); 323 void mangleUnresolvedTemplateArgs(const TemplateArgument *args, 324 unsigned numArgs); 325 326 void mangleTemplateParameter(unsigned Index); 327 328 void mangleFunctionParam(const ParmVarDecl *parm); 329}; 330 331} 332 333static bool isInCLinkageSpecification(const Decl *D) { 334 D = D->getCanonicalDecl(); 335 for (const DeclContext *DC = D->getDeclContext(); 336 !DC->isTranslationUnit(); DC = DC->getParent()) { 337 if (const LinkageSpecDecl *Linkage = dyn_cast<LinkageSpecDecl>(DC)) 338 return Linkage->getLanguage() == LinkageSpecDecl::lang_c; 339 } 340 341 return false; 342} 343 344bool ItaniumMangleContext::shouldMangleDeclName(const NamedDecl *D) { 345 // In C, functions with no attributes never need to be mangled. Fastpath them. 346 if (!getASTContext().getLangOptions().CPlusPlus && !D->hasAttrs()) 347 return false; 348 349 // Any decl can be declared with __asm("foo") on it, and this takes precedence 350 // over all other naming in the .o file. 351 if (D->hasAttr<AsmLabelAttr>()) 352 return true; 353 354 // Clang's "overloadable" attribute extension to C/C++ implies name mangling 355 // (always) as does passing a C++ member function and a function 356 // whose name is not a simple identifier. 357 const FunctionDecl *FD = dyn_cast<FunctionDecl>(D); 358 if (FD && (FD->hasAttr<OverloadableAttr>() || isa<CXXMethodDecl>(FD) || 359 !FD->getDeclName().isIdentifier())) 360 return true; 361 362 // Otherwise, no mangling is done outside C++ mode. 363 if (!getASTContext().getLangOptions().CPlusPlus) 364 return false; 365 366 // Variables at global scope with non-internal linkage are not mangled 367 if (!FD) { 368 const DeclContext *DC = D->getDeclContext(); 369 // Check for extern variable declared locally. 370 if (DC->isFunctionOrMethod() && D->hasLinkage()) 371 while (!DC->isNamespace() && !DC->isTranslationUnit()) 372 DC = DC->getParent(); 373 if (DC->isTranslationUnit() && D->getLinkage() != InternalLinkage) 374 return false; 375 } 376 377 // Class members are always mangled. 378 if (D->getDeclContext()->isRecord()) 379 return true; 380 381 // C functions and "main" are not mangled. 382 if ((FD && FD->isMain()) || isInCLinkageSpecification(D)) 383 return false; 384 385 return true; 386} 387 388void CXXNameMangler::mangle(const NamedDecl *D, StringRef Prefix) { 389 // Any decl can be declared with __asm("foo") on it, and this takes precedence 390 // over all other naming in the .o file. 391 if (const AsmLabelAttr *ALA = D->getAttr<AsmLabelAttr>()) { 392 // If we have an asm name, then we use it as the mangling. 393 394 // Adding the prefix can cause problems when one file has a "foo" and 395 // another has a "\01foo". That is known to happen on ELF with the 396 // tricks normally used for producing aliases (PR9177). Fortunately the 397 // llvm mangler on ELF is a nop, so we can just avoid adding the \01 398 // marker. We also avoid adding the marker if this is an alias for an 399 // LLVM intrinsic. 400 StringRef UserLabelPrefix = 401 getASTContext().getTargetInfo().getUserLabelPrefix(); 402 if (!UserLabelPrefix.empty() && !ALA->getLabel().startswith("llvm.")) 403 Out << '\01'; // LLVM IR Marker for __asm("foo") 404 405 Out << ALA->getLabel(); 406 return; 407 } 408 409 // <mangled-name> ::= _Z <encoding> 410 // ::= <data name> 411 // ::= <special-name> 412 Out << Prefix; 413 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) 414 mangleFunctionEncoding(FD); 415 else if (const VarDecl *VD = dyn_cast<VarDecl>(D)) 416 mangleName(VD); 417 else 418 mangleName(cast<FieldDecl>(D)); 419} 420 421void CXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD) { 422 // <encoding> ::= <function name> <bare-function-type> 423 mangleName(FD); 424 425 // Don't mangle in the type if this isn't a decl we should typically mangle. 426 if (!Context.shouldMangleDeclName(FD)) 427 return; 428 429 // Whether the mangling of a function type includes the return type depends on 430 // the context and the nature of the function. The rules for deciding whether 431 // the return type is included are: 432 // 433 // 1. Template functions (names or types) have return types encoded, with 434 // the exceptions listed below. 435 // 2. Function types not appearing as part of a function name mangling, 436 // e.g. parameters, pointer types, etc., have return type encoded, with the 437 // exceptions listed below. 438 // 3. Non-template function names do not have return types encoded. 439 // 440 // The exceptions mentioned in (1) and (2) above, for which the return type is 441 // never included, are 442 // 1. Constructors. 443 // 2. Destructors. 444 // 3. Conversion operator functions, e.g. operator int. 445 bool MangleReturnType = false; 446 if (FunctionTemplateDecl *PrimaryTemplate = FD->getPrimaryTemplate()) { 447 if (!(isa<CXXConstructorDecl>(FD) || isa<CXXDestructorDecl>(FD) || 448 isa<CXXConversionDecl>(FD))) 449 MangleReturnType = true; 450 451 // Mangle the type of the primary template. 452 FD = PrimaryTemplate->getTemplatedDecl(); 453 } 454 455 mangleBareFunctionType(FD->getType()->getAs<FunctionType>(), 456 MangleReturnType); 457} 458 459static const DeclContext *IgnoreLinkageSpecDecls(const DeclContext *DC) { 460 while (isa<LinkageSpecDecl>(DC)) { 461 DC = DC->getParent(); 462 } 463 464 return DC; 465} 466 467/// isStd - Return whether a given namespace is the 'std' namespace. 468static bool isStd(const NamespaceDecl *NS) { 469 if (!IgnoreLinkageSpecDecls(NS->getParent())->isTranslationUnit()) 470 return false; 471 472 const IdentifierInfo *II = NS->getOriginalNamespace()->getIdentifier(); 473 return II && II->isStr("std"); 474} 475 476// isStdNamespace - Return whether a given decl context is a toplevel 'std' 477// namespace. 478static bool isStdNamespace(const DeclContext *DC) { 479 if (!DC->isNamespace()) 480 return false; 481 482 return isStd(cast<NamespaceDecl>(DC)); 483} 484 485static const TemplateDecl * 486isTemplate(const NamedDecl *ND, const TemplateArgumentList *&TemplateArgs) { 487 // Check if we have a function template. 488 if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)){ 489 if (const TemplateDecl *TD = FD->getPrimaryTemplate()) { 490 TemplateArgs = FD->getTemplateSpecializationArgs(); 491 return TD; 492 } 493 } 494 495 // Check if we have a class template. 496 if (const ClassTemplateSpecializationDecl *Spec = 497 dyn_cast<ClassTemplateSpecializationDecl>(ND)) { 498 TemplateArgs = &Spec->getTemplateArgs(); 499 return Spec->getSpecializedTemplate(); 500 } 501 502 return 0; 503} 504 505void CXXNameMangler::mangleName(const NamedDecl *ND) { 506 // <name> ::= <nested-name> 507 // ::= <unscoped-name> 508 // ::= <unscoped-template-name> <template-args> 509 // ::= <local-name> 510 // 511 const DeclContext *DC = ND->getDeclContext(); 512 513 // If this is an extern variable declared locally, the relevant DeclContext 514 // is that of the containing namespace, or the translation unit. 515 if (isa<FunctionDecl>(DC) && ND->hasLinkage()) 516 while (!DC->isNamespace() && !DC->isTranslationUnit()) 517 DC = DC->getParent(); 518 else if (GetLocalClassDecl(ND)) { 519 mangleLocalName(ND); 520 return; 521 } 522 523 while (isa<LinkageSpecDecl>(DC)) 524 DC = DC->getParent(); 525 526 if (DC->isTranslationUnit() || isStdNamespace(DC)) { 527 // Check if we have a template. 528 const TemplateArgumentList *TemplateArgs = 0; 529 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) { 530 mangleUnscopedTemplateName(TD); 531 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 532 mangleTemplateArgs(*TemplateParameters, *TemplateArgs); 533 return; 534 } 535 536 mangleUnscopedName(ND); 537 return; 538 } 539 540 if (isa<FunctionDecl>(DC) || isa<ObjCMethodDecl>(DC)) { 541 mangleLocalName(ND); 542 return; 543 } 544 545 mangleNestedName(ND, DC); 546} 547void CXXNameMangler::mangleName(const TemplateDecl *TD, 548 const TemplateArgument *TemplateArgs, 549 unsigned NumTemplateArgs) { 550 const DeclContext *DC = IgnoreLinkageSpecDecls(TD->getDeclContext()); 551 552 if (DC->isTranslationUnit() || isStdNamespace(DC)) { 553 mangleUnscopedTemplateName(TD); 554 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 555 mangleTemplateArgs(*TemplateParameters, TemplateArgs, NumTemplateArgs); 556 } else { 557 mangleNestedName(TD, TemplateArgs, NumTemplateArgs); 558 } 559} 560 561void CXXNameMangler::mangleUnscopedName(const NamedDecl *ND) { 562 // <unscoped-name> ::= <unqualified-name> 563 // ::= St <unqualified-name> # ::std:: 564 if (isStdNamespace(ND->getDeclContext())) 565 Out << "St"; 566 567 mangleUnqualifiedName(ND); 568} 569 570void CXXNameMangler::mangleUnscopedTemplateName(const TemplateDecl *ND) { 571 // <unscoped-template-name> ::= <unscoped-name> 572 // ::= <substitution> 573 if (mangleSubstitution(ND)) 574 return; 575 576 // <template-template-param> ::= <template-param> 577 if (const TemplateTemplateParmDecl *TTP 578 = dyn_cast<TemplateTemplateParmDecl>(ND)) { 579 mangleTemplateParameter(TTP->getIndex()); 580 return; 581 } 582 583 mangleUnscopedName(ND->getTemplatedDecl()); 584 addSubstitution(ND); 585} 586 587void CXXNameMangler::mangleUnscopedTemplateName(TemplateName Template) { 588 // <unscoped-template-name> ::= <unscoped-name> 589 // ::= <substitution> 590 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 591 return mangleUnscopedTemplateName(TD); 592 593 if (mangleSubstitution(Template)) 594 return; 595 596 DependentTemplateName *Dependent = Template.getAsDependentTemplateName(); 597 assert(Dependent && "Not a dependent template name?"); 598 if (const IdentifierInfo *Id = Dependent->getIdentifier()) 599 mangleSourceName(Id); 600 else 601 mangleOperatorName(Dependent->getOperator(), UnknownArity); 602 603 addSubstitution(Template); 604} 605 606void CXXNameMangler::mangleFloat(const llvm::APFloat &f) { 607 // ABI: 608 // Floating-point literals are encoded using a fixed-length 609 // lowercase hexadecimal string corresponding to the internal 610 // representation (IEEE on Itanium), high-order bytes first, 611 // without leading zeroes. For example: "Lf bf800000 E" is -1.0f 612 // on Itanium. 613 // APInt::toString uses uppercase hexadecimal, and it's not really 614 // worth embellishing that interface for this use case, so we just 615 // do a second pass to lowercase things. 616 typedef llvm::SmallString<20> buffer_t; 617 buffer_t buffer; 618 f.bitcastToAPInt().toString(buffer, 16, false); 619 620 for (buffer_t::iterator i = buffer.begin(), e = buffer.end(); i != e; ++i) 621 if (isupper(*i)) *i = tolower(*i); 622 623 Out.write(buffer.data(), buffer.size()); 624} 625 626void CXXNameMangler::mangleNumber(const llvm::APSInt &Value) { 627 if (Value.isSigned() && Value.isNegative()) { 628 Out << 'n'; 629 Value.abs().print(Out, true); 630 } else 631 Value.print(Out, Value.isSigned()); 632} 633 634void CXXNameMangler::mangleNumber(int64_t Number) { 635 // <number> ::= [n] <non-negative decimal integer> 636 if (Number < 0) { 637 Out << 'n'; 638 Number = -Number; 639 } 640 641 Out << Number; 642} 643 644void CXXNameMangler::mangleCallOffset(int64_t NonVirtual, int64_t Virtual) { 645 // <call-offset> ::= h <nv-offset> _ 646 // ::= v <v-offset> _ 647 // <nv-offset> ::= <offset number> # non-virtual base override 648 // <v-offset> ::= <offset number> _ <virtual offset number> 649 // # virtual base override, with vcall offset 650 if (!Virtual) { 651 Out << 'h'; 652 mangleNumber(NonVirtual); 653 Out << '_'; 654 return; 655 } 656 657 Out << 'v'; 658 mangleNumber(NonVirtual); 659 Out << '_'; 660 mangleNumber(Virtual); 661 Out << '_'; 662} 663 664void CXXNameMangler::manglePrefix(QualType type) { 665 if (const TemplateSpecializationType *TST = 666 type->getAs<TemplateSpecializationType>()) { 667 if (!mangleSubstitution(QualType(TST, 0))) { 668 mangleTemplatePrefix(TST->getTemplateName()); 669 670 // FIXME: GCC does not appear to mangle the template arguments when 671 // the template in question is a dependent template name. Should we 672 // emulate that badness? 673 mangleTemplateArgs(TST->getTemplateName(), TST->getArgs(), 674 TST->getNumArgs()); 675 addSubstitution(QualType(TST, 0)); 676 } 677 } else if (const DependentTemplateSpecializationType *DTST 678 = type->getAs<DependentTemplateSpecializationType>()) { 679 TemplateName Template 680 = getASTContext().getDependentTemplateName(DTST->getQualifier(), 681 DTST->getIdentifier()); 682 mangleTemplatePrefix(Template); 683 684 // FIXME: GCC does not appear to mangle the template arguments when 685 // the template in question is a dependent template name. Should we 686 // emulate that badness? 687 mangleTemplateArgs(Template, DTST->getArgs(), DTST->getNumArgs()); 688 } else { 689 // We use the QualType mangle type variant here because it handles 690 // substitutions. 691 mangleType(type); 692 } 693} 694 695/// Mangle everything prior to the base-unresolved-name in an unresolved-name. 696/// 697/// \param firstQualifierLookup - the entity found by unqualified lookup 698/// for the first name in the qualifier, if this is for a member expression 699/// \param recursive - true if this is being called recursively, 700/// i.e. if there is more prefix "to the right". 701void CXXNameMangler::mangleUnresolvedPrefix(NestedNameSpecifier *qualifier, 702 NamedDecl *firstQualifierLookup, 703 bool recursive) { 704 705 // x, ::x 706 // <unresolved-name> ::= [gs] <base-unresolved-name> 707 708 // T::x / decltype(p)::x 709 // <unresolved-name> ::= sr <unresolved-type> <base-unresolved-name> 710 711 // T::N::x /decltype(p)::N::x 712 // <unresolved-name> ::= srN <unresolved-type> <unresolved-qualifier-level>+ E 713 // <base-unresolved-name> 714 715 // A::x, N::y, A<T>::z; "gs" means leading "::" 716 // <unresolved-name> ::= [gs] sr <unresolved-qualifier-level>+ E 717 // <base-unresolved-name> 718 719 switch (qualifier->getKind()) { 720 case NestedNameSpecifier::Global: 721 Out << "gs"; 722 723 // We want an 'sr' unless this is the entire NNS. 724 if (recursive) 725 Out << "sr"; 726 727 // We never want an 'E' here. 728 return; 729 730 case NestedNameSpecifier::Namespace: 731 if (qualifier->getPrefix()) 732 mangleUnresolvedPrefix(qualifier->getPrefix(), firstQualifierLookup, 733 /*recursive*/ true); 734 else 735 Out << "sr"; 736 mangleSourceName(qualifier->getAsNamespace()->getIdentifier()); 737 break; 738 case NestedNameSpecifier::NamespaceAlias: 739 if (qualifier->getPrefix()) 740 mangleUnresolvedPrefix(qualifier->getPrefix(), firstQualifierLookup, 741 /*recursive*/ true); 742 else 743 Out << "sr"; 744 mangleSourceName(qualifier->getAsNamespaceAlias()->getIdentifier()); 745 break; 746 747 case NestedNameSpecifier::TypeSpec: 748 case NestedNameSpecifier::TypeSpecWithTemplate: { 749 const Type *type = qualifier->getAsType(); 750 751 // We only want to use an unresolved-type encoding if this is one of: 752 // - a decltype 753 // - a template type parameter 754 // - a template template parameter with arguments 755 // In all of these cases, we should have no prefix. 756 if (qualifier->getPrefix()) { 757 mangleUnresolvedPrefix(qualifier->getPrefix(), firstQualifierLookup, 758 /*recursive*/ true); 759 } else { 760 // Otherwise, all the cases want this. 761 Out << "sr"; 762 } 763 764 // Only certain other types are valid as prefixes; enumerate them. 765 switch (type->getTypeClass()) { 766 case Type::Builtin: 767 case Type::Complex: 768 case Type::Pointer: 769 case Type::BlockPointer: 770 case Type::LValueReference: 771 case Type::RValueReference: 772 case Type::MemberPointer: 773 case Type::ConstantArray: 774 case Type::IncompleteArray: 775 case Type::VariableArray: 776 case Type::DependentSizedArray: 777 case Type::DependentSizedExtVector: 778 case Type::Vector: 779 case Type::ExtVector: 780 case Type::FunctionProto: 781 case Type::FunctionNoProto: 782 case Type::Enum: 783 case Type::Paren: 784 case Type::Elaborated: 785 case Type::Attributed: 786 case Type::Auto: 787 case Type::PackExpansion: 788 case Type::ObjCObject: 789 case Type::ObjCInterface: 790 case Type::ObjCObjectPointer: 791 llvm_unreachable("type is illegal as a nested name specifier"); 792 793 case Type::SubstTemplateTypeParmPack: 794 // FIXME: not clear how to mangle this! 795 // template <class T...> class A { 796 // template <class U...> void foo(decltype(T::foo(U())) x...); 797 // }; 798 Out << "_SUBSTPACK_"; 799 break; 800 801 // <unresolved-type> ::= <template-param> 802 // ::= <decltype> 803 // ::= <template-template-param> <template-args> 804 // (this last is not official yet) 805 case Type::TypeOfExpr: 806 case Type::TypeOf: 807 case Type::Decltype: 808 case Type::TemplateTypeParm: 809 case Type::UnaryTransform: 810 case Type::SubstTemplateTypeParm: 811 unresolvedType: 812 assert(!qualifier->getPrefix()); 813 814 // We only get here recursively if we're followed by identifiers. 815 if (recursive) Out << 'N'; 816 817 // This seems to do everything we want. It's not really 818 // sanctioned for a substituted template parameter, though. 819 mangleType(QualType(type, 0)); 820 821 // We never want to print 'E' directly after an unresolved-type, 822 // so we return directly. 823 return; 824 825 case Type::Typedef: 826 mangleSourceName(cast<TypedefType>(type)->getDecl()->getIdentifier()); 827 break; 828 829 case Type::UnresolvedUsing: 830 mangleSourceName(cast<UnresolvedUsingType>(type)->getDecl() 831 ->getIdentifier()); 832 break; 833 834 case Type::Record: 835 mangleSourceName(cast<RecordType>(type)->getDecl()->getIdentifier()); 836 break; 837 838 case Type::TemplateSpecialization: { 839 const TemplateSpecializationType *tst 840 = cast<TemplateSpecializationType>(type); 841 TemplateName name = tst->getTemplateName(); 842 switch (name.getKind()) { 843 case TemplateName::Template: 844 case TemplateName::QualifiedTemplate: { 845 TemplateDecl *temp = name.getAsTemplateDecl(); 846 847 // If the base is a template template parameter, this is an 848 // unresolved type. 849 assert(temp && "no template for template specialization type"); 850 if (isa<TemplateTemplateParmDecl>(temp)) goto unresolvedType; 851 852 mangleSourceName(temp->getIdentifier()); 853 break; 854 } 855 856 case TemplateName::OverloadedTemplate: 857 case TemplateName::DependentTemplate: 858 llvm_unreachable("invalid base for a template specialization type"); 859 860 case TemplateName::SubstTemplateTemplateParm: { 861 SubstTemplateTemplateParmStorage *subst 862 = name.getAsSubstTemplateTemplateParm(); 863 mangleExistingSubstitution(subst->getReplacement()); 864 break; 865 } 866 867 case TemplateName::SubstTemplateTemplateParmPack: { 868 // FIXME: not clear how to mangle this! 869 // template <template <class U> class T...> class A { 870 // template <class U...> void foo(decltype(T<U>::foo) x...); 871 // }; 872 Out << "_SUBSTPACK_"; 873 break; 874 } 875 } 876 877 mangleUnresolvedTemplateArgs(tst->getArgs(), tst->getNumArgs()); 878 break; 879 } 880 881 case Type::InjectedClassName: 882 mangleSourceName(cast<InjectedClassNameType>(type)->getDecl() 883 ->getIdentifier()); 884 break; 885 886 case Type::DependentName: 887 mangleSourceName(cast<DependentNameType>(type)->getIdentifier()); 888 break; 889 890 case Type::DependentTemplateSpecialization: { 891 const DependentTemplateSpecializationType *tst 892 = cast<DependentTemplateSpecializationType>(type); 893 mangleSourceName(tst->getIdentifier()); 894 mangleUnresolvedTemplateArgs(tst->getArgs(), tst->getNumArgs()); 895 break; 896 } 897 } 898 break; 899 } 900 901 case NestedNameSpecifier::Identifier: 902 // Member expressions can have these without prefixes. 903 if (qualifier->getPrefix()) { 904 mangleUnresolvedPrefix(qualifier->getPrefix(), firstQualifierLookup, 905 /*recursive*/ true); 906 } else if (firstQualifierLookup) { 907 908 // Try to make a proper qualifier out of the lookup result, and 909 // then just recurse on that. 910 NestedNameSpecifier *newQualifier; 911 if (TypeDecl *typeDecl = dyn_cast<TypeDecl>(firstQualifierLookup)) { 912 QualType type = getASTContext().getTypeDeclType(typeDecl); 913 914 // Pretend we had a different nested name specifier. 915 newQualifier = NestedNameSpecifier::Create(getASTContext(), 916 /*prefix*/ 0, 917 /*template*/ false, 918 type.getTypePtr()); 919 } else if (NamespaceDecl *nspace = 920 dyn_cast<NamespaceDecl>(firstQualifierLookup)) { 921 newQualifier = NestedNameSpecifier::Create(getASTContext(), 922 /*prefix*/ 0, 923 nspace); 924 } else if (NamespaceAliasDecl *alias = 925 dyn_cast<NamespaceAliasDecl>(firstQualifierLookup)) { 926 newQualifier = NestedNameSpecifier::Create(getASTContext(), 927 /*prefix*/ 0, 928 alias); 929 } else { 930 // No sensible mangling to do here. 931 newQualifier = 0; 932 } 933 934 if (newQualifier) 935 return mangleUnresolvedPrefix(newQualifier, /*lookup*/ 0, recursive); 936 937 } else { 938 Out << "sr"; 939 } 940 941 mangleSourceName(qualifier->getAsIdentifier()); 942 break; 943 } 944 945 // If this was the innermost part of the NNS, and we fell out to 946 // here, append an 'E'. 947 if (!recursive) 948 Out << 'E'; 949} 950 951/// Mangle an unresolved-name, which is generally used for names which 952/// weren't resolved to specific entities. 953void CXXNameMangler::mangleUnresolvedName(NestedNameSpecifier *qualifier, 954 NamedDecl *firstQualifierLookup, 955 DeclarationName name, 956 unsigned knownArity) { 957 if (qualifier) mangleUnresolvedPrefix(qualifier, firstQualifierLookup); 958 mangleUnqualifiedName(0, name, knownArity); 959} 960 961static const FieldDecl *FindFirstNamedDataMember(const RecordDecl *RD) { 962 assert(RD->isAnonymousStructOrUnion() && 963 "Expected anonymous struct or union!"); 964 965 for (RecordDecl::field_iterator I = RD->field_begin(), E = RD->field_end(); 966 I != E; ++I) { 967 const FieldDecl *FD = *I; 968 969 if (FD->getIdentifier()) 970 return FD; 971 972 if (const RecordType *RT = FD->getType()->getAs<RecordType>()) { 973 if (const FieldDecl *NamedDataMember = 974 FindFirstNamedDataMember(RT->getDecl())) 975 return NamedDataMember; 976 } 977 } 978 979 // We didn't find a named data member. 980 return 0; 981} 982 983void CXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND, 984 DeclarationName Name, 985 unsigned KnownArity) { 986 // <unqualified-name> ::= <operator-name> 987 // ::= <ctor-dtor-name> 988 // ::= <source-name> 989 switch (Name.getNameKind()) { 990 case DeclarationName::Identifier: { 991 if (const IdentifierInfo *II = Name.getAsIdentifierInfo()) { 992 // We must avoid conflicts between internally- and externally- 993 // linked variable and function declaration names in the same TU: 994 // void test() { extern void foo(); } 995 // static void foo(); 996 // This naming convention is the same as that followed by GCC, 997 // though it shouldn't actually matter. 998 if (ND && ND->getLinkage() == InternalLinkage && 999 ND->getDeclContext()->isFileContext()) 1000 Out << 'L'; 1001 1002 mangleSourceName(II); 1003 break; 1004 } 1005 1006 // Otherwise, an anonymous entity. We must have a declaration. 1007 assert(ND && "mangling empty name without declaration"); 1008 1009 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) { 1010 if (NS->isAnonymousNamespace()) { 1011 // This is how gcc mangles these names. 1012 Out << "12_GLOBAL__N_1"; 1013 break; 1014 } 1015 } 1016 1017 if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) { 1018 // We must have an anonymous union or struct declaration. 1019 const RecordDecl *RD = 1020 cast<RecordDecl>(VD->getType()->getAs<RecordType>()->getDecl()); 1021 1022 // Itanium C++ ABI 5.1.2: 1023 // 1024 // For the purposes of mangling, the name of an anonymous union is 1025 // considered to be the name of the first named data member found by a 1026 // pre-order, depth-first, declaration-order walk of the data members of 1027 // the anonymous union. If there is no such data member (i.e., if all of 1028 // the data members in the union are unnamed), then there is no way for 1029 // a program to refer to the anonymous union, and there is therefore no 1030 // need to mangle its name. 1031 const FieldDecl *FD = FindFirstNamedDataMember(RD); 1032 1033 // It's actually possible for various reasons for us to get here 1034 // with an empty anonymous struct / union. Fortunately, it 1035 // doesn't really matter what name we generate. 1036 if (!FD) break; 1037 assert(FD->getIdentifier() && "Data member name isn't an identifier!"); 1038 1039 mangleSourceName(FD->getIdentifier()); 1040 break; 1041 } 1042 1043 // We must have an anonymous struct. 1044 const TagDecl *TD = cast<TagDecl>(ND); 1045 if (const TypedefNameDecl *D = TD->getTypedefNameForAnonDecl()) { 1046 assert(TD->getDeclContext() == D->getDeclContext() && 1047 "Typedef should not be in another decl context!"); 1048 assert(D->getDeclName().getAsIdentifierInfo() && 1049 "Typedef was not named!"); 1050 mangleSourceName(D->getDeclName().getAsIdentifierInfo()); 1051 break; 1052 } 1053 1054 // Get a unique id for the anonymous struct. 1055 uint64_t AnonStructId = Context.getAnonymousStructId(TD); 1056 1057 // Mangle it as a source name in the form 1058 // [n] $_<id> 1059 // where n is the length of the string. 1060 llvm::SmallString<8> Str; 1061 Str += "$_"; 1062 Str += llvm::utostr(AnonStructId); 1063 1064 Out << Str.size(); 1065 Out << Str.str(); 1066 break; 1067 } 1068 1069 case DeclarationName::ObjCZeroArgSelector: 1070 case DeclarationName::ObjCOneArgSelector: 1071 case DeclarationName::ObjCMultiArgSelector: 1072 llvm_unreachable("Can't mangle Objective-C selector names here!"); 1073 1074 case DeclarationName::CXXConstructorName: 1075 if (ND == Structor) 1076 // If the named decl is the C++ constructor we're mangling, use the type 1077 // we were given. 1078 mangleCXXCtorType(static_cast<CXXCtorType>(StructorType)); 1079 else 1080 // Otherwise, use the complete constructor name. This is relevant if a 1081 // class with a constructor is declared within a constructor. 1082 mangleCXXCtorType(Ctor_Complete); 1083 break; 1084 1085 case DeclarationName::CXXDestructorName: 1086 if (ND == Structor) 1087 // If the named decl is the C++ destructor we're mangling, use the type we 1088 // were given. 1089 mangleCXXDtorType(static_cast<CXXDtorType>(StructorType)); 1090 else 1091 // Otherwise, use the complete destructor name. This is relevant if a 1092 // class with a destructor is declared within a destructor. 1093 mangleCXXDtorType(Dtor_Complete); 1094 break; 1095 1096 case DeclarationName::CXXConversionFunctionName: 1097 // <operator-name> ::= cv <type> # (cast) 1098 Out << "cv"; 1099 mangleType(Name.getCXXNameType()); 1100 break; 1101 1102 case DeclarationName::CXXOperatorName: { 1103 unsigned Arity; 1104 if (ND) { 1105 Arity = cast<FunctionDecl>(ND)->getNumParams(); 1106 1107 // If we have a C++ member function, we need to include the 'this' pointer. 1108 // FIXME: This does not make sense for operators that are static, but their 1109 // names stay the same regardless of the arity (operator new for instance). 1110 if (isa<CXXMethodDecl>(ND)) 1111 Arity++; 1112 } else 1113 Arity = KnownArity; 1114 1115 mangleOperatorName(Name.getCXXOverloadedOperator(), Arity); 1116 break; 1117 } 1118 1119 case DeclarationName::CXXLiteralOperatorName: 1120 // FIXME: This mangling is not yet official. 1121 Out << "li"; 1122 mangleSourceName(Name.getCXXLiteralIdentifier()); 1123 break; 1124 1125 case DeclarationName::CXXUsingDirective: 1126 llvm_unreachable("Can't mangle a using directive name!"); 1127 } 1128} 1129 1130void CXXNameMangler::mangleSourceName(const IdentifierInfo *II) { 1131 // <source-name> ::= <positive length number> <identifier> 1132 // <number> ::= [n] <non-negative decimal integer> 1133 // <identifier> ::= <unqualified source code identifier> 1134 Out << II->getLength() << II->getName(); 1135} 1136 1137void CXXNameMangler::mangleNestedName(const NamedDecl *ND, 1138 const DeclContext *DC, 1139 bool NoFunction) { 1140 // <nested-name> 1141 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <prefix> <unqualified-name> E 1142 // ::= N [<CV-qualifiers>] [<ref-qualifier>] <template-prefix> 1143 // <template-args> E 1144 1145 Out << 'N'; 1146 if (const CXXMethodDecl *Method = dyn_cast<CXXMethodDecl>(ND)) { 1147 mangleQualifiers(Qualifiers::fromCVRMask(Method->getTypeQualifiers())); 1148 mangleRefQualifier(Method->getRefQualifier()); 1149 } 1150 1151 // Check if we have a template. 1152 const TemplateArgumentList *TemplateArgs = 0; 1153 if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) { 1154 mangleTemplatePrefix(TD); 1155 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 1156 mangleTemplateArgs(*TemplateParameters, *TemplateArgs); 1157 } 1158 else { 1159 manglePrefix(DC, NoFunction); 1160 mangleUnqualifiedName(ND); 1161 } 1162 1163 Out << 'E'; 1164} 1165void CXXNameMangler::mangleNestedName(const TemplateDecl *TD, 1166 const TemplateArgument *TemplateArgs, 1167 unsigned NumTemplateArgs) { 1168 // <nested-name> ::= N [<CV-qualifiers>] <template-prefix> <template-args> E 1169 1170 Out << 'N'; 1171 1172 mangleTemplatePrefix(TD); 1173 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 1174 mangleTemplateArgs(*TemplateParameters, TemplateArgs, NumTemplateArgs); 1175 1176 Out << 'E'; 1177} 1178 1179void CXXNameMangler::mangleLocalName(const NamedDecl *ND) { 1180 // <local-name> := Z <function encoding> E <entity name> [<discriminator>] 1181 // := Z <function encoding> E s [<discriminator>] 1182 // <discriminator> := _ <non-negative number> 1183 const DeclContext *DC = ND->getDeclContext(); 1184 if (isa<ObjCMethodDecl>(DC) && isa<FunctionDecl>(ND)) { 1185 // Don't add objc method name mangling to locally declared function 1186 mangleUnqualifiedName(ND); 1187 return; 1188 } 1189 1190 Out << 'Z'; 1191 1192 if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(DC)) { 1193 mangleObjCMethodName(MD); 1194 } else if (const CXXRecordDecl *RD = GetLocalClassDecl(ND)) { 1195 mangleFunctionEncoding(cast<FunctionDecl>(RD->getDeclContext())); 1196 Out << 'E'; 1197 1198 // Mangle the name relative to the closest enclosing function. 1199 if (ND == RD) // equality ok because RD derived from ND above 1200 mangleUnqualifiedName(ND); 1201 else 1202 mangleNestedName(ND, DC, true /*NoFunction*/); 1203 1204 unsigned disc; 1205 if (Context.getNextDiscriminator(RD, disc)) { 1206 if (disc < 10) 1207 Out << '_' << disc; 1208 else 1209 Out << "__" << disc << '_'; 1210 } 1211 1212 return; 1213 } 1214 else 1215 mangleFunctionEncoding(cast<FunctionDecl>(DC)); 1216 1217 Out << 'E'; 1218 mangleUnqualifiedName(ND); 1219} 1220 1221void CXXNameMangler::manglePrefix(NestedNameSpecifier *qualifier) { 1222 switch (qualifier->getKind()) { 1223 case NestedNameSpecifier::Global: 1224 // nothing 1225 return; 1226 1227 case NestedNameSpecifier::Namespace: 1228 mangleName(qualifier->getAsNamespace()); 1229 return; 1230 1231 case NestedNameSpecifier::NamespaceAlias: 1232 mangleName(qualifier->getAsNamespaceAlias()->getNamespace()); 1233 return; 1234 1235 case NestedNameSpecifier::TypeSpec: 1236 case NestedNameSpecifier::TypeSpecWithTemplate: 1237 manglePrefix(QualType(qualifier->getAsType(), 0)); 1238 return; 1239 1240 case NestedNameSpecifier::Identifier: 1241 // Member expressions can have these without prefixes, but that 1242 // should end up in mangleUnresolvedPrefix instead. 1243 assert(qualifier->getPrefix()); 1244 manglePrefix(qualifier->getPrefix()); 1245 1246 mangleSourceName(qualifier->getAsIdentifier()); 1247 return; 1248 } 1249 1250 llvm_unreachable("unexpected nested name specifier"); 1251} 1252 1253void CXXNameMangler::manglePrefix(const DeclContext *DC, bool NoFunction) { 1254 // <prefix> ::= <prefix> <unqualified-name> 1255 // ::= <template-prefix> <template-args> 1256 // ::= <template-param> 1257 // ::= # empty 1258 // ::= <substitution> 1259 1260 while (isa<LinkageSpecDecl>(DC)) 1261 DC = DC->getParent(); 1262 1263 if (DC->isTranslationUnit()) 1264 return; 1265 1266 if (const BlockDecl *Block = dyn_cast<BlockDecl>(DC)) { 1267 manglePrefix(DC->getParent(), NoFunction); 1268 llvm::SmallString<64> Name; 1269 llvm::raw_svector_ostream NameStream(Name); 1270 Context.mangleBlock(Block, NameStream); 1271 NameStream.flush(); 1272 Out << Name.size() << Name; 1273 return; 1274 } 1275 1276 if (mangleSubstitution(cast<NamedDecl>(DC))) 1277 return; 1278 1279 // Check if we have a template. 1280 const TemplateArgumentList *TemplateArgs = 0; 1281 if (const TemplateDecl *TD = isTemplate(cast<NamedDecl>(DC), TemplateArgs)) { 1282 mangleTemplatePrefix(TD); 1283 TemplateParameterList *TemplateParameters = TD->getTemplateParameters(); 1284 mangleTemplateArgs(*TemplateParameters, *TemplateArgs); 1285 } 1286 else if(NoFunction && (isa<FunctionDecl>(DC) || isa<ObjCMethodDecl>(DC))) 1287 return; 1288 else if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(DC)) 1289 mangleObjCMethodName(Method); 1290 else { 1291 manglePrefix(DC->getParent(), NoFunction); 1292 mangleUnqualifiedName(cast<NamedDecl>(DC)); 1293 } 1294 1295 addSubstitution(cast<NamedDecl>(DC)); 1296} 1297 1298void CXXNameMangler::mangleTemplatePrefix(TemplateName Template) { 1299 // <template-prefix> ::= <prefix> <template unqualified-name> 1300 // ::= <template-param> 1301 // ::= <substitution> 1302 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 1303 return mangleTemplatePrefix(TD); 1304 1305 if (QualifiedTemplateName *Qualified = Template.getAsQualifiedTemplateName()) 1306 manglePrefix(Qualified->getQualifier()); 1307 1308 if (OverloadedTemplateStorage *Overloaded 1309 = Template.getAsOverloadedTemplate()) { 1310 mangleUnqualifiedName(0, (*Overloaded->begin())->getDeclName(), 1311 UnknownArity); 1312 return; 1313 } 1314 1315 DependentTemplateName *Dependent = Template.getAsDependentTemplateName(); 1316 assert(Dependent && "Unknown template name kind?"); 1317 manglePrefix(Dependent->getQualifier()); 1318 mangleUnscopedTemplateName(Template); 1319} 1320 1321void CXXNameMangler::mangleTemplatePrefix(const TemplateDecl *ND) { 1322 // <template-prefix> ::= <prefix> <template unqualified-name> 1323 // ::= <template-param> 1324 // ::= <substitution> 1325 // <template-template-param> ::= <template-param> 1326 // <substitution> 1327 1328 if (mangleSubstitution(ND)) 1329 return; 1330 1331 // <template-template-param> ::= <template-param> 1332 if (const TemplateTemplateParmDecl *TTP 1333 = dyn_cast<TemplateTemplateParmDecl>(ND)) { 1334 mangleTemplateParameter(TTP->getIndex()); 1335 return; 1336 } 1337 1338 manglePrefix(ND->getDeclContext()); 1339 mangleUnqualifiedName(ND->getTemplatedDecl()); 1340 addSubstitution(ND); 1341} 1342 1343/// Mangles a template name under the production <type>. Required for 1344/// template template arguments. 1345/// <type> ::= <class-enum-type> 1346/// ::= <template-param> 1347/// ::= <substitution> 1348void CXXNameMangler::mangleType(TemplateName TN) { 1349 if (mangleSubstitution(TN)) 1350 return; 1351 1352 TemplateDecl *TD = 0; 1353 1354 switch (TN.getKind()) { 1355 case TemplateName::QualifiedTemplate: 1356 TD = TN.getAsQualifiedTemplateName()->getTemplateDecl(); 1357 goto HaveDecl; 1358 1359 case TemplateName::Template: 1360 TD = TN.getAsTemplateDecl(); 1361 goto HaveDecl; 1362 1363 HaveDecl: 1364 if (isa<TemplateTemplateParmDecl>(TD)) 1365 mangleTemplateParameter(cast<TemplateTemplateParmDecl>(TD)->getIndex()); 1366 else 1367 mangleName(TD); 1368 break; 1369 1370 case TemplateName::OverloadedTemplate: 1371 llvm_unreachable("can't mangle an overloaded template name as a <type>"); 1372 break; 1373 1374 case TemplateName::DependentTemplate: { 1375 const DependentTemplateName *Dependent = TN.getAsDependentTemplateName(); 1376 assert(Dependent->isIdentifier()); 1377 1378 // <class-enum-type> ::= <name> 1379 // <name> ::= <nested-name> 1380 mangleUnresolvedPrefix(Dependent->getQualifier(), 0); 1381 mangleSourceName(Dependent->getIdentifier()); 1382 break; 1383 } 1384 1385 case TemplateName::SubstTemplateTemplateParm: { 1386 // Substituted template parameters are mangled as the substituted 1387 // template. This will check for the substitution twice, which is 1388 // fine, but we have to return early so that we don't try to *add* 1389 // the substitution twice. 1390 SubstTemplateTemplateParmStorage *subst 1391 = TN.getAsSubstTemplateTemplateParm(); 1392 mangleType(subst->getReplacement()); 1393 return; 1394 } 1395 1396 case TemplateName::SubstTemplateTemplateParmPack: { 1397 // FIXME: not clear how to mangle this! 1398 // template <template <class> class T...> class A { 1399 // template <template <class> class U...> void foo(B<T,U> x...); 1400 // }; 1401 Out << "_SUBSTPACK_"; 1402 break; 1403 } 1404 } 1405 1406 addSubstitution(TN); 1407} 1408 1409void 1410CXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO, unsigned Arity) { 1411 switch (OO) { 1412 // <operator-name> ::= nw # new 1413 case OO_New: Out << "nw"; break; 1414 // ::= na # new[] 1415 case OO_Array_New: Out << "na"; break; 1416 // ::= dl # delete 1417 case OO_Delete: Out << "dl"; break; 1418 // ::= da # delete[] 1419 case OO_Array_Delete: Out << "da"; break; 1420 // ::= ps # + (unary) 1421 // ::= pl # + (binary or unknown) 1422 case OO_Plus: 1423 Out << (Arity == 1? "ps" : "pl"); break; 1424 // ::= ng # - (unary) 1425 // ::= mi # - (binary or unknown) 1426 case OO_Minus: 1427 Out << (Arity == 1? "ng" : "mi"); break; 1428 // ::= ad # & (unary) 1429 // ::= an # & (binary or unknown) 1430 case OO_Amp: 1431 Out << (Arity == 1? "ad" : "an"); break; 1432 // ::= de # * (unary) 1433 // ::= ml # * (binary or unknown) 1434 case OO_Star: 1435 // Use binary when unknown. 1436 Out << (Arity == 1? "de" : "ml"); break; 1437 // ::= co # ~ 1438 case OO_Tilde: Out << "co"; break; 1439 // ::= dv # / 1440 case OO_Slash: Out << "dv"; break; 1441 // ::= rm # % 1442 case OO_Percent: Out << "rm"; break; 1443 // ::= or # | 1444 case OO_Pipe: Out << "or"; break; 1445 // ::= eo # ^ 1446 case OO_Caret: Out << "eo"; break; 1447 // ::= aS # = 1448 case OO_Equal: Out << "aS"; break; 1449 // ::= pL # += 1450 case OO_PlusEqual: Out << "pL"; break; 1451 // ::= mI # -= 1452 case OO_MinusEqual: Out << "mI"; break; 1453 // ::= mL # *= 1454 case OO_StarEqual: Out << "mL"; break; 1455 // ::= dV # /= 1456 case OO_SlashEqual: Out << "dV"; break; 1457 // ::= rM # %= 1458 case OO_PercentEqual: Out << "rM"; break; 1459 // ::= aN # &= 1460 case OO_AmpEqual: Out << "aN"; break; 1461 // ::= oR # |= 1462 case OO_PipeEqual: Out << "oR"; break; 1463 // ::= eO # ^= 1464 case OO_CaretEqual: Out << "eO"; break; 1465 // ::= ls # << 1466 case OO_LessLess: Out << "ls"; break; 1467 // ::= rs # >> 1468 case OO_GreaterGreater: Out << "rs"; break; 1469 // ::= lS # <<= 1470 case OO_LessLessEqual: Out << "lS"; break; 1471 // ::= rS # >>= 1472 case OO_GreaterGreaterEqual: Out << "rS"; break; 1473 // ::= eq # == 1474 case OO_EqualEqual: Out << "eq"; break; 1475 // ::= ne # != 1476 case OO_ExclaimEqual: Out << "ne"; break; 1477 // ::= lt # < 1478 case OO_Less: Out << "lt"; break; 1479 // ::= gt # > 1480 case OO_Greater: Out << "gt"; break; 1481 // ::= le # <= 1482 case OO_LessEqual: Out << "le"; break; 1483 // ::= ge # >= 1484 case OO_GreaterEqual: Out << "ge"; break; 1485 // ::= nt # ! 1486 case OO_Exclaim: Out << "nt"; break; 1487 // ::= aa # && 1488 case OO_AmpAmp: Out << "aa"; break; 1489 // ::= oo # || 1490 case OO_PipePipe: Out << "oo"; break; 1491 // ::= pp # ++ 1492 case OO_PlusPlus: Out << "pp"; break; 1493 // ::= mm # -- 1494 case OO_MinusMinus: Out << "mm"; break; 1495 // ::= cm # , 1496 case OO_Comma: Out << "cm"; break; 1497 // ::= pm # ->* 1498 case OO_ArrowStar: Out << "pm"; break; 1499 // ::= pt # -> 1500 case OO_Arrow: Out << "pt"; break; 1501 // ::= cl # () 1502 case OO_Call: Out << "cl"; break; 1503 // ::= ix # [] 1504 case OO_Subscript: Out << "ix"; break; 1505 1506 // ::= qu # ? 1507 // The conditional operator can't be overloaded, but we still handle it when 1508 // mangling expressions. 1509 case OO_Conditional: Out << "qu"; break; 1510 1511 case OO_None: 1512 case NUM_OVERLOADED_OPERATORS: 1513 llvm_unreachable("Not an overloaded operator"); 1514 } 1515} 1516 1517void CXXNameMangler::mangleQualifiers(Qualifiers Quals) { 1518 // <CV-qualifiers> ::= [r] [V] [K] # restrict (C99), volatile, const 1519 if (Quals.hasRestrict()) 1520 Out << 'r'; 1521 if (Quals.hasVolatile()) 1522 Out << 'V'; 1523 if (Quals.hasConst()) 1524 Out << 'K'; 1525 1526 if (Quals.hasAddressSpace()) { 1527 // Extension: 1528 // 1529 // <type> ::= U <address-space-number> 1530 // 1531 // where <address-space-number> is a source name consisting of 'AS' 1532 // followed by the address space <number>. 1533 llvm::SmallString<64> ASString; 1534 ASString = "AS" + llvm::utostr_32(Quals.getAddressSpace()); 1535 Out << 'U' << ASString.size() << ASString; 1536 } 1537 1538 StringRef LifetimeName; 1539 switch (Quals.getObjCLifetime()) { 1540 // Objective-C ARC Extension: 1541 // 1542 // <type> ::= U "__strong" 1543 // <type> ::= U "__weak" 1544 // <type> ::= U "__autoreleasing" 1545 case Qualifiers::OCL_None: 1546 break; 1547 1548 case Qualifiers::OCL_Weak: 1549 LifetimeName = "__weak"; 1550 break; 1551 1552 case Qualifiers::OCL_Strong: 1553 LifetimeName = "__strong"; 1554 break; 1555 1556 case Qualifiers::OCL_Autoreleasing: 1557 LifetimeName = "__autoreleasing"; 1558 break; 1559 1560 case Qualifiers::OCL_ExplicitNone: 1561 // The __unsafe_unretained qualifier is *not* mangled, so that 1562 // __unsafe_unretained types in ARC produce the same manglings as the 1563 // equivalent (but, naturally, unqualified) types in non-ARC, providing 1564 // better ABI compatibility. 1565 // 1566 // It's safe to do this because unqualified 'id' won't show up 1567 // in any type signatures that need to be mangled. 1568 break; 1569 } 1570 if (!LifetimeName.empty()) 1571 Out << 'U' << LifetimeName.size() << LifetimeName; 1572} 1573 1574void CXXNameMangler::mangleRefQualifier(RefQualifierKind RefQualifier) { 1575 // <ref-qualifier> ::= R # lvalue reference 1576 // ::= O # rvalue-reference 1577 // Proposal to Itanium C++ ABI list on 1/26/11 1578 switch (RefQualifier) { 1579 case RQ_None: 1580 break; 1581 1582 case RQ_LValue: 1583 Out << 'R'; 1584 break; 1585 1586 case RQ_RValue: 1587 Out << 'O'; 1588 break; 1589 } 1590} 1591 1592void CXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) { 1593 Context.mangleObjCMethodName(MD, Out); 1594} 1595 1596void CXXNameMangler::mangleType(QualType T) { 1597 // If our type is instantiation-dependent but not dependent, we mangle 1598 // it as it was written in the source, removing any top-level sugar. 1599 // Otherwise, use the canonical type. 1600 // 1601 // FIXME: This is an approximation of the instantiation-dependent name 1602 // mangling rules, since we should really be using the type as written and 1603 // augmented via semantic analysis (i.e., with implicit conversions and 1604 // default template arguments) for any instantiation-dependent type. 1605 // Unfortunately, that requires several changes to our AST: 1606 // - Instantiation-dependent TemplateSpecializationTypes will need to be 1607 // uniqued, so that we can handle substitutions properly 1608 // - Default template arguments will need to be represented in the 1609 // TemplateSpecializationType, since they need to be mangled even though 1610 // they aren't written. 1611 // - Conversions on non-type template arguments need to be expressed, since 1612 // they can affect the mangling of sizeof/alignof. 1613 if (!T->isInstantiationDependentType() || T->isDependentType()) 1614 T = T.getCanonicalType(); 1615 else { 1616 // Desugar any types that are purely sugar. 1617 do { 1618 // Don't desugar through template specialization types that aren't 1619 // type aliases. We need to mangle the template arguments as written. 1620 if (const TemplateSpecializationType *TST 1621 = dyn_cast<TemplateSpecializationType>(T)) 1622 if (!TST->isTypeAlias()) 1623 break; 1624 1625 QualType Desugared 1626 = T.getSingleStepDesugaredType(Context.getASTContext()); 1627 if (Desugared == T) 1628 break; 1629 1630 T = Desugared; 1631 } while (true); 1632 } 1633 SplitQualType split = T.split(); 1634 Qualifiers quals = split.second; 1635 const Type *ty = split.first; 1636 1637 bool isSubstitutable = quals || !isa<BuiltinType>(T); 1638 if (isSubstitutable && mangleSubstitution(T)) 1639 return; 1640 1641 // If we're mangling a qualified array type, push the qualifiers to 1642 // the element type. 1643 if (quals && isa<ArrayType>(T)) { 1644 ty = Context.getASTContext().getAsArrayType(T); 1645 quals = Qualifiers(); 1646 1647 // Note that we don't update T: we want to add the 1648 // substitution at the original type. 1649 } 1650 1651 if (quals) { 1652 mangleQualifiers(quals); 1653 // Recurse: even if the qualified type isn't yet substitutable, 1654 // the unqualified type might be. 1655 mangleType(QualType(ty, 0)); 1656 } else { 1657 switch (ty->getTypeClass()) { 1658#define ABSTRACT_TYPE(CLASS, PARENT) 1659#define NON_CANONICAL_TYPE(CLASS, PARENT) \ 1660 case Type::CLASS: \ 1661 llvm_unreachable("can't mangle non-canonical type " #CLASS "Type"); \ 1662 return; 1663#define TYPE(CLASS, PARENT) \ 1664 case Type::CLASS: \ 1665 mangleType(static_cast<const CLASS##Type*>(ty)); \ 1666 break; 1667#include "clang/AST/TypeNodes.def" 1668 } 1669 } 1670 1671 // Add the substitution. 1672 if (isSubstitutable) 1673 addSubstitution(T); 1674} 1675 1676void CXXNameMangler::mangleNameOrStandardSubstitution(const NamedDecl *ND) { 1677 if (!mangleStandardSubstitution(ND)) 1678 mangleName(ND); 1679} 1680 1681void CXXNameMangler::mangleType(const BuiltinType *T) { 1682 // <type> ::= <builtin-type> 1683 // <builtin-type> ::= v # void 1684 // ::= w # wchar_t 1685 // ::= b # bool 1686 // ::= c # char 1687 // ::= a # signed char 1688 // ::= h # unsigned char 1689 // ::= s # short 1690 // ::= t # unsigned short 1691 // ::= i # int 1692 // ::= j # unsigned int 1693 // ::= l # long 1694 // ::= m # unsigned long 1695 // ::= x # long long, __int64 1696 // ::= y # unsigned long long, __int64 1697 // ::= n # __int128 1698 // UNSUPPORTED: ::= o # unsigned __int128 1699 // ::= f # float 1700 // ::= d # double 1701 // ::= e # long double, __float80 1702 // UNSUPPORTED: ::= g # __float128 1703 // UNSUPPORTED: ::= Dd # IEEE 754r decimal floating point (64 bits) 1704 // UNSUPPORTED: ::= De # IEEE 754r decimal floating point (128 bits) 1705 // UNSUPPORTED: ::= Df # IEEE 754r decimal floating point (32 bits) 1706 // UNSUPPORTED: ::= Dh # IEEE 754r half-precision floating point (16 bits) 1707 // ::= Di # char32_t 1708 // ::= Ds # char16_t 1709 // ::= Dn # std::nullptr_t (i.e., decltype(nullptr)) 1710 // ::= u <source-name> # vendor extended type 1711 switch (T->getKind()) { 1712 case BuiltinType::Void: Out << 'v'; break; 1713 case BuiltinType::Bool: Out << 'b'; break; 1714 case BuiltinType::Char_U: case BuiltinType::Char_S: Out << 'c'; break; 1715 case BuiltinType::UChar: Out << 'h'; break; 1716 case BuiltinType::UShort: Out << 't'; break; 1717 case BuiltinType::UInt: Out << 'j'; break; 1718 case BuiltinType::ULong: Out << 'm'; break; 1719 case BuiltinType::ULongLong: Out << 'y'; break; 1720 case BuiltinType::UInt128: Out << 'o'; break; 1721 case BuiltinType::SChar: Out << 'a'; break; 1722 case BuiltinType::WChar_S: 1723 case BuiltinType::WChar_U: Out << 'w'; break; 1724 case BuiltinType::Char16: Out << "Ds"; break; 1725 case BuiltinType::Char32: Out << "Di"; break; 1726 case BuiltinType::Short: Out << 's'; break; 1727 case BuiltinType::Int: Out << 'i'; break; 1728 case BuiltinType::Long: Out << 'l'; break; 1729 case BuiltinType::LongLong: Out << 'x'; break; 1730 case BuiltinType::Int128: Out << 'n'; break; 1731 case BuiltinType::Float: Out << 'f'; break; 1732 case BuiltinType::Double: Out << 'd'; break; 1733 case BuiltinType::LongDouble: Out << 'e'; break; 1734 case BuiltinType::NullPtr: Out << "Dn"; break; 1735 1736 case BuiltinType::Overload: 1737 case BuiltinType::Dependent: 1738 case BuiltinType::BoundMember: 1739 case BuiltinType::UnknownAny: 1740 llvm_unreachable("mangling a placeholder type"); 1741 break; 1742 case BuiltinType::ObjCId: Out << "11objc_object"; break; 1743 case BuiltinType::ObjCClass: Out << "10objc_class"; break; 1744 case BuiltinType::ObjCSel: Out << "13objc_selector"; break; 1745 } 1746} 1747 1748// <type> ::= <function-type> 1749// <function-type> ::= F [Y] <bare-function-type> E 1750void CXXNameMangler::mangleType(const FunctionProtoType *T) { 1751 Out << 'F'; 1752 // FIXME: We don't have enough information in the AST to produce the 'Y' 1753 // encoding for extern "C" function types. 1754 mangleBareFunctionType(T, /*MangleReturnType=*/true); 1755 Out << 'E'; 1756} 1757void CXXNameMangler::mangleType(const FunctionNoProtoType *T) { 1758 llvm_unreachable("Can't mangle K&R function prototypes"); 1759} 1760void CXXNameMangler::mangleBareFunctionType(const FunctionType *T, 1761 bool MangleReturnType) { 1762 // We should never be mangling something without a prototype. 1763 const FunctionProtoType *Proto = cast<FunctionProtoType>(T); 1764 1765 // Record that we're in a function type. See mangleFunctionParam 1766 // for details on what we're trying to achieve here. 1767 FunctionTypeDepthState saved = FunctionTypeDepth.push(); 1768 1769 // <bare-function-type> ::= <signature type>+ 1770 if (MangleReturnType) { 1771 FunctionTypeDepth.enterResultType(); 1772 mangleType(Proto->getResultType()); 1773 FunctionTypeDepth.leaveResultType(); 1774 } 1775 1776 if (Proto->getNumArgs() == 0 && !Proto->isVariadic()) { 1777 // <builtin-type> ::= v # void 1778 Out << 'v'; 1779 1780 FunctionTypeDepth.pop(saved); 1781 return; 1782 } 1783 1784 for (FunctionProtoType::arg_type_iterator Arg = Proto->arg_type_begin(), 1785 ArgEnd = Proto->arg_type_end(); 1786 Arg != ArgEnd; ++Arg) 1787 mangleType(Context.getASTContext().getSignatureParameterType(*Arg)); 1788 1789 FunctionTypeDepth.pop(saved); 1790 1791 // <builtin-type> ::= z # ellipsis 1792 if (Proto->isVariadic()) 1793 Out << 'z'; 1794} 1795 1796// <type> ::= <class-enum-type> 1797// <class-enum-type> ::= <name> 1798void CXXNameMangler::mangleType(const UnresolvedUsingType *T) { 1799 mangleName(T->getDecl()); 1800} 1801 1802// <type> ::= <class-enum-type> 1803// <class-enum-type> ::= <name> 1804void CXXNameMangler::mangleType(const EnumType *T) { 1805 mangleType(static_cast<const TagType*>(T)); 1806} 1807void CXXNameMangler::mangleType(const RecordType *T) { 1808 mangleType(static_cast<const TagType*>(T)); 1809} 1810void CXXNameMangler::mangleType(const TagType *T) { 1811 mangleName(T->getDecl()); 1812} 1813 1814// <type> ::= <array-type> 1815// <array-type> ::= A <positive dimension number> _ <element type> 1816// ::= A [<dimension expression>] _ <element type> 1817void CXXNameMangler::mangleType(const ConstantArrayType *T) { 1818 Out << 'A' << T->getSize() << '_'; 1819 mangleType(T->getElementType()); 1820} 1821void CXXNameMangler::mangleType(const VariableArrayType *T) { 1822 Out << 'A'; 1823 // decayed vla types (size 0) will just be skipped. 1824 if (T->getSizeExpr()) 1825 mangleExpression(T->getSizeExpr()); 1826 Out << '_'; 1827 mangleType(T->getElementType()); 1828} 1829void CXXNameMangler::mangleType(const DependentSizedArrayType *T) { 1830 Out << 'A'; 1831 mangleExpression(T->getSizeExpr()); 1832 Out << '_'; 1833 mangleType(T->getElementType()); 1834} 1835void CXXNameMangler::mangleType(const IncompleteArrayType *T) { 1836 Out << "A_"; 1837 mangleType(T->getElementType()); 1838} 1839 1840// <type> ::= <pointer-to-member-type> 1841// <pointer-to-member-type> ::= M <class type> <member type> 1842void CXXNameMangler::mangleType(const MemberPointerType *T) { 1843 Out << 'M'; 1844 mangleType(QualType(T->getClass(), 0)); 1845 QualType PointeeType = T->getPointeeType(); 1846 if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(PointeeType)) { 1847 mangleQualifiers(Qualifiers::fromCVRMask(FPT->getTypeQuals())); 1848 mangleRefQualifier(FPT->getRefQualifier()); 1849 mangleType(FPT); 1850 1851 // Itanium C++ ABI 5.1.8: 1852 // 1853 // The type of a non-static member function is considered to be different, 1854 // for the purposes of substitution, from the type of a namespace-scope or 1855 // static member function whose type appears similar. The types of two 1856 // non-static member functions are considered to be different, for the 1857 // purposes of substitution, if the functions are members of different 1858 // classes. In other words, for the purposes of substitution, the class of 1859 // which the function is a member is considered part of the type of 1860 // function. 1861 1862 // We increment the SeqID here to emulate adding an entry to the 1863 // substitution table. We can't actually add it because we don't want this 1864 // particular function type to be substituted. 1865 ++SeqID; 1866 } else 1867 mangleType(PointeeType); 1868} 1869 1870// <type> ::= <template-param> 1871void CXXNameMangler::mangleType(const TemplateTypeParmType *T) { 1872 mangleTemplateParameter(T->getIndex()); 1873} 1874 1875// <type> ::= <template-param> 1876void CXXNameMangler::mangleType(const SubstTemplateTypeParmPackType *T) { 1877 // FIXME: not clear how to mangle this! 1878 // template <class T...> class A { 1879 // template <class U...> void foo(T(*)(U) x...); 1880 // }; 1881 Out << "_SUBSTPACK_"; 1882} 1883 1884// <type> ::= P <type> # pointer-to 1885void CXXNameMangler::mangleType(const PointerType *T) { 1886 Out << 'P'; 1887 mangleType(T->getPointeeType()); 1888} 1889void CXXNameMangler::mangleType(const ObjCObjectPointerType *T) { 1890 Out << 'P'; 1891 mangleType(T->getPointeeType()); 1892} 1893 1894// <type> ::= R <type> # reference-to 1895void CXXNameMangler::mangleType(const LValueReferenceType *T) { 1896 Out << 'R'; 1897 mangleType(T->getPointeeType()); 1898} 1899 1900// <type> ::= O <type> # rvalue reference-to (C++0x) 1901void CXXNameMangler::mangleType(const RValueReferenceType *T) { 1902 Out << 'O'; 1903 mangleType(T->getPointeeType()); 1904} 1905 1906// <type> ::= C <type> # complex pair (C 2000) 1907void CXXNameMangler::mangleType(const ComplexType *T) { 1908 Out << 'C'; 1909 mangleType(T->getElementType()); 1910} 1911 1912// ARM's ABI for Neon vector types specifies that they should be mangled as 1913// if they are structs (to match ARM's initial implementation). The 1914// vector type must be one of the special types predefined by ARM. 1915void CXXNameMangler::mangleNeonVectorType(const VectorType *T) { 1916 QualType EltType = T->getElementType(); 1917 assert(EltType->isBuiltinType() && "Neon vector element not a BuiltinType"); 1918 const char *EltName = 0; 1919 if (T->getVectorKind() == VectorType::NeonPolyVector) { 1920 switch (cast<BuiltinType>(EltType)->getKind()) { 1921 case BuiltinType::SChar: EltName = "poly8_t"; break; 1922 case BuiltinType::Short: EltName = "poly16_t"; break; 1923 default: llvm_unreachable("unexpected Neon polynomial vector element type"); 1924 } 1925 } else { 1926 switch (cast<BuiltinType>(EltType)->getKind()) { 1927 case BuiltinType::SChar: EltName = "int8_t"; break; 1928 case BuiltinType::UChar: EltName = "uint8_t"; break; 1929 case BuiltinType::Short: EltName = "int16_t"; break; 1930 case BuiltinType::UShort: EltName = "uint16_t"; break; 1931 case BuiltinType::Int: EltName = "int32_t"; break; 1932 case BuiltinType::UInt: EltName = "uint32_t"; break; 1933 case BuiltinType::LongLong: EltName = "int64_t"; break; 1934 case BuiltinType::ULongLong: EltName = "uint64_t"; break; 1935 case BuiltinType::Float: EltName = "float32_t"; break; 1936 default: llvm_unreachable("unexpected Neon vector element type"); 1937 } 1938 } 1939 const char *BaseName = 0; 1940 unsigned BitSize = (T->getNumElements() * 1941 getASTContext().getTypeSize(EltType)); 1942 if (BitSize == 64) 1943 BaseName = "__simd64_"; 1944 else { 1945 assert(BitSize == 128 && "Neon vector type not 64 or 128 bits"); 1946 BaseName = "__simd128_"; 1947 } 1948 Out << strlen(BaseName) + strlen(EltName); 1949 Out << BaseName << EltName; 1950} 1951 1952// GNU extension: vector types 1953// <type> ::= <vector-type> 1954// <vector-type> ::= Dv <positive dimension number> _ 1955// <extended element type> 1956// ::= Dv [<dimension expression>] _ <element type> 1957// <extended element type> ::= <element type> 1958// ::= p # AltiVec vector pixel 1959void CXXNameMangler::mangleType(const VectorType *T) { 1960 if ((T->getVectorKind() == VectorType::NeonVector || 1961 T->getVectorKind() == VectorType::NeonPolyVector)) { 1962 mangleNeonVectorType(T); 1963 return; 1964 } 1965 Out << "Dv" << T->getNumElements() << '_'; 1966 if (T->getVectorKind() == VectorType::AltiVecPixel) 1967 Out << 'p'; 1968 else if (T->getVectorKind() == VectorType::AltiVecBool) 1969 Out << 'b'; 1970 else 1971 mangleType(T->getElementType()); 1972} 1973void CXXNameMangler::mangleType(const ExtVectorType *T) { 1974 mangleType(static_cast<const VectorType*>(T)); 1975} 1976void CXXNameMangler::mangleType(const DependentSizedExtVectorType *T) { 1977 Out << "Dv"; 1978 mangleExpression(T->getSizeExpr()); 1979 Out << '_'; 1980 mangleType(T->getElementType()); 1981} 1982 1983void CXXNameMangler::mangleType(const PackExpansionType *T) { 1984 // <type> ::= Dp <type> # pack expansion (C++0x) 1985 Out << "Dp"; 1986 mangleType(T->getPattern()); 1987} 1988 1989void CXXNameMangler::mangleType(const ObjCInterfaceType *T) { 1990 mangleSourceName(T->getDecl()->getIdentifier()); 1991} 1992 1993void CXXNameMangler::mangleType(const ObjCObjectType *T) { 1994 // We don't allow overloading by different protocol qualification, 1995 // so mangling them isn't necessary. 1996 mangleType(T->getBaseType()); 1997} 1998 1999void CXXNameMangler::mangleType(const BlockPointerType *T) { 2000 Out << "U13block_pointer"; 2001 mangleType(T->getPointeeType()); 2002} 2003 2004void CXXNameMangler::mangleType(const InjectedClassNameType *T) { 2005 // Mangle injected class name types as if the user had written the 2006 // specialization out fully. It may not actually be possible to see 2007 // this mangling, though. 2008 mangleType(T->getInjectedSpecializationType()); 2009} 2010 2011void CXXNameMangler::mangleType(const TemplateSpecializationType *T) { 2012 if (TemplateDecl *TD = T->getTemplateName().getAsTemplateDecl()) { 2013 mangleName(TD, T->getArgs(), T->getNumArgs()); 2014 } else { 2015 if (mangleSubstitution(QualType(T, 0))) 2016 return; 2017 2018 mangleTemplatePrefix(T->getTemplateName()); 2019 2020 // FIXME: GCC does not appear to mangle the template arguments when 2021 // the template in question is a dependent template name. Should we 2022 // emulate that badness? 2023 mangleTemplateArgs(T->getTemplateName(), T->getArgs(), T->getNumArgs()); 2024 addSubstitution(QualType(T, 0)); 2025 } 2026} 2027 2028void CXXNameMangler::mangleType(const DependentNameType *T) { 2029 // Typename types are always nested 2030 Out << 'N'; 2031 manglePrefix(T->getQualifier()); 2032 mangleSourceName(T->getIdentifier()); 2033 Out << 'E'; 2034} 2035 2036void CXXNameMangler::mangleType(const DependentTemplateSpecializationType *T) { 2037 // Dependently-scoped template types are nested if they have a prefix. 2038 Out << 'N'; 2039 2040 // TODO: avoid making this TemplateName. 2041 TemplateName Prefix = 2042 getASTContext().getDependentTemplateName(T->getQualifier(), 2043 T->getIdentifier()); 2044 mangleTemplatePrefix(Prefix); 2045 2046 // FIXME: GCC does not appear to mangle the template arguments when 2047 // the template in question is a dependent template name. Should we 2048 // emulate that badness? 2049 mangleTemplateArgs(Prefix, T->getArgs(), T->getNumArgs()); 2050 Out << 'E'; 2051} 2052 2053void CXXNameMangler::mangleType(const TypeOfType *T) { 2054 // FIXME: this is pretty unsatisfactory, but there isn't an obvious 2055 // "extension with parameters" mangling. 2056 Out << "u6typeof"; 2057} 2058 2059void CXXNameMangler::mangleType(const TypeOfExprType *T) { 2060 // FIXME: this is pretty unsatisfactory, but there isn't an obvious 2061 // "extension with parameters" mangling. 2062 Out << "u6typeof"; 2063} 2064 2065void CXXNameMangler::mangleType(const DecltypeType *T) { 2066 Expr *E = T->getUnderlyingExpr(); 2067 2068 // type ::= Dt <expression> E # decltype of an id-expression 2069 // # or class member access 2070 // ::= DT <expression> E # decltype of an expression 2071 2072 // This purports to be an exhaustive list of id-expressions and 2073 // class member accesses. Note that we do not ignore parentheses; 2074 // parentheses change the semantics of decltype for these 2075 // expressions (and cause the mangler to use the other form). 2076 if (isa<DeclRefExpr>(E) || 2077 isa<MemberExpr>(E) || 2078 isa<UnresolvedLookupExpr>(E) || 2079 isa<DependentScopeDeclRefExpr>(E) || 2080 isa<CXXDependentScopeMemberExpr>(E) || 2081 isa<UnresolvedMemberExpr>(E)) 2082 Out << "Dt"; 2083 else 2084 Out << "DT"; 2085 mangleExpression(E); 2086 Out << 'E'; 2087} 2088 2089void CXXNameMangler::mangleType(const UnaryTransformType *T) { 2090 // If this is dependent, we need to record that. If not, we simply 2091 // mangle it as the underlying type since they are equivalent. 2092 if (T->isDependentType()) { 2093 Out << 'U'; 2094 2095 switch (T->getUTTKind()) { 2096 case UnaryTransformType::EnumUnderlyingType: 2097 Out << "3eut"; 2098 break; 2099 } 2100 } 2101 2102 mangleType(T->getUnderlyingType()); 2103} 2104 2105void CXXNameMangler::mangleType(const AutoType *T) { 2106 QualType D = T->getDeducedType(); 2107 // <builtin-type> ::= Da # dependent auto 2108 if (D.isNull()) 2109 Out << "Da"; 2110 else 2111 mangleType(D); 2112} 2113 2114void CXXNameMangler::mangleIntegerLiteral(QualType T, 2115 const llvm::APSInt &Value) { 2116 // <expr-primary> ::= L <type> <value number> E # integer literal 2117 Out << 'L'; 2118 2119 mangleType(T); 2120 if (T->isBooleanType()) { 2121 // Boolean values are encoded as 0/1. 2122 Out << (Value.getBoolValue() ? '1' : '0'); 2123 } else { 2124 mangleNumber(Value); 2125 } 2126 Out << 'E'; 2127 2128} 2129 2130/// Mangles a member expression. Implicit accesses are not handled, 2131/// but that should be okay, because you shouldn't be able to 2132/// make an implicit access in a function template declaration. 2133void CXXNameMangler::mangleMemberExpr(const Expr *base, 2134 bool isArrow, 2135 NestedNameSpecifier *qualifier, 2136 NamedDecl *firstQualifierLookup, 2137 DeclarationName member, 2138 unsigned arity) { 2139 // <expression> ::= dt <expression> <unresolved-name> 2140 // ::= pt <expression> <unresolved-name> 2141 Out << (isArrow ? "pt" : "dt"); 2142 mangleExpression(base); 2143 mangleUnresolvedName(qualifier, firstQualifierLookup, member, arity); 2144} 2145 2146/// Look at the callee of the given call expression and determine if 2147/// it's a parenthesized id-expression which would have triggered ADL 2148/// otherwise. 2149static bool isParenthesizedADLCallee(const CallExpr *call) { 2150 const Expr *callee = call->getCallee(); 2151 const Expr *fn = callee->IgnoreParens(); 2152 2153 // Must be parenthesized. IgnoreParens() skips __extension__ nodes, 2154 // too, but for those to appear in the callee, it would have to be 2155 // parenthesized. 2156 if (callee == fn) return false; 2157 2158 // Must be an unresolved lookup. 2159 const UnresolvedLookupExpr *lookup = dyn_cast<UnresolvedLookupExpr>(fn); 2160 if (!lookup) return false; 2161 2162 assert(!lookup->requiresADL()); 2163 2164 // Must be an unqualified lookup. 2165 if (lookup->getQualifier()) return false; 2166 2167 // Must not have found a class member. Note that if one is a class 2168 // member, they're all class members. 2169 if (lookup->getNumDecls() > 0 && 2170 (*lookup->decls_begin())->isCXXClassMember()) 2171 return false; 2172 2173 // Otherwise, ADL would have been triggered. 2174 return true; 2175} 2176 2177void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) { 2178 // <expression> ::= <unary operator-name> <expression> 2179 // ::= <binary operator-name> <expression> <expression> 2180 // ::= <trinary operator-name> <expression> <expression> <expression> 2181 // ::= cv <type> expression # conversion with one argument 2182 // ::= cv <type> _ <expression>* E # conversion with a different number of arguments 2183 // ::= st <type> # sizeof (a type) 2184 // ::= at <type> # alignof (a type) 2185 // ::= <template-param> 2186 // ::= <function-param> 2187 // ::= sr <type> <unqualified-name> # dependent name 2188 // ::= sr <type> <unqualified-name> <template-args> # dependent template-id 2189 // ::= ds <expression> <expression> # expr.*expr 2190 // ::= sZ <template-param> # size of a parameter pack 2191 // ::= sZ <function-param> # size of a function parameter pack 2192 // ::= <expr-primary> 2193 // <expr-primary> ::= L <type> <value number> E # integer literal 2194 // ::= L <type <value float> E # floating literal 2195 // ::= L <mangled-name> E # external name 2196 QualType ImplicitlyConvertedToType; 2197 2198recurse: 2199 switch (E->getStmtClass()) { 2200 case Expr::NoStmtClass: 2201#define ABSTRACT_STMT(Type) 2202#define EXPR(Type, Base) 2203#define STMT(Type, Base) \ 2204 case Expr::Type##Class: 2205#include "clang/AST/StmtNodes.inc" 2206 // fallthrough 2207 2208 // These all can only appear in local or variable-initialization 2209 // contexts and so should never appear in a mangling. 2210 case Expr::AddrLabelExprClass: 2211 case Expr::BlockDeclRefExprClass: 2212 case Expr::CXXThisExprClass: 2213 case Expr::DesignatedInitExprClass: 2214 case Expr::ImplicitValueInitExprClass: 2215 case Expr::InitListExprClass: 2216 case Expr::ParenListExprClass: 2217 case Expr::CXXScalarValueInitExprClass: 2218 llvm_unreachable("unexpected statement kind"); 2219 break; 2220 2221 // FIXME: invent manglings for all these. 2222 case Expr::BlockExprClass: 2223 case Expr::CXXPseudoDestructorExprClass: 2224 case Expr::ChooseExprClass: 2225 case Expr::CompoundLiteralExprClass: 2226 case Expr::ExtVectorElementExprClass: 2227 case Expr::GenericSelectionExprClass: 2228 case Expr::ObjCEncodeExprClass: 2229 case Expr::ObjCIsaExprClass: 2230 case Expr::ObjCIvarRefExprClass: 2231 case Expr::ObjCMessageExprClass: 2232 case Expr::ObjCPropertyRefExprClass: 2233 case Expr::ObjCProtocolExprClass: 2234 case Expr::ObjCSelectorExprClass: 2235 case Expr::ObjCStringLiteralClass: 2236 case Expr::ObjCIndirectCopyRestoreExprClass: 2237 case Expr::OffsetOfExprClass: 2238 case Expr::PredefinedExprClass: 2239 case Expr::ShuffleVectorExprClass: 2240 case Expr::StmtExprClass: 2241 case Expr::UnaryTypeTraitExprClass: 2242 case Expr::BinaryTypeTraitExprClass: 2243 case Expr::ArrayTypeTraitExprClass: 2244 case Expr::ExpressionTraitExprClass: 2245 case Expr::VAArgExprClass: 2246 case Expr::CXXUuidofExprClass: 2247 case Expr::CXXNoexceptExprClass: 2248 case Expr::CUDAKernelCallExprClass: 2249 case Expr::AsTypeExprClass: 2250 { 2251 // As bad as this diagnostic is, it's better than crashing. 2252 Diagnostic &Diags = Context.getDiags(); 2253 unsigned DiagID = Diags.getCustomDiagID(Diagnostic::Error, 2254 "cannot yet mangle expression type %0"); 2255 Diags.Report(E->getExprLoc(), DiagID) 2256 << E->getStmtClassName() << E->getSourceRange(); 2257 break; 2258 } 2259 2260 // Even gcc-4.5 doesn't mangle this. 2261 case Expr::BinaryConditionalOperatorClass: { 2262 Diagnostic &Diags = Context.getDiags(); 2263 unsigned DiagID = 2264 Diags.getCustomDiagID(Diagnostic::Error, 2265 "?: operator with omitted middle operand cannot be mangled"); 2266 Diags.Report(E->getExprLoc(), DiagID) 2267 << E->getStmtClassName() << E->getSourceRange(); 2268 break; 2269 } 2270 2271 // These are used for internal purposes and cannot be meaningfully mangled. 2272 case Expr::OpaqueValueExprClass: 2273 llvm_unreachable("cannot mangle opaque value; mangling wrong thing?"); 2274 2275 case Expr::CXXDefaultArgExprClass: 2276 mangleExpression(cast<CXXDefaultArgExpr>(E)->getExpr(), Arity); 2277 break; 2278 2279 case Expr::SubstNonTypeTemplateParmExprClass: 2280 mangleExpression(cast<SubstNonTypeTemplateParmExpr>(E)->getReplacement(), 2281 Arity); 2282 break; 2283 2284 case Expr::CXXMemberCallExprClass: // fallthrough 2285 case Expr::CallExprClass: { 2286 const CallExpr *CE = cast<CallExpr>(E); 2287 2288 // <expression> ::= cp <simple-id> <expression>* E 2289 // We use this mangling only when the call would use ADL except 2290 // for being parenthesized. Per discussion with David 2291 // Vandervoorde, 2011.04.25. 2292 if (isParenthesizedADLCallee(CE)) { 2293 Out << "cp"; 2294 // The callee here is a parenthesized UnresolvedLookupExpr with 2295 // no qualifier and should always get mangled as a <simple-id> 2296 // anyway. 2297 2298 // <expression> ::= cl <expression>* E 2299 } else { 2300 Out << "cl"; 2301 } 2302 2303 mangleExpression(CE->getCallee(), CE->getNumArgs()); 2304 for (unsigned I = 0, N = CE->getNumArgs(); I != N; ++I) 2305 mangleExpression(CE->getArg(I)); 2306 Out << 'E'; 2307 break; 2308 } 2309 2310 case Expr::CXXNewExprClass: { 2311 // Proposal from David Vandervoorde, 2010.06.30 2312 const CXXNewExpr *New = cast<CXXNewExpr>(E); 2313 if (New->isGlobalNew()) Out << "gs"; 2314 Out << (New->isArray() ? "na" : "nw"); 2315 for (CXXNewExpr::const_arg_iterator I = New->placement_arg_begin(), 2316 E = New->placement_arg_end(); I != E; ++I) 2317 mangleExpression(*I); 2318 Out << '_'; 2319 mangleType(New->getAllocatedType()); 2320 if (New->hasInitializer()) { 2321 Out << "pi"; 2322 for (CXXNewExpr::const_arg_iterator I = New->constructor_arg_begin(), 2323 E = New->constructor_arg_end(); I != E; ++I) 2324 mangleExpression(*I); 2325 } 2326 Out << 'E'; 2327 break; 2328 } 2329 2330 case Expr::MemberExprClass: { 2331 const MemberExpr *ME = cast<MemberExpr>(E); 2332 mangleMemberExpr(ME->getBase(), ME->isArrow(), 2333 ME->getQualifier(), 0, ME->getMemberDecl()->getDeclName(), 2334 Arity); 2335 break; 2336 } 2337 2338 case Expr::UnresolvedMemberExprClass: { 2339 const UnresolvedMemberExpr *ME = cast<UnresolvedMemberExpr>(E); 2340 mangleMemberExpr(ME->getBase(), ME->isArrow(), 2341 ME->getQualifier(), 0, ME->getMemberName(), 2342 Arity); 2343 if (ME->hasExplicitTemplateArgs()) 2344 mangleTemplateArgs(ME->getExplicitTemplateArgs()); 2345 break; 2346 } 2347 2348 case Expr::CXXDependentScopeMemberExprClass: { 2349 const CXXDependentScopeMemberExpr *ME 2350 = cast<CXXDependentScopeMemberExpr>(E); 2351 mangleMemberExpr(ME->getBase(), ME->isArrow(), 2352 ME->getQualifier(), ME->getFirstQualifierFoundInScope(), 2353 ME->getMember(), Arity); 2354 if (ME->hasExplicitTemplateArgs()) 2355 mangleTemplateArgs(ME->getExplicitTemplateArgs()); 2356 break; 2357 } 2358 2359 case Expr::UnresolvedLookupExprClass: { 2360 const UnresolvedLookupExpr *ULE = cast<UnresolvedLookupExpr>(E); 2361 mangleUnresolvedName(ULE->getQualifier(), 0, ULE->getName(), Arity); 2362 2363 // All the <unresolved-name> productions end in a 2364 // base-unresolved-name, where <template-args> are just tacked 2365 // onto the end. 2366 if (ULE->hasExplicitTemplateArgs()) 2367 mangleTemplateArgs(ULE->getExplicitTemplateArgs()); 2368 break; 2369 } 2370 2371 case Expr::CXXUnresolvedConstructExprClass: { 2372 const CXXUnresolvedConstructExpr *CE = cast<CXXUnresolvedConstructExpr>(E); 2373 unsigned N = CE->arg_size(); 2374 2375 Out << "cv"; 2376 mangleType(CE->getType()); 2377 if (N != 1) Out << '_'; 2378 for (unsigned I = 0; I != N; ++I) mangleExpression(CE->getArg(I)); 2379 if (N != 1) Out << 'E'; 2380 break; 2381 } 2382 2383 case Expr::CXXTemporaryObjectExprClass: 2384 case Expr::CXXConstructExprClass: { 2385 const CXXConstructExpr *CE = cast<CXXConstructExpr>(E); 2386 unsigned N = CE->getNumArgs(); 2387 2388 Out << "cv"; 2389 mangleType(CE->getType()); 2390 if (N != 1) Out << '_'; 2391 for (unsigned I = 0; I != N; ++I) mangleExpression(CE->getArg(I)); 2392 if (N != 1) Out << 'E'; 2393 break; 2394 } 2395 2396 case Expr::UnaryExprOrTypeTraitExprClass: { 2397 const UnaryExprOrTypeTraitExpr *SAE = cast<UnaryExprOrTypeTraitExpr>(E); 2398 2399 if (!SAE->isInstantiationDependent()) { 2400 // Itanium C++ ABI: 2401 // If the operand of a sizeof or alignof operator is not 2402 // instantiation-dependent it is encoded as an integer literal 2403 // reflecting the result of the operator. 2404 // 2405 // If the result of the operator is implicitly converted to a known 2406 // integer type, that type is used for the literal; otherwise, the type 2407 // of std::size_t or std::ptrdiff_t is used. 2408 QualType T = (ImplicitlyConvertedToType.isNull() || 2409 !ImplicitlyConvertedToType->isIntegerType())? SAE->getType() 2410 : ImplicitlyConvertedToType; 2411 mangleIntegerLiteral(T, SAE->EvaluateAsInt(Context.getASTContext())); 2412 break; 2413 } 2414 2415 switch(SAE->getKind()) { 2416 case UETT_SizeOf: 2417 Out << 's'; 2418 break; 2419 case UETT_AlignOf: 2420 Out << 'a'; 2421 break; 2422 case UETT_VecStep: 2423 Diagnostic &Diags = Context.getDiags(); 2424 unsigned DiagID = Diags.getCustomDiagID(Diagnostic::Error, 2425 "cannot yet mangle vec_step expression"); 2426 Diags.Report(DiagID); 2427 return; 2428 } 2429 if (SAE->isArgumentType()) { 2430 Out << 't'; 2431 mangleType(SAE->getArgumentType()); 2432 } else { 2433 Out << 'z'; 2434 mangleExpression(SAE->getArgumentExpr()); 2435 } 2436 break; 2437 } 2438 2439 case Expr::CXXThrowExprClass: { 2440 const CXXThrowExpr *TE = cast<CXXThrowExpr>(E); 2441 2442 // Proposal from David Vandervoorde, 2010.06.30 2443 if (TE->getSubExpr()) { 2444 Out << "tw"; 2445 mangleExpression(TE->getSubExpr()); 2446 } else { 2447 Out << "tr"; 2448 } 2449 break; 2450 } 2451 2452 case Expr::CXXTypeidExprClass: { 2453 const CXXTypeidExpr *TIE = cast<CXXTypeidExpr>(E); 2454 2455 // Proposal from David Vandervoorde, 2010.06.30 2456 if (TIE->isTypeOperand()) { 2457 Out << "ti"; 2458 mangleType(TIE->getTypeOperand()); 2459 } else { 2460 Out << "te"; 2461 mangleExpression(TIE->getExprOperand()); 2462 } 2463 break; 2464 } 2465 2466 case Expr::CXXDeleteExprClass: { 2467 const CXXDeleteExpr *DE = cast<CXXDeleteExpr>(E); 2468 2469 // Proposal from David Vandervoorde, 2010.06.30 2470 if (DE->isGlobalDelete()) Out << "gs"; 2471 Out << (DE->isArrayForm() ? "da" : "dl"); 2472 mangleExpression(DE->getArgument()); 2473 break; 2474 } 2475 2476 case Expr::UnaryOperatorClass: { 2477 const UnaryOperator *UO = cast<UnaryOperator>(E); 2478 mangleOperatorName(UnaryOperator::getOverloadedOperator(UO->getOpcode()), 2479 /*Arity=*/1); 2480 mangleExpression(UO->getSubExpr()); 2481 break; 2482 } 2483 2484 case Expr::ArraySubscriptExprClass: { 2485 const ArraySubscriptExpr *AE = cast<ArraySubscriptExpr>(E); 2486 2487 // Array subscript is treated as a syntactically weird form of 2488 // binary operator. 2489 Out << "ix"; 2490 mangleExpression(AE->getLHS()); 2491 mangleExpression(AE->getRHS()); 2492 break; 2493 } 2494 2495 case Expr::CompoundAssignOperatorClass: // fallthrough 2496 case Expr::BinaryOperatorClass: { 2497 const BinaryOperator *BO = cast<BinaryOperator>(E); 2498 if (BO->getOpcode() == BO_PtrMemD) 2499 Out << "ds"; 2500 else 2501 mangleOperatorName(BinaryOperator::getOverloadedOperator(BO->getOpcode()), 2502 /*Arity=*/2); 2503 mangleExpression(BO->getLHS()); 2504 mangleExpression(BO->getRHS()); 2505 break; 2506 } 2507 2508 case Expr::ConditionalOperatorClass: { 2509 const ConditionalOperator *CO = cast<ConditionalOperator>(E); 2510 mangleOperatorName(OO_Conditional, /*Arity=*/3); 2511 mangleExpression(CO->getCond()); 2512 mangleExpression(CO->getLHS(), Arity); 2513 mangleExpression(CO->getRHS(), Arity); 2514 break; 2515 } 2516 2517 case Expr::ImplicitCastExprClass: { 2518 ImplicitlyConvertedToType = E->getType(); 2519 E = cast<ImplicitCastExpr>(E)->getSubExpr(); 2520 goto recurse; 2521 } 2522 2523 case Expr::ObjCBridgedCastExprClass: { 2524 // Mangle ownership casts as a vendor extended operator __bridge, 2525 // __bridge_transfer, or __bridge_retain. 2526 StringRef Kind = cast<ObjCBridgedCastExpr>(E)->getBridgeKindName(); 2527 Out << "v1U" << Kind.size() << Kind; 2528 } 2529 // Fall through to mangle the cast itself. 2530 2531 case Expr::CStyleCastExprClass: 2532 case Expr::CXXStaticCastExprClass: 2533 case Expr::CXXDynamicCastExprClass: 2534 case Expr::CXXReinterpretCastExprClass: 2535 case Expr::CXXConstCastExprClass: 2536 case Expr::CXXFunctionalCastExprClass: { 2537 const ExplicitCastExpr *ECE = cast<ExplicitCastExpr>(E); 2538 Out << "cv"; 2539 mangleType(ECE->getType()); 2540 mangleExpression(ECE->getSubExpr()); 2541 break; 2542 } 2543 2544 case Expr::CXXOperatorCallExprClass: { 2545 const CXXOperatorCallExpr *CE = cast<CXXOperatorCallExpr>(E); 2546 unsigned NumArgs = CE->getNumArgs(); 2547 mangleOperatorName(CE->getOperator(), /*Arity=*/NumArgs); 2548 // Mangle the arguments. 2549 for (unsigned i = 0; i != NumArgs; ++i) 2550 mangleExpression(CE->getArg(i)); 2551 break; 2552 } 2553 2554 case Expr::ParenExprClass: 2555 mangleExpression(cast<ParenExpr>(E)->getSubExpr(), Arity); 2556 break; 2557 2558 case Expr::DeclRefExprClass: { 2559 const NamedDecl *D = cast<DeclRefExpr>(E)->getDecl(); 2560 2561 switch (D->getKind()) { 2562 default: 2563 // <expr-primary> ::= L <mangled-name> E # external name 2564 Out << 'L'; 2565 mangle(D, "_Z"); 2566 Out << 'E'; 2567 break; 2568 2569 case Decl::ParmVar: 2570 mangleFunctionParam(cast<ParmVarDecl>(D)); 2571 break; 2572 2573 case Decl::EnumConstant: { 2574 const EnumConstantDecl *ED = cast<EnumConstantDecl>(D); 2575 mangleIntegerLiteral(ED->getType(), ED->getInitVal()); 2576 break; 2577 } 2578 2579 case Decl::NonTypeTemplateParm: { 2580 const NonTypeTemplateParmDecl *PD = cast<NonTypeTemplateParmDecl>(D); 2581 mangleTemplateParameter(PD->getIndex()); 2582 break; 2583 } 2584 2585 } 2586 2587 break; 2588 } 2589 2590 case Expr::SubstNonTypeTemplateParmPackExprClass: 2591 // FIXME: not clear how to mangle this! 2592 // template <unsigned N...> class A { 2593 // template <class U...> void foo(U (&x)[N]...); 2594 // }; 2595 Out << "_SUBSTPACK_"; 2596 break; 2597 2598 case Expr::DependentScopeDeclRefExprClass: { 2599 const DependentScopeDeclRefExpr *DRE = cast<DependentScopeDeclRefExpr>(E); 2600 mangleUnresolvedName(DRE->getQualifier(), 0, DRE->getDeclName(), Arity); 2601 2602 // All the <unresolved-name> productions end in a 2603 // base-unresolved-name, where <template-args> are just tacked 2604 // onto the end. 2605 if (DRE->hasExplicitTemplateArgs()) 2606 mangleTemplateArgs(DRE->getExplicitTemplateArgs()); 2607 break; 2608 } 2609 2610 case Expr::CXXBindTemporaryExprClass: 2611 mangleExpression(cast<CXXBindTemporaryExpr>(E)->getSubExpr()); 2612 break; 2613 2614 case Expr::ExprWithCleanupsClass: 2615 mangleExpression(cast<ExprWithCleanups>(E)->getSubExpr(), Arity); 2616 break; 2617 2618 case Expr::FloatingLiteralClass: { 2619 const FloatingLiteral *FL = cast<FloatingLiteral>(E); 2620 Out << 'L'; 2621 mangleType(FL->getType()); 2622 mangleFloat(FL->getValue()); 2623 Out << 'E'; 2624 break; 2625 } 2626 2627 case Expr::CharacterLiteralClass: 2628 Out << 'L'; 2629 mangleType(E->getType()); 2630 Out << cast<CharacterLiteral>(E)->getValue(); 2631 Out << 'E'; 2632 break; 2633 2634 case Expr::CXXBoolLiteralExprClass: 2635 Out << "Lb"; 2636 Out << (cast<CXXBoolLiteralExpr>(E)->getValue() ? '1' : '0'); 2637 Out << 'E'; 2638 break; 2639 2640 case Expr::IntegerLiteralClass: { 2641 llvm::APSInt Value(cast<IntegerLiteral>(E)->getValue()); 2642 if (E->getType()->isSignedIntegerType()) 2643 Value.setIsSigned(true); 2644 mangleIntegerLiteral(E->getType(), Value); 2645 break; 2646 } 2647 2648 case Expr::ImaginaryLiteralClass: { 2649 const ImaginaryLiteral *IE = cast<ImaginaryLiteral>(E); 2650 // Mangle as if a complex literal. 2651 // Proposal from David Vandevoorde, 2010.06.30. 2652 Out << 'L'; 2653 mangleType(E->getType()); 2654 if (const FloatingLiteral *Imag = 2655 dyn_cast<FloatingLiteral>(IE->getSubExpr())) { 2656 // Mangle a floating-point zero of the appropriate type. 2657 mangleFloat(llvm::APFloat(Imag->getValue().getSemantics())); 2658 Out << '_'; 2659 mangleFloat(Imag->getValue()); 2660 } else { 2661 Out << "0_"; 2662 llvm::APSInt Value(cast<IntegerLiteral>(IE->getSubExpr())->getValue()); 2663 if (IE->getSubExpr()->getType()->isSignedIntegerType()) 2664 Value.setIsSigned(true); 2665 mangleNumber(Value); 2666 } 2667 Out << 'E'; 2668 break; 2669 } 2670 2671 case Expr::StringLiteralClass: { 2672 // Revised proposal from David Vandervoorde, 2010.07.15. 2673 Out << 'L'; 2674 assert(isa<ConstantArrayType>(E->getType())); 2675 mangleType(E->getType()); 2676 Out << 'E'; 2677 break; 2678 } 2679 2680 case Expr::GNUNullExprClass: 2681 // FIXME: should this really be mangled the same as nullptr? 2682 // fallthrough 2683 2684 case Expr::CXXNullPtrLiteralExprClass: { 2685 // Proposal from David Vandervoorde, 2010.06.30, as 2686 // modified by ABI list discussion. 2687 Out << "LDnE"; 2688 break; 2689 } 2690 2691 case Expr::PackExpansionExprClass: 2692 Out << "sp"; 2693 mangleExpression(cast<PackExpansionExpr>(E)->getPattern()); 2694 break; 2695 2696 case Expr::SizeOfPackExprClass: { 2697 Out << "sZ"; 2698 const NamedDecl *Pack = cast<SizeOfPackExpr>(E)->getPack(); 2699 if (const TemplateTypeParmDecl *TTP = dyn_cast<TemplateTypeParmDecl>(Pack)) 2700 mangleTemplateParameter(TTP->getIndex()); 2701 else if (const NonTypeTemplateParmDecl *NTTP 2702 = dyn_cast<NonTypeTemplateParmDecl>(Pack)) 2703 mangleTemplateParameter(NTTP->getIndex()); 2704 else if (const TemplateTemplateParmDecl *TempTP 2705 = dyn_cast<TemplateTemplateParmDecl>(Pack)) 2706 mangleTemplateParameter(TempTP->getIndex()); 2707 else 2708 mangleFunctionParam(cast<ParmVarDecl>(Pack)); 2709 break; 2710 } 2711 2712 case Expr::MaterializeTemporaryExprClass: { 2713 mangleExpression(cast<MaterializeTemporaryExpr>(E)->GetTemporaryExpr()); 2714 break; 2715 } 2716 } 2717} 2718 2719/// Mangle an expression which refers to a parameter variable. 2720/// 2721/// <expression> ::= <function-param> 2722/// <function-param> ::= fp <top-level CV-qualifiers> _ # L == 0, I == 0 2723/// <function-param> ::= fp <top-level CV-qualifiers> 2724/// <parameter-2 non-negative number> _ # L == 0, I > 0 2725/// <function-param> ::= fL <L-1 non-negative number> 2726/// p <top-level CV-qualifiers> _ # L > 0, I == 0 2727/// <function-param> ::= fL <L-1 non-negative number> 2728/// p <top-level CV-qualifiers> 2729/// <I-1 non-negative number> _ # L > 0, I > 0 2730/// 2731/// L is the nesting depth of the parameter, defined as 1 if the 2732/// parameter comes from the innermost function prototype scope 2733/// enclosing the current context, 2 if from the next enclosing 2734/// function prototype scope, and so on, with one special case: if 2735/// we've processed the full parameter clause for the innermost 2736/// function type, then L is one less. This definition conveniently 2737/// makes it irrelevant whether a function's result type was written 2738/// trailing or leading, but is otherwise overly complicated; the 2739/// numbering was first designed without considering references to 2740/// parameter in locations other than return types, and then the 2741/// mangling had to be generalized without changing the existing 2742/// manglings. 2743/// 2744/// I is the zero-based index of the parameter within its parameter 2745/// declaration clause. Note that the original ABI document describes 2746/// this using 1-based ordinals. 2747void CXXNameMangler::mangleFunctionParam(const ParmVarDecl *parm) { 2748 unsigned parmDepth = parm->getFunctionScopeDepth(); 2749 unsigned parmIndex = parm->getFunctionScopeIndex(); 2750 2751 // Compute 'L'. 2752 // parmDepth does not include the declaring function prototype. 2753 // FunctionTypeDepth does account for that. 2754 assert(parmDepth < FunctionTypeDepth.getDepth()); 2755 unsigned nestingDepth = FunctionTypeDepth.getDepth() - parmDepth; 2756 if (FunctionTypeDepth.isInResultType()) 2757 nestingDepth--; 2758 2759 if (nestingDepth == 0) { 2760 Out << "fp"; 2761 } else { 2762 Out << "fL" << (nestingDepth - 1) << 'p'; 2763 } 2764 2765 // Top-level qualifiers. We don't have to worry about arrays here, 2766 // because parameters declared as arrays should already have been 2767 // tranformed to have pointer type. FIXME: apparently these don't 2768 // get mangled if used as an rvalue of a known non-class type? 2769 assert(!parm->getType()->isArrayType() 2770 && "parameter's type is still an array type?"); 2771 mangleQualifiers(parm->getType().getQualifiers()); 2772 2773 // Parameter index. 2774 if (parmIndex != 0) { 2775 Out << (parmIndex - 1); 2776 } 2777 Out << '_'; 2778} 2779 2780void CXXNameMangler::mangleCXXCtorType(CXXCtorType T) { 2781 // <ctor-dtor-name> ::= C1 # complete object constructor 2782 // ::= C2 # base object constructor 2783 // ::= C3 # complete object allocating constructor 2784 // 2785 switch (T) { 2786 case Ctor_Complete: 2787 Out << "C1"; 2788 break; 2789 case Ctor_Base: 2790 Out << "C2"; 2791 break; 2792 case Ctor_CompleteAllocating: 2793 Out << "C3"; 2794 break; 2795 } 2796} 2797 2798void CXXNameMangler::mangleCXXDtorType(CXXDtorType T) { 2799 // <ctor-dtor-name> ::= D0 # deleting destructor 2800 // ::= D1 # complete object destructor 2801 // ::= D2 # base object destructor 2802 // 2803 switch (T) { 2804 case Dtor_Deleting: 2805 Out << "D0"; 2806 break; 2807 case Dtor_Complete: 2808 Out << "D1"; 2809 break; 2810 case Dtor_Base: 2811 Out << "D2"; 2812 break; 2813 } 2814} 2815 2816void CXXNameMangler::mangleTemplateArgs( 2817 const ASTTemplateArgumentListInfo &TemplateArgs) { 2818 // <template-args> ::= I <template-arg>+ E 2819 Out << 'I'; 2820 for (unsigned i = 0, e = TemplateArgs.NumTemplateArgs; i != e; ++i) 2821 mangleTemplateArg(0, TemplateArgs.getTemplateArgs()[i].getArgument()); 2822 Out << 'E'; 2823} 2824 2825void CXXNameMangler::mangleTemplateArgs(TemplateName Template, 2826 const TemplateArgument *TemplateArgs, 2827 unsigned NumTemplateArgs) { 2828 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 2829 return mangleTemplateArgs(*TD->getTemplateParameters(), TemplateArgs, 2830 NumTemplateArgs); 2831 2832 mangleUnresolvedTemplateArgs(TemplateArgs, NumTemplateArgs); 2833} 2834 2835void CXXNameMangler::mangleUnresolvedTemplateArgs(const TemplateArgument *args, 2836 unsigned numArgs) { 2837 // <template-args> ::= I <template-arg>+ E 2838 Out << 'I'; 2839 for (unsigned i = 0; i != numArgs; ++i) 2840 mangleTemplateArg(0, args[i]); 2841 Out << 'E'; 2842} 2843 2844void CXXNameMangler::mangleTemplateArgs(const TemplateParameterList &PL, 2845 const TemplateArgumentList &AL) { 2846 // <template-args> ::= I <template-arg>+ E 2847 Out << 'I'; 2848 for (unsigned i = 0, e = AL.size(); i != e; ++i) 2849 mangleTemplateArg(PL.getParam(i), AL[i]); 2850 Out << 'E'; 2851} 2852 2853void CXXNameMangler::mangleTemplateArgs(const TemplateParameterList &PL, 2854 const TemplateArgument *TemplateArgs, 2855 unsigned NumTemplateArgs) { 2856 // <template-args> ::= I <template-arg>+ E 2857 Out << 'I'; 2858 for (unsigned i = 0; i != NumTemplateArgs; ++i) 2859 mangleTemplateArg(PL.getParam(i), TemplateArgs[i]); 2860 Out << 'E'; 2861} 2862 2863void CXXNameMangler::mangleTemplateArg(const NamedDecl *P, 2864 TemplateArgument A) { 2865 // <template-arg> ::= <type> # type or template 2866 // ::= X <expression> E # expression 2867 // ::= <expr-primary> # simple expressions 2868 // ::= J <template-arg>* E # argument pack 2869 // ::= sp <expression> # pack expansion of (C++0x) 2870 if (!A.isInstantiationDependent() || A.isDependent()) 2871 A = Context.getASTContext().getCanonicalTemplateArgument(A); 2872 2873 switch (A.getKind()) { 2874 case TemplateArgument::Null: 2875 llvm_unreachable("Cannot mangle NULL template argument"); 2876 2877 case TemplateArgument::Type: 2878 mangleType(A.getAsType()); 2879 break; 2880 case TemplateArgument::Template: 2881 // This is mangled as <type>. 2882 mangleType(A.getAsTemplate()); 2883 break; 2884 case TemplateArgument::TemplateExpansion: 2885 // <type> ::= Dp <type> # pack expansion (C++0x) 2886 Out << "Dp"; 2887 mangleType(A.getAsTemplateOrTemplatePattern()); 2888 break; 2889 case TemplateArgument::Expression: 2890 Out << 'X'; 2891 mangleExpression(A.getAsExpr()); 2892 Out << 'E'; 2893 break; 2894 case TemplateArgument::Integral: 2895 mangleIntegerLiteral(A.getIntegralType(), *A.getAsIntegral()); 2896 break; 2897 case TemplateArgument::Declaration: { 2898 assert(P && "Missing template parameter for declaration argument"); 2899 // <expr-primary> ::= L <mangled-name> E # external name 2900 2901 // Clang produces AST's where pointer-to-member-function expressions 2902 // and pointer-to-function expressions are represented as a declaration not 2903 // an expression. We compensate for it here to produce the correct mangling. 2904 NamedDecl *D = cast<NamedDecl>(A.getAsDecl()); 2905 const NonTypeTemplateParmDecl *Parameter = cast<NonTypeTemplateParmDecl>(P); 2906 bool compensateMangling = !Parameter->getType()->isReferenceType(); 2907 if (compensateMangling) { 2908 Out << 'X'; 2909 mangleOperatorName(OO_Amp, 1); 2910 } 2911 2912 Out << 'L'; 2913 // References to external entities use the mangled name; if the name would 2914 // not normally be manged then mangle it as unqualified. 2915 // 2916 // FIXME: The ABI specifies that external names here should have _Z, but 2917 // gcc leaves this off. 2918 if (compensateMangling) 2919 mangle(D, "_Z"); 2920 else 2921 mangle(D, "Z"); 2922 Out << 'E'; 2923 2924 if (compensateMangling) 2925 Out << 'E'; 2926 2927 break; 2928 } 2929 2930 case TemplateArgument::Pack: { 2931 // Note: proposal by Mike Herrick on 12/20/10 2932 Out << 'J'; 2933 for (TemplateArgument::pack_iterator PA = A.pack_begin(), 2934 PAEnd = A.pack_end(); 2935 PA != PAEnd; ++PA) 2936 mangleTemplateArg(P, *PA); 2937 Out << 'E'; 2938 } 2939 } 2940} 2941 2942void CXXNameMangler::mangleTemplateParameter(unsigned Index) { 2943 // <template-param> ::= T_ # first template parameter 2944 // ::= T <parameter-2 non-negative number> _ 2945 if (Index == 0) 2946 Out << "T_"; 2947 else 2948 Out << 'T' << (Index - 1) << '_'; 2949} 2950 2951void CXXNameMangler::mangleExistingSubstitution(QualType type) { 2952 bool result = mangleSubstitution(type); 2953 assert(result && "no existing substitution for type"); 2954 (void) result; 2955} 2956 2957void CXXNameMangler::mangleExistingSubstitution(TemplateName tname) { 2958 bool result = mangleSubstitution(tname); 2959 assert(result && "no existing substitution for template name"); 2960 (void) result; 2961} 2962 2963// <substitution> ::= S <seq-id> _ 2964// ::= S_ 2965bool CXXNameMangler::mangleSubstitution(const NamedDecl *ND) { 2966 // Try one of the standard substitutions first. 2967 if (mangleStandardSubstitution(ND)) 2968 return true; 2969 2970 ND = cast<NamedDecl>(ND->getCanonicalDecl()); 2971 return mangleSubstitution(reinterpret_cast<uintptr_t>(ND)); 2972} 2973 2974bool CXXNameMangler::mangleSubstitution(QualType T) { 2975 if (!T.getCVRQualifiers()) { 2976 if (const RecordType *RT = T->getAs<RecordType>()) 2977 return mangleSubstitution(RT->getDecl()); 2978 } 2979 2980 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr()); 2981 2982 return mangleSubstitution(TypePtr); 2983} 2984 2985bool CXXNameMangler::mangleSubstitution(TemplateName Template) { 2986 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 2987 return mangleSubstitution(TD); 2988 2989 Template = Context.getASTContext().getCanonicalTemplateName(Template); 2990 return mangleSubstitution( 2991 reinterpret_cast<uintptr_t>(Template.getAsVoidPointer())); 2992} 2993 2994bool CXXNameMangler::mangleSubstitution(uintptr_t Ptr) { 2995 llvm::DenseMap<uintptr_t, unsigned>::iterator I = Substitutions.find(Ptr); 2996 if (I == Substitutions.end()) 2997 return false; 2998 2999 unsigned SeqID = I->second; 3000 if (SeqID == 0) 3001 Out << "S_"; 3002 else { 3003 SeqID--; 3004 3005 // <seq-id> is encoded in base-36, using digits and upper case letters. 3006 char Buffer[10]; 3007 char *BufferPtr = llvm::array_endof(Buffer); 3008 3009 if (SeqID == 0) *--BufferPtr = '0'; 3010 3011 while (SeqID) { 3012 assert(BufferPtr > Buffer && "Buffer overflow!"); 3013 3014 char c = static_cast<char>(SeqID % 36); 3015 3016 *--BufferPtr = (c < 10 ? '0' + c : 'A' + c - 10); 3017 SeqID /= 36; 3018 } 3019 3020 Out << 'S' 3021 << StringRef(BufferPtr, llvm::array_endof(Buffer)-BufferPtr) 3022 << '_'; 3023 } 3024 3025 return true; 3026} 3027 3028static bool isCharType(QualType T) { 3029 if (T.isNull()) 3030 return false; 3031 3032 return T->isSpecificBuiltinType(BuiltinType::Char_S) || 3033 T->isSpecificBuiltinType(BuiltinType::Char_U); 3034} 3035 3036/// isCharSpecialization - Returns whether a given type is a template 3037/// specialization of a given name with a single argument of type char. 3038static bool isCharSpecialization(QualType T, const char *Name) { 3039 if (T.isNull()) 3040 return false; 3041 3042 const RecordType *RT = T->getAs<RecordType>(); 3043 if (!RT) 3044 return false; 3045 3046 const ClassTemplateSpecializationDecl *SD = 3047 dyn_cast<ClassTemplateSpecializationDecl>(RT->getDecl()); 3048 if (!SD) 3049 return false; 3050 3051 if (!isStdNamespace(SD->getDeclContext())) 3052 return false; 3053 3054 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 3055 if (TemplateArgs.size() != 1) 3056 return false; 3057 3058 if (!isCharType(TemplateArgs[0].getAsType())) 3059 return false; 3060 3061 return SD->getIdentifier()->getName() == Name; 3062} 3063 3064template <std::size_t StrLen> 3065static bool isStreamCharSpecialization(const ClassTemplateSpecializationDecl*SD, 3066 const char (&Str)[StrLen]) { 3067 if (!SD->getIdentifier()->isStr(Str)) 3068 return false; 3069 3070 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 3071 if (TemplateArgs.size() != 2) 3072 return false; 3073 3074 if (!isCharType(TemplateArgs[0].getAsType())) 3075 return false; 3076 3077 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits")) 3078 return false; 3079 3080 return true; 3081} 3082 3083bool CXXNameMangler::mangleStandardSubstitution(const NamedDecl *ND) { 3084 // <substitution> ::= St # ::std:: 3085 if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) { 3086 if (isStd(NS)) { 3087 Out << "St"; 3088 return true; 3089 } 3090 } 3091 3092 if (const ClassTemplateDecl *TD = dyn_cast<ClassTemplateDecl>(ND)) { 3093 if (!isStdNamespace(TD->getDeclContext())) 3094 return false; 3095 3096 // <substitution> ::= Sa # ::std::allocator 3097 if (TD->getIdentifier()->isStr("allocator")) { 3098 Out << "Sa"; 3099 return true; 3100 } 3101 3102 // <<substitution> ::= Sb # ::std::basic_string 3103 if (TD->getIdentifier()->isStr("basic_string")) { 3104 Out << "Sb"; 3105 return true; 3106 } 3107 } 3108 3109 if (const ClassTemplateSpecializationDecl *SD = 3110 dyn_cast<ClassTemplateSpecializationDecl>(ND)) { 3111 if (!isStdNamespace(SD->getDeclContext())) 3112 return false; 3113 3114 // <substitution> ::= Ss # ::std::basic_string<char, 3115 // ::std::char_traits<char>, 3116 // ::std::allocator<char> > 3117 if (SD->getIdentifier()->isStr("basic_string")) { 3118 const TemplateArgumentList &TemplateArgs = SD->getTemplateArgs(); 3119 3120 if (TemplateArgs.size() != 3) 3121 return false; 3122 3123 if (!isCharType(TemplateArgs[0].getAsType())) 3124 return false; 3125 3126 if (!isCharSpecialization(TemplateArgs[1].getAsType(), "char_traits")) 3127 return false; 3128 3129 if (!isCharSpecialization(TemplateArgs[2].getAsType(), "allocator")) 3130 return false; 3131 3132 Out << "Ss"; 3133 return true; 3134 } 3135 3136 // <substitution> ::= Si # ::std::basic_istream<char, 3137 // ::std::char_traits<char> > 3138 if (isStreamCharSpecialization(SD, "basic_istream")) { 3139 Out << "Si"; 3140 return true; 3141 } 3142 3143 // <substitution> ::= So # ::std::basic_ostream<char, 3144 // ::std::char_traits<char> > 3145 if (isStreamCharSpecialization(SD, "basic_ostream")) { 3146 Out << "So"; 3147 return true; 3148 } 3149 3150 // <substitution> ::= Sd # ::std::basic_iostream<char, 3151 // ::std::char_traits<char> > 3152 if (isStreamCharSpecialization(SD, "basic_iostream")) { 3153 Out << "Sd"; 3154 return true; 3155 } 3156 } 3157 return false; 3158} 3159 3160void CXXNameMangler::addSubstitution(QualType T) { 3161 if (!T.getCVRQualifiers()) { 3162 if (const RecordType *RT = T->getAs<RecordType>()) { 3163 addSubstitution(RT->getDecl()); 3164 return; 3165 } 3166 } 3167 3168 uintptr_t TypePtr = reinterpret_cast<uintptr_t>(T.getAsOpaquePtr()); 3169 addSubstitution(TypePtr); 3170} 3171 3172void CXXNameMangler::addSubstitution(TemplateName Template) { 3173 if (TemplateDecl *TD = Template.getAsTemplateDecl()) 3174 return addSubstitution(TD); 3175 3176 Template = Context.getASTContext().getCanonicalTemplateName(Template); 3177 addSubstitution(reinterpret_cast<uintptr_t>(Template.getAsVoidPointer())); 3178} 3179 3180void CXXNameMangler::addSubstitution(uintptr_t Ptr) { 3181 assert(!Substitutions.count(Ptr) && "Substitution already exists!"); 3182 Substitutions[Ptr] = SeqID++; 3183} 3184 3185// 3186 3187/// \brief Mangles the name of the declaration D and emits that name to the 3188/// given output stream. 3189/// 3190/// If the declaration D requires a mangled name, this routine will emit that 3191/// mangled name to \p os and return true. Otherwise, \p os will be unchanged 3192/// and this routine will return false. In this case, the caller should just 3193/// emit the identifier of the declaration (\c D->getIdentifier()) as its 3194/// name. 3195void ItaniumMangleContext::mangleName(const NamedDecl *D, 3196 raw_ostream &Out) { 3197 assert((isa<FunctionDecl>(D) || isa<VarDecl>(D)) && 3198 "Invalid mangleName() call, argument is not a variable or function!"); 3199 assert(!isa<CXXConstructorDecl>(D) && !isa<CXXDestructorDecl>(D) && 3200 "Invalid mangleName() call on 'structor decl!"); 3201 3202 PrettyStackTraceDecl CrashInfo(D, SourceLocation(), 3203 getASTContext().getSourceManager(), 3204 "Mangling declaration"); 3205 3206 CXXNameMangler Mangler(*this, Out, D); 3207 return Mangler.mangle(D); 3208} 3209 3210void ItaniumMangleContext::mangleCXXCtor(const CXXConstructorDecl *D, 3211 CXXCtorType Type, 3212 raw_ostream &Out) { 3213 CXXNameMangler Mangler(*this, Out, D, Type); 3214 Mangler.mangle(D); 3215} 3216 3217void ItaniumMangleContext::mangleCXXDtor(const CXXDestructorDecl *D, 3218 CXXDtorType Type, 3219 raw_ostream &Out) { 3220 CXXNameMangler Mangler(*this, Out, D, Type); 3221 Mangler.mangle(D); 3222} 3223 3224void ItaniumMangleContext::mangleThunk(const CXXMethodDecl *MD, 3225 const ThunkInfo &Thunk, 3226 raw_ostream &Out) { 3227 // <special-name> ::= T <call-offset> <base encoding> 3228 // # base is the nominal target function of thunk 3229 // <special-name> ::= Tc <call-offset> <call-offset> <base encoding> 3230 // # base is the nominal target function of thunk 3231 // # first call-offset is 'this' adjustment 3232 // # second call-offset is result adjustment 3233 3234 assert(!isa<CXXDestructorDecl>(MD) && 3235 "Use mangleCXXDtor for destructor decls!"); 3236 CXXNameMangler Mangler(*this, Out); 3237 Mangler.getStream() << "_ZT"; 3238 if (!Thunk.Return.isEmpty()) 3239 Mangler.getStream() << 'c'; 3240 3241 // Mangle the 'this' pointer adjustment. 3242 Mangler.mangleCallOffset(Thunk.This.NonVirtual, Thunk.This.VCallOffsetOffset); 3243 3244 // Mangle the return pointer adjustment if there is one. 3245 if (!Thunk.Return.isEmpty()) 3246 Mangler.mangleCallOffset(Thunk.Return.NonVirtual, 3247 Thunk.Return.VBaseOffsetOffset); 3248 3249 Mangler.mangleFunctionEncoding(MD); 3250} 3251 3252void 3253ItaniumMangleContext::mangleCXXDtorThunk(const CXXDestructorDecl *DD, 3254 CXXDtorType Type, 3255 const ThisAdjustment &ThisAdjustment, 3256 raw_ostream &Out) { 3257 // <special-name> ::= T <call-offset> <base encoding> 3258 // # base is the nominal target function of thunk 3259 CXXNameMangler Mangler(*this, Out, DD, Type); 3260 Mangler.getStream() << "_ZT"; 3261 3262 // Mangle the 'this' pointer adjustment. 3263 Mangler.mangleCallOffset(ThisAdjustment.NonVirtual, 3264 ThisAdjustment.VCallOffsetOffset); 3265 3266 Mangler.mangleFunctionEncoding(DD); 3267} 3268 3269/// mangleGuardVariable - Returns the mangled name for a guard variable 3270/// for the passed in VarDecl. 3271void ItaniumMangleContext::mangleItaniumGuardVariable(const VarDecl *D, 3272 raw_ostream &Out) { 3273 // <special-name> ::= GV <object name> # Guard variable for one-time 3274 // # initialization 3275 CXXNameMangler Mangler(*this, Out); 3276 Mangler.getStream() << "_ZGV"; 3277 Mangler.mangleName(D); 3278} 3279 3280void ItaniumMangleContext::mangleReferenceTemporary(const VarDecl *D, 3281 raw_ostream &Out) { 3282 // We match the GCC mangling here. 3283 // <special-name> ::= GR <object name> 3284 CXXNameMangler Mangler(*this, Out); 3285 Mangler.getStream() << "_ZGR"; 3286 Mangler.mangleName(D); 3287} 3288 3289void ItaniumMangleContext::mangleCXXVTable(const CXXRecordDecl *RD, 3290 raw_ostream &Out) { 3291 // <special-name> ::= TV <type> # virtual table 3292 CXXNameMangler Mangler(*this, Out); 3293 Mangler.getStream() << "_ZTV"; 3294 Mangler.mangleNameOrStandardSubstitution(RD); 3295} 3296 3297void ItaniumMangleContext::mangleCXXVTT(const CXXRecordDecl *RD, 3298 raw_ostream &Out) { 3299 // <special-name> ::= TT <type> # VTT structure 3300 CXXNameMangler Mangler(*this, Out); 3301 Mangler.getStream() << "_ZTT"; 3302 Mangler.mangleNameOrStandardSubstitution(RD); 3303} 3304 3305void ItaniumMangleContext::mangleCXXCtorVTable(const CXXRecordDecl *RD, 3306 int64_t Offset, 3307 const CXXRecordDecl *Type, 3308 raw_ostream &Out) { 3309 // <special-name> ::= TC <type> <offset number> _ <base type> 3310 CXXNameMangler Mangler(*this, Out); 3311 Mangler.getStream() << "_ZTC"; 3312 Mangler.mangleNameOrStandardSubstitution(RD); 3313 Mangler.getStream() << Offset; 3314 Mangler.getStream() << '_'; 3315 Mangler.mangleNameOrStandardSubstitution(Type); 3316} 3317 3318void ItaniumMangleContext::mangleCXXRTTI(QualType Ty, 3319 raw_ostream &Out) { 3320 // <special-name> ::= TI <type> # typeinfo structure 3321 assert(!Ty.hasQualifiers() && "RTTI info cannot have top-level qualifiers"); 3322 CXXNameMangler Mangler(*this, Out); 3323 Mangler.getStream() << "_ZTI"; 3324 Mangler.mangleType(Ty); 3325} 3326 3327void ItaniumMangleContext::mangleCXXRTTIName(QualType Ty, 3328 raw_ostream &Out) { 3329 // <special-name> ::= TS <type> # typeinfo name (null terminated byte string) 3330 CXXNameMangler Mangler(*this, Out); 3331 Mangler.getStream() << "_ZTS"; 3332 Mangler.mangleType(Ty); 3333} 3334 3335MangleContext *clang::createItaniumMangleContext(ASTContext &Context, 3336 Diagnostic &Diags) { 3337 return new ItaniumMangleContext(Context, Diags); 3338} 3339