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llvm-project/clang/lib/AST/MicrosoftMangle.cpp
John McCall 0009fcc39e Make yet another placeholder type, this one marking that an expression is a bound 
member function, i.e. something of the form 'x.f' where 'f' is a non-static
member function.  Diagnose this in the general case.  Some of the new diagnostics
are probably worse than the old ones, but we now get this right much more
universally, and there's certainly room for improvement in the diagnostics.

llvm-svn: 130239
2011-04-26 20:42:42 +00:00

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//===--- MicrosoftMangle.cpp - Microsoft Visual C++ Name Mangling ---------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This provides C++ name mangling targeting the Microsoft Visual C++ ABI.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/Mangle.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/CharUnits.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/ExprCXX.h"
#include "clang/Basic/ABI.h"
using namespace clang;
namespace {
/// MicrosoftCXXNameMangler - Manage the mangling of a single name for the
/// Microsoft Visual C++ ABI.
class MicrosoftCXXNameMangler {
MangleContext &Context;
llvm::raw_ostream &Out;
ASTContext &getASTContext() const { return Context.getASTContext(); }
public:
MicrosoftCXXNameMangler(MangleContext &C, llvm::raw_ostream &Out_)
: Context(C), Out(Out_) { }
void mangle(const NamedDecl *D, llvm::StringRef Prefix = "?");
void mangleName(const NamedDecl *ND);
void mangleFunctionEncoding(const FunctionDecl *FD);
void mangleVariableEncoding(const VarDecl *VD);
void mangleNumber(int64_t Number);
void mangleType(QualType T);
private:
void mangleUnqualifiedName(const NamedDecl *ND) {
mangleUnqualifiedName(ND, ND->getDeclName());
}
void mangleUnqualifiedName(const NamedDecl *ND, DeclarationName Name);
void mangleSourceName(const IdentifierInfo *II);
void manglePostfix(const DeclContext *DC, bool NoFunction=false);
void mangleOperatorName(OverloadedOperatorKind OO);
void mangleQualifiers(Qualifiers Quals, bool IsMember);
void mangleObjCMethodName(const ObjCMethodDecl *MD);
// Declare manglers for every type class.
#define ABSTRACT_TYPE(CLASS, PARENT)
#define NON_CANONICAL_TYPE(CLASS, PARENT)
#define TYPE(CLASS, PARENT) void mangleType(const CLASS##Type *T);
#include "clang/AST/TypeNodes.def"
void mangleType(const TagType*);
void mangleType(const FunctionType *T, const FunctionDecl *D,
bool IsStructor, bool IsInstMethod);
void mangleType(const ArrayType *T, bool IsGlobal);
void mangleExtraDimensions(QualType T);
void mangleFunctionClass(const FunctionDecl *FD);
void mangleCallingConvention(const FunctionType *T, bool IsInstMethod = false);
void mangleThrowSpecification(const FunctionProtoType *T);
};
/// MicrosoftMangleContext - Overrides the default MangleContext for the
/// Microsoft Visual C++ ABI.
class MicrosoftMangleContext : public MangleContext {
public:
MicrosoftMangleContext(ASTContext &Context,
Diagnostic &Diags) : MangleContext(Context, Diags) { }
virtual bool shouldMangleDeclName(const NamedDecl *D);
virtual void mangleName(const NamedDecl *D, llvm::raw_ostream &Out);
virtual void mangleThunk(const CXXMethodDecl *MD,
const ThunkInfo &Thunk,
llvm::raw_ostream &);
virtual void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type,
const ThisAdjustment &ThisAdjustment,
llvm::raw_ostream &);
virtual void mangleCXXVTable(const CXXRecordDecl *RD,
llvm::raw_ostream &);
virtual void mangleCXXVTT(const CXXRecordDecl *RD,
llvm::raw_ostream &);
virtual void mangleCXXCtorVTable(const CXXRecordDecl *RD, int64_t Offset,
const CXXRecordDecl *Type,
llvm::raw_ostream &);
virtual void mangleCXXRTTI(QualType T, llvm::raw_ostream &);
virtual void mangleCXXRTTIName(QualType T, llvm::raw_ostream &);
virtual void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type,
llvm::raw_ostream &);
virtual void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type,
llvm::raw_ostream &);
virtual void mangleReferenceTemporary(const clang::VarDecl *,
llvm::raw_ostream &);
};
}
static bool isInCLinkageSpecification(const Decl *D) {
D = D->getCanonicalDecl();
for (const DeclContext *DC = D->getDeclContext();
!DC->isTranslationUnit(); DC = DC->getParent()) {
if (const LinkageSpecDecl *Linkage = dyn_cast<LinkageSpecDecl>(DC))
return Linkage->getLanguage() == LinkageSpecDecl::lang_c;
}
return false;
}
bool MicrosoftMangleContext::shouldMangleDeclName(const NamedDecl *D) {
// In C, functions with no attributes never need to be mangled. Fastpath them.
if (!getASTContext().getLangOptions().CPlusPlus && !D->hasAttrs())
return false;
// Any decl can be declared with __asm("foo") on it, and this takes precedence
// over all other naming in the .o file.
if (D->hasAttr<AsmLabelAttr>())
return true;
// Clang's "overloadable" attribute extension to C/C++ implies name mangling
// (always) as does passing a C++ member function and a function
// whose name is not a simple identifier.
const FunctionDecl *FD = dyn_cast<FunctionDecl>(D);
if (FD && (FD->hasAttr<OverloadableAttr>() || isa<CXXMethodDecl>(FD) ||
!FD->getDeclName().isIdentifier()))
return true;
// Otherwise, no mangling is done outside C++ mode.
if (!getASTContext().getLangOptions().CPlusPlus)
return false;
// Variables at global scope with internal linkage are not mangled.
if (!FD) {
const DeclContext *DC = D->getDeclContext();
if (DC->isTranslationUnit() && D->getLinkage() == InternalLinkage)
return false;
}
// C functions and "main" are not mangled.
if ((FD && FD->isMain()) || isInCLinkageSpecification(D))
return false;
return true;
}
void MicrosoftCXXNameMangler::mangle(const NamedDecl *D,
llvm::StringRef Prefix) {
// MSVC doesn't mangle C++ names the same way it mangles extern "C" names.
// Therefore it's really important that we don't decorate the
// name with leading underscores or leading/trailing at signs. So, emit a
// asm marker at the start so we get the name right.
Out << '\01'; // LLVM IR Marker for __asm("foo")
// Any decl can be declared with __asm("foo") on it, and this takes precedence
// over all other naming in the .o file.
if (const AsmLabelAttr *ALA = D->getAttr<AsmLabelAttr>()) {
// If we have an asm name, then we use it as the mangling.
Out << ALA->getLabel();
return;
}
// <mangled-name> ::= ? <name> <type-encoding>
Out << Prefix;
mangleName(D);
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D))
mangleFunctionEncoding(FD);
else if (const VarDecl *VD = dyn_cast<VarDecl>(D))
mangleVariableEncoding(VD);
// TODO: Fields? Can MSVC even mangle them?
}
void MicrosoftCXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD) {
// <type-encoding> ::= <function-class> <function-type>
// Don't mangle in the type if this isn't a decl we should typically mangle.
if (!Context.shouldMangleDeclName(FD))
return;
// We should never ever see a FunctionNoProtoType at this point.
// We don't even know how to mangle their types anyway :).
const FunctionProtoType *FT = cast<FunctionProtoType>(FD->getType());
bool InStructor = false, InInstMethod = false;
const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD);
if (MD) {
if (MD->isInstance())
InInstMethod = true;
if (isa<CXXConstructorDecl>(MD) || isa<CXXDestructorDecl>(MD))
InStructor = true;
}
// First, the function class.
mangleFunctionClass(FD);
mangleType(FT, FD, InStructor, InInstMethod);
}
void MicrosoftCXXNameMangler::mangleVariableEncoding(const VarDecl *VD) {
// <type-encoding> ::= <storage-class> <variable-type>
// <storage-class> ::= 0 # private static member
// ::= 1 # protected static member
// ::= 2 # public static member
// ::= 3 # global
// ::= 4 # static local
// The first character in the encoding (after the name) is the storage class.
if (VD->isStaticDataMember()) {
// If it's a static member, it also encodes the access level.
switch (VD->getAccess()) {
default:
case AS_private: Out << '0'; break;
case AS_protected: Out << '1'; break;
case AS_public: Out << '2'; break;
}
}
else if (!VD->isStaticLocal())
Out << '3';
else
Out << '4';
// Now mangle the type.
// <variable-type> ::= <type> <cvr-qualifiers>
// ::= <type> A # pointers, references, arrays
// Pointers and references are odd. The type of 'int * const foo;' gets
// mangled as 'QAHA' instead of 'PAHB', for example.
QualType Ty = VD->getType();
if (Ty->isPointerType() || Ty->isReferenceType()) {
mangleType(Ty);
Out << 'A';
} else if (Ty->isArrayType()) {
// Global arrays are funny, too.
mangleType(cast<ArrayType>(Ty.getTypePtr()), true);
Out << 'A';
} else {
mangleType(Ty.getLocalUnqualifiedType());
mangleQualifiers(Ty.getLocalQualifiers(), false);
}
}
void MicrosoftCXXNameMangler::mangleName(const NamedDecl *ND) {
// <name> ::= <unscoped-name> {[<named-scope>]+ | [<nested-name>]}? @
const DeclContext *DC = ND->getDeclContext();
// Always start with the unqualified name.
mangleUnqualifiedName(ND);
// If this is an extern variable declared locally, the relevant DeclContext
// is that of the containing namespace, or the translation unit.
if (isa<FunctionDecl>(DC) && ND->hasLinkage())
while (!DC->isNamespace() && !DC->isTranslationUnit())
DC = DC->getParent();
manglePostfix(DC);
// Terminate the whole name with an '@'.
Out << '@';
}
void MicrosoftCXXNameMangler::mangleNumber(int64_t Number) {
// <number> ::= [?] <decimal digit> # <= 9
// ::= [?] <hex digit>+ @ # > 9; A = 0, B = 1, etc...
if (Number < 0) {
Out << '?';
Number = -Number;
}
if (Number >= 1 && Number <= 10) {
Out << Number-1;
} else {
// We have to build up the encoding in reverse order, so it will come
// out right when we write it out.
char Encoding[16];
char *EndPtr = Encoding+sizeof(Encoding);
char *CurPtr = EndPtr;
while (Number) {
*--CurPtr = 'A' + (Number % 16);
Number /= 16;
}
Out.write(CurPtr, EndPtr-CurPtr);
Out << '@';
}
}
void
MicrosoftCXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND,
DeclarationName Name) {
// <unqualified-name> ::= <operator-name>
// ::= <ctor-dtor-name>
// ::= <source-name>
switch (Name.getNameKind()) {
case DeclarationName::Identifier: {
if (const IdentifierInfo *II = Name.getAsIdentifierInfo()) {
mangleSourceName(II);
break;
}
// Otherwise, an anonymous entity. We must have a declaration.
assert(ND && "mangling empty name without declaration");
if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) {
if (NS->isAnonymousNamespace()) {
Out << "?A";
break;
}
}
// We must have an anonymous struct.
const TagDecl *TD = cast<TagDecl>(ND);
if (const TypedefNameDecl *D = TD->getTypedefNameForAnonDecl()) {
assert(TD->getDeclContext() == D->getDeclContext() &&
"Typedef should not be in another decl context!");
assert(D->getDeclName().getAsIdentifierInfo() &&
"Typedef was not named!");
mangleSourceName(D->getDeclName().getAsIdentifierInfo());
break;
}
// When VC encounters an anonymous type with no tag and no typedef,
// it literally emits '<unnamed-tag>'.
Out << "<unnamed-tag>";
break;
}
case DeclarationName::ObjCZeroArgSelector:
case DeclarationName::ObjCOneArgSelector:
case DeclarationName::ObjCMultiArgSelector:
assert(false && "Can't mangle Objective-C selector names here!");
break;
case DeclarationName::CXXConstructorName:
assert(false && "Can't mangle constructors yet!");
break;
case DeclarationName::CXXDestructorName:
assert(false && "Can't mangle destructors yet!");
break;
case DeclarationName::CXXConversionFunctionName:
// <operator-name> ::= ?B # (cast)
// The target type is encoded as the return type.
Out << "?B";
break;
case DeclarationName::CXXOperatorName:
mangleOperatorName(Name.getCXXOverloadedOperator());
break;
case DeclarationName::CXXLiteralOperatorName:
// FIXME: Was this added in VS2010? Does MS even know how to mangle this?
assert(false && "Don't know how to mangle literal operators yet!");
break;
case DeclarationName::CXXUsingDirective:
assert(false && "Can't mangle a using directive name!");
break;
}
}
void MicrosoftCXXNameMangler::manglePostfix(const DeclContext *DC,
bool NoFunction) {
// <postfix> ::= <unqualified-name> [<postfix>]
// ::= <template-postfix> <template-args> [<postfix>]
// ::= <template-param>
// ::= <substitution> [<postfix>]
if (!DC) return;
while (isa<LinkageSpecDecl>(DC))
DC = DC->getParent();
if (DC->isTranslationUnit())
return;
if (const BlockDecl *BD = dyn_cast<BlockDecl>(DC)) {
Context.mangleBlock(BD, Out);
Out << '@';
return manglePostfix(DC->getParent(), NoFunction);
}
if (NoFunction && (isa<FunctionDecl>(DC) || isa<ObjCMethodDecl>(DC)))
return;
else if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(DC))
mangleObjCMethodName(Method);
else {
mangleUnqualifiedName(cast<NamedDecl>(DC));
manglePostfix(DC->getParent(), NoFunction);
}
}
void MicrosoftCXXNameMangler::mangleOperatorName(OverloadedOperatorKind OO) {
switch (OO) {
// ?0 # constructor
// ?1 # destructor
// <operator-name> ::= ?2 # new
case OO_New: Out << "?2"; break;
// <operator-name> ::= ?3 # delete
case OO_Delete: Out << "?3"; break;
// <operator-name> ::= ?4 # =
case OO_Equal: Out << "?4"; break;
// <operator-name> ::= ?5 # >>
case OO_GreaterGreater: Out << "?5"; break;
// <operator-name> ::= ?6 # <<
case OO_LessLess: Out << "?6"; break;
// <operator-name> ::= ?7 # !
case OO_Exclaim: Out << "?7"; break;
// <operator-name> ::= ?8 # ==
case OO_EqualEqual: Out << "?8"; break;
// <operator-name> ::= ?9 # !=
case OO_ExclaimEqual: Out << "?9"; break;
// <operator-name> ::= ?A # []
case OO_Subscript: Out << "?A"; break;
// ?B # conversion
// <operator-name> ::= ?C # ->
case OO_Arrow: Out << "?C"; break;
// <operator-name> ::= ?D # *
case OO_Star: Out << "?D"; break;
// <operator-name> ::= ?E # ++
case OO_PlusPlus: Out << "?E"; break;
// <operator-name> ::= ?F # --
case OO_MinusMinus: Out << "?F"; break;
// <operator-name> ::= ?G # -
case OO_Minus: Out << "?G"; break;
// <operator-name> ::= ?H # +
case OO_Plus: Out << "?H"; break;
// <operator-name> ::= ?I # &
case OO_Amp: Out << "?I"; break;
// <operator-name> ::= ?J # ->*
case OO_ArrowStar: Out << "?J"; break;
// <operator-name> ::= ?K # /
case OO_Slash: Out << "?K"; break;
// <operator-name> ::= ?L # %
case OO_Percent: Out << "?L"; break;
// <operator-name> ::= ?M # <
case OO_Less: Out << "?M"; break;
// <operator-name> ::= ?N # <=
case OO_LessEqual: Out << "?N"; break;
// <operator-name> ::= ?O # >
case OO_Greater: Out << "?O"; break;
// <operator-name> ::= ?P # >=
case OO_GreaterEqual: Out << "?P"; break;
// <operator-name> ::= ?Q # ,
case OO_Comma: Out << "?Q"; break;
// <operator-name> ::= ?R # ()
case OO_Call: Out << "?R"; break;
// <operator-name> ::= ?S # ~
case OO_Tilde: Out << "?S"; break;
// <operator-name> ::= ?T # ^
case OO_Caret: Out << "?T"; break;
// <operator-name> ::= ?U # |
case OO_Pipe: Out << "?U"; break;
// <operator-name> ::= ?V # &&
case OO_AmpAmp: Out << "?V"; break;
// <operator-name> ::= ?W # ||
case OO_PipePipe: Out << "?W"; break;
// <operator-name> ::= ?X # *=
case OO_StarEqual: Out << "?X"; break;
// <operator-name> ::= ?Y # +=
case OO_PlusEqual: Out << "?Y"; break;
// <operator-name> ::= ?Z # -=
case OO_MinusEqual: Out << "?Z"; break;
// <operator-name> ::= ?_0 # /=
case OO_SlashEqual: Out << "?_0"; break;
// <operator-name> ::= ?_1 # %=
case OO_PercentEqual: Out << "?_1"; break;
// <operator-name> ::= ?_2 # >>=
case OO_GreaterGreaterEqual: Out << "?_2"; break;
// <operator-name> ::= ?_3 # <<=
case OO_LessLessEqual: Out << "?_3"; break;
// <operator-name> ::= ?_4 # &=
case OO_AmpEqual: Out << "?_4"; break;
// <operator-name> ::= ?_5 # |=
case OO_PipeEqual: Out << "?_5"; break;
// <operator-name> ::= ?_6 # ^=
case OO_CaretEqual: Out << "?_6"; break;
// ?_7 # vftable
// ?_8 # vbtable
// ?_9 # vcall
// ?_A # typeof
// ?_B # local static guard
// ?_C # string
// ?_D # vbase destructor
// ?_E # vector deleting destructor
// ?_F # default constructor closure
// ?_G # scalar deleting destructor
// ?_H # vector constructor iterator
// ?_I # vector destructor iterator
// ?_J # vector vbase constructor iterator
// ?_K # virtual displacement map
// ?_L # eh vector constructor iterator
// ?_M # eh vector destructor iterator
// ?_N # eh vector vbase constructor iterator
// ?_O # copy constructor closure
// ?_P<name> # udt returning <name>
// ?_Q # <unknown>
// ?_R0 # RTTI Type Descriptor
// ?_R1 # RTTI Base Class Descriptor at (a,b,c,d)
// ?_R2 # RTTI Base Class Array
// ?_R3 # RTTI Class Hierarchy Descriptor
// ?_R4 # RTTI Complete Object Locator
// ?_S # local vftable
// ?_T # local vftable constructor closure
// <operator-name> ::= ?_U # new[]
case OO_Array_New: Out << "?_U"; break;
// <operator-name> ::= ?_V # delete[]
case OO_Array_Delete: Out << "?_V"; break;
case OO_Conditional:
assert(false && "Don't know how to mangle ?:");
break;
case OO_None:
case NUM_OVERLOADED_OPERATORS:
assert(false && "Not an overloaded operator");
break;
}
}
void MicrosoftCXXNameMangler::mangleSourceName(const IdentifierInfo *II) {
// <source name> ::= <identifier> @
Out << II->getName() << '@';
}
void MicrosoftCXXNameMangler::mangleObjCMethodName(const ObjCMethodDecl *MD) {
Context.mangleObjCMethodName(MD, Out);
}
void MicrosoftCXXNameMangler::mangleQualifiers(Qualifiers Quals,
bool IsMember) {
// <cvr-qualifiers> ::= [E] [F] [I] <base-cvr-qualifiers>
// 'E' means __ptr64 (32-bit only); 'F' means __unaligned (32/64-bit only);
// 'I' means __restrict (32/64-bit).
// Note that the MSVC __restrict keyword isn't the same as the C99 restrict
// keyword!
// <base-cvr-qualifiers> ::= A # near
// ::= B # near const
// ::= C # near volatile
// ::= D # near const volatile
// ::= E # far (16-bit)
// ::= F # far const (16-bit)
// ::= G # far volatile (16-bit)
// ::= H # far const volatile (16-bit)
// ::= I # huge (16-bit)
// ::= J # huge const (16-bit)
// ::= K # huge volatile (16-bit)
// ::= L # huge const volatile (16-bit)
// ::= M <basis> # based
// ::= N <basis> # based const
// ::= O <basis> # based volatile
// ::= P <basis> # based const volatile
// ::= Q # near member
// ::= R # near const member
// ::= S # near volatile member
// ::= T # near const volatile member
// ::= U # far member (16-bit)
// ::= V # far const member (16-bit)
// ::= W # far volatile member (16-bit)
// ::= X # far const volatile member (16-bit)
// ::= Y # huge member (16-bit)
// ::= Z # huge const member (16-bit)
// ::= 0 # huge volatile member (16-bit)
// ::= 1 # huge const volatile member (16-bit)
// ::= 2 <basis> # based member
// ::= 3 <basis> # based const member
// ::= 4 <basis> # based volatile member
// ::= 5 <basis> # based const volatile member
// ::= 6 # near function (pointers only)
// ::= 7 # far function (pointers only)
// ::= 8 # near method (pointers only)
// ::= 9 # far method (pointers only)
// ::= _A <basis> # based function (pointers only)
// ::= _B <basis> # based function (far?) (pointers only)
// ::= _C <basis> # based method (pointers only)
// ::= _D <basis> # based method (far?) (pointers only)
// ::= _E # block (Clang)
// <basis> ::= 0 # __based(void)
// ::= 1 # __based(segment)?
// ::= 2 <name> # __based(name)
// ::= 3 # ?
// ::= 4 # ?
// ::= 5 # not really based
if (!IsMember) {
if (!Quals.hasVolatile()) {
if (!Quals.hasConst())
Out << 'A';
else
Out << 'B';
} else {
if (!Quals.hasConst())
Out << 'C';
else
Out << 'D';
}
} else {
if (!Quals.hasVolatile()) {
if (!Quals.hasConst())
Out << 'Q';
else
Out << 'R';
} else {
if (!Quals.hasConst())
Out << 'S';
else
Out << 'T';
}
}
// FIXME: For now, just drop all extension qualifiers on the floor.
}
void MicrosoftCXXNameMangler::mangleType(QualType T) {
// Only operate on the canonical type!
T = getASTContext().getCanonicalType(T);
Qualifiers Quals = T.getLocalQualifiers();
if (Quals) {
// We have to mangle these now, while we still have enough information.
// <pointer-cvr-qualifiers> ::= P # pointer
// ::= Q # const pointer
// ::= R # volatile pointer
// ::= S # const volatile pointer
if (T->isAnyPointerType() || T->isMemberPointerType() ||
T->isBlockPointerType()) {
if (!Quals.hasVolatile())
Out << 'Q';
else {
if (!Quals.hasConst())
Out << 'R';
else
Out << 'S';
}
} else
// Just emit qualifiers like normal.
// NB: When we mangle a pointer/reference type, and the pointee
// type has no qualifiers, the lack of qualifier gets mangled
// in there.
mangleQualifiers(Quals, false);
} else if (T->isAnyPointerType() || T->isMemberPointerType() ||
T->isBlockPointerType()) {
Out << 'P';
}
switch (T->getTypeClass()) {
#define ABSTRACT_TYPE(CLASS, PARENT)
#define NON_CANONICAL_TYPE(CLASS, PARENT) \
case Type::CLASS: \
llvm_unreachable("can't mangle non-canonical type " #CLASS "Type"); \
return;
#define TYPE(CLASS, PARENT) \
case Type::CLASS: \
mangleType(static_cast<const CLASS##Type*>(T.getTypePtr())); \
break;
#include "clang/AST/TypeNodes.def"
}
}
void MicrosoftCXXNameMangler::mangleType(const BuiltinType *T) {
// <type> ::= <builtin-type>
// <builtin-type> ::= X # void
// ::= C # signed char
// ::= D # char
// ::= E # unsigned char
// ::= F # short
// ::= G # unsigned short (or wchar_t if it's not a builtin)
// ::= H # int
// ::= I # unsigned int
// ::= J # long
// ::= K # unsigned long
// L # <none>
// ::= M # float
// ::= N # double
// ::= O # long double (__float80 is mangled differently)
// ::= _D # __int8 (yup, it's a distinct type in MSVC)
// ::= _E # unsigned __int8
// ::= _F # __int16
// ::= _G # unsigned __int16
// ::= _H # __int32
// ::= _I # unsigned __int32
// ::= _J # long long, __int64
// ::= _K # unsigned long long, __int64
// ::= _L # __int128
// ::= _M # unsigned __int128
// ::= _N # bool
// _O # <array in parameter>
// ::= _T # __float80 (Intel)
// ::= _W # wchar_t
// ::= _Z # __float80 (Digital Mars)
switch (T->getKind()) {
case BuiltinType::Void: Out << 'X'; break;
case BuiltinType::SChar: Out << 'C'; break;
case BuiltinType::Char_U: case BuiltinType::Char_S: Out << 'D'; break;
case BuiltinType::UChar: Out << 'E'; break;
case BuiltinType::Short: Out << 'F'; break;
case BuiltinType::UShort: Out << 'G'; break;
case BuiltinType::Int: Out << 'H'; break;
case BuiltinType::UInt: Out << 'I'; break;
case BuiltinType::Long: Out << 'J'; break;
case BuiltinType::ULong: Out << 'K'; break;
case BuiltinType::Float: Out << 'M'; break;
case BuiltinType::Double: Out << 'N'; break;
// TODO: Determine size and mangle accordingly
case BuiltinType::LongDouble: Out << 'O'; break;
// TODO: __int8 and friends
case BuiltinType::LongLong: Out << "_J"; break;
case BuiltinType::ULongLong: Out << "_K"; break;
case BuiltinType::Int128: Out << "_L"; break;
case BuiltinType::UInt128: Out << "_M"; break;
case BuiltinType::Bool: Out << "_N"; break;
case BuiltinType::WChar_S:
case BuiltinType::WChar_U: Out << "_W"; break;
case BuiltinType::Overload:
case BuiltinType::Dependent:
case BuiltinType::UnknownAny:
case BuiltinType::BoundMember:
assert(false &&
"Overloaded and dependent types shouldn't get to name mangling");
break;
case BuiltinType::ObjCId: Out << "PAUobjc_object@@"; break;
case BuiltinType::ObjCClass: Out << "PAUobjc_class@@"; break;
case BuiltinType::ObjCSel: Out << "PAUobjc_selector@@"; break;
case BuiltinType::Char16:
case BuiltinType::Char32:
case BuiltinType::NullPtr:
assert(false && "Don't know how to mangle this type");
break;
}
}
// <type> ::= <function-type>
void MicrosoftCXXNameMangler::mangleType(const FunctionProtoType *T) {
// Structors only appear in decls, so at this point we know it's not a
// structor type.
// I'll probably have mangleType(MemberPointerType) call the mangleType()
// method directly.
mangleType(T, NULL, false, false);
}
void MicrosoftCXXNameMangler::mangleType(const FunctionNoProtoType *T) {
llvm_unreachable("Can't mangle K&R function prototypes");
}
void MicrosoftCXXNameMangler::mangleType(const FunctionType *T,
const FunctionDecl *D,
bool IsStructor,
bool IsInstMethod) {
// <function-type> ::= <this-cvr-qualifiers> <calling-convention>
// <return-type> <argument-list> <throw-spec>
const FunctionProtoType *Proto = cast<FunctionProtoType>(T);
// If this is a C++ instance method, mangle the CVR qualifiers for the
// this pointer.
if (IsInstMethod)
mangleQualifiers(Qualifiers::fromCVRMask(Proto->getTypeQuals()), false);
mangleCallingConvention(T, IsInstMethod);
// <return-type> ::= <type>
// ::= @ # structors (they have no declared return type)
if (IsStructor)
Out << '@';
else
mangleType(Proto->getResultType());
// <argument-list> ::= X # void
// ::= <type>+ @
// ::= <type>* Z # varargs
if (Proto->getNumArgs() == 0 && !Proto->isVariadic()) {
Out << 'X';
} else {
if (D) {
// If we got a decl, use the "types-as-written" to make sure arrays
// get mangled right.
for (FunctionDecl::param_const_iterator Parm = D->param_begin(),
ParmEnd = D->param_end();
Parm != ParmEnd; ++Parm)
mangleType((*Parm)->getTypeSourceInfo()->getType());
} else {
for (FunctionProtoType::arg_type_iterator Arg = Proto->arg_type_begin(),
ArgEnd = Proto->arg_type_end();
Arg != ArgEnd; ++Arg)
mangleType(*Arg);
}
// <builtin-type> ::= Z # ellipsis
if (Proto->isVariadic())
Out << 'Z';
else
Out << '@';
}
mangleThrowSpecification(Proto);
}
void MicrosoftCXXNameMangler::mangleFunctionClass(const FunctionDecl *FD) {
// <function-class> ::= A # private: near
// ::= B # private: far
// ::= C # private: static near
// ::= D # private: static far
// ::= E # private: virtual near
// ::= F # private: virtual far
// ::= G # private: thunk near
// ::= H # private: thunk far
// ::= I # protected: near
// ::= J # protected: far
// ::= K # protected: static near
// ::= L # protected: static far
// ::= M # protected: virtual near
// ::= N # protected: virtual far
// ::= O # protected: thunk near
// ::= P # protected: thunk far
// ::= Q # public: near
// ::= R # public: far
// ::= S # public: static near
// ::= T # public: static far
// ::= U # public: virtual near
// ::= V # public: virtual far
// ::= W # public: thunk near
// ::= X # public: thunk far
// ::= Y # global near
// ::= Z # global far
if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(FD)) {
switch (MD->getAccess()) {
default:
case AS_private:
if (MD->isStatic())
Out << 'C';
else if (MD->isVirtual())
Out << 'E';
else
Out << 'A';
break;
case AS_protected:
if (MD->isStatic())
Out << 'K';
else if (MD->isVirtual())
Out << 'M';
else
Out << 'I';
break;
case AS_public:
if (MD->isStatic())
Out << 'S';
else if (MD->isVirtual())
Out << 'U';
else
Out << 'Q';
}
} else
Out << 'Y';
}
void MicrosoftCXXNameMangler::mangleCallingConvention(const FunctionType *T,
bool IsInstMethod) {
// <calling-convention> ::= A # __cdecl
// ::= B # __export __cdecl
// ::= C # __pascal
// ::= D # __export __pascal
// ::= E # __thiscall
// ::= F # __export __thiscall
// ::= G # __stdcall
// ::= H # __export __stdcall
// ::= I # __fastcall
// ::= J # __export __fastcall
// The 'export' calling conventions are from a bygone era
// (*cough*Win16*cough*) when functions were declared for export with
// that keyword. (It didn't actually export them, it just made them so
// that they could be in a DLL and somebody from another module could call
// them.)
CallingConv CC = T->getCallConv();
if (CC == CC_Default)
CC = IsInstMethod ? getASTContext().getDefaultMethodCallConv() : CC_C;
switch (CC) {
default:
assert(0 && "Unsupported CC for mangling");
case CC_Default:
case CC_C: Out << 'A'; break;
case CC_X86Pascal: Out << 'C'; break;
case CC_X86ThisCall: Out << 'E'; break;
case CC_X86StdCall: Out << 'G'; break;
case CC_X86FastCall: Out << 'I'; break;
}
}
void MicrosoftCXXNameMangler::mangleThrowSpecification(
const FunctionProtoType *FT) {
// <throw-spec> ::= Z # throw(...) (default)
// ::= @ # throw() or __declspec/__attribute__((nothrow))
// ::= <type>+
// NOTE: Since the Microsoft compiler ignores throw specifications, they are
// all actually mangled as 'Z'. (They're ignored because their associated
// functionality isn't implemented, and probably never will be.)
Out << 'Z';
}
void MicrosoftCXXNameMangler::mangleType(const UnresolvedUsingType *T) {
assert(false && "Don't know how to mangle UnresolvedUsingTypes yet!");
}
// <type> ::= <union-type> | <struct-type> | <class-type> | <enum-type>
// <union-type> ::= T <name>
// <struct-type> ::= U <name>
// <class-type> ::= V <name>
// <enum-type> ::= W <size> <name>
void MicrosoftCXXNameMangler::mangleType(const EnumType *T) {
mangleType(static_cast<const TagType*>(T));
}
void MicrosoftCXXNameMangler::mangleType(const RecordType *T) {
mangleType(static_cast<const TagType*>(T));
}
void MicrosoftCXXNameMangler::mangleType(const TagType *T) {
switch (T->getDecl()->getTagKind()) {
case TTK_Union:
Out << 'T';
break;
case TTK_Struct:
Out << 'U';
break;
case TTK_Class:
Out << 'V';
break;
case TTK_Enum:
Out << 'W';
Out << getASTContext().getTypeSizeInChars(
cast<EnumDecl>(T->getDecl())->getIntegerType()).getQuantity();
break;
}
mangleName(T->getDecl());
}
// <type> ::= <array-type>
// <array-type> ::= P <cvr-qualifiers> [Y <dimension-count> <dimension>+]
// <element-type> # as global
// ::= Q <cvr-qualifiers> [Y <dimension-count> <dimension>+]
// <element-type> # as param
// It's supposed to be the other way around, but for some strange reason, it
// isn't. Today this behavior is retained for the sole purpose of backwards
// compatibility.
void MicrosoftCXXNameMangler::mangleType(const ArrayType *T, bool IsGlobal) {
// This isn't a recursive mangling, so now we have to do it all in this
// one call.
if (IsGlobal)
Out << 'P';
else
Out << 'Q';
mangleExtraDimensions(T->getElementType());
}
void MicrosoftCXXNameMangler::mangleType(const ConstantArrayType *T) {
mangleType(static_cast<const ArrayType *>(T), false);
}
void MicrosoftCXXNameMangler::mangleType(const VariableArrayType *T) {
mangleType(static_cast<const ArrayType *>(T), false);
}
void MicrosoftCXXNameMangler::mangleType(const DependentSizedArrayType *T) {
mangleType(static_cast<const ArrayType *>(T), false);
}
void MicrosoftCXXNameMangler::mangleType(const IncompleteArrayType *T) {
mangleType(static_cast<const ArrayType *>(T), false);
}
void MicrosoftCXXNameMangler::mangleExtraDimensions(QualType ElementTy) {
llvm::SmallVector<llvm::APInt, 3> Dimensions;
for (;;) {
if (ElementTy->isConstantArrayType()) {
const ConstantArrayType *CAT =
static_cast<const ConstantArrayType *>(ElementTy.getTypePtr());
Dimensions.push_back(CAT->getSize());
ElementTy = CAT->getElementType();
} else if (ElementTy->isVariableArrayType()) {
assert(false && "Don't know how to mangle VLAs!");
} else if (ElementTy->isDependentSizedArrayType()) {
// The dependent expression has to be folded into a constant (TODO).
assert(false && "Don't know how to mangle dependent-sized arrays!");
} else if (ElementTy->isIncompleteArrayType()) continue;
else break;
}
mangleQualifiers(ElementTy.getQualifiers(), false);
// If there are any additional dimensions, mangle them now.
if (Dimensions.size() > 0) {
Out << 'Y';
// <dimension-count> ::= <number> # number of extra dimensions
mangleNumber(Dimensions.size());
for (unsigned Dim = 0; Dim < Dimensions.size(); ++Dim) {
mangleNumber(Dimensions[Dim].getLimitedValue());
}
}
mangleType(ElementTy.getLocalUnqualifiedType());
}
// <type> ::= <pointer-to-member-type>
// <pointer-to-member-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers>
// <class name> <type>
void MicrosoftCXXNameMangler::mangleType(const MemberPointerType *T) {
QualType PointeeType = T->getPointeeType();
if (const FunctionProtoType *FPT = dyn_cast<FunctionProtoType>(PointeeType)) {
Out << '8';
mangleName(cast<RecordType>(T->getClass())->getDecl());
mangleType(FPT, NULL, false, true);
} else {
mangleQualifiers(PointeeType.getQualifiers(), true);
mangleName(cast<RecordType>(T->getClass())->getDecl());
mangleType(PointeeType.getLocalUnqualifiedType());
}
}
void MicrosoftCXXNameMangler::mangleType(const TemplateTypeParmType *T) {
assert(false && "Don't know how to mangle TemplateTypeParmTypes yet!");
}
void MicrosoftCXXNameMangler::mangleType(
const SubstTemplateTypeParmPackType *T) {
assert(false &&
"Don't know how to mangle SubstTemplateTypeParmPackTypes yet!");
}
// <type> ::= <pointer-type>
// <pointer-type> ::= <pointer-cvr-qualifiers> <cvr-qualifiers> <type>
void MicrosoftCXXNameMangler::mangleType(const PointerType *T) {
QualType PointeeTy = T->getPointeeType();
if (PointeeTy->isArrayType()) {
// Pointers to arrays are mangled like arrays.
mangleExtraDimensions(T->getPointeeType());
} else if (PointeeTy->isFunctionType()) {
// Function pointers are special.
Out << '6';
mangleType(static_cast<const FunctionType *>(PointeeTy.getTypePtr()),
NULL, false, false);
} else {
if (!PointeeTy.hasQualifiers())
// Lack of qualifiers is mangled as 'A'.
Out << 'A';
mangleType(PointeeTy);
}
}
void MicrosoftCXXNameMangler::mangleType(const ObjCObjectPointerType *T) {
// Object pointers never have qualifiers.
Out << 'A';
mangleType(T->getPointeeType());
}
// <type> ::= <reference-type>
// <reference-type> ::= A <cvr-qualifiers> <type>
void MicrosoftCXXNameMangler::mangleType(const LValueReferenceType *T) {
Out << 'A';
QualType PointeeTy = T->getPointeeType();
if (!PointeeTy.hasQualifiers())
// Lack of qualifiers is mangled as 'A'.
Out << 'A';
mangleType(PointeeTy);
}
void MicrosoftCXXNameMangler::mangleType(const RValueReferenceType *T) {
assert(false && "Don't know how to mangle RValueReferenceTypes yet!");
}
void MicrosoftCXXNameMangler::mangleType(const ComplexType *T) {
assert(false && "Don't know how to mangle ComplexTypes yet!");
}
void MicrosoftCXXNameMangler::mangleType(const VectorType *T) {
assert(false && "Don't know how to mangle VectorTypes yet!");
}
void MicrosoftCXXNameMangler::mangleType(const ExtVectorType *T) {
assert(false && "Don't know how to mangle ExtVectorTypes yet!");
}
void MicrosoftCXXNameMangler::mangleType(const DependentSizedExtVectorType *T) {
assert(false && "Don't know how to mangle DependentSizedExtVectorTypes yet!");
}
void MicrosoftCXXNameMangler::mangleType(const ObjCInterfaceType *T) {
// ObjC interfaces have structs underlying them.
Out << 'U';
mangleName(T->getDecl());
}
void MicrosoftCXXNameMangler::mangleType(const ObjCObjectType *T) {
// We don't allow overloading by different protocol qualification,
// so mangling them isn't necessary.
mangleType(T->getBaseType());
}
void MicrosoftCXXNameMangler::mangleType(const BlockPointerType *T) {
Out << "_E";
mangleType(T->getPointeeType());
}
void MicrosoftCXXNameMangler::mangleType(const InjectedClassNameType *T) {
assert(false && "Don't know how to mangle InjectedClassNameTypes yet!");
}
void MicrosoftCXXNameMangler::mangleType(const TemplateSpecializationType *T) {
assert(false && "Don't know how to mangle TemplateSpecializationTypes yet!");
}
void MicrosoftCXXNameMangler::mangleType(const DependentNameType *T) {
assert(false && "Don't know how to mangle DependentNameTypes yet!");
}
void MicrosoftCXXNameMangler::mangleType(
const DependentTemplateSpecializationType *T) {
assert(false &&
"Don't know how to mangle DependentTemplateSpecializationTypes yet!");
}
void MicrosoftCXXNameMangler::mangleType(const PackExpansionType *T) {
assert(false && "Don't know how to mangle PackExpansionTypes yet!");
}
void MicrosoftCXXNameMangler::mangleType(const TypeOfType *T) {
assert(false && "Don't know how to mangle TypeOfTypes yet!");
}
void MicrosoftCXXNameMangler::mangleType(const TypeOfExprType *T) {
assert(false && "Don't know how to mangle TypeOfExprTypes yet!");
}
void MicrosoftCXXNameMangler::mangleType(const DecltypeType *T) {
assert(false && "Don't know how to mangle DecltypeTypes yet!");
}
void MicrosoftCXXNameMangler::mangleType(const AutoType *T) {
assert(false && "Don't know how to mangle AutoTypes yet!");
}
void MicrosoftMangleContext::mangleName(const NamedDecl *D,
llvm::raw_ostream &Out) {
assert((isa<FunctionDecl>(D) || isa<VarDecl>(D)) &&
"Invalid mangleName() call, argument is not a variable or function!");
assert(!isa<CXXConstructorDecl>(D) && !isa<CXXDestructorDecl>(D) &&
"Invalid mangleName() call on 'structor decl!");
PrettyStackTraceDecl CrashInfo(D, SourceLocation(),
getASTContext().getSourceManager(),
"Mangling declaration");
MicrosoftCXXNameMangler Mangler(*this, Out);
return Mangler.mangle(D);
}
void MicrosoftMangleContext::mangleThunk(const CXXMethodDecl *MD,
const ThunkInfo &Thunk,
llvm::raw_ostream &) {
assert(false && "Can't yet mangle thunks!");
}
void MicrosoftMangleContext::mangleCXXDtorThunk(const CXXDestructorDecl *DD,
CXXDtorType Type,
const ThisAdjustment &,
llvm::raw_ostream &) {
assert(false && "Can't yet mangle destructor thunks!");
}
void MicrosoftMangleContext::mangleCXXVTable(const CXXRecordDecl *RD,
llvm::raw_ostream &) {
assert(false && "Can't yet mangle virtual tables!");
}
void MicrosoftMangleContext::mangleCXXVTT(const CXXRecordDecl *RD,
llvm::raw_ostream &) {
llvm_unreachable("The MS C++ ABI does not have virtual table tables!");
}
void MicrosoftMangleContext::mangleCXXCtorVTable(const CXXRecordDecl *RD,
int64_t Offset,
const CXXRecordDecl *Type,
llvm::raw_ostream &) {
llvm_unreachable("The MS C++ ABI does not have constructor vtables!");
}
void MicrosoftMangleContext::mangleCXXRTTI(QualType T,
llvm::raw_ostream &) {
assert(false && "Can't yet mangle RTTI!");
}
void MicrosoftMangleContext::mangleCXXRTTIName(QualType T,
llvm::raw_ostream &) {
assert(false && "Can't yet mangle RTTI names!");
}
void MicrosoftMangleContext::mangleCXXCtor(const CXXConstructorDecl *D,
CXXCtorType Type,
llvm::raw_ostream &) {
assert(false && "Can't yet mangle constructors!");
}
void MicrosoftMangleContext::mangleCXXDtor(const CXXDestructorDecl *D,
CXXDtorType Type,
llvm::raw_ostream &) {
assert(false && "Can't yet mangle destructors!");
}
void MicrosoftMangleContext::mangleReferenceTemporary(const clang::VarDecl *,
llvm::raw_ostream &) {
assert(false && "Can't yet mangle reference temporaries!");
}
MangleContext *clang::createMicrosoftMangleContext(ASTContext &Context,
Diagnostic &Diags) {
return new MicrosoftMangleContext(Context, Diags);
}
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