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MicrosoftCXXABI.cpp
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//===--- MicrosoftCXXABI.cpp - Emit LLVM Code from ASTs for a Module ------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This provides C++ code generation targetting the Microsoft Visual C++ ABI.
// The class in this file generates structures that follow the Microsoft
// Visual C++ ABI, which is actually not very well documented at all outside
// of Microsoft.
//
//===----------------------------------------------------------------------===//
#include "CGCXXABI.h"
#include "CodeGenModule.h"
#include "Mangle.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclCXX.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/ExprCXX.h"
#include "CGVTables.h"
using namespace clang;
using namespace CodeGen;
namespace {
/// MicrosoftCXXNameMangler - Manage the mangling of a single name for the
/// Microsoft Visual C++ ABI.
class MicrosoftCXXNameMangler {
MangleContext &Context;
llvm::raw_svector_ostream Out;
ASTContext &getASTContext() const { return Context.getASTContext(); }
public:
MicrosoftCXXNameMangler(MangleContext &C, llvm::SmallVectorImpl<char> &Res)
: Context(C), Out(Res) { }
llvm::raw_svector_ostream &getStream() { return 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);
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::SmallVectorImpl<char> &);
virtual void mangleThunk(const CXXMethodDecl *MD,
const ThunkInfo &Thunk,
llvm::SmallVectorImpl<char> &);
virtual void mangleCXXDtorThunk(const CXXDestructorDecl *DD, CXXDtorType Type,
const ThisAdjustment &ThisAdjustment,
llvm::SmallVectorImpl<char> &);
virtual void mangleGuardVariable(const VarDecl *D,
llvm::SmallVectorImpl<char> &);
virtual void mangleCXXVTable(const CXXRecordDecl *RD,
llvm::SmallVectorImpl<char> &);
virtual void mangleCXXVTT(const CXXRecordDecl *RD,
llvm::SmallVectorImpl<char> &);
virtual void mangleCXXCtorVTable(const CXXRecordDecl *RD, int64_t Offset,
const CXXRecordDecl *Type,
llvm::SmallVectorImpl<char> &);
virtual void mangleCXXRTTI(QualType T, llvm::SmallVectorImpl<char> &);
virtual void mangleCXXRTTIName(QualType T, llvm::SmallVectorImpl<char> &);
virtual void mangleCXXCtor(const CXXConstructorDecl *D, CXXCtorType Type,
llvm::SmallVectorImpl<char> &);
virtual void mangleCXXDtor(const CXXDestructorDecl *D, CXXDtorType Type,
llvm::SmallVectorImpl<char> &);
};
class MicrosoftCXXABI : public CXXABI {
MicrosoftMangleContext MangleCtx;
public:
MicrosoftCXXABI(CodeGenModule &CGM)
: MangleCtx(CGM.getContext(), CGM.getDiags()) {}
MicrosoftMangleContext &getMangleContext() {
return MangleCtx;
}
};
}
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(static_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 TypedefDecl *D = TD->getTypedefForAnonDecl()) {
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)) {
llvm::SmallString<64> Name;
Context.mangleBlock(GlobalDecl(), BD, Name);
Out << Name << '@';
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) {
llvm::SmallString<64> Buffer;
MiscNameMangler(Context, Buffer).mangleObjCMethodName(MD);
Out << Buffer;
}
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)
// <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()) {
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()) {
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: Out << "_W"; break;
case BuiltinType::Overload:
case BuiltinType::Dependent:
assert(false &&
"Overloaded and dependent types shouldn't get to name mangling");
break;
case BuiltinType::UndeducedAuto:
assert(0 && "Should not see undeduced auto here");
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);
// <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) {
// <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.)
switch (T->getCallConv()) {
case CC_Default:
case CC_C: Out << 'A'; 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());