X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=lib%2FCodeGen%2FAsmPrinter%2FDwarfCompileUnit.cpp;h=d440a746197160ad74756194ed416b177eae1631;hp=9ae57b56bd835bcf527756e6e2bc8ef2f4ab8996;hb=1b3f9198ab3880be34b6252423b9e388b5cd6a5e;hpb=116da2fbe93861bb60ffff26dce1d0e76d9ccf15 diff --git a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp index 9ae57b56bd8..d440a746197 100644 --- a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp +++ b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp @@ -16,7 +16,10 @@ #include "DwarfCompileUnit.h" #include "DwarfDebug.h" #include "llvm/Constants.h" +#include "llvm/GlobalVariable.h" +#include "llvm/Instructions.h" #include "llvm/Analysis/DIBuilder.h" +#include "llvm/Target/Mangler.h" #include "llvm/Target/TargetData.h" #include "llvm/Target/TargetFrameLowering.h" #include "llvm/Target/TargetMachine.h" @@ -64,12 +67,19 @@ void CompileUnit::addSInt(DIE *Die, unsigned Attribute, Die->addValue(Attribute, Form, Value); } -/// addString - Add a string attribute data and value. DIEString only -/// keeps string reference. -void CompileUnit::addString(DIE *Die, unsigned Attribute, unsigned Form, - StringRef String) { - DIEValue *Value = new (DIEValueAllocator) DIEString(String); - Die->addValue(Attribute, Form, Value); +/// addString - Add a string attribute data and value. We always emit a +/// reference to the string pool instead of immediate strings so that DIEs have +/// more predictable sizes. +void CompileUnit::addString(DIE *Die, unsigned Attribute, StringRef String) { + MCSymbol *Symb = DD->getStringPoolEntry(String); + DIEValue *Value; + if (Asm->needsRelocationsForDwarfStringPool()) + Value = new (DIEValueAllocator) DIELabel(Symb); + else { + MCSymbol *StringPool = DD->getStringPool(); + Value = new (DIEValueAllocator) DIEDelta(Symb, StringPool); + } + Die->addValue(Attribute, dwarf::DW_FORM_strp, Value); } /// addLabel - Add a Dwarf label attribute data and value. @@ -95,7 +105,6 @@ void CompileUnit::addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, Die->addValue(Attribute, Form, createDIEEntry(Entry)); } - /// addBlock - Add block data. /// void CompileUnit::addBlock(DIE *Die, unsigned Attribute, unsigned Form, @@ -132,8 +141,7 @@ void CompileUnit::addSourceLine(DIE *Die, DIGlobalVariable G) { unsigned Line = G.getLineNumber(); if (Line == 0) return; - unsigned FileID = DD->GetOrCreateSourceID(G.getContext().getFilename(), - G.getContext().getDirectory()); + unsigned FileID = DD->GetOrCreateSourceID(G.getFilename(), G.getDirectory()); assert(FileID && "Invalid file id"); addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID); addUInt(Die, dwarf::DW_AT_decl_line, 0, Line); @@ -152,7 +160,8 @@ void CompileUnit::addSourceLine(DIE *Die, DISubprogram SP) { unsigned Line = SP.getLineNumber(); if (!SP.getContext().Verify()) return; - unsigned FileID = DD->GetOrCreateSourceID(SP.getFilename(), SP.getDirectory()); + unsigned FileID = DD->GetOrCreateSourceID(SP.getFilename(), + SP.getDirectory()); assert(FileID && "Invalid file id"); addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID); addUInt(Die, dwarf::DW_AT_decl_line, 0, Line); @@ -168,7 +177,8 @@ void CompileUnit::addSourceLine(DIE *Die, DIType Ty) { unsigned Line = Ty.getLineNumber(); if (Line == 0 || !Ty.getContext().Verify()) return; - unsigned FileID = DD->GetOrCreateSourceID(Ty.getFilename(), Ty.getDirectory()); + unsigned FileID = DD->GetOrCreateSourceID(Ty.getFilename(), + Ty.getDirectory()); assert(FileID && "Invalid file id"); addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID); addUInt(Die, dwarf::DW_AT_decl_line, 0, Line); @@ -192,16 +202,10 @@ void CompileUnit::addSourceLine(DIE *Die, DINameSpace NS) { addUInt(Die, dwarf::DW_AT_decl_line, 0, Line); } -/// addFrameVariableAddress - Add DW_AT_location attribute for a -/// DbgVariable based on provided frame index. -void CompileUnit::addFrameVariableAddress(DbgVariable *&DV, DIE *Die, - int64_t FI) { - MachineLocation Location; - unsigned FrameReg; - const TargetFrameLowering *TFI = Asm->TM.getFrameLowering(); - int Offset = TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg); - Location.set(FrameReg, Offset); - +/// addVariableAddress - Add DW_AT_location attribute for a +/// DbgVariable based on provided MachineLocation. +void CompileUnit::addVariableAddress(DbgVariable *&DV, DIE *Die, + MachineLocation Location) { if (DV->variableHasComplexAddress()) addComplexAddress(DV, Die, dwarf::DW_AT_location, Location); else if (DV->isBlockByrefVariable()) @@ -255,17 +259,6 @@ void CompileUnit::addAddress(DIE *Die, unsigned Attribute, addBlock(Die, Attribute, 0, Block); } -/// addRegisterAddress - Add register location entry in variable DIE. -bool CompileUnit::addRegisterAddress(DIE *Die, const MachineOperand &MO) { - assert (MO.isReg() && "Invalid machine operand!"); - if (!MO.getReg()) - return false; - MachineLocation Location; - Location.set(MO.getReg()); - addAddress(Die, dwarf::DW_AT_location, Location); - return true; -} - /// addComplexAddress - Start with the address based on the location provided, /// and generate the DWARF information necessary to find the actual variable /// given the extra address information encoded in the DIVariable, starting from @@ -275,15 +268,22 @@ void CompileUnit::addComplexAddress(DbgVariable *&DV, DIE *Die, unsigned Attribute, const MachineLocation &Location) { DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); - - if (Location.isReg()) - addRegisterOp(Block, Location.getReg()); + unsigned N = DV->getNumAddrElements(); + unsigned i = 0; + if (Location.isReg()) { + if (N >= 2 && DV->getAddrElement(0) == DIBuilder::OpPlus) { + // If first address element is OpPlus then emit + // DW_OP_breg + Offset instead of DW_OP_reg + Offset. + addRegisterOffset(Block, Location.getReg(), DV->getAddrElement(1)); + i = 2; + } else + addRegisterOp(Block, Location.getReg()); + } else addRegisterOffset(Block, Location.getReg(), Location.getOffset()); - for (unsigned i = 0, N = DV->getNumAddrElements(); i < N; ++i) { + for (;i < N; ++i) { uint64_t Element = DV->getAddrElement(i); - if (Element == DIBuilder::OpPlus) { addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst); addUInt(Block, 0, dwarf::DW_FORM_udata, DV->getAddrElement(++i)); @@ -449,12 +449,37 @@ void CompileUnit::addBlockByrefAddress(DbgVariable *&DV, DIE *Die, addBlock(Die, Attribute, 0, Block); } +/// isTypeSigned - Return true if the type is signed. +static bool isTypeSigned(DIType Ty, int *SizeInBits) { + if (Ty.isDerivedType()) + return isTypeSigned(DIDerivedType(Ty).getTypeDerivedFrom(), SizeInBits); + if (Ty.isBasicType()) + if (DIBasicType(Ty).getEncoding() == dwarf::DW_ATE_signed + || DIBasicType(Ty).getEncoding() == dwarf::DW_ATE_signed_char) { + *SizeInBits = Ty.getSizeInBits(); + return true; + } + return false; +} + /// addConstantValue - Add constant value entry in variable DIE. -bool CompileUnit::addConstantValue(DIE *Die, const MachineOperand &MO) { - assert (MO.isImm() && "Invalid machine operand!"); +bool CompileUnit::addConstantValue(DIE *Die, const MachineOperand &MO, + DIType Ty) { + assert(MO.isImm() && "Invalid machine operand!"); DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); - unsigned Imm = MO.getImm(); - addUInt(Block, 0, dwarf::DW_FORM_udata, Imm); + int SizeInBits = -1; + bool SignedConstant = isTypeSigned(Ty, &SizeInBits); + unsigned Form = SignedConstant ? dwarf::DW_FORM_sdata : dwarf::DW_FORM_udata; + switch (SizeInBits) { + case 8: Form = dwarf::DW_FORM_data1; break; + case 16: Form = dwarf::DW_FORM_data2; break; + case 32: Form = dwarf::DW_FORM_data4; break; + case 64: Form = dwarf::DW_FORM_data8; break; + default: break; + } + SignedConstant ? addSInt(Block, 0, Form, MO.getImm()) + : addUInt(Block, 0, Form, MO.getImm()); + addBlock(Die, dwarf::DW_AT_const_value, 0, Block); return true; } @@ -485,15 +510,23 @@ bool CompileUnit::addConstantFPValue(DIE *Die, const MachineOperand &MO) { } /// addConstantValue - Add constant value entry in variable DIE. -bool CompileUnit::addConstantValue(DIE *Die, ConstantInt *CI, +bool CompileUnit::addConstantValue(DIE *Die, const ConstantInt *CI, bool Unsigned) { - if (CI->getBitWidth() <= 64) { + unsigned CIBitWidth = CI->getBitWidth(); + if (CIBitWidth <= 64) { + unsigned form = 0; + switch (CIBitWidth) { + case 8: form = dwarf::DW_FORM_data1; break; + case 16: form = dwarf::DW_FORM_data2; break; + case 32: form = dwarf::DW_FORM_data4; break; + case 64: form = dwarf::DW_FORM_data8; break; + default: + form = Unsigned ? dwarf::DW_FORM_udata : dwarf::DW_FORM_sdata; + } if (Unsigned) - addUInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_udata, - CI->getZExtValue()); + addUInt(Die, dwarf::DW_AT_const_value, form, CI->getZExtValue()); else - addSInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, - CI->getSExtValue()); + addSInt(Die, dwarf::DW_AT_const_value, form, CI->getSExtValue()); return true; } @@ -501,18 +534,20 @@ bool CompileUnit::addConstantValue(DIE *Die, ConstantInt *CI, // Get the raw data form of the large APInt. const APInt Val = CI->getValue(); - const char *Ptr = (const char*)Val.getRawData(); + const uint64_t *Ptr64 = Val.getRawData(); int NumBytes = Val.getBitWidth() / 8; // 8 bits per byte. bool LittleEndian = Asm->getTargetData().isLittleEndian(); - int Incr = (LittleEndian ? 1 : -1); - int Start = (LittleEndian ? 0 : NumBytes - 1); - int Stop = (LittleEndian ? NumBytes : -1); // Output the constant to DWARF one byte at a time. - for (; Start != Stop; Start += Incr) - addUInt(Block, 0, dwarf::DW_FORM_data1, - (unsigned char)0xFF & Ptr[Start]); + for (int i = 0; i < NumBytes; i++) { + uint8_t c; + if (LittleEndian) + c = Ptr64[i / 8] >> (8 * (i & 7)); + else + c = Ptr64[(NumBytes - 1 - i) / 8] >> (8 * ((NumBytes - 1 - i) & 7)); + addUInt(Block, 0, dwarf::DW_FORM_data1, c); + } addBlock(Die, dwarf::DW_AT_const_value, 0, Block); return true; @@ -530,8 +565,8 @@ void CompileUnit::addTemplateParams(DIE &Buffer, DIArray TParams) { Buffer.addChild(getOrCreateTemplateValueParameterDIE( DITemplateValueParameter(Element))); } - } + /// addToContextOwner - Add Die into the list of its context owner's children. void CompileUnit::addToContextOwner(DIE *Die, DIDescriptor Context) { if (Context.isType()) { @@ -541,7 +576,7 @@ void CompileUnit::addToContextOwner(DIE *Die, DIDescriptor Context) { DIE *ContextDIE = getOrCreateNameSpace(DINameSpace(Context)); ContextDIE->addChild(Die); } else if (Context.isSubprogram()) { - DIE *ContextDIE = DD->createSubprogramDIE(DISubprogram(Context)); + DIE *ContextDIE = getOrCreateSubprogramDIE(DISubprogram(Context)); ContextDIE->addChild(Die); } else if (DIE *ContextDIE = getDIE(Context)) ContextDIE->addChild(Die); @@ -551,7 +586,10 @@ void CompileUnit::addToContextOwner(DIE *Die, DIDescriptor Context) { /// getOrCreateTypeDIE - Find existing DIE or create new DIE for the /// given DIType. -DIE *CompileUnit::getOrCreateTypeDIE(DIType Ty) { +DIE *CompileUnit::getOrCreateTypeDIE(const MDNode *TyNode) { + DIType Ty(TyNode); + if (!Ty.Verify()) + return NULL; DIE *TyDIE = getDIE(Ty); if (TyDIE) return TyDIE; @@ -567,7 +605,11 @@ DIE *CompileUnit::getOrCreateTypeDIE(DIType Ty) { assert(Ty.isDerivedType() && "Unknown kind of DIType"); constructTypeDIE(*TyDIE, DIDerivedType(Ty)); } - + // If this is a named finished type then include it in the list of types + // for the accelerator tables. + if (!Ty.getName().empty() && !Ty.isForwardDecl()) + addAccelType(Ty.getName(), TyDIE); + addToContextOwner(TyDIE, Ty.getContext()); return TyDIE; } @@ -591,21 +633,58 @@ void CompileUnit::addType(DIE *Entity, DIType Ty) { // Set up proxy. Entry = createDIEEntry(Buffer); insertDIEEntry(Ty, Entry); - Entity->addValue(dwarf::DW_AT_type, dwarf::DW_FORM_ref4, Entry); + + // If this is a complete composite type then include it in the + // list of global types. + addGlobalType(Ty); +} + +/// addGlobalType - Add a new global type to the compile unit. +/// +void CompileUnit::addGlobalType(DIType Ty) { + DIDescriptor Context = Ty.getContext(); + if (Ty.isCompositeType() && !Ty.getName().empty() && !Ty.isForwardDecl() + && (!Context || Context.isCompileUnit() || Context.isFile() + || Context.isNameSpace())) + if (DIEEntry *Entry = getDIEEntry(Ty)) + GlobalTypes[Ty.getName()] = Entry->getEntry(); +} + +/// addPubTypes - Add type for pubtypes section. +void CompileUnit::addPubTypes(DISubprogram SP) { + DICompositeType SPTy = SP.getType(); + unsigned SPTag = SPTy.getTag(); + if (SPTag != dwarf::DW_TAG_subroutine_type) + return; + + DIArray Args = SPTy.getTypeArray(); + for (unsigned i = 0, e = Args.getNumElements(); i != e; ++i) { + DIType ATy(Args.getElement(i)); + if (!ATy.Verify()) + continue; + addGlobalType(ATy); + } } /// constructTypeDIE - Construct basic type die from DIBasicType. void CompileUnit::constructTypeDIE(DIE &Buffer, DIBasicType BTy) { // Get core information. StringRef Name = BTy.getName(); - Buffer.setTag(dwarf::DW_TAG_base_type); - addUInt(&Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, - BTy.getEncoding()); - // Add name if not anonymous or intermediate type. if (!Name.empty()) - addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); + addString(&Buffer, dwarf::DW_AT_name, Name); + + if (BTy.getTag() == dwarf::DW_TAG_unspecified_type) { + Buffer.setTag(dwarf::DW_TAG_unspecified_type); + // Unspecified types has only name, nothing else. + return; + } + + Buffer.setTag(dwarf::DW_TAG_base_type); + addUInt(&Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1, + BTy.getEncoding()); + uint64_t Size = BTy.getSizeInBits() >> 3; addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size); } @@ -628,7 +707,7 @@ void CompileUnit::constructTypeDIE(DIE &Buffer, DIDerivedType DTy) { // Add name if not anonymous or intermediate type. if (!Name.empty()) - addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); + addString(&Buffer, dwarf::DW_AT_name, Name); // Add size if non-zero (derived types might be zero-sized.) if (Size) @@ -709,7 +788,7 @@ void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) { DIE *ElemDie = NULL; if (Element.isSubprogram()) { DISubprogram SP(Element); - ElemDie = DD->createSubprogramDIE(DISubprogram(Element)); + ElemDie = getOrCreateSubprogramDIE(DISubprogram(Element)); if (SP.isProtected()) addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, dwarf::DW_ACCESS_protected); @@ -725,8 +804,7 @@ void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) { else if (Element.isVariable()) { DIVariable DV(Element); ElemDie = new DIE(dwarf::DW_TAG_variable); - addString(ElemDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, - DV.getName()); + addString(ElemDie, dwarf::DW_AT_name, DV.getName()); addType(ElemDie, DV.getType()); addUInt(ElemDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1); addUInt(ElemDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1); @@ -755,6 +833,10 @@ void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) { addToContextOwner(&Buffer, Context); } + if (CTy.isObjcClassComplete()) + addUInt(&Buffer, dwarf::DW_AT_APPLE_objc_complete_type, + dwarf::DW_FORM_flag, 1); + if (Tag == dwarf::DW_TAG_class_type) addTemplateParams(Buffer, CTy.getTemplateParams()); @@ -766,11 +848,11 @@ void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) { // Add name if not anonymous or intermediate type. if (!Name.empty()) - addString(&Buffer, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); + addString(&Buffer, dwarf::DW_AT_name, Name); if (Tag == dwarf::DW_TAG_enumeration_type || Tag == dwarf::DW_TAG_class_type || Tag == dwarf::DW_TAG_structure_type || Tag == dwarf::DW_TAG_union_type) - { + { // Add size if non-zero (derived types might be zero-sized.) if (Size) addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size); @@ -798,7 +880,7 @@ CompileUnit::getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP) { ParamDIE = new DIE(dwarf::DW_TAG_template_type_parameter); addType(ParamDIE, TP.getType()); - addString(ParamDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, TP.getName()); + addString(ParamDIE, dwarf::DW_AT_name, TP.getName()); return ParamDIE; } @@ -813,12 +895,246 @@ CompileUnit::getOrCreateTemplateValueParameterDIE(DITemplateValueParameter TPV) ParamDIE = new DIE(dwarf::DW_TAG_template_value_parameter); addType(ParamDIE, TPV.getType()); if (!TPV.getName().empty()) - addString(ParamDIE, dwarf::DW_AT_name, dwarf::DW_FORM_string, TPV.getName()); + addString(ParamDIE, dwarf::DW_AT_name, TPV.getName()); addUInt(ParamDIE, dwarf::DW_AT_const_value, dwarf::DW_FORM_udata, TPV.getValue()); return ParamDIE; } +/// getOrCreateNameSpace - Create a DIE for DINameSpace. +DIE *CompileUnit::getOrCreateNameSpace(DINameSpace NS) { + DIE *NDie = getDIE(NS); + if (NDie) + return NDie; + NDie = new DIE(dwarf::DW_TAG_namespace); + insertDIE(NS, NDie); + if (!NS.getName().empty()) { + addString(NDie, dwarf::DW_AT_name, NS.getName()); + addAccelNamespace(NS.getName(), NDie); + } else + addAccelNamespace("(anonymous namespace)", NDie); + addSourceLine(NDie, NS); + addToContextOwner(NDie, NS.getContext()); + return NDie; +} + +/// getRealLinkageName - If special LLVM prefix that is used to inform the asm +/// printer to not emit usual symbol prefix before the symbol name is used then +/// return linkage name after skipping this special LLVM prefix. +static StringRef getRealLinkageName(StringRef LinkageName) { + char One = '\1'; + if (LinkageName.startswith(StringRef(&One, 1))) + return LinkageName.substr(1); + return LinkageName; +} + +/// getOrCreateSubprogramDIE - Create new DIE using SP. +DIE *CompileUnit::getOrCreateSubprogramDIE(DISubprogram SP) { + DIE *SPDie = getDIE(SP); + if (SPDie) + return SPDie; + + SPDie = new DIE(dwarf::DW_TAG_subprogram); + + // DW_TAG_inlined_subroutine may refer to this DIE. + insertDIE(SP, SPDie); + + // Add to context owner. + addToContextOwner(SPDie, SP.getContext()); + + // Add function template parameters. + addTemplateParams(*SPDie, SP.getTemplateParams()); + + StringRef LinkageName = SP.getLinkageName(); + if (!LinkageName.empty()) + addString(SPDie, dwarf::DW_AT_MIPS_linkage_name, + getRealLinkageName(LinkageName)); + + // If this DIE is going to refer declaration info using AT_specification + // then there is no need to add other attributes. + if (SP.getFunctionDeclaration().isSubprogram()) + return SPDie; + + // Constructors and operators for anonymous aggregates do not have names. + if (!SP.getName().empty()) + addString(SPDie, dwarf::DW_AT_name, SP.getName()); + + addSourceLine(SPDie, SP); + + if (SP.isPrototyped()) + addUInt(SPDie, dwarf::DW_AT_prototyped, dwarf::DW_FORM_flag, 1); + + // Add Return Type. + DICompositeType SPTy = SP.getType(); + DIArray Args = SPTy.getTypeArray(); + unsigned SPTag = SPTy.getTag(); + + if (Args.getNumElements() == 0 || SPTag != dwarf::DW_TAG_subroutine_type) + addType(SPDie, SPTy); + else + addType(SPDie, DIType(Args.getElement(0))); + + unsigned VK = SP.getVirtuality(); + if (VK) { + addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_flag, VK); + DIEBlock *Block = getDIEBlock(); + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu); + addUInt(Block, 0, dwarf::DW_FORM_udata, SP.getVirtualIndex()); + addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, 0, Block); + ContainingTypeMap.insert(std::make_pair(SPDie, + SP.getContainingType())); + } + + if (!SP.isDefinition()) { + addUInt(SPDie, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, 1); + + // Add arguments. Do not add arguments for subprogram definition. They will + // be handled while processing variables. + DICompositeType SPTy = SP.getType(); + DIArray Args = SPTy.getTypeArray(); + unsigned SPTag = SPTy.getTag(); + + if (SPTag == dwarf::DW_TAG_subroutine_type) + for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) { + DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter); + DIType ATy = DIType(DIType(Args.getElement(i))); + addType(Arg, ATy); + if (ATy.isArtificial()) + addUInt(Arg, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); + SPDie->addChild(Arg); + } + } + + if (SP.isArtificial()) + addUInt(SPDie, dwarf::DW_AT_artificial, dwarf::DW_FORM_flag, 1); + + if (!SP.isLocalToUnit()) + addUInt(SPDie, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1); + + if (SP.isOptimized()) + addUInt(SPDie, dwarf::DW_AT_APPLE_optimized, dwarf::DW_FORM_flag, 1); + + if (unsigned isa = Asm->getISAEncoding()) { + addUInt(SPDie, dwarf::DW_AT_APPLE_isa, dwarf::DW_FORM_flag, isa); + } + + return SPDie; +} + +// Return const expression if value is a GEP to access merged global +// constant. e.g. +// i8* getelementptr ({ i8, i8, i8, i8 }* @_MergedGlobals, i32 0, i32 0) +static const ConstantExpr *getMergedGlobalExpr(const Value *V) { + const ConstantExpr *CE = dyn_cast_or_null(V); + if (!CE || CE->getNumOperands() != 3 || + CE->getOpcode() != Instruction::GetElementPtr) + return NULL; + + // First operand points to a global struct. + Value *Ptr = CE->getOperand(0); + if (!isa(Ptr) || + !isa(cast(Ptr->getType())->getElementType())) + return NULL; + + // Second operand is zero. + const ConstantInt *CI = dyn_cast_or_null(CE->getOperand(1)); + if (!CI || !CI->isZero()) + return NULL; + + // Third operand is offset. + if (!isa(CE->getOperand(2))) + return NULL; + + return CE; +} + +/// createGlobalVariableDIE - create global variable DIE. +void CompileUnit::createGlobalVariableDIE(const MDNode *N) { + // Check for pre-existence. + if (getDIE(N)) + return; + + DIGlobalVariable GV(N); + if (!GV.Verify()) + return; + + DIE *VariableDIE = new DIE(GV.getTag()); + // Add to map. + insertDIE(N, VariableDIE); + + // Add name. + addString(VariableDIE, dwarf::DW_AT_name, GV.getDisplayName()); + StringRef LinkageName = GV.getLinkageName(); + bool isGlobalVariable = GV.getGlobal() != NULL; + if (!LinkageName.empty() && isGlobalVariable) + addString(VariableDIE, dwarf::DW_AT_MIPS_linkage_name, + getRealLinkageName(LinkageName)); + // Add type. + DIType GTy = GV.getType(); + addType(VariableDIE, GTy); + + // Add scoping info. + if (!GV.isLocalToUnit()) + addUInt(VariableDIE, dwarf::DW_AT_external, dwarf::DW_FORM_flag, 1); + + // Add line number info. + addSourceLine(VariableDIE, GV); + // Add to context owner. + DIDescriptor GVContext = GV.getContext(); + addToContextOwner(VariableDIE, GVContext); + // Add location. + bool addToAccelTable = false; + if (isGlobalVariable) { + addToAccelTable = true; + DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr); + addLabel(Block, 0, dwarf::DW_FORM_udata, + Asm->Mang->getSymbol(GV.getGlobal())); + // Do not create specification DIE if context is either compile unit + // or a subprogram. + if (GVContext && GV.isDefinition() && !GVContext.isCompileUnit() && + !GVContext.isFile() && !isSubprogramContext(GVContext)) { + // Create specification DIE. + DIE *VariableSpecDIE = new DIE(dwarf::DW_TAG_variable); + addDIEEntry(VariableSpecDIE, dwarf::DW_AT_specification, + dwarf::DW_FORM_ref4, VariableDIE); + addBlock(VariableSpecDIE, dwarf::DW_AT_location, 0, Block); + addUInt(VariableDIE, dwarf::DW_AT_declaration, dwarf::DW_FORM_flag, + 1); + addDie(VariableSpecDIE); + } else { + addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block); + } + } else if (const ConstantInt *CI = + dyn_cast_or_null(GV.getConstant())) + addConstantValue(VariableDIE, CI, GTy.isUnsignedDIType()); + else if (const ConstantExpr *CE = getMergedGlobalExpr(N->getOperand(11))) { + addToAccelTable = true; + // GV is a merged global. + DIEBlock *Block = new (DIEValueAllocator) DIEBlock(); + Value *Ptr = CE->getOperand(0); + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr); + addLabel(Block, 0, dwarf::DW_FORM_udata, + Asm->Mang->getSymbol(cast(Ptr))); + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu); + SmallVector Idx(CE->op_begin()+1, CE->op_end()); + addUInt(Block, 0, dwarf::DW_FORM_udata, + Asm->getTargetData().getIndexedOffset(Ptr->getType(), Idx)); + addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus); + addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block); + } + + if (addToAccelTable) + addAccelName(GV.getName(), VariableDIE); + + // If the linkage name is different than the name, go ahead and output + // that as well into the name table. + if (GV.getLinkageName() != "" && GV.getName() != GV.getLinkageName()) + addAccelName(GV.getLinkageName(), VariableDIE); + + return; +} + /// constructSubrangeDIE - Construct subrange DIE from DISubrange. void CompileUnit::constructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy){ DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type); @@ -877,18 +1193,139 @@ void CompileUnit::constructArrayTypeDIE(DIE &Buffer, DIE *CompileUnit::constructEnumTypeDIE(DIEnumerator ETy) { DIE *Enumerator = new DIE(dwarf::DW_TAG_enumerator); StringRef Name = ETy.getName(); - addString(Enumerator, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); + addString(Enumerator, dwarf::DW_AT_name, Name); int64_t Value = ETy.getEnumValue(); addSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, Value); return Enumerator; } +/// constructContainingTypeDIEs - Construct DIEs for types that contain +/// vtables. +void CompileUnit::constructContainingTypeDIEs() { + for (DenseMap::iterator CI = ContainingTypeMap.begin(), + CE = ContainingTypeMap.end(); CI != CE; ++CI) { + DIE *SPDie = CI->first; + const MDNode *N = CI->second; + if (!N) continue; + DIE *NDie = getDIE(N); + if (!NDie) continue; + addDIEEntry(SPDie, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4, NDie); + } +} + +/// constructVariableDIE - Construct a DIE for the given DbgVariable. +DIE *CompileUnit::constructVariableDIE(DbgVariable *DV, bool isScopeAbstract) { + StringRef Name = DV->getName(); + if (Name.empty()) + return NULL; + + // Translate tag to proper Dwarf tag. + unsigned Tag = DV->getTag(); + + // Define variable debug information entry. + DIE *VariableDie = new DIE(Tag); + DbgVariable *AbsVar = DV->getAbstractVariable(); + DIE *AbsDIE = AbsVar ? AbsVar->getDIE() : NULL; + if (AbsDIE) + addDIEEntry(VariableDie, dwarf::DW_AT_abstract_origin, + dwarf::DW_FORM_ref4, AbsDIE); + else { + addString(VariableDie, dwarf::DW_AT_name, Name); + addSourceLine(VariableDie, DV->getVariable()); + addType(VariableDie, DV->getType()); + } + + if (DV->isArtificial()) + addUInt(VariableDie, dwarf::DW_AT_artificial, + dwarf::DW_FORM_flag, 1); + + if (isScopeAbstract) { + DV->setDIE(VariableDie); + return VariableDie; + } + + // Add variable address. + + unsigned Offset = DV->getDotDebugLocOffset(); + if (Offset != ~0U) { + addLabel(VariableDie, dwarf::DW_AT_location, + dwarf::DW_FORM_data4, + Asm->GetTempSymbol("debug_loc", Offset)); + DV->setDIE(VariableDie); + return VariableDie; + } + + // Check if variable is described by a DBG_VALUE instruction. + if (const MachineInstr *DVInsn = DV->getMInsn()) { + bool updated = false; + if (DVInsn->getNumOperands() == 3) { + if (DVInsn->getOperand(0).isReg()) { + const MachineOperand RegOp = DVInsn->getOperand(0); + const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo(); + if (DVInsn->getOperand(1).isImm() && + TRI->getFrameRegister(*Asm->MF) == RegOp.getReg()) { + unsigned FrameReg = 0; + const TargetFrameLowering *TFI = Asm->TM.getFrameLowering(); + int Offset = + TFI->getFrameIndexReference(*Asm->MF, + DVInsn->getOperand(1).getImm(), + FrameReg); + MachineLocation Location(FrameReg, Offset); + addVariableAddress(DV, VariableDie, Location); + + } else if (RegOp.getReg()) + addVariableAddress(DV, VariableDie, + MachineLocation(RegOp.getReg())); + updated = true; + } + else if (DVInsn->getOperand(0).isImm()) + updated = + addConstantValue(VariableDie, DVInsn->getOperand(0), + DV->getType()); + else if (DVInsn->getOperand(0).isFPImm()) + updated = + addConstantFPValue(VariableDie, DVInsn->getOperand(0)); + else if (DVInsn->getOperand(0).isCImm()) + updated = + addConstantValue(VariableDie, + DVInsn->getOperand(0).getCImm(), + DV->getType().isUnsignedDIType()); + } else { + addVariableAddress(DV, VariableDie, + Asm->getDebugValueLocation(DVInsn)); + updated = true; + } + if (!updated) { + // If variableDie is not updated then DBG_VALUE instruction does not + // have valid variable info. + delete VariableDie; + return NULL; + } + DV->setDIE(VariableDie); + return VariableDie; + } else { + // .. else use frame index. + int FI = DV->getFrameIndex(); + if (FI != ~0) { + unsigned FrameReg = 0; + const TargetFrameLowering *TFI = Asm->TM.getFrameLowering(); + int Offset = + TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg); + MachineLocation Location(FrameReg, Offset); + addVariableAddress(DV, VariableDie, Location); + } + } + + DV->setDIE(VariableDie); + return VariableDie; +} + /// createMemberDIE - Create new member DIE. DIE *CompileUnit::createMemberDIE(DIDerivedType DT) { DIE *MemberDie = new DIE(DT.getTag()); StringRef Name = DT.getName(); if (!Name.empty()) - addString(MemberDie, dwarf::DW_AT_name, dwarf::DW_FORM_string, Name); + addString(MemberDie, dwarf::DW_AT_name, Name); addType(MemberDie, DT.getTypeDerivedFrom()); @@ -952,7 +1389,7 @@ DIE *CompileUnit::createMemberDIE(DIDerivedType DT) { addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, dwarf::DW_ACCESS_private); // Otherwise C++ member and base classes are considered public. - else if (DT.getCompileUnit().getLanguage() == dwarf::DW_LANG_C_plus_plus) + else addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_flag, dwarf::DW_ACCESS_public); if (DT.isVirtual()) @@ -962,16 +1399,13 @@ DIE *CompileUnit::createMemberDIE(DIDerivedType DT) { // Objective-C properties. StringRef PropertyName = DT.getObjCPropertyName(); if (!PropertyName.empty()) { - addString(MemberDie, dwarf::DW_AT_APPLE_property_name, dwarf::DW_FORM_string, - PropertyName); + addString(MemberDie, dwarf::DW_AT_APPLE_property_name, PropertyName); StringRef GetterName = DT.getObjCPropertyGetterName(); if (!GetterName.empty()) - addString(MemberDie, dwarf::DW_AT_APPLE_property_getter, - dwarf::DW_FORM_string, GetterName); + addString(MemberDie, dwarf::DW_AT_APPLE_property_getter, GetterName); StringRef SetterName = DT.getObjCPropertySetterName(); if (!SetterName.empty()) - addString(MemberDie, dwarf::DW_AT_APPLE_property_setter, - dwarf::DW_FORM_string, SetterName); + addString(MemberDie, dwarf::DW_AT_APPLE_property_setter, SetterName); unsigned PropertyAttributes = 0; if (DT.isReadOnlyObjCProperty()) PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readonly;