diff options
Diffstat (limited to 'lib/CodeGen/AsmPrinter/DwarfWriter.cpp')
| -rw-r--r-- | lib/CodeGen/AsmPrinter/DwarfWriter.cpp | 2798 |
1 files changed, 2 insertions, 2796 deletions
diff --git a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp index 71f73a59f5..483ee559ff 100644 --- a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp +++ b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp @@ -12,2810 +12,16 @@ //===----------------------------------------------------------------------===// #include "llvm/CodeGen/DwarfWriter.h" -#include "DIE.h" +#include "DwarfDebug.h" #include "DwarfException.h" -#include "DwarfPrinter.h" -#include "llvm/Module.h" -#include "llvm/DerivedTypes.h" -#include "llvm/Constants.h" -#include "llvm/CodeGen/AsmPrinter.h" #include "llvm/CodeGen/MachineModuleInfo.h" -#include "llvm/CodeGen/MachineFrameInfo.h" -#include "llvm/CodeGen/MachineLocation.h" -#include "llvm/Analysis/DebugInfo.h" -#include "llvm/Support/Debug.h" -#include "llvm/Support/Dwarf.h" -#include "llvm/Support/CommandLine.h" -#include "llvm/Support/DataTypes.h" -#include "llvm/Support/Mangler.h" -#include "llvm/Support/Timer.h" -#include "llvm/Support/raw_ostream.h" -#include "llvm/System/Path.h" -#include "llvm/Target/TargetAsmInfo.h" -#include "llvm/Target/TargetRegisterInfo.h" -#include "llvm/Target/TargetData.h" -#include "llvm/Target/TargetFrameInfo.h" -#include "llvm/Target/TargetInstrInfo.h" -#include "llvm/Target/TargetMachine.h" -#include "llvm/Target/TargetOptions.h" -#include "llvm/ADT/DenseMap.h" -#include "llvm/ADT/FoldingSet.h" -#include "llvm/ADT/StringExtras.h" -#include "llvm/ADT/StringMap.h" -#include <ostream> -#include <string> + using namespace llvm; -using namespace llvm::dwarf; static RegisterPass<DwarfWriter> X("dwarfwriter", "DWARF Information Writer"); char DwarfWriter::ID = 0; -static TimerGroup &getDwarfTimerGroup() { - static TimerGroup DwarfTimerGroup("Dwarf Exception and Debugging"); - return DwarfTimerGroup; -} - -namespace llvm { - -//===----------------------------------------------------------------------===// - -/// Configuration values for initial hash set sizes (log2). -/// -static const unsigned InitDiesSetSize = 9; // log2(512) -static const unsigned InitAbbreviationsSetSize = 9; // log2(512) -static const unsigned InitValuesSetSize = 9; // log2(512) - -//===----------------------------------------------------------------------===// -/// CompileUnit - This dwarf writer support class manages information associate -/// with a source file. -class VISIBILITY_HIDDEN CompileUnit { - /// ID - File identifier for source. - /// - unsigned ID; - - /// Die - Compile unit debug information entry. - /// - DIE *Die; - - /// GVToDieMap - Tracks the mapping of unit level debug informaton - /// variables to debug information entries. - std::map<GlobalVariable *, DIE *> GVToDieMap; - - /// GVToDIEEntryMap - Tracks the mapping of unit level debug informaton - /// descriptors to debug information entries using a DIEEntry proxy. - std::map<GlobalVariable *, DIEEntry *> GVToDIEEntryMap; - - /// Globals - A map of globally visible named entities for this unit. - /// - StringMap<DIE*> Globals; - - /// DiesSet - Used to uniquely define dies within the compile unit. - /// - FoldingSet<DIE> DiesSet; -public: - CompileUnit(unsigned I, DIE *D) - : ID(I), Die(D), GVToDieMap(), - GVToDIEEntryMap(), Globals(), DiesSet(InitDiesSetSize) - {} - - ~CompileUnit() { - delete Die; - } - - // Accessors. - unsigned getID() const { return ID; } - DIE* getDie() const { return Die; } - StringMap<DIE*> &getGlobals() { return Globals; } - - /// hasContent - Return true if this compile unit has something to write out. - /// - bool hasContent() const { - return !Die->getChildren().empty(); - } - - /// AddGlobal - Add a new global entity to the compile unit. - /// - void AddGlobal(const std::string &Name, DIE *Die) { - Globals[Name] = Die; - } - - /// getDieMapSlotFor - Returns the debug information entry map slot for the - /// specified debug variable. - DIE *&getDieMapSlotFor(GlobalVariable *GV) { - return GVToDieMap[GV]; - } - - /// getDIEEntrySlotFor - Returns the debug information entry proxy slot for the - /// specified debug variable. - DIEEntry *&getDIEEntrySlotFor(GlobalVariable *GV) { - return GVToDIEEntryMap[GV]; - } - - /// AddDie - Adds or interns the DIE to the compile unit. - /// - DIE *AddDie(DIE &Buffer) { - FoldingSetNodeID ID; - Buffer.Profile(ID); - void *Where; - DIE *Die = DiesSet.FindNodeOrInsertPos(ID, Where); - - if (!Die) { - Die = new DIE(Buffer); - DiesSet.InsertNode(Die, Where); - this->Die->AddChild(Die); - Buffer.Detach(); - } - - return Die; - } -}; - -//===----------------------------------------------------------------------===// -/// SrcLineInfo - This class is used to record source line correspondence. -/// -class VISIBILITY_HIDDEN SrcLineInfo { - unsigned Line; // Source line number. - unsigned Column; // Source column. - unsigned SourceID; // Source ID number. - unsigned LabelID; // Label in code ID number. -public: - SrcLineInfo(unsigned L, unsigned C, unsigned S, unsigned I) - : Line(L), Column(C), SourceID(S), LabelID(I) {} - - // Accessors - unsigned getLine() const { return Line; } - unsigned getColumn() const { return Column; } - unsigned getSourceID() const { return SourceID; } - unsigned getLabelID() const { return LabelID; } -}; - -//===----------------------------------------------------------------------===// -/// DbgVariable - This class is used to track local variable information. -/// -class VISIBILITY_HIDDEN DbgVariable { - DIVariable Var; // Variable Descriptor. - unsigned FrameIndex; // Variable frame index. -public: - DbgVariable(DIVariable V, unsigned I) : Var(V), FrameIndex(I) {} - - // Accessors. - DIVariable getVariable() const { return Var; } - unsigned getFrameIndex() const { return FrameIndex; } -}; - -//===----------------------------------------------------------------------===// -/// DbgScope - This class is used to track scope information. -/// -class DbgConcreteScope; -class VISIBILITY_HIDDEN DbgScope { - DbgScope *Parent; // Parent to this scope. - DIDescriptor Desc; // Debug info descriptor for scope. - // Either subprogram or block. - unsigned StartLabelID; // Label ID of the beginning of scope. - unsigned EndLabelID; // Label ID of the end of scope. - SmallVector<DbgScope *, 4> Scopes; // Scopes defined in scope. - SmallVector<DbgVariable *, 8> Variables;// Variables declared in scope. - SmallVector<DbgConcreteScope *, 8> ConcreteInsts;// Concrete insts of funcs. -public: - DbgScope(DbgScope *P, DIDescriptor D) - : Parent(P), Desc(D), StartLabelID(0), EndLabelID(0) {} - virtual ~DbgScope(); - - // Accessors. - DbgScope *getParent() const { return Parent; } - DIDescriptor getDesc() const { return Desc; } - unsigned getStartLabelID() const { return StartLabelID; } - unsigned getEndLabelID() const { return EndLabelID; } - SmallVector<DbgScope *, 4> &getScopes() { return Scopes; } - SmallVector<DbgVariable *, 8> &getVariables() { return Variables; } - SmallVector<DbgConcreteScope*,8> &getConcreteInsts() { return ConcreteInsts; } - void setStartLabelID(unsigned S) { StartLabelID = S; } - void setEndLabelID(unsigned E) { EndLabelID = E; } - - /// AddScope - Add a scope to the scope. - /// - void AddScope(DbgScope *S) { Scopes.push_back(S); } - - /// AddVariable - Add a variable to the scope. - /// - void AddVariable(DbgVariable *V) { Variables.push_back(V); } - - /// AddConcreteInst - Add a concrete instance to the scope. - /// - void AddConcreteInst(DbgConcreteScope *C) { ConcreteInsts.push_back(C); } - -#ifndef NDEBUG - void dump() const; -#endif -}; - -#ifndef NDEBUG -void DbgScope::dump() const { - static unsigned IndentLevel = 0; - std::string Indent(IndentLevel, ' '); - - cerr << Indent; Desc.dump(); - cerr << " [" << StartLabelID << ", " << EndLabelID << "]\n"; - - IndentLevel += 2; - - for (unsigned i = 0, e = Scopes.size(); i != e; ++i) - if (Scopes[i] != this) - Scopes[i]->dump(); - - IndentLevel -= 2; -} -#endif - -//===----------------------------------------------------------------------===// -/// DbgConcreteScope - This class is used to track a scope that holds concrete -/// instance information. -/// -class VISIBILITY_HIDDEN DbgConcreteScope : public DbgScope { - CompileUnit *Unit; - DIE *Die; // Debug info for this concrete scope. -public: - DbgConcreteScope(DIDescriptor D) : DbgScope(NULL, D) {} - - // Accessors. - DIE *getDie() const { return Die; } - void setDie(DIE *D) { Die = D; } -}; - -DbgScope::~DbgScope() { - for (unsigned i = 0, N = Scopes.size(); i < N; ++i) - delete Scopes[i]; - for (unsigned j = 0, M = Variables.size(); j < M; ++j) - delete Variables[j]; - for (unsigned k = 0, O = ConcreteInsts.size(); k < O; ++k) - delete ConcreteInsts[k]; -} - -//===----------------------------------------------------------------------===// -/// DwarfDebug - Emits Dwarf debug directives. -/// -class VISIBILITY_HIDDEN DwarfDebug : public Dwarf { - //===--------------------------------------------------------------------===// - // Attributes used to construct specific Dwarf sections. - // - - /// CompileUnitMap - A map of global variables representing compile units to - /// compile units. - DenseMap<Value *, CompileUnit *> CompileUnitMap; - - /// CompileUnits - All the compile units in this module. - /// - SmallVector<CompileUnit *, 8> CompileUnits; - - /// MainCU - Some platform prefers one compile unit per .o file. In such - /// cases, all dies are inserted in MainCU. - CompileUnit *MainCU; - - /// AbbreviationsSet - Used to uniquely define abbreviations. - /// - FoldingSet<DIEAbbrev> AbbreviationsSet; - - /// Abbreviations - A list of all the unique abbreviations in use. - /// - std::vector<DIEAbbrev *> Abbreviations; - - /// DirectoryIdMap - Directory name to directory id map. - /// - StringMap<unsigned> DirectoryIdMap; - - /// DirectoryNames - A list of directory names. - SmallVector<std::string, 8> DirectoryNames; - - /// SourceFileIdMap - Source file name to source file id map. - /// - StringMap<unsigned> SourceFileIdMap; - - /// SourceFileNames - A list of source file names. - SmallVector<std::string, 8> SourceFileNames; - - /// SourceIdMap - Source id map, i.e. pair of directory id and source file - /// id mapped to a unique id. - DenseMap<std::pair<unsigned, unsigned>, unsigned> SourceIdMap; - - /// SourceIds - Reverse map from source id to directory id + file id pair. - /// - SmallVector<std::pair<unsigned, unsigned>, 8> SourceIds; - - /// Lines - List of of source line correspondence. - std::vector<SrcLineInfo> Lines; - - /// ValuesSet - Used to uniquely define values. - /// - FoldingSet<DIEValue> ValuesSet; - - /// Values - A list of all the unique values in use. - /// - std::vector<DIEValue *> Values; - - /// StringPool - A UniqueVector of strings used by indirect references. - /// - UniqueVector<std::string> StringPool; - - /// SectionMap - Provides a unique id per text section. - /// - UniqueVector<const Section*> SectionMap; - - /// SectionSourceLines - Tracks line numbers per text section. - /// - std::vector<std::vector<SrcLineInfo> > SectionSourceLines; - - /// didInitial - Flag to indicate if initial emission has been done. - /// - bool didInitial; - - /// shouldEmit - Flag to indicate if debug information should be emitted. - /// - bool shouldEmit; - - // FunctionDbgScope - Top level scope for the current function. - // - DbgScope *FunctionDbgScope; - - /// DbgScopeMap - Tracks the scopes in the current function. - DenseMap<GlobalVariable *, DbgScope *> DbgScopeMap; - - /// DbgAbstractScopeMap - Tracks abstract instance scopes in the current - /// function. - DenseMap<GlobalVariable *, DbgScope *> DbgAbstractScopeMap; - - /// DbgConcreteScopeMap - Tracks concrete instance scopes in the current - /// function. - DenseMap<GlobalVariable *, - SmallVector<DbgScope *, 8> > DbgConcreteScopeMap; - - /// InlineInfo - Keep track of inlined functions and their location. This - /// information is used to populate debug_inlined section. - DenseMap<GlobalVariable *, SmallVector<unsigned, 4> > InlineInfo; - - /// InlinedVariableScopes - Scopes information for the inlined subroutine - /// variables. - DenseMap<const MachineInstr *, DbgScope *> InlinedVariableScopes; - - /// AbstractInstanceRootMap - Map of abstract instance roots of inlined - /// functions. These are subroutine entries that contain a DW_AT_inline - /// attribute. - DenseMap<const GlobalVariable *, DbgScope *> AbstractInstanceRootMap; - - /// AbstractInstanceRootList - List of abstract instance roots of inlined - /// functions. These are subroutine entries that contain a DW_AT_inline - /// attribute. - SmallVector<DbgScope *, 32> AbstractInstanceRootList; - - /// LexicalScopeStack - A stack of lexical scopes. The top one is the current - /// scope. - SmallVector<DbgScope *, 16> LexicalScopeStack; - - /// CompileUnitOffsets - A vector of the offsets of the compile units. This is - /// used when calculating the "origin" of a concrete instance of an inlined - /// function. - DenseMap<CompileUnit *, unsigned> CompileUnitOffsets; - - /// DebugTimer - Timer for the Dwarf debug writer. - Timer *DebugTimer; - - struct FunctionDebugFrameInfo { - unsigned Number; - std::vector<MachineMove> Moves; - - FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M): - Number(Num), Moves(M) { } - }; - - std::vector<FunctionDebugFrameInfo> DebugFrames; - -private: - /// getSourceDirectoryAndFileIds - Return the directory and file ids that - /// maps to the source id. Source id starts at 1. - std::pair<unsigned, unsigned> - getSourceDirectoryAndFileIds(unsigned SId) const { - return SourceIds[SId-1]; - } - - /// getNumSourceDirectories - Return the number of source directories in the - /// debug info. - unsigned getNumSourceDirectories() const { - return DirectoryNames.size(); - } - - /// getSourceDirectoryName - Return the name of the directory corresponding - /// to the id. - const std::string &getSourceDirectoryName(unsigned Id) const { - return DirectoryNames[Id - 1]; - } - - /// getSourceFileName - Return the name of the source file corresponding - /// to the id. - const std::string &getSourceFileName(unsigned Id) const { - return SourceFileNames[Id - 1]; - } - - /// getNumSourceIds - Return the number of unique source ids. - unsigned getNumSourceIds() const { - return SourceIds.size(); - } - - /// AssignAbbrevNumber - Define a unique number for the abbreviation. - /// - void AssignAbbrevNumber(DIEAbbrev &Abbrev) { - // Profile the node so that we can make it unique. - FoldingSetNodeID ID; - Abbrev.Profile(ID); - - // Check the set for priors. - DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev); - - // If it's newly added. - if (InSet == &Abbrev) { - // Add to abbreviation list. - Abbreviations.push_back(&Abbrev); - // Assign the vector position + 1 as its number. - Abbrev.setNumber(Abbreviations.size()); - } else { - // Assign existing abbreviation number. - Abbrev.setNumber(InSet->getNumber()); - } - } - - /// NewString - Add a string to the constant pool and returns a label. - /// - DWLabel NewString(const std::string &String) { - unsigned StringID = StringPool.insert(String); - return DWLabel("string", StringID); - } - - /// NewDIEEntry - Creates a new DIEEntry to be a proxy for a debug information - /// entry. - DIEEntry *NewDIEEntry(DIE *Entry = NULL) { - DIEEntry *Value; - - if (Entry) { - FoldingSetNodeID ID; - DIEEntry::Profile(ID, Entry); - void *Where; - Value = static_cast<DIEEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where)); - - if (Value) return Value; - - Value = new DIEEntry(Entry); - ValuesSet.InsertNode(Value, Where); - } else { - Value = new DIEEntry(Entry); - } - - Values.push_back(Value); - return Value; - } - - /// SetDIEEntry - Set a DIEEntry once the debug information entry is defined. - /// - void SetDIEEntry(DIEEntry *Value, DIE *Entry) { - Value->setEntry(Entry); - // Add to values set if not already there. If it is, we merely have a - // duplicate in the values list (no harm.) - ValuesSet.GetOrInsertNode(Value); - } - - /// AddUInt - Add an unsigned integer attribute data and value. - /// - void AddUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer) { - if (!Form) Form = DIEInteger::BestForm(false, Integer); - - FoldingSetNodeID ID; - DIEInteger::Profile(ID, Integer); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = new DIEInteger(Integer); - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } - - Die->AddValue(Attribute, Form, Value); - } - - /// AddSInt - Add an signed integer attribute data and value. - /// - void AddSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer) { - if (!Form) Form = DIEInteger::BestForm(true, Integer); - - FoldingSetNodeID ID; - DIEInteger::Profile(ID, (uint64_t)Integer); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = new DIEInteger(Integer); - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } - - Die->AddValue(Attribute, Form, Value); - } - - /// AddString - Add a string attribute data and value. - /// - void AddString(DIE *Die, unsigned Attribute, unsigned Form, - const std::string &String) { - FoldingSetNodeID ID; - DIEString::Profile(ID, String); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = new DIEString(String); - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } - - Die->AddValue(Attribute, Form, Value); - } - - /// AddLabel - Add a Dwarf label attribute data and value. - /// - void AddLabel(DIE *Die, unsigned Attribute, unsigned Form, - const DWLabel &Label) { - FoldingSetNodeID ID; - DIEDwarfLabel::Profile(ID, Label); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = new DIEDwarfLabel(Label); - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } - - Die->AddValue(Attribute, Form, Value); - } - - /// AddObjectLabel - Add an non-Dwarf label attribute data and value. - /// - void AddObjectLabel(DIE *Die, unsigned Attribute, unsigned Form, - const std::string &Label) { - FoldingSetNodeID ID; - DIEObjectLabel::Profile(ID, Label); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = new DIEObjectLabel(Label); - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } - - Die->AddValue(Attribute, Form, Value); - } - - /// AddSectionOffset - Add a section offset label attribute data and value. - /// - void AddSectionOffset(DIE *Die, unsigned Attribute, unsigned Form, - const DWLabel &Label, const DWLabel &Section, - bool isEH = false, bool useSet = true) { - FoldingSetNodeID ID; - DIESectionOffset::Profile(ID, Label, Section); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = new DIESectionOffset(Label, Section, isEH, useSet); - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } - - Die->AddValue(Attribute, Form, Value); - } - - /// AddDelta - Add a label delta attribute data and value. - /// - void AddDelta(DIE *Die, unsigned Attribute, unsigned Form, - const DWLabel &Hi, const DWLabel &Lo) { - FoldingSetNodeID ID; - DIEDelta::Profile(ID, Hi, Lo); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = new DIEDelta(Hi, Lo); - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } - - Die->AddValue(Attribute, Form, Value); - } - - /// AddDIEEntry - Add a DIE attribute data and value. - /// - void AddDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) { - Die->AddValue(Attribute, Form, NewDIEEntry(Entry)); - } - - /// AddBlock - Add block data. - /// - void AddBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block) { - Block->ComputeSize(TD); - FoldingSetNodeID ID; - Block->Profile(ID); - void *Where; - DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where); - if (!Value) { - Value = Block; - ValuesSet.InsertNode(Value, Where); - Values.push_back(Value); - } else { - // Already exists, reuse the previous one. - delete Block; - Block = cast<DIEBlock>(Value); - } - - Die->AddValue(Attribute, Block->BestForm(), Value); - } - - /// AddSourceLine - Add location information to specified debug information - /// entry. - void AddSourceLine(DIE *Die, const DIVariable *V) { - // If there is no compile unit specified, don't add a line #. - if (V->getCompileUnit().isNull()) - return; - - unsigned Line = V->getLineNumber(); - unsigned FileID = FindCompileUnit(V->getCompileUnit()).getID(); - assert(FileID && "Invalid file id"); - AddUInt(Die, DW_AT_decl_file, 0, FileID); - AddUInt(Die, DW_AT_decl_line, 0, Line); - } - - /// AddSourceLine - Add location information to specified debug information - /// entry. - void AddSourceLine(DIE *Die, const DIGlobal *G) { - // If there is no compile unit specified, don't add a line #. - if (G->getCompileUnit().isNull()) - return; - unsigned Line = G->getLineNumber(); - unsigned FileID = FindCompileUnit(G->getCompileUnit()).getID(); - assert(FileID && "Invalid file id"); - AddUInt(Die, DW_AT_decl_file, 0, FileID); - AddUInt(Die, DW_AT_decl_line, 0, Line); - } - - void AddSourceLine(DIE *Die, const DIType *Ty) { - // If there is no compile unit specified, don't add a line #. - DICompileUnit CU = Ty->getCompileUnit(); - if (CU.isNull()) - return; - - unsigned Line = Ty->getLineNumber(); - unsigned FileID = FindCompileUnit(CU).getID(); - assert(FileID && "Invalid file id"); - AddUInt(Die, DW_AT_decl_file, 0, FileID); - AddUInt(Die, DW_AT_decl_line, 0, Line); - } - - /// AddAddress - Add an address attribute to a die based on the location - /// provided. - void AddAddress(DIE *Die, unsigned Attribute, - const MachineLocation &Location) { - unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false); - DIEBlock *Block = new DIEBlock(); - - if (Location.isReg()) { - if (Reg < 32) { - AddUInt(Block, 0, DW_FORM_data1, DW_OP_reg0 + Reg); - } else { - AddUInt(Block, 0, DW_FORM_data1, DW_OP_regx); - AddUInt(Block, 0, DW_FORM_udata, Reg); - } - } else { - if (Reg < 32) { - AddUInt(Block, 0, DW_FORM_data1, DW_OP_breg0 + Reg); - } else { - AddUInt(Block, 0, DW_FORM_data1, DW_OP_bregx); - AddUInt(Block, 0, DW_FORM_udata, Reg); - } - AddUInt(Block, 0, DW_FORM_sdata, Location.getOffset()); - } - - AddBlock(Die, Attribute, 0, Block); - } - - /// AddType - Add a new type attribute to the specified entity. - void AddType(CompileUnit *DW_Unit, DIE *Entity, DIType Ty) { - if (Ty.isNull()) - return; - - // Check for pre-existence. - DIEEntry *&Slot = DW_Unit->getDIEEntrySlotFor(Ty.getGV()); - // If it exists then use the existing value. - if (Slot) { - Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot); - return; - } - - // Set up proxy. - Slot = NewDIEEntry(); - - // Construct type. - DIE Buffer(DW_TAG_base_type); - if (Ty.isBasicType(Ty.getTag())) - ConstructTypeDIE(DW_Unit, Buffer, DIBasicType(Ty.getGV())); - else if (Ty.isDerivedType(Ty.getTag())) - ConstructTypeDIE(DW_Unit, Buffer, DIDerivedType(Ty.getGV())); - else { - assert(Ty.isCompositeType(Ty.getTag()) && "Unknown kind of DIType"); - ConstructTypeDIE(DW_Unit, Buffer, DICompositeType(Ty.getGV())); - } - - // Add debug information entry to entity and appropriate context. - DIE *Die = NULL; - DIDescriptor Context = Ty.getContext(); - if (!Context.isNull()) - Die = DW_Unit->getDieMapSlotFor(Context.getGV()); - - if (Die) { - DIE *Child = new DIE(Buffer); - Die->AddChild(Child); - Buffer.Detach(); - SetDIEEntry(Slot, Child); - } else { - Die = DW_Unit->AddDie(Buffer); - SetDIEEntry(Slot, Die); - } - - Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot); - } - - /// ConstructTypeDIE - Construct basic type die from DIBasicType. - void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer, - DIBasicType BTy) { - - // Get core information. - std::string Name; - BTy.getName(Name); - Buffer.setTag(DW_TAG_base_type); - AddUInt(&Buffer, DW_AT_encoding, DW_FORM_data1, BTy.getEncoding()); - // Add name if not anonymous or intermediate type. - if (!Name.empty()) - AddString(&Buffer, DW_AT_name, DW_FORM_string, Name); - uint64_t Size = BTy.getSizeInBits() >> 3; - AddUInt(&Buffer, DW_AT_byte_size, 0, Size); - } - - /// ConstructTypeDIE - Construct derived type die from DIDerivedType. - void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer, - DIDerivedType DTy) { - - // Get core information. - std::string Name; - DTy.getName(Name); - uint64_t Size = DTy.getSizeInBits() >> 3; - unsigned Tag = DTy.getTag(); - - // FIXME - Workaround for templates. - if (Tag == DW_TAG_inheritance) Tag = DW_TAG_reference_type; - - Buffer.setTag(Tag); - - // Map to main type, void will not have a type. - DIType FromTy = DTy.getTypeDerivedFrom(); - AddType(DW_Unit, &Buffer, FromTy); - - // Add name if not anonymous or intermediate type. - if (!Name.empty()) - AddString(&Buffer, DW_AT_name, DW_FORM_string, Name); - - // Add size if non-zero (derived types might be zero-sized.) - if (Size) - AddUInt(&Buffer, DW_AT_byte_size, 0, Size); - - // Add source line info if available and TyDesc is not a forward - // declaration. - if (!DTy.isForwardDecl()) - AddSourceLine(&Buffer, &DTy); - } - - /// ConstructTypeDIE - Construct type DIE from DICompositeType. - void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer, - DICompositeType CTy) { - // Get core information. - std::string Name; - CTy.getName(Name); - - uint64_t Size = CTy.getSizeInBits() >> 3; - unsigned Tag = CTy.getTag(); - Buffer.setTag(Tag); - - switch (Tag) { - case DW_TAG_vector_type: - case DW_TAG_array_type: - ConstructArrayTypeDIE(DW_Unit, Buffer, &CTy); - break; - case DW_TAG_enumeration_type: - { - DIArray Elements = CTy.getTypeArray(); - // Add enumerators to enumeration type. - for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) { - DIE *ElemDie = NULL; - DIEnumerator Enum(Elements.getElement(i).getGV()); - ElemDie = ConstructEnumTypeDIE(DW_Unit, &Enum); - Buffer.AddChild(ElemDie); - } - } - break; - case DW_TAG_subroutine_type: - { - // Add return type. - DIArray Elements = CTy.getTypeArray(); - DIDescriptor RTy = Elements.getElement(0); - AddType(DW_Unit, &Buffer, DIType(RTy.getGV())); - - // Add prototype flag. - AddUInt(&Buffer, DW_AT_prototyped, DW_FORM_flag, 1); - - // Add arguments. - for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) { - DIE *Arg = new DIE(DW_TAG_formal_parameter); - DIDescriptor Ty = Elements.getElement(i); - AddType(DW_Unit, Arg, DIType(Ty.getGV())); - Buffer.AddChild(Arg); - } - } - break; - case DW_TAG_structure_type: - case DW_TAG_union_type: - case DW_TAG_class_type: - { - // Add elements to structure type. - DIArray Elements = CTy.getTypeArray(); - - // A forward struct declared type may not have elements available. - if (Elements.isNull()) - break; - - // Add elements to structure type. - for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) { - DIDescriptor Element = Elements.getElement(i); - DIE *ElemDie = NULL; - if (Element.getTag() == dwarf::DW_TAG_subprogram) - ElemDie = CreateSubprogramDIE(DW_Unit, - DISubprogram(Element.getGV())); - else if (Element.getTag() == dwarf::DW_TAG_variable) // ?? - ElemDie = CreateGlobalVariableDIE(DW_Unit, - DIGlobalVariable(Element.getGV())); - else - ElemDie = CreateMemberDIE(DW_Unit, - DIDerivedType(Element.getGV())); - Buffer.AddChild(ElemDie); - } - - // FIXME: We'd like an API to register additional attributes for the - // frontend to use while synthesizing, and then we'd use that api in - // clang instead of this. - if (Name == "__block_literal_generic") - AddUInt(&Buffer, DW_AT_APPLE_block, DW_FORM_flag, 1); - - unsigned RLang = CTy.getRunTimeLang(); - if (RLang) - AddUInt(&Buffer, DW_AT_APPLE_runtime_class, DW_FORM_data1, RLang); - } - break; - default: - break; - } - - // Add name if not anonymous or intermediate type. - if (!Name.empty()) - AddString(&Buffer, DW_AT_name, DW_FORM_string, Name); - - if (Tag == DW_TAG_enumeration_type || Tag == DW_TAG_structure_type - || Tag == DW_TAG_union_type) { - // Add size if non-zero (derived types might be zero-sized.) - if (Size) - AddUInt(&Buffer, DW_AT_byte_size, 0, Size); - else { - // Add zero size if it is not a forward declaration. - if (CTy.isForwardDecl()) - AddUInt(&Buffer, DW_AT_declaration, DW_FORM_flag, 1); - else - AddUInt(&Buffer, DW_AT_byte_size, 0, 0); - } - - // Add source line info if available. - if (!CTy.isForwardDecl()) - AddSourceLine(&Buffer, &CTy); - } - } - - /// ConstructSubrangeDIE - Construct subrange DIE from DISubrange. - void ConstructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy) { - int64_t L = SR.getLo(); - int64_t H = SR.getHi(); - DIE *DW_Subrange = new DIE(DW_TAG_subrange_type); - if (L != H) { - AddDIEEntry(DW_Subrange, DW_AT_type, DW_FORM_ref4, IndexTy); - if (L) - AddSInt(DW_Subrange, DW_AT_lower_bound, 0, L); - AddSInt(DW_Subrange, DW_AT_upper_bound, 0, H); - } - Buffer.AddChild(DW_Subrange); - } - - /// ConstructArrayTypeDIE - Construct array type DIE from DICompositeType. - void ConstructArrayTypeDIE(CompileUnit *DW_Unit, DIE &Buffer, - DICompositeType *CTy) { - Buffer.setTag(DW_TAG_array_type); - if (CTy->getTag() == DW_TAG_vector_type) - AddUInt(&Buffer, DW_AT_GNU_vector, DW_FORM_flag, 1); - - // Emit derived type. - AddType(DW_Unit, &Buffer, CTy->getTypeDerivedFrom()); - DIArray Elements = CTy->getTypeArray(); - - // Construct an anonymous type for index type. - DIE IdxBuffer(DW_TAG_base_type); - AddUInt(&IdxBuffer, DW_AT_byte_size, 0, sizeof(int32_t)); - AddUInt(&IdxBuffer, DW_AT_encoding, DW_FORM_data1, DW_ATE_signed); - DIE *IndexTy = DW_Unit->AddDie(IdxBuffer); - - // Add subranges to array type. - for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) { - DIDescriptor Element = Elements.getElement(i); - if (Element.getTag() == dwarf::DW_TAG_subrange_type) - ConstructSubrangeDIE(Buffer, DISubrange(Element.getGV()), IndexTy); - } - } - - /// ConstructEnumTypeDIE - Construct enum type DIE from DIEnumerator. - DIE *ConstructEnumTypeDIE(CompileUnit *DW_Unit, DIEnumerator *ETy) { - - DIE *Enumerator = new DIE(DW_TAG_enumerator); - std::string Name; - ETy->getName(Name); - AddString(Enumerator, DW_AT_name, DW_FORM_string, Name); - int64_t Value = ETy->getEnumValue(); - AddSInt(Enumerator, DW_AT_const_value, DW_FORM_sdata, Value); - return Enumerator; - } - - /// CreateGlobalVariableDIE - Create new DIE using GV. - DIE *CreateGlobalVariableDIE(CompileUnit *DW_Unit, const DIGlobalVariable &GV) - { - DIE *GVDie = new DIE(DW_TAG_variable); - std::string Name; - GV.getDisplayName(Name); - AddString(GVDie, DW_AT_name, DW_FORM_string, Name); - std::string LinkageName; - GV.getLinkageName(LinkageName); - if (!LinkageName.empty()) - AddString(GVDie, DW_AT_MIPS_linkage_name, DW_FORM_string, LinkageName); - AddType(DW_Unit, GVDie, GV.getType()); - if (!GV.isLocalToUnit()) - AddUInt(GVDie, DW_AT_external, DW_FORM_flag, 1); - AddSourceLine(GVDie, &GV); - return GVDie; - } - - /// CreateMemberDIE - Create new member DIE. - DIE *CreateMemberDIE(CompileUnit *DW_Unit, const DIDerivedType &DT) { - DIE *MemberDie = new DIE(DT.getTag()); - std::string Name; - DT.getName(Name); - if (!Name.empty()) - AddString(MemberDie, DW_AT_name, DW_FORM_string, Name); - - AddType(DW_Unit, MemberDie, DT.getTypeDerivedFrom()); - - AddSourceLine(MemberDie, &DT); - - uint64_t Size = DT.getSizeInBits(); - uint64_t FieldSize = DT.getOriginalTypeSize(); - - if (Size != FieldSize) { - // Handle bitfield. - AddUInt(MemberDie, DW_AT_byte_size, 0, DT.getOriginalTypeSize() >> 3); - AddUInt(MemberDie, DW_AT_bit_size, 0, DT.getSizeInBits()); - - uint64_t Offset = DT.getOffsetInBits(); - uint64_t FieldOffset = Offset; - uint64_t AlignMask = ~(DT.getAlignInBits() - 1); - uint64_t HiMark = (Offset + FieldSize) & AlignMask; - FieldOffset = (HiMark - FieldSize); - Offset -= FieldOffset; - // Maybe we need to work from the other end. - if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size); - AddUInt(MemberDie, DW_AT_bit_offset, 0, Offset); - } - DIEBlock *Block = new DIEBlock(); - AddUInt(Block, 0, DW_FORM_data1, DW_OP_plus_uconst); - AddUInt(Block, 0, DW_FORM_udata, DT.getOffsetInBits() >> 3); - AddBlock(MemberDie, DW_AT_data_member_location, 0, Block); - - if (DT.isProtected()) - AddUInt(MemberDie, DW_AT_accessibility, 0, DW_ACCESS_protected); - e |