#ifndef CODEGEN_ASMPRINTER_DWARFDEBUG_H__
#define CODEGEN_ASMPRINTER_DWARFDEBUG_H__
+#include "AsmPrinterHandler.h"
#include "DIE.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/FoldingSet.h"
namespace llvm {
+class Unit;
class CompileUnit;
class ConstantInt;
class ConstantFP;
class MachineModuleInfo;
class MachineOperand;
class MCAsmInfo;
+class MCObjectFileInfo;
class DIEAbbrev;
class DIE;
class DIEBlock;
DbgVariable *AbsVar; // Corresponding Abstract variable, if any.
const MachineInstr *MInsn; // DBG_VALUE instruction of the variable.
int FrameIndex;
+ DwarfDebug *DD;
public:
// AbsVar may be NULL.
- DbgVariable(DIVariable V, DbgVariable *AV)
+ DbgVariable(DIVariable V, DbgVariable *AV, DwarfDebug *DD)
: Var(V), TheDIE(0), DotDebugLocOffset(~0U), AbsVar(AV), MInsn(0),
- FrameIndex(~0) {}
+ FrameIndex(~0), DD(DD) {}
// Accessors.
DIVariable getVariable() const { return Var; }
int getFrameIndex() const { return FrameIndex; }
void setFrameIndex(int FI) { FrameIndex = FI; }
// Translate tag to proper Dwarf tag.
- unsigned getTag() const {
+ uint16_t getTag() const {
if (Var.getTag() == dwarf::DW_TAG_arg_variable)
return dwarf::DW_TAG_formal_parameter;
return Var.getAddrElement(i);
}
DIType getType() const;
+
+private:
+ /// resolve - Look in the DwarfDebug map for the MDNode that
+ /// corresponds to the reference.
+ template <typename T> T resolve(DIRef<T> Ref) const;
};
/// \brief Collects and handles information specific to a particular
FoldingSet<DIEAbbrev> *AbbreviationsSet;
// A list of all the unique abbreviations in use.
- std::vector<DIEAbbrev *> *Abbreviations;
+ std::vector<DIEAbbrev *> &Abbreviations;
// A pointer to all units in the section.
- SmallVector<CompileUnit *, 1> CUs;
+ SmallVector<Unit *, 1> CUs;
// Collection of strings for this unit and assorted symbols.
// A String->Symbol mapping of strings used by indirect
public:
DwarfUnits(AsmPrinter *AP, FoldingSet<DIEAbbrev> *AS,
- std::vector<DIEAbbrev *> *A, const char *Pref,
+ std::vector<DIEAbbrev *> &A, const char *Pref,
BumpPtrAllocator &DA)
: Asm(AP), AbbreviationsSet(AS), Abbreviations(A), StringPool(DA),
NextStringPoolNumber(0), StringPref(Pref), AddressPool(),
NextAddrPoolNumber(0) {}
+ ~DwarfUnits();
+
+ const SmallVectorImpl<Unit *> &getUnits() { return CUs; }
+
/// \brief Compute the size and offset of a DIE given an incoming Offset.
unsigned computeSizeAndOffset(DIE *Die, unsigned Offset);
void assignAbbrevNumber(DIEAbbrev &Abbrev);
/// \brief Add a unit to the list of CUs.
- void addUnit(CompileUnit *CU) { CUs.push_back(CU); }
+ void addUnit(Unit *CU) { CUs.push_back(CU); }
/// \brief Emit all of the units to the section listed with the given
/// abbreviation section.
/// \brief Returns the address pool.
AddrPool *getAddrPool() { return &AddressPool; }
+};
- /// \brief for a given compile unit DIE, returns offset from beginning of
- /// debug info.
- unsigned getCUOffset(DIE *Die);
+/// \brief Helper used to pair up a symbol and its DWARF compile unit.
+struct SymbolCU {
+ SymbolCU(CompileUnit *CU, const MCSymbol *Sym) : Sym(Sym), CU(CU) {}
+ const MCSymbol *Sym;
+ CompileUnit *CU;
};
/// \brief Collects and handles dwarf debug information.
-class DwarfDebug {
+class DwarfDebug : public AsmPrinterHandler {
// Target of Dwarf emission.
AsmPrinter *Asm;
// All DIEValues are allocated through this allocator.
BumpPtrAllocator DIEValueAllocator;
- //===--------------------------------------------------------------------===//
- // Attribute used to construct specific Dwarf sections.
- //
-
+ // Handle to the a compile unit used for the inline extension handling.
CompileUnit *FirstCU;
// Maps MDNode with its corresponding CompileUnit.
// Maps subprogram MDNode with its corresponding CompileUnit.
DenseMap <const MDNode *, CompileUnit *> SPMap;
+ // Maps a CU DIE with its corresponding CompileUnit.
+ DenseMap <const DIE *, CompileUnit *> CUDieMap;
+
+ /// Maps MDNodes for type sysstem with the corresponding DIEs. These DIEs can
+ /// be shared across CUs, that is why we keep the map here instead
+ /// of in CompileUnit.
+ DenseMap<const MDNode *, DIE *> MDTypeNodeToDieMap;
+
// Used to uniquely define abbreviations.
FoldingSet<DIEAbbrev> AbbreviationsSet;
// separated by a zero byte, mapped to a unique id.
StringMap<unsigned, BumpPtrAllocator&> SourceIdMap;
+ // List of all labels used in aranges generation.
+ std::vector<SymbolCU> ArangeLabels;
+
+ // Size of each symbol emitted (for those symbols that have a specific size).
+ DenseMap <const MCSymbol *, uint64_t> SymSize;
+
// Provides a unique id per text section.
- SetVector<const MCSection*> SectionMap;
+ typedef DenseMap<const MCSection *, SmallVector<SymbolCU, 8> > SectionMapType;
+ SectionMapType SectionMap;
- // List of Arguments (DbgValues) for current function.
+ // List of arguments for current function.
SmallVector<DbgVariable *, 8> CurrentFnArguments;
LexicalScopes LScopes;
// as DW_AT_inline.
SmallPtrSet<DIE *, 4> InlinedSubprogramDIEs;
- // Keep track of inlined functions and their location. This
- // information is used to populate the debug_inlined section.
- typedef std::pair<const MCSymbol *, DIE *> InlineInfoLabels;
- typedef DenseMap<const MDNode *,
- SmallVector<InlineInfoLabels, 4> > InlineInfoMap;
- InlineInfoMap InlineInfo;
- SmallVector<const MDNode *, 4> InlinedSPNodes;
-
// This is a collection of subprogram MDNodes that are processed to
// create DIEs.
SmallPtrSet<const MDNode *, 16> ProcessedSPNodes;
DbgValueHistoryMap;
DbgValueHistoryMap DbgValues;
- SmallVector<const MCSymbol *, 8> DebugRangeSymbols;
-
// Previous instruction's location information. This is used to determine
// label location to indicate scope boundries in dwarf debug info.
DebugLoc PrevInstLoc;
// body.
DebugLoc PrologEndLoc;
+ // If nonnull, stores the current machine function we're processing.
+ const MachineFunction *CurFn;
+
+ // If nonnull, stores the current machine instruction we're processing.
+ const MachineInstr *CurMI;
+
// Section Symbols: these are assembler temporary labels that are emitted at
// the beginning of each supported dwarf section. These are used to form
// section offsets and are created by EmitSectionLabels.
MCSymbol *DwarfDebugLocSectionSym, *DwarfLineSectionSym, *DwarfAddrSectionSym;
MCSymbol *FunctionBeginSym, *FunctionEndSym;
MCSymbol *DwarfAbbrevDWOSectionSym, *DwarfStrDWOSectionSym;
+ MCSymbol *DwarfGnuPubNamesSectionSym, *DwarfGnuPubTypesSectionSym;
// As an optimization, there is no need to emit an entry in the directory
// table for the same directory as DW_AT_comp_dir.
// Counter for assigning globally unique IDs for CUs.
unsigned GlobalCUIndexCount;
+ // Counter for assigning globally unique IDs for ranges.
+ unsigned GlobalRangeCount;
+
// Holder for the file specific debug information.
DwarfUnits InfoHolder;
// Holders for the various debug information flags that we might need to
// have exposed. See accessor functions below for description.
- // Whether or not we're emitting info for older versions of gdb on darwin.
- bool IsDarwinGDBCompat;
-
// Holder for imported entities.
typedef SmallVector<std::pair<const MDNode *, const MDNode *>, 32>
ImportedEntityMap;
ImportedEntityMap ScopesWithImportedEntities;
+ // Map from type MDNodes to a pair used as a union. If the pointer is
+ // non-null, proxy DIEs in CUs meant to reference this type should be stored
+ // in the vector. The hash will be added to these DIEs once it is computed. If
+ // the pointer is null, the hash is immediately available in the uint64_t and
+ // should be directly used for proxy DIEs.
+ DenseMap<const MDNode *, std::pair<uint64_t, SmallVectorImpl<DIE *> *> >
+ TypeUnits;
+
+ // Whether to emit the pubnames/pubtypes sections.
+ bool HasDwarfPubSections;
+
+ // Version of dwarf we're emitting.
+ unsigned DwarfVersion;
+
+ // Maps from a type identifier to the actual MDNode.
+ DITypeIdentifierMap TypeIdentifierMap;
+
// DWARF5 Experimental Options
bool HasDwarfAccelTables;
bool HasSplitDwarf;
- unsigned DwarfVersion;
-
// Separated Dwarf Variables
// In general these will all be for bits that are left in the
// original object file, rather than things that are meant
// to be in the .dwo sections.
- // The CUs left in the original object file for separated debug info.
- SmallVector<CompileUnit *, 1> SkeletonCUs;
-
// Used to uniquely define abbreviations for the skeleton emission.
FoldingSet<DIEAbbrev> SkeletonAbbrevSet;
// Holder for the skeleton information.
DwarfUnits SkeletonHolder;
-private:
-
void addScopeVariable(LexicalScope *LS, DbgVariable *Var);
+ const SmallVectorImpl<Unit *> &getUnits() { return InfoHolder.getUnits(); }
+
/// \brief Find abstract variable associated with Var.
DbgVariable *findAbstractVariable(DIVariable &Var, DebugLoc Loc);
/// DW_AT_low_pc and DW_AT_high_pc attributes. If there are global
/// variables in this scope then create and insert DIEs for these
/// variables.
- DIE *updateSubprogramScopeDIE(CompileUnit *SPCU, const MDNode *SPNode);
+ DIE *updateSubprogramScopeDIE(CompileUnit *SPCU, DISubprogram SP);
+
+ /// \brief A helper function to check whether the DIE for a given Scope is
+ /// going to be null.
+ bool isLexicalScopeDIENull(LexicalScope *Scope);
+
+ /// \brief A helper function to construct a RangeSpanList for a given
+ /// lexical scope.
+ void addScopeRangeList(CompileUnit *TheCU, DIE *ScopeDIE,
+ const SmallVectorImpl<InsnRange> &Range);
/// \brief Construct new DW_TAG_lexical_block for this scope and
/// attach DW_AT_low_pc/DW_AT_high_pc labels.
/// \brief Construct a DIE for this scope.
DIE *constructScopeDIE(CompileUnit *TheCU, LexicalScope *Scope);
+ /// A helper function to create children of a Scope DIE.
+ DIE *createScopeChildrenDIE(CompileUnit *TheCU, LexicalScope *Scope,
+ SmallVectorImpl<DIE*> &Children);
/// \brief Emit initial Dwarf sections with a label at the start of each one.
void emitSectionLabels();
void emitAccelTypes();
/// \brief Emit visible names into a debug pubnames section.
- void emitDebugPubnames();
+ /// \param GnuStyle determines whether or not we want to emit
+ /// additional information into the table ala newer gcc for gdb
+ /// index.
+ void emitDebugPubNames(bool GnuStyle = false);
/// \brief Emit visible types into a debug pubtypes section.
- void emitDebugPubTypes();
+ /// \param GnuStyle determines whether or not we want to emit
+ /// additional information into the table ala newer gcc for gdb
+ /// index.
+ void emitDebugPubTypes(bool GnuStyle = false);
/// \brief Emit visible names into a debug str section.
void emitDebugStr();
/// \brief Construct the split debug info compile unit for the debug info
/// section.
- CompileUnit *constructSkeletonCU(const MDNode *);
+ CompileUnit *constructSkeletonCU(const CompileUnit *CU);
/// \brief Emit the local split abbreviations.
void emitSkeletonAbbrevs(const MCSection *);
/// \brief Create new CompileUnit for the given metadata node with tag
/// DW_TAG_compile_unit.
- CompileUnit *constructCompileUnit(const MDNode *N);
+ CompileUnit *constructCompileUnit(DICompileUnit DIUnit);
/// \brief Construct subprogram DIE.
void constructSubprogramDIE(CompileUnit *TheCU, const MDNode *N);
/// \brief If Var is an current function argument that add it in
/// CurrentFnArguments list.
- bool addCurrentFnArgument(const MachineFunction *MF,
- DbgVariable *Var, LexicalScope *Scope);
+ bool addCurrentFnArgument(DbgVariable *Var, LexicalScope *Scope);
/// \brief Populate LexicalScope entries with variables' info.
- void collectVariableInfo(const MachineFunction *,
- SmallPtrSet<const MDNode *, 16> &ProcessedVars);
+ void collectVariableInfo(SmallPtrSet<const MDNode *, 16> &ProcessedVars);
/// \brief Collect variable information from the side table maintained
/// by MMI.
- void collectVariableInfoFromMMITable(const MachineFunction * MF,
- SmallPtrSet<const MDNode *, 16> &P);
+ void collectVariableInfoFromMMITable(SmallPtrSet<const MDNode *, 16> &P);
/// \brief Ensure that a label will be emitted before MI.
void requestLabelBeforeInsn(const MachineInstr *MI) {
// Main entry points.
//
DwarfDebug(AsmPrinter *A, Module *M);
- ~DwarfDebug();
+
+ void insertDIE(const MDNode *TypeMD, DIE *Die) {
+ MDTypeNodeToDieMap.insert(std::make_pair(TypeMD, Die));
+ }
+ DIE *getDIE(const MDNode *TypeMD) {
+ return MDTypeNodeToDieMap.lookup(TypeMD);
+ }
/// \brief Emit all Dwarf sections that should come prior to the
/// content.
void beginInstruction(const MachineInstr *MI);
/// \brief Process end of an instruction.
- void endInstruction(const MachineInstr *MI);
+ void endInstruction();
+
+ /// \brief Add a DIE to the set of types that we're going to pull into
+ /// type units.
+ void addTypeUnitType(uint16_t Language, DIE *Die, DICompositeType CTy);
+
+ /// \brief Add a label so that arange data can be generated for it.
+ void addArangeLabel(SymbolCU SCU) { ArangeLabels.push_back(SCU); }
+
+ /// \brief For symbols that have a size designated (e.g. common symbols),
+ /// this tracks that size.
+ void setSymbolSize(const MCSymbol *Sym, uint64_t Size) { SymSize[Sym] = Size;}
/// \brief Look up the source id with the given directory and source file
/// names. If none currently exists, create a new id and insert it in the
unsigned CUID);
/// \brief Recursively Emits a debug information entry.
- void emitDIE(DIE *Die, std::vector<DIEAbbrev *> *Abbrevs);
-
- /// \brief Returns whether or not to limit some of our debug
- /// output to the limitations of darwin gdb.
- bool useDarwinGDBCompat() { return IsDarwinGDBCompat; }
+ void emitDIE(DIE *Die, ArrayRef<DIEAbbrev *> Abbrevs);
// Experimental DWARF5 features.
/// Returns the Dwarf Version.
unsigned getDwarfVersion() const { return DwarfVersion; }
+
+ /// Find the MDNode for the given reference.
+ template <typename T> T resolve(DIRef<T> Ref) const {
+ return Ref.resolve(TypeIdentifierMap);
+ }
+
+ /// isSubprogramContext - Return true if Context is either a subprogram
+ /// or another context nested inside a subprogram.
+ bool isSubprogramContext(const MDNode *Context);
+
};
} // End of namespace llvm
projects / oota-llvm.git / blobdiff