#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;
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 it's DWARF compile unit.
+/// \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;
// Maps subprogram MDNode with its corresponding CompileUnit.
DenseMap <const MDNode *, CompileUnit *> SPMap;
- /// Maps type MDNode with its corresponding DIE. These DIEs can be
- /// shared across CUs, that is why we keep the map here instead
+ // 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;
- /// Maps subprogram MDNode with its corresponding DIE.
- DenseMap<const MDNode *, DIE *> MDSPNodeToDieMap;
- /// Maps static member MDNode with its corresponding DIE.
- DenseMap<const MDNode *, DIE *> MDStaticMemberNodeToDieMap;
-
- /// Specifies a worklist item. Sometimes, when we try to add an attribute to
- /// a DIE, the DIE is not yet added to its owner yet, so we don't know whether
- /// we should use ref_addr or ref4. We create a worklist that will be
- /// processed during finalization to add attributes with the correct form
- /// (ref_addr or ref4).
- struct DIEEntryWorkItem {
- DIE *Die;
- uint16_t Attribute;
- DIEEntry *Entry;
- DIEEntryWorkItem(DIE *D, uint16_t A, DIEEntry *E) :
- Die(D), Attribute(A), Entry(E) {
- }
- };
- SmallVector<DIEEntryWorkItem, 64> DIEEntryWorklist;
// 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 the output.
- std::vector<SymbolCU> Labels;
+ // 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;
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.
// 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;
- // Holder for types that are going to be extracted out into a type unit.
- std::vector<DIE *> TypeUnits;
+ // 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;
// 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;
- // Maps from a type identifier to the actual MDNode.
- DITypeIdentifierMap TypeIdentifierMap;
-
-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.
DIE *constructLexicalScopeDIE(CompileUnit *TheCU, LexicalScope *Scope);
- /// A helper function to check whether the DIE for a given Scope is going
- /// to be null.
- bool isLexicalScopeDIENull(LexicalScope *Scope);
/// \brief This scope represents inlined body of a function. Construct
/// DIE to represent this concrete inlined copy of the function.
/// \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 insertTypeDIE(const MDNode *TypeMD, DIE *Die) {
+ void insertDIE(const MDNode *TypeMD, DIE *Die) {
MDTypeNodeToDieMap.insert(std::make_pair(TypeMD, Die));
}
- DIE *getTypeDIE(const MDNode *TypeMD) {
+ DIE *getDIE(const MDNode *TypeMD) {
return MDTypeNodeToDieMap.lookup(TypeMD);
}
- void insertSPDIE(const MDNode *SPMD, DIE *Die) {
- MDSPNodeToDieMap.insert(std::make_pair(SPMD, Die));
- }
- DIE *getSPDIE(const MDNode *SPMD) {
- return MDSPNodeToDieMap.lookup(SPMD);
- }
- void insertStaticMemberDIE(const MDNode *StaticMD, DIE *Die) {
- MDStaticMemberNodeToDieMap.insert(std::make_pair(StaticMD, Die));
- }
- DIE *getStaticMemberDIE(const MDNode *StaticMD) {
- return MDStaticMemberNodeToDieMap.lookup(StaticMD);
- }
- void insertDIEEntryWorklist(DIE *Die, uint16_t Attribute, DIEEntry *Entry) {
- DIEEntryWorklist.push_back(DIEEntryWorkItem(Die, Attribute, Entry));
- }
/// \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(DIE *Die) { TypeUnits.push_back(Die); }
+ void addTypeUnitType(uint16_t Language, DIE *Die, DICompositeType CTy);
/// \brief Add a label so that arange data can be generated for it.
- void addLabel(SymbolCU SCU) { Labels.push_back(SCU); }
+ void addArangeLabel(SymbolCU SCU) { ArangeLabels.push_back(SCU); }
/// \brief For symbols that have a size designated (e.g. common symbols),
/// this tracks that size.
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 scope reference.
- template <typename T>
- T resolve(DIRef<T> Ref) const {
+ /// Find the MDNode for the given reference.
+ template <typename T> T resolve(DIRef<T> Ref) const {
return Ref.resolve(TypeIdentifierMap);
}
- /// When we don't know whether the correct form is ref4 or ref_addr, we create
- /// a worklist item and insert it to DIEEntryWorklist.
- void addDIEEntry(DIE *Die, uint16_t Attribute, uint16_t Form,
- DIEEntry *Entry);
-
/// isSubprogramContext - Return true if Context is either a subprogram
/// or another context nested inside a subprogram.
bool isSubprogramContext(const MDNode *Context);
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