diff options
Diffstat (limited to 'contrib/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h')
| -rw-r--r-- | contrib/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h | 215 |
1 files changed, 90 insertions, 125 deletions
diff --git a/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h b/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h index f2aa808..a1a9426 100644 --- a/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h +++ b/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h @@ -11,29 +11,28 @@ // //===----------------------------------------------------------------------===// -#ifndef CODEGEN_ASMPRINTER_DWARFDEBUG_H__ -#define CODEGEN_ASMPRINTER_DWARFDEBUG_H__ +#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFDEBUG_H +#define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFDEBUG_H -#include "DwarfFile.h" #include "AsmPrinterHandler.h" -#include "DIE.h" #include "DbgValueHistoryCalculator.h" #include "DebugLocEntry.h" #include "DebugLocList.h" #include "DwarfAccelTable.h" +#include "DwarfFile.h" #include "llvm/ADT/DenseMap.h" +#include "llvm/ADT/FoldingSet.h" #include "llvm/ADT/MapVector.h" #include "llvm/ADT/SmallPtrSet.h" #include "llvm/ADT/StringMap.h" -#include "llvm/ADT/FoldingSet.h" +#include "llvm/CodeGen/DIE.h" #include "llvm/CodeGen/LexicalScopes.h" #include "llvm/CodeGen/MachineInstr.h" #include "llvm/IR/DebugInfo.h" #include "llvm/IR/DebugLoc.h" -#include "llvm/MC/MachineLocation.h" #include "llvm/MC/MCDwarf.h" +#include "llvm/MC/MachineLocation.h" #include "llvm/Support/Allocator.h" - #include <memory> namespace llvm { @@ -70,6 +69,7 @@ public: /// \brief This class is used to track local variable information. class DbgVariable { DIVariable Var; // Variable Descriptor. + DIExpression Expr; // Complex address location expression. DIE *TheDIE; // Variable DIE. unsigned DotDebugLocOffset; // Offset in DotDebugLocEntries. const MachineInstr *MInsn; // DBG_VALUE instruction of the variable. @@ -78,18 +78,22 @@ class DbgVariable { public: /// Construct a DbgVariable from a DIVariable. - DbgVariable(DIVariable V, DwarfDebug *DD) - : Var(V), TheDIE(nullptr), DotDebugLocOffset(~0U), MInsn(nullptr), - FrameIndex(~0), DD(DD) {} + DbgVariable(DIVariable V, DIExpression E, DwarfDebug *DD) + : Var(V), Expr(E), TheDIE(nullptr), DotDebugLocOffset(~0U), + MInsn(nullptr), FrameIndex(~0), DD(DD) { + assert(Var.Verify() && Expr.Verify()); + } /// Construct a DbgVariable from a DEBUG_VALUE. /// AbstractVar may be NULL. DbgVariable(const MachineInstr *DbgValue, DwarfDebug *DD) - : Var(DbgValue->getDebugVariable()), TheDIE(nullptr), - DotDebugLocOffset(~0U), MInsn(DbgValue), FrameIndex(~0), DD(DD) {} + : Var(DbgValue->getDebugVariable()), Expr(DbgValue->getDebugExpression()), + TheDIE(nullptr), DotDebugLocOffset(~0U), MInsn(DbgValue), + FrameIndex(~0), DD(DD) {} // Accessors. DIVariable getVariable() const { return Var; } + DIExpression getExpression() const { return Expr; } void setDIE(DIE &D) { TheDIE = &D; } DIE *getDIE() const { return TheDIE; } void setDotDebugLocOffset(unsigned O) { DotDebugLocOffset = O; } @@ -124,14 +128,14 @@ public: bool variableHasComplexAddress() const { assert(Var.isVariable() && "Invalid complex DbgVariable!"); - return Var.hasComplexAddress(); + return Expr.getNumElements() > 0; } bool isBlockByrefVariable() const; unsigned getNumAddrElements() const { assert(Var.isVariable() && "Invalid complex DbgVariable!"); - return Var.getNumAddrElements(); + return Expr.getNumElements(); } - uint64_t getAddrElement(unsigned i) const { return Var.getAddrElement(i); } + uint64_t getAddrElement(unsigned i) const { return Expr.getElement(i); } DIType getType() const; private: @@ -159,26 +163,15 @@ class DwarfDebug : public AsmPrinterHandler { // All DIEValues are allocated through this allocator. BumpPtrAllocator DIEValueAllocator; - // Handle to the compile unit used for the inline extension handling, - // this is just so that the DIEValue allocator has a place to store - // the particular elements. - // FIXME: Store these off of DwarfDebug instead? - DwarfCompileUnit *FirstCU; - // Maps MDNode with its corresponding DwarfCompileUnit. MapVector<const MDNode *, DwarfCompileUnit *> CUMap; // Maps subprogram MDNode with its corresponding DwarfCompileUnit. - DenseMap<const MDNode *, DwarfCompileUnit *> SPMap; + MapVector<const MDNode *, DwarfCompileUnit *> SPMap; // Maps a CU DIE with its corresponding DwarfCompileUnit. DenseMap<const DIE *, DwarfCompileUnit *> CUDieMap; - /// Maps MDNodes for type system with the corresponding DIEs. These DIEs can - /// be shared across CUs, that is why we keep the map here instead - /// of in DwarfCompileUnit. - DenseMap<const MDNode *, DIE *> MDTypeNodeToDieMap; - // List of all labels used in aranges generation. std::vector<SymbolCU> ArangeLabels; @@ -189,19 +182,8 @@ class DwarfDebug : public AsmPrinterHandler { typedef DenseMap<const MCSection *, SmallVector<SymbolCU, 8> > SectionMapType; SectionMapType SectionMap; - // List of arguments for current function. - SmallVector<DbgVariable *, 8> CurrentFnArguments; - LexicalScopes LScopes; - // Collection of abstract subprogram DIEs. - DenseMap<const MDNode *, DIE *> AbstractSPDies; - - // Collection of dbg variables of a scope. - typedef DenseMap<LexicalScope *, SmallVector<DbgVariable *, 8> > - ScopeVariablesMap; - ScopeVariablesMap ScopeVariables; - // Collection of abstract variables. DenseMap<const MDNode *, std::unique_ptr<DbgVariable>> AbstractVariables; SmallVector<std::unique_ptr<DbgVariable>, 64> ConcreteVariables; @@ -210,10 +192,6 @@ class DwarfDebug : public AsmPrinterHandler { // can refer to them in spite of insertions into this list. SmallVector<DebugLocList, 4> DotDebugLocEntries; - // Collection of subprogram DIEs that are marked (at the end of the module) - // as DW_AT_inline. - SmallPtrSet<DIE *, 4> InlinedSubprogramDIEs; - // This is a collection of subprogram MDNodes that are processed to // create DIEs. SmallPtrSet<const MDNode *, 16> ProcessedSPNodes; @@ -243,10 +221,6 @@ class DwarfDebug : public AsmPrinterHandler { // If nonnull, stores the current machine instruction we're processing. const MachineInstr *CurMI; - // If nonnull, stores the section that the previous function was allocated to - // emitting. - const MCSection *PrevSection; - // If nonnull, stores the CU in which the previous subprogram was contained. const DwarfCompileUnit *PrevCU; @@ -258,6 +232,7 @@ class DwarfDebug : public AsmPrinterHandler { MCSymbol *DwarfDebugLocSectionSym, *DwarfLineSectionSym, *DwarfAddrSectionSym; MCSymbol *FunctionBeginSym, *FunctionEndSym; MCSymbol *DwarfInfoDWOSectionSym, *DwarfAbbrevDWOSectionSym; + MCSymbol *DwarfTypesDWOSectionSym; MCSymbol *DwarfStrDWOSectionSym; MCSymbol *DwarfGnuPubNamesSectionSym, *DwarfGnuPubTypesSectionSym; @@ -322,6 +297,7 @@ class DwarfDebug : public AsmPrinterHandler { // True iff there are multiple CUs in this module. bool SingleCU; + bool IsDarwin; AddressPool AddrPool; @@ -330,9 +306,9 @@ class DwarfDebug : public AsmPrinterHandler { DwarfAccelTable AccelNamespace; DwarfAccelTable AccelTypes; - MCDwarfDwoLineTable *getDwoLineTable(const DwarfCompileUnit &); + DenseMap<const Function *, DISubprogram> FunctionDIs; - void addScopeVariable(LexicalScope *LS, DbgVariable *Var); + MCDwarfDwoLineTable *getDwoLineTable(const DwarfCompileUnit &); const SmallVectorImpl<std::unique_ptr<DwarfUnit>> &getUnits() { return InfoHolder.getUnits(); @@ -348,45 +324,8 @@ class DwarfDebug : public AsmPrinterHandler { void ensureAbstractVariableIsCreatedIfScoped(const DIVariable &Var, const MDNode *Scope); - /// \brief Find DIE for the given subprogram and attach appropriate - /// 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(DwarfCompileUnit &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(DwarfCompileUnit &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. - std::unique_ptr<DIE> constructLexicalScopeDIE(DwarfCompileUnit &TheCU, - LexicalScope *Scope); - - /// \brief This scope represents inlined body of a function. Construct - /// DIE to represent this concrete inlined copy of the function. - std::unique_ptr<DIE> constructInlinedScopeDIE(DwarfCompileUnit &TheCU, - LexicalScope *Scope); - - /// \brief Construct a DIE for this scope. - std::unique_ptr<DIE> constructScopeDIE(DwarfCompileUnit &TheCU, - LexicalScope *Scope); - void createAndAddScopeChildren(DwarfCompileUnit &TheCU, LexicalScope *Scope, - DIE &ScopeDIE); /// \brief Construct a DIE for this abstract scope. - void constructAbstractSubprogramScopeDIE(DwarfCompileUnit &TheCU, - LexicalScope *Scope); - /// \brief Construct a DIE for this subprogram scope. - DIE &constructSubprogramScopeDIE(DwarfCompileUnit &TheCU, - LexicalScope *Scope); - /// A helper function to create children of a Scope DIE. - DIE *createScopeChildrenDIE(DwarfCompileUnit &TheCU, LexicalScope *Scope, - SmallVectorImpl<std::unique_ptr<DIE>> &Children); + void constructAbstractSubprogramScopeDIE(LexicalScope *Scope); /// \brief Emit initial Dwarf sections with a label at the start of each one. void emitSectionLabels(); @@ -422,6 +361,10 @@ class DwarfDebug : public AsmPrinterHandler { /// the line matrix. void emitEndOfLineMatrix(unsigned SectionEnd); + /// \brief Emit a specified accelerator table. + void emitAccel(DwarfAccelTable &Accel, const MCSection *Section, + StringRef TableName, StringRef SymName); + /// \brief Emit visible names into a hashed accelerator table section. void emitAccelNames(); @@ -447,10 +390,9 @@ class DwarfDebug : public AsmPrinterHandler { /// index. void emitDebugPubTypes(bool GnuStyle = false); - void - emitDebugPubSection(bool GnuStyle, const MCSection *PSec, StringRef Name, - const StringMap<const DIE *> &(DwarfUnit::*Accessor)() - const); + void emitDebugPubSection( + bool GnuStyle, const MCSection *PSec, StringRef Name, + const StringMap<const DIE *> &(DwarfCompileUnit::*Accessor)() const); /// \brief Emit visible names into a debug str section. void emitDebugStr(); @@ -505,15 +447,8 @@ class DwarfDebug : public AsmPrinterHandler { DwarfCompileUnit &constructDwarfCompileUnit(DICompileUnit DIUnit); /// \brief Construct imported_module or imported_declaration DIE. - void constructImportedEntityDIE(DwarfCompileUnit &TheCU, const MDNode *N); - - /// \brief Construct import_module DIE. - void constructImportedEntityDIE(DwarfCompileUnit &TheCU, const MDNode *N, - DIE &Context); - - /// \brief Construct import_module DIE. - void constructImportedEntityDIE(DwarfCompileUnit &TheCU, - const DIImportedEntity &Module, DIE &Context); + void constructAndAddImportedEntityDIE(DwarfCompileUnit &TheCU, + const MDNode *N); /// \brief Register a source line with debug info. Returns the unique /// label that was emitted and which provides correspondence to the @@ -525,38 +460,29 @@ class DwarfDebug : public AsmPrinterHandler { /// ending of a scope. void identifyScopeMarkers(); - /// \brief If Var is an current function argument that add it in - /// CurrentFnArguments list. - bool addCurrentFnArgument(DbgVariable *Var, LexicalScope *Scope); - /// \brief Populate LexicalScope entries with variables' info. - void collectVariableInfo(SmallPtrSet<const MDNode *, 16> &ProcessedVars); + void collectVariableInfo(DwarfCompileUnit &TheCU, DISubprogram SP, + SmallPtrSetImpl<const MDNode *> &ProcessedVars); + + /// \brief Build the location list for all DBG_VALUEs in the + /// function that describe the same variable. + void buildLocationList(SmallVectorImpl<DebugLocEntry> &DebugLoc, + const DbgValueHistoryMap::InstrRanges &Ranges); /// \brief Collect variable information from the side table maintained /// by MMI. - void collectVariableInfoFromMMITable(SmallPtrSet<const MDNode *, 16> &P); + void collectVariableInfoFromMMITable(SmallPtrSetImpl<const MDNode *> &P); /// \brief Ensure that a label will be emitted before MI. void requestLabelBeforeInsn(const MachineInstr *MI) { LabelsBeforeInsn.insert(std::make_pair(MI, nullptr)); } - /// \brief Return Label preceding the instruction. - MCSymbol *getLabelBeforeInsn(const MachineInstr *MI); - /// \brief Ensure that a label will be emitted after MI. void requestLabelAfterInsn(const MachineInstr *MI) { LabelsAfterInsn.insert(std::make_pair(MI, nullptr)); } - /// \brief Return Label immediately following the instruction. - MCSymbol *getLabelAfterInsn(const MachineInstr *MI); - - void attachRangesOrLowHighPC(DwarfCompileUnit &Unit, DIE &D, - const SmallVectorImpl<InsnRange> &Ranges); - void attachLowHighPC(DwarfCompileUnit &Unit, DIE &D, MCSymbol *Begin, - MCSymbol *End); - public: //===--------------------------------------------------------------------===// // Main entry points. @@ -565,13 +491,6 @@ public: ~DwarfDebug() override; - 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 beginModule(); @@ -624,11 +543,15 @@ public: /// Returns the section symbol for the .debug_loc section. MCSymbol *getDebugLocSym() const { return DwarfDebugLocSectionSym; } - /// Returns the previous section that was emitted into. - const MCSection *getPrevSection() const { return PrevSection; } + /// Returns the section symbol for the .debug_str section. + MCSymbol *getDebugStrSym() const { return DwarfStrSectionSym; } + + /// Returns the section symbol for the .debug_ranges section. + MCSymbol *getRangeSectionSym() const { return DwarfDebugRangeSectionSym; } /// Returns the previous CU that was being updated const DwarfCompileUnit *getPrevCU() const { return PrevCU; } + void setPrevCU(const DwarfCompileUnit *PrevCU) { this->PrevCU = PrevCU; } /// Returns the entries for the .debug_loc section. const SmallVectorImpl<DebugLocList> & @@ -639,6 +562,14 @@ public: /// \brief Emit an entry for the debug loc section. This can be used to /// handle an entry that's going to be emitted into the debug loc section. void emitDebugLocEntry(ByteStreamer &Streamer, const DebugLocEntry &Entry); + /// \brief emit a single value for the debug loc section. + void emitDebugLocValue(ByteStreamer &Streamer, + const DebugLocEntry::Value &Value, + unsigned PieceOffsetInBits = 0); + /// Emits an optimal (=sorted) sequence of DW_OP_pieces. + void emitLocPieces(ByteStreamer &Streamer, + const DITypeIdentifierMap &Map, + ArrayRef<DebugLocEntry::Value> Values); /// Emit the location for a debug loc entry, including the size header. void emitDebugLocEntryLocation(const DebugLocEntry &Entry); @@ -672,6 +603,40 @@ public: void addAccelNamespace(StringRef Name, const DIE &Die); void addAccelType(StringRef Name, const DIE &Die, char Flags); + + const MachineFunction *getCurrentFunction() const { return CurFn; } + const MCSymbol *getFunctionBeginSym() const { return FunctionBeginSym; } + const MCSymbol *getFunctionEndSym() const { return FunctionEndSym; } + + iterator_range<ImportedEntityMap::const_iterator> + findImportedEntitiesForScope(const MDNode *Scope) const { + return make_range(std::equal_range( + ScopesWithImportedEntities.begin(), ScopesWithImportedEntities.end(), + std::pair<const MDNode *, const MDNode *>(Scope, nullptr), + less_first())); + } + + /// \brief A helper function to check whether the DIE for a given Scope is + /// going to be null. + bool isLexicalScopeDIENull(LexicalScope *Scope); + + /// \brief Return Label preceding the instruction. + MCSymbol *getLabelBeforeInsn(const MachineInstr *MI); + + /// \brief Return Label immediately following the instruction. + MCSymbol *getLabelAfterInsn(const MachineInstr *MI); + + // FIXME: Consider rolling ranges up into DwarfDebug since we use a single + // range_base anyway, so there's no need to keep them as separate per-CU range + // lists. (though one day we might end up with a range.dwo section, in which + // case it'd go to DwarfFile) + unsigned getNextRangeNumber() { return GlobalRangeCount++; } + + // FIXME: Sink these functions down into DwarfFile/Dwarf*Unit. + + SmallPtrSet<const MDNode *, 16> &getProcessedSPNodes() { + return ProcessedSPNodes; + } }; } // End of namespace llvm |
