1 //===- llvm/CodeGen/DwarfDebug.h - Dwarf Debug Framework --------*- C++ -*-===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file contains support for writing dwarf debug info into asm files.
11 //===----------------------------------------------------------------------===//
13 #ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFDEBUG_H
14 #define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFDEBUG_H
16 #include "AddressPool.h"
17 #include "DebugLocStream.h"
18 #include "DebugLocEntry.h"
19 #include "DwarfFile.h"
20 #include "llvm/ADT/ArrayRef.h"
21 #include "llvm/ADT/DenseMap.h"
22 #include "llvm/ADT/DenseSet.h"
23 #include "llvm/ADT/MapVector.h"
24 #include "llvm/ADT/STLExtras.h"
25 #include "llvm/ADT/SetVector.h"
26 #include "llvm/ADT/SmallPtrSet.h"
27 #include "llvm/ADT/SmallVector.h"
28 #include "llvm/ADT/StringMap.h"
29 #include "llvm/ADT/StringRef.h"
30 #include "llvm/BinaryFormat/Dwarf.h"
31 #include "llvm/CodeGen/AccelTable.h"
32 #include "llvm/CodeGen/DbgEntityHistoryCalculator.h"
33 #include "llvm/CodeGen/DebugHandlerBase.h"
34 #include "llvm/CodeGen/MachineInstr.h"
35 #include "llvm/IR/DebugInfoMetadata.h"
36 #include "llvm/IR/DebugLoc.h"
37 #include "llvm/IR/Metadata.h"
38 #include "llvm/MC/MCDwarf.h"
39 #include "llvm/Support/Allocator.h"
40 #include "llvm/Target/TargetOptions.h"
54 class DwarfCompileUnit;
55 class DwarfExpression;
59 class MachineFunction;
65 //===----------------------------------------------------------------------===//
66 /// This class is defined as the common parent of DbgVariable and DbgLabel
67 /// such that it could levarage polymorphism to extract common code for
68 /// DbgVariable and DbgLabel.
71 const DILocation *InlinedAt;
72 DIE *TheDIE = nullptr;
81 DbgEntity(const DINode *N, const DILocation *IA, unsigned ID)
82 : Entity(N), InlinedAt(IA), SubclassID(ID) {}
83 virtual ~DbgEntity() {}
87 const DINode *getEntity() const { return Entity; }
88 const DILocation *getInlinedAt() const { return InlinedAt; }
89 DIE *getDIE() const { return TheDIE; }
90 unsigned getDbgEntityID() const { return SubclassID; }
93 void setDIE(DIE &D) { TheDIE = &D; }
95 static bool classof(const DbgEntity *N) {
96 switch (N->getDbgEntityID()) {
106 //===----------------------------------------------------------------------===//
107 /// This class is used to track local variable information.
109 /// Variables can be created from allocas, in which case they're generated from
110 /// the MMI table. Such variables can have multiple expressions and frame
113 /// Variables can be created from \c DBG_VALUE instructions. Those whose
114 /// location changes over time use \a DebugLocListIndex, while those with a
115 /// single location use \a ValueLoc and (optionally) a single entry of \a Expr.
117 /// Variables that have been optimized out use none of these fields.
118 class DbgVariable : public DbgEntity {
119 /// Offset in DebugLocs.
120 unsigned DebugLocListIndex = ~0u;
121 /// Single value location description.
122 std::unique_ptr<DbgValueLoc> ValueLoc = nullptr;
124 struct FrameIndexExpr {
126 const DIExpression *Expr;
128 mutable SmallVector<FrameIndexExpr, 1>
129 FrameIndexExprs; /// Frame index + expression.
132 /// Construct a DbgVariable.
134 /// Creates a variable without any DW_AT_location. Call \a initializeMMI()
135 /// for MMI entries, or \a initializeDbgValue() for DBG_VALUE instructions.
136 DbgVariable(const DILocalVariable *V, const DILocation *IA)
137 : DbgEntity(V, IA, DbgVariableKind) {}
139 /// Initialize from the MMI table.
140 void initializeMMI(const DIExpression *E, int FI) {
141 assert(FrameIndexExprs.empty() && "Already initialized?");
142 assert(!ValueLoc.get() && "Already initialized?");
144 assert((!E || E->isValid()) && "Expected valid expression");
145 assert(FI != std::numeric_limits<int>::max() && "Expected valid index");
147 FrameIndexExprs.push_back({FI, E});
150 // Initialize variable's location.
151 void initializeDbgValue(DbgValueLoc Value) {
152 assert(FrameIndexExprs.empty() && "Already initialized?");
153 assert(!ValueLoc && "Already initialized?");
154 assert(!Value.getExpression()->isFragment() && "Fragments not supported.");
156 ValueLoc = llvm::make_unique<DbgValueLoc>(Value);
157 if (auto *E = ValueLoc->getExpression())
158 if (E->getNumElements())
159 FrameIndexExprs.push_back({0, E});
162 /// Initialize from a DBG_VALUE instruction.
163 void initializeDbgValue(const MachineInstr *DbgValue);
166 const DILocalVariable *getVariable() const {
167 return cast<DILocalVariable>(getEntity());
170 const DIExpression *getSingleExpression() const {
171 assert(ValueLoc.get() && FrameIndexExprs.size() <= 1);
172 return FrameIndexExprs.size() ? FrameIndexExprs[0].Expr : nullptr;
175 void setDebugLocListIndex(unsigned O) { DebugLocListIndex = O; }
176 unsigned getDebugLocListIndex() const { return DebugLocListIndex; }
177 StringRef getName() const { return getVariable()->getName(); }
178 const DbgValueLoc *getValueLoc() const { return ValueLoc.get(); }
179 /// Get the FI entries, sorted by fragment offset.
180 ArrayRef<FrameIndexExpr> getFrameIndexExprs() const;
181 bool hasFrameIndexExprs() const { return !FrameIndexExprs.empty(); }
182 void addMMIEntry(const DbgVariable &V);
184 // Translate tag to proper Dwarf tag.
185 dwarf::Tag getTag() const {
186 // FIXME: Why don't we just infer this tag and store it all along?
187 if (getVariable()->isParameter())
188 return dwarf::DW_TAG_formal_parameter;
190 return dwarf::DW_TAG_variable;
193 /// Return true if DbgVariable is artificial.
194 bool isArtificial() const {
195 if (getVariable()->isArtificial())
197 if (getType()->isArtificial())
202 bool isObjectPointer() const {
203 if (getVariable()->isObjectPointer())
205 if (getType()->isObjectPointer())
210 bool hasComplexAddress() const {
211 assert(ValueLoc.get() && "Expected DBG_VALUE, not MMI variable");
212 assert((FrameIndexExprs.empty() ||
213 (FrameIndexExprs.size() == 1 &&
214 FrameIndexExprs[0].Expr->getNumElements())) &&
215 "Invalid Expr for DBG_VALUE");
216 return !FrameIndexExprs.empty();
219 bool isBlockByrefVariable() const;
220 const DIType *getType() const;
222 static bool classof(const DbgEntity *N) {
223 return N->getDbgEntityID() == DbgVariableKind;
227 //===----------------------------------------------------------------------===//
228 /// This class is used to track label information.
230 /// Labels are collected from \c DBG_LABEL instructions.
231 class DbgLabel : public DbgEntity {
232 const MCSymbol *Sym; /// Symbol before DBG_LABEL instruction.
235 /// We need MCSymbol information to generate DW_AT_low_pc.
236 DbgLabel(const DILabel *L, const DILocation *IA, const MCSymbol *Sym = nullptr)
237 : DbgEntity(L, IA, DbgLabelKind), Sym(Sym) {}
241 const DILabel *getLabel() const { return cast<DILabel>(getEntity()); }
242 const MCSymbol *getSymbol() const { return Sym; }
244 StringRef getName() const { return getLabel()->getName(); }
247 /// Translate tag to proper Dwarf tag.
248 dwarf::Tag getTag() const {
249 return dwarf::DW_TAG_label;
252 static bool classof(const DbgEntity *N) {
253 return N->getDbgEntityID() == DbgLabelKind;
257 /// Helper used to pair up a symbol and its DWARF compile unit.
259 SymbolCU(DwarfCompileUnit *CU, const MCSymbol *Sym) : Sym(Sym), CU(CU) {}
262 DwarfCompileUnit *CU;
265 /// The kind of accelerator tables we should emit.
266 enum class AccelTableKind {
267 Default, ///< Platform default.
269 Apple, ///< .apple_names, .apple_namespaces, .apple_types, .apple_objc.
270 Dwarf, ///< DWARF v5 .debug_names.
273 /// Collects and handles dwarf debug information.
274 class DwarfDebug : public DebugHandlerBase {
275 /// All DIEValues are allocated through this allocator.
276 BumpPtrAllocator DIEValueAllocator;
278 /// Maps MDNode with its corresponding DwarfCompileUnit.
279 MapVector<const MDNode *, DwarfCompileUnit *> CUMap;
281 /// Maps a CU DIE with its corresponding DwarfCompileUnit.
282 DenseMap<const DIE *, DwarfCompileUnit *> CUDieMap;
284 /// List of all labels used in aranges generation.
285 std::vector<SymbolCU> ArangeLabels;
287 /// Size of each symbol emitted (for those symbols that have a specific size).
288 DenseMap<const MCSymbol *, uint64_t> SymSize;
290 /// Collection of abstract variables/labels.
291 SmallVector<std::unique_ptr<DbgEntity>, 64> ConcreteEntities;
293 /// Collection of DebugLocEntry. Stored in a linked list so that DIELocLists
294 /// can refer to them in spite of insertions into this list.
295 DebugLocStream DebugLocs;
297 /// This is a collection of subprogram MDNodes that are processed to
299 SetVector<const DISubprogram *, SmallVector<const DISubprogram *, 16>,
300 SmallPtrSet<const DISubprogram *, 16>>
303 /// If nonnull, stores the current machine function we're processing.
304 const MachineFunction *CurFn = nullptr;
306 /// If nonnull, stores the CU in which the previous subprogram was contained.
307 const DwarfCompileUnit *PrevCU;
309 /// As an optimization, there is no need to emit an entry in the directory
310 /// table for the same directory as DW_AT_comp_dir.
311 StringRef CompilationDir;
313 /// Holder for the file specific debug information.
314 DwarfFile InfoHolder;
316 /// Holders for the various debug information flags that we might need to
317 /// have exposed. See accessor functions below for description.
319 /// Map from MDNodes for user-defined types to their type signatures. Also
320 /// used to keep track of which types we have emitted type units for.
321 DenseMap<const MDNode *, uint64_t> TypeSignatures;
323 DenseMap<const MCSection *, const MCSymbol *> SectionLabels;
326 std::pair<std::unique_ptr<DwarfTypeUnit>, const DICompositeType *>, 1>
327 TypeUnitsUnderConstruction;
329 /// Whether to use the GNU TLS opcode (instead of the standard opcode).
330 bool UseGNUTLSOpcode;
332 /// Whether to use DWARF 2 bitfields (instead of the DWARF 4 format).
333 bool UseDWARF2Bitfields;
335 /// Whether to emit all linkage names, or just abstract subprograms.
336 bool UseAllLinkageNames;
338 /// Use inlined strings.
339 bool UseInlineStrings = false;
341 /// Allow emission of .debug_ranges section.
342 bool UseRangesSection = true;
344 /// True if the sections itself must be used as references and don't create
345 /// temp symbols inside DWARF sections.
346 bool UseSectionsAsReferences = false;
348 ///Allow emission of the .debug_loc section.
349 bool UseLocSection = true;
351 /// Generate DWARF v4 type units.
352 bool GenerateTypeUnits;
354 /// DWARF5 Experimental Options
356 AccelTableKind TheAccelTableKind;
357 bool HasAppleExtensionAttributes;
360 /// Whether to generate the DWARF v5 string offsets table.
361 /// It consists of a series of contributions, each preceded by a header.
362 /// The pre-DWARF v5 string offsets table for split dwarf is, in contrast,
363 /// a monolithic sequence of string offsets.
364 bool UseSegmentedStringOffsetsTable;
366 /// Separated Dwarf Variables
367 /// In general these will all be for bits that are left in the
368 /// original object file, rather than things that are meant
369 /// to be in the .dwo sections.
371 /// Holder for the skeleton information.
372 DwarfFile SkeletonHolder;
374 /// Store file names for type units under fission in a line table
375 /// header that will be emitted into debug_line.dwo.
376 // FIXME: replace this with a map from comp_dir to table so that we
377 // can emit multiple tables during LTO each of which uses directory
378 // 0, referencing the comp_dir of all the type units that use it.
379 MCDwarfDwoLineTable SplitTypeUnitFileTable;
382 /// True iff there are multiple CUs in this module.
386 AddressPool AddrPool;
388 /// Accelerator tables.
389 AccelTable<DWARF5AccelTableData> AccelDebugNames;
390 AccelTable<AppleAccelTableOffsetData> AccelNames;
391 AccelTable<AppleAccelTableOffsetData> AccelObjC;
392 AccelTable<AppleAccelTableOffsetData> AccelNamespace;
393 AccelTable<AppleAccelTableTypeData> AccelTypes;
395 // Identify a debugger for "tuning" the debug info.
396 DebuggerKind DebuggerTuning = DebuggerKind::Default;
398 MCDwarfDwoLineTable *getDwoLineTable(const DwarfCompileUnit &);
400 const SmallVectorImpl<std::unique_ptr<DwarfCompileUnit>> &getUnits() {
401 return InfoHolder.getUnits();
404 using InlinedEntity = DbgValueHistoryMap::InlinedEntity;
406 void ensureAbstractEntityIsCreated(DwarfCompileUnit &CU,
408 const MDNode *Scope);
409 void ensureAbstractEntityIsCreatedIfScoped(DwarfCompileUnit &CU,
411 const MDNode *Scope);
413 DbgEntity *createConcreteEntity(DwarfCompileUnit &TheCU,
416 const DILocation *Location,
417 const MCSymbol *Sym = nullptr);
419 /// Construct a DIE for this abstract scope.
420 void constructAbstractSubprogramScopeDIE(DwarfCompileUnit &SrcCU, LexicalScope *Scope);
422 /// Construct DIEs for call site entries describing the calls in \p MF.
423 void constructCallSiteEntryDIEs(const DISubprogram &SP, DwarfCompileUnit &CU,
424 DIE &ScopeDIE, const MachineFunction &MF);
426 template <typename DataT>
427 void addAccelNameImpl(const DICompileUnit &CU, AccelTable<DataT> &AppleAccel,
428 StringRef Name, const DIE &Die);
430 void finishEntityDefinitions();
432 void finishSubprogramDefinitions();
434 /// Finish off debug information after all functions have been
436 void finalizeModuleInfo();
438 /// Emit the debug info section.
439 void emitDebugInfo();
441 /// Emit the abbreviation section.
442 void emitAbbreviations();
444 /// Emit the string offsets table header.
445 void emitStringOffsetsTableHeader();
447 /// Emit a specified accelerator table.
448 template <typename AccelTableT>
449 void emitAccel(AccelTableT &Accel, MCSection *Section, StringRef TableName);
451 /// Emit DWARF v5 accelerator table.
452 void emitAccelDebugNames();
454 /// Emit visible names into a hashed accelerator table section.
455 void emitAccelNames();
457 /// Emit objective C classes and categories into a hashed
458 /// accelerator table section.
459 void emitAccelObjC();
461 /// Emit namespace dies into a hashed accelerator table.
462 void emitAccelNamespaces();
464 /// Emit type dies into a hashed accelerator table.
465 void emitAccelTypes();
467 /// Emit visible names and types into debug pubnames and pubtypes sections.
468 void emitDebugPubSections();
470 void emitDebugPubSection(bool GnuStyle, StringRef Name,
471 DwarfCompileUnit *TheU,
472 const StringMap<const DIE *> &Globals);
474 /// Emit null-terminated strings into a debug str section.
477 /// Emit variable locations into a debug loc section.
480 /// Emit variable locations into a debug loc dwo section.
481 void emitDebugLocDWO();
483 /// Emit address ranges into a debug aranges section.
484 void emitDebugARanges();
486 /// Emit address ranges into a debug ranges section.
487 void emitDebugRanges();
488 void emitDebugRangesDWO();
490 /// Emit macros into a debug macinfo section.
491 void emitDebugMacinfo();
492 void emitMacro(DIMacro &M);
493 void emitMacroFile(DIMacroFile &F, DwarfCompileUnit &U);
494 void handleMacroNodes(DIMacroNodeArray Nodes, DwarfCompileUnit &U);
496 /// DWARF 5 Experimental Split Dwarf Emitters
498 /// Initialize common features of skeleton units.
499 void initSkeletonUnit(const DwarfUnit &U, DIE &Die,
500 std::unique_ptr<DwarfCompileUnit> NewU);
502 /// Construct the split debug info compile unit for the debug info section.
503 /// In DWARF v5, the skeleton unit DIE may have the following attributes:
504 /// DW_AT_addr_base, DW_AT_comp_dir, DW_AT_dwo_name, DW_AT_high_pc,
505 /// DW_AT_low_pc, DW_AT_ranges, DW_AT_stmt_list, and DW_AT_str_offsets_base.
506 /// Prior to DWARF v5 it may also have DW_AT_GNU_dwo_id. DW_AT_GNU_dwo_name
507 /// is used instead of DW_AT_dwo_name, Dw_AT_GNU_addr_base instead of
508 /// DW_AT_addr_base, and DW_AT_GNU_ranges_base instead of DW_AT_rnglists_base.
509 DwarfCompileUnit &constructSkeletonCU(const DwarfCompileUnit &CU);
511 /// Emit the debug info dwo section.
512 void emitDebugInfoDWO();
514 /// Emit the debug abbrev dwo section.
515 void emitDebugAbbrevDWO();
517 /// Emit the debug line dwo section.
518 void emitDebugLineDWO();
520 /// Emit the dwo stringoffsets table header.
521 void emitStringOffsetsTableHeaderDWO();
523 /// Emit the debug str dwo section.
524 void emitDebugStrDWO();
526 /// Emit DWO addresses.
527 void emitDebugAddr();
529 /// Flags to let the linker know we have emitted new style pubnames. Only
530 /// emit it here if we don't have a skeleton CU for split dwarf.
531 void addGnuPubAttributes(DwarfCompileUnit &U, DIE &D) const;
533 /// Create new DwarfCompileUnit for the given metadata node with tag
534 /// DW_TAG_compile_unit.
535 DwarfCompileUnit &getOrCreateDwarfCompileUnit(const DICompileUnit *DIUnit);
536 void finishUnitAttributes(const DICompileUnit *DIUnit,
537 DwarfCompileUnit &NewCU);
539 /// Construct imported_module or imported_declaration DIE.
540 void constructAndAddImportedEntityDIE(DwarfCompileUnit &TheCU,
541 const DIImportedEntity *N);
543 /// Register a source line with debug info. Returns the unique
544 /// label that was emitted and which provides correspondence to the
545 /// source line list.
546 void recordSourceLine(unsigned Line, unsigned Col, const MDNode *Scope,
549 /// Populate LexicalScope entries with variables' info.
550 void collectEntityInfo(DwarfCompileUnit &TheCU, const DISubprogram *SP,
551 DenseSet<InlinedEntity> &ProcessedVars);
553 /// Build the location list for all DBG_VALUEs in the
554 /// function that describe the same variable. If the resulting
555 /// list has only one entry that is valid for entire variable's
556 /// scope return true.
557 bool buildLocationList(SmallVectorImpl<DebugLocEntry> &DebugLoc,
558 const DbgValueHistoryMap::Entries &Entries);
560 /// Collect variable information from the side table maintained by MF.
561 void collectVariableInfoFromMFTable(DwarfCompileUnit &TheCU,
562 DenseSet<InlinedEntity> &P);
564 /// Emit the reference to the section.
565 void emitSectionReference(const DwarfCompileUnit &CU);
568 /// Gather pre-function debug information.
569 void beginFunctionImpl(const MachineFunction *MF) override;
571 /// Gather and emit post-function debug information.
572 void endFunctionImpl(const MachineFunction *MF) override;
574 void skippedNonDebugFunction() override;
577 //===--------------------------------------------------------------------===//
578 // Main entry points.
580 DwarfDebug(AsmPrinter *A, Module *M);
582 ~DwarfDebug() override;
584 /// Emit all Dwarf sections that should come prior to the
588 /// Emit all Dwarf sections that should come after the content.
589 void endModule() override;
591 /// Emits inital debug location directive.
592 DebugLoc emitInitialLocDirective(const MachineFunction &MF, unsigned CUID);
594 /// Process beginning of an instruction.
595 void beginInstruction(const MachineInstr *MI) override;
597 /// Perform an MD5 checksum of \p Identifier and return the lower 64 bits.
598 static uint64_t makeTypeSignature(StringRef Identifier);
600 /// Add a DIE to the set of types that we're going to pull into
602 void addDwarfTypeUnitType(DwarfCompileUnit &CU, StringRef Identifier,
603 DIE &Die, const DICompositeType *CTy);
605 friend class NonTypeUnitContext;
606 class NonTypeUnitContext {
608 decltype(DwarfDebug::TypeUnitsUnderConstruction) TypeUnitsUnderConstruction;
609 friend class DwarfDebug;
610 NonTypeUnitContext(DwarfDebug *DD);
612 NonTypeUnitContext(NonTypeUnitContext&&) = default;
613 ~NonTypeUnitContext();
616 NonTypeUnitContext enterNonTypeUnitContext();
618 /// Add a label so that arange data can be generated for it.
619 void addArangeLabel(SymbolCU SCU) { ArangeLabels.push_back(SCU); }
621 /// For symbols that have a size designated (e.g. common symbols),
622 /// this tracks that size.
623 void setSymbolSize(const MCSymbol *Sym, uint64_t Size) override {
627 /// Returns whether we should emit all DW_AT_[MIPS_]linkage_name.
628 /// If not, we still might emit certain cases.
629 bool useAllLinkageNames() const { return UseAllLinkageNames; }
631 /// Returns whether to use DW_OP_GNU_push_tls_address, instead of the
632 /// standard DW_OP_form_tls_address opcode
633 bool useGNUTLSOpcode() const { return UseGNUTLSOpcode; }
635 /// Returns whether to use the DWARF2 format for bitfields instyead of the
637 bool useDWARF2Bitfields() const { return UseDWARF2Bitfields; }
639 /// Returns whether to use inline strings.
640 bool useInlineStrings() const { return UseInlineStrings; }
642 /// Returns whether ranges section should be emitted.
643 bool useRangesSection() const { return UseRangesSection; }
645 /// Returns whether to use sections as labels rather than temp symbols.
646 bool useSectionsAsReferences() const {
647 return UseSectionsAsReferences;
650 /// Returns whether .debug_loc section should be emitted.
651 bool useLocSection() const { return UseLocSection; }
653 /// Returns whether to generate DWARF v4 type units.
654 bool generateTypeUnits() const { return GenerateTypeUnits; }
656 // Experimental DWARF5 features.
658 /// Returns what kind (if any) of accelerator tables to emit.
659 AccelTableKind getAccelTableKind() const { return TheAccelTableKind; }
661 bool useAppleExtensionAttributes() const {
662 return HasAppleExtensionAttributes;
665 /// Returns whether or not to change the current debug info for the
666 /// split dwarf proposal support.
667 bool useSplitDwarf() const { return HasSplitDwarf; }
669 /// Returns whether to generate a string offsets table with (possibly shared)
670 /// contributions from each CU and type unit. This implies the use of
671 /// DW_FORM_strx* indirect references with DWARF v5 and beyond. Note that
672 /// DW_FORM_GNU_str_index is also an indirect reference, but it is used with
673 /// a pre-DWARF v5 implementation of split DWARF sections, which uses a
674 /// monolithic string offsets table.
675 bool useSegmentedStringOffsetsTable() const {
676 return UseSegmentedStringOffsetsTable;
679 bool shareAcrossDWOCUs() const;
681 /// Returns the Dwarf Version.
682 uint16_t getDwarfVersion() const;
684 /// Returns the previous CU that was being updated
685 const DwarfCompileUnit *getPrevCU() const { return PrevCU; }
686 void setPrevCU(const DwarfCompileUnit *PrevCU) { this->PrevCU = PrevCU; }
688 /// Returns the entries for the .debug_loc section.
689 const DebugLocStream &getDebugLocs() const { return DebugLocs; }
691 /// Emit an entry for the debug loc section. This can be used to
692 /// handle an entry that's going to be emitted into the debug loc section.
693 void emitDebugLocEntry(ByteStreamer &Streamer,
694 const DebugLocStream::Entry &Entry,
695 const DwarfCompileUnit *CU);
697 /// Emit the location for a debug loc entry, including the size header.
698 void emitDebugLocEntryLocation(const DebugLocStream::Entry &Entry,
699 const DwarfCompileUnit *CU);
701 void addSubprogramNames(const DICompileUnit &CU, const DISubprogram *SP,
704 AddressPool &getAddressPool() { return AddrPool; }
706 void addAccelName(const DICompileUnit &CU, StringRef Name, const DIE &Die);
708 void addAccelObjC(const DICompileUnit &CU, StringRef Name, const DIE &Die);
710 void addAccelNamespace(const DICompileUnit &CU, StringRef Name,
713 void addAccelType(const DICompileUnit &CU, StringRef Name, const DIE &Die,
716 const MachineFunction *getCurrentFunction() const { return CurFn; }
718 /// A helper function to check whether the DIE for a given Scope is
719 /// going to be null.
720 bool isLexicalScopeDIENull(LexicalScope *Scope);
722 /// Find the matching DwarfCompileUnit for the given CU DIE.
723 DwarfCompileUnit *lookupCU(const DIE *Die) { return CUDieMap.lookup(Die); }
724 const DwarfCompileUnit *lookupCU(const DIE *Die) const {
725 return CUDieMap.lookup(Die);
728 /// \defgroup DebuggerTuning Predicates to tune DWARF for a given debugger.
730 /// Returns whether we are "tuning" for a given debugger.
732 bool tuneForGDB() const { return DebuggerTuning == DebuggerKind::GDB; }
733 bool tuneForLLDB() const { return DebuggerTuning == DebuggerKind::LLDB; }
734 bool tuneForSCE() const { return DebuggerTuning == DebuggerKind::SCE; }
737 void addSectionLabel(const MCSymbol *Sym);
738 const MCSymbol *getSectionLabel(const MCSection *S);
740 static void emitDebugLocValue(const AsmPrinter &AP, const DIBasicType *BT,
741 const DbgValueLoc &Value,
742 DwarfExpression &DwarfExpr);
745 } // end namespace llvm
747 #endif // LLVM_LIB_CODEGEN_ASMPRINTER_DWARFDEBUG_H