1 //===-- llvm/CodeGen/DwarfWriter.cpp - Dwarf Framework ----------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains support for writing dwarf info into asm files.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/CodeGen/DwarfWriter.h"
15 #include "llvm/Module.h"
16 #include "llvm/DerivedTypes.h"
17 #include "llvm/Constants.h"
18 #include "llvm/CodeGen/AsmPrinter.h"
19 #include "llvm/CodeGen/MachineModuleInfo.h"
20 #include "llvm/CodeGen/MachineFrameInfo.h"
21 #include "llvm/CodeGen/MachineLocation.h"
22 #include "llvm/Analysis/DebugInfo.h"
23 #include "llvm/Support/Debug.h"
24 #include "llvm/Support/Dwarf.h"
25 #include "llvm/Support/CommandLine.h"
26 #include "llvm/Support/DataTypes.h"
27 #include "llvm/Support/Mangler.h"
28 #include "llvm/Support/raw_ostream.h"
29 #include "llvm/System/Path.h"
30 #include "llvm/Target/TargetAsmInfo.h"
31 #include "llvm/Target/TargetRegisterInfo.h"
32 #include "llvm/Target/TargetData.h"
33 #include "llvm/Target/TargetFrameInfo.h"
34 #include "llvm/Target/TargetInstrInfo.h"
35 #include "llvm/Target/TargetMachine.h"
36 #include "llvm/Target/TargetOptions.h"
37 #include "llvm/ADT/DenseMap.h"
38 #include "llvm/ADT/FoldingSet.h"
39 #include "llvm/ADT/StringExtras.h"
40 #include "llvm/ADT/StringMap.h"
44 using namespace llvm::dwarf;
46 static RegisterPass<DwarfWriter>
47 X("dwarfwriter", "DWARF Information Writer");
48 char DwarfWriter::ID = 0;
52 //===----------------------------------------------------------------------===//
54 /// Configuration values for initial hash set sizes (log2).
56 static const unsigned InitDiesSetSize = 9; // log2(512)
57 static const unsigned InitAbbreviationsSetSize = 9; // log2(512)
58 static const unsigned InitValuesSetSize = 9; // log2(512)
60 //===----------------------------------------------------------------------===//
61 /// Forward declarations.
66 //===----------------------------------------------------------------------===//
69 /// getGlobalVariable - Return either a direct or cast Global value.
71 static GlobalVariable *getGlobalVariable(Value *V) {
72 if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
74 } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
75 if (CE->getOpcode() == Instruction::BitCast) {
76 return dyn_cast<GlobalVariable>(CE->getOperand(0));
77 } else if (CE->getOpcode() == Instruction::GetElementPtr) {
78 for (unsigned int i=1; i<CE->getNumOperands(); i++) {
79 if (!CE->getOperand(i)->isNullValue())
82 return dyn_cast<GlobalVariable>(CE->getOperand(0));
88 //===----------------------------------------------------------------------===//
89 /// DWLabel - Labels are used to track locations in the assembler file.
90 /// Labels appear in the form @verbatim <prefix><Tag><Number> @endverbatim,
91 /// where the tag is a category of label (Ex. location) and number is a value
92 /// unique in that category.
95 /// Tag - Label category tag. Should always be a staticly declared C string.
99 /// Number - Value to make label unique.
103 DWLabel(const char *T, unsigned N) : Tag(T), Number(N) {}
105 void Profile(FoldingSetNodeID &ID) const {
107 ID.AddInteger(Number);
111 void print(std::ostream *O) const {
114 void print(std::ostream &O) const {
116 if (Number) O << Number;
121 //===----------------------------------------------------------------------===//
122 /// DIEAbbrevData - Dwarf abbreviation data, describes the one attribute of a
123 /// Dwarf abbreviation.
124 class DIEAbbrevData {
126 /// Attribute - Dwarf attribute code.
130 /// Form - Dwarf form code.
135 DIEAbbrevData(unsigned A, unsigned F)
141 unsigned getAttribute() const { return Attribute; }
142 unsigned getForm() const { return Form; }
144 /// Profile - Used to gather unique data for the abbreviation folding set.
146 void Profile(FoldingSetNodeID &ID)const {
147 ID.AddInteger(Attribute);
152 //===----------------------------------------------------------------------===//
153 /// DIEAbbrev - Dwarf abbreviation, describes the organization of a debug
154 /// information object.
155 class DIEAbbrev : public FoldingSetNode {
157 /// Tag - Dwarf tag code.
161 /// Unique number for node.
165 /// ChildrenFlag - Dwarf children flag.
167 unsigned ChildrenFlag;
169 /// Data - Raw data bytes for abbreviation.
171 SmallVector<DIEAbbrevData, 8> Data;
175 DIEAbbrev(unsigned T, unsigned C)
183 unsigned getTag() const { return Tag; }
184 unsigned getNumber() const { return Number; }
185 unsigned getChildrenFlag() const { return ChildrenFlag; }
186 const SmallVector<DIEAbbrevData, 8> &getData() const { return Data; }
187 void setTag(unsigned T) { Tag = T; }
188 void setChildrenFlag(unsigned CF) { ChildrenFlag = CF; }
189 void setNumber(unsigned N) { Number = N; }
191 /// AddAttribute - Adds another set of attribute information to the
193 void AddAttribute(unsigned Attribute, unsigned Form) {
194 Data.push_back(DIEAbbrevData(Attribute, Form));
197 /// AddFirstAttribute - Adds a set of attribute information to the front
198 /// of the abbreviation.
199 void AddFirstAttribute(unsigned Attribute, unsigned Form) {
200 Data.insert(Data.begin(), DIEAbbrevData(Attribute, Form));
203 /// Profile - Used to gather unique data for the abbreviation folding set.
205 void Profile(FoldingSetNodeID &ID) {
207 ID.AddInteger(ChildrenFlag);
209 // For each attribute description.
210 for (unsigned i = 0, N = Data.size(); i < N; ++i)
214 /// Emit - Print the abbreviation using the specified Dwarf writer.
216 void Emit(const DwarfDebug &DD) const;
219 void print(std::ostream *O) {
222 void print(std::ostream &O);
227 //===----------------------------------------------------------------------===//
228 /// DIE - A structured debug information entry. Has an abbreviation which
229 /// describes it's organization.
230 class DIE : public FoldingSetNode {
232 /// Abbrev - Buffer for constructing abbreviation.
236 /// Offset - Offset in debug info section.
240 /// Size - Size of instance + children.
246 std::vector<DIE *> Children;
248 /// Attributes values.
250 SmallVector<DIEValue*, 32> Values;
253 explicit DIE(unsigned Tag)
254 : Abbrev(Tag, DW_CHILDREN_no)
263 DIEAbbrev &getAbbrev() { return Abbrev; }
264 unsigned getAbbrevNumber() const {
265 return Abbrev.getNumber();
267 unsigned getTag() const { return Abbrev.getTag(); }
268 unsigned getOffset() const { return Offset; }
269 unsigned getSize() const { return Size; }
270 const std::vector<DIE *> &getChildren() const { return Children; }
271 SmallVector<DIEValue*, 32> &getValues() { return Values; }
272 void setTag(unsigned Tag) { Abbrev.setTag(Tag); }
273 void setOffset(unsigned O) { Offset = O; }
274 void setSize(unsigned S) { Size = S; }
276 /// AddValue - Add a value and attributes to a DIE.
278 void AddValue(unsigned Attribute, unsigned Form, DIEValue *Value) {
279 Abbrev.AddAttribute(Attribute, Form);
280 Values.push_back(Value);
283 /// SiblingOffset - Return the offset of the debug information entry's
285 unsigned SiblingOffset() const { return Offset + Size; }
287 /// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
289 void AddSiblingOffset();
291 /// AddChild - Add a child to the DIE.
293 void AddChild(DIE *Child) {
294 Abbrev.setChildrenFlag(DW_CHILDREN_yes);
295 Children.push_back(Child);
298 /// Detach - Detaches objects connected to it after copying.
304 /// Profile - Used to gather unique data for the value folding set.
306 void Profile(FoldingSetNodeID &ID) ;
309 void print(std::ostream *O, unsigned IncIndent = 0) {
310 if (O) print(*O, IncIndent);
312 void print(std::ostream &O, unsigned IncIndent = 0);
317 //===----------------------------------------------------------------------===//
318 /// DIEValue - A debug information entry value.
320 class DIEValue : public FoldingSetNode {
333 /// Type - Type of data stored in the value.
337 explicit DIEValue(unsigned T)
340 virtual ~DIEValue() {}
343 unsigned getType() const { return Type; }
345 // Implement isa/cast/dyncast.
346 static bool classof(const DIEValue *) { return true; }
348 /// EmitValue - Emit value via the Dwarf writer.
350 virtual void EmitValue(DwarfDebug &DD, unsigned Form) = 0;
352 /// SizeOf - Return the size of a value in bytes.
354 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const = 0;
356 /// Profile - Used to gather unique data for the value folding set.
358 virtual void Profile(FoldingSetNodeID &ID) = 0;
361 void print(std::ostream *O) {
364 virtual void print(std::ostream &O) = 0;
369 //===----------------------------------------------------------------------===//
370 /// DWInteger - An integer value DIE.
372 class DIEInteger : public DIEValue {
377 explicit DIEInteger(uint64_t I) : DIEValue(isInteger), Integer(I) {}
379 // Implement isa/cast/dyncast.
380 static bool classof(const DIEInteger *) { return true; }
381 static bool classof(const DIEValue *I) { return I->Type == isInteger; }
383 /// BestForm - Choose the best form for integer.
385 static unsigned BestForm(bool IsSigned, uint64_t Integer) {
387 if ((char)Integer == (signed)Integer) return DW_FORM_data1;
388 if ((short)Integer == (signed)Integer) return DW_FORM_data2;
389 if ((int)Integer == (signed)Integer) return DW_FORM_data4;
391 if ((unsigned char)Integer == Integer) return DW_FORM_data1;
392 if ((unsigned short)Integer == Integer) return DW_FORM_data2;
393 if ((unsigned int)Integer == Integer) return DW_FORM_data4;
395 return DW_FORM_data8;
398 /// EmitValue - Emit integer of appropriate size.
400 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
402 /// SizeOf - Determine size of integer value in bytes.
404 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
406 /// Profile - Used to gather unique data for the value folding set.
408 static void Profile(FoldingSetNodeID &ID, unsigned Integer) {
409 ID.AddInteger(isInteger);
410 ID.AddInteger(Integer);
412 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Integer); }
415 virtual void print(std::ostream &O) {
416 O << "Int: " << (int64_t)Integer
417 << " 0x" << std::hex << Integer << std::dec;
422 //===----------------------------------------------------------------------===//
423 /// DIEString - A string value DIE.
425 class DIEString : public DIEValue {
427 const std::string String;
429 explicit DIEString(const std::string &S) : DIEValue(isString), String(S) {}
431 // Implement isa/cast/dyncast.
432 static bool classof(const DIEString *) { return true; }
433 static bool classof(const DIEValue *S) { return S->Type == isString; }
435 /// EmitValue - Emit string value.
437 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
439 /// SizeOf - Determine size of string value in bytes.
441 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
442 return String.size() + sizeof(char); // sizeof('\0');
445 /// Profile - Used to gather unique data for the value folding set.
447 static void Profile(FoldingSetNodeID &ID, const std::string &String) {
448 ID.AddInteger(isString);
449 ID.AddString(String);
451 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, String); }
454 virtual void print(std::ostream &O) {
455 O << "Str: \"" << String << "\"";
460 //===----------------------------------------------------------------------===//
461 /// DIEDwarfLabel - A Dwarf internal label expression DIE.
463 class DIEDwarfLabel : public DIEValue {
468 explicit DIEDwarfLabel(const DWLabel &L) : DIEValue(isLabel), Label(L) {}
470 // Implement isa/cast/dyncast.
471 static bool classof(const DIEDwarfLabel *) { return true; }
472 static bool classof(const DIEValue *L) { return L->Type == isLabel; }
474 /// EmitValue - Emit label value.
476 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
478 /// SizeOf - Determine size of label value in bytes.
480 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
482 /// Profile - Used to gather unique data for the value folding set.
484 static void Profile(FoldingSetNodeID &ID, const DWLabel &Label) {
485 ID.AddInteger(isLabel);
488 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label); }
491 virtual void print(std::ostream &O) {
499 //===----------------------------------------------------------------------===//
500 /// DIEObjectLabel - A label to an object in code or data.
502 class DIEObjectLabel : public DIEValue {
504 const std::string Label;
506 explicit DIEObjectLabel(const std::string &L)
507 : DIEValue(isAsIsLabel), Label(L) {}
509 // Implement isa/cast/dyncast.
510 static bool classof(const DIEObjectLabel *) { return true; }
511 static bool classof(const DIEValue *L) { return L->Type == isAsIsLabel; }
513 /// EmitValue - Emit label value.
515 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
517 /// SizeOf - Determine size of label value in bytes.
519 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
521 /// Profile - Used to gather unique data for the value folding set.
523 static void Profile(FoldingSetNodeID &ID, const std::string &Label) {
524 ID.AddInteger(isAsIsLabel);
527 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label.c_str()); }
530 virtual void print(std::ostream &O) {
531 O << "Obj: " << Label;
536 //===----------------------------------------------------------------------===//
537 /// DIESectionOffset - A section offset DIE.
539 class DIESectionOffset : public DIEValue {
542 const DWLabel Section;
546 DIESectionOffset(const DWLabel &Lab, const DWLabel &Sec,
547 bool isEH = false, bool useSet = true)
548 : DIEValue(isSectionOffset), Label(Lab), Section(Sec),
549 IsEH(isEH), UseSet(useSet) {}
551 // Implement isa/cast/dyncast.
552 static bool classof(const DIESectionOffset *) { return true; }
553 static bool classof(const DIEValue *D) { return D->Type == isSectionOffset; }
555 /// EmitValue - Emit section offset.
557 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
559 /// SizeOf - Determine size of section offset value in bytes.
561 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
563 /// Profile - Used to gather unique data for the value folding set.
565 static void Profile(FoldingSetNodeID &ID, const DWLabel &Label,
566 const DWLabel &Section) {
567 ID.AddInteger(isSectionOffset);
570 // IsEH and UseSet are specific to the Label/Section that we will emit
571 // the offset for; so Label/Section are enough for uniqueness.
573 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, Label, Section); }
576 virtual void print(std::ostream &O) {
581 O << "-" << IsEH << "-" << UseSet;
586 //===----------------------------------------------------------------------===//
587 /// DIEDelta - A simple label difference DIE.
589 class DIEDelta : public DIEValue {
591 const DWLabel LabelHi;
592 const DWLabel LabelLo;
594 DIEDelta(const DWLabel &Hi, const DWLabel &Lo)
595 : DIEValue(isDelta), LabelHi(Hi), LabelLo(Lo) {}
597 // Implement isa/cast/dyncast.
598 static bool classof(const DIEDelta *) { return true; }
599 static bool classof(const DIEValue *D) { return D->Type == isDelta; }
601 /// EmitValue - Emit delta value.
603 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
605 /// SizeOf - Determine size of delta value in bytes.
607 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
609 /// Profile - Used to gather unique data for the value folding set.
611 static void Profile(FoldingSetNodeID &ID, const DWLabel &LabelHi,
612 const DWLabel &LabelLo) {
613 ID.AddInteger(isDelta);
617 virtual void Profile(FoldingSetNodeID &ID) { Profile(ID, LabelHi, LabelLo); }
620 virtual void print(std::ostream &O) {
629 //===----------------------------------------------------------------------===//
630 /// DIEntry - A pointer to another debug information entry. An instance of this
631 /// class can also be used as a proxy for a debug information entry not yet
632 /// defined (ie. types.)
633 class DIEntry : public DIEValue {
637 explicit DIEntry(DIE *E) : DIEValue(isEntry), Entry(E) {}
639 // Implement isa/cast/dyncast.
640 static bool classof(const DIEntry *) { return true; }
641 static bool classof(const DIEValue *E) { return E->Type == isEntry; }
643 /// EmitValue - Emit debug information entry offset.
645 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
647 /// SizeOf - Determine size of debug information entry in bytes.
649 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const {
650 return sizeof(int32_t);
653 /// Profile - Used to gather unique data for the value folding set.
655 static void Profile(FoldingSetNodeID &ID, DIE *Entry) {
656 ID.AddInteger(isEntry);
657 ID.AddPointer(Entry);
659 virtual void Profile(FoldingSetNodeID &ID) {
660 ID.AddInteger(isEntry);
663 ID.AddPointer(Entry);
670 virtual void print(std::ostream &O) {
671 O << "Die: 0x" << std::hex << (intptr_t)Entry << std::dec;
676 //===----------------------------------------------------------------------===//
677 /// DIEBlock - A block of values. Primarily used for location expressions.
679 class DIEBlock : public DIEValue, public DIE {
681 unsigned Size; // Size in bytes excluding size header.
691 // Implement isa/cast/dyncast.
692 static bool classof(const DIEBlock *) { return true; }
693 static bool classof(const DIEValue *E) { return E->Type == isBlock; }
695 /// ComputeSize - calculate the size of the block.
697 unsigned ComputeSize(DwarfDebug &DD);
699 /// BestForm - Choose the best form for data.
701 unsigned BestForm() const {
702 if ((unsigned char)Size == Size) return DW_FORM_block1;
703 if ((unsigned short)Size == Size) return DW_FORM_block2;
704 if ((unsigned int)Size == Size) return DW_FORM_block4;
705 return DW_FORM_block;
708 /// EmitValue - Emit block data.
710 virtual void EmitValue(DwarfDebug &DD, unsigned Form);
712 /// SizeOf - Determine size of block data in bytes.
714 virtual unsigned SizeOf(const DwarfDebug &DD, unsigned Form) const;
717 /// Profile - Used to gather unique data for the value folding set.
719 virtual void Profile(FoldingSetNodeID &ID) {
720 ID.AddInteger(isBlock);
725 virtual void print(std::ostream &O) {
732 //===----------------------------------------------------------------------===//
733 /// CompileUnit - This dwarf writer support class manages information associate
734 /// with a source file.
737 /// ID - File identifier for source.
741 /// Die - Compile unit debug information entry.
745 /// GVToDieMap - Tracks the mapping of unit level debug informaton
746 /// variables to debug information entries.
747 std::map<GlobalVariable *, DIE *> GVToDieMap;
749 /// GVToDIEntryMap - Tracks the mapping of unit level debug informaton
750 /// descriptors to debug information entries using a DIEntry proxy.
751 std::map<GlobalVariable *, DIEntry *> GVToDIEntryMap;
753 /// Globals - A map of globally visible named entities for this unit.
755 std::map<std::string, DIE *> Globals;
757 /// DiesSet - Used to uniquely define dies within the compile unit.
759 FoldingSet<DIE> DiesSet;
762 CompileUnit(unsigned I, DIE *D)
763 : ID(I), Die(D), GVToDieMap(),
764 GVToDIEntryMap(), Globals(), DiesSet(InitDiesSetSize)
772 unsigned getID() const { return ID; }
773 DIE* getDie() const { return Die; }
774 std::map<std::string, DIE *> &getGlobals() { return Globals; }
776 /// hasContent - Return true if this compile unit has something to write out.
778 bool hasContent() const {
779 return !Die->getChildren().empty();
782 /// AddGlobal - Add a new global entity to the compile unit.
784 void AddGlobal(const std::string &Name, DIE *Die) {
788 /// getDieMapSlotFor - Returns the debug information entry map slot for the
789 /// specified debug variable.
790 DIE *&getDieMapSlotFor(GlobalVariable *GV) {
791 return GVToDieMap[GV];
794 /// getDIEntrySlotFor - Returns the debug information entry proxy slot for the
795 /// specified debug variable.
796 DIEntry *&getDIEntrySlotFor(GlobalVariable *GV) {
797 return GVToDIEntryMap[GV];
800 /// AddDie - Adds or interns the DIE to the compile unit.
802 DIE *AddDie(DIE &Buffer) {
806 DIE *Die = DiesSet.FindNodeOrInsertPos(ID, Where);
809 Die = new DIE(Buffer);
810 DiesSet.InsertNode(Die, Where);
811 this->Die->AddChild(Die);
819 //===----------------------------------------------------------------------===//
820 /// Dwarf - Emits general Dwarf directives.
824 //===--------------------------------------------------------------------===//
825 // Core attributes used by the Dwarf writer.
829 /// O - Stream to .s file.
833 /// Asm - Target of Dwarf emission.
837 /// TAI - Target asm information.
838 const TargetAsmInfo *TAI;
840 /// TD - Target data.
841 const TargetData *TD;
843 /// RI - Register Information.
844 const TargetRegisterInfo *RI;
846 /// M - Current module.
850 /// MF - Current machine function.
854 /// MMI - Collected machine module information.
856 MachineModuleInfo *MMI;
858 /// SubprogramCount - The running count of functions being compiled.
860 unsigned SubprogramCount;
862 /// Flavor - A unique string indicating what dwarf producer this is, used to
864 const char * const Flavor;
867 Dwarf(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T,
872 , TD(Asm->TM.getTargetData())
873 , RI(Asm->TM.getRegisterInfo())
884 //===--------------------------------------------------------------------===//
887 AsmPrinter *getAsm() const { return Asm; }
888 MachineModuleInfo *getMMI() const { return MMI; }
889 const TargetAsmInfo *getTargetAsmInfo() const { return TAI; }
890 const TargetData *getTargetData() const { return TD; }
892 void PrintRelDirective(bool Force32Bit = false, bool isInSection = false)
894 if (isInSection && TAI->getDwarfSectionOffsetDirective())
895 O << TAI->getDwarfSectionOffsetDirective();
896 else if (Force32Bit || TD->getPointerSize() == sizeof(int32_t))
897 O << TAI->getData32bitsDirective();
899 O << TAI->getData64bitsDirective();
902 /// PrintLabelName - Print label name in form used by Dwarf writer.
904 void PrintLabelName(DWLabel Label) const {
905 PrintLabelName(Label.Tag, Label.Number);
907 void PrintLabelName(const char *Tag, unsigned Number) const {
908 O << TAI->getPrivateGlobalPrefix() << Tag;
909 if (Number) O << Number;
912 void PrintLabelName(const char *Tag, unsigned Number,
913 const char *Suffix) const {
914 O << TAI->getPrivateGlobalPrefix() << Tag;
915 if (Number) O << Number;
919 /// EmitLabel - Emit location label for internal use by Dwarf.
921 void EmitLabel(DWLabel Label) const {
922 EmitLabel(Label.Tag, Label.Number);
924 void EmitLabel(const char *Tag, unsigned Number) const {
925 PrintLabelName(Tag, Number);
929 /// EmitReference - Emit a reference to a label.
931 void EmitReference(DWLabel Label, bool IsPCRelative = false,
932 bool Force32Bit = false) const {
933 EmitReference(Label.Tag, Label.Number, IsPCRelative, Force32Bit);
935 void EmitReference(const char *Tag, unsigned Number,
936 bool IsPCRelative = false, bool Force32Bit = false) const {
937 PrintRelDirective(Force32Bit);
938 PrintLabelName(Tag, Number);
940 if (IsPCRelative) O << "-" << TAI->getPCSymbol();
942 void EmitReference(const std::string &Name, bool IsPCRelative = false,
943 bool Force32Bit = false) const {
944 PrintRelDirective(Force32Bit);
948 if (IsPCRelative) O << "-" << TAI->getPCSymbol();
951 /// EmitDifference - Emit the difference between two labels. Some
952 /// assemblers do not behave with absolute expressions with data directives,
953 /// so there is an option (needsSet) to use an intermediary set expression.
954 void EmitDifference(DWLabel LabelHi, DWLabel LabelLo,
955 bool IsSmall = false) {
956 EmitDifference(LabelHi.Tag, LabelHi.Number,
957 LabelLo.Tag, LabelLo.Number,
960 void EmitDifference(const char *TagHi, unsigned NumberHi,
961 const char *TagLo, unsigned NumberLo,
962 bool IsSmall = false) {
963 if (TAI->needsSet()) {
965 PrintLabelName("set", SetCounter, Flavor);
967 PrintLabelName(TagHi, NumberHi);
969 PrintLabelName(TagLo, NumberLo);
972 PrintRelDirective(IsSmall);
973 PrintLabelName("set", SetCounter, Flavor);
976 PrintRelDirective(IsSmall);
978 PrintLabelName(TagHi, NumberHi);
980 PrintLabelName(TagLo, NumberLo);
984 void EmitSectionOffset(const char* Label, const char* Section,
985 unsigned LabelNumber, unsigned SectionNumber,
986 bool IsSmall = false, bool isEH = false,
987 bool useSet = true) {
988 bool printAbsolute = false;
990 printAbsolute = TAI->isAbsoluteEHSectionOffsets();
992 printAbsolute = TAI->isAbsoluteDebugSectionOffsets();
994 if (TAI->needsSet() && useSet) {
996 PrintLabelName("set", SetCounter, Flavor);
998 PrintLabelName(Label, LabelNumber);
1000 if (!printAbsolute) {
1002 PrintLabelName(Section, SectionNumber);
1006 PrintRelDirective(IsSmall);
1008 PrintLabelName("set", SetCounter, Flavor);
1011 PrintRelDirective(IsSmall, true);
1013 PrintLabelName(Label, LabelNumber);
1015 if (!printAbsolute) {
1017 PrintLabelName(Section, SectionNumber);
1022 /// EmitFrameMoves - Emit frame instructions to describe the layout of the
1024 void EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
1025 const std::vector<MachineMove> &Moves, bool isEH) {
1027 Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
1028 TargetFrameInfo::StackGrowsUp ?
1029 TD->getPointerSize() : -TD->getPointerSize();
1030 bool IsLocal = BaseLabel && strcmp(BaseLabel, "label") == 0;
1032 for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
1033 const MachineMove &Move = Moves[i];
1034 unsigned LabelID = Move.getLabelID();
1037 LabelID = MMI->MappedLabel(LabelID);
1039 // Throw out move if the label is invalid.
1040 if (!LabelID) continue;
1043 const MachineLocation &Dst = Move.getDestination();
1044 const MachineLocation &Src = Move.getSource();
1046 // Advance row if new location.
1047 if (BaseLabel && LabelID && (BaseLabelID != LabelID || !IsLocal)) {
1048 Asm->EmitInt8(DW_CFA_advance_loc4);
1049 Asm->EOL("DW_CFA_advance_loc4");
1050 EmitDifference("label", LabelID, BaseLabel, BaseLabelID, true);
1053 BaseLabelID = LabelID;
1054 BaseLabel = "label";
1058 // If advancing cfa.
1059 if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
1061 if (Src.getReg() == MachineLocation::VirtualFP) {
1062 Asm->EmitInt8(DW_CFA_def_cfa_offset);
1063 Asm->EOL("DW_CFA_def_cfa_offset");
1065 Asm->EmitInt8(DW_CFA_def_cfa);
1066 Asm->EOL("DW_CFA_def_cfa");
1067 Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Src.getReg(), isEH));
1068 Asm->EOL("Register");
1071 int Offset = -Src.getOffset();
1073 Asm->EmitULEB128Bytes(Offset);
1076 assert(0 && "Machine move no supported yet.");
1078 } else if (Src.isReg() &&
1079 Src.getReg() == MachineLocation::VirtualFP) {
1081 Asm->EmitInt8(DW_CFA_def_cfa_register);
1082 Asm->EOL("DW_CFA_def_cfa_register");
1083 Asm->EmitULEB128Bytes(RI->getDwarfRegNum(Dst.getReg(), isEH));
1084 Asm->EOL("Register");
1086 assert(0 && "Machine move no supported yet.");
1089 unsigned Reg = RI->getDwarfRegNum(Src.getReg(), isEH);
1090 int Offset = Dst.getOffset() / stackGrowth;
1093 Asm->EmitInt8(DW_CFA_offset_extended_sf);
1094 Asm->EOL("DW_CFA_offset_extended_sf");
1095 Asm->EmitULEB128Bytes(Reg);
1097 Asm->EmitSLEB128Bytes(Offset);
1099 } else if (Reg < 64) {
1100 Asm->EmitInt8(DW_CFA_offset + Reg);
1102 Asm->EOL("DW_CFA_offset + Reg (" + utostr(Reg) + ")");
1105 Asm->EmitULEB128Bytes(Offset);
1108 Asm->EmitInt8(DW_CFA_offset_extended);
1109 Asm->EOL("DW_CFA_offset_extended");
1110 Asm->EmitULEB128Bytes(Reg);
1112 Asm->EmitULEB128Bytes(Offset);
1121 //===----------------------------------------------------------------------===//
1122 /// SrcLineInfo - This class is used to record source line correspondence.
1125 unsigned Line; // Source line number.
1126 unsigned Column; // Source column.
1127 unsigned SourceID; // Source ID number.
1128 unsigned LabelID; // Label in code ID number.
1130 SrcLineInfo(unsigned L, unsigned C, unsigned S, unsigned I)
1131 : Line(L), Column(C), SourceID(S), LabelID(I) {}
1134 unsigned getLine() const { return Line; }
1135 unsigned getColumn() const { return Column; }
1136 unsigned getSourceID() const { return SourceID; }
1137 unsigned getLabelID() const { return LabelID; }
1140 //===----------------------------------------------------------------------===//
1141 /// DbgVariable - This class is used to track local variable information.
1144 DIVariable Var; // Variable Descriptor.
1145 unsigned FrameIndex; // Variable frame index.
1147 DbgVariable(DIVariable V, unsigned I) : Var(V), FrameIndex(I) {}
1150 DIVariable getVariable() const { return Var; }
1151 unsigned getFrameIndex() const { return FrameIndex; }
1154 //===----------------------------------------------------------------------===//
1155 /// DbgScope - This class is used to track scope information.
1158 DbgScope *Parent; // Parent to this scope.
1159 DIDescriptor Desc; // Debug info descriptor for scope.
1160 // Either subprogram or block.
1161 unsigned StartLabelID; // Label ID of the beginning of scope.
1162 unsigned EndLabelID; // Label ID of the end of scope.
1163 SmallVector<DbgScope *, 4> Scopes; // Scopes defined in scope.
1164 SmallVector<DbgVariable *, 8> Variables;// Variables declared in scope.
1166 DbgScope(DbgScope *P, DIDescriptor D)
1167 : Parent(P), Desc(D), StartLabelID(0), EndLabelID(0), Scopes(), Variables()
1170 for (unsigned i = 0, N = Scopes.size(); i < N; ++i) delete Scopes[i];
1171 for (unsigned j = 0, M = Variables.size(); j < M; ++j) delete Variables[j];
1175 DbgScope *getParent() const { return Parent; }
1176 DIDescriptor getDesc() const { return Desc; }
1177 unsigned getStartLabelID() const { return StartLabelID; }
1178 unsigned getEndLabelID() const { return EndLabelID; }
1179 SmallVector<DbgScope *, 4> &getScopes() { return Scopes; }
1180 SmallVector<DbgVariable *, 8> &getVariables() { return Variables; }
1181 void setStartLabelID(unsigned S) { StartLabelID = S; }
1182 void setEndLabelID(unsigned E) { EndLabelID = E; }
1184 /// AddScope - Add a scope to the scope.
1186 void AddScope(DbgScope *S) { Scopes.push_back(S); }
1188 /// AddVariable - Add a variable to the scope.
1190 void AddVariable(DbgVariable *V) { Variables.push_back(V); }
1193 //===----------------------------------------------------------------------===//
1194 /// DwarfDebug - Emits Dwarf debug directives.
1196 class DwarfDebug : public Dwarf {
1197 //===--------------------------------------------------------------------===//
1198 // Attributes used to construct specific Dwarf sections.
1201 /// CompileUnitMap - A map of global variables representing compile units to
1203 DenseMap<Value *, CompileUnit *> CompileUnitMap;
1205 /// CompileUnits - All the compile units in this module.
1207 SmallVector<CompileUnit *, 8> CompileUnits;
1209 /// MainCU - Some platform prefers one compile unit per .o file. In such
1210 /// cases, all dies are inserted in MainCU.
1211 CompileUnit *MainCU;
1213 /// AbbreviationsSet - Used to uniquely define abbreviations.
1215 FoldingSet<DIEAbbrev> AbbreviationsSet;
1217 /// Abbreviations - A list of all the unique abbreviations in use.
1219 std::vector<DIEAbbrev *> Abbreviations;
1221 /// DirectoryIdMap - Directory name to directory id map.
1223 StringMap<unsigned> DirectoryIdMap;
1225 /// DirectoryNames - A list of directory names.
1226 SmallVector<std::string, 8> DirectoryNames;
1228 /// SourceFileIdMap - Source file name to source file id map.
1230 StringMap<unsigned> SourceFileIdMap;
1232 /// SourceFileNames - A list of source file names.
1233 SmallVector<std::string, 8> SourceFileNames;
1235 /// SourceIdMap - Source id map, i.e. pair of directory id and source file
1236 /// id mapped to a unique id.
1237 DenseMap<std::pair<unsigned, unsigned>, unsigned> SourceIdMap;
1239 /// SourceIds - Reverse map from source id to directory id + file id pair.
1241 SmallVector<std::pair<unsigned, unsigned>, 8> SourceIds;
1243 /// Lines - List of of source line correspondence.
1244 std::vector<SrcLineInfo> Lines;
1246 /// ValuesSet - Used to uniquely define values.
1248 FoldingSet<DIEValue> ValuesSet;
1250 /// Values - A list of all the unique values in use.
1252 std::vector<DIEValue *> Values;
1254 /// StringPool - A UniqueVector of strings used by indirect references.
1256 UniqueVector<std::string> StringPool;
1258 /// SectionMap - Provides a unique id per text section.
1260 UniqueVector<const Section*> SectionMap;
1262 /// SectionSourceLines - Tracks line numbers per text section.
1264 std::vector<std::vector<SrcLineInfo> > SectionSourceLines;
1266 /// didInitial - Flag to indicate if initial emission has been done.
1270 /// shouldEmit - Flag to indicate if debug information should be emitted.
1274 // RootDbgScope - Top level scope for the current function.
1276 DbgScope *RootDbgScope;
1278 // DbgScopeMap - Tracks the scopes in the current function.
1279 DenseMap<GlobalVariable *, DbgScope *> DbgScopeMap;
1281 struct FunctionDebugFrameInfo {
1283 std::vector<MachineMove> Moves;
1285 FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M):
1286 Number(Num), Moves(M) { }
1289 std::vector<FunctionDebugFrameInfo> DebugFrames;
1293 /// ShouldEmitDwarfDebug - Returns true if Dwarf debugging declarations should
1296 bool ShouldEmitDwarfDebug() const { return shouldEmit; }
1298 /// AssignAbbrevNumber - Define a unique number for the abbreviation.
1300 void AssignAbbrevNumber(DIEAbbrev &Abbrev) {
1301 // Profile the node so that we can make it unique.
1302 FoldingSetNodeID ID;
1305 // Check the set for priors.
1306 DIEAbbrev *InSet = AbbreviationsSet.GetOrInsertNode(&Abbrev);
1308 // If it's newly added.
1309 if (InSet == &Abbrev) {
1310 // Add to abbreviation list.
1311 Abbreviations.push_back(&Abbrev);
1312 // Assign the vector position + 1 as its number.
1313 Abbrev.setNumber(Abbreviations.size());
1315 // Assign existing abbreviation number.
1316 Abbrev.setNumber(InSet->getNumber());
1320 /// NewString - Add a string to the constant pool and returns a label.
1322 DWLabel NewString(const std::string &String) {
1323 unsigned StringID = StringPool.insert(String);
1324 return DWLabel("string", StringID);
1327 /// NewDIEntry - Creates a new DIEntry to be a proxy for a debug information
1329 DIEntry *NewDIEntry(DIE *Entry = NULL) {
1333 FoldingSetNodeID ID;
1334 DIEntry::Profile(ID, Entry);
1336 Value = static_cast<DIEntry *>(ValuesSet.FindNodeOrInsertPos(ID, Where));
1338 if (Value) return Value;
1340 Value = new DIEntry(Entry);
1341 ValuesSet.InsertNode(Value, Where);
1343 Value = new DIEntry(Entry);
1346 Values.push_back(Value);
1350 /// SetDIEntry - Set a DIEntry once the debug information entry is defined.
1352 void SetDIEntry(DIEntry *Value, DIE *Entry) {
1353 Value->Entry = Entry;
1354 // Add to values set if not already there. If it is, we merely have a
1355 // duplicate in the values list (no harm.)
1356 ValuesSet.GetOrInsertNode(Value);
1359 /// AddUInt - Add an unsigned integer attribute data and value.
1361 void AddUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer) {
1362 if (!Form) Form = DIEInteger::BestForm(false, Integer);
1364 FoldingSetNodeID ID;
1365 DIEInteger::Profile(ID, Integer);
1367 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1369 Value = new DIEInteger(Integer);
1370 ValuesSet.InsertNode(Value, Where);
1371 Values.push_back(Value);
1374 Die->AddValue(Attribute, Form, Value);
1377 /// AddSInt - Add an signed integer attribute data and value.
1379 void AddSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer) {
1380 if (!Form) Form = DIEInteger::BestForm(true, Integer);
1382 FoldingSetNodeID ID;
1383 DIEInteger::Profile(ID, (uint64_t)Integer);
1385 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1387 Value = new DIEInteger(Integer);
1388 ValuesSet.InsertNode(Value, Where);
1389 Values.push_back(Value);
1392 Die->AddValue(Attribute, Form, Value);
1395 /// AddString - Add a string attribute data and value.
1397 void AddString(DIE *Die, unsigned Attribute, unsigned Form,
1398 const std::string &String) {
1399 FoldingSetNodeID ID;
1400 DIEString::Profile(ID, String);
1402 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1404 Value = new DIEString(String);
1405 ValuesSet.InsertNode(Value, Where);
1406 Values.push_back(Value);
1409 Die->AddValue(Attribute, Form, Value);
1412 /// AddLabel - Add a Dwarf label attribute data and value.
1414 void AddLabel(DIE *Die, unsigned Attribute, unsigned Form,
1415 const DWLabel &Label) {
1416 FoldingSetNodeID ID;
1417 DIEDwarfLabel::Profile(ID, Label);
1419 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1421 Value = new DIEDwarfLabel(Label);
1422 ValuesSet.InsertNode(Value, Where);
1423 Values.push_back(Value);
1426 Die->AddValue(Attribute, Form, Value);
1429 /// AddObjectLabel - Add an non-Dwarf label attribute data and value.
1431 void AddObjectLabel(DIE *Die, unsigned Attribute, unsigned Form,
1432 const std::string &Label) {
1433 FoldingSetNodeID ID;
1434 DIEObjectLabel::Profile(ID, Label);
1436 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1438 Value = new DIEObjectLabel(Label);
1439 ValuesSet.InsertNode(Value, Where);
1440 Values.push_back(Value);
1443 Die->AddValue(Attribute, Form, Value);
1446 /// AddSectionOffset - Add a section offset label attribute data and value.
1448 void AddSectionOffset(DIE *Die, unsigned Attribute, unsigned Form,
1449 const DWLabel &Label, const DWLabel &Section,
1450 bool isEH = false, bool useSet = true) {
1451 FoldingSetNodeID ID;
1452 DIESectionOffset::Profile(ID, Label, Section);
1454 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1456 Value = new DIESectionOffset(Label, Section, isEH, useSet);
1457 ValuesSet.InsertNode(Value, Where);
1458 Values.push_back(Value);
1461 Die->AddValue(Attribute, Form, Value);
1464 /// AddDelta - Add a label delta attribute data and value.
1466 void AddDelta(DIE *Die, unsigned Attribute, unsigned Form,
1467 const DWLabel &Hi, const DWLabel &Lo) {
1468 FoldingSetNodeID ID;
1469 DIEDelta::Profile(ID, Hi, Lo);
1471 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1473 Value = new DIEDelta(Hi, Lo);
1474 ValuesSet.InsertNode(Value, Where);
1475 Values.push_back(Value);
1478 Die->AddValue(Attribute, Form, Value);
1481 /// AddDIEntry - Add a DIE attribute data and value.
1483 void AddDIEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry) {
1484 Die->AddValue(Attribute, Form, NewDIEntry(Entry));
1487 /// AddBlock - Add block data.
1489 void AddBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block) {
1490 Block->ComputeSize(*this);
1491 FoldingSetNodeID ID;
1494 DIEValue *Value = ValuesSet.FindNodeOrInsertPos(ID, Where);
1497 ValuesSet.InsertNode(Value, Where);
1498 Values.push_back(Value);
1500 // Already exists, reuse the previous one.
1502 Block = cast<DIEBlock>(Value);
1505 Die->AddValue(Attribute, Block->BestForm(), Value);
1510 /// AddSourceLine - Add location information to specified debug information
1512 void AddSourceLine(DIE *Die, const DIVariable *V) {
1513 unsigned FileID = 0;
1514 unsigned Line = V->getLineNumber();
1515 CompileUnit *Unit = FindCompileUnit(V->getCompileUnit());
1516 FileID = Unit->getID();
1517 assert (FileID && "Invalid file id");
1518 AddUInt(Die, DW_AT_decl_file, 0, FileID);
1519 AddUInt(Die, DW_AT_decl_line, 0, Line);
1522 /// AddSourceLine - Add location information to specified debug information
1524 void AddSourceLine(DIE *Die, const DIGlobal *G) {
1525 unsigned FileID = 0;
1526 unsigned Line = G->getLineNumber();
1527 CompileUnit *Unit = FindCompileUnit(G->getCompileUnit());
1528 FileID = Unit->getID();
1529 assert (FileID && "Invalid file id");
1530 AddUInt(Die, DW_AT_decl_file, 0, FileID);
1531 AddUInt(Die, DW_AT_decl_line, 0, Line);
1534 void AddSourceLine(DIE *Die, const DIType *Ty) {
1535 unsigned FileID = 0;
1536 unsigned Line = Ty->getLineNumber();
1537 DICompileUnit CU = Ty->getCompileUnit();
1540 CompileUnit *Unit = FindCompileUnit(CU);
1541 FileID = Unit->getID();
1542 assert (FileID && "Invalid file id");
1543 AddUInt(Die, DW_AT_decl_file, 0, FileID);
1544 AddUInt(Die, DW_AT_decl_line, 0, Line);
1547 /// AddAddress - Add an address attribute to a die based on the location
1549 void AddAddress(DIE *Die, unsigned Attribute,
1550 const MachineLocation &Location) {
1551 unsigned Reg = RI->getDwarfRegNum(Location.getReg(), false);
1552 DIEBlock *Block = new DIEBlock();
1554 if (Location.isReg()) {
1556 AddUInt(Block, 0, DW_FORM_data1, DW_OP_reg0 + Reg);
1558 AddUInt(Block, 0, DW_FORM_data1, DW_OP_regx);
1559 AddUInt(Block, 0, DW_FORM_udata, Reg);
1563 AddUInt(Block, 0, DW_FORM_data1, DW_OP_breg0 + Reg);
1565 AddUInt(Block, 0, DW_FORM_data1, DW_OP_bregx);
1566 AddUInt(Block, 0, DW_FORM_udata, Reg);
1568 AddUInt(Block, 0, DW_FORM_sdata, Location.getOffset());
1571 AddBlock(Die, Attribute, 0, Block);
1574 /// AddType - Add a new type attribute to the specified entity.
1575 void AddType(CompileUnit *DW_Unit, DIE *Entity, DIType Ty) {
1579 // Check for pre-existence.
1580 DIEntry *&Slot = DW_Unit->getDIEntrySlotFor(Ty.getGV());
1581 // If it exists then use the existing value.
1583 Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
1588 Slot = NewDIEntry();
1591 DIE Buffer(DW_TAG_base_type);
1592 if (Ty.isBasicType(Ty.getTag()))
1593 ConstructTypeDIE(DW_Unit, Buffer, DIBasicType(Ty.getGV()));
1594 else if (Ty.isDerivedType(Ty.getTag()))
1595 ConstructTypeDIE(DW_Unit, Buffer, DIDerivedType(Ty.getGV()));
1597 assert(Ty.isCompositeType(Ty.getTag()) && "Unknown kind of DIType");
1598 ConstructTypeDIE(DW_Unit, Buffer, DICompositeType(Ty.getGV()));
1601 // Add debug information entry to entity and appropriate context.
1603 DIDescriptor Context = Ty.getContext();
1604 if (!Context.isNull())
1605 Die = DW_Unit->getDieMapSlotFor(Context.getGV());
1608 DIE *Child = new DIE(Buffer);
1609 Die->AddChild(Child);
1611 SetDIEntry(Slot, Child);
1613 Die = DW_Unit->AddDie(Buffer);
1614 SetDIEntry(Slot, Die);
1617 Entity->AddValue(DW_AT_type, DW_FORM_ref4, Slot);
1620 /// ConstructTypeDIE - Construct basic type die from DIBasicType.
1621 void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
1624 // Get core information.
1627 Buffer.setTag(DW_TAG_base_type);
1628 AddUInt(&Buffer, DW_AT_encoding, DW_FORM_data1, BTy.getEncoding());
1629 // Add name if not anonymous or intermediate type.
1631 AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
1632 uint64_t Size = BTy.getSizeInBits() >> 3;
1633 AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
1636 /// ConstructTypeDIE - Construct derived type die from DIDerivedType.
1637 void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
1638 DIDerivedType DTy) {
1640 // Get core information.
1643 uint64_t Size = DTy.getSizeInBits() >> 3;
1644 unsigned Tag = DTy.getTag();
1646 // FIXME - Workaround for templates.
1647 if (Tag == DW_TAG_inheritance) Tag = DW_TAG_reference_type;
1651 // Map to main type, void will not have a type.
1652 DIType FromTy = DTy.getTypeDerivedFrom();
1653 AddType(DW_Unit, &Buffer, FromTy);
1655 // Add name if not anonymous or intermediate type.
1657 AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
1659 // Add size if non-zero (derived types might be zero-sized.)
1661 AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
1663 // Add source line info if available and TyDesc is not a forward
1665 if (!DTy.isForwardDecl())
1666 AddSourceLine(&Buffer, &DTy);
1669 /// ConstructTypeDIE - Construct type DIE from DICompositeType.
1670 void ConstructTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
1671 DICompositeType CTy) {
1672 // Get core information.
1676 uint64_t Size = CTy.getSizeInBits() >> 3;
1677 unsigned Tag = CTy.getTag();
1681 case DW_TAG_vector_type:
1682 case DW_TAG_array_type:
1683 ConstructArrayTypeDIE(DW_Unit, Buffer, &CTy);
1685 case DW_TAG_enumeration_type:
1687 DIArray Elements = CTy.getTypeArray();
1688 // Add enumerators to enumeration type.
1689 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1690 DIE *ElemDie = NULL;
1691 DIEnumerator Enum(Elements.getElement(i).getGV());
1692 ElemDie = ConstructEnumTypeDIE(DW_Unit, &Enum);
1693 Buffer.AddChild(ElemDie);
1697 case DW_TAG_subroutine_type:
1699 // Add prototype flag.
1700 AddUInt(&Buffer, DW_AT_prototyped, DW_FORM_flag, 1);
1701 DIArray Elements = CTy.getTypeArray();
1703 DIDescriptor RTy = Elements.getElement(0);
1704 AddType(DW_Unit, &Buffer, DIType(RTy.getGV()));
1707 for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
1708 DIE *Arg = new DIE(DW_TAG_formal_parameter);
1709 DIDescriptor Ty = Elements.getElement(i);
1710 AddType(DW_Unit, Arg, DIType(Ty.getGV()));
1711 Buffer.AddChild(Arg);
1715 case DW_TAG_structure_type:
1716 case DW_TAG_union_type:
1718 // Add elements to structure type.
1719 DIArray Elements = CTy.getTypeArray();
1721 // A forward struct declared type may not have elements available.
1722 if (Elements.isNull())
1725 // Add elements to structure type.
1726 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1727 DIDescriptor Element = Elements.getElement(i);
1728 DIE *ElemDie = NULL;
1729 if (Element.getTag() == dwarf::DW_TAG_subprogram)
1730 ElemDie = CreateSubprogramDIE(DW_Unit,
1731 DISubprogram(Element.getGV()));
1732 else if (Element.getTag() == dwarf::DW_TAG_variable) // ???
1733 ElemDie = CreateGlobalVariableDIE(DW_Unit,
1734 DIGlobalVariable(Element.getGV()));
1736 ElemDie = CreateMemberDIE(DW_Unit,
1737 DIDerivedType(Element.getGV()));
1738 Buffer.AddChild(ElemDie);
1740 unsigned RLang = CTy.getRunTimeLang();
1742 AddUInt(&Buffer, DW_AT_APPLE_runtime_class, DW_FORM_data1, RLang);
1749 // Add name if not anonymous or intermediate type.
1751 AddString(&Buffer, DW_AT_name, DW_FORM_string, Name);
1753 if (Tag == DW_TAG_enumeration_type || Tag == DW_TAG_structure_type
1754 || Tag == DW_TAG_union_type) {
1755 // Add size if non-zero (derived types might be zero-sized.)
1757 AddUInt(&Buffer, DW_AT_byte_size, 0, Size);
1759 // Add zero size if it is not a forward declaration.
1760 if (CTy.isForwardDecl())
1761 AddUInt(&Buffer, DW_AT_declaration, DW_FORM_flag, 1);
1763 AddUInt(&Buffer, DW_AT_byte_size, 0, 0);
1766 // Add source line info if available.
1767 if (!CTy.isForwardDecl())
1768 AddSourceLine(&Buffer, &CTy);
1772 /// ConstructSubrangeDIE - Construct subrange DIE from DISubrange.
1773 void ConstructSubrangeDIE(DIE &Buffer, DISubrange SR, DIE *IndexTy) {
1774 int64_t L = SR.getLo();
1775 int64_t H = SR.getHi();
1776 DIE *DW_Subrange = new DIE(DW_TAG_subrange_type);
1778 AddDIEntry(DW_Subrange, DW_AT_type, DW_FORM_ref4, IndexTy);
1780 AddSInt(DW_Subrange, DW_AT_lower_bound, 0, L);
1781 AddSInt(DW_Subrange, DW_AT_upper_bound, 0, H);
1783 Buffer.AddChild(DW_Subrange);
1786 /// ConstructArrayTypeDIE - Construct array type DIE from DICompositeType.
1787 void ConstructArrayTypeDIE(CompileUnit *DW_Unit, DIE &Buffer,
1788 DICompositeType *CTy) {
1789 Buffer.setTag(DW_TAG_array_type);
1790 if (CTy->getTag() == DW_TAG_vector_type)
1791 AddUInt(&Buffer, DW_AT_GNU_vector, DW_FORM_flag, 1);
1793 // Emit derived type.
1794 AddType(DW_Unit, &Buffer, CTy->getTypeDerivedFrom());
1795 DIArray Elements = CTy->getTypeArray();
1797 // Construct an anonymous type for index type.
1798 DIE IdxBuffer(DW_TAG_base_type);
1799 AddUInt(&IdxBuffer, DW_AT_byte_size, 0, sizeof(int32_t));
1800 AddUInt(&IdxBuffer, DW_AT_encoding, DW_FORM_data1, DW_ATE_signed);
1801 DIE *IndexTy = DW_Unit->AddDie(IdxBuffer);
1803 // Add subranges to array type.
1804 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1805 DIDescriptor Element = Elements.getElement(i);
1806 if (Element.getTag() == dwarf::DW_TAG_subrange_type)
1807 ConstructSubrangeDIE(Buffer, DISubrange(Element.getGV()), IndexTy);
1811 /// ConstructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
1812 DIE *ConstructEnumTypeDIE(CompileUnit *DW_Unit, DIEnumerator *ETy) {
1814 DIE *Enumerator = new DIE(DW_TAG_enumerator);
1817 AddString(Enumerator, DW_AT_name, DW_FORM_string, Name);
1818 int64_t Value = ETy->getEnumValue();
1819 AddSInt(Enumerator, DW_AT_const_value, DW_FORM_sdata, Value);
1823 /// CreateGlobalVariableDIE - Create new DIE using GV.
1824 DIE *CreateGlobalVariableDIE(CompileUnit *DW_Unit, const DIGlobalVariable &GV)
1826 DIE *GVDie = new DIE(DW_TAG_variable);
1828 GV.getDisplayName(Name);
1829 AddString(GVDie, DW_AT_name, DW_FORM_string, Name);
1830 std::string LinkageName;
1831 GV.getLinkageName(LinkageName);
1832 if (!LinkageName.empty())
1833 AddString(GVDie, DW_AT_MIPS_linkage_name, DW_FORM_string, LinkageName);
1834 AddType(DW_Unit, GVDie, GV.getType());
1835 if (!GV.isLocalToUnit())
1836 AddUInt(GVDie, DW_AT_external, DW_FORM_flag, 1);
1837 AddSourceLine(GVDie, &GV);
1841 /// CreateMemberDIE - Create new member DIE.
1842 DIE *CreateMemberDIE(CompileUnit *DW_Unit, const DIDerivedType &DT) {
1843 DIE *MemberDie = new DIE(DT.getTag());
1847 AddString(MemberDie, DW_AT_name, DW_FORM_string, Name);
1849 AddType(DW_Unit, MemberDie, DT.getTypeDerivedFrom());
1851 AddSourceLine(MemberDie, &DT);
1853 uint64_t Size = DT.getSizeInBits();
1854 uint64_t FieldSize = DT.getOriginalTypeSize();
1856 if (Size != FieldSize) {
1858 AddUInt(MemberDie, DW_AT_byte_size, 0, DT.getOriginalTypeSize() >> 3);
1859 AddUInt(MemberDie, DW_AT_bit_size, 0, DT.getSizeInBits());
1861 uint64_t Offset = DT.getOffsetInBits();
1862 uint64_t FieldOffset = Offset;
1863 uint64_t AlignMask = ~(DT.getAlignInBits() - 1);
1864 uint64_t HiMark = (Offset + FieldSize) & AlignMask;
1865 FieldOffset = (HiMark - FieldSize);
1866 Offset -= FieldOffset;
1867 // Maybe we need to work from the other end.
1868 if (TD->isLittleEndian()) Offset = FieldSize - (Offset + Size);
1869 AddUInt(MemberDie, DW_AT_bit_offset, 0, Offset);
1871 DIEBlock *Block = new DIEBlock();
1872 AddUInt(Block, 0, DW_FORM_data1, DW_OP_plus_uconst);
1873 AddUInt(Block, 0, DW_FORM_udata, DT.getOffsetInBits() >> 3);
1874 AddBlock(MemberDie, DW_AT_data_member_location, 0, Block);
1876 if (DT.isProtected())
1877 AddUInt(MemberDie, DW_AT_accessibility, 0, DW_ACCESS_protected);
1878 else if (DT.isPrivate())
1879 AddUInt(MemberDie, DW_AT_accessibility, 0, DW_ACCESS_private);
1884 /// CreateSubprogramDIE - Create new DIE using SP.
1885 DIE *CreateSubprogramDIE(CompileUnit *DW_Unit,
1886 const DISubprogram &SP,
1887 bool IsConstructor = false) {
1888 DIE *SPDie = new DIE(DW_TAG_subprogram);
1891 AddString(SPDie, DW_AT_name, DW_FORM_string, Name);
1892 std::string LinkageName;
1893 SP.getLinkageName(LinkageName);
1894 if (!LinkageName.empty())
1895 AddString(SPDie, DW_AT_MIPS_linkage_name, DW_FORM_string,
1897 AddSourceLine(SPDie, &SP);
1899 DICompositeType SPTy = SP.getType();
1900 DIArray Args = SPTy.getTypeArray();
1903 if (!IsConstructor) {
1905 AddType(DW_Unit, SPDie, SPTy);
1907 AddType(DW_Unit, SPDie, DIType(Args.getElement(0).getGV()));
1910 if (!SP.isDefinition()) {
1911 AddUInt(SPDie, DW_AT_declaration, DW_FORM_flag, 1);
1913 // Do not add arguments for subprogram definition. They will be
1914 // handled through RecordVariable.
1916 for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
1917 DIE *Arg = new DIE(DW_TAG_formal_parameter);
1918 AddType(DW_Unit, Arg, DIType(Args.getElement(i).getGV()));
1919 AddUInt(Arg, DW_AT_artificial, DW_FORM_flag, 1); // ???
1920 SPDie->AddChild(Arg);
1924 unsigned Lang = SP.getCompileUnit().getLanguage();
1925 if (Lang == DW_LANG_C99 || Lang == DW_LANG_C89
1926 || Lang == DW_LANG_ObjC)
1927 AddUInt(SPDie, DW_AT_prototyped, DW_FORM_flag, 1);
1929 if (!SP.isLocalToUnit())
1930 AddUInt(SPDie, DW_AT_external, DW_FORM_flag, 1);
1934 /// FindCompileUnit - Get the compile unit for the given descriptor.
1936 CompileUnit *FindCompileUnit(DICompileUnit Unit) {
1937 CompileUnit *DW_Unit = CompileUnitMap[Unit.getGV()];
1938 assert(DW_Unit && "Missing compile unit.");
1942 /// NewDbgScopeVariable - Create a new scope variable.
1944 DIE *NewDbgScopeVariable(DbgVariable *DV, CompileUnit *Unit) {
1945 // Get the descriptor.
1946 const DIVariable &VD = DV->getVariable();
1948 // Translate tag to proper Dwarf tag. The result variable is dropped for
1951 switch (VD.getTag()) {
1952 case DW_TAG_return_variable: return NULL;
1953 case DW_TAG_arg_variable: Tag = DW_TAG_formal_parameter; break;
1954 case DW_TAG_auto_variable: // fall thru
1955 default: Tag = DW_TAG_variable; break;
1958 // Define variable debug information entry.
1959 DIE *VariableDie = new DIE(Tag);
1962 AddString(VariableDie, DW_AT_name, DW_FORM_string, Name);
1964 // Add source line info if available.
1965 AddSourceLine(VariableDie, &VD);
1967 // Add variable type.
1968 AddType(Unit, VariableDie, VD.getType());
1970 // Add variable address.
1971 MachineLocation Location;
1972 Location.set(RI->getFrameRegister(*MF),
1973 RI->getFrameIndexOffset(*MF, DV->getFrameIndex()));
1974 AddAddress(VariableDie, DW_AT_location, Location);
1979 /// getOrCreateScope - Returns the scope associated with the given descriptor.
1981 DbgScope *getOrCreateScope(GlobalVariable *V) {
1982 DbgScope *&Slot = DbgScopeMap[V];
1983 if (Slot) return Slot;
1985 // FIXME - breaks down when the context is an inlined function.
1986 DIDescriptor ParentDesc;
1987 DIDescriptor Desc(V);
1989 if (Desc.getTag() == dwarf::DW_TAG_lexical_block) {
1991 ParentDesc = Block.getContext();
1994 DbgScope *Parent = ParentDesc.isNull() ?
1995 NULL : getOrCreateScope(ParentDesc.getGV());
1996 Slot = new DbgScope(Parent, Desc);
1999 Parent->AddScope(Slot);
2000 } else if (RootDbgScope) {
2001 // FIXME - Add inlined function scopes to the root so we can delete them
2002 // later. Long term, handle inlined functions properly.
2003 RootDbgScope->AddScope(Slot);
2005 // First function is top level function.
2006 RootDbgScope = Slot;
2012 /// ConstructDbgScope - Construct the components of a scope.
2014 void ConstructDbgScope(DbgScope *ParentScope,
2015 unsigned ParentStartID, unsigned ParentEndID,
2016 DIE *ParentDie, CompileUnit *Unit) {
2017 // Add variables to scope.
2018 SmallVector<DbgVariable *, 8> &Variables = ParentScope->getVariables();
2019 for (unsigned i = 0, N = Variables.size(); i < N; ++i) {
2020 DIE *VariableDie = NewDbgScopeVariable(Variables[i], Unit);
2021 if (VariableDie) ParentDie->AddChild(VariableDie);
2024 // Add nested scopes.
2025 SmallVector<DbgScope *, 4> &Scopes = ParentScope->getScopes();
2026 for (unsigned j = 0, M = Scopes.size(); j < M; ++j) {
2027 // Define the Scope debug information entry.
2028 DbgScope *Scope = Scopes[j];
2029 // FIXME - Ignore inlined functions for the time being.
2030 if (!Scope->getParent()) continue;
2032 unsigned StartID = MMI->MappedLabel(Scope->getStartLabelID());
2033 unsigned EndID = MMI->MappedLabel(Scope->getEndLabelID());
2035 // Ignore empty scopes.
2036 if (StartID == EndID && StartID != 0) continue;
2037 if (Scope->getScopes().empty() && Scope->getVariables().empty()) continue;
2039 if (StartID == ParentStartID && EndID == ParentEndID) {
2040 // Just add stuff to the parent scope.
2041 ConstructDbgScope(Scope, ParentStartID, ParentEndID, ParentDie, Unit);
2043 DIE *ScopeDie = new DIE(DW_TAG_lexical_block);
2045 // Add the scope bounds.
2047 AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
2048 DWLabel("label", StartID));
2050 AddLabel(ScopeDie, DW_AT_low_pc, DW_FORM_addr,
2051 DWLabel("func_begin", SubprogramCount));
2054 AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
2055 DWLabel("label", EndID));
2057 AddLabel(ScopeDie, DW_AT_high_pc, DW_FORM_addr,
2058 DWLabel("func_end", SubprogramCount));
2061 // Add the scope contents.
2062 ConstructDbgScope(Scope, StartID, EndID, ScopeDie, Unit);
2063 ParentDie->AddChild(ScopeDie);
2068 /// ConstructRootDbgScope - Construct the scope for the subprogram.
2070 void ConstructRootDbgScope(DbgScope *RootScope) {
2071 // Exit if there is no root scope.
2072 if (!RootScope) return;
2073 DIDescriptor Desc = RootScope->getDesc();
2077 // Get the subprogram debug information entry.
2078 DISubprogram SPD(Desc.getGV());
2080 // Get the compile unit context.
2081 CompileUnit *Unit = MainCU;
2083 Unit = FindCompileUnit(SPD.getCompileUnit());
2085 // Get the subprogram die.
2086 DIE *SPDie = Unit->getDieMapSlotFor(SPD.getGV());
2087 assert(SPDie && "Missing subprogram descriptor");
2089 // Add the function bounds.
2090 AddLabel(SPDie, DW_AT_low_pc, DW_FORM_addr,
2091 DWLabel("func_begin", SubprogramCount));
2092 AddLabel(SPDie, DW_AT_high_pc, DW_FORM_addr,
2093 DWLabel("func_end", SubprogramCount));
2094 MachineLocation Location(RI->getFrameRegister(*MF));
2095 AddAddress(SPDie, DW_AT_frame_base, Location);
2097 ConstructDbgScope(RootScope, 0, 0, SPDie, Unit);
2100 /// ConstructDefaultDbgScope - Construct a default scope for the subprogram.
2102 void ConstructDefaultDbgScope(MachineFunction *MF) {
2103 const char *FnName = MF->getFunction()->getNameStart();
2105 std::map<std::string, DIE*> &Globals = MainCU->getGlobals();
2106 std::map<std::string, DIE*>::iterator GI = Globals.find(FnName);
2107 if (GI != Globals.end()) {
2108 DIE *SPDie = GI->second;
2110 // Add the function bounds.
2111 AddLabel(SPDie, DW_AT_low_pc, DW_FORM_addr,
2112 DWLabel("func_begin", SubprogramCount));
2113 AddLabel(SPDie, DW_AT_high_pc, DW_FORM_addr,
2114 DWLabel("func_end", SubprogramCount));
2116 MachineLocation Location(RI->getFrameRegister(*MF));
2117 AddAddress(SPDie, DW_AT_frame_base, Location);
2121 for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i) {
2122 CompileUnit *Unit = CompileUnits[i];
2123 std::map<std::string, DIE*> &Globals = Unit->getGlobals();
2124 std::map<std::string, DIE*>::iterator GI = Globals.find(FnName);
2125 if (GI != Globals.end()) {
2126 DIE *SPDie = GI->second;
2128 // Add the function bounds.
2129 AddLabel(SPDie, DW_AT_low_pc, DW_FORM_addr,
2130 DWLabel("func_begin", SubprogramCount));
2131 AddLabel(SPDie, DW_AT_high_pc, DW_FORM_addr,
2132 DWLabel("func_end", SubprogramCount));
2134 MachineLocation Location(RI->getFrameRegister(*MF));
2135 AddAddress(SPDie, DW_AT_frame_base, Location);
2142 // FIXME: This is causing an abort because C++ mangled names are compared
2143 // with their unmangled counterparts. See PR2885. Don't do this assert.
2144 assert(0 && "Couldn't find DIE for machine function!");
2149 /// EmitInitial - Emit initial Dwarf declarations. This is necessary for cc
2150 /// tools to recognize the object file contains Dwarf information.
2151 void EmitInitial() {
2152 // Check to see if we already emitted intial headers.
2153 if (didInitial) return;
2156 // Dwarf sections base addresses.
2157 if (TAI->doesDwarfRequireFrameSection()) {
2158 Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
2159 EmitLabel("section_debug_frame", 0);
2161 Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
2162 EmitLabel("section_info", 0);
2163 Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
2164 EmitLabel("section_abbrev", 0);
2165 Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
2166 EmitLabel("section_aranges", 0);
2167 if (TAI->doesSupportMacInfoSection()) {
2168 Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
2169 EmitLabel("section_macinfo", 0);
2171 Asm->SwitchToDataSection(TAI->getDwarfLineSection());
2172 EmitLabel("section_line", 0);
2173 Asm->SwitchToDataSection(TAI->getDwarfLocSection());
2174 EmitLabel("section_loc", 0);
2175 Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
2176 EmitLabel("section_pubnames", 0);
2177 Asm->SwitchToDataSection(TAI->getDwarfStrSection());
2178 EmitLabel("section_str", 0);
2179 Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
2180 EmitLabel("section_ranges", 0);
2182 Asm->SwitchToSection(TAI->getTextSection());
2183 EmitLabel("text_begin", 0);
2184 Asm->SwitchToSection(TAI->getDataSection());
2185 EmitLabel("data_begin", 0);
2188 /// EmitDIE - Recusively Emits a debug information entry.
2190 void EmitDIE(DIE *Die) {
2191 // Get the abbreviation for this DIE.
2192 unsigned AbbrevNumber = Die->getAbbrevNumber();
2193 const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
2197 // Emit the code (index) for the abbreviation.
2198 Asm->EmitULEB128Bytes(AbbrevNumber);
2201 Asm->EOL(std::string("Abbrev [" +
2202 utostr(AbbrevNumber) +
2203 "] 0x" + utohexstr(Die->getOffset()) +
2204 ":0x" + utohexstr(Die->getSize()) + " " +
2205 TagString(Abbrev->getTag())));
2209 SmallVector<DIEValue*, 32> &Values = Die->getValues();
2210 const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
2212 // Emit the DIE attribute values.
2213 for (unsigned i = 0, N = Values.size(); i < N; ++i) {
2214 unsigned Attr = AbbrevData[i].getAttribute();
2215 unsigned Form = AbbrevData[i].getForm();
2216 assert(Form && "Too many attributes for DIE (check abbreviation)");
2219 case DW_AT_sibling: {
2220 Asm->EmitInt32(Die->SiblingOffset());
2224 // Emit an attribute using the defined form.
2225 Values[i]->EmitValue(*this, Form);
2230 Asm->EOL(AttributeString(Attr));
2233 // Emit the DIE children if any.
2234 if (Abbrev->getChildrenFlag() == DW_CHILDREN_yes) {
2235 const std::vector<DIE *> &Children = Die->getChildren();
2237 for (unsigned j = 0, M = Children.size(); j < M; ++j) {
2238 EmitDIE(Children[j]);
2241 Asm->EmitInt8(0); Asm->EOL("End Of Children Mark");
2245 /// SizeAndOffsetDie - Compute the size and offset of a DIE.
2247 unsigned SizeAndOffsetDie(DIE *Die, unsigned Offset, bool Last) {
2248 // Get the children.
2249 const std::vector<DIE *> &Children = Die->getChildren();
2251 // If not last sibling and has children then add sibling offset attribute.
2252 if (!Last && !Children.empty()) Die->AddSiblingOffset();
2254 // Record the abbreviation.
2255 AssignAbbrevNumber(Die->getAbbrev());
2257 // Get the abbreviation for this DIE.
2258 unsigned AbbrevNumber = Die->getAbbrevNumber();
2259 const DIEAbbrev *Abbrev = Abbreviations[AbbrevNumber - 1];
2262 Die->setOffset(Offset);
2264 // Start the size with the size of abbreviation code.
2265 Offset += TargetAsmInfo::getULEB128Size(AbbrevNumber);
2267 const SmallVector<DIEValue*, 32> &Values = Die->getValues();
2268 const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev->getData();
2270 // Size the DIE attribute values.
2271 for (unsigned i = 0, N = Values.size(); i < N; ++i) {
2272 // Size attribute value.
2273 Offset += Values[i]->SizeOf(*this, AbbrevData[i].getForm());
2276 // Size the DIE children if any.
2277 if (!Children.empty()) {
2278 assert(Abbrev->getChildrenFlag() == DW_CHILDREN_yes &&
2279 "Children flag not set");
2281 for (unsigned j = 0, M = Children.size(); j < M; ++j) {
2282 Offset = SizeAndOffsetDie(Children[j], Offset, (j + 1) == M);
2285 // End of children marker.
2286 Offset += sizeof(int8_t);
2289 Die->setSize(Offset - Die->getOffset());
2293 /// SizeAndOffsets - Compute the size and offset of all the DIEs.
2295 void SizeAndOffsets() {
2296 // Process base compile unit.
2298 // Compute size of compile unit header
2299 unsigned Offset = sizeof(int32_t) + // Length of Compilation Unit Info
2300 sizeof(int16_t) + // DWARF version number
2301 sizeof(int32_t) + // Offset Into Abbrev. Section
2302 sizeof(int8_t); // Pointer Size (in bytes)
2303 SizeAndOffsetDie(MainCU->getDie(), Offset, true);
2306 for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i) {
2307 CompileUnit *Unit = CompileUnits[i];
2308 // Compute size of compile unit header
2309 unsigned Offset = sizeof(int32_t) + // Length of Compilation Unit Info
2310 sizeof(int16_t) + // DWARF version number
2311 sizeof(int32_t) + // Offset Into Abbrev. Section
2312 sizeof(int8_t); // Pointer Size (in bytes)
2313 SizeAndOffsetDie(Unit->getDie(), Offset, true);
2317 /// EmitDebugInfo / EmitDebugInfoPerCU - Emit the debug info section.
2319 void EmitDebugInfoPerCU(CompileUnit *Unit) {
2320 DIE *Die = Unit->getDie();
2321 // Emit the compile units header.
2322 EmitLabel("info_begin", Unit->getID());
2323 // Emit size of content not including length itself
2324 unsigned ContentSize = Die->getSize() +
2325 sizeof(int16_t) + // DWARF version number
2326 sizeof(int32_t) + // Offset Into Abbrev. Section
2327 sizeof(int8_t) + // Pointer Size (in bytes)
2328 sizeof(int32_t); // FIXME - extra pad for gdb bug.
2330 Asm->EmitInt32(ContentSize); Asm->EOL("Length of Compilation Unit Info");
2331 Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
2332 EmitSectionOffset("abbrev_begin", "section_abbrev", 0, 0, true, false);
2333 Asm->EOL("Offset Into Abbrev. Section");
2334 Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Address Size (in bytes)");
2337 // FIXME - extra padding for gdb bug.
2338 Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
2339 Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
2340 Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
2341 Asm->EmitInt8(0); Asm->EOL("Extra Pad For GDB");
2342 EmitLabel("info_end", Unit->getID());
2347 void EmitDebugInfo() {
2348 // Start debug info section.
2349 Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
2352 EmitDebugInfoPerCU(MainCU);
2356 for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i)
2357 EmitDebugInfoPerCU(CompileUnits[i]);
2360 /// EmitAbbreviations - Emit the abbreviation section.
2362 void EmitAbbreviations() const {
2363 // Check to see if it is worth the effort.
2364 if (!Abbreviations.empty()) {
2365 // Start the debug abbrev section.
2366 Asm->SwitchToDataSection(TAI->getDwarfAbbrevSection());
2368 EmitLabel("abbrev_begin", 0);
2370 // For each abbrevation.
2371 for (unsigned i = 0, N = Abbreviations.size(); i < N; ++i) {
2372 // Get abbreviation data
2373 const DIEAbbrev *Abbrev = Abbreviations[i];
2375 // Emit the abbrevations code (base 1 index.)
2376 Asm->EmitULEB128Bytes(Abbrev->getNumber());
2377 Asm->EOL("Abbreviation Code");
2379 // Emit the abbreviations data.
2380 Abbrev->Emit(*this);
2385 // Mark end of abbreviations.
2386 Asm->EmitULEB128Bytes(0); Asm->EOL("EOM(3)");
2388 EmitLabel("abbrev_end", 0);
2394 /// EmitEndOfLineMatrix - Emit the last address of the section and the end of
2395 /// the line matrix.
2397 void EmitEndOfLineMatrix(unsigned SectionEnd) {
2398 // Define last address of section.
2399 Asm->EmitInt8(0); Asm->EOL("Extended Op");
2400 Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
2401 Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
2402 EmitReference("section_end", SectionEnd); Asm->EOL("Section end label");
2404 // Mark end of matrix.
2405 Asm->EmitInt8(0); Asm->EOL("DW_LNE_end_sequence");
2406 Asm->EmitULEB128Bytes(1); Asm->EOL();
2407 Asm->EmitInt8(1); Asm->EOL();
2410 /// EmitDebugLines - Emit source line information.
2412 void EmitDebugLines() {
2413 // If the target is using .loc/.file, the assembler will be emitting the
2414 // .debug_line table automatically.
2415 if (TAI->hasDotLocAndDotFile())
2418 // Minimum line delta, thus ranging from -10..(255-10).
2419 const int MinLineDelta = -(DW_LNS_fixed_advance_pc + 1);
2420 // Maximum line delta, thus ranging from -10..(255-10).
2421 const int MaxLineDelta = 255 + MinLineDelta;
2423 // Start the dwarf line section.
2424 Asm->SwitchToDataSection(TAI->getDwarfLineSection());
2426 // Construct the section header.
2428 EmitDifference("line_end", 0, "line_begin", 0, true);
2429 Asm->EOL("Length of Source Line Info");
2430 EmitLabel("line_begin", 0);
2432 Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF version number");
2434 EmitDifference("line_prolog_end", 0, "line_prolog_begin", 0, true);
2435 Asm->EOL("Prolog Length");
2436 EmitLabel("line_prolog_begin", 0);
2438 Asm->EmitInt8(1); Asm->EOL("Minimum Instruction Length");
2440 Asm->EmitInt8(1); Asm->EOL("Default is_stmt_start flag");
2442 Asm->EmitInt8(MinLineDelta); Asm->EOL("Line Base Value (Special Opcodes)");
2444 Asm->EmitInt8(MaxLineDelta); Asm->EOL("Line Range Value (Special Opcodes)");
2446 Asm->EmitInt8(-MinLineDelta); Asm->EOL("Special Opcode Base");
2448 // Line number standard opcode encodings argument count
2449 Asm->EmitInt8(0); Asm->EOL("DW_LNS_copy arg count");
2450 Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_pc arg count");
2451 Asm->EmitInt8(1); Asm->EOL("DW_LNS_advance_line arg count");
2452 Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_file arg count");
2453 Asm->EmitInt8(1); Asm->EOL("DW_LNS_set_column arg count");
2454 Asm->EmitInt8(0); Asm->EOL("DW_LNS_negate_stmt arg count");
2455 Asm->EmitInt8(0); Asm->EOL("DW_LNS_set_basic_block arg count");
2456 Asm->EmitInt8(0); Asm->EOL("DW_LNS_const_add_pc arg count");
2457 Asm->EmitInt8(1); Asm->EOL("DW_LNS_fixed_advance_pc arg count");
2459 // Emit directories.
2460 for (unsigned DI = 1, DE = getNumSourceDirectories()+1; DI != DE; ++DI) {
2461 Asm->EmitString(getSourceDirectoryName(DI));
2462 Asm->EOL("Directory");
2464 Asm->EmitInt8(0); Asm->EOL("End of directories");
2467 for (unsigned SI = 1, SE = getNumSourceIds()+1; SI != SE; ++SI) {
2468 // Remember source id starts at 1.
2469 std::pair<unsigned, unsigned> Id = getSourceDirsectoryAndFileIds(SI);
2470 Asm->EmitString(getSourceFileName(Id.second));
2472 Asm->EmitULEB128Bytes(Id.first);
2473 Asm->EOL("Directory #");
2474 Asm->EmitULEB128Bytes(0);
2475 Asm->EOL("Mod date");
2476 Asm->EmitULEB128Bytes(0);
2477 Asm->EOL("File size");
2479 Asm->EmitInt8(0); Asm->EOL("End of files");
2481 EmitLabel("line_prolog_end", 0);
2483 // A sequence for each text section.
2484 unsigned SecSrcLinesSize = SectionSourceLines.size();
2486 for (unsigned j = 0; j < SecSrcLinesSize; ++j) {
2487 // Isolate current sections line info.
2488 const std::vector<SrcLineInfo> &LineInfos = SectionSourceLines[j];
2491 const Section* S = SectionMap[j + 1];
2492 O << '\t' << TAI->getCommentString() << " Section"
2493 << S->getName() << '\n';
2497 // Dwarf assumes we start with first line of first source file.
2498 unsigned Source = 1;
2501 // Construct rows of the address, source, line, column matrix.
2502 for (unsigned i = 0, N = LineInfos.size(); i < N; ++i) {
2503 const SrcLineInfo &LineInfo = LineInfos[i];
2504 unsigned LabelID = MMI->MappedLabel(LineInfo.getLabelID());
2505 if (!LabelID) continue;
2510 std::pair<unsigned, unsigned> SourceID =
2511 getSourceDirsectoryAndFileIds(LineInfo.getSourceID());
2512 O << '\t' << TAI->getCommentString() << ' '
2513 << getSourceDirectoryName(SourceID.first) << ' '
2514 << getSourceFileName(SourceID.second)
2515 <<" :" << utostr_32(LineInfo.getLine()) << '\n';
2518 // Define the line address.
2519 Asm->EmitInt8(0); Asm->EOL("Extended Op");
2520 Asm->EmitInt8(TD->getPointerSize() + 1); Asm->EOL("Op size");
2521 Asm->EmitInt8(DW_LNE_set_address); Asm->EOL("DW_LNE_set_address");
2522 EmitReference("label", LabelID); Asm->EOL("Location label");
2524 // If change of source, then switch to the new source.
2525 if (Source != LineInfo.getSourceID()) {
2526 Source = LineInfo.getSourceID();
2527 Asm->EmitInt8(DW_LNS_set_file); Asm->EOL("DW_LNS_set_file");
2528 Asm->EmitULEB128Bytes(Source); Asm->EOL("New Source");
2531 // If change of line.
2532 if (Line != LineInfo.getLine()) {
2533 // Determine offset.
2534 int Offset = LineInfo.getLine() - Line;
2535 int Delta = Offset - MinLineDelta;
2538 Line = LineInfo.getLine();
2540 // If delta is small enough and in range...
2541 if (Delta >= 0 && Delta < (MaxLineDelta - 1)) {
2542 // ... then use fast opcode.
2543 Asm->EmitInt8(Delta - MinLineDelta); Asm->EOL("Line Delta");
2545 // ... otherwise use long hand.
2546 Asm->EmitInt8(DW_LNS_advance_line); Asm->EOL("DW_LNS_advance_line");
2547 Asm->EmitSLEB128Bytes(Offset); Asm->EOL("Line Offset");
2548 Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy");
2551 // Copy the previous row (different address or source)
2552 Asm->EmitInt8(DW_LNS_copy); Asm->EOL("DW_LNS_copy");
2556 EmitEndOfLineMatrix(j + 1);
2559 if (SecSrcLinesSize == 0)
2560 // Because we're emitting a debug_line section, we still need a line
2561 // table. The linker and friends expect it to exist. If there's nothing to
2562 // put into it, emit an empty table.
2563 EmitEndOfLineMatrix(1);
2565 EmitLabel("line_end", 0);
2570 /// EmitCommonDebugFrame - Emit common frame info into a debug frame section.
2572 void EmitCommonDebugFrame() {
2573 if (!TAI->doesDwarfRequireFrameSection())
2577 Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
2578 TargetFrameInfo::StackGrowsUp ?
2579 TD->getPointerSize() : -TD->getPointerSize();
2581 // Start the dwarf frame section.
2582 Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
2584 EmitLabel("debug_frame_common", 0);
2585 EmitDifference("debug_frame_common_end", 0,
2586 "debug_frame_common_begin", 0, true);
2587 Asm->EOL("Length of Common Information Entry");
2589 EmitLabel("debug_frame_common_begin", 0);
2590 Asm->EmitInt32((int)DW_CIE_ID);
2591 Asm->EOL("CIE Identifier Tag");
2592 Asm->EmitInt8(DW_CIE_VERSION);
2593 Asm->EOL("CIE Version");
2594 Asm->EmitString("");
2595 Asm->EOL("CIE Augmentation");
2596 Asm->EmitULEB128Bytes(1);
2597 Asm->EOL("CIE Code Alignment Factor");
2598 Asm->EmitSLEB128Bytes(stackGrowth);
2599 Asm->EOL("CIE Data Alignment Factor");
2600 Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), false));
2601 Asm->EOL("CIE RA Column");
2603 std::vector<MachineMove> Moves;
2604 RI->getInitialFrameState(Moves);
2606 EmitFrameMoves(NULL, 0, Moves, false);
2608 Asm->EmitAlignment(2, 0, 0, false);
2609 EmitLabel("debug_frame_common_end", 0);
2614 /// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
2616 void EmitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) {
2617 if (!TAI->doesDwarfRequireFrameSection())
2620 // Start the dwarf frame section.
2621 Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
2623 EmitDifference("debug_frame_end", DebugFrameInfo.Number,
2624 "debug_frame_begin", DebugFrameInfo.Number, true);
2625 Asm->EOL("Length of Frame Information Entry");
2627 EmitLabel("debug_frame_begin", DebugFrameInfo.Number);
2629 EmitSectionOffset("debug_frame_common", "section_debug_frame",
2631 Asm->EOL("FDE CIE offset");
2633 EmitReference("func_begin", DebugFrameInfo.Number);
2634 Asm->EOL("FDE initial location");
2635 EmitDifference("func_end", DebugFrameInfo.Number,
2636 "func_begin", DebugFrameInfo.Number);
2637 Asm->EOL("FDE address range");
2639 EmitFrameMoves("func_begin", DebugFrameInfo.Number, DebugFrameInfo.Moves,
2642 Asm->EmitAlignment(2, 0, 0, false);
2643 EmitLabel("debug_frame_end", DebugFrameInfo.Number);
2648 void EmitDebugPubNamesPerCU(CompileUnit *Unit) {
2649 EmitDifference("pubnames_end", Unit->getID(),
2650 "pubnames_begin", Unit->getID(), true);
2651 Asm->EOL("Length of Public Names Info");
2653 EmitLabel("pubnames_begin", Unit->getID());
2655 Asm->EmitInt16(DWARF_VERSION); Asm->EOL("DWARF Version");
2657 EmitSectionOffset("info_begin", "section_info",
2658 Unit->getID(), 0, true, false);
2659 Asm->EOL("Offset of Compilation Unit Info");
2661 EmitDifference("info_end", Unit->getID(), "info_begin", Unit->getID(),
2663 Asm->EOL("Compilation Unit Length");
2665 std::map<std::string, DIE *> &Globals = Unit->getGlobals();
2666 for (std::map<std::string, DIE *>::iterator GI = Globals.begin(),
2667 GE = Globals.end(); GI != GE; ++GI) {
2668 const std::string &Name = GI->first;
2669 DIE * Entity = GI->second;
2671 Asm->EmitInt32(Entity->getOffset()); Asm->EOL("DIE offset");
2672 Asm->EmitString(Name); Asm->EOL("External Name");
2675 Asm->EmitInt32(0); Asm->EOL("End Mark");
2676 EmitLabel("pubnames_end", Unit->getID());
2681 /// EmitDebugPubNames - Emit visible names into a debug pubnames section.
2683 void EmitDebugPubNames() {
2684 // Start the dwarf pubnames section.
2685 Asm->SwitchToDataSection(TAI->getDwarfPubNamesSection());
2688 EmitDebugPubNamesPerCU(MainCU);
2692 for (unsigned i = 0, e = CompileUnits.size(); i != e; ++i)
2693 EmitDebugPubNamesPerCU(CompileUnits[i]);
2696 /// EmitDebugStr - Emit visible names into a debug str section.
2698 void EmitDebugStr() {
2699 // Check to see if it is worth the effort.
2700 if (!StringPool.empty()) {
2701 // Start the dwarf str section.
2702 Asm->SwitchToDataSection(TAI->getDwarfStrSection());
2704 // For each of strings in the string pool.
2705 for (unsigned StringID = 1, N = StringPool.size();
2706 StringID <= N; ++StringID) {
2707 // Emit a label for reference from debug information entries.
2708 EmitLabel("string", StringID);
2709 // Emit the string itself.
2710 const std::string &String = StringPool[StringID];
2711 Asm->EmitString(String); Asm->EOL();
2718 /// EmitDebugLoc - Emit visible names into a debug loc section.
2720 void EmitDebugLoc() {
2721 // Start the dwarf loc section.
2722 Asm->SwitchToDataSection(TAI->getDwarfLocSection());
2727 /// EmitDebugARanges - Emit visible names into a debug aranges section.
2729 void EmitDebugARanges() {
2730 // Start the dwarf aranges section.
2731 Asm->SwitchToDataSection(TAI->getDwarfARangesSection());
2735 CompileUnit *Unit = GetBaseCompileUnit();
2737 // Don't include size of length
2738 Asm->EmitInt32(0x1c); Asm->EOL("Length of Address Ranges Info");
2740 Asm->EmitInt16(DWARF_VERSION); Asm->EOL("Dwarf Version");
2742 EmitReference("info_begin", Unit->getID());
2743 Asm->EOL("Offset of Compilation Unit Info");
2745 Asm->EmitInt8(TD->getPointerSize()); Asm->EOL("Size of Address");
2747 Asm->EmitInt8(0); Asm->EOL("Size of Segment Descriptor");
2749 Asm->EmitInt16(0); Asm->EOL("Pad (1)");
2750 Asm->EmitInt16(0); Asm->EOL("Pad (2)");
2753 EmitReference("text_begin", 0); Asm->EOL("Address");
2754 EmitDifference("text_end", 0, "text_begin", 0, true); Asm->EOL("Length");
2756 Asm->EmitInt32(0); Asm->EOL("EOM (1)");
2757 Asm->EmitInt32(0); Asm->EOL("EOM (2)");
2763 /// EmitDebugRanges - Emit visible names into a debug ranges section.
2765 void EmitDebugRanges() {
2766 // Start the dwarf ranges section.
2767 Asm->SwitchToDataSection(TAI->getDwarfRangesSection());
2772 /// EmitDebugMacInfo - Emit visible names into a debug macinfo section.
2774 void EmitDebugMacInfo() {
2775 if (TAI->doesSupportMacInfoSection()) {
2776 // Start the dwarf macinfo section.
2777 Asm->SwitchToDataSection(TAI->getDwarfMacInfoSection());
2783 void ConstructCompileUnit(GlobalVariable *GV) {
2784 DICompileUnit DIUnit(GV);
2785 std::string Dir, FN, Prod;
2786 unsigned ID = getOrCreateSourceID(DIUnit.getDirectory(Dir),
2787 DIUnit.getFilename(FN));
2789 DIE *Die = new DIE(DW_TAG_compile_unit);
2790 AddSectionOffset(Die, DW_AT_stmt_list, DW_FORM_data4,
2791 DWLabel("section_line", 0), DWLabel("section_line", 0),
2793 AddString(Die, DW_AT_producer, DW_FORM_string, DIUnit.getProducer(Prod));
2794 AddUInt(Die, DW_AT_language, DW_FORM_data1, DIUnit.getLanguage());
2795 AddString(Die, DW_AT_name, DW_FORM_string, FN);
2797 AddString(Die, DW_AT_comp_dir, DW_FORM_string, Dir);
2798 if (DIUnit.isOptimized())
2799 AddUInt(Die, DW_AT_APPLE_optimized, DW_FORM_flag, 1);
2801 DIUnit.getFlags(Flags);
2803 AddString(Die, DW_AT_APPLE_flags, DW_FORM_string, Flags);
2804 unsigned RVer = DIUnit.getRunTimeVersion();
2806 AddUInt(Die, DW_AT_APPLE_major_runtime_vers, DW_FORM_data1, RVer);
2808 CompileUnit *Unit = new CompileUnit(ID, Die);
2809 if (DIUnit.isMain()) {
2810 assert(!MainCU && "Multiple main compile units are found!");
2813 CompileUnitMap[DIUnit.getGV()] = Unit;
2814 CompileUnits.push_back(Unit);
2817 /// ConstructCompileUnits - Create a compile unit DIEs.
2818 void ConstructCompileUnits() {
2819 GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.compile_units");
2822 assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
2823 "Malformed compile unit descriptor anchor type");
2824 Constant *RootC = cast<Constant>(*Root->use_begin());
2825 assert(RootC->hasNUsesOrMore(1) &&
2826 "Malformed compile unit descriptor anchor type");
2827 for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
2829 for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
2830 UUI != UUE; ++UUI) {
2831 GlobalVariable *GV = cast<GlobalVariable>(*UUI);
2832 ConstructCompileUnit(GV);
2836 bool ConstructGlobalVariableDIE(GlobalVariable *GV) {
2837 DIGlobalVariable DI_GV(GV);
2838 CompileUnit *DW_Unit = MainCU;
2840 DW_Unit = FindCompileUnit(DI_GV.getCompileUnit());
2842 // Check for pre-existence.
2843 DIE *&Slot = DW_Unit->getDieMapSlotFor(DI_GV.getGV());
2847 DIE *VariableDie = CreateGlobalVariableDIE(DW_Unit, DI_GV);
2850 DIEBlock *Block = new DIEBlock();
2851 AddUInt(Block, 0, DW_FORM_data1, DW_OP_addr);
2852 AddObjectLabel(Block, 0, DW_FORM_udata,
2853 Asm->getGlobalLinkName(DI_GV.getGlobal()));
2854 AddBlock(VariableDie, DW_AT_location, 0, Block);
2858 // Add to context owner.
2859 DW_Unit->getDie()->AddChild(VariableDie);
2860 // Expose as global. FIXME - need to check external flag.
2862 DW_Unit->AddGlobal(DI_GV.getName(Name), VariableDie);
2866 /// ConstructGlobalVariableDIEs - Create DIEs for each of the externally
2867 /// visible global variables. Return true if at least one global DIE is
2869 bool ConstructGlobalVariableDIEs() {
2870 GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.global_variables");
2874 assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
2875 "Malformed global variable descriptor anchor type");
2876 Constant *RootC = cast<Constant>(*Root->use_begin());
2877 assert(RootC->hasNUsesOrMore(1) &&
2878 "Malformed global variable descriptor anchor type");
2880 bool Result = false;
2881 for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
2883 for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
2884 UUI != UUE; ++UUI) {
2885 GlobalVariable *GV = cast<GlobalVariable>(*UUI);
2886 Result |= ConstructGlobalVariableDIE(GV);
2891 bool ConstructSubprogram(GlobalVariable *GV) {
2892 DISubprogram SP(GV);
2893 CompileUnit *Unit = MainCU;
2895 Unit = FindCompileUnit(SP.getCompileUnit());
2897 // Check for pre-existence.
2898 DIE *&Slot = Unit->getDieMapSlotFor(GV);
2902 if (!SP.isDefinition())
2903 // This is a method declaration which will be handled while
2904 // constructing class type.
2907 DIE *SubprogramDie = CreateSubprogramDIE(Unit, SP);
2910 Slot = SubprogramDie;
2911 // Add to context owner.
2912 Unit->getDie()->AddChild(SubprogramDie);
2913 // Expose as global.
2915 Unit->AddGlobal(SP.getName(Name), SubprogramDie);
2919 /// ConstructSubprograms - Create DIEs for each of the externally visible
2920 /// subprograms. Return true if at least one subprogram DIE is created.
2921 bool ConstructSubprograms() {
2922 GlobalVariable *Root = M->getGlobalVariable("llvm.dbg.subprograms");
2926 assert(Root->hasLinkOnceLinkage() && Root->hasOneUse() &&
2927 "Malformed subprogram descriptor anchor type");
2928 Constant *RootC = cast<Constant>(*Root->use_begin());
2929 assert(RootC->hasNUsesOrMore(1) &&
2930 "Malformed subprogram descriptor anchor type");
2932 bool Result = false;
2933 for (Value::use_iterator UI = RootC->use_begin(), UE = Root->use_end();
2935 for (Value::use_iterator UUI = UI->use_begin(), UUE = UI->use_end();
2936 UUI != UUE; ++UUI) {
2937 GlobalVariable *GV = cast<GlobalVariable>(*UUI);
2938 Result |= ConstructSubprogram(GV);
2944 //===--------------------------------------------------------------------===//
2945 // Main entry points.
2947 DwarfDebug(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
2948 : Dwarf(OS, A, T, "dbg")
2950 , AbbreviationsSet(InitAbbreviationsSetSize)
2952 , ValuesSet(InitValuesSetSize)
2956 , SectionSourceLines()
2959 , RootDbgScope(NULL)
2962 virtual ~DwarfDebug() {
2963 for (unsigned j = 0, M = Values.size(); j < M; ++j)
2967 /// SetDebugInfo - Create global DIEs and emit initial debug info sections.
2968 /// This is inovked by the target AsmPrinter.
2969 void SetDebugInfo(MachineModuleInfo *mmi) {
2970 // Create all the compile unit DIEs.
2971 ConstructCompileUnits();
2973 if (CompileUnits.empty())
2976 // Create DIEs for each of the externally visible global variables.
2977 bool globalDIEs = ConstructGlobalVariableDIEs();
2979 // Create DIEs for each of the externally visible subprograms.
2980 bool subprogramDIEs = ConstructSubprograms();
2982 // If there is not any debug info available for any global variables
2983 // and any subprograms then there is not any debug info to emit.
2984 if (!globalDIEs && !subprogramDIEs)
2989 MMI->setDebugInfoAvailability(true);
2991 // Prime section data.
2992 SectionMap.insert(TAI->getTextSection());
2994 // Print out .file directives to specify files for .loc directives. These
2995 // are printed out early so that they precede any .loc directives.
2996 if (TAI->hasDotLocAndDotFile()) {
2997 for (unsigned i = 1, e = getNumSourceIds()+1; i != e; ++i) {
2998 // Remember source id starts at 1.
2999 std::pair<unsigned, unsigned> Id = getSourceDirsectoryAndFileIds(i);
3000 sys::Path FullPath(getSourceDirectoryName(Id.first));
3002 FullPath.appendComponent(getSourceFileName(Id.second));
3003 assert(AppendOk && "Could not append filename to directory!");
3005 Asm->EmitFile(i, FullPath.toString());
3010 // Emit initial sections
3014 /// BeginModule - Emit all Dwarf sections that should come prior to the
3016 void BeginModule(Module *M) {
3020 /// EndModule - Emit all Dwarf sections that should come after the content.
3023 if (!ShouldEmitDwarfDebug()) return;
3025 // Standard sections final addresses.
3026 Asm->SwitchToSection(TAI->getTextSection());
3027 EmitLabel("text_end", 0);
3028 Asm->SwitchToSection(TAI->getDataSection());
3029 EmitLabel("data_end", 0);
3031 // End text sections.
3032 for (unsigned i = 1, N = SectionMap.size(); i <= N; ++i) {
3033 Asm->SwitchToSection(SectionMap[i]);
3034 EmitLabel("section_end", i);
3037 // Emit common frame information.
3038 EmitCommonDebugFrame();
3040 // Emit function debug frame information
3041 for (std::vector<FunctionDebugFrameInfo>::iterator I = DebugFrames.begin(),
3042 E = DebugFrames.end(); I != E; ++I)
3043 EmitFunctionDebugFrame(*I);
3045 // Compute DIE offsets and sizes.
3048 // Emit all the DIEs into a debug info section
3051 // Corresponding abbreviations into a abbrev section.
3052 EmitAbbreviations();
3054 // Emit source line correspondence into a debug line section.
3057 // Emit info into a debug pubnames section.
3058 EmitDebugPubNames();
3060 // Emit info into a debug str section.
3063 // Emit info into a debug loc section.
3066 // Emit info into a debug aranges section.
3069 // Emit info into a debug ranges section.
3072 // Emit info into a debug macinfo section.
3076 /// BeginFunction - Gather pre-function debug information. Assumes being
3077 /// emitted immediately after the function entry point.
3078 void BeginFunction(MachineFunction *MF) {
3081 if (!ShouldEmitDwarfDebug()) return;
3083 // Begin accumulating function debug information.
3084 MMI->BeginFunction(MF);
3086 // Assumes in correct section after the entry point.
3087 EmitLabel("func_begin", ++SubprogramCount);
3089 // Emit label for the implicitly defined dbg.stoppoint at the start of
3091 if (!Lines.empty()) {
3092 const SrcLineInfo &LineInfo = Lines[0];
3093 Asm->printLabel(LineInfo.getLabelID());
3097 /// EndFunction - Gather and emit post-function debug information.
3099 void EndFunction(MachineFunction *MF) {
3100 if (!ShouldEmitDwarfDebug()) return;
3102 // Define end label for subprogram.
3103 EmitLabel("func_end", SubprogramCount);
3105 // Get function line info.
3106 if (!Lines.empty()) {
3107 // Get section line info.
3108 unsigned ID = SectionMap.insert(Asm->CurrentSection_);
3109 if (SectionSourceLines.size() < ID) SectionSourceLines.resize(ID);
3110 std::vector<SrcLineInfo> &SectionLineInfos = SectionSourceLines[ID-1];
3111 // Append the function info to section info.
3112 SectionLineInfos.insert(SectionLineInfos.end(),
3113 Lines.begin(), Lines.end());
3116 // Construct scopes for subprogram.
3118 ConstructRootDbgScope(RootDbgScope);
3120 // FIXME: This is wrong. We are essentially getting past a problem with
3121 // debug information not being able to handle unreachable blocks that have
3122 // debug information in them. In particular, those unreachable blocks that
3123 // have "region end" info in them. That situation results in the "root
3124 // scope" not being created. If that's the case, then emit a "default"
3125 // scope, i.e., one that encompasses the whole function. This isn't
3126 // desirable. And a better way of handling this (and all of the debugging
3127 // information) needs to be explored.
3128 ConstructDefaultDbgScope(MF);
3130 DebugFrames.push_back(FunctionDebugFrameInfo(SubprogramCount,
3131 MMI->getFrameMoves()));
3135 delete RootDbgScope;
3136 DbgScopeMap.clear();
3137 RootDbgScope = NULL;
3144 /// ValidDebugInfo - Return true if V represents valid debug info value.
3145 bool ValidDebugInfo(Value *V) {
3152 GlobalVariable *GV = getGlobalVariable(V);
3156 if (!GV->hasInternalLinkage () && !GV->hasLinkOnceLinkage())
3159 DIDescriptor DI(GV);
3160 // Check current version. Allow Version6 for now.
3161 unsigned Version = DI.getVersion();
3162 if (Version != LLVMDebugVersion && Version != LLVMDebugVersion6)
3165 unsigned Tag = DI.getTag();
3167 case DW_TAG_variable:
3168 assert(DIVariable(GV).Verify() && "Invalid DebugInfo value");
3170 case DW_TAG_compile_unit:
3171 assert(DICompileUnit(GV).Verify() && "Invalid DebugInfo value");
3173 case DW_TAG_subprogram:
3174 assert(DISubprogram(GV).Verify() && "Invalid DebugInfo value");
3183 /// RecordSourceLine - Records location information and associates it with a
3184 /// label. Returns a unique label ID used to generate a label and provide
3185 /// correspondence to the source line list.
3186 unsigned RecordSourceLine(Value *V, unsigned Line, unsigned Col) {
3187 CompileUnit *Unit = CompileUnitMap[V];
3188 assert(Unit && "Unable to find CompileUnit");
3189 unsigned ID = MMI->NextLabelID();
3190 Lines.push_back(SrcLineInfo(Line, Col, Unit->getID(), ID));
3194 /// RecordSourceLine - Records location information and associates it with a
3195 /// label. Returns a unique label ID used to generate a label and provide
3196 /// correspondence to the source line list.
3197 unsigned RecordSourceLine(unsigned Line, unsigned Col, unsigned Src) {
3198 unsigned ID = MMI->NextLabelID();
3199 Lines.push_back(SrcLineInfo(Line, Col, Src, ID));
3203 unsigned getRecordSourceLineCount() {
3204 return Lines.size();
3207 /// getNumSourceDirectories - Return the number of source directories in the
3209 unsigned getNumSourceDirectories() const {
3210 return DirectoryNames.size();
3213 /// getSourceDirectoryName - Return the name of the directory corresponding
3215 const std::string &getSourceDirectoryName(unsigned Id) const {
3216 return DirectoryNames[Id - 1];
3219 /// getNumSourceFiles - Return the number of source files in the debug info.
3221 unsigned getNumSourceFiles() const {
3222 return SourceFileNames.size();
3225 /// getSourceFileName - Return the name of the source file corresponding
3227 const std::string &getSourceFileName(unsigned Id) const {
3228 return SourceFileNames[Id - 1];
3231 /// getNumSourceIds - Return the number of unique source ids.
3233 unsigned getNumSourceIds() const {
3234 return SourceIds.size();
3237 /// getSourceDirsectoryAndFileIds - Return the directory and file ids that
3238 /// maps to the source id. Source id starts at 1.
3239 std::pair<unsigned, unsigned>
3240 getSourceDirsectoryAndFileIds(unsigned SId) const {
3241 return SourceIds[SId-1];
3244 /// getOrCreateSourceID - Look up the source id with the given directory and
3245 /// source file names. If none currently exists, create a new id and insert it
3246 /// in the SourceIds map. This can update DirectoryNames and SourceFileNames maps
3248 unsigned getOrCreateSourceID(const std::string &DirName,
3249 const std::string &FileName) {
3251 StringMap<unsigned>::iterator DI = DirectoryIdMap.find(DirName);
3252 if (DI != DirectoryIdMap.end())
3253 DId = DI->getValue();
3255 DId = DirectoryNames.size() + 1;
3256 DirectoryIdMap[DirName] = DId;
3257 DirectoryNames.push_back(DirName);
3261 StringMap<unsigned>::iterator FI = SourceFileIdMap.find(FileName);
3262 if (FI != SourceFileIdMap.end())
3263 FId = FI->getValue();
3265 FId = SourceFileNames.size() + 1;
3266 SourceFileIdMap[FileName] = FId;
3267 SourceFileNames.push_back(FileName);
3270 DenseMap<std::pair<unsigned, unsigned>, unsigned>::iterator SI =
3271 SourceIdMap.find(std::make_pair(DId, FId));
3272 if (SI != SourceIdMap.end())
3274 unsigned SrcId = SourceIds.size() + 1; // DW_AT_decl_file cannot be 0.
3275 SourceIdMap[std::make_pair(DId, FId)] = SrcId;
3276 SourceIds.push_back(std::make_pair(DId, FId));
3280 /// RecordRegionStart - Indicate the start of a region.
3282 unsigned RecordRegionStart(GlobalVariable *V) {
3283 DbgScope *Scope = getOrCreateScope(V);
3284 unsigned ID = MMI->NextLabelID();
3285 if (!Scope->getStartLabelID()) Scope->setStartLabelID(ID);
3289 /// RecordRegionEnd - Indicate the end of a region.
3291 unsigned RecordRegionEnd(GlobalVariable *V) {
3292 DbgScope *Scope = getOrCreateScope(V);
3293 unsigned ID = MMI->NextLabelID();
3294 Scope->setEndLabelID(ID);
3298 /// RecordVariable - Indicate the declaration of a local variable.
3300 void RecordVariable(GlobalVariable *GV, unsigned FrameIndex) {
3301 DIDescriptor Desc(GV);
3302 DbgScope *Scope = NULL;
3303 if (Desc.getTag() == DW_TAG_variable) {
3304 // GV is a global variable.
3305 DIGlobalVariable DG(GV);
3306 Scope = getOrCreateScope(DG.getContext().getGV());
3308 // or GV is a local variable.
3310 Scope = getOrCreateScope(DV.getContext().getGV());
3312 assert(Scope && "Unable to find variable' scope");
3313 DbgVariable *DV = new DbgVariable(DIVariable(GV), FrameIndex);
3314 Scope->AddVariable(DV);
3318 //===----------------------------------------------------------------------===//
3319 /// DwarfException - Emits Dwarf exception handling directives.
3321 class DwarfException : public Dwarf {
3322 struct FunctionEHFrameInfo {
3325 unsigned PersonalityIndex;
3327 bool hasLandingPads;
3328 std::vector<MachineMove> Moves;
3329 const Function * function;
3331 FunctionEHFrameInfo(const std::string &FN, unsigned Num, unsigned P,
3333 const std::vector<MachineMove> &M,
3335 FnName(FN), Number(Num), PersonalityIndex(P),
3336 hasCalls(hC), hasLandingPads(hL), Moves(M), function (f) { }
3339 std::vector<FunctionEHFrameInfo> EHFrames;
3341 /// shouldEmitTable - Per-function flag to indicate if EH tables should
3343 bool shouldEmitTable;
3345 /// shouldEmitMoves - Per-function flag to indicate if frame moves info
3346 /// should be emitted.
3347 bool shouldEmitMoves;
3349 /// shouldEmitTableModule - Per-module flag to indicate if EH tables
3350 /// should be emitted.
3351 bool shouldEmitTableModule;
3353 /// shouldEmitFrameModule - Per-module flag to indicate if frame moves
3354 /// should be emitted.
3355 bool shouldEmitMovesModule;
3357 /// EmitCommonEHFrame - Emit the common eh unwind frame.
3359 void EmitCommonEHFrame(const Function *Personality, unsigned Index) {
3360 // Size and sign of stack growth.
3362 Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
3363 TargetFrameInfo::StackGrowsUp ?
3364 TD->getPointerSize() : -TD->getPointerSize();
3366 // Begin eh frame section.
3367 Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
3369 if (!TAI->doesRequireNonLocalEHFrameLabel())
3370 O << TAI->getEHGlobalPrefix();
3371 O << "EH_frame" << Index << ":\n";
3372 EmitLabel("section_eh_frame", Index);
3374 // Define base labels.
3375 EmitLabel("eh_frame_common", Index);
3377 // Define the eh frame length.
3378 EmitDifference("eh_frame_common_end", Index,
3379 "eh_frame_common_begin", Index, true);
3380 Asm->EOL("Length of Common Information Entry");
3383 EmitLabel("eh_frame_common_begin", Index);
3384 Asm->EmitInt32((int)0);
3385 Asm->EOL("CIE Identifier Tag");
3386 Asm->EmitInt8(DW_CIE_VERSION);
3387 Asm->EOL("CIE Version");
3389 // The personality presence indicates that language specific information
3390 // will show up in the eh frame.
3391 Asm->EmitString(Personality ? "zPLR" : "zR");
3392 Asm->EOL("CIE Augmentation");
3394 // Round out reader.
3395 Asm->EmitULEB128Bytes(1);
3396 Asm->EOL("CIE Code Alignment Factor");
3397 Asm->EmitSLEB128Bytes(stackGrowth);
3398 Asm->EOL("CIE Data Alignment Factor");
3399 Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), true));
3400 Asm->EOL("CIE Return Address Column");
3402 // If there is a personality, we need to indicate the functions location.
3404 Asm->EmitULEB128Bytes(7);
3405 Asm->EOL("Augmentation Size");
3407 if (TAI->getNeedsIndirectEncoding()) {
3408 Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4 | DW_EH_PE_indirect);
3409 Asm->EOL("Personality (pcrel sdata4 indirect)");
3411 Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
3412 Asm->EOL("Personality (pcrel sdata4)");
3415 PrintRelDirective(true);
3416 O << TAI->getPersonalityPrefix();
3417 Asm->EmitExternalGlobal((const GlobalVariable *)(Personality));
3418 O << TAI->getPersonalitySuffix();
3419 if (strcmp(TAI->getPersonalitySuffix(), "+4@GOTPCREL"))
3420 O << "-" << TAI->getPCSymbol();
3421 Asm->EOL("Personality");
3423 Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
3424 Asm->EOL("LSDA Encoding (pcrel sdata4)");
3426 Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
3427 Asm->EOL("FDE Encoding (pcrel sdata4)");
3429 Asm->EmitULEB128Bytes(1);
3430 Asm->EOL("Augmentation Size");
3432 Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_sdata4);
3433 Asm->EOL("FDE Encoding (pcrel sdata4)");
3436 // Indicate locations of general callee saved registers in frame.
3437 std::vector<MachineMove> Moves;
3438 RI->getInitialFrameState(Moves);
3439 EmitFrameMoves(NULL, 0, Moves, true);
3441 // On Darwin the linker honors the alignment of eh_frame, which means it
3442 // must be 8-byte on 64-bit targets to match what gcc does. Otherwise
3443 // you get holes which confuse readers of eh_frame.
3444 Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
3446 EmitLabel("eh_frame_common_end", Index);
3451 /// EmitEHFrame - Emit function exception frame information.
3453 void EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) {
3454 Function::LinkageTypes linkage = EHFrameInfo.function->getLinkage();
3456 Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
3458 // Externally visible entry into the functions eh frame info.
3459 // If the corresponding function is static, this should not be
3460 // externally visible.
3461 if (linkage != Function::InternalLinkage &&
3462 linkage != Function::PrivateLinkage) {
3463 if (const char *GlobalEHDirective = TAI->getGlobalEHDirective())
3464 O << GlobalEHDirective << EHFrameInfo.FnName << "\n";
3467 // If corresponding function is weak definition, this should be too.
3468 if ((linkage == Function::WeakAnyLinkage ||
3469 linkage == Function::WeakODRLinkage ||
3470 linkage == Function::LinkOnceAnyLinkage ||
3471 linkage == Function::LinkOnceODRLinkage) &&
3472 TAI->getWeakDefDirective())
3473 O << TAI->getWeakDefDirective() << EHFrameInfo.FnName << "\n";
3475 // If there are no calls then you can't unwind. This may mean we can
3476 // omit the EH Frame, but some environments do not handle weak absolute
3478 // If UnwindTablesMandatory is set we cannot do this optimization; the
3479 // unwind info is to be available for non-EH uses.
3480 if (!EHFrameInfo.hasCalls &&
3481 !UnwindTablesMandatory &&
3482 ((linkage != Function::WeakAnyLinkage &&
3483 linkage != Function::WeakODRLinkage &&
3484 linkage != Function::LinkOnceAnyLinkage &&
3485 linkage != Function::LinkOnceODRLinkage) ||
3486 !TAI->getWeakDefDirective() ||
3487 TAI->getSupportsWeakOmittedEHFrame()))
3489 O << EHFrameInfo.FnName << " = 0\n";
3490 // This name has no connection to the function, so it might get
3491 // dead-stripped when the function is not, erroneously. Prohibit
3492 // dead-stripping unconditionally.
3493 if (const char *UsedDirective = TAI->getUsedDirective())
3494 O << UsedDirective << EHFrameInfo.FnName << "\n\n";
3496 O << EHFrameInfo.FnName << ":\n";
3499 EmitDifference("eh_frame_end", EHFrameInfo.Number,
3500 "eh_frame_begin", EHFrameInfo.Number, true);
3501 Asm->EOL("Length of Frame Information Entry");
3503 EmitLabel("eh_frame_begin", EHFrameInfo.Number);
3505 if (TAI->doesRequireNonLocalEHFrameLabel()) {
3506 PrintRelDirective(true, true);
3507 PrintLabelName("eh_frame_begin", EHFrameInfo.Number);
3509 if (!TAI->isAbsoluteEHSectionOffsets())
3510 O << "-EH_frame" << EHFrameInfo.PersonalityIndex;
3512 EmitSectionOffset("eh_frame_begin", "eh_frame_common",
3513 EHFrameInfo.Number, EHFrameInfo.PersonalityIndex,
3517 Asm->EOL("FDE CIE offset");
3519 EmitReference("eh_func_begin", EHFrameInfo.Number, true, true);
3520 Asm->EOL("FDE initial location");
3521 EmitDifference("eh_func_end", EHFrameInfo.Number,
3522 "eh_func_begin", EHFrameInfo.Number, true);
3523 Asm->EOL("FDE address range");
3525 // If there is a personality and landing pads then point to the language
3526 // specific data area in the exception table.
3527 if (EHFrameInfo.PersonalityIndex) {
3528 Asm->EmitULEB128Bytes(4);
3529 Asm->EOL("Augmentation size");
3531 if (EHFrameInfo.hasLandingPads)
3532 EmitReference("exception", EHFrameInfo.Number, true, true);
3534 Asm->EmitInt32((int)0);
3535 Asm->EOL("Language Specific Data Area");
3537 Asm->EmitULEB128Bytes(0);
3538 Asm->EOL("Augmentation size");
3541 // Indicate locations of function specific callee saved registers in
3543 EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves,
3546 // On Darwin the linker honors the alignment of eh_frame, which means it
3547 // must be 8-byte on 64-bit targets to match what gcc does. Otherwise
3548 // you get holes which confuse readers of eh_frame.
3549 Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3,
3551 EmitLabel("eh_frame_end", EHFrameInfo.Number);
3553 // If the function is marked used, this table should be also. We cannot
3554 // make the mark unconditional in this case, since retaining the table
3555 // also retains the function in this case, and there is code around
3556 // that depends on unused functions (calling undefined externals) being
3557 // dead-stripped to link correctly. Yes, there really is.
3558 if (MMI->getUsedFunctions().count(EHFrameInfo.function))
3559 if (const char *UsedDirective = TAI->getUsedDirective())
3560 O << UsedDirective << EHFrameInfo.FnName << "\n\n";
3564 /// EmitExceptionTable - Emit landing pads and actions.
3566 /// The general organization of the table is complex, but the basic concepts
3567 /// are easy. First there is a header which describes the location and
3568 /// organization of the three components that follow.
3569 /// 1. The landing pad site information describes the range of code covered
3570 /// by the try. In our case it's an accumulation of the ranges covered
3571 /// by the invokes in the try. There is also a reference to the landing
3572 /// pad that handles the exception once processed. Finally an index into
3573 /// the actions table.
3574 /// 2. The action table, in our case, is composed of pairs of type ids
3575 /// and next action offset. Starting with the action index from the
3576 /// landing pad site, each type Id is checked for a match to the current
3577 /// exception. If it matches then the exception and type id are passed
3578 /// on to the landing pad. Otherwise the next action is looked up. This
3579 /// chain is terminated with a next action of zero. If no type id is
3580 /// found the the frame is unwound and handling continues.
3581 /// 3. Type id table contains references to all the C++ typeinfo for all
3582 /// catches in the function. This tables is reversed indexed base 1.
3584 /// SharedTypeIds - How many leading type ids two landing pads have in common.
3585 static unsigned SharedTypeIds(const LandingPadInfo *L,
3586 const LandingPadInfo *R) {
3587 const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
3588 unsigned LSize = LIds.size(), RSize = RIds.size();
3589 unsigned MinSize = LSize < RSize ? LSize : RSize;
3592 for (; Count != MinSize; ++Count)
3593 if (LIds[Count] != RIds[Count])
3599 /// PadLT - Order landing pads lexicographically by type id.
3600 static bool PadLT(const LandingPadInfo *L, const LandingPadInfo *R) {
3601 const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
3602 unsigned LSize = LIds.size(), RSize = RIds.size();
3603 unsigned MinSize = LSize < RSize ? LSize : RSize;
3605 for (unsigned i = 0; i != MinSize; ++i)
3606 if (LIds[i] != RIds[i])
3607 return LIds[i] < RIds[i];
3609 return LSize < RSize;
3613 static inline unsigned getEmptyKey() { return -1U; }
3614 static inline unsigned getTombstoneKey() { return -2U; }
3615 static unsigned getHashValue(const unsigned &Key) { return Key; }
3616 static bool isEqual(unsigned LHS, unsigned RHS) { return LHS == RHS; }
3617 static bool isPod() { return true; }
3620 /// ActionEntry - Structure describing an entry in the actions table.
3621 struct ActionEntry {
3622 int ValueForTypeID; // The value to write - may not be equal to the type id.
3624 struct ActionEntry *Previous;
3627 /// PadRange - Structure holding a try-range and the associated landing pad.
3629 // The index of the landing pad.
3631 // The index of the begin and end labels in the landing pad's label lists.
3632 unsigned RangeIndex;
3635 typedef DenseMap<unsigned, PadRange, KeyInfo> RangeMapType;
3637 /// CallSiteEntry - Structure describing an entry in the call-site table.
3638 struct CallSiteEntry {
3639 // The 'try-range' is BeginLabel .. EndLabel.
3640 unsigned BeginLabel; // zero indicates the start of the function.
3641 unsigned EndLabel; // zero indicates the end of the function.
3642 // The landing pad starts at PadLabel.
3643 unsigned PadLabel; // zero indicates that there is no landing pad.
3647 void EmitExceptionTable() {
3648 const std::vector<GlobalVariable *> &TypeInfos = MMI->getTypeInfos();
3649 const std::vector<unsigned> &FilterIds = MMI->getFilterIds();
3650 const std::vector<LandingPadInfo> &PadInfos = MMI->getLandingPads();
3651 if (PadInfos.empty()) return;
3653 // Sort the landing pads in order of their type ids. This is used to fold
3654 // duplicate actions.
3655 SmallVector<const LandingPadInfo *, 64> LandingPads;
3656 LandingPads.reserve(PadInfos.size());
3657 for (unsigned i = 0, N = PadInfos.size(); i != N; ++i)
3658 LandingPads.push_back(&PadInfos[i]);
3659 std::sort(LandingPads.begin(), LandingPads.end(), PadLT);
3661 // Negative type ids index into FilterIds, positive type ids index into
3662 // TypeInfos. The value written for a positive type id is just the type
3663 // id itself. For a negative type id, however, the value written is the
3664 // (negative) byte offset of the corresponding FilterIds entry. The byte
3665 // offset is usually equal to the type id, because the FilterIds entries
3666 // are written using a variable width encoding which outputs one byte per
3667 // entry as long as the value written is not too large, but can differ.
3668 // This kind of complication does not occur for positive type ids because
3669 // type infos are output using a fixed width encoding.
3670 // FilterOffsets[i] holds the byte offset corresponding to FilterIds[i].
3671 SmallVector<int, 16> FilterOffsets;
3672 FilterOffsets.reserve(FilterIds.size());
3674 for(std::vector<unsigned>::const_iterator I = FilterIds.begin(),
3675 E = FilterIds.end(); I != E; ++I) {
3676 FilterOffsets.push_back(Offset);
3677 Offset -= TargetAsmInfo::getULEB128Size(*I);
3680 // Compute the actions table and gather the first action index for each
3681 // landing pad site.
3682 SmallVector<ActionEntry, 32> Actions;
3683 SmallVector<unsigned, 64> FirstActions;
3684 FirstActions.reserve(LandingPads.size());
3686 int FirstAction = 0;
3687 unsigned SizeActions = 0;
3688 for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
3689 const LandingPadInfo *LP = LandingPads[i];
3690 const std::vector<int> &TypeIds = LP->TypeIds;
3691 const unsigned NumShared = i ? SharedTypeIds(LP, LandingPads[i-1]) : 0;
3692 unsigned SizeSiteActions = 0;
3694 if (NumShared < TypeIds.size()) {
3695 unsigned SizeAction = 0;
3696 ActionEntry *PrevAction = 0;
3699 const unsigned SizePrevIds = LandingPads[i-1]->TypeIds.size();
3700 assert(Actions.size());
3701 PrevAction = &Actions.back();
3702 SizeAction = TargetAsmInfo::getSLEB128Size(PrevAction->NextAction) +
3703 TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
3704 for (unsigned j = NumShared; j != SizePrevIds; ++j) {
3706 TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
3707 SizeAction += -PrevAction->NextAction;
3708 PrevAction = PrevAction->Previous;
3712 // Compute the actions.
3713 for (unsigned I = NumShared, M = TypeIds.size(); I != M; ++I) {
3714 int TypeID = TypeIds[I];
3715 assert(-1-TypeID < (int)FilterOffsets.size() && "Unknown filter id!");
3716 int ValueForTypeID = TypeID < 0 ? FilterOffsets[-1 - TypeID] : TypeID;
3717 unsigned SizeTypeID = TargetAsmInfo::getSLEB128Size(ValueForTypeID);
3719 int NextAction = SizeAction ? -(SizeAction + SizeTypeID) : 0;
3720 SizeAction = SizeTypeID + TargetAsmInfo::getSLEB128Size(NextAction);
3721 SizeSiteActions += SizeAction;
3723 ActionEntry Action = {ValueForTypeID, NextAction, PrevAction};
3724 Actions.push_back(Action);
3726 PrevAction = &Actions.back();
3729 // Record the first action of the landing pad site.
3730 FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
3731 } // else identical - re-use previous FirstAction
3733 FirstActions.push_back(FirstAction);
3735 // Compute this sites contribution to size.
3736 SizeActions += SizeSiteActions;
3739 // Compute the call-site table. The entry for an invoke has a try-range
3740 // containing the call, a non-zero landing pad and an appropriate action.
3741 // The entry for an ordinary call has a try-range containing the call and
3742 // zero for the landing pad and the action. Calls marked 'nounwind' have
3743 // no entry and must not be contained in the try-range of any entry - they
3744 // form gaps in the table. Entries must be ordered by try-range address.
3745 SmallVector<CallSiteEntry, 64> CallSites;
3747 RangeMapType PadMap;
3748 // Invokes and nounwind calls have entries in PadMap (due to being bracketed
3749 // by try-range labels when lowered). Ordinary calls do not, so appropriate
3750 // try-ranges for them need be deduced.
3751 for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
3752 const LandingPadInfo *LandingPad = LandingPads[i];
3753 for (unsigned j = 0, E = LandingPad->BeginLabels.size(); j != E; ++j) {
3754 unsigned BeginLabel = LandingPad->BeginLabels[j];
3755 assert(!PadMap.count(BeginLabel) && "Duplicate landing pad labels!");
3756 PadRange P = { i, j };
3757 PadMap[BeginLabel] = P;
3761 // The end label of the previous invoke or nounwind try-range.
3762 unsigned LastLabel = 0;
3764 // Whether there is a potentially throwing instruction (currently this means
3765 // an ordinary call) between the end of the previous try-range and now.
3766 bool SawPotentiallyThrowing = false;
3768 // Whether the last callsite entry was for an invoke.
3769 bool PreviousIsInvoke = false;
3771 // Visit all instructions in order of address.
3772 for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
3774 for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
3776 if (!MI->isLabel()) {
3777 SawPotentiallyThrowing |= MI->getDesc().isCall();
3781 unsigned BeginLabel = MI->getOperand(0).getImm();
3782 assert(BeginLabel && "Invalid label!");
3784 // End of the previous try-range?
3785 if (BeginLabel == LastLabel)
3786 SawPotentiallyThrowing = false;
3788 // Beginning of a new try-range?
3789 RangeMapType::iterator L = PadMap.find(BeginLabel);
3790 if (L == PadMap.end())
3791 // Nope, it was just some random label.
3794 PadRange P = L->second;
3795 const LandingPadInfo *LandingPad = LandingPads[P.PadIndex];
3797 assert(BeginLabel == LandingPad->BeginLabels[P.RangeIndex] &&
3798 "Inconsistent landing pad map!");
3800 // If some instruction between the previous try-range and this one may
3801 // throw, create a call-site entry with no landing pad for the region
3802 // between the try-ranges.
3803 if (SawPotentiallyThrowing) {
3804 CallSiteEntry Site = {LastLabel, BeginLabel, 0, 0};
3805 CallSites.push_back(Site);
3806 PreviousIsInvoke = false;
3809 LastLabel = LandingPad->EndLabels[P.RangeIndex];
3810 assert(BeginLabel && LastLabel && "Invalid landing pad!");
3812 if (LandingPad->LandingPadLabel) {
3813 // This try-range is for an invoke.
3814 CallSiteEntry Site = {BeginLabel, LastLabel,
3815 LandingPad->LandingPadLabel, FirstActions[P.PadIndex]};
3817 // Try to merge with the previous call-site.
3818 if (PreviousIsInvoke) {
3819 CallSiteEntry &Prev = CallSites.back();
3820 if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) {
3821 // Extend the range of the previous entry.
3822 Prev.EndLabel = Site.EndLabel;
3827 // Otherwise, create a new call-site.
3828 CallSites.push_back(Site);
3829 PreviousIsInvoke = true;
3832 PreviousIsInvoke = false;
3836 // If some instruction between the previous try-range and the end of the
3837 // function may throw, create a call-site entry with no landing pad for the
3838 // region following the try-range.
3839 if (SawPotentiallyThrowing) {
3840 CallSiteEntry Site = {LastLabel, 0, 0, 0};
3841 CallSites.push_back(Site);
3847 const unsigned SiteStartSize = sizeof(int32_t); // DW_EH_PE_udata4
3848 const unsigned SiteLengthSize = sizeof(int32_t); // DW_EH_PE_udata4
3849 const unsigned LandingPadSize = sizeof(int32_t); // DW_EH_PE_udata4
3850 unsigned SizeSites = CallSites.size() * (SiteStartSize +
3853 for (unsigned i = 0, e = CallSites.size(); i < e; ++i)
3854 SizeSites += TargetAsmInfo::getULEB128Size(CallSites[i].Action);
3857 const unsigned TypeInfoSize = TD->getPointerSize(); // DW_EH_PE_absptr
3858 unsigned SizeTypes = TypeInfos.size() * TypeInfoSize;
3860 unsigned TypeOffset = sizeof(int8_t) + // Call site format
3861 TargetAsmInfo::getULEB128Size(SizeSites) + // Call-site table length
3862 SizeSites + SizeActions + SizeTypes;
3864 unsigned TotalSize = sizeof(int8_t) + // LPStart format
3865 sizeof(int8_t) + // TType format
3866 TargetAsmInfo::getULEB128Size(TypeOffset) + // TType base offset
3869 unsigned SizeAlign = (4 - TotalSize) & 3;
3871 // Begin the exception table.
3872 Asm->SwitchToDataSection(TAI->getDwarfExceptionSection());
3873 Asm->EmitAlignment(2, 0, 0, false);
3874 O << "GCC_except_table" << SubprogramCount << ":\n";
3875 for (unsigned i = 0; i != SizeAlign; ++i) {
3877 Asm->EOL("Padding");
3879 EmitLabel("exception", SubprogramCount);
3882 Asm->EmitInt8(DW_EH_PE_omit);
3883 Asm->EOL("LPStart format (DW_EH_PE_omit)");
3884 Asm->EmitInt8(DW_EH_PE_absptr);
3885 Asm->EOL("TType format (DW_EH_PE_absptr)");
3886 Asm->EmitULEB128Bytes(TypeOffset);
3887 Asm->EOL("TType base offset");
3888 Asm->EmitInt8(DW_EH_PE_udata4);
3889 Asm->EOL("Call site format (DW_EH_PE_udata4)");
3890 Asm->EmitULEB128Bytes(SizeSites);
3891 Asm->EOL("Call-site table length");
3893 // Emit the landing pad site information.
3894 for (unsigned i = 0; i < CallSites.size(); ++i) {
3895 CallSiteEntry &S = CallSites[i];
3896 const char *BeginTag;
3897 unsigned BeginNumber;
3899 if (!S.BeginLabel) {
3900 BeginTag = "eh_func_begin";
3901 BeginNumber = SubprogramCount;
3904 BeginNumber = S.BeginLabel;
3907 EmitSectionOffset(BeginTag, "eh_func_begin", BeginNumber, SubprogramCount,
3909 Asm->EOL("Region start");
3912 EmitDifference("eh_func_end", SubprogramCount, BeginTag, BeginNumber,
3915 EmitDifference("label", S.EndLabel, BeginTag, BeginNumber, true);
3917 Asm->EOL("Region length");
3922 EmitSectionOffset("label", "eh_func_begin", S.PadLabel, SubprogramCount,
3924 Asm->EOL("Landing pad");
3926 Asm->EmitULEB128Bytes(S.Action);
3930 // Emit the actions.
3931 for (unsigned I = 0, N = Actions.size(); I != N; ++I) {
3932 ActionEntry &Action = Actions[I];
3934 Asm->EmitSLEB128Bytes(Action.ValueForTypeID);
3935 Asm->EOL("TypeInfo index");
3936 Asm->EmitSLEB128Bytes(Action.NextAction);
3937 Asm->EOL("Next action");
3940 // Emit the type ids.
3941 for (unsigned M = TypeInfos.size(); M; --M) {
3942 GlobalVariable *GV = TypeInfos[M - 1];
3944 PrintRelDirective();
3947 O << Asm->getGlobalLinkName(GV);
3951 Asm->EOL("TypeInfo");
3954 // Emit the filter typeids.
3955 for (unsigned j = 0, M = FilterIds.size(); j < M; ++j) {
3956 unsigned TypeID = FilterIds[j];
3957 Asm->EmitULEB128Bytes(TypeID);
3958 Asm->EOL("Filter TypeInfo index");
3961 Asm->EmitAlignment(2, 0, 0, false);
3965 //===--------------------------------------------------------------------===//
3966 // Main entry points.
3968 DwarfException(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
3969 : Dwarf(OS, A, T, "eh")
3970 , shouldEmitTable(false)
3971 , shouldEmitMoves(false)
3972 , shouldEmitTableModule(false)
3973 , shouldEmitMovesModule(false)
3976 virtual ~DwarfException() {}
3978 /// SetModuleInfo - Set machine module information when it's known that pass
3979 /// manager has created it. Set by the target AsmPrinter.
3980 void SetModuleInfo(MachineModuleInfo *mmi) {
3984 /// BeginModule - Emit all exception information that should come prior to the
3986 void BeginModule(Module *M) {
3990 /// EndModule - Emit all exception information that should come after the
3993 if (shouldEmitMovesModule || shouldEmitTableModule) {
3994 const std::vector<Function *> Personalities = MMI->getPersonalities();
3995 for (unsigned i = 0; i < Personalities.size(); ++i)
3996 EmitCommonEHFrame(Personalities[i], i);
3998 for (std::vector<FunctionEHFrameInfo>::iterator I = EHFrames.begin(),
3999 E = EHFrames.end(); I != E; ++I)
4004 /// BeginFunction - Gather pre-function exception information. Assumes being
4005 /// emitted immediately after the function entry point.
4006 void BeginFunction(MachineFunction *MF) {
4008 shouldEmitTable = shouldEmitMoves = false;
4009 if (MMI && TAI->doesSupportExceptionHandling()) {
4011 // Map all labels and get rid of any dead landing pads.
4012 MMI->TidyLandingPads();
4013 // If any landing pads survive, we need an EH table.
4014 if (MMI->getLandingPads().size())
4015 shouldEmitTable = true;
4017 // See if we need frame move info.
4018 if (!MF->getFunction()->doesNotThrow() || UnwindTablesMandatory)
4019 shouldEmitMoves = true;
4021 if (shouldEmitMoves || shouldEmitTable)
4022 // Assumes in correct section after the entry point.
4023 EmitLabel("eh_func_begin", ++SubprogramCount);
4025 shouldEmitTableModule |= shouldEmitTable;
4026 shouldEmitMovesModule |= shouldEmitMoves;
4029 /// EndFunction - Gather and emit post-function exception information.
4031 void EndFunction() {
4032 if (shouldEmitMoves || shouldEmitTable) {
4033 EmitLabel("eh_func_end", SubprogramCount);
4034 EmitExceptionTable();
4036 // Save EH frame information
4038 push_back(FunctionEHFrameInfo(getAsm()->getCurrentFunctionEHName(MF),
4040 MMI->getPersonalityIndex(),
4041 MF->getFrameInfo()->hasCalls(),
4042 !MMI->getLandingPads().empty(),
4043 MMI->getFrameMoves(),
4044 MF->getFunction()));
4049 } // End of namespace llvm
4051 //===----------------------------------------------------------------------===//
4053 /// Emit - Print the abbreviation using the specified Dwarf writer.
4055 void DIEAbbrev::Emit(const DwarfDebug &DD) const {
4056 // Emit its Dwarf tag type.
4057 DD.getAsm()->EmitULEB128Bytes(Tag);
4058 DD.getAsm()->EOL(TagString(Tag));
4060 // Emit whether it has children DIEs.
4061 DD.getAsm()->EmitULEB128Bytes(ChildrenFlag);
4062 DD.getAsm()->EOL(ChildrenString(ChildrenFlag));
4064 // For each attribute description.
4065 for (unsigned i = 0, N = Data.size(); i < N; ++i) {
4066 const DIEAbbrevData &AttrData = Data[i];
4068 // Emit attribute type.
4069 DD.getAsm()->EmitULEB128Bytes(AttrData.getAttribute());
4070 DD.getAsm()->EOL(AttributeString(AttrData.getAttribute()));
4073 DD.getAsm()->EmitULEB128Bytes(AttrData.getForm());
4074 DD.getAsm()->EOL(FormEncodingString(AttrData.getForm()));
4077 // Mark end of abbreviation.
4078 DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(1)");
4079 DD.getAsm()->EmitULEB128Bytes(0); DD.getAsm()->EOL("EOM(2)");
4083 void DIEAbbrev::print(std::ostream &O) {
4084 O << "Abbreviation @"
4085 << std::hex << (intptr_t)this << std::dec
4089 << ChildrenString(ChildrenFlag)
4092 for (unsigned i = 0, N = Data.size(); i < N; ++i) {
4094 << AttributeString(Data[i].getAttribute())
4096 << FormEncodingString(Data[i].getForm())
4100 void DIEAbbrev::dump() { print(cerr); }
4103 //===----------------------------------------------------------------------===//
4106 void DIEValue::dump() {
4111 //===----------------------------------------------------------------------===//
4113 /// EmitValue - Emit integer of appropriate size.
4115 void DIEInteger::EmitValue(DwarfDebug &DD, unsigned Form) {
4117 case DW_FORM_flag: // Fall thru
4118 case DW_FORM_ref1: // Fall thru
4119 case DW_FORM_data1: DD.getAsm()->EmitInt8(Integer); break;
4120 case DW_FORM_ref2: // Fall thru
4121 case DW_FORM_data2: DD.getAsm()->EmitInt16(Integer); break;
4122 case DW_FORM_ref4: // Fall thru
4123 case DW_FORM_data4: DD.getAsm()->EmitInt32(Integer); break;
4124 case DW_FORM_ref8: // Fall thru
4125 case DW_FORM_data8: DD.getAsm()->EmitInt64(Integer); break;
4126 case DW_FORM_udata: DD.getAsm()->EmitULEB128Bytes(Integer); break;
4127 case DW_FORM_sdata: DD.getAsm()->EmitSLEB128Bytes(Integer); break;
4128 default: assert(0 && "DIE Value form not supported yet"); break;
4132 /// SizeOf - Determine size of integer value in bytes.
4134 unsigned DIEInteger::SizeOf(const DwarfDebug &DD, unsigned Form) const {
4136 case DW_FORM_flag: // Fall thru
4137 case DW_FORM_ref1: // Fall thru
4138 case DW_FORM_data1: return sizeof(int8_t);
4139 case DW_FORM_ref2: // Fall thru
4140 case DW_FORM_data2: return sizeof(int16_t);
4141 case DW_FORM_ref4: // Fall thru
4142 case DW_FORM_data4: return sizeof(int32_t);
4143 case DW_FORM_ref8: // Fall thru
4144 case DW_FORM_data8: return sizeof(int64_t);
4145 case DW_FORM_udata: return TargetAsmInfo::getULEB128Size(Integer);
4146 case DW_FORM_sdata: return TargetAsmInfo::getSLEB128Size(Integer);
4147 default: assert(0 && "DIE Value form not supported yet"); break;
4152 //===----------------------------------------------------------------------===//
4154 /// EmitValue - Emit string value.
4156 void DIEString::EmitValue(DwarfDebug &DD, unsigned Form) {
4157 DD.getAsm()->EmitString(String);
4160 //===----------------------------------------------------------------------===//
4162 /// EmitValue - Emit label value.
4164 void DIEDwarfLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
4165 bool IsSmall = Form == DW_FORM_data4;
4166 DD.EmitReference(Label, false, IsSmall);
4169 /// SizeOf - Determine size of label value in bytes.
4171 unsigned DIEDwarfLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
4172 if (Form == DW_FORM_data4) return 4;
4173 return DD.getTargetData()->getPointerSize();
4176 //===----------------------------------------------------------------------===//
4178 /// EmitValue - Emit label value.
4180 void DIEObjectLabel::EmitValue(DwarfDebug &DD, unsigned Form) {
4181 bool IsSmall = Form == DW_FORM_data4;
4182 DD.EmitReference(Label, false, IsSmall);
4185 /// SizeOf - Determine size of label value in bytes.
4187 unsigned DIEObjectLabel::SizeOf(const DwarfDebug &DD, unsigned Form) const {
4188 if (Form == DW_FORM_data4) return 4;
4189 return DD.getTargetData()->getPointerSize();
4192 //===----------------------------------------------------------------------===//
4194 /// EmitValue - Emit delta value.
4196 void DIESectionOffset::EmitValue(DwarfDebug &DD, unsigned Form) {
4197 bool IsSmall = Form == DW_FORM_data4;
4198 DD.EmitSectionOffset(Label.Tag, Section.Tag,
4199 Label.Number, Section.Number, IsSmall, IsEH, UseSet);
4202 /// SizeOf - Determine size of delta value in bytes.
4204 unsigned DIESectionOffset::SizeOf(const DwarfDebug &DD, unsigned Form) const {
4205 if (Form == DW_FORM_data4) return 4;
4206 return DD.getTargetData()->getPointerSize();
4209 //===----------------------------------------------------------------------===//
4211 /// EmitValue - Emit delta value.
4213 void DIEDelta::EmitValue(DwarfDebug &DD, unsigned Form) {
4214 bool IsSmall = Form == DW_FORM_data4;
4215 DD.EmitDifference(LabelHi, LabelLo, IsSmall);
4218 /// SizeOf - Determine size of delta value in bytes.
4220 unsigned DIEDelta::SizeOf(const DwarfDebug &DD, unsigned Form) const {
4221 if (Form == DW_FORM_data4) return 4;
4222 return DD.getTargetData()->getPointerSize();
4225 //===----------------------------------------------------------------------===//
4227 /// EmitValue - Emit debug information entry offset.
4229 void DIEntry::EmitValue(DwarfDebug &DD, unsigned Form) {
4230 DD.getAsm()->EmitInt32(Entry->getOffset());
4233 //===----------------------------------------------------------------------===//
4235 /// ComputeSize - calculate the size of the block.
4237 unsigned DIEBlock::ComputeSize(DwarfDebug &DD) {
4239 const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
4241 for (unsigned i = 0, N = Values.size(); i < N; ++i) {
4242 Size += Values[i]->SizeOf(DD, AbbrevData[i].getForm());
4248 /// EmitValue - Emit block data.
4250 void DIEBlock::EmitValue(DwarfDebug &DD, unsigned Form) {
4252 case DW_FORM_block1: DD.getAsm()->EmitInt8(Size); break;
4253 case DW_FORM_block2: DD.getAsm()->EmitInt16(Size); break;
4254 case DW_FORM_block4: DD.getAsm()->EmitInt32(Size); break;
4255 case DW_FORM_block: DD.getAsm()->EmitULEB128Bytes(Size); break;
4256 default: assert(0 && "Improper form for block"); break;
4259 const SmallVector<DIEAbbrevData, 8> &AbbrevData = Abbrev.getData();
4261 for (unsigned i = 0, N = Values.size(); i < N; ++i) {
4263 Values[i]->EmitValue(DD, AbbrevData[i].getForm());
4267 /// SizeOf - Determine size of block data in bytes.
4269 unsigned DIEBlock::SizeOf(const DwarfDebug &DD, unsigned Form) const {
4271 case DW_FORM_block1: return Size + sizeof(int8_t);
4272 case DW_FORM_block2: return Size + sizeof(int16_t);
4273 case DW_FORM_block4: return Size + sizeof(int32_t);
4274 case DW_FORM_block: return Size + TargetAsmInfo::getULEB128Size(Size);
4275 default: assert(0 && "Improper form for block"); break;
4280 //===----------------------------------------------------------------------===//
4281 /// DIE Implementation
4284 for (unsigned i = 0, N = Children.size(); i < N; ++i)
4288 /// AddSiblingOffset - Add a sibling offset field to the front of the DIE.
4290 void DIE::AddSiblingOffset() {
4291 DIEInteger *DI = new DIEInteger(0);
4292 Values.insert(Values.begin(), DI);
4293 Abbrev.AddFirstAttribute(DW_AT_sibling, DW_FORM_ref4);
4296 /// Profile - Used to gather unique data for the value folding set.
4298 void DIE::Profile(FoldingSetNodeID &ID) {
4301 for (unsigned i = 0, N = Children.size(); i < N; ++i)
4302 ID.AddPointer(Children[i]);
4304 for (unsigned j = 0, M = Values.size(); j < M; ++j)
4305 ID.AddPointer(Values[j]);
4309 void DIE::print(std::ostream &O, unsigned IncIndent) {
4310 static unsigned IndentCount = 0;
4311 IndentCount += IncIndent;
4312 const std::string Indent(IndentCount, ' ');
4313 bool isBlock = Abbrev.getTag() == 0;
4318 << "0x" << std::hex << (intptr_t)this << std::dec
4319 << ", Offset: " << Offset
4320 << ", Size: " << Size
4324 << TagString(Abbrev.getTag())
4326 << ChildrenString(Abbrev.getChildrenFlag());
4328 O << "Size: " << Size;
4332 const SmallVector<DIEAbbrevData, 8> &Data = Abbrev.getData();
4335 for (unsigned i = 0, N = Data.size(); i < N; ++i) {
4339 O << AttributeString(Data[i].getAttribute());
4341 O << "Blk[" << i << "]";
4344 << FormEncodingString(Data[i].getForm())
4346 Values[i]->print(O);
4351 for (unsigned j = 0, M = Children.size(); j < M; ++j) {
4352 Children[j]->print(O, 4);
4355 if (!isBlock) O << "\n";
4356 IndentCount -= IncIndent;
4364 //===----------------------------------------------------------------------===//
4365 /// DwarfWriter Implementation
4368 DwarfWriter::DwarfWriter() : ImmutablePass(&ID), DD(NULL), DE(NULL) {
4371 DwarfWriter::~DwarfWriter() {
4376 /// BeginModule - Emit all Dwarf sections that should come prior to the
4378 void DwarfWriter::BeginModule(Module *M,
4379 MachineModuleInfo *MMI,
4380 raw_ostream &OS, AsmPrinter *A,
4381 const TargetAsmInfo *T) {
4382 DE = new DwarfException(OS, A, T);
4383 DD = new DwarfDebug(OS, A, T);
4386 DD->SetDebugInfo(MMI);
4387 DE->SetModuleInfo(MMI);
4390 /// EndModule - Emit all Dwarf sections that should come after the content.
4392 void DwarfWriter::EndModule() {
4397 /// BeginFunction - Gather pre-function debug information. Assumes being
4398 /// emitted immediately after the function entry point.
4399 void DwarfWriter::BeginFunction(MachineFunction *MF) {
4400 DE->BeginFunction(MF);
4401 DD->BeginFunction(MF);
4404 /// EndFunction - Gather and emit post-function debug information.
4406 void DwarfWriter::EndFunction(MachineFunction *MF) {
4407 DD->EndFunction(MF);
4410 if (MachineModuleInfo *MMI = DD->getMMI() ? DD->getMMI() : DE->getMMI())
4411 // Clear function debug information.
4415 /// ValidDebugInfo - Return true if V represents valid debug info value.
4416 bool DwarfWriter::ValidDebugInfo(Value *V) {
4417 return DD && DD->ValidDebugInfo(V);
4420 /// RecordSourceLine - Records location information and associates it with a
4421 /// label. Returns a unique label ID used to generate a label and provide
4422 /// correspondence to the source line list.
4423 unsigned DwarfWriter::RecordSourceLine(unsigned Line, unsigned Col,
4425 return DD->RecordSourceLine(Line, Col, Src);
4428 /// getOrCreateSourceID - Look up the source id with the given directory and
4429 /// source file names. If none currently exists, create a new id and insert it
4430 /// in the SourceIds map. This can update DirectoryNames and SourceFileNames maps
4432 unsigned DwarfWriter::getOrCreateSourceID(const std::string &DirName,
4433 const std::string &FileName) {
4434 return DD->getOrCreateSourceID(DirName, FileName);
4437 /// RecordRegionStart - Indicate the start of a region.
4438 unsigned DwarfWriter::RecordRegionStart(GlobalVariable *V) {
4439 return DD->RecordRegionStart(V);
4442 /// RecordRegionEnd - Indicate the end of a region.
4443 unsigned DwarfWriter::RecordRegionEnd(GlobalVariable *V) {
4444 return DD->RecordRegionEnd(V);
4447 /// getRecordSourceLineCount - Count source lines.
4448 unsigned DwarfWriter::getRecordSourceLineCount() {
4449 return DD->getRecordSourceLineCount();
4452 /// RecordVariable - Indicate the declaration of a local variable.
4454 void DwarfWriter::RecordVariable(GlobalVariable *GV, unsigned FrameIndex) {
4455 DD->RecordVariable(GV, FrameIndex);
4458 /// ShouldEmitDwarfDebug - Returns true if Dwarf debugging declarations should
4460 bool DwarfWriter::ShouldEmitDwarfDebug() const {
4461 return DD->ShouldEmitDwarfDebug();